err.no Git - 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 nfs_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 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define owner_id_maxsz          (1 + 1)
  74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define op_encode_hdr_maxsz     (1)
  77 #define op_decode_hdr_maxsz     (2)
  78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  79                                 (NFS4_FHSIZE >> 2))
  80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  85                                 ((3+NFS4_FHSIZE) >> 2))
  86 #define nfs4_fattr_bitmap_maxsz 3
  87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  90 /* This is based on getfattr, which uses the most attributes: */
  91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
  93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  94                                 nfs4_fattr_value_maxsz)
  95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
  97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
  98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
  99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 104 #define encode_setclientid_maxsz \
 105                                 (op_encode_hdr_maxsz + \
 106                                 4 /*server->ip_addr*/ + \
 107                                 1 /*Netid*/ + \
 108                                 6 /*uaddr*/ + \
 109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 110 #define decode_setclientid_maxsz \
 111                                 (op_decode_hdr_maxsz + \
 112                                 2 + \
 113                                 1024) /* large value for CLID_INUSE */
 114 #define encode_setclientid_confirm_maxsz \
 115                                 (op_encode_hdr_maxsz + \
 116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 117 #define decode_setclientid_confirm_maxsz \
 118                                 (op_decode_hdr_maxsz)
 119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 122                                 nfs4_name_maxsz)
 123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 124                                 2 * nfs4_name_maxsz)
 125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 127                                 nfs4_name_maxsz)
 128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 130                                 1 + nfs4_name_maxsz + \
 131                                 nfs4_path_maxsz + \
 132                                 nfs4_fattr_maxsz)
 133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 135                                 2 + nfs4_name_maxsz + \
 136                                 nfs4_fattr_maxsz)
 137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 143                                 encode_putfh_maxsz + \
 144                                 op_encode_hdr_maxsz + 7)
 145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 146                                 decode_putfh_maxsz + \
 147                                 op_decode_hdr_maxsz + 2)
 148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 149                                 encode_putfh_maxsz + \
 150                                 op_encode_hdr_maxsz)
 151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 152                                 decode_putfh_maxsz + \
 153                                 op_decode_hdr_maxsz)
 154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 155                                 encode_putfh_maxsz + \
 156                                 op_encode_hdr_maxsz + 9)
 157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 158                                 decode_putfh_maxsz + \
 159                                 op_decode_hdr_maxsz + 2)
 160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 161                                 encode_putfh_maxsz + \
 162                                 op_encode_hdr_maxsz + 8 + \
 163                                 encode_getattr_maxsz)
 164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 165                                 decode_putfh_maxsz + \
 166                                 op_decode_hdr_maxsz + 4 + \
 167                                 decode_getattr_maxsz)
 168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 169                                 encode_putfh_maxsz + \
 170                                 op_encode_hdr_maxsz + 3 + \
 171                                 encode_getattr_maxsz)
 172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 173                                 decode_putfh_maxsz + \
 174                                 op_decode_hdr_maxsz + 2 + \
 175                                 decode_getattr_maxsz)
 176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 177                                 encode_putfh_maxsz + \
 178                                 op_encode_hdr_maxsz + \
 179                                 13 + 3 + 2 + 64 + \
 180                                 encode_getattr_maxsz + \
 181                                 encode_getfh_maxsz)
 182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 183                                 decode_putfh_maxsz + \
 184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 185                                 decode_getattr_maxsz + \
 186                                 decode_getfh_maxsz)
 187 #define NFS4_enc_open_confirm_sz      \
 188                                 (compound_encode_hdr_maxsz + \
 189                                 encode_putfh_maxsz + \
 190                                 op_encode_hdr_maxsz + 5)
 191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 192                                         decode_putfh_maxsz + \
 193                                         op_decode_hdr_maxsz + 4)
 194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 195                                         encode_putfh_maxsz + \
 196                                         op_encode_hdr_maxsz + \
 197                                         11)
 198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 199                                         decode_putfh_maxsz + \
 200                                         op_decode_hdr_maxsz + \
 201                                         4 + 5 + 2 + 3)
 202 #define NFS4_enc_open_downgrade_sz \
 203                                 (compound_encode_hdr_maxsz + \
 204                                 encode_putfh_maxsz + \
 205                                 op_encode_hdr_maxsz + 7 + \
 206                                 encode_getattr_maxsz)
 207 #define NFS4_dec_open_downgrade_sz \
 208                                 (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 op_decode_hdr_maxsz + 4 + \
 211                                 decode_getattr_maxsz)
 212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 213                                 encode_putfh_maxsz + \
 214                                 op_encode_hdr_maxsz + 5 + \
 215                                 encode_getattr_maxsz)
 216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 217                                 decode_putfh_maxsz + \
 218                                 op_decode_hdr_maxsz + 4 + \
 219                                 decode_getattr_maxsz)
 220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 221                                 encode_putfh_maxsz + \
 222                                 op_encode_hdr_maxsz + 4 + \
 223                                 nfs4_fattr_maxsz + \
 224                                 encode_getattr_maxsz)
 225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 226                                 decode_putfh_maxsz + \
 227                                 op_decode_hdr_maxsz + 3)
 228 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 229                                 encode_putfh_maxsz + \
 230                                 encode_fsinfo_maxsz)
 231 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 232                                 decode_putfh_maxsz + \
 233                                 decode_fsinfo_maxsz)
 234 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 235                                 encode_renew_maxsz)
 236 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 237                                 decode_renew_maxsz)
 238 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 239                                 encode_setclientid_maxsz)
 240 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 241                                 decode_setclientid_maxsz)
 242 #define NFS4_enc_setclientid_confirm_sz \
 243                                 (compound_encode_hdr_maxsz + \
 244                                 encode_setclientid_confirm_maxsz + \
 245                                 encode_putrootfh_maxsz + \
 246                                 encode_fsinfo_maxsz)
 247 #define NFS4_dec_setclientid_confirm_sz \
 248                                 (compound_decode_hdr_maxsz + \
 249                                 decode_setclientid_confirm_maxsz + \
 250                                 decode_putrootfh_maxsz + \
 251                                 decode_fsinfo_maxsz)
 252 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 253                                 encode_putfh_maxsz + \
 254                                 encode_getattr_maxsz + \
 255                                 op_encode_hdr_maxsz + \
 256                                 1 + 1 + 2 + 2 + \
 257                                 1 + 4 + 1 + 2 + \
 258                                 owner_id_maxsz)
 259 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 260                                 decode_putfh_maxsz + \
 261                                 decode_getattr_maxsz + \
 262                                 op_decode_hdr_maxsz + \
 263                                 2 + 2 + 1 + 2 + \
 264                                 owner_id_maxsz)
 265 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 266                                 encode_putfh_maxsz + \
 267                                 encode_getattr_maxsz + \
 268                                 op_encode_hdr_maxsz + \
 269                                 1 + 2 + 2 + 2 + \
 270                                 owner_id_maxsz)
 271 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 272 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 273                                 encode_putfh_maxsz + \
 274                                 encode_getattr_maxsz + \
 275                                 op_encode_hdr_maxsz + \
 276                                 1 + 1 + 4 + 2 + 2)
 277 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 278                                 decode_putfh_maxsz + \
 279                                 decode_getattr_maxsz + \
 280                                 op_decode_hdr_maxsz + 4)
 281 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 282                                 encode_putfh_maxsz + \
 283                                 op_encode_hdr_maxsz + 1)
 284 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 op_decode_hdr_maxsz + 2)
 287 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 288                                 encode_putfh_maxsz + \
 289                                 encode_getattr_maxsz)
 290 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 291                                 decode_putfh_maxsz + \
 292                                 decode_getattr_maxsz)
 293 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 294                                 encode_putfh_maxsz + \
 295                                 encode_lookup_maxsz + \
 296                                 encode_getattr_maxsz + \
 297                                 encode_getfh_maxsz)
 298 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 299                                 decode_putfh_maxsz + \
 300                                 op_decode_hdr_maxsz + \
 301                                 decode_getattr_maxsz + \
 302                                 decode_getfh_maxsz)
 303 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 304                                 encode_putrootfh_maxsz + \
 305                                 encode_getattr_maxsz + \
 306                                 encode_getfh_maxsz)
 307 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 308                                 decode_putrootfh_maxsz + \
 309                                 decode_getattr_maxsz + \
 310                                 decode_getfh_maxsz)
 311 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_remove_maxsz + \
 314                                 encode_getattr_maxsz)
 315 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 op_decode_hdr_maxsz + 5 + \
 318                                 decode_getattr_maxsz)
 319 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_savefh_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_rename_maxsz + \
 324                                 encode_getattr_maxsz + \
 325                                 encode_restorefh_maxsz + \
 326                                 encode_getattr_maxsz)
 327 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 328                                 decode_putfh_maxsz + \
 329                                 decode_savefh_maxsz + \
 330                                 decode_putfh_maxsz + \
 331                                 decode_rename_maxsz + \
 332                                 decode_getattr_maxsz + \
 333                                 decode_restorefh_maxsz + \
 334                                 decode_getattr_maxsz)
 335 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_savefh_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_link_maxsz + \
 340                                 decode_getattr_maxsz + \
 341                                 encode_restorefh_maxsz + \
 342                                 decode_getattr_maxsz)
 343 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 344                                 decode_putfh_maxsz + \
 345                                 decode_savefh_maxsz + \
 346                                 decode_putfh_maxsz + \
 347                                 decode_link_maxsz + \
 348                                 decode_getattr_maxsz + \
 349                                 decode_restorefh_maxsz + \
 350                                 decode_getattr_maxsz)
 351 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_symlink_maxsz + \
 354                                 encode_getattr_maxsz + \
 355                                 encode_getfh_maxsz)
 356 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 357                                 decode_putfh_maxsz + \
 358                                 decode_symlink_maxsz + \
 359                                 decode_getattr_maxsz + \
 360                                 decode_getfh_maxsz)
 361 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_savefh_maxsz + \
 364                                 encode_create_maxsz + \
 365                                 encode_getfh_maxsz + \
 366                                 encode_getattr_maxsz + \
 367                                 encode_restorefh_maxsz + \
 368                                 encode_getattr_maxsz)
 369 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 370                                 decode_putfh_maxsz + \
 371                                 decode_savefh_maxsz + \
 372                                 decode_create_maxsz + \
 373                                 decode_getfh_maxsz + \
 374                                 decode_getattr_maxsz + \
 375                                 decode_restorefh_maxsz + \
 376                                 decode_getattr_maxsz)
 377 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_getattr_maxsz)
 380 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_getattr_maxsz)
 383 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_getattr_maxsz)
 386 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 op_decode_hdr_maxsz + 12)
 389 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 390                                 encode_getattr_maxsz)
 391 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_delegreturn_maxsz)
 396 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 397                                 decode_delegreturn_maxsz)
 398 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 399                                 encode_putfh_maxsz + \
 400                                 encode_getattr_maxsz)
 401 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 402                                 decode_putfh_maxsz + \
 403                                 op_decode_hdr_maxsz + \
 404                                 nfs4_fattr_bitmap_maxsz + 1)
 405 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 406                                 encode_putfh_maxsz + \
 407                                 op_encode_hdr_maxsz + 4 + \
 408                                 nfs4_fattr_bitmap_maxsz + 1)
 409 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 410                                 decode_putfh_maxsz + \
 411                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 412
 413 static struct {
 414         unsigned int    mode;
 415         unsigned int    nfs2type;
 416 } nfs_type2fmt[] = {
 417         { 0,            NFNON        },
 418         { S_IFREG,      NFREG        },
 419         { S_IFDIR,      NFDIR        },
 420         { S_IFBLK,      NFBLK        },
 421         { S_IFCHR,      NFCHR        },
 422         { S_IFLNK,      NFLNK        },
 423         { S_IFSOCK,     NFSOCK       },
 424         { S_IFIFO,      NFFIFO       },
 425         { 0,            NFNON        },
 426         { 0,            NFNON        },
 427 };
 428
 429 struct compound_hdr {
 430         int32_t         status;
 431         uint32_t        nops;
 432         uint32_t        taglen;
 433         char *          tag;
 434 };
 435
 436 /*
 437  * START OF "GENERIC" ENCODE ROUTINES.
 438  *   These may look a little ugly since they are imported from a "generic"
 439  * set of XDR encode/decode routines which are intended to be shared by
 440  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 441  *
 442  * If the pain of reading these is too great, it should be a straightforward
 443  * task to translate them into Linux-specific versions which are more
 444  * consistent with the style used in NFSv2/v3...
 445  */
 446 #define WRITE32(n)               *p++ = htonl(n)
 447 #define WRITE64(n)               do {                           \
 448         *p++ = htonl((uint32_t)((n) >> 32));                            \
 449         *p++ = htonl((uint32_t)(n));                                    \
 450 } while (0)
 451 #define WRITEMEM(ptr,nbytes)     do {                           \
 452         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 453 } while (0)
 454
 455 #define RESERVE_SPACE(nbytes)   do {                            \
 456         p = xdr_reserve_space(xdr, nbytes);                     \
 457         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 458         BUG_ON(!p);                                             \
 459 } while (0)
 460
 461 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 462 {
 463         uint32_t *p;
 464
 465         p = xdr_reserve_space(xdr, 4 + len);
 466         BUG_ON(p == NULL);
 467         xdr_encode_opaque(p, str, len);
 468 }
 469
 470 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 471 {
 472         uint32_t *p;
 473
 474         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 475         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 476         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 477         WRITE32(hdr->taglen);
 478         WRITEMEM(hdr->tag, hdr->taglen);
 479         WRITE32(NFS4_MINOR_VERSION);
 480         WRITE32(hdr->nops);
 481         return 0;
 482 }
 483
 484 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 485 {
 486         uint32_t *p;
 487
 488         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 489         BUG_ON(p == NULL);
 490         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 491 }
 492
 493 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 494 {
 495         char owner_name[IDMAP_NAMESZ];
 496         char owner_group[IDMAP_NAMESZ];
 497         int owner_namelen = 0;
 498         int owner_grouplen = 0;
 499         uint32_t *p;
 500         uint32_t *q;
 501         int len;
 502         uint32_t bmval0 = 0;
 503         uint32_t bmval1 = 0;
 504         int status;
 505
 506         /*
 507          * We reserve enough space to write the entire attribute buffer at once.
 508          * In the worst-case, this would be
 509          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 510          *          = 36 bytes, plus any contribution from variable-length fields
 511          *            such as owner/group.
 512          */
 513         len = 16;
 514
 515         /* Sigh */
 516         if (iap->ia_valid & ATTR_SIZE)
 517                 len += 8;
 518         if (iap->ia_valid & ATTR_MODE)
 519                 len += 4;
 520         if (iap->ia_valid & ATTR_UID) {
 521                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
 522                 if (owner_namelen < 0) {
 523                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 524                                iap->ia_uid);
 525                         /* XXX */
 526                         strcpy(owner_name, "nobody");
 527                         owner_namelen = sizeof("nobody") - 1;
 528                         /* goto out; */
 529                 }
 530                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 531         }
 532         if (iap->ia_valid & ATTR_GID) {
 533                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
 534                 if (owner_grouplen < 0) {
 535                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 536                                iap->ia_gid);
 537                         strcpy(owner_group, "nobody");
 538                         owner_grouplen = sizeof("nobody") - 1;
 539                         /* goto out; */
 540                 }
 541                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 542         }
 543         if (iap->ia_valid & ATTR_ATIME_SET)
 544                 len += 16;
 545         else if (iap->ia_valid & ATTR_ATIME)
 546                 len += 4;
 547         if (iap->ia_valid & ATTR_MTIME_SET)
 548                 len += 16;
 549         else if (iap->ia_valid & ATTR_MTIME)
 550                 len += 4;
 551         RESERVE_SPACE(len);
 552
 553         /*
 554          * We write the bitmap length now, but leave the bitmap and the attribute
 555          * buffer length to be backfilled at the end of this routine.
 556          */
 557         WRITE32(2);
 558         q = p;
 559         p += 3;
 560
 561         if (iap->ia_valid & ATTR_SIZE) {
 562                 bmval0 |= FATTR4_WORD0_SIZE;
 563                 WRITE64(iap->ia_size);
 564         }
 565         if (iap->ia_valid & ATTR_MODE) {
 566                 bmval1 |= FATTR4_WORD1_MODE;
 567                 WRITE32(iap->ia_mode);
 568         }
 569         if (iap->ia_valid & ATTR_UID) {
 570                 bmval1 |= FATTR4_WORD1_OWNER;
 571                 WRITE32(owner_namelen);
 572                 WRITEMEM(owner_name, owner_namelen);
 573         }
 574         if (iap->ia_valid & ATTR_GID) {
 575                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 576                 WRITE32(owner_grouplen);
 577                 WRITEMEM(owner_group, owner_grouplen);
 578         }
 579         if (iap->ia_valid & ATTR_ATIME_SET) {
 580                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 581                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 582                 WRITE32(0);
 583                 WRITE32(iap->ia_mtime.tv_sec);
 584                 WRITE32(iap->ia_mtime.tv_nsec);
 585         }
 586         else if (iap->ia_valid & ATTR_ATIME) {
 587                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 588                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 589         }
 590         if (iap->ia_valid & ATTR_MTIME_SET) {
 591                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 592                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 593                 WRITE32(0);
 594                 WRITE32(iap->ia_mtime.tv_sec);
 595                 WRITE32(iap->ia_mtime.tv_nsec);
 596         }
 597         else if (iap->ia_valid & ATTR_MTIME) {
 598                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 599                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 600         }
 601
 602         /*
 603          * Now we backfill the bitmap and the attribute buffer length.
 604          */
 605         if (len != ((char *)p - (char *)q) + 4) {
 606                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 607                                 len, ((char *)p - (char *)q) + 4);
 608                 BUG();
 609         }
 610         len = (char *)p - (char *)q - 12;
 611         *q++ = htonl(bmval0);
 612         *q++ = htonl(bmval1);
 613         *q++ = htonl(len);
 614
 615         status = 0;
 616 /* out: */
 617         return status;
 618 }
 619
 620 static int encode_access(struct xdr_stream *xdr, u32 access)
 621 {
 622         uint32_t *p;
 623
 624         RESERVE_SPACE(8);
 625         WRITE32(OP_ACCESS);
 626         WRITE32(access);
 627
 628         return 0;
 629 }
 630
 631 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 632 {
 633         uint32_t *p;
 634
 635         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 636         WRITE32(OP_CLOSE);
 637         WRITE32(arg->seqid->sequence->counter);
 638         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 639
 640         return 0;
 641 }
 642
 643 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 644 {
 645         uint32_t *p;
 646
 647         RESERVE_SPACE(16);
 648         WRITE32(OP_COMMIT);
 649         WRITE64(args->offset);
 650         WRITE32(args->count);
 651
 652         return 0;
 653 }
 654
 655 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 656 {
 657         uint32_t *p;
 658
 659         RESERVE_SPACE(8);
 660         WRITE32(OP_CREATE);
 661         WRITE32(create->ftype);
 662
 663         switch (create->ftype) {
 664         case NF4LNK:
 665                 RESERVE_SPACE(4 + create->u.symlink->len);
 666                 WRITE32(create->u.symlink->len);
 667                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
 668                 break;
 669
 670         case NF4BLK: case NF4CHR:
 671                 RESERVE_SPACE(8);
 672                 WRITE32(create->u.device.specdata1);
 673                 WRITE32(create->u.device.specdata2);
 674                 break;
 675
 676         default:
 677                 break;
 678         }
 679
 680         RESERVE_SPACE(4 + create->name->len);
 681         WRITE32(create->name->len);
 682         WRITEMEM(create->name->name, create->name->len);
 683
 684         return encode_attrs(xdr, create->attrs, create->server);
 685 }
 686
 687 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 688 {
 689         uint32_t *p;
 690
 691         RESERVE_SPACE(12);
 692         WRITE32(OP_GETATTR);
 693         WRITE32(1);
 694         WRITE32(bitmap);
 695         return 0;
 696 }
 697
 698 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 699 {
 700         uint32_t *p;
 701
 702         RESERVE_SPACE(16);
 703         WRITE32(OP_GETATTR);
 704         WRITE32(2);
 705         WRITE32(bm0);
 706         WRITE32(bm1);
 707         return 0;
 708 }
 709
 710 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 711 {
 712         return encode_getattr_two(xdr,
 713                         bitmask[0] & nfs4_fattr_bitmap[0],
 714                         bitmask[1] & nfs4_fattr_bitmap[1]);
 715 }
 716
 717 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 718 {
 719         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 720                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 721 }
 722
 723 static int encode_getfh(struct xdr_stream *xdr)
 724 {
 725         uint32_t *p;
 726
 727         RESERVE_SPACE(4);
 728         WRITE32(OP_GETFH);
 729
 730         return 0;
 731 }
 732
 733 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 734 {
 735         uint32_t *p;
 736
 737         RESERVE_SPACE(8 + name->len);
 738         WRITE32(OP_LINK);
 739         WRITE32(name->len);
 740         WRITEMEM(name->name, name->len);
 741
 742         return 0;
 743 }
 744
 745 /*
 746  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 747  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 748  */
 749 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 750 {
 751         uint32_t *p;
 752         struct nfs_lock_opargs *opargs = arg->u.lock;
 753
 754         RESERVE_SPACE(32);
 755         WRITE32(OP_LOCK);
 756         WRITE32(arg->type);
 757         WRITE32(opargs->reclaim);
 758         WRITE64(arg->offset);
 759         WRITE64(arg->length);
 760         WRITE32(opargs->new_lock_owner);
 761         if (opargs->new_lock_owner){
 762                 RESERVE_SPACE(40);
 763                 WRITE32(opargs->open_seqid->sequence->counter);
 764                 WRITEMEM(opargs->open_stateid->data, sizeof(opargs->open_stateid->data));
 765                 WRITE32(opargs->lock_seqid->sequence->counter);
 766                 WRITE64(opargs->lock_owner.clientid);
 767                 WRITE32(4);
 768                 WRITE32(opargs->lock_owner.id);
 769         }
 770         else {
 771                 RESERVE_SPACE(20);
 772                 WRITEMEM(opargs->lock_stateid->data, sizeof(opargs->lock_stateid->data));
 773                 WRITE32(opargs->lock_seqid->sequence->counter);
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 780 {
 781         uint32_t *p;
 782         struct nfs_lowner *opargs = arg->u.lockt;
 783
 784         RESERVE_SPACE(40);
 785         WRITE32(OP_LOCKT);
 786         WRITE32(arg->type);
 787         WRITE64(arg->offset);
 788         WRITE64(arg->length);
 789         WRITE64(opargs->clientid);
 790         WRITE32(4);
 791         WRITE32(opargs->id);
 792
 793         return 0;
 794 }
 795
 796 static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 797 {
 798         uint32_t *p;
 799         struct nfs_locku_opargs *opargs = arg->u.locku;
 800
 801         RESERVE_SPACE(44);
 802         WRITE32(OP_LOCKU);
 803         WRITE32(arg->type);
 804         WRITE32(opargs->seqid->sequence->counter);
 805         WRITEMEM(opargs->stateid->data, sizeof(opargs->stateid->data));
 806         WRITE64(arg->offset);
 807         WRITE64(arg->length);
 808
 809         return 0;
 810 }
 811
 812 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 813 {
 814         int len = name->len;
 815         uint32_t *p;
 816
 817         RESERVE_SPACE(8 + len);
 818         WRITE32(OP_LOOKUP);
 819         WRITE32(len);
 820         WRITEMEM(name->name, len);
 821
 822         return 0;
 823 }
 824
 825 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 826 {
 827         uint32_t *p;
 828
 829         RESERVE_SPACE(8);
 830         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 831                 case FMODE_READ:
 832                         WRITE32(NFS4_SHARE_ACCESS_READ);
 833                         break;
 834                 case FMODE_WRITE:
 835                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 836                         break;
 837                 case FMODE_READ|FMODE_WRITE:
 838                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 839                         break;
 840                 default:
 841                         BUG();
 842         }
 843         WRITE32(0);             /* for linux, share_deny = 0 always */
 844 }
 845
 846 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 847 {
 848         uint32_t *p;
 849  /*
 850  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 851  * owner 4 = 32
 852  */
 853         RESERVE_SPACE(8);
 854         WRITE32(OP_OPEN);
 855         WRITE32(arg->seqid->sequence->counter);
 856         encode_share_access(xdr, arg->open_flags);
 857         RESERVE_SPACE(16);
 858         WRITE64(arg->clientid);
 859         WRITE32(4);
 860         WRITE32(arg->id);
 861 }
 862
 863 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 864 {
 865         uint32_t *p;
 866
 867         RESERVE_SPACE(4);
 868         switch(arg->open_flags & O_EXCL) {
 869                 case 0:
 870                         WRITE32(NFS4_CREATE_UNCHECKED);
 871                         encode_attrs(xdr, arg->u.attrs, arg->server);
 872                         break;
 873                 default:
 874                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 875                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 876         }
 877 }
 878
 879 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 880 {
 881         uint32_t *p;
 882
 883         RESERVE_SPACE(4);
 884         switch (arg->open_flags & O_CREAT) {
 885                 case 0:
 886                         WRITE32(NFS4_OPEN_NOCREATE);
 887                         break;
 888                 default:
 889                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 890                         WRITE32(NFS4_OPEN_CREATE);
 891                         encode_createmode(xdr, arg);
 892         }
 893 }
 894
 895 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 896 {
 897         uint32_t *p;
 898
 899         RESERVE_SPACE(4);
 900         switch (delegation_type) {
 901                 case 0:
 902                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 903                         break;
 904                 case FMODE_READ:
 905                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 906                         break;
 907                 case FMODE_WRITE|FMODE_READ:
 908                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 909                         break;
 910                 default:
 911                         BUG();
 912         }
 913 }
 914
 915 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 916 {
 917         uint32_t *p;
 918
 919         RESERVE_SPACE(4);
 920         WRITE32(NFS4_OPEN_CLAIM_NULL);
 921         encode_string(xdr, name->len, name->name);
 922 }
 923
 924 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 925 {
 926         uint32_t *p;
 927
 928         RESERVE_SPACE(4);
 929         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 930         encode_delegation_type(xdr, type);
 931 }
 932
 933 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 934 {
 935         uint32_t *p;
 936
 937         RESERVE_SPACE(4+sizeof(stateid->data));
 938         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 939         WRITEMEM(stateid->data, sizeof(stateid->data));
 940         encode_string(xdr, name->len, name->name);
 941 }
 942
 943 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 944 {
 945         encode_openhdr(xdr, arg);
 946         encode_opentype(xdr, arg);
 947         switch (arg->claim) {
 948                 case NFS4_OPEN_CLAIM_NULL:
 949                         encode_claim_null(xdr, arg->name);
 950                         break;
 951                 case NFS4_OPEN_CLAIM_PREVIOUS:
 952                         encode_claim_previous(xdr, arg->u.delegation_type);
 953                         break;
 954                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 955                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 956                         break;
 957                 default:
 958                         BUG();
 959         }
 960         return 0;
 961 }
 962
 963 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 964 {
 965         uint32_t *p;
 966
 967         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 968         WRITE32(OP_OPEN_CONFIRM);
 969         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 970         WRITE32(arg->seqid->sequence->counter);
 971
 972         return 0;
 973 }
 974
 975 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 976 {
 977         uint32_t *p;
 978
 979         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 980         WRITE32(OP_OPEN_DOWNGRADE);
 981         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 982         WRITE32(arg->seqid->sequence->counter);
 983         encode_share_access(xdr, arg->open_flags);
 984         return 0;
 985 }
 986
 987 static int
 988 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
 989 {
 990         int len = fh->size;
 991         uint32_t *p;
 992
 993         RESERVE_SPACE(8 + len);
 994         WRITE32(OP_PUTFH);
 995         WRITE32(len);
 996         WRITEMEM(fh->data, len);
 997
 998         return 0;
 999 }
1000
1001 static int encode_putrootfh(struct xdr_stream *xdr)
1002 {
1003         uint32_t *p;
1004
1005         RESERVE_SPACE(4);
1006         WRITE32(OP_PUTROOTFH);
1007
1008         return 0;
1009 }
1010
1011 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1012 {
1013         nfs4_stateid stateid;
1014         uint32_t *p;
1015
1016         RESERVE_SPACE(16);
1017         if (ctx->state != NULL) {
1018                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1019                 WRITEMEM(stateid.data, sizeof(stateid.data));
1020         } else
1021                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1022 }
1023
1024 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1025 {
1026         uint32_t *p;
1027
1028         RESERVE_SPACE(4);
1029         WRITE32(OP_READ);
1030
1031         encode_stateid(xdr, args->context);
1032
1033         RESERVE_SPACE(12);
1034         WRITE64(args->offset);
1035         WRITE32(args->count);
1036
1037         return 0;
1038 }
1039
1040 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1041 {
1042         struct rpc_auth *auth = req->rq_task->tk_auth;
1043         uint32_t attrs[2] = {
1044                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1045                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1046         };
1047         int replen;
1048         uint32_t *p;
1049
1050         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1051         WRITE32(OP_READDIR);
1052         WRITE64(readdir->cookie);
1053         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1054         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1055         WRITE32(readdir->count);
1056         WRITE32(2);
1057         /* Switch to mounted_on_fileid if the server supports it */
1058         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1059                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1060         else
1061                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1062         WRITE32(attrs[0] & readdir->bitmask[0]);
1063         WRITE32(attrs[1] & readdir->bitmask[1]);
1064         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1065                         __FUNCTION__,
1066                         (unsigned long long)readdir->cookie,
1067                         ((u32 *)readdir->verifier.data)[0],
1068                         ((u32 *)readdir->verifier.data)[1],
1069                         attrs[0] & readdir->bitmask[0],
1070                         attrs[1] & readdir->bitmask[1]);
1071
1072         /* set up reply kvec
1073          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1074          *      + OP_READDIR + status + verifer(2)  = 9
1075          */
1076         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1077         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1078                          readdir->pgbase, readdir->count);
1079         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1080                         __FUNCTION__, replen, readdir->pages,
1081                         readdir->pgbase, readdir->count);
1082
1083         return 0;
1084 }
1085
1086 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1087 {
1088         struct rpc_auth *auth = req->rq_task->tk_auth;
1089         unsigned int replen;
1090         uint32_t *p;
1091
1092         RESERVE_SPACE(4);
1093         WRITE32(OP_READLINK);
1094
1095         /* set up reply kvec
1096          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1097          *      + OP_READLINK + status + string length = 8
1098          */
1099         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1100         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1101                         readlink->pgbase, readlink->pglen);
1102
1103         return 0;
1104 }
1105
1106 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1107 {
1108         uint32_t *p;
1109
1110         RESERVE_SPACE(8 + name->len);
1111         WRITE32(OP_REMOVE);
1112         WRITE32(name->len);
1113         WRITEMEM(name->name, name->len);
1114
1115         return 0;
1116 }
1117
1118 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1119 {
1120         uint32_t *p;
1121
1122         RESERVE_SPACE(8 + oldname->len);
1123         WRITE32(OP_RENAME);
1124         WRITE32(oldname->len);
1125         WRITEMEM(oldname->name, oldname->len);
1126
1127         RESERVE_SPACE(4 + newname->len);
1128         WRITE32(newname->len);
1129         WRITEMEM(newname->name, newname->len);
1130
1131         return 0;
1132 }
1133
1134 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1135 {
1136         uint32_t *p;
1137
1138         RESERVE_SPACE(12);
1139         WRITE32(OP_RENEW);
1140         WRITE64(client_stateid->cl_clientid);
1141
1142         return 0;
1143 }
1144
1145 static int
1146 encode_restorefh(struct xdr_stream *xdr)
1147 {
1148         uint32_t *p;
1149
1150         RESERVE_SPACE(4);
1151         WRITE32(OP_RESTOREFH);
1152
1153         return 0;
1154 }
1155
1156 static int
1157 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1158 {
1159         uint32_t *p;
1160
1161         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1162         WRITE32(OP_SETATTR);
1163         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1164         RESERVE_SPACE(2*4);
1165         WRITE32(1);
1166         WRITE32(FATTR4_WORD0_ACL);
1167         if (arg->acl_len % 4)
1168                 return -EINVAL;
1169         RESERVE_SPACE(4);
1170         WRITE32(arg->acl_len);
1171         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1172         return 0;
1173 }
1174
1175 static int
1176 encode_savefh(struct xdr_stream *xdr)
1177 {
1178         uint32_t *p;
1179
1180         RESERVE_SPACE(4);
1181         WRITE32(OP_SAVEFH);
1182
1183         return 0;
1184 }
1185
1186 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1187 {
1188         int status;
1189         uint32_t *p;
1190
1191         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1192         WRITE32(OP_SETATTR);
1193         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1194
1195         if ((status = encode_attrs(xdr, arg->iap, server)))
1196                 return status;
1197
1198         return 0;
1199 }
1200
1201 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1202 {
1203         uint32_t *p;
1204
1205         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1206         WRITE32(OP_SETCLIENTID);
1207         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1208
1209         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1210         RESERVE_SPACE(4);
1211         WRITE32(setclientid->sc_prog);
1212         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1213         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1214         RESERVE_SPACE(4);
1215         WRITE32(setclientid->sc_cb_ident);
1216
1217         return 0;
1218 }
1219
1220 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1221 {
1222         uint32_t *p;
1223
1224         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1225         WRITE32(OP_SETCLIENTID_CONFIRM);
1226         WRITE64(client_state->cl_clientid);
1227         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1228
1229         return 0;
1230 }
1231
1232 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1233 {
1234         uint32_t *p;
1235
1236         RESERVE_SPACE(4);
1237         WRITE32(OP_WRITE);
1238
1239         encode_stateid(xdr, args->context);
1240
1241         RESERVE_SPACE(16);
1242         WRITE64(args->offset);
1243         WRITE32(args->stable);
1244         WRITE32(args->count);
1245
1246         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1247
1248         return 0;
1249 }
1250
1251 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1252 {
1253         uint32_t *p;
1254
1255         RESERVE_SPACE(20);
1256
1257         WRITE32(OP_DELEGRETURN);
1258         WRITEMEM(stateid->data, sizeof(stateid->data));
1259         return 0;
1260
1261 }
1262 /*
1263  * END OF "GENERIC" ENCODE ROUTINES.
1264  */
1265
1266 /*
1267  * Encode an ACCESS request
1268  */
1269 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1270 {
1271         struct xdr_stream xdr;
1272         struct compound_hdr hdr = {
1273                 .nops = 2,
1274         };
1275         int status;
1276
1277         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1278         encode_compound_hdr(&xdr, &hdr);
1279         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1280                 status = encode_access(&xdr, args->access);
1281         return status;
1282 }
1283
1284 /*
1285  * Encode LOOKUP request
1286  */
1287 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1288 {
1289         struct xdr_stream xdr;
1290         struct compound_hdr hdr = {
1291                 .nops = 4,
1292         };
1293         int status;
1294
1295         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1296         encode_compound_hdr(&xdr, &hdr);
1297         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1298                 goto out;
1299         if ((status = encode_lookup(&xdr, args->name)) != 0)
1300                 goto out;
1301         if ((status = encode_getfh(&xdr)) != 0)
1302                 goto out;
1303         status = encode_getfattr(&xdr, args->bitmask);
1304 out:
1305         return status;
1306 }
1307
1308 /*
1309  * Encode LOOKUP_ROOT request
1310  */
1311 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1312 {
1313         struct xdr_stream xdr;
1314         struct compound_hdr hdr = {
1315                 .nops = 3,
1316         };
1317         int status;
1318
1319         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1320         encode_compound_hdr(&xdr, &hdr);
1321         if ((status = encode_putrootfh(&xdr)) != 0)
1322                 goto out;
1323         if ((status = encode_getfh(&xdr)) == 0)
1324                 status = encode_getfattr(&xdr, args->bitmask);
1325 out:
1326         return status;
1327 }
1328
1329 /*
1330  * Encode REMOVE request
1331  */
1332 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1333 {
1334         struct xdr_stream xdr;
1335         struct compound_hdr hdr = {
1336                 .nops = 3,
1337         };
1338         int status;
1339
1340         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1341         encode_compound_hdr(&xdr, &hdr);
1342         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1343                 goto out;
1344         if ((status = encode_remove(&xdr, args->name)) != 0)
1345                 goto out;
1346         status = encode_getfattr(&xdr, args->bitmask);
1347 out:
1348         return status;
1349 }
1350
1351 /*
1352  * Encode RENAME request
1353  */
1354 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1355 {
1356         struct xdr_stream xdr;
1357         struct compound_hdr hdr = {
1358                 .nops = 7,
1359         };
1360         int status;
1361
1362         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1363         encode_compound_hdr(&xdr, &hdr);
1364         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1365                 goto out;
1366         if ((status = encode_savefh(&xdr)) != 0)
1367                 goto out;
1368         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1369                 goto out;
1370         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1371                 goto out;
1372         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1373                 goto out;
1374         if ((status = encode_restorefh(&xdr)) != 0)
1375                 goto out;
1376         status = encode_getfattr(&xdr, args->bitmask);
1377 out:
1378         return status;
1379 }
1380
1381 /*
1382  * Encode LINK request
1383  */
1384 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1385 {
1386         struct xdr_stream xdr;
1387         struct compound_hdr hdr = {
1388                 .nops = 7,
1389         };
1390         int status;
1391
1392         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1393         encode_compound_hdr(&xdr, &hdr);
1394         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1395                 goto out;
1396         if ((status = encode_savefh(&xdr)) != 0)
1397                 goto out;
1398         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1399                 goto out;
1400         if ((status = encode_link(&xdr, args->name)) != 0)
1401                 goto out;
1402         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1403                 goto out;
1404         if ((status = encode_restorefh(&xdr)) != 0)
1405                 goto out;
1406         status = encode_getfattr(&xdr, args->bitmask);
1407 out:
1408         return status;
1409 }
1410
1411 /*
1412  * Encode CREATE request
1413  */
1414 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1415 {
1416         struct xdr_stream xdr;
1417         struct compound_hdr hdr = {
1418                 .nops = 7,
1419         };
1420         int status;
1421
1422         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1423         encode_compound_hdr(&xdr, &hdr);
1424         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1425                 goto out;
1426         if ((status = encode_savefh(&xdr)) != 0)
1427                 goto out;
1428         if ((status = encode_create(&xdr, args)) != 0)
1429                 goto out;
1430         if ((status = encode_getfh(&xdr)) != 0)
1431                 goto out;
1432         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1433                 goto out;
1434         if ((status = encode_restorefh(&xdr)) != 0)
1435                 goto out;
1436         status = encode_getfattr(&xdr, args->bitmask);
1437 out:
1438         return status;
1439 }
1440
1441 /*
1442  * Encode SYMLINK request
1443  */
1444 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1445 {
1446         return nfs4_xdr_enc_create(req, p, args);
1447 }
1448
1449 /*
1450  * Encode GETATTR request
1451  */
1452 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1453 {
1454         struct xdr_stream xdr;
1455         struct compound_hdr hdr = {
1456                 .nops = 2,
1457         };
1458         int status;
1459
1460         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1461         encode_compound_hdr(&xdr, &hdr);
1462         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1463                 status = encode_getfattr(&xdr, args->bitmask);
1464         return status;
1465 }
1466
1467 /*
1468  * Encode a CLOSE request
1469  */
1470 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1471 {
1472         struct xdr_stream xdr;
1473         struct compound_hdr hdr = {
1474                 .nops   = 3,
1475         };
1476         int status;
1477
1478         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1479         encode_compound_hdr(&xdr, &hdr);
1480         status = encode_putfh(&xdr, args->fh);
1481         if(status)
1482                 goto out;
1483         status = encode_close(&xdr, args);
1484         if (status != 0)
1485                 goto out;
1486         status = encode_getfattr(&xdr, args->bitmask);
1487 out:
1488         return status;
1489 }
1490
1491 /*
1492  * Encode an OPEN request
1493  */
1494 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1495 {
1496         struct xdr_stream xdr;
1497         struct compound_hdr hdr = {
1498                 .nops = 7,
1499         };
1500         int status;
1501
1502         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1503         encode_compound_hdr(&xdr, &hdr);
1504         status = encode_putfh(&xdr, args->fh);
1505         if (status)
1506                 goto out;
1507         status = encode_savefh(&xdr);
1508         if (status)
1509                 goto out;
1510         status = encode_open(&xdr, args);
1511         if (status)
1512                 goto out;
1513         status = encode_getfh(&xdr);
1514         if (status)
1515                 goto out;
1516         status = encode_getfattr(&xdr, args->bitmask);
1517         if (status)
1518                 goto out;
1519         status = encode_restorefh(&xdr);
1520         if (status)
1521                 goto out;
1522         status = encode_getfattr(&xdr, args->bitmask);
1523 out:
1524         return status;
1525 }
1526
1527 /*
1528  * Encode an OPEN_CONFIRM request
1529  */
1530 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1531 {
1532         struct xdr_stream xdr;
1533         struct compound_hdr hdr = {
1534                 .nops   = 2,
1535         };
1536         int status;
1537
1538         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1539         encode_compound_hdr(&xdr, &hdr);
1540         status = encode_putfh(&xdr, args->fh);
1541         if(status)
1542                 goto out;
1543         status = encode_open_confirm(&xdr, args);
1544 out:
1545         return status;
1546 }
1547
1548 /*
1549  * Encode an OPEN request with no attributes.
1550  */
1551 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1552 {
1553         struct xdr_stream xdr;
1554         struct compound_hdr hdr = {
1555                 .nops   = 2,
1556         };
1557         int status;
1558
1559         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1560         if (status != 0)
1561                 goto out;
1562         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1563         encode_compound_hdr(&xdr, &hdr);
1564         status = encode_putfh(&xdr, args->fh);
1565         if (status)
1566                 goto out;
1567         status = encode_open(&xdr, args);
1568 out:
1569         return status;
1570 }
1571
1572 /*
1573  * Encode an OPEN_DOWNGRADE request
1574  */
1575 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1576 {
1577         struct xdr_stream xdr;
1578         struct compound_hdr hdr = {
1579                 .nops   = 3,
1580         };
1581         int status;
1582
1583         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1584         encode_compound_hdr(&xdr, &hdr);
1585         status = encode_putfh(&xdr, args->fh);
1586         if (status)
1587                 goto out;
1588         status = encode_open_downgrade(&xdr, args);
1589         if (status != 0)
1590                 goto out;
1591         status = encode_getfattr(&xdr, args->bitmask);
1592 out:
1593         return status;
1594 }
1595
1596 /*
1597  * Encode a LOCK request
1598  */
1599 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1600 {
1601         struct xdr_stream xdr;
1602         struct compound_hdr hdr = {
1603                 .nops   = 2,
1604         };
1605         struct nfs_lock_opargs *opargs = args->u.lock;
1606         int status;
1607
1608         status = nfs_wait_on_sequence(opargs->lock_seqid, req->rq_task);
1609         if (status != 0)
1610                 goto out;
1611         /* Do we need to do an open_to_lock_owner? */
1612         if (opargs->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)
1613                 opargs->new_lock_owner = 0;
1614         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1615         encode_compound_hdr(&xdr, &hdr);
1616         status = encode_putfh(&xdr, args->fh);
1617         if(status)
1618                 goto out;
1619         status = encode_lock(&xdr, args);
1620 out:
1621         return status;
1622 }
1623
1624 /*
1625  * Encode a LOCKT request
1626  */
1627 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1628 {
1629         struct xdr_stream xdr;
1630         struct compound_hdr hdr = {
1631                 .nops   = 2,
1632         };
1633         int status;
1634
1635         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1636         encode_compound_hdr(&xdr, &hdr);
1637         status = encode_putfh(&xdr, args->fh);
1638         if(status)
1639                 goto out;
1640         status = encode_lockt(&xdr, args);
1641 out:
1642         return status;
1643 }
1644
1645 /*
1646  * Encode a LOCKU request
1647  */
1648 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1649 {
1650         struct xdr_stream xdr;
1651         struct compound_hdr hdr = {
1652                 .nops   = 2,
1653         };
1654         int status;
1655
1656         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1657         encode_compound_hdr(&xdr, &hdr);
1658         status = encode_putfh(&xdr, args->fh);
1659         if(status)
1660                 goto out;
1661         status = encode_locku(&xdr, args);
1662 out:
1663         return status;
1664 }
1665
1666 /*
1667  * Encode a READLINK request
1668  */
1669 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1670 {
1671         struct xdr_stream xdr;
1672         struct compound_hdr hdr = {
1673                 .nops = 2,
1674         };
1675         int status;
1676
1677         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1678         encode_compound_hdr(&xdr, &hdr);
1679         status = encode_putfh(&xdr, args->fh);
1680         if(status)
1681                 goto out;
1682         status = encode_readlink(&xdr, args, req);
1683 out:
1684         return status;
1685 }
1686
1687 /*
1688  * Encode a READDIR request
1689  */
1690 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1691 {
1692         struct xdr_stream xdr;
1693         struct compound_hdr hdr = {
1694                 .nops = 2,
1695         };
1696         int status;
1697
1698         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1699         encode_compound_hdr(&xdr, &hdr);
1700         status = encode_putfh(&xdr, args->fh);
1701         if(status)
1702                 goto out;
1703         status = encode_readdir(&xdr, args, req);
1704 out:
1705         return status;
1706 }
1707
1708 /*
1709  * Encode a READ request
1710  */
1711 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1712 {
1713         struct rpc_auth *auth = req->rq_task->tk_auth;
1714         struct xdr_stream xdr;
1715         struct compound_hdr hdr = {
1716                 .nops = 2,
1717         };
1718         int replen, status;
1719
1720         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1721         encode_compound_hdr(&xdr, &hdr);
1722         status = encode_putfh(&xdr, args->fh);
1723         if (status)
1724                 goto out;
1725         status = encode_read(&xdr, args);
1726         if (status)
1727                 goto out;
1728
1729         /* set up reply kvec
1730          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1731          *       + OP_READ + status + eof + datalen = 9
1732          */
1733         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1734         xdr_inline_pages(&req->rq_rcv_buf, replen,
1735                          args->pages, args->pgbase, args->count);
1736 out:
1737         return status;
1738 }
1739
1740 /*
1741  * Encode an SETATTR request
1742  */
1743 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1744
1745 {
1746         struct xdr_stream xdr;
1747         struct compound_hdr hdr = {
1748                 .nops   = 3,
1749         };
1750         int status;
1751
1752         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1753         encode_compound_hdr(&xdr, &hdr);
1754         status = encode_putfh(&xdr, args->fh);
1755         if(status)
1756                 goto out;
1757         status = encode_setattr(&xdr, args, args->server);
1758         if(status)
1759                 goto out;
1760         status = encode_getfattr(&xdr, args->bitmask);
1761 out:
1762         return status;
1763 }
1764
1765 /*
1766  * Encode a GETACL request
1767  */
1768 static int
1769 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1770                 struct nfs_getaclargs *args)
1771 {
1772         struct xdr_stream xdr;
1773         struct rpc_auth *auth = req->rq_task->tk_auth;
1774         struct compound_hdr hdr = {
1775                 .nops   = 2,
1776         };
1777         int replen, status;
1778
1779         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1780         encode_compound_hdr(&xdr, &hdr);
1781         status = encode_putfh(&xdr, args->fh);
1782         if (status)
1783                 goto out;
1784         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1785         /* set up reply buffer: */
1786         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1787         xdr_inline_pages(&req->rq_rcv_buf, replen,
1788                 args->acl_pages, args->acl_pgbase, args->acl_len);
1789 out:
1790         return status;
1791 }
1792
1793 /*
1794  * Encode a WRITE request
1795  */
1796 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1797 {
1798         struct xdr_stream xdr;
1799         struct compound_hdr hdr = {
1800                 .nops = 3,
1801         };
1802         int status;
1803
1804         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805         encode_compound_hdr(&xdr, &hdr);
1806         status = encode_putfh(&xdr, args->fh);
1807         if (status)
1808                 goto out;
1809         status = encode_write(&xdr, args);
1810         if (status)
1811                 goto out;
1812         status = encode_getfattr(&xdr, args->bitmask);
1813 out:
1814         return status;
1815 }
1816
1817 /*
1818  *  a COMMIT request
1819  */
1820 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1821 {
1822         struct xdr_stream xdr;
1823         struct compound_hdr hdr = {
1824                 .nops = 3,
1825         };
1826         int status;
1827
1828         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1829         encode_compound_hdr(&xdr, &hdr);
1830         status = encode_putfh(&xdr, args->fh);
1831         if (status)
1832                 goto out;
1833         status = encode_commit(&xdr, args);
1834         if (status)
1835                 goto out;
1836         status = encode_getfattr(&xdr, args->bitmask);
1837 out:
1838         return status;
1839 }
1840
1841 /*
1842  * FSINFO request
1843  */
1844 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1845 {
1846         struct xdr_stream xdr;
1847         struct compound_hdr hdr = {
1848                 .nops   = 2,
1849         };
1850         int status;
1851
1852         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1853         encode_compound_hdr(&xdr, &hdr);
1854         status = encode_putfh(&xdr, args->fh);
1855         if (!status)
1856                 status = encode_fsinfo(&xdr, args->bitmask);
1857         return status;
1858 }
1859
1860 /*
1861  * a PATHCONF request
1862  */
1863 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1864 {
1865         struct xdr_stream xdr;
1866         struct compound_hdr hdr = {
1867                 .nops = 2,
1868         };
1869         int status;
1870
1871         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1872         encode_compound_hdr(&xdr, &hdr);
1873         status = encode_putfh(&xdr, args->fh);
1874         if (!status)
1875                 status = encode_getattr_one(&xdr,
1876                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1877         return status;
1878 }
1879
1880 /*
1881  * a STATFS request
1882  */
1883 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1884 {
1885         struct xdr_stream xdr;
1886         struct compound_hdr hdr = {
1887                 .nops = 2,
1888         };
1889         int status;
1890
1891         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1892         encode_compound_hdr(&xdr, &hdr);
1893         status = encode_putfh(&xdr, args->fh);
1894         if (status == 0)
1895                 status = encode_getattr_two(&xdr,
1896                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1897                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1898         return status;
1899 }
1900
1901 /*
1902  * GETATTR_BITMAP request
1903  */
1904 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1905 {
1906         struct xdr_stream xdr;
1907         struct compound_hdr hdr = {
1908                 .nops = 2,
1909         };
1910         int status;
1911
1912         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1913         encode_compound_hdr(&xdr, &hdr);
1914         status = encode_putfh(&xdr, fhandle);
1915         if (status == 0)
1916                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1917                                 FATTR4_WORD0_LINK_SUPPORT|
1918                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1919                                 FATTR4_WORD0_ACLSUPPORT);
1920         return status;
1921 }
1922
1923 /*
1924  * a RENEW request
1925  */
1926 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1927 {
1928         struct xdr_stream xdr;
1929         struct compound_hdr hdr = {
1930                 .nops   = 1,
1931         };
1932
1933         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1934         encode_compound_hdr(&xdr, &hdr);
1935         return encode_renew(&xdr, clp);
1936 }
1937
1938 /*
1939  * a SETCLIENTID request
1940  */
1941 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1942 {
1943         struct xdr_stream xdr;
1944         struct compound_hdr hdr = {
1945                 .nops   = 1,
1946         };
1947
1948         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949         encode_compound_hdr(&xdr, &hdr);
1950         return encode_setclientid(&xdr, sc);
1951 }
1952
1953 /*
1954  * a SETCLIENTID_CONFIRM request
1955  */
1956 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1957 {
1958         struct xdr_stream xdr;
1959         struct compound_hdr hdr = {
1960                 .nops   = 3,
1961         };
1962         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1963         int status;
1964
1965         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966         encode_compound_hdr(&xdr, &hdr);
1967         status = encode_setclientid_confirm(&xdr, clp);
1968         if (!status)
1969                 status = encode_putrootfh(&xdr);
1970         if (!status)
1971                 status = encode_fsinfo(&xdr, lease_bitmap);
1972         return status;
1973 }
1974
1975 /*
1976  * DELEGRETURN request
1977  */
1978 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1979 {
1980         struct xdr_stream xdr;
1981         struct compound_hdr hdr = {
1982                 .nops = 2,
1983         };
1984         int status;
1985
1986         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1987         encode_compound_hdr(&xdr, &hdr);
1988         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1989                 status = encode_delegreturn(&xdr, args->stateid);
1990         return status;
1991 }
1992
1993 /*
1994  * START OF "GENERIC" DECODE ROUTINES.
1995  *   These may look a little ugly since they are imported from a "generic"
1996  * set of XDR encode/decode routines which are intended to be shared by
1997  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1998  *
1999  * If the pain of reading these is too great, it should be a straightforward
2000  * task to translate them into Linux-specific versions which are more
2001  * consistent with the style used in NFSv2/v3...
2002  */
2003 #define READ32(x)         (x) = ntohl(*p++)
2004 #define READ64(x)         do {                  \
2005         (x) = (u64)ntohl(*p++) << 32;           \
2006         (x) |= ntohl(*p++);                     \
2007 } while (0)
2008 #define READTIME(x)       do {                  \
2009         p++;                                    \
2010         (x.tv_sec) = ntohl(*p++);               \
2011         (x.tv_nsec) = ntohl(*p++);              \
2012 } while (0)
2013 #define COPYMEM(x,nbytes) do {                  \
2014         memcpy((x), p, nbytes);                 \
2015         p += XDR_QUADLEN(nbytes);               \
2016 } while (0)
2017
2018 #define READ_BUF(nbytes)  do { \
2019         p = xdr_inline_decode(xdr, nbytes); \
2020         if (!p) { \
2021                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2022                                 __FUNCTION__, __LINE__); \
2023                 return -EIO; \
2024         } \
2025 } while (0)
2026
2027 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
2028 {
2029         uint32_t *p;
2030
2031         READ_BUF(4);
2032         READ32(*len);
2033         READ_BUF(*len);
2034         *string = (char *)p;
2035         return 0;
2036 }
2037
2038 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2039 {
2040         uint32_t *p;
2041
2042         READ_BUF(8);
2043         READ32(hdr->status);
2044         READ32(hdr->taglen);
2045
2046         READ_BUF(hdr->taglen + 4);
2047         hdr->tag = (char *)p;
2048         p += XDR_QUADLEN(hdr->taglen);
2049         READ32(hdr->nops);
2050         return 0;
2051 }
2052
2053 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2054 {
2055         uint32_t *p;
2056         uint32_t opnum;
2057         int32_t nfserr;
2058
2059         READ_BUF(8);
2060         READ32(opnum);
2061         if (opnum != expected) {
2062                 printk(KERN_NOTICE
2063                                 "nfs4_decode_op_hdr: Server returned operation"
2064                                 " %d but we issued a request for %d\n",
2065                                 opnum, expected);
2066                 return -EIO;
2067         }
2068         READ32(nfserr);
2069         if (nfserr != NFS_OK)
2070                 return -nfs_stat_to_errno(nfserr);
2071         return 0;
2072 }
2073
2074 /* Dummy routine */
2075 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2076 {
2077         uint32_t *p;
2078         uint32_t strlen;
2079         char *str;
2080
2081         READ_BUF(12);
2082         return decode_opaque_inline(xdr, &strlen, &str);
2083 }
2084
2085 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2086 {
2087         uint32_t bmlen, *p;
2088
2089         READ_BUF(4);
2090         READ32(bmlen);
2091
2092         bitmap[0] = bitmap[1] = 0;
2093         READ_BUF((bmlen << 2));
2094         if (bmlen > 0) {
2095                 READ32(bitmap[0]);
2096                 if (bmlen > 1)
2097                         READ32(bitmap[1]);
2098         }
2099         return 0;
2100 }
2101
2102 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2103 {
2104         uint32_t *p;
2105
2106         READ_BUF(4);
2107         READ32(*attrlen);
2108         *savep = xdr->p;
2109         return 0;
2110 }
2111
2112 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2113 {
2114         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2115                 decode_attr_bitmap(xdr, bitmask);
2116                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2117         } else
2118                 bitmask[0] = bitmask[1] = 0;
2119         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2120         return 0;
2121 }
2122
2123 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2124 {
2125         uint32_t *p;
2126
2127         *type = 0;
2128         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2129                 return -EIO;
2130         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2131                 READ_BUF(4);
2132                 READ32(*type);
2133                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2134                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2135                         return -EIO;
2136                 }
2137                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2138         }
2139         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2140         return 0;
2141 }
2142
2143 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2144 {
2145         uint32_t *p;
2146
2147         *change = 0;
2148         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2149                 return -EIO;
2150         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2151                 READ_BUF(8);
2152                 READ64(*change);
2153                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2154         }
2155         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2156                         (unsigned long long)*change);
2157         return 0;
2158 }
2159
2160 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2161 {
2162         uint32_t *p;
2163
2164         *size = 0;
2165         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2166                 return -EIO;
2167         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2168                 READ_BUF(8);
2169                 READ64(*size);
2170                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2171         }
2172         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2173         return 0;
2174 }
2175
2176 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2177 {
2178         uint32_t *p;
2179
2180         *res = 0;
2181         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2182                 return -EIO;
2183         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2184                 READ_BUF(4);
2185                 READ32(*res);
2186                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2187         }
2188         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2189         return 0;
2190 }
2191
2192 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2193 {
2194         uint32_t *p;
2195
2196         *res = 0;
2197         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2198                 return -EIO;
2199         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2200                 READ_BUF(4);
2201                 READ32(*res);
2202                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2203         }
2204         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2205         return 0;
2206 }
2207
2208 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2209 {
2210         uint32_t *p;
2211
2212         fsid->major = 0;
2213         fsid->minor = 0;
2214         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2215                 return -EIO;
2216         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2217                 READ_BUF(16);
2218                 READ64(fsid->major);
2219                 READ64(fsid->minor);
2220                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2221         }
2222         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2223                         (unsigned long long)fsid->major,
2224                         (unsigned long long)fsid->minor);
2225         return 0;
2226 }
2227
2228 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2229 {
2230         uint32_t *p;
2231
2232         *res = 60;
2233         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2234                 return -EIO;
2235         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2236                 READ_BUF(4);
2237                 READ32(*res);
2238                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2239         }
2240         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2241         return 0;
2242 }
2243
2244 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2245 {
2246         uint32_t *p;
2247
2248         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2249         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2250                 return -EIO;
2251         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2252                 READ_BUF(4);
2253                 READ32(*res);
2254                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2255         }
2256         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2257         return 0;
2258 }
2259
2260 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2261 {
2262         uint32_t *p;
2263
2264         *fileid = 0;
2265         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2266                 return -EIO;
2267         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2268                 READ_BUF(8);
2269                 READ64(*fileid);
2270                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2271         }
2272         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2273         return 0;
2274 }
2275
2276 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2277 {
2278         uint32_t *p;
2279         int status = 0;
2280
2281         *res = 0;
2282         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2283                 return -EIO;
2284         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2285                 READ_BUF(8);
2286                 READ64(*res);
2287                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2288         }
2289         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2290         return status;
2291 }
2292
2293 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2294 {
2295         uint32_t *p;
2296         int status = 0;
2297
2298         *res = 0;
2299         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2300                 return -EIO;
2301         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2302                 READ_BUF(8);
2303                 READ64(*res);
2304                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2305         }
2306         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2307         return status;
2308 }
2309
2310 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2311 {
2312         uint32_t *p;
2313         int status = 0;
2314
2315         *res = 0;
2316         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2317                 return -EIO;
2318         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2319                 READ_BUF(8);
2320                 READ64(*res);
2321                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2322         }
2323         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2324         return status;
2325 }
2326
2327 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2328 {
2329         uint32_t *p;
2330         int status = 0;
2331
2332         *res = 0;
2333         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2334                 return -EIO;
2335         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2336                 READ_BUF(8);
2337                 READ64(*res);
2338                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2339         }
2340         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2341         return status;
2342 }
2343
2344 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2345 {
2346         uint32_t *p;
2347         int status = 0;
2348
2349         *maxlink = 1;
2350         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2351                 return -EIO;
2352         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2353                 READ_BUF(4);
2354                 READ32(*maxlink);
2355                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2356         }
2357         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2358         return status;
2359 }
2360
2361 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2362 {
2363         uint32_t *p;
2364         int status = 0;
2365
2366         *maxname = 1024;
2367         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2368                 return -EIO;
2369         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2370                 READ_BUF(4);
2371                 READ32(*maxname);
2372                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2373         }
2374         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2375         return status;
2376 }
2377
2378 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2379 {
2380         uint32_t *p;
2381         int status = 0;
2382
2383         *res = 1024;
2384         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2385                 return -EIO;
2386         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2387                 uint64_t maxread;
2388                 READ_BUF(8);
2389                 READ64(maxread);
2390                 if (maxread > 0x7FFFFFFF)
2391                         maxread = 0x7FFFFFFF;
2392                 *res = (uint32_t)maxread;
2393                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2394         }
2395         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2396         return status;
2397 }
2398
2399 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2400 {
2401         uint32_t *p;
2402         int status = 0;
2403
2404         *res = 1024;
2405         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2406                 return -EIO;
2407         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2408                 uint64_t maxwrite;
2409                 READ_BUF(8);
2410                 READ64(maxwrite);
2411                 if (maxwrite > 0x7FFFFFFF)
2412                         maxwrite = 0x7FFFFFFF;
2413                 *res = (uint32_t)maxwrite;
2414                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2415         }
2416         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2417         return status;
2418 }
2419
2420 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2421 {
2422         uint32_t *p;
2423
2424         *mode = 0;
2425         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2426                 return -EIO;
2427         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2428                 READ_BUF(4);
2429                 READ32(*mode);
2430                 *mode &= ~S_IFMT;
2431                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2432         }
2433         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2434         return 0;
2435 }
2436
2437 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2438 {
2439         uint32_t *p;
2440
2441         *nlink = 1;
2442         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2443                 return -EIO;
2444         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2445                 READ_BUF(4);
2446                 READ32(*nlink);
2447                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2448         }
2449         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2450         return 0;
2451 }
2452
2453 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2454 {
2455         uint32_t len, *p;
2456
2457         *uid = -2;
2458         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2459                 return -EIO;
2460         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2461                 READ_BUF(4);
2462                 READ32(len);
2463                 READ_BUF(len);
2464                 if (len < XDR_MAX_NETOBJ) {
2465                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2466                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2467                                                 __FUNCTION__);
2468                 } else
2469                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2470                                         __FUNCTION__, len);
2471                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2472         }
2473         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2474         return 0;
2475 }
2476
2477 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2478 {
2479         uint32_t len, *p;
2480
2481         *gid = -2;
2482         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2483                 return -EIO;
2484         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2485                 READ_BUF(4);
2486                 READ32(len);
2487                 READ_BUF(len);
2488                 if (len < XDR_MAX_NETOBJ) {
2489                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2490                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2491                                                 __FUNCTION__);
2492                 } else
2493                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2494                                         __FUNCTION__, len);
2495                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2496         }
2497         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2498         return 0;
2499 }
2500
2501 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2502 {
2503         uint32_t major = 0, minor = 0, *p;
2504
2505         *rdev = MKDEV(0,0);
2506         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2507                 return -EIO;
2508         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2509                 dev_t tmp;
2510
2511                 READ_BUF(8);
2512                 READ32(major);
2513                 READ32(minor);
2514                 tmp = MKDEV(major, minor);
2515                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2516                         *rdev = tmp;
2517                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2518         }
2519         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2520         return 0;
2521 }
2522
2523 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2524 {
2525         uint32_t *p;
2526         int status = 0;
2527
2528         *res = 0;
2529         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2530                 return -EIO;
2531         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2532                 READ_BUF(8);
2533                 READ64(*res);
2534                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2535         }
2536         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2537         return status;
2538 }
2539
2540 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2541 {
2542         uint32_t *p;
2543         int status = 0;
2544
2545         *res = 0;
2546         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2547                 return -EIO;
2548         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2549                 READ_BUF(8);
2550                 READ64(*res);
2551                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2552         }
2553         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2554         return status;
2555 }
2556
2557 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2558 {
2559         uint32_t *p;
2560         int status = 0;
2561
2562         *res = 0;
2563         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2564                 return -EIO;
2565         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2566                 READ_BUF(8);
2567                 READ64(*res);
2568                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2569         }
2570         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2571         return status;
2572 }
2573
2574 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2575 {
2576         uint32_t *p;
2577
2578         *used = 0;
2579         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2580                 return -EIO;
2581         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2582                 READ_BUF(8);
2583                 READ64(*used);
2584                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2585         }
2586         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2587                         (unsigned long long)*used);
2588         return 0;
2589 }
2590
2591 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2592 {
2593         uint32_t *p;
2594         uint64_t sec;
2595         uint32_t nsec;
2596
2597         READ_BUF(12);
2598         READ64(sec);
2599         READ32(nsec);
2600         time->tv_sec = (time_t)sec;
2601         time->tv_nsec = (long)nsec;
2602         return 0;
2603 }
2604
2605 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2606 {
2607         int status = 0;
2608
2609         time->tv_sec = 0;
2610         time->tv_nsec = 0;
2611         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2612                 return -EIO;
2613         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2614                 status = decode_attr_time(xdr, time);
2615                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2616         }
2617         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2618         return status;
2619 }
2620
2621 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2622 {
2623         int status = 0;
2624
2625         time->tv_sec = 0;
2626         time->tv_nsec = 0;
2627         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2628                 return -EIO;
2629         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2630                 status = decode_attr_time(xdr, time);
2631                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2632         }
2633         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2634         return status;
2635 }
2636
2637 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2638 {
2639         int status = 0;
2640
2641         time->tv_sec = 0;
2642         time->tv_nsec = 0;
2643         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2644                 return -EIO;
2645         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2646                 status = decode_attr_time(xdr, time);
2647                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2648         }
2649         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2650         return status;
2651 }
2652
2653 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2654 {
2655         unsigned int attrwords = XDR_QUADLEN(attrlen);
2656         unsigned int nwords = xdr->p - savep;
2657
2658         if (unlikely(attrwords != nwords)) {
2659                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2660                                 __FUNCTION__,
2661                                 attrwords << 2,
2662                                 (attrwords < nwords) ? '<' : '>',
2663                                 nwords << 2);
2664                 return -EIO;
2665         }
2666         return 0;
2667 }
2668
2669 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2670 {
2671         uint32_t *p;
2672
2673         READ_BUF(20);
2674         READ32(cinfo->atomic);
2675         READ64(cinfo->before);
2676         READ64(cinfo->after);
2677         return 0;
2678 }
2679
2680 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2681 {
2682         uint32_t *p;
2683         uint32_t supp, acc;
2684         int status;
2685
2686         status = decode_op_hdr(xdr, OP_ACCESS);
2687         if (status)
2688                 return status;
2689         READ_BUF(8);
2690         READ32(supp);
2691         READ32(acc);
2692         access->supported = supp;
2693         access->access = acc;
2694         return 0;
2695 }
2696
2697 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2698 {
2699         uint32_t *p;
2700         int status;
2701
2702         status = decode_op_hdr(xdr, OP_CLOSE);
2703         if (status)
2704                 return status;
2705         READ_BUF(sizeof(res->stateid.data));
2706         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2707         return 0;
2708 }
2709
2710 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2711 {
2712         uint32_t *p;
2713         int status;
2714
2715         status = decode_op_hdr(xdr, OP_COMMIT);
2716         if (status)
2717                 return status;
2718         READ_BUF(8);
2719         COPYMEM(res->verf->verifier, 8);
2720         return 0;
2721 }
2722
2723 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2724 {
2725         uint32_t *p;
2726         uint32_t bmlen;
2727         int status;
2728
2729         status = decode_op_hdr(xdr, OP_CREATE);
2730         if (status)
2731                 return status;
2732         if ((status = decode_change_info(xdr, cinfo)))
2733                 return status;
2734         READ_BUF(4);
2735         READ32(bmlen);
2736         READ_BUF(bmlen << 2);
2737         return 0;
2738 }
2739
2740 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2741 {
2742         uint32_t *savep;
2743         uint32_t attrlen,
2744                  bitmap[2] = {0};
2745         int status;
2746
2747         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2748                 goto xdr_error;
2749         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2750                 goto xdr_error;
2751         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2752                 goto xdr_error;
2753         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2754                 goto xdr_error;
2755         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2756                 goto xdr_error;
2757         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2758                 goto xdr_error;
2759         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2760                 goto xdr_error;
2761         status = verify_attr_len(xdr, savep, attrlen);
2762 xdr_error:
2763         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2764         return status;
2765 }
2766
2767 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2768 {
2769         uint32_t *savep;
2770         uint32_t attrlen,
2771                  bitmap[2] = {0};
2772         int status;
2773
2774         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2775                 goto xdr_error;
2776         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2777                 goto xdr_error;
2778         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2779                 goto xdr_error;
2780
2781         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2782                 goto xdr_error;
2783         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2784                 goto xdr_error;
2785         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2786                 goto xdr_error;
2787         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2788                 goto xdr_error;
2789         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2790                 goto xdr_error;
2791         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2792                 goto xdr_error;
2793
2794         status = verify_attr_len(xdr, savep, attrlen);
2795 xdr_error:
2796         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2797         return status;
2798 }
2799
2800 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2801 {
2802         uint32_t *savep;
2803         uint32_t attrlen,
2804                  bitmap[2] = {0};
2805         int status;
2806
2807         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2808                 goto xdr_error;
2809         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2810                 goto xdr_error;
2811         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2812                 goto xdr_error;
2813
2814         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2815                 goto xdr_error;
2816         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2817                 goto xdr_error;
2818
2819         status = verify_attr_len(xdr, savep, attrlen);
2820 xdr_error:
2821         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2822         return status;
2823 }
2824
2825 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2826 {
2827         uint32_t *savep;
2828         uint32_t attrlen,
2829                  bitmap[2] = {0},
2830                  type;
2831         int status, fmode = 0;
2832
2833         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2834                 goto xdr_error;
2835         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2836                 goto xdr_error;
2837
2838         fattr->bitmap[0] = bitmap[0];
2839         fattr->bitmap[1] = bitmap[1];
2840
2841         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2842                 goto xdr_error;
2843
2844
2845         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2846                 goto xdr_error;
2847         fattr->type = nfs_type2fmt[type].nfs2type;
2848         fmode = nfs_type2fmt[type].mode;
2849
2850         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2851                 goto xdr_error;
2852         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2853                 goto xdr_error;
2854         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2855                 goto xdr_error;
2856         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2857                 goto xdr_error;
2858         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2859                 goto xdr_error;
2860         fattr->mode |= fmode;
2861         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2862                 goto xdr_error;
2863         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2864                 goto xdr_error;
2865         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2866                 goto xdr_error;
2867         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2868                 goto xdr_error;
2869         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2870                 goto xdr_error;
2871         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2872                 goto xdr_error;
2873         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2876                 goto xdr_error;
2877         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2878                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2879 xdr_error:
2880         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2881         return status;
2882 }
2883
2884
2885 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2886 {
2887         uint32_t *savep;
2888         uint32_t attrlen, bitmap[2];
2889         int status;
2890
2891         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2892                 goto xdr_error;
2893         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2894                 goto xdr_error;
2895         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2896                 goto xdr_error;
2897
2898         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2899
2900         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2901                 goto xdr_error;
2902         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2903                 goto xdr_error;
2904         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2905                 goto xdr_error;
2906         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2907         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2908                 goto xdr_error;
2909         fsinfo->wtpref = fsinfo->wtmax;
2910
2911         status = verify_attr_len(xdr, savep, attrlen);
2912 xdr_error:
2913         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2914         return status;
2915 }
2916
2917 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2918 {
2919         uint32_t *p;
2920         uint32_t len;
2921         int status;
2922
2923         status = decode_op_hdr(xdr, OP_GETFH);
2924         if (status)
2925                 return status;
2926         /* Zero handle first to allow comparisons */
2927         memset(fh, 0, sizeof(*fh));
2928
2929         READ_BUF(4);
2930         READ32(len);
2931         if (len > NFS4_FHSIZE)
2932                 return -EIO;
2933         fh->size = len;
2934         READ_BUF(len);
2935         COPYMEM(fh->data, len);
2936         return 0;
2937 }
2938
2939 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2940 {
2941         int status;
2942
2943         status = decode_op_hdr(xdr, OP_LINK);
2944         if (status)
2945                 return status;
2946         return decode_change_info(xdr, cinfo);
2947 }
2948
2949 /*
2950  * We create the owner, so we know a proper owner.id length is 4.
2951  */
2952 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2953 {
2954         uint32_t *p;
2955         uint32_t namelen;
2956
2957         READ_BUF(32);
2958         READ64(denied->offset);
2959         READ64(denied->length);
2960         READ32(denied->type);
2961         READ64(denied->owner.clientid);
2962         READ32(namelen);
2963         READ_BUF(namelen);
2964         if (namelen == 4)
2965                 READ32(denied->owner.id);
2966         return -NFS4ERR_DENIED;
2967 }
2968
2969 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2970 {
2971         uint32_t *p;
2972         int status;
2973
2974         status = decode_op_hdr(xdr, OP_LOCK);
2975         if (status == 0) {
2976                 READ_BUF(sizeof(res->u.stateid.data));
2977                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
2978         } else if (status == -NFS4ERR_DENIED)
2979                 return decode_lock_denied(xdr, &res->u.denied);
2980         return status;
2981 }
2982
2983 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2984 {
2985         int status;
2986         status = decode_op_hdr(xdr, OP_LOCKT);
2987         if (status == -NFS4ERR_DENIED)
2988                 return decode_lock_denied(xdr, &res->u.denied);
2989         return status;
2990 }
2991
2992 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2993 {
2994         uint32_t *p;
2995         int status;
2996
2997         status = decode_op_hdr(xdr, OP_LOCKU);
2998         if (status == 0) {
2999                 READ_BUF(sizeof(res->u.stateid.data));
3000                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
3001         }
3002         return status;
3003 }
3004
3005 static int decode_lookup(struct xdr_stream *xdr)
3006 {
3007         return decode_op_hdr(xdr, OP_LOOKUP);
3008 }
3009
3010 /* This is too sick! */
3011 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3012 {
3013         uint32_t *p;
3014         uint32_t limit_type, nblocks, blocksize;
3015
3016         READ_BUF(12);
3017         READ32(limit_type);
3018         switch (limit_type) {
3019                 case 1:
3020                         READ64(*maxsize);
3021                         break;
3022                 case 2:
3023                         READ32(nblocks);
3024                         READ32(blocksize);
3025                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3026         }
3027         return 0;
3028 }
3029
3030 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3031 {
3032         uint32_t *p;
3033         uint32_t delegation_type;
3034
3035         READ_BUF(4);
3036         READ32(delegation_type);
3037         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3038                 res->delegation_type = 0;
3039                 return 0;
3040         }
3041         READ_BUF(20);
3042         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3043         READ32(res->do_recall);
3044         switch (delegation_type) {
3045                 case NFS4_OPEN_DELEGATE_READ:
3046                         res->delegation_type = FMODE_READ;
3047                         break;
3048                 case NFS4_OPEN_DELEGATE_WRITE:
3049                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3050                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3051                                 return -EIO;
3052         }
3053         return decode_ace(xdr, NULL, res->server->nfs4_state);
3054 }
3055
3056 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3057 {
3058         uint32_t *p;
3059         uint32_t bmlen;
3060         int status;
3061
3062         status = decode_op_hdr(xdr, OP_OPEN);
3063         if (status)
3064                 return status;
3065         READ_BUF(sizeof(res->stateid.data));
3066         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3067
3068         decode_change_info(xdr, &res->cinfo);
3069
3070         READ_BUF(8);
3071         READ32(res->rflags);
3072         READ32(bmlen);
3073         if (bmlen > 10)
3074                 goto xdr_error;
3075
3076         READ_BUF(bmlen << 2);
3077         p += bmlen;
3078         return decode_delegation(xdr, res);
3079 xdr_error:
3080         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3081         return -EIO;
3082 }
3083
3084 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3085 {
3086         uint32_t *p;
3087         int status;
3088
3089         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3090         if (status)
3091                 return status;
3092         READ_BUF(sizeof(res->stateid.data));
3093         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3094         return 0;
3095 }
3096
3097 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3098 {
3099         uint32_t *p;
3100         int status;
3101
3102         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3103         if (status)
3104                 return status;
3105         READ_BUF(sizeof(res->stateid.data));
3106         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3107         return 0;
3108 }
3109
3110 static int decode_putfh(struct xdr_stream *xdr)
3111 {
3112         return decode_op_hdr(xdr, OP_PUTFH);
3113 }
3114
3115 static int decode_putrootfh(struct xdr_stream *xdr)
3116 {
3117         return decode_op_hdr(xdr, OP_PUTROOTFH);
3118 }
3119
3120 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3121 {
3122         struct kvec *iov = req->rq_rcv_buf.head;
3123         uint32_t *p;
3124         uint32_t count, eof, recvd, hdrlen;
3125         int status;
3126
3127         status = decode_op_hdr(xdr, OP_READ);
3128         if (status)
3129                 return status;
3130         READ_BUF(8);
3131         READ32(eof);
3132         READ32(count);
3133         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3134         recvd = req->rq_rcv_buf.len - hdrlen;
3135         if (count > recvd) {
3136                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3137                                 "count %u > recvd %u\n", count, recvd);
3138                 count = recvd;
3139                 eof = 0;
3140         }
3141         xdr_read_pages(xdr, count);
3142         res->eof = eof;
3143         res->count = count;
3144         return 0;
3145 }
3146
3147 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3148 {
3149         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3150         struct page     *page = *rcvbuf->pages;
3151         struct kvec     *iov = rcvbuf->head;
3152         unsigned int    nr, pglen = rcvbuf->page_len;
3153         uint32_t        *end, *entry, *p, *kaddr;
3154         uint32_t        len, attrlen;
3155         int             hdrlen, recvd, status;
3156
3157         status = decode_op_hdr(xdr, OP_READDIR);
3158         if (status)
3159                 return status;
3160         READ_BUF(8);
3161         COPYMEM(readdir->verifier.data, 8);
3162         dprintk("%s: verifier = 0x%x%x\n",
3163                         __FUNCTION__,
3164                         ((u32 *)readdir->verifier.data)[0],
3165                         ((u32 *)readdir->verifier.data)[1]);
3166
3167
3168         hdrlen = (char *) p - (char *) iov->iov_base;
3169         recvd = rcvbuf->len - hdrlen;
3170         if (pglen > recvd)
3171                 pglen = recvd;
3172         xdr_read_pages(xdr, pglen);
3173
3174         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3175         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3176         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3177         entry = p;
3178         for (nr = 0; *p++; nr++) {
3179                 if (p + 3 > end)
3180                         goto short_pkt;
3181                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3182                 p += 2;                 /* cookie */
3183                 len = ntohl(*p++);      /* filename length */
3184                 if (len > NFS4_MAXNAMLEN) {
3185                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3186                         goto err_unmap;
3187                 }
3188                 dprintk("filename = %*s\n", len, (char *)p);
3189                 p += XDR_QUADLEN(len);
3190                 if (p + 1 > end)
3191                         goto short_pkt;
3192                 len = ntohl(*p++);      /* bitmap length */
3193                 p += len;
3194                 if (p + 1 > end)
3195                         goto short_pkt;
3196                 attrlen = XDR_QUADLEN(ntohl(*p++));
3197                 p += attrlen;           /* attributes */
3198                 if (p + 2 > end)
3199                         goto short_pkt;
3200                 entry = p;
3201         }
3202         if (!nr && (entry[0] != 0 || entry[1] == 0))
3203                 goto short_pkt;
3204 out:
3205         kunmap_atomic(kaddr, KM_USER0);
3206         return 0;
3207 short_pkt:
3208         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3209         entry[0] = entry[1] = 0;
3210         /* truncate listing ? */
3211         if (!nr) {
3212                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3213                 entry[1] = 1;
3214         }
3215         goto out;
3216 err_unmap:
3217         kunmap_atomic(kaddr, KM_USER0);
3218         return -errno_NFSERR_IO;
3219 }
3220
3221 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3222 {
3223         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3224         struct kvec *iov = rcvbuf->head;
3225         int hdrlen, len, recvd;
3226         uint32_t *p;
3227         char *kaddr;
3228         int status;
3229
3230         status = decode_op_hdr(xdr, OP_READLINK);
3231         if (status)
3232                 return status;
3233
3234         /* Convert length of symlink */
3235         READ_BUF(4);
3236         READ32(len);
3237         if (len >= rcvbuf->page_len || len <= 0) {
3238                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3239                 return -ENAMETOOLONG;
3240         }
3241         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3242         recvd = req->rq_rcv_buf.len - hdrlen;
3243         if (recvd < len) {
3244                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3245                                 "count %u > recvd %u\n", len, recvd);
3246                 return -EIO;
3247         }
3248         xdr_read_pages(xdr, len);
3249         /*
3250          * The XDR encode routine has set things up so that
3251          * the link text will be copied directly into the
3252          * buffer.  We just have to do overflow-checking,
3253          * and and null-terminate the text (the VFS expects
3254          * null-termination).
3255          */
3256         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3257         kaddr[len+rcvbuf->page_base] = '\0';
3258         kunmap_atomic(kaddr, KM_USER0);
3259         return 0;
3260 }
3261
3262 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3263 {
3264         int status;
3265
3266         status = decode_op_hdr(xdr, OP_REMOVE);
3267         if (status)
3268                 goto out;
3269         status = decode_change_info(xdr, cinfo);
3270 out:
3271         return status;
3272 }
3273
3274 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3275               struct nfs4_change_info *new_cinfo)
3276 {
3277         int status;
3278
3279         status = decode_op_hdr(xdr, OP_RENAME);
3280         if (status)
3281                 goto out;
3282         if ((status = decode_change_info(xdr, old_cinfo)))
3283                 goto out;
3284         status = decode_change_info(xdr, new_cinfo);
3285 out:
3286         return status;
3287 }
3288
3289 static int decode_renew(struct xdr_stream *xdr)
3290 {
3291         return decode_op_hdr(xdr, OP_RENEW);
3292 }
3293
3294 static int
3295 decode_restorefh(struct xdr_stream *xdr)
3296 {
3297         return decode_op_hdr(xdr, OP_RESTOREFH);
3298 }
3299
3300 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3301                 size_t *acl_len)
3302 {
3303         uint32_t *savep;
3304         uint32_t attrlen,
3305                  bitmap[2] = {0};
3306         struct kvec *iov = req->rq_rcv_buf.head;
3307         int status;
3308
3309         *acl_len = 0;
3310         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3311                 goto out;
3312         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3313                 goto out;
3314         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3315                 goto out;
3316
3317         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3318                 return -EIO;
3319         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3320                 int hdrlen, recvd;
3321
3322                 /* We ignore &savep and don't do consistency checks on
3323                  * the attr length.  Let userspace figure it out.... */
3324                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3325                 recvd = req->rq_rcv_buf.len - hdrlen;
3326                 if (attrlen > recvd) {
3327                         printk(KERN_WARNING "NFS: server cheating in getattr"
3328                                         " acl reply: attrlen %u > recvd %u\n",
3329                                         attrlen, recvd);
3330                         return -EINVAL;
3331                 }
3332                 if (attrlen <= *acl_len)
3333                         xdr_read_pages(xdr, attrlen);
3334                 *acl_len = attrlen;
3335         } else
3336                 status = -EOPNOTSUPP;
3337
3338 out:
3339         return status;
3340 }
3341
3342 static int
3343 decode_savefh(struct xdr_stream *xdr)
3344 {
3345         return decode_op_hdr(xdr, OP_SAVEFH);
3346 }
3347
3348 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3349 {
3350         uint32_t *p;
3351         uint32_t bmlen;
3352         int status;
3353
3354
3355         status = decode_op_hdr(xdr, OP_SETATTR);
3356         if (status)
3357                 return status;
3358         READ_BUF(4);
3359         READ32(bmlen);
3360         READ_BUF(bmlen << 2);
3361         return 0;
3362 }
3363
3364 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3365 {
3366         uint32_t *p;
3367         uint32_t opnum;
3368         int32_t nfserr;
3369
3370         READ_BUF(8);
3371         READ32(opnum);
3372         if (opnum != OP_SETCLIENTID) {
3373                 printk(KERN_NOTICE
3374                                 "nfs4_decode_setclientid: Server returned operation"
3375                                 " %d\n", opnum);
3376                 return -EIO;
3377         }
3378         READ32(nfserr);
3379         if (nfserr == NFS_OK) {
3380                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3381                 READ64(clp->cl_clientid);
3382                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3383         } else if (nfserr == NFSERR_CLID_INUSE) {
3384                 uint32_t len;
3385
3386                 /* skip netid string */
3387                 READ_BUF(4);
3388                 READ32(len);
3389                 READ_BUF(len);
3390
3391                 /* skip uaddr string */
3392                 READ_BUF(4);
3393                 READ32(len);
3394                 READ_BUF(len);
3395                 return -NFSERR_CLID_INUSE;
3396         } else
3397                 return -nfs_stat_to_errno(nfserr);
3398
3399         return 0;
3400 }
3401
3402 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3403 {
3404         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3405 }
3406
3407 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3408 {
3409         uint32_t *p;
3410         int status;
3411
3412         status = decode_op_hdr(xdr, OP_WRITE);
3413         if (status)
3414                 return status;
3415
3416         READ_BUF(16);
3417         READ32(res->count);
3418         READ32(res->verf->committed);
3419         COPYMEM(res->verf->verifier, 8);
3420         return 0;
3421 }
3422
3423 static int decode_delegreturn(struct xdr_stream *xdr)
3424 {
3425         return decode_op_hdr(xdr, OP_DELEGRETURN);
3426 }
3427
3428 /*
3429  * Decode OPEN_DOWNGRADE response
3430  */
3431 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3432 {
3433         struct xdr_stream xdr;
3434         struct compound_hdr hdr;
3435         int status;
3436
3437         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3438         status = decode_compound_hdr(&xdr, &hdr);
3439         if (status)
3440                 goto out;
3441         status = decode_putfh(&xdr);
3442         if (status)
3443                 goto out;
3444         status = decode_open_downgrade(&xdr, res);
3445         if (status != 0)
3446                 goto out;
3447         decode_getfattr(&xdr, res->fattr, res->server);
3448 out:
3449         return status;
3450 }
3451
3452 /*
3453  * END OF "GENERIC" DECODE ROUTINES.
3454  */
3455
3456 /*
3457  * Decode ACCESS response
3458  */
3459 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3460 {
3461         struct xdr_stream xdr;
3462         struct compound_hdr hdr;
3463         int status;
3464
3465         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3466         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3467                 goto out;
3468         if ((status = decode_putfh(&xdr)) == 0)
3469                 status = decode_access(&xdr, res);
3470 out:
3471         return status;
3472 }
3473
3474 /*
3475  * Decode LOOKUP response
3476  */
3477 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3478 {
3479         struct xdr_stream xdr;
3480         struct compound_hdr hdr;
3481         int status;
3482
3483         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3484         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3485                 goto out;
3486         if ((status = decode_putfh(&xdr)) != 0)
3487                 goto out;
3488         if ((status = decode_lookup(&xdr)) != 0)
3489                 goto out;
3490         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3491                 goto out;
3492         status = decode_getfattr(&xdr, res->fattr, res->server);
3493 out:
3494         return status;
3495 }
3496
3497 /*
3498  * Decode LOOKUP_ROOT response
3499  */
3500 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3501 {
3502         struct xdr_stream xdr;
3503         struct compound_hdr hdr;
3504         int status;
3505
3506         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3507         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3508                 goto out;
3509         if ((status = decode_putrootfh(&xdr)) != 0)
3510                 goto out;
3511         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3512                 status = decode_getfattr(&xdr, res->fattr, res->server);
3513 out:
3514         return status;
3515 }
3516
3517 /*
3518  * Decode REMOVE response
3519  */
3520 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3521 {
3522         struct xdr_stream xdr;
3523         struct compound_hdr hdr;
3524         int status;
3525
3526         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3527         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3528                 goto out;
3529         if ((status = decode_putfh(&xdr)) != 0)
3530                 goto out;
3531         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3532                 goto out;
3533         decode_getfattr(&xdr, res->dir_attr, res->server);
3534 out:
3535         return status;
3536 }
3537
3538 /*
3539  * Decode RENAME response
3540  */
3541 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3542 {
3543         struct xdr_stream xdr;
3544         struct compound_hdr hdr;
3545         int status;
3546
3547         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3548         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3549                 goto out;
3550         if ((status = decode_putfh(&xdr)) != 0)
3551                 goto out;
3552         if ((status = decode_savefh(&xdr)) != 0)
3553                 goto out;
3554         if ((status = decode_putfh(&xdr)) != 0)
3555                 goto out;
3556         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3557                 goto out;
3558         /* Current FH is target directory */
3559         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3560                 goto out;
3561         if ((status = decode_restorefh(&xdr)) != 0)
3562                 goto out;
3563         decode_getfattr(&xdr, res->old_fattr, res->server);
3564 out:
3565         return status;
3566 }
3567
3568 /*
3569  * Decode LINK response
3570  */
3571 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3572 {
3573         struct xdr_stream xdr;
3574         struct compound_hdr hdr;
3575         int status;
3576
3577         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3578         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3579                 goto out;
3580         if ((status = decode_putfh(&xdr)) != 0)
3581                 goto out;
3582         if ((status = decode_savefh(&xdr)) != 0)
3583                 goto out;
3584         if ((status = decode_putfh(&xdr)) != 0)
3585                 goto out;
3586         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3587                 goto out;
3588         /*
3589          * Note order: OP_LINK leaves the directory as the current
3590          *             filehandle.
3591          */
3592         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3593                 goto out;
3594         if ((status = decode_restorefh(&xdr)) != 0)
3595                 goto out;
3596         decode_getfattr(&xdr, res->fattr, res->server);
3597 out:
3598         return status;
3599 }
3600
3601 /*
3602  * Decode CREATE response
3603  */
3604 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3605 {
3606         struct xdr_stream xdr;
3607         struct compound_hdr hdr;
3608         int status;
3609
3610         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3611         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3612                 goto out;
3613         if ((status = decode_putfh(&xdr)) != 0)
3614                 goto out;
3615         if ((status = decode_savefh(&xdr)) != 0)
3616                 goto out;
3617         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3618                 goto out;
3619         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3620                 goto out;
3621         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3622                 goto out;
3623         if ((status = decode_restorefh(&xdr)) != 0)
3624                 goto out;
3625         decode_getfattr(&xdr, res->dir_fattr, res->server);
3626 out:
3627         return status;
3628 }
3629
3630 /*
3631  * Decode SYMLINK response
3632  */
3633 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3634 {
3635         return nfs4_xdr_dec_create(rqstp, p, res);
3636 }
3637
3638 /*
3639  * Decode GETATTR response
3640  */
3641 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3642 {
3643         struct xdr_stream xdr;
3644         struct compound_hdr hdr;
3645         int status;
3646
3647         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3648         status = decode_compound_hdr(&xdr, &hdr);
3649         if (status)
3650                 goto out;
3651         status = decode_putfh(&xdr);
3652         if (status)
3653                 goto out;
3654         status = decode_getfattr(&xdr, res->fattr, res->server);
3655 out:
3656         return status;
3657
3658 }
3659
3660 /*
3661  * Encode an SETACL request
3662  */
3663 static int
3664 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3665 {
3666         struct xdr_stream xdr;
3667         struct compound_hdr hdr = {
3668                 .nops   = 2,
3669         };
3670         int status;
3671
3672         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3673         encode_compound_hdr(&xdr, &hdr);
3674         status = encode_putfh(&xdr, args->fh);
3675         if (status)
3676                 goto out;
3677         status = encode_setacl(&xdr, args);
3678 out:
3679         return status;
3680 }
3681 /*
3682  * Decode SETACL response
3683  */
3684 static int
3685 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3686 {
3687         struct xdr_stream xdr;
3688         struct compound_hdr hdr;
3689         int status;
3690
3691         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3692         status = decode_compound_hdr(&xdr, &hdr);
3693         if (status)
3694                 goto out;
3695         status = decode_putfh(&xdr);
3696         if (status)
3697                 goto out;
3698         status = decode_setattr(&xdr, res);
3699 out:
3700         return status;
3701 }
3702
3703 /*
3704  * Decode GETACL response
3705  */
3706 static int
3707 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3708 {
3709         struct xdr_stream xdr;
3710         struct compound_hdr hdr;
3711         int status;
3712
3713         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3714         status = decode_compound_hdr(&xdr, &hdr);
3715         if (status)
3716                 goto out;
3717         status = decode_putfh(&xdr);
3718         if (status)
3719                 goto out;
3720         status = decode_getacl(&xdr, rqstp, acl_len);
3721
3722 out:
3723         return status;
3724 }
3725
3726 /*
3727  * Decode CLOSE response
3728  */
3729 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3730 {
3731         struct xdr_stream xdr;
3732         struct compound_hdr hdr;
3733         int status;
3734
3735         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3736         status = decode_compound_hdr(&xdr, &hdr);
3737         if (status)
3738                 goto out;
3739         status = decode_putfh(&xdr);
3740         if (status)
3741                 goto out;
3742         status = decode_close(&xdr, res);
3743         if (status != 0)
3744                 goto out;
3745         /*
3746          * Note: Server may do delete on close for this file
3747          *      in which case the getattr call will fail with
3748          *      an ESTALE error. Shouldn't be a problem,
3749          *      though, since fattr->valid will remain unset.
3750          */
3751         decode_getfattr(&xdr, res->fattr, res->server);
3752 out:
3753         return status;
3754 }
3755
3756 /*
3757  * Decode OPEN response
3758  */
3759 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3760 {
3761         struct xdr_stream xdr;
3762         struct compound_hdr hdr;
3763         int status;
3764
3765         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3766         status = decode_compound_hdr(&xdr, &hdr);
3767         if (status)
3768                 goto out;
3769         status = decode_putfh(&xdr);
3770         if (status)
3771                 goto out;
3772         status = decode_savefh(&xdr);
3773         if (status)
3774                 goto out;
3775         status = decode_open(&xdr, res);
3776         if (status)
3777                 goto out;
3778         status = decode_getfh(&xdr, &res->fh);
3779         if (status)
3780                 goto out;
3781         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3782                 goto out;
3783         if ((status = decode_restorefh(&xdr)) != 0)
3784                 goto out;
3785         decode_getfattr(&xdr, res->dir_attr, res->server);
3786 out:
3787         return status;
3788 }
3789
3790 /*
3791  * Decode OPEN_CONFIRM response
3792  */
3793 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3794 {
3795         struct xdr_stream xdr;
3796         struct compound_hdr hdr;
3797         int status;
3798
3799         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3800         status = decode_compound_hdr(&xdr, &hdr);
3801         if (status)
3802                 goto out;
3803         status = decode_putfh(&xdr);
3804         if (status)
3805                 goto out;
3806         status = decode_open_confirm(&xdr, res);
3807 out:
3808         return status;
3809 }
3810
3811 /*
3812  * Decode OPEN response
3813  */
3814 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3815 {
3816         struct xdr_stream xdr;
3817         struct compound_hdr hdr;
3818         int status;
3819
3820         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3821         status = decode_compound_hdr(&xdr, &hdr);
3822         if (status)
3823                 goto out;
3824         status = decode_putfh(&xdr);
3825         if (status)
3826                 goto out;
3827         status = decode_open(&xdr, res);
3828 out:
3829         return status;
3830 }
3831
3832 /*
3833  * Decode SETATTR response
3834  */
3835 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3836 {
3837         struct xdr_stream xdr;
3838         struct compound_hdr hdr;
3839         int status;
3840
3841         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3842         status = decode_compound_hdr(&xdr, &hdr);
3843         if (status)
3844                 goto out;
3845         status = decode_putfh(&xdr);
3846         if (status)
3847                 goto out;
3848         status = decode_setattr(&xdr, res);
3849         if (status)
3850                 goto out;
3851         status = decode_getfattr(&xdr, res->fattr, res->server);
3852         if (status == NFS4ERR_DELAY)
3853                 status = 0;
3854 out:
3855         return status;
3856 }
3857
3858 /*
3859  * Decode LOCK response
3860  */
3861 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3862 {
3863         struct xdr_stream xdr;
3864         struct compound_hdr hdr;
3865         int status;
3866
3867         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3868         status = decode_compound_hdr(&xdr, &hdr);
3869         if (status)
3870                 goto out;
3871         status = decode_putfh(&xdr);
3872         if (status)
3873                 goto out;
3874         status = decode_lock(&xdr, res);
3875 out:
3876         return status;
3877 }
3878
3879 /*
3880  * Decode LOCKT response
3881  */
3882 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3883 {
3884         struct xdr_stream xdr;
3885         struct compound_hdr hdr;
3886         int status;
3887
3888         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3889         status = decode_compound_hdr(&xdr, &hdr);
3890         if (status)
3891                 goto out;
3892         status = decode_putfh(&xdr);
3893         if (status)
3894                 goto out;
3895         status = decode_lockt(&xdr, res);
3896 out:
3897         return status;
3898 }
3899
3900 /*
3901  * Decode LOCKU response
3902  */
3903 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3904 {
3905         struct xdr_stream xdr;
3906         struct compound_hdr hdr;
3907         int status;
3908
3909         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3910         status = decode_compound_hdr(&xdr, &hdr);
3911         if (status)
3912                 goto out;
3913         status = decode_putfh(&xdr);
3914         if (status)
3915                 goto out;
3916         status = decode_locku(&xdr, res);
3917 out:
3918         return status;
3919 }
3920
3921 /*
3922  * Decode READLINK response
3923  */
3924 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3925 {
3926         struct xdr_stream xdr;
3927         struct compound_hdr hdr;
3928         int status;
3929
3930         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3931         status = decode_compound_hdr(&xdr, &hdr);
3932         if (status)
3933                 goto out;
3934         status = decode_putfh(&xdr);
3935         if (status)
3936                 goto out;
3937         status = decode_readlink(&xdr, rqstp);
3938 out:
3939         return status;
3940 }
3941
3942 /*
3943  * Decode READDIR response
3944  */
3945 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_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         status = decode_compound_hdr(&xdr, &hdr);
3953         if (status)
3954                 goto out;
3955         status = decode_putfh(&xdr);
3956         if (status)
3957                 goto out;
3958         status = decode_readdir(&xdr, rqstp, res);
3959 out:
3960         return status;
3961 }
3962
3963 /*
3964  * Decode Read response
3965  */
3966 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3967 {
3968         struct xdr_stream xdr;
3969         struct compound_hdr hdr;
3970         int status;
3971
3972         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3973         status = decode_compound_hdr(&xdr, &hdr);
3974         if (status)
3975                 goto out;
3976         status = decode_putfh(&xdr);
3977         if (status)
3978                 goto out;
3979         status = decode_read(&xdr, rqstp, res);
3980         if (!status)
3981                 status = res->count;
3982 out:
3983         return status;
3984 }
3985
3986 /*
3987  * Decode WRITE response
3988  */
3989 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3990 {
3991         struct xdr_stream xdr;
3992         struct compound_hdr hdr;
3993         int status;
3994
3995         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3996         status = decode_compound_hdr(&xdr, &hdr);
3997         if (status)
3998                 goto out;
3999         status = decode_putfh(&xdr);
4000         if (status)
4001                 goto out;
4002         status = decode_write(&xdr, res);
4003         if (status)
4004                 goto out;
4005         decode_getfattr(&xdr, res->fattr, res->server);
4006         if (!status)
4007                 status = res->count;
4008 out:
4009         return status;
4010 }
4011
4012 /*
4013  * Decode COMMIT response
4014  */
4015 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4016 {
4017         struct xdr_stream xdr;
4018         struct compound_hdr hdr;
4019         int status;
4020
4021         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4022         status = decode_compound_hdr(&xdr, &hdr);
4023         if (status)
4024                 goto out;
4025         status = decode_putfh(&xdr);
4026         if (status)
4027                 goto out;
4028         status = decode_commit(&xdr, res);
4029         if (status)
4030                 goto out;
4031         decode_getfattr(&xdr, res->fattr, res->server);
4032 out:
4033         return status;
4034 }
4035
4036 /*
4037  * FSINFO request
4038  */
4039 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4040 {
4041         struct xdr_stream xdr;
4042         struct compound_hdr hdr;
4043         int status;
4044
4045         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4046         status = decode_compound_hdr(&xdr, &hdr);
4047         if (!status)
4048                 status = decode_putfh(&xdr);
4049         if (!status)
4050                 status = decode_fsinfo(&xdr, fsinfo);
4051         if (!status)
4052                 status = -nfs_stat_to_errno(hdr.status);
4053         return status;
4054 }
4055
4056 /*
4057  * PATHCONF request
4058  */
4059 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4060 {
4061         struct xdr_stream xdr;
4062         struct compound_hdr hdr;
4063         int status;
4064
4065         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4066         status = decode_compound_hdr(&xdr, &hdr);
4067         if (!status)
4068                 status = decode_putfh(&xdr);
4069         if (!status)
4070                 status = decode_pathconf(&xdr, pathconf);
4071         return status;
4072 }
4073
4074 /*
4075  * STATFS request
4076  */
4077 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4078 {
4079         struct xdr_stream xdr;
4080         struct compound_hdr hdr;
4081         int status;
4082
4083         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4084         status = decode_compound_hdr(&xdr, &hdr);
4085         if (!status)
4086                 status = decode_putfh(&xdr);
4087         if (!status)
4088                 status = decode_statfs(&xdr, fsstat);
4089         return status;
4090 }
4091
4092 /*
4093  * GETATTR_BITMAP request
4094  */
4095 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4096 {
4097         struct xdr_stream xdr;
4098         struct compound_hdr hdr;
4099         int status;
4100
4101         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4102         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4103                 goto out;
4104         if ((status = decode_putfh(&xdr)) != 0)
4105                 goto out;
4106         status = decode_server_caps(&xdr, res);
4107 out:
4108         return status;
4109 }
4110
4111 /*
4112  * Decode RENEW response
4113  */
4114 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4115 {
4116         struct xdr_stream xdr;
4117         struct compound_hdr hdr;
4118         int status;
4119
4120         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4121         status = decode_compound_hdr(&xdr, &hdr);
4122         if (!status)
4123                 status = decode_renew(&xdr);
4124         return status;
4125 }
4126
4127 /*
4128  * a SETCLIENTID request
4129  */
4130 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4131                 struct nfs4_client *clp)
4132 {
4133         struct xdr_stream xdr;
4134         struct compound_hdr hdr;
4135         int status;
4136
4137         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4138         status = decode_compound_hdr(&xdr, &hdr);
4139         if (!status)
4140                 status = decode_setclientid(&xdr, clp);
4141         if (!status)
4142                 status = -nfs_stat_to_errno(hdr.status);
4143         return status;
4144 }
4145
4146 /*
4147  * a SETCLIENTID_CONFIRM request
4148  */
4149 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4150 {
4151         struct xdr_stream xdr;
4152         struct compound_hdr hdr;
4153         int status;
4154
4155         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4156         status = decode_compound_hdr(&xdr, &hdr);
4157         if (!status)
4158                 status = decode_setclientid_confirm(&xdr);
4159         if (!status)
4160                 status = decode_putrootfh(&xdr);
4161         if (!status)
4162                 status = decode_fsinfo(&xdr, fsinfo);
4163         if (!status)
4164                 status = -nfs_stat_to_errno(hdr.status);
4165         return status;
4166 }
4167
4168 /*
4169  * DELEGRETURN request
4170  */
4171 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4172 {
4173         struct xdr_stream xdr;
4174         struct compound_hdr hdr;
4175         int status;
4176
4177         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4178         status = decode_compound_hdr(&xdr, &hdr);
4179         if (status == 0) {
4180                 status = decode_putfh(&xdr);
4181                 if (status == 0)
4182                         status = decode_delegreturn(&xdr);
4183         }
4184         return status;
4185 }
4186
4187 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4188 {
4189         uint32_t bitmap[2] = {0};
4190         uint32_t len;
4191
4192         if (!*p++) {
4193                 if (!*p)
4194                         return ERR_PTR(-EAGAIN);
4195                 entry->eof = 1;
4196                 return ERR_PTR(-EBADCOOKIE);
4197         }
4198
4199         entry->prev_cookie = entry->cookie;
4200         p = xdr_decode_hyper(p, &entry->cookie);
4201         entry->len = ntohl(*p++);
4202         entry->name = (const char *) p;
4203         p += XDR_QUADLEN(entry->len);
4204
4205         /*
4206          * In case the server doesn't return an inode number,
4207          * we fake one here.  (We don't use inode number 0,
4208          * since glibc seems to choke on it...)
4209          */
4210         entry->ino = 1;
4211
4212         len = ntohl(*p++);              /* bitmap length */
4213         if (len-- > 0) {
4214                 bitmap[0] = ntohl(*p++);
4215                 if (len-- > 0) {
4216                         bitmap[1] = ntohl(*p++);
4217                         p += len;
4218                 }
4219         }
4220         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4221         if (len > 0) {
4222                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4223                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4224                         /* Ignore the return value of rdattr_error for now */
4225                         p++;
4226                         len--;
4227                 }
4228                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4229                         xdr_decode_hyper(p, &entry->ino);
4230                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4231                         xdr_decode_hyper(p, &entry->ino);
4232                 p += len;
4233         }
4234
4235         entry->eof = !p[0] && p[1];
4236         return p;
4237 }
4238
4239 /*
4240  * We need to translate between nfs status return values and
4241  * the local errno values which may not be the same.
4242  */
4243 static struct {
4244         int stat;
4245         int errno;
4246 } nfs_errtbl[] = {
4247         { NFS4_OK,              0               },
4248         { NFS4ERR_PERM,         EPERM           },
4249         { NFS4ERR_NOENT,        ENOENT          },
4250         { NFS4ERR_IO,           errno_NFSERR_IO },
4251         { NFS4ERR_NXIO,         ENXIO           },
4252         { NFS4ERR_ACCESS,       EACCES          },
4253         { NFS4ERR_EXIST,        EEXIST          },
4254         { NFS4ERR_XDEV,         EXDEV           },
4255         { NFS4ERR_NOTDIR,       ENOTDIR         },
4256         { NFS4ERR_ISDIR,        EISDIR          },
4257         { NFS4ERR_INVAL,        EINVAL          },
4258         { NFS4ERR_FBIG,         EFBIG           },
4259         { NFS4ERR_NOSPC,        ENOSPC          },
4260         { NFS4ERR_ROFS,         EROFS           },
4261         { NFS4ERR_MLINK,        EMLINK          },
4262         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4263         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4264         { NFS4ERR_DQUOT,        EDQUOT          },
4265         { NFS4ERR_STALE,        ESTALE          },
4266         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4267         { NFS4ERR_BADOWNER,     EINVAL          },
4268         { NFS4ERR_BADNAME,      EINVAL          },
4269         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4270         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4271         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4272         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4273         { NFS4ERR_BADTYPE,      EBADTYPE        },
4274         { NFS4ERR_LOCKED,       EAGAIN          },
4275         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4276         { NFS4ERR_SYMLINK,      ELOOP           },
4277         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4278         { NFS4ERR_DEADLOCK,     EDEADLK         },
4279         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4280                                                     * to be handled by a
4281                                                     * middle-layer.
4282                                                     */
4283         { -1,                   EIO             }
4284 };
4285
4286 /*
4287  * Convert an NFS error code to a local one.
4288  * This one is used jointly by NFSv2 and NFSv3.
4289  */
4290 static int
4291 nfs_stat_to_errno(int stat)
4292 {
4293         int i;
4294         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4295                 if (nfs_errtbl[i].stat == stat)
4296                         return nfs_errtbl[i].errno;
4297         }
4298         if (stat <= 10000 || stat > 10100) {
4299                 /* The server is looney tunes. */
4300                 return ESERVERFAULT;
4301         }
4302         /* If we cannot translate the error, the recovery routines should
4303          * handle it.
4304          * Note: remaining NFSv4 error codes have values > 10000, so should
4305          * not conflict with native Linux error codes.
4306          */
4307         return stat;
4308 }
4309
4310 #ifndef MAX
4311 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4312 #endif
4313
4314 #define PROC(proc, argtype, restype)                            \
4315 [NFSPROC4_CLNT_##proc] = {                                      \
4316         .p_proc   = NFSPROC4_COMPOUND,                          \
4317         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4318         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4319         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4320     }
4321
4322 struct rpc_procinfo     nfs4_procedures[] = {
4323   PROC(READ,            enc_read,       dec_read),
4324   PROC(WRITE,           enc_write,      dec_write),
4325   PROC(COMMIT,          enc_commit,     dec_commit),
4326   PROC(OPEN,            enc_open,       dec_open),
4327   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4328   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4329   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4330   PROC(CLOSE,           enc_close,      dec_close),
4331   PROC(SETATTR,         enc_setattr,    dec_setattr),
4332   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4333   PROC(RENEW,           enc_renew,      dec_renew),
4334   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4335   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4336   PROC(LOCK,            enc_lock,       dec_lock),
4337   PROC(LOCKT,           enc_lockt,      dec_lockt),
4338   PROC(LOCKU,           enc_locku,      dec_locku),
4339   PROC(ACCESS,          enc_access,     dec_access),
4340   PROC(GETATTR,         enc_getattr,    dec_getattr),
4341   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4342   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4343   PROC(REMOVE,          enc_remove,     dec_remove),
4344   PROC(RENAME,          enc_rename,     dec_rename),
4345   PROC(LINK,            enc_link,       dec_link),
4346   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4347   PROC(CREATE,          enc_create,     dec_create),
4348   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4349   PROC(STATFS,          enc_statfs,     dec_statfs),
4350   PROC(READLINK,        enc_readlink,   dec_readlink),
4351   PROC(READDIR,         enc_readdir,    dec_readdir),
4352   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4353   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4354   PROC(GETACL,          enc_getacl,     dec_getacl),
4355   PROC(SETACL,          enc_setacl,     dec_setacl),
4356 };
4357
4358 struct rpc_version              nfs_version4 = {
4359         .number                 = 4,
4360         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4361         .procs                  = nfs4_procedures
4362 };
4363
4364 /*
4365  * Local variables:
4366  *  c-basic-offset: 8
4367  * End:
4368  */