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 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 746 {
 747         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 748                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 749         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 750 }
 751
 752 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 753 {
 754         if (fl->fl_end == OFFSET_MAX)
 755                 return ~(uint64_t)0;
 756         return fl->fl_end - fl->fl_start + 1;
 757 }
 758
 759 /*
 760  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 761  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 762  */
 763 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 764 {
 765         uint32_t *p;
 766
 767         RESERVE_SPACE(32);
 768         WRITE32(OP_LOCK);
 769         WRITE32(nfs4_lock_type(args->fl, args->block));
 770         WRITE32(args->reclaim);
 771         WRITE64(args->fl->fl_start);
 772         WRITE64(nfs4_lock_length(args->fl));
 773         WRITE32(args->new_lock_owner);
 774         if (args->new_lock_owner){
 775                 RESERVE_SPACE(40);
 776                 WRITE32(args->open_seqid->sequence->counter);
 777                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
 778                 WRITE32(args->lock_seqid->sequence->counter);
 779                 WRITE64(args->lock_owner.clientid);
 780                 WRITE32(4);
 781                 WRITE32(args->lock_owner.id);
 782         }
 783         else {
 784                 RESERVE_SPACE(20);
 785                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
 786                 WRITE32(args->lock_seqid->sequence->counter);
 787         }
 788
 789         return 0;
 790 }
 791
 792 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 793 {
 794         uint32_t *p;
 795
 796         RESERVE_SPACE(40);
 797         WRITE32(OP_LOCKT);
 798         WRITE32(nfs4_lock_type(args->fl, 0));
 799         WRITE64(args->fl->fl_start);
 800         WRITE64(nfs4_lock_length(args->fl));
 801         WRITE64(args->lock_owner.clientid);
 802         WRITE32(4);
 803         WRITE32(args->lock_owner.id);
 804
 805         return 0;
 806 }
 807
 808 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 809 {
 810         uint32_t *p;
 811
 812         RESERVE_SPACE(44);
 813         WRITE32(OP_LOCKU);
 814         WRITE32(nfs4_lock_type(args->fl, 0));
 815         WRITE32(args->seqid->sequence->counter);
 816         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
 817         WRITE64(args->fl->fl_start);
 818         WRITE64(nfs4_lock_length(args->fl));
 819
 820         return 0;
 821 }
 822
 823 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 824 {
 825         int len = name->len;
 826         uint32_t *p;
 827
 828         RESERVE_SPACE(8 + len);
 829         WRITE32(OP_LOOKUP);
 830         WRITE32(len);
 831         WRITEMEM(name->name, len);
 832
 833         return 0;
 834 }
 835
 836 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 837 {
 838         uint32_t *p;
 839
 840         RESERVE_SPACE(8);
 841         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 842                 case FMODE_READ:
 843                         WRITE32(NFS4_SHARE_ACCESS_READ);
 844                         break;
 845                 case FMODE_WRITE:
 846                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 847                         break;
 848                 case FMODE_READ|FMODE_WRITE:
 849                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 850                         break;
 851                 default:
 852                         BUG();
 853         }
 854         WRITE32(0);             /* for linux, share_deny = 0 always */
 855 }
 856
 857 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 858 {
 859         uint32_t *p;
 860  /*
 861  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 862  * owner 4 = 32
 863  */
 864         RESERVE_SPACE(8);
 865         WRITE32(OP_OPEN);
 866         WRITE32(arg->seqid->sequence->counter);
 867         encode_share_access(xdr, arg->open_flags);
 868         RESERVE_SPACE(16);
 869         WRITE64(arg->clientid);
 870         WRITE32(4);
 871         WRITE32(arg->id);
 872 }
 873
 874 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 875 {
 876         uint32_t *p;
 877
 878         RESERVE_SPACE(4);
 879         switch(arg->open_flags & O_EXCL) {
 880                 case 0:
 881                         WRITE32(NFS4_CREATE_UNCHECKED);
 882                         encode_attrs(xdr, arg->u.attrs, arg->server);
 883                         break;
 884                 default:
 885                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 886                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 887         }
 888 }
 889
 890 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 891 {
 892         uint32_t *p;
 893
 894         RESERVE_SPACE(4);
 895         switch (arg->open_flags & O_CREAT) {
 896                 case 0:
 897                         WRITE32(NFS4_OPEN_NOCREATE);
 898                         break;
 899                 default:
 900                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 901                         WRITE32(NFS4_OPEN_CREATE);
 902                         encode_createmode(xdr, arg);
 903         }
 904 }
 905
 906 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 907 {
 908         uint32_t *p;
 909
 910         RESERVE_SPACE(4);
 911         switch (delegation_type) {
 912                 case 0:
 913                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 914                         break;
 915                 case FMODE_READ:
 916                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 917                         break;
 918                 case FMODE_WRITE|FMODE_READ:
 919                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 920                         break;
 921                 default:
 922                         BUG();
 923         }
 924 }
 925
 926 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 927 {
 928         uint32_t *p;
 929
 930         RESERVE_SPACE(4);
 931         WRITE32(NFS4_OPEN_CLAIM_NULL);
 932         encode_string(xdr, name->len, name->name);
 933 }
 934
 935 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 936 {
 937         uint32_t *p;
 938
 939         RESERVE_SPACE(4);
 940         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 941         encode_delegation_type(xdr, type);
 942 }
 943
 944 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 945 {
 946         uint32_t *p;
 947
 948         RESERVE_SPACE(4+sizeof(stateid->data));
 949         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 950         WRITEMEM(stateid->data, sizeof(stateid->data));
 951         encode_string(xdr, name->len, name->name);
 952 }
 953
 954 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 955 {
 956         encode_openhdr(xdr, arg);
 957         encode_opentype(xdr, arg);
 958         switch (arg->claim) {
 959                 case NFS4_OPEN_CLAIM_NULL:
 960                         encode_claim_null(xdr, arg->name);
 961                         break;
 962                 case NFS4_OPEN_CLAIM_PREVIOUS:
 963                         encode_claim_previous(xdr, arg->u.delegation_type);
 964                         break;
 965                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 966                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 967                         break;
 968                 default:
 969                         BUG();
 970         }
 971         return 0;
 972 }
 973
 974 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 975 {
 976         uint32_t *p;
 977
 978         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 979         WRITE32(OP_OPEN_CONFIRM);
 980         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 981         WRITE32(arg->seqid->sequence->counter);
 982
 983         return 0;
 984 }
 985
 986 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 987 {
 988         uint32_t *p;
 989
 990         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 991         WRITE32(OP_OPEN_DOWNGRADE);
 992         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 993         WRITE32(arg->seqid->sequence->counter);
 994         encode_share_access(xdr, arg->open_flags);
 995         return 0;
 996 }
 997
 998 static int
 999 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1000 {
1001         int len = fh->size;
1002         uint32_t *p;
1003
1004         RESERVE_SPACE(8 + len);
1005         WRITE32(OP_PUTFH);
1006         WRITE32(len);
1007         WRITEMEM(fh->data, len);
1008
1009         return 0;
1010 }
1011
1012 static int encode_putrootfh(struct xdr_stream *xdr)
1013 {
1014         uint32_t *p;
1015
1016         RESERVE_SPACE(4);
1017         WRITE32(OP_PUTROOTFH);
1018
1019         return 0;
1020 }
1021
1022 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1023 {
1024         nfs4_stateid stateid;
1025         uint32_t *p;
1026
1027         RESERVE_SPACE(16);
1028         if (ctx->state != NULL) {
1029                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1030                 WRITEMEM(stateid.data, sizeof(stateid.data));
1031         } else
1032                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1033 }
1034
1035 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1036 {
1037         uint32_t *p;
1038
1039         RESERVE_SPACE(4);
1040         WRITE32(OP_READ);
1041
1042         encode_stateid(xdr, args->context);
1043
1044         RESERVE_SPACE(12);
1045         WRITE64(args->offset);
1046         WRITE32(args->count);
1047
1048         return 0;
1049 }
1050
1051 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1052 {
1053         struct rpc_auth *auth = req->rq_task->tk_auth;
1054         uint32_t attrs[2] = {
1055                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1056                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1057         };
1058         int replen;
1059         uint32_t *p;
1060
1061         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1062         WRITE32(OP_READDIR);
1063         WRITE64(readdir->cookie);
1064         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1065         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1066         WRITE32(readdir->count);
1067         WRITE32(2);
1068         /* Switch to mounted_on_fileid if the server supports it */
1069         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1070                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1071         else
1072                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1073         WRITE32(attrs[0] & readdir->bitmask[0]);
1074         WRITE32(attrs[1] & readdir->bitmask[1]);
1075         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1076                         __FUNCTION__,
1077                         (unsigned long long)readdir->cookie,
1078                         ((u32 *)readdir->verifier.data)[0],
1079                         ((u32 *)readdir->verifier.data)[1],
1080                         attrs[0] & readdir->bitmask[0],
1081                         attrs[1] & readdir->bitmask[1]);
1082
1083         /* set up reply kvec
1084          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1085          *      + OP_READDIR + status + verifer(2)  = 9
1086          */
1087         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1088         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1089                          readdir->pgbase, readdir->count);
1090         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1091                         __FUNCTION__, replen, readdir->pages,
1092                         readdir->pgbase, readdir->count);
1093
1094         return 0;
1095 }
1096
1097 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1098 {
1099         struct rpc_auth *auth = req->rq_task->tk_auth;
1100         unsigned int replen;
1101         uint32_t *p;
1102
1103         RESERVE_SPACE(4);
1104         WRITE32(OP_READLINK);
1105
1106         /* set up reply kvec
1107          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1108          *      + OP_READLINK + status + string length = 8
1109          */
1110         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1111         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1112                         readlink->pgbase, readlink->pglen);
1113
1114         return 0;
1115 }
1116
1117 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1118 {
1119         uint32_t *p;
1120
1121         RESERVE_SPACE(8 + name->len);
1122         WRITE32(OP_REMOVE);
1123         WRITE32(name->len);
1124         WRITEMEM(name->name, name->len);
1125
1126         return 0;
1127 }
1128
1129 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1130 {
1131         uint32_t *p;
1132
1133         RESERVE_SPACE(8 + oldname->len);
1134         WRITE32(OP_RENAME);
1135         WRITE32(oldname->len);
1136         WRITEMEM(oldname->name, oldname->len);
1137
1138         RESERVE_SPACE(4 + newname->len);
1139         WRITE32(newname->len);
1140         WRITEMEM(newname->name, newname->len);
1141
1142         return 0;
1143 }
1144
1145 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1146 {
1147         uint32_t *p;
1148
1149         RESERVE_SPACE(12);
1150         WRITE32(OP_RENEW);
1151         WRITE64(client_stateid->cl_clientid);
1152
1153         return 0;
1154 }
1155
1156 static int
1157 encode_restorefh(struct xdr_stream *xdr)
1158 {
1159         uint32_t *p;
1160
1161         RESERVE_SPACE(4);
1162         WRITE32(OP_RESTOREFH);
1163
1164         return 0;
1165 }
1166
1167 static int
1168 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1169 {
1170         uint32_t *p;
1171
1172         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1173         WRITE32(OP_SETATTR);
1174         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1175         RESERVE_SPACE(2*4);
1176         WRITE32(1);
1177         WRITE32(FATTR4_WORD0_ACL);
1178         if (arg->acl_len % 4)
1179                 return -EINVAL;
1180         RESERVE_SPACE(4);
1181         WRITE32(arg->acl_len);
1182         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1183         return 0;
1184 }
1185
1186 static int
1187 encode_savefh(struct xdr_stream *xdr)
1188 {
1189         uint32_t *p;
1190
1191         RESERVE_SPACE(4);
1192         WRITE32(OP_SAVEFH);
1193
1194         return 0;
1195 }
1196
1197 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1198 {
1199         int status;
1200         uint32_t *p;
1201
1202         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1203         WRITE32(OP_SETATTR);
1204         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1205
1206         if ((status = encode_attrs(xdr, arg->iap, server)))
1207                 return status;
1208
1209         return 0;
1210 }
1211
1212 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1213 {
1214         uint32_t *p;
1215
1216         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1217         WRITE32(OP_SETCLIENTID);
1218         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1219
1220         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1221         RESERVE_SPACE(4);
1222         WRITE32(setclientid->sc_prog);
1223         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1224         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1225         RESERVE_SPACE(4);
1226         WRITE32(setclientid->sc_cb_ident);
1227
1228         return 0;
1229 }
1230
1231 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1232 {
1233         uint32_t *p;
1234
1235         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1236         WRITE32(OP_SETCLIENTID_CONFIRM);
1237         WRITE64(client_state->cl_clientid);
1238         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1239
1240         return 0;
1241 }
1242
1243 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1244 {
1245         uint32_t *p;
1246
1247         RESERVE_SPACE(4);
1248         WRITE32(OP_WRITE);
1249
1250         encode_stateid(xdr, args->context);
1251
1252         RESERVE_SPACE(16);
1253         WRITE64(args->offset);
1254         WRITE32(args->stable);
1255         WRITE32(args->count);
1256
1257         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1258
1259         return 0;
1260 }
1261
1262 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1263 {
1264         uint32_t *p;
1265
1266         RESERVE_SPACE(20);
1267
1268         WRITE32(OP_DELEGRETURN);
1269         WRITEMEM(stateid->data, sizeof(stateid->data));
1270         return 0;
1271
1272 }
1273 /*
1274  * END OF "GENERIC" ENCODE ROUTINES.
1275  */
1276
1277 /*
1278  * Encode an ACCESS request
1279  */
1280 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1281 {
1282         struct xdr_stream xdr;
1283         struct compound_hdr hdr = {
1284                 .nops = 2,
1285         };
1286         int status;
1287
1288         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1289         encode_compound_hdr(&xdr, &hdr);
1290         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1291                 status = encode_access(&xdr, args->access);
1292         return status;
1293 }
1294
1295 /*
1296  * Encode LOOKUP request
1297  */
1298 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1299 {
1300         struct xdr_stream xdr;
1301         struct compound_hdr hdr = {
1302                 .nops = 4,
1303         };
1304         int status;
1305
1306         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1307         encode_compound_hdr(&xdr, &hdr);
1308         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1309                 goto out;
1310         if ((status = encode_lookup(&xdr, args->name)) != 0)
1311                 goto out;
1312         if ((status = encode_getfh(&xdr)) != 0)
1313                 goto out;
1314         status = encode_getfattr(&xdr, args->bitmask);
1315 out:
1316         return status;
1317 }
1318
1319 /*
1320  * Encode LOOKUP_ROOT request
1321  */
1322 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1323 {
1324         struct xdr_stream xdr;
1325         struct compound_hdr hdr = {
1326                 .nops = 3,
1327         };
1328         int status;
1329
1330         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1331         encode_compound_hdr(&xdr, &hdr);
1332         if ((status = encode_putrootfh(&xdr)) != 0)
1333                 goto out;
1334         if ((status = encode_getfh(&xdr)) == 0)
1335                 status = encode_getfattr(&xdr, args->bitmask);
1336 out:
1337         return status;
1338 }
1339
1340 /*
1341  * Encode REMOVE request
1342  */
1343 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1344 {
1345         struct xdr_stream xdr;
1346         struct compound_hdr hdr = {
1347                 .nops = 3,
1348         };
1349         int status;
1350
1351         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1352         encode_compound_hdr(&xdr, &hdr);
1353         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1354                 goto out;
1355         if ((status = encode_remove(&xdr, args->name)) != 0)
1356                 goto out;
1357         status = encode_getfattr(&xdr, args->bitmask);
1358 out:
1359         return status;
1360 }
1361
1362 /*
1363  * Encode RENAME request
1364  */
1365 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1366 {
1367         struct xdr_stream xdr;
1368         struct compound_hdr hdr = {
1369                 .nops = 7,
1370         };
1371         int status;
1372
1373         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1374         encode_compound_hdr(&xdr, &hdr);
1375         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1376                 goto out;
1377         if ((status = encode_savefh(&xdr)) != 0)
1378                 goto out;
1379         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1380                 goto out;
1381         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1382                 goto out;
1383         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1384                 goto out;
1385         if ((status = encode_restorefh(&xdr)) != 0)
1386                 goto out;
1387         status = encode_getfattr(&xdr, args->bitmask);
1388 out:
1389         return status;
1390 }
1391
1392 /*
1393  * Encode LINK request
1394  */
1395 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1396 {
1397         struct xdr_stream xdr;
1398         struct compound_hdr hdr = {
1399                 .nops = 7,
1400         };
1401         int status;
1402
1403         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1404         encode_compound_hdr(&xdr, &hdr);
1405         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1406                 goto out;
1407         if ((status = encode_savefh(&xdr)) != 0)
1408                 goto out;
1409         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1410                 goto out;
1411         if ((status = encode_link(&xdr, args->name)) != 0)
1412                 goto out;
1413         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1414                 goto out;
1415         if ((status = encode_restorefh(&xdr)) != 0)
1416                 goto out;
1417         status = encode_getfattr(&xdr, args->bitmask);
1418 out:
1419         return status;
1420 }
1421
1422 /*
1423  * Encode CREATE request
1424  */
1425 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1426 {
1427         struct xdr_stream xdr;
1428         struct compound_hdr hdr = {
1429                 .nops = 7,
1430         };
1431         int status;
1432
1433         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1434         encode_compound_hdr(&xdr, &hdr);
1435         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1436                 goto out;
1437         if ((status = encode_savefh(&xdr)) != 0)
1438                 goto out;
1439         if ((status = encode_create(&xdr, args)) != 0)
1440                 goto out;
1441         if ((status = encode_getfh(&xdr)) != 0)
1442                 goto out;
1443         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1444                 goto out;
1445         if ((status = encode_restorefh(&xdr)) != 0)
1446                 goto out;
1447         status = encode_getfattr(&xdr, args->bitmask);
1448 out:
1449         return status;
1450 }
1451
1452 /*
1453  * Encode SYMLINK request
1454  */
1455 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1456 {
1457         return nfs4_xdr_enc_create(req, p, args);
1458 }
1459
1460 /*
1461  * Encode GETATTR request
1462  */
1463 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1464 {
1465         struct xdr_stream xdr;
1466         struct compound_hdr hdr = {
1467                 .nops = 2,
1468         };
1469         int status;
1470
1471         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1472         encode_compound_hdr(&xdr, &hdr);
1473         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1474                 status = encode_getfattr(&xdr, args->bitmask);
1475         return status;
1476 }
1477
1478 /*
1479  * Encode a CLOSE request
1480  */
1481 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1482 {
1483         struct xdr_stream xdr;
1484         struct compound_hdr hdr = {
1485                 .nops   = 3,
1486         };
1487         int status;
1488
1489         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1490         encode_compound_hdr(&xdr, &hdr);
1491         status = encode_putfh(&xdr, args->fh);
1492         if(status)
1493                 goto out;
1494         status = encode_close(&xdr, args);
1495         if (status != 0)
1496                 goto out;
1497         status = encode_getfattr(&xdr, args->bitmask);
1498 out:
1499         return status;
1500 }
1501
1502 /*
1503  * Encode an OPEN request
1504  */
1505 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1506 {
1507         struct xdr_stream xdr;
1508         struct compound_hdr hdr = {
1509                 .nops = 7,
1510         };
1511         int status;
1512
1513         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1514         encode_compound_hdr(&xdr, &hdr);
1515         status = encode_putfh(&xdr, args->fh);
1516         if (status)
1517                 goto out;
1518         status = encode_savefh(&xdr);
1519         if (status)
1520                 goto out;
1521         status = encode_open(&xdr, args);
1522         if (status)
1523                 goto out;
1524         status = encode_getfh(&xdr);
1525         if (status)
1526                 goto out;
1527         status = encode_getfattr(&xdr, args->bitmask);
1528         if (status)
1529                 goto out;
1530         status = encode_restorefh(&xdr);
1531         if (status)
1532                 goto out;
1533         status = encode_getfattr(&xdr, args->bitmask);
1534 out:
1535         return status;
1536 }
1537
1538 /*
1539  * Encode an OPEN_CONFIRM request
1540  */
1541 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1542 {
1543         struct xdr_stream xdr;
1544         struct compound_hdr hdr = {
1545                 .nops   = 2,
1546         };
1547         int status;
1548
1549         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1550         encode_compound_hdr(&xdr, &hdr);
1551         status = encode_putfh(&xdr, args->fh);
1552         if(status)
1553                 goto out;
1554         status = encode_open_confirm(&xdr, args);
1555 out:
1556         return status;
1557 }
1558
1559 /*
1560  * Encode an OPEN request with no attributes.
1561  */
1562 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1563 {
1564         struct xdr_stream xdr;
1565         struct compound_hdr hdr = {
1566                 .nops   = 3,
1567         };
1568         int status;
1569
1570         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1571         encode_compound_hdr(&xdr, &hdr);
1572         status = encode_putfh(&xdr, args->fh);
1573         if (status)
1574                 goto out;
1575         status = encode_open(&xdr, args);
1576         if (status)
1577                 goto out;
1578         status = encode_getfattr(&xdr, args->bitmask);
1579 out:
1580         return status;
1581 }
1582
1583 /*
1584  * Encode an OPEN_DOWNGRADE request
1585  */
1586 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1587 {
1588         struct xdr_stream xdr;
1589         struct compound_hdr hdr = {
1590                 .nops   = 3,
1591         };
1592         int status;
1593
1594         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1595         encode_compound_hdr(&xdr, &hdr);
1596         status = encode_putfh(&xdr, args->fh);
1597         if (status)
1598                 goto out;
1599         status = encode_open_downgrade(&xdr, args);
1600         if (status != 0)
1601                 goto out;
1602         status = encode_getfattr(&xdr, args->bitmask);
1603 out:
1604         return status;
1605 }
1606
1607 /*
1608  * Encode a LOCK request
1609  */
1610 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lock_args *args)
1611 {
1612         struct xdr_stream xdr;
1613         struct compound_hdr hdr = {
1614                 .nops   = 2,
1615         };
1616         int status;
1617
1618         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1619         encode_compound_hdr(&xdr, &hdr);
1620         status = encode_putfh(&xdr, args->fh);
1621         if(status)
1622                 goto out;
1623         status = encode_lock(&xdr, args);
1624 out:
1625         return status;
1626 }
1627
1628 /*
1629  * Encode a LOCKT request
1630  */
1631 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockt_args *args)
1632 {
1633         struct xdr_stream xdr;
1634         struct compound_hdr hdr = {
1635                 .nops   = 2,
1636         };
1637         int status;
1638
1639         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1640         encode_compound_hdr(&xdr, &hdr);
1641         status = encode_putfh(&xdr, args->fh);
1642         if(status)
1643                 goto out;
1644         status = encode_lockt(&xdr, args);
1645 out:
1646         return status;
1647 }
1648
1649 /*
1650  * Encode a LOCKU request
1651  */
1652 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_locku_args *args)
1653 {
1654         struct xdr_stream xdr;
1655         struct compound_hdr hdr = {
1656                 .nops   = 2,
1657         };
1658         int status;
1659
1660         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1661         encode_compound_hdr(&xdr, &hdr);
1662         status = encode_putfh(&xdr, args->fh);
1663         if(status)
1664                 goto out;
1665         status = encode_locku(&xdr, args);
1666 out:
1667         return status;
1668 }
1669
1670 /*
1671  * Encode a READLINK request
1672  */
1673 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1674 {
1675         struct xdr_stream xdr;
1676         struct compound_hdr hdr = {
1677                 .nops = 2,
1678         };
1679         int status;
1680
1681         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1682         encode_compound_hdr(&xdr, &hdr);
1683         status = encode_putfh(&xdr, args->fh);
1684         if(status)
1685                 goto out;
1686         status = encode_readlink(&xdr, args, req);
1687 out:
1688         return status;
1689 }
1690
1691 /*
1692  * Encode a READDIR request
1693  */
1694 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1695 {
1696         struct xdr_stream xdr;
1697         struct compound_hdr hdr = {
1698                 .nops = 2,
1699         };
1700         int status;
1701
1702         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703         encode_compound_hdr(&xdr, &hdr);
1704         status = encode_putfh(&xdr, args->fh);
1705         if(status)
1706                 goto out;
1707         status = encode_readdir(&xdr, args, req);
1708 out:
1709         return status;
1710 }
1711
1712 /*
1713  * Encode a READ request
1714  */
1715 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1716 {
1717         struct rpc_auth *auth = req->rq_task->tk_auth;
1718         struct xdr_stream xdr;
1719         struct compound_hdr hdr = {
1720                 .nops = 2,
1721         };
1722         int replen, status;
1723
1724         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1725         encode_compound_hdr(&xdr, &hdr);
1726         status = encode_putfh(&xdr, args->fh);
1727         if (status)
1728                 goto out;
1729         status = encode_read(&xdr, args);
1730         if (status)
1731                 goto out;
1732
1733         /* set up reply kvec
1734          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1735          *       + OP_READ + status + eof + datalen = 9
1736          */
1737         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1738         xdr_inline_pages(&req->rq_rcv_buf, replen,
1739                          args->pages, args->pgbase, args->count);
1740 out:
1741         return status;
1742 }
1743
1744 /*
1745  * Encode an SETATTR request
1746  */
1747 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1748
1749 {
1750         struct xdr_stream xdr;
1751         struct compound_hdr hdr = {
1752                 .nops   = 3,
1753         };
1754         int status;
1755
1756         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1757         encode_compound_hdr(&xdr, &hdr);
1758         status = encode_putfh(&xdr, args->fh);
1759         if(status)
1760                 goto out;
1761         status = encode_setattr(&xdr, args, args->server);
1762         if(status)
1763                 goto out;
1764         status = encode_getfattr(&xdr, args->bitmask);
1765 out:
1766         return status;
1767 }
1768
1769 /*
1770  * Encode a GETACL request
1771  */
1772 static int
1773 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1774                 struct nfs_getaclargs *args)
1775 {
1776         struct xdr_stream xdr;
1777         struct rpc_auth *auth = req->rq_task->tk_auth;
1778         struct compound_hdr hdr = {
1779                 .nops   = 2,
1780         };
1781         int replen, status;
1782
1783         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1784         encode_compound_hdr(&xdr, &hdr);
1785         status = encode_putfh(&xdr, args->fh);
1786         if (status)
1787                 goto out;
1788         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1789         /* set up reply buffer: */
1790         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1791         xdr_inline_pages(&req->rq_rcv_buf, replen,
1792                 args->acl_pages, args->acl_pgbase, args->acl_len);
1793 out:
1794         return status;
1795 }
1796
1797 /*
1798  * Encode a WRITE request
1799  */
1800 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1801 {
1802         struct xdr_stream xdr;
1803         struct compound_hdr hdr = {
1804                 .nops = 3,
1805         };
1806         int status;
1807
1808         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1809         encode_compound_hdr(&xdr, &hdr);
1810         status = encode_putfh(&xdr, args->fh);
1811         if (status)
1812                 goto out;
1813         status = encode_write(&xdr, args);
1814         if (status)
1815                 goto out;
1816         status = encode_getfattr(&xdr, args->bitmask);
1817 out:
1818         return status;
1819 }
1820
1821 /*
1822  *  a COMMIT request
1823  */
1824 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1825 {
1826         struct xdr_stream xdr;
1827         struct compound_hdr hdr = {
1828                 .nops = 3,
1829         };
1830         int status;
1831
1832         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1833         encode_compound_hdr(&xdr, &hdr);
1834         status = encode_putfh(&xdr, args->fh);
1835         if (status)
1836                 goto out;
1837         status = encode_commit(&xdr, args);
1838         if (status)
1839                 goto out;
1840         status = encode_getfattr(&xdr, args->bitmask);
1841 out:
1842         return status;
1843 }
1844
1845 /*
1846  * FSINFO request
1847  */
1848 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1849 {
1850         struct xdr_stream xdr;
1851         struct compound_hdr hdr = {
1852                 .nops   = 2,
1853         };
1854         int status;
1855
1856         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1857         encode_compound_hdr(&xdr, &hdr);
1858         status = encode_putfh(&xdr, args->fh);
1859         if (!status)
1860                 status = encode_fsinfo(&xdr, args->bitmask);
1861         return status;
1862 }
1863
1864 /*
1865  * a PATHCONF request
1866  */
1867 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1868 {
1869         struct xdr_stream xdr;
1870         struct compound_hdr hdr = {
1871                 .nops = 2,
1872         };
1873         int status;
1874
1875         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1876         encode_compound_hdr(&xdr, &hdr);
1877         status = encode_putfh(&xdr, args->fh);
1878         if (!status)
1879                 status = encode_getattr_one(&xdr,
1880                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1881         return status;
1882 }
1883
1884 /*
1885  * a STATFS request
1886  */
1887 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1888 {
1889         struct xdr_stream xdr;
1890         struct compound_hdr hdr = {
1891                 .nops = 2,
1892         };
1893         int status;
1894
1895         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1896         encode_compound_hdr(&xdr, &hdr);
1897         status = encode_putfh(&xdr, args->fh);
1898         if (status == 0)
1899                 status = encode_getattr_two(&xdr,
1900                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1901                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1902         return status;
1903 }
1904
1905 /*
1906  * GETATTR_BITMAP request
1907  */
1908 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1909 {
1910         struct xdr_stream xdr;
1911         struct compound_hdr hdr = {
1912                 .nops = 2,
1913         };
1914         int status;
1915
1916         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1917         encode_compound_hdr(&xdr, &hdr);
1918         status = encode_putfh(&xdr, fhandle);
1919         if (status == 0)
1920                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1921                                 FATTR4_WORD0_LINK_SUPPORT|
1922                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1923                                 FATTR4_WORD0_ACLSUPPORT);
1924         return status;
1925 }
1926
1927 /*
1928  * a RENEW request
1929  */
1930 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1931 {
1932         struct xdr_stream xdr;
1933         struct compound_hdr hdr = {
1934                 .nops   = 1,
1935         };
1936
1937         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1938         encode_compound_hdr(&xdr, &hdr);
1939         return encode_renew(&xdr, clp);
1940 }
1941
1942 /*
1943  * a SETCLIENTID request
1944  */
1945 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1946 {
1947         struct xdr_stream xdr;
1948         struct compound_hdr hdr = {
1949                 .nops   = 1,
1950         };
1951
1952         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1953         encode_compound_hdr(&xdr, &hdr);
1954         return encode_setclientid(&xdr, sc);
1955 }
1956
1957 /*
1958  * a SETCLIENTID_CONFIRM request
1959  */
1960 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1961 {
1962         struct xdr_stream xdr;
1963         struct compound_hdr hdr = {
1964                 .nops   = 3,
1965         };
1966         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1967         int status;
1968
1969         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1970         encode_compound_hdr(&xdr, &hdr);
1971         status = encode_setclientid_confirm(&xdr, clp);
1972         if (!status)
1973                 status = encode_putrootfh(&xdr);
1974         if (!status)
1975                 status = encode_fsinfo(&xdr, lease_bitmap);
1976         return status;
1977 }
1978
1979 /*
1980  * DELEGRETURN request
1981  */
1982 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1983 {
1984         struct xdr_stream xdr;
1985         struct compound_hdr hdr = {
1986                 .nops = 2,
1987         };
1988         int status;
1989
1990         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1991         encode_compound_hdr(&xdr, &hdr);
1992         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1993                 status = encode_delegreturn(&xdr, args->stateid);
1994         return status;
1995 }
1996
1997 /*
1998  * START OF "GENERIC" DECODE ROUTINES.
1999  *   These may look a little ugly since they are imported from a "generic"
2000  * set of XDR encode/decode routines which are intended to be shared by
2001  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2002  *
2003  * If the pain of reading these is too great, it should be a straightforward
2004  * task to translate them into Linux-specific versions which are more
2005  * consistent with the style used in NFSv2/v3...
2006  */
2007 #define READ32(x)         (x) = ntohl(*p++)
2008 #define READ64(x)         do {                  \
2009         (x) = (u64)ntohl(*p++) << 32;           \
2010         (x) |= ntohl(*p++);                     \
2011 } while (0)
2012 #define READTIME(x)       do {                  \
2013         p++;                                    \
2014         (x.tv_sec) = ntohl(*p++);               \
2015         (x.tv_nsec) = ntohl(*p++);              \
2016 } while (0)
2017 #define COPYMEM(x,nbytes) do {                  \
2018         memcpy((x), p, nbytes);                 \
2019         p += XDR_QUADLEN(nbytes);               \
2020 } while (0)
2021
2022 #define READ_BUF(nbytes)  do { \
2023         p = xdr_inline_decode(xdr, nbytes); \
2024         if (!p) { \
2025                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2026                                 __FUNCTION__, __LINE__); \
2027                 return -EIO; \
2028         } \
2029 } while (0)
2030
2031 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
2032 {
2033         uint32_t *p;
2034
2035         READ_BUF(4);
2036         READ32(*len);
2037         READ_BUF(*len);
2038         *string = (char *)p;
2039         return 0;
2040 }
2041
2042 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2043 {
2044         uint32_t *p;
2045
2046         READ_BUF(8);
2047         READ32(hdr->status);
2048         READ32(hdr->taglen);
2049
2050         READ_BUF(hdr->taglen + 4);
2051         hdr->tag = (char *)p;
2052         p += XDR_QUADLEN(hdr->taglen);
2053         READ32(hdr->nops);
2054         return 0;
2055 }
2056
2057 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2058 {
2059         uint32_t *p;
2060         uint32_t opnum;
2061         int32_t nfserr;
2062
2063         READ_BUF(8);
2064         READ32(opnum);
2065         if (opnum != expected) {
2066                 printk(KERN_NOTICE
2067                                 "nfs4_decode_op_hdr: Server returned operation"
2068                                 " %d but we issued a request for %d\n",
2069                                 opnum, expected);
2070                 return -EIO;
2071         }
2072         READ32(nfserr);
2073         if (nfserr != NFS_OK)
2074                 return -nfs_stat_to_errno(nfserr);
2075         return 0;
2076 }
2077
2078 /* Dummy routine */
2079 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2080 {
2081         uint32_t *p;
2082         uint32_t strlen;
2083         char *str;
2084
2085         READ_BUF(12);
2086         return decode_opaque_inline(xdr, &strlen, &str);
2087 }
2088
2089 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2090 {
2091         uint32_t bmlen, *p;
2092
2093         READ_BUF(4);
2094         READ32(bmlen);
2095
2096         bitmap[0] = bitmap[1] = 0;
2097         READ_BUF((bmlen << 2));
2098         if (bmlen > 0) {
2099                 READ32(bitmap[0]);
2100                 if (bmlen > 1)
2101                         READ32(bitmap[1]);
2102         }
2103         return 0;
2104 }
2105
2106 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2107 {
2108         uint32_t *p;
2109
2110         READ_BUF(4);
2111         READ32(*attrlen);
2112         *savep = xdr->p;
2113         return 0;
2114 }
2115
2116 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2117 {
2118         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2119                 decode_attr_bitmap(xdr, bitmask);
2120                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2121         } else
2122                 bitmask[0] = bitmask[1] = 0;
2123         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2124         return 0;
2125 }
2126
2127 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2128 {
2129         uint32_t *p;
2130
2131         *type = 0;
2132         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2133                 return -EIO;
2134         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2135                 READ_BUF(4);
2136                 READ32(*type);
2137                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2138                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2139                         return -EIO;
2140                 }
2141                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2142         }
2143         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2144         return 0;
2145 }
2146
2147 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2148 {
2149         uint32_t *p;
2150
2151         *change = 0;
2152         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2153                 return -EIO;
2154         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2155                 READ_BUF(8);
2156                 READ64(*change);
2157                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2158         }
2159         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2160                         (unsigned long long)*change);
2161         return 0;
2162 }
2163
2164 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2165 {
2166         uint32_t *p;
2167
2168         *size = 0;
2169         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2170                 return -EIO;
2171         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2172                 READ_BUF(8);
2173                 READ64(*size);
2174                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2175         }
2176         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2177         return 0;
2178 }
2179
2180 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2181 {
2182         uint32_t *p;
2183
2184         *res = 0;
2185         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2186                 return -EIO;
2187         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2188                 READ_BUF(4);
2189                 READ32(*res);
2190                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2191         }
2192         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2193         return 0;
2194 }
2195
2196 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2197 {
2198         uint32_t *p;
2199
2200         *res = 0;
2201         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2202                 return -EIO;
2203         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2204                 READ_BUF(4);
2205                 READ32(*res);
2206                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2207         }
2208         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2209         return 0;
2210 }
2211
2212 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2213 {
2214         uint32_t *p;
2215
2216         fsid->major = 0;
2217         fsid->minor = 0;
2218         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2219                 return -EIO;
2220         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2221                 READ_BUF(16);
2222                 READ64(fsid->major);
2223                 READ64(fsid->minor);
2224                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2225         }
2226         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2227                         (unsigned long long)fsid->major,
2228                         (unsigned long long)fsid->minor);
2229         return 0;
2230 }
2231
2232 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2233 {
2234         uint32_t *p;
2235
2236         *res = 60;
2237         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2238                 return -EIO;
2239         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2240                 READ_BUF(4);
2241                 READ32(*res);
2242                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2243         }
2244         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2245         return 0;
2246 }
2247
2248 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2249 {
2250         uint32_t *p;
2251
2252         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2253         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2254                 return -EIO;
2255         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2256                 READ_BUF(4);
2257                 READ32(*res);
2258                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2259         }
2260         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2261         return 0;
2262 }
2263
2264 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2265 {
2266         uint32_t *p;
2267
2268         *fileid = 0;
2269         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2270                 return -EIO;
2271         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2272                 READ_BUF(8);
2273                 READ64(*fileid);
2274                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2275         }
2276         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2277         return 0;
2278 }
2279
2280 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2281 {
2282         uint32_t *p;
2283         int status = 0;
2284
2285         *res = 0;
2286         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2287                 return -EIO;
2288         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2289                 READ_BUF(8);
2290                 READ64(*res);
2291                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2292         }
2293         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2294         return status;
2295 }
2296
2297 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2298 {
2299         uint32_t *p;
2300         int status = 0;
2301
2302         *res = 0;
2303         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2304                 return -EIO;
2305         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2306                 READ_BUF(8);
2307                 READ64(*res);
2308                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2309         }
2310         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2311         return status;
2312 }
2313
2314 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2315 {
2316         uint32_t *p;
2317         int status = 0;
2318
2319         *res = 0;
2320         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2321                 return -EIO;
2322         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2323                 READ_BUF(8);
2324                 READ64(*res);
2325                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2326         }
2327         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2328         return status;
2329 }
2330
2331 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2332 {
2333         uint32_t *p;
2334         int status = 0;
2335
2336         *res = 0;
2337         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2338                 return -EIO;
2339         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2340                 READ_BUF(8);
2341                 READ64(*res);
2342                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2343         }
2344         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2345         return status;
2346 }
2347
2348 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2349 {
2350         uint32_t *p;
2351         int status = 0;
2352
2353         *maxlink = 1;
2354         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2355                 return -EIO;
2356         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2357                 READ_BUF(4);
2358                 READ32(*maxlink);
2359                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2360         }
2361         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2362         return status;
2363 }
2364
2365 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2366 {
2367         uint32_t *p;
2368         int status = 0;
2369
2370         *maxname = 1024;
2371         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2372                 return -EIO;
2373         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2374                 READ_BUF(4);
2375                 READ32(*maxname);
2376                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2377         }
2378         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2379         return status;
2380 }
2381
2382 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2383 {
2384         uint32_t *p;
2385         int status = 0;
2386
2387         *res = 1024;
2388         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2389                 return -EIO;
2390         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2391                 uint64_t maxread;
2392                 READ_BUF(8);
2393                 READ64(maxread);
2394                 if (maxread > 0x7FFFFFFF)
2395                         maxread = 0x7FFFFFFF;
2396                 *res = (uint32_t)maxread;
2397                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2398         }
2399         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2400         return status;
2401 }
2402
2403 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2404 {
2405         uint32_t *p;
2406         int status = 0;
2407
2408         *res = 1024;
2409         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2410                 return -EIO;
2411         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2412                 uint64_t maxwrite;
2413                 READ_BUF(8);
2414                 READ64(maxwrite);
2415                 if (maxwrite > 0x7FFFFFFF)
2416                         maxwrite = 0x7FFFFFFF;
2417                 *res = (uint32_t)maxwrite;
2418                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2419         }
2420         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2421         return status;
2422 }
2423
2424 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2425 {
2426         uint32_t *p;
2427
2428         *mode = 0;
2429         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2430                 return -EIO;
2431         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2432                 READ_BUF(4);
2433                 READ32(*mode);
2434                 *mode &= ~S_IFMT;
2435                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2436         }
2437         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2438         return 0;
2439 }
2440
2441 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2442 {
2443         uint32_t *p;
2444
2445         *nlink = 1;
2446         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2447                 return -EIO;
2448         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2449                 READ_BUF(4);
2450                 READ32(*nlink);
2451                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2452         }
2453         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2454         return 0;
2455 }
2456
2457 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2458 {
2459         uint32_t len, *p;
2460
2461         *uid = -2;
2462         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2463                 return -EIO;
2464         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2465                 READ_BUF(4);
2466                 READ32(len);
2467                 READ_BUF(len);
2468                 if (len < XDR_MAX_NETOBJ) {
2469                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2470                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2471                                                 __FUNCTION__);
2472                 } else
2473                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2474                                         __FUNCTION__, len);
2475                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2476         }
2477         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2478         return 0;
2479 }
2480
2481 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2482 {
2483         uint32_t len, *p;
2484
2485         *gid = -2;
2486         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2487                 return -EIO;
2488         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2489                 READ_BUF(4);
2490                 READ32(len);
2491                 READ_BUF(len);
2492                 if (len < XDR_MAX_NETOBJ) {
2493                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2494                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2495                                                 __FUNCTION__);
2496                 } else
2497                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2498                                         __FUNCTION__, len);
2499                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2500         }
2501         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2502         return 0;
2503 }
2504
2505 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2506 {
2507         uint32_t major = 0, minor = 0, *p;
2508
2509         *rdev = MKDEV(0,0);
2510         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2511                 return -EIO;
2512         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2513                 dev_t tmp;
2514
2515                 READ_BUF(8);
2516                 READ32(major);
2517                 READ32(minor);
2518                 tmp = MKDEV(major, minor);
2519                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2520                         *rdev = tmp;
2521                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2522         }
2523         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2524         return 0;
2525 }
2526
2527 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2528 {
2529         uint32_t *p;
2530         int status = 0;
2531
2532         *res = 0;
2533         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2534                 return -EIO;
2535         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2536                 READ_BUF(8);
2537                 READ64(*res);
2538                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2539         }
2540         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2541         return status;
2542 }
2543
2544 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2545 {
2546         uint32_t *p;
2547         int status = 0;
2548
2549         *res = 0;
2550         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2551                 return -EIO;
2552         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2553                 READ_BUF(8);
2554                 READ64(*res);
2555                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2556         }
2557         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2558         return status;
2559 }
2560
2561 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2562 {
2563         uint32_t *p;
2564         int status = 0;
2565
2566         *res = 0;
2567         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2568                 return -EIO;
2569         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2570                 READ_BUF(8);
2571                 READ64(*res);
2572                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2573         }
2574         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2575         return status;
2576 }
2577
2578 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2579 {
2580         uint32_t *p;
2581
2582         *used = 0;
2583         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2584                 return -EIO;
2585         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2586                 READ_BUF(8);
2587                 READ64(*used);
2588                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2589         }
2590         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2591                         (unsigned long long)*used);
2592         return 0;
2593 }
2594
2595 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2596 {
2597         uint32_t *p;
2598         uint64_t sec;
2599         uint32_t nsec;
2600
2601         READ_BUF(12);
2602         READ64(sec);
2603         READ32(nsec);
2604         time->tv_sec = (time_t)sec;
2605         time->tv_nsec = (long)nsec;
2606         return 0;
2607 }
2608
2609 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2610 {
2611         int status = 0;
2612
2613         time->tv_sec = 0;
2614         time->tv_nsec = 0;
2615         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2616                 return -EIO;
2617         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2618                 status = decode_attr_time(xdr, time);
2619                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2620         }
2621         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2622         return status;
2623 }
2624
2625 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2626 {
2627         int status = 0;
2628
2629         time->tv_sec = 0;
2630         time->tv_nsec = 0;
2631         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2632                 return -EIO;
2633         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2634                 status = decode_attr_time(xdr, time);
2635                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2636         }
2637         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2638         return status;
2639 }
2640
2641 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2642 {
2643         int status = 0;
2644
2645         time->tv_sec = 0;
2646         time->tv_nsec = 0;
2647         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2648                 return -EIO;
2649         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2650                 status = decode_attr_time(xdr, time);
2651                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2652         }
2653         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2654         return status;
2655 }
2656
2657 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2658 {
2659         unsigned int attrwords = XDR_QUADLEN(attrlen);
2660         unsigned int nwords = xdr->p - savep;
2661
2662         if (unlikely(attrwords != nwords)) {
2663                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2664                                 __FUNCTION__,
2665                                 attrwords << 2,
2666                                 (attrwords < nwords) ? '<' : '>',
2667                                 nwords << 2);
2668                 return -EIO;
2669         }
2670         return 0;
2671 }
2672
2673 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2674 {
2675         uint32_t *p;
2676
2677         READ_BUF(20);
2678         READ32(cinfo->atomic);
2679         READ64(cinfo->before);
2680         READ64(cinfo->after);
2681         return 0;
2682 }
2683
2684 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2685 {
2686         uint32_t *p;
2687         uint32_t supp, acc;
2688         int status;
2689
2690         status = decode_op_hdr(xdr, OP_ACCESS);
2691         if (status)
2692                 return status;
2693         READ_BUF(8);
2694         READ32(supp);
2695         READ32(acc);
2696         access->supported = supp;
2697         access->access = acc;
2698         return 0;
2699 }
2700
2701 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2702 {
2703         uint32_t *p;
2704         int status;
2705
2706         status = decode_op_hdr(xdr, OP_CLOSE);
2707         if (status)
2708                 return status;
2709         READ_BUF(sizeof(res->stateid.data));
2710         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2711         return 0;
2712 }
2713
2714 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2715 {
2716         uint32_t *p;
2717         int status;
2718
2719         status = decode_op_hdr(xdr, OP_COMMIT);
2720         if (status)
2721                 return status;
2722         READ_BUF(8);
2723         COPYMEM(res->verf->verifier, 8);
2724         return 0;
2725 }
2726
2727 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2728 {
2729         uint32_t *p;
2730         uint32_t bmlen;
2731         int status;
2732
2733         status = decode_op_hdr(xdr, OP_CREATE);
2734         if (status)
2735                 return status;
2736         if ((status = decode_change_info(xdr, cinfo)))
2737                 return status;
2738         READ_BUF(4);
2739         READ32(bmlen);
2740         READ_BUF(bmlen << 2);
2741         return 0;
2742 }
2743
2744 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2745 {
2746         uint32_t *savep;
2747         uint32_t attrlen,
2748                  bitmap[2] = {0};
2749         int status;
2750
2751         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2752                 goto xdr_error;
2753         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2754                 goto xdr_error;
2755         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2756                 goto xdr_error;
2757         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2758                 goto xdr_error;
2759         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2760                 goto xdr_error;
2761         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2762                 goto xdr_error;
2763         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2764                 goto xdr_error;
2765         status = verify_attr_len(xdr, savep, attrlen);
2766 xdr_error:
2767         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2768         return status;
2769 }
2770
2771 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2772 {
2773         uint32_t *savep;
2774         uint32_t attrlen,
2775                  bitmap[2] = {0};
2776         int status;
2777
2778         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2779                 goto xdr_error;
2780         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2781                 goto xdr_error;
2782         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2783                 goto xdr_error;
2784
2785         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2786                 goto xdr_error;
2787         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2788                 goto xdr_error;
2789         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2790                 goto xdr_error;
2791         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2792                 goto xdr_error;
2793         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2794                 goto xdr_error;
2795         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2796                 goto xdr_error;
2797
2798         status = verify_attr_len(xdr, savep, attrlen);
2799 xdr_error:
2800         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2801         return status;
2802 }
2803
2804 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2805 {
2806         uint32_t *savep;
2807         uint32_t attrlen,
2808                  bitmap[2] = {0};
2809         int status;
2810
2811         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2812                 goto xdr_error;
2813         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2814                 goto xdr_error;
2815         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2816                 goto xdr_error;
2817
2818         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2819                 goto xdr_error;
2820         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2821                 goto xdr_error;
2822
2823         status = verify_attr_len(xdr, savep, attrlen);
2824 xdr_error:
2825         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2826         return status;
2827 }
2828
2829 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2830 {
2831         uint32_t *savep;
2832         uint32_t attrlen,
2833                  bitmap[2] = {0},
2834                  type;
2835         int status, fmode = 0;
2836
2837         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2838                 goto xdr_error;
2839         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2840                 goto xdr_error;
2841
2842         fattr->bitmap[0] = bitmap[0];
2843         fattr->bitmap[1] = bitmap[1];
2844
2845         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2846                 goto xdr_error;
2847
2848
2849         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2850                 goto xdr_error;
2851         fattr->type = nfs_type2fmt[type].nfs2type;
2852         fmode = nfs_type2fmt[type].mode;
2853
2854         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2855                 goto xdr_error;
2856         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2857                 goto xdr_error;
2858         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2859                 goto xdr_error;
2860         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2861                 goto xdr_error;
2862         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2863                 goto xdr_error;
2864         fattr->mode |= fmode;
2865         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2866                 goto xdr_error;
2867         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2868                 goto xdr_error;
2869         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2870                 goto xdr_error;
2871         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2872                 goto xdr_error;
2873         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2876                 goto xdr_error;
2877         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2878                 goto xdr_error;
2879         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2880                 goto xdr_error;
2881         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2882                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2883 xdr_error:
2884         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2885         return status;
2886 }
2887
2888
2889 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2890 {
2891         uint32_t *savep;
2892         uint32_t attrlen, bitmap[2];
2893         int status;
2894
2895         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2896                 goto xdr_error;
2897         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2898                 goto xdr_error;
2899         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2900                 goto xdr_error;
2901
2902         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2903
2904         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2905                 goto xdr_error;
2906         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2907                 goto xdr_error;
2908         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2909                 goto xdr_error;
2910         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2911         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2912                 goto xdr_error;
2913         fsinfo->wtpref = fsinfo->wtmax;
2914
2915         status = verify_attr_len(xdr, savep, attrlen);
2916 xdr_error:
2917         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2918         return status;
2919 }
2920
2921 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2922 {
2923         uint32_t *p;
2924         uint32_t len;
2925         int status;
2926
2927         status = decode_op_hdr(xdr, OP_GETFH);
2928         if (status)
2929                 return status;
2930         /* Zero handle first to allow comparisons */
2931         memset(fh, 0, sizeof(*fh));
2932
2933         READ_BUF(4);
2934         READ32(len);
2935         if (len > NFS4_FHSIZE)
2936                 return -EIO;
2937         fh->size = len;
2938         READ_BUF(len);
2939         COPYMEM(fh->data, len);
2940         return 0;
2941 }
2942
2943 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2944 {
2945         int status;
2946
2947         status = decode_op_hdr(xdr, OP_LINK);
2948         if (status)
2949                 return status;
2950         return decode_change_info(xdr, cinfo);
2951 }
2952
2953 /*
2954  * We create the owner, so we know a proper owner.id length is 4.
2955  */
2956 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
2957 {
2958         uint64_t offset, length, clientid;
2959         uint32_t *p;
2960         uint32_t namelen, type;
2961
2962         READ_BUF(32);
2963         READ64(offset);
2964         READ64(length);
2965         READ32(type);
2966         if (fl != NULL) {
2967                 fl->fl_start = (loff_t)offset;
2968                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
2969                 if (length == ~(uint64_t)0)
2970                         fl->fl_end = OFFSET_MAX;
2971                 fl->fl_type = F_WRLCK;
2972                 if (type & 1)
2973                         fl->fl_type = F_RDLCK;
2974                 fl->fl_pid = 0;
2975         }
2976         READ64(clientid);
2977         READ32(namelen);
2978         READ_BUF(namelen);
2979         return -NFS4ERR_DENIED;
2980 }
2981
2982 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
2983 {
2984         uint32_t *p;
2985         int status;
2986
2987         status = decode_op_hdr(xdr, OP_LOCK);
2988         if (status == 0) {
2989                 READ_BUF(sizeof(res->stateid.data));
2990                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2991         } else if (status == -NFS4ERR_DENIED)
2992                 return decode_lock_denied(xdr, NULL);
2993         return status;
2994 }
2995
2996 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
2997 {
2998         int status;
2999         status = decode_op_hdr(xdr, OP_LOCKT);
3000         if (status == -NFS4ERR_DENIED)
3001                 return decode_lock_denied(xdr, res->denied);
3002         return status;
3003 }
3004
3005 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3006 {
3007         uint32_t *p;
3008         int status;
3009
3010         status = decode_op_hdr(xdr, OP_LOCKU);
3011         if (status == 0) {
3012                 READ_BUF(sizeof(res->stateid.data));
3013                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3014         }
3015         return status;
3016 }
3017
3018 static int decode_lookup(struct xdr_stream *xdr)
3019 {
3020         return decode_op_hdr(xdr, OP_LOOKUP);
3021 }
3022
3023 /* This is too sick! */
3024 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3025 {
3026         uint32_t *p;
3027         uint32_t limit_type, nblocks, blocksize;
3028
3029         READ_BUF(12);
3030         READ32(limit_type);
3031         switch (limit_type) {
3032                 case 1:
3033                         READ64(*maxsize);
3034                         break;
3035                 case 2:
3036                         READ32(nblocks);
3037                         READ32(blocksize);
3038                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3039         }
3040         return 0;
3041 }
3042
3043 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3044 {
3045         uint32_t *p;
3046         uint32_t delegation_type;
3047
3048         READ_BUF(4);
3049         READ32(delegation_type);
3050         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3051                 res->delegation_type = 0;
3052                 return 0;
3053         }
3054         READ_BUF(20);
3055         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3056         READ32(res->do_recall);
3057         switch (delegation_type) {
3058                 case NFS4_OPEN_DELEGATE_READ:
3059                         res->delegation_type = FMODE_READ;
3060                         break;
3061                 case NFS4_OPEN_DELEGATE_WRITE:
3062                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3063                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3064                                 return -EIO;
3065         }
3066         return decode_ace(xdr, NULL, res->server->nfs4_state);
3067 }
3068
3069 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3070 {
3071         uint32_t *p;
3072         uint32_t bmlen;
3073         int status;
3074
3075         status = decode_op_hdr(xdr, OP_OPEN);
3076         if (status)
3077                 return status;
3078         READ_BUF(sizeof(res->stateid.data));
3079         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3080
3081         decode_change_info(xdr, &res->cinfo);
3082
3083         READ_BUF(8);
3084         READ32(res->rflags);
3085         READ32(bmlen);
3086         if (bmlen > 10)
3087                 goto xdr_error;
3088
3089         READ_BUF(bmlen << 2);
3090         p += bmlen;
3091         return decode_delegation(xdr, res);
3092 xdr_error:
3093         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3094         return -EIO;
3095 }
3096
3097 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3098 {
3099         uint32_t *p;
3100         int status;
3101
3102         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
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_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3111 {
3112         uint32_t *p;
3113         int status;
3114
3115         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3116         if (status)
3117                 return status;
3118         READ_BUF(sizeof(res->stateid.data));
3119         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3120         return 0;
3121 }
3122
3123 static int decode_putfh(struct xdr_stream *xdr)
3124 {
3125         return decode_op_hdr(xdr, OP_PUTFH);
3126 }
3127
3128 static int decode_putrootfh(struct xdr_stream *xdr)
3129 {
3130         return decode_op_hdr(xdr, OP_PUTROOTFH);
3131 }
3132
3133 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3134 {
3135         struct kvec *iov = req->rq_rcv_buf.head;
3136         uint32_t *p;
3137         uint32_t count, eof, recvd, hdrlen;
3138         int status;
3139
3140         status = decode_op_hdr(xdr, OP_READ);
3141         if (status)
3142                 return status;
3143         READ_BUF(8);
3144         READ32(eof);
3145         READ32(count);
3146         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3147         recvd = req->rq_rcv_buf.len - hdrlen;
3148         if (count > recvd) {
3149                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3150                                 "count %u > recvd %u\n", count, recvd);
3151                 count = recvd;
3152                 eof = 0;
3153         }
3154         xdr_read_pages(xdr, count);
3155         res->eof = eof;
3156         res->count = count;
3157         return 0;
3158 }
3159
3160 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3161 {
3162         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3163         struct page     *page = *rcvbuf->pages;
3164         struct kvec     *iov = rcvbuf->head;
3165         unsigned int    nr, pglen = rcvbuf->page_len;
3166         uint32_t        *end, *entry, *p, *kaddr;
3167         uint32_t        len, attrlen;
3168         int             hdrlen, recvd, status;
3169
3170         status = decode_op_hdr(xdr, OP_READDIR);
3171         if (status)
3172                 return status;
3173         READ_BUF(8);
3174         COPYMEM(readdir->verifier.data, 8);
3175         dprintk("%s: verifier = 0x%x%x\n",
3176                         __FUNCTION__,
3177                         ((u32 *)readdir->verifier.data)[0],
3178                         ((u32 *)readdir->verifier.data)[1]);
3179
3180
3181         hdrlen = (char *) p - (char *) iov->iov_base;
3182         recvd = rcvbuf->len - hdrlen;
3183         if (pglen > recvd)
3184                 pglen = recvd;
3185         xdr_read_pages(xdr, pglen);
3186
3187         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3188         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3189         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3190         entry = p;
3191         for (nr = 0; *p++; nr++) {
3192                 if (p + 3 > end)
3193                         goto short_pkt;
3194                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3195                 p += 2;                 /* cookie */
3196                 len = ntohl(*p++);      /* filename length */
3197                 if (len > NFS4_MAXNAMLEN) {
3198                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3199                         goto err_unmap;
3200                 }
3201                 dprintk("filename = %*s\n", len, (char *)p);
3202                 p += XDR_QUADLEN(len);
3203                 if (p + 1 > end)
3204                         goto short_pkt;
3205                 len = ntohl(*p++);      /* bitmap length */
3206                 p += len;
3207                 if (p + 1 > end)
3208                         goto short_pkt;
3209                 attrlen = XDR_QUADLEN(ntohl(*p++));
3210                 p += attrlen;           /* attributes */
3211                 if (p + 2 > end)
3212                         goto short_pkt;
3213                 entry = p;
3214         }
3215         if (!nr && (entry[0] != 0 || entry[1] == 0))
3216                 goto short_pkt;
3217 out:
3218         kunmap_atomic(kaddr, KM_USER0);
3219         return 0;
3220 short_pkt:
3221         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3222         entry[0] = entry[1] = 0;
3223         /* truncate listing ? */
3224         if (!nr) {
3225                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3226                 entry[1] = 1;
3227         }
3228         goto out;
3229 err_unmap:
3230         kunmap_atomic(kaddr, KM_USER0);
3231         return -errno_NFSERR_IO;
3232 }
3233
3234 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3235 {
3236         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3237         struct kvec *iov = rcvbuf->head;
3238         int hdrlen, len, recvd;
3239         uint32_t *p;
3240         char *kaddr;
3241         int status;
3242
3243         status = decode_op_hdr(xdr, OP_READLINK);
3244         if (status)
3245                 return status;
3246
3247         /* Convert length of symlink */
3248         READ_BUF(4);
3249         READ32(len);
3250         if (len >= rcvbuf->page_len || len <= 0) {
3251                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3252                 return -ENAMETOOLONG;
3253         }
3254         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3255         recvd = req->rq_rcv_buf.len - hdrlen;
3256         if (recvd < len) {
3257                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3258                                 "count %u > recvd %u\n", len, recvd);
3259                 return -EIO;
3260         }
3261         xdr_read_pages(xdr, len);
3262         /*
3263          * The XDR encode routine has set things up so that
3264          * the link text will be copied directly into the
3265          * buffer.  We just have to do overflow-checking,
3266          * and and null-terminate the text (the VFS expects
3267          * null-termination).
3268          */
3269         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3270         kaddr[len+rcvbuf->page_base] = '\0';
3271         kunmap_atomic(kaddr, KM_USER0);
3272         return 0;
3273 }
3274
3275 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3276 {
3277         int status;
3278
3279         status = decode_op_hdr(xdr, OP_REMOVE);
3280         if (status)
3281                 goto out;
3282         status = decode_change_info(xdr, cinfo);
3283 out:
3284         return status;
3285 }
3286
3287 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3288               struct nfs4_change_info *new_cinfo)
3289 {
3290         int status;
3291
3292         status = decode_op_hdr(xdr, OP_RENAME);
3293         if (status)
3294                 goto out;
3295         if ((status = decode_change_info(xdr, old_cinfo)))
3296                 goto out;
3297         status = decode_change_info(xdr, new_cinfo);
3298 out:
3299         return status;
3300 }
3301
3302 static int decode_renew(struct xdr_stream *xdr)
3303 {
3304         return decode_op_hdr(xdr, OP_RENEW);
3305 }
3306
3307 static int
3308 decode_restorefh(struct xdr_stream *xdr)
3309 {
3310         return decode_op_hdr(xdr, OP_RESTOREFH);
3311 }
3312
3313 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3314                 size_t *acl_len)
3315 {
3316         uint32_t *savep;
3317         uint32_t attrlen,
3318                  bitmap[2] = {0};
3319         struct kvec *iov = req->rq_rcv_buf.head;
3320         int status;
3321
3322         *acl_len = 0;
3323         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3324                 goto out;
3325         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3326                 goto out;
3327         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3328                 goto out;
3329
3330         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3331                 return -EIO;
3332         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3333                 int hdrlen, recvd;
3334
3335                 /* We ignore &savep and don't do consistency checks on
3336                  * the attr length.  Let userspace figure it out.... */
3337                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3338                 recvd = req->rq_rcv_buf.len - hdrlen;
3339                 if (attrlen > recvd) {
3340                         printk(KERN_WARNING "NFS: server cheating in getattr"
3341                                         " acl reply: attrlen %u > recvd %u\n",
3342                                         attrlen, recvd);
3343                         return -EINVAL;
3344                 }
3345                 if (attrlen <= *acl_len)
3346                         xdr_read_pages(xdr, attrlen);
3347                 *acl_len = attrlen;
3348         } else
3349                 status = -EOPNOTSUPP;
3350
3351 out:
3352         return status;
3353 }
3354
3355 static int
3356 decode_savefh(struct xdr_stream *xdr)
3357 {
3358         return decode_op_hdr(xdr, OP_SAVEFH);
3359 }
3360
3361 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3362 {
3363         uint32_t *p;
3364         uint32_t bmlen;
3365         int status;
3366
3367
3368         status = decode_op_hdr(xdr, OP_SETATTR);
3369         if (status)
3370                 return status;
3371         READ_BUF(4);
3372         READ32(bmlen);
3373         READ_BUF(bmlen << 2);
3374         return 0;
3375 }
3376
3377 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3378 {
3379         uint32_t *p;
3380         uint32_t opnum;
3381         int32_t nfserr;
3382
3383         READ_BUF(8);
3384         READ32(opnum);
3385         if (opnum != OP_SETCLIENTID) {
3386                 printk(KERN_NOTICE
3387                                 "nfs4_decode_setclientid: Server returned operation"
3388                                 " %d\n", opnum);
3389                 return -EIO;
3390         }
3391         READ32(nfserr);
3392         if (nfserr == NFS_OK) {
3393                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3394                 READ64(clp->cl_clientid);
3395                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3396         } else if (nfserr == NFSERR_CLID_INUSE) {
3397                 uint32_t len;
3398
3399                 /* skip netid string */
3400                 READ_BUF(4);
3401                 READ32(len);
3402                 READ_BUF(len);
3403
3404                 /* skip uaddr string */
3405                 READ_BUF(4);
3406                 READ32(len);
3407                 READ_BUF(len);
3408                 return -NFSERR_CLID_INUSE;
3409         } else
3410                 return -nfs_stat_to_errno(nfserr);
3411
3412         return 0;
3413 }
3414
3415 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3416 {
3417         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3418 }
3419
3420 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3421 {
3422         uint32_t *p;
3423         int status;
3424
3425         status = decode_op_hdr(xdr, OP_WRITE);
3426         if (status)
3427                 return status;
3428
3429         READ_BUF(16);
3430         READ32(res->count);
3431         READ32(res->verf->committed);
3432         COPYMEM(res->verf->verifier, 8);
3433         return 0;
3434 }
3435
3436 static int decode_delegreturn(struct xdr_stream *xdr)
3437 {
3438         return decode_op_hdr(xdr, OP_DELEGRETURN);
3439 }
3440
3441 /*
3442  * Decode OPEN_DOWNGRADE response
3443  */
3444 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3445 {
3446         struct xdr_stream xdr;
3447         struct compound_hdr hdr;
3448         int status;
3449
3450         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3451         status = decode_compound_hdr(&xdr, &hdr);
3452         if (status)
3453                 goto out;
3454         status = decode_putfh(&xdr);
3455         if (status)
3456                 goto out;
3457         status = decode_open_downgrade(&xdr, res);
3458         if (status != 0)
3459                 goto out;
3460         decode_getfattr(&xdr, res->fattr, res->server);
3461 out:
3462         return status;
3463 }
3464
3465 /*
3466  * END OF "GENERIC" DECODE ROUTINES.
3467  */
3468
3469 /*
3470  * Decode ACCESS response
3471  */
3472 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3473 {
3474         struct xdr_stream xdr;
3475         struct compound_hdr hdr;
3476         int status;
3477
3478         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3479         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3480                 goto out;
3481         if ((status = decode_putfh(&xdr)) == 0)
3482                 status = decode_access(&xdr, res);
3483 out:
3484         return status;
3485 }
3486
3487 /*
3488  * Decode LOOKUP response
3489  */
3490 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3491 {
3492         struct xdr_stream xdr;
3493         struct compound_hdr hdr;
3494         int status;
3495
3496         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3497         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3498                 goto out;
3499         if ((status = decode_putfh(&xdr)) != 0)
3500                 goto out;
3501         if ((status = decode_lookup(&xdr)) != 0)
3502                 goto out;
3503         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3504                 goto out;
3505         status = decode_getfattr(&xdr, res->fattr, res->server);
3506 out:
3507         return status;
3508 }
3509
3510 /*
3511  * Decode LOOKUP_ROOT response
3512  */
3513 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3514 {
3515         struct xdr_stream xdr;
3516         struct compound_hdr hdr;
3517         int status;
3518
3519         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3520         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3521                 goto out;
3522         if ((status = decode_putrootfh(&xdr)) != 0)
3523                 goto out;
3524         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3525                 status = decode_getfattr(&xdr, res->fattr, res->server);
3526 out:
3527         return status;
3528 }
3529
3530 /*
3531  * Decode REMOVE response
3532  */
3533 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3534 {
3535         struct xdr_stream xdr;
3536         struct compound_hdr hdr;
3537         int status;
3538
3539         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3540         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3541                 goto out;
3542         if ((status = decode_putfh(&xdr)) != 0)
3543                 goto out;
3544         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3545                 goto out;
3546         decode_getfattr(&xdr, res->dir_attr, res->server);
3547 out:
3548         return status;
3549 }
3550
3551 /*
3552  * Decode RENAME response
3553  */
3554 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3555 {
3556         struct xdr_stream xdr;
3557         struct compound_hdr hdr;
3558         int status;
3559
3560         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3561         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3562                 goto out;
3563         if ((status = decode_putfh(&xdr)) != 0)
3564                 goto out;
3565         if ((status = decode_savefh(&xdr)) != 0)
3566                 goto out;
3567         if ((status = decode_putfh(&xdr)) != 0)
3568                 goto out;
3569         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3570                 goto out;
3571         /* Current FH is target directory */
3572         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3573                 goto out;
3574         if ((status = decode_restorefh(&xdr)) != 0)
3575                 goto out;
3576         decode_getfattr(&xdr, res->old_fattr, res->server);
3577 out:
3578         return status;
3579 }
3580
3581 /*
3582  * Decode LINK response
3583  */
3584 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3585 {
3586         struct xdr_stream xdr;
3587         struct compound_hdr hdr;
3588         int status;
3589
3590         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3591         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3592                 goto out;
3593         if ((status = decode_putfh(&xdr)) != 0)
3594                 goto out;
3595         if ((status = decode_savefh(&xdr)) != 0)
3596                 goto out;
3597         if ((status = decode_putfh(&xdr)) != 0)
3598                 goto out;
3599         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3600                 goto out;
3601         /*
3602          * Note order: OP_LINK leaves the directory as the current
3603          *             filehandle.
3604          */
3605         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3606                 goto out;
3607         if ((status = decode_restorefh(&xdr)) != 0)
3608                 goto out;
3609         decode_getfattr(&xdr, res->fattr, res->server);
3610 out:
3611         return status;
3612 }
3613
3614 /*
3615  * Decode CREATE response
3616  */
3617 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3618 {
3619         struct xdr_stream xdr;
3620         struct compound_hdr hdr;
3621         int status;
3622
3623         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3624         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3625                 goto out;
3626         if ((status = decode_putfh(&xdr)) != 0)
3627                 goto out;
3628         if ((status = decode_savefh(&xdr)) != 0)
3629                 goto out;
3630         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3631                 goto out;
3632         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3633                 goto out;
3634         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3635                 goto out;
3636         if ((status = decode_restorefh(&xdr)) != 0)
3637                 goto out;
3638         decode_getfattr(&xdr, res->dir_fattr, res->server);
3639 out:
3640         return status;
3641 }
3642
3643 /*
3644  * Decode SYMLINK response
3645  */
3646 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3647 {
3648         return nfs4_xdr_dec_create(rqstp, p, res);
3649 }
3650
3651 /*
3652  * Decode GETATTR response
3653  */
3654 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3655 {
3656         struct xdr_stream xdr;
3657         struct compound_hdr hdr;
3658         int status;
3659
3660         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3661         status = decode_compound_hdr(&xdr, &hdr);
3662         if (status)
3663                 goto out;
3664         status = decode_putfh(&xdr);
3665         if (status)
3666                 goto out;
3667         status = decode_getfattr(&xdr, res->fattr, res->server);
3668 out:
3669         return status;
3670
3671 }
3672
3673 /*
3674  * Encode an SETACL request
3675  */
3676 static int
3677 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3678 {
3679         struct xdr_stream xdr;
3680         struct compound_hdr hdr = {
3681                 .nops   = 2,
3682         };
3683         int status;
3684
3685         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3686         encode_compound_hdr(&xdr, &hdr);
3687         status = encode_putfh(&xdr, args->fh);
3688         if (status)
3689                 goto out;
3690         status = encode_setacl(&xdr, args);
3691 out:
3692         return status;
3693 }
3694 /*
3695  * Decode SETACL response
3696  */
3697 static int
3698 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3699 {
3700         struct xdr_stream xdr;
3701         struct compound_hdr hdr;
3702         int status;
3703
3704         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3705         status = decode_compound_hdr(&xdr, &hdr);
3706         if (status)
3707                 goto out;
3708         status = decode_putfh(&xdr);
3709         if (status)
3710                 goto out;
3711         status = decode_setattr(&xdr, res);
3712 out:
3713         return status;
3714 }
3715
3716 /*
3717  * Decode GETACL response
3718  */
3719 static int
3720 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3721 {
3722         struct xdr_stream xdr;
3723         struct compound_hdr hdr;
3724         int status;
3725
3726         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3727         status = decode_compound_hdr(&xdr, &hdr);
3728         if (status)
3729                 goto out;
3730         status = decode_putfh(&xdr);
3731         if (status)
3732                 goto out;
3733         status = decode_getacl(&xdr, rqstp, acl_len);
3734
3735 out:
3736         return status;
3737 }
3738
3739 /*
3740  * Decode CLOSE response
3741  */
3742 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3743 {
3744         struct xdr_stream xdr;
3745         struct compound_hdr hdr;
3746         int status;
3747
3748         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3749         status = decode_compound_hdr(&xdr, &hdr);
3750         if (status)
3751                 goto out;
3752         status = decode_putfh(&xdr);
3753         if (status)
3754                 goto out;
3755         status = decode_close(&xdr, res);
3756         if (status != 0)
3757                 goto out;
3758         /*
3759          * Note: Server may do delete on close for this file
3760          *      in which case the getattr call will fail with
3761          *      an ESTALE error. Shouldn't be a problem,
3762          *      though, since fattr->valid will remain unset.
3763          */
3764         decode_getfattr(&xdr, res->fattr, res->server);
3765 out:
3766         return status;
3767 }
3768
3769 /*
3770  * Decode OPEN response
3771  */
3772 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3773 {
3774         struct xdr_stream xdr;
3775         struct compound_hdr hdr;
3776         int status;
3777
3778         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3779         status = decode_compound_hdr(&xdr, &hdr);
3780         if (status)
3781                 goto out;
3782         status = decode_putfh(&xdr);
3783         if (status)
3784                 goto out;
3785         status = decode_savefh(&xdr);
3786         if (status)
3787                 goto out;
3788         status = decode_open(&xdr, res);
3789         if (status)
3790                 goto out;
3791         status = decode_getfh(&xdr, &res->fh);
3792         if (status)
3793                 goto out;
3794         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3795                 goto out;
3796         if ((status = decode_restorefh(&xdr)) != 0)
3797                 goto out;
3798         decode_getfattr(&xdr, res->dir_attr, res->server);
3799 out:
3800         return status;
3801 }
3802
3803 /*
3804  * Decode OPEN_CONFIRM response
3805  */
3806 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3807 {
3808         struct xdr_stream xdr;
3809         struct compound_hdr hdr;
3810         int status;
3811
3812         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3813         status = decode_compound_hdr(&xdr, &hdr);
3814         if (status)
3815                 goto out;
3816         status = decode_putfh(&xdr);
3817         if (status)
3818                 goto out;
3819         status = decode_open_confirm(&xdr, res);
3820 out:
3821         return status;
3822 }
3823
3824 /*
3825  * Decode OPEN response
3826  */
3827 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3828 {
3829         struct xdr_stream xdr;
3830         struct compound_hdr hdr;
3831         int status;
3832
3833         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3834         status = decode_compound_hdr(&xdr, &hdr);
3835         if (status)
3836                 goto out;
3837         status = decode_putfh(&xdr);
3838         if (status)
3839                 goto out;
3840         status = decode_open(&xdr, res);
3841         if (status)
3842                 goto out;
3843         decode_getfattr(&xdr, res->f_attr, res->server);
3844 out:
3845         return status;
3846 }
3847
3848 /*
3849  * Decode SETATTR response
3850  */
3851 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3852 {
3853         struct xdr_stream xdr;
3854         struct compound_hdr hdr;
3855         int status;
3856
3857         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3858         status = decode_compound_hdr(&xdr, &hdr);
3859         if (status)
3860                 goto out;
3861         status = decode_putfh(&xdr);
3862         if (status)
3863                 goto out;
3864         status = decode_setattr(&xdr, res);
3865         if (status)
3866                 goto out;
3867         status = decode_getfattr(&xdr, res->fattr, res->server);
3868         if (status == NFS4ERR_DELAY)
3869                 status = 0;
3870 out:
3871         return status;
3872 }
3873
3874 /*
3875  * Decode LOCK response
3876  */
3877 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lock_res *res)
3878 {
3879         struct xdr_stream xdr;
3880         struct compound_hdr hdr;
3881         int status;
3882
3883         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3884         status = decode_compound_hdr(&xdr, &hdr);
3885         if (status)
3886                 goto out;
3887         status = decode_putfh(&xdr);
3888         if (status)
3889                 goto out;
3890         status = decode_lock(&xdr, res);
3891 out:
3892         return status;
3893 }
3894
3895 /*
3896  * Decode LOCKT response
3897  */
3898 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockt_res *res)
3899 {
3900         struct xdr_stream xdr;
3901         struct compound_hdr hdr;
3902         int status;
3903
3904         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3905         status = decode_compound_hdr(&xdr, &hdr);
3906         if (status)
3907                 goto out;
3908         status = decode_putfh(&xdr);
3909         if (status)
3910                 goto out;
3911         status = decode_lockt(&xdr, res);
3912 out:
3913         return status;
3914 }
3915
3916 /*
3917  * Decode LOCKU response
3918  */
3919 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_locku_res *res)
3920 {
3921         struct xdr_stream xdr;
3922         struct compound_hdr hdr;
3923         int status;
3924
3925         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3926         status = decode_compound_hdr(&xdr, &hdr);
3927         if (status)
3928                 goto out;
3929         status = decode_putfh(&xdr);
3930         if (status)
3931                 goto out;
3932         status = decode_locku(&xdr, res);
3933 out:
3934         return status;
3935 }
3936
3937 /*
3938  * Decode READLINK response
3939  */
3940 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3941 {
3942         struct xdr_stream xdr;
3943         struct compound_hdr hdr;
3944         int status;
3945
3946         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3947         status = decode_compound_hdr(&xdr, &hdr);
3948         if (status)
3949                 goto out;
3950         status = decode_putfh(&xdr);
3951         if (status)
3952                 goto out;
3953         status = decode_readlink(&xdr, rqstp);
3954 out:
3955         return status;
3956 }
3957
3958 /*
3959  * Decode READDIR response
3960  */
3961 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3962 {
3963         struct xdr_stream xdr;
3964         struct compound_hdr hdr;
3965         int status;
3966
3967         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3968         status = decode_compound_hdr(&xdr, &hdr);
3969         if (status)
3970                 goto out;
3971         status = decode_putfh(&xdr);
3972         if (status)
3973                 goto out;
3974         status = decode_readdir(&xdr, rqstp, res);
3975 out:
3976         return status;
3977 }
3978
3979 /*
3980  * Decode Read response
3981  */
3982 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3983 {
3984         struct xdr_stream xdr;
3985         struct compound_hdr hdr;
3986         int status;
3987
3988         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3989         status = decode_compound_hdr(&xdr, &hdr);
3990         if (status)
3991                 goto out;
3992         status = decode_putfh(&xdr);
3993         if (status)
3994                 goto out;
3995         status = decode_read(&xdr, rqstp, res);
3996         if (!status)
3997                 status = res->count;
3998 out:
3999         return status;
4000 }
4001
4002 /*
4003  * Decode WRITE response
4004  */
4005 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4006 {
4007         struct xdr_stream xdr;
4008         struct compound_hdr hdr;
4009         int status;
4010
4011         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4012         status = decode_compound_hdr(&xdr, &hdr);
4013         if (status)
4014                 goto out;
4015         status = decode_putfh(&xdr);
4016         if (status)
4017                 goto out;
4018         status = decode_write(&xdr, res);
4019         if (status)
4020                 goto out;
4021         decode_getfattr(&xdr, res->fattr, res->server);
4022         if (!status)
4023                 status = res->count;
4024 out:
4025         return status;
4026 }
4027
4028 /*
4029  * Decode COMMIT response
4030  */
4031 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4032 {
4033         struct xdr_stream xdr;
4034         struct compound_hdr hdr;
4035         int status;
4036
4037         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4038         status = decode_compound_hdr(&xdr, &hdr);
4039         if (status)
4040                 goto out;
4041         status = decode_putfh(&xdr);
4042         if (status)
4043                 goto out;
4044         status = decode_commit(&xdr, res);
4045         if (status)
4046                 goto out;
4047         decode_getfattr(&xdr, res->fattr, res->server);
4048 out:
4049         return status;
4050 }
4051
4052 /*
4053  * FSINFO request
4054  */
4055 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4056 {
4057         struct xdr_stream xdr;
4058         struct compound_hdr hdr;
4059         int status;
4060
4061         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4062         status = decode_compound_hdr(&xdr, &hdr);
4063         if (!status)
4064                 status = decode_putfh(&xdr);
4065         if (!status)
4066                 status = decode_fsinfo(&xdr, fsinfo);
4067         if (!status)
4068                 status = -nfs_stat_to_errno(hdr.status);
4069         return status;
4070 }
4071
4072 /*
4073  * PATHCONF request
4074  */
4075 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4076 {
4077         struct xdr_stream xdr;
4078         struct compound_hdr hdr;
4079         int status;
4080
4081         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4082         status = decode_compound_hdr(&xdr, &hdr);
4083         if (!status)
4084                 status = decode_putfh(&xdr);
4085         if (!status)
4086                 status = decode_pathconf(&xdr, pathconf);
4087         return status;
4088 }
4089
4090 /*
4091  * STATFS request
4092  */
4093 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4094 {
4095         struct xdr_stream xdr;
4096         struct compound_hdr hdr;
4097         int status;
4098
4099         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4100         status = decode_compound_hdr(&xdr, &hdr);
4101         if (!status)
4102                 status = decode_putfh(&xdr);
4103         if (!status)
4104                 status = decode_statfs(&xdr, fsstat);
4105         return status;
4106 }
4107
4108 /*
4109  * GETATTR_BITMAP request
4110  */
4111 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4112 {
4113         struct xdr_stream xdr;
4114         struct compound_hdr hdr;
4115         int status;
4116
4117         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4118         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4119                 goto out;
4120         if ((status = decode_putfh(&xdr)) != 0)
4121                 goto out;
4122         status = decode_server_caps(&xdr, res);
4123 out:
4124         return status;
4125 }
4126
4127 /*
4128  * Decode RENEW response
4129  */
4130 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4131 {
4132         struct xdr_stream xdr;
4133         struct compound_hdr hdr;
4134         int status;
4135
4136         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4137         status = decode_compound_hdr(&xdr, &hdr);
4138         if (!status)
4139                 status = decode_renew(&xdr);
4140         return status;
4141 }
4142
4143 /*
4144  * a SETCLIENTID request
4145  */
4146 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4147                 struct nfs4_client *clp)
4148 {
4149         struct xdr_stream xdr;
4150         struct compound_hdr hdr;
4151         int status;
4152
4153         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4154         status = decode_compound_hdr(&xdr, &hdr);
4155         if (!status)
4156                 status = decode_setclientid(&xdr, clp);
4157         if (!status)
4158                 status = -nfs_stat_to_errno(hdr.status);
4159         return status;
4160 }
4161
4162 /*
4163  * a SETCLIENTID_CONFIRM request
4164  */
4165 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4166 {
4167         struct xdr_stream xdr;
4168         struct compound_hdr hdr;
4169         int status;
4170
4171         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4172         status = decode_compound_hdr(&xdr, &hdr);
4173         if (!status)
4174                 status = decode_setclientid_confirm(&xdr);
4175         if (!status)
4176                 status = decode_putrootfh(&xdr);
4177         if (!status)
4178                 status = decode_fsinfo(&xdr, fsinfo);
4179         if (!status)
4180                 status = -nfs_stat_to_errno(hdr.status);
4181         return status;
4182 }
4183
4184 /*
4185  * DELEGRETURN request
4186  */
4187 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4188 {
4189         struct xdr_stream xdr;
4190         struct compound_hdr hdr;
4191         int status;
4192
4193         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4194         status = decode_compound_hdr(&xdr, &hdr);
4195         if (status == 0) {
4196                 status = decode_putfh(&xdr);
4197                 if (status == 0)
4198                         status = decode_delegreturn(&xdr);
4199         }
4200         return status;
4201 }
4202
4203 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4204 {
4205         uint32_t bitmap[2] = {0};
4206         uint32_t len;
4207
4208         if (!*p++) {
4209                 if (!*p)
4210                         return ERR_PTR(-EAGAIN);
4211                 entry->eof = 1;
4212                 return ERR_PTR(-EBADCOOKIE);
4213         }
4214
4215         entry->prev_cookie = entry->cookie;
4216         p = xdr_decode_hyper(p, &entry->cookie);
4217         entry->len = ntohl(*p++);
4218         entry->name = (const char *) p;
4219         p += XDR_QUADLEN(entry->len);
4220
4221         /*
4222          * In case the server doesn't return an inode number,
4223          * we fake one here.  (We don't use inode number 0,
4224          * since glibc seems to choke on it...)
4225          */
4226         entry->ino = 1;
4227
4228         len = ntohl(*p++);              /* bitmap length */
4229         if (len-- > 0) {
4230                 bitmap[0] = ntohl(*p++);
4231                 if (len-- > 0) {
4232                         bitmap[1] = ntohl(*p++);
4233                         p += len;
4234                 }
4235         }
4236         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4237         if (len > 0) {
4238                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4239                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4240                         /* Ignore the return value of rdattr_error for now */
4241                         p++;
4242                         len--;
4243                 }
4244                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4245                         xdr_decode_hyper(p, &entry->ino);
4246                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4247                         xdr_decode_hyper(p, &entry->ino);
4248                 p += len;
4249         }
4250
4251         entry->eof = !p[0] && p[1];
4252         return p;
4253 }
4254
4255 /*
4256  * We need to translate between nfs status return values and
4257  * the local errno values which may not be the same.
4258  */
4259 static struct {
4260         int stat;
4261         int errno;
4262 } nfs_errtbl[] = {
4263         { NFS4_OK,              0               },
4264         { NFS4ERR_PERM,         EPERM           },
4265         { NFS4ERR_NOENT,        ENOENT          },
4266         { NFS4ERR_IO,           errno_NFSERR_IO },
4267         { NFS4ERR_NXIO,         ENXIO           },
4268         { NFS4ERR_ACCESS,       EACCES          },
4269         { NFS4ERR_EXIST,        EEXIST          },
4270         { NFS4ERR_XDEV,         EXDEV           },
4271         { NFS4ERR_NOTDIR,       ENOTDIR         },
4272         { NFS4ERR_ISDIR,        EISDIR          },
4273         { NFS4ERR_INVAL,        EINVAL          },
4274         { NFS4ERR_FBIG,         EFBIG           },
4275         { NFS4ERR_NOSPC,        ENOSPC          },
4276         { NFS4ERR_ROFS,         EROFS           },
4277         { NFS4ERR_MLINK,        EMLINK          },
4278         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4279         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4280         { NFS4ERR_DQUOT,        EDQUOT          },
4281         { NFS4ERR_STALE,        ESTALE          },
4282         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4283         { NFS4ERR_BADOWNER,     EINVAL          },
4284         { NFS4ERR_BADNAME,      EINVAL          },
4285         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4286         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4287         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4288         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4289         { NFS4ERR_BADTYPE,      EBADTYPE        },
4290         { NFS4ERR_LOCKED,       EAGAIN          },
4291         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4292         { NFS4ERR_SYMLINK,      ELOOP           },
4293         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4294         { NFS4ERR_DEADLOCK,     EDEADLK         },
4295         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4296                                                     * to be handled by a
4297                                                     * middle-layer.
4298                                                     */
4299         { -1,                   EIO             }
4300 };
4301
4302 /*
4303  * Convert an NFS error code to a local one.
4304  * This one is used jointly by NFSv2 and NFSv3.
4305  */
4306 static int
4307 nfs_stat_to_errno(int stat)
4308 {
4309         int i;
4310         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4311                 if (nfs_errtbl[i].stat == stat)
4312                         return nfs_errtbl[i].errno;
4313         }
4314         if (stat <= 10000 || stat > 10100) {
4315                 /* The server is looney tunes. */
4316                 return ESERVERFAULT;
4317         }
4318         /* If we cannot translate the error, the recovery routines should
4319          * handle it.
4320          * Note: remaining NFSv4 error codes have values > 10000, so should
4321          * not conflict with native Linux error codes.
4322          */
4323         return stat;
4324 }
4325
4326 #ifndef MAX
4327 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4328 #endif
4329
4330 #define PROC(proc, argtype, restype)                            \
4331 [NFSPROC4_CLNT_##proc] = {                                      \
4332         .p_proc   = NFSPROC4_COMPOUND,                          \
4333         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4334         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4335         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4336     }
4337
4338 struct rpc_procinfo     nfs4_procedures[] = {
4339   PROC(READ,            enc_read,       dec_read),
4340   PROC(WRITE,           enc_write,      dec_write),
4341   PROC(COMMIT,          enc_commit,     dec_commit),
4342   PROC(OPEN,            enc_open,       dec_open),
4343   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4344   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4345   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4346   PROC(CLOSE,           enc_close,      dec_close),
4347   PROC(SETATTR,         enc_setattr,    dec_setattr),
4348   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4349   PROC(RENEW,           enc_renew,      dec_renew),
4350   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4351   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4352   PROC(LOCK,            enc_lock,       dec_lock),
4353   PROC(LOCKT,           enc_lockt,      dec_lockt),
4354   PROC(LOCKU,           enc_locku,      dec_locku),
4355   PROC(ACCESS,          enc_access,     dec_access),
4356   PROC(GETATTR,         enc_getattr,    dec_getattr),
4357   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4358   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4359   PROC(REMOVE,          enc_remove,     dec_remove),
4360   PROC(RENAME,          enc_rename,     dec_rename),
4361   PROC(LINK,            enc_link,       dec_link),
4362   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4363   PROC(CREATE,          enc_create,     dec_create),
4364   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4365   PROC(STATFS,          enc_statfs,     dec_statfs),
4366   PROC(READLINK,        enc_readlink,   dec_readlink),
4367   PROC(READDIR,         enc_readdir,    dec_readdir),
4368   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4369   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4370   PROC(GETACL,          enc_getacl,     dec_getacl),
4371   PROC(SETACL,          enc_setacl,     dec_setacl),
4372 };
4373
4374 struct rpc_version              nfs_version4 = {
4375         .number                 = 4,
4376         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4377         .procs                  = nfs4_procedures
4378 };
4379
4380 /*
4381  * Local variables:
4382  *  c-basic-offset: 8
4383  * End:
4384  */