SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 248 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 249 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 250                                 encode_putfh_maxsz + \
 251                                 encode_read_maxsz)
 252 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 253                                 decode_putfh_maxsz + \
 254                                 decode_read_maxsz)
 255 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 256                                 encode_putfh_maxsz + \
 257                                 encode_readlink_maxsz)
 258 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 259                                 decode_putfh_maxsz + \
 260                                 decode_readlink_maxsz)
 261 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 262                                 encode_putfh_maxsz + \
 263                                 encode_readdir_maxsz)
 264 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 265                                 decode_putfh_maxsz + \
 266                                 decode_readdir_maxsz)
 267 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 268                                 encode_putfh_maxsz + \
 269                                 encode_write_maxsz + \
 270                                 encode_getattr_maxsz)
 271 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 272                                 decode_putfh_maxsz + \
 273                                 decode_write_maxsz + \
 274                                 decode_getattr_maxsz)
 275 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 276                                 encode_putfh_maxsz + \
 277                                 encode_commit_maxsz + \
 278                                 encode_getattr_maxsz)
 279 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 280                                 decode_putfh_maxsz + \
 281                                 decode_commit_maxsz + \
 282                                 decode_getattr_maxsz)
 283 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 284                                 encode_putfh_maxsz + \
 285                                 encode_savefh_maxsz + \
 286                                 encode_open_maxsz + \
 287                                 encode_getfh_maxsz + \
 288                                 encode_getattr_maxsz + \
 289                                 encode_restorefh_maxsz + \
 290                                 encode_getattr_maxsz)
 291 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 292                                 decode_putfh_maxsz + \
 293                                 decode_savefh_maxsz + \
 294                                 decode_open_maxsz + \
 295                                 decode_getfh_maxsz + \
 296                                 decode_getattr_maxsz + \
 297                                 decode_restorefh_maxsz + \
 298                                 decode_getattr_maxsz)
 299 #define NFS4_enc_open_confirm_sz \
 300                                 (compound_encode_hdr_maxsz + \
 301                                  encode_putfh_maxsz + \
 302                                  encode_open_confirm_maxsz)
 303 #define NFS4_dec_open_confirm_sz \
 304                                 (compound_decode_hdr_maxsz + \
 305                                  decode_putfh_maxsz + \
 306                                  decode_open_confirm_maxsz)
 307 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 308                                         encode_putfh_maxsz + \
 309                                         encode_open_maxsz + \
 310                                         encode_getattr_maxsz)
 311 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 312                                         decode_putfh_maxsz + \
 313                                         decode_open_maxsz + \
 314                                         decode_getattr_maxsz)
 315 #define NFS4_enc_open_downgrade_sz \
 316                                 (compound_encode_hdr_maxsz + \
 317                                  encode_putfh_maxsz + \
 318                                  encode_open_downgrade_maxsz + \
 319                                  encode_getattr_maxsz)
 320 #define NFS4_dec_open_downgrade_sz \
 321                                 (compound_decode_hdr_maxsz + \
 322                                  decode_putfh_maxsz + \
 323                                  decode_open_downgrade_maxsz + \
 324                                  decode_getattr_maxsz)
 325 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 326                                  encode_putfh_maxsz + \
 327                                  encode_close_maxsz + \
 328                                  encode_getattr_maxsz)
 329 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 330                                  decode_putfh_maxsz + \
 331                                  decode_close_maxsz + \
 332                                  decode_getattr_maxsz)
 333 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 334                                  encode_putfh_maxsz + \
 335                                  encode_setattr_maxsz + \
 336                                  encode_getattr_maxsz)
 337 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 338                                  decode_putfh_maxsz + \
 339                                  decode_setattr_maxsz + \
 340                                  decode_getattr_maxsz)
 341 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 342                                 encode_putfh_maxsz + \
 343                                 encode_fsinfo_maxsz)
 344 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 345                                 decode_putfh_maxsz + \
 346                                 decode_fsinfo_maxsz)
 347 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 348                                 encode_renew_maxsz)
 349 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 350                                 decode_renew_maxsz)
 351 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 352                                 encode_setclientid_maxsz)
 353 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 354                                 decode_setclientid_maxsz)
 355 #define NFS4_enc_setclientid_confirm_sz \
 356                                 (compound_encode_hdr_maxsz + \
 357                                 encode_setclientid_confirm_maxsz + \
 358                                 encode_putrootfh_maxsz + \
 359                                 encode_fsinfo_maxsz)
 360 #define NFS4_dec_setclientid_confirm_sz \
 361                                 (compound_decode_hdr_maxsz + \
 362                                 decode_setclientid_confirm_maxsz + \
 363                                 decode_putrootfh_maxsz + \
 364                                 decode_fsinfo_maxsz)
 365 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_lock_maxsz)
 368 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 369                                 decode_putfh_maxsz + \
 370                                 decode_lock_maxsz)
 371 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 372                                 encode_putfh_maxsz + \
 373                                 encode_lockt_maxsz)
 374 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 375                                  decode_putfh_maxsz + \
 376                                  decode_lockt_maxsz)
 377 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_locku_maxsz)
 380 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_locku_maxsz)
 383 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_access_maxsz + \
 386                                 encode_getattr_maxsz)
 387 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 388                                 decode_putfh_maxsz + \
 389                                 decode_access_maxsz + \
 390                                 decode_getattr_maxsz)
 391 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 392                                 encode_putfh_maxsz + \
 393                                 encode_getattr_maxsz)
 394 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 395                                 decode_putfh_maxsz + \
 396                                 decode_getattr_maxsz)
 397 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 398                                 encode_putfh_maxsz + \
 399                                 encode_lookup_maxsz + \
 400                                 encode_getattr_maxsz + \
 401                                 encode_getfh_maxsz)
 402 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 403                                 decode_putfh_maxsz + \
 404                                 decode_lookup_maxsz + \
 405                                 decode_getattr_maxsz + \
 406                                 decode_getfh_maxsz)
 407 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 408                                 encode_putrootfh_maxsz + \
 409                                 encode_getattr_maxsz + \
 410                                 encode_getfh_maxsz)
 411 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 412                                 decode_putrootfh_maxsz + \
 413                                 decode_getattr_maxsz + \
 414                                 decode_getfh_maxsz)
 415 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 416                                 encode_putfh_maxsz + \
 417                                 encode_remove_maxsz + \
 418                                 encode_getattr_maxsz)
 419 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 420                                 decode_putfh_maxsz + \
 421                                 decode_remove_maxsz + \
 422                                 decode_getattr_maxsz)
 423 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_savefh_maxsz + \
 426                                 encode_putfh_maxsz + \
 427                                 encode_rename_maxsz + \
 428                                 encode_getattr_maxsz + \
 429                                 encode_restorefh_maxsz + \
 430                                 encode_getattr_maxsz)
 431 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 432                                 decode_putfh_maxsz + \
 433                                 decode_savefh_maxsz + \
 434                                 decode_putfh_maxsz + \
 435                                 decode_rename_maxsz + \
 436                                 decode_getattr_maxsz + \
 437                                 decode_restorefh_maxsz + \
 438                                 decode_getattr_maxsz)
 439 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 encode_savefh_maxsz + \
 442                                 encode_putfh_maxsz + \
 443                                 encode_link_maxsz + \
 444                                 decode_getattr_maxsz + \
 445                                 encode_restorefh_maxsz + \
 446                                 decode_getattr_maxsz)
 447 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 448                                 decode_putfh_maxsz + \
 449                                 decode_savefh_maxsz + \
 450                                 decode_putfh_maxsz + \
 451                                 decode_link_maxsz + \
 452                                 decode_getattr_maxsz + \
 453                                 decode_restorefh_maxsz + \
 454                                 decode_getattr_maxsz)
 455 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 456                                 encode_putfh_maxsz + \
 457                                 encode_symlink_maxsz + \
 458                                 encode_getattr_maxsz + \
 459                                 encode_getfh_maxsz)
 460 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_symlink_maxsz + \
 463                                 decode_getattr_maxsz + \
 464                                 decode_getfh_maxsz)
 465 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_savefh_maxsz + \
 468                                 encode_create_maxsz + \
 469                                 encode_getfh_maxsz + \
 470                                 encode_getattr_maxsz + \
 471                                 encode_restorefh_maxsz + \
 472                                 encode_getattr_maxsz)
 473 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 474                                 decode_putfh_maxsz + \
 475                                 decode_savefh_maxsz + \
 476                                 decode_create_maxsz + \
 477                                 decode_getfh_maxsz + \
 478                                 decode_getattr_maxsz + \
 479                                 decode_restorefh_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 482                                 encode_putfh_maxsz + \
 483                                 encode_getattr_maxsz)
 484 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 485                                 decode_putfh_maxsz + \
 486                                 decode_getattr_maxsz)
 487 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 488                                 encode_putfh_maxsz + \
 489                                 encode_statfs_maxsz)
 490 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 491                                 decode_putfh_maxsz + \
 492                                 decode_statfs_maxsz)
 493 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 494                                 encode_putfh_maxsz + \
 495                                 encode_getattr_maxsz)
 496 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 497                                 decode_putfh_maxsz + \
 498                                 decode_getattr_maxsz)
 499 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 500                                 encode_putfh_maxsz + \
 501                                 encode_delegreturn_maxsz + \
 502                                 encode_getattr_maxsz)
 503 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 504                                 decode_delegreturn_maxsz + \
 505                                 decode_getattr_maxsz)
 506 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 507                                 encode_putfh_maxsz + \
 508                                 encode_getacl_maxsz)
 509 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 510                                 decode_putfh_maxsz + \
 511                                 decode_getacl_maxsz)
 512 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_putfh_maxsz + \
 514                                 encode_setacl_maxsz)
 515 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 516                                 decode_putfh_maxsz + \
 517                                 decode_setacl_maxsz)
 518 #define NFS4_enc_fs_locations_sz \
 519                                 (compound_encode_hdr_maxsz + \
 520                                  encode_putfh_maxsz + \
 521                                  encode_lookup_maxsz + \
 522                                  encode_fs_locations_maxsz)
 523 #define NFS4_dec_fs_locations_sz \
 524                                 (compound_decode_hdr_maxsz + \
 525                                  decode_putfh_maxsz + \
 526                                  decode_lookup_maxsz + \
 527                                  decode_fs_locations_maxsz)
 528
 529 static const umode_t nfs_type2fmt[] = {
 530         [NF4BAD] = 0,
 531         [NF4REG] = S_IFREG,
 532         [NF4DIR] = S_IFDIR,
 533         [NF4BLK] = S_IFBLK,
 534         [NF4CHR] = S_IFCHR,
 535         [NF4LNK] = S_IFLNK,
 536         [NF4SOCK] = S_IFSOCK,
 537         [NF4FIFO] = S_IFIFO,
 538         [NF4ATTRDIR] = 0,
 539         [NF4NAMEDATTR] = 0,
 540 };
 541
 542 struct compound_hdr {
 543         int32_t         status;
 544         uint32_t        nops;
 545         __be32 *        nops_p;
 546         uint32_t        taglen;
 547         char *          tag;
 548         uint32_t        replen;         /* expected reply words */
 549 };
 550
 551 /*
 552  * START OF "GENERIC" ENCODE ROUTINES.
 553  *   These may look a little ugly since they are imported from a "generic"
 554  * set of XDR encode/decode routines which are intended to be shared by
 555  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 556  *
 557  * If the pain of reading these is too great, it should be a straightforward
 558  * task to translate them into Linux-specific versions which are more
 559  * consistent with the style used in NFSv2/v3...
 560  */
 561 #define WRITE32(n)               *p++ = htonl(n)
 562 #define WRITE64(n)               do {                           \
 563         *p++ = htonl((uint32_t)((n) >> 32));                            \
 564         *p++ = htonl((uint32_t)(n));                                    \
 565 } while (0)
 566 #define WRITEMEM(ptr,nbytes)     do {                           \
 567         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 568 } while (0)
 569
 570 #define RESERVE_SPACE(nbytes)   do {                            \
 571         p = xdr_reserve_space(xdr, nbytes);                     \
 572         BUG_ON(!p);                                             \
 573 } while (0)
 574
 575 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 576 {
 577         __be32 *p;
 578
 579         p = xdr_reserve_space(xdr, 4 + len);
 580         BUG_ON(p == NULL);
 581         xdr_encode_opaque(p, str, len);
 582 }
 583
 584 static void encode_compound_hdr(struct xdr_stream *xdr,
 585                                 struct rpc_rqst *req,
 586                                 struct compound_hdr *hdr)
 587 {
 588         __be32 *p;
 589         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 590
 591         /* initialize running count of expected bytes in reply.
 592          * NOTE: the replied tag SHOULD be the same is the one sent,
 593          * but this is not required as a MUST for the server to do so. */
 594         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 595
 596         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 597         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 598         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 599         WRITE32(hdr->taglen);
 600         WRITEMEM(hdr->tag, hdr->taglen);
 601         WRITE32(NFS4_MINOR_VERSION);
 602         hdr->nops_p = p;
 603         WRITE32(hdr->nops);
 604 }
 605
 606 static void encode_nops(struct compound_hdr *hdr)
 607 {
 608         *hdr->nops_p = htonl(hdr->nops);
 609 }
 610
 611 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 612 {
 613         __be32 *p;
 614
 615         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 616         BUG_ON(p == NULL);
 617         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 618 }
 619
 620 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 621 {
 622         char owner_name[IDMAP_NAMESZ];
 623         char owner_group[IDMAP_NAMESZ];
 624         int owner_namelen = 0;
 625         int owner_grouplen = 0;
 626         __be32 *p;
 627         __be32 *q;
 628         int len;
 629         uint32_t bmval0 = 0;
 630         uint32_t bmval1 = 0;
 631
 632         /*
 633          * We reserve enough space to write the entire attribute buffer at once.
 634          * In the worst-case, this would be
 635          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 636          *          = 36 bytes, plus any contribution from variable-length fields
 637          *            such as owner/group.
 638          */
 639         len = 16;
 640
 641         /* Sigh */
 642         if (iap->ia_valid & ATTR_SIZE)
 643                 len += 8;
 644         if (iap->ia_valid & ATTR_MODE)
 645                 len += 4;
 646         if (iap->ia_valid & ATTR_UID) {
 647                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 648                 if (owner_namelen < 0) {
 649                         dprintk("nfs: couldn't resolve uid %d to string\n",
 650                                         iap->ia_uid);
 651                         /* XXX */
 652                         strcpy(owner_name, "nobody");
 653                         owner_namelen = sizeof("nobody") - 1;
 654                         /* goto out; */
 655                 }
 656                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 657         }
 658         if (iap->ia_valid & ATTR_GID) {
 659                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 660                 if (owner_grouplen < 0) {
 661                         dprintk("nfs: couldn't resolve gid %d to string\n",
 662                                         iap->ia_gid);
 663                         strcpy(owner_group, "nobody");
 664                         owner_grouplen = sizeof("nobody") - 1;
 665                         /* goto out; */
 666                 }
 667                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 668         }
 669         if (iap->ia_valid & ATTR_ATIME_SET)
 670                 len += 16;
 671         else if (iap->ia_valid & ATTR_ATIME)
 672                 len += 4;
 673         if (iap->ia_valid & ATTR_MTIME_SET)
 674                 len += 16;
 675         else if (iap->ia_valid & ATTR_MTIME)
 676                 len += 4;
 677         RESERVE_SPACE(len);
 678
 679         /*
 680          * We write the bitmap length now, but leave the bitmap and the attribute
 681          * buffer length to be backfilled at the end of this routine.
 682          */
 683         WRITE32(2);
 684         q = p;
 685         p += 3;
 686
 687         if (iap->ia_valid & ATTR_SIZE) {
 688                 bmval0 |= FATTR4_WORD0_SIZE;
 689                 WRITE64(iap->ia_size);
 690         }
 691         if (iap->ia_valid & ATTR_MODE) {
 692                 bmval1 |= FATTR4_WORD1_MODE;
 693                 WRITE32(iap->ia_mode & S_IALLUGO);
 694         }
 695         if (iap->ia_valid & ATTR_UID) {
 696                 bmval1 |= FATTR4_WORD1_OWNER;
 697                 WRITE32(owner_namelen);
 698                 WRITEMEM(owner_name, owner_namelen);
 699         }
 700         if (iap->ia_valid & ATTR_GID) {
 701                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 702                 WRITE32(owner_grouplen);
 703                 WRITEMEM(owner_group, owner_grouplen);
 704         }
 705         if (iap->ia_valid & ATTR_ATIME_SET) {
 706                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 707                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 708                 WRITE32(0);
 709                 WRITE32(iap->ia_mtime.tv_sec);
 710                 WRITE32(iap->ia_mtime.tv_nsec);
 711         }
 712         else if (iap->ia_valid & ATTR_ATIME) {
 713                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 714                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 715         }
 716         if (iap->ia_valid & ATTR_MTIME_SET) {
 717                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 718                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 719                 WRITE32(0);
 720                 WRITE32(iap->ia_mtime.tv_sec);
 721                 WRITE32(iap->ia_mtime.tv_nsec);
 722         }
 723         else if (iap->ia_valid & ATTR_MTIME) {
 724                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 725                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 726         }
 727
 728         /*
 729          * Now we backfill the bitmap and the attribute buffer length.
 730          */
 731         if (len != ((char *)p - (char *)q) + 4) {
 732                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 733                                 len, ((char *)p - (char *)q) + 4);
 734                 BUG();
 735         }
 736         len = (char *)p - (char *)q - 12;
 737         *q++ = htonl(bmval0);
 738         *q++ = htonl(bmval1);
 739         *q++ = htonl(len);
 740
 741 /* out: */
 742 }
 743
 744 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 745 {
 746         __be32 *p;
 747
 748         RESERVE_SPACE(8);
 749         WRITE32(OP_ACCESS);
 750         WRITE32(access);
 751         hdr->nops++;
 752         hdr->replen += decode_access_maxsz;
 753 }
 754
 755 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 756 {
 757         __be32 *p;
 758
 759         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 760         WRITE32(OP_CLOSE);
 761         WRITE32(arg->seqid->sequence->counter);
 762         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 763         hdr->nops++;
 764         hdr->replen += decode_close_maxsz;
 765 }
 766
 767 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 768 {
 769         __be32 *p;
 770
 771         RESERVE_SPACE(16);
 772         WRITE32(OP_COMMIT);
 773         WRITE64(args->offset);
 774         WRITE32(args->count);
 775         hdr->nops++;
 776         hdr->replen += decode_commit_maxsz;
 777 }
 778
 779 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 780 {
 781         __be32 *p;
 782
 783         RESERVE_SPACE(8);
 784         WRITE32(OP_CREATE);
 785         WRITE32(create->ftype);
 786
 787         switch (create->ftype) {
 788         case NF4LNK:
 789                 RESERVE_SPACE(4);
 790                 WRITE32(create->u.symlink.len);
 791                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 792                 break;
 793
 794         case NF4BLK: case NF4CHR:
 795                 RESERVE_SPACE(8);
 796                 WRITE32(create->u.device.specdata1);
 797                 WRITE32(create->u.device.specdata2);
 798                 break;
 799
 800         default:
 801                 break;
 802         }
 803
 804         RESERVE_SPACE(4 + create->name->len);
 805         WRITE32(create->name->len);
 806         WRITEMEM(create->name->name, create->name->len);
 807         hdr->nops++;
 808         hdr->replen += decode_create_maxsz;
 809
 810         encode_attrs(xdr, create->attrs, create->server);
 811 }
 812
 813 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 814 {
 815         __be32 *p;
 816
 817         RESERVE_SPACE(12);
 818         WRITE32(OP_GETATTR);
 819         WRITE32(1);
 820         WRITE32(bitmap);
 821         hdr->nops++;
 822         hdr->replen += decode_getattr_maxsz;
 823 }
 824
 825 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 826 {
 827         __be32 *p;
 828
 829         RESERVE_SPACE(16);
 830         WRITE32(OP_GETATTR);
 831         WRITE32(2);
 832         WRITE32(bm0);
 833         WRITE32(bm1);
 834         hdr->nops++;
 835         hdr->replen += decode_getattr_maxsz;
 836 }
 837
 838 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 839 {
 840         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 841                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 842 }
 843
 844 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 845 {
 846         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 847                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 848 }
 849
 850 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 851 {
 852         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 853                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 854 }
 855
 856 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 857 {
 858         __be32 *p;
 859
 860         RESERVE_SPACE(4);
 861         WRITE32(OP_GETFH);
 862         hdr->nops++;
 863         hdr->replen += decode_getfh_maxsz;
 864 }
 865
 866 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 867 {
 868         __be32 *p;
 869
 870         RESERVE_SPACE(8 + name->len);
 871         WRITE32(OP_LINK);
 872         WRITE32(name->len);
 873         WRITEMEM(name->name, name->len);
 874         hdr->nops++;
 875         hdr->replen += decode_link_maxsz;
 876 }
 877
 878 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 879 {
 880         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 881                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 882         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 883 }
 884
 885 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 886 {
 887         if (fl->fl_end == OFFSET_MAX)
 888                 return ~(uint64_t)0;
 889         return fl->fl_end - fl->fl_start + 1;
 890 }
 891
 892 /*
 893  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 894  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 895  */
 896 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 897 {
 898         __be32 *p;
 899
 900         RESERVE_SPACE(32);
 901         WRITE32(OP_LOCK);
 902         WRITE32(nfs4_lock_type(args->fl, args->block));
 903         WRITE32(args->reclaim);
 904         WRITE64(args->fl->fl_start);
 905         WRITE64(nfs4_lock_length(args->fl));
 906         WRITE32(args->new_lock_owner);
 907         if (args->new_lock_owner){
 908                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 909                 WRITE32(args->open_seqid->sequence->counter);
 910                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 911                 WRITE32(args->lock_seqid->sequence->counter);
 912                 WRITE64(args->lock_owner.clientid);
 913                 WRITE32(16);
 914                 WRITEMEM("lock id:", 8);
 915                 WRITE64(args->lock_owner.id);
 916         }
 917         else {
 918                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 919                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 920                 WRITE32(args->lock_seqid->sequence->counter);
 921         }
 922         hdr->nops++;
 923         hdr->replen += decode_lock_maxsz;
 924 }
 925
 926 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 927 {
 928         __be32 *p;
 929
 930         RESERVE_SPACE(52);
 931         WRITE32(OP_LOCKT);
 932         WRITE32(nfs4_lock_type(args->fl, 0));
 933         WRITE64(args->fl->fl_start);
 934         WRITE64(nfs4_lock_length(args->fl));
 935         WRITE64(args->lock_owner.clientid);
 936         WRITE32(16);
 937         WRITEMEM("lock id:", 8);
 938         WRITE64(args->lock_owner.id);
 939         hdr->nops++;
 940         hdr->replen += decode_lockt_maxsz;
 941 }
 942
 943 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 944 {
 945         __be32 *p;
 946
 947         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 948         WRITE32(OP_LOCKU);
 949         WRITE32(nfs4_lock_type(args->fl, 0));
 950         WRITE32(args->seqid->sequence->counter);
 951         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 952         WRITE64(args->fl->fl_start);
 953         WRITE64(nfs4_lock_length(args->fl));
 954         hdr->nops++;
 955         hdr->replen += decode_locku_maxsz;
 956 }
 957
 958 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 959 {
 960         int len = name->len;
 961         __be32 *p;
 962
 963         RESERVE_SPACE(8 + len);
 964         WRITE32(OP_LOOKUP);
 965         WRITE32(len);
 966         WRITEMEM(name->name, len);
 967         hdr->nops++;
 968         hdr->replen += decode_lookup_maxsz;
 969 }
 970
 971 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 972 {
 973         __be32 *p;
 974
 975         RESERVE_SPACE(8);
 976         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 977         case FMODE_READ:
 978                 WRITE32(NFS4_SHARE_ACCESS_READ);
 979                 break;
 980         case FMODE_WRITE:
 981                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 982                 break;
 983         case FMODE_READ|FMODE_WRITE:
 984                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 985                 break;
 986         default:
 987                 WRITE32(0);
 988         }
 989         WRITE32(0);             /* for linux, share_deny = 0 always */
 990 }
 991
 992 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 993 {
 994         __be32 *p;
 995  /*
 996  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 997  * owner 4 = 32
 998  */
 999         RESERVE_SPACE(8);
1000         WRITE32(OP_OPEN);
1001         WRITE32(arg->seqid->sequence->counter);
1002         encode_share_access(xdr, arg->fmode);
1003         RESERVE_SPACE(28);
1004         WRITE64(arg->clientid);
1005         WRITE32(16);
1006         WRITEMEM("open id:", 8);
1007         WRITE64(arg->id);
1008 }
1009
1010 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1011 {
1012         __be32 *p;
1013
1014         RESERVE_SPACE(4);
1015         switch(arg->open_flags & O_EXCL) {
1016         case 0:
1017                 WRITE32(NFS4_CREATE_UNCHECKED);
1018                 encode_attrs(xdr, arg->u.attrs, arg->server);
1019                 break;
1020         default:
1021                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1022                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1023         }
1024 }
1025
1026 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1027 {
1028         __be32 *p;
1029
1030         RESERVE_SPACE(4);
1031         switch (arg->open_flags & O_CREAT) {
1032         case 0:
1033                 WRITE32(NFS4_OPEN_NOCREATE);
1034                 break;
1035         default:
1036                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1037                 WRITE32(NFS4_OPEN_CREATE);
1038                 encode_createmode(xdr, arg);
1039         }
1040 }
1041
1042 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1043 {
1044         __be32 *p;
1045
1046         RESERVE_SPACE(4);
1047         switch (delegation_type) {
1048         case 0:
1049                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1050                 break;
1051         case FMODE_READ:
1052                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1053                 break;
1054         case FMODE_WRITE|FMODE_READ:
1055                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1056                 break;
1057         default:
1058                 BUG();
1059         }
1060 }
1061
1062 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1063 {
1064         __be32 *p;
1065
1066         RESERVE_SPACE(4);
1067         WRITE32(NFS4_OPEN_CLAIM_NULL);
1068         encode_string(xdr, name->len, name->name);
1069 }
1070
1071 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1072 {
1073         __be32 *p;
1074
1075         RESERVE_SPACE(4);
1076         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1077         encode_delegation_type(xdr, type);
1078 }
1079
1080 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1081 {
1082         __be32 *p;
1083
1084         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1085         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1086         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1087         encode_string(xdr, name->len, name->name);
1088 }
1089
1090 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1091 {
1092         encode_openhdr(xdr, arg);
1093         encode_opentype(xdr, arg);
1094         switch (arg->claim) {
1095         case NFS4_OPEN_CLAIM_NULL:
1096                 encode_claim_null(xdr, arg->name);
1097                 break;
1098         case NFS4_OPEN_CLAIM_PREVIOUS:
1099                 encode_claim_previous(xdr, arg->u.delegation_type);
1100                 break;
1101         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1102                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1103                 break;
1104         default:
1105                 BUG();
1106         }
1107         hdr->nops++;
1108         hdr->replen += decode_open_maxsz;
1109 }
1110
1111 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1112 {
1113         __be32 *p;
1114
1115         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1116         WRITE32(OP_OPEN_CONFIRM);
1117         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1118         WRITE32(arg->seqid->sequence->counter);
1119         hdr->nops++;
1120         hdr->replen += decode_open_confirm_maxsz;
1121 }
1122
1123 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1124 {
1125         __be32 *p;
1126
1127         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1128         WRITE32(OP_OPEN_DOWNGRADE);
1129         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1130         WRITE32(arg->seqid->sequence->counter);
1131         encode_share_access(xdr, arg->fmode);
1132         hdr->nops++;
1133         hdr->replen += decode_open_downgrade_maxsz;
1134 }
1135
1136 static void
1137 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1138 {
1139         int len = fh->size;
1140         __be32 *p;
1141
1142         RESERVE_SPACE(8 + len);
1143         WRITE32(OP_PUTFH);
1144         WRITE32(len);
1145         WRITEMEM(fh->data, len);
1146         hdr->nops++;
1147         hdr->replen += decode_putfh_maxsz;
1148 }
1149
1150 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1151 {
1152         __be32 *p;
1153
1154         RESERVE_SPACE(4);
1155         WRITE32(OP_PUTROOTFH);
1156         hdr->nops++;
1157         hdr->replen += decode_putrootfh_maxsz;
1158 }
1159
1160 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1161 {
1162         nfs4_stateid stateid;
1163         __be32 *p;
1164
1165         RESERVE_SPACE(NFS4_STATEID_SIZE);
1166         if (ctx->state != NULL) {
1167                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1168                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1169         } else
1170                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1171 }
1172
1173 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1174 {
1175         __be32 *p;
1176
1177         RESERVE_SPACE(4);
1178         WRITE32(OP_READ);
1179
1180         encode_stateid(xdr, args->context);
1181
1182         RESERVE_SPACE(12);
1183         WRITE64(args->offset);
1184         WRITE32(args->count);
1185         hdr->nops++;
1186         hdr->replen += decode_read_maxsz;
1187 }
1188
1189 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1190 {
1191         uint32_t attrs[2] = {
1192                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1193                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1194         };
1195         __be32 *p;
1196
1197         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1198         WRITE32(OP_READDIR);
1199         WRITE64(readdir->cookie);
1200         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1201         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1202         WRITE32(readdir->count);
1203         WRITE32(2);
1204         /* Switch to mounted_on_fileid if the server supports it */
1205         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1206                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1207         else
1208                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1209         WRITE32(attrs[0] & readdir->bitmask[0]);
1210         WRITE32(attrs[1] & readdir->bitmask[1]);
1211         hdr->nops++;
1212         hdr->replen += decode_readdir_maxsz;
1213         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1214                         __func__,
1215                         (unsigned long long)readdir->cookie,
1216                         ((u32 *)readdir->verifier.data)[0],
1217                         ((u32 *)readdir->verifier.data)[1],
1218                         attrs[0] & readdir->bitmask[0],
1219                         attrs[1] & readdir->bitmask[1]);
1220 }
1221
1222 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1223 {
1224         __be32 *p;
1225
1226         RESERVE_SPACE(4);
1227         WRITE32(OP_READLINK);
1228         hdr->nops++;
1229         hdr->replen += decode_readlink_maxsz;
1230 }
1231
1232 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1233 {
1234         __be32 *p;
1235
1236         RESERVE_SPACE(8 + name->len);
1237         WRITE32(OP_REMOVE);
1238         WRITE32(name->len);
1239         WRITEMEM(name->name, name->len);
1240         hdr->nops++;
1241         hdr->replen += decode_remove_maxsz;
1242 }
1243
1244 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1245 {
1246         __be32 *p;
1247
1248         RESERVE_SPACE(8 + oldname->len);
1249         WRITE32(OP_RENAME);
1250         WRITE32(oldname->len);
1251         WRITEMEM(oldname->name, oldname->len);
1252
1253         RESERVE_SPACE(4 + newname->len);
1254         WRITE32(newname->len);
1255         WRITEMEM(newname->name, newname->len);
1256         hdr->nops++;
1257         hdr->replen += decode_rename_maxsz;
1258 }
1259
1260 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1261 {
1262         __be32 *p;
1263
1264         RESERVE_SPACE(12);
1265         WRITE32(OP_RENEW);
1266         WRITE64(client_stateid->cl_clientid);
1267         hdr->nops++;
1268         hdr->replen += decode_renew_maxsz;
1269 }
1270
1271 static void
1272 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         RESERVE_SPACE(4);
1277         WRITE32(OP_RESTOREFH);
1278         hdr->nops++;
1279         hdr->replen += decode_restorefh_maxsz;
1280 }
1281
1282 static int
1283 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1284 {
1285         __be32 *p;
1286
1287         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1288         WRITE32(OP_SETATTR);
1289         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1290         RESERVE_SPACE(2*4);
1291         WRITE32(1);
1292         WRITE32(FATTR4_WORD0_ACL);
1293         if (arg->acl_len % 4)
1294                 return -EINVAL;
1295         RESERVE_SPACE(4);
1296         WRITE32(arg->acl_len);
1297         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1298         hdr->nops++;
1299         hdr->replen += decode_setacl_maxsz;
1300         return 0;
1301 }
1302
1303 static void
1304 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1305 {
1306         __be32 *p;
1307
1308         RESERVE_SPACE(4);
1309         WRITE32(OP_SAVEFH);
1310         hdr->nops++;
1311         hdr->replen += decode_savefh_maxsz;
1312 }
1313
1314 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1315 {
1316         __be32 *p;
1317
1318         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1319         WRITE32(OP_SETATTR);
1320         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1321         hdr->nops++;
1322         hdr->replen += decode_setattr_maxsz;
1323         encode_attrs(xdr, arg->iap, server);
1324 }
1325
1326 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1327 {
1328         __be32 *p;
1329
1330         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1331         WRITE32(OP_SETCLIENTID);
1332         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1333
1334         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1335         RESERVE_SPACE(4);
1336         WRITE32(setclientid->sc_prog);
1337         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1338         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1339         RESERVE_SPACE(4);
1340         WRITE32(setclientid->sc_cb_ident);
1341         hdr->nops++;
1342         hdr->replen += decode_setclientid_maxsz;
1343 }
1344
1345 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1346 {
1347         __be32 *p;
1348
1349         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1350         WRITE32(OP_SETCLIENTID_CONFIRM);
1351         WRITE64(client_state->cl_clientid);
1352         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1353         hdr->nops++;
1354         hdr->replen += decode_setclientid_confirm_maxsz;
1355 }
1356
1357 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1358 {
1359         __be32 *p;
1360
1361         RESERVE_SPACE(4);
1362         WRITE32(OP_WRITE);
1363
1364         encode_stateid(xdr, args->context);
1365
1366         RESERVE_SPACE(16);
1367         WRITE64(args->offset);
1368         WRITE32(args->stable);
1369         WRITE32(args->count);
1370
1371         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1372         hdr->nops++;
1373         hdr->replen += decode_write_maxsz;
1374 }
1375
1376 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1377 {
1378         __be32 *p;
1379
1380         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1381
1382         WRITE32(OP_DELEGRETURN);
1383         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1384         hdr->nops++;
1385         hdr->replen += decode_delegreturn_maxsz;
1386 }
1387 /*
1388  * END OF "GENERIC" ENCODE ROUTINES.
1389  */
1390
1391 /*
1392  * Encode an ACCESS request
1393  */
1394 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1395 {
1396         struct xdr_stream xdr;
1397         struct compound_hdr hdr = {
1398                 .nops = 0,
1399         };
1400
1401         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1402         encode_compound_hdr(&xdr, req, &hdr);
1403         encode_putfh(&xdr, args->fh, &hdr);
1404         encode_access(&xdr, args->access, &hdr);
1405         encode_getfattr(&xdr, args->bitmask, &hdr);
1406         encode_nops(&hdr);
1407         return 0;
1408 }
1409
1410 /*
1411  * Encode LOOKUP request
1412  */
1413 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1414 {
1415         struct xdr_stream xdr;
1416         struct compound_hdr hdr = {
1417                 .nops = 0,
1418         };
1419
1420         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1421         encode_compound_hdr(&xdr, req, &hdr);
1422         encode_putfh(&xdr, args->dir_fh, &hdr);
1423         encode_lookup(&xdr, args->name, &hdr);
1424         encode_getfh(&xdr, &hdr);
1425         encode_getfattr(&xdr, args->bitmask, &hdr);
1426         encode_nops(&hdr);
1427         return 0;
1428 }
1429
1430 /*
1431  * Encode LOOKUP_ROOT request
1432  */
1433 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1434 {
1435         struct xdr_stream xdr;
1436         struct compound_hdr hdr = {
1437                 .nops = 0,
1438         };
1439
1440         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1441         encode_compound_hdr(&xdr, req, &hdr);
1442         encode_putrootfh(&xdr, &hdr);
1443         encode_getfh(&xdr, &hdr);
1444         encode_getfattr(&xdr, args->bitmask, &hdr);
1445         encode_nops(&hdr);
1446         return 0;
1447 }
1448
1449 /*
1450  * Encode REMOVE request
1451  */
1452 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1453 {
1454         struct xdr_stream xdr;
1455         struct compound_hdr hdr = {
1456                 .nops = 0,
1457         };
1458
1459         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1460         encode_compound_hdr(&xdr, req, &hdr);
1461         encode_putfh(&xdr, args->fh, &hdr);
1462         encode_remove(&xdr, &args->name, &hdr);
1463         encode_getfattr(&xdr, args->bitmask, &hdr);
1464         encode_nops(&hdr);
1465         return 0;
1466 }
1467
1468 /*
1469  * Encode RENAME request
1470  */
1471 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1472 {
1473         struct xdr_stream xdr;
1474         struct compound_hdr hdr = {
1475                 .nops = 0,
1476         };
1477
1478         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1479         encode_compound_hdr(&xdr, req, &hdr);
1480         encode_putfh(&xdr, args->old_dir, &hdr);
1481         encode_savefh(&xdr, &hdr);
1482         encode_putfh(&xdr, args->new_dir, &hdr);
1483         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1484         encode_getfattr(&xdr, args->bitmask, &hdr);
1485         encode_restorefh(&xdr, &hdr);
1486         encode_getfattr(&xdr, args->bitmask, &hdr);
1487         encode_nops(&hdr);
1488         return 0;
1489 }
1490
1491 /*
1492  * Encode LINK request
1493  */
1494 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1495 {
1496         struct xdr_stream xdr;
1497         struct compound_hdr hdr = {
1498                 .nops = 0,
1499         };
1500
1501         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1502         encode_compound_hdr(&xdr, req, &hdr);
1503         encode_putfh(&xdr, args->fh, &hdr);
1504         encode_savefh(&xdr, &hdr);
1505         encode_putfh(&xdr, args->dir_fh, &hdr);
1506         encode_link(&xdr, args->name, &hdr);
1507         encode_getfattr(&xdr, args->bitmask, &hdr);
1508         encode_restorefh(&xdr, &hdr);
1509         encode_getfattr(&xdr, args->bitmask, &hdr);
1510         encode_nops(&hdr);
1511         return 0;
1512 }
1513
1514 /*
1515  * Encode CREATE request
1516  */
1517 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1518 {
1519         struct xdr_stream xdr;
1520         struct compound_hdr hdr = {
1521                 .nops = 0,
1522         };
1523
1524         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1525         encode_compound_hdr(&xdr, req, &hdr);
1526         encode_putfh(&xdr, args->dir_fh, &hdr);
1527         encode_savefh(&xdr, &hdr);
1528         encode_create(&xdr, args, &hdr);
1529         encode_getfh(&xdr, &hdr);
1530         encode_getfattr(&xdr, args->bitmask, &hdr);
1531         encode_restorefh(&xdr, &hdr);
1532         encode_getfattr(&xdr, args->bitmask, &hdr);
1533         encode_nops(&hdr);
1534         return 0;
1535 }
1536
1537 /*
1538  * Encode SYMLINK request
1539  */
1540 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1541 {
1542         return nfs4_xdr_enc_create(req, p, args);
1543 }
1544
1545 /*
1546  * Encode GETATTR request
1547  */
1548 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1549 {
1550         struct xdr_stream xdr;
1551         struct compound_hdr hdr = {
1552                 .nops = 0,
1553         };
1554
1555         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1556         encode_compound_hdr(&xdr, req, &hdr);
1557         encode_putfh(&xdr, args->fh, &hdr);
1558         encode_getfattr(&xdr, args->bitmask, &hdr);
1559         encode_nops(&hdr);
1560         return 0;
1561 }
1562
1563 /*
1564  * Encode a CLOSE request
1565  */
1566 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1567 {
1568         struct xdr_stream xdr;
1569         struct compound_hdr hdr = {
1570                 .nops   = 0,
1571         };
1572
1573         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1574         encode_compound_hdr(&xdr, req, &hdr);
1575         encode_putfh(&xdr, args->fh, &hdr);
1576         encode_close(&xdr, args, &hdr);
1577         encode_getfattr(&xdr, args->bitmask, &hdr);
1578         encode_nops(&hdr);
1579         return 0;
1580 }
1581
1582 /*
1583  * Encode an OPEN request
1584  */
1585 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1586 {
1587         struct xdr_stream xdr;
1588         struct compound_hdr hdr = {
1589                 .nops = 0,
1590         };
1591
1592         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1593         encode_compound_hdr(&xdr, req, &hdr);
1594         encode_putfh(&xdr, args->fh, &hdr);
1595         encode_savefh(&xdr, &hdr);
1596         encode_open(&xdr, args, &hdr);
1597         encode_getfh(&xdr, &hdr);
1598         encode_getfattr(&xdr, args->bitmask, &hdr);
1599         encode_restorefh(&xdr, &hdr);
1600         encode_getfattr(&xdr, args->bitmask, &hdr);
1601         encode_nops(&hdr);
1602         return 0;
1603 }
1604
1605 /*
1606  * Encode an OPEN_CONFIRM request
1607  */
1608 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1609 {
1610         struct xdr_stream xdr;
1611         struct compound_hdr hdr = {
1612                 .nops   = 0,
1613         };
1614
1615         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1616         encode_compound_hdr(&xdr, req, &hdr);
1617         encode_putfh(&xdr, args->fh, &hdr);
1618         encode_open_confirm(&xdr, args, &hdr);
1619         encode_nops(&hdr);
1620         return 0;
1621 }
1622
1623 /*
1624  * Encode an OPEN request with no attributes.
1625  */
1626 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1627 {
1628         struct xdr_stream xdr;
1629         struct compound_hdr hdr = {
1630                 .nops   = 0,
1631         };
1632
1633         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1634         encode_compound_hdr(&xdr, req, &hdr);
1635         encode_putfh(&xdr, args->fh, &hdr);
1636         encode_open(&xdr, args, &hdr);
1637         encode_getfattr(&xdr, args->bitmask, &hdr);
1638         encode_nops(&hdr);
1639         return 0;
1640 }
1641
1642 /*
1643  * Encode an OPEN_DOWNGRADE request
1644  */
1645 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1646 {
1647         struct xdr_stream xdr;
1648         struct compound_hdr hdr = {
1649                 .nops   = 0,
1650         };
1651
1652         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1653         encode_compound_hdr(&xdr, req, &hdr);
1654         encode_putfh(&xdr, args->fh, &hdr);
1655         encode_open_downgrade(&xdr, args, &hdr);
1656         encode_getfattr(&xdr, args->bitmask, &hdr);
1657         encode_nops(&hdr);
1658         return 0;
1659 }
1660
1661 /*
1662  * Encode a LOCK request
1663  */
1664 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1665 {
1666         struct xdr_stream xdr;
1667         struct compound_hdr hdr = {
1668                 .nops   = 0,
1669         };
1670
1671         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1672         encode_compound_hdr(&xdr, req, &hdr);
1673         encode_putfh(&xdr, args->fh, &hdr);
1674         encode_lock(&xdr, args, &hdr);
1675         encode_nops(&hdr);
1676         return 0;
1677 }
1678
1679 /*
1680  * Encode a LOCKT request
1681  */
1682 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1683 {
1684         struct xdr_stream xdr;
1685         struct compound_hdr hdr = {
1686                 .nops   = 0,
1687         };
1688
1689         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1690         encode_compound_hdr(&xdr, req, &hdr);
1691         encode_putfh(&xdr, args->fh, &hdr);
1692         encode_lockt(&xdr, args, &hdr);
1693         encode_nops(&hdr);
1694         return 0;
1695 }
1696
1697 /*
1698  * Encode a LOCKU request
1699  */
1700 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1701 {
1702         struct xdr_stream xdr;
1703         struct compound_hdr hdr = {
1704                 .nops   = 0,
1705         };
1706
1707         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1708         encode_compound_hdr(&xdr, req, &hdr);
1709         encode_putfh(&xdr, args->fh, &hdr);
1710         encode_locku(&xdr, args, &hdr);
1711         encode_nops(&hdr);
1712         return 0;
1713 }
1714
1715 /*
1716  * Encode a READLINK request
1717  */
1718 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1719 {
1720         struct xdr_stream xdr;
1721         struct compound_hdr hdr = {
1722                 .nops = 0,
1723         };
1724         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1725         unsigned int replen;
1726
1727         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1728         encode_compound_hdr(&xdr, req, &hdr);
1729         encode_putfh(&xdr, args->fh, &hdr);
1730         encode_readlink(&xdr, args, req, &hdr);
1731
1732         /* set up reply kvec
1733          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1734          *      + OP_READLINK + status + string length = 8
1735          */
1736         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1737         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1738                         args->pgbase, args->pglen);
1739         encode_nops(&hdr);
1740         return 0;
1741 }
1742
1743 /*
1744  * Encode a READDIR request
1745  */
1746 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1747 {
1748         struct xdr_stream xdr;
1749         struct compound_hdr hdr = {
1750                 .nops = 0,
1751         };
1752         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1753         int replen;
1754
1755         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1756         encode_compound_hdr(&xdr, req, &hdr);
1757         encode_putfh(&xdr, args->fh, &hdr);
1758         encode_readdir(&xdr, args, req, &hdr);
1759
1760         /* set up reply kvec
1761          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1762          *      + OP_READDIR + status + verifer(2)  = 9
1763          */
1764         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1765         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1766                          args->pgbase, args->count);
1767         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1768                         __func__, replen, args->pages,
1769                         args->pgbase, args->count);
1770         encode_nops(&hdr);
1771         return 0;
1772 }
1773
1774 /*
1775  * Encode a READ request
1776  */
1777 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1778 {
1779         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1780         struct xdr_stream xdr;
1781         struct compound_hdr hdr = {
1782                 .nops = 0,
1783         };
1784         int replen;
1785
1786         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1787         encode_compound_hdr(&xdr, req, &hdr);
1788         encode_putfh(&xdr, args->fh, &hdr);
1789         encode_read(&xdr, args, &hdr);
1790
1791         /* set up reply kvec
1792          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1793          *       + OP_READ + status + eof + datalen = 9
1794          */
1795         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1796         xdr_inline_pages(&req->rq_rcv_buf, replen,
1797                          args->pages, args->pgbase, args->count);
1798         req->rq_rcv_buf.flags |= XDRBUF_READ;
1799         encode_nops(&hdr);
1800         return 0;
1801 }
1802
1803 /*
1804  * Encode an SETATTR request
1805  */
1806 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1807 {
1808         struct xdr_stream xdr;
1809         struct compound_hdr hdr = {
1810                 .nops   = 0,
1811         };
1812
1813         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1814         encode_compound_hdr(&xdr, req, &hdr);
1815         encode_putfh(&xdr, args->fh, &hdr);
1816         encode_setattr(&xdr, args, args->server, &hdr);
1817         encode_getfattr(&xdr, args->bitmask, &hdr);
1818         encode_nops(&hdr);
1819         return 0;
1820 }
1821
1822 /*
1823  * Encode a GETACL request
1824  */
1825 static int
1826 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1827                 struct nfs_getaclargs *args)
1828 {
1829         struct xdr_stream xdr;
1830         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1831         struct compound_hdr hdr = {
1832                 .nops   = 0,
1833         };
1834         int replen;
1835
1836         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1837         encode_compound_hdr(&xdr, req, &hdr);
1838         encode_putfh(&xdr, args->fh, &hdr);
1839         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1840
1841         /* set up reply buffer: */
1842         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1843         xdr_inline_pages(&req->rq_rcv_buf, replen,
1844                 args->acl_pages, args->acl_pgbase, args->acl_len);
1845         encode_nops(&hdr);
1846         return 0;
1847 }
1848
1849 /*
1850  * Encode a WRITE request
1851  */
1852 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1853 {
1854         struct xdr_stream xdr;
1855         struct compound_hdr hdr = {
1856                 .nops = 0,
1857         };
1858
1859         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1860         encode_compound_hdr(&xdr, req, &hdr);
1861         encode_putfh(&xdr, args->fh, &hdr);
1862         encode_write(&xdr, args, &hdr);
1863         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1864         encode_getfattr(&xdr, args->bitmask, &hdr);
1865         encode_nops(&hdr);
1866         return 0;
1867 }
1868
1869 /*
1870  *  a COMMIT request
1871  */
1872 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1873 {
1874         struct xdr_stream xdr;
1875         struct compound_hdr hdr = {
1876                 .nops = 0,
1877         };
1878
1879         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1880         encode_compound_hdr(&xdr, req, &hdr);
1881         encode_putfh(&xdr, args->fh, &hdr);
1882         encode_commit(&xdr, args, &hdr);
1883         encode_getfattr(&xdr, args->bitmask, &hdr);
1884         encode_nops(&hdr);
1885         return 0;
1886 }
1887
1888 /*
1889  * FSINFO request
1890  */
1891 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1892 {
1893         struct xdr_stream xdr;
1894         struct compound_hdr hdr = {
1895                 .nops   = 0,
1896         };
1897
1898         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1899         encode_compound_hdr(&xdr, req, &hdr);
1900         encode_putfh(&xdr, args->fh, &hdr);
1901         encode_fsinfo(&xdr, args->bitmask, &hdr);
1902         encode_nops(&hdr);
1903         return 0;
1904 }
1905
1906 /*
1907  * a PATHCONF request
1908  */
1909 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1910 {
1911         struct xdr_stream xdr;
1912         struct compound_hdr hdr = {
1913                 .nops = 0,
1914         };
1915
1916         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1917         encode_compound_hdr(&xdr, req, &hdr);
1918         encode_putfh(&xdr, args->fh, &hdr);
1919         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1920                            &hdr);
1921         encode_nops(&hdr);
1922         return 0;
1923 }
1924
1925 /*
1926  * a STATFS request
1927  */
1928 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1929 {
1930         struct xdr_stream xdr;
1931         struct compound_hdr hdr = {
1932                 .nops = 0,
1933         };
1934
1935         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1936         encode_compound_hdr(&xdr, req, &hdr);
1937         encode_putfh(&xdr, args->fh, &hdr);
1938         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1939                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1940         encode_nops(&hdr);
1941         return 0;
1942 }
1943
1944 /*
1945  * GETATTR_BITMAP request
1946  */
1947 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
1948                                     struct nfs4_server_caps_arg *args)
1949 {
1950         struct xdr_stream xdr;
1951         struct compound_hdr hdr = {
1952                 .nops = 0,
1953         };
1954
1955         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1956         encode_compound_hdr(&xdr, req, &hdr);
1957         encode_putfh(&xdr, args->fhandle, &hdr);
1958         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1959                            FATTR4_WORD0_LINK_SUPPORT|
1960                            FATTR4_WORD0_SYMLINK_SUPPORT|
1961                            FATTR4_WORD0_ACLSUPPORT, &hdr);
1962         encode_nops(&hdr);
1963         return 0;
1964 }
1965
1966 /*
1967  * a RENEW request
1968  */
1969 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1970 {
1971         struct xdr_stream xdr;
1972         struct compound_hdr hdr = {
1973                 .nops   = 0,
1974         };
1975
1976         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1977         encode_compound_hdr(&xdr, req, &hdr);
1978         encode_renew(&xdr, clp, &hdr);
1979         encode_nops(&hdr);
1980         return 0;
1981 }
1982
1983 /*
1984  * a SETCLIENTID request
1985  */
1986 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1987 {
1988         struct xdr_stream xdr;
1989         struct compound_hdr hdr = {
1990                 .nops   = 0,
1991         };
1992
1993         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1994         encode_compound_hdr(&xdr, req, &hdr);
1995         encode_setclientid(&xdr, sc, &hdr);
1996         encode_nops(&hdr);
1997         return 0;
1998 }
1999
2000 /*
2001  * a SETCLIENTID_CONFIRM request
2002  */
2003 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2004 {
2005         struct xdr_stream xdr;
2006         struct compound_hdr hdr = {
2007                 .nops   = 0,
2008         };
2009         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2010
2011         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2012         encode_compound_hdr(&xdr, req, &hdr);
2013         encode_setclientid_confirm(&xdr, clp, &hdr);
2014         encode_putrootfh(&xdr, &hdr);
2015         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2016         encode_nops(&hdr);
2017         return 0;
2018 }
2019
2020 /*
2021  * DELEGRETURN request
2022  */
2023 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2024 {
2025         struct xdr_stream xdr;
2026         struct compound_hdr hdr = {
2027                 .nops = 0,
2028         };
2029
2030         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2031         encode_compound_hdr(&xdr, req, &hdr);
2032         encode_putfh(&xdr, args->fhandle, &hdr);
2033         encode_delegreturn(&xdr, args->stateid, &hdr);
2034         encode_getfattr(&xdr, args->bitmask, &hdr);
2035         encode_nops(&hdr);
2036         return 0;
2037 }
2038
2039 /*
2040  * Encode FS_LOCATIONS request
2041  */
2042 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2043 {
2044         struct xdr_stream xdr;
2045         struct compound_hdr hdr = {
2046                 .nops = 0,
2047         };
2048         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2049         int replen;
2050
2051         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2052         encode_compound_hdr(&xdr, req, &hdr);
2053         encode_putfh(&xdr, args->dir_fh, &hdr);
2054         encode_lookup(&xdr, args->name, &hdr);
2055         encode_fs_locations(&xdr, args->bitmask, &hdr);
2056
2057         /* set up reply
2058          *   toplevel_status + OP_PUTFH + status
2059          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2060          */
2061         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2062         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2063                         0, PAGE_SIZE);
2064         encode_nops(&hdr);
2065         return 0;
2066 }
2067
2068 /*
2069  * START OF "GENERIC" DECODE ROUTINES.
2070  *   These may look a little ugly since they are imported from a "generic"
2071  * set of XDR encode/decode routines which are intended to be shared by
2072  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2073  *
2074  * If the pain of reading these is too great, it should be a straightforward
2075  * task to translate them into Linux-specific versions which are more
2076  * consistent with the style used in NFSv2/v3...
2077  */
2078 #define READ32(x)         (x) = ntohl(*p++)
2079 #define READ64(x)         do {                  \
2080         (x) = (u64)ntohl(*p++) << 32;           \
2081         (x) |= ntohl(*p++);                     \
2082 } while (0)
2083 #define READTIME(x)       do {                  \
2084         p++;                                    \
2085         (x.tv_sec) = ntohl(*p++);               \
2086         (x.tv_nsec) = ntohl(*p++);              \
2087 } while (0)
2088 #define COPYMEM(x,nbytes) do {                  \
2089         memcpy((x), p, nbytes);                 \
2090         p += XDR_QUADLEN(nbytes);               \
2091 } while (0)
2092
2093 #define READ_BUF(nbytes)  do { \
2094         p = xdr_inline_decode(xdr, nbytes); \
2095         if (unlikely(!p)) { \
2096                 dprintk("nfs: %s: prematurely hit end of receive" \
2097                                 " buffer\n", __func__); \
2098                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2099                                 __func__, xdr->p, nbytes, xdr->end); \
2100                 return -EIO; \
2101         } \
2102 } while (0)
2103
2104 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2105 {
2106         __be32 *p;
2107
2108         READ_BUF(4);
2109         READ32(*len);
2110         READ_BUF(*len);
2111         *string = (char *)p;
2112         return 0;
2113 }
2114
2115 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2116 {
2117         __be32 *p;
2118
2119         READ_BUF(8);
2120         READ32(hdr->status);
2121         READ32(hdr->taglen);
2122
2123         READ_BUF(hdr->taglen + 4);
2124         hdr->tag = (char *)p;
2125         p += XDR_QUADLEN(hdr->taglen);
2126         READ32(hdr->nops);
2127         if (unlikely(hdr->nops < 1))
2128                 return nfs4_stat_to_errno(hdr->status);
2129         return 0;
2130 }
2131
2132 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2133 {
2134         __be32 *p;
2135         uint32_t opnum;
2136         int32_t nfserr;
2137
2138         READ_BUF(8);
2139         READ32(opnum);
2140         if (opnum != expected) {
2141                 dprintk("nfs: Server returned operation"
2142                         " %d but we issued a request for %d\n",
2143                                 opnum, expected);
2144                 return -EIO;
2145         }
2146         READ32(nfserr);
2147         if (nfserr != NFS_OK)
2148                 return nfs4_stat_to_errno(nfserr);
2149         return 0;
2150 }
2151
2152 /* Dummy routine */
2153 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2154 {
2155         __be32 *p;
2156         unsigned int strlen;
2157         char *str;
2158
2159         READ_BUF(12);
2160         return decode_opaque_inline(xdr, &strlen, &str);
2161 }
2162
2163 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2164 {
2165         uint32_t bmlen;
2166         __be32 *p;
2167
2168         READ_BUF(4);
2169         READ32(bmlen);
2170
2171         bitmap[0] = bitmap[1] = 0;
2172         READ_BUF((bmlen << 2));
2173         if (bmlen > 0) {
2174                 READ32(bitmap[0]);
2175                 if (bmlen > 1)
2176                         READ32(bitmap[1]);
2177         }
2178         return 0;
2179 }
2180
2181 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2182 {
2183         __be32 *p;
2184
2185         READ_BUF(4);
2186         READ32(*attrlen);
2187         *savep = xdr->p;
2188         return 0;
2189 }
2190
2191 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2192 {
2193         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2194                 decode_attr_bitmap(xdr, bitmask);
2195                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2196         } else
2197                 bitmask[0] = bitmask[1] = 0;
2198         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2199         return 0;
2200 }
2201
2202 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2203 {
2204         __be32 *p;
2205         int ret = 0;
2206
2207         *type = 0;
2208         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2209                 return -EIO;
2210         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2211                 READ_BUF(4);
2212                 READ32(*type);
2213                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2214                         dprintk("%s: bad type %d\n", __func__, *type);
2215                         return -EIO;
2216                 }
2217                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2218                 ret = NFS_ATTR_FATTR_TYPE;
2219         }
2220         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2221         return ret;
2222 }
2223
2224 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2225 {
2226         __be32 *p;
2227         int ret = 0;
2228
2229         *change = 0;
2230         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2231                 return -EIO;
2232         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2233                 READ_BUF(8);
2234                 READ64(*change);
2235                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2236                 ret = NFS_ATTR_FATTR_CHANGE;
2237         }
2238         dprintk("%s: change attribute=%Lu\n", __func__,
2239                         (unsigned long long)*change);
2240         return ret;
2241 }
2242
2243 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2244 {
2245         __be32 *p;
2246         int ret = 0;
2247
2248         *size = 0;
2249         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2250                 return -EIO;
2251         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2252                 READ_BUF(8);
2253                 READ64(*size);
2254                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2255                 ret = NFS_ATTR_FATTR_SIZE;
2256         }
2257         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2258         return ret;
2259 }
2260
2261 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2262 {
2263         __be32 *p;
2264
2265         *res = 0;
2266         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2267                 return -EIO;
2268         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2269                 READ_BUF(4);
2270                 READ32(*res);
2271                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2272         }
2273         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2274         return 0;
2275 }
2276
2277 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2278 {
2279         __be32 *p;
2280
2281         *res = 0;
2282         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2283                 return -EIO;
2284         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2285                 READ_BUF(4);
2286                 READ32(*res);
2287                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2288         }
2289         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2290         return 0;
2291 }
2292
2293 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2294 {
2295         __be32 *p;
2296         int ret = 0;
2297
2298         fsid->major = 0;
2299         fsid->minor = 0;
2300         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2301                 return -EIO;
2302         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2303                 READ_BUF(16);
2304                 READ64(fsid->major);
2305                 READ64(fsid->minor);
2306                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2307                 ret = NFS_ATTR_FATTR_FSID;
2308         }
2309         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2310                         (unsigned long long)fsid->major,
2311                         (unsigned long long)fsid->minor);
2312         return ret;
2313 }
2314
2315 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2316 {
2317         __be32 *p;
2318
2319         *res = 60;
2320         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2321                 return -EIO;
2322         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2323                 READ_BUF(4);
2324                 READ32(*res);
2325                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2326         }
2327         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2328         return 0;
2329 }
2330
2331 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2332 {
2333         __be32 *p;
2334
2335         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2336         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2337                 return -EIO;
2338         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2339                 READ_BUF(4);
2340                 READ32(*res);
2341                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2342         }
2343         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2344         return 0;
2345 }
2346
2347 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2348 {
2349         __be32 *p;
2350         int ret = 0;
2351
2352         *fileid = 0;
2353         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2354                 return -EIO;
2355         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2356                 READ_BUF(8);
2357                 READ64(*fileid);
2358                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2359                 ret = NFS_ATTR_FATTR_FILEID;
2360         }
2361         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2362         return ret;
2363 }
2364
2365 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2366 {
2367         __be32 *p;
2368         int ret = 0;
2369
2370         *fileid = 0;
2371         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2372                 return -EIO;
2373         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2374                 READ_BUF(8);
2375                 READ64(*fileid);
2376                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2377                 ret = NFS_ATTR_FATTR_FILEID;
2378         }
2379         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2380         return ret;
2381 }
2382
2383 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2384 {
2385         __be32 *p;
2386         int status = 0;
2387
2388         *res = 0;
2389         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2390                 return -EIO;
2391         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2392                 READ_BUF(8);
2393                 READ64(*res);
2394                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2395         }
2396         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2397         return status;
2398 }
2399
2400 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2401 {
2402         __be32 *p;
2403         int status = 0;
2404
2405         *res = 0;
2406         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2407                 return -EIO;
2408         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2409                 READ_BUF(8);
2410                 READ64(*res);
2411                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2412         }
2413         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2414         return status;
2415 }
2416
2417 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2418 {
2419         __be32 *p;
2420         int status = 0;
2421
2422         *res = 0;
2423         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2424                 return -EIO;
2425         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2426                 READ_BUF(8);
2427                 READ64(*res);
2428                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2429         }
2430         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2431         return status;
2432 }
2433
2434 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2435 {
2436         u32 n;
2437         __be32 *p;
2438         int status = 0;
2439
2440         READ_BUF(4);
2441         READ32(n);
2442         if (n == 0)
2443                 goto root_path;
2444         dprintk("path ");
2445         path->ncomponents = 0;
2446         while (path->ncomponents < n) {
2447                 struct nfs4_string *component = &path->components[path->ncomponents];
2448                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2449                 if (unlikely(status != 0))
2450                         goto out_eio;
2451                 if (path->ncomponents != n)
2452                         dprintk("/");
2453                 dprintk("%s", component->data);
2454                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2455                         path->ncomponents++;
2456                 else {
2457                         dprintk("cannot parse %d components in path\n", n);
2458                         goto out_eio;
2459                 }
2460         }
2461 out:
2462         dprintk("\n");
2463         return status;
2464 root_path:
2465 /* a root pathname is sent as a zero component4 */
2466         path->ncomponents = 1;
2467         path->components[0].len=0;
2468         path->components[0].data=NULL;
2469         dprintk("path /\n");
2470         goto out;
2471 out_eio:
2472         dprintk(" status %d", status);
2473         status = -EIO;
2474         goto out;
2475 }
2476
2477 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2478 {
2479         int n;
2480         __be32 *p;
2481         int status = -EIO;
2482
2483         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2484                 goto out;
2485         status = 0;
2486         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2487                 goto out;
2488         dprintk("%s: fsroot ", __func__);
2489         status = decode_pathname(xdr, &res->fs_path);
2490         if (unlikely(status != 0))
2491                 goto out;
2492         READ_BUF(4);
2493         READ32(n);
2494         if (n <= 0)
2495                 goto out_eio;
2496         res->nlocations = 0;
2497         while (res->nlocations < n) {
2498                 u32 m;
2499                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2500
2501                 READ_BUF(4);
2502                 READ32(m);
2503
2504                 loc->nservers = 0;
2505                 dprintk("%s: servers ", __func__);
2506                 while (loc->nservers < m) {
2507                         struct nfs4_string *server = &loc->servers[loc->nservers];
2508                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2509                         if (unlikely(status != 0))
2510                                 goto out_eio;
2511                         dprintk("%s ", server->data);
2512                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2513                                 loc->nservers++;
2514                         else {
2515                                 unsigned int i;
2516                                 dprintk("%s: using first %u of %u servers "
2517                                         "returned for location %u\n",
2518                                                 __func__,
2519                                                 NFS4_FS_LOCATION_MAXSERVERS,
2520                                                 m, res->nlocations);
2521                                 for (i = loc->nservers; i < m; i++) {
2522                                         unsigned int len;
2523                                         char *data;
2524                                         status = decode_opaque_inline(xdr, &len, &data);
2525                                         if (unlikely(status != 0))
2526                                                 goto out_eio;
2527                                 }
2528                         }
2529                 }
2530                 status = decode_pathname(xdr, &loc->rootpath);
2531                 if (unlikely(status != 0))
2532                         goto out_eio;
2533                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2534                         res->nlocations++;
2535         }
2536         if (res->nlocations != 0)
2537                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2538 out:
2539         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2540         return status;
2541 out_eio:
2542         status = -EIO;
2543         goto out;
2544 }
2545
2546 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2547 {
2548         __be32 *p;
2549         int status = 0;
2550
2551         *res = 0;
2552         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2553                 return -EIO;
2554         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2555                 READ_BUF(8);
2556                 READ64(*res);
2557                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2558         }
2559         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2560         return status;
2561 }
2562
2563 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2564 {
2565         __be32 *p;
2566         int status = 0;
2567
2568         *maxlink = 1;
2569         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2570                 return -EIO;
2571         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2572                 READ_BUF(4);
2573                 READ32(*maxlink);
2574                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2575         }
2576         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2577         return status;
2578 }
2579
2580 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2581 {
2582         __be32 *p;
2583         int status = 0;
2584
2585         *maxname = 1024;
2586         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2587                 return -EIO;
2588         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2589                 READ_BUF(4);
2590                 READ32(*maxname);
2591                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2592         }
2593         dprintk("%s: maxname=%u\n", __func__, *maxname);
2594         return status;
2595 }
2596
2597 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2598 {
2599         __be32 *p;
2600         int status = 0;
2601
2602         *res = 1024;
2603         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2604                 return -EIO;
2605         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2606                 uint64_t maxread;
2607                 READ_BUF(8);
2608                 READ64(maxread);
2609                 if (maxread > 0x7FFFFFFF)
2610                         maxread = 0x7FFFFFFF;
2611                 *res = (uint32_t)maxread;
2612                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2613         }
2614         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2615         return status;
2616 }
2617
2618 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2619 {
2620         __be32 *p;
2621         int status = 0;
2622
2623         *res = 1024;
2624         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2625                 return -EIO;
2626         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2627                 uint64_t maxwrite;
2628                 READ_BUF(8);
2629                 READ64(maxwrite);
2630                 if (maxwrite > 0x7FFFFFFF)
2631                         maxwrite = 0x7FFFFFFF;
2632                 *res = (uint32_t)maxwrite;
2633                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2634         }
2635         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2636         return status;
2637 }
2638
2639 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2640 {
2641         uint32_t tmp;
2642         __be32 *p;
2643         int ret = 0;
2644
2645         *mode = 0;
2646         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2647                 return -EIO;
2648         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2649                 READ_BUF(4);
2650                 READ32(tmp);
2651                 *mode = tmp & ~S_IFMT;
2652                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2653                 ret = NFS_ATTR_FATTR_MODE;
2654         }
2655         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2656         return ret;
2657 }
2658
2659 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2660 {
2661         __be32 *p;
2662         int ret = 0;
2663
2664         *nlink = 1;
2665         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2666                 return -EIO;
2667         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2668                 READ_BUF(4);
2669                 READ32(*nlink);
2670                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2671                 ret = NFS_ATTR_FATTR_NLINK;
2672         }
2673         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2674         return ret;
2675 }
2676
2677 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2678 {
2679         uint32_t len;
2680         __be32 *p;
2681         int ret = 0;
2682
2683         *uid = -2;
2684         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2685                 return -EIO;
2686         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2687                 READ_BUF(4);
2688                 READ32(len);
2689                 READ_BUF(len);
2690                 if (len < XDR_MAX_NETOBJ) {
2691                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2692                                 ret = NFS_ATTR_FATTR_OWNER;
2693                         else
2694                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2695                                                 __func__);
2696                 } else
2697                         dprintk("%s: name too long (%u)!\n",
2698                                         __func__, len);
2699                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2700         }
2701         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2702         return ret;
2703 }
2704
2705 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2706 {
2707         uint32_t len;
2708         __be32 *p;
2709         int ret = 0;
2710
2711         *gid = -2;
2712         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2713                 return -EIO;
2714         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2715                 READ_BUF(4);
2716                 READ32(len);
2717                 READ_BUF(len);
2718                 if (len < XDR_MAX_NETOBJ) {
2719                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2720                                 ret = NFS_ATTR_FATTR_GROUP;
2721                         else
2722                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2723                                                 __func__);
2724                 } else
2725                         dprintk("%s: name too long (%u)!\n",
2726                                         __func__, len);
2727                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2728         }
2729         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2730         return ret;
2731 }
2732
2733 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2734 {
2735         uint32_t major = 0, minor = 0;
2736         __be32 *p;
2737         int ret = 0;
2738
2739         *rdev = MKDEV(0,0);
2740         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2741                 return -EIO;
2742         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2743                 dev_t tmp;
2744
2745                 READ_BUF(8);
2746                 READ32(major);
2747                 READ32(minor);
2748                 tmp = MKDEV(major, minor);
2749                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2750                         *rdev = tmp;
2751                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2752                 ret = NFS_ATTR_FATTR_RDEV;
2753         }
2754         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2755         return ret;
2756 }
2757
2758 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2759 {
2760         __be32 *p;
2761         int status = 0;
2762
2763         *res = 0;
2764         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2765                 return -EIO;
2766         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2767                 READ_BUF(8);
2768                 READ64(*res);
2769                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2770         }
2771         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2772         return status;
2773 }
2774
2775 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2776 {
2777         __be32 *p;
2778         int status = 0;
2779
2780         *res = 0;
2781         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2782                 return -EIO;
2783         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2784                 READ_BUF(8);
2785                 READ64(*res);
2786                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2787         }
2788         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2789         return status;
2790 }
2791
2792 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2793 {
2794         __be32 *p;
2795         int status = 0;
2796
2797         *res = 0;
2798         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2799                 return -EIO;
2800         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2801                 READ_BUF(8);
2802                 READ64(*res);
2803                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2804         }
2805         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2806         return status;
2807 }
2808
2809 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2810 {
2811         __be32 *p;
2812         int ret = 0;
2813
2814         *used = 0;
2815         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2816                 return -EIO;
2817         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2818                 READ_BUF(8);
2819                 READ64(*used);
2820                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2821                 ret = NFS_ATTR_FATTR_SPACE_USED;
2822         }
2823         dprintk("%s: space used=%Lu\n", __func__,
2824                         (unsigned long long)*used);
2825         return ret;
2826 }
2827
2828 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2829 {
2830         __be32 *p;
2831         uint64_t sec;
2832         uint32_t nsec;
2833
2834         READ_BUF(12);
2835         READ64(sec);
2836         READ32(nsec);
2837         time->tv_sec = (time_t)sec;
2838         time->tv_nsec = (long)nsec;
2839         return 0;
2840 }
2841
2842 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2843 {
2844         int status = 0;
2845
2846         time->tv_sec = 0;
2847         time->tv_nsec = 0;
2848         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2849                 return -EIO;
2850         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2851                 status = decode_attr_time(xdr, time);
2852                 if (status == 0)
2853                         status = NFS_ATTR_FATTR_ATIME;
2854                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2855         }
2856         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2857         return status;
2858 }
2859
2860 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2861 {
2862         int status = 0;
2863
2864         time->tv_sec = 0;
2865         time->tv_nsec = 0;
2866         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2867                 return -EIO;
2868         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2869                 status = decode_attr_time(xdr, time);
2870                 if (status == 0)
2871                         status = NFS_ATTR_FATTR_CTIME;
2872                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2873         }
2874         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2875         return status;
2876 }
2877
2878 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2879 {
2880         int status = 0;
2881
2882         time->tv_sec = 0;
2883         time->tv_nsec = 0;
2884         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2885                 return -EIO;
2886         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2887                 status = decode_attr_time(xdr, time);
2888                 if (status == 0)
2889                         status = NFS_ATTR_FATTR_MTIME;
2890                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2891         }
2892         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2893         return status;
2894 }
2895
2896 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2897 {
2898         unsigned int attrwords = XDR_QUADLEN(attrlen);
2899         unsigned int nwords = xdr->p - savep;
2900
2901         if (unlikely(attrwords != nwords)) {
2902                 dprintk("%s: server returned incorrect attribute length: "
2903                         "%u %c %u\n",
2904                                 __func__,
2905                                 attrwords << 2,
2906                                 (attrwords < nwords) ? '<' : '>',
2907                                 nwords << 2);
2908                 return -EIO;
2909         }
2910         return 0;
2911 }
2912
2913 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2914 {
2915         __be32 *p;
2916
2917         READ_BUF(20);
2918         READ32(cinfo->atomic);
2919         READ64(cinfo->before);
2920         READ64(cinfo->after);
2921         return 0;
2922 }
2923
2924 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2925 {
2926         __be32 *p;
2927         uint32_t supp, acc;
2928         int status;
2929
2930         status = decode_op_hdr(xdr, OP_ACCESS);
2931         if (status)
2932                 return status;
2933         READ_BUF(8);
2934         READ32(supp);
2935         READ32(acc);
2936         access->supported = supp;
2937         access->access = acc;
2938         return 0;
2939 }
2940
2941 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2942 {
2943         __be32 *p;
2944         int status;
2945
2946         status = decode_op_hdr(xdr, OP_CLOSE);
2947         if (status != -EIO)
2948                 nfs_increment_open_seqid(status, res->seqid);
2949         if (status)
2950                 return status;
2951         READ_BUF(NFS4_STATEID_SIZE);
2952         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2953         return 0;
2954 }
2955
2956 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2957 {
2958         __be32 *p;
2959         int status;
2960
2961         status = decode_op_hdr(xdr, OP_COMMIT);
2962         if (status)
2963                 return status;
2964         READ_BUF(8);
2965         COPYMEM(res->verf->verifier, 8);
2966         return 0;
2967 }
2968
2969 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2970 {
2971         __be32 *p;
2972         uint32_t bmlen;
2973         int status;
2974
2975         status = decode_op_hdr(xdr, OP_CREATE);
2976         if (status)
2977                 return status;
2978         if ((status = decode_change_info(xdr, cinfo)))
2979                 return status;
2980         READ_BUF(4);
2981         READ32(bmlen);
2982         READ_BUF(bmlen << 2);
2983         return 0;
2984 }
2985
2986 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2987 {
2988         __be32 *savep;
2989         uint32_t attrlen, bitmap[2] = {0};
2990         int status;
2991
2992         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2993                 goto xdr_error;
2994         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2995                 goto xdr_error;
2996         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2997                 goto xdr_error;
2998         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2999                 goto xdr_error;
3000         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3001                 goto xdr_error;
3002         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3003                 goto xdr_error;
3004         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3005                 goto xdr_error;
3006         status = verify_attr_len(xdr, savep, attrlen);
3007 xdr_error:
3008         dprintk("%s: xdr returned %d!\n", __func__, -status);
3009         return status;
3010 }
3011
3012 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3013 {
3014         __be32 *savep;
3015         uint32_t attrlen, bitmap[2] = {0};
3016         int status;
3017
3018         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3019                 goto xdr_error;
3020         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3021                 goto xdr_error;
3022         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3023                 goto xdr_error;
3024
3025         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3026                 goto xdr_error;
3027         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3028                 goto xdr_error;
3029         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3030                 goto xdr_error;
3031         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3032                 goto xdr_error;
3033         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3034                 goto xdr_error;
3035         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3036                 goto xdr_error;
3037
3038         status = verify_attr_len(xdr, savep, attrlen);
3039 xdr_error:
3040         dprintk("%s: xdr returned %d!\n", __func__, -status);
3041         return status;
3042 }
3043
3044 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3045 {
3046         __be32 *savep;
3047         uint32_t attrlen, bitmap[2] = {0};
3048         int status;
3049
3050         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3051                 goto xdr_error;
3052         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3053                 goto xdr_error;
3054         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3055                 goto xdr_error;
3056
3057         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3058                 goto xdr_error;
3059         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3060                 goto xdr_error;
3061
3062         status = verify_attr_len(xdr, savep, attrlen);
3063 xdr_error:
3064         dprintk("%s: xdr returned %d!\n", __func__, -status);
3065         return status;
3066 }
3067
3068 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3069 {
3070         __be32 *savep;
3071         uint32_t attrlen,
3072                  bitmap[2] = {0},
3073                  type;
3074         int status;
3075         umode_t fmode = 0;
3076         uint64_t fileid;
3077
3078         status = decode_op_hdr(xdr, OP_GETATTR);
3079         if (status < 0)
3080                 goto xdr_error;
3081
3082         status = decode_attr_bitmap(xdr, bitmap);
3083         if (status < 0)
3084                 goto xdr_error;
3085
3086         status = decode_attr_length(xdr, &attrlen, &savep);
3087         if (status < 0)
3088                 goto xdr_error;
3089
3090
3091         status = decode_attr_type(xdr, bitmap, &type);
3092         if (status < 0)
3093                 goto xdr_error;
3094         fattr->mode = 0;
3095         if (status != 0) {
3096                 fattr->mode |= nfs_type2fmt[type];
3097                 fattr->valid |= status;
3098         }
3099
3100         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3101         if (status < 0)
3102                 goto xdr_error;
3103         fattr->valid |= status;
3104
3105         status = decode_attr_size(xdr, bitmap, &fattr->size);
3106         if (status < 0)
3107                 goto xdr_error;
3108         fattr->valid |= status;
3109
3110         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3111         if (status < 0)
3112                 goto xdr_error;
3113         fattr->valid |= status;
3114
3115         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3116         if (status < 0)
3117                 goto xdr_error;
3118         fattr->valid |= status;
3119
3120         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3121                                                 struct nfs4_fs_locations,
3122                                                 fattr));
3123         if (status < 0)
3124                 goto xdr_error;
3125         fattr->valid |= status;
3126
3127         status = decode_attr_mode(xdr, bitmap, &fmode);
3128         if (status < 0)
3129                 goto xdr_error;
3130         if (status != 0) {
3131                 fattr->mode |= fmode;
3132                 fattr->valid |= status;
3133         }
3134
3135         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3136         if (status < 0)
3137                 goto xdr_error;
3138         fattr->valid |= status;
3139
3140         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3141         if (status < 0)
3142                 goto xdr_error;
3143         fattr->valid |= status;
3144
3145         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3146         if (status < 0)
3147                 goto xdr_error;
3148         fattr->valid |= status;
3149
3150         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3151         if (status < 0)
3152                 goto xdr_error;
3153         fattr->valid |= status;
3154
3155         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3156         if (status < 0)
3157                 goto xdr_error;
3158         fattr->valid |= status;
3159
3160         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3161         if (status < 0)
3162                 goto xdr_error;
3163         fattr->valid |= status;
3164
3165         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3166         if (status < 0)
3167                 goto xdr_error;
3168         fattr->valid |= status;
3169
3170         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3171         if (status < 0)
3172                 goto xdr_error;
3173         fattr->valid |= status;
3174
3175         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3176         if (status < 0)
3177                 goto xdr_error;
3178         if (status != 0 && !(fattr->valid & status)) {
3179                 fattr->fileid = fileid;
3180                 fattr->valid |= status;
3181         }
3182
3183         status = verify_attr_len(xdr, savep, attrlen);
3184 xdr_error:
3185         dprintk("%s: xdr returned %d\n", __func__, -status);
3186         return status;
3187 }
3188
3189
3190 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3191 {
3192         __be32 *savep;
3193         uint32_t attrlen, bitmap[2];
3194         int status;
3195
3196         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3197                 goto xdr_error;
3198         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3199                 goto xdr_error;
3200         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3201                 goto xdr_error;
3202
3203         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3204
3205         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3206                 goto xdr_error;
3207         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3208                 goto xdr_error;
3209         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3210                 goto xdr_error;
3211         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3212         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3213                 goto xdr_error;
3214         fsinfo->wtpref = fsinfo->wtmax;
3215
3216         status = verify_attr_len(xdr, savep, attrlen);
3217 xdr_error:
3218         dprintk("%s: xdr returned %d!\n", __func__, -status);
3219         return status;
3220 }
3221
3222 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3223 {
3224         __be32 *p;
3225         uint32_t len;
3226         int status;
3227
3228         /* Zero handle first to allow comparisons */
3229         memset(fh, 0, sizeof(*fh));
3230
3231         status = decode_op_hdr(xdr, OP_GETFH);
3232         if (status)
3233                 return status;
3234
3235         READ_BUF(4);
3236         READ32(len);
3237         if (len > NFS4_FHSIZE)
3238                 return -EIO;
3239         fh->size = len;
3240         READ_BUF(len);
3241         COPYMEM(fh->data, len);
3242         return 0;
3243 }
3244
3245 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3246 {
3247         int status;
3248
3249         status = decode_op_hdr(xdr, OP_LINK);
3250         if (status)
3251                 return status;
3252         return decode_change_info(xdr, cinfo);
3253 }
3254
3255 /*
3256  * We create the owner, so we know a proper owner.id length is 4.
3257  */
3258 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3259 {
3260         uint64_t offset, length, clientid;
3261         __be32 *p;
3262         uint32_t namelen, type;
3263
3264         READ_BUF(32);
3265         READ64(offset);
3266         READ64(length);
3267         READ32(type);
3268         if (fl != NULL) {
3269                 fl->fl_start = (loff_t)offset;
3270                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3271                 if (length == ~(uint64_t)0)
3272                         fl->fl_end = OFFSET_MAX;
3273                 fl->fl_type = F_WRLCK;
3274                 if (type & 1)
3275                         fl->fl_type = F_RDLCK;
3276                 fl->fl_pid = 0;
3277         }
3278         READ64(clientid);
3279         READ32(namelen);
3280         READ_BUF(namelen);
3281         return -NFS4ERR_DENIED;
3282 }
3283
3284 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3285 {
3286         __be32 *p;
3287         int status;
3288
3289         status = decode_op_hdr(xdr, OP_LOCK);
3290         if (status == -EIO)
3291                 goto out;
3292         if (status == 0) {
3293                 READ_BUF(NFS4_STATEID_SIZE);
3294                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3295         } else if (status == -NFS4ERR_DENIED)
3296                 status = decode_lock_denied(xdr, NULL);
3297         if (res->open_seqid != NULL)
3298                 nfs_increment_open_seqid(status, res->open_seqid);
3299         nfs_increment_lock_seqid(status, res->lock_seqid);
3300 out:
3301         return status;
3302 }
3303
3304 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3305 {
3306         int status;
3307         status = decode_op_hdr(xdr, OP_LOCKT);
3308         if (status == -NFS4ERR_DENIED)
3309                 return decode_lock_denied(xdr, res->denied);
3310         return status;
3311 }
3312
3313 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3314 {
3315         __be32 *p;
3316         int status;
3317
3318         status = decode_op_hdr(xdr, OP_LOCKU);
3319         if (status != -EIO)
3320                 nfs_increment_lock_seqid(status, res->seqid);
3321         if (status == 0) {
3322                 READ_BUF(NFS4_STATEID_SIZE);
3323                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3324         }
3325         return status;
3326 }
3327
3328 static int decode_lookup(struct xdr_stream *xdr)
3329 {
3330         return decode_op_hdr(xdr, OP_LOOKUP);
3331 }
3332
3333 /* This is too sick! */
3334 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3335 {
3336         __be32 *p;
3337         uint32_t limit_type, nblocks, blocksize;
3338
3339         READ_BUF(12);
3340         READ32(limit_type);
3341         switch (limit_type) {
3342         case 1:
3343                 READ64(*maxsize);
3344                 break;
3345         case 2:
3346                 READ32(nblocks);
3347                 READ32(blocksize);
3348                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3349         }
3350         return 0;
3351 }
3352
3353 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3354 {
3355         __be32 *p;
3356         uint32_t delegation_type;
3357
3358         READ_BUF(4);
3359         READ32(delegation_type);
3360         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3361                 res->delegation_type = 0;
3362                 return 0;
3363         }
3364         READ_BUF(NFS4_STATEID_SIZE+4);
3365         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3366         READ32(res->do_recall);
3367
3368         switch (delegation_type) {
3369         case NFS4_OPEN_DELEGATE_READ:
3370                 res->delegation_type = FMODE_READ;
3371                 break;
3372         case NFS4_OPEN_DELEGATE_WRITE:
3373                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3374                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3375                                 return -EIO;
3376         }
3377         return decode_ace(xdr, NULL, res->server->nfs_client);
3378 }
3379
3380 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3381 {
3382         __be32 *p;
3383         uint32_t savewords, bmlen, i;
3384         int status;
3385
3386         status = decode_op_hdr(xdr, OP_OPEN);
3387         if (status != -EIO)
3388                 nfs_increment_open_seqid(status, res->seqid);
3389         if (status)
3390                 return status;
3391         READ_BUF(NFS4_STATEID_SIZE);
3392         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3393
3394         decode_change_info(xdr, &res->cinfo);
3395
3396         READ_BUF(8);
3397         READ32(res->rflags);
3398         READ32(bmlen);
3399         if (bmlen > 10)
3400                 goto xdr_error;
3401
3402         READ_BUF(bmlen << 2);
3403         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3404         for (i = 0; i < savewords; ++i)
3405                 READ32(res->attrset[i]);
3406         for (; i < NFS4_BITMAP_SIZE; i++)
3407                 res->attrset[i] = 0;
3408
3409         return decode_delegation(xdr, res);
3410 xdr_error:
3411         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3412         return -EIO;
3413 }
3414
3415 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3416 {
3417         __be32 *p;
3418         int status;
3419
3420         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3421         if (status != -EIO)
3422                 nfs_increment_open_seqid(status, res->seqid);
3423         if (status)
3424                 return status;
3425         READ_BUF(NFS4_STATEID_SIZE);
3426         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3427         return 0;
3428 }
3429
3430 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3431 {
3432         __be32 *p;
3433         int status;
3434
3435         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3436         if (status != -EIO)
3437                 nfs_increment_open_seqid(status, res->seqid);
3438         if (status)
3439                 return status;
3440         READ_BUF(NFS4_STATEID_SIZE);
3441         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3442         return 0;
3443 }
3444
3445 static int decode_putfh(struct xdr_stream *xdr)
3446 {
3447         return decode_op_hdr(xdr, OP_PUTFH);
3448 }
3449
3450 static int decode_putrootfh(struct xdr_stream *xdr)
3451 {
3452         return decode_op_hdr(xdr, OP_PUTROOTFH);
3453 }
3454
3455 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3456 {
3457         struct kvec *iov = req->rq_rcv_buf.head;
3458         __be32 *p;
3459         uint32_t count, eof, recvd, hdrlen;
3460         int status;
3461
3462         status = decode_op_hdr(xdr, OP_READ);
3463         if (status)
3464                 return status;
3465         READ_BUF(8);
3466         READ32(eof);
3467         READ32(count);
3468         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3469         recvd = req->rq_rcv_buf.len - hdrlen;
3470         if (count > recvd) {
3471                 dprintk("NFS: server cheating in read reply: "
3472                                 "count %u > recvd %u\n", count, recvd);
3473                 count = recvd;
3474                 eof = 0;
3475         }
3476         xdr_read_pages(xdr, count);
3477         res->eof = eof;
3478         res->count = count;
3479         return 0;
3480 }
3481
3482 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3483 {
3484         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3485         struct page     *page = *rcvbuf->pages;
3486         struct kvec     *iov = rcvbuf->head;
3487         size_t          hdrlen;
3488         u32             recvd, pglen = rcvbuf->page_len;
3489         __be32          *end, *entry, *p, *kaddr;
3490         unsigned int    nr = 0;
3491         int             status;
3492
3493         status = decode_op_hdr(xdr, OP_READDIR);
3494         if (status)
3495                 return status;
3496         READ_BUF(8);
3497         COPYMEM(readdir->verifier.data, 8);
3498         dprintk("%s: verifier = %08x:%08x\n",
3499                         __func__,
3500                         ((u32 *)readdir->verifier.data)[0],
3501                         ((u32 *)readdir->verifier.data)[1]);
3502
3503
3504         hdrlen = (char *) p - (char *) iov->iov_base;
3505         recvd = rcvbuf->len - hdrlen;
3506         if (pglen > recvd)
3507                 pglen = recvd;
3508         xdr_read_pages(xdr, pglen);
3509
3510         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3511         kaddr = p = kmap_atomic(page, KM_USER0);
3512         end = p + ((pglen + readdir->pgbase) >> 2);
3513         entry = p;
3514
3515         /* Make sure the packet actually has a value_follows and EOF entry */
3516         if ((entry + 1) > end)
3517                 goto short_pkt;
3518
3519         for (; *p++; nr++) {
3520                 u32 len, attrlen, xlen;
3521                 if (end - p < 3)
3522                         goto short_pkt;
3523                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3524                 p += 2;                 /* cookie */
3525                 len = ntohl(*p++);      /* filename length */
3526                 if (len > NFS4_MAXNAMLEN) {
3527                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3528                                         len);
3529                         goto err_unmap;
3530                 }
3531                 xlen = XDR_QUADLEN(len);
3532                 if (end - p < xlen + 1)
3533                         goto short_pkt;
3534                 dprintk("filename = %*s\n", len, (char *)p);
3535                 p += xlen;
3536                 len = ntohl(*p++);      /* bitmap length */
3537                 if (end - p < len + 1)
3538                         goto short_pkt;
3539                 p += len;
3540                 attrlen = XDR_QUADLEN(ntohl(*p++));
3541                 if (end - p < attrlen + 2)
3542                         goto short_pkt;
3543                 p += attrlen;           /* attributes */
3544                 entry = p;
3545         }
3546         /*
3547          * Apparently some server sends responses that are a valid size, but
3548          * contain no entries, and have value_follows==0 and EOF==0. For
3549          * those, just set the EOF marker.
3550          */
3551         if (!nr && entry[1] == 0) {
3552                 dprintk("NFS: readdir reply truncated!\n");
3553                 entry[1] = 1;
3554         }
3555 out:
3556         kunmap_atomic(kaddr, KM_USER0);
3557         return 0;
3558 short_pkt:
3559         /*
3560          * When we get a short packet there are 2 possibilities. We can
3561          * return an error, or fix up the response to look like a valid
3562          * response and return what we have so far. If there are no
3563          * entries and the packet was short, then return -EIO. If there
3564          * are valid entries in the response, return them and pretend that
3565          * the call was successful, but incomplete. The caller can retry the
3566          * readdir starting at the last cookie.
3567          */
3568         dprintk("%s: short packet at entry %d\n", __func__, nr);
3569         entry[0] = entry[1] = 0;
3570         if (nr)
3571                 goto out;
3572 err_unmap:
3573         kunmap_atomic(kaddr, KM_USER0);
3574         return -errno_NFSERR_IO;
3575 }
3576
3577 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3578 {
3579         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3580         struct kvec *iov = rcvbuf->head;
3581         size_t hdrlen;
3582         u32 len, recvd;
3583         __be32 *p;
3584         char *kaddr;
3585         int status;
3586
3587         status = decode_op_hdr(xdr, OP_READLINK);
3588         if (status)
3589                 return status;
3590
3591         /* Convert length of symlink */
3592         READ_BUF(4);
3593         READ32(len);
3594         if (len >= rcvbuf->page_len || len <= 0) {
3595                 dprintk("nfs: server returned giant symlink!\n");
3596                 return -ENAMETOOLONG;
3597         }
3598         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3599         recvd = req->rq_rcv_buf.len - hdrlen;
3600         if (recvd < len) {
3601                 dprintk("NFS: server cheating in readlink reply: "
3602                                 "count %u > recvd %u\n", len, recvd);
3603                 return -EIO;
3604         }
3605         xdr_read_pages(xdr, len);
3606         /*
3607          * The XDR encode routine has set things up so that
3608          * the link text will be copied directly into the
3609          * buffer.  We just have to do overflow-checking,
3610          * and and null-terminate the text (the VFS expects
3611          * null-termination).
3612          */
3613         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3614         kaddr[len+rcvbuf->page_base] = '\0';
3615         kunmap_atomic(kaddr, KM_USER0);
3616         return 0;
3617 }
3618
3619 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3620 {
3621         int status;
3622
3623         status = decode_op_hdr(xdr, OP_REMOVE);
3624         if (status)
3625                 goto out;
3626         status = decode_change_info(xdr, cinfo);
3627 out:
3628         return status;
3629 }
3630
3631 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3632               struct nfs4_change_info *new_cinfo)
3633 {
3634         int status;
3635
3636         status = decode_op_hdr(xdr, OP_RENAME);
3637         if (status)
3638                 goto out;
3639         if ((status = decode_change_info(xdr, old_cinfo)))
3640                 goto out;
3641         status = decode_change_info(xdr, new_cinfo);
3642 out:
3643         return status;
3644 }
3645
3646 static int decode_renew(struct xdr_stream *xdr)
3647 {
3648         return decode_op_hdr(xdr, OP_RENEW);
3649 }
3650
3651 static int
3652 decode_restorefh(struct xdr_stream *xdr)
3653 {
3654         return decode_op_hdr(xdr, OP_RESTOREFH);
3655 }
3656
3657 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3658                 size_t *acl_len)
3659 {
3660         __be32 *savep;
3661         uint32_t attrlen,
3662                  bitmap[2] = {0};
3663         struct kvec *iov = req->rq_rcv_buf.head;
3664         int status;
3665
3666         *acl_len = 0;
3667         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3668                 goto out;
3669         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3670                 goto out;
3671         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3672                 goto out;
3673
3674         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3675                 return -EIO;
3676         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3677                 size_t hdrlen;
3678                 u32 recvd;
3679
3680                 /* We ignore &savep and don't do consistency checks on
3681                  * the attr length.  Let userspace figure it out.... */
3682                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3683                 recvd = req->rq_rcv_buf.len - hdrlen;
3684                 if (attrlen > recvd) {
3685                         dprintk("NFS: server cheating in getattr"
3686                                         " acl reply: attrlen %u > recvd %u\n",
3687                                         attrlen, recvd);
3688                         return -EINVAL;
3689                 }
3690                 xdr_read_pages(xdr, attrlen);
3691                 *acl_len = attrlen;
3692         } else
3693                 status = -EOPNOTSUPP;
3694
3695 out:
3696         return status;
3697 }
3698
3699 static int
3700 decode_savefh(struct xdr_stream *xdr)
3701 {
3702         return decode_op_hdr(xdr, OP_SAVEFH);
3703 }
3704
3705 static int decode_setattr(struct xdr_stream *xdr)
3706 {
3707         __be32 *p;
3708         uint32_t bmlen;
3709         int status;
3710
3711         status = decode_op_hdr(xdr, OP_SETATTR);
3712         if (status)
3713                 return status;
3714         READ_BUF(4);
3715         READ32(bmlen);
3716         READ_BUF(bmlen << 2);
3717         return 0;
3718 }
3719
3720 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3721 {
3722         __be32 *p;
3723         uint32_t opnum;
3724         int32_t nfserr;
3725
3726         READ_BUF(8);
3727         READ32(opnum);
3728         if (opnum != OP_SETCLIENTID) {
3729                 dprintk("nfs: decode_setclientid: Server returned operation"
3730                         " %d\n", opnum);
3731                 return -EIO;
3732         }
3733         READ32(nfserr);
3734         if (nfserr == NFS_OK) {
3735                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3736                 READ64(clp->cl_clientid);
3737                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3738         } else if (nfserr == NFSERR_CLID_INUSE) {
3739                 uint32_t len;
3740
3741                 /* skip netid string */
3742                 READ_BUF(4);
3743                 READ32(len);
3744                 READ_BUF(len);
3745
3746                 /* skip uaddr string */
3747                 READ_BUF(4);
3748                 READ32(len);
3749                 READ_BUF(len);
3750                 return -NFSERR_CLID_INUSE;
3751         } else
3752                 return nfs4_stat_to_errno(nfserr);
3753
3754         return 0;
3755 }
3756
3757 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3758 {
3759         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3760 }
3761
3762 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3763 {
3764         __be32 *p;
3765         int status;
3766
3767         status = decode_op_hdr(xdr, OP_WRITE);
3768         if (status)
3769                 return status;
3770
3771         READ_BUF(16);
3772         READ32(res->count);
3773         READ32(res->verf->committed);
3774         COPYMEM(res->verf->verifier, 8);
3775         return 0;
3776 }
3777
3778 static int decode_delegreturn(struct xdr_stream *xdr)
3779 {
3780         return decode_op_hdr(xdr, OP_DELEGRETURN);
3781 }
3782
3783 /*
3784  * END OF "GENERIC" DECODE ROUTINES.
3785  */
3786
3787 /*
3788  * Decode OPEN_DOWNGRADE response
3789  */
3790 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3791 {
3792         struct xdr_stream xdr;
3793         struct compound_hdr hdr;
3794         int status;
3795
3796         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3797         status = decode_compound_hdr(&xdr, &hdr);
3798         if (status)
3799                 goto out;
3800         status = decode_putfh(&xdr);
3801         if (status)
3802                 goto out;
3803         status = decode_open_downgrade(&xdr, res);
3804         if (status != 0)
3805                 goto out;
3806         decode_getfattr(&xdr, res->fattr, res->server);
3807 out:
3808         return status;
3809 }
3810
3811 /*
3812  * Decode ACCESS response
3813  */
3814 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3815 {
3816         struct xdr_stream xdr;
3817         struct compound_hdr hdr;
3818         int status;
3819
3820         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3821         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3822                 goto out;
3823         status = decode_putfh(&xdr);
3824         if (status != 0)
3825                 goto out;
3826         status = decode_access(&xdr, res);
3827         if (status != 0)
3828                 goto out;
3829         decode_getfattr(&xdr, res->fattr, res->server);
3830 out:
3831         return status;
3832 }
3833
3834 /*
3835  * Decode LOOKUP response
3836  */
3837 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3838 {
3839         struct xdr_stream xdr;
3840         struct compound_hdr hdr;
3841         int status;
3842
3843         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3844         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3845                 goto out;
3846         if ((status = decode_putfh(&xdr)) != 0)
3847                 goto out;
3848         if ((status = decode_lookup(&xdr)) != 0)
3849                 goto out;
3850         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3851                 goto out;
3852         status = decode_getfattr(&xdr, res->fattr, res->server);
3853 out:
3854         return status;
3855 }
3856
3857 /*
3858  * Decode LOOKUP_ROOT response
3859  */
3860 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3861 {
3862         struct xdr_stream xdr;
3863         struct compound_hdr hdr;
3864         int status;
3865
3866         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3867         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3868                 goto out;
3869         if ((status = decode_putrootfh(&xdr)) != 0)
3870                 goto out;
3871         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3872                 status = decode_getfattr(&xdr, res->fattr, res->server);
3873 out:
3874         return status;
3875 }
3876
3877 /*
3878  * Decode REMOVE response
3879  */
3880 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3881 {
3882         struct xdr_stream xdr;
3883         struct compound_hdr hdr;
3884         int status;
3885
3886         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3887         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3888                 goto out;
3889         if ((status = decode_putfh(&xdr)) != 0)
3890                 goto out;
3891         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3892                 goto out;
3893         decode_getfattr(&xdr, &res->dir_attr, res->server);
3894 out:
3895         return status;
3896 }
3897
3898 /*
3899  * Decode RENAME response
3900  */
3901 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3902 {
3903         struct xdr_stream xdr;
3904         struct compound_hdr hdr;
3905         int status;
3906
3907         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3908         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3909                 goto out;
3910         if ((status = decode_putfh(&xdr)) != 0)
3911                 goto out;
3912         if ((status = decode_savefh(&xdr)) != 0)
3913                 goto out;
3914         if ((status = decode_putfh(&xdr)) != 0)
3915                 goto out;
3916         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3917                 goto out;
3918         /* Current FH is target directory */
3919         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3920                 goto out;
3921         if ((status = decode_restorefh(&xdr)) != 0)
3922                 goto out;
3923         decode_getfattr(&xdr, res->old_fattr, res->server);
3924 out:
3925         return status;
3926 }
3927
3928 /*
3929  * Decode LINK response
3930  */
3931 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3932 {
3933         struct xdr_stream xdr;
3934         struct compound_hdr hdr;
3935         int status;
3936
3937         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3938         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3939                 goto out;
3940         if ((status = decode_putfh(&xdr)) != 0)
3941                 goto out;
3942         if ((status = decode_savefh(&xdr)) != 0)
3943                 goto out;
3944         if ((status = decode_putfh(&xdr)) != 0)
3945                 goto out;
3946         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3947                 goto out;
3948         /*
3949          * Note order: OP_LINK leaves the directory as the current
3950          *             filehandle.
3951          */
3952         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3953                 goto out;
3954         if ((status = decode_restorefh(&xdr)) != 0)
3955                 goto out;
3956         decode_getfattr(&xdr, res->fattr, res->server);
3957 out:
3958         return status;
3959 }
3960
3961 /*
3962  * Decode CREATE response
3963  */
3964 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3965 {
3966         struct xdr_stream xdr;
3967         struct compound_hdr hdr;
3968         int status;
3969
3970         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3971         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3972                 goto out;
3973         if ((status = decode_putfh(&xdr)) != 0)
3974                 goto out;
3975         if ((status = decode_savefh(&xdr)) != 0)
3976                 goto out;
3977         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3978                 goto out;
3979         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3980                 goto out;
3981         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3982                 goto out;
3983         if ((status = decode_restorefh(&xdr)) != 0)
3984                 goto out;
3985         decode_getfattr(&xdr, res->dir_fattr, res->server);
3986 out:
3987         return status;
3988 }
3989
3990 /*
3991  * Decode SYMLINK response
3992  */
3993 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3994 {
3995         return nfs4_xdr_dec_create(rqstp, p, res);
3996 }
3997
3998 /*
3999  * Decode GETATTR response
4000  */
4001 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4002 {
4003         struct xdr_stream xdr;
4004         struct compound_hdr hdr;
4005         int status;
4006
4007         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4008         status = decode_compound_hdr(&xdr, &hdr);
4009         if (status)
4010                 goto out;
4011         status = decode_putfh(&xdr);
4012         if (status)
4013                 goto out;
4014         status = decode_getfattr(&xdr, res->fattr, res->server);
4015 out:
4016         return status;
4017 }
4018
4019 /*
4020  * Encode an SETACL request
4021  */
4022 static int
4023 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4024 {
4025         struct xdr_stream xdr;
4026         struct compound_hdr hdr = {
4027                 .nops   = 0,
4028         };
4029         int status;
4030
4031         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4032         encode_compound_hdr(&xdr, req, &hdr);
4033         encode_putfh(&xdr, args->fh, &hdr);
4034         status = encode_setacl(&xdr, args, &hdr);
4035         encode_nops(&hdr);
4036         return status;
4037 }
4038
4039 /*
4040  * Decode SETACL response
4041  */
4042 static int
4043 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4044                     struct nfs_setaclres *res)
4045 {
4046         struct xdr_stream xdr;
4047         struct compound_hdr hdr;
4048         int status;
4049
4050         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4051         status = decode_compound_hdr(&xdr, &hdr);
4052         if (status)
4053                 goto out;
4054         status = decode_putfh(&xdr);
4055         if (status)
4056                 goto out;
4057         status = decode_setattr(&xdr);
4058 out:
4059         return status;
4060 }
4061
4062 /*
4063  * Decode GETACL response
4064  */
4065 static int
4066 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4067                     struct nfs_getaclres *res)
4068 {
4069         struct xdr_stream xdr;
4070         struct compound_hdr hdr;
4071         int status;
4072
4073         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4074         status = decode_compound_hdr(&xdr, &hdr);
4075         if (status)
4076                 goto out;
4077         status = decode_putfh(&xdr);
4078         if (status)
4079                 goto out;
4080         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4081
4082 out:
4083         return status;
4084 }
4085
4086 /*
4087  * Decode CLOSE response
4088  */
4089 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4090 {
4091         struct xdr_stream xdr;
4092         struct compound_hdr hdr;
4093         int status;
4094
4095         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4096         status = decode_compound_hdr(&xdr, &hdr);
4097         if (status)
4098                 goto out;
4099         status = decode_putfh(&xdr);
4100         if (status)
4101                 goto out;
4102         status = decode_close(&xdr, res);
4103         if (status != 0)
4104                 goto out;
4105         /*
4106          * Note: Server may do delete on close for this file
4107          *      in which case the getattr call will fail with
4108          *      an ESTALE error. Shouldn't be a problem,
4109          *      though, since fattr->valid will remain unset.
4110          */
4111         decode_getfattr(&xdr, res->fattr, res->server);
4112 out:
4113         return status;
4114 }
4115
4116 /*
4117  * Decode OPEN response
4118  */
4119 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4120 {
4121         struct xdr_stream xdr;
4122         struct compound_hdr hdr;
4123         int status;
4124
4125         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4126         status = decode_compound_hdr(&xdr, &hdr);
4127         if (status)
4128                 goto out;
4129         status = decode_putfh(&xdr);
4130         if (status)
4131                 goto out;
4132         status = decode_savefh(&xdr);
4133         if (status)
4134                 goto out;
4135         status = decode_open(&xdr, res);
4136         if (status)
4137                 goto out;
4138         if (decode_getfh(&xdr, &res->fh) != 0)
4139                 goto out;
4140         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4141                 goto out;
4142         if (decode_restorefh(&xdr) != 0)
4143                 goto out;
4144         decode_getfattr(&xdr, res->dir_attr, res->server);
4145 out:
4146         return status;
4147 }
4148
4149 /*
4150  * Decode OPEN_CONFIRM response
4151  */
4152 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4153 {
4154         struct xdr_stream xdr;
4155         struct compound_hdr hdr;
4156         int status;
4157
4158         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4159         status = decode_compound_hdr(&xdr, &hdr);
4160         if (status)
4161                 goto out;
4162         status = decode_putfh(&xdr);
4163         if (status)
4164                 goto out;
4165         status = decode_open_confirm(&xdr, res);
4166 out:
4167         return status;
4168 }
4169
4170 /*
4171  * Decode OPEN response
4172  */
4173 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4174 {
4175         struct xdr_stream xdr;
4176         struct compound_hdr hdr;
4177         int status;
4178
4179         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4180         status = decode_compound_hdr(&xdr, &hdr);
4181         if (status)
4182                 goto out;
4183         status = decode_putfh(&xdr);
4184         if (status)
4185                 goto out;
4186         status = decode_open(&xdr, res);
4187         if (status)
4188                 goto out;
4189         decode_getfattr(&xdr, res->f_attr, res->server);
4190 out:
4191         return status;
4192 }
4193
4194 /*
4195  * Decode SETATTR response
4196  */
4197 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4198 {
4199         struct xdr_stream xdr;
4200         struct compound_hdr hdr;
4201         int status;
4202
4203         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4204         status = decode_compound_hdr(&xdr, &hdr);
4205         if (status)
4206                 goto out;
4207         status = decode_putfh(&xdr);
4208         if (status)
4209                 goto out;
4210         status = decode_setattr(&xdr);
4211         if (status)
4212                 goto out;
4213         decode_getfattr(&xdr, res->fattr, res->server);
4214 out:
4215         return status;
4216 }
4217
4218 /*
4219  * Decode LOCK response
4220  */
4221 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4222 {
4223         struct xdr_stream xdr;
4224         struct compound_hdr hdr;
4225         int status;
4226
4227         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4228         status = decode_compound_hdr(&xdr, &hdr);
4229         if (status)
4230                 goto out;
4231         status = decode_putfh(&xdr);
4232         if (status)
4233                 goto out;
4234         status = decode_lock(&xdr, res);
4235 out:
4236         return status;
4237 }
4238
4239 /*
4240  * Decode LOCKT response
4241  */
4242 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4243 {
4244         struct xdr_stream xdr;
4245         struct compound_hdr hdr;
4246         int status;
4247
4248         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4249         status = decode_compound_hdr(&xdr, &hdr);
4250         if (status)
4251                 goto out;
4252         status = decode_putfh(&xdr);
4253         if (status)
4254                 goto out;
4255         status = decode_lockt(&xdr, res);
4256 out:
4257         return status;
4258 }
4259
4260 /*
4261  * Decode LOCKU response
4262  */
4263 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4264 {
4265         struct xdr_stream xdr;
4266         struct compound_hdr hdr;
4267         int status;
4268
4269         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4270         status = decode_compound_hdr(&xdr, &hdr);
4271         if (status)
4272                 goto out;
4273         status = decode_putfh(&xdr);
4274         if (status)
4275                 goto out;
4276         status = decode_locku(&xdr, res);
4277 out:
4278         return status;
4279 }
4280
4281 /*
4282  * Decode READLINK response
4283  */
4284 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4285                                  struct nfs4_readlink_res *res)
4286 {
4287         struct xdr_stream xdr;
4288         struct compound_hdr hdr;
4289         int status;
4290
4291         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4292         status = decode_compound_hdr(&xdr, &hdr);
4293         if (status)
4294                 goto out;
4295         status = decode_putfh(&xdr);
4296         if (status)
4297                 goto out;
4298         status = decode_readlink(&xdr, rqstp);
4299 out:
4300         return status;
4301 }
4302
4303 /*
4304  * Decode READDIR response
4305  */
4306 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4307 {
4308         struct xdr_stream xdr;
4309         struct compound_hdr hdr;
4310         int status;
4311
4312         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4313         status = decode_compound_hdr(&xdr, &hdr);
4314         if (status)
4315                 goto out;
4316         status = decode_putfh(&xdr);
4317         if (status)
4318                 goto out;
4319         status = decode_readdir(&xdr, rqstp, res);
4320 out:
4321         return status;
4322 }
4323
4324 /*
4325  * Decode Read response
4326  */
4327 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4328 {
4329         struct xdr_stream xdr;
4330         struct compound_hdr hdr;
4331         int status;
4332
4333         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4334         status = decode_compound_hdr(&xdr, &hdr);
4335         if (status)
4336                 goto out;
4337         status = decode_putfh(&xdr);
4338         if (status)
4339                 goto out;
4340         status = decode_read(&xdr, rqstp, res);
4341         if (!status)
4342                 status = res->count;
4343 out:
4344         return status;
4345 }
4346
4347 /*
4348  * Decode WRITE response
4349  */
4350 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4351 {
4352         struct xdr_stream xdr;
4353         struct compound_hdr hdr;
4354         int status;
4355
4356         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4357         status = decode_compound_hdr(&xdr, &hdr);
4358         if (status)
4359                 goto out;
4360         status = decode_putfh(&xdr);
4361         if (status)
4362                 goto out;
4363         status = decode_write(&xdr, res);
4364         if (status)
4365                 goto out;
4366         decode_getfattr(&xdr, res->fattr, res->server);
4367         if (!status)
4368                 status = res->count;
4369 out:
4370         return status;
4371 }
4372
4373 /*
4374  * Decode COMMIT response
4375  */
4376 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4377 {
4378         struct xdr_stream xdr;
4379         struct compound_hdr hdr;
4380         int status;
4381
4382         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4383         status = decode_compound_hdr(&xdr, &hdr);
4384         if (status)
4385                 goto out;
4386         status = decode_putfh(&xdr);
4387         if (status)
4388                 goto out;
4389         status = decode_commit(&xdr, res);
4390         if (status)
4391                 goto out;
4392         decode_getfattr(&xdr, res->fattr, res->server);
4393 out:
4394         return status;
4395 }
4396
4397 /*
4398  * FSINFO request
4399  */
4400 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
4401                                struct nfs4_fsinfo_res *res)
4402 {
4403         struct xdr_stream xdr;
4404         struct compound_hdr hdr;
4405         int status;
4406
4407         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4408         status = decode_compound_hdr(&xdr, &hdr);
4409         if (!status)
4410                 status = decode_putfh(&xdr);
4411         if (!status)
4412                 status = decode_fsinfo(&xdr, res->fsinfo);
4413         return status;
4414 }
4415
4416 /*
4417  * PATHCONF request
4418  */
4419 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
4420                                  struct nfs4_pathconf_res *res)
4421 {
4422         struct xdr_stream xdr;
4423         struct compound_hdr hdr;
4424         int status;
4425
4426         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4427         status = decode_compound_hdr(&xdr, &hdr);
4428         if (!status)
4429                 status = decode_putfh(&xdr);
4430         if (!status)
4431                 status = decode_pathconf(&xdr, res->pathconf);
4432         return status;
4433 }
4434
4435 /*
4436  * STATFS request
4437  */
4438 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
4439                                struct nfs4_statfs_res *res)
4440 {
4441         struct xdr_stream xdr;
4442         struct compound_hdr hdr;
4443         int status;
4444
4445         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4446         status = decode_compound_hdr(&xdr, &hdr);
4447         if (!status)
4448                 status = decode_putfh(&xdr);
4449         if (!status)
4450                 status = decode_statfs(&xdr, res->fsstat);
4451         return status;
4452 }
4453
4454 /*
4455  * GETATTR_BITMAP request
4456  */
4457 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4458 {
4459         struct xdr_stream xdr;
4460         struct compound_hdr hdr;
4461         int status;
4462
4463         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4464         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4465                 goto out;
4466         if ((status = decode_putfh(&xdr)) != 0)
4467                 goto out;
4468         status = decode_server_caps(&xdr, res);
4469 out:
4470         return status;
4471 }
4472
4473 /*
4474  * Decode RENEW response
4475  */
4476 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4477 {
4478         struct xdr_stream xdr;
4479         struct compound_hdr hdr;
4480         int status;
4481
4482         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4483         status = decode_compound_hdr(&xdr, &hdr);
4484         if (!status)
4485                 status = decode_renew(&xdr);
4486         return status;
4487 }
4488
4489 /*
4490  * a SETCLIENTID request
4491  */
4492 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4493                 struct nfs_client *clp)
4494 {
4495         struct xdr_stream xdr;
4496         struct compound_hdr hdr;
4497         int status;
4498
4499         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4500         status = decode_compound_hdr(&xdr, &hdr);
4501         if (!status)
4502                 status = decode_setclientid(&xdr, clp);
4503         return status;
4504 }
4505
4506 /*
4507  * a SETCLIENTID_CONFIRM request
4508  */
4509 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4510 {
4511         struct xdr_stream xdr;
4512         struct compound_hdr hdr;
4513         int status;
4514
4515         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4516         status = decode_compound_hdr(&xdr, &hdr);
4517         if (!status)
4518                 status = decode_setclientid_confirm(&xdr);
4519         if (!status)
4520                 status = decode_putrootfh(&xdr);
4521         if (!status)
4522                 status = decode_fsinfo(&xdr, fsinfo);
4523         return status;
4524 }
4525
4526 /*
4527  * DELEGRETURN request
4528  */
4529 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4530 {
4531         struct xdr_stream xdr;
4532         struct compound_hdr hdr;
4533         int status;
4534
4535         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4536         status = decode_compound_hdr(&xdr, &hdr);
4537         if (status != 0)
4538                 goto out;
4539         status = decode_putfh(&xdr);
4540         if (status != 0)
4541                 goto out;
4542         status = decode_delegreturn(&xdr);
4543         decode_getfattr(&xdr, res->fattr, res->server);
4544 out:
4545         return status;
4546 }
4547
4548 /*
4549  * FS_LOCATIONS request
4550  */
4551 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
4552                                      struct nfs4_fs_locations_res *res)
4553 {
4554         struct xdr_stream xdr;
4555         struct compound_hdr hdr;
4556         int status;
4557
4558         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4559         status = decode_compound_hdr(&xdr, &hdr);
4560         if (status != 0)
4561                 goto out;
4562         if ((status = decode_putfh(&xdr)) != 0)
4563                 goto out;
4564         if ((status = decode_lookup(&xdr)) != 0)
4565                 goto out;
4566         xdr_enter_page(&xdr, PAGE_SIZE);
4567         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
4568                                  res->fs_locations->server);
4569 out:
4570         return status;
4571 }
4572
4573 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4574 {
4575         uint32_t bitmap[2] = {0};
4576         uint32_t len;
4577
4578         if (!*p++) {
4579                 if (!*p)
4580                         return ERR_PTR(-EAGAIN);
4581                 entry->eof = 1;
4582                 return ERR_PTR(-EBADCOOKIE);
4583         }
4584
4585         entry->prev_cookie = entry->cookie;
4586         p = xdr_decode_hyper(p, &entry->cookie);
4587         entry->len = ntohl(*p++);
4588         entry->name = (const char *) p;
4589         p += XDR_QUADLEN(entry->len);
4590
4591         /*
4592          * In case the server doesn't return an inode number,
4593          * we fake one here.  (We don't use inode number 0,
4594          * since glibc seems to choke on it...)
4595          */
4596         entry->ino = 1;
4597
4598         len = ntohl(*p++);              /* bitmap length */
4599         if (len-- > 0) {
4600                 bitmap[0] = ntohl(*p++);
4601                 if (len-- > 0) {
4602                         bitmap[1] = ntohl(*p++);
4603                         p += len;
4604                 }
4605         }
4606         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4607         if (len > 0) {
4608                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4609                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4610                         /* Ignore the return value of rdattr_error for now */
4611                         p++;
4612                         len--;
4613                 }
4614                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4615                         xdr_decode_hyper(p, &entry->ino);
4616                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4617                         xdr_decode_hyper(p, &entry->ino);
4618                 p += len;
4619         }
4620
4621         entry->eof = !p[0] && p[1];
4622         return p;
4623 }
4624
4625 /*
4626  * We need to translate between nfs status return values and
4627  * the local errno values which may not be the same.
4628  */
4629 static struct {
4630         int stat;
4631         int errno;
4632 } nfs_errtbl[] = {
4633         { NFS4_OK,              0               },
4634         { NFS4ERR_PERM,         -EPERM          },
4635         { NFS4ERR_NOENT,        -ENOENT         },
4636         { NFS4ERR_IO,           -errno_NFSERR_IO},
4637         { NFS4ERR_NXIO,         -ENXIO          },
4638         { NFS4ERR_ACCESS,       -EACCES         },
4639         { NFS4ERR_EXIST,        -EEXIST         },
4640         { NFS4ERR_XDEV,         -EXDEV          },
4641         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4642         { NFS4ERR_ISDIR,        -EISDIR         },
4643         { NFS4ERR_INVAL,        -EINVAL         },
4644         { NFS4ERR_FBIG,         -EFBIG          },
4645         { NFS4ERR_NOSPC,        -ENOSPC         },
4646         { NFS4ERR_ROFS,         -EROFS          },
4647         { NFS4ERR_MLINK,        -EMLINK         },
4648         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4649         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4650         { NFS4ERR_DQUOT,        -EDQUOT         },
4651         { NFS4ERR_STALE,        -ESTALE         },
4652         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4653         { NFS4ERR_BADOWNER,     -EINVAL         },
4654         { NFS4ERR_BADNAME,      -EINVAL         },
4655         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4656         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4657         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4658         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4659         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4660         { NFS4ERR_LOCKED,       -EAGAIN         },
4661         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4662         { NFS4ERR_SYMLINK,      -ELOOP          },
4663         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4664         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4665         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4666                                                     * to be handled by a
4667                                                     * middle-layer.
4668                                                     */
4669         { -1,                   -EIO            }
4670 };
4671
4672 /*
4673  * Convert an NFS error code to a local one.
4674  * This one is used jointly by NFSv2 and NFSv3.
4675  */
4676 static int
4677 nfs4_stat_to_errno(int stat)
4678 {
4679         int i;
4680         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4681                 if (nfs_errtbl[i].stat == stat)
4682                         return nfs_errtbl[i].errno;
4683         }
4684         if (stat <= 10000 || stat > 10100) {
4685                 /* The server is looney tunes. */
4686                 return -ESERVERFAULT;
4687         }
4688         /* If we cannot translate the error, the recovery routines should
4689          * handle it.
4690          * Note: remaining NFSv4 error codes have values > 10000, so should
4691          * not conflict with native Linux error codes.
4692          */
4693         return -stat;
4694 }
4695
4696 #define PROC(proc, argtype, restype)                            \
4697 [NFSPROC4_CLNT_##proc] = {                                      \
4698         .p_proc   = NFSPROC4_COMPOUND,                          \
4699         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4700         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4701         .p_arglen = NFS4_##argtype##_sz,                        \
4702         .p_replen = NFS4_##restype##_sz,                        \
4703         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4704         .p_name   = #proc,                                      \
4705 }
4706
4707 struct rpc_procinfo     nfs4_procedures[] = {
4708   PROC(READ,            enc_read,       dec_read),
4709   PROC(WRITE,           enc_write,      dec_write),
4710   PROC(COMMIT,          enc_commit,     dec_commit),
4711   PROC(OPEN,            enc_open,       dec_open),
4712   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4713   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4714   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4715   PROC(CLOSE,           enc_close,      dec_close),
4716   PROC(SETATTR,         enc_setattr,    dec_setattr),
4717   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4718   PROC(RENEW,           enc_renew,      dec_renew),
4719   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4720   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4721   PROC(LOCK,            enc_lock,       dec_lock),
4722   PROC(LOCKT,           enc_lockt,      dec_lockt),
4723   PROC(LOCKU,           enc_locku,      dec_locku),
4724   PROC(ACCESS,          enc_access,     dec_access),
4725   PROC(GETATTR,         enc_getattr,    dec_getattr),
4726   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4727   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4728   PROC(REMOVE,          enc_remove,     dec_remove),
4729   PROC(RENAME,          enc_rename,     dec_rename),
4730   PROC(LINK,            enc_link,       dec_link),
4731   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4732   PROC(CREATE,          enc_create,     dec_create),
4733   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4734   PROC(STATFS,          enc_statfs,     dec_statfs),
4735   PROC(READLINK,        enc_readlink,   dec_readlink),
4736   PROC(READDIR,         enc_readdir,    dec_readdir),
4737   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4738   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4739   PROC(GETACL,          enc_getacl,     dec_getacl),
4740   PROC(SETACL,          enc_setacl,     dec_setacl),
4741   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4742 };
4743
4744 struct rpc_version              nfs_version4 = {
4745         .number                 = 4,
4746         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4747         .procs                  = nfs4_procedures
4748 };
4749
4750 /*
4751  * Local variables:
4752  *  c-basic-offset: 8
4753  * End:
4754  */