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 encode_rename_maxsz     (op_encode_hdr_maxsz + \
 196                                 2 * nfs4_name_maxsz)
 197 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 198 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 199                                 nfs4_name_maxsz)
 200 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 201 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 202                                  7 + \
 203                                  1 + encode_stateid_maxsz + 8)
 204 #define decode_lock_denied_maxsz \
 205                                 (8 + decode_lockowner_maxsz)
 206 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 207                                  decode_lock_denied_maxsz)
 208 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 209 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 212                                  encode_stateid_maxsz + \
 213                                  4)
 214 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_stateid_maxsz)
 216 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 217 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 218 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 219                                 1 + nfs4_name_maxsz + \
 220                                 1 + \
 221                                 nfs4_fattr_maxsz)
 222 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 223 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 224                                 1 + 2 + nfs4_name_maxsz + \
 225                                 encode_attrs_maxsz)
 226 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 nfs4_fattr_bitmap_maxsz)
 229 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 230 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 233 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 234 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 235                                  nfs4_fattr_bitmap_maxsz + 1)
 236 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 237                                  encode_stateid_maxsz + 3)
 238 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 239 #define encode_fs_locations_maxsz \
 240                                 (encode_getattr_maxsz)
 241 #define decode_fs_locations_maxsz \
 242                                 (0)
 243 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 244 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 245 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 246                                 encode_putfh_maxsz + \
 247                                 encode_read_maxsz)
 248 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 249                                 decode_putfh_maxsz + \
 250                                 decode_read_maxsz)
 251 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 252                                 encode_putfh_maxsz + \
 253                                 encode_readlink_maxsz)
 254 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 decode_readlink_maxsz)
 257 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 258                                 encode_putfh_maxsz + \
 259                                 encode_readdir_maxsz)
 260 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_readdir_maxsz)
 263 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 264                                 encode_putfh_maxsz + \
 265                                 encode_write_maxsz + \
 266                                 encode_getattr_maxsz)
 267 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_write_maxsz + \
 270                                 decode_getattr_maxsz)
 271 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 encode_commit_maxsz + \
 274                                 encode_getattr_maxsz)
 275 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 276                                 decode_putfh_maxsz + \
 277                                 decode_commit_maxsz + \
 278                                 decode_getattr_maxsz)
 279 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_putfh_maxsz + \
 281                                 encode_savefh_maxsz + \
 282                                 encode_open_maxsz + \
 283                                 encode_getfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 encode_restorefh_maxsz + \
 286                                 encode_getattr_maxsz)
 287 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 288                                 decode_putfh_maxsz + \
 289                                 decode_savefh_maxsz + \
 290                                 decode_open_maxsz + \
 291                                 decode_getfh_maxsz + \
 292                                 decode_getattr_maxsz + \
 293                                 decode_restorefh_maxsz + \
 294                                 decode_getattr_maxsz)
 295 #define NFS4_enc_open_confirm_sz \
 296                                 (compound_encode_hdr_maxsz + \
 297                                  encode_putfh_maxsz + \
 298                                  encode_open_confirm_maxsz)
 299 #define NFS4_dec_open_confirm_sz \
 300                                 (compound_decode_hdr_maxsz + \
 301                                  decode_putfh_maxsz + \
 302                                  decode_open_confirm_maxsz)
 303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 304                                         encode_putfh_maxsz + \
 305                                         encode_open_maxsz + \
 306                                         encode_getattr_maxsz)
 307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 308                                         decode_putfh_maxsz + \
 309                                         decode_open_maxsz + \
 310                                         decode_getattr_maxsz)
 311 #define NFS4_enc_open_downgrade_sz \
 312                                 (compound_encode_hdr_maxsz + \
 313                                  encode_putfh_maxsz + \
 314                                  encode_open_downgrade_maxsz + \
 315                                  encode_getattr_maxsz)
 316 #define NFS4_dec_open_downgrade_sz \
 317                                 (compound_decode_hdr_maxsz + \
 318                                  decode_putfh_maxsz + \
 319                                  decode_open_downgrade_maxsz + \
 320                                  decode_getattr_maxsz)
 321 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 322                                  encode_putfh_maxsz + \
 323                                  encode_close_maxsz + \
 324                                  encode_getattr_maxsz)
 325 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 326                                  decode_putfh_maxsz + \
 327                                  decode_close_maxsz + \
 328                                  decode_getattr_maxsz)
 329 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 330                                  encode_putfh_maxsz + \
 331                                  encode_setattr_maxsz + \
 332                                  encode_getattr_maxsz)
 333 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 334                                  decode_putfh_maxsz + \
 335                                  decode_setattr_maxsz + \
 336                                  decode_getattr_maxsz)
 337 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_fsinfo_maxsz)
 340 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_fsinfo_maxsz)
 343 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 344                                 encode_renew_maxsz)
 345 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 346                                 decode_renew_maxsz)
 347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 348                                 encode_setclientid_maxsz)
 349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 350                                 decode_setclientid_maxsz)
 351 #define NFS4_enc_setclientid_confirm_sz \
 352                                 (compound_encode_hdr_maxsz + \
 353                                 encode_setclientid_confirm_maxsz + \
 354                                 encode_putrootfh_maxsz + \
 355                                 encode_fsinfo_maxsz)
 356 #define NFS4_dec_setclientid_confirm_sz \
 357                                 (compound_decode_hdr_maxsz + \
 358                                 decode_setclientid_confirm_maxsz + \
 359                                 decode_putrootfh_maxsz + \
 360                                 decode_fsinfo_maxsz)
 361 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_lock_maxsz)
 364 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_lock_maxsz)
 367 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_lockt_maxsz)
 370 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 371                                  decode_putfh_maxsz + \
 372                                  decode_lockt_maxsz)
 373 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_putfh_maxsz + \
 375                                 encode_locku_maxsz)
 376 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_locku_maxsz)
 379 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_access_maxsz + \
 382                                 encode_getattr_maxsz)
 383 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_access_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_getattr_maxsz)
 390 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 391                                 decode_putfh_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_lookup_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_getfh_maxsz)
 398 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 399                                 decode_putfh_maxsz + \
 400                                 decode_lookup_maxsz + \
 401                                 decode_getattr_maxsz + \
 402                                 decode_getfh_maxsz)
 403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 404                                 encode_putrootfh_maxsz + \
 405                                 encode_getattr_maxsz + \
 406                                 encode_getfh_maxsz)
 407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 408                                 decode_putrootfh_maxsz + \
 409                                 decode_getattr_maxsz + \
 410                                 decode_getfh_maxsz)
 411 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_remove_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_putfh_maxsz + \
 417                                 op_decode_hdr_maxsz + 5 + \
 418                                 decode_getattr_maxsz)
 419 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_savefh_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_rename_maxsz + \
 424                                 encode_getattr_maxsz + \
 425                                 encode_restorefh_maxsz + \
 426                                 encode_getattr_maxsz)
 427 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_savefh_maxsz + \
 430                                 decode_putfh_maxsz + \
 431                                 decode_rename_maxsz + \
 432                                 decode_getattr_maxsz + \
 433                                 decode_restorefh_maxsz + \
 434                                 decode_getattr_maxsz)
 435 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 436                                 encode_putfh_maxsz + \
 437                                 encode_savefh_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_link_maxsz + \
 440                                 decode_getattr_maxsz + \
 441                                 encode_restorefh_maxsz + \
 442                                 decode_getattr_maxsz)
 443 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_savefh_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_link_maxsz + \
 448                                 decode_getattr_maxsz + \
 449                                 decode_restorefh_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_putfh_maxsz + \
 453                                 encode_symlink_maxsz + \
 454                                 encode_getattr_maxsz + \
 455                                 encode_getfh_maxsz)
 456 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_symlink_maxsz + \
 459                                 decode_getattr_maxsz + \
 460                                 decode_getfh_maxsz)
 461 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_savefh_maxsz + \
 464                                 encode_create_maxsz + \
 465                                 encode_getfh_maxsz + \
 466                                 encode_getattr_maxsz + \
 467                                 encode_restorefh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_savefh_maxsz + \
 472                                 decode_create_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz + \
 475                                 decode_restorefh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 478                                 encode_putfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_statfs_maxsz)
 486 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_statfs_maxsz)
 489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_getattr_maxsz)
 492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_getattr_maxsz)
 495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 496                                 encode_putfh_maxsz + \
 497                                 encode_delegreturn_maxsz + \
 498                                 encode_getattr_maxsz)
 499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 500                                 decode_delegreturn_maxsz + \
 501                                 decode_getattr_maxsz)
 502 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_putfh_maxsz + \
 504                                 encode_getacl_maxsz)
 505 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_getacl_maxsz)
 508 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_setacl_maxsz)
 511 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 512                                 decode_putfh_maxsz + \
 513                                 decode_setacl_maxsz)
 514 #define NFS4_enc_fs_locations_sz \
 515                                 (compound_encode_hdr_maxsz + \
 516                                  encode_putfh_maxsz + \
 517                                  encode_lookup_maxsz + \
 518                                  encode_fs_locations_maxsz)
 519 #define NFS4_dec_fs_locations_sz \
 520                                 (compound_decode_hdr_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_lookup_maxsz + \
 523                                  decode_fs_locations_maxsz)
 524
 525 static struct {
 526         unsigned int    mode;
 527         unsigned int    nfs2type;
 528 } nfs_type2fmt[] = {
 529         { 0,            NFNON        },
 530         { S_IFREG,      NFREG        },
 531         { S_IFDIR,      NFDIR        },
 532         { S_IFBLK,      NFBLK        },
 533         { S_IFCHR,      NFCHR        },
 534         { S_IFLNK,      NFLNK        },
 535         { S_IFSOCK,     NFSOCK       },
 536         { S_IFIFO,      NFFIFO       },
 537         { 0,            NFNON        },
 538         { 0,            NFNON        },
 539 };
 540
 541 struct compound_hdr {
 542         int32_t         status;
 543         uint32_t        nops;
 544         __be32 *        nops_p;
 545         uint32_t        taglen;
 546         char *          tag;
 547 };
 548
 549 /*
 550  * START OF "GENERIC" ENCODE ROUTINES.
 551  *   These may look a little ugly since they are imported from a "generic"
 552  * set of XDR encode/decode routines which are intended to be shared by
 553  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 554  *
 555  * If the pain of reading these is too great, it should be a straightforward
 556  * task to translate them into Linux-specific versions which are more
 557  * consistent with the style used in NFSv2/v3...
 558  */
 559 #define WRITE32(n)               *p++ = htonl(n)
 560 #define WRITE64(n)               do {                           \
 561         *p++ = htonl((uint32_t)((n) >> 32));                            \
 562         *p++ = htonl((uint32_t)(n));                                    \
 563 } while (0)
 564 #define WRITEMEM(ptr,nbytes)     do {                           \
 565         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 566 } while (0)
 567
 568 #define RESERVE_SPACE(nbytes)   do {                            \
 569         p = xdr_reserve_space(xdr, nbytes);                     \
 570         BUG_ON(!p);                                             \
 571 } while (0)
 572
 573 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 574 {
 575         __be32 *p;
 576
 577         p = xdr_reserve_space(xdr, 4 + len);
 578         BUG_ON(p == NULL);
 579         xdr_encode_opaque(p, str, len);
 580 }
 581
 582 static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 583 {
 584         __be32 *p;
 585
 586         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 587         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 588         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 589         WRITE32(hdr->taglen);
 590         WRITEMEM(hdr->tag, hdr->taglen);
 591         WRITE32(NFS4_MINOR_VERSION);
 592         hdr->nops_p = p;
 593         WRITE32(hdr->nops);
 594 }
 595
 596 static void encode_nops(struct compound_hdr *hdr)
 597 {
 598         *hdr->nops_p = htonl(hdr->nops);
 599 }
 600
 601 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 602 {
 603         __be32 *p;
 604
 605         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 606         BUG_ON(p == NULL);
 607         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 608 }
 609
 610 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 611 {
 612         char owner_name[IDMAP_NAMESZ];
 613         char owner_group[IDMAP_NAMESZ];
 614         int owner_namelen = 0;
 615         int owner_grouplen = 0;
 616         __be32 *p;
 617         __be32 *q;
 618         int len;
 619         uint32_t bmval0 = 0;
 620         uint32_t bmval1 = 0;
 621         int status;
 622
 623         /*
 624          * We reserve enough space to write the entire attribute buffer at once.
 625          * In the worst-case, this would be
 626          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 627          *          = 36 bytes, plus any contribution from variable-length fields
 628          *            such as owner/group.
 629          */
 630         len = 16;
 631
 632         /* Sigh */
 633         if (iap->ia_valid & ATTR_SIZE)
 634                 len += 8;
 635         if (iap->ia_valid & ATTR_MODE)
 636                 len += 4;
 637         if (iap->ia_valid & ATTR_UID) {
 638                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 639                 if (owner_namelen < 0) {
 640                         dprintk("nfs: couldn't resolve uid %d to string\n",
 641                                         iap->ia_uid);
 642                         /* XXX */
 643                         strcpy(owner_name, "nobody");
 644                         owner_namelen = sizeof("nobody") - 1;
 645                         /* goto out; */
 646                 }
 647                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 648         }
 649         if (iap->ia_valid & ATTR_GID) {
 650                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 651                 if (owner_grouplen < 0) {
 652                         dprintk("nfs: couldn't resolve gid %d to string\n",
 653                                         iap->ia_gid);
 654                         strcpy(owner_group, "nobody");
 655                         owner_grouplen = sizeof("nobody") - 1;
 656                         /* goto out; */
 657                 }
 658                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 659         }
 660         if (iap->ia_valid & ATTR_ATIME_SET)
 661                 len += 16;
 662         else if (iap->ia_valid & ATTR_ATIME)
 663                 len += 4;
 664         if (iap->ia_valid & ATTR_MTIME_SET)
 665                 len += 16;
 666         else if (iap->ia_valid & ATTR_MTIME)
 667                 len += 4;
 668         RESERVE_SPACE(len);
 669
 670         /*
 671          * We write the bitmap length now, but leave the bitmap and the attribute
 672          * buffer length to be backfilled at the end of this routine.
 673          */
 674         WRITE32(2);
 675         q = p;
 676         p += 3;
 677
 678         if (iap->ia_valid & ATTR_SIZE) {
 679                 bmval0 |= FATTR4_WORD0_SIZE;
 680                 WRITE64(iap->ia_size);
 681         }
 682         if (iap->ia_valid & ATTR_MODE) {
 683                 bmval1 |= FATTR4_WORD1_MODE;
 684                 WRITE32(iap->ia_mode & S_IALLUGO);
 685         }
 686         if (iap->ia_valid & ATTR_UID) {
 687                 bmval1 |= FATTR4_WORD1_OWNER;
 688                 WRITE32(owner_namelen);
 689                 WRITEMEM(owner_name, owner_namelen);
 690         }
 691         if (iap->ia_valid & ATTR_GID) {
 692                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 693                 WRITE32(owner_grouplen);
 694                 WRITEMEM(owner_group, owner_grouplen);
 695         }
 696         if (iap->ia_valid & ATTR_ATIME_SET) {
 697                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 698                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 699                 WRITE32(0);
 700                 WRITE32(iap->ia_mtime.tv_sec);
 701                 WRITE32(iap->ia_mtime.tv_nsec);
 702         }
 703         else if (iap->ia_valid & ATTR_ATIME) {
 704                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 705                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 706         }
 707         if (iap->ia_valid & ATTR_MTIME_SET) {
 708                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 709                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 710                 WRITE32(0);
 711                 WRITE32(iap->ia_mtime.tv_sec);
 712                 WRITE32(iap->ia_mtime.tv_nsec);
 713         }
 714         else if (iap->ia_valid & ATTR_MTIME) {
 715                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 716                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 717         }
 718
 719         /*
 720          * Now we backfill the bitmap and the attribute buffer length.
 721          */
 722         if (len != ((char *)p - (char *)q) + 4) {
 723                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 724                                 len, ((char *)p - (char *)q) + 4);
 725                 BUG();
 726         }
 727         len = (char *)p - (char *)q - 12;
 728         *q++ = htonl(bmval0);
 729         *q++ = htonl(bmval1);
 730         *q++ = htonl(len);
 731
 732         status = 0;
 733 /* out: */
 734         return status;
 735 }
 736
 737 static int encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 738 {
 739         __be32 *p;
 740
 741         RESERVE_SPACE(8);
 742         WRITE32(OP_ACCESS);
 743         WRITE32(access);
 744         hdr->nops++;
 745
 746         return 0;
 747 }
 748
 749 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 750 {
 751         __be32 *p;
 752
 753         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 754         WRITE32(OP_CLOSE);
 755         WRITE32(arg->seqid->sequence->counter);
 756         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 757         hdr->nops++;
 758
 759         return 0;
 760 }
 761
 762 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 763 {
 764         __be32 *p;
 765
 766         RESERVE_SPACE(16);
 767         WRITE32(OP_COMMIT);
 768         WRITE64(args->offset);
 769         WRITE32(args->count);
 770         hdr->nops++;
 771
 772         return 0;
 773 }
 774
 775 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 776 {
 777         __be32 *p;
 778
 779         RESERVE_SPACE(8);
 780         WRITE32(OP_CREATE);
 781         WRITE32(create->ftype);
 782
 783         switch (create->ftype) {
 784         case NF4LNK:
 785                 RESERVE_SPACE(4);
 786                 WRITE32(create->u.symlink.len);
 787                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 788                 break;
 789
 790         case NF4BLK: case NF4CHR:
 791                 RESERVE_SPACE(8);
 792                 WRITE32(create->u.device.specdata1);
 793                 WRITE32(create->u.device.specdata2);
 794                 break;
 795
 796         default:
 797                 break;
 798         }
 799
 800         RESERVE_SPACE(4 + create->name->len);
 801         WRITE32(create->name->len);
 802         WRITEMEM(create->name->name, create->name->len);
 803         hdr->nops++;
 804
 805         return encode_attrs(xdr, create->attrs, create->server);
 806 }
 807
 808 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 809 {
 810         __be32 *p;
 811
 812         RESERVE_SPACE(12);
 813         WRITE32(OP_GETATTR);
 814         WRITE32(1);
 815         WRITE32(bitmap);
 816         hdr->nops++;
 817         return 0;
 818 }
 819
 820 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 821 {
 822         __be32 *p;
 823
 824         RESERVE_SPACE(16);
 825         WRITE32(OP_GETATTR);
 826         WRITE32(2);
 827         WRITE32(bm0);
 828         WRITE32(bm1);
 829         hdr->nops++;
 830         return 0;
 831 }
 832
 833 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 834 {
 835         return encode_getattr_two(xdr,
 836                         bitmask[0] & nfs4_fattr_bitmap[0],
 837                         bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 838 }
 839
 840 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 841 {
 842         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 843                         bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 844 }
 845
 846 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 847 {
 848         return encode_getattr_two(xdr,
 849                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 850                                   bitmask[1] & nfs4_fs_locations_bitmap[1],
 851                                   hdr);
 852 }
 853
 854 static int encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 855 {
 856         __be32 *p;
 857
 858         RESERVE_SPACE(4);
 859         WRITE32(OP_GETFH);
 860         hdr->nops++;
 861
 862         return 0;
 863 }
 864
 865 static int encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 866 {
 867         __be32 *p;
 868
 869         RESERVE_SPACE(8 + name->len);
 870         WRITE32(OP_LINK);
 871         WRITE32(name->len);
 872         WRITEMEM(name->name, name->len);
 873         hdr->nops++;
 874
 875         return 0;
 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 int 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
 924         return 0;
 925 }
 926
 927 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 928 {
 929         __be32 *p;
 930
 931         RESERVE_SPACE(52);
 932         WRITE32(OP_LOCKT);
 933         WRITE32(nfs4_lock_type(args->fl, 0));
 934         WRITE64(args->fl->fl_start);
 935         WRITE64(nfs4_lock_length(args->fl));
 936         WRITE64(args->lock_owner.clientid);
 937         WRITE32(16);
 938         WRITEMEM("lock id:", 8);
 939         WRITE64(args->lock_owner.id);
 940         hdr->nops++;
 941
 942         return 0;
 943 }
 944
 945 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 946 {
 947         __be32 *p;
 948
 949         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 950         WRITE32(OP_LOCKU);
 951         WRITE32(nfs4_lock_type(args->fl, 0));
 952         WRITE32(args->seqid->sequence->counter);
 953         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 954         WRITE64(args->fl->fl_start);
 955         WRITE64(nfs4_lock_length(args->fl));
 956         hdr->nops++;
 957
 958         return 0;
 959 }
 960
 961 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 962 {
 963         int len = name->len;
 964         __be32 *p;
 965
 966         RESERVE_SPACE(8 + len);
 967         WRITE32(OP_LOOKUP);
 968         WRITE32(len);
 969         WRITEMEM(name->name, len);
 970         hdr->nops++;
 971
 972         return 0;
 973 }
 974
 975 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 976 {
 977         __be32 *p;
 978
 979         RESERVE_SPACE(8);
 980         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 981         case FMODE_READ:
 982                 WRITE32(NFS4_SHARE_ACCESS_READ);
 983                 break;
 984         case FMODE_WRITE:
 985                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 986                 break;
 987         case FMODE_READ|FMODE_WRITE:
 988                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 989                 break;
 990         default:
 991                 WRITE32(0);
 992         }
 993         WRITE32(0);             /* for linux, share_deny = 0 always */
 994 }
 995
 996 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 997 {
 998         __be32 *p;
 999  /*
1000  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1001  * owner 4 = 32
1002  */
1003         RESERVE_SPACE(8);
1004         WRITE32(OP_OPEN);
1005         WRITE32(arg->seqid->sequence->counter);
1006         encode_share_access(xdr, arg->fmode);
1007         RESERVE_SPACE(28);
1008         WRITE64(arg->clientid);
1009         WRITE32(16);
1010         WRITEMEM("open id:", 8);
1011         WRITE64(arg->id);
1012 }
1013
1014 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1015 {
1016         __be32 *p;
1017
1018         RESERVE_SPACE(4);
1019         switch(arg->open_flags & O_EXCL) {
1020         case 0:
1021                 WRITE32(NFS4_CREATE_UNCHECKED);
1022                 encode_attrs(xdr, arg->u.attrs, arg->server);
1023                 break;
1024         default:
1025                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1026                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1027         }
1028 }
1029
1030 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1031 {
1032         __be32 *p;
1033
1034         RESERVE_SPACE(4);
1035         switch (arg->open_flags & O_CREAT) {
1036         case 0:
1037                 WRITE32(NFS4_OPEN_NOCREATE);
1038                 break;
1039         default:
1040                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1041                 WRITE32(NFS4_OPEN_CREATE);
1042                 encode_createmode(xdr, arg);
1043         }
1044 }
1045
1046 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1047 {
1048         __be32 *p;
1049
1050         RESERVE_SPACE(4);
1051         switch (delegation_type) {
1052         case 0:
1053                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1054                 break;
1055         case FMODE_READ:
1056                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1057                 break;
1058         case FMODE_WRITE|FMODE_READ:
1059                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1060                 break;
1061         default:
1062                 BUG();
1063         }
1064 }
1065
1066 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1067 {
1068         __be32 *p;
1069
1070         RESERVE_SPACE(4);
1071         WRITE32(NFS4_OPEN_CLAIM_NULL);
1072         encode_string(xdr, name->len, name->name);
1073 }
1074
1075 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1076 {
1077         __be32 *p;
1078
1079         RESERVE_SPACE(4);
1080         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1081         encode_delegation_type(xdr, type);
1082 }
1083
1084 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1085 {
1086         __be32 *p;
1087
1088         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1089         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1090         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1091         encode_string(xdr, name->len, name->name);
1092 }
1093
1094 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1095 {
1096         encode_openhdr(xdr, arg);
1097         encode_opentype(xdr, arg);
1098         switch (arg->claim) {
1099         case NFS4_OPEN_CLAIM_NULL:
1100                 encode_claim_null(xdr, arg->name);
1101                 break;
1102         case NFS4_OPEN_CLAIM_PREVIOUS:
1103                 encode_claim_previous(xdr, arg->u.delegation_type);
1104                 break;
1105         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1106                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1107                 break;
1108         default:
1109                 BUG();
1110         }
1111         hdr->nops++;
1112         return 0;
1113 }
1114
1115 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1116 {
1117         __be32 *p;
1118
1119         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1120         WRITE32(OP_OPEN_CONFIRM);
1121         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1122         WRITE32(arg->seqid->sequence->counter);
1123         hdr->nops++;
1124
1125         return 0;
1126 }
1127
1128 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1129 {
1130         __be32 *p;
1131
1132         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1133         WRITE32(OP_OPEN_DOWNGRADE);
1134         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1135         WRITE32(arg->seqid->sequence->counter);
1136         encode_share_access(xdr, arg->fmode);
1137         hdr->nops++;
1138         return 0;
1139 }
1140
1141 static int
1142 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1143 {
1144         int len = fh->size;
1145         __be32 *p;
1146
1147         RESERVE_SPACE(8 + len);
1148         WRITE32(OP_PUTFH);
1149         WRITE32(len);
1150         WRITEMEM(fh->data, len);
1151         hdr->nops++;
1152
1153         return 0;
1154 }
1155
1156 static int encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1157 {
1158         __be32 *p;
1159
1160         RESERVE_SPACE(4);
1161         WRITE32(OP_PUTROOTFH);
1162         hdr->nops++;
1163
1164         return 0;
1165 }
1166
1167 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1168 {
1169         nfs4_stateid stateid;
1170         __be32 *p;
1171
1172         RESERVE_SPACE(NFS4_STATEID_SIZE);
1173         if (ctx->state != NULL) {
1174                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1175                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1176         } else
1177                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1178 }
1179
1180 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1181 {
1182         __be32 *p;
1183
1184         RESERVE_SPACE(4);
1185         WRITE32(OP_READ);
1186
1187         encode_stateid(xdr, args->context);
1188
1189         RESERVE_SPACE(12);
1190         WRITE64(args->offset);
1191         WRITE32(args->count);
1192         hdr->nops++;
1193
1194         return 0;
1195 }
1196
1197 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1198 {
1199         uint32_t attrs[2] = {
1200                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1201                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1202         };
1203         __be32 *p;
1204
1205         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1206         WRITE32(OP_READDIR);
1207         WRITE64(readdir->cookie);
1208         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1209         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1210         WRITE32(readdir->count);
1211         WRITE32(2);
1212         /* Switch to mounted_on_fileid if the server supports it */
1213         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1214                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1215         else
1216                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1217         WRITE32(attrs[0] & readdir->bitmask[0]);
1218         WRITE32(attrs[1] & readdir->bitmask[1]);
1219         hdr->nops++;
1220         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1221                         __func__,
1222                         (unsigned long long)readdir->cookie,
1223                         ((u32 *)readdir->verifier.data)[0],
1224                         ((u32 *)readdir->verifier.data)[1],
1225                         attrs[0] & readdir->bitmask[0],
1226                         attrs[1] & readdir->bitmask[1]);
1227
1228         return 0;
1229 }
1230
1231 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1232 {
1233         __be32 *p;
1234
1235         RESERVE_SPACE(4);
1236         WRITE32(OP_READLINK);
1237         hdr->nops++;
1238
1239         return 0;
1240 }
1241
1242 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1243 {
1244         __be32 *p;
1245
1246         RESERVE_SPACE(8 + name->len);
1247         WRITE32(OP_REMOVE);
1248         WRITE32(name->len);
1249         WRITEMEM(name->name, name->len);
1250         hdr->nops++;
1251
1252         return 0;
1253 }
1254
1255 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1256 {
1257         __be32 *p;
1258
1259         RESERVE_SPACE(8 + oldname->len);
1260         WRITE32(OP_RENAME);
1261         WRITE32(oldname->len);
1262         WRITEMEM(oldname->name, oldname->len);
1263
1264         RESERVE_SPACE(4 + newname->len);
1265         WRITE32(newname->len);
1266         WRITEMEM(newname->name, newname->len);
1267         hdr->nops++;
1268
1269         return 0;
1270 }
1271
1272 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         RESERVE_SPACE(12);
1277         WRITE32(OP_RENEW);
1278         WRITE64(client_stateid->cl_clientid);
1279         hdr->nops++;
1280
1281         return 0;
1282 }
1283
1284 static int
1285 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1286 {
1287         __be32 *p;
1288
1289         RESERVE_SPACE(4);
1290         WRITE32(OP_RESTOREFH);
1291         hdr->nops++;
1292
1293         return 0;
1294 }
1295
1296 static int
1297 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1298 {
1299         __be32 *p;
1300
1301         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1302         WRITE32(OP_SETATTR);
1303         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1304         RESERVE_SPACE(2*4);
1305         WRITE32(1);
1306         WRITE32(FATTR4_WORD0_ACL);
1307         if (arg->acl_len % 4)
1308                 return -EINVAL;
1309         RESERVE_SPACE(4);
1310         WRITE32(arg->acl_len);
1311         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1312         hdr->nops++;
1313         return 0;
1314 }
1315
1316 static int
1317 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1318 {
1319         __be32 *p;
1320
1321         RESERVE_SPACE(4);
1322         WRITE32(OP_SAVEFH);
1323         hdr->nops++;
1324
1325         return 0;
1326 }
1327
1328 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1329 {
1330         int status;
1331         __be32 *p;
1332
1333         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1334         WRITE32(OP_SETATTR);
1335         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1336         hdr->nops++;
1337
1338         if ((status = encode_attrs(xdr, arg->iap, server)))
1339                 return status;
1340
1341         return 0;
1342 }
1343
1344 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1345 {
1346         __be32 *p;
1347
1348         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1349         WRITE32(OP_SETCLIENTID);
1350         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1351
1352         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1353         RESERVE_SPACE(4);
1354         WRITE32(setclientid->sc_prog);
1355         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1356         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1357         RESERVE_SPACE(4);
1358         WRITE32(setclientid->sc_cb_ident);
1359         hdr->nops++;
1360
1361         return 0;
1362 }
1363
1364 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1365 {
1366         __be32 *p;
1367
1368         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1369         WRITE32(OP_SETCLIENTID_CONFIRM);
1370         WRITE64(client_state->cl_clientid);
1371         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1372         hdr->nops++;
1373
1374         return 0;
1375 }
1376
1377 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1378 {
1379         __be32 *p;
1380
1381         RESERVE_SPACE(4);
1382         WRITE32(OP_WRITE);
1383
1384         encode_stateid(xdr, args->context);
1385
1386         RESERVE_SPACE(16);
1387         WRITE64(args->offset);
1388         WRITE32(args->stable);
1389         WRITE32(args->count);
1390
1391         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1392         hdr->nops++;
1393
1394         return 0;
1395 }
1396
1397 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1398 {
1399         __be32 *p;
1400
1401         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1402
1403         WRITE32(OP_DELEGRETURN);
1404         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1405         hdr->nops++;
1406         return 0;
1407
1408 }
1409 /*
1410  * END OF "GENERIC" ENCODE ROUTINES.
1411  */
1412
1413 /*
1414  * Encode an ACCESS request
1415  */
1416 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1417 {
1418         struct xdr_stream xdr;
1419         struct compound_hdr hdr = {
1420                 .nops = 0,
1421         };
1422         int status;
1423
1424         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1425         encode_compound_hdr(&xdr, &hdr);
1426         status = encode_putfh(&xdr, args->fh, &hdr);
1427         if (status != 0)
1428                 goto out;
1429         status = encode_access(&xdr, args->access, &hdr);
1430         if (status != 0)
1431                 goto out;
1432         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1433 out:
1434         encode_nops(&hdr);
1435         return status;
1436 }
1437
1438 /*
1439  * Encode LOOKUP request
1440  */
1441 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1442 {
1443         struct xdr_stream xdr;
1444         struct compound_hdr hdr = {
1445                 .nops = 0,
1446         };
1447         int status;
1448
1449         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1450         encode_compound_hdr(&xdr, &hdr);
1451         if ((status = encode_putfh(&xdr, args->dir_fh, &hdr)) != 0)
1452                 goto out;
1453         if ((status = encode_lookup(&xdr, args->name, &hdr)) != 0)
1454                 goto out;
1455         if ((status = encode_getfh(&xdr, &hdr)) != 0)
1456                 goto out;
1457         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1458 out:
1459         encode_nops(&hdr);
1460         return status;
1461 }
1462
1463 /*
1464  * Encode LOOKUP_ROOT request
1465  */
1466 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1467 {
1468         struct xdr_stream xdr;
1469         struct compound_hdr hdr = {
1470                 .nops = 0,
1471         };
1472         int status;
1473
1474         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1475         encode_compound_hdr(&xdr, &hdr);
1476         if ((status = encode_putrootfh(&xdr, &hdr)) != 0)
1477                 goto out;
1478         if ((status = encode_getfh(&xdr, &hdr)) == 0)
1479                 status = encode_getfattr(&xdr, args->bitmask, &hdr);
1480 out:
1481         encode_nops(&hdr);
1482         return status;
1483 }
1484
1485 /*
1486  * Encode REMOVE request
1487  */
1488 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1489 {
1490         struct xdr_stream xdr;
1491         struct compound_hdr hdr = {
1492                 .nops = 0,
1493         };
1494         int status;
1495
1496         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1497         encode_compound_hdr(&xdr, &hdr);
1498         if ((status = encode_putfh(&xdr, args->fh, &hdr)) != 0)
1499                 goto out;
1500         if ((status = encode_remove(&xdr, &args->name, &hdr)) != 0)
1501                 goto out;
1502         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1503 out:
1504         encode_nops(&hdr);
1505         return status;
1506 }
1507
1508 /*
1509  * Encode RENAME request
1510  */
1511 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1512 {
1513         struct xdr_stream xdr;
1514         struct compound_hdr hdr = {
1515                 .nops = 0,
1516         };
1517         int status;
1518
1519         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1520         encode_compound_hdr(&xdr, &hdr);
1521         if ((status = encode_putfh(&xdr, args->old_dir, &hdr)) != 0)
1522                 goto out;
1523         if ((status = encode_savefh(&xdr, &hdr)) != 0)
1524                 goto out;
1525         if ((status = encode_putfh(&xdr, args->new_dir, &hdr)) != 0)
1526                 goto out;
1527         if ((status = encode_rename(&xdr, args->old_name, args->new_name,
1528                                     &hdr)) != 0)
1529                 goto out;
1530         if ((status = encode_getfattr(&xdr, args->bitmask, &hdr)) != 0)
1531                 goto out;
1532         if ((status = encode_restorefh(&xdr, &hdr)) != 0)
1533                 goto out;
1534         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1535 out:
1536         encode_nops(&hdr);
1537         return status;
1538 }
1539
1540 /*
1541  * Encode LINK request
1542  */
1543 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1544 {
1545         struct xdr_stream xdr;
1546         struct compound_hdr hdr = {
1547                 .nops = 0,
1548         };
1549         int status;
1550
1551         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1552         encode_compound_hdr(&xdr, &hdr);
1553         if ((status = encode_putfh(&xdr, args->fh, &hdr)) != 0)
1554                 goto out;
1555         if ((status = encode_savefh(&xdr, &hdr)) != 0)
1556                 goto out;
1557         if ((status = encode_putfh(&xdr, args->dir_fh, &hdr)) != 0)
1558                 goto out;
1559         if ((status = encode_link(&xdr, args->name, &hdr)) != 0)
1560                 goto out;
1561         if ((status = encode_getfattr(&xdr, args->bitmask, &hdr)) != 0)
1562                 goto out;
1563         if ((status = encode_restorefh(&xdr, &hdr)) != 0)
1564                 goto out;
1565         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1566 out:
1567         encode_nops(&hdr);
1568         return status;
1569 }
1570
1571 /*
1572  * Encode CREATE request
1573  */
1574 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1575 {
1576         struct xdr_stream xdr;
1577         struct compound_hdr hdr = {
1578                 .nops = 0,
1579         };
1580         int status;
1581
1582         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1583         encode_compound_hdr(&xdr, &hdr);
1584         if ((status = encode_putfh(&xdr, args->dir_fh, &hdr)) != 0)
1585                 goto out;
1586         if ((status = encode_savefh(&xdr, &hdr)) != 0)
1587                 goto out;
1588         if ((status = encode_create(&xdr, args, &hdr)) != 0)
1589                 goto out;
1590         if ((status = encode_getfh(&xdr, &hdr)) != 0)
1591                 goto out;
1592         if ((status = encode_getfattr(&xdr, args->bitmask, &hdr)) != 0)
1593                 goto out;
1594         if ((status = encode_restorefh(&xdr, &hdr)) != 0)
1595                 goto out;
1596         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1597 out:
1598         encode_nops(&hdr);
1599         return status;
1600 }
1601
1602 /*
1603  * Encode SYMLINK request
1604  */
1605 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1606 {
1607         return nfs4_xdr_enc_create(req, p, args);
1608 }
1609
1610 /*
1611  * Encode GETATTR request
1612  */
1613 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1614 {
1615         struct xdr_stream xdr;
1616         struct compound_hdr hdr = {
1617                 .nops = 0,
1618         };
1619         int status;
1620
1621         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1622         encode_compound_hdr(&xdr, &hdr);
1623         if ((status = encode_putfh(&xdr, args->fh, &hdr)) == 0)
1624                 status = encode_getfattr(&xdr, args->bitmask, &hdr);
1625         encode_nops(&hdr);
1626         return status;
1627 }
1628
1629 /*
1630  * Encode a CLOSE request
1631  */
1632 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1633 {
1634         struct xdr_stream xdr;
1635         struct compound_hdr hdr = {
1636                 .nops   = 0,
1637         };
1638         int status;
1639
1640         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1641         encode_compound_hdr(&xdr, &hdr);
1642         status = encode_putfh(&xdr, args->fh, &hdr);
1643         if(status)
1644                 goto out;
1645         status = encode_close(&xdr, args, &hdr);
1646         if (status != 0)
1647                 goto out;
1648         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1649 out:
1650         encode_nops(&hdr);
1651         return status;
1652 }
1653
1654 /*
1655  * Encode an OPEN request
1656  */
1657 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1658 {
1659         struct xdr_stream xdr;
1660         struct compound_hdr hdr = {
1661                 .nops = 0,
1662         };
1663         int status;
1664
1665         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1666         encode_compound_hdr(&xdr, &hdr);
1667         status = encode_putfh(&xdr, args->fh, &hdr);
1668         if (status)
1669                 goto out;
1670         status = encode_savefh(&xdr, &hdr);
1671         if (status)
1672                 goto out;
1673         status = encode_open(&xdr, args, &hdr);
1674         if (status)
1675                 goto out;
1676         status = encode_getfh(&xdr, &hdr);
1677         if (status)
1678                 goto out;
1679         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1680         if (status)
1681                 goto out;
1682         status = encode_restorefh(&xdr, &hdr);
1683         if (status)
1684                 goto out;
1685         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1686 out:
1687         encode_nops(&hdr);
1688         return status;
1689 }
1690
1691 /*
1692  * Encode an OPEN_CONFIRM request
1693  */
1694 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1695 {
1696         struct xdr_stream xdr;
1697         struct compound_hdr hdr = {
1698                 .nops   = 0,
1699         };
1700         int status;
1701
1702         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703         encode_compound_hdr(&xdr, &hdr);
1704         status = encode_putfh(&xdr, args->fh, &hdr);
1705         if(status)
1706                 goto out;
1707         status = encode_open_confirm(&xdr, args, &hdr);
1708 out:
1709         encode_nops(&hdr);
1710         return status;
1711 }
1712
1713 /*
1714  * Encode an OPEN request with no attributes.
1715  */
1716 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1717 {
1718         struct xdr_stream xdr;
1719         struct compound_hdr hdr = {
1720                 .nops   = 0,
1721         };
1722         int status;
1723
1724         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1725         encode_compound_hdr(&xdr, &hdr);
1726         status = encode_putfh(&xdr, args->fh, &hdr);
1727         if (status)
1728                 goto out;
1729         status = encode_open(&xdr, args, &hdr);
1730         if (status)
1731                 goto out;
1732         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1733 out:
1734         encode_nops(&hdr);
1735         return status;
1736 }
1737
1738 /*
1739  * Encode an OPEN_DOWNGRADE request
1740  */
1741 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1742 {
1743         struct xdr_stream xdr;
1744         struct compound_hdr hdr = {
1745                 .nops   = 0,
1746         };
1747         int status;
1748
1749         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1750         encode_compound_hdr(&xdr, &hdr);
1751         status = encode_putfh(&xdr, args->fh, &hdr);
1752         if (status)
1753                 goto out;
1754         status = encode_open_downgrade(&xdr, args, &hdr);
1755         if (status != 0)
1756                 goto out;
1757         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1758 out:
1759         encode_nops(&hdr);
1760         return status;
1761 }
1762
1763 /*
1764  * Encode a LOCK request
1765  */
1766 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1767 {
1768         struct xdr_stream xdr;
1769         struct compound_hdr hdr = {
1770                 .nops   = 0,
1771         };
1772         int status;
1773
1774         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1775         encode_compound_hdr(&xdr, &hdr);
1776         status = encode_putfh(&xdr, args->fh, &hdr);
1777         if(status)
1778                 goto out;
1779         status = encode_lock(&xdr, args, &hdr);
1780 out:
1781         encode_nops(&hdr);
1782         return status;
1783 }
1784
1785 /*
1786  * Encode a LOCKT request
1787  */
1788 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1789 {
1790         struct xdr_stream xdr;
1791         struct compound_hdr hdr = {
1792                 .nops   = 0,
1793         };
1794         int status;
1795
1796         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1797         encode_compound_hdr(&xdr, &hdr);
1798         status = encode_putfh(&xdr, args->fh, &hdr);
1799         if(status)
1800                 goto out;
1801         status = encode_lockt(&xdr, args, &hdr);
1802 out:
1803         encode_nops(&hdr);
1804         return status;
1805 }
1806
1807 /*
1808  * Encode a LOCKU request
1809  */
1810 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1811 {
1812         struct xdr_stream xdr;
1813         struct compound_hdr hdr = {
1814                 .nops   = 0,
1815         };
1816         int status;
1817
1818         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1819         encode_compound_hdr(&xdr, &hdr);
1820         status = encode_putfh(&xdr, args->fh, &hdr);
1821         if(status)
1822                 goto out;
1823         status = encode_locku(&xdr, args, &hdr);
1824 out:
1825         encode_nops(&hdr);
1826         return status;
1827 }
1828
1829 /*
1830  * Encode a READLINK request
1831  */
1832 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1833 {
1834         struct xdr_stream xdr;
1835         struct compound_hdr hdr = {
1836                 .nops = 0,
1837         };
1838         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1839         unsigned int replen;
1840         int status;
1841
1842         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1843         encode_compound_hdr(&xdr, &hdr);
1844         status = encode_putfh(&xdr, args->fh, &hdr);
1845         if(status)
1846                 goto out;
1847         status = encode_readlink(&xdr, args, req, &hdr);
1848
1849         /* set up reply kvec
1850          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1851          *      + OP_READLINK + status + string length = 8
1852          */
1853         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1854         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1855                         args->pgbase, args->pglen);
1856
1857 out:
1858         encode_nops(&hdr);
1859         return status;
1860 }
1861
1862 /*
1863  * Encode a READDIR request
1864  */
1865 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1866 {
1867         struct xdr_stream xdr;
1868         struct compound_hdr hdr = {
1869                 .nops = 0,
1870         };
1871         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1872         int replen;
1873         int status;
1874
1875         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1876         encode_compound_hdr(&xdr, &hdr);
1877         status = encode_putfh(&xdr, args->fh, &hdr);
1878         if(status)
1879                 goto out;
1880         status = encode_readdir(&xdr, args, req, &hdr);
1881
1882         /* set up reply kvec
1883          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1884          *      + OP_READDIR + status + verifer(2)  = 9
1885          */
1886         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1887         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1888                          args->pgbase, args->count);
1889         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1890                         __func__, replen, args->pages,
1891                         args->pgbase, args->count);
1892
1893 out:
1894         encode_nops(&hdr);
1895         return status;
1896 }
1897
1898 /*
1899  * Encode a READ request
1900  */
1901 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1902 {
1903         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1904         struct xdr_stream xdr;
1905         struct compound_hdr hdr = {
1906                 .nops = 0,
1907         };
1908         int replen, status;
1909
1910         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911         encode_compound_hdr(&xdr, &hdr);
1912         status = encode_putfh(&xdr, args->fh, &hdr);
1913         if (status)
1914                 goto out;
1915         status = encode_read(&xdr, args, &hdr);
1916         if (status)
1917                 goto out;
1918
1919         /* set up reply kvec
1920          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1921          *       + OP_READ + status + eof + datalen = 9
1922          */
1923         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1924         xdr_inline_pages(&req->rq_rcv_buf, replen,
1925                          args->pages, args->pgbase, args->count);
1926         req->rq_rcv_buf.flags |= XDRBUF_READ;
1927 out:
1928         encode_nops(&hdr);
1929         return status;
1930 }
1931
1932 /*
1933  * Encode an SETATTR request
1934  */
1935 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1936 {
1937         struct xdr_stream xdr;
1938         struct compound_hdr hdr = {
1939                 .nops   = 0,
1940         };
1941         int status;
1942
1943         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1944         encode_compound_hdr(&xdr, &hdr);
1945         status = encode_putfh(&xdr, args->fh, &hdr);
1946         if(status)
1947                 goto out;
1948         status = encode_setattr(&xdr, args, args->server, &hdr);
1949         if(status)
1950                 goto out;
1951         status = encode_getfattr(&xdr, args->bitmask, &hdr);
1952 out:
1953         encode_nops(&hdr);
1954         return status;
1955 }
1956
1957 /*
1958  * Encode a GETACL request
1959  */
1960 static int
1961 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1962                 struct nfs_getaclargs *args)
1963 {
1964         struct xdr_stream xdr;
1965         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1966         struct compound_hdr hdr = {
1967                 .nops   = 0,
1968         };
1969         int replen, status;
1970
1971         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1972         encode_compound_hdr(&xdr, &hdr);
1973         status = encode_putfh(&xdr, args->fh, &hdr);
1974         if (status)
1975                 goto out;
1976         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1977         /* set up reply buffer: */
1978         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1979         xdr_inline_pages(&req->rq_rcv_buf, replen,
1980                 args->acl_pages, args->acl_pgbase, args->acl_len);
1981 out:
1982         encode_nops(&hdr);
1983         return status;
1984 }
1985
1986 /*
1987  * Encode a WRITE request
1988  */
1989 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1990 {
1991         struct xdr_stream xdr;
1992         struct compound_hdr hdr = {
1993                 .nops = 0,
1994         };
1995         int status;
1996
1997         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1998         encode_compound_hdr(&xdr, &hdr);
1999         status = encode_putfh(&xdr, args->fh, &hdr);
2000         if (status)
2001                 goto out;
2002         status = encode_write(&xdr, args, &hdr);
2003         if (status)
2004                 goto out;
2005         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2006         status = encode_getfattr(&xdr, args->bitmask, &hdr);
2007 out:
2008         encode_nops(&hdr);
2009         return status;
2010 }
2011
2012 /*
2013  *  a COMMIT request
2014  */
2015 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2016 {
2017         struct xdr_stream xdr;
2018         struct compound_hdr hdr = {
2019                 .nops = 0,
2020         };
2021         int status;
2022
2023         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2024         encode_compound_hdr(&xdr, &hdr);
2025         status = encode_putfh(&xdr, args->fh, &hdr);
2026         if (status)
2027                 goto out;
2028         status = encode_commit(&xdr, args, &hdr);
2029         if (status)
2030                 goto out;
2031         status = encode_getfattr(&xdr, args->bitmask, &hdr);
2032 out:
2033         encode_nops(&hdr);
2034         return status;
2035 }
2036
2037 /*
2038  * FSINFO request
2039  */
2040 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2041 {
2042         struct xdr_stream xdr;
2043         struct compound_hdr hdr = {
2044                 .nops   = 0,
2045         };
2046         int status;
2047
2048         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2049         encode_compound_hdr(&xdr, &hdr);
2050         status = encode_putfh(&xdr, args->fh, &hdr);
2051         if (!status)
2052                 status = encode_fsinfo(&xdr, args->bitmask, &hdr);
2053         encode_nops(&hdr);
2054         return status;
2055 }
2056
2057 /*
2058  * a PATHCONF request
2059  */
2060 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2061 {
2062         struct xdr_stream xdr;
2063         struct compound_hdr hdr = {
2064                 .nops = 0,
2065         };
2066         int status;
2067
2068         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2069         encode_compound_hdr(&xdr, &hdr);
2070         status = encode_putfh(&xdr, args->fh, &hdr);
2071         if (!status)
2072                 status = encode_getattr_one(&xdr,
2073                                 args->bitmask[0] & nfs4_pathconf_bitmap[0],
2074                                 &hdr);
2075         encode_nops(&hdr);
2076         return status;
2077 }
2078
2079 /*
2080  * a STATFS request
2081  */
2082 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2083 {
2084         struct xdr_stream xdr;
2085         struct compound_hdr hdr = {
2086                 .nops = 0,
2087         };
2088         int status;
2089
2090         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2091         encode_compound_hdr(&xdr, &hdr);
2092         status = encode_putfh(&xdr, args->fh, &hdr);
2093         if (status == 0)
2094                 status = encode_getattr_two(&xdr,
2095                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2096                                 args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2097         encode_nops(&hdr);
2098         return status;
2099 }
2100
2101 /*
2102  * GETATTR_BITMAP request
2103  */
2104 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2105 {
2106         struct xdr_stream xdr;
2107         struct compound_hdr hdr = {
2108                 .nops = 0,
2109         };
2110         int status;
2111
2112         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2113         encode_compound_hdr(&xdr, &hdr);
2114         status = encode_putfh(&xdr, fhandle, &hdr);
2115         if (status == 0)
2116                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2117                                 FATTR4_WORD0_LINK_SUPPORT|
2118                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2119                                 FATTR4_WORD0_ACLSUPPORT, &hdr);
2120         encode_nops(&hdr);
2121         return status;
2122 }
2123
2124 /*
2125  * a RENEW request
2126  */
2127 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2128 {
2129         struct xdr_stream xdr;
2130         struct compound_hdr hdr = {
2131                 .nops   = 0,
2132         };
2133         int status;
2134
2135         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2136         encode_compound_hdr(&xdr, &hdr);
2137         status = encode_renew(&xdr, clp, &hdr);
2138         encode_nops(&hdr);
2139         return status;
2140 }
2141
2142 /*
2143  * a SETCLIENTID request
2144  */
2145 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2146 {
2147         struct xdr_stream xdr;
2148         struct compound_hdr hdr = {
2149                 .nops   = 0,
2150         };
2151         int status;
2152
2153         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2154         encode_compound_hdr(&xdr, &hdr);
2155         status = encode_setclientid(&xdr, sc, &hdr);
2156         encode_nops(&hdr);
2157         return status;
2158 }
2159
2160 /*
2161  * a SETCLIENTID_CONFIRM request
2162  */
2163 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2164 {
2165         struct xdr_stream xdr;
2166         struct compound_hdr hdr = {
2167                 .nops   = 0,
2168         };
2169         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2170         int status;
2171
2172         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2173         encode_compound_hdr(&xdr, &hdr);
2174         status = encode_setclientid_confirm(&xdr, clp, &hdr);
2175         if (!status)
2176                 status = encode_putrootfh(&xdr, &hdr);
2177         if (!status)
2178                 status = encode_fsinfo(&xdr, lease_bitmap, &hdr);
2179         encode_nops(&hdr);
2180         return status;
2181 }
2182
2183 /*
2184  * DELEGRETURN request
2185  */
2186 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2187 {
2188         struct xdr_stream xdr;
2189         struct compound_hdr hdr = {
2190                 .nops = 0,
2191         };
2192         int status;
2193
2194         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2195         encode_compound_hdr(&xdr, &hdr);
2196         status = encode_putfh(&xdr, args->fhandle, &hdr);
2197         if (status != 0)
2198                 goto out;
2199         status = encode_delegreturn(&xdr, args->stateid, &hdr);
2200         if (status != 0)
2201                 goto out;
2202         status = encode_getfattr(&xdr, args->bitmask, &hdr);
2203 out:
2204         encode_nops(&hdr);
2205         return status;
2206 }
2207
2208 /*
2209  * Encode FS_LOCATIONS request
2210  */
2211 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2212 {
2213         struct xdr_stream xdr;
2214         struct compound_hdr hdr = {
2215                 .nops = 0,
2216         };
2217         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2218         int replen;
2219         int status;
2220
2221         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2222         encode_compound_hdr(&xdr, &hdr);
2223         if ((status = encode_putfh(&xdr, args->dir_fh, &hdr)) != 0)
2224                 goto out;
2225         if ((status = encode_lookup(&xdr, args->name, &hdr)) != 0)
2226                 goto out;
2227         if ((status = encode_fs_locations(&xdr, args->bitmask, &hdr)) != 0)
2228                 goto out;
2229         /* set up reply
2230          *   toplevel_status + OP_PUTFH + status
2231          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2232          */
2233         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2234         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2235                         0, PAGE_SIZE);
2236 out:
2237         encode_nops(&hdr);
2238         return status;
2239 }
2240
2241 /*
2242  * START OF "GENERIC" DECODE ROUTINES.
2243  *   These may look a little ugly since they are imported from a "generic"
2244  * set of XDR encode/decode routines which are intended to be shared by
2245  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2246  *
2247  * If the pain of reading these is too great, it should be a straightforward
2248  * task to translate them into Linux-specific versions which are more
2249  * consistent with the style used in NFSv2/v3...
2250  */
2251 #define READ32(x)         (x) = ntohl(*p++)
2252 #define READ64(x)         do {                  \
2253         (x) = (u64)ntohl(*p++) << 32;           \
2254         (x) |= ntohl(*p++);                     \
2255 } while (0)
2256 #define READTIME(x)       do {                  \
2257         p++;                                    \
2258         (x.tv_sec) = ntohl(*p++);               \
2259         (x.tv_nsec) = ntohl(*p++);              \
2260 } while (0)
2261 #define COPYMEM(x,nbytes) do {                  \
2262         memcpy((x), p, nbytes);                 \
2263         p += XDR_QUADLEN(nbytes);               \
2264 } while (0)
2265
2266 #define READ_BUF(nbytes)  do { \
2267         p = xdr_inline_decode(xdr, nbytes); \
2268         if (unlikely(!p)) { \
2269                 dprintk("nfs: %s: prematurely hit end of receive" \
2270                                 " buffer\n", __func__); \
2271                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2272                                 __func__, xdr->p, nbytes, xdr->end); \
2273                 return -EIO; \
2274         } \
2275 } while (0)
2276
2277 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2278 {
2279         __be32 *p;
2280
2281         READ_BUF(4);
2282         READ32(*len);
2283         READ_BUF(*len);
2284         *string = (char *)p;
2285         return 0;
2286 }
2287
2288 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2289 {
2290         __be32 *p;
2291
2292         READ_BUF(8);
2293         READ32(hdr->status);
2294         READ32(hdr->taglen);
2295
2296         READ_BUF(hdr->taglen + 4);
2297         hdr->tag = (char *)p;
2298         p += XDR_QUADLEN(hdr->taglen);
2299         READ32(hdr->nops);
2300         if (unlikely(hdr->nops < 1))
2301                 return nfs4_stat_to_errno(hdr->status);
2302         return 0;
2303 }
2304
2305 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2306 {
2307         __be32 *p;
2308         uint32_t opnum;
2309         int32_t nfserr;
2310
2311         READ_BUF(8);
2312         READ32(opnum);
2313         if (opnum != expected) {
2314                 dprintk("nfs: Server returned operation"
2315                         " %d but we issued a request for %d\n",
2316                                 opnum, expected);
2317                 return -EIO;
2318         }
2319         READ32(nfserr);
2320         if (nfserr != NFS_OK)
2321                 return nfs4_stat_to_errno(nfserr);
2322         return 0;
2323 }
2324
2325 /* Dummy routine */
2326 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2327 {
2328         __be32 *p;
2329         unsigned int strlen;
2330         char *str;
2331
2332         READ_BUF(12);
2333         return decode_opaque_inline(xdr, &strlen, &str);
2334 }
2335
2336 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2337 {
2338         uint32_t bmlen;
2339         __be32 *p;
2340
2341         READ_BUF(4);
2342         READ32(bmlen);
2343
2344         bitmap[0] = bitmap[1] = 0;
2345         READ_BUF((bmlen << 2));
2346         if (bmlen > 0) {
2347                 READ32(bitmap[0]);
2348                 if (bmlen > 1)
2349                         READ32(bitmap[1]);
2350         }
2351         return 0;
2352 }
2353
2354 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2355 {
2356         __be32 *p;
2357
2358         READ_BUF(4);
2359         READ32(*attrlen);
2360         *savep = xdr->p;
2361         return 0;
2362 }
2363
2364 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2365 {
2366         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2367                 decode_attr_bitmap(xdr, bitmask);
2368                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2369         } else
2370                 bitmask[0] = bitmask[1] = 0;
2371         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2372         return 0;
2373 }
2374
2375 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2376 {
2377         __be32 *p;
2378
2379         *type = 0;
2380         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2381                 return -EIO;
2382         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2383                 READ_BUF(4);
2384                 READ32(*type);
2385                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2386                         dprintk("%s: bad type %d\n", __func__, *type);
2387                         return -EIO;
2388                 }
2389                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2390         }
2391         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type].nfs2type);
2392         return 0;
2393 }
2394
2395 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2396 {
2397         __be32 *p;
2398
2399         *change = 0;
2400         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2401                 return -EIO;
2402         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2403                 READ_BUF(8);
2404                 READ64(*change);
2405                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2406         }
2407         dprintk("%s: change attribute=%Lu\n", __func__,
2408                         (unsigned long long)*change);
2409         return 0;
2410 }
2411
2412 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2413 {
2414         __be32 *p;
2415
2416         *size = 0;
2417         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2418                 return -EIO;
2419         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2420                 READ_BUF(8);
2421                 READ64(*size);
2422                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2423         }
2424         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2425         return 0;
2426 }
2427
2428 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2429 {
2430         __be32 *p;
2431
2432         *res = 0;
2433         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2434                 return -EIO;
2435         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2436                 READ_BUF(4);
2437                 READ32(*res);
2438                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2439         }
2440         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2441         return 0;
2442 }
2443
2444 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2445 {
2446         __be32 *p;
2447
2448         *res = 0;
2449         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2450                 return -EIO;
2451         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2452                 READ_BUF(4);
2453                 READ32(*res);
2454                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2455         }
2456         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2457         return 0;
2458 }
2459
2460 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2461 {
2462         __be32 *p;
2463
2464         fsid->major = 0;
2465         fsid->minor = 0;
2466         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2467                 return -EIO;
2468         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2469                 READ_BUF(16);
2470                 READ64(fsid->major);
2471                 READ64(fsid->minor);
2472                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2473         }
2474         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2475                         (unsigned long long)fsid->major,
2476                         (unsigned long long)fsid->minor);
2477         return 0;
2478 }
2479
2480 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2481 {
2482         __be32 *p;
2483
2484         *res = 60;
2485         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2486                 return -EIO;
2487         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2488                 READ_BUF(4);
2489                 READ32(*res);
2490                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2491         }
2492         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2493         return 0;
2494 }
2495
2496 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2497 {
2498         __be32 *p;
2499
2500         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2501         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2502                 return -EIO;
2503         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2504                 READ_BUF(4);
2505                 READ32(*res);
2506                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2507         }
2508         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2509         return 0;
2510 }
2511
2512 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2513 {
2514         __be32 *p;
2515
2516         *fileid = 0;
2517         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2518                 return -EIO;
2519         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2520                 READ_BUF(8);
2521                 READ64(*fileid);
2522                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2523         }
2524         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2525         return 0;
2526 }
2527
2528 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2529 {
2530         __be32 *p;
2531
2532         *fileid = 0;
2533         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2534                 return -EIO;
2535         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2536                 READ_BUF(8);
2537                 READ64(*fileid);
2538                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2539         }
2540         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2541         return 0;
2542 }
2543
2544 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2545 {
2546         __be32 *p;
2547         int status = 0;
2548
2549         *res = 0;
2550         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2551                 return -EIO;
2552         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2553                 READ_BUF(8);
2554                 READ64(*res);
2555                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2556         }
2557         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2558         return status;
2559 }
2560
2561 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2562 {
2563         __be32 *p;
2564         int status = 0;
2565
2566         *res = 0;
2567         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2568                 return -EIO;
2569         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2570                 READ_BUF(8);
2571                 READ64(*res);
2572                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2573         }
2574         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2575         return status;
2576 }
2577
2578 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2579 {
2580         __be32 *p;
2581         int status = 0;
2582
2583         *res = 0;
2584         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2585                 return -EIO;
2586         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2587                 READ_BUF(8);
2588                 READ64(*res);
2589                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2590         }
2591         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2592         return status;
2593 }
2594
2595 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2596 {
2597         u32 n;
2598         __be32 *p;
2599         int status = 0;
2600
2601         READ_BUF(4);
2602         READ32(n);
2603         if (n == 0)
2604                 goto root_path;
2605         dprintk("path ");
2606         path->ncomponents = 0;
2607         while (path->ncomponents < n) {
2608                 struct nfs4_string *component = &path->components[path->ncomponents];
2609                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2610                 if (unlikely(status != 0))
2611                         goto out_eio;
2612                 if (path->ncomponents != n)
2613                         dprintk("/");
2614                 dprintk("%s", component->data);
2615                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2616                         path->ncomponents++;
2617                 else {
2618                         dprintk("cannot parse %d components in path\n", n);
2619                         goto out_eio;
2620                 }
2621         }
2622 out:
2623         dprintk("\n");
2624         return status;
2625 root_path:
2626 /* a root pathname is sent as a zero component4 */
2627         path->ncomponents = 1;
2628         path->components[0].len=0;
2629         path->components[0].data=NULL;
2630         dprintk("path /\n");
2631         goto out;
2632 out_eio:
2633         dprintk(" status %d", status);
2634         status = -EIO;
2635         goto out;
2636 }
2637
2638 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2639 {
2640         int n;
2641         __be32 *p;
2642         int status = -EIO;
2643
2644         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2645                 goto out;
2646         status = 0;
2647         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2648                 goto out;
2649         dprintk("%s: fsroot ", __func__);
2650         status = decode_pathname(xdr, &res->fs_path);
2651         if (unlikely(status != 0))
2652                 goto out;
2653         READ_BUF(4);
2654         READ32(n);
2655         if (n <= 0)
2656                 goto out_eio;
2657         res->nlocations = 0;
2658         while (res->nlocations < n) {
2659                 u32 m;
2660                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2661
2662                 READ_BUF(4);
2663                 READ32(m);
2664
2665                 loc->nservers = 0;
2666                 dprintk("%s: servers ", __func__);
2667                 while (loc->nservers < m) {
2668                         struct nfs4_string *server = &loc->servers[loc->nservers];
2669                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2670                         if (unlikely(status != 0))
2671                                 goto out_eio;
2672                         dprintk("%s ", server->data);
2673                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2674                                 loc->nservers++;
2675                         else {
2676                                 unsigned int i;
2677                                 dprintk("%s: using first %u of %u servers "
2678                                         "returned for location %u\n",
2679                                                 __func__,
2680                                                 NFS4_FS_LOCATION_MAXSERVERS,
2681                                                 m, res->nlocations);
2682                                 for (i = loc->nservers; i < m; i++) {
2683                                         unsigned int len;
2684                                         char *data;
2685                                         status = decode_opaque_inline(xdr, &len, &data);
2686                                         if (unlikely(status != 0))
2687                                                 goto out_eio;
2688                                 }
2689                         }
2690                 }
2691                 status = decode_pathname(xdr, &loc->rootpath);
2692                 if (unlikely(status != 0))
2693                         goto out_eio;
2694                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2695                         res->nlocations++;
2696         }
2697 out:
2698         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2699         return status;
2700 out_eio:
2701         status = -EIO;
2702         goto out;
2703 }
2704
2705 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2706 {
2707         __be32 *p;
2708         int status = 0;
2709
2710         *res = 0;
2711         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2712                 return -EIO;
2713         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2714                 READ_BUF(8);
2715                 READ64(*res);
2716                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2717         }
2718         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2719         return status;
2720 }
2721
2722 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2723 {
2724         __be32 *p;
2725         int status = 0;
2726
2727         *maxlink = 1;
2728         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2729                 return -EIO;
2730         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2731                 READ_BUF(4);
2732                 READ32(*maxlink);
2733                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2734         }
2735         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2736         return status;
2737 }
2738
2739 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2740 {
2741         __be32 *p;
2742         int status = 0;
2743
2744         *maxname = 1024;
2745         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2746                 return -EIO;
2747         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2748                 READ_BUF(4);
2749                 READ32(*maxname);
2750                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2751         }
2752         dprintk("%s: maxname=%u\n", __func__, *maxname);
2753         return status;
2754 }
2755
2756 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2757 {
2758         __be32 *p;
2759         int status = 0;
2760
2761         *res = 1024;
2762         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2763                 return -EIO;
2764         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2765                 uint64_t maxread;
2766                 READ_BUF(8);
2767                 READ64(maxread);
2768                 if (maxread > 0x7FFFFFFF)
2769                         maxread = 0x7FFFFFFF;
2770                 *res = (uint32_t)maxread;
2771                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2772         }
2773         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2774         return status;
2775 }
2776
2777 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2778 {
2779         __be32 *p;
2780         int status = 0;
2781
2782         *res = 1024;
2783         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2784                 return -EIO;
2785         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2786                 uint64_t maxwrite;
2787                 READ_BUF(8);
2788                 READ64(maxwrite);
2789                 if (maxwrite > 0x7FFFFFFF)
2790                         maxwrite = 0x7FFFFFFF;
2791                 *res = (uint32_t)maxwrite;
2792                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2793         }
2794         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2795         return status;
2796 }
2797
2798 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2799 {
2800         __be32 *p;
2801
2802         *mode = 0;
2803         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2804                 return -EIO;
2805         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2806                 READ_BUF(4);
2807                 READ32(*mode);
2808                 *mode &= ~S_IFMT;
2809                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2810         }
2811         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2812         return 0;
2813 }
2814
2815 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2816 {
2817         __be32 *p;
2818
2819         *nlink = 1;
2820         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2821                 return -EIO;
2822         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2823                 READ_BUF(4);
2824                 READ32(*nlink);
2825                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2826         }
2827         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2828         return 0;
2829 }
2830
2831 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2832 {
2833         uint32_t len;
2834         __be32 *p;
2835
2836         *uid = -2;
2837         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2838                 return -EIO;
2839         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2840                 READ_BUF(4);
2841                 READ32(len);
2842                 READ_BUF(len);
2843                 if (len < XDR_MAX_NETOBJ) {
2844                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2845                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2846                                                 __func__);
2847                 } else
2848                         dprintk("%s: name too long (%u)!\n",
2849                                         __func__, len);
2850                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2851         }
2852         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2853         return 0;
2854 }
2855
2856 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2857 {
2858         uint32_t len;
2859         __be32 *p;
2860
2861         *gid = -2;
2862         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2863                 return -EIO;
2864         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2865                 READ_BUF(4);
2866                 READ32(len);
2867                 READ_BUF(len);
2868                 if (len < XDR_MAX_NETOBJ) {
2869                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2870                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2871                                                 __func__);
2872                 } else
2873                         dprintk("%s: name too long (%u)!\n",
2874                                         __func__, len);
2875                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2876         }
2877         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2878         return 0;
2879 }
2880
2881 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2882 {
2883         uint32_t major = 0, minor = 0;
2884         __be32 *p;
2885
2886         *rdev = MKDEV(0,0);
2887         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2888                 return -EIO;
2889         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2890                 dev_t tmp;
2891
2892                 READ_BUF(8);
2893                 READ32(major);
2894                 READ32(minor);
2895                 tmp = MKDEV(major, minor);
2896                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2897                         *rdev = tmp;
2898                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2899         }
2900         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2901         return 0;
2902 }
2903
2904 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2905 {
2906         __be32 *p;
2907         int status = 0;
2908
2909         *res = 0;
2910         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2911                 return -EIO;
2912         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2913                 READ_BUF(8);
2914                 READ64(*res);
2915                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2916         }
2917         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2918         return status;
2919 }
2920
2921 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2922 {
2923         __be32 *p;
2924         int status = 0;
2925
2926         *res = 0;
2927         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2928                 return -EIO;
2929         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2930                 READ_BUF(8);
2931                 READ64(*res);
2932                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2933         }
2934         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2935         return status;
2936 }
2937
2938 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2939 {
2940         __be32 *p;
2941         int status = 0;
2942
2943         *res = 0;
2944         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2945                 return -EIO;
2946         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2947                 READ_BUF(8);
2948                 READ64(*res);
2949                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2950         }
2951         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2952         return status;
2953 }
2954
2955 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2956 {
2957         __be32 *p;
2958
2959         *used = 0;
2960         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2961                 return -EIO;
2962         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2963                 READ_BUF(8);
2964                 READ64(*used);
2965                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2966         }
2967         dprintk("%s: space used=%Lu\n", __func__,
2968                         (unsigned long long)*used);
2969         return 0;
2970 }
2971
2972 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2973 {
2974         __be32 *p;
2975         uint64_t sec;
2976         uint32_t nsec;
2977
2978         READ_BUF(12);
2979         READ64(sec);
2980         READ32(nsec);
2981         time->tv_sec = (time_t)sec;
2982         time->tv_nsec = (long)nsec;
2983         return 0;
2984 }
2985
2986 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2987 {
2988         int status = 0;
2989
2990         time->tv_sec = 0;
2991         time->tv_nsec = 0;
2992         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2993                 return -EIO;
2994         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2995                 status = decode_attr_time(xdr, time);
2996                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2997         }
2998         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2999         return status;
3000 }
3001
3002 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3003 {
3004         int status = 0;
3005
3006         time->tv_sec = 0;
3007         time->tv_nsec = 0;
3008         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3009                 return -EIO;
3010         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3011                 status = decode_attr_time(xdr, time);
3012                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3013         }
3014         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3015         return status;
3016 }
3017
3018 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3019 {
3020         int status = 0;
3021
3022         time->tv_sec = 0;
3023         time->tv_nsec = 0;
3024         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3025                 return -EIO;
3026         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3027                 status = decode_attr_time(xdr, time);
3028                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3029         }
3030         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3031         return status;
3032 }
3033
3034 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3035 {
3036         unsigned int attrwords = XDR_QUADLEN(attrlen);
3037         unsigned int nwords = xdr->p - savep;
3038
3039         if (unlikely(attrwords != nwords)) {
3040                 dprintk("%s: server returned incorrect attribute length: "
3041                         "%u %c %u\n",
3042                                 __func__,
3043                                 attrwords << 2,
3044                                 (attrwords < nwords) ? '<' : '>',
3045                                 nwords << 2);
3046                 return -EIO;
3047         }
3048         return 0;
3049 }
3050
3051 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3052 {
3053         __be32 *p;
3054
3055         READ_BUF(20);
3056         READ32(cinfo->atomic);
3057         READ64(cinfo->before);
3058         READ64(cinfo->after);
3059         return 0;
3060 }
3061
3062 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3063 {
3064         __be32 *p;
3065         uint32_t supp, acc;
3066         int status;
3067
3068         status = decode_op_hdr(xdr, OP_ACCESS);
3069         if (status)
3070                 return status;
3071         READ_BUF(8);
3072         READ32(supp);
3073         READ32(acc);
3074         access->supported = supp;
3075         access->access = acc;
3076         return 0;
3077 }
3078
3079 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3080 {
3081         __be32 *p;
3082         int status;
3083
3084         status = decode_op_hdr(xdr, OP_CLOSE);
3085         if (status != -EIO)
3086                 nfs_increment_open_seqid(status, res->seqid);
3087         if (status)
3088                 return status;
3089         READ_BUF(NFS4_STATEID_SIZE);
3090         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3091         return 0;
3092 }
3093
3094 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3095 {
3096         __be32 *p;
3097         int status;
3098
3099         status = decode_op_hdr(xdr, OP_COMMIT);
3100         if (status)
3101                 return status;
3102         READ_BUF(8);
3103         COPYMEM(res->verf->verifier, 8);
3104         return 0;
3105 }
3106
3107 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3108 {
3109         __be32 *p;
3110         uint32_t bmlen;
3111         int status;
3112
3113         status = decode_op_hdr(xdr, OP_CREATE);
3114         if (status)
3115                 return status;
3116         if ((status = decode_change_info(xdr, cinfo)))
3117                 return status;
3118         READ_BUF(4);
3119         READ32(bmlen);
3120         READ_BUF(bmlen << 2);
3121         return 0;
3122 }
3123
3124 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3125 {
3126         __be32 *savep;
3127         uint32_t attrlen, bitmap[2] = {0};
3128         int status;
3129
3130         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3131                 goto xdr_error;
3132         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3133                 goto xdr_error;
3134         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3135                 goto xdr_error;
3136         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3137                 goto xdr_error;
3138         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3139                 goto xdr_error;
3140         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3141                 goto xdr_error;
3142         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3143                 goto xdr_error;
3144         status = verify_attr_len(xdr, savep, attrlen);
3145 xdr_error:
3146         dprintk("%s: xdr returned %d!\n", __func__, -status);
3147         return status;
3148 }
3149
3150 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3151 {
3152         __be32 *savep;
3153         uint32_t attrlen, bitmap[2] = {0};
3154         int status;
3155
3156         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3157                 goto xdr_error;
3158         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3159                 goto xdr_error;
3160         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3161                 goto xdr_error;
3162
3163         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3164                 goto xdr_error;
3165         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3166                 goto xdr_error;
3167         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3168                 goto xdr_error;
3169         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3170                 goto xdr_error;
3171         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3172                 goto xdr_error;
3173         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3174                 goto xdr_error;
3175
3176         status = verify_attr_len(xdr, savep, attrlen);
3177 xdr_error:
3178         dprintk("%s: xdr returned %d!\n", __func__, -status);
3179         return status;
3180 }
3181
3182 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3183 {
3184         __be32 *savep;
3185         uint32_t attrlen, bitmap[2] = {0};
3186         int status;
3187
3188         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3189                 goto xdr_error;
3190         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3191                 goto xdr_error;
3192         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3193                 goto xdr_error;
3194
3195         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3196                 goto xdr_error;
3197         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3198                 goto xdr_error;
3199
3200         status = verify_attr_len(xdr, savep, attrlen);
3201 xdr_error:
3202         dprintk("%s: xdr returned %d!\n", __func__, -status);
3203         return status;
3204 }
3205
3206 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3207 {
3208         __be32 *savep;
3209         uint32_t attrlen,
3210                  bitmap[2] = {0},
3211                  type;
3212         int status, fmode = 0;
3213         uint64_t fileid;
3214
3215         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3216                 goto xdr_error;
3217         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3218                 goto xdr_error;
3219
3220         fattr->bitmap[0] = bitmap[0];
3221         fattr->bitmap[1] = bitmap[1];
3222
3223         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3224                 goto xdr_error;
3225
3226
3227         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3228                 goto xdr_error;
3229         fattr->type = nfs_type2fmt[type].nfs2type;
3230         fmode = nfs_type2fmt[type].mode;
3231
3232         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3233                 goto xdr_error;
3234         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3235                 goto xdr_error;
3236         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3237                 goto xdr_error;
3238         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3239                 goto xdr_error;
3240         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3241                                                 struct nfs4_fs_locations,
3242                                                 fattr))) != 0)
3243                 goto xdr_error;
3244         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3245                 goto xdr_error;
3246         fattr->mode |= fmode;
3247         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3248                 goto xdr_error;
3249         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3250                 goto xdr_error;
3251         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3252                 goto xdr_error;
3253         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3254                 goto xdr_error;
3255         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3256                 goto xdr_error;
3257         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3258                 goto xdr_error;
3259         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3260                 goto xdr_error;
3261         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3262                 goto xdr_error;
3263         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3264                 goto xdr_error;
3265         if (fattr->fileid == 0 && fileid != 0)
3266                 fattr->fileid = fileid;
3267         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3268                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3269 xdr_error:
3270         dprintk("%s: xdr returned %d\n", __func__, -status);
3271         return status;
3272 }
3273
3274
3275 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3276 {
3277         __be32 *savep;
3278         uint32_t attrlen, bitmap[2];
3279         int status;
3280
3281         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3282                 goto xdr_error;
3283         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3284                 goto xdr_error;
3285         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3286                 goto xdr_error;
3287
3288         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3289
3290         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3291                 goto xdr_error;
3292         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3293                 goto xdr_error;
3294         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3295                 goto xdr_error;
3296         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3297         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3298                 goto xdr_error;
3299         fsinfo->wtpref = fsinfo->wtmax;
3300
3301         status = verify_attr_len(xdr, savep, attrlen);
3302 xdr_error:
3303         dprintk("%s: xdr returned %d!\n", __func__, -status);
3304         return status;
3305 }
3306
3307 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3308 {
3309         __be32 *p;
3310         uint32_t len;
3311         int status;
3312
3313         /* Zero handle first to allow comparisons */
3314         memset(fh, 0, sizeof(*fh));
3315
3316         status = decode_op_hdr(xdr, OP_GETFH);
3317         if (status)
3318                 return status;
3319
3320         READ_BUF(4);
3321         READ32(len);
3322         if (len > NFS4_FHSIZE)
3323                 return -EIO;
3324         fh->size = len;
3325         READ_BUF(len);
3326         COPYMEM(fh->data, len);
3327         return 0;
3328 }
3329
3330 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3331 {
3332         int status;
3333
3334         status = decode_op_hdr(xdr, OP_LINK);
3335         if (status)
3336                 return status;
3337         return decode_change_info(xdr, cinfo);
3338 }
3339
3340 /*
3341  * We create the owner, so we know a proper owner.id length is 4.
3342  */
3343 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3344 {
3345         uint64_t offset, length, clientid;
3346         __be32 *p;
3347         uint32_t namelen, type;
3348
3349         READ_BUF(32);
3350         READ64(offset);
3351         READ64(length);
3352         READ32(type);
3353         if (fl != NULL) {
3354                 fl->fl_start = (loff_t)offset;
3355                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3356                 if (length == ~(uint64_t)0)
3357                         fl->fl_end = OFFSET_MAX;
3358                 fl->fl_type = F_WRLCK;
3359                 if (type & 1)
3360                         fl->fl_type = F_RDLCK;
3361                 fl->fl_pid = 0;
3362         }
3363         READ64(clientid);
3364         READ32(namelen);
3365         READ_BUF(namelen);
3366         return -NFS4ERR_DENIED;
3367 }
3368
3369 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3370 {
3371         __be32 *p;
3372         int status;
3373
3374         status = decode_op_hdr(xdr, OP_LOCK);
3375         if (status == -EIO)
3376                 goto out;
3377         if (status == 0) {
3378                 READ_BUF(NFS4_STATEID_SIZE);
3379                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3380         } else if (status == -NFS4ERR_DENIED)
3381                 status = decode_lock_denied(xdr, NULL);
3382         if (res->open_seqid != NULL)
3383                 nfs_increment_open_seqid(status, res->open_seqid);
3384         nfs_increment_lock_seqid(status, res->lock_seqid);
3385 out:
3386         return status;
3387 }
3388
3389 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3390 {
3391         int status;
3392         status = decode_op_hdr(xdr, OP_LOCKT);
3393         if (status == -NFS4ERR_DENIED)
3394                 return decode_lock_denied(xdr, res->denied);
3395         return status;
3396 }
3397
3398 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3399 {
3400         __be32 *p;
3401         int status;
3402
3403         status = decode_op_hdr(xdr, OP_LOCKU);
3404         if (status != -EIO)
3405                 nfs_increment_lock_seqid(status, res->seqid);
3406         if (status == 0) {
3407                 READ_BUF(NFS4_STATEID_SIZE);
3408                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3409         }
3410         return status;
3411 }
3412
3413 static int decode_lookup(struct xdr_stream *xdr)
3414 {
3415         return decode_op_hdr(xdr, OP_LOOKUP);
3416 }
3417
3418 /* This is too sick! */
3419 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3420 {
3421         __be32 *p;
3422         uint32_t limit_type, nblocks, blocksize;
3423
3424         READ_BUF(12);
3425         READ32(limit_type);
3426         switch (limit_type) {
3427         case 1:
3428                 READ64(*maxsize);
3429                 break;
3430         case 2:
3431                 READ32(nblocks);
3432                 READ32(blocksize);
3433                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3434         }
3435         return 0;
3436 }
3437
3438 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3439 {
3440         __be32 *p;
3441         uint32_t delegation_type;
3442
3443         READ_BUF(4);
3444         READ32(delegation_type);
3445         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3446                 res->delegation_type = 0;
3447                 return 0;
3448         }
3449         READ_BUF(NFS4_STATEID_SIZE+4);
3450         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3451         READ32(res->do_recall);
3452
3453         switch (delegation_type) {
3454         case NFS4_OPEN_DELEGATE_READ:
3455                 res->delegation_type = FMODE_READ;
3456                 break;
3457         case NFS4_OPEN_DELEGATE_WRITE:
3458                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3459                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3460                                 return -EIO;
3461         }
3462         return decode_ace(xdr, NULL, res->server->nfs_client);
3463 }
3464
3465 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3466 {
3467         __be32 *p;
3468         uint32_t savewords, bmlen, i;
3469         int status;
3470
3471         status = decode_op_hdr(xdr, OP_OPEN);
3472         if (status != -EIO)
3473                 nfs_increment_open_seqid(status, res->seqid);
3474         if (status)
3475                 return status;
3476         READ_BUF(NFS4_STATEID_SIZE);
3477         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3478
3479         decode_change_info(xdr, &res->cinfo);
3480
3481         READ_BUF(8);
3482         READ32(res->rflags);
3483         READ32(bmlen);
3484         if (bmlen > 10)
3485                 goto xdr_error;
3486
3487         READ_BUF(bmlen << 2);
3488         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3489         for (i = 0; i < savewords; ++i)
3490                 READ32(res->attrset[i]);
3491         for (; i < NFS4_BITMAP_SIZE; i++)
3492                 res->attrset[i] = 0;
3493
3494         return decode_delegation(xdr, res);
3495 xdr_error:
3496         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3497         return -EIO;
3498 }
3499
3500 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3501 {
3502         __be32 *p;
3503         int status;
3504
3505         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3506         if (status != -EIO)
3507                 nfs_increment_open_seqid(status, res->seqid);
3508         if (status)
3509                 return status;
3510         READ_BUF(NFS4_STATEID_SIZE);
3511         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3512         return 0;
3513 }
3514
3515 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3516 {
3517         __be32 *p;
3518         int status;
3519
3520         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3521         if (status != -EIO)
3522                 nfs_increment_open_seqid(status, res->seqid);
3523         if (status)
3524                 return status;
3525         READ_BUF(NFS4_STATEID_SIZE);
3526         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3527         return 0;
3528 }
3529
3530 static int decode_putfh(struct xdr_stream *xdr)
3531 {
3532         return decode_op_hdr(xdr, OP_PUTFH);
3533 }
3534
3535 static int decode_putrootfh(struct xdr_stream *xdr)
3536 {
3537         return decode_op_hdr(xdr, OP_PUTROOTFH);
3538 }
3539
3540 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3541 {
3542         struct kvec *iov = req->rq_rcv_buf.head;
3543         __be32 *p;
3544         uint32_t count, eof, recvd, hdrlen;
3545         int status;
3546
3547         status = decode_op_hdr(xdr, OP_READ);
3548         if (status)
3549                 return status;
3550         READ_BUF(8);
3551         READ32(eof);
3552         READ32(count);
3553         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3554         recvd = req->rq_rcv_buf.len - hdrlen;
3555         if (count > recvd) {
3556                 dprintk("NFS: server cheating in read reply: "
3557                                 "count %u > recvd %u\n", count, recvd);
3558                 count = recvd;
3559                 eof = 0;
3560         }
3561         xdr_read_pages(xdr, count);
3562         res->eof = eof;
3563         res->count = count;
3564         return 0;
3565 }
3566
3567 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3568 {
3569         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3570         struct page     *page = *rcvbuf->pages;
3571         struct kvec     *iov = rcvbuf->head;
3572         size_t          hdrlen;
3573         u32             recvd, pglen = rcvbuf->page_len;
3574         __be32          *end, *entry, *p, *kaddr;
3575         unsigned int    nr = 0;
3576         int             status;
3577
3578         status = decode_op_hdr(xdr, OP_READDIR);
3579         if (status)
3580                 return status;
3581         READ_BUF(8);
3582         COPYMEM(readdir->verifier.data, 8);
3583         dprintk("%s: verifier = %08x:%08x\n",
3584                         __func__,
3585                         ((u32 *)readdir->verifier.data)[0],
3586                         ((u32 *)readdir->verifier.data)[1]);
3587
3588
3589         hdrlen = (char *) p - (char *) iov->iov_base;
3590         recvd = rcvbuf->len - hdrlen;
3591         if (pglen > recvd)
3592                 pglen = recvd;
3593         xdr_read_pages(xdr, pglen);
3594
3595         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3596         kaddr = p = kmap_atomic(page, KM_USER0);
3597         end = p + ((pglen + readdir->pgbase) >> 2);
3598         entry = p;
3599
3600         /* Make sure the packet actually has a value_follows and EOF entry */
3601         if ((entry + 1) > end)
3602                 goto short_pkt;
3603
3604         for (; *p++; nr++) {
3605                 u32 len, attrlen, xlen;
3606                 if (end - p < 3)
3607                         goto short_pkt;
3608                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3609                 p += 2;                 /* cookie */
3610                 len = ntohl(*p++);      /* filename length */
3611                 if (len > NFS4_MAXNAMLEN) {
3612                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3613                                         len);
3614                         goto err_unmap;
3615                 }
3616                 xlen = XDR_QUADLEN(len);
3617                 if (end - p < xlen + 1)
3618                         goto short_pkt;
3619                 dprintk("filename = %*s\n", len, (char *)p);
3620                 p += xlen;
3621                 len = ntohl(*p++);      /* bitmap length */
3622                 if (end - p < len + 1)
3623                         goto short_pkt;
3624                 p += len;
3625                 attrlen = XDR_QUADLEN(ntohl(*p++));
3626                 if (end - p < attrlen + 2)
3627                         goto short_pkt;
3628                 p += attrlen;           /* attributes */
3629                 entry = p;
3630         }
3631         /*
3632          * Apparently some server sends responses that are a valid size, but
3633          * contain no entries, and have value_follows==0 and EOF==0. For
3634          * those, just set the EOF marker.
3635          */
3636         if (!nr && entry[1] == 0) {
3637                 dprintk("NFS: readdir reply truncated!\n");
3638                 entry[1] = 1;
3639         }
3640 out:
3641         kunmap_atomic(kaddr, KM_USER0);
3642         return 0;
3643 short_pkt:
3644         /*
3645          * When we get a short packet there are 2 possibilities. We can
3646          * return an error, or fix up the response to look like a valid
3647          * response and return what we have so far. If there are no
3648          * entries and the packet was short, then return -EIO. If there
3649          * are valid entries in the response, return them and pretend that
3650          * the call was successful, but incomplete. The caller can retry the
3651          * readdir starting at the last cookie.
3652          */
3653         dprintk("%s: short packet at entry %d\n", __func__, nr);
3654         entry[0] = entry[1] = 0;
3655         if (nr)
3656                 goto out;
3657 err_unmap:
3658         kunmap_atomic(kaddr, KM_USER0);
3659         return -errno_NFSERR_IO;
3660 }
3661
3662 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3663 {
3664         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3665         struct kvec *iov = rcvbuf->head;
3666         size_t hdrlen;
3667         u32 len, recvd;
3668         __be32 *p;
3669         char *kaddr;
3670         int status;
3671
3672         status = decode_op_hdr(xdr, OP_READLINK);
3673         if (status)
3674                 return status;
3675
3676         /* Convert length of symlink */
3677         READ_BUF(4);
3678         READ32(len);
3679         if (len >= rcvbuf->page_len || len <= 0) {
3680                 dprintk("nfs: server returned giant symlink!\n");
3681                 return -ENAMETOOLONG;
3682         }
3683         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3684         recvd = req->rq_rcv_buf.len - hdrlen;
3685         if (recvd < len) {
3686                 dprintk("NFS: server cheating in readlink reply: "
3687                                 "count %u > recvd %u\n", len, recvd);
3688                 return -EIO;
3689         }
3690         xdr_read_pages(xdr, len);
3691         /*
3692          * The XDR encode routine has set things up so that
3693          * the link text will be copied directly into the
3694          * buffer.  We just have to do overflow-checking,
3695          * and and null-terminate the text (the VFS expects
3696          * null-termination).
3697          */
3698         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3699         kaddr[len+rcvbuf->page_base] = '\0';
3700         kunmap_atomic(kaddr, KM_USER0);
3701         return 0;
3702 }
3703
3704 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3705 {
3706         int status;
3707
3708         status = decode_op_hdr(xdr, OP_REMOVE);
3709         if (status)
3710                 goto out;
3711         status = decode_change_info(xdr, cinfo);
3712 out:
3713         return status;
3714 }
3715
3716 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3717               struct nfs4_change_info *new_cinfo)
3718 {
3719         int status;
3720
3721         status = decode_op_hdr(xdr, OP_RENAME);
3722         if (status)
3723                 goto out;
3724         if ((status = decode_change_info(xdr, old_cinfo)))
3725                 goto out;
3726         status = decode_change_info(xdr, new_cinfo);
3727 out:
3728         return status;
3729 }
3730
3731 static int decode_renew(struct xdr_stream *xdr)
3732 {
3733         return decode_op_hdr(xdr, OP_RENEW);
3734 }
3735
3736 static int
3737 decode_restorefh(struct xdr_stream *xdr)
3738 {
3739         return decode_op_hdr(xdr, OP_RESTOREFH);
3740 }
3741
3742 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3743                 size_t *acl_len)
3744 {
3745         __be32 *savep;
3746         uint32_t attrlen,
3747                  bitmap[2] = {0};
3748         struct kvec *iov = req->rq_rcv_buf.head;
3749         int status;
3750
3751         *acl_len = 0;
3752         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3753                 goto out;
3754         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3755                 goto out;
3756         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3757                 goto out;
3758
3759         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3760                 return -EIO;
3761         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3762                 size_t hdrlen;
3763                 u32 recvd;
3764
3765                 /* We ignore &savep and don't do consistency checks on
3766                  * the attr length.  Let userspace figure it out.... */
3767                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3768                 recvd = req->rq_rcv_buf.len - hdrlen;
3769                 if (attrlen > recvd) {
3770                         dprintk("NFS: server cheating in getattr"
3771                                         " acl reply: attrlen %u > recvd %u\n",
3772                                         attrlen, recvd);
3773                         return -EINVAL;
3774                 }
3775                 xdr_read_pages(xdr, attrlen);
3776                 *acl_len = attrlen;
3777         } else
3778                 status = -EOPNOTSUPP;
3779
3780 out:
3781         return status;
3782 }
3783
3784 static int
3785 decode_savefh(struct xdr_stream *xdr)
3786 {
3787         return decode_op_hdr(xdr, OP_SAVEFH);
3788 }
3789
3790 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3791 {
3792         __be32 *p;
3793         uint32_t bmlen;
3794         int status;
3795
3796         status = decode_op_hdr(xdr, OP_SETATTR);
3797         if (status)
3798                 return status;
3799         READ_BUF(4);
3800         READ32(bmlen);
3801         READ_BUF(bmlen << 2);
3802         return 0;
3803 }
3804
3805 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3806 {
3807         __be32 *p;
3808         uint32_t opnum;
3809         int32_t nfserr;
3810
3811         READ_BUF(8);
3812         READ32(opnum);
3813         if (opnum != OP_SETCLIENTID) {
3814                 dprintk("nfs: decode_setclientid: Server returned operation"
3815                         " %d\n", opnum);
3816                 return -EIO;
3817         }
3818         READ32(nfserr);
3819         if (nfserr == NFS_OK) {
3820                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3821                 READ64(clp->cl_clientid);
3822                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3823         } else if (nfserr == NFSERR_CLID_INUSE) {
3824                 uint32_t len;
3825
3826                 /* skip netid string */
3827                 READ_BUF(4);
3828                 READ32(len);
3829                 READ_BUF(len);
3830
3831                 /* skip uaddr string */
3832                 READ_BUF(4);
3833                 READ32(len);
3834                 READ_BUF(len);
3835                 return -NFSERR_CLID_INUSE;
3836         } else
3837                 return nfs4_stat_to_errno(nfserr);
3838
3839         return 0;
3840 }
3841
3842 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3843 {
3844         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3845 }
3846
3847 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3848 {
3849         __be32 *p;
3850         int status;
3851
3852         status = decode_op_hdr(xdr, OP_WRITE);
3853         if (status)
3854                 return status;
3855
3856         READ_BUF(16);
3857         READ32(res->count);
3858         READ32(res->verf->committed);
3859         COPYMEM(res->verf->verifier, 8);
3860         return 0;
3861 }
3862
3863 static int decode_delegreturn(struct xdr_stream *xdr)
3864 {
3865         return decode_op_hdr(xdr, OP_DELEGRETURN);
3866 }
3867
3868 /*
3869  * END OF "GENERIC" DECODE ROUTINES.
3870  */
3871
3872 /*
3873  * Decode OPEN_DOWNGRADE response
3874  */
3875 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3876 {
3877         struct xdr_stream xdr;
3878         struct compound_hdr hdr;
3879         int status;
3880
3881         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3882         status = decode_compound_hdr(&xdr, &hdr);
3883         if (status)
3884                 goto out;
3885         status = decode_putfh(&xdr);
3886         if (status)
3887                 goto out;
3888         status = decode_open_downgrade(&xdr, res);
3889         if (status != 0)
3890                 goto out;
3891         decode_getfattr(&xdr, res->fattr, res->server);
3892 out:
3893         return status;
3894 }
3895
3896 /*
3897  * Decode ACCESS response
3898  */
3899 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3900 {
3901         struct xdr_stream xdr;
3902         struct compound_hdr hdr;
3903         int status;
3904
3905         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3906         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3907                 goto out;
3908         status = decode_putfh(&xdr);
3909         if (status != 0)
3910                 goto out;
3911         status = decode_access(&xdr, res);
3912         if (status != 0)
3913                 goto out;
3914         decode_getfattr(&xdr, res->fattr, res->server);
3915 out:
3916         return status;
3917 }
3918
3919 /*
3920  * Decode LOOKUP response
3921  */
3922 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3923 {
3924         struct xdr_stream xdr;
3925         struct compound_hdr hdr;
3926         int status;
3927
3928         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3929         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3930                 goto out;
3931         if ((status = decode_putfh(&xdr)) != 0)
3932                 goto out;
3933         if ((status = decode_lookup(&xdr)) != 0)
3934                 goto out;
3935         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3936                 goto out;
3937         status = decode_getfattr(&xdr, res->fattr, res->server);
3938 out:
3939         return status;
3940 }
3941
3942 /*
3943  * Decode LOOKUP_ROOT response
3944  */
3945 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3946 {
3947         struct xdr_stream xdr;
3948         struct compound_hdr hdr;
3949         int status;
3950
3951         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3952         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3953                 goto out;
3954         if ((status = decode_putrootfh(&xdr)) != 0)
3955                 goto out;
3956         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3957                 status = decode_getfattr(&xdr, res->fattr, res->server);
3958 out:
3959         return status;
3960 }
3961
3962 /*
3963  * Decode REMOVE response
3964  */
3965 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3966 {
3967         struct xdr_stream xdr;
3968         struct compound_hdr hdr;
3969         int status;
3970
3971         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3972         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3973                 goto out;
3974         if ((status = decode_putfh(&xdr)) != 0)
3975                 goto out;
3976         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3977                 goto out;
3978         decode_getfattr(&xdr, &res->dir_attr, res->server);
3979 out:
3980         return status;
3981 }
3982
3983 /*
3984  * Decode RENAME response
3985  */
3986 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3987 {
3988         struct xdr_stream xdr;
3989         struct compound_hdr hdr;
3990         int status;
3991
3992         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3993         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3994                 goto out;
3995         if ((status = decode_putfh(&xdr)) != 0)
3996                 goto out;
3997         if ((status = decode_savefh(&xdr)) != 0)
3998                 goto out;
3999         if ((status = decode_putfh(&xdr)) != 0)
4000                 goto out;
4001         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4002                 goto out;
4003         /* Current FH is target directory */
4004         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4005                 goto out;
4006         if ((status = decode_restorefh(&xdr)) != 0)
4007                 goto out;
4008         decode_getfattr(&xdr, res->old_fattr, res->server);
4009 out:
4010         return status;
4011 }
4012
4013 /*
4014  * Decode LINK response
4015  */
4016 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4017 {
4018         struct xdr_stream xdr;
4019         struct compound_hdr hdr;
4020         int status;
4021
4022         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4023         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4024                 goto out;
4025         if ((status = decode_putfh(&xdr)) != 0)
4026                 goto out;
4027         if ((status = decode_savefh(&xdr)) != 0)
4028                 goto out;
4029         if ((status = decode_putfh(&xdr)) != 0)
4030                 goto out;
4031         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4032                 goto out;
4033         /*
4034          * Note order: OP_LINK leaves the directory as the current
4035          *             filehandle.
4036          */
4037         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4038                 goto out;
4039         if ((status = decode_restorefh(&xdr)) != 0)
4040                 goto out;
4041         decode_getfattr(&xdr, res->fattr, res->server);
4042 out:
4043         return status;
4044 }
4045
4046 /*
4047  * Decode CREATE response
4048  */
4049 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4050 {
4051         struct xdr_stream xdr;
4052         struct compound_hdr hdr;
4053         int status;
4054
4055         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4056         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4057                 goto out;
4058         if ((status = decode_putfh(&xdr)) != 0)
4059                 goto out;
4060         if ((status = decode_savefh(&xdr)) != 0)
4061                 goto out;
4062         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4063                 goto out;
4064         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4065                 goto out;
4066         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4067                 goto out;
4068         if ((status = decode_restorefh(&xdr)) != 0)
4069                 goto out;
4070         decode_getfattr(&xdr, res->dir_fattr, res->server);
4071 out:
4072         return status;
4073 }
4074
4075 /*
4076  * Decode SYMLINK response
4077  */
4078 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4079 {
4080         return nfs4_xdr_dec_create(rqstp, p, res);
4081 }
4082
4083 /*
4084  * Decode GETATTR response
4085  */
4086 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4087 {
4088         struct xdr_stream xdr;
4089         struct compound_hdr hdr;
4090         int status;
4091
4092         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4093         status = decode_compound_hdr(&xdr, &hdr);
4094         if (status)
4095                 goto out;
4096         status = decode_putfh(&xdr);
4097         if (status)
4098                 goto out;
4099         status = decode_getfattr(&xdr, res->fattr, res->server);
4100 out:
4101         return status;
4102 }
4103
4104 /*
4105  * Encode an SETACL request
4106  */
4107 static int
4108 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4109 {
4110         struct xdr_stream xdr;
4111         struct compound_hdr hdr = {
4112                 .nops   = 0,
4113         };
4114         int status;
4115
4116         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4117         encode_compound_hdr(&xdr, &hdr);
4118         status = encode_putfh(&xdr, args->fh, &hdr);
4119         if (status)
4120                 goto out;
4121         status = encode_setacl(&xdr, args, &hdr);
4122 out:
4123         encode_nops(&hdr);
4124         return status;
4125 }
4126
4127 /*
4128  * Decode SETACL response
4129  */
4130 static int
4131 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4132 {
4133         struct xdr_stream xdr;
4134         struct compound_hdr hdr;
4135         int status;
4136
4137         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4138         status = decode_compound_hdr(&xdr, &hdr);
4139         if (status)
4140                 goto out;
4141         status = decode_putfh(&xdr);
4142         if (status)
4143                 goto out;
4144         status = decode_setattr(&xdr, res);
4145 out:
4146         return status;
4147 }
4148
4149 /*
4150  * Decode GETACL response
4151  */
4152 static int
4153 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4154 {
4155         struct xdr_stream xdr;
4156         struct compound_hdr hdr;
4157         int status;
4158
4159         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4160         status = decode_compound_hdr(&xdr, &hdr);
4161         if (status)
4162                 goto out;
4163         status = decode_putfh(&xdr);
4164         if (status)
4165                 goto out;
4166         status = decode_getacl(&xdr, rqstp, acl_len);
4167
4168 out:
4169         return status;
4170 }
4171
4172 /*
4173  * Decode CLOSE response
4174  */
4175 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4176 {
4177         struct xdr_stream xdr;
4178         struct compound_hdr hdr;
4179         int status;
4180
4181         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4182         status = decode_compound_hdr(&xdr, &hdr);
4183         if (status)
4184                 goto out;
4185         status = decode_putfh(&xdr);
4186         if (status)
4187                 goto out;
4188         status = decode_close(&xdr, res);
4189         if (status != 0)
4190                 goto out;
4191         /*
4192          * Note: Server may do delete on close for this file
4193          *      in which case the getattr call will fail with
4194          *      an ESTALE error. Shouldn't be a problem,
4195          *      though, since fattr->valid will remain unset.
4196          */
4197         decode_getfattr(&xdr, res->fattr, res->server);
4198 out:
4199         return status;
4200 }
4201
4202 /*
4203  * Decode OPEN response
4204  */
4205 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4206 {
4207         struct xdr_stream xdr;
4208         struct compound_hdr hdr;
4209         int status;
4210
4211         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4212         status = decode_compound_hdr(&xdr, &hdr);
4213         if (status)
4214                 goto out;
4215         status = decode_putfh(&xdr);
4216         if (status)
4217                 goto out;
4218         status = decode_savefh(&xdr);
4219         if (status)
4220                 goto out;
4221         status = decode_open(&xdr, res);
4222         if (status)
4223                 goto out;
4224         if (decode_getfh(&xdr, &res->fh) != 0)
4225                 goto out;
4226         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4227                 goto out;
4228         if (decode_restorefh(&xdr) != 0)
4229                 goto out;
4230         decode_getfattr(&xdr, res->dir_attr, res->server);
4231 out:
4232         return status;
4233 }
4234
4235 /*
4236  * Decode OPEN_CONFIRM response
4237  */
4238 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4239 {
4240         struct xdr_stream xdr;
4241         struct compound_hdr hdr;
4242         int status;
4243
4244         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4245         status = decode_compound_hdr(&xdr, &hdr);
4246         if (status)
4247                 goto out;
4248         status = decode_putfh(&xdr);
4249         if (status)
4250                 goto out;
4251         status = decode_open_confirm(&xdr, res);
4252 out:
4253         return status;
4254 }
4255
4256 /*
4257  * Decode OPEN response
4258  */
4259 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4260 {
4261         struct xdr_stream xdr;
4262         struct compound_hdr hdr;
4263         int status;
4264
4265         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4266         status = decode_compound_hdr(&xdr, &hdr);
4267         if (status)
4268                 goto out;
4269         status = decode_putfh(&xdr);
4270         if (status)
4271                 goto out;
4272         status = decode_open(&xdr, res);
4273         if (status)
4274                 goto out;
4275         decode_getfattr(&xdr, res->f_attr, res->server);
4276 out:
4277         return status;
4278 }
4279
4280 /*
4281  * Decode SETATTR response
4282  */
4283 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4284 {
4285         struct xdr_stream xdr;
4286         struct compound_hdr hdr;
4287         int status;
4288
4289         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4290         status = decode_compound_hdr(&xdr, &hdr);
4291         if (status)
4292                 goto out;
4293         status = decode_putfh(&xdr);
4294         if (status)
4295                 goto out;
4296         status = decode_setattr(&xdr, res);
4297         if (status)
4298                 goto out;
4299         status = decode_getfattr(&xdr, res->fattr, res->server);
4300         if (status == NFS4ERR_DELAY)
4301                 status = 0;
4302 out:
4303         return status;
4304 }
4305
4306 /*
4307  * Decode LOCK response
4308  */
4309 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4310 {
4311         struct xdr_stream xdr;
4312         struct compound_hdr hdr;
4313         int status;
4314
4315         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4316         status = decode_compound_hdr(&xdr, &hdr);
4317         if (status)
4318                 goto out;
4319         status = decode_putfh(&xdr);
4320         if (status)
4321                 goto out;
4322         status = decode_lock(&xdr, res);
4323 out:
4324         return status;
4325 }
4326
4327 /*
4328  * Decode LOCKT response
4329  */
4330 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4331 {
4332         struct xdr_stream xdr;
4333         struct compound_hdr hdr;
4334         int status;
4335
4336         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4337         status = decode_compound_hdr(&xdr, &hdr);
4338         if (status)
4339                 goto out;
4340         status = decode_putfh(&xdr);
4341         if (status)
4342                 goto out;
4343         status = decode_lockt(&xdr, res);
4344 out:
4345         return status;
4346 }
4347
4348 /*
4349  * Decode LOCKU response
4350  */
4351 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4352 {
4353         struct xdr_stream xdr;
4354         struct compound_hdr hdr;
4355         int status;
4356
4357         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4358         status = decode_compound_hdr(&xdr, &hdr);
4359         if (status)
4360                 goto out;
4361         status = decode_putfh(&xdr);
4362         if (status)
4363                 goto out;
4364         status = decode_locku(&xdr, res);
4365 out:
4366         return status;
4367 }
4368
4369 /*
4370  * Decode READLINK response
4371  */
4372 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4373 {
4374         struct xdr_stream xdr;
4375         struct compound_hdr hdr;
4376         int status;
4377
4378         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4379         status = decode_compound_hdr(&xdr, &hdr);
4380         if (status)
4381                 goto out;
4382         status = decode_putfh(&xdr);
4383         if (status)
4384                 goto out;
4385         status = decode_readlink(&xdr, rqstp);
4386 out:
4387         return status;
4388 }
4389
4390 /*
4391  * Decode READDIR response
4392  */
4393 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4394 {
4395         struct xdr_stream xdr;
4396         struct compound_hdr hdr;
4397         int status;
4398
4399         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4400         status = decode_compound_hdr(&xdr, &hdr);
4401         if (status)
4402                 goto out;
4403         status = decode_putfh(&xdr);
4404         if (status)
4405                 goto out;
4406         status = decode_readdir(&xdr, rqstp, res);
4407 out:
4408         return status;
4409 }
4410
4411 /*
4412  * Decode Read response
4413  */
4414 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4415 {
4416         struct xdr_stream xdr;
4417         struct compound_hdr hdr;
4418         int status;
4419
4420         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4421         status = decode_compound_hdr(&xdr, &hdr);
4422         if (status)
4423                 goto out;
4424         status = decode_putfh(&xdr);
4425         if (status)
4426                 goto out;
4427         status = decode_read(&xdr, rqstp, res);
4428         if (!status)
4429                 status = res->count;
4430 out:
4431         return status;
4432 }
4433
4434 /*
4435  * Decode WRITE response
4436  */
4437 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4438 {
4439         struct xdr_stream xdr;
4440         struct compound_hdr hdr;
4441         int status;
4442
4443         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4444         status = decode_compound_hdr(&xdr, &hdr);
4445         if (status)
4446                 goto out;
4447         status = decode_putfh(&xdr);
4448         if (status)
4449                 goto out;
4450         status = decode_write(&xdr, res);
4451         if (status)
4452                 goto out;
4453         decode_getfattr(&xdr, res->fattr, res->server);
4454         if (!status)
4455                 status = res->count;
4456 out:
4457         return status;
4458 }
4459
4460 /*
4461  * Decode COMMIT response
4462  */
4463 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4464 {
4465         struct xdr_stream xdr;
4466         struct compound_hdr hdr;
4467         int status;
4468
4469         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4470         status = decode_compound_hdr(&xdr, &hdr);
4471         if (status)
4472                 goto out;
4473         status = decode_putfh(&xdr);
4474         if (status)
4475                 goto out;
4476         status = decode_commit(&xdr, res);
4477         if (status)
4478                 goto out;
4479         decode_getfattr(&xdr, res->fattr, res->server);
4480 out:
4481         return status;
4482 }
4483
4484 /*
4485  * FSINFO request
4486  */
4487 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4488 {
4489         struct xdr_stream xdr;
4490         struct compound_hdr hdr;
4491         int status;
4492
4493         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4494         status = decode_compound_hdr(&xdr, &hdr);
4495         if (!status)
4496                 status = decode_putfh(&xdr);
4497         if (!status)
4498                 status = decode_fsinfo(&xdr, fsinfo);
4499         return status;
4500 }
4501
4502 /*
4503  * PATHCONF request
4504  */
4505 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4506 {
4507         struct xdr_stream xdr;
4508         struct compound_hdr hdr;
4509         int status;
4510
4511         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4512         status = decode_compound_hdr(&xdr, &hdr);
4513         if (!status)
4514                 status = decode_putfh(&xdr);
4515         if (!status)
4516                 status = decode_pathconf(&xdr, pathconf);
4517         return status;
4518 }
4519
4520 /*
4521  * STATFS request
4522  */
4523 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4524 {
4525         struct xdr_stream xdr;
4526         struct compound_hdr hdr;
4527         int status;
4528
4529         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4530         status = decode_compound_hdr(&xdr, &hdr);
4531         if (!status)
4532                 status = decode_putfh(&xdr);
4533         if (!status)
4534                 status = decode_statfs(&xdr, fsstat);
4535         return status;
4536 }
4537
4538 /*
4539  * GETATTR_BITMAP request
4540  */
4541 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4542 {
4543         struct xdr_stream xdr;
4544         struct compound_hdr hdr;
4545         int status;
4546
4547         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4548         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4549                 goto out;
4550         if ((status = decode_putfh(&xdr)) != 0)
4551                 goto out;
4552         status = decode_server_caps(&xdr, res);
4553 out:
4554         return status;
4555 }
4556
4557 /*
4558  * Decode RENEW response
4559  */
4560 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4561 {
4562         struct xdr_stream xdr;
4563         struct compound_hdr hdr;
4564         int status;
4565
4566         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4567         status = decode_compound_hdr(&xdr, &hdr);
4568         if (!status)
4569                 status = decode_renew(&xdr);
4570         return status;
4571 }
4572
4573 /*
4574  * a SETCLIENTID request
4575  */
4576 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4577                 struct nfs_client *clp)
4578 {
4579         struct xdr_stream xdr;
4580         struct compound_hdr hdr;
4581         int status;
4582
4583         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4584         status = decode_compound_hdr(&xdr, &hdr);
4585         if (!status)
4586                 status = decode_setclientid(&xdr, clp);
4587         return status;
4588 }
4589
4590 /*
4591  * a SETCLIENTID_CONFIRM request
4592  */
4593 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4594 {
4595         struct xdr_stream xdr;
4596         struct compound_hdr hdr;
4597         int status;
4598
4599         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4600         status = decode_compound_hdr(&xdr, &hdr);
4601         if (!status)
4602                 status = decode_setclientid_confirm(&xdr);
4603         if (!status)
4604                 status = decode_putrootfh(&xdr);
4605         if (!status)
4606                 status = decode_fsinfo(&xdr, fsinfo);
4607         return status;
4608 }
4609
4610 /*
4611  * DELEGRETURN request
4612  */
4613 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4614 {
4615         struct xdr_stream xdr;
4616         struct compound_hdr hdr;
4617         int status;
4618
4619         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4620         status = decode_compound_hdr(&xdr, &hdr);
4621         if (status != 0)
4622                 goto out;
4623         status = decode_putfh(&xdr);
4624         if (status != 0)
4625                 goto out;
4626         status = decode_delegreturn(&xdr);
4627         decode_getfattr(&xdr, res->fattr, res->server);
4628 out:
4629         return status;
4630 }
4631
4632 /*
4633  * FS_LOCATIONS request
4634  */
4635 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4636 {
4637         struct xdr_stream xdr;
4638         struct compound_hdr hdr;
4639         int status;
4640
4641         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4642         status = decode_compound_hdr(&xdr, &hdr);
4643         if (status != 0)
4644                 goto out;
4645         if ((status = decode_putfh(&xdr)) != 0)
4646                 goto out;
4647         if ((status = decode_lookup(&xdr)) != 0)
4648                 goto out;
4649         xdr_enter_page(&xdr, PAGE_SIZE);
4650         status = decode_getfattr(&xdr, &res->fattr, res->server);
4651 out:
4652         return status;
4653 }
4654
4655 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4656 {
4657         uint32_t bitmap[2] = {0};
4658         uint32_t len;
4659
4660         if (!*p++) {
4661                 if (!*p)
4662                         return ERR_PTR(-EAGAIN);
4663                 entry->eof = 1;
4664                 return ERR_PTR(-EBADCOOKIE);
4665         }
4666
4667         entry->prev_cookie = entry->cookie;
4668         p = xdr_decode_hyper(p, &entry->cookie);
4669         entry->len = ntohl(*p++);
4670         entry->name = (const char *) p;
4671         p += XDR_QUADLEN(entry->len);
4672
4673         /*
4674          * In case the server doesn't return an inode number,
4675          * we fake one here.  (We don't use inode number 0,
4676          * since glibc seems to choke on it...)
4677          */
4678         entry->ino = 1;
4679
4680         len = ntohl(*p++);              /* bitmap length */
4681         if (len-- > 0) {
4682                 bitmap[0] = ntohl(*p++);
4683                 if (len-- > 0) {
4684                         bitmap[1] = ntohl(*p++);
4685                         p += len;
4686                 }
4687         }
4688         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4689         if (len > 0) {
4690                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4691                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4692                         /* Ignore the return value of rdattr_error for now */
4693                         p++;
4694                         len--;
4695                 }
4696                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4697                         xdr_decode_hyper(p, &entry->ino);
4698                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4699                         xdr_decode_hyper(p, &entry->ino);
4700                 p += len;
4701         }
4702
4703         entry->eof = !p[0] && p[1];
4704         return p;
4705 }
4706
4707 /*
4708  * We need to translate between nfs status return values and
4709  * the local errno values which may not be the same.
4710  */
4711 static struct {
4712         int stat;
4713         int errno;
4714 } nfs_errtbl[] = {
4715         { NFS4_OK,              0               },
4716         { NFS4ERR_PERM,         -EPERM          },
4717         { NFS4ERR_NOENT,        -ENOENT         },
4718         { NFS4ERR_IO,           -errno_NFSERR_IO},
4719         { NFS4ERR_NXIO,         -ENXIO          },
4720         { NFS4ERR_ACCESS,       -EACCES         },
4721         { NFS4ERR_EXIST,        -EEXIST         },
4722         { NFS4ERR_XDEV,         -EXDEV          },
4723         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4724         { NFS4ERR_ISDIR,        -EISDIR         },
4725         { NFS4ERR_INVAL,        -EINVAL         },
4726         { NFS4ERR_FBIG,         -EFBIG          },
4727         { NFS4ERR_NOSPC,        -ENOSPC         },
4728         { NFS4ERR_ROFS,         -EROFS          },
4729         { NFS4ERR_MLINK,        -EMLINK         },
4730         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4731         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4732         { NFS4ERR_DQUOT,        -EDQUOT         },
4733         { NFS4ERR_STALE,        -ESTALE         },
4734         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4735         { NFS4ERR_BADOWNER,     -EINVAL         },
4736         { NFS4ERR_BADNAME,      -EINVAL         },
4737         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4738         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4739         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4740         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4741         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4742         { NFS4ERR_LOCKED,       -EAGAIN         },
4743         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4744         { NFS4ERR_SYMLINK,      -ELOOP          },
4745         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4746         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4747         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4748                                                     * to be handled by a
4749                                                     * middle-layer.
4750                                                     */
4751         { -1,                   -EIO            }
4752 };
4753
4754 /*
4755  * Convert an NFS error code to a local one.
4756  * This one is used jointly by NFSv2 and NFSv3.
4757  */
4758 static int
4759 nfs4_stat_to_errno(int stat)
4760 {
4761         int i;
4762         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4763                 if (nfs_errtbl[i].stat == stat)
4764                         return nfs_errtbl[i].errno;
4765         }
4766         if (stat <= 10000 || stat > 10100) {
4767                 /* The server is looney tunes. */
4768                 return -ESERVERFAULT;
4769         }
4770         /* If we cannot translate the error, the recovery routines should
4771          * handle it.
4772          * Note: remaining NFSv4 error codes have values > 10000, so should
4773          * not conflict with native Linux error codes.
4774          */
4775         return -stat;
4776 }
4777
4778 #define PROC(proc, argtype, restype)                            \
4779 [NFSPROC4_CLNT_##proc] = {                                      \
4780         .p_proc   = NFSPROC4_COMPOUND,                          \
4781         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4782         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4783         .p_arglen = NFS4_##argtype##_sz,                        \
4784         .p_replen = NFS4_##restype##_sz,                        \
4785         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4786         .p_name   = #proc,                                      \
4787 }
4788
4789 struct rpc_procinfo     nfs4_procedures[] = {
4790   PROC(READ,            enc_read,       dec_read),
4791   PROC(WRITE,           enc_write,      dec_write),
4792   PROC(COMMIT,          enc_commit,     dec_commit),
4793   PROC(OPEN,            enc_open,       dec_open),
4794   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4795   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4796   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4797   PROC(CLOSE,           enc_close,      dec_close),
4798   PROC(SETATTR,         enc_setattr,    dec_setattr),
4799   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4800   PROC(RENEW,           enc_renew,      dec_renew),
4801   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4802   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4803   PROC(LOCK,            enc_lock,       dec_lock),
4804   PROC(LOCKT,           enc_lockt,      dec_lockt),
4805   PROC(LOCKU,           enc_locku,      dec_locku),
4806   PROC(ACCESS,          enc_access,     dec_access),
4807   PROC(GETATTR,         enc_getattr,    dec_getattr),
4808   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4809   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4810   PROC(REMOVE,          enc_remove,     dec_remove),
4811   PROC(RENAME,          enc_rename,     dec_rename),
4812   PROC(LINK,            enc_link,       dec_link),
4813   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4814   PROC(CREATE,          enc_create,     dec_create),
4815   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4816   PROC(STATFS,          enc_statfs,     dec_statfs),
4817   PROC(READLINK,        enc_readlink,   dec_readlink),
4818   PROC(READDIR,         enc_readdir,    dec_readdir),
4819   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4820   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4821   PROC(GETACL,          enc_getacl,     dec_getacl),
4822   PROC(SETACL,          enc_setacl,     dec_setacl),
4823   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4824 };
4825
4826 struct rpc_version              nfs_version4 = {
4827         .number                 = 4,
4828         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4829         .procs                  = nfs4_procedures
4830 };
4831
4832 /*
4833  * Local variables:
4834  *  c-basic-offset: 8
4835  * End:
4836  */