fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define owner_id_maxsz          (1 + 1)
  74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define op_encode_hdr_maxsz     (1)
  77 #define op_decode_hdr_maxsz     (2)
  78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  79                                 (NFS4_FHSIZE >> 2))
  80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  85                                 ((3+NFS4_FHSIZE) >> 2))
  86 #define nfs4_fattr_bitmap_maxsz 3
  87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  90 /* This is based on getfattr, which uses the most attributes: */
  91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
  93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  94                                 nfs4_fattr_value_maxsz)
  95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
  97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
  98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
  99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 104 #define encode_setclientid_maxsz \
 105                                 (op_encode_hdr_maxsz + \
 106                                 4 /*server->ip_addr*/ + \
 107                                 1 /*Netid*/ + \
 108                                 6 /*uaddr*/ + \
 109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 110 #define decode_setclientid_maxsz \
 111                                 (op_decode_hdr_maxsz + \
 112                                 2 + \
 113                                 1024) /* large value for CLID_INUSE */
 114 #define encode_setclientid_confirm_maxsz \
 115                                 (op_encode_hdr_maxsz + \
 116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 117 #define decode_setclientid_confirm_maxsz \
 118                                 (op_decode_hdr_maxsz)
 119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 122                                 nfs4_name_maxsz)
 123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 124                                 2 * nfs4_name_maxsz)
 125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 127                                 nfs4_name_maxsz)
 128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 130                                 1 + nfs4_name_maxsz + \
 131                                 nfs4_path_maxsz + \
 132                                 nfs4_fattr_maxsz)
 133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 135                                 2 + nfs4_name_maxsz + \
 136                                 nfs4_fattr_maxsz)
 137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 143                                 encode_putfh_maxsz + \
 144                                 op_encode_hdr_maxsz + 7)
 145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 146                                 decode_putfh_maxsz + \
 147                                 op_decode_hdr_maxsz + 2)
 148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 149                                 encode_putfh_maxsz + \
 150                                 op_encode_hdr_maxsz)
 151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 152                                 decode_putfh_maxsz + \
 153                                 op_decode_hdr_maxsz)
 154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 155                                 encode_putfh_maxsz + \
 156                                 op_encode_hdr_maxsz + 9)
 157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 158                                 decode_putfh_maxsz + \
 159                                 op_decode_hdr_maxsz + 2)
 160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 161                                 encode_putfh_maxsz + \
 162                                 op_encode_hdr_maxsz + 8 + \
 163                                 encode_getattr_maxsz)
 164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 165                                 decode_putfh_maxsz + \
 166                                 op_decode_hdr_maxsz + 4 + \
 167                                 decode_getattr_maxsz)
 168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 169                                 encode_putfh_maxsz + \
 170                                 op_encode_hdr_maxsz + 3 + \
 171                                 encode_getattr_maxsz)
 172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 173                                 decode_putfh_maxsz + \
 174                                 op_decode_hdr_maxsz + 2 + \
 175                                 decode_getattr_maxsz)
 176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 177                                 encode_putfh_maxsz + \
 178                                 op_encode_hdr_maxsz + \
 179                                 13 + 3 + 2 + 64 + \
 180                                 encode_getattr_maxsz + \
 181                                 encode_getfh_maxsz)
 182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 183                                 decode_putfh_maxsz + \
 184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 185                                 decode_getattr_maxsz + \
 186                                 decode_getfh_maxsz)
 187 #define NFS4_enc_open_confirm_sz      \
 188                                 (compound_encode_hdr_maxsz + \
 189                                 encode_putfh_maxsz + \
 190                                 op_encode_hdr_maxsz + 5)
 191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 192                                         decode_putfh_maxsz + \
 193                                         op_decode_hdr_maxsz + 4)
 194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 195                                         encode_putfh_maxsz + \
 196                                         op_encode_hdr_maxsz + \
 197                                         11)
 198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 199                                         decode_putfh_maxsz + \
 200                                         op_decode_hdr_maxsz + \
 201                                         4 + 5 + 2 + 3)
 202 #define NFS4_enc_open_downgrade_sz \
 203                                 (compound_encode_hdr_maxsz + \
 204                                 encode_putfh_maxsz + \
 205                                 op_encode_hdr_maxsz + 7 + \
 206                                 encode_getattr_maxsz)
 207 #define NFS4_dec_open_downgrade_sz \
 208                                 (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 op_decode_hdr_maxsz + 4 + \
 211                                 decode_getattr_maxsz)
 212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 213                                 encode_putfh_maxsz + \
 214                                 op_encode_hdr_maxsz + 5 + \
 215                                 encode_getattr_maxsz)
 216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 217                                 decode_putfh_maxsz + \
 218                                 op_decode_hdr_maxsz + 4 + \
 219                                 decode_getattr_maxsz)
 220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 221                                 encode_putfh_maxsz + \
 222                                 op_encode_hdr_maxsz + 4 + \
 223                                 nfs4_fattr_maxsz + \
 224                                 encode_getattr_maxsz)
 225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 226                                 decode_putfh_maxsz + \
 227                                 op_decode_hdr_maxsz + 3)
 228 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 229                                 encode_putfh_maxsz + \
 230                                 encode_fsinfo_maxsz)
 231 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 232                                 decode_putfh_maxsz + \
 233                                 decode_fsinfo_maxsz)
 234 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 235                                 encode_renew_maxsz)
 236 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 237                                 decode_renew_maxsz)
 238 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 239                                 encode_setclientid_maxsz)
 240 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 241                                 decode_setclientid_maxsz)
 242 #define NFS4_enc_setclientid_confirm_sz \
 243                                 (compound_encode_hdr_maxsz + \
 244                                 encode_setclientid_confirm_maxsz + \
 245                                 encode_putrootfh_maxsz + \
 246                                 encode_fsinfo_maxsz)
 247 #define NFS4_dec_setclientid_confirm_sz \
 248                                 (compound_decode_hdr_maxsz + \
 249                                 decode_setclientid_confirm_maxsz + \
 250                                 decode_putrootfh_maxsz + \
 251                                 decode_fsinfo_maxsz)
 252 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 253                                 encode_putfh_maxsz + \
 254                                 encode_getattr_maxsz + \
 255                                 op_encode_hdr_maxsz + \
 256                                 1 + 1 + 2 + 2 + \
 257                                 1 + 4 + 1 + 2 + \
 258                                 owner_id_maxsz)
 259 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 260                                 decode_putfh_maxsz + \
 261                                 decode_getattr_maxsz + \
 262                                 op_decode_hdr_maxsz + \
 263                                 2 + 2 + 1 + 2 + \
 264                                 owner_id_maxsz)
 265 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 266                                 encode_putfh_maxsz + \
 267                                 encode_getattr_maxsz + \
 268                                 op_encode_hdr_maxsz + \
 269                                 1 + 2 + 2 + 2 + \
 270                                 owner_id_maxsz)
 271 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 272 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 273                                 encode_putfh_maxsz + \
 274                                 encode_getattr_maxsz + \
 275                                 op_encode_hdr_maxsz + \
 276                                 1 + 1 + 4 + 2 + 2)
 277 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 278                                 decode_putfh_maxsz + \
 279                                 decode_getattr_maxsz + \
 280                                 op_decode_hdr_maxsz + 4)
 281 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 282                                 encode_putfh_maxsz + \
 283                                 op_encode_hdr_maxsz + 1)
 284 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 op_decode_hdr_maxsz + 2)
 287 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 288                                 encode_putfh_maxsz + \
 289                                 encode_getattr_maxsz)
 290 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 291                                 decode_putfh_maxsz + \
 292                                 decode_getattr_maxsz)
 293 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 294                                 encode_putfh_maxsz + \
 295                                 encode_lookup_maxsz + \
 296                                 encode_getattr_maxsz + \
 297                                 encode_getfh_maxsz)
 298 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 299                                 decode_putfh_maxsz + \
 300                                 op_decode_hdr_maxsz + \
 301                                 decode_getattr_maxsz + \
 302                                 decode_getfh_maxsz)
 303 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 304                                 encode_putrootfh_maxsz + \
 305                                 encode_getattr_maxsz + \
 306                                 encode_getfh_maxsz)
 307 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 308                                 decode_putrootfh_maxsz + \
 309                                 decode_getattr_maxsz + \
 310                                 decode_getfh_maxsz)
 311 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_remove_maxsz + \
 314                                 encode_getattr_maxsz)
 315 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 op_decode_hdr_maxsz + 5 + \
 318                                 decode_getattr_maxsz)
 319 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_savefh_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_rename_maxsz + \
 324                                 encode_getattr_maxsz + \
 325                                 encode_restorefh_maxsz + \
 326                                 encode_getattr_maxsz)
 327 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 328                                 decode_putfh_maxsz + \
 329                                 decode_savefh_maxsz + \
 330                                 decode_putfh_maxsz + \
 331                                 decode_rename_maxsz + \
 332                                 decode_getattr_maxsz + \
 333                                 decode_restorefh_maxsz + \
 334                                 decode_getattr_maxsz)
 335 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_savefh_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_link_maxsz + \
 340                                 decode_getattr_maxsz + \
 341                                 encode_restorefh_maxsz + \
 342                                 decode_getattr_maxsz)
 343 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 344                                 decode_putfh_maxsz + \
 345                                 decode_savefh_maxsz + \
 346                                 decode_putfh_maxsz + \
 347                                 decode_link_maxsz + \
 348                                 decode_getattr_maxsz + \
 349                                 decode_restorefh_maxsz + \
 350                                 decode_getattr_maxsz)
 351 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_symlink_maxsz + \
 354                                 encode_getattr_maxsz + \
 355                                 encode_getfh_maxsz)
 356 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 357                                 decode_putfh_maxsz + \
 358                                 decode_symlink_maxsz + \
 359                                 decode_getattr_maxsz + \
 360                                 decode_getfh_maxsz)
 361 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_savefh_maxsz + \
 364                                 encode_create_maxsz + \
 365                                 encode_getfh_maxsz + \
 366                                 encode_getattr_maxsz + \
 367                                 encode_restorefh_maxsz + \
 368                                 encode_getattr_maxsz)
 369 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 370                                 decode_putfh_maxsz + \
 371                                 decode_savefh_maxsz + \
 372                                 decode_create_maxsz + \
 373                                 decode_getfh_maxsz + \
 374                                 decode_getattr_maxsz + \
 375                                 decode_restorefh_maxsz + \
 376                                 decode_getattr_maxsz)
 377 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_getattr_maxsz)
 380 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_getattr_maxsz)
 383 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_getattr_maxsz)
 386 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 op_decode_hdr_maxsz + 12)
 389 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 390                                 encode_getattr_maxsz)
 391 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_delegreturn_maxsz)
 396 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 397                                 decode_delegreturn_maxsz)
 398 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 399                                 encode_putfh_maxsz + \
 400                                 encode_getattr_maxsz)
 401 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 402                                 decode_putfh_maxsz + \
 403                                 op_decode_hdr_maxsz + \
 404                                 nfs4_fattr_bitmap_maxsz + 1)
 405 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 406                                 encode_putfh_maxsz + \
 407                                 op_encode_hdr_maxsz + 4 + \
 408                                 nfs4_fattr_bitmap_maxsz + 1)
 409 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 410                                 decode_putfh_maxsz + \
 411                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 412
 413 static struct {
 414         unsigned int    mode;
 415         unsigned int    nfs2type;
 416 } nfs_type2fmt[] = {
 417         { 0,            NFNON        },
 418         { S_IFREG,      NFREG        },
 419         { S_IFDIR,      NFDIR        },
 420         { S_IFBLK,      NFBLK        },
 421         { S_IFCHR,      NFCHR        },
 422         { S_IFLNK,      NFLNK        },
 423         { S_IFSOCK,     NFSOCK       },
 424         { S_IFIFO,      NFFIFO       },
 425         { 0,            NFNON        },
 426         { 0,            NFNON        },
 427 };
 428
 429 struct compound_hdr {
 430         int32_t         status;
 431         uint32_t        nops;
 432         uint32_t        taglen;
 433         char *          tag;
 434 };
 435
 436 /*
 437  * START OF "GENERIC" ENCODE ROUTINES.
 438  *   These may look a little ugly since they are imported from a "generic"
 439  * set of XDR encode/decode routines which are intended to be shared by
 440  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 441  *
 442  * If the pain of reading these is too great, it should be a straightforward
 443  * task to translate them into Linux-specific versions which are more
 444  * consistent with the style used in NFSv2/v3...
 445  */
 446 #define WRITE32(n)               *p++ = htonl(n)
 447 #define WRITE64(n)               do {                           \
 448         *p++ = htonl((uint32_t)((n) >> 32));                            \
 449         *p++ = htonl((uint32_t)(n));                                    \
 450 } while (0)
 451 #define WRITEMEM(ptr,nbytes)     do {                           \
 452         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 453 } while (0)
 454
 455 #define RESERVE_SPACE(nbytes)   do {                            \
 456         p = xdr_reserve_space(xdr, nbytes);                     \
 457         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 458         BUG_ON(!p);                                             \
 459 } while (0)
 460
 461 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 462 {
 463         uint32_t *p;
 464
 465         p = xdr_reserve_space(xdr, 4 + len);
 466         BUG_ON(p == NULL);
 467         xdr_encode_opaque(p, str, len);
 468 }
 469
 470 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 471 {
 472         uint32_t *p;
 473
 474         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 475         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 476         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 477         WRITE32(hdr->taglen);
 478         WRITEMEM(hdr->tag, hdr->taglen);
 479         WRITE32(NFS4_MINOR_VERSION);
 480         WRITE32(hdr->nops);
 481         return 0;
 482 }
 483
 484 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 485 {
 486         uint32_t *p;
 487
 488         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 489         BUG_ON(p == NULL);
 490         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 491 }
 492
 493 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 494 {
 495         char owner_name[IDMAP_NAMESZ];
 496         char owner_group[IDMAP_NAMESZ];
 497         int owner_namelen = 0;
 498         int owner_grouplen = 0;
 499         uint32_t *p;
 500         uint32_t *q;
 501         int len;
 502         uint32_t bmval0 = 0;
 503         uint32_t bmval1 = 0;
 504         int status;
 505
 506         /*
 507          * We reserve enough space to write the entire attribute buffer at once.
 508          * In the worst-case, this would be
 509          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 510          *          = 36 bytes, plus any contribution from variable-length fields
 511          *            such as owner/group.
 512          */
 513         len = 16;
 514
 515         /* Sigh */
 516         if (iap->ia_valid & ATTR_SIZE)
 517                 len += 8;
 518         if (iap->ia_valid & ATTR_MODE)
 519                 len += 4;
 520         if (iap->ia_valid & ATTR_UID) {
 521                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
 522                 if (owner_namelen < 0) {
 523                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 524                                iap->ia_uid);
 525                         /* XXX */
 526                         strcpy(owner_name, "nobody");
 527                         owner_namelen = sizeof("nobody") - 1;
 528                         /* goto out; */
 529                 }
 530                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 531         }
 532         if (iap->ia_valid & ATTR_GID) {
 533                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
 534                 if (owner_grouplen < 0) {
 535                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 536                                iap->ia_gid);
 537                         strcpy(owner_group, "nobody");
 538                         owner_grouplen = sizeof("nobody") - 1;
 539                         /* goto out; */
 540                 }
 541                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 542         }
 543         if (iap->ia_valid & ATTR_ATIME_SET)
 544                 len += 16;
 545         else if (iap->ia_valid & ATTR_ATIME)
 546                 len += 4;
 547         if (iap->ia_valid & ATTR_MTIME_SET)
 548                 len += 16;
 549         else if (iap->ia_valid & ATTR_MTIME)
 550                 len += 4;
 551         RESERVE_SPACE(len);
 552
 553         /*
 554          * We write the bitmap length now, but leave the bitmap and the attribute
 555          * buffer length to be backfilled at the end of this routine.
 556          */
 557         WRITE32(2);
 558         q = p;
 559         p += 3;
 560
 561         if (iap->ia_valid & ATTR_SIZE) {
 562                 bmval0 |= FATTR4_WORD0_SIZE;
 563                 WRITE64(iap->ia_size);
 564         }
 565         if (iap->ia_valid & ATTR_MODE) {
 566                 bmval1 |= FATTR4_WORD1_MODE;
 567                 WRITE32(iap->ia_mode);
 568         }
 569         if (iap->ia_valid & ATTR_UID) {
 570                 bmval1 |= FATTR4_WORD1_OWNER;
 571                 WRITE32(owner_namelen);
 572                 WRITEMEM(owner_name, owner_namelen);
 573         }
 574         if (iap->ia_valid & ATTR_GID) {
 575                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 576                 WRITE32(owner_grouplen);
 577                 WRITEMEM(owner_group, owner_grouplen);
 578         }
 579         if (iap->ia_valid & ATTR_ATIME_SET) {
 580                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 581                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 582                 WRITE32(0);
 583                 WRITE32(iap->ia_mtime.tv_sec);
 584                 WRITE32(iap->ia_mtime.tv_nsec);
 585         }
 586         else if (iap->ia_valid & ATTR_ATIME) {
 587                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 588                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 589         }
 590         if (iap->ia_valid & ATTR_MTIME_SET) {
 591                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 592                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 593                 WRITE32(0);
 594                 WRITE32(iap->ia_mtime.tv_sec);
 595                 WRITE32(iap->ia_mtime.tv_nsec);
 596         }
 597         else if (iap->ia_valid & ATTR_MTIME) {
 598                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 599                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 600         }
 601
 602         /*
 603          * Now we backfill the bitmap and the attribute buffer length.
 604          */
 605         if (len != ((char *)p - (char *)q) + 4) {
 606                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 607                                 len, ((char *)p - (char *)q) + 4);
 608                 BUG();
 609         }
 610         len = (char *)p - (char *)q - 12;
 611         *q++ = htonl(bmval0);
 612         *q++ = htonl(bmval1);
 613         *q++ = htonl(len);
 614
 615         status = 0;
 616 /* out: */
 617         return status;
 618 }
 619
 620 static int encode_access(struct xdr_stream *xdr, u32 access)
 621 {
 622         uint32_t *p;
 623
 624         RESERVE_SPACE(8);
 625         WRITE32(OP_ACCESS);
 626         WRITE32(access);
 627
 628         return 0;
 629 }
 630
 631 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 632 {
 633         uint32_t *p;
 634
 635         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 636         WRITE32(OP_CLOSE);
 637         WRITE32(arg->seqid->sequence->counter);
 638         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 639
 640         return 0;
 641 }
 642
 643 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 644 {
 645         uint32_t *p;
 646
 647         RESERVE_SPACE(16);
 648         WRITE32(OP_COMMIT);
 649         WRITE64(args->offset);
 650         WRITE32(args->count);
 651
 652         return 0;
 653 }
 654
 655 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 656 {
 657         uint32_t *p;
 658
 659         RESERVE_SPACE(8);
 660         WRITE32(OP_CREATE);
 661         WRITE32(create->ftype);
 662
 663         switch (create->ftype) {
 664         case NF4LNK:
 665                 RESERVE_SPACE(4 + create->u.symlink->len);
 666                 WRITE32(create->u.symlink->len);
 667                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
 668                 break;
 669
 670         case NF4BLK: case NF4CHR:
 671                 RESERVE_SPACE(8);
 672                 WRITE32(create->u.device.specdata1);
 673                 WRITE32(create->u.device.specdata2);
 674                 break;
 675
 676         default:
 677                 break;
 678         }
 679
 680         RESERVE_SPACE(4 + create->name->len);
 681         WRITE32(create->name->len);
 682         WRITEMEM(create->name->name, create->name->len);
 683
 684         return encode_attrs(xdr, create->attrs, create->server);
 685 }
 686
 687 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 688 {
 689         uint32_t *p;
 690
 691         RESERVE_SPACE(12);
 692         WRITE32(OP_GETATTR);
 693         WRITE32(1);
 694         WRITE32(bitmap);
 695         return 0;
 696 }
 697
 698 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 699 {
 700         uint32_t *p;
 701
 702         RESERVE_SPACE(16);
 703         WRITE32(OP_GETATTR);
 704         WRITE32(2);
 705         WRITE32(bm0);
 706         WRITE32(bm1);
 707         return 0;
 708 }
 709
 710 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 711 {
 712         return encode_getattr_two(xdr,
 713                         bitmask[0] & nfs4_fattr_bitmap[0],
 714                         bitmask[1] & nfs4_fattr_bitmap[1]);
 715 }
 716
 717 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 718 {
 719         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 720                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 721 }
 722
 723 static int encode_getfh(struct xdr_stream *xdr)
 724 {
 725         uint32_t *p;
 726
 727         RESERVE_SPACE(4);
 728         WRITE32(OP_GETFH);
 729
 730         return 0;
 731 }
 732
 733 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 734 {
 735         uint32_t *p;
 736
 737         RESERVE_SPACE(8 + name->len);
 738         WRITE32(OP_LINK);
 739         WRITE32(name->len);
 740         WRITEMEM(name->name, name->len);
 741
 742         return 0;
 743 }
 744
 745 /*
 746  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 747  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 748  */
 749 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 750 {
 751         uint32_t *p;
 752         struct nfs_lock_opargs *opargs = arg->u.lock;
 753
 754         RESERVE_SPACE(32);
 755         WRITE32(OP_LOCK);
 756         WRITE32(arg->type);
 757         WRITE32(opargs->reclaim);
 758         WRITE64(arg->offset);
 759         WRITE64(arg->length);
 760         WRITE32(opargs->new_lock_owner);
 761         if (opargs->new_lock_owner){
 762                 RESERVE_SPACE(40);
 763                 WRITE32(opargs->open_seqid->sequence->counter);
 764                 WRITEMEM(opargs->open_stateid->data, sizeof(opargs->open_stateid->data));
 765                 WRITE32(opargs->lock_seqid->sequence->counter);
 766                 WRITE64(opargs->lock_owner.clientid);
 767                 WRITE32(4);
 768                 WRITE32(opargs->lock_owner.id);
 769         }
 770         else {
 771                 RESERVE_SPACE(20);
 772                 WRITEMEM(opargs->lock_stateid->data, sizeof(opargs->lock_stateid->data));
 773                 WRITE32(opargs->lock_seqid->sequence->counter);
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 780 {
 781         uint32_t *p;
 782         struct nfs_lowner *opargs = arg->u.lockt;
 783
 784         RESERVE_SPACE(40);
 785         WRITE32(OP_LOCKT);
 786         WRITE32(arg->type);
 787         WRITE64(arg->offset);
 788         WRITE64(arg->length);
 789         WRITE64(opargs->clientid);
 790         WRITE32(4);
 791         WRITE32(opargs->id);
 792
 793         return 0;
 794 }
 795
 796 static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg)
 797 {
 798         uint32_t *p;
 799         struct nfs_locku_opargs *opargs = arg->u.locku;
 800
 801         RESERVE_SPACE(44);
 802         WRITE32(OP_LOCKU);
 803         WRITE32(arg->type);
 804         WRITE32(opargs->seqid->sequence->counter);
 805         WRITEMEM(opargs->stateid->data, sizeof(opargs->stateid->data));
 806         WRITE64(arg->offset);
 807         WRITE64(arg->length);
 808
 809         return 0;
 810 }
 811
 812 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 813 {
 814         int len = name->len;
 815         uint32_t *p;
 816
 817         RESERVE_SPACE(8 + len);
 818         WRITE32(OP_LOOKUP);
 819         WRITE32(len);
 820         WRITEMEM(name->name, len);
 821
 822         return 0;
 823 }
 824
 825 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 826 {
 827         uint32_t *p;
 828
 829         RESERVE_SPACE(8);
 830         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 831                 case FMODE_READ:
 832                         WRITE32(NFS4_SHARE_ACCESS_READ);
 833                         break;
 834                 case FMODE_WRITE:
 835                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 836                         break;
 837                 case FMODE_READ|FMODE_WRITE:
 838                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 839                         break;
 840                 default:
 841                         BUG();
 842         }
 843         WRITE32(0);             /* for linux, share_deny = 0 always */
 844 }
 845
 846 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 847 {
 848         uint32_t *p;
 849  /*
 850  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 851  * owner 4 = 32
 852  */
 853         RESERVE_SPACE(8);
 854         WRITE32(OP_OPEN);
 855         WRITE32(arg->seqid->sequence->counter);
 856         encode_share_access(xdr, arg->open_flags);
 857         RESERVE_SPACE(16);
 858         WRITE64(arg->clientid);
 859         WRITE32(4);
 860         WRITE32(arg->id);
 861 }
 862
 863 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 864 {
 865         uint32_t *p;
 866
 867         RESERVE_SPACE(4);
 868         switch(arg->open_flags & O_EXCL) {
 869                 case 0:
 870                         WRITE32(NFS4_CREATE_UNCHECKED);
 871                         encode_attrs(xdr, arg->u.attrs, arg->server);
 872                         break;
 873                 default:
 874                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 875                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 876         }
 877 }
 878
 879 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 880 {
 881         uint32_t *p;
 882
 883         RESERVE_SPACE(4);
 884         switch (arg->open_flags & O_CREAT) {
 885                 case 0:
 886                         WRITE32(NFS4_OPEN_NOCREATE);
 887                         break;
 888                 default:
 889                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 890                         WRITE32(NFS4_OPEN_CREATE);
 891                         encode_createmode(xdr, arg);
 892         }
 893 }
 894
 895 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 896 {
 897         uint32_t *p;
 898
 899         RESERVE_SPACE(4);
 900         switch (delegation_type) {
 901                 case 0:
 902                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 903                         break;
 904                 case FMODE_READ:
 905                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 906                         break;
 907                 case FMODE_WRITE|FMODE_READ:
 908                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 909                         break;
 910                 default:
 911                         BUG();
 912         }
 913 }
 914
 915 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 916 {
 917         uint32_t *p;
 918
 919         RESERVE_SPACE(4);
 920         WRITE32(NFS4_OPEN_CLAIM_NULL);
 921         encode_string(xdr, name->len, name->name);
 922 }
 923
 924 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 925 {
 926         uint32_t *p;
 927
 928         RESERVE_SPACE(4);
 929         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 930         encode_delegation_type(xdr, type);
 931 }
 932
 933 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 934 {
 935         uint32_t *p;
 936
 937         RESERVE_SPACE(4+sizeof(stateid->data));
 938         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 939         WRITEMEM(stateid->data, sizeof(stateid->data));
 940         encode_string(xdr, name->len, name->name);
 941 }
 942
 943 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 944 {
 945         encode_openhdr(xdr, arg);
 946         encode_opentype(xdr, arg);
 947         switch (arg->claim) {
 948                 case NFS4_OPEN_CLAIM_NULL:
 949                         encode_claim_null(xdr, arg->name);
 950                         break;
 951                 case NFS4_OPEN_CLAIM_PREVIOUS:
 952                         encode_claim_previous(xdr, arg->u.delegation_type);
 953                         break;
 954                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 955                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 956                         break;
 957                 default:
 958                         BUG();
 959         }
 960         return 0;
 961 }
 962
 963 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 964 {
 965         uint32_t *p;
 966
 967         RESERVE_SPACE(8+sizeof(arg->stateid.data));
 968         WRITE32(OP_OPEN_CONFIRM);
 969         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
 970         WRITE32(arg->seqid->sequence->counter);
 971
 972         return 0;
 973 }
 974
 975 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 976 {
 977         uint32_t *p;
 978
 979         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 980         WRITE32(OP_OPEN_DOWNGRADE);
 981         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 982         WRITE32(arg->seqid->sequence->counter);
 983         encode_share_access(xdr, arg->open_flags);
 984         return 0;
 985 }
 986
 987 static int
 988 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
 989 {
 990         int len = fh->size;
 991         uint32_t *p;
 992
 993         RESERVE_SPACE(8 + len);
 994         WRITE32(OP_PUTFH);
 995         WRITE32(len);
 996         WRITEMEM(fh->data, len);
 997
 998         return 0;
 999 }
1000
1001 static int encode_putrootfh(struct xdr_stream *xdr)
1002 {
1003         uint32_t *p;
1004
1005         RESERVE_SPACE(4);
1006         WRITE32(OP_PUTROOTFH);
1007
1008         return 0;
1009 }
1010
1011 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1012 {
1013         nfs4_stateid stateid;
1014         uint32_t *p;
1015
1016         RESERVE_SPACE(16);
1017         if (ctx->state != NULL) {
1018                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1019                 WRITEMEM(stateid.data, sizeof(stateid.data));
1020         } else
1021                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1022 }
1023
1024 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1025 {
1026         uint32_t *p;
1027
1028         RESERVE_SPACE(4);
1029         WRITE32(OP_READ);
1030
1031         encode_stateid(xdr, args->context);
1032
1033         RESERVE_SPACE(12);
1034         WRITE64(args->offset);
1035         WRITE32(args->count);
1036
1037         return 0;
1038 }
1039
1040 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1041 {
1042         struct rpc_auth *auth = req->rq_task->tk_auth;
1043         uint32_t attrs[2] = {
1044                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1045                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1046         };
1047         int replen;
1048         uint32_t *p;
1049
1050         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1051         WRITE32(OP_READDIR);
1052         WRITE64(readdir->cookie);
1053         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1054         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1055         WRITE32(readdir->count);
1056         WRITE32(2);
1057         /* Switch to mounted_on_fileid if the server supports it */
1058         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1059                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1060         else
1061                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1062         WRITE32(attrs[0] & readdir->bitmask[0]);
1063         WRITE32(attrs[1] & readdir->bitmask[1]);
1064         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1065                         __FUNCTION__,
1066                         (unsigned long long)readdir->cookie,
1067                         ((u32 *)readdir->verifier.data)[0],
1068                         ((u32 *)readdir->verifier.data)[1],
1069                         attrs[0] & readdir->bitmask[0],
1070                         attrs[1] & readdir->bitmask[1]);
1071
1072         /* set up reply kvec
1073          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1074          *      + OP_READDIR + status + verifer(2)  = 9
1075          */
1076         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1077         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1078                          readdir->pgbase, readdir->count);
1079         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1080                         __FUNCTION__, replen, readdir->pages,
1081                         readdir->pgbase, readdir->count);
1082
1083         return 0;
1084 }
1085
1086 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1087 {
1088         struct rpc_auth *auth = req->rq_task->tk_auth;
1089         unsigned int replen;
1090         uint32_t *p;
1091
1092         RESERVE_SPACE(4);
1093         WRITE32(OP_READLINK);
1094
1095         /* set up reply kvec
1096          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1097          *      + OP_READLINK + status + string length = 8
1098          */
1099         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1100         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1101                         readlink->pgbase, readlink->pglen);
1102
1103         return 0;
1104 }
1105
1106 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1107 {
1108         uint32_t *p;
1109
1110         RESERVE_SPACE(8 + name->len);
1111         WRITE32(OP_REMOVE);
1112         WRITE32(name->len);
1113         WRITEMEM(name->name, name->len);
1114
1115         return 0;
1116 }
1117
1118 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1119 {
1120         uint32_t *p;
1121
1122         RESERVE_SPACE(8 + oldname->len);
1123         WRITE32(OP_RENAME);
1124         WRITE32(oldname->len);
1125         WRITEMEM(oldname->name, oldname->len);
1126
1127         RESERVE_SPACE(4 + newname->len);
1128         WRITE32(newname->len);
1129         WRITEMEM(newname->name, newname->len);
1130
1131         return 0;
1132 }
1133
1134 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1135 {
1136         uint32_t *p;
1137
1138         RESERVE_SPACE(12);
1139         WRITE32(OP_RENEW);
1140         WRITE64(client_stateid->cl_clientid);
1141
1142         return 0;
1143 }
1144
1145 static int
1146 encode_restorefh(struct xdr_stream *xdr)
1147 {
1148         uint32_t *p;
1149
1150         RESERVE_SPACE(4);
1151         WRITE32(OP_RESTOREFH);
1152
1153         return 0;
1154 }
1155
1156 static int
1157 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1158 {
1159         uint32_t *p;
1160
1161         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1162         WRITE32(OP_SETATTR);
1163         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1164         RESERVE_SPACE(2*4);
1165         WRITE32(1);
1166         WRITE32(FATTR4_WORD0_ACL);
1167         if (arg->acl_len % 4)
1168                 return -EINVAL;
1169         RESERVE_SPACE(4);
1170         WRITE32(arg->acl_len);
1171         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1172         return 0;
1173 }
1174
1175 static int
1176 encode_savefh(struct xdr_stream *xdr)
1177 {
1178         uint32_t *p;
1179
1180         RESERVE_SPACE(4);
1181         WRITE32(OP_SAVEFH);
1182
1183         return 0;
1184 }
1185
1186 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1187 {
1188         int status;
1189         uint32_t *p;
1190
1191         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1192         WRITE32(OP_SETATTR);
1193         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1194
1195         if ((status = encode_attrs(xdr, arg->iap, server)))
1196                 return status;
1197
1198         return 0;
1199 }
1200
1201 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1202 {
1203         uint32_t *p;
1204
1205         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1206         WRITE32(OP_SETCLIENTID);
1207         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1208
1209         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1210         RESERVE_SPACE(4);
1211         WRITE32(setclientid->sc_prog);
1212         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1213         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1214         RESERVE_SPACE(4);
1215         WRITE32(setclientid->sc_cb_ident);
1216
1217         return 0;
1218 }
1219
1220 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1221 {
1222         uint32_t *p;
1223
1224         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1225         WRITE32(OP_SETCLIENTID_CONFIRM);
1226         WRITE64(client_state->cl_clientid);
1227         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1228
1229         return 0;
1230 }
1231
1232 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1233 {
1234         uint32_t *p;
1235
1236         RESERVE_SPACE(4);
1237         WRITE32(OP_WRITE);
1238
1239         encode_stateid(xdr, args->context);
1240
1241         RESERVE_SPACE(16);
1242         WRITE64(args->offset);
1243         WRITE32(args->stable);
1244         WRITE32(args->count);
1245
1246         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1247
1248         return 0;
1249 }
1250
1251 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1252 {
1253         uint32_t *p;
1254
1255         RESERVE_SPACE(20);
1256
1257         WRITE32(OP_DELEGRETURN);
1258         WRITEMEM(stateid->data, sizeof(stateid->data));
1259         return 0;
1260
1261 }
1262 /*
1263  * END OF "GENERIC" ENCODE ROUTINES.
1264  */
1265
1266 /*
1267  * Encode an ACCESS request
1268  */
1269 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1270 {
1271         struct xdr_stream xdr;
1272         struct compound_hdr hdr = {
1273                 .nops = 2,
1274         };
1275         int status;
1276
1277         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1278         encode_compound_hdr(&xdr, &hdr);
1279         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1280                 status = encode_access(&xdr, args->access);
1281         return status;
1282 }
1283
1284 /*
1285  * Encode LOOKUP request
1286  */
1287 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1288 {
1289         struct xdr_stream xdr;
1290         struct compound_hdr hdr = {
1291                 .nops = 4,
1292         };
1293         int status;
1294
1295         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1296         encode_compound_hdr(&xdr, &hdr);
1297         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1298                 goto out;
1299         if ((status = encode_lookup(&xdr, args->name)) != 0)
1300                 goto out;
1301         if ((status = encode_getfh(&xdr)) != 0)
1302                 goto out;
1303         status = encode_getfattr(&xdr, args->bitmask);
1304 out:
1305         return status;
1306 }
1307
1308 /*
1309  * Encode LOOKUP_ROOT request
1310  */
1311 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1312 {
1313         struct xdr_stream xdr;
1314         struct compound_hdr hdr = {
1315                 .nops = 3,
1316         };
1317         int status;
1318
1319         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1320         encode_compound_hdr(&xdr, &hdr);
1321         if ((status = encode_putrootfh(&xdr)) != 0)
1322                 goto out;
1323         if ((status = encode_getfh(&xdr)) == 0)
1324                 status = encode_getfattr(&xdr, args->bitmask);
1325 out:
1326         return status;
1327 }
1328
1329 /*
1330  * Encode REMOVE request
1331  */
1332 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1333 {
1334         struct xdr_stream xdr;
1335         struct compound_hdr hdr = {
1336                 .nops = 3,
1337         };
1338         int status;
1339
1340         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1341         encode_compound_hdr(&xdr, &hdr);
1342         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1343                 goto out;
1344         if ((status = encode_remove(&xdr, args->name)) != 0)
1345                 goto out;
1346         status = encode_getfattr(&xdr, args->bitmask);
1347 out:
1348         return status;
1349 }
1350
1351 /*
1352  * Encode RENAME request
1353  */
1354 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1355 {
1356         struct xdr_stream xdr;
1357         struct compound_hdr hdr = {
1358                 .nops = 7,
1359         };
1360         int status;
1361
1362         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1363         encode_compound_hdr(&xdr, &hdr);
1364         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1365                 goto out;
1366         if ((status = encode_savefh(&xdr)) != 0)
1367                 goto out;
1368         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1369                 goto out;
1370         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1371                 goto out;
1372         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1373                 goto out;
1374         if ((status = encode_restorefh(&xdr)) != 0)
1375                 goto out;
1376         status = encode_getfattr(&xdr, args->bitmask);
1377 out:
1378         return status;
1379 }
1380
1381 /*
1382  * Encode LINK request
1383  */
1384 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1385 {
1386         struct xdr_stream xdr;
1387         struct compound_hdr hdr = {
1388                 .nops = 7,
1389         };
1390         int status;
1391
1392         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1393         encode_compound_hdr(&xdr, &hdr);
1394         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1395                 goto out;
1396         if ((status = encode_savefh(&xdr)) != 0)
1397                 goto out;
1398         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1399                 goto out;
1400         if ((status = encode_link(&xdr, args->name)) != 0)
1401                 goto out;
1402         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1403                 goto out;
1404         if ((status = encode_restorefh(&xdr)) != 0)
1405                 goto out;
1406         status = encode_getfattr(&xdr, args->bitmask);
1407 out:
1408         return status;
1409 }
1410
1411 /*
1412  * Encode CREATE request
1413  */
1414 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1415 {
1416         struct xdr_stream xdr;
1417         struct compound_hdr hdr = {
1418                 .nops = 7,
1419         };
1420         int status;
1421
1422         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1423         encode_compound_hdr(&xdr, &hdr);
1424         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1425                 goto out;
1426         if ((status = encode_savefh(&xdr)) != 0)
1427                 goto out;
1428         if ((status = encode_create(&xdr, args)) != 0)
1429                 goto out;
1430         if ((status = encode_getfh(&xdr)) != 0)
1431                 goto out;
1432         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1433                 goto out;
1434         if ((status = encode_restorefh(&xdr)) != 0)
1435                 goto out;
1436         status = encode_getfattr(&xdr, args->bitmask);
1437 out:
1438         return status;
1439 }
1440
1441 /*
1442  * Encode SYMLINK request
1443  */
1444 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1445 {
1446         return nfs4_xdr_enc_create(req, p, args);
1447 }
1448
1449 /*
1450  * Encode GETATTR request
1451  */
1452 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1453 {
1454         struct xdr_stream xdr;
1455         struct compound_hdr hdr = {
1456                 .nops = 2,
1457         };
1458         int status;
1459
1460         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1461         encode_compound_hdr(&xdr, &hdr);
1462         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1463                 status = encode_getfattr(&xdr, args->bitmask);
1464         return status;
1465 }
1466
1467 /*
1468  * Encode a CLOSE request
1469  */
1470 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1471 {
1472         struct xdr_stream xdr;
1473         struct compound_hdr hdr = {
1474                 .nops   = 3,
1475         };
1476         int status;
1477
1478         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1479         encode_compound_hdr(&xdr, &hdr);
1480         status = encode_putfh(&xdr, args->fh);
1481         if(status)
1482                 goto out;
1483         status = encode_close(&xdr, args);
1484         if (status != 0)
1485                 goto out;
1486         status = encode_getfattr(&xdr, args->bitmask);
1487 out:
1488         return status;
1489 }
1490
1491 /*
1492  * Encode an OPEN request
1493  */
1494 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1495 {
1496         struct xdr_stream xdr;
1497         struct compound_hdr hdr = {
1498                 .nops = 7,
1499         };
1500         int status;
1501
1502         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1503         if (status != 0)
1504                 goto out;
1505         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1506         encode_compound_hdr(&xdr, &hdr);
1507         status = encode_putfh(&xdr, args->fh);
1508         if (status)
1509                 goto out;
1510         status = encode_savefh(&xdr);
1511         if (status)
1512                 goto out;
1513         status = encode_open(&xdr, args);
1514         if (status)
1515                 goto out;
1516         status = encode_getfh(&xdr);
1517         if (status)
1518                 goto out;
1519         status = encode_getfattr(&xdr, args->bitmask);
1520         if (status)
1521                 goto out;
1522         status = encode_restorefh(&xdr);
1523         if (status)
1524                 goto out;
1525         status = encode_getfattr(&xdr, args->bitmask);
1526 out:
1527         return status;
1528 }
1529
1530 /*
1531  * Encode an OPEN_CONFIRM request
1532  */
1533 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1534 {
1535         struct xdr_stream xdr;
1536         struct compound_hdr hdr = {
1537                 .nops   = 2,
1538         };
1539         int status;
1540
1541         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1542         if (status != 0)
1543                 goto out;
1544         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1545         encode_compound_hdr(&xdr, &hdr);
1546         status = encode_putfh(&xdr, args->fh);
1547         if(status)
1548                 goto out;
1549         status = encode_open_confirm(&xdr, args);
1550 out:
1551         return status;
1552 }
1553
1554 /*
1555  * Encode an OPEN request with no attributes.
1556  */
1557 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1558 {
1559         struct xdr_stream xdr;
1560         struct compound_hdr hdr = {
1561                 .nops   = 2,
1562         };
1563         int status;
1564
1565         status = nfs_wait_on_sequence(args->seqid, req->rq_task);
1566         if (status != 0)
1567                 goto out;
1568         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1569         encode_compound_hdr(&xdr, &hdr);
1570         status = encode_putfh(&xdr, args->fh);
1571         if (status)
1572                 goto out;
1573         status = encode_open(&xdr, args);
1574 out:
1575         return status;
1576 }
1577
1578 /*
1579  * Encode an OPEN_DOWNGRADE request
1580  */
1581 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1582 {
1583         struct xdr_stream xdr;
1584         struct compound_hdr hdr = {
1585                 .nops   = 3,
1586         };
1587         int status;
1588
1589         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1590         encode_compound_hdr(&xdr, &hdr);
1591         status = encode_putfh(&xdr, args->fh);
1592         if (status)
1593                 goto out;
1594         status = encode_open_downgrade(&xdr, args);
1595         if (status != 0)
1596                 goto out;
1597         status = encode_getfattr(&xdr, args->bitmask);
1598 out:
1599         return status;
1600 }
1601
1602 /*
1603  * Encode a LOCK request
1604  */
1605 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1606 {
1607         struct xdr_stream xdr;
1608         struct compound_hdr hdr = {
1609                 .nops   = 2,
1610         };
1611         struct nfs_lock_opargs *opargs = args->u.lock;
1612         int status;
1613
1614         status = nfs_wait_on_sequence(opargs->lock_seqid, req->rq_task);
1615         if (status != 0)
1616                 goto out;
1617         /* Do we need to do an open_to_lock_owner? */
1618         if (opargs->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)
1619                 opargs->new_lock_owner = 0;
1620         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1621         encode_compound_hdr(&xdr, &hdr);
1622         status = encode_putfh(&xdr, args->fh);
1623         if(status)
1624                 goto out;
1625         status = encode_lock(&xdr, args);
1626 out:
1627         return status;
1628 }
1629
1630 /*
1631  * Encode a LOCKT request
1632  */
1633 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1634 {
1635         struct xdr_stream xdr;
1636         struct compound_hdr hdr = {
1637                 .nops   = 2,
1638         };
1639         int status;
1640
1641         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1642         encode_compound_hdr(&xdr, &hdr);
1643         status = encode_putfh(&xdr, args->fh);
1644         if(status)
1645                 goto out;
1646         status = encode_lockt(&xdr, args);
1647 out:
1648         return status;
1649 }
1650
1651 /*
1652  * Encode a LOCKU request
1653  */
1654 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_lockargs *args)
1655 {
1656         struct xdr_stream xdr;
1657         struct compound_hdr hdr = {
1658                 .nops   = 2,
1659         };
1660         int status;
1661
1662         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1663         encode_compound_hdr(&xdr, &hdr);
1664         status = encode_putfh(&xdr, args->fh);
1665         if(status)
1666                 goto out;
1667         status = encode_locku(&xdr, args);
1668 out:
1669         return status;
1670 }
1671
1672 /*
1673  * Encode a READLINK request
1674  */
1675 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1676 {
1677         struct xdr_stream xdr;
1678         struct compound_hdr hdr = {
1679                 .nops = 2,
1680         };
1681         int status;
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, &hdr);
1685         status = encode_putfh(&xdr, args->fh);
1686         if(status)
1687                 goto out;
1688         status = encode_readlink(&xdr, args, req);
1689 out:
1690         return status;
1691 }
1692
1693 /*
1694  * Encode a READDIR request
1695  */
1696 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1697 {
1698         struct xdr_stream xdr;
1699         struct compound_hdr hdr = {
1700                 .nops = 2,
1701         };
1702         int status;
1703
1704         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1705         encode_compound_hdr(&xdr, &hdr);
1706         status = encode_putfh(&xdr, args->fh);
1707         if(status)
1708                 goto out;
1709         status = encode_readdir(&xdr, args, req);
1710 out:
1711         return status;
1712 }
1713
1714 /*
1715  * Encode a READ request
1716  */
1717 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1718 {
1719         struct rpc_auth *auth = req->rq_task->tk_auth;
1720         struct xdr_stream xdr;
1721         struct compound_hdr hdr = {
1722                 .nops = 2,
1723         };
1724         int replen, status;
1725
1726         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1727         encode_compound_hdr(&xdr, &hdr);
1728         status = encode_putfh(&xdr, args->fh);
1729         if (status)
1730                 goto out;
1731         status = encode_read(&xdr, args);
1732         if (status)
1733                 goto out;
1734
1735         /* set up reply kvec
1736          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1737          *       + OP_READ + status + eof + datalen = 9
1738          */
1739         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1740         xdr_inline_pages(&req->rq_rcv_buf, replen,
1741                          args->pages, args->pgbase, args->count);
1742 out:
1743         return status;
1744 }
1745
1746 /*
1747  * Encode an SETATTR request
1748  */
1749 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1750
1751 {
1752         struct xdr_stream xdr;
1753         struct compound_hdr hdr = {
1754                 .nops   = 3,
1755         };
1756         int status;
1757
1758         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1759         encode_compound_hdr(&xdr, &hdr);
1760         status = encode_putfh(&xdr, args->fh);
1761         if(status)
1762                 goto out;
1763         status = encode_setattr(&xdr, args, args->server);
1764         if(status)
1765                 goto out;
1766         status = encode_getfattr(&xdr, args->bitmask);
1767 out:
1768         return status;
1769 }
1770
1771 /*
1772  * Encode a GETACL request
1773  */
1774 static int
1775 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1776                 struct nfs_getaclargs *args)
1777 {
1778         struct xdr_stream xdr;
1779         struct rpc_auth *auth = req->rq_task->tk_auth;
1780         struct compound_hdr hdr = {
1781                 .nops   = 2,
1782         };
1783         int replen, status;
1784
1785         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1786         encode_compound_hdr(&xdr, &hdr);
1787         status = encode_putfh(&xdr, args->fh);
1788         if (status)
1789                 goto out;
1790         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1791         /* set up reply buffer: */
1792         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1793         xdr_inline_pages(&req->rq_rcv_buf, replen,
1794                 args->acl_pages, args->acl_pgbase, args->acl_len);
1795 out:
1796         return status;
1797 }
1798
1799 /*
1800  * Encode a WRITE request
1801  */
1802 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1803 {
1804         struct xdr_stream xdr;
1805         struct compound_hdr hdr = {
1806                 .nops = 3,
1807         };
1808         int status;
1809
1810         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1811         encode_compound_hdr(&xdr, &hdr);
1812         status = encode_putfh(&xdr, args->fh);
1813         if (status)
1814                 goto out;
1815         status = encode_write(&xdr, args);
1816         if (status)
1817                 goto out;
1818         status = encode_getfattr(&xdr, args->bitmask);
1819 out:
1820         return status;
1821 }
1822
1823 /*
1824  *  a COMMIT request
1825  */
1826 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1827 {
1828         struct xdr_stream xdr;
1829         struct compound_hdr hdr = {
1830                 .nops = 3,
1831         };
1832         int status;
1833
1834         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1835         encode_compound_hdr(&xdr, &hdr);
1836         status = encode_putfh(&xdr, args->fh);
1837         if (status)
1838                 goto out;
1839         status = encode_commit(&xdr, args);
1840         if (status)
1841                 goto out;
1842         status = encode_getfattr(&xdr, args->bitmask);
1843 out:
1844         return status;
1845 }
1846
1847 /*
1848  * FSINFO request
1849  */
1850 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1851 {
1852         struct xdr_stream xdr;
1853         struct compound_hdr hdr = {
1854                 .nops   = 2,
1855         };
1856         int status;
1857
1858         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1859         encode_compound_hdr(&xdr, &hdr);
1860         status = encode_putfh(&xdr, args->fh);
1861         if (!status)
1862                 status = encode_fsinfo(&xdr, args->bitmask);
1863         return status;
1864 }
1865
1866 /*
1867  * a PATHCONF request
1868  */
1869 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1870 {
1871         struct xdr_stream xdr;
1872         struct compound_hdr hdr = {
1873                 .nops = 2,
1874         };
1875         int status;
1876
1877         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1878         encode_compound_hdr(&xdr, &hdr);
1879         status = encode_putfh(&xdr, args->fh);
1880         if (!status)
1881                 status = encode_getattr_one(&xdr,
1882                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1883         return status;
1884 }
1885
1886 /*
1887  * a STATFS request
1888  */
1889 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1890 {
1891         struct xdr_stream xdr;
1892         struct compound_hdr hdr = {
1893                 .nops = 2,
1894         };
1895         int status;
1896
1897         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1898         encode_compound_hdr(&xdr, &hdr);
1899         status = encode_putfh(&xdr, args->fh);
1900         if (status == 0)
1901                 status = encode_getattr_two(&xdr,
1902                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1903                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1904         return status;
1905 }
1906
1907 /*
1908  * GETATTR_BITMAP request
1909  */
1910 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1911 {
1912         struct xdr_stream xdr;
1913         struct compound_hdr hdr = {
1914                 .nops = 2,
1915         };
1916         int status;
1917
1918         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1919         encode_compound_hdr(&xdr, &hdr);
1920         status = encode_putfh(&xdr, fhandle);
1921         if (status == 0)
1922                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1923                                 FATTR4_WORD0_LINK_SUPPORT|
1924                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1925                                 FATTR4_WORD0_ACLSUPPORT);
1926         return status;
1927 }
1928
1929 /*
1930  * a RENEW request
1931  */
1932 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1933 {
1934         struct xdr_stream xdr;
1935         struct compound_hdr hdr = {
1936                 .nops   = 1,
1937         };
1938
1939         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1940         encode_compound_hdr(&xdr, &hdr);
1941         return encode_renew(&xdr, clp);
1942 }
1943
1944 /*
1945  * a SETCLIENTID request
1946  */
1947 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1948 {
1949         struct xdr_stream xdr;
1950         struct compound_hdr hdr = {
1951                 .nops   = 1,
1952         };
1953
1954         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1955         encode_compound_hdr(&xdr, &hdr);
1956         return encode_setclientid(&xdr, sc);
1957 }
1958
1959 /*
1960  * a SETCLIENTID_CONFIRM request
1961  */
1962 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1963 {
1964         struct xdr_stream xdr;
1965         struct compound_hdr hdr = {
1966                 .nops   = 3,
1967         };
1968         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1969         int status;
1970
1971         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1972         encode_compound_hdr(&xdr, &hdr);
1973         status = encode_setclientid_confirm(&xdr, clp);
1974         if (!status)
1975                 status = encode_putrootfh(&xdr);
1976         if (!status)
1977                 status = encode_fsinfo(&xdr, lease_bitmap);
1978         return status;
1979 }
1980
1981 /*
1982  * DELEGRETURN request
1983  */
1984 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1985 {
1986         struct xdr_stream xdr;
1987         struct compound_hdr hdr = {
1988                 .nops = 2,
1989         };
1990         int status;
1991
1992         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1993         encode_compound_hdr(&xdr, &hdr);
1994         if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
1995                 status = encode_delegreturn(&xdr, args->stateid);
1996         return status;
1997 }
1998
1999 /*
2000  * START OF "GENERIC" DECODE ROUTINES.
2001  *   These may look a little ugly since they are imported from a "generic"
2002  * set of XDR encode/decode routines which are intended to be shared by
2003  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2004  *
2005  * If the pain of reading these is too great, it should be a straightforward
2006  * task to translate them into Linux-specific versions which are more
2007  * consistent with the style used in NFSv2/v3...
2008  */
2009 #define READ32(x)         (x) = ntohl(*p++)
2010 #define READ64(x)         do {                  \
2011         (x) = (u64)ntohl(*p++) << 32;           \
2012         (x) |= ntohl(*p++);                     \
2013 } while (0)
2014 #define READTIME(x)       do {                  \
2015         p++;                                    \
2016         (x.tv_sec) = ntohl(*p++);               \
2017         (x.tv_nsec) = ntohl(*p++);              \
2018 } while (0)
2019 #define COPYMEM(x,nbytes) do {                  \
2020         memcpy((x), p, nbytes);                 \
2021         p += XDR_QUADLEN(nbytes);               \
2022 } while (0)
2023
2024 #define READ_BUF(nbytes)  do { \
2025         p = xdr_inline_decode(xdr, nbytes); \
2026         if (!p) { \
2027                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2028                                 __FUNCTION__, __LINE__); \
2029                 return -EIO; \
2030         } \
2031 } while (0)
2032
2033 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
2034 {
2035         uint32_t *p;
2036
2037         READ_BUF(4);
2038         READ32(*len);
2039         READ_BUF(*len);
2040         *string = (char *)p;
2041         return 0;
2042 }
2043
2044 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2045 {
2046         uint32_t *p;
2047
2048         READ_BUF(8);
2049         READ32(hdr->status);
2050         READ32(hdr->taglen);
2051
2052         READ_BUF(hdr->taglen + 4);
2053         hdr->tag = (char *)p;
2054         p += XDR_QUADLEN(hdr->taglen);
2055         READ32(hdr->nops);
2056         return 0;
2057 }
2058
2059 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2060 {
2061         uint32_t *p;
2062         uint32_t opnum;
2063         int32_t nfserr;
2064
2065         READ_BUF(8);
2066         READ32(opnum);
2067         if (opnum != expected) {
2068                 printk(KERN_NOTICE
2069                                 "nfs4_decode_op_hdr: Server returned operation"
2070                                 " %d but we issued a request for %d\n",
2071                                 opnum, expected);
2072                 return -EIO;
2073         }
2074         READ32(nfserr);
2075         if (nfserr != NFS_OK)
2076                 return -nfs_stat_to_errno(nfserr);
2077         return 0;
2078 }
2079
2080 /* Dummy routine */
2081 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2082 {
2083         uint32_t *p;
2084         uint32_t strlen;
2085         char *str;
2086
2087         READ_BUF(12);
2088         return decode_opaque_inline(xdr, &strlen, &str);
2089 }
2090
2091 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2092 {
2093         uint32_t bmlen, *p;
2094
2095         READ_BUF(4);
2096         READ32(bmlen);
2097
2098         bitmap[0] = bitmap[1] = 0;
2099         READ_BUF((bmlen << 2));
2100         if (bmlen > 0) {
2101                 READ32(bitmap[0]);
2102                 if (bmlen > 1)
2103                         READ32(bitmap[1]);
2104         }
2105         return 0;
2106 }
2107
2108 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2109 {
2110         uint32_t *p;
2111
2112         READ_BUF(4);
2113         READ32(*attrlen);
2114         *savep = xdr->p;
2115         return 0;
2116 }
2117
2118 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2119 {
2120         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2121                 decode_attr_bitmap(xdr, bitmask);
2122                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2123         } else
2124                 bitmask[0] = bitmask[1] = 0;
2125         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2126         return 0;
2127 }
2128
2129 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2130 {
2131         uint32_t *p;
2132
2133         *type = 0;
2134         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2135                 return -EIO;
2136         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2137                 READ_BUF(4);
2138                 READ32(*type);
2139                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2140                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2141                         return -EIO;
2142                 }
2143                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2144         }
2145         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2146         return 0;
2147 }
2148
2149 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2150 {
2151         uint32_t *p;
2152
2153         *change = 0;
2154         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2155                 return -EIO;
2156         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2157                 READ_BUF(8);
2158                 READ64(*change);
2159                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2160         }
2161         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2162                         (unsigned long long)*change);
2163         return 0;
2164 }
2165
2166 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2167 {
2168         uint32_t *p;
2169
2170         *size = 0;
2171         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2172                 return -EIO;
2173         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2174                 READ_BUF(8);
2175                 READ64(*size);
2176                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2177         }
2178         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2179         return 0;
2180 }
2181
2182 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2183 {
2184         uint32_t *p;
2185
2186         *res = 0;
2187         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2188                 return -EIO;
2189         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2190                 READ_BUF(4);
2191                 READ32(*res);
2192                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2193         }
2194         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2195         return 0;
2196 }
2197
2198 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2199 {
2200         uint32_t *p;
2201
2202         *res = 0;
2203         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2204                 return -EIO;
2205         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2206                 READ_BUF(4);
2207                 READ32(*res);
2208                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2209         }
2210         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2211         return 0;
2212 }
2213
2214 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2215 {
2216         uint32_t *p;
2217
2218         fsid->major = 0;
2219         fsid->minor = 0;
2220         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2221                 return -EIO;
2222         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2223                 READ_BUF(16);
2224                 READ64(fsid->major);
2225                 READ64(fsid->minor);
2226                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2227         }
2228         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2229                         (unsigned long long)fsid->major,
2230                         (unsigned long long)fsid->minor);
2231         return 0;
2232 }
2233
2234 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2235 {
2236         uint32_t *p;
2237
2238         *res = 60;
2239         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2240                 return -EIO;
2241         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2242                 READ_BUF(4);
2243                 READ32(*res);
2244                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2245         }
2246         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2247         return 0;
2248 }
2249
2250 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2251 {
2252         uint32_t *p;
2253
2254         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2255         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2256                 return -EIO;
2257         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2258                 READ_BUF(4);
2259                 READ32(*res);
2260                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2261         }
2262         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2263         return 0;
2264 }
2265
2266 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2267 {
2268         uint32_t *p;
2269
2270         *fileid = 0;
2271         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2272                 return -EIO;
2273         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2274                 READ_BUF(8);
2275                 READ64(*fileid);
2276                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2277         }
2278         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2279         return 0;
2280 }
2281
2282 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2283 {
2284         uint32_t *p;
2285         int status = 0;
2286
2287         *res = 0;
2288         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2289                 return -EIO;
2290         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2291                 READ_BUF(8);
2292                 READ64(*res);
2293                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2294         }
2295         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2296         return status;
2297 }
2298
2299 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2300 {
2301         uint32_t *p;
2302         int status = 0;
2303
2304         *res = 0;
2305         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2306                 return -EIO;
2307         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2308                 READ_BUF(8);
2309                 READ64(*res);
2310                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2311         }
2312         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2313         return status;
2314 }
2315
2316 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2317 {
2318         uint32_t *p;
2319         int status = 0;
2320
2321         *res = 0;
2322         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2323                 return -EIO;
2324         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2325                 READ_BUF(8);
2326                 READ64(*res);
2327                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2328         }
2329         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2330         return status;
2331 }
2332
2333 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2334 {
2335         uint32_t *p;
2336         int status = 0;
2337
2338         *res = 0;
2339         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2340                 return -EIO;
2341         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2342                 READ_BUF(8);
2343                 READ64(*res);
2344                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2345         }
2346         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2347         return status;
2348 }
2349
2350 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2351 {
2352         uint32_t *p;
2353         int status = 0;
2354
2355         *maxlink = 1;
2356         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2357                 return -EIO;
2358         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2359                 READ_BUF(4);
2360                 READ32(*maxlink);
2361                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2362         }
2363         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2364         return status;
2365 }
2366
2367 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2368 {
2369         uint32_t *p;
2370         int status = 0;
2371
2372         *maxname = 1024;
2373         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2374                 return -EIO;
2375         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2376                 READ_BUF(4);
2377                 READ32(*maxname);
2378                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2379         }
2380         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2381         return status;
2382 }
2383
2384 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2385 {
2386         uint32_t *p;
2387         int status = 0;
2388
2389         *res = 1024;
2390         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2391                 return -EIO;
2392         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2393                 uint64_t maxread;
2394                 READ_BUF(8);
2395                 READ64(maxread);
2396                 if (maxread > 0x7FFFFFFF)
2397                         maxread = 0x7FFFFFFF;
2398                 *res = (uint32_t)maxread;
2399                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2400         }
2401         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2402         return status;
2403 }
2404
2405 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2406 {
2407         uint32_t *p;
2408         int status = 0;
2409
2410         *res = 1024;
2411         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2412                 return -EIO;
2413         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2414                 uint64_t maxwrite;
2415                 READ_BUF(8);
2416                 READ64(maxwrite);
2417                 if (maxwrite > 0x7FFFFFFF)
2418                         maxwrite = 0x7FFFFFFF;
2419                 *res = (uint32_t)maxwrite;
2420                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2421         }
2422         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2423         return status;
2424 }
2425
2426 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2427 {
2428         uint32_t *p;
2429
2430         *mode = 0;
2431         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2432                 return -EIO;
2433         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2434                 READ_BUF(4);
2435                 READ32(*mode);
2436                 *mode &= ~S_IFMT;
2437                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2438         }
2439         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2440         return 0;
2441 }
2442
2443 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2444 {
2445         uint32_t *p;
2446
2447         *nlink = 1;
2448         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2449                 return -EIO;
2450         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2451                 READ_BUF(4);
2452                 READ32(*nlink);
2453                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2454         }
2455         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2456         return 0;
2457 }
2458
2459 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2460 {
2461         uint32_t len, *p;
2462
2463         *uid = -2;
2464         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2465                 return -EIO;
2466         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2467                 READ_BUF(4);
2468                 READ32(len);
2469                 READ_BUF(len);
2470                 if (len < XDR_MAX_NETOBJ) {
2471                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2472                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2473                                                 __FUNCTION__);
2474                 } else
2475                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2476                                         __FUNCTION__, len);
2477                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2478         }
2479         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2480         return 0;
2481 }
2482
2483 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2484 {
2485         uint32_t len, *p;
2486
2487         *gid = -2;
2488         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2489                 return -EIO;
2490         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2491                 READ_BUF(4);
2492                 READ32(len);
2493                 READ_BUF(len);
2494                 if (len < XDR_MAX_NETOBJ) {
2495                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2496                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2497                                                 __FUNCTION__);
2498                 } else
2499                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2500                                         __FUNCTION__, len);
2501                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2502         }
2503         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2504         return 0;
2505 }
2506
2507 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2508 {
2509         uint32_t major = 0, minor = 0, *p;
2510
2511         *rdev = MKDEV(0,0);
2512         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2513                 return -EIO;
2514         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2515                 dev_t tmp;
2516
2517                 READ_BUF(8);
2518                 READ32(major);
2519                 READ32(minor);
2520                 tmp = MKDEV(major, minor);
2521                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2522                         *rdev = tmp;
2523                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2524         }
2525         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2526         return 0;
2527 }
2528
2529 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2530 {
2531         uint32_t *p;
2532         int status = 0;
2533
2534         *res = 0;
2535         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2536                 return -EIO;
2537         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2538                 READ_BUF(8);
2539                 READ64(*res);
2540                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2541         }
2542         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2543         return status;
2544 }
2545
2546 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2547 {
2548         uint32_t *p;
2549         int status = 0;
2550
2551         *res = 0;
2552         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2553                 return -EIO;
2554         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2555                 READ_BUF(8);
2556                 READ64(*res);
2557                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2558         }
2559         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2560         return status;
2561 }
2562
2563 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2564 {
2565         uint32_t *p;
2566         int status = 0;
2567
2568         *res = 0;
2569         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2570                 return -EIO;
2571         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2572                 READ_BUF(8);
2573                 READ64(*res);
2574                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2575         }
2576         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2577         return status;
2578 }
2579
2580 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2581 {
2582         uint32_t *p;
2583
2584         *used = 0;
2585         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2586                 return -EIO;
2587         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2588                 READ_BUF(8);
2589                 READ64(*used);
2590                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2591         }
2592         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2593                         (unsigned long long)*used);
2594         return 0;
2595 }
2596
2597 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2598 {
2599         uint32_t *p;
2600         uint64_t sec;
2601         uint32_t nsec;
2602
2603         READ_BUF(12);
2604         READ64(sec);
2605         READ32(nsec);
2606         time->tv_sec = (time_t)sec;
2607         time->tv_nsec = (long)nsec;
2608         return 0;
2609 }
2610
2611 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2612 {
2613         int status = 0;
2614
2615         time->tv_sec = 0;
2616         time->tv_nsec = 0;
2617         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2618                 return -EIO;
2619         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2620                 status = decode_attr_time(xdr, time);
2621                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2622         }
2623         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2624         return status;
2625 }
2626
2627 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2628 {
2629         int status = 0;
2630
2631         time->tv_sec = 0;
2632         time->tv_nsec = 0;
2633         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2634                 return -EIO;
2635         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2636                 status = decode_attr_time(xdr, time);
2637                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2638         }
2639         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2640         return status;
2641 }
2642
2643 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2644 {
2645         int status = 0;
2646
2647         time->tv_sec = 0;
2648         time->tv_nsec = 0;
2649         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2650                 return -EIO;
2651         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2652                 status = decode_attr_time(xdr, time);
2653                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2654         }
2655         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2656         return status;
2657 }
2658
2659 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2660 {
2661         unsigned int attrwords = XDR_QUADLEN(attrlen);
2662         unsigned int nwords = xdr->p - savep;
2663
2664         if (unlikely(attrwords != nwords)) {
2665                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2666                                 __FUNCTION__,
2667                                 attrwords << 2,
2668                                 (attrwords < nwords) ? '<' : '>',
2669                                 nwords << 2);
2670                 return -EIO;
2671         }
2672         return 0;
2673 }
2674
2675 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2676 {
2677         uint32_t *p;
2678
2679         READ_BUF(20);
2680         READ32(cinfo->atomic);
2681         READ64(cinfo->before);
2682         READ64(cinfo->after);
2683         return 0;
2684 }
2685
2686 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2687 {
2688         uint32_t *p;
2689         uint32_t supp, acc;
2690         int status;
2691
2692         status = decode_op_hdr(xdr, OP_ACCESS);
2693         if (status)
2694                 return status;
2695         READ_BUF(8);
2696         READ32(supp);
2697         READ32(acc);
2698         access->supported = supp;
2699         access->access = acc;
2700         return 0;
2701 }
2702
2703 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2704 {
2705         uint32_t *p;
2706         int status;
2707
2708         status = decode_op_hdr(xdr, OP_CLOSE);
2709         if (status)
2710                 return status;
2711         READ_BUF(sizeof(res->stateid.data));
2712         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2713         return 0;
2714 }
2715
2716 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2717 {
2718         uint32_t *p;
2719         int status;
2720
2721         status = decode_op_hdr(xdr, OP_COMMIT);
2722         if (status)
2723                 return status;
2724         READ_BUF(8);
2725         COPYMEM(res->verf->verifier, 8);
2726         return 0;
2727 }
2728
2729 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2730 {
2731         uint32_t *p;
2732         uint32_t bmlen;
2733         int status;
2734
2735         status = decode_op_hdr(xdr, OP_CREATE);
2736         if (status)
2737                 return status;
2738         if ((status = decode_change_info(xdr, cinfo)))
2739                 return status;
2740         READ_BUF(4);
2741         READ32(bmlen);
2742         READ_BUF(bmlen << 2);
2743         return 0;
2744 }
2745
2746 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2747 {
2748         uint32_t *savep;
2749         uint32_t attrlen,
2750                  bitmap[2] = {0};
2751         int status;
2752
2753         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2754                 goto xdr_error;
2755         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2756                 goto xdr_error;
2757         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2758                 goto xdr_error;
2759         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2760                 goto xdr_error;
2761         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2762                 goto xdr_error;
2763         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2764                 goto xdr_error;
2765         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2766                 goto xdr_error;
2767         status = verify_attr_len(xdr, savep, attrlen);
2768 xdr_error:
2769         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2770         return status;
2771 }
2772
2773 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2774 {
2775         uint32_t *savep;
2776         uint32_t attrlen,
2777                  bitmap[2] = {0};
2778         int status;
2779
2780         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2781                 goto xdr_error;
2782         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2783                 goto xdr_error;
2784         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2785                 goto xdr_error;
2786
2787         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2788                 goto xdr_error;
2789         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2790                 goto xdr_error;
2791         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2792                 goto xdr_error;
2793         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2794                 goto xdr_error;
2795         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2796                 goto xdr_error;
2797         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2798                 goto xdr_error;
2799
2800         status = verify_attr_len(xdr, savep, attrlen);
2801 xdr_error:
2802         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2803         return status;
2804 }
2805
2806 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2807 {
2808         uint32_t *savep;
2809         uint32_t attrlen,
2810                  bitmap[2] = {0};
2811         int status;
2812
2813         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2814                 goto xdr_error;
2815         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2816                 goto xdr_error;
2817         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2818                 goto xdr_error;
2819
2820         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2821                 goto xdr_error;
2822         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2823                 goto xdr_error;
2824
2825         status = verify_attr_len(xdr, savep, attrlen);
2826 xdr_error:
2827         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2828         return status;
2829 }
2830
2831 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2832 {
2833         uint32_t *savep;
2834         uint32_t attrlen,
2835                  bitmap[2] = {0},
2836                  type;
2837         int status, fmode = 0;
2838
2839         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2840                 goto xdr_error;
2841         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2842                 goto xdr_error;
2843
2844         fattr->bitmap[0] = bitmap[0];
2845         fattr->bitmap[1] = bitmap[1];
2846
2847         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2848                 goto xdr_error;
2849
2850
2851         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2852                 goto xdr_error;
2853         fattr->type = nfs_type2fmt[type].nfs2type;
2854         fmode = nfs_type2fmt[type].mode;
2855
2856         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2857                 goto xdr_error;
2858         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2859                 goto xdr_error;
2860         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2861                 goto xdr_error;
2862         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2863                 goto xdr_error;
2864         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2865                 goto xdr_error;
2866         fattr->mode |= fmode;
2867         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2868                 goto xdr_error;
2869         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2870                 goto xdr_error;
2871         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2872                 goto xdr_error;
2873         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2876                 goto xdr_error;
2877         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2878                 goto xdr_error;
2879         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2880                 goto xdr_error;
2881         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2882                 goto xdr_error;
2883         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2884                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2885 xdr_error:
2886         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2887         return status;
2888 }
2889
2890
2891 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2892 {
2893         uint32_t *savep;
2894         uint32_t attrlen, bitmap[2];
2895         int status;
2896
2897         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2898                 goto xdr_error;
2899         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2900                 goto xdr_error;
2901         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2902                 goto xdr_error;
2903
2904         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2905
2906         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2907                 goto xdr_error;
2908         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2909                 goto xdr_error;
2910         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2911                 goto xdr_error;
2912         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2913         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2914                 goto xdr_error;
2915         fsinfo->wtpref = fsinfo->wtmax;
2916
2917         status = verify_attr_len(xdr, savep, attrlen);
2918 xdr_error:
2919         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2920         return status;
2921 }
2922
2923 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2924 {
2925         uint32_t *p;
2926         uint32_t len;
2927         int status;
2928
2929         status = decode_op_hdr(xdr, OP_GETFH);
2930         if (status)
2931                 return status;
2932         /* Zero handle first to allow comparisons */
2933         memset(fh, 0, sizeof(*fh));
2934
2935         READ_BUF(4);
2936         READ32(len);
2937         if (len > NFS4_FHSIZE)
2938                 return -EIO;
2939         fh->size = len;
2940         READ_BUF(len);
2941         COPYMEM(fh->data, len);
2942         return 0;
2943 }
2944
2945 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2946 {
2947         int status;
2948
2949         status = decode_op_hdr(xdr, OP_LINK);
2950         if (status)
2951                 return status;
2952         return decode_change_info(xdr, cinfo);
2953 }
2954
2955 /*
2956  * We create the owner, so we know a proper owner.id length is 4.
2957  */
2958 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2959 {
2960         uint32_t *p;
2961         uint32_t namelen;
2962
2963         READ_BUF(32);
2964         READ64(denied->offset);
2965         READ64(denied->length);
2966         READ32(denied->type);
2967         READ64(denied->owner.clientid);
2968         READ32(namelen);
2969         READ_BUF(namelen);
2970         if (namelen == 4)
2971                 READ32(denied->owner.id);
2972         return -NFS4ERR_DENIED;
2973 }
2974
2975 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2976 {
2977         uint32_t *p;
2978         int status;
2979
2980         status = decode_op_hdr(xdr, OP_LOCK);
2981         if (status == 0) {
2982                 READ_BUF(sizeof(res->u.stateid.data));
2983                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
2984         } else if (status == -NFS4ERR_DENIED)
2985                 return decode_lock_denied(xdr, &res->u.denied);
2986         return status;
2987 }
2988
2989 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2990 {
2991         int status;
2992         status = decode_op_hdr(xdr, OP_LOCKT);
2993         if (status == -NFS4ERR_DENIED)
2994                 return decode_lock_denied(xdr, &res->u.denied);
2995         return status;
2996 }
2997
2998 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
2999 {
3000         uint32_t *p;
3001         int status;
3002
3003         status = decode_op_hdr(xdr, OP_LOCKU);
3004         if (status == 0) {
3005                 READ_BUF(sizeof(res->u.stateid.data));
3006                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
3007         }
3008         return status;
3009 }
3010
3011 static int decode_lookup(struct xdr_stream *xdr)
3012 {
3013         return decode_op_hdr(xdr, OP_LOOKUP);
3014 }
3015
3016 /* This is too sick! */
3017 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3018 {
3019         uint32_t *p;
3020         uint32_t limit_type, nblocks, blocksize;
3021
3022         READ_BUF(12);
3023         READ32(limit_type);
3024         switch (limit_type) {
3025                 case 1:
3026                         READ64(*maxsize);
3027                         break;
3028                 case 2:
3029                         READ32(nblocks);
3030                         READ32(blocksize);
3031                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3032         }
3033         return 0;
3034 }
3035
3036 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3037 {
3038         uint32_t *p;
3039         uint32_t delegation_type;
3040
3041         READ_BUF(4);
3042         READ32(delegation_type);
3043         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3044                 res->delegation_type = 0;
3045                 return 0;
3046         }
3047         READ_BUF(20);
3048         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3049         READ32(res->do_recall);
3050         switch (delegation_type) {
3051                 case NFS4_OPEN_DELEGATE_READ:
3052                         res->delegation_type = FMODE_READ;
3053                         break;
3054                 case NFS4_OPEN_DELEGATE_WRITE:
3055                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3056                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3057                                 return -EIO;
3058         }
3059         return decode_ace(xdr, NULL, res->server->nfs4_state);
3060 }
3061
3062 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3063 {
3064         uint32_t *p;
3065         uint32_t bmlen;
3066         int status;
3067
3068         status = decode_op_hdr(xdr, OP_OPEN);
3069         if (status)
3070                 return status;
3071         READ_BUF(sizeof(res->stateid.data));
3072         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3073
3074         decode_change_info(xdr, &res->cinfo);
3075
3076         READ_BUF(8);
3077         READ32(res->rflags);
3078         READ32(bmlen);
3079         if (bmlen > 10)
3080                 goto xdr_error;
3081
3082         READ_BUF(bmlen << 2);
3083         p += bmlen;
3084         return decode_delegation(xdr, res);
3085 xdr_error:
3086         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3087         return -EIO;
3088 }
3089
3090 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3091 {
3092         uint32_t *p;
3093         int status;
3094
3095         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3096         if (status)
3097                 return status;
3098         READ_BUF(sizeof(res->stateid.data));
3099         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3100         return 0;
3101 }
3102
3103 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3104 {
3105         uint32_t *p;
3106         int status;
3107
3108         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
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_putfh(struct xdr_stream *xdr)
3117 {
3118         return decode_op_hdr(xdr, OP_PUTFH);
3119 }
3120
3121 static int decode_putrootfh(struct xdr_stream *xdr)
3122 {
3123         return decode_op_hdr(xdr, OP_PUTROOTFH);
3124 }
3125
3126 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3127 {
3128         struct kvec *iov = req->rq_rcv_buf.head;
3129         uint32_t *p;
3130         uint32_t count, eof, recvd, hdrlen;
3131         int status;
3132
3133         status = decode_op_hdr(xdr, OP_READ);
3134         if (status)
3135                 return status;
3136         READ_BUF(8);
3137         READ32(eof);
3138         READ32(count);
3139         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3140         recvd = req->rq_rcv_buf.len - hdrlen;
3141         if (count > recvd) {
3142                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3143                                 "count %u > recvd %u\n", count, recvd);
3144                 count = recvd;
3145                 eof = 0;
3146         }
3147         xdr_read_pages(xdr, count);
3148         res->eof = eof;
3149         res->count = count;
3150         return 0;
3151 }
3152
3153 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3154 {
3155         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3156         struct page     *page = *rcvbuf->pages;
3157         struct kvec     *iov = rcvbuf->head;
3158         unsigned int    nr, pglen = rcvbuf->page_len;
3159         uint32_t        *end, *entry, *p, *kaddr;
3160         uint32_t        len, attrlen;
3161         int             hdrlen, recvd, status;
3162
3163         status = decode_op_hdr(xdr, OP_READDIR);
3164         if (status)
3165                 return status;
3166         READ_BUF(8);
3167         COPYMEM(readdir->verifier.data, 8);
3168         dprintk("%s: verifier = 0x%x%x\n",
3169                         __FUNCTION__,
3170                         ((u32 *)readdir->verifier.data)[0],
3171                         ((u32 *)readdir->verifier.data)[1]);
3172
3173
3174         hdrlen = (char *) p - (char *) iov->iov_base;
3175         recvd = rcvbuf->len - hdrlen;
3176         if (pglen > recvd)
3177                 pglen = recvd;
3178         xdr_read_pages(xdr, pglen);
3179
3180         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3181         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3182         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3183         entry = p;
3184         for (nr = 0; *p++; nr++) {
3185                 if (p + 3 > end)
3186                         goto short_pkt;
3187                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3188                 p += 2;                 /* cookie */
3189                 len = ntohl(*p++);      /* filename length */
3190                 if (len > NFS4_MAXNAMLEN) {
3191                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3192                         goto err_unmap;
3193                 }
3194                 dprintk("filename = %*s\n", len, (char *)p);
3195                 p += XDR_QUADLEN(len);
3196                 if (p + 1 > end)
3197                         goto short_pkt;
3198                 len = ntohl(*p++);      /* bitmap length */
3199                 p += len;
3200                 if (p + 1 > end)
3201                         goto short_pkt;
3202                 attrlen = XDR_QUADLEN(ntohl(*p++));
3203                 p += attrlen;           /* attributes */
3204                 if (p + 2 > end)
3205                         goto short_pkt;
3206                 entry = p;
3207         }
3208         if (!nr && (entry[0] != 0 || entry[1] == 0))
3209                 goto short_pkt;
3210 out:
3211         kunmap_atomic(kaddr, KM_USER0);
3212         return 0;
3213 short_pkt:
3214         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3215         entry[0] = entry[1] = 0;
3216         /* truncate listing ? */
3217         if (!nr) {
3218                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3219                 entry[1] = 1;
3220         }
3221         goto out;
3222 err_unmap:
3223         kunmap_atomic(kaddr, KM_USER0);
3224         return -errno_NFSERR_IO;
3225 }
3226
3227 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3228 {
3229         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3230         struct kvec *iov = rcvbuf->head;
3231         int hdrlen, len, recvd;
3232         uint32_t *p;
3233         char *kaddr;
3234         int status;
3235
3236         status = decode_op_hdr(xdr, OP_READLINK);
3237         if (status)
3238                 return status;
3239
3240         /* Convert length of symlink */
3241         READ_BUF(4);
3242         READ32(len);
3243         if (len >= rcvbuf->page_len || len <= 0) {
3244                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3245                 return -ENAMETOOLONG;
3246         }
3247         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3248         recvd = req->rq_rcv_buf.len - hdrlen;
3249         if (recvd < len) {
3250                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3251                                 "count %u > recvd %u\n", len, recvd);
3252                 return -EIO;
3253         }
3254         xdr_read_pages(xdr, len);
3255         /*
3256          * The XDR encode routine has set things up so that
3257          * the link text will be copied directly into the
3258          * buffer.  We just have to do overflow-checking,
3259          * and and null-terminate the text (the VFS expects
3260          * null-termination).
3261          */
3262         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3263         kaddr[len+rcvbuf->page_base] = '\0';
3264         kunmap_atomic(kaddr, KM_USER0);
3265         return 0;
3266 }
3267
3268 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3269 {
3270         int status;
3271
3272         status = decode_op_hdr(xdr, OP_REMOVE);
3273         if (status)
3274                 goto out;
3275         status = decode_change_info(xdr, cinfo);
3276 out:
3277         return status;
3278 }
3279
3280 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3281               struct nfs4_change_info *new_cinfo)
3282 {
3283         int status;
3284
3285         status = decode_op_hdr(xdr, OP_RENAME);
3286         if (status)
3287                 goto out;
3288         if ((status = decode_change_info(xdr, old_cinfo)))
3289                 goto out;
3290         status = decode_change_info(xdr, new_cinfo);
3291 out:
3292         return status;
3293 }
3294
3295 static int decode_renew(struct xdr_stream *xdr)
3296 {
3297         return decode_op_hdr(xdr, OP_RENEW);
3298 }
3299
3300 static int
3301 decode_restorefh(struct xdr_stream *xdr)
3302 {
3303         return decode_op_hdr(xdr, OP_RESTOREFH);
3304 }
3305
3306 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3307                 size_t *acl_len)
3308 {
3309         uint32_t *savep;
3310         uint32_t attrlen,
3311                  bitmap[2] = {0};
3312         struct kvec *iov = req->rq_rcv_buf.head;
3313         int status;
3314
3315         *acl_len = 0;
3316         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3317                 goto out;
3318         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3319                 goto out;
3320         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3321                 goto out;
3322
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3326                 int hdrlen, recvd;
3327
3328                 /* We ignore &savep and don't do consistency checks on
3329                  * the attr length.  Let userspace figure it out.... */
3330                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3331                 recvd = req->rq_rcv_buf.len - hdrlen;
3332                 if (attrlen > recvd) {
3333                         printk(KERN_WARNING "NFS: server cheating in getattr"
3334                                         " acl reply: attrlen %u > recvd %u\n",
3335                                         attrlen, recvd);
3336                         return -EINVAL;
3337                 }
3338                 if (attrlen <= *acl_len)
3339                         xdr_read_pages(xdr, attrlen);
3340                 *acl_len = attrlen;
3341         } else
3342                 status = -EOPNOTSUPP;
3343
3344 out:
3345         return status;
3346 }
3347
3348 static int
3349 decode_savefh(struct xdr_stream *xdr)
3350 {
3351         return decode_op_hdr(xdr, OP_SAVEFH);
3352 }
3353
3354 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3355 {
3356         uint32_t *p;
3357         uint32_t bmlen;
3358         int status;
3359
3360
3361         status = decode_op_hdr(xdr, OP_SETATTR);
3362         if (status)
3363                 return status;
3364         READ_BUF(4);
3365         READ32(bmlen);
3366         READ_BUF(bmlen << 2);
3367         return 0;
3368 }
3369
3370 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3371 {
3372         uint32_t *p;
3373         uint32_t opnum;
3374         int32_t nfserr;
3375
3376         READ_BUF(8);
3377         READ32(opnum);
3378         if (opnum != OP_SETCLIENTID) {
3379                 printk(KERN_NOTICE
3380                                 "nfs4_decode_setclientid: Server returned operation"
3381                                 " %d\n", opnum);
3382                 return -EIO;
3383         }
3384         READ32(nfserr);
3385         if (nfserr == NFS_OK) {
3386                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3387                 READ64(clp->cl_clientid);
3388                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3389         } else if (nfserr == NFSERR_CLID_INUSE) {
3390                 uint32_t len;
3391
3392                 /* skip netid string */
3393                 READ_BUF(4);
3394                 READ32(len);
3395                 READ_BUF(len);
3396
3397                 /* skip uaddr string */
3398                 READ_BUF(4);
3399                 READ32(len);
3400                 READ_BUF(len);
3401                 return -NFSERR_CLID_INUSE;
3402         } else
3403                 return -nfs_stat_to_errno(nfserr);
3404
3405         return 0;
3406 }
3407
3408 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3409 {
3410         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3411 }
3412
3413 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3414 {
3415         uint32_t *p;
3416         int status;
3417
3418         status = decode_op_hdr(xdr, OP_WRITE);
3419         if (status)
3420                 return status;
3421
3422         READ_BUF(16);
3423         READ32(res->count);
3424         READ32(res->verf->committed);
3425         COPYMEM(res->verf->verifier, 8);
3426         return 0;
3427 }
3428
3429 static int decode_delegreturn(struct xdr_stream *xdr)
3430 {
3431         return decode_op_hdr(xdr, OP_DELEGRETURN);
3432 }
3433
3434 /*
3435  * Decode OPEN_DOWNGRADE response
3436  */
3437 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3438 {
3439         struct xdr_stream xdr;
3440         struct compound_hdr hdr;
3441         int status;
3442
3443         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3444         status = decode_compound_hdr(&xdr, &hdr);
3445         if (status)
3446                 goto out;
3447         status = decode_putfh(&xdr);
3448         if (status)
3449                 goto out;
3450         status = decode_open_downgrade(&xdr, res);
3451         if (status != 0)
3452                 goto out;
3453         decode_getfattr(&xdr, res->fattr, res->server);
3454 out:
3455         return status;
3456 }
3457
3458 /*
3459  * END OF "GENERIC" DECODE ROUTINES.
3460  */
3461
3462 /*
3463  * Decode ACCESS response
3464  */
3465 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3466 {
3467         struct xdr_stream xdr;
3468         struct compound_hdr hdr;
3469         int status;
3470
3471         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3472         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3473                 goto out;
3474         if ((status = decode_putfh(&xdr)) == 0)
3475                 status = decode_access(&xdr, res);
3476 out:
3477         return status;
3478 }
3479
3480 /*
3481  * Decode LOOKUP response
3482  */
3483 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3484 {
3485         struct xdr_stream xdr;
3486         struct compound_hdr hdr;
3487         int status;
3488
3489         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3490         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3491                 goto out;
3492         if ((status = decode_putfh(&xdr)) != 0)
3493                 goto out;
3494         if ((status = decode_lookup(&xdr)) != 0)
3495                 goto out;
3496         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3497                 goto out;
3498         status = decode_getfattr(&xdr, res->fattr, res->server);
3499 out:
3500         return status;
3501 }
3502
3503 /*
3504  * Decode LOOKUP_ROOT response
3505  */
3506 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3507 {
3508         struct xdr_stream xdr;
3509         struct compound_hdr hdr;
3510         int status;
3511
3512         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3513         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3514                 goto out;
3515         if ((status = decode_putrootfh(&xdr)) != 0)
3516                 goto out;
3517         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3518                 status = decode_getfattr(&xdr, res->fattr, res->server);
3519 out:
3520         return status;
3521 }
3522
3523 /*
3524  * Decode REMOVE response
3525  */
3526 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3527 {
3528         struct xdr_stream xdr;
3529         struct compound_hdr hdr;
3530         int status;
3531
3532         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3533         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3534                 goto out;
3535         if ((status = decode_putfh(&xdr)) != 0)
3536                 goto out;
3537         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3538                 goto out;
3539         decode_getfattr(&xdr, res->dir_attr, res->server);
3540 out:
3541         return status;
3542 }
3543
3544 /*
3545  * Decode RENAME response
3546  */
3547 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3548 {
3549         struct xdr_stream xdr;
3550         struct compound_hdr hdr;
3551         int status;
3552
3553         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3554         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3555                 goto out;
3556         if ((status = decode_putfh(&xdr)) != 0)
3557                 goto out;
3558         if ((status = decode_savefh(&xdr)) != 0)
3559                 goto out;
3560         if ((status = decode_putfh(&xdr)) != 0)
3561                 goto out;
3562         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3563                 goto out;
3564         /* Current FH is target directory */
3565         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3566                 goto out;
3567         if ((status = decode_restorefh(&xdr)) != 0)
3568                 goto out;
3569         decode_getfattr(&xdr, res->old_fattr, res->server);
3570 out:
3571         return status;
3572 }
3573
3574 /*
3575  * Decode LINK response
3576  */
3577 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3578 {
3579         struct xdr_stream xdr;
3580         struct compound_hdr hdr;
3581         int status;
3582
3583         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3584         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3585                 goto out;
3586         if ((status = decode_putfh(&xdr)) != 0)
3587                 goto out;
3588         if ((status = decode_savefh(&xdr)) != 0)
3589                 goto out;
3590         if ((status = decode_putfh(&xdr)) != 0)
3591                 goto out;
3592         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3593                 goto out;
3594         /*
3595          * Note order: OP_LINK leaves the directory as the current
3596          *             filehandle.
3597          */
3598         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3599                 goto out;
3600         if ((status = decode_restorefh(&xdr)) != 0)
3601                 goto out;
3602         decode_getfattr(&xdr, res->fattr, res->server);
3603 out:
3604         return status;
3605 }
3606
3607 /*
3608  * Decode CREATE response
3609  */
3610 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3611 {
3612         struct xdr_stream xdr;
3613         struct compound_hdr hdr;
3614         int status;
3615
3616         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3617         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3618                 goto out;
3619         if ((status = decode_putfh(&xdr)) != 0)
3620                 goto out;
3621         if ((status = decode_savefh(&xdr)) != 0)
3622                 goto out;
3623         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3624                 goto out;
3625         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3626                 goto out;
3627         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3628                 goto out;
3629         if ((status = decode_restorefh(&xdr)) != 0)
3630                 goto out;
3631         decode_getfattr(&xdr, res->dir_fattr, res->server);
3632 out:
3633         return status;
3634 }
3635
3636 /*
3637  * Decode SYMLINK response
3638  */
3639 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3640 {
3641         return nfs4_xdr_dec_create(rqstp, p, res);
3642 }
3643
3644 /*
3645  * Decode GETATTR response
3646  */
3647 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3648 {
3649         struct xdr_stream xdr;
3650         struct compound_hdr hdr;
3651         int status;
3652
3653         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3654         status = decode_compound_hdr(&xdr, &hdr);
3655         if (status)
3656                 goto out;
3657         status = decode_putfh(&xdr);
3658         if (status)
3659                 goto out;
3660         status = decode_getfattr(&xdr, res->fattr, res->server);
3661 out:
3662         return status;
3663
3664 }
3665
3666 /*
3667  * Encode an SETACL request
3668  */
3669 static int
3670 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3671 {
3672         struct xdr_stream xdr;
3673         struct compound_hdr hdr = {
3674                 .nops   = 2,
3675         };
3676         int status;
3677
3678         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3679         encode_compound_hdr(&xdr, &hdr);
3680         status = encode_putfh(&xdr, args->fh);
3681         if (status)
3682                 goto out;
3683         status = encode_setacl(&xdr, args);
3684 out:
3685         return status;
3686 }
3687 /*
3688  * Decode SETACL response
3689  */
3690 static int
3691 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3692 {
3693         struct xdr_stream xdr;
3694         struct compound_hdr hdr;
3695         int status;
3696
3697         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3698         status = decode_compound_hdr(&xdr, &hdr);
3699         if (status)
3700                 goto out;
3701         status = decode_putfh(&xdr);
3702         if (status)
3703                 goto out;
3704         status = decode_setattr(&xdr, res);
3705 out:
3706         return status;
3707 }
3708
3709 /*
3710  * Decode GETACL response
3711  */
3712 static int
3713 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3714 {
3715         struct xdr_stream xdr;
3716         struct compound_hdr hdr;
3717         int status;
3718
3719         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3720         status = decode_compound_hdr(&xdr, &hdr);
3721         if (status)
3722                 goto out;
3723         status = decode_putfh(&xdr);
3724         if (status)
3725                 goto out;
3726         status = decode_getacl(&xdr, rqstp, acl_len);
3727
3728 out:
3729         return status;
3730 }
3731
3732 /*
3733  * Decode CLOSE response
3734  */
3735 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3736 {
3737         struct xdr_stream xdr;
3738         struct compound_hdr hdr;
3739         int status;
3740
3741         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3742         status = decode_compound_hdr(&xdr, &hdr);
3743         if (status)
3744                 goto out;
3745         status = decode_putfh(&xdr);
3746         if (status)
3747                 goto out;
3748         status = decode_close(&xdr, res);
3749         if (status != 0)
3750                 goto out;
3751         /*
3752          * Note: Server may do delete on close for this file
3753          *      in which case the getattr call will fail with
3754          *      an ESTALE error. Shouldn't be a problem,
3755          *      though, since fattr->valid will remain unset.
3756          */
3757         decode_getfattr(&xdr, res->fattr, res->server);
3758 out:
3759         return status;
3760 }
3761
3762 /*
3763  * Decode OPEN response
3764  */
3765 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3766 {
3767         struct xdr_stream xdr;
3768         struct compound_hdr hdr;
3769         int status;
3770
3771         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3772         status = decode_compound_hdr(&xdr, &hdr);
3773         if (status)
3774                 goto out;
3775         status = decode_putfh(&xdr);
3776         if (status)
3777                 goto out;
3778         status = decode_savefh(&xdr);
3779         if (status)
3780                 goto out;
3781         status = decode_open(&xdr, res);
3782         if (status)
3783                 goto out;
3784         status = decode_getfh(&xdr, &res->fh);
3785         if (status)
3786                 goto out;
3787         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3788                 goto out;
3789         if ((status = decode_restorefh(&xdr)) != 0)
3790                 goto out;
3791         decode_getfattr(&xdr, res->dir_attr, res->server);
3792 out:
3793         return status;
3794 }
3795
3796 /*
3797  * Decode OPEN_CONFIRM response
3798  */
3799 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3800 {
3801         struct xdr_stream xdr;
3802         struct compound_hdr hdr;
3803         int status;
3804
3805         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3806         status = decode_compound_hdr(&xdr, &hdr);
3807         if (status)
3808                 goto out;
3809         status = decode_putfh(&xdr);
3810         if (status)
3811                 goto out;
3812         status = decode_open_confirm(&xdr, res);
3813 out:
3814         return status;
3815 }
3816
3817 /*
3818  * Decode OPEN response
3819  */
3820 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3821 {
3822         struct xdr_stream xdr;
3823         struct compound_hdr hdr;
3824         int status;
3825
3826         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3827         status = decode_compound_hdr(&xdr, &hdr);
3828         if (status)
3829                 goto out;
3830         status = decode_putfh(&xdr);
3831         if (status)
3832                 goto out;
3833         status = decode_open(&xdr, res);
3834 out:
3835         return status;
3836 }
3837
3838 /*
3839  * Decode SETATTR response
3840  */
3841 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3842 {
3843         struct xdr_stream xdr;
3844         struct compound_hdr hdr;
3845         int status;
3846
3847         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3848         status = decode_compound_hdr(&xdr, &hdr);
3849         if (status)
3850                 goto out;
3851         status = decode_putfh(&xdr);
3852         if (status)
3853                 goto out;
3854         status = decode_setattr(&xdr, res);
3855         if (status)
3856                 goto out;
3857         status = decode_getfattr(&xdr, res->fattr, res->server);
3858         if (status == NFS4ERR_DELAY)
3859                 status = 0;
3860 out:
3861         return status;
3862 }
3863
3864 /*
3865  * Decode LOCK response
3866  */
3867 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3868 {
3869         struct xdr_stream xdr;
3870         struct compound_hdr hdr;
3871         int status;
3872
3873         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3874         status = decode_compound_hdr(&xdr, &hdr);
3875         if (status)
3876                 goto out;
3877         status = decode_putfh(&xdr);
3878         if (status)
3879                 goto out;
3880         status = decode_lock(&xdr, res);
3881 out:
3882         return status;
3883 }
3884
3885 /*
3886  * Decode LOCKT response
3887  */
3888 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3889 {
3890         struct xdr_stream xdr;
3891         struct compound_hdr hdr;
3892         int status;
3893
3894         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3895         status = decode_compound_hdr(&xdr, &hdr);
3896         if (status)
3897                 goto out;
3898         status = decode_putfh(&xdr);
3899         if (status)
3900                 goto out;
3901         status = decode_lockt(&xdr, res);
3902 out:
3903         return status;
3904 }
3905
3906 /*
3907  * Decode LOCKU response
3908  */
3909 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3910 {
3911         struct xdr_stream xdr;
3912         struct compound_hdr hdr;
3913         int status;
3914
3915         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3916         status = decode_compound_hdr(&xdr, &hdr);
3917         if (status)
3918                 goto out;
3919         status = decode_putfh(&xdr);
3920         if (status)
3921                 goto out;
3922         status = decode_locku(&xdr, res);
3923 out:
3924         return status;
3925 }
3926
3927 /*
3928  * Decode READLINK response
3929  */
3930 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3931 {
3932         struct xdr_stream xdr;
3933         struct compound_hdr hdr;
3934         int status;
3935
3936         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3937         status = decode_compound_hdr(&xdr, &hdr);
3938         if (status)
3939                 goto out;
3940         status = decode_putfh(&xdr);
3941         if (status)
3942                 goto out;
3943         status = decode_readlink(&xdr, rqstp);
3944 out:
3945         return status;
3946 }
3947
3948 /*
3949  * Decode READDIR response
3950  */
3951 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3952 {
3953         struct xdr_stream xdr;
3954         struct compound_hdr hdr;
3955         int status;
3956
3957         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3958         status = decode_compound_hdr(&xdr, &hdr);
3959         if (status)
3960                 goto out;
3961         status = decode_putfh(&xdr);
3962         if (status)
3963                 goto out;
3964         status = decode_readdir(&xdr, rqstp, res);
3965 out:
3966         return status;
3967 }
3968
3969 /*
3970  * Decode Read response
3971  */
3972 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3973 {
3974         struct xdr_stream xdr;
3975         struct compound_hdr hdr;
3976         int status;
3977
3978         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3979         status = decode_compound_hdr(&xdr, &hdr);
3980         if (status)
3981                 goto out;
3982         status = decode_putfh(&xdr);
3983         if (status)
3984                 goto out;
3985         status = decode_read(&xdr, rqstp, res);
3986         if (!status)
3987                 status = res->count;
3988 out:
3989         return status;
3990 }
3991
3992 /*
3993  * Decode WRITE response
3994  */
3995 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
3996 {
3997         struct xdr_stream xdr;
3998         struct compound_hdr hdr;
3999         int status;
4000
4001         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4002         status = decode_compound_hdr(&xdr, &hdr);
4003         if (status)
4004                 goto out;
4005         status = decode_putfh(&xdr);
4006         if (status)
4007                 goto out;
4008         status = decode_write(&xdr, res);
4009         if (status)
4010                 goto out;
4011         decode_getfattr(&xdr, res->fattr, res->server);
4012         if (!status)
4013                 status = res->count;
4014 out:
4015         return status;
4016 }
4017
4018 /*
4019  * Decode COMMIT response
4020  */
4021 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4022 {
4023         struct xdr_stream xdr;
4024         struct compound_hdr hdr;
4025         int status;
4026
4027         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4028         status = decode_compound_hdr(&xdr, &hdr);
4029         if (status)
4030                 goto out;
4031         status = decode_putfh(&xdr);
4032         if (status)
4033                 goto out;
4034         status = decode_commit(&xdr, res);
4035         if (status)
4036                 goto out;
4037         decode_getfattr(&xdr, res->fattr, res->server);
4038 out:
4039         return status;
4040 }
4041
4042 /*
4043  * FSINFO request
4044  */
4045 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4046 {
4047         struct xdr_stream xdr;
4048         struct compound_hdr hdr;
4049         int status;
4050
4051         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4052         status = decode_compound_hdr(&xdr, &hdr);
4053         if (!status)
4054                 status = decode_putfh(&xdr);
4055         if (!status)
4056                 status = decode_fsinfo(&xdr, fsinfo);
4057         if (!status)
4058                 status = -nfs_stat_to_errno(hdr.status);
4059         return status;
4060 }
4061
4062 /*
4063  * PATHCONF request
4064  */
4065 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4066 {
4067         struct xdr_stream xdr;
4068         struct compound_hdr hdr;
4069         int status;
4070
4071         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4072         status = decode_compound_hdr(&xdr, &hdr);
4073         if (!status)
4074                 status = decode_putfh(&xdr);
4075         if (!status)
4076                 status = decode_pathconf(&xdr, pathconf);
4077         return status;
4078 }
4079
4080 /*
4081  * STATFS request
4082  */
4083 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4084 {
4085         struct xdr_stream xdr;
4086         struct compound_hdr hdr;
4087         int status;
4088
4089         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4090         status = decode_compound_hdr(&xdr, &hdr);
4091         if (!status)
4092                 status = decode_putfh(&xdr);
4093         if (!status)
4094                 status = decode_statfs(&xdr, fsstat);
4095         return status;
4096 }
4097
4098 /*
4099  * GETATTR_BITMAP request
4100  */
4101 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4102 {
4103         struct xdr_stream xdr;
4104         struct compound_hdr hdr;
4105         int status;
4106
4107         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4108         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4109                 goto out;
4110         if ((status = decode_putfh(&xdr)) != 0)
4111                 goto out;
4112         status = decode_server_caps(&xdr, res);
4113 out:
4114         return status;
4115 }
4116
4117 /*
4118  * Decode RENEW response
4119  */
4120 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4121 {
4122         struct xdr_stream xdr;
4123         struct compound_hdr hdr;
4124         int status;
4125
4126         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4127         status = decode_compound_hdr(&xdr, &hdr);
4128         if (!status)
4129                 status = decode_renew(&xdr);
4130         return status;
4131 }
4132
4133 /*
4134  * a SETCLIENTID request
4135  */
4136 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4137                 struct nfs4_client *clp)
4138 {
4139         struct xdr_stream xdr;
4140         struct compound_hdr hdr;
4141         int status;
4142
4143         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4144         status = decode_compound_hdr(&xdr, &hdr);
4145         if (!status)
4146                 status = decode_setclientid(&xdr, clp);
4147         if (!status)
4148                 status = -nfs_stat_to_errno(hdr.status);
4149         return status;
4150 }
4151
4152 /*
4153  * a SETCLIENTID_CONFIRM request
4154  */
4155 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4156 {
4157         struct xdr_stream xdr;
4158         struct compound_hdr hdr;
4159         int status;
4160
4161         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4162         status = decode_compound_hdr(&xdr, &hdr);
4163         if (!status)
4164                 status = decode_setclientid_confirm(&xdr);
4165         if (!status)
4166                 status = decode_putrootfh(&xdr);
4167         if (!status)
4168                 status = decode_fsinfo(&xdr, fsinfo);
4169         if (!status)
4170                 status = -nfs_stat_to_errno(hdr.status);
4171         return status;
4172 }
4173
4174 /*
4175  * DELEGRETURN request
4176  */
4177 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4178 {
4179         struct xdr_stream xdr;
4180         struct compound_hdr hdr;
4181         int status;
4182
4183         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4184         status = decode_compound_hdr(&xdr, &hdr);
4185         if (status == 0) {
4186                 status = decode_putfh(&xdr);
4187                 if (status == 0)
4188                         status = decode_delegreturn(&xdr);
4189         }
4190         return status;
4191 }
4192
4193 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4194 {
4195         uint32_t bitmap[2] = {0};
4196         uint32_t len;
4197
4198         if (!*p++) {
4199                 if (!*p)
4200                         return ERR_PTR(-EAGAIN);
4201                 entry->eof = 1;
4202                 return ERR_PTR(-EBADCOOKIE);
4203         }
4204
4205         entry->prev_cookie = entry->cookie;
4206         p = xdr_decode_hyper(p, &entry->cookie);
4207         entry->len = ntohl(*p++);
4208         entry->name = (const char *) p;
4209         p += XDR_QUADLEN(entry->len);
4210
4211         /*
4212          * In case the server doesn't return an inode number,
4213          * we fake one here.  (We don't use inode number 0,
4214          * since glibc seems to choke on it...)
4215          */
4216         entry->ino = 1;
4217
4218         len = ntohl(*p++);              /* bitmap length */
4219         if (len-- > 0) {
4220                 bitmap[0] = ntohl(*p++);
4221                 if (len-- > 0) {
4222                         bitmap[1] = ntohl(*p++);
4223                         p += len;
4224                 }
4225         }
4226         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4227         if (len > 0) {
4228                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4229                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4230                         /* Ignore the return value of rdattr_error for now */
4231                         p++;
4232                         len--;
4233                 }
4234                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4235                         xdr_decode_hyper(p, &entry->ino);
4236                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4237                         xdr_decode_hyper(p, &entry->ino);
4238                 p += len;
4239         }
4240
4241         entry->eof = !p[0] && p[1];
4242         return p;
4243 }
4244
4245 /*
4246  * We need to translate between nfs status return values and
4247  * the local errno values which may not be the same.
4248  */
4249 static struct {
4250         int stat;
4251         int errno;
4252 } nfs_errtbl[] = {
4253         { NFS4_OK,              0               },
4254         { NFS4ERR_PERM,         EPERM           },
4255         { NFS4ERR_NOENT,        ENOENT          },
4256         { NFS4ERR_IO,           errno_NFSERR_IO },
4257         { NFS4ERR_NXIO,         ENXIO           },
4258         { NFS4ERR_ACCESS,       EACCES          },
4259         { NFS4ERR_EXIST,        EEXIST          },
4260         { NFS4ERR_XDEV,         EXDEV           },
4261         { NFS4ERR_NOTDIR,       ENOTDIR         },
4262         { NFS4ERR_ISDIR,        EISDIR          },
4263         { NFS4ERR_INVAL,        EINVAL          },
4264         { NFS4ERR_FBIG,         EFBIG           },
4265         { NFS4ERR_NOSPC,        ENOSPC          },
4266         { NFS4ERR_ROFS,         EROFS           },
4267         { NFS4ERR_MLINK,        EMLINK          },
4268         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4269         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4270         { NFS4ERR_DQUOT,        EDQUOT          },
4271         { NFS4ERR_STALE,        ESTALE          },
4272         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4273         { NFS4ERR_BADOWNER,     EINVAL          },
4274         { NFS4ERR_BADNAME,      EINVAL          },
4275         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4276         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4277         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4278         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4279         { NFS4ERR_BADTYPE,      EBADTYPE        },
4280         { NFS4ERR_LOCKED,       EAGAIN          },
4281         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4282         { NFS4ERR_SYMLINK,      ELOOP           },
4283         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4284         { NFS4ERR_DEADLOCK,     EDEADLK         },
4285         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4286                                                     * to be handled by a
4287                                                     * middle-layer.
4288                                                     */
4289         { -1,                   EIO             }
4290 };
4291
4292 /*
4293  * Convert an NFS error code to a local one.
4294  * This one is used jointly by NFSv2 and NFSv3.
4295  */
4296 static int
4297 nfs_stat_to_errno(int stat)
4298 {
4299         int i;
4300         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4301                 if (nfs_errtbl[i].stat == stat)
4302                         return nfs_errtbl[i].errno;
4303         }
4304         if (stat <= 10000 || stat > 10100) {
4305                 /* The server is looney tunes. */
4306                 return ESERVERFAULT;
4307         }
4308         /* If we cannot translate the error, the recovery routines should
4309          * handle it.
4310          * Note: remaining NFSv4 error codes have values > 10000, so should
4311          * not conflict with native Linux error codes.
4312          */
4313         return stat;
4314 }
4315
4316 #ifndef MAX
4317 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4318 #endif
4319
4320 #define PROC(proc, argtype, restype)                            \
4321 [NFSPROC4_CLNT_##proc] = {                                      \
4322         .p_proc   = NFSPROC4_COMPOUND,                          \
4323         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4324         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4325         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4326     }
4327
4328 struct rpc_procinfo     nfs4_procedures[] = {
4329   PROC(READ,            enc_read,       dec_read),
4330   PROC(WRITE,           enc_write,      dec_write),
4331   PROC(COMMIT,          enc_commit,     dec_commit),
4332   PROC(OPEN,            enc_open,       dec_open),
4333   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4334   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4335   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4336   PROC(CLOSE,           enc_close,      dec_close),
4337   PROC(SETATTR,         enc_setattr,    dec_setattr),
4338   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4339   PROC(RENEW,           enc_renew,      dec_renew),
4340   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4341   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4342   PROC(LOCK,            enc_lock,       dec_lock),
4343   PROC(LOCKT,           enc_lockt,      dec_lockt),
4344   PROC(LOCKU,           enc_locku,      dec_locku),
4345   PROC(ACCESS,          enc_access,     dec_access),
4346   PROC(GETATTR,         enc_getattr,    dec_getattr),
4347   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4348   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4349   PROC(REMOVE,          enc_remove,     dec_remove),
4350   PROC(RENAME,          enc_rename,     dec_rename),
4351   PROC(LINK,            enc_link,       dec_link),
4352   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4353   PROC(CREATE,          enc_create,     dec_create),
4354   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4355   PROC(STATFS,          enc_statfs,     dec_statfs),
4356   PROC(READLINK,        enc_readlink,   dec_readlink),
4357   PROC(READDIR,         enc_readdir,    dec_readdir),
4358   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4359   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4360   PROC(GETACL,          enc_getacl,     dec_getacl),
4361   PROC(SETACL,          enc_setacl,     dec_setacl),
4362 };
4363
4364 struct rpc_version              nfs_version4 = {
4365         .number                 = 4,
4366         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4367         .procs                  = nfs4_procedures
4368 };
4369
4370 /*
4371  * Local variables:
4372  *  c-basic-offset: 8
4373  * End:
4374  */