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/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 250
 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 252                                 encode_verifier_maxsz + \
 253                                 1 /* co_ownerid.len */ + \
 254                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 255                                 1 /* flags */ + \
 256                                 1 /* spa_how */ + \
 257                                 0 /* SP4_NONE (for now) */ + \
 258                                 1 /* zero implemetation id array */)
 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 260                                 2 /* eir_clientid */ + \
 261                                 1 /* eir_sequenceid */ + \
 262                                 1 /* eir_flags */ + \
 263                                 1 /* spr_how */ + \
 264                                 0 /* SP4_NONE (for now) */ + \
 265                                 2 /* eir_server_owner.so_minor_id */ + \
 266                                 /* eir_server_owner.so_major_id<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 /* eir_server_scope<> */ \
 269                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 270                                 1 /* eir_server_impl_id array length */ + \
 271                                 0 /* ignored eir_server_impl_id contents */)
 272 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 273 #define decode_channel_attrs_maxsz  (6 + \
 274                                      1 /* ca_rdma_ird.len */ + \
 275                                      1 /* ca_rdma_ird */)
 276 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 277                                      2 /* csa_clientid */ + \
 278                                      1 /* csa_sequence */ + \
 279                                      1 /* csa_flags */ + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      1 /* csa_cb_program */ + \
 283                                      1 /* csa_sec_parms.len (1) */ + \
 284                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 285                                      1 /* stamp */ + \
 286                                      1 /* machinename.len */ + \
 287                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 288                                      1 /* uid */ + \
 289                                      1 /* gid */ + \
 290                                      1 /* gids.len (0) */)
 291 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 292                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 293                                      1 /* csr_sequence */ + \
 294                                      1 /* csr_flags */ + \
 295                                      decode_channel_attrs_maxsz + \
 296                                      decode_channel_attrs_maxsz)
 297 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 298 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 299 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 300                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 301 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 302                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 303 #else /* CONFIG_NFS_V4_1 */
 304 #define encode_sequence_maxsz   0
 305 #define decode_sequence_maxsz   0
 306 #endif /* CONFIG_NFS_V4_1 */
 307
 308 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 310 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 311                                 encode_sequence_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_read_maxsz)
 314 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 315                                 decode_sequence_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 decode_read_maxsz)
 318 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 319                                 encode_sequence_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_readlink_maxsz)
 322 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 323                                 decode_sequence_maxsz + \
 324                                 decode_putfh_maxsz + \
 325                                 decode_readlink_maxsz)
 326 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 327                                 encode_sequence_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_readdir_maxsz)
 330 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 331                                 decode_sequence_maxsz + \
 332                                 decode_putfh_maxsz + \
 333                                 decode_readdir_maxsz)
 334 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_write_maxsz + \
 338                                 encode_getattr_maxsz)
 339 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 340                                 decode_sequence_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_write_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_commit_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_commit_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_savefh_maxsz + \
 358                                 encode_open_maxsz + \
 359                                 encode_getfh_maxsz + \
 360                                 encode_getattr_maxsz + \
 361                                 encode_restorefh_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_savefh_maxsz + \
 367                                 decode_open_maxsz + \
 368                                 decode_getfh_maxsz + \
 369                                 decode_getattr_maxsz + \
 370                                 decode_restorefh_maxsz + \
 371                                 decode_getattr_maxsz)
 372 #define NFS4_enc_open_confirm_sz \
 373                                 (compound_encode_hdr_maxsz + \
 374                                  encode_putfh_maxsz + \
 375                                  encode_open_confirm_maxsz)
 376 #define NFS4_dec_open_confirm_sz \
 377                                 (compound_decode_hdr_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_open_confirm_maxsz)
 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 381                                         encode_sequence_maxsz + \
 382                                         encode_putfh_maxsz + \
 383                                         encode_open_maxsz + \
 384                                         encode_getattr_maxsz)
 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 386                                         decode_sequence_maxsz + \
 387                                         decode_putfh_maxsz + \
 388                                         decode_open_maxsz + \
 389                                         decode_getattr_maxsz)
 390 #define NFS4_enc_open_downgrade_sz \
 391                                 (compound_encode_hdr_maxsz + \
 392                                  encode_sequence_maxsz + \
 393                                  encode_putfh_maxsz + \
 394                                  encode_open_downgrade_maxsz + \
 395                                  encode_getattr_maxsz)
 396 #define NFS4_dec_open_downgrade_sz \
 397                                 (compound_decode_hdr_maxsz + \
 398                                  decode_sequence_maxsz + \
 399                                  decode_putfh_maxsz + \
 400                                  decode_open_downgrade_maxsz + \
 401                                  decode_getattr_maxsz)
 402 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 403                                  encode_sequence_maxsz + \
 404                                  encode_putfh_maxsz + \
 405                                  encode_close_maxsz + \
 406                                  encode_getattr_maxsz)
 407 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_close_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_setattr_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_setattr_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_fsinfo_maxsz)
 426 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_fsinfo_maxsz)
 430 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 431                                 encode_renew_maxsz)
 432 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 433                                 decode_renew_maxsz)
 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 435                                 encode_setclientid_maxsz)
 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 437                                 decode_setclientid_maxsz)
 438 #define NFS4_enc_setclientid_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                 encode_setclientid_confirm_maxsz + \
 441                                 encode_putrootfh_maxsz + \
 442                                 encode_fsinfo_maxsz)
 443 #define NFS4_dec_setclientid_confirm_sz \
 444                                 (compound_decode_hdr_maxsz + \
 445                                 decode_setclientid_confirm_maxsz + \
 446                                 decode_putrootfh_maxsz + \
 447                                 decode_fsinfo_maxsz)
 448 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_lock_maxsz)
 452 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_lock_maxsz)
 456 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_lockt_maxsz)
 460 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_lockt_maxsz)
 464 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_locku_maxsz)
 468 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_locku_maxsz)
 472 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_access_maxsz + \
 476                                 encode_getattr_maxsz)
 477 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getattr_maxsz)
 482 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_getattr_maxsz)
 490 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_lookup_maxsz + \
 494                                 encode_getattr_maxsz + \
 495                                 encode_getfh_maxsz)
 496 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 497                                 decode_sequence_maxsz + \
 498                                 decode_putfh_maxsz + \
 499                                 decode_lookup_maxsz + \
 500                                 decode_getattr_maxsz + \
 501                                 decode_getfh_maxsz)
 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putrootfh_maxsz + \
 505                                 encode_getattr_maxsz + \
 506                                 encode_getfh_maxsz)
 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putrootfh_maxsz + \
 510                                 decode_getattr_maxsz + \
 511                                 decode_getfh_maxsz)
 512 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_remove_maxsz + \
 516                                 encode_getattr_maxsz)
 517 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 518                                 decode_sequence_maxsz + \
 519                                 decode_putfh_maxsz + \
 520                                 decode_remove_maxsz + \
 521                                 decode_getattr_maxsz)
 522 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_savefh_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_rename_maxsz + \
 528                                 encode_getattr_maxsz + \
 529                                 encode_restorefh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_savefh_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_rename_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_restorefh_maxsz + \
 539                                 decode_getattr_maxsz)
 540 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 541                                 encode_sequence_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_savefh_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_link_maxsz + \
 546                                 decode_getattr_maxsz + \
 547                                 encode_restorefh_maxsz + \
 548                                 decode_getattr_maxsz)
 549 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_savefh_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_link_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_restorefh_maxsz + \
 557                                 decode_getattr_maxsz)
 558 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_symlink_maxsz + \
 562                                 encode_getattr_maxsz + \
 563                                 encode_getfh_maxsz)
 564 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 565                                 decode_sequence_maxsz + \
 566                                 decode_putfh_maxsz + \
 567                                 decode_symlink_maxsz + \
 568                                 decode_getattr_maxsz + \
 569                                 decode_getfh_maxsz)
 570 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_create_maxsz + \
 575                                 encode_getfh_maxsz + \
 576                                 encode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 encode_getattr_maxsz)
 579 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_create_maxsz + \
 584                                 decode_getfh_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_statfs_maxsz)
 600 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_statfs_maxsz)
 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_delegreturn_maxsz + \
 616                                 encode_getattr_maxsz)
 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_delegreturn_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_getacl_maxsz)
 625 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_getacl_maxsz)
 629 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_setacl_maxsz)
 633 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_setacl_maxsz)
 637 #define NFS4_enc_fs_locations_sz \
 638                                 (compound_encode_hdr_maxsz + \
 639                                  encode_sequence_maxsz + \
 640                                  encode_putfh_maxsz + \
 641                                  encode_lookup_maxsz + \
 642                                  encode_fs_locations_maxsz)
 643 #define NFS4_dec_fs_locations_sz \
 644                                 (compound_decode_hdr_maxsz + \
 645                                  decode_sequence_maxsz + \
 646                                  decode_putfh_maxsz + \
 647                                  decode_lookup_maxsz + \
 648                                  decode_fs_locations_maxsz)
 649 #if defined(CONFIG_NFS_V4_1)
 650 #define NFS4_enc_exchange_id_sz \
 651                                 (compound_encode_hdr_maxsz + \
 652                                  encode_exchange_id_maxsz)
 653 #define NFS4_dec_exchange_id_sz \
 654                                 (compound_decode_hdr_maxsz + \
 655                                  decode_exchange_id_maxsz)
 656 #define NFS4_enc_create_session_sz \
 657                                 (compound_encode_hdr_maxsz + \
 658                                  encode_create_session_maxsz)
 659 #define NFS4_dec_create_session_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_create_session_maxsz)
 662 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 663                                          encode_destroy_session_maxsz)
 664 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 665                                          decode_destroy_session_maxsz)
 666 #define NFS4_enc_sequence_sz \
 667                                 (compound_decode_hdr_maxsz + \
 668                                  encode_sequence_maxsz)
 669 #define NFS4_dec_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_sequence_maxsz)
 672 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 673                                          encode_sequence_maxsz + \
 674                                          encode_putrootfh_maxsz + \
 675                                          encode_fsinfo_maxsz)
 676 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 677                                          decode_sequence_maxsz + \
 678                                          decode_putrootfh_maxsz + \
 679                                          decode_fsinfo_maxsz)
 680 #endif /* CONFIG_NFS_V4_1 */
 681
 682 static const umode_t nfs_type2fmt[] = {
 683         [NF4BAD] = 0,
 684         [NF4REG] = S_IFREG,
 685         [NF4DIR] = S_IFDIR,
 686         [NF4BLK] = S_IFBLK,
 687         [NF4CHR] = S_IFCHR,
 688         [NF4LNK] = S_IFLNK,
 689         [NF4SOCK] = S_IFSOCK,
 690         [NF4FIFO] = S_IFIFO,
 691         [NF4ATTRDIR] = 0,
 692         [NF4NAMEDATTR] = 0,
 693 };
 694
 695 struct compound_hdr {
 696         int32_t         status;
 697         uint32_t        nops;
 698         __be32 *        nops_p;
 699         uint32_t        taglen;
 700         char *          tag;
 701         uint32_t        replen;         /* expected reply words */
 702         u32             minorversion;
 703 };
 704
 705 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 706 {
 707         __be32 *p = xdr_reserve_space(xdr, nbytes);
 708         BUG_ON(!p);
 709         return p;
 710 }
 711
 712 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 713 {
 714         __be32 *p;
 715
 716         p = xdr_reserve_space(xdr, 4 + len);
 717         BUG_ON(p == NULL);
 718         xdr_encode_opaque(p, str, len);
 719 }
 720
 721 static void encode_compound_hdr(struct xdr_stream *xdr,
 722                                 struct rpc_rqst *req,
 723                                 struct compound_hdr *hdr)
 724 {
 725         __be32 *p;
 726         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 727
 728         /* initialize running count of expected bytes in reply.
 729          * NOTE: the replied tag SHOULD be the same is the one sent,
 730          * but this is not required as a MUST for the server to do so. */
 731         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 732
 733         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 734         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 735         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 736         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 737         *p++ = cpu_to_be32(hdr->minorversion);
 738         hdr->nops_p = p;
 739         *p = cpu_to_be32(hdr->nops);
 740 }
 741
 742 static void encode_nops(struct compound_hdr *hdr)
 743 {
 744         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 745         *hdr->nops_p = htonl(hdr->nops);
 746 }
 747
 748 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 749 {
 750         __be32 *p;
 751
 752         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 753         BUG_ON(p == NULL);
 754         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 755 }
 756
 757 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 758 {
 759         char owner_name[IDMAP_NAMESZ];
 760         char owner_group[IDMAP_NAMESZ];
 761         int owner_namelen = 0;
 762         int owner_grouplen = 0;
 763         __be32 *p;
 764         __be32 *q;
 765         int len;
 766         uint32_t bmval0 = 0;
 767         uint32_t bmval1 = 0;
 768
 769         /*
 770          * We reserve enough space to write the entire attribute buffer at once.
 771          * In the worst-case, this would be
 772          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 773          *          = 36 bytes, plus any contribution from variable-length fields
 774          *            such as owner/group.
 775          */
 776         len = 16;
 777
 778         /* Sigh */
 779         if (iap->ia_valid & ATTR_SIZE)
 780                 len += 8;
 781         if (iap->ia_valid & ATTR_MODE)
 782                 len += 4;
 783         if (iap->ia_valid & ATTR_UID) {
 784                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 785                 if (owner_namelen < 0) {
 786                         dprintk("nfs: couldn't resolve uid %d to string\n",
 787                                         iap->ia_uid);
 788                         /* XXX */
 789                         strcpy(owner_name, "nobody");
 790                         owner_namelen = sizeof("nobody") - 1;
 791                         /* goto out; */
 792                 }
 793                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 794         }
 795         if (iap->ia_valid & ATTR_GID) {
 796                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 797                 if (owner_grouplen < 0) {
 798                         dprintk("nfs: couldn't resolve gid %d to string\n",
 799                                         iap->ia_gid);
 800                         strcpy(owner_group, "nobody");
 801                         owner_grouplen = sizeof("nobody") - 1;
 802                         /* goto out; */
 803                 }
 804                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 805         }
 806         if (iap->ia_valid & ATTR_ATIME_SET)
 807                 len += 16;
 808         else if (iap->ia_valid & ATTR_ATIME)
 809                 len += 4;
 810         if (iap->ia_valid & ATTR_MTIME_SET)
 811                 len += 16;
 812         else if (iap->ia_valid & ATTR_MTIME)
 813                 len += 4;
 814         p = reserve_space(xdr, len);
 815
 816         /*
 817          * We write the bitmap length now, but leave the bitmap and the attribute
 818          * buffer length to be backfilled at the end of this routine.
 819          */
 820         *p++ = cpu_to_be32(2);
 821         q = p;
 822         p += 3;
 823
 824         if (iap->ia_valid & ATTR_SIZE) {
 825                 bmval0 |= FATTR4_WORD0_SIZE;
 826                 p = xdr_encode_hyper(p, iap->ia_size);
 827         }
 828         if (iap->ia_valid & ATTR_MODE) {
 829                 bmval1 |= FATTR4_WORD1_MODE;
 830                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 831         }
 832         if (iap->ia_valid & ATTR_UID) {
 833                 bmval1 |= FATTR4_WORD1_OWNER;
 834                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 835         }
 836         if (iap->ia_valid & ATTR_GID) {
 837                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 838                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 839         }
 840         if (iap->ia_valid & ATTR_ATIME_SET) {
 841                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 842                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 843                 *p++ = cpu_to_be32(0);
 844                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 845                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 846         }
 847         else if (iap->ia_valid & ATTR_ATIME) {
 848                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 849                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 850         }
 851         if (iap->ia_valid & ATTR_MTIME_SET) {
 852                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 853                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 854                 *p++ = cpu_to_be32(0);
 855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 856                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 857         }
 858         else if (iap->ia_valid & ATTR_MTIME) {
 859                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 860                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 861         }
 862
 863         /*
 864          * Now we backfill the bitmap and the attribute buffer length.
 865          */
 866         if (len != ((char *)p - (char *)q) + 4) {
 867                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 868                                 len, ((char *)p - (char *)q) + 4);
 869                 BUG();
 870         }
 871         len = (char *)p - (char *)q - 12;
 872         *q++ = htonl(bmval0);
 873         *q++ = htonl(bmval1);
 874         *q = htonl(len);
 875
 876 /* out: */
 877 }
 878
 879 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 880 {
 881         __be32 *p;
 882
 883         p = reserve_space(xdr, 8);
 884         *p++ = cpu_to_be32(OP_ACCESS);
 885         *p = cpu_to_be32(access);
 886         hdr->nops++;
 887         hdr->replen += decode_access_maxsz;
 888 }
 889
 890 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 891 {
 892         __be32 *p;
 893
 894         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 895         *p++ = cpu_to_be32(OP_CLOSE);
 896         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 897         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 898         hdr->nops++;
 899         hdr->replen += decode_close_maxsz;
 900 }
 901
 902 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 903 {
 904         __be32 *p;
 905
 906         p = reserve_space(xdr, 16);
 907         *p++ = cpu_to_be32(OP_COMMIT);
 908         p = xdr_encode_hyper(p, args->offset);
 909         *p = cpu_to_be32(args->count);
 910         hdr->nops++;
 911         hdr->replen += decode_commit_maxsz;
 912 }
 913
 914 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 915 {
 916         __be32 *p;
 917
 918         p = reserve_space(xdr, 8);
 919         *p++ = cpu_to_be32(OP_CREATE);
 920         *p = cpu_to_be32(create->ftype);
 921
 922         switch (create->ftype) {
 923         case NF4LNK:
 924                 p = reserve_space(xdr, 4);
 925                 *p = cpu_to_be32(create->u.symlink.len);
 926                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 927                 break;
 928
 929         case NF4BLK: case NF4CHR:
 930                 p = reserve_space(xdr, 8);
 931                 *p++ = cpu_to_be32(create->u.device.specdata1);
 932                 *p = cpu_to_be32(create->u.device.specdata2);
 933                 break;
 934
 935         default:
 936                 break;
 937         }
 938
 939         encode_string(xdr, create->name->len, create->name->name);
 940         hdr->nops++;
 941         hdr->replen += decode_create_maxsz;
 942
 943         encode_attrs(xdr, create->attrs, create->server);
 944 }
 945
 946 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 947 {
 948         __be32 *p;
 949
 950         p = reserve_space(xdr, 12);
 951         *p++ = cpu_to_be32(OP_GETATTR);
 952         *p++ = cpu_to_be32(1);
 953         *p = cpu_to_be32(bitmap);
 954         hdr->nops++;
 955         hdr->replen += decode_getattr_maxsz;
 956 }
 957
 958 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 959 {
 960         __be32 *p;
 961
 962         p = reserve_space(xdr, 16);
 963         *p++ = cpu_to_be32(OP_GETATTR);
 964         *p++ = cpu_to_be32(2);
 965         *p++ = cpu_to_be32(bm0);
 966         *p = cpu_to_be32(bm1);
 967         hdr->nops++;
 968         hdr->replen += decode_getattr_maxsz;
 969 }
 970
 971 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 972 {
 973         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 974                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 975 }
 976
 977 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 978 {
 979         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 980                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 981 }
 982
 983 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 984 {
 985         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 986                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 987 }
 988
 989 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 990 {
 991         __be32 *p;
 992
 993         p = reserve_space(xdr, 4);
 994         *p = cpu_to_be32(OP_GETFH);
 995         hdr->nops++;
 996         hdr->replen += decode_getfh_maxsz;
 997 }
 998
 999 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1000 {
1001         __be32 *p;
1002
1003         p = reserve_space(xdr, 8 + name->len);
1004         *p++ = cpu_to_be32(OP_LINK);
1005         xdr_encode_opaque(p, name->name, name->len);
1006         hdr->nops++;
1007         hdr->replen += decode_link_maxsz;
1008 }
1009
1010 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1011 {
1012         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1013                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1014         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1015 }
1016
1017 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1018 {
1019         if (fl->fl_end == OFFSET_MAX)
1020                 return ~(uint64_t)0;
1021         return fl->fl_end - fl->fl_start + 1;
1022 }
1023
1024 /*
1025  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1026  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1027  */
1028 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1029 {
1030         __be32 *p;
1031
1032         p = reserve_space(xdr, 32);
1033         *p++ = cpu_to_be32(OP_LOCK);
1034         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1035         *p++ = cpu_to_be32(args->reclaim);
1036         p = xdr_encode_hyper(p, args->fl->fl_start);
1037         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1038         *p = cpu_to_be32(args->new_lock_owner);
1039         if (args->new_lock_owner){
1040                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1041                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1042                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1043                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1044                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1045                 *p++ = cpu_to_be32(16);
1046                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1047                 xdr_encode_hyper(p, args->lock_owner.id);
1048         }
1049         else {
1050                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1051                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1052                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1053         }
1054         hdr->nops++;
1055         hdr->replen += decode_lock_maxsz;
1056 }
1057
1058 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1059 {
1060         __be32 *p;
1061
1062         p = reserve_space(xdr, 52);
1063         *p++ = cpu_to_be32(OP_LOCKT);
1064         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1065         p = xdr_encode_hyper(p, args->fl->fl_start);
1066         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1067         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1068         *p++ = cpu_to_be32(16);
1069         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1070         xdr_encode_hyper(p, args->lock_owner.id);
1071         hdr->nops++;
1072         hdr->replen += decode_lockt_maxsz;
1073 }
1074
1075 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1076 {
1077         __be32 *p;
1078
1079         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1080         *p++ = cpu_to_be32(OP_LOCKU);
1081         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1082         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1083         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1084         p = xdr_encode_hyper(p, args->fl->fl_start);
1085         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1086         hdr->nops++;
1087         hdr->replen += decode_locku_maxsz;
1088 }
1089
1090 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1091 {
1092         int len = name->len;
1093         __be32 *p;
1094
1095         p = reserve_space(xdr, 8 + len);
1096         *p++ = cpu_to_be32(OP_LOOKUP);
1097         xdr_encode_opaque(p, name->name, len);
1098         hdr->nops++;
1099         hdr->replen += decode_lookup_maxsz;
1100 }
1101
1102 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1103 {
1104         __be32 *p;
1105
1106         p = reserve_space(xdr, 8);
1107         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1108         case FMODE_READ:
1109                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1110                 break;
1111         case FMODE_WRITE:
1112                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1113                 break;
1114         case FMODE_READ|FMODE_WRITE:
1115                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1116                 break;
1117         default:
1118                 *p++ = cpu_to_be32(0);
1119         }
1120         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1121 }
1122
1123 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1124 {
1125         __be32 *p;
1126  /*
1127  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1128  * owner 4 = 32
1129  */
1130         p = reserve_space(xdr, 8);
1131         *p++ = cpu_to_be32(OP_OPEN);
1132         *p = cpu_to_be32(arg->seqid->sequence->counter);
1133         encode_share_access(xdr, arg->fmode);
1134         p = reserve_space(xdr, 28);
1135         p = xdr_encode_hyper(p, arg->clientid);
1136         *p++ = cpu_to_be32(16);
1137         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1138         xdr_encode_hyper(p, arg->id);
1139 }
1140
1141 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1142 {
1143         __be32 *p;
1144
1145         p = reserve_space(xdr, 4);
1146         switch(arg->open_flags & O_EXCL) {
1147         case 0:
1148                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1149                 encode_attrs(xdr, arg->u.attrs, arg->server);
1150                 break;
1151         default:
1152                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1153                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1154         }
1155 }
1156
1157 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1158 {
1159         __be32 *p;
1160
1161         p = reserve_space(xdr, 4);
1162         switch (arg->open_flags & O_CREAT) {
1163         case 0:
1164                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1165                 break;
1166         default:
1167                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1168                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1169                 encode_createmode(xdr, arg);
1170         }
1171 }
1172
1173 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1174 {
1175         __be32 *p;
1176
1177         p = reserve_space(xdr, 4);
1178         switch (delegation_type) {
1179         case 0:
1180                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1181                 break;
1182         case FMODE_READ:
1183                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1184                 break;
1185         case FMODE_WRITE|FMODE_READ:
1186                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1187                 break;
1188         default:
1189                 BUG();
1190         }
1191 }
1192
1193 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1194 {
1195         __be32 *p;
1196
1197         p = reserve_space(xdr, 4);
1198         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1199         encode_string(xdr, name->len, name->name);
1200 }
1201
1202 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1203 {
1204         __be32 *p;
1205
1206         p = reserve_space(xdr, 4);
1207         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1208         encode_delegation_type(xdr, type);
1209 }
1210
1211 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1212 {
1213         __be32 *p;
1214
1215         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1216         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1217         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1218         encode_string(xdr, name->len, name->name);
1219 }
1220
1221 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1222 {
1223         encode_openhdr(xdr, arg);
1224         encode_opentype(xdr, arg);
1225         switch (arg->claim) {
1226         case NFS4_OPEN_CLAIM_NULL:
1227                 encode_claim_null(xdr, arg->name);
1228                 break;
1229         case NFS4_OPEN_CLAIM_PREVIOUS:
1230                 encode_claim_previous(xdr, arg->u.delegation_type);
1231                 break;
1232         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1233                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1234                 break;
1235         default:
1236                 BUG();
1237         }
1238         hdr->nops++;
1239         hdr->replen += decode_open_maxsz;
1240 }
1241
1242 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1243 {
1244         __be32 *p;
1245
1246         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1247         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1248         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1249         *p = cpu_to_be32(arg->seqid->sequence->counter);
1250         hdr->nops++;
1251         hdr->replen += decode_open_confirm_maxsz;
1252 }
1253
1254 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1255 {
1256         __be32 *p;
1257
1258         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1259         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1260         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1261         *p = cpu_to_be32(arg->seqid->sequence->counter);
1262         encode_share_access(xdr, arg->fmode);
1263         hdr->nops++;
1264         hdr->replen += decode_open_downgrade_maxsz;
1265 }
1266
1267 static void
1268 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1269 {
1270         int len = fh->size;
1271         __be32 *p;
1272
1273         p = reserve_space(xdr, 8 + len);
1274         *p++ = cpu_to_be32(OP_PUTFH);
1275         xdr_encode_opaque(p, fh->data, len);
1276         hdr->nops++;
1277         hdr->replen += decode_putfh_maxsz;
1278 }
1279
1280 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1281 {
1282         __be32 *p;
1283
1284         p = reserve_space(xdr, 4);
1285         *p = cpu_to_be32(OP_PUTROOTFH);
1286         hdr->nops++;
1287         hdr->replen += decode_putrootfh_maxsz;
1288 }
1289
1290 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1291 {
1292         nfs4_stateid stateid;
1293         __be32 *p;
1294
1295         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1296         if (ctx->state != NULL) {
1297                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1298                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1299         } else
1300                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1301 }
1302
1303 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         p = reserve_space(xdr, 4);
1308         *p = cpu_to_be32(OP_READ);
1309
1310         encode_stateid(xdr, args->context);
1311
1312         p = reserve_space(xdr, 12);
1313         p = xdr_encode_hyper(p, args->offset);
1314         *p = cpu_to_be32(args->count);
1315         hdr->nops++;
1316         hdr->replen += decode_read_maxsz;
1317 }
1318
1319 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1320 {
1321         uint32_t attrs[2] = {
1322                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1323                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1324         };
1325         __be32 *p;
1326
1327         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1328         *p++ = cpu_to_be32(OP_READDIR);
1329         p = xdr_encode_hyper(p, readdir->cookie);
1330         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1331         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1332         *p++ = cpu_to_be32(readdir->count);
1333         *p++ = cpu_to_be32(2);
1334         /* Switch to mounted_on_fileid if the server supports it */
1335         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1336                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1337         else
1338                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1339         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1340         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1341         hdr->nops++;
1342         hdr->replen += decode_readdir_maxsz;
1343         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1344                         __func__,
1345                         (unsigned long long)readdir->cookie,
1346                         ((u32 *)readdir->verifier.data)[0],
1347                         ((u32 *)readdir->verifier.data)[1],
1348                         attrs[0] & readdir->bitmask[0],
1349                         attrs[1] & readdir->bitmask[1]);
1350 }
1351
1352 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1353 {
1354         __be32 *p;
1355
1356         p = reserve_space(xdr, 4);
1357         *p = cpu_to_be32(OP_READLINK);
1358         hdr->nops++;
1359         hdr->replen += decode_readlink_maxsz;
1360 }
1361
1362 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 8 + name->len);
1367         *p++ = cpu_to_be32(OP_REMOVE);
1368         xdr_encode_opaque(p, name->name, name->len);
1369         hdr->nops++;
1370         hdr->replen += decode_remove_maxsz;
1371 }
1372
1373 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1374 {
1375         __be32 *p;
1376
1377         p = reserve_space(xdr, 4);
1378         *p = cpu_to_be32(OP_RENAME);
1379         encode_string(xdr, oldname->len, oldname->name);
1380         encode_string(xdr, newname->len, newname->name);
1381         hdr->nops++;
1382         hdr->replen += decode_rename_maxsz;
1383 }
1384
1385 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1386 {
1387         __be32 *p;
1388
1389         p = reserve_space(xdr, 12);
1390         *p++ = cpu_to_be32(OP_RENEW);
1391         xdr_encode_hyper(p, client_stateid->cl_clientid);
1392         hdr->nops++;
1393         hdr->replen += decode_renew_maxsz;
1394 }
1395
1396 static void
1397 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1398 {
1399         __be32 *p;
1400
1401         p = reserve_space(xdr, 4);
1402         *p = cpu_to_be32(OP_RESTOREFH);
1403         hdr->nops++;
1404         hdr->replen += decode_restorefh_maxsz;
1405 }
1406
1407 static int
1408 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1409 {
1410         __be32 *p;
1411
1412         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1413         *p++ = cpu_to_be32(OP_SETATTR);
1414         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1415         p = reserve_space(xdr, 2*4);
1416         *p++ = cpu_to_be32(1);
1417         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1418         if (arg->acl_len % 4)
1419                 return -EINVAL;
1420         p = reserve_space(xdr, 4);
1421         *p = cpu_to_be32(arg->acl_len);
1422         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1423         hdr->nops++;
1424         hdr->replen += decode_setacl_maxsz;
1425         return 0;
1426 }
1427
1428 static void
1429 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(OP_SAVEFH);
1435         hdr->nops++;
1436         hdr->replen += decode_savefh_maxsz;
1437 }
1438
1439 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1440 {
1441         __be32 *p;
1442
1443         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1444         *p++ = cpu_to_be32(OP_SETATTR);
1445         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1446         hdr->nops++;
1447         hdr->replen += decode_setattr_maxsz;
1448         encode_attrs(xdr, arg->iap, server);
1449 }
1450
1451 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1456         *p++ = cpu_to_be32(OP_SETCLIENTID);
1457         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1458
1459         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1460         p = reserve_space(xdr, 4);
1461         *p = cpu_to_be32(setclientid->sc_prog);
1462         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1463         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1464         p = reserve_space(xdr, 4);
1465         *p = cpu_to_be32(setclientid->sc_cb_ident);
1466         hdr->nops++;
1467         hdr->replen += decode_setclientid_maxsz;
1468 }
1469
1470 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1475         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1476         p = xdr_encode_hyper(p, client_state->cl_clientid);
1477         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1478         hdr->nops++;
1479         hdr->replen += decode_setclientid_confirm_maxsz;
1480 }
1481
1482 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1483 {
1484         __be32 *p;
1485
1486         p = reserve_space(xdr, 4);
1487         *p = cpu_to_be32(OP_WRITE);
1488
1489         encode_stateid(xdr, args->context);
1490
1491         p = reserve_space(xdr, 16);
1492         p = xdr_encode_hyper(p, args->offset);
1493         *p++ = cpu_to_be32(args->stable);
1494         *p = cpu_to_be32(args->count);
1495
1496         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1497         hdr->nops++;
1498         hdr->replen += decode_write_maxsz;
1499 }
1500
1501 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1502 {
1503         __be32 *p;
1504
1505         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1506
1507         *p++ = cpu_to_be32(OP_DELEGRETURN);
1508         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1509         hdr->nops++;
1510         hdr->replen += decode_delegreturn_maxsz;
1511 }
1512
1513 #if defined(CONFIG_NFS_V4_1)
1514 /* NFSv4.1 operations */
1515 static void encode_exchange_id(struct xdr_stream *xdr,
1516                                struct nfs41_exchange_id_args *args,
1517                                struct compound_hdr *hdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1522         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1523         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1524
1525         encode_string(xdr, args->id_len, args->id);
1526
1527         p = reserve_space(xdr, 12);
1528         *p++ = cpu_to_be32(args->flags);
1529         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1530         *p = cpu_to_be32(0);    /* zero length implementation id array */
1531         hdr->nops++;
1532         hdr->replen += decode_exchange_id_maxsz;
1533 }
1534
1535 static void encode_create_session(struct xdr_stream *xdr,
1536                                   struct nfs41_create_session_args *args,
1537                                   struct compound_hdr *hdr)
1538 {
1539         __be32 *p;
1540         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1541         uint32_t len;
1542         struct nfs_client *clp = args->client;
1543
1544         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1545                         clp->cl_ipaddr);
1546
1547         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1548         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1549         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1550         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1551         *p++ = cpu_to_be32(args->flags);                        /*flags */
1552
1553         /* Fore Channel */
1554         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1555         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1556         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1557         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1558         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1559         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1560         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1561
1562         /* Back Channel */
1563         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1564         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1565         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1566         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1567         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1568         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1569         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1570
1571         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1572         *p++ = cpu_to_be32(1);
1573         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1574
1575         /* authsys_parms rfc1831 */
1576         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1577         p = xdr_encode_opaque(p, machine_name, len);
1578         *p++ = cpu_to_be32(0);                          /* UID */
1579         *p++ = cpu_to_be32(0);                          /* GID */
1580         *p = cpu_to_be32(0);                            /* No more gids */
1581         hdr->nops++;
1582         hdr->replen += decode_create_session_maxsz;
1583 }
1584
1585 static void encode_destroy_session(struct xdr_stream *xdr,
1586                                    struct nfs4_session *session,
1587                                    struct compound_hdr *hdr)
1588 {
1589         __be32 *p;
1590         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1591         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1592         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1593         hdr->nops++;
1594         hdr->replen += decode_destroy_session_maxsz;
1595 }
1596 #endif /* CONFIG_NFS_V4_1 */
1597
1598 static void encode_sequence(struct xdr_stream *xdr,
1599                             const struct nfs4_sequence_args *args,
1600                             struct compound_hdr *hdr)
1601 {
1602 #if defined(CONFIG_NFS_V4_1)
1603         struct nfs4_session *session = args->sa_session;
1604         struct nfs4_slot_table *tp;
1605         struct nfs4_slot *slot;
1606         __be32 *p;
1607
1608         if (!session)
1609                 return;
1610
1611         tp = &session->fc_slot_table;
1612
1613         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1614         slot = tp->slots + args->sa_slotid;
1615
1616         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1617         *p++ = cpu_to_be32(OP_SEQUENCE);
1618
1619         /*
1620          * Sessionid + seqid + slotid + max slotid + cache_this
1621          */
1622         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1623                 "max_slotid=%d cache_this=%d\n",
1624                 __func__,
1625                 ((u32 *)session->sess_id.data)[0],
1626                 ((u32 *)session->sess_id.data)[1],
1627                 ((u32 *)session->sess_id.data)[2],
1628                 ((u32 *)session->sess_id.data)[3],
1629                 slot->seq_nr, args->sa_slotid,
1630                 tp->highest_used_slotid, args->sa_cache_this);
1631         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1632         *p++ = cpu_to_be32(slot->seq_nr);
1633         *p++ = cpu_to_be32(args->sa_slotid);
1634         *p++ = cpu_to_be32(tp->highest_used_slotid);
1635         *p = cpu_to_be32(args->sa_cache_this);
1636         hdr->nops++;
1637         hdr->replen += decode_sequence_maxsz;
1638 #endif /* CONFIG_NFS_V4_1 */
1639 }
1640
1641 /*
1642  * END OF "GENERIC" ENCODE ROUTINES.
1643  */
1644
1645 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1646 {
1647 #if defined(CONFIG_NFS_V4_1)
1648         if (args->sa_session)
1649                 return args->sa_session->clp->cl_minorversion;
1650 #endif /* CONFIG_NFS_V4_1 */
1651         return 0;
1652 }
1653
1654 /*
1655  * Encode an ACCESS request
1656  */
1657 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1658 {
1659         struct xdr_stream xdr;
1660         struct compound_hdr hdr = {
1661                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1662         };
1663
1664         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1665         encode_compound_hdr(&xdr, req, &hdr);
1666         encode_sequence(&xdr, &args->seq_args, &hdr);
1667         encode_putfh(&xdr, args->fh, &hdr);
1668         encode_access(&xdr, args->access, &hdr);
1669         encode_getfattr(&xdr, args->bitmask, &hdr);
1670         encode_nops(&hdr);
1671         return 0;
1672 }
1673
1674 /*
1675  * Encode LOOKUP request
1676  */
1677 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1678 {
1679         struct xdr_stream xdr;
1680         struct compound_hdr hdr = {
1681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1682         };
1683
1684         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1685         encode_compound_hdr(&xdr, req, &hdr);
1686         encode_sequence(&xdr, &args->seq_args, &hdr);
1687         encode_putfh(&xdr, args->dir_fh, &hdr);
1688         encode_lookup(&xdr, args->name, &hdr);
1689         encode_getfh(&xdr, &hdr);
1690         encode_getfattr(&xdr, args->bitmask, &hdr);
1691         encode_nops(&hdr);
1692         return 0;
1693 }
1694
1695 /*
1696  * Encode LOOKUP_ROOT request
1697  */
1698 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1699 {
1700         struct xdr_stream xdr;
1701         struct compound_hdr hdr = {
1702                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1703         };
1704
1705         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1706         encode_compound_hdr(&xdr, req, &hdr);
1707         encode_sequence(&xdr, &args->seq_args, &hdr);
1708         encode_putrootfh(&xdr, &hdr);
1709         encode_getfh(&xdr, &hdr);
1710         encode_getfattr(&xdr, args->bitmask, &hdr);
1711         encode_nops(&hdr);
1712         return 0;
1713 }
1714
1715 /*
1716  * Encode REMOVE request
1717  */
1718 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1719 {
1720         struct xdr_stream xdr;
1721         struct compound_hdr hdr = {
1722                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1723         };
1724
1725         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1726         encode_compound_hdr(&xdr, req, &hdr);
1727         encode_sequence(&xdr, &args->seq_args, &hdr);
1728         encode_putfh(&xdr, args->fh, &hdr);
1729         encode_remove(&xdr, &args->name, &hdr);
1730         encode_getfattr(&xdr, args->bitmask, &hdr);
1731         encode_nops(&hdr);
1732         return 0;
1733 }
1734
1735 /*
1736  * Encode RENAME request
1737  */
1738 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1739 {
1740         struct xdr_stream xdr;
1741         struct compound_hdr hdr = {
1742                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1743         };
1744
1745         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746         encode_compound_hdr(&xdr, req, &hdr);
1747         encode_sequence(&xdr, &args->seq_args, &hdr);
1748         encode_putfh(&xdr, args->old_dir, &hdr);
1749         encode_savefh(&xdr, &hdr);
1750         encode_putfh(&xdr, args->new_dir, &hdr);
1751         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1752         encode_getfattr(&xdr, args->bitmask, &hdr);
1753         encode_restorefh(&xdr, &hdr);
1754         encode_getfattr(&xdr, args->bitmask, &hdr);
1755         encode_nops(&hdr);
1756         return 0;
1757 }
1758
1759 /*
1760  * Encode LINK request
1761  */
1762 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1763 {
1764         struct xdr_stream xdr;
1765         struct compound_hdr hdr = {
1766                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1767         };
1768
1769         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770         encode_compound_hdr(&xdr, req, &hdr);
1771         encode_sequence(&xdr, &args->seq_args, &hdr);
1772         encode_putfh(&xdr, args->fh, &hdr);
1773         encode_savefh(&xdr, &hdr);
1774         encode_putfh(&xdr, args->dir_fh, &hdr);
1775         encode_link(&xdr, args->name, &hdr);
1776         encode_getfattr(&xdr, args->bitmask, &hdr);
1777         encode_restorefh(&xdr, &hdr);
1778         encode_getfattr(&xdr, args->bitmask, &hdr);
1779         encode_nops(&hdr);
1780         return 0;
1781 }
1782
1783 /*
1784  * Encode CREATE request
1785  */
1786 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1787 {
1788         struct xdr_stream xdr;
1789         struct compound_hdr hdr = {
1790                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1791         };
1792
1793         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1794         encode_compound_hdr(&xdr, req, &hdr);
1795         encode_sequence(&xdr, &args->seq_args, &hdr);
1796         encode_putfh(&xdr, args->dir_fh, &hdr);
1797         encode_savefh(&xdr, &hdr);
1798         encode_create(&xdr, args, &hdr);
1799         encode_getfh(&xdr, &hdr);
1800         encode_getfattr(&xdr, args->bitmask, &hdr);
1801         encode_restorefh(&xdr, &hdr);
1802         encode_getfattr(&xdr, args->bitmask, &hdr);
1803         encode_nops(&hdr);
1804         return 0;
1805 }
1806
1807 /*
1808  * Encode SYMLINK request
1809  */
1810 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1811 {
1812         return nfs4_xdr_enc_create(req, p, args);
1813 }
1814
1815 /*
1816  * Encode GETATTR request
1817  */
1818 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1819 {
1820         struct xdr_stream xdr;
1821         struct compound_hdr hdr = {
1822                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1823         };
1824
1825         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1826         encode_compound_hdr(&xdr, req, &hdr);
1827         encode_sequence(&xdr, &args->seq_args, &hdr);
1828         encode_putfh(&xdr, args->fh, &hdr);
1829         encode_getfattr(&xdr, args->bitmask, &hdr);
1830         encode_nops(&hdr);
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode a CLOSE request
1836  */
1837 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1838 {
1839         struct xdr_stream xdr;
1840         struct compound_hdr hdr = {
1841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842         };
1843
1844         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845         encode_compound_hdr(&xdr, req, &hdr);
1846         encode_sequence(&xdr, &args->seq_args, &hdr);
1847         encode_putfh(&xdr, args->fh, &hdr);
1848         encode_close(&xdr, args, &hdr);
1849         encode_getfattr(&xdr, args->bitmask, &hdr);
1850         encode_nops(&hdr);
1851         return 0;
1852 }
1853
1854 /*
1855  * Encode an OPEN request
1856  */
1857 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1858 {
1859         struct xdr_stream xdr;
1860         struct compound_hdr hdr = {
1861                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1862         };
1863
1864         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1865         encode_compound_hdr(&xdr, req, &hdr);
1866         encode_sequence(&xdr, &args->seq_args, &hdr);
1867         encode_putfh(&xdr, args->fh, &hdr);
1868         encode_savefh(&xdr, &hdr);
1869         encode_open(&xdr, args, &hdr);
1870         encode_getfh(&xdr, &hdr);
1871         encode_getfattr(&xdr, args->bitmask, &hdr);
1872         encode_restorefh(&xdr, &hdr);
1873         encode_getfattr(&xdr, args->bitmask, &hdr);
1874         encode_nops(&hdr);
1875         return 0;
1876 }
1877
1878 /*
1879  * Encode an OPEN_CONFIRM request
1880  */
1881 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1882 {
1883         struct xdr_stream xdr;
1884         struct compound_hdr hdr = {
1885                 .nops   = 0,
1886         };
1887
1888         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1889         encode_compound_hdr(&xdr, req, &hdr);
1890         encode_putfh(&xdr, args->fh, &hdr);
1891         encode_open_confirm(&xdr, args, &hdr);
1892         encode_nops(&hdr);
1893         return 0;
1894 }
1895
1896 /*
1897  * Encode an OPEN request with no attributes.
1898  */
1899 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1900 {
1901         struct xdr_stream xdr;
1902         struct compound_hdr hdr = {
1903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1904         };
1905
1906         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1907         encode_compound_hdr(&xdr, req, &hdr);
1908         encode_sequence(&xdr, &args->seq_args, &hdr);
1909         encode_putfh(&xdr, args->fh, &hdr);
1910         encode_open(&xdr, args, &hdr);
1911         encode_getfattr(&xdr, args->bitmask, &hdr);
1912         encode_nops(&hdr);
1913         return 0;
1914 }
1915
1916 /*
1917  * Encode an OPEN_DOWNGRADE request
1918  */
1919 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1924         };
1925
1926         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1927         encode_compound_hdr(&xdr, req, &hdr);
1928         encode_sequence(&xdr, &args->seq_args, &hdr);
1929         encode_putfh(&xdr, args->fh, &hdr);
1930         encode_open_downgrade(&xdr, args, &hdr);
1931         encode_getfattr(&xdr, args->bitmask, &hdr);
1932         encode_nops(&hdr);
1933         return 0;
1934 }
1935
1936 /*
1937  * Encode a LOCK request
1938  */
1939 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1940 {
1941         struct xdr_stream xdr;
1942         struct compound_hdr hdr = {
1943                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1944         };
1945
1946         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1947         encode_compound_hdr(&xdr, req, &hdr);
1948         encode_sequence(&xdr, &args->seq_args, &hdr);
1949         encode_putfh(&xdr, args->fh, &hdr);
1950         encode_lock(&xdr, args, &hdr);
1951         encode_nops(&hdr);
1952         return 0;
1953 }
1954
1955 /*
1956  * Encode a LOCKT request
1957  */
1958 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1963         };
1964
1965         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966         encode_compound_hdr(&xdr, req, &hdr);
1967         encode_sequence(&xdr, &args->seq_args, &hdr);
1968         encode_putfh(&xdr, args->fh, &hdr);
1969         encode_lockt(&xdr, args, &hdr);
1970         encode_nops(&hdr);
1971         return 0;
1972 }
1973
1974 /*
1975  * Encode a LOCKU request
1976  */
1977 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1978 {
1979         struct xdr_stream xdr;
1980         struct compound_hdr hdr = {
1981                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1982         };
1983
1984         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1985         encode_compound_hdr(&xdr, req, &hdr);
1986         encode_sequence(&xdr, &args->seq_args, &hdr);
1987         encode_putfh(&xdr, args->fh, &hdr);
1988         encode_locku(&xdr, args, &hdr);
1989         encode_nops(&hdr);
1990         return 0;
1991 }
1992
1993 /*
1994  * Encode a READLINK request
1995  */
1996 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1997 {
1998         struct xdr_stream xdr;
1999         struct compound_hdr hdr = {
2000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2001         };
2002
2003         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2004         encode_compound_hdr(&xdr, req, &hdr);
2005         encode_sequence(&xdr, &args->seq_args, &hdr);
2006         encode_putfh(&xdr, args->fh, &hdr);
2007         encode_readlink(&xdr, args, req, &hdr);
2008
2009         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2010                         args->pgbase, args->pglen);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  * Encode a READDIR request
2017  */
2018 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026         encode_compound_hdr(&xdr, req, &hdr);
2027         encode_sequence(&xdr, &args->seq_args, &hdr);
2028         encode_putfh(&xdr, args->fh, &hdr);
2029         encode_readdir(&xdr, args, req, &hdr);
2030
2031         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2032                          args->pgbase, args->count);
2033         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2034                         __func__, hdr.replen << 2, args->pages,
2035                         args->pgbase, args->count);
2036         encode_nops(&hdr);
2037         return 0;
2038 }
2039
2040 /*
2041  * Encode a READ request
2042  */
2043 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2044 {
2045         struct xdr_stream xdr;
2046         struct compound_hdr hdr = {
2047                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2048         };
2049
2050         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2051         encode_compound_hdr(&xdr, req, &hdr);
2052         encode_sequence(&xdr, &args->seq_args, &hdr);
2053         encode_putfh(&xdr, args->fh, &hdr);
2054         encode_read(&xdr, args, &hdr);
2055
2056         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2057                          args->pages, args->pgbase, args->count);
2058         req->rq_rcv_buf.flags |= XDRBUF_READ;
2059         encode_nops(&hdr);
2060         return 0;
2061 }
2062
2063 /*
2064  * Encode an SETATTR request
2065  */
2066 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2067 {
2068         struct xdr_stream xdr;
2069         struct compound_hdr hdr = {
2070                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2071         };
2072
2073         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2074         encode_compound_hdr(&xdr, req, &hdr);
2075         encode_sequence(&xdr, &args->seq_args, &hdr);
2076         encode_putfh(&xdr, args->fh, &hdr);
2077         encode_setattr(&xdr, args, args->server, &hdr);
2078         encode_getfattr(&xdr, args->bitmask, &hdr);
2079         encode_nops(&hdr);
2080         return 0;
2081 }
2082
2083 /*
2084  * Encode a GETACL request
2085  */
2086 static int
2087 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2088                 struct nfs_getaclargs *args)
2089 {
2090         struct xdr_stream xdr;
2091         struct compound_hdr hdr = {
2092                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093         };
2094         uint32_t replen;
2095
2096         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2097         encode_compound_hdr(&xdr, req, &hdr);
2098         encode_sequence(&xdr, &args->seq_args, &hdr);
2099         encode_putfh(&xdr, args->fh, &hdr);
2100         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2101         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2102
2103         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2104                 args->acl_pages, args->acl_pgbase, args->acl_len);
2105         encode_nops(&hdr);
2106         return 0;
2107 }
2108
2109 /*
2110  * Encode a WRITE request
2111  */
2112 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2113 {
2114         struct xdr_stream xdr;
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2120         encode_compound_hdr(&xdr, req, &hdr);
2121         encode_sequence(&xdr, &args->seq_args, &hdr);
2122         encode_putfh(&xdr, args->fh, &hdr);
2123         encode_write(&xdr, args, &hdr);
2124         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2125         encode_getfattr(&xdr, args->bitmask, &hdr);
2126         encode_nops(&hdr);
2127         return 0;
2128 }
2129
2130 /*
2131  *  a COMMIT request
2132  */
2133 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2134 {
2135         struct xdr_stream xdr;
2136         struct compound_hdr hdr = {
2137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138         };
2139
2140         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2141         encode_compound_hdr(&xdr, req, &hdr);
2142         encode_sequence(&xdr, &args->seq_args, &hdr);
2143         encode_putfh(&xdr, args->fh, &hdr);
2144         encode_commit(&xdr, args, &hdr);
2145         encode_getfattr(&xdr, args->bitmask, &hdr);
2146         encode_nops(&hdr);
2147         return 0;
2148 }
2149
2150 /*
2151  * FSINFO request
2152  */
2153 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2154 {
2155         struct xdr_stream xdr;
2156         struct compound_hdr hdr = {
2157                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2158         };
2159
2160         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2161         encode_compound_hdr(&xdr, req, &hdr);
2162         encode_sequence(&xdr, &args->seq_args, &hdr);
2163         encode_putfh(&xdr, args->fh, &hdr);
2164         encode_fsinfo(&xdr, args->bitmask, &hdr);
2165         encode_nops(&hdr);
2166         return 0;
2167 }
2168
2169 /*
2170  * a PATHCONF request
2171  */
2172 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2173 {
2174         struct xdr_stream xdr;
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2180         encode_compound_hdr(&xdr, req, &hdr);
2181         encode_sequence(&xdr, &args->seq_args, &hdr);
2182         encode_putfh(&xdr, args->fh, &hdr);
2183         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2184                            &hdr);
2185         encode_nops(&hdr);
2186         return 0;
2187 }
2188
2189 /*
2190  * a STATFS request
2191  */
2192 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2193 {
2194         struct xdr_stream xdr;
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2200         encode_compound_hdr(&xdr, req, &hdr);
2201         encode_sequence(&xdr, &args->seq_args, &hdr);
2202         encode_putfh(&xdr, args->fh, &hdr);
2203         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2204                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2205         encode_nops(&hdr);
2206         return 0;
2207 }
2208
2209 /*
2210  * GETATTR_BITMAP request
2211  */
2212 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2213                                     struct nfs4_server_caps_arg *args)
2214 {
2215         struct xdr_stream xdr;
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2221         encode_compound_hdr(&xdr, req, &hdr);
2222         encode_sequence(&xdr, &args->seq_args, &hdr);
2223         encode_putfh(&xdr, args->fhandle, &hdr);
2224         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2225                            FATTR4_WORD0_LINK_SUPPORT|
2226                            FATTR4_WORD0_SYMLINK_SUPPORT|
2227                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2228         encode_nops(&hdr);
2229         return 0;
2230 }
2231
2232 /*
2233  * a RENEW request
2234  */
2235 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2236 {
2237         struct xdr_stream xdr;
2238         struct compound_hdr hdr = {
2239                 .nops   = 0,
2240         };
2241
2242         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243         encode_compound_hdr(&xdr, req, &hdr);
2244         encode_renew(&xdr, clp, &hdr);
2245         encode_nops(&hdr);
2246         return 0;
2247 }
2248
2249 /*
2250  * a SETCLIENTID request
2251  */
2252 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2253 {
2254         struct xdr_stream xdr;
2255         struct compound_hdr hdr = {
2256                 .nops   = 0,
2257         };
2258
2259         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2260         encode_compound_hdr(&xdr, req, &hdr);
2261         encode_setclientid(&xdr, sc, &hdr);
2262         encode_nops(&hdr);
2263         return 0;
2264 }
2265
2266 /*
2267  * a SETCLIENTID_CONFIRM request
2268  */
2269 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2270 {
2271         struct xdr_stream xdr;
2272         struct compound_hdr hdr = {
2273                 .nops   = 0,
2274         };
2275         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2276
2277         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2278         encode_compound_hdr(&xdr, req, &hdr);
2279         encode_setclientid_confirm(&xdr, clp, &hdr);
2280         encode_putrootfh(&xdr, &hdr);
2281         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2282         encode_nops(&hdr);
2283         return 0;
2284 }
2285
2286 /*
2287  * DELEGRETURN request
2288  */
2289 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2290 {
2291         struct xdr_stream xdr;
2292         struct compound_hdr hdr = {
2293                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294         };
2295
2296         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2297         encode_compound_hdr(&xdr, req, &hdr);
2298         encode_sequence(&xdr, &args->seq_args, &hdr);
2299         encode_putfh(&xdr, args->fhandle, &hdr);
2300         encode_delegreturn(&xdr, args->stateid, &hdr);
2301         encode_getfattr(&xdr, args->bitmask, &hdr);
2302         encode_nops(&hdr);
2303         return 0;
2304 }
2305
2306 /*
2307  * Encode FS_LOCATIONS request
2308  */
2309 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2310 {
2311         struct xdr_stream xdr;
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315         uint32_t replen;
2316
2317         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2318         encode_compound_hdr(&xdr, req, &hdr);
2319         encode_sequence(&xdr, &args->seq_args, &hdr);
2320         encode_putfh(&xdr, args->dir_fh, &hdr);
2321         encode_lookup(&xdr, args->name, &hdr);
2322         replen = hdr.replen;    /* get the attribute into args->page */
2323         encode_fs_locations(&xdr, args->bitmask, &hdr);
2324
2325         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2326                         0, PAGE_SIZE);
2327         encode_nops(&hdr);
2328         return 0;
2329 }
2330
2331 #if defined(CONFIG_NFS_V4_1)
2332 /*
2333  * EXCHANGE_ID request
2334  */
2335 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2336                                     struct nfs41_exchange_id_args *args)
2337 {
2338         struct xdr_stream xdr;
2339         struct compound_hdr hdr = {
2340                 .minorversion = args->client->cl_minorversion,
2341         };
2342
2343         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2344         encode_compound_hdr(&xdr, req, &hdr);
2345         encode_exchange_id(&xdr, args, &hdr);
2346         encode_nops(&hdr);
2347         return 0;
2348 }
2349
2350 /*
2351  * a CREATE_SESSION request
2352  */
2353 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2354                                        struct nfs41_create_session_args *args)
2355 {
2356         struct xdr_stream xdr;
2357         struct compound_hdr hdr = {
2358                 .minorversion = args->client->cl_minorversion,
2359         };
2360
2361         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2362         encode_compound_hdr(&xdr, req, &hdr);
2363         encode_create_session(&xdr, args, &hdr);
2364         encode_nops(&hdr);
2365         return 0;
2366 }
2367
2368 /*
2369  * a DESTROY_SESSION request
2370  */
2371 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2372                                         struct nfs4_session *session)
2373 {
2374         struct xdr_stream xdr;
2375         struct compound_hdr hdr = {
2376                 .minorversion = session->clp->cl_minorversion,
2377         };
2378
2379         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2380         encode_compound_hdr(&xdr, req, &hdr);
2381         encode_destroy_session(&xdr, session, &hdr);
2382         encode_nops(&hdr);
2383         return 0;
2384 }
2385
2386 /*
2387  * a SEQUENCE request
2388  */
2389 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2390                                  struct nfs4_sequence_args *args)
2391 {
2392         struct xdr_stream xdr;
2393         struct compound_hdr hdr = {
2394                 .minorversion = nfs4_xdr_minorversion(args),
2395         };
2396
2397         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2398         encode_compound_hdr(&xdr, req, &hdr);
2399         encode_sequence(&xdr, args, &hdr);
2400         encode_nops(&hdr);
2401         return 0;
2402 }
2403
2404 /*
2405  * a GET_LEASE_TIME request
2406  */
2407 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2408                                        struct nfs4_get_lease_time_args *args)
2409 {
2410         struct xdr_stream xdr;
2411         struct compound_hdr hdr = {
2412                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2413         };
2414         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2415
2416         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2417         encode_compound_hdr(&xdr, req, &hdr);
2418         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2419         encode_putrootfh(&xdr, &hdr);
2420         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2421         encode_nops(&hdr);
2422         return 0;
2423 }
2424 #endif /* CONFIG_NFS_V4_1 */
2425
2426 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2427 {
2428         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2429                 "Remaining buffer length is %tu words.\n",
2430                 func, xdr->end - xdr->p);
2431 }
2432
2433 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2434 {
2435         __be32 *p;
2436
2437         p = xdr_inline_decode(xdr, 4);
2438         if (unlikely(!p))
2439                 goto out_overflow;
2440         *len = be32_to_cpup(p);
2441         p = xdr_inline_decode(xdr, *len);
2442         if (unlikely(!p))
2443                 goto out_overflow;
2444         *string = (char *)p;
2445         return 0;
2446 out_overflow:
2447         print_overflow_msg(__func__, xdr);
2448         return -EIO;
2449 }
2450
2451 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2452 {
2453         __be32 *p;
2454
2455         p = xdr_inline_decode(xdr, 8);
2456         if (unlikely(!p))
2457                 goto out_overflow;
2458         hdr->status = be32_to_cpup(p++);
2459         hdr->taglen = be32_to_cpup(p);
2460
2461         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2462         if (unlikely(!p))
2463                 goto out_overflow;
2464         hdr->tag = (char *)p;
2465         p += XDR_QUADLEN(hdr->taglen);
2466         hdr->nops = be32_to_cpup(p);
2467         if (unlikely(hdr->nops < 1))
2468                 return nfs4_stat_to_errno(hdr->status);
2469         return 0;
2470 out_overflow:
2471         print_overflow_msg(__func__, xdr);
2472         return -EIO;
2473 }
2474
2475 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2476 {
2477         __be32 *p;
2478         uint32_t opnum;
2479         int32_t nfserr;
2480
2481         p = xdr_inline_decode(xdr, 8);
2482         if (unlikely(!p))
2483                 goto out_overflow;
2484         opnum = be32_to_cpup(p++);
2485         if (opnum != expected) {
2486                 dprintk("nfs: Server returned operation"
2487                         " %d but we issued a request for %d\n",
2488                                 opnum, expected);
2489                 return -EIO;
2490         }
2491         nfserr = be32_to_cpup(p);
2492         if (nfserr != NFS_OK)
2493                 return nfs4_stat_to_errno(nfserr);
2494         return 0;
2495 out_overflow:
2496         print_overflow_msg(__func__, xdr);
2497         return -EIO;
2498 }
2499
2500 /* Dummy routine */
2501 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2502 {
2503         __be32 *p;
2504         unsigned int strlen;
2505         char *str;
2506
2507         p = xdr_inline_decode(xdr, 12);
2508         if (likely(p))
2509                 return decode_opaque_inline(xdr, &strlen, &str);
2510         print_overflow_msg(__func__, xdr);
2511         return -EIO;
2512 }
2513
2514 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2515 {
2516         uint32_t bmlen;
2517         __be32 *p;
2518
2519         p = xdr_inline_decode(xdr, 4);
2520         if (unlikely(!p))
2521                 goto out_overflow;
2522         bmlen = be32_to_cpup(p);
2523
2524         bitmap[0] = bitmap[1] = 0;
2525         p = xdr_inline_decode(xdr, (bmlen << 2));
2526         if (unlikely(!p))
2527                 goto out_overflow;
2528         if (bmlen > 0) {
2529                 bitmap[0] = be32_to_cpup(p++);
2530                 if (bmlen > 1)
2531                         bitmap[1] = be32_to_cpup(p);
2532         }
2533         return 0;
2534 out_overflow:
2535         print_overflow_msg(__func__, xdr);
2536         return -EIO;
2537 }
2538
2539 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2540 {
2541         __be32 *p;
2542
2543         p = xdr_inline_decode(xdr, 4);
2544         if (unlikely(!p))
2545                 goto out_overflow;
2546         *attrlen = be32_to_cpup(p);
2547         *savep = xdr->p;
2548         return 0;
2549 out_overflow:
2550         print_overflow_msg(__func__, xdr);
2551         return -EIO;
2552 }
2553
2554 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2555 {
2556         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2557                 decode_attr_bitmap(xdr, bitmask);
2558                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2559         } else
2560                 bitmask[0] = bitmask[1] = 0;
2561         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2562         return 0;
2563 }
2564
2565 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2566 {
2567         __be32 *p;
2568         int ret = 0;
2569
2570         *type = 0;
2571         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2572                 return -EIO;
2573         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2574                 p = xdr_inline_decode(xdr, 4);
2575                 if (unlikely(!p))
2576                         goto out_overflow;
2577                 *type = be32_to_cpup(p);
2578                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2579                         dprintk("%s: bad type %d\n", __func__, *type);
2580                         return -EIO;
2581                 }
2582                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2583                 ret = NFS_ATTR_FATTR_TYPE;
2584         }
2585         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2586         return ret;
2587 out_overflow:
2588         print_overflow_msg(__func__, xdr);
2589         return -EIO;
2590 }
2591
2592 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2593 {
2594         __be32 *p;
2595         int ret = 0;
2596
2597         *change = 0;
2598         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2599                 return -EIO;
2600         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2601                 p = xdr_inline_decode(xdr, 8);
2602                 if (unlikely(!p))
2603                         goto out_overflow;
2604                 xdr_decode_hyper(p, change);
2605                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2606                 ret = NFS_ATTR_FATTR_CHANGE;
2607         }
2608         dprintk("%s: change attribute=%Lu\n", __func__,
2609                         (unsigned long long)*change);
2610         return ret;
2611 out_overflow:
2612         print_overflow_msg(__func__, xdr);
2613         return -EIO;
2614 }
2615
2616 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2617 {
2618         __be32 *p;
2619         int ret = 0;
2620
2621         *size = 0;
2622         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2623                 return -EIO;
2624         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2625                 p = xdr_inline_decode(xdr, 8);
2626                 if (unlikely(!p))
2627                         goto out_overflow;
2628                 xdr_decode_hyper(p, size);
2629                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2630                 ret = NFS_ATTR_FATTR_SIZE;
2631         }
2632         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2633         return ret;
2634 out_overflow:
2635         print_overflow_msg(__func__, xdr);
2636         return -EIO;
2637 }
2638
2639 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2640 {
2641         __be32 *p;
2642
2643         *res = 0;
2644         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2645                 return -EIO;
2646         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2647                 p = xdr_inline_decode(xdr, 4);
2648                 if (unlikely(!p))
2649                         goto out_overflow;
2650                 *res = be32_to_cpup(p);
2651                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2652         }
2653         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2654         return 0;
2655 out_overflow:
2656         print_overflow_msg(__func__, xdr);
2657         return -EIO;
2658 }
2659
2660 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2661 {
2662         __be32 *p;
2663
2664         *res = 0;
2665         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2666                 return -EIO;
2667         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2668                 p = xdr_inline_decode(xdr, 4);
2669                 if (unlikely(!p))
2670                         goto out_overflow;
2671                 *res = be32_to_cpup(p);
2672                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2673         }
2674         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2675         return 0;
2676 out_overflow:
2677         print_overflow_msg(__func__, xdr);
2678         return -EIO;
2679 }
2680
2681 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2682 {
2683         __be32 *p;
2684         int ret = 0;
2685
2686         fsid->major = 0;
2687         fsid->minor = 0;
2688         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2689                 return -EIO;
2690         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2691                 p = xdr_inline_decode(xdr, 16);
2692                 if (unlikely(!p))
2693                         goto out_overflow;
2694                 p = xdr_decode_hyper(p, &fsid->major);
2695                 xdr_decode_hyper(p, &fsid->minor);
2696                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2697                 ret = NFS_ATTR_FATTR_FSID;
2698         }
2699         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2700                         (unsigned long long)fsid->major,
2701                         (unsigned long long)fsid->minor);
2702         return ret;
2703 out_overflow:
2704         print_overflow_msg(__func__, xdr);
2705         return -EIO;
2706 }
2707
2708 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2709 {
2710         __be32 *p;
2711
2712         *res = 60;
2713         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2714                 return -EIO;
2715         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2716                 p = xdr_inline_decode(xdr, 4);
2717                 if (unlikely(!p))
2718                         goto out_overflow;
2719                 *res = be32_to_cpup(p);
2720                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2721         }
2722         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2723         return 0;
2724 out_overflow:
2725         print_overflow_msg(__func__, xdr);
2726         return -EIO;
2727 }
2728
2729 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2730 {
2731         __be32 *p;
2732
2733         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2734         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2735                 return -EIO;
2736         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2737                 p = xdr_inline_decode(xdr, 4);
2738                 if (unlikely(!p))
2739                         goto out_overflow;
2740                 *res = be32_to_cpup(p);
2741                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2742         }
2743         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2744         return 0;
2745 out_overflow:
2746         print_overflow_msg(__func__, xdr);
2747         return -EIO;
2748 }
2749
2750 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2751 {
2752         __be32 *p;
2753         int ret = 0;
2754
2755         *fileid = 0;
2756         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2757                 return -EIO;
2758         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2759                 p = xdr_inline_decode(xdr, 8);
2760                 if (unlikely(!p))
2761                         goto out_overflow;
2762                 xdr_decode_hyper(p, fileid);
2763                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2764                 ret = NFS_ATTR_FATTR_FILEID;
2765         }
2766         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2767         return ret;
2768 out_overflow:
2769         print_overflow_msg(__func__, xdr);
2770         return -EIO;
2771 }
2772
2773 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2774 {
2775         __be32 *p;
2776         int ret = 0;
2777
2778         *fileid = 0;
2779         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2780                 return -EIO;
2781         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2782                 p = xdr_inline_decode(xdr, 8);
2783                 if (unlikely(!p))
2784                         goto out_overflow;
2785                 xdr_decode_hyper(p, fileid);
2786                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2787                 ret = NFS_ATTR_FATTR_FILEID;
2788         }
2789         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2790         return ret;
2791 out_overflow:
2792         print_overflow_msg(__func__, xdr);
2793         return -EIO;
2794 }
2795
2796 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2797 {
2798         __be32 *p;
2799         int status = 0;
2800
2801         *res = 0;
2802         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2803                 return -EIO;
2804         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2805                 p = xdr_inline_decode(xdr, 8);
2806                 if (unlikely(!p))
2807                         goto out_overflow;
2808                 xdr_decode_hyper(p, res);
2809                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2810         }
2811         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2812         return status;
2813 out_overflow:
2814         print_overflow_msg(__func__, xdr);
2815         return -EIO;
2816 }
2817
2818 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2819 {
2820         __be32 *p;
2821         int status = 0;
2822
2823         *res = 0;
2824         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2825                 return -EIO;
2826         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2827                 p = xdr_inline_decode(xdr, 8);
2828                 if (unlikely(!p))
2829                         goto out_overflow;
2830                 xdr_decode_hyper(p, res);
2831                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2832         }
2833         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2834         return status;
2835 out_overflow:
2836         print_overflow_msg(__func__, xdr);
2837         return -EIO;
2838 }
2839
2840 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2841 {
2842         __be32 *p;
2843         int status = 0;
2844
2845         *res = 0;
2846         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2847                 return -EIO;
2848         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2849                 p = xdr_inline_decode(xdr, 8);
2850                 if (unlikely(!p))
2851                         goto out_overflow;
2852                 xdr_decode_hyper(p, res);
2853                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2854         }
2855         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2856         return status;
2857 out_overflow:
2858         print_overflow_msg(__func__, xdr);
2859         return -EIO;
2860 }
2861
2862 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2863 {
2864         u32 n;
2865         __be32 *p;
2866         int status = 0;
2867
2868         p = xdr_inline_decode(xdr, 4);
2869         if (unlikely(!p))
2870                 goto out_overflow;
2871         n = be32_to_cpup(p);
2872         if (n == 0)
2873                 goto root_path;
2874         dprintk("path ");
2875         path->ncomponents = 0;
2876         while (path->ncomponents < n) {
2877                 struct nfs4_string *component = &path->components[path->ncomponents];
2878                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2879                 if (unlikely(status != 0))
2880                         goto out_eio;
2881                 if (path->ncomponents != n)
2882                         dprintk("/");
2883                 dprintk("%s", component->data);
2884                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2885                         path->ncomponents++;
2886                 else {
2887                         dprintk("cannot parse %d components in path\n", n);
2888                         goto out_eio;
2889                 }
2890         }
2891 out:
2892         dprintk("\n");
2893         return status;
2894 root_path:
2895 /* a root pathname is sent as a zero component4 */
2896         path->ncomponents = 1;
2897         path->components[0].len=0;
2898         path->components[0].data=NULL;
2899         dprintk("path /\n");
2900         goto out;
2901 out_eio:
2902         dprintk(" status %d", status);
2903         status = -EIO;
2904         goto out;
2905 out_overflow:
2906         print_overflow_msg(__func__, xdr);
2907         return -EIO;
2908 }
2909
2910 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2911 {
2912         int n;
2913         __be32 *p;
2914         int status = -EIO;
2915
2916         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2917                 goto out;
2918         status = 0;
2919         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2920                 goto out;
2921         dprintk("%s: fsroot ", __func__);
2922         status = decode_pathname(xdr, &res->fs_path);
2923         if (unlikely(status != 0))
2924                 goto out;
2925         p = xdr_inline_decode(xdr, 4);
2926         if (unlikely(!p))
2927                 goto out_overflow;
2928         n = be32_to_cpup(p);
2929         if (n <= 0)
2930                 goto out_eio;
2931         res->nlocations = 0;
2932         while (res->nlocations < n) {
2933                 u32 m;
2934                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2935
2936                 p = xdr_inline_decode(xdr, 4);
2937                 if (unlikely(!p))
2938                         goto out_overflow;
2939                 m = be32_to_cpup(p);
2940
2941                 loc->nservers = 0;
2942                 dprintk("%s: servers ", __func__);
2943                 while (loc->nservers < m) {
2944                         struct nfs4_string *server = &loc->servers[loc->nservers];
2945                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2946                         if (unlikely(status != 0))
2947                                 goto out_eio;
2948                         dprintk("%s ", server->data);
2949                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2950                                 loc->nservers++;
2951                         else {
2952                                 unsigned int i;
2953                                 dprintk("%s: using first %u of %u servers "
2954                                         "returned for location %u\n",
2955                                                 __func__,
2956                                                 NFS4_FS_LOCATION_MAXSERVERS,
2957                                                 m, res->nlocations);
2958                                 for (i = loc->nservers; i < m; i++) {
2959                                         unsigned int len;
2960                                         char *data;
2961                                         status = decode_opaque_inline(xdr, &len, &data);
2962                                         if (unlikely(status != 0))
2963                                                 goto out_eio;
2964                                 }
2965                         }
2966                 }
2967                 status = decode_pathname(xdr, &loc->rootpath);
2968                 if (unlikely(status != 0))
2969                         goto out_eio;
2970                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2971                         res->nlocations++;
2972         }
2973         if (res->nlocations != 0)
2974                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2975 out:
2976         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2977         return status;
2978 out_overflow:
2979         print_overflow_msg(__func__, xdr);
2980 out_eio:
2981         status = -EIO;
2982         goto out;
2983 }
2984
2985 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2986 {
2987         __be32 *p;
2988         int status = 0;
2989
2990         *res = 0;
2991         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2992                 return -EIO;
2993         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2994                 p = xdr_inline_decode(xdr, 8);
2995                 if (unlikely(!p))
2996                         goto out_overflow;
2997                 xdr_decode_hyper(p, res);
2998                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2999         }
3000         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3001         return status;
3002 out_overflow:
3003         print_overflow_msg(__func__, xdr);
3004         return -EIO;
3005 }
3006
3007 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3008 {
3009         __be32 *p;
3010         int status = 0;
3011
3012         *maxlink = 1;
3013         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3014                 return -EIO;
3015         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3016                 p = xdr_inline_decode(xdr, 4);
3017                 if (unlikely(!p))
3018                         goto out_overflow;
3019                 *maxlink = be32_to_cpup(p);
3020                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3021         }
3022         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3023         return status;
3024 out_overflow:
3025         print_overflow_msg(__func__, xdr);
3026         return -EIO;
3027 }
3028
3029 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3030 {
3031         __be32 *p;
3032         int status = 0;
3033
3034         *maxname = 1024;
3035         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3036                 return -EIO;
3037         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3038                 p = xdr_inline_decode(xdr, 4);
3039                 if (unlikely(!p))
3040                         goto out_overflow;
3041                 *maxname = be32_to_cpup(p);
3042                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3043         }
3044         dprintk("%s: maxname=%u\n", __func__, *maxname);
3045         return status;
3046 out_overflow:
3047         print_overflow_msg(__func__, xdr);
3048         return -EIO;
3049 }
3050
3051 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3052 {
3053         __be32 *p;
3054         int status = 0;
3055
3056         *res = 1024;
3057         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3058                 return -EIO;
3059         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3060                 uint64_t maxread;
3061                 p = xdr_inline_decode(xdr, 8);
3062                 if (unlikely(!p))
3063                         goto out_overflow;
3064                 xdr_decode_hyper(p, &maxread);
3065                 if (maxread > 0x7FFFFFFF)
3066                         maxread = 0x7FFFFFFF;
3067                 *res = (uint32_t)maxread;
3068                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3069         }
3070         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3071         return status;
3072 out_overflow:
3073         print_overflow_msg(__func__, xdr);
3074         return -EIO;
3075 }
3076
3077 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3078 {
3079         __be32 *p;
3080         int status = 0;
3081
3082         *res = 1024;
3083         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3084                 return -EIO;
3085         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3086                 uint64_t maxwrite;
3087                 p = xdr_inline_decode(xdr, 8);
3088                 if (unlikely(!p))
3089                         goto out_overflow;
3090                 xdr_decode_hyper(p, &maxwrite);
3091                 if (maxwrite > 0x7FFFFFFF)
3092                         maxwrite = 0x7FFFFFFF;
3093                 *res = (uint32_t)maxwrite;
3094                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3095         }
3096         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3097         return status;
3098 out_overflow:
3099         print_overflow_msg(__func__, xdr);
3100         return -EIO;
3101 }
3102
3103 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3104 {
3105         uint32_t tmp;
3106         __be32 *p;
3107         int ret = 0;
3108
3109         *mode = 0;
3110         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3111                 return -EIO;
3112         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3113                 p = xdr_inline_decode(xdr, 4);
3114                 if (unlikely(!p))
3115                         goto out_overflow;
3116                 tmp = be32_to_cpup(p);
3117                 *mode = tmp & ~S_IFMT;
3118                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3119                 ret = NFS_ATTR_FATTR_MODE;
3120         }
3121         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3122         return ret;
3123 out_overflow:
3124         print_overflow_msg(__func__, xdr);
3125         return -EIO;
3126 }
3127
3128 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3129 {
3130         __be32 *p;
3131         int ret = 0;
3132
3133         *nlink = 1;
3134         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3135                 return -EIO;
3136         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3137                 p = xdr_inline_decode(xdr, 4);
3138                 if (unlikely(!p))
3139                         goto out_overflow;
3140                 *nlink = be32_to_cpup(p);
3141                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3142                 ret = NFS_ATTR_FATTR_NLINK;
3143         }
3144         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3145         return ret;
3146 out_overflow:
3147         print_overflow_msg(__func__, xdr);
3148         return -EIO;
3149 }
3150
3151 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3152                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3153 {
3154         uint32_t len;
3155         __be32 *p;
3156         int ret = 0;
3157
3158         *uid = -2;
3159         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3160                 return -EIO;
3161         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3162                 p = xdr_inline_decode(xdr, 4);
3163                 if (unlikely(!p))
3164                         goto out_overflow;
3165                 len = be32_to_cpup(p);
3166                 p = xdr_inline_decode(xdr, len);
3167                 if (unlikely(!p))
3168                         goto out_overflow;
3169                 if (!may_sleep) {
3170                         /* do nothing */
3171                 } else if (len < XDR_MAX_NETOBJ) {
3172                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3173                                 ret = NFS_ATTR_FATTR_OWNER;
3174                         else
3175                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3176                                                 __func__);
3177                 } else
3178                         dprintk("%s: name too long (%u)!\n",
3179                                         __func__, len);
3180                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3181         }
3182         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3183         return ret;
3184 out_overflow:
3185         print_overflow_msg(__func__, xdr);
3186         return -EIO;
3187 }
3188
3189 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3190                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3191 {
3192         uint32_t len;
3193         __be32 *p;
3194         int ret = 0;
3195
3196         *gid = -2;
3197         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3198                 return -EIO;
3199         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3200                 p = xdr_inline_decode(xdr, 4);
3201                 if (unlikely(!p))
3202                         goto out_overflow;
3203                 len = be32_to_cpup(p);
3204                 p = xdr_inline_decode(xdr, len);
3205                 if (unlikely(!p))
3206                         goto out_overflow;
3207                 if (!may_sleep) {
3208                         /* do nothing */
3209                 } else if (len < XDR_MAX_NETOBJ) {
3210                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3211                                 ret = NFS_ATTR_FATTR_GROUP;
3212                         else
3213                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3214                                                 __func__);
3215                 } else
3216                         dprintk("%s: name too long (%u)!\n",
3217                                         __func__, len);
3218                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3219         }
3220         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3221         return ret;
3222 out_overflow:
3223         print_overflow_msg(__func__, xdr);
3224         return -EIO;
3225 }
3226
3227 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3228 {
3229         uint32_t major = 0, minor = 0;
3230         __be32 *p;
3231         int ret = 0;
3232
3233         *rdev = MKDEV(0,0);
3234         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3235                 return -EIO;
3236         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3237                 dev_t tmp;
3238
3239                 p = xdr_inline_decode(xdr, 8);
3240                 if (unlikely(!p))
3241                         goto out_overflow;
3242                 major = be32_to_cpup(p++);
3243                 minor = be32_to_cpup(p);
3244                 tmp = MKDEV(major, minor);
3245                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3246                         *rdev = tmp;
3247                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3248                 ret = NFS_ATTR_FATTR_RDEV;
3249         }
3250         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3251         return ret;
3252 out_overflow:
3253         print_overflow_msg(__func__, xdr);
3254         return -EIO;
3255 }
3256
3257 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3258 {
3259         __be32 *p;
3260         int status = 0;
3261
3262         *res = 0;
3263         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3264                 return -EIO;
3265         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3266                 p = xdr_inline_decode(xdr, 8);
3267                 if (unlikely(!p))
3268                         goto out_overflow;
3269                 xdr_decode_hyper(p, res);
3270                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3271         }
3272         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3273         return status;
3274 out_overflow:
3275         print_overflow_msg(__func__, xdr);
3276         return -EIO;
3277 }
3278
3279 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3280 {
3281         __be32 *p;
3282         int status = 0;
3283
3284         *res = 0;
3285         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3286                 return -EIO;
3287         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3288                 p = xdr_inline_decode(xdr, 8);
3289                 if (unlikely(!p))
3290                         goto out_overflow;
3291                 xdr_decode_hyper(p, res);
3292                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3293         }
3294         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3295         return status;
3296 out_overflow:
3297         print_overflow_msg(__func__, xdr);
3298         return -EIO;
3299 }
3300
3301 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3302 {
3303         __be32 *p;
3304         int status = 0;
3305
3306         *res = 0;
3307         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3308                 return -EIO;
3309         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3310                 p = xdr_inline_decode(xdr, 8);
3311                 if (unlikely(!p))
3312                         goto out_overflow;
3313                 xdr_decode_hyper(p, res);
3314                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3315         }
3316         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3317         return status;
3318 out_overflow:
3319         print_overflow_msg(__func__, xdr);
3320         return -EIO;
3321 }
3322
3323 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3324 {
3325         __be32 *p;
3326         int ret = 0;
3327
3328         *used = 0;
3329         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3330                 return -EIO;
3331         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3332                 p = xdr_inline_decode(xdr, 8);
3333                 if (unlikely(!p))
3334                         goto out_overflow;
3335                 xdr_decode_hyper(p, used);
3336                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3337                 ret = NFS_ATTR_FATTR_SPACE_USED;
3338         }
3339         dprintk("%s: space used=%Lu\n", __func__,
3340                         (unsigned long long)*used);
3341         return ret;
3342 out_overflow:
3343         print_overflow_msg(__func__, xdr);
3344         return -EIO;
3345 }
3346
3347 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3348 {
3349         __be32 *p;
3350         uint64_t sec;
3351         uint32_t nsec;
3352
3353         p = xdr_inline_decode(xdr, 12);
3354         if (unlikely(!p))
3355                 goto out_overflow;
3356         p = xdr_decode_hyper(p, &sec);
3357         nsec = be32_to_cpup(p);
3358         time->tv_sec = (time_t)sec;
3359         time->tv_nsec = (long)nsec;
3360         return 0;
3361 out_overflow:
3362         print_overflow_msg(__func__, xdr);
3363         return -EIO;
3364 }
3365
3366 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3367 {
3368         int status = 0;
3369
3370         time->tv_sec = 0;
3371         time->tv_nsec = 0;
3372         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3373                 return -EIO;
3374         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3375                 status = decode_attr_time(xdr, time);
3376                 if (status == 0)
3377                         status = NFS_ATTR_FATTR_ATIME;
3378                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3379         }
3380         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3381         return status;
3382 }
3383
3384 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3385 {
3386         int status = 0;
3387
3388         time->tv_sec = 0;
3389         time->tv_nsec = 0;
3390         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3391                 return -EIO;
3392         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3393                 status = decode_attr_time(xdr, time);
3394                 if (status == 0)
3395                         status = NFS_ATTR_FATTR_CTIME;
3396                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3397         }
3398         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3399         return status;
3400 }
3401
3402 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3403 {
3404         int status = 0;
3405
3406         time->tv_sec = 0;
3407         time->tv_nsec = 0;
3408         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3409                 return -EIO;
3410         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3411                 status = decode_attr_time(xdr, time);
3412                 if (status == 0)
3413                         status = NFS_ATTR_FATTR_MTIME;
3414                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3415         }
3416         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3417         return status;
3418 }
3419
3420 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3421 {
3422         unsigned int attrwords = XDR_QUADLEN(attrlen);
3423         unsigned int nwords = xdr->p - savep;
3424
3425         if (unlikely(attrwords != nwords)) {
3426                 dprintk("%s: server returned incorrect attribute length: "
3427                         "%u %c %u\n",
3428                                 __func__,
3429                                 attrwords << 2,
3430                                 (attrwords < nwords) ? '<' : '>',
3431                                 nwords << 2);
3432                 return -EIO;
3433         }
3434         return 0;
3435 }
3436
3437 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3438 {
3439         __be32 *p;
3440
3441         p = xdr_inline_decode(xdr, 20);
3442         if (unlikely(!p))
3443                 goto out_overflow;
3444         cinfo->atomic = be32_to_cpup(p++);
3445         p = xdr_decode_hyper(p, &cinfo->before);
3446         xdr_decode_hyper(p, &cinfo->after);
3447         return 0;
3448 out_overflow:
3449         print_overflow_msg(__func__, xdr);
3450         return -EIO;
3451 }
3452
3453 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3454 {
3455         __be32 *p;
3456         uint32_t supp, acc;
3457         int status;
3458
3459         status = decode_op_hdr(xdr, OP_ACCESS);
3460         if (status)
3461                 return status;
3462         p = xdr_inline_decode(xdr, 8);
3463         if (unlikely(!p))
3464                 goto out_overflow;
3465         supp = be32_to_cpup(p++);
3466         acc = be32_to_cpup(p);
3467         access->supported = supp;
3468         access->access = acc;
3469         return 0;
3470 out_overflow:
3471         print_overflow_msg(__func__, xdr);
3472         return -EIO;
3473 }
3474
3475 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3476 {
3477         __be32 *p;
3478
3479         p = xdr_inline_decode(xdr, len);
3480         if (likely(p)) {
3481                 memcpy(buf, p, len);
3482                 return 0;
3483         }
3484         print_overflow_msg(__func__, xdr);
3485         return -EIO;
3486 }
3487
3488 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3489 {
3490         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3491 }
3492
3493 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3494 {
3495         int status;
3496
3497         status = decode_op_hdr(xdr, OP_CLOSE);
3498         if (status != -EIO)
3499                 nfs_increment_open_seqid(status, res->seqid);
3500         if (!status)
3501                 status = decode_stateid(xdr, &res->stateid);
3502         return status;
3503 }
3504
3505 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3506 {
3507         return decode_opaque_fixed(xdr, verifier, 8);
3508 }
3509
3510 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3511 {
3512         int status;
3513
3514         status = decode_op_hdr(xdr, OP_COMMIT);
3515         if (!status)
3516                 status = decode_verifier(xdr, res->verf->verifier);
3517         return status;
3518 }
3519
3520 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3521 {
3522         __be32 *p;
3523         uint32_t bmlen;
3524         int status;
3525
3526         status = decode_op_hdr(xdr, OP_CREATE);
3527         if (status)
3528                 return status;
3529         if ((status = decode_change_info(xdr, cinfo)))
3530                 return status;
3531         p = xdr_inline_decode(xdr, 4);
3532         if (unlikely(!p))
3533                 goto out_overflow;
3534         bmlen = be32_to_cpup(p);
3535         p = xdr_inline_decode(xdr, bmlen << 2);
3536         if (likely(p))
3537                 return 0;
3538 out_overflow:
3539         print_overflow_msg(__func__, xdr);
3540         return -EIO;
3541 }
3542
3543 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3544 {
3545         __be32 *savep;
3546         uint32_t attrlen, bitmap[2] = {0};
3547         int status;
3548
3549         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3550                 goto xdr_error;
3551         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3552                 goto xdr_error;
3553         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3554                 goto xdr_error;
3555         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3556                 goto xdr_error;
3557         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3558                 goto xdr_error;
3559         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3560                 goto xdr_error;
3561         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3562                 goto xdr_error;
3563         status = verify_attr_len(xdr, savep, attrlen);
3564 xdr_error:
3565         dprintk("%s: xdr returned %d!\n", __func__, -status);
3566         return status;
3567 }
3568
3569 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3570 {
3571         __be32 *savep;
3572         uint32_t attrlen, bitmap[2] = {0};
3573         int status;
3574
3575         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3576                 goto xdr_error;
3577         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3578                 goto xdr_error;
3579         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3580                 goto xdr_error;
3581
3582         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3583                 goto xdr_error;
3584         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3585                 goto xdr_error;
3586         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3587                 goto xdr_error;
3588         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3589                 goto xdr_error;
3590         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3591                 goto xdr_error;
3592         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3593                 goto xdr_error;
3594
3595         status = verify_attr_len(xdr, savep, attrlen);
3596 xdr_error:
3597         dprintk("%s: xdr returned %d!\n", __func__, -status);
3598         return status;
3599 }
3600
3601 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3602 {
3603         __be32 *savep;
3604         uint32_t attrlen, bitmap[2] = {0};
3605         int status;
3606
3607         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3608                 goto xdr_error;
3609         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3610                 goto xdr_error;
3611         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3612                 goto xdr_error;
3613
3614         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3615                 goto xdr_error;
3616         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3617                 goto xdr_error;
3618
3619         status = verify_attr_len(xdr, savep, attrlen);
3620 xdr_error:
3621         dprintk("%s: xdr returned %d!\n", __func__, -status);
3622         return status;
3623 }
3624
3625 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3626                 const struct nfs_server *server, int may_sleep)
3627 {
3628         __be32 *savep;
3629         uint32_t attrlen,
3630                  bitmap[2] = {0},
3631                  type;
3632         int status;
3633         umode_t fmode = 0;
3634         uint64_t fileid;
3635
3636         status = decode_op_hdr(xdr, OP_GETATTR);
3637         if (status < 0)
3638                 goto xdr_error;
3639
3640         status = decode_attr_bitmap(xdr, bitmap);
3641         if (status < 0)
3642                 goto xdr_error;
3643
3644         status = decode_attr_length(xdr, &attrlen, &savep);
3645         if (status < 0)
3646                 goto xdr_error;
3647
3648
3649         status = decode_attr_type(xdr, bitmap, &type);
3650         if (status < 0)
3651                 goto xdr_error;
3652         fattr->mode = 0;
3653         if (status != 0) {
3654                 fattr->mode |= nfs_type2fmt[type];
3655                 fattr->valid |= status;
3656         }
3657
3658         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3659         if (status < 0)
3660                 goto xdr_error;
3661         fattr->valid |= status;
3662
3663         status = decode_attr_size(xdr, bitmap, &fattr->size);
3664         if (status < 0)
3665                 goto xdr_error;
3666         fattr->valid |= status;
3667
3668         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3669         if (status < 0)
3670                 goto xdr_error;
3671         fattr->valid |= status;
3672
3673         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3674         if (status < 0)
3675                 goto xdr_error;
3676         fattr->valid |= status;
3677
3678         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3679                                                 struct nfs4_fs_locations,
3680                                                 fattr));
3681         if (status < 0)
3682                 goto xdr_error;
3683         fattr->valid |= status;
3684
3685         status = decode_attr_mode(xdr, bitmap, &fmode);
3686         if (status < 0)
3687                 goto xdr_error;
3688         if (status != 0) {
3689                 fattr->mode |= fmode;
3690                 fattr->valid |= status;
3691         }
3692
3693         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3694         if (status < 0)
3695                 goto xdr_error;
3696         fattr->valid |= status;
3697
3698         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3699                         &fattr->uid, may_sleep);
3700         if (status < 0)
3701                 goto xdr_error;
3702         fattr->valid |= status;
3703
3704         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3705                         &fattr->gid, may_sleep);
3706         if (status < 0)
3707                 goto xdr_error;
3708         fattr->valid |= status;
3709
3710         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3711         if (status < 0)
3712                 goto xdr_error;
3713         fattr->valid |= status;
3714
3715         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3716         if (status < 0)
3717                 goto xdr_error;
3718         fattr->valid |= status;
3719
3720         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3721         if (status < 0)
3722                 goto xdr_error;
3723         fattr->valid |= status;
3724
3725         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3726         if (status < 0)
3727                 goto xdr_error;
3728         fattr->valid |= status;
3729
3730         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3731         if (status < 0)
3732                 goto xdr_error;
3733         fattr->valid |= status;
3734
3735         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3736         if (status < 0)
3737                 goto xdr_error;
3738         if (status != 0 && !(fattr->valid & status)) {
3739                 fattr->fileid = fileid;
3740                 fattr->valid |= status;
3741         }
3742
3743         status = verify_attr_len(xdr, savep, attrlen);
3744 xdr_error:
3745         dprintk("%s: xdr returned %d\n", __func__, -status);
3746         return status;
3747 }
3748
3749
3750 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3751 {
3752         __be32 *savep;
3753         uint32_t attrlen, bitmap[2];
3754         int status;
3755
3756         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3757                 goto xdr_error;
3758         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3759                 goto xdr_error;
3760         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3761                 goto xdr_error;
3762
3763         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3764
3765         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3766                 goto xdr_error;
3767         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3768                 goto xdr_error;
3769         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3770                 goto xdr_error;
3771         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3772         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3773                 goto xdr_error;
3774         fsinfo->wtpref = fsinfo->wtmax;
3775
3776         status = verify_attr_len(xdr, savep, attrlen);
3777 xdr_error:
3778         dprintk("%s: xdr returned %d!\n", __func__, -status);
3779         return status;
3780 }
3781
3782 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3783 {
3784         __be32 *p;
3785         uint32_t len;
3786         int status;
3787
3788         /* Zero handle first to allow comparisons */
3789         memset(fh, 0, sizeof(*fh));
3790
3791         status = decode_op_hdr(xdr, OP_GETFH);
3792         if (status)
3793                 return status;
3794
3795         p = xdr_inline_decode(xdr, 4);
3796         if (unlikely(!p))
3797                 goto out_overflow;
3798         len = be32_to_cpup(p);
3799         if (len > NFS4_FHSIZE)
3800                 return -EIO;
3801         fh->size = len;
3802         p = xdr_inline_decode(xdr, len);
3803         if (unlikely(!p))
3804                 goto out_overflow;
3805         memcpy(fh->data, p, len);
3806         return 0;
3807 out_overflow:
3808         print_overflow_msg(__func__, xdr);
3809         return -EIO;
3810 }
3811
3812 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3813 {
3814         int status;
3815
3816         status = decode_op_hdr(xdr, OP_LINK);
3817         if (status)
3818                 return status;
3819         return decode_change_info(xdr, cinfo);
3820 }
3821
3822 /*
3823  * We create the owner, so we know a proper owner.id length is 4.
3824  */
3825 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3826 {
3827         uint64_t offset, length, clientid;
3828         __be32 *p;
3829         uint32_t namelen, type;
3830
3831         p = xdr_inline_decode(xdr, 32);
3832         if (unlikely(!p))
3833                 goto out_overflow;
3834         p = xdr_decode_hyper(p, &offset);
3835         p = xdr_decode_hyper(p, &length);
3836         type = be32_to_cpup(p++);
3837         if (fl != NULL) {
3838                 fl->fl_start = (loff_t)offset;
3839                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3840                 if (length == ~(uint64_t)0)
3841                         fl->fl_end = OFFSET_MAX;
3842                 fl->fl_type = F_WRLCK;
3843                 if (type & 1)
3844                         fl->fl_type = F_RDLCK;
3845                 fl->fl_pid = 0;
3846         }
3847         p = xdr_decode_hyper(p, &clientid);
3848         namelen = be32_to_cpup(p);
3849         p = xdr_inline_decode(xdr, namelen);
3850         if (likely(p))
3851                 return -NFS4ERR_DENIED;
3852 out_overflow:
3853         print_overflow_msg(__func__, xdr);
3854         return -EIO;
3855 }
3856
3857 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3858 {
3859         int status;
3860
3861         status = decode_op_hdr(xdr, OP_LOCK);
3862         if (status == -EIO)
3863                 goto out;
3864         if (status == 0) {
3865                 status = decode_stateid(xdr, &res->stateid);
3866                 if (unlikely(status))
3867                         goto out;
3868         } else if (status == -NFS4ERR_DENIED)
3869                 status = decode_lock_denied(xdr, NULL);
3870         if (res->open_seqid != NULL)
3871                 nfs_increment_open_seqid(status, res->open_seqid);
3872         nfs_increment_lock_seqid(status, res->lock_seqid);
3873 out:
3874         return status;
3875 }
3876
3877 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3878 {
3879         int status;
3880         status = decode_op_hdr(xdr, OP_LOCKT);
3881         if (status == -NFS4ERR_DENIED)
3882                 return decode_lock_denied(xdr, res->denied);
3883         return status;
3884 }
3885
3886 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3887 {
3888         int status;
3889
3890         status = decode_op_hdr(xdr, OP_LOCKU);
3891         if (status != -EIO)
3892                 nfs_increment_lock_seqid(status, res->seqid);
3893         if (status == 0)
3894                 status = decode_stateid(xdr, &res->stateid);
3895         return status;
3896 }
3897
3898 static int decode_lookup(struct xdr_stream *xdr)
3899 {
3900         return decode_op_hdr(xdr, OP_LOOKUP);
3901 }
3902
3903 /* This is too sick! */
3904 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3905 {
3906         __be32 *p;
3907         uint32_t limit_type, nblocks, blocksize;
3908
3909         p = xdr_inline_decode(xdr, 12);
3910         if (unlikely(!p))
3911                 goto out_overflow;
3912         limit_type = be32_to_cpup(p++);
3913         switch (limit_type) {
3914         case 1:
3915                 xdr_decode_hyper(p, maxsize);
3916                 break;
3917         case 2:
3918                 nblocks = be32_to_cpup(p++);
3919                 blocksize = be32_to_cpup(p);
3920                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3921         }
3922         return 0;
3923 out_overflow:
3924         print_overflow_msg(__func__, xdr);
3925         return -EIO;
3926 }
3927
3928 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3929 {
3930         __be32 *p;
3931         uint32_t delegation_type;
3932         int status;
3933
3934         p = xdr_inline_decode(xdr, 4);
3935         if (unlikely(!p))
3936                 goto out_overflow;
3937         delegation_type = be32_to_cpup(p);
3938         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3939                 res->delegation_type = 0;
3940                 return 0;
3941         }
3942         status = decode_stateid(xdr, &res->delegation);
3943         if (unlikely(status))
3944                 return status;
3945         p = xdr_inline_decode(xdr, 4);
3946         if (unlikely(!p))
3947                 goto out_overflow;
3948         res->do_recall = be32_to_cpup(p);
3949
3950         switch (delegation_type) {
3951         case NFS4_OPEN_DELEGATE_READ:
3952                 res->delegation_type = FMODE_READ;
3953                 break;
3954         case NFS4_OPEN_DELEGATE_WRITE:
3955                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3956                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3957                                 return -EIO;
3958         }
3959         return decode_ace(xdr, NULL, res->server->nfs_client);
3960 out_overflow:
3961         print_overflow_msg(__func__, xdr);
3962         return -EIO;
3963 }
3964
3965 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3966 {
3967         __be32 *p;
3968         uint32_t savewords, bmlen, i;
3969         int status;
3970
3971         status = decode_op_hdr(xdr, OP_OPEN);
3972         if (status != -EIO)
3973                 nfs_increment_open_seqid(status, res->seqid);
3974         if (!status)
3975                 status = decode_stateid(xdr, &res->stateid);
3976         if (unlikely(status))
3977                 return status;
3978
3979         decode_change_info(xdr, &res->cinfo);
3980
3981         p = xdr_inline_decode(xdr, 8);
3982         if (unlikely(!p))
3983                 goto out_overflow;
3984         res->rflags = be32_to_cpup(p++);
3985         bmlen = be32_to_cpup(p);
3986         if (bmlen > 10)
3987                 goto xdr_error;
3988
3989         p = xdr_inline_decode(xdr, bmlen << 2);
3990         if (unlikely(!p))
3991                 goto out_overflow;
3992         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3993         for (i = 0; i < savewords; ++i)
3994                 res->attrset[i] = be32_to_cpup(p++);
3995         for (; i < NFS4_BITMAP_SIZE; i++)
3996                 res->attrset[i] = 0;
3997
3998         return decode_delegation(xdr, res);
3999 xdr_error:
4000         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4001         return -EIO;
4002 out_overflow:
4003         print_overflow_msg(__func__, xdr);
4004         return -EIO;
4005 }
4006
4007 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4008 {
4009         int status;
4010
4011         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4012         if (status != -EIO)
4013                 nfs_increment_open_seqid(status, res->seqid);
4014         if (!status)
4015                 status = decode_stateid(xdr, &res->stateid);
4016         return status;
4017 }
4018
4019 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4020 {
4021         int status;
4022
4023         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4024         if (status != -EIO)
4025                 nfs_increment_open_seqid(status, res->seqid);
4026         if (!status)
4027                 status = decode_stateid(xdr, &res->stateid);
4028         return status;
4029 }
4030
4031 static int decode_putfh(struct xdr_stream *xdr)
4032 {
4033         return decode_op_hdr(xdr, OP_PUTFH);
4034 }
4035
4036 static int decode_putrootfh(struct xdr_stream *xdr)
4037 {
4038         return decode_op_hdr(xdr, OP_PUTROOTFH);
4039 }
4040
4041 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4042 {
4043         struct kvec *iov = req->rq_rcv_buf.head;
4044         __be32 *p;
4045         uint32_t count, eof, recvd, hdrlen;
4046         int status;
4047
4048         status = decode_op_hdr(xdr, OP_READ);
4049         if (status)
4050                 return status;
4051         p = xdr_inline_decode(xdr, 8);
4052         if (unlikely(!p))
4053                 goto out_overflow;
4054         eof = be32_to_cpup(p++);
4055         count = be32_to_cpup(p);
4056         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4057         recvd = req->rq_rcv_buf.len - hdrlen;
4058         if (count > recvd) {
4059                 dprintk("NFS: server cheating in read reply: "
4060                                 "count %u > recvd %u\n", count, recvd);
4061                 count = recvd;
4062                 eof = 0;
4063         }
4064         xdr_read_pages(xdr, count);
4065         res->eof = eof;
4066         res->count = count;
4067         return 0;
4068 out_overflow:
4069         print_overflow_msg(__func__, xdr);
4070         return -EIO;
4071 }
4072
4073 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4074 {
4075         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4076         struct page     *page = *rcvbuf->pages;
4077         struct kvec     *iov = rcvbuf->head;
4078         size_t          hdrlen;
4079         u32             recvd, pglen = rcvbuf->page_len;
4080         __be32          *end, *entry, *p, *kaddr;
4081         unsigned int    nr = 0;
4082         int             status;
4083
4084         status = decode_op_hdr(xdr, OP_READDIR);
4085         if (!status)
4086                 status = decode_verifier(xdr, readdir->verifier.data);
4087         if (unlikely(status))
4088                 return status;
4089         dprintk("%s: verifier = %08x:%08x\n",
4090                         __func__,
4091                         ((u32 *)readdir->verifier.data)[0],
4092                         ((u32 *)readdir->verifier.data)[1]);
4093
4094
4095         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4096         recvd = rcvbuf->len - hdrlen;
4097         if (pglen > recvd)
4098                 pglen = recvd;
4099         xdr_read_pages(xdr, pglen);
4100
4101         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4102         kaddr = p = kmap_atomic(page, KM_USER0);
4103         end = p + ((pglen + readdir->pgbase) >> 2);
4104         entry = p;
4105
4106         /* Make sure the packet actually has a value_follows and EOF entry */
4107         if ((entry + 1) > end)
4108                 goto short_pkt;
4109
4110         for (; *p++; nr++) {
4111                 u32 len, attrlen, xlen;
4112                 if (end - p < 3)
4113                         goto short_pkt;
4114                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4115                 p += 2;                 /* cookie */
4116                 len = ntohl(*p++);      /* filename length */
4117                 if (len > NFS4_MAXNAMLEN) {
4118                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4119                                         len);
4120                         goto err_unmap;
4121                 }
4122                 xlen = XDR_QUADLEN(len);
4123                 if (end - p < xlen + 1)
4124                         goto short_pkt;
4125                 dprintk("filename = %*s\n", len, (char *)p);
4126                 p += xlen;
4127                 len = ntohl(*p++);      /* bitmap length */
4128                 if (end - p < len + 1)
4129                         goto short_pkt;
4130                 p += len;
4131                 attrlen = XDR_QUADLEN(ntohl(*p++));
4132                 if (end - p < attrlen + 2)
4133                         goto short_pkt;
4134                 p += attrlen;           /* attributes */
4135                 entry = p;
4136         }
4137         /*
4138          * Apparently some server sends responses that are a valid size, but
4139          * contain no entries, and have value_follows==0 and EOF==0. For
4140          * those, just set the EOF marker.
4141          */
4142         if (!nr && entry[1] == 0) {
4143                 dprintk("NFS: readdir reply truncated!\n");
4144                 entry[1] = 1;
4145         }
4146 out:
4147         kunmap_atomic(kaddr, KM_USER0);
4148         return 0;
4149 short_pkt:
4150         /*
4151          * When we get a short packet there are 2 possibilities. We can
4152          * return an error, or fix up the response to look like a valid
4153          * response and return what we have so far. If there are no
4154          * entries and the packet was short, then return -EIO. If there
4155          * are valid entries in the response, return them and pretend that
4156          * the call was successful, but incomplete. The caller can retry the
4157          * readdir starting at the last cookie.
4158          */
4159         dprintk("%s: short packet at entry %d\n", __func__, nr);
4160         entry[0] = entry[1] = 0;
4161         if (nr)
4162                 goto out;
4163 err_unmap:
4164         kunmap_atomic(kaddr, KM_USER0);
4165         return -errno_NFSERR_IO;
4166 }
4167
4168 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4169 {
4170         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4171         struct kvec *iov = rcvbuf->head;
4172         size_t hdrlen;
4173         u32 len, recvd;
4174         __be32 *p;
4175         char *kaddr;
4176         int status;
4177
4178         status = decode_op_hdr(xdr, OP_READLINK);
4179         if (status)
4180                 return status;
4181
4182         /* Convert length of symlink */
4183         p = xdr_inline_decode(xdr, 4);
4184         if (unlikely(!p))
4185                 goto out_overflow;
4186         len = be32_to_cpup(p);
4187         if (len >= rcvbuf->page_len || len <= 0) {
4188                 dprintk("nfs: server returned giant symlink!\n");
4189                 return -ENAMETOOLONG;
4190         }
4191         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4192         recvd = req->rq_rcv_buf.len - hdrlen;
4193         if (recvd < len) {
4194                 dprintk("NFS: server cheating in readlink reply: "
4195                                 "count %u > recvd %u\n", len, recvd);
4196                 return -EIO;
4197         }
4198         xdr_read_pages(xdr, len);
4199         /*
4200          * The XDR encode routine has set things up so that
4201          * the link text will be copied directly into the
4202          * buffer.  We just have to do overflow-checking,
4203          * and and null-terminate the text (the VFS expects
4204          * null-termination).
4205          */
4206         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4207         kaddr[len+rcvbuf->page_base] = '\0';
4208         kunmap_atomic(kaddr, KM_USER0);
4209         return 0;
4210 out_overflow:
4211         print_overflow_msg(__func__, xdr);
4212         return -EIO;
4213 }
4214
4215 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4216 {
4217         int status;
4218
4219         status = decode_op_hdr(xdr, OP_REMOVE);
4220         if (status)
4221                 goto out;
4222         status = decode_change_info(xdr, cinfo);
4223 out:
4224         return status;
4225 }
4226
4227 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4228               struct nfs4_change_info *new_cinfo)
4229 {
4230         int status;
4231
4232         status = decode_op_hdr(xdr, OP_RENAME);
4233         if (status)
4234                 goto out;
4235         if ((status = decode_change_info(xdr, old_cinfo)))
4236                 goto out;
4237         status = decode_change_info(xdr, new_cinfo);
4238 out:
4239         return status;
4240 }
4241
4242 static int decode_renew(struct xdr_stream *xdr)
4243 {
4244         return decode_op_hdr(xdr, OP_RENEW);
4245 }
4246
4247 static int
4248 decode_restorefh(struct xdr_stream *xdr)
4249 {
4250         return decode_op_hdr(xdr, OP_RESTOREFH);
4251 }
4252
4253 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4254                 size_t *acl_len)
4255 {
4256         __be32 *savep;
4257         uint32_t attrlen,
4258                  bitmap[2] = {0};
4259         struct kvec *iov = req->rq_rcv_buf.head;
4260         int status;
4261
4262         *acl_len = 0;
4263         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4264                 goto out;
4265         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4266                 goto out;
4267         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4268                 goto out;
4269
4270         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4271                 return -EIO;
4272         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4273                 size_t hdrlen;
4274                 u32 recvd;
4275
4276                 /* We ignore &savep and don't do consistency checks on
4277                  * the attr length.  Let userspace figure it out.... */
4278                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4279                 recvd = req->rq_rcv_buf.len - hdrlen;
4280                 if (attrlen > recvd) {
4281                         dprintk("NFS: server cheating in getattr"
4282                                         " acl reply: attrlen %u > recvd %u\n",
4283                                         attrlen, recvd);
4284                         return -EINVAL;
4285                 }
4286                 xdr_read_pages(xdr, attrlen);
4287                 *acl_len = attrlen;
4288         } else
4289                 status = -EOPNOTSUPP;
4290
4291 out:
4292         return status;
4293 }
4294
4295 static int
4296 decode_savefh(struct xdr_stream *xdr)
4297 {
4298         return decode_op_hdr(xdr, OP_SAVEFH);
4299 }
4300
4301 static int decode_setattr(struct xdr_stream *xdr)
4302 {
4303         __be32 *p;
4304         uint32_t bmlen;
4305         int status;
4306
4307         status = decode_op_hdr(xdr, OP_SETATTR);
4308         if (status)
4309                 return status;
4310         p = xdr_inline_decode(xdr, 4);
4311         if (unlikely(!p))
4312                 goto out_overflow;
4313         bmlen = be32_to_cpup(p);
4314         p = xdr_inline_decode(xdr, bmlen << 2);
4315         if (likely(p))
4316                 return 0;
4317 out_overflow:
4318         print_overflow_msg(__func__, xdr);
4319         return -EIO;
4320 }
4321
4322 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4323 {
4324         __be32 *p;
4325         uint32_t opnum;
4326         int32_t nfserr;
4327
4328         p = xdr_inline_decode(xdr, 8);
4329         if (unlikely(!p))
4330                 goto out_overflow;
4331         opnum = be32_to_cpup(p++);
4332         if (opnum != OP_SETCLIENTID) {
4333                 dprintk("nfs: decode_setclientid: Server returned operation"
4334                         " %d\n", opnum);
4335                 return -EIO;
4336         }
4337         nfserr = be32_to_cpup(p);
4338         if (nfserr == NFS_OK) {
4339                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4340                 if (unlikely(!p))
4341                         goto out_overflow;
4342                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4343                 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4344         } else if (nfserr == NFSERR_CLID_INUSE) {
4345                 uint32_t len;
4346
4347                 /* skip netid string */
4348                 p = xdr_inline_decode(xdr, 4);
4349                 if (unlikely(!p))
4350                         goto out_overflow;
4351                 len = be32_to_cpup(p);
4352                 p = xdr_inline_decode(xdr, len);
4353                 if (unlikely(!p))
4354                         goto out_overflow;
4355
4356                 /* skip uaddr string */
4357                 p = xdr_inline_decode(xdr, 4);
4358                 if (unlikely(!p))
4359                         goto out_overflow;
4360                 len = be32_to_cpup(p);
4361                 p = xdr_inline_decode(xdr, len);
4362                 if (unlikely(!p))
4363                         goto out_overflow;
4364                 return -NFSERR_CLID_INUSE;
4365         } else
4366                 return nfs4_stat_to_errno(nfserr);
4367
4368         return 0;
4369 out_overflow:
4370         print_overflow_msg(__func__, xdr);
4371         return -EIO;
4372 }
4373
4374 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4375 {
4376         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4377 }
4378
4379 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4380 {
4381         __be32 *p;
4382         int status;
4383
4384         status = decode_op_hdr(xdr, OP_WRITE);
4385         if (status)
4386                 return status;
4387
4388         p = xdr_inline_decode(xdr, 16);
4389         if (unlikely(!p))
4390                 goto out_overflow;
4391         res->count = be32_to_cpup(p++);
4392         res->verf->committed = be32_to_cpup(p++);
4393         memcpy(res->verf->verifier, p, 8);
4394         return 0;
4395 out_overflow:
4396         print_overflow_msg(__func__, xdr);
4397         return -EIO;
4398 }
4399
4400 static int decode_delegreturn(struct xdr_stream *xdr)
4401 {
4402         return decode_op_hdr(xdr, OP_DELEGRETURN);
4403 }
4404
4405 #if defined(CONFIG_NFS_V4_1)
4406 static int decode_exchange_id(struct xdr_stream *xdr,
4407                               struct nfs41_exchange_id_res *res)
4408 {
4409         __be32 *p;
4410         uint32_t dummy;
4411         char *dummy_str;
4412         int status;
4413         struct nfs_client *clp = res->client;
4414
4415         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4416         if (status)
4417                 return status;
4418
4419         p = xdr_inline_decode(xdr, 8);
4420         if (unlikely(!p))
4421                 goto out_overflow;
4422         xdr_decode_hyper(p, &clp->cl_ex_clid);
4423         p = xdr_inline_decode(xdr, 12);
4424         if (unlikely(!p))
4425                 goto out_overflow;
4426         clp->cl_seqid = be32_to_cpup(p++);
4427         clp->cl_exchange_flags = be32_to_cpup(p++);
4428
4429         /* We ask for SP4_NONE */
4430         dummy = be32_to_cpup(p);
4431         if (dummy != SP4_NONE)
4432                 return -EIO;
4433
4434         /* Throw away minor_id */
4435         p = xdr_inline_decode(xdr, 8);
4436         if (unlikely(!p))
4437                 goto out_overflow;
4438
4439         /* Throw away Major id */
4440         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4441         if (unlikely(status))
4442                 return status;
4443
4444         /* Throw away server_scope */
4445         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4446         if (unlikely(status))
4447                 return status;
4448
4449         /* Throw away Implementation id array */
4450         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4451         if (unlikely(status))
4452                 return status;
4453
4454         return 0;
4455 out_overflow:
4456         print_overflow_msg(__func__, xdr);
4457         return -EIO;
4458 }
4459
4460 static int decode_chan_attrs(struct xdr_stream *xdr,
4461                              struct nfs4_channel_attrs *attrs)
4462 {
4463         __be32 *p;
4464         u32 nr_attrs;
4465
4466         p = xdr_inline_decode(xdr, 28);
4467         if (unlikely(!p))
4468                 goto out_overflow;
4469         attrs->headerpadsz = be32_to_cpup(p++);
4470         attrs->max_rqst_sz = be32_to_cpup(p++);
4471         attrs->max_resp_sz = be32_to_cpup(p++);
4472         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4473         attrs->max_ops = be32_to_cpup(p++);
4474         attrs->max_reqs = be32_to_cpup(p++);
4475         nr_attrs = be32_to_cpup(p);
4476         if (unlikely(nr_attrs > 1)) {
4477                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4478                         __func__, nr_attrs);
4479                 return -EINVAL;
4480         }
4481         if (nr_attrs == 1) {
4482                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4483                 if (unlikely(!p))
4484                         goto out_overflow;
4485         }
4486         return 0;
4487 out_overflow:
4488         print_overflow_msg(__func__, xdr);
4489         return -EIO;
4490 }
4491
4492 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4493 {
4494         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4495 }
4496
4497 static int decode_create_session(struct xdr_stream *xdr,
4498                                  struct nfs41_create_session_res *res)
4499 {
4500         __be32 *p;
4501         int status;
4502         struct nfs_client *clp = res->client;
4503         struct nfs4_session *session = clp->cl_session;
4504
4505         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4506         if (!status)
4507                 status = decode_sessionid(xdr, &session->sess_id);
4508         if (unlikely(status))
4509                 return status;
4510
4511         /* seqid, flags */
4512         p = xdr_inline_decode(xdr, 8);
4513         if (unlikely(!p))
4514                 goto out_overflow;
4515         clp->cl_seqid = be32_to_cpup(p++);
4516         session->flags = be32_to_cpup(p);
4517
4518         /* Channel attributes */
4519         status = decode_chan_attrs(xdr, &session->fc_attrs);
4520         if (!status)
4521                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4522         return status;
4523 out_overflow:
4524         print_overflow_msg(__func__, xdr);
4525         return -EIO;
4526 }
4527
4528 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4529 {
4530         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4531 }
4532 #endif /* CONFIG_NFS_V4_1 */
4533
4534 static int decode_sequence(struct xdr_stream *xdr,
4535                            struct nfs4_sequence_res *res,
4536                            struct rpc_rqst *rqstp)
4537 {
4538 #if defined(CONFIG_NFS_V4_1)
4539         struct nfs4_slot *slot;
4540         struct nfs4_sessionid id;
4541         u32 dummy;
4542         int status;
4543         __be32 *p;
4544
4545         if (!res->sr_session)
4546                 return 0;
4547
4548         status = decode_op_hdr(xdr, OP_SEQUENCE);
4549         if (!status)
4550                 status = decode_sessionid(xdr, &id);
4551         if (unlikely(status))
4552                 goto out_err;
4553
4554         /*
4555          * If the server returns different values for sessionID, slotID or
4556          * sequence number, the server is looney tunes.
4557          */
4558         status = -ESERVERFAULT;
4559
4560         if (memcmp(id.data, res->sr_session->sess_id.data,
4561                    NFS4_MAX_SESSIONID_LEN)) {
4562                 dprintk("%s Invalid session id\n", __func__);
4563                 goto out_err;
4564         }
4565
4566         p = xdr_inline_decode(xdr, 20);
4567         if (unlikely(!p))
4568                 goto out_overflow;
4569
4570         /* seqid */
4571         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4572         dummy = be32_to_cpup(p++);
4573         if (dummy != slot->seq_nr) {
4574                 dprintk("%s Invalid sequence number\n", __func__);
4575                 goto out_err;
4576         }
4577         /* slot id */
4578         dummy = be32_to_cpup(p++);
4579         if (dummy != res->sr_slotid) {
4580                 dprintk("%s Invalid slot id\n", __func__);
4581                 goto out_err;
4582         }
4583         /* highest slot id - currently not processed */
4584         dummy = be32_to_cpup(p++);
4585         /* target highest slot id - currently not processed */
4586         dummy = be32_to_cpup(p++);
4587         /* result flags - currently not processed */
4588         dummy = be32_to_cpup(p);
4589         status = 0;
4590 out_err:
4591         res->sr_status = status;
4592         return status;
4593 out_overflow:
4594         print_overflow_msg(__func__, xdr);
4595         status = -EIO;
4596         goto out_err;
4597 #else  /* CONFIG_NFS_V4_1 */
4598         return 0;
4599 #endif /* CONFIG_NFS_V4_1 */
4600 }
4601
4602 /*
4603  * END OF "GENERIC" DECODE ROUTINES.
4604  */
4605
4606 /*
4607  * Decode OPEN_DOWNGRADE response
4608  */
4609 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4610 {
4611         struct xdr_stream xdr;
4612         struct compound_hdr hdr;
4613         int status;
4614
4615         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4616         status = decode_compound_hdr(&xdr, &hdr);
4617         if (status)
4618                 goto out;
4619         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4620         if (status)
4621                 goto out;
4622         status = decode_putfh(&xdr);
4623         if (status)
4624                 goto out;
4625         status = decode_open_downgrade(&xdr, res);
4626         if (status != 0)
4627                 goto out;
4628         decode_getfattr(&xdr, res->fattr, res->server,
4629                         !RPC_IS_ASYNC(rqstp->rq_task));
4630 out:
4631         return status;
4632 }
4633
4634 /*
4635  * Decode ACCESS response
4636  */
4637 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4638 {
4639         struct xdr_stream xdr;
4640         struct compound_hdr hdr;
4641         int status;
4642
4643         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4644         status = decode_compound_hdr(&xdr, &hdr);
4645         if (status)
4646                 goto out;
4647         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4648         if (status)
4649                 goto out;
4650         status = decode_putfh(&xdr);
4651         if (status != 0)
4652                 goto out;
4653         status = decode_access(&xdr, res);
4654         if (status != 0)
4655                 goto out;
4656         decode_getfattr(&xdr, res->fattr, res->server,
4657                         !RPC_IS_ASYNC(rqstp->rq_task));
4658 out:
4659         return status;
4660 }
4661
4662 /*
4663  * Decode LOOKUP response
4664  */
4665 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4666 {
4667         struct xdr_stream xdr;
4668         struct compound_hdr hdr;
4669         int status;
4670
4671         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4672         status = decode_compound_hdr(&xdr, &hdr);
4673         if (status)
4674                 goto out;
4675         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4676         if (status)
4677                 goto out;
4678         if ((status = decode_putfh(&xdr)) != 0)
4679                 goto out;
4680         if ((status = decode_lookup(&xdr)) != 0)
4681                 goto out;
4682         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4683                 goto out;
4684         status = decode_getfattr(&xdr, res->fattr, res->server
4685                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4686 out:
4687         return status;
4688 }
4689
4690 /*
4691  * Decode LOOKUP_ROOT response
4692  */
4693 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4694 {
4695         struct xdr_stream xdr;
4696         struct compound_hdr hdr;
4697         int status;
4698
4699         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4700         status = decode_compound_hdr(&xdr, &hdr);
4701         if (status)
4702                 goto out;
4703         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4704         if (status)
4705                 goto out;
4706         if ((status = decode_putrootfh(&xdr)) != 0)
4707                 goto out;
4708         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4709                 status = decode_getfattr(&xdr, res->fattr, res->server,
4710                                 !RPC_IS_ASYNC(rqstp->rq_task));
4711 out:
4712         return status;
4713 }
4714
4715 /*
4716  * Decode REMOVE response
4717  */
4718 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4719 {
4720         struct xdr_stream xdr;
4721         struct compound_hdr hdr;
4722         int status;
4723
4724         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4725         status = decode_compound_hdr(&xdr, &hdr);
4726         if (status)
4727                 goto out;
4728         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4729         if (status)
4730                 goto out;
4731         if ((status = decode_putfh(&xdr)) != 0)
4732                 goto out;
4733         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4734                 goto out;
4735         decode_getfattr(&xdr, &res->dir_attr, res->server,
4736                         !RPC_IS_ASYNC(rqstp->rq_task));
4737 out:
4738         return status;
4739 }
4740
4741 /*
4742  * Decode RENAME response
4743  */
4744 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4745 {
4746         struct xdr_stream xdr;
4747         struct compound_hdr hdr;
4748         int status;
4749
4750         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4751         status = decode_compound_hdr(&xdr, &hdr);
4752         if (status)
4753                 goto out;
4754         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4755         if (status)
4756                 goto out;
4757         if ((status = decode_putfh(&xdr)) != 0)
4758                 goto out;
4759         if ((status = decode_savefh(&xdr)) != 0)
4760                 goto out;
4761         if ((status = decode_putfh(&xdr)) != 0)
4762                 goto out;
4763         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4764                 goto out;
4765         /* Current FH is target directory */
4766         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4767                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4768                 goto out;
4769         if ((status = decode_restorefh(&xdr)) != 0)
4770                 goto out;
4771         decode_getfattr(&xdr, res->old_fattr, res->server,
4772                         !RPC_IS_ASYNC(rqstp->rq_task));
4773 out:
4774         return status;
4775 }
4776
4777 /*
4778  * Decode LINK response
4779  */
4780 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4781 {
4782         struct xdr_stream xdr;
4783         struct compound_hdr hdr;
4784         int status;
4785
4786         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4787         status = decode_compound_hdr(&xdr, &hdr);
4788         if (status)
4789                 goto out;
4790         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4791         if (status)
4792                 goto out;
4793         if ((status = decode_putfh(&xdr)) != 0)
4794                 goto out;
4795         if ((status = decode_savefh(&xdr)) != 0)
4796                 goto out;
4797         if ((status = decode_putfh(&xdr)) != 0)
4798                 goto out;
4799         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4800                 goto out;
4801         /*
4802          * Note order: OP_LINK leaves the directory as the current
4803          *             filehandle.
4804          */
4805         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4806                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4807                 goto out;
4808         if ((status = decode_restorefh(&xdr)) != 0)
4809                 goto out;
4810         decode_getfattr(&xdr, res->fattr, res->server,
4811                         !RPC_IS_ASYNC(rqstp->rq_task));
4812 out:
4813         return status;
4814 }
4815
4816 /*
4817  * Decode CREATE response
4818  */
4819 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4820 {
4821         struct xdr_stream xdr;
4822         struct compound_hdr hdr;
4823         int status;
4824
4825         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4826         status = decode_compound_hdr(&xdr, &hdr);
4827         if (status)
4828                 goto out;
4829         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4830         if (status)
4831                 goto out;
4832         if ((status = decode_putfh(&xdr)) != 0)
4833                 goto out;
4834         if ((status = decode_savefh(&xdr)) != 0)
4835                 goto out;
4836         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4837                 goto out;
4838         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4839                 goto out;
4840         if (decode_getfattr(&xdr, res->fattr, res->server,
4841                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4842                 goto out;
4843         if ((status = decode_restorefh(&xdr)) != 0)
4844                 goto out;
4845         decode_getfattr(&xdr, res->dir_fattr, res->server,
4846                         !RPC_IS_ASYNC(rqstp->rq_task));
4847 out:
4848         return status;
4849 }
4850
4851 /*
4852  * Decode SYMLINK response
4853  */
4854 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4855 {
4856         return nfs4_xdr_dec_create(rqstp, p, res);
4857 }
4858
4859 /*
4860  * Decode GETATTR response
4861  */
4862 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4863 {
4864         struct xdr_stream xdr;
4865         struct compound_hdr hdr;
4866         int status;
4867
4868         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4869         status = decode_compound_hdr(&xdr, &hdr);
4870         if (status)
4871                 goto out;
4872         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4873         if (status)
4874                 goto out;
4875         status = decode_putfh(&xdr);
4876         if (status)
4877                 goto out;
4878         status = decode_getfattr(&xdr, res->fattr, res->server,
4879                         !RPC_IS_ASYNC(rqstp->rq_task));
4880 out:
4881         return status;
4882 }
4883
4884 /*
4885  * Encode an SETACL request
4886  */
4887 static int
4888 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4889 {
4890         struct xdr_stream xdr;
4891         struct compound_hdr hdr = {
4892                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4893         };
4894         int status;
4895
4896         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4897         encode_compound_hdr(&xdr, req, &hdr);
4898         encode_sequence(&xdr, &args->seq_args, &hdr);
4899         encode_putfh(&xdr, args->fh, &hdr);
4900         status = encode_setacl(&xdr, args, &hdr);
4901         encode_nops(&hdr);
4902         return status;
4903 }
4904
4905 /*
4906  * Decode SETACL response
4907  */
4908 static int
4909 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4910                     struct nfs_setaclres *res)
4911 {
4912         struct xdr_stream xdr;
4913         struct compound_hdr hdr;
4914         int status;
4915
4916         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4917         status = decode_compound_hdr(&xdr, &hdr);
4918         if (status)
4919                 goto out;
4920         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4921         if (status)
4922                 goto out;
4923         status = decode_putfh(&xdr);
4924         if (status)
4925                 goto out;
4926         status = decode_setattr(&xdr);
4927 out:
4928         return status;
4929 }
4930
4931 /*
4932  * Decode GETACL response
4933  */
4934 static int
4935 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4936                     struct nfs_getaclres *res)
4937 {
4938         struct xdr_stream xdr;
4939         struct compound_hdr hdr;
4940         int status;
4941
4942         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4943         status = decode_compound_hdr(&xdr, &hdr);
4944         if (status)
4945                 goto out;
4946         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4947         if (status)
4948                 goto out;
4949         status = decode_putfh(&xdr);
4950         if (status)
4951                 goto out;
4952         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4953
4954 out:
4955         return status;
4956 }
4957
4958 /*
4959  * Decode CLOSE response
4960  */
4961 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4962 {
4963         struct xdr_stream xdr;
4964         struct compound_hdr hdr;
4965         int status;
4966
4967         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4968         status = decode_compound_hdr(&xdr, &hdr);
4969         if (status)
4970                 goto out;
4971         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4972         if (status)
4973                 goto out;
4974         status = decode_putfh(&xdr);
4975         if (status)
4976                 goto out;
4977         status = decode_close(&xdr, res);
4978         if (status != 0)
4979                 goto out;
4980         /*
4981          * Note: Server may do delete on close for this file
4982          *      in which case the getattr call will fail with
4983          *      an ESTALE error. Shouldn't be a problem,
4984          *      though, since fattr->valid will remain unset.
4985          */
4986         decode_getfattr(&xdr, res->fattr, res->server,
4987                         !RPC_IS_ASYNC(rqstp->rq_task));
4988 out:
4989         return status;
4990 }
4991
4992 /*
4993  * Decode OPEN response
4994  */
4995 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4996 {
4997         struct xdr_stream xdr;
4998         struct compound_hdr hdr;
4999         int status;
5000
5001         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5002         status = decode_compound_hdr(&xdr, &hdr);
5003         if (status)
5004                 goto out;
5005         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5006         if (status)
5007                 goto out;
5008         status = decode_putfh(&xdr);
5009         if (status)
5010                 goto out;
5011         status = decode_savefh(&xdr);
5012         if (status)
5013                 goto out;
5014         status = decode_open(&xdr, res);
5015         if (status)
5016                 goto out;
5017         if (decode_getfh(&xdr, &res->fh) != 0)
5018                 goto out;
5019         if (decode_getfattr(&xdr, res->f_attr, res->server,
5020                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5021                 goto out;
5022         if (decode_restorefh(&xdr) != 0)
5023                 goto out;
5024         decode_getfattr(&xdr, res->dir_attr, res->server,
5025                         !RPC_IS_ASYNC(rqstp->rq_task));
5026 out:
5027         return status;
5028 }
5029
5030 /*
5031  * Decode OPEN_CONFIRM response
5032  */
5033 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5034 {
5035         struct xdr_stream xdr;
5036         struct compound_hdr hdr;
5037         int status;
5038
5039         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5040         status = decode_compound_hdr(&xdr, &hdr);
5041         if (status)
5042                 goto out;
5043         status = decode_putfh(&xdr);
5044         if (status)
5045                 goto out;
5046         status = decode_open_confirm(&xdr, res);
5047 out:
5048         return status;
5049 }
5050
5051 /*
5052  * Decode OPEN response
5053  */
5054 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5055 {
5056         struct xdr_stream xdr;
5057         struct compound_hdr hdr;
5058         int status;
5059
5060         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5061         status = decode_compound_hdr(&xdr, &hdr);
5062         if (status)
5063                 goto out;
5064         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5065         if (status)
5066                 goto out;
5067         status = decode_putfh(&xdr);
5068         if (status)
5069                 goto out;
5070         status = decode_open(&xdr, res);
5071         if (status)
5072                 goto out;
5073         decode_getfattr(&xdr, res->f_attr, res->server,
5074                         !RPC_IS_ASYNC(rqstp->rq_task));
5075 out:
5076         return status;
5077 }
5078
5079 /*
5080  * Decode SETATTR response
5081  */
5082 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5083 {
5084         struct xdr_stream xdr;
5085         struct compound_hdr hdr;
5086         int status;
5087
5088         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5089         status = decode_compound_hdr(&xdr, &hdr);
5090         if (status)
5091                 goto out;
5092         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5093         if (status)
5094                 goto out;
5095         status = decode_putfh(&xdr);
5096         if (status)
5097                 goto out;
5098         status = decode_setattr(&xdr);
5099         if (status)
5100                 goto out;
5101         decode_getfattr(&xdr, res->fattr, res->server,
5102                         !RPC_IS_ASYNC(rqstp->rq_task));
5103 out:
5104         return status;
5105 }
5106
5107 /*
5108  * Decode LOCK response
5109  */
5110 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5111 {
5112         struct xdr_stream xdr;
5113         struct compound_hdr hdr;
5114         int status;
5115
5116         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5117         status = decode_compound_hdr(&xdr, &hdr);
5118         if (status)
5119                 goto out;
5120         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5121         if (status)
5122                 goto out;
5123         status = decode_putfh(&xdr);
5124         if (status)
5125                 goto out;
5126         status = decode_lock(&xdr, res);
5127 out:
5128         return status;
5129 }
5130
5131 /*
5132  * Decode LOCKT response
5133  */
5134 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5135 {
5136         struct xdr_stream xdr;
5137         struct compound_hdr hdr;
5138         int status;
5139
5140         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5141         status = decode_compound_hdr(&xdr, &hdr);
5142         if (status)
5143                 goto out;
5144         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5145         if (status)
5146                 goto out;
5147         status = decode_putfh(&xdr);
5148         if (status)
5149                 goto out;
5150         status = decode_lockt(&xdr, res);
5151 out:
5152         return status;
5153 }
5154
5155 /*
5156  * Decode LOCKU response
5157  */
5158 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5159 {
5160         struct xdr_stream xdr;
5161         struct compound_hdr hdr;
5162         int status;
5163
5164         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5165         status = decode_compound_hdr(&xdr, &hdr);
5166         if (status)
5167                 goto out;
5168         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5169         if (status)
5170                 goto out;
5171         status = decode_putfh(&xdr);
5172         if (status)
5173                 goto out;
5174         status = decode_locku(&xdr, res);
5175 out:
5176         return status;
5177 }
5178
5179 /*
5180  * Decode READLINK response
5181  */
5182 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5183                                  struct nfs4_readlink_res *res)
5184 {
5185         struct xdr_stream xdr;
5186         struct compound_hdr hdr;
5187         int status;
5188
5189         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5190         status = decode_compound_hdr(&xdr, &hdr);
5191         if (status)
5192                 goto out;
5193         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5194         if (status)
5195                 goto out;
5196         status = decode_putfh(&xdr);
5197         if (status)
5198                 goto out;
5199         status = decode_readlink(&xdr, rqstp);
5200 out:
5201         return status;
5202 }
5203
5204 /*
5205  * Decode READDIR response
5206  */
5207 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5208 {
5209         struct xdr_stream xdr;
5210         struct compound_hdr hdr;
5211         int status;
5212
5213         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5214         status = decode_compound_hdr(&xdr, &hdr);
5215         if (status)
5216                 goto out;
5217         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5218         if (status)
5219                 goto out;
5220         status = decode_putfh(&xdr);
5221         if (status)
5222                 goto out;
5223         status = decode_readdir(&xdr, rqstp, res);
5224 out:
5225         return status;
5226 }
5227
5228 /*
5229  * Decode Read response
5230  */
5231 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5232 {
5233         struct xdr_stream xdr;
5234         struct compound_hdr hdr;
5235         int status;
5236
5237         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5238         status = decode_compound_hdr(&xdr, &hdr);
5239         if (status)
5240                 goto out;
5241         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5242         if (status)
5243                 goto out;
5244         status = decode_putfh(&xdr);
5245         if (status)
5246                 goto out;
5247         status = decode_read(&xdr, rqstp, res);
5248         if (!status)
5249                 status = res->count;
5250 out:
5251         return status;
5252 }
5253
5254 /*
5255  * Decode WRITE response
5256  */
5257 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5258 {
5259         struct xdr_stream xdr;
5260         struct compound_hdr hdr;
5261         int status;
5262
5263         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5264         status = decode_compound_hdr(&xdr, &hdr);
5265         if (status)
5266                 goto out;
5267         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5268         if (status)
5269                 goto out;
5270         status = decode_putfh(&xdr);
5271         if (status)
5272                 goto out;
5273         status = decode_write(&xdr, res);
5274         if (status)
5275                 goto out;
5276         decode_getfattr(&xdr, res->fattr, res->server,
5277                         !RPC_IS_ASYNC(rqstp->rq_task));
5278         if (!status)
5279                 status = res->count;
5280 out:
5281         return status;
5282 }
5283
5284 /*
5285  * Decode COMMIT response
5286  */
5287 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5288 {
5289         struct xdr_stream xdr;
5290         struct compound_hdr hdr;
5291         int status;
5292
5293         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5294         status = decode_compound_hdr(&xdr, &hdr);
5295         if (status)
5296                 goto out;
5297         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5298         if (status)
5299                 goto out;
5300         status = decode_putfh(&xdr);
5301         if (status)
5302                 goto out;
5303         status = decode_commit(&xdr, res);
5304         if (status)
5305                 goto out;
5306         decode_getfattr(&xdr, res->fattr, res->server,
5307                         !RPC_IS_ASYNC(rqstp->rq_task));
5308 out:
5309         return status;
5310 }
5311
5312 /*
5313  * FSINFO request
5314  */
5315 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5316                                struct nfs4_fsinfo_res *res)
5317 {
5318         struct xdr_stream xdr;
5319         struct compound_hdr hdr;
5320         int status;
5321
5322         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5323         status = decode_compound_hdr(&xdr, &hdr);
5324         if (!status)
5325                 status = decode_sequence(&xdr, &res->seq_res, req);
5326         if (!status)
5327                 status = decode_putfh(&xdr);
5328         if (!status)
5329                 status = decode_fsinfo(&xdr, res->fsinfo);
5330         return status;
5331 }
5332
5333 /*
5334  * PATHCONF request
5335  */
5336 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5337                                  struct nfs4_pathconf_res *res)
5338 {
5339         struct xdr_stream xdr;
5340         struct compound_hdr hdr;
5341         int status;
5342
5343         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5344         status = decode_compound_hdr(&xdr, &hdr);
5345         if (!status)
5346                 status = decode_sequence(&xdr, &res->seq_res, req);
5347         if (!status)
5348                 status = decode_putfh(&xdr);
5349         if (!status)
5350                 status = decode_pathconf(&xdr, res->pathconf);
5351         return status;
5352 }
5353
5354 /*
5355  * STATFS request
5356  */
5357 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5358                                struct nfs4_statfs_res *res)
5359 {
5360         struct xdr_stream xdr;
5361         struct compound_hdr hdr;
5362         int status;
5363
5364         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5365         status = decode_compound_hdr(&xdr, &hdr);
5366         if (!status)
5367                 status = decode_sequence(&xdr, &res->seq_res, req);
5368         if (!status)
5369                 status = decode_putfh(&xdr);
5370         if (!status)
5371                 status = decode_statfs(&xdr, res->fsstat);
5372         return status;
5373 }
5374
5375 /*
5376  * GETATTR_BITMAP request
5377  */
5378 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5379 {
5380         struct xdr_stream xdr;
5381         struct compound_hdr hdr;
5382         int status;
5383
5384         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5385         status = decode_compound_hdr(&xdr, &hdr);
5386         if (status)
5387                 goto out;
5388         status = decode_sequence(&xdr, &res->seq_res, req);
5389         if (status)
5390                 goto out;
5391         if ((status = decode_putfh(&xdr)) != 0)
5392                 goto out;
5393         status = decode_server_caps(&xdr, res);
5394 out:
5395         return status;
5396 }
5397
5398 /*
5399  * Decode RENEW response
5400  */
5401 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5402 {
5403         struct xdr_stream xdr;
5404         struct compound_hdr hdr;
5405         int status;
5406
5407         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5408         status = decode_compound_hdr(&xdr, &hdr);
5409         if (!status)
5410                 status = decode_renew(&xdr);
5411         return status;
5412 }
5413
5414 /*
5415  * a SETCLIENTID request
5416  */
5417 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5418                 struct nfs_client *clp)
5419 {
5420         struct xdr_stream xdr;
5421         struct compound_hdr hdr;
5422         int status;
5423
5424         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5425         status = decode_compound_hdr(&xdr, &hdr);
5426         if (!status)
5427                 status = decode_setclientid(&xdr, clp);
5428         return status;
5429 }
5430
5431 /*
5432  * a SETCLIENTID_CONFIRM request
5433  */
5434 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5435 {
5436         struct xdr_stream xdr;
5437         struct compound_hdr hdr;
5438         int status;
5439
5440         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5441         status = decode_compound_hdr(&xdr, &hdr);
5442         if (!status)
5443                 status = decode_setclientid_confirm(&xdr);
5444         if (!status)
5445                 status = decode_putrootfh(&xdr);
5446         if (!status)
5447                 status = decode_fsinfo(&xdr, fsinfo);
5448         return status;
5449 }
5450
5451 /*
5452  * DELEGRETURN request
5453  */
5454 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5455 {
5456         struct xdr_stream xdr;
5457         struct compound_hdr hdr;
5458         int status;
5459
5460         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5461         status = decode_compound_hdr(&xdr, &hdr);
5462         if (status)
5463                 goto out;
5464         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5465         if (status)
5466                 goto out;
5467         status = decode_putfh(&xdr);
5468         if (status != 0)
5469                 goto out;
5470         status = decode_delegreturn(&xdr);
5471         decode_getfattr(&xdr, res->fattr, res->server,
5472                         !RPC_IS_ASYNC(rqstp->rq_task));
5473 out:
5474         return status;
5475 }
5476
5477 /*
5478  * FS_LOCATIONS request
5479  */
5480 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5481                                      struct nfs4_fs_locations_res *res)
5482 {
5483         struct xdr_stream xdr;
5484         struct compound_hdr hdr;
5485         int status;
5486
5487         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5488         status = decode_compound_hdr(&xdr, &hdr);
5489         if (status)
5490                 goto out;
5491         status = decode_sequence(&xdr, &res->seq_res, req);
5492         if (status)
5493                 goto out;
5494         if ((status = decode_putfh(&xdr)) != 0)
5495                 goto out;
5496         if ((status = decode_lookup(&xdr)) != 0)
5497                 goto out;
5498         xdr_enter_page(&xdr, PAGE_SIZE);
5499         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5500                                  res->fs_locations->server,
5501                                  !RPC_IS_ASYNC(req->rq_task));
5502 out:
5503         return status;
5504 }
5505
5506 #if defined(CONFIG_NFS_V4_1)
5507 /*
5508  * EXCHANGE_ID request
5509  */
5510 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5511                                     void *res)
5512 {
5513         struct xdr_stream xdr;
5514         struct compound_hdr hdr;
5515         int status;
5516
5517         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5518         status = decode_compound_hdr(&xdr, &hdr);
5519         if (!status)
5520                 status = decode_exchange_id(&xdr, res);
5521         return status;
5522 }
5523
5524 /*
5525  * a CREATE_SESSION request
5526  */
5527 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5528                                        struct nfs41_create_session_res *res)
5529 {
5530         struct xdr_stream xdr;
5531         struct compound_hdr hdr;
5532         int status;
5533
5534         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5535         status = decode_compound_hdr(&xdr, &hdr);
5536         if (!status)
5537                 status = decode_create_session(&xdr, res);
5538         return status;
5539 }
5540
5541 /*
5542  * a DESTROY_SESSION request
5543  */
5544 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5545                                         void *dummy)
5546 {
5547         struct xdr_stream xdr;
5548         struct compound_hdr hdr;
5549         int status;
5550
5551         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5552         status = decode_compound_hdr(&xdr, &hdr);
5553         if (!status)
5554                 status = decode_destroy_session(&xdr, dummy);
5555         return status;
5556 }
5557
5558 /*
5559  * a SEQUENCE request
5560  */
5561 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5562                                  struct nfs4_sequence_res *res)
5563 {
5564         struct xdr_stream xdr;
5565         struct compound_hdr hdr;
5566         int status;
5567
5568         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5569         status = decode_compound_hdr(&xdr, &hdr);
5570         if (!status)
5571                 status = decode_sequence(&xdr, res, rqstp);
5572         return status;
5573 }
5574
5575 /*
5576  * a GET_LEASE_TIME request
5577  */
5578 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5579                                        struct nfs4_get_lease_time_res *res)
5580 {
5581         struct xdr_stream xdr;
5582         struct compound_hdr hdr;
5583         int status;
5584
5585         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5586         status = decode_compound_hdr(&xdr, &hdr);
5587         if (!status)
5588                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5589         if (!status)
5590                 status = decode_putrootfh(&xdr);
5591         if (!status)
5592                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5593         return status;
5594 }
5595 #endif /* CONFIG_NFS_V4_1 */
5596
5597 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5598 {
5599         uint32_t bitmap[2] = {0};
5600         uint32_t len;
5601
5602         if (!*p++) {
5603                 if (!*p)
5604                         return ERR_PTR(-EAGAIN);
5605                 entry->eof = 1;
5606                 return ERR_PTR(-EBADCOOKIE);
5607         }
5608
5609         entry->prev_cookie = entry->cookie;
5610         p = xdr_decode_hyper(p, &entry->cookie);
5611         entry->len = ntohl(*p++);
5612         entry->name = (const char *) p;
5613         p += XDR_QUADLEN(entry->len);
5614
5615         /*
5616          * In case the server doesn't return an inode number,
5617          * we fake one here.  (We don't use inode number 0,
5618          * since glibc seems to choke on it...)
5619          */
5620         entry->ino = 1;
5621
5622         len = ntohl(*p++);              /* bitmap length */
5623         if (len-- > 0) {
5624                 bitmap[0] = ntohl(*p++);
5625                 if (len-- > 0) {
5626                         bitmap[1] = ntohl(*p++);
5627                         p += len;
5628                 }
5629         }
5630         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5631         if (len > 0) {
5632                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5633                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5634                         /* Ignore the return value of rdattr_error for now */
5635                         p++;
5636                         len--;
5637                 }
5638                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5639                         xdr_decode_hyper(p, &entry->ino);
5640                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5641                         xdr_decode_hyper(p, &entry->ino);
5642                 p += len;
5643         }
5644
5645         entry->eof = !p[0] && p[1];
5646         return p;
5647 }
5648
5649 /*
5650  * We need to translate between nfs status return values and
5651  * the local errno values which may not be the same.
5652  */
5653 static struct {
5654         int stat;
5655         int errno;
5656 } nfs_errtbl[] = {
5657         { NFS4_OK,              0               },
5658         { NFS4ERR_PERM,         -EPERM          },
5659         { NFS4ERR_NOENT,        -ENOENT         },
5660         { NFS4ERR_IO,           -errno_NFSERR_IO},
5661         { NFS4ERR_NXIO,         -ENXIO          },
5662         { NFS4ERR_ACCESS,       -EACCES         },
5663         { NFS4ERR_EXIST,        -EEXIST         },
5664         { NFS4ERR_XDEV,         -EXDEV          },
5665         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5666         { NFS4ERR_ISDIR,        -EISDIR         },
5667         { NFS4ERR_INVAL,        -EINVAL         },
5668         { NFS4ERR_FBIG,         -EFBIG          },
5669         { NFS4ERR_NOSPC,        -ENOSPC         },
5670         { NFS4ERR_ROFS,         -EROFS          },
5671         { NFS4ERR_MLINK,        -EMLINK         },
5672         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5673         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5674         { NFS4ERR_DQUOT,        -EDQUOT         },
5675         { NFS4ERR_STALE,        -ESTALE         },
5676         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5677         { NFS4ERR_BADOWNER,     -EINVAL         },
5678         { NFS4ERR_BADNAME,      -EINVAL         },
5679         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5680         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5681         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5682         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5683         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5684         { NFS4ERR_LOCKED,       -EAGAIN         },
5685         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5686         { NFS4ERR_SYMLINK,      -ELOOP          },
5687         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5688         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5689         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5690                                                     * to be handled by a
5691                                                     * middle-layer.
5692                                                     */
5693         { -1,                   -EIO            }
5694 };
5695
5696 /*
5697  * Convert an NFS error code to a local one.
5698  * This one is used jointly by NFSv2 and NFSv3.
5699  */
5700 static int
5701 nfs4_stat_to_errno(int stat)
5702 {
5703         int i;
5704         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5705                 if (nfs_errtbl[i].stat == stat)
5706                         return nfs_errtbl[i].errno;
5707         }
5708         if (stat <= 10000 || stat > 10100) {
5709                 /* The server is looney tunes. */
5710                 return -ESERVERFAULT;
5711         }
5712         /* If we cannot translate the error, the recovery routines should
5713          * handle it.
5714          * Note: remaining NFSv4 error codes have values > 10000, so should
5715          * not conflict with native Linux error codes.
5716          */
5717         return -stat;
5718 }
5719
5720 #define PROC(proc, argtype, restype)                            \
5721 [NFSPROC4_CLNT_##proc] = {                                      \
5722         .p_proc   = NFSPROC4_COMPOUND,                          \
5723         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5724         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5725         .p_arglen = NFS4_##argtype##_sz,                        \
5726         .p_replen = NFS4_##restype##_sz,                        \
5727         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5728         .p_name   = #proc,                                      \
5729 }
5730
5731 struct rpc_procinfo     nfs4_procedures[] = {
5732   PROC(READ,            enc_read,       dec_read),
5733   PROC(WRITE,           enc_write,      dec_write),
5734   PROC(COMMIT,          enc_commit,     dec_commit),
5735   PROC(OPEN,            enc_open,       dec_open),
5736   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5737   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5738   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5739   PROC(CLOSE,           enc_close,      dec_close),
5740   PROC(SETATTR,         enc_setattr,    dec_setattr),
5741   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5742   PROC(RENEW,           enc_renew,      dec_renew),
5743   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5744   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5745   PROC(LOCK,            enc_lock,       dec_lock),
5746   PROC(LOCKT,           enc_lockt,      dec_lockt),
5747   PROC(LOCKU,           enc_locku,      dec_locku),
5748   PROC(ACCESS,          enc_access,     dec_access),
5749   PROC(GETATTR,         enc_getattr,    dec_getattr),
5750   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5751   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5752   PROC(REMOVE,          enc_remove,     dec_remove),
5753   PROC(RENAME,          enc_rename,     dec_rename),
5754   PROC(LINK,            enc_link,       dec_link),
5755   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5756   PROC(CREATE,          enc_create,     dec_create),
5757   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5758   PROC(STATFS,          enc_statfs,     dec_statfs),
5759   PROC(READLINK,        enc_readlink,   dec_readlink),
5760   PROC(READDIR,         enc_readdir,    dec_readdir),
5761   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5762   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5763   PROC(GETACL,          enc_getacl,     dec_getacl),
5764   PROC(SETACL,          enc_setacl,     dec_setacl),
5765   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5766 #if defined(CONFIG_NFS_V4_1)
5767   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5768   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5769   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5770   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5771   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5772 #endif /* CONFIG_NFS_V4_1 */
5773 };
5774
5775 struct rpc_version              nfs_version4 = {
5776         .number                 = 4,
5777         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5778         .procs                  = nfs4_procedures
5779 };
5780
5781 /*
5782  * Local variables:
5783  *  c-basic-offset: 8
5784  * End:
5785  */