git.oblomov.eu Git - linux-2.6/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define owner_id_maxsz          (1 + 1)
  74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define op_encode_hdr_maxsz     (1)
  77 #define op_decode_hdr_maxsz     (2)
  78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  79                                 (NFS4_FHSIZE >> 2))
  80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  85                                 ((3+NFS4_FHSIZE) >> 2))
  86 #define nfs4_fattr_bitmap_maxsz 3
  87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  90 /* This is based on getfattr, which uses the most attributes: */
  91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
  93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  94                                 nfs4_fattr_value_maxsz)
  95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
  97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
  98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
  99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 104 #define encode_setclientid_maxsz \
 105                                 (op_encode_hdr_maxsz + \
 106                                 4 /*server->ip_addr*/ + \
 107                                 1 /*Netid*/ + \
 108                                 6 /*uaddr*/ + \
 109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 110 #define decode_setclientid_maxsz \
 111                                 (op_decode_hdr_maxsz + \
 112                                 2 + \
 113                                 1024) /* large value for CLID_INUSE */
 114 #define encode_setclientid_confirm_maxsz \
 115                                 (op_encode_hdr_maxsz + \
 116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 117 #define decode_setclientid_confirm_maxsz \
 118                                 (op_decode_hdr_maxsz)
 119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 122                                 nfs4_name_maxsz)
 123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 124                                 2 * nfs4_name_maxsz)
 125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 127                                 nfs4_name_maxsz)
 128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 130                                 1 + nfs4_name_maxsz + \
 131                                 nfs4_path_maxsz + \
 132                                 nfs4_fattr_maxsz)
 133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 135                                 2 + nfs4_name_maxsz + \
 136                                 nfs4_fattr_maxsz)
 137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 143                                 encode_putfh_maxsz + \
 144                                 op_encode_hdr_maxsz + 7)
 145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 146                                 decode_putfh_maxsz + \
 147                                 op_decode_hdr_maxsz + 2)
 148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 149                                 encode_putfh_maxsz + \
 150                                 op_encode_hdr_maxsz)
 151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 152                                 decode_putfh_maxsz + \
 153                                 op_decode_hdr_maxsz)
 154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 155                                 encode_putfh_maxsz + \
 156                                 op_encode_hdr_maxsz + 9)
 157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 158                                 decode_putfh_maxsz + \
 159                                 op_decode_hdr_maxsz + 2)
 160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 161                                 encode_putfh_maxsz + \
 162                                 op_encode_hdr_maxsz + 8 + \
 163                                 encode_getattr_maxsz)
 164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 165                                 decode_putfh_maxsz + \
 166                                 op_decode_hdr_maxsz + 4 + \
 167                                 decode_getattr_maxsz)
 168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 169                                 encode_putfh_maxsz + \
 170                                 op_encode_hdr_maxsz + 3 + \
 171                                 encode_getattr_maxsz)
 172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 173                                 decode_putfh_maxsz + \
 174                                 op_decode_hdr_maxsz + 2 + \
 175                                 decode_getattr_maxsz)
 176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 177                                 encode_putfh_maxsz + \
 178                                 op_encode_hdr_maxsz + \
 179                                 13 + 3 + 2 + 64 + \
 180                                 encode_getattr_maxsz + \
 181                                 encode_getfh_maxsz)
 182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 183                                 decode_putfh_maxsz + \
 184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 185                                 decode_getattr_maxsz + \
 186                                 decode_getfh_maxsz)
 187 #define NFS4_enc_open_confirm_sz      \
 188                                 (compound_encode_hdr_maxsz + \
 189                                 encode_putfh_maxsz + \
 190                                 op_encode_hdr_maxsz + 5)
 191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 192                                         decode_putfh_maxsz + \
 193                                         op_decode_hdr_maxsz + 4)
 194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 195                                         encode_putfh_maxsz + \
 196                                         op_encode_hdr_maxsz + \
 197                                         11)
 198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 199                                         decode_putfh_maxsz + \
 200                                         op_decode_hdr_maxsz + \
 201                                         4 + 5 + 2 + 3)
 202 #define NFS4_enc_open_downgrade_sz \
 203                                 (compound_encode_hdr_maxsz + \
 204                                 encode_putfh_maxsz + \
 205                                 op_encode_hdr_maxsz + 7 + \
 206                                 encode_getattr_maxsz)
 207 #define NFS4_dec_open_downgrade_sz \
 208                                 (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 op_decode_hdr_maxsz + 4 + \
 211                                 decode_getattr_maxsz)
 212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 213                                 encode_putfh_maxsz + \
 214                                 op_encode_hdr_maxsz + 5 + \
 215                                 encode_getattr_maxsz)
 216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 217                                 decode_putfh_maxsz + \
 218                                 op_decode_hdr_maxsz + 4 + \
 219                                 decode_getattr_maxsz)
 220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 221                                 encode_putfh_maxsz + \
 222                                 op_encode_hdr_maxsz + 4 + \
 223                                 nfs4_fattr_maxsz + \
 224                                 encode_getattr_maxsz)
 225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 226                                 decode_putfh_maxsz + \
 227                                 op_decode_hdr_maxsz + 3)
 228 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 229                                 encode_putfh_maxsz + \
 230                                 encode_fsinfo_maxsz)
 231 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 232                                 decode_putfh_maxsz + \
 233                                 decode_fsinfo_maxsz)
 234 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 235                                 encode_renew_maxsz)
 236 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 237                                 decode_renew_maxsz)
 238 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 239                                 encode_setclientid_maxsz)
 240 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 241                                 decode_setclientid_maxsz)
 242 #define NFS4_enc_setclientid_confirm_sz \
 243                                 (compound_encode_hdr_maxsz + \
 244                                 encode_setclientid_confirm_maxsz + \
 245                                 encode_putrootfh_maxsz + \
 246                                 encode_fsinfo_maxsz)
 247 #define NFS4_dec_setclientid_confirm_sz \
 248                                 (compound_decode_hdr_maxsz + \
 249                                 decode_setclientid_confirm_maxsz + \
 250                                 decode_putrootfh_maxsz + \
 251                                 decode_fsinfo_maxsz)
 252 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 253                                 encode_putfh_maxsz + \
 254                                 encode_getattr_maxsz + \
 255                                 op_encode_hdr_maxsz + \
 256                                 1 + 1 + 2 + 2 + \
 257                                 1 + 4 + 1 + 2 + \
 258                                 owner_id_maxsz)
 259 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 260                                 decode_putfh_maxsz + \
 261                                 decode_getattr_maxsz + \
 262                                 op_decode_hdr_maxsz + \
 263                                 2 + 2 + 1 + 2 + \
 264                                 owner_id_maxsz)
 265 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 266                                 encode_putfh_maxsz + \
 267                                 encode_getattr_maxsz + \
 268                                 op_encode_hdr_maxsz + \
 269                                 1 + 2 + 2 + 2 + \
 270                                 owner_id_maxsz)
 271 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 272 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 273                                 encode_putfh_maxsz + \
 274                                 encode_getattr_maxsz + \
 275                                 op_encode_hdr_maxsz + \
 276                                 1 + 1 + 4 + 2 + 2)
 277 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 278                                 decode_putfh_maxsz + \
 279                                 decode_getattr_maxsz + \
 280                                 op_decode_hdr_maxsz + 4)
 281 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 282                                 encode_putfh_maxsz + \
 283                                 op_encode_hdr_maxsz + 1)
 284 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 op_decode_hdr_maxsz + 2)
 287 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 288                                 encode_putfh_maxsz + \
 289                                 encode_getattr_maxsz)
 290 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 291                                 decode_putfh_maxsz + \
 292                                 decode_getattr_maxsz)
 293 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 294                                 encode_putfh_maxsz + \
 295                                 encode_lookup_maxsz + \
 296                                 encode_getattr_maxsz + \
 297                                 encode_getfh_maxsz)
 298 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 299                                 decode_putfh_maxsz + \
 300                                 op_decode_hdr_maxsz + \
 301                                 decode_getattr_maxsz + \
 302                                 decode_getfh_maxsz)
 303 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 304                                 encode_putrootfh_maxsz + \
 305                                 encode_getattr_maxsz + \
 306                                 encode_getfh_maxsz)
 307 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 308                                 decode_putrootfh_maxsz + \
 309                                 decode_getattr_maxsz + \
 310                                 decode_getfh_maxsz)
 311 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_remove_maxsz + \
 314                                 encode_getattr_maxsz)
 315 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 op_decode_hdr_maxsz + 5 + \
 318                                 decode_getattr_maxsz)
 319 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_savefh_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_rename_maxsz + \
 324                                 encode_getattr_maxsz + \
 325                                 encode_restorefh_maxsz + \
 326                                 encode_getattr_maxsz)
 327 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 328                                 decode_putfh_maxsz + \
 329                                 decode_savefh_maxsz + \
 330                                 decode_putfh_maxsz + \
 331                                 decode_rename_maxsz + \
 332                                 decode_getattr_maxsz + \
 333                                 decode_restorefh_maxsz + \
 334                                 decode_getattr_maxsz)
 335 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_savefh_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_link_maxsz + \
 340                                 decode_getattr_maxsz + \
 341                                 encode_restorefh_maxsz + \
 342                                 decode_getattr_maxsz)
 343 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 344                                 decode_putfh_maxsz + \
 345                                 decode_savefh_maxsz + \
 346                                 decode_putfh_maxsz + \
 347                                 decode_link_maxsz + \
 348                                 decode_getattr_maxsz + \
 349                                 decode_restorefh_maxsz + \
 350                                 decode_getattr_maxsz)
 351 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_symlink_maxsz + \
 354                                 encode_getattr_maxsz + \
 355                                 encode_getfh_maxsz)
 356 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 357                                 decode_putfh_maxsz + \
 358                                 decode_symlink_maxsz + \
 359                                 decode_getattr_maxsz + \
 360                                 decode_getfh_maxsz)
 361 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_savefh_maxsz + \
 364                                 encode_create_maxsz + \
 365                                 encode_getfh_maxsz + \
 366                                 encode_getattr_maxsz + \
 367                                 encode_restorefh_maxsz + \
 368                                 encode_getattr_maxsz)
 369 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 370                                 decode_putfh_maxsz + \
 371                                 decode_savefh_maxsz + \
 372                                 decode_create_maxsz + \
 373                                 decode_getfh_maxsz + \
 374                                 decode_getattr_maxsz + \
 375                                 decode_restorefh_maxsz + \
 376                                 decode_getattr_maxsz)
 377 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_getattr_maxsz)
 380 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_getattr_maxsz)
 383 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_getattr_maxsz)
 386 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 op_decode_hdr_maxsz + 12)
 389 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 390                                 encode_getattr_maxsz)
 391 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_delegreturn_maxsz)
 396 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 397                                 decode_delegreturn_maxsz)
 398 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 399                                 encode_putfh_maxsz + \
 400                                 encode_getattr_maxsz)
 401 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 402                                 decode_putfh_maxsz + \
 403                                 op_decode_hdr_maxsz + \
 404                                 nfs4_fattr_bitmap_maxsz + 1)
 405 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 406                                 encode_putfh_maxsz + \
 407                                 op_encode_hdr_maxsz + 4 + \
 408                                 nfs4_fattr_bitmap_maxsz + 1)
 409 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 410                                 decode_putfh_maxsz + \
 411                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 412
 413 static struct {
 414         unsigned int    mode;
 415         unsigned int    nfs2type;
 416 } nfs_type2fmt[] = {
 417         { 0,            NFNON        },
 418         { S_IFREG,      NFREG        },
 419         { S_IFDIR,      NFDIR        },
 420         { S_IFBLK,      NFBLK        },
 421         { S_IFCHR,      NFCHR        },
 422         { S_IFLNK,      NFLNK        },
 423         { S_IFSOCK,     NFSOCK       },
 424         { S_IFIFO,      NFFIFO       },
 425         { 0,            NFNON        },
 426         { 0,            NFNON        },
 427 };
 428
 429 struct compound_hdr {
 430         int32_t         status;
 431         uint32_t        nops;
 432         uint32_t        taglen;
 433         char *          tag;
 434 };
 435
 436 /*
 437  * START OF "GENERIC" ENCODE ROUTINES.
 438  *   These may look a little ugly since they are imported from a "generic"
 439  * set of XDR encode/decode routines which are intended to be shared by
 440  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 441  *
 442  * If the pain of reading these is too great, it should be a straightforward
 443  * task to translate them into Linux-specific versions which are more
 444  * consistent with the style used in NFSv2/v3...
 445  */
 446 #define WRITE32(n)               *p++ = htonl(n)
 447 #define WRITE64(n)               do {                           \
 448         *p++ = htonl((uint32_t)((n) >> 32));                            \
 449         *p++ = htonl((uint32_t)(n));                                    \
 450 } while (0)
 451 #define WRITEMEM(ptr,nbytes)     do {                           \
 452         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 453 } while (0)
 454
 455 #define RESERVE_SPACE(nbytes)   do {                            \
 456         p = xdr_reserve_space(xdr, nbytes);                     \
 457         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 458         BUG_ON(!p);                                             \
 459 } while (0)
 460
 461 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 462 {
 463         uint32_t *p;
 464
 465         p = xdr_reserve_space(xdr, 4 + len);
 466         BUG_ON(p == NULL);
 467         xdr_encode_opaque(p, str, len);
 468 }
 469
 470 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 471 {
 472         uint32_t *p;
 473
 474         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 475         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 476         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 477         WRITE32(hdr->taglen);
 478         WRITEMEM(hdr->tag, hdr->taglen);
 479         WRITE32(NFS4_MINOR_VERSION);
 480         WRITE32(hdr->nops);
 481         return 0;
 482 }
 483
 484 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 485 {
 486         uint32_t *p;
 487
 488         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 489         BUG_ON(p == NULL);
 490         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 491 }
 492
 493 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 494 {
 495         char owner_name[IDMAP_NAMESZ];
 496         char owner_group[IDMAP_NAMESZ];
 497         int owner_namelen = 0;
 498         int owner_grouplen = 0;
 499         uint32_t *p;
 500         uint32_t *q;
 501         int len;
 502         uint32_t bmval0 = 0;
 503         uint32_t bmval1 = 0;
 504         int status;
 505
 506         /*
 507          * We reserve enough space to write the entire attribute buffer at once.
 508          * In the worst-case, this would be
 509          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 510          *          = 36 bytes, plus any contribution from variable-length fields
 511          *            such as owner/group.
 512          */
 513         len = 16;
 514
 515         /* Sigh */
 516         if (iap->ia_valid & ATTR_SIZE)
 517                 len += 8;
 518         if (iap->ia_valid & ATTR_MODE)
 519                 len += 4;
 520         if (iap->ia_valid & ATTR_UID) {
 521                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
 522                 if (owner_namelen < 0) {
 523                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 524                                iap->ia_uid);
 525                         /* XXX */
 526                         strcpy(owner_name, "nobody");
 527                         owner_namelen = sizeof("nobody") - 1;
 528                         /* goto out; */
 529                 }
 530                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 531         }
 532         if (iap->ia_valid & ATTR_GID) {
 533                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
 534                 if (owner_grouplen < 0) {
 535                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 536                                iap->ia_gid);
 537                         strcpy(owner_group, "nobody");
 538                         owner_grouplen = sizeof("nobody") - 1;
 539                         /* goto out; */
 540                 }
 541                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 542         }
 543         if (iap->ia_valid & ATTR_ATIME_SET)
 544                 len += 16;
 545         else if (iap->ia_valid & ATTR_ATIME)
 546                 len += 4;
 547         if (iap->ia_valid & ATTR_MTIME_SET)
 548                 len += 16;
 549         else if (iap->ia_valid & ATTR_MTIME)
 550                 len += 4;
 551         RESERVE_SPACE(len);
 552
 553         /*
 554          * We write the bitmap length now, but leave the bitmap and the attribute
 555          * buffer length to be backfilled at the end of this routine.
 556          */
 557         WRITE32(2);
 558         q = p;
 559         p += 3;
 560
 561         if (iap->ia_valid & ATTR_SIZE) {
 562                 bmval0 |= FATTR4_WORD0_SIZE;
 563                 WRITE64(iap->ia_size);
 564         }
 565         if (iap->ia_valid & ATTR_MODE) {
 566                 bmval1 |= FATTR4_WORD1_MODE;
 567                 WRITE32(iap->ia_mode);
 568         }
 569         if (iap->ia_valid & ATTR_UID) {
 570                 bmval1 |= FATTR4_WORD1_OWNER;
 571                 WRITE32(owner_namelen);
 572                 WRITEMEM(owner_name, owner_namelen);
 573         }
 574         if (iap->ia_valid & ATTR_GID) {
 575                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 576                 WRITE32(owner_grouplen);
 577                 WRITEMEM(owner_group, owner_grouplen);
 578         }
 579         if (iap->ia_valid & ATTR_ATIME_SET) {
 580                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 581                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 582                 WRITE32(0);
 583                 WRITE32(iap->ia_mtime.tv_sec);
 584                 WRITE32(iap->ia_mtime.tv_nsec);
 585         }
 586         else if (iap->ia_valid & ATTR_ATIME) {
 587                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 588                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 589         }
 590         if (iap->ia_valid & ATTR_MTIME_SET) {
 591                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 592                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 593                 WRITE32(0);
 594                 WRITE32(iap->ia_mtime.tv_sec);
 595                 WRITE32(iap->ia_mtime.tv_nsec);
 596         }
 597         else if (iap->ia_valid & ATTR_MTIME) {
 598                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 599                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 600         }
 601
 602         /*
 603          * Now we backfill the bitmap and the attribute buffer length.
 604          */
 605         if (len != ((char *)p - (char *)q) + 4) {
 606                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 607                                 len, ((char *)p - (char *)q) + 4);
 608                 BUG();
 609         }
 610         len = (char *)p - (char *)q - 12;
 611         *q++ = htonl(bmval0);
 612         *q++ = htonl(bmval1);
 613         *q++ = htonl(len);
 614
 615         status = 0;
 616 /* out: */
 617         return status;
 618 }
 619
 620 static int encode_access(struct xdr_stream *xdr, u32 access)
 621 {
 622         uint32_t *p;
 623
 624         RESERVE_SPACE(8);
 625         WRITE32(OP_ACCESS);
 626         WRITE32(access);
 627
 628         return 0;
 629 }
 630
 631 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 632 {
 633         uint32_t *p;
 634
 635         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 636         WRITE32(OP_CLOSE);
 637         WRITE32(arg->seqid->sequence->counter);
 638         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 639
 640         return 0;
 641 }
 642
 643 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 644 {
 645         uint32_t *p;
 646
 647         RESERVE_SPACE(16);
 648         WRITE32(OP_COMMIT);
 649         WRITE64(args->offset);
 650         WRITE32(args->count);
 651
 652         return 0;
 653 }
 654
 655 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 656 {
 657         uint32_t *p;
 658
 659         RESERVE_SPACE(8);
 660         WRITE32(OP_CREATE);
 661         WRITE32(create->ftype);
 662
 663         switch (create->ftype) {
 664         case NF4LNK:
 665                 RESERVE_SPACE(4 + create->u.symlink->len);
 666                 WRITE32(create->u.symlink->len);
 667                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
 668                 break;
 669
 670         case NF4BLK: case NF4CHR:
 671                 RESERVE_SPACE(8);
 672                 WRITE32(create->u.device.specdata1);
 673                 WRITE32(create->u.device.specdata2);
 674                 break;
 675
 676         default:
 677                 break;
 678         }
 679
 680         RESERVE_SPACE(4 + create->name->len);
 681         WRITE32(create->name->len);
 682         WRITEMEM(create->name->name, create->name->len);
 683
 684         return encode_attrs(xdr, create->attrs, create->server);
 685 }
 686
 687 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 688 {
 689         uint32_t *p;
 690
 691         RESERVE_SPACE(12);
 692         WRITE32(OP_GETATTR);
 693         WRITE32(1);
 694         WRITE32(bitmap);
 695         return 0;
 696 }
 697
 698 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 699 {
 700         uint32_t *p;
 701
 702         RESERVE_SPACE(16);
 703         WRITE32(OP_GETATTR);
 704         WRITE32(2);
 705         WRITE32(bm0);
 706         WRITE32(bm1);
 707         return 0;
 708 }
 709
 710 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 711 {
 712         return encode_getattr_two(xdr,
 713                         bitmask[0] & nfs4_fattr_bitmap[0],
 714                         bitmask[1] & nfs4_fattr_bitmap[1]);
 715 }
 716
 717 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 718 {
 719         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 720                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 721 }
 722
 723 static int encode_getfh(struct xdr_stream *xdr)
 724 {
 725         uint32_t *p;
 726
 727         RESERVE_SPACE(4);
 728         WRITE32(OP_GETFH);
 729
 730         return 0;
 731 }
 732
 733 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 734 {
 735         uint32_t *p;
 736
 737         RESERVE_SPACE(8 + name->len);
 738         WRITE32(OP_LINK);
 739         WRITE32(name->len);
 740         WRITEMEM(name->name, name->len);
 741
 742         return 0;
 743 }
 744
 745 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         status = nfs_wait_on_sequence(args->lock_seqid, req->rq_task);
1619         if (status != 0)
1620                 goto out;
1621         /* Do we need to do an open_to_lock_owner? */
1622         if (args->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)
1623                 args->new_lock_owner = 0;
1624         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1625         encode_compound_hdr(&xdr, &hdr);
1626         status = encode_putfh(&xdr, args->fh);
1627         if(status)
1628                 goto out;
1629         status = encode_lock(&xdr, args);
1630 out:
1631         return status;
1632 }
1633
1634 /*
1635  * Encode a LOCKT request
1636  */
1637 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockt_args *args)
1638 {
1639         struct xdr_stream xdr;
1640         struct compound_hdr hdr = {
1641                 .nops   = 2,
1642         };
1643         int status;
1644
1645         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1646         encode_compound_hdr(&xdr, &hdr);
1647         status = encode_putfh(&xdr, args->fh);
1648         if(status)
1649                 goto out;
1650         status = encode_lockt(&xdr, args);
1651 out:
1652         return status;
1653 }
1654
1655 /*
1656  * Encode a LOCKU request
1657  */
1658 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_locku_args *args)
1659 {
1660         struct xdr_stream xdr;
1661         struct compound_hdr hdr = {
1662                 .nops   = 2,
1663         };
1664         int status;
1665
1666         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1667         encode_compound_hdr(&xdr, &hdr);
1668         status = encode_putfh(&xdr, args->fh);
1669         if(status)
1670                 goto out;
1671         status = encode_locku(&xdr, args);
1672 out:
1673         return status;
1674 }
1675
1676 /*
1677  * Encode a READLINK request
1678  */
1679 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1680 {
1681         struct xdr_stream xdr;
1682         struct compound_hdr hdr = {
1683                 .nops = 2,
1684         };
1685         int status;
1686
1687         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1688         encode_compound_hdr(&xdr, &hdr);
1689         status = encode_putfh(&xdr, args->fh);
1690         if(status)
1691                 goto out;
1692         status = encode_readlink(&xdr, args, req);
1693 out:
1694         return status;
1695 }
1696
1697 /*
1698  * Encode a READDIR request
1699  */
1700 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1701 {
1702         struct xdr_stream xdr;
1703         struct compound_hdr hdr = {
1704                 .nops = 2,
1705         };
1706         int status;
1707
1708         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1709         encode_compound_hdr(&xdr, &hdr);
1710         status = encode_putfh(&xdr, args->fh);
1711         if(status)
1712                 goto out;
1713         status = encode_readdir(&xdr, args, req);
1714 out:
1715         return status;
1716 }
1717
1718 /*
1719  * Encode a READ request
1720  */
1721 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1722 {
1723         struct rpc_auth *auth = req->rq_task->tk_auth;
1724         struct xdr_stream xdr;
1725         struct compound_hdr hdr = {
1726                 .nops = 2,
1727         };
1728         int replen, status;
1729
1730         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1731         encode_compound_hdr(&xdr, &hdr);
1732         status = encode_putfh(&xdr, args->fh);
1733         if (status)
1734                 goto out;
1735         status = encode_read(&xdr, args);
1736         if (status)
1737                 goto out;
1738
1739         /* set up reply kvec
1740          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1741          *       + OP_READ + status + eof + datalen = 9
1742          */
1743         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1744         xdr_inline_pages(&req->rq_rcv_buf, replen,
1745                          args->pages, args->pgbase, args->count);
1746 out:
1747         return status;
1748 }
1749
1750 /*
1751  * Encode an SETATTR request
1752  */
1753 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1754
1755 {
1756         struct xdr_stream xdr;
1757         struct compound_hdr hdr = {
1758                 .nops   = 3,
1759         };
1760         int status;
1761
1762         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1763         encode_compound_hdr(&xdr, &hdr);
1764         status = encode_putfh(&xdr, args->fh);
1765         if(status)
1766                 goto out;
1767         status = encode_setattr(&xdr, args, args->server);
1768         if(status)
1769                 goto out;
1770         status = encode_getfattr(&xdr, args->bitmask);
1771 out:
1772         return status;
1773 }
1774
1775 /*
1776  * Encode a GETACL request
1777  */
1778 static int
1779 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1780                 struct nfs_getaclargs *args)
1781 {
1782         struct xdr_stream xdr;
1783         struct rpc_auth *auth = req->rq_task->tk_auth;
1784         struct compound_hdr hdr = {
1785                 .nops   = 2,
1786         };
1787         int replen, status;
1788
1789         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1790         encode_compound_hdr(&xdr, &hdr);
1791         status = encode_putfh(&xdr, args->fh);
1792         if (status)
1793                 goto out;
1794         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1795         /* set up reply buffer: */
1796         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1797         xdr_inline_pages(&req->rq_rcv_buf, replen,
1798                 args->acl_pages, args->acl_pgbase, args->acl_len);
1799 out:
1800         return status;
1801 }
1802
1803 /*
1804  * Encode a WRITE request
1805  */
1806 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1807 {
1808         struct xdr_stream xdr;
1809         struct compound_hdr hdr = {
1810                 .nops = 3,
1811         };
1812         int status;
1813
1814         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1815         encode_compound_hdr(&xdr, &hdr);
1816         status = encode_putfh(&xdr, args->fh);
1817         if (status)
1818                 goto out;
1819         status = encode_write(&xdr, args);
1820         if (status)
1821                 goto out;
1822         status = encode_getfattr(&xdr, args->bitmask);
1823 out:
1824         return status;
1825 }
1826
1827 /*
1828  *  a COMMIT request
1829  */
1830 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1831 {
1832         struct xdr_stream xdr;
1833         struct compound_hdr hdr = {
1834                 .nops = 3,
1835         };
1836         int status;
1837
1838         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1839         encode_compound_hdr(&xdr, &hdr);
1840         status = encode_putfh(&xdr, args->fh);
1841         if (status)
1842                 goto out;
1843         status = encode_commit(&xdr, args);
1844         if (status)
1845                 goto out;
1846         status = encode_getfattr(&xdr, args->bitmask);
1847 out:
1848         return status;
1849 }
1850
1851 /*
1852  * FSINFO request
1853  */
1854 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1855 {
1856         struct xdr_stream xdr;
1857         struct compound_hdr hdr = {
1858                 .nops   = 2,
1859         };
1860         int status;
1861
1862         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1863         encode_compound_hdr(&xdr, &hdr);
1864         status = encode_putfh(&xdr, args->fh);
1865         if (!status)
1866                 status = encode_fsinfo(&xdr, args->bitmask);
1867         return status;
1868 }
1869
1870 /*
1871  * a PATHCONF request
1872  */
1873 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1874 {
1875         struct xdr_stream xdr;
1876         struct compound_hdr hdr = {
1877                 .nops = 2,
1878         };
1879         int status;
1880
1881         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1882         encode_compound_hdr(&xdr, &hdr);
1883         status = encode_putfh(&xdr, args->fh);
1884         if (!status)
1885                 status = encode_getattr_one(&xdr,
1886                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1887         return status;
1888 }
1889
1890 /*
1891  * a STATFS request
1892  */
1893 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1894 {
1895         struct xdr_stream xdr;
1896         struct compound_hdr hdr = {
1897                 .nops = 2,
1898         };
1899         int status;
1900
1901         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1902         encode_compound_hdr(&xdr, &hdr);
1903         status = encode_putfh(&xdr, args->fh);
1904         if (status == 0)
1905                 status = encode_getattr_two(&xdr,
1906                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1907                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1908         return status;
1909 }
1910
1911 /*
1912  * GETATTR_BITMAP request
1913  */
1914 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1915 {
1916         struct xdr_stream xdr;
1917         struct compound_hdr hdr = {
1918                 .nops = 2,
1919         };
1920         int status;
1921
1922         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1923         encode_compound_hdr(&xdr, &hdr);
1924         status = encode_putfh(&xdr, fhandle);
1925         if (status == 0)
1926                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1927                                 FATTR4_WORD0_LINK_SUPPORT|
1928                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1929                                 FATTR4_WORD0_ACLSUPPORT);
1930         return status;
1931 }
1932
1933 /*
1934  * a RENEW request
1935  */
1936 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1937 {
1938         struct xdr_stream xdr;
1939         struct compound_hdr hdr = {
1940                 .nops   = 1,
1941         };
1942
1943         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1944         encode_compound_hdr(&xdr, &hdr);
1945         return encode_renew(&xdr, clp);
1946 }
1947
1948 /*
1949  * a SETCLIENTID request
1950  */
1951 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1952 {
1953         struct xdr_stream xdr;
1954         struct compound_hdr hdr = {
1955                 .nops   = 1,
1956         };
1957
1958         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1959         encode_compound_hdr(&xdr, &hdr);
1960         return encode_setclientid(&xdr, sc);
1961 }
1962
1963 /*
1964  * a SETCLIENTID_CONFIRM request
1965  */
1966 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1967 {
1968         struct xdr_stream xdr;
1969         struct compound_hdr hdr = {
1970                 .nops   = 3,
1971         };
1972         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1973         int status;
1974
1975         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1976         encode_compound_hdr(&xdr, &hdr);
1977         status = encode_setclientid_confirm(&xdr, clp);
1978         if (!status)
1979                 status = encode_putrootfh(&xdr);
1980         if (!status)
1981                 status = encode_fsinfo(&xdr, lease_bitmap);
1982         return status;
1983 }
1984
1985 /*
1986  * DELEGRETURN request
1987  */
1988 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1989 {
1990         struct xdr_stream xdr;
1991         struct compound_hdr hdr = {
1992                 .nops = 2,
1993         };
1994         int status;
1995
1996         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1997         encode_compound_hdr(&xdr, &hdr);
1998         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1999                 status = encode_delegreturn(&xdr, args->stateid);
2000         return status;
2001 }
2002
2003 /*
2004  * START OF "GENERIC" DECODE ROUTINES.
2005  *   These may look a little ugly since they are imported from a "generic"
2006  * set of XDR encode/decode routines which are intended to be shared by
2007  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2008  *
2009  * If the pain of reading these is too great, it should be a straightforward
2010  * task to translate them into Linux-specific versions which are more
2011  * consistent with the style used in NFSv2/v3...
2012  */
2013 #define READ32(x)         (x) = ntohl(*p++)
2014 #define READ64(x)         do {                  \
2015         (x) = (u64)ntohl(*p++) << 32;           \
2016         (x) |= ntohl(*p++);                     \
2017 } while (0)
2018 #define READTIME(x)       do {                  \
2019         p++;                                    \
2020         (x.tv_sec) = ntohl(*p++);               \
2021         (x.tv_nsec) = ntohl(*p++);              \
2022 } while (0)
2023 #define COPYMEM(x,nbytes) do {                  \
2024         memcpy((x), p, nbytes);                 \
2025         p += XDR_QUADLEN(nbytes);               \
2026 } while (0)
2027
2028 #define READ_BUF(nbytes)  do { \
2029         p = xdr_inline_decode(xdr, nbytes); \
2030         if (!p) { \
2031                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2032                                 __FUNCTION__, __LINE__); \
2033                 return -EIO; \
2034         } \
2035 } while (0)
2036
2037 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
2038 {
2039         uint32_t *p;
2040
2041         READ_BUF(4);
2042         READ32(*len);
2043         READ_BUF(*len);
2044         *string = (char *)p;
2045         return 0;
2046 }
2047
2048 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2049 {
2050         uint32_t *p;
2051
2052         READ_BUF(8);
2053         READ32(hdr->status);
2054         READ32(hdr->taglen);
2055
2056         READ_BUF(hdr->taglen + 4);
2057         hdr->tag = (char *)p;
2058         p += XDR_QUADLEN(hdr->taglen);
2059         READ32(hdr->nops);
2060         return 0;
2061 }
2062
2063 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2064 {
2065         uint32_t *p;
2066         uint32_t opnum;
2067         int32_t nfserr;
2068
2069         READ_BUF(8);
2070         READ32(opnum);
2071         if (opnum != expected) {
2072                 printk(KERN_NOTICE
2073                                 "nfs4_decode_op_hdr: Server returned operation"
2074                                 " %d but we issued a request for %d\n",
2075                                 opnum, expected);
2076                 return -EIO;
2077         }
2078         READ32(nfserr);
2079         if (nfserr != NFS_OK)
2080                 return -nfs_stat_to_errno(nfserr);
2081         return 0;
2082 }
2083
2084 /* Dummy routine */
2085 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2086 {
2087         uint32_t *p;
2088         uint32_t strlen;
2089         char *str;
2090
2091         READ_BUF(12);
2092         return decode_opaque_inline(xdr, &strlen, &str);
2093 }
2094
2095 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2096 {
2097         uint32_t bmlen, *p;
2098
2099         READ_BUF(4);
2100         READ32(bmlen);
2101
2102         bitmap[0] = bitmap[1] = 0;
2103         READ_BUF((bmlen << 2));
2104         if (bmlen > 0) {
2105                 READ32(bitmap[0]);
2106                 if (bmlen > 1)
2107                         READ32(bitmap[1]);
2108         }
2109         return 0;
2110 }
2111
2112 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2113 {
2114         uint32_t *p;
2115
2116         READ_BUF(4);
2117         READ32(*attrlen);
2118         *savep = xdr->p;
2119         return 0;
2120 }
2121
2122 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2123 {
2124         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2125                 decode_attr_bitmap(xdr, bitmask);
2126                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2127         } else
2128                 bitmask[0] = bitmask[1] = 0;
2129         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2130         return 0;
2131 }
2132
2133 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2134 {
2135         uint32_t *p;
2136
2137         *type = 0;
2138         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2139                 return -EIO;
2140         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2141                 READ_BUF(4);
2142                 READ32(*type);
2143                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2144                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2145                         return -EIO;
2146                 }
2147                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2148         }
2149         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2150         return 0;
2151 }
2152
2153 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2154 {
2155         uint32_t *p;
2156
2157         *change = 0;
2158         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2159                 return -EIO;
2160         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2161                 READ_BUF(8);
2162                 READ64(*change);
2163                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2164         }
2165         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2166                         (unsigned long long)*change);
2167         return 0;
2168 }
2169
2170 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2171 {
2172         uint32_t *p;
2173
2174         *size = 0;
2175         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2176                 return -EIO;
2177         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2178                 READ_BUF(8);
2179                 READ64(*size);
2180                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2181         }
2182         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2183         return 0;
2184 }
2185
2186 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2187 {
2188         uint32_t *p;
2189
2190         *res = 0;
2191         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2192                 return -EIO;
2193         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2194                 READ_BUF(4);
2195                 READ32(*res);
2196                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2197         }
2198         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2199         return 0;
2200 }
2201
2202 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2203 {
2204         uint32_t *p;
2205
2206         *res = 0;
2207         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2208                 return -EIO;
2209         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2210                 READ_BUF(4);
2211                 READ32(*res);
2212                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2213         }
2214         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2215         return 0;
2216 }
2217
2218 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2219 {
2220         uint32_t *p;
2221
2222         fsid->major = 0;
2223         fsid->minor = 0;
2224         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2225                 return -EIO;
2226         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2227                 READ_BUF(16);
2228                 READ64(fsid->major);
2229                 READ64(fsid->minor);
2230                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2231         }
2232         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2233                         (unsigned long long)fsid->major,
2234                         (unsigned long long)fsid->minor);
2235         return 0;
2236 }
2237
2238 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2239 {
2240         uint32_t *p;
2241
2242         *res = 60;
2243         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2244                 return -EIO;
2245         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2246                 READ_BUF(4);
2247                 READ32(*res);
2248                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2249         }
2250         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2251         return 0;
2252 }
2253
2254 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2255 {
2256         uint32_t *p;
2257
2258         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2259         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2260                 return -EIO;
2261         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2262                 READ_BUF(4);
2263                 READ32(*res);
2264                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2265         }
2266         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2267         return 0;
2268 }
2269
2270 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2271 {
2272         uint32_t *p;
2273
2274         *fileid = 0;
2275         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2276                 return -EIO;
2277         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2278                 READ_BUF(8);
2279                 READ64(*fileid);
2280                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2281         }
2282         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2283         return 0;
2284 }
2285
2286 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2287 {
2288         uint32_t *p;
2289         int status = 0;
2290
2291         *res = 0;
2292         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2293                 return -EIO;
2294         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2295                 READ_BUF(8);
2296                 READ64(*res);
2297                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2298         }
2299         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2300         return status;
2301 }
2302
2303 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2304 {
2305         uint32_t *p;
2306         int status = 0;
2307
2308         *res = 0;
2309         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2310                 return -EIO;
2311         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2312                 READ_BUF(8);
2313                 READ64(*res);
2314                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2315         }
2316         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2317         return status;
2318 }
2319
2320 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2321 {
2322         uint32_t *p;
2323         int status = 0;
2324
2325         *res = 0;
2326         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2327                 return -EIO;
2328         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2329                 READ_BUF(8);
2330                 READ64(*res);
2331                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2332         }
2333         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2334         return status;
2335 }
2336
2337 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2338 {
2339         uint32_t *p;
2340         int status = 0;
2341
2342         *res = 0;
2343         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2344                 return -EIO;
2345         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2346                 READ_BUF(8);
2347                 READ64(*res);
2348                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2349         }
2350         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2351         return status;
2352 }
2353
2354 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2355 {
2356         uint32_t *p;
2357         int status = 0;
2358
2359         *maxlink = 1;
2360         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2361                 return -EIO;
2362         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2363                 READ_BUF(4);
2364                 READ32(*maxlink);
2365                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2366         }
2367         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2368         return status;
2369 }
2370
2371 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2372 {
2373         uint32_t *p;
2374         int status = 0;
2375
2376         *maxname = 1024;
2377         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2378                 return -EIO;
2379         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2380                 READ_BUF(4);
2381                 READ32(*maxname);
2382                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2383         }
2384         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2385         return status;
2386 }
2387
2388 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2389 {
2390         uint32_t *p;
2391         int status = 0;
2392
2393         *res = 1024;
2394         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2395                 return -EIO;
2396         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2397                 uint64_t maxread;
2398                 READ_BUF(8);
2399                 READ64(maxread);
2400                 if (maxread > 0x7FFFFFFF)
2401                         maxread = 0x7FFFFFFF;
2402                 *res = (uint32_t)maxread;
2403                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2404         }
2405         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2406         return status;
2407 }
2408
2409 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2410 {
2411         uint32_t *p;
2412         int status = 0;
2413
2414         *res = 1024;
2415         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2416                 return -EIO;
2417         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2418                 uint64_t maxwrite;
2419                 READ_BUF(8);
2420                 READ64(maxwrite);
2421                 if (maxwrite > 0x7FFFFFFF)
2422                         maxwrite = 0x7FFFFFFF;
2423                 *res = (uint32_t)maxwrite;
2424                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2425         }
2426         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2427         return status;
2428 }
2429
2430 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2431 {
2432         uint32_t *p;
2433
2434         *mode = 0;
2435         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2436                 return -EIO;
2437         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2438                 READ_BUF(4);
2439                 READ32(*mode);
2440                 *mode &= ~S_IFMT;
2441                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2442         }
2443         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2444         return 0;
2445 }
2446
2447 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2448 {
2449         uint32_t *p;
2450
2451         *nlink = 1;
2452         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2453                 return -EIO;
2454         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2455                 READ_BUF(4);
2456                 READ32(*nlink);
2457                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2458         }
2459         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2460         return 0;
2461 }
2462
2463 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2464 {
2465         uint32_t len, *p;
2466
2467         *uid = -2;
2468         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2469                 return -EIO;
2470         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2471                 READ_BUF(4);
2472                 READ32(len);
2473                 READ_BUF(len);
2474                 if (len < XDR_MAX_NETOBJ) {
2475                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2476                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2477                                                 __FUNCTION__);
2478                 } else
2479                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2480                                         __FUNCTION__, len);
2481                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2482         }
2483         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2484         return 0;
2485 }
2486
2487 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2488 {
2489         uint32_t len, *p;
2490
2491         *gid = -2;
2492         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2493                 return -EIO;
2494         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2495                 READ_BUF(4);
2496                 READ32(len);
2497                 READ_BUF(len);
2498                 if (len < XDR_MAX_NETOBJ) {
2499                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2500                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2501                                                 __FUNCTION__);
2502                 } else
2503                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2504                                         __FUNCTION__, len);
2505                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2506         }
2507         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2508         return 0;
2509 }
2510
2511 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2512 {
2513         uint32_t major = 0, minor = 0, *p;
2514
2515         *rdev = MKDEV(0,0);
2516         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2517                 return -EIO;
2518         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2519                 dev_t tmp;
2520
2521                 READ_BUF(8);
2522                 READ32(major);
2523                 READ32(minor);
2524                 tmp = MKDEV(major, minor);
2525                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2526                         *rdev = tmp;
2527                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2528         }
2529         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2530         return 0;
2531 }
2532
2533 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2534 {
2535         uint32_t *p;
2536         int status = 0;
2537
2538         *res = 0;
2539         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2540                 return -EIO;
2541         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2542                 READ_BUF(8);
2543                 READ64(*res);
2544                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2545         }
2546         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2547         return status;
2548 }
2549
2550 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2551 {
2552         uint32_t *p;
2553         int status = 0;
2554
2555         *res = 0;
2556         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2557                 return -EIO;
2558         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2559                 READ_BUF(8);
2560                 READ64(*res);
2561                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2562         }
2563         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2564         return status;
2565 }
2566
2567 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2568 {
2569         uint32_t *p;
2570         int status = 0;
2571
2572         *res = 0;
2573         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2574                 return -EIO;
2575         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2576                 READ_BUF(8);
2577                 READ64(*res);
2578                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2579         }
2580         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2581         return status;
2582 }
2583
2584 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2585 {
2586         uint32_t *p;
2587
2588         *used = 0;
2589         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2590                 return -EIO;
2591         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2592                 READ_BUF(8);
2593                 READ64(*used);
2594                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2595         }
2596         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2597                         (unsigned long long)*used);
2598         return 0;
2599 }
2600
2601 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2602 {
2603         uint32_t *p;
2604         uint64_t sec;
2605         uint32_t nsec;
2606
2607         READ_BUF(12);
2608         READ64(sec);
2609         READ32(nsec);
2610         time->tv_sec = (time_t)sec;
2611         time->tv_nsec = (long)nsec;
2612         return 0;
2613 }
2614
2615 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2616 {
2617         int status = 0;
2618
2619         time->tv_sec = 0;
2620         time->tv_nsec = 0;
2621         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2622                 return -EIO;
2623         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2624                 status = decode_attr_time(xdr, time);
2625                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2626         }
2627         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2628         return status;
2629 }
2630
2631 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2632 {
2633         int status = 0;
2634
2635         time->tv_sec = 0;
2636         time->tv_nsec = 0;
2637         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2638                 return -EIO;
2639         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2640                 status = decode_attr_time(xdr, time);
2641                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2642         }
2643         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2644         return status;
2645 }
2646
2647 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2648 {
2649         int status = 0;
2650
2651         time->tv_sec = 0;
2652         time->tv_nsec = 0;
2653         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2654                 return -EIO;
2655         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2656                 status = decode_attr_time(xdr, time);
2657                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2658         }
2659         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2660         return status;
2661 }
2662
2663 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2664 {
2665         unsigned int attrwords = XDR_QUADLEN(attrlen);
2666         unsigned int nwords = xdr->p - savep;
2667
2668         if (unlikely(attrwords != nwords)) {
2669                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2670                                 __FUNCTION__,
2671                                 attrwords << 2,
2672                                 (attrwords < nwords) ? '<' : '>',
2673                                 nwords << 2);
2674                 return -EIO;
2675         }
2676         return 0;
2677 }
2678
2679 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2680 {
2681         uint32_t *p;
2682
2683         READ_BUF(20);
2684         READ32(cinfo->atomic);
2685         READ64(cinfo->before);
2686         READ64(cinfo->after);
2687         return 0;
2688 }
2689
2690 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2691 {
2692         uint32_t *p;
2693         uint32_t supp, acc;
2694         int status;
2695
2696         status = decode_op_hdr(xdr, OP_ACCESS);
2697         if (status)
2698                 return status;
2699         READ_BUF(8);
2700         READ32(supp);
2701         READ32(acc);
2702         access->supported = supp;
2703         access->access = acc;
2704         return 0;
2705 }
2706
2707 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2708 {
2709         uint32_t *p;
2710         int status;
2711
2712         status = decode_op_hdr(xdr, OP_CLOSE);
2713         if (status)
2714                 return status;
2715         READ_BUF(sizeof(res->stateid.data));
2716         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2717         return 0;
2718 }
2719
2720 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2721 {
2722         uint32_t *p;
2723         int status;
2724
2725         status = decode_op_hdr(xdr, OP_COMMIT);
2726         if (status)
2727                 return status;
2728         READ_BUF(8);
2729         COPYMEM(res->verf->verifier, 8);
2730         return 0;
2731 }
2732
2733 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2734 {
2735         uint32_t *p;
2736         uint32_t bmlen;
2737         int status;
2738
2739         status = decode_op_hdr(xdr, OP_CREATE);
2740         if (status)
2741                 return status;
2742         if ((status = decode_change_info(xdr, cinfo)))
2743                 return status;
2744         READ_BUF(4);
2745         READ32(bmlen);
2746         READ_BUF(bmlen << 2);
2747         return 0;
2748 }
2749
2750 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2751 {
2752         uint32_t *savep;
2753         uint32_t attrlen,
2754                  bitmap[2] = {0};
2755         int status;
2756
2757         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2758                 goto xdr_error;
2759         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2760                 goto xdr_error;
2761         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2762                 goto xdr_error;
2763         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2764                 goto xdr_error;
2765         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2766                 goto xdr_error;
2767         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2768                 goto xdr_error;
2769         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2770                 goto xdr_error;
2771         status = verify_attr_len(xdr, savep, attrlen);
2772 xdr_error:
2773         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2774         return status;
2775 }
2776
2777 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2778 {
2779         uint32_t *savep;
2780         uint32_t attrlen,
2781                  bitmap[2] = {0};
2782         int status;
2783
2784         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2785                 goto xdr_error;
2786         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2787                 goto xdr_error;
2788         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2789                 goto xdr_error;
2790
2791         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2792                 goto xdr_error;
2793         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2794                 goto xdr_error;
2795         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2796                 goto xdr_error;
2797         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2798                 goto xdr_error;
2799         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2800                 goto xdr_error;
2801         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2802                 goto xdr_error;
2803
2804         status = verify_attr_len(xdr, savep, attrlen);
2805 xdr_error:
2806         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2807         return status;
2808 }
2809
2810 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2811 {
2812         uint32_t *savep;
2813         uint32_t attrlen,
2814                  bitmap[2] = {0};
2815         int status;
2816
2817         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2818                 goto xdr_error;
2819         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2820                 goto xdr_error;
2821         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2822                 goto xdr_error;
2823
2824         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2825                 goto xdr_error;
2826         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2827                 goto xdr_error;
2828
2829         status = verify_attr_len(xdr, savep, attrlen);
2830 xdr_error:
2831         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2832         return status;
2833 }
2834
2835 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2836 {
2837         uint32_t *savep;
2838         uint32_t attrlen,
2839                  bitmap[2] = {0},
2840                  type;
2841         int status, fmode = 0;
2842
2843         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2844                 goto xdr_error;
2845         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2846                 goto xdr_error;
2847
2848         fattr->bitmap[0] = bitmap[0];
2849         fattr->bitmap[1] = bitmap[1];
2850
2851         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2852                 goto xdr_error;
2853
2854
2855         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2856                 goto xdr_error;
2857         fattr->type = nfs_type2fmt[type].nfs2type;
2858         fmode = nfs_type2fmt[type].mode;
2859
2860         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2861                 goto xdr_error;
2862         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2863                 goto xdr_error;
2864         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2865                 goto xdr_error;
2866         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2867                 goto xdr_error;
2868         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2869                 goto xdr_error;
2870         fattr->mode |= fmode;
2871         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2872                 goto xdr_error;
2873         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2876                 goto xdr_error;
2877         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2878                 goto xdr_error;
2879         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2880                 goto xdr_error;
2881         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2882                 goto xdr_error;
2883         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2884                 goto xdr_error;
2885         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2886                 goto xdr_error;
2887         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2888                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2889 xdr_error:
2890         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2891         return status;
2892 }
2893
2894
2895 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2896 {
2897         uint32_t *savep;
2898         uint32_t attrlen, bitmap[2];
2899         int status;
2900
2901         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2902                 goto xdr_error;
2903         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2904                 goto xdr_error;
2905         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2906                 goto xdr_error;
2907
2908         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2909
2910         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2911                 goto xdr_error;
2912         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2913                 goto xdr_error;
2914         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2915                 goto xdr_error;
2916         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2917         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2918                 goto xdr_error;
2919         fsinfo->wtpref = fsinfo->wtmax;
2920
2921         status = verify_attr_len(xdr, savep, attrlen);
2922 xdr_error:
2923         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2924         return status;
2925 }
2926
2927 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2928 {
2929         uint32_t *p;
2930         uint32_t len;
2931         int status;
2932
2933         status = decode_op_hdr(xdr, OP_GETFH);
2934         if (status)
2935                 return status;
2936         /* Zero handle first to allow comparisons */
2937         memset(fh, 0, sizeof(*fh));
2938
2939         READ_BUF(4);
2940         READ32(len);
2941         if (len > NFS4_FHSIZE)
2942                 return -EIO;
2943         fh->size = len;
2944         READ_BUF(len);
2945         COPYMEM(fh->data, len);
2946         return 0;
2947 }
2948
2949 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2950 {
2951         int status;
2952
2953         status = decode_op_hdr(xdr, OP_LINK);
2954         if (status)
2955                 return status;
2956         return decode_change_info(xdr, cinfo);
2957 }
2958
2959 /*
2960  * We create the owner, so we know a proper owner.id length is 4.
2961  */
2962 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
2963 {
2964         uint64_t offset, length, clientid;
2965         uint32_t *p;
2966         uint32_t namelen, type;
2967
2968         READ_BUF(32);
2969         READ64(offset);
2970         READ64(length);
2971         READ32(type);
2972         if (fl != NULL) {
2973                 fl->fl_start = (loff_t)offset;
2974                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
2975                 if (length == ~(uint64_t)0)
2976                         fl->fl_end = OFFSET_MAX;
2977                 fl->fl_type = F_WRLCK;
2978                 if (type & 1)
2979                         fl->fl_type = F_RDLCK;
2980                 fl->fl_pid = 0;
2981         }
2982         READ64(clientid);
2983         READ32(namelen);
2984         READ_BUF(namelen);
2985         return -NFS4ERR_DENIED;
2986 }
2987
2988 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
2989 {
2990         uint32_t *p;
2991         int status;
2992
2993         status = decode_op_hdr(xdr, OP_LOCK);
2994         if (status == 0) {
2995                 READ_BUF(sizeof(res->stateid.data));
2996                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2997         } else if (status == -NFS4ERR_DENIED)
2998                 return decode_lock_denied(xdr, NULL);
2999         return status;
3000 }
3001
3002 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3003 {
3004         int status;
3005         status = decode_op_hdr(xdr, OP_LOCKT);
3006         if (status == -NFS4ERR_DENIED)
3007                 return decode_lock_denied(xdr, res->denied);
3008         return status;
3009 }
3010
3011 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3012 {
3013         uint32_t *p;
3014         int status;
3015
3016         status = decode_op_hdr(xdr, OP_LOCKU);
3017         if (status == 0) {
3018                 READ_BUF(sizeof(res->stateid.data));
3019                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3020         }
3021         return status;
3022 }
3023
3024 static int decode_lookup(struct xdr_stream *xdr)
3025 {
3026         return decode_op_hdr(xdr, OP_LOOKUP);
3027 }
3028
3029 /* This is too sick! */
3030 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3031 {
3032         uint32_t *p;
3033         uint32_t limit_type, nblocks, blocksize;
3034
3035         READ_BUF(12);
3036         READ32(limit_type);
3037         switch (limit_type) {
3038                 case 1:
3039                         READ64(*maxsize);
3040                         break;
3041                 case 2:
3042                         READ32(nblocks);
3043                         READ32(blocksize);
3044                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3045         }
3046         return 0;
3047 }
3048
3049 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3050 {
3051         uint32_t *p;
3052         uint32_t delegation_type;
3053
3054         READ_BUF(4);
3055         READ32(delegation_type);
3056         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3057                 res->delegation_type = 0;
3058                 return 0;
3059         }
3060         READ_BUF(20);
3061         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3062         READ32(res->do_recall);
3063         switch (delegation_type) {
3064                 case NFS4_OPEN_DELEGATE_READ:
3065                         res->delegation_type = FMODE_READ;
3066                         break;
3067                 case NFS4_OPEN_DELEGATE_WRITE:
3068                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3069                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3070                                 return -EIO;
3071         }
3072         return decode_ace(xdr, NULL, res->server->nfs4_state);
3073 }
3074
3075 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3076 {
3077         uint32_t *p;
3078         uint32_t bmlen;
3079         int status;
3080
3081         status = decode_op_hdr(xdr, OP_OPEN);
3082         if (status)
3083                 return status;
3084         READ_BUF(sizeof(res->stateid.data));
3085         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3086
3087         decode_change_info(xdr, &res->cinfo);
3088
3089         READ_BUF(8);
3090         READ32(res->rflags);
3091         READ32(bmlen);
3092         if (bmlen > 10)
3093                 goto xdr_error;
3094
3095         READ_BUF(bmlen << 2);
3096         p += bmlen;
3097         return decode_delegation(xdr, res);
3098 xdr_error:
3099         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3100         return -EIO;
3101 }
3102
3103 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3104 {
3105         uint32_t *p;
3106         int status;
3107
3108         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3109         if (status)
3110                 return status;
3111         READ_BUF(sizeof(res->stateid.data));
3112         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3113         return 0;
3114 }
3115
3116 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3117 {
3118         uint32_t *p;
3119         int status;
3120
3121         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3122         if (status)
3123                 return status;
3124         READ_BUF(sizeof(res->stateid.data));
3125         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3126         return 0;
3127 }
3128
3129 static int decode_putfh(struct xdr_stream *xdr)
3130 {
3131         return decode_op_hdr(xdr, OP_PUTFH);
3132 }
3133
3134 static int decode_putrootfh(struct xdr_stream *xdr)
3135 {
3136         return decode_op_hdr(xdr, OP_PUTROOTFH);
3137 }
3138
3139 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3140 {
3141         struct kvec *iov = req->rq_rcv_buf.head;
3142         uint32_t *p;
3143         uint32_t count, eof, recvd, hdrlen;
3144         int status;
3145
3146         status = decode_op_hdr(xdr, OP_READ);
3147         if (status)
3148                 return status;
3149         READ_BUF(8);
3150         READ32(eof);
3151         READ32(count);
3152         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3153         recvd = req->rq_rcv_buf.len - hdrlen;
3154         if (count > recvd) {
3155                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3156                                 "count %u > recvd %u\n", count, recvd);
3157                 count = recvd;
3158                 eof = 0;
3159         }
3160         xdr_read_pages(xdr, count);
3161         res->eof = eof;
3162         res->count = count;
3163         return 0;
3164 }
3165
3166 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3167 {
3168         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3169         struct page     *page = *rcvbuf->pages;
3170         struct kvec     *iov = rcvbuf->head;
3171         unsigned int    nr, pglen = rcvbuf->page_len;
3172         uint32_t        *end, *entry, *p, *kaddr;
3173         uint32_t        len, attrlen;
3174         int             hdrlen, recvd, status;
3175
3176         status = decode_op_hdr(xdr, OP_READDIR);
3177         if (status)
3178                 return status;
3179         READ_BUF(8);
3180         COPYMEM(readdir->verifier.data, 8);
3181         dprintk("%s: verifier = 0x%x%x\n",
3182                         __FUNCTION__,
3183                         ((u32 *)readdir->verifier.data)[0],
3184                         ((u32 *)readdir->verifier.data)[1]);
3185
3186
3187         hdrlen = (char *) p - (char *) iov->iov_base;
3188         recvd = rcvbuf->len - hdrlen;
3189         if (pglen > recvd)
3190                 pglen = recvd;
3191         xdr_read_pages(xdr, pglen);
3192
3193         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3194         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3195         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3196         entry = p;
3197         for (nr = 0; *p++; nr++) {
3198                 if (p + 3 > end)
3199                         goto short_pkt;
3200                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3201                 p += 2;                 /* cookie */
3202                 len = ntohl(*p++);      /* filename length */
3203                 if (len > NFS4_MAXNAMLEN) {
3204                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3205                         goto err_unmap;
3206                 }
3207                 dprintk("filename = %*s\n", len, (char *)p);
3208                 p += XDR_QUADLEN(len);
3209                 if (p + 1 > end)
3210                         goto short_pkt;
3211                 len = ntohl(*p++);      /* bitmap length */
3212                 p += len;
3213                 if (p + 1 > end)
3214                         goto short_pkt;
3215                 attrlen = XDR_QUADLEN(ntohl(*p++));
3216                 p += attrlen;           /* attributes */
3217                 if (p + 2 > end)
3218                         goto short_pkt;
3219                 entry = p;
3220         }
3221         if (!nr && (entry[0] != 0 || entry[1] == 0))
3222                 goto short_pkt;
3223 out:
3224         kunmap_atomic(kaddr, KM_USER0);
3225         return 0;
3226 short_pkt:
3227         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3228         entry[0] = entry[1] = 0;
3229         /* truncate listing ? */
3230         if (!nr) {
3231                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3232                 entry[1] = 1;
3233         }
3234         goto out;
3235 err_unmap:
3236         kunmap_atomic(kaddr, KM_USER0);
3237         return -errno_NFSERR_IO;
3238 }
3239
3240 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3241 {
3242         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3243         struct kvec *iov = rcvbuf->head;
3244         int hdrlen, len, recvd;
3245         uint32_t *p;
3246         char *kaddr;
3247         int status;
3248
3249         status = decode_op_hdr(xdr, OP_READLINK);
3250         if (status)
3251                 return status;
3252
3253         /* Convert length of symlink */
3254         READ_BUF(4);
3255         READ32(len);
3256         if (len >= rcvbuf->page_len || len <= 0) {
3257                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3258                 return -ENAMETOOLONG;
3259         }
3260         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3261         recvd = req->rq_rcv_buf.len - hdrlen;
3262         if (recvd < len) {
3263                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3264                                 "count %u > recvd %u\n", len, recvd);
3265                 return -EIO;
3266         }
3267         xdr_read_pages(xdr, len);
3268         /*
3269          * The XDR encode routine has set things up so that
3270          * the link text will be copied directly into the
3271          * buffer.  We just have to do overflow-checking,
3272          * and and null-terminate the text (the VFS expects
3273          * null-termination).
3274          */
3275         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3276         kaddr[len+rcvbuf->page_base] = '\0';
3277         kunmap_atomic(kaddr, KM_USER0);
3278         return 0;
3279 }
3280
3281 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3282 {
3283         int status;
3284
3285         status = decode_op_hdr(xdr, OP_REMOVE);
3286         if (status)
3287                 goto out;
3288         status = decode_change_info(xdr, cinfo);
3289 out:
3290         return status;
3291 }
3292
3293 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3294               struct nfs4_change_info *new_cinfo)
3295 {
3296         int status;
3297
3298         status = decode_op_hdr(xdr, OP_RENAME);
3299         if (status)
3300                 goto out;
3301         if ((status = decode_change_info(xdr, old_cinfo)))
3302                 goto out;
3303         status = decode_change_info(xdr, new_cinfo);
3304 out:
3305         return status;
3306 }
3307
3308 static int decode_renew(struct xdr_stream *xdr)
3309 {
3310         return decode_op_hdr(xdr, OP_RENEW);
3311 }
3312
3313 static int
3314 decode_restorefh(struct xdr_stream *xdr)
3315 {
3316         return decode_op_hdr(xdr, OP_RESTOREFH);
3317 }
3318
3319 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3320                 size_t *acl_len)
3321 {
3322         uint32_t *savep;
3323         uint32_t attrlen,
3324                  bitmap[2] = {0};
3325         struct kvec *iov = req->rq_rcv_buf.head;
3326         int status;
3327
3328         *acl_len = 0;
3329         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3330                 goto out;
3331         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3332                 goto out;
3333         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3334                 goto out;
3335
3336         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3337                 return -EIO;
3338         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3339                 int hdrlen, recvd;
3340
3341                 /* We ignore &savep and don't do consistency checks on
3342                  * the attr length.  Let userspace figure it out.... */
3343                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3344                 recvd = req->rq_rcv_buf.len - hdrlen;
3345                 if (attrlen > recvd) {
3346                         printk(KERN_WARNING "NFS: server cheating in getattr"
3347                                         " acl reply: attrlen %u > recvd %u\n",
3348                                         attrlen, recvd);
3349                         return -EINVAL;
3350                 }
3351                 if (attrlen <= *acl_len)
3352                         xdr_read_pages(xdr, attrlen);
3353                 *acl_len = attrlen;
3354         } else
3355                 status = -EOPNOTSUPP;
3356
3357 out:
3358         return status;
3359 }
3360
3361 static int
3362 decode_savefh(struct xdr_stream *xdr)
3363 {
3364         return decode_op_hdr(xdr, OP_SAVEFH);
3365 }
3366
3367 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3368 {
3369         uint32_t *p;
3370         uint32_t bmlen;
3371         int status;
3372
3373
3374         status = decode_op_hdr(xdr, OP_SETATTR);
3375         if (status)
3376                 return status;
3377         READ_BUF(4);
3378         READ32(bmlen);
3379         READ_BUF(bmlen << 2);
3380         return 0;
3381 }
3382
3383 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3384 {
3385         uint32_t *p;
3386         uint32_t opnum;
3387         int32_t nfserr;
3388
3389         READ_BUF(8);
3390         READ32(opnum);
3391         if (opnum != OP_SETCLIENTID) {
3392                 printk(KERN_NOTICE
3393                                 "nfs4_decode_setclientid: Server returned operation"
3394                                 " %d\n", opnum);
3395                 return -EIO;
3396         }
3397         READ32(nfserr);
3398         if (nfserr == NFS_OK) {
3399                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3400                 READ64(clp->cl_clientid);
3401                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3402         } else if (nfserr == NFSERR_CLID_INUSE) {
3403                 uint32_t len;
3404
3405                 /* skip netid string */
3406                 READ_BUF(4);
3407                 READ32(len);
3408                 READ_BUF(len);
3409
3410                 /* skip uaddr string */
3411                 READ_BUF(4);
3412                 READ32(len);
3413                 READ_BUF(len);
3414                 return -NFSERR_CLID_INUSE;
3415         } else
3416                 return -nfs_stat_to_errno(nfserr);
3417
3418         return 0;
3419 }
3420
3421 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3422 {
3423         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3424 }
3425
3426 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3427 {
3428         uint32_t *p;
3429         int status;
3430
3431         status = decode_op_hdr(xdr, OP_WRITE);
3432         if (status)
3433                 return status;
3434
3435         READ_BUF(16);
3436         READ32(res->count);
3437         READ32(res->verf->committed);
3438         COPYMEM(res->verf->verifier, 8);
3439         return 0;
3440 }
3441
3442 static int decode_delegreturn(struct xdr_stream *xdr)
3443 {
3444         return decode_op_hdr(xdr, OP_DELEGRETURN);
3445 }
3446
3447 /*
3448  * Decode OPEN_DOWNGRADE response
3449  */
3450 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3451 {
3452         struct xdr_stream xdr;
3453         struct compound_hdr hdr;
3454         int status;
3455
3456         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3457         status = decode_compound_hdr(&xdr, &hdr);
3458         if (status)
3459                 goto out;
3460         status = decode_putfh(&xdr);
3461         if (status)
3462                 goto out;
3463         status = decode_open_downgrade(&xdr, res);
3464         if (status != 0)
3465                 goto out;
3466         decode_getfattr(&xdr, res->fattr, res->server);
3467 out:
3468         return status;
3469 }
3470
3471 /*
3472  * END OF "GENERIC" DECODE ROUTINES.
3473  */
3474
3475 /*
3476  * Decode ACCESS response
3477  */
3478 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3479 {
3480         struct xdr_stream xdr;
3481         struct compound_hdr hdr;
3482         int status;
3483
3484         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3485         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3486                 goto out;
3487         if ((status = decode_putfh(&xdr)) == 0)
3488                 status = decode_access(&xdr, res);
3489 out:
3490         return status;
3491 }
3492
3493 /*
3494  * Decode LOOKUP response
3495  */
3496 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3497 {
3498         struct xdr_stream xdr;
3499         struct compound_hdr hdr;
3500         int status;
3501
3502         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3503         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3504                 goto out;
3505         if ((status = decode_putfh(&xdr)) != 0)
3506                 goto out;
3507         if ((status = decode_lookup(&xdr)) != 0)
3508                 goto out;
3509         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3510                 goto out;
3511         status = decode_getfattr(&xdr, res->fattr, res->server);
3512 out:
3513         return status;
3514 }
3515
3516 /*
3517  * Decode LOOKUP_ROOT response
3518  */
3519 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3520 {
3521         struct xdr_stream xdr;
3522         struct compound_hdr hdr;
3523         int status;
3524
3525         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3526         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3527                 goto out;
3528         if ((status = decode_putrootfh(&xdr)) != 0)
3529                 goto out;
3530         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3531                 status = decode_getfattr(&xdr, res->fattr, res->server);
3532 out:
3533         return status;
3534 }
3535
3536 /*
3537  * Decode REMOVE response
3538  */
3539 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3540 {
3541         struct xdr_stream xdr;
3542         struct compound_hdr hdr;
3543         int status;
3544
3545         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3546         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3547                 goto out;
3548         if ((status = decode_putfh(&xdr)) != 0)
3549                 goto out;
3550         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3551                 goto out;
3552         decode_getfattr(&xdr, res->dir_attr, res->server);
3553 out:
3554         return status;
3555 }
3556
3557 /*
3558  * Decode RENAME response
3559  */
3560 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3561 {
3562         struct xdr_stream xdr;
3563         struct compound_hdr hdr;
3564         int status;
3565
3566         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3567         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3568                 goto out;
3569         if ((status = decode_putfh(&xdr)) != 0)
3570                 goto out;
3571         if ((status = decode_savefh(&xdr)) != 0)
3572                 goto out;
3573         if ((status = decode_putfh(&xdr)) != 0)
3574                 goto out;
3575         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3576                 goto out;
3577         /* Current FH is target directory */
3578         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3579                 goto out;
3580         if ((status = decode_restorefh(&xdr)) != 0)
3581                 goto out;
3582         decode_getfattr(&xdr, res->old_fattr, res->server);
3583 out:
3584         return status;
3585 }
3586
3587 /*
3588  * Decode LINK response
3589  */
3590 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3591 {
3592         struct xdr_stream xdr;
3593         struct compound_hdr hdr;
3594         int status;
3595
3596         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3597         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3598                 goto out;
3599         if ((status = decode_putfh(&xdr)) != 0)
3600                 goto out;
3601         if ((status = decode_savefh(&xdr)) != 0)
3602                 goto out;
3603         if ((status = decode_putfh(&xdr)) != 0)
3604                 goto out;
3605         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3606                 goto out;
3607         /*
3608          * Note order: OP_LINK leaves the directory as the current
3609          *             filehandle.
3610          */
3611         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3612                 goto out;
3613         if ((status = decode_restorefh(&xdr)) != 0)
3614                 goto out;
3615         decode_getfattr(&xdr, res->fattr, res->server);
3616 out:
3617         return status;
3618 }
3619
3620 /*
3621  * Decode CREATE response
3622  */
3623 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3624 {
3625         struct xdr_stream xdr;
3626         struct compound_hdr hdr;
3627         int status;
3628
3629         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3630         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3631                 goto out;
3632         if ((status = decode_putfh(&xdr)) != 0)
3633                 goto out;
3634         if ((status = decode_savefh(&xdr)) != 0)
3635                 goto out;
3636         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3637                 goto out;
3638         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3639                 goto out;
3640         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3641                 goto out;
3642         if ((status = decode_restorefh(&xdr)) != 0)
3643                 goto out;
3644         decode_getfattr(&xdr, res->dir_fattr, res->server);
3645 out:
3646         return status;
3647 }
3648
3649 /*
3650  * Decode SYMLINK response
3651  */
3652 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3653 {
3654         return nfs4_xdr_dec_create(rqstp, p, res);
3655 }
3656
3657 /*
3658  * Decode GETATTR response
3659  */
3660 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3661 {
3662         struct xdr_stream xdr;
3663         struct compound_hdr hdr;
3664         int status;
3665
3666         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3667         status = decode_compound_hdr(&xdr, &hdr);
3668         if (status)
3669                 goto out;
3670         status = decode_putfh(&xdr);
3671         if (status)
3672                 goto out;
3673         status = decode_getfattr(&xdr, res->fattr, res->server);
3674 out:
3675         return status;
3676
3677 }
3678
3679 /*
3680  * Encode an SETACL request
3681  */
3682 static int
3683 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3684 {
3685         struct xdr_stream xdr;
3686         struct compound_hdr hdr = {
3687                 .nops   = 2,
3688         };
3689         int status;
3690
3691         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3692         encode_compound_hdr(&xdr, &hdr);
3693         status = encode_putfh(&xdr, args->fh);
3694         if (status)
3695                 goto out;
3696         status = encode_setacl(&xdr, args);
3697 out:
3698         return status;
3699 }
3700 /*
3701  * Decode SETACL response
3702  */
3703 static int
3704 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3705 {
3706         struct xdr_stream xdr;
3707         struct compound_hdr hdr;
3708         int status;
3709
3710         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3711         status = decode_compound_hdr(&xdr, &hdr);
3712         if (status)
3713                 goto out;
3714         status = decode_putfh(&xdr);
3715         if (status)
3716                 goto out;
3717         status = decode_setattr(&xdr, res);
3718 out:
3719         return status;
3720 }
3721
3722 /*
3723  * Decode GETACL response
3724  */
3725 static int
3726 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3727 {
3728         struct xdr_stream xdr;
3729         struct compound_hdr hdr;
3730         int status;
3731
3732         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3733         status = decode_compound_hdr(&xdr, &hdr);
3734         if (status)
3735                 goto out;
3736         status = decode_putfh(&xdr);
3737         if (status)
3738                 goto out;
3739         status = decode_getacl(&xdr, rqstp, acl_len);
3740
3741 out:
3742         return status;
3743 }
3744
3745 /*
3746  * Decode CLOSE response
3747  */
3748 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3749 {
3750         struct xdr_stream xdr;
3751         struct compound_hdr hdr;
3752         int status;
3753
3754         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3755         status = decode_compound_hdr(&xdr, &hdr);
3756         if (status)
3757                 goto out;
3758         status = decode_putfh(&xdr);
3759         if (status)
3760                 goto out;
3761         status = decode_close(&xdr, res);
3762         if (status != 0)
3763                 goto out;
3764         /*
3765          * Note: Server may do delete on close for this file
3766          *      in which case the getattr call will fail with
3767          *      an ESTALE error. Shouldn't be a problem,
3768          *      though, since fattr->valid will remain unset.
3769          */
3770         decode_getfattr(&xdr, res->fattr, res->server);
3771 out:
3772         return status;
3773 }
3774
3775 /*
3776  * Decode OPEN response
3777  */
3778 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3779 {
3780         struct xdr_stream xdr;
3781         struct compound_hdr hdr;
3782         int status;
3783
3784         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3785         status = decode_compound_hdr(&xdr, &hdr);
3786         if (status)
3787                 goto out;
3788         status = decode_putfh(&xdr);
3789         if (status)
3790                 goto out;
3791         status = decode_savefh(&xdr);
3792         if (status)
3793                 goto out;
3794         status = decode_open(&xdr, res);
3795         if (status)
3796                 goto out;
3797         status = decode_getfh(&xdr, &res->fh);
3798         if (status)
3799                 goto out;
3800         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3801                 goto out;
3802         if ((status = decode_restorefh(&xdr)) != 0)
3803                 goto out;
3804         decode_getfattr(&xdr, res->dir_attr, res->server);
3805 out:
3806         return status;
3807 }
3808
3809 /*
3810  * Decode OPEN_CONFIRM response
3811  */
3812 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3813 {
3814         struct xdr_stream xdr;
3815         struct compound_hdr hdr;
3816         int status;
3817
3818         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3819         status = decode_compound_hdr(&xdr, &hdr);
3820         if (status)
3821                 goto out;
3822         status = decode_putfh(&xdr);
3823         if (status)
3824                 goto out;
3825         status = decode_open_confirm(&xdr, res);
3826 out:
3827         return status;
3828 }
3829
3830 /*
3831  * Decode OPEN response
3832  */
3833 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3834 {
3835         struct xdr_stream xdr;
3836         struct compound_hdr hdr;
3837         int status;
3838
3839         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3840         status = decode_compound_hdr(&xdr, &hdr);
3841         if (status)
3842                 goto out;
3843         status = decode_putfh(&xdr);
3844         if (status)
3845                 goto out;
3846         status = decode_open(&xdr, res);
3847         if (status)
3848                 goto out;
3849         decode_getfattr(&xdr, res->f_attr, res->server);
3850 out:
3851         return status;
3852 }
3853
3854 /*
3855  * Decode SETATTR response
3856  */
3857 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3858 {
3859         struct xdr_stream xdr;
3860         struct compound_hdr hdr;
3861         int status;
3862
3863         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3864         status = decode_compound_hdr(&xdr, &hdr);
3865         if (status)
3866                 goto out;
3867         status = decode_putfh(&xdr);
3868         if (status)
3869                 goto out;
3870         status = decode_setattr(&xdr, res);
3871         if (status)
3872                 goto out;
3873         status = decode_getfattr(&xdr, res->fattr, res->server);
3874         if (status == NFS4ERR_DELAY)
3875                 status = 0;
3876 out:
3877         return status;
3878 }
3879
3880 /*
3881  * Decode LOCK response
3882  */
3883 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lock_res *res)
3884 {
3885         struct xdr_stream xdr;
3886         struct compound_hdr hdr;
3887         int status;
3888
3889         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3890         status = decode_compound_hdr(&xdr, &hdr);
3891         if (status)
3892                 goto out;
3893         status = decode_putfh(&xdr);
3894         if (status)
3895                 goto out;
3896         status = decode_lock(&xdr, res);
3897 out:
3898         return status;
3899 }
3900
3901 /*
3902  * Decode LOCKT response
3903  */
3904 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockt_res *res)
3905 {
3906         struct xdr_stream xdr;
3907         struct compound_hdr hdr;
3908         int status;
3909
3910         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3911         status = decode_compound_hdr(&xdr, &hdr);
3912         if (status)
3913                 goto out;
3914         status = decode_putfh(&xdr);
3915         if (status)
3916                 goto out;
3917         status = decode_lockt(&xdr, res);
3918 out:
3919         return status;
3920 }
3921
3922 /*
3923  * Decode LOCKU response
3924  */
3925 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_locku_res *res)
3926 {
3927         struct xdr_stream xdr;
3928         struct compound_hdr hdr;
3929         int status;
3930
3931         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3932         status = decode_compound_hdr(&xdr, &hdr);
3933         if (status)
3934                 goto out;
3935         status = decode_putfh(&xdr);
3936         if (status)
3937                 goto out;
3938         status = decode_locku(&xdr, res);
3939 out:
3940         return status;
3941 }
3942
3943 /*
3944  * Decode READLINK response
3945  */
3946 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3947 {
3948         struct xdr_stream xdr;
3949         struct compound_hdr hdr;
3950         int status;
3951
3952         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3953         status = decode_compound_hdr(&xdr, &hdr);
3954         if (status)
3955                 goto out;
3956         status = decode_putfh(&xdr);
3957         if (status)
3958                 goto out;
3959         status = decode_readlink(&xdr, rqstp);
3960 out:
3961         return status;
3962 }
3963
3964 /*
3965  * Decode READDIR response
3966  */
3967 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3968 {
3969         struct xdr_stream xdr;
3970         struct compound_hdr hdr;
3971         int status;
3972
3973         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3974         status = decode_compound_hdr(&xdr, &hdr);
3975         if (status)
3976                 goto out;
3977         status = decode_putfh(&xdr);
3978         if (status)
3979                 goto out;
3980         status = decode_readdir(&xdr, rqstp, res);
3981 out:
3982         return status;
3983 }
3984
3985 /*
3986  * Decode Read response
3987  */
3988 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3989 {
3990         struct xdr_stream xdr;
3991         struct compound_hdr hdr;
3992         int status;
3993
3994         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3995         status = decode_compound_hdr(&xdr, &hdr);
3996         if (status)
3997                 goto out;
3998         status = decode_putfh(&xdr);
3999         if (status)
4000                 goto out;
4001         status = decode_read(&xdr, rqstp, res);
4002         if (!status)
4003                 status = res->count;
4004 out:
4005         return status;
4006 }
4007
4008 /*
4009  * Decode WRITE response
4010  */
4011 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4012 {
4013         struct xdr_stream xdr;
4014         struct compound_hdr hdr;
4015         int status;
4016
4017         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4018         status = decode_compound_hdr(&xdr, &hdr);
4019         if (status)
4020                 goto out;
4021         status = decode_putfh(&xdr);
4022         if (status)
4023                 goto out;
4024         status = decode_write(&xdr, res);
4025         if (status)
4026                 goto out;
4027         decode_getfattr(&xdr, res->fattr, res->server);
4028         if (!status)
4029                 status = res->count;
4030 out:
4031         return status;
4032 }
4033
4034 /*
4035  * Decode COMMIT response
4036  */
4037 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4038 {
4039         struct xdr_stream xdr;
4040         struct compound_hdr hdr;
4041         int status;
4042
4043         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4044         status = decode_compound_hdr(&xdr, &hdr);
4045         if (status)
4046                 goto out;
4047         status = decode_putfh(&xdr);
4048         if (status)
4049                 goto out;
4050         status = decode_commit(&xdr, res);
4051         if (status)
4052                 goto out;
4053         decode_getfattr(&xdr, res->fattr, res->server);
4054 out:
4055         return status;
4056 }
4057
4058 /*
4059  * FSINFO request
4060  */
4061 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4062 {
4063         struct xdr_stream xdr;
4064         struct compound_hdr hdr;
4065         int status;
4066
4067         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4068         status = decode_compound_hdr(&xdr, &hdr);
4069         if (!status)
4070                 status = decode_putfh(&xdr);
4071         if (!status)
4072                 status = decode_fsinfo(&xdr, fsinfo);
4073         if (!status)
4074                 status = -nfs_stat_to_errno(hdr.status);
4075         return status;
4076 }
4077
4078 /*
4079  * PATHCONF request
4080  */
4081 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4082 {
4083         struct xdr_stream xdr;
4084         struct compound_hdr hdr;
4085         int status;
4086
4087         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4088         status = decode_compound_hdr(&xdr, &hdr);
4089         if (!status)
4090                 status = decode_putfh(&xdr);
4091         if (!status)
4092                 status = decode_pathconf(&xdr, pathconf);
4093         return status;
4094 }
4095
4096 /*
4097  * STATFS request
4098  */
4099 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4100 {
4101         struct xdr_stream xdr;
4102         struct compound_hdr hdr;
4103         int status;
4104
4105         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4106         status = decode_compound_hdr(&xdr, &hdr);
4107         if (!status)
4108                 status = decode_putfh(&xdr);
4109         if (!status)
4110                 status = decode_statfs(&xdr, fsstat);
4111         return status;
4112 }
4113
4114 /*
4115  * GETATTR_BITMAP request
4116  */
4117 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4118 {
4119         struct xdr_stream xdr;
4120         struct compound_hdr hdr;
4121         int status;
4122
4123         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4124         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4125                 goto out;
4126         if ((status = decode_putfh(&xdr)) != 0)
4127                 goto out;
4128         status = decode_server_caps(&xdr, res);
4129 out:
4130         return status;
4131 }
4132
4133 /*
4134  * Decode RENEW response
4135  */
4136 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4137 {
4138         struct xdr_stream xdr;
4139         struct compound_hdr hdr;
4140         int status;
4141
4142         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4143         status = decode_compound_hdr(&xdr, &hdr);
4144         if (!status)
4145                 status = decode_renew(&xdr);
4146         return status;
4147 }
4148
4149 /*
4150  * a SETCLIENTID request
4151  */
4152 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4153                 struct nfs4_client *clp)
4154 {
4155         struct xdr_stream xdr;
4156         struct compound_hdr hdr;
4157         int status;
4158
4159         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4160         status = decode_compound_hdr(&xdr, &hdr);
4161         if (!status)
4162                 status = decode_setclientid(&xdr, clp);
4163         if (!status)
4164                 status = -nfs_stat_to_errno(hdr.status);
4165         return status;
4166 }
4167
4168 /*
4169  * a SETCLIENTID_CONFIRM request
4170  */
4171 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4172 {
4173         struct xdr_stream xdr;
4174         struct compound_hdr hdr;
4175         int status;
4176
4177         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4178         status = decode_compound_hdr(&xdr, &hdr);
4179         if (!status)
4180                 status = decode_setclientid_confirm(&xdr);
4181         if (!status)
4182                 status = decode_putrootfh(&xdr);
4183         if (!status)
4184                 status = decode_fsinfo(&xdr, fsinfo);
4185         if (!status)
4186                 status = -nfs_stat_to_errno(hdr.status);
4187         return status;
4188 }
4189
4190 /*
4191  * DELEGRETURN request
4192  */
4193 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4194 {
4195         struct xdr_stream xdr;
4196         struct compound_hdr hdr;
4197         int status;
4198
4199         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4200         status = decode_compound_hdr(&xdr, &hdr);
4201         if (status == 0) {
4202                 status = decode_putfh(&xdr);
4203                 if (status == 0)
4204                         status = decode_delegreturn(&xdr);
4205         }
4206         return status;
4207 }
4208
4209 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4210 {
4211         uint32_t bitmap[2] = {0};
4212         uint32_t len;
4213
4214         if (!*p++) {
4215                 if (!*p)
4216                         return ERR_PTR(-EAGAIN);
4217                 entry->eof = 1;
4218                 return ERR_PTR(-EBADCOOKIE);
4219         }
4220
4221         entry->prev_cookie = entry->cookie;
4222         p = xdr_decode_hyper(p, &entry->cookie);
4223         entry->len = ntohl(*p++);
4224         entry->name = (const char *) p;
4225         p += XDR_QUADLEN(entry->len);
4226
4227         /*
4228          * In case the server doesn't return an inode number,
4229          * we fake one here.  (We don't use inode number 0,
4230          * since glibc seems to choke on it...)
4231          */
4232         entry->ino = 1;
4233
4234         len = ntohl(*p++);              /* bitmap length */
4235         if (len-- > 0) {
4236                 bitmap[0] = ntohl(*p++);
4237                 if (len-- > 0) {
4238                         bitmap[1] = ntohl(*p++);
4239                         p += len;
4240                 }
4241         }
4242         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4243         if (len > 0) {
4244                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4245                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4246                         /* Ignore the return value of rdattr_error for now */
4247                         p++;
4248                         len--;
4249                 }
4250                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4251                         xdr_decode_hyper(p, &entry->ino);
4252                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4253                         xdr_decode_hyper(p, &entry->ino);
4254                 p += len;
4255         }
4256
4257         entry->eof = !p[0] && p[1];
4258         return p;
4259 }
4260
4261 /*
4262  * We need to translate between nfs status return values and
4263  * the local errno values which may not be the same.
4264  */
4265 static struct {
4266         int stat;
4267         int errno;
4268 } nfs_errtbl[] = {
4269         { NFS4_OK,              0               },
4270         { NFS4ERR_PERM,         EPERM           },
4271         { NFS4ERR_NOENT,        ENOENT          },
4272         { NFS4ERR_IO,           errno_NFSERR_IO },
4273         { NFS4ERR_NXIO,         ENXIO           },
4274         { NFS4ERR_ACCESS,       EACCES          },
4275         { NFS4ERR_EXIST,        EEXIST          },
4276         { NFS4ERR_XDEV,         EXDEV           },
4277         { NFS4ERR_NOTDIR,       ENOTDIR         },
4278         { NFS4ERR_ISDIR,        EISDIR          },
4279         { NFS4ERR_INVAL,        EINVAL          },
4280         { NFS4ERR_FBIG,         EFBIG           },
4281         { NFS4ERR_NOSPC,        ENOSPC          },
4282         { NFS4ERR_ROFS,         EROFS           },
4283         { NFS4ERR_MLINK,        EMLINK          },
4284         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4285         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4286         { NFS4ERR_DQUOT,        EDQUOT          },
4287         { NFS4ERR_STALE,        ESTALE          },
4288         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4289         { NFS4ERR_BADOWNER,     EINVAL          },
4290         { NFS4ERR_BADNAME,      EINVAL          },
4291         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4292         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4293         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4294         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4295         { NFS4ERR_BADTYPE,      EBADTYPE        },
4296         { NFS4ERR_LOCKED,       EAGAIN          },
4297         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4298         { NFS4ERR_SYMLINK,      ELOOP           },
4299         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4300         { NFS4ERR_DEADLOCK,     EDEADLK         },
4301         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4302                                                     * to be handled by a
4303                                                     * middle-layer.
4304                                                     */
4305         { -1,                   EIO             }
4306 };
4307
4308 /*
4309  * Convert an NFS error code to a local one.
4310  * This one is used jointly by NFSv2 and NFSv3.
4311  */
4312 static int
4313 nfs_stat_to_errno(int stat)
4314 {
4315         int i;
4316         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4317                 if (nfs_errtbl[i].stat == stat)
4318                         return nfs_errtbl[i].errno;
4319         }
4320         if (stat <= 10000 || stat > 10100) {
4321                 /* The server is looney tunes. */
4322                 return ESERVERFAULT;
4323         }
4324         /* If we cannot translate the error, the recovery routines should
4325          * handle it.
4326          * Note: remaining NFSv4 error codes have values > 10000, so should
4327          * not conflict with native Linux error codes.
4328          */
4329         return stat;
4330 }
4331
4332 #ifndef MAX
4333 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4334 #endif
4335
4336 #define PROC(proc, argtype, restype)                            \
4337 [NFSPROC4_CLNT_##proc] = {                                      \
4338         .p_proc   = NFSPROC4_COMPOUND,                          \
4339         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4340         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4341         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4342     }
4343
4344 struct rpc_procinfo     nfs4_procedures[] = {
4345   PROC(READ,            enc_read,       dec_read),
4346   PROC(WRITE,           enc_write,      dec_write),
4347   PROC(COMMIT,          enc_commit,     dec_commit),
4348   PROC(OPEN,            enc_open,       dec_open),
4349   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4350   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4351   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4352   PROC(CLOSE,           enc_close,      dec_close),
4353   PROC(SETATTR,         enc_setattr,    dec_setattr),
4354   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4355   PROC(RENEW,           enc_renew,      dec_renew),
4356   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4357   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4358   PROC(LOCK,            enc_lock,       dec_lock),
4359   PROC(LOCKT,           enc_lockt,      dec_lockt),
4360   PROC(LOCKU,           enc_locku,      dec_locku),
4361   PROC(ACCESS,          enc_access,     dec_access),
4362   PROC(GETATTR,         enc_getattr,    dec_getattr),
4363   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4364   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4365   PROC(REMOVE,          enc_remove,     dec_remove),
4366   PROC(RENAME,          enc_rename,     dec_rename),
4367   PROC(LINK,            enc_link,       dec_link),
4368   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4369   PROC(CREATE,          enc_create,     dec_create),
4370   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4371   PROC(STATFS,          enc_statfs,     dec_statfs),
4372   PROC(READLINK,        enc_readlink,   dec_readlink),
4373   PROC(READDIR,         enc_readdir,    dec_readdir),
4374   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4375   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4376   PROC(GETACL,          enc_getacl,     dec_getacl),
4377   PROC(SETACL,          enc_setacl,     dec_setacl),
4378 };
4379
4380 struct rpc_version              nfs_version4 = {
4381         .number                 = 4,
4382         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4383         .procs                  = nfs4_procedures
4384 };
4385
4386 /*
4387  * Local variables:
4388  *  c-basic-offset: 8
4389  * End:
4390  */