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         if (status != 0)
2770                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2771         return status;
2772 }
2773
2774 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2775 {
2776         uint32_t *savep;
2777         uint32_t attrlen,
2778                  bitmap[2] = {0};
2779         int status;
2780
2781         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2782                 goto xdr_error;
2783         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2784                 goto xdr_error;
2785         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2786                 goto xdr_error;
2787
2788         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2789                 goto xdr_error;
2790         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2791                 goto xdr_error;
2792         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2793                 goto xdr_error;
2794         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2795                 goto xdr_error;
2796         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2797                 goto xdr_error;
2798         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2799                 goto xdr_error;
2800
2801         status = verify_attr_len(xdr, savep, attrlen);
2802 xdr_error:
2803         if (status != 0)
2804                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2805         return status;
2806 }
2807
2808 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2809 {
2810         uint32_t *savep;
2811         uint32_t attrlen,
2812                  bitmap[2] = {0};
2813         int status;
2814
2815         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2816                 goto xdr_error;
2817         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2818                 goto xdr_error;
2819         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2820                 goto xdr_error;
2821
2822         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2823                 goto xdr_error;
2824         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2825                 goto xdr_error;
2826
2827         status = verify_attr_len(xdr, savep, attrlen);
2828 xdr_error:
2829         if (status != 0)
2830                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2831         return status;
2832 }
2833
2834 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2835 {
2836         uint32_t *savep;
2837         uint32_t attrlen,
2838                  bitmap[2] = {0},
2839                  type;
2840         int status, fmode = 0;
2841
2842         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2843                 goto xdr_error;
2844         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2845                 goto xdr_error;
2846
2847         fattr->bitmap[0] = bitmap[0];
2848         fattr->bitmap[1] = bitmap[1];
2849
2850         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2851                 goto xdr_error;
2852
2853
2854         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2855                 goto xdr_error;
2856         fattr->type = nfs_type2fmt[type].nfs2type;
2857         fmode = nfs_type2fmt[type].mode;
2858
2859         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2860                 goto xdr_error;
2861         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2862                 goto xdr_error;
2863         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2864                 goto xdr_error;
2865         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2866                 goto xdr_error;
2867         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2868                 goto xdr_error;
2869         fattr->mode |= fmode;
2870         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2871                 goto xdr_error;
2872         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2873                 goto xdr_error;
2874         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2875                 goto xdr_error;
2876         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2877                 goto xdr_error;
2878         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2879                 goto xdr_error;
2880         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2881                 goto xdr_error;
2882         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2883                 goto xdr_error;
2884         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2885                 goto xdr_error;
2886         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2887                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2888 xdr_error:
2889         if (status != 0)
2890                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2891         return status;
2892 }
2893
2894
2895 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2896 {
2897         uint32_t *savep;
2898         uint32_t attrlen, bitmap[2];
2899         int status;
2900
2901         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2902                 goto xdr_error;
2903         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2904                 goto xdr_error;
2905         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2906                 goto xdr_error;
2907
2908         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2909
2910         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2911                 goto xdr_error;
2912         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2913                 goto xdr_error;
2914         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2915                 goto xdr_error;
2916         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2917         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2918                 goto xdr_error;
2919         fsinfo->wtpref = fsinfo->wtmax;
2920
2921         status = verify_attr_len(xdr, savep, attrlen);
2922 xdr_error:
2923         if (status != 0)
2924                 printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status);
2925         return status;
2926 }
2927
2928 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2929 {
2930         uint32_t *p;
2931         uint32_t len;
2932         int status;
2933
2934         status = decode_op_hdr(xdr, OP_GETFH);
2935         if (status)
2936                 return status;
2937         /* Zero handle first to allow comparisons */
2938         memset(fh, 0, sizeof(*fh));
2939
2940         READ_BUF(4);
2941         READ32(len);
2942         if (len > NFS4_FHSIZE)
2943                 return -EIO;
2944         fh->size = len;
2945         READ_BUF(len);
2946         COPYMEM(fh->data, len);
2947         return 0;
2948 }
2949
2950 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2951 {
2952         int status;
2953
2954         status = decode_op_hdr(xdr, OP_LINK);
2955         if (status)
2956                 return status;
2957         return decode_change_info(xdr, cinfo);
2958 }
2959
2960 /*
2961  * We create the owner, so we know a proper owner.id length is 4.
2962  */
2963 static int decode_lock_denied (struct xdr_stream *xdr, struct nfs_lock_denied *denied)
2964 {
2965         uint32_t *p;
2966         uint32_t namelen;
2967
2968         READ_BUF(32);
2969         READ64(denied->offset);
2970         READ64(denied->length);
2971         READ32(denied->type);
2972         READ64(denied->owner.clientid);
2973         READ32(namelen);
2974         READ_BUF(namelen);
2975         if (namelen == 4)
2976                 READ32(denied->owner.id);
2977         return -NFS4ERR_DENIED;
2978 }
2979
2980 static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res)
2981 {
2982         uint32_t *p;
2983         int status;
2984
2985         status = decode_op_hdr(xdr, OP_LOCK);
2986         if (status == 0) {
2987                 READ_BUF(sizeof(res->u.stateid.data));
2988                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
2989         } else if (status == -NFS4ERR_DENIED)
2990                 return decode_lock_denied(xdr, &res->u.denied);
2991         return status;
2992 }
2993
2994 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockres *res)
2995 {
2996         int status;
2997         status = decode_op_hdr(xdr, OP_LOCKT);
2998         if (status == -NFS4ERR_DENIED)
2999                 return decode_lock_denied(xdr, &res->u.denied);
3000         return status;
3001 }
3002
3003 static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res)
3004 {
3005         uint32_t *p;
3006         int status;
3007
3008         status = decode_op_hdr(xdr, OP_LOCKU);
3009         if (status == 0) {
3010                 READ_BUF(sizeof(res->u.stateid.data));
3011                 COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data));
3012         }
3013         return status;
3014 }
3015
3016 static int decode_lookup(struct xdr_stream *xdr)
3017 {
3018         return decode_op_hdr(xdr, OP_LOOKUP);
3019 }
3020
3021 /* This is too sick! */
3022 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3023 {
3024         uint32_t *p;
3025         uint32_t limit_type, nblocks, blocksize;
3026
3027         READ_BUF(12);
3028         READ32(limit_type);
3029         switch (limit_type) {
3030                 case 1:
3031                         READ64(*maxsize);
3032                         break;
3033                 case 2:
3034                         READ32(nblocks);
3035                         READ32(blocksize);
3036                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3037         }
3038         return 0;
3039 }
3040
3041 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3042 {
3043         uint32_t *p;
3044         uint32_t delegation_type;
3045
3046         READ_BUF(4);
3047         READ32(delegation_type);
3048         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3049                 res->delegation_type = 0;
3050                 return 0;
3051         }
3052         READ_BUF(20);
3053         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3054         READ32(res->do_recall);
3055         switch (delegation_type) {
3056                 case NFS4_OPEN_DELEGATE_READ:
3057                         res->delegation_type = FMODE_READ;
3058                         break;
3059                 case NFS4_OPEN_DELEGATE_WRITE:
3060                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3061                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3062                                 return -EIO;
3063         }
3064         return decode_ace(xdr, NULL, res->server->nfs4_state);
3065 }
3066
3067 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3068 {
3069         uint32_t *p;
3070         uint32_t bmlen;
3071         int status;
3072
3073         status = decode_op_hdr(xdr, OP_OPEN);
3074         if (status)
3075                 return status;
3076         READ_BUF(sizeof(res->stateid.data));
3077         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3078
3079         decode_change_info(xdr, &res->cinfo);
3080
3081         READ_BUF(8);
3082         READ32(res->rflags);
3083         READ32(bmlen);
3084         if (bmlen > 10)
3085                 goto xdr_error;
3086
3087         READ_BUF(bmlen << 2);
3088         p += bmlen;
3089         return decode_delegation(xdr, res);
3090 xdr_error:
3091         printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__);
3092         return -EIO;
3093 }
3094
3095 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3096 {
3097         uint32_t *p;
3098         int status;
3099
3100         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3101         if (status)
3102                 return status;
3103         READ_BUF(sizeof(res->stateid.data));
3104         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3105         return 0;
3106 }
3107
3108 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3109 {
3110         uint32_t *p;
3111         int status;
3112
3113         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3114         if (status)
3115                 return status;
3116         READ_BUF(sizeof(res->stateid.data));
3117         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3118         return 0;
3119 }
3120
3121 static int decode_putfh(struct xdr_stream *xdr)
3122 {
3123         return decode_op_hdr(xdr, OP_PUTFH);
3124 }
3125
3126 static int decode_putrootfh(struct xdr_stream *xdr)
3127 {
3128         return decode_op_hdr(xdr, OP_PUTROOTFH);
3129 }
3130
3131 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3132 {
3133         struct kvec *iov = req->rq_rcv_buf.head;
3134         uint32_t *p;
3135         uint32_t count, eof, recvd, hdrlen;
3136         int status;
3137
3138         status = decode_op_hdr(xdr, OP_READ);
3139         if (status)
3140                 return status;
3141         READ_BUF(8);
3142         READ32(eof);
3143         READ32(count);
3144         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3145         recvd = req->rq_rcv_buf.len - hdrlen;
3146         if (count > recvd) {
3147                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3148                                 "count %u > recvd %u\n", count, recvd);
3149                 count = recvd;
3150                 eof = 0;
3151         }
3152         xdr_read_pages(xdr, count);
3153         res->eof = eof;
3154         res->count = count;
3155         return 0;
3156 }
3157
3158 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3159 {
3160         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3161         struct page     *page = *rcvbuf->pages;
3162         struct kvec     *iov = rcvbuf->head;
3163         unsigned int    nr, pglen = rcvbuf->page_len;
3164         uint32_t        *end, *entry, *p, *kaddr;
3165         uint32_t        len, attrlen;
3166         int             hdrlen, recvd, status;
3167
3168         status = decode_op_hdr(xdr, OP_READDIR);
3169         if (status)
3170                 return status;
3171         READ_BUF(8);
3172         COPYMEM(readdir->verifier.data, 8);
3173         dprintk("%s: verifier = 0x%x%x\n",
3174                         __FUNCTION__,
3175                         ((u32 *)readdir->verifier.data)[0],
3176                         ((u32 *)readdir->verifier.data)[1]);
3177
3178
3179         hdrlen = (char *) p - (char *) iov->iov_base;
3180         recvd = rcvbuf->len - hdrlen;
3181         if (pglen > recvd)
3182                 pglen = recvd;
3183         xdr_read_pages(xdr, pglen);
3184
3185         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3186         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3187         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3188         entry = p;
3189         for (nr = 0; *p++; nr++) {
3190                 if (p + 3 > end)
3191                         goto short_pkt;
3192                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3193                 p += 2;                 /* cookie */
3194                 len = ntohl(*p++);      /* filename length */
3195                 if (len > NFS4_MAXNAMLEN) {
3196                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3197                         goto err_unmap;
3198                 }
3199                 dprintk("filename = %*s\n", len, (char *)p);
3200                 p += XDR_QUADLEN(len);
3201                 if (p + 1 > end)
3202                         goto short_pkt;
3203                 len = ntohl(*p++);      /* bitmap length */
3204                 p += len;
3205                 if (p + 1 > end)
3206                         goto short_pkt;
3207                 attrlen = XDR_QUADLEN(ntohl(*p++));
3208                 p += attrlen;           /* attributes */
3209                 if (p + 2 > end)
3210                         goto short_pkt;
3211                 entry = p;
3212         }
3213         if (!nr && (entry[0] != 0 || entry[1] == 0))
3214                 goto short_pkt;
3215 out:
3216         kunmap_atomic(kaddr, KM_USER0);
3217         return 0;
3218 short_pkt:
3219         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3220         entry[0] = entry[1] = 0;
3221         /* truncate listing ? */
3222         if (!nr) {
3223                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3224                 entry[1] = 1;
3225         }
3226         goto out;
3227 err_unmap:
3228         kunmap_atomic(kaddr, KM_USER0);
3229         return -errno_NFSERR_IO;
3230 }
3231
3232 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3233 {
3234         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3235         struct kvec *iov = rcvbuf->head;
3236         int hdrlen, len, recvd;
3237         uint32_t *p;
3238         char *kaddr;
3239         int status;
3240
3241         status = decode_op_hdr(xdr, OP_READLINK);
3242         if (status)
3243                 return status;
3244
3245         /* Convert length of symlink */
3246         READ_BUF(4);
3247         READ32(len);
3248         if (len >= rcvbuf->page_len || len <= 0) {
3249                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3250                 return -ENAMETOOLONG;
3251         }
3252         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3253         recvd = req->rq_rcv_buf.len - hdrlen;
3254         if (recvd < len) {
3255                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3256                                 "count %u > recvd %u\n", len, recvd);
3257                 return -EIO;
3258         }
3259         xdr_read_pages(xdr, len);
3260         /*
3261          * The XDR encode routine has set things up so that
3262          * the link text will be copied directly into the
3263          * buffer.  We just have to do overflow-checking,
3264          * and and null-terminate the text (the VFS expects
3265          * null-termination).
3266          */
3267         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3268         kaddr[len+rcvbuf->page_base] = '\0';
3269         kunmap_atomic(kaddr, KM_USER0);
3270         return 0;
3271 }
3272
3273 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3274 {
3275         int status;
3276
3277         status = decode_op_hdr(xdr, OP_REMOVE);
3278         if (status)
3279                 goto out;
3280         status = decode_change_info(xdr, cinfo);
3281 out:
3282         return status;
3283 }
3284
3285 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3286               struct nfs4_change_info *new_cinfo)
3287 {
3288         int status;
3289
3290         status = decode_op_hdr(xdr, OP_RENAME);
3291         if (status)
3292                 goto out;
3293         if ((status = decode_change_info(xdr, old_cinfo)))
3294                 goto out;
3295         status = decode_change_info(xdr, new_cinfo);
3296 out:
3297         return status;
3298 }
3299
3300 static int decode_renew(struct xdr_stream *xdr)
3301 {
3302         return decode_op_hdr(xdr, OP_RENEW);
3303 }
3304
3305 static int
3306 decode_restorefh(struct xdr_stream *xdr)
3307 {
3308         return decode_op_hdr(xdr, OP_RESTOREFH);
3309 }
3310
3311 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3312                 size_t *acl_len)
3313 {
3314         uint32_t *savep;
3315         uint32_t attrlen,
3316                  bitmap[2] = {0};
3317         struct kvec *iov = req->rq_rcv_buf.head;
3318         int status;
3319
3320         *acl_len = 0;
3321         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3322                 goto out;
3323         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3324                 goto out;
3325         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3326                 goto out;
3327
3328         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3329                 return -EIO;
3330         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3331                 int hdrlen, recvd;
3332
3333                 /* We ignore &savep and don't do consistency checks on
3334                  * the attr length.  Let userspace figure it out.... */
3335                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3336                 recvd = req->rq_rcv_buf.len - hdrlen;
3337                 if (attrlen > recvd) {
3338                         printk(KERN_WARNING "NFS: server cheating in getattr"
3339                                         " acl reply: attrlen %u > recvd %u\n",
3340                                         attrlen, recvd);
3341                         return -EINVAL;
3342                 }
3343                 if (attrlen <= *acl_len)
3344                         xdr_read_pages(xdr, attrlen);
3345                 *acl_len = attrlen;
3346         } else
3347                 status = -EOPNOTSUPP;
3348
3349 out:
3350         return status;
3351 }
3352
3353 static int
3354 decode_savefh(struct xdr_stream *xdr)
3355 {
3356         return decode_op_hdr(xdr, OP_SAVEFH);
3357 }
3358
3359 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3360 {
3361         uint32_t *p;
3362         uint32_t bmlen;
3363         int status;
3364
3365
3366         status = decode_op_hdr(xdr, OP_SETATTR);
3367         if (status)
3368                 return status;
3369         READ_BUF(4);
3370         READ32(bmlen);
3371         READ_BUF(bmlen << 2);
3372         return 0;
3373 }
3374
3375 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3376 {
3377         uint32_t *p;
3378         uint32_t opnum;
3379         int32_t nfserr;
3380
3381         READ_BUF(8);
3382         READ32(opnum);
3383         if (opnum != OP_SETCLIENTID) {
3384                 printk(KERN_NOTICE
3385                                 "nfs4_decode_setclientid: Server returned operation"
3386                                 " %d\n", opnum);
3387                 return -EIO;
3388         }
3389         READ32(nfserr);
3390         if (nfserr == NFS_OK) {
3391                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3392                 READ64(clp->cl_clientid);
3393                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3394         } else if (nfserr == NFSERR_CLID_INUSE) {
3395                 uint32_t len;
3396
3397                 /* skip netid string */
3398                 READ_BUF(4);
3399                 READ32(len);
3400                 READ_BUF(len);
3401
3402                 /* skip uaddr string */
3403                 READ_BUF(4);
3404                 READ32(len);
3405                 READ_BUF(len);
3406                 return -NFSERR_CLID_INUSE;
3407         } else
3408                 return -nfs_stat_to_errno(nfserr);
3409
3410         return 0;
3411 }
3412
3413 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3414 {
3415         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3416 }
3417
3418 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3419 {
3420         uint32_t *p;
3421         int status;
3422
3423         status = decode_op_hdr(xdr, OP_WRITE);
3424         if (status)
3425                 return status;
3426
3427         READ_BUF(16);
3428         READ32(res->count);
3429         READ32(res->verf->committed);
3430         COPYMEM(res->verf->verifier, 8);
3431         return 0;
3432 }
3433
3434 static int decode_delegreturn(struct xdr_stream *xdr)
3435 {
3436         return decode_op_hdr(xdr, OP_DELEGRETURN);
3437 }
3438
3439 /*
3440  * Decode OPEN_DOWNGRADE response
3441  */
3442 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3443 {
3444         struct xdr_stream xdr;
3445         struct compound_hdr hdr;
3446         int status;
3447
3448         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3449         status = decode_compound_hdr(&xdr, &hdr);
3450         if (status)
3451                 goto out;
3452         status = decode_putfh(&xdr);
3453         if (status)
3454                 goto out;
3455         status = decode_open_downgrade(&xdr, res);
3456         if (status != 0)
3457                 goto out;
3458         decode_getfattr(&xdr, res->fattr, res->server);
3459 out:
3460         return status;
3461 }
3462
3463 /*
3464  * END OF "GENERIC" DECODE ROUTINES.
3465  */
3466
3467 /*
3468  * Decode ACCESS response
3469  */
3470 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3471 {
3472         struct xdr_stream xdr;
3473         struct compound_hdr hdr;
3474         int status;
3475
3476         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3477         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3478                 goto out;
3479         if ((status = decode_putfh(&xdr)) == 0)
3480                 status = decode_access(&xdr, res);
3481 out:
3482         return status;
3483 }
3484
3485 /*
3486  * Decode LOOKUP response
3487  */
3488 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3489 {
3490         struct xdr_stream xdr;
3491         struct compound_hdr hdr;
3492         int status;
3493
3494         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3495         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3496                 goto out;
3497         if ((status = decode_putfh(&xdr)) != 0)
3498                 goto out;
3499         if ((status = decode_lookup(&xdr)) != 0)
3500                 goto out;
3501         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3502                 goto out;
3503         status = decode_getfattr(&xdr, res->fattr, res->server);
3504 out:
3505         return status;
3506 }
3507
3508 /*
3509  * Decode LOOKUP_ROOT response
3510  */
3511 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3512 {
3513         struct xdr_stream xdr;
3514         struct compound_hdr hdr;
3515         int status;
3516
3517         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3518         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3519                 goto out;
3520         if ((status = decode_putrootfh(&xdr)) != 0)
3521                 goto out;
3522         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3523                 status = decode_getfattr(&xdr, res->fattr, res->server);
3524 out:
3525         return status;
3526 }
3527
3528 /*
3529  * Decode REMOVE response
3530  */
3531 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3532 {
3533         struct xdr_stream xdr;
3534         struct compound_hdr hdr;
3535         int status;
3536
3537         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3538         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3539                 goto out;
3540         if ((status = decode_putfh(&xdr)) != 0)
3541                 goto out;
3542         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3543                 goto out;
3544         decode_getfattr(&xdr, res->dir_attr, res->server);
3545 out:
3546         return status;
3547 }
3548
3549 /*
3550  * Decode RENAME response
3551  */
3552 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3553 {
3554         struct xdr_stream xdr;
3555         struct compound_hdr hdr;
3556         int status;
3557
3558         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3559         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3560                 goto out;
3561         if ((status = decode_putfh(&xdr)) != 0)
3562                 goto out;
3563         if ((status = decode_savefh(&xdr)) != 0)
3564                 goto out;
3565         if ((status = decode_putfh(&xdr)) != 0)
3566                 goto out;
3567         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3568                 goto out;
3569         /* Current FH is target directory */
3570         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3571                 goto out;
3572         if ((status = decode_restorefh(&xdr)) != 0)
3573                 goto out;
3574         decode_getfattr(&xdr, res->old_fattr, res->server);
3575 out:
3576         return status;
3577 }
3578
3579 /*
3580  * Decode LINK response
3581  */
3582 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3583 {
3584         struct xdr_stream xdr;
3585         struct compound_hdr hdr;
3586         int status;
3587
3588         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3589         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3590                 goto out;
3591         if ((status = decode_putfh(&xdr)) != 0)
3592                 goto out;
3593         if ((status = decode_savefh(&xdr)) != 0)
3594                 goto out;
3595         if ((status = decode_putfh(&xdr)) != 0)
3596                 goto out;
3597         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3598                 goto out;
3599         /*
3600          * Note order: OP_LINK leaves the directory as the current
3601          *             filehandle.
3602          */
3603         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3604                 goto out;
3605         if ((status = decode_restorefh(&xdr)) != 0)
3606                 goto out;
3607         decode_getfattr(&xdr, res->fattr, res->server);
3608 out:
3609         return status;
3610 }
3611
3612 /*
3613  * Decode CREATE response
3614  */
3615 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3616 {
3617         struct xdr_stream xdr;
3618         struct compound_hdr hdr;
3619         int status;
3620
3621         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3622         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3623                 goto out;
3624         if ((status = decode_putfh(&xdr)) != 0)
3625                 goto out;
3626         if ((status = decode_savefh(&xdr)) != 0)
3627                 goto out;
3628         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3629                 goto out;
3630         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3631                 goto out;
3632         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3633                 goto out;
3634         if ((status = decode_restorefh(&xdr)) != 0)
3635                 goto out;
3636         decode_getfattr(&xdr, res->dir_fattr, res->server);
3637 out:
3638         return status;
3639 }
3640
3641 /*
3642  * Decode SYMLINK response
3643  */
3644 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3645 {
3646         return nfs4_xdr_dec_create(rqstp, p, res);
3647 }
3648
3649 /*
3650  * Decode GETATTR response
3651  */
3652 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3653 {
3654         struct xdr_stream xdr;
3655         struct compound_hdr hdr;
3656         int status;
3657
3658         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3659         status = decode_compound_hdr(&xdr, &hdr);
3660         if (status)
3661                 goto out;
3662         status = decode_putfh(&xdr);
3663         if (status)
3664                 goto out;
3665         status = decode_getfattr(&xdr, res->fattr, res->server);
3666 out:
3667         return status;
3668
3669 }
3670
3671 /*
3672  * Encode an SETACL request
3673  */
3674 static int
3675 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3676 {
3677         struct xdr_stream xdr;
3678         struct compound_hdr hdr = {
3679                 .nops   = 2,
3680         };
3681         int status;
3682
3683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3684         encode_compound_hdr(&xdr, &hdr);
3685         status = encode_putfh(&xdr, args->fh);
3686         if (status)
3687                 goto out;
3688         status = encode_setacl(&xdr, args);
3689 out:
3690         return status;
3691 }
3692 /*
3693  * Decode SETACL response
3694  */
3695 static int
3696 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3697 {
3698         struct xdr_stream xdr;
3699         struct compound_hdr hdr;
3700         int status;
3701
3702         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3703         status = decode_compound_hdr(&xdr, &hdr);
3704         if (status)
3705                 goto out;
3706         status = decode_putfh(&xdr);
3707         if (status)
3708                 goto out;
3709         status = decode_setattr(&xdr, res);
3710 out:
3711         return status;
3712 }
3713
3714 /*
3715  * Decode GETACL response
3716  */
3717 static int
3718 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3719 {
3720         struct xdr_stream xdr;
3721         struct compound_hdr hdr;
3722         int status;
3723
3724         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3725         status = decode_compound_hdr(&xdr, &hdr);
3726         if (status)
3727                 goto out;
3728         status = decode_putfh(&xdr);
3729         if (status)
3730                 goto out;
3731         status = decode_getacl(&xdr, rqstp, acl_len);
3732
3733 out:
3734         return status;
3735 }
3736
3737 /*
3738  * Decode CLOSE response
3739  */
3740 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3741 {
3742         struct xdr_stream xdr;
3743         struct compound_hdr hdr;
3744         int status;
3745
3746         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3747         status = decode_compound_hdr(&xdr, &hdr);
3748         if (status)
3749                 goto out;
3750         status = decode_putfh(&xdr);
3751         if (status)
3752                 goto out;
3753         status = decode_close(&xdr, res);
3754         if (status != 0)
3755                 goto out;
3756         /*
3757          * Note: Server may do delete on close for this file
3758          *      in which case the getattr call will fail with
3759          *      an ESTALE error. Shouldn't be a problem,
3760          *      though, since fattr->valid will remain unset.
3761          */
3762         decode_getfattr(&xdr, res->fattr, res->server);
3763 out:
3764         return status;
3765 }
3766
3767 /*
3768  * Decode OPEN response
3769  */
3770 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3771 {
3772         struct xdr_stream xdr;
3773         struct compound_hdr hdr;
3774         int status;
3775
3776         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3777         status = decode_compound_hdr(&xdr, &hdr);
3778         if (status)
3779                 goto out;
3780         status = decode_putfh(&xdr);
3781         if (status)
3782                 goto out;
3783         status = decode_savefh(&xdr);
3784         if (status)
3785                 goto out;
3786         status = decode_open(&xdr, res);
3787         if (status)
3788                 goto out;
3789         status = decode_getfh(&xdr, &res->fh);
3790         if (status)
3791                 goto out;
3792         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3793                 goto out;
3794         if ((status = decode_restorefh(&xdr)) != 0)
3795                 goto out;
3796         decode_getfattr(&xdr, res->dir_attr, res->server);
3797 out:
3798         return status;
3799 }
3800
3801 /*
3802  * Decode OPEN_CONFIRM response
3803  */
3804 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3805 {
3806         struct xdr_stream xdr;
3807         struct compound_hdr hdr;
3808         int status;
3809
3810         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3811         status = decode_compound_hdr(&xdr, &hdr);
3812         if (status)
3813                 goto out;
3814         status = decode_putfh(&xdr);
3815         if (status)
3816                 goto out;
3817         status = decode_open_confirm(&xdr, res);
3818 out:
3819         return status;
3820 }
3821
3822 /*
3823  * Decode OPEN response
3824  */
3825 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3826 {
3827         struct xdr_stream xdr;
3828         struct compound_hdr hdr;
3829         int status;
3830
3831         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3832         status = decode_compound_hdr(&xdr, &hdr);
3833         if (status)
3834                 goto out;
3835         status = decode_putfh(&xdr);
3836         if (status)
3837                 goto out;
3838         status = decode_open(&xdr, res);
3839 out:
3840         return status;
3841 }
3842
3843 /*
3844  * Decode SETATTR response
3845  */
3846 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3847 {
3848         struct xdr_stream xdr;
3849         struct compound_hdr hdr;
3850         int status;
3851
3852         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3853         status = decode_compound_hdr(&xdr, &hdr);
3854         if (status)
3855                 goto out;
3856         status = decode_putfh(&xdr);
3857         if (status)
3858                 goto out;
3859         status = decode_setattr(&xdr, res);
3860         if (status)
3861                 goto out;
3862         status = decode_getfattr(&xdr, res->fattr, res->server);
3863         if (status == NFS4ERR_DELAY)
3864                 status = 0;
3865 out:
3866         return status;
3867 }
3868
3869 /*
3870  * Decode LOCK response
3871  */
3872 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3873 {
3874         struct xdr_stream xdr;
3875         struct compound_hdr hdr;
3876         int status;
3877
3878         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3879         status = decode_compound_hdr(&xdr, &hdr);
3880         if (status)
3881                 goto out;
3882         status = decode_putfh(&xdr);
3883         if (status)
3884                 goto out;
3885         status = decode_lock(&xdr, res);
3886 out:
3887         return status;
3888 }
3889
3890 /*
3891  * Decode LOCKT response
3892  */
3893 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3894 {
3895         struct xdr_stream xdr;
3896         struct compound_hdr hdr;
3897         int status;
3898
3899         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3900         status = decode_compound_hdr(&xdr, &hdr);
3901         if (status)
3902                 goto out;
3903         status = decode_putfh(&xdr);
3904         if (status)
3905                 goto out;
3906         status = decode_lockt(&xdr, res);
3907 out:
3908         return status;
3909 }
3910
3911 /*
3912  * Decode LOCKU response
3913  */
3914 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockres *res)
3915 {
3916         struct xdr_stream xdr;
3917         struct compound_hdr hdr;
3918         int status;
3919
3920         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3921         status = decode_compound_hdr(&xdr, &hdr);
3922         if (status)
3923                 goto out;
3924         status = decode_putfh(&xdr);
3925         if (status)
3926                 goto out;
3927         status = decode_locku(&xdr, res);
3928 out:
3929         return status;
3930 }
3931
3932 /*
3933  * Decode READLINK response
3934  */
3935 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3936 {
3937         struct xdr_stream xdr;
3938         struct compound_hdr hdr;
3939         int status;
3940
3941         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3942         status = decode_compound_hdr(&xdr, &hdr);
3943         if (status)
3944                 goto out;
3945         status = decode_putfh(&xdr);
3946         if (status)
3947                 goto out;
3948         status = decode_readlink(&xdr, rqstp);
3949 out:
3950         return status;
3951 }
3952
3953 /*
3954  * Decode READDIR response
3955  */
3956 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3957 {
3958         struct xdr_stream xdr;
3959         struct compound_hdr hdr;
3960         int status;
3961
3962         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3963         status = decode_compound_hdr(&xdr, &hdr);
3964         if (status)
3965                 goto out;
3966         status = decode_putfh(&xdr);
3967         if (status)
3968                 goto out;
3969         status = decode_readdir(&xdr, rqstp, res);
3970 out:
3971         return status;
3972 }
3973
3974 /*
3975  * Decode Read response
3976  */
3977 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3978 {
3979         struct xdr_stream xdr;
3980         struct compound_hdr hdr;
3981         int status;
3982
3983         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3984         status = decode_compound_hdr(&xdr, &hdr);
3985         if (status)
3986                 goto out;
3987         status = decode_putfh(&xdr);
3988         if (status)
3989                 goto out;
3990         status = decode_read(&xdr, rqstp, res);
3991         if (!status)
3992                 status = res->count;
3993 out:
3994         return status;
3995 }
3996
3997 /*
3998  * Decode WRITE response
3999  */
4000 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4001 {
4002         struct xdr_stream xdr;
4003         struct compound_hdr hdr;
4004         int status;
4005
4006         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4007         status = decode_compound_hdr(&xdr, &hdr);
4008         if (status)
4009                 goto out;
4010         status = decode_putfh(&xdr);
4011         if (status)
4012                 goto out;
4013         status = decode_write(&xdr, res);
4014         if (status)
4015                 goto out;
4016         decode_getfattr(&xdr, res->fattr, res->server);
4017         if (!status)
4018                 status = res->count;
4019 out:
4020         return status;
4021 }
4022
4023 /*
4024  * Decode COMMIT response
4025  */
4026 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4027 {
4028         struct xdr_stream xdr;
4029         struct compound_hdr hdr;
4030         int status;
4031
4032         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4033         status = decode_compound_hdr(&xdr, &hdr);
4034         if (status)
4035                 goto out;
4036         status = decode_putfh(&xdr);
4037         if (status)
4038                 goto out;
4039         status = decode_commit(&xdr, res);
4040         if (status)
4041                 goto out;
4042         decode_getfattr(&xdr, res->fattr, res->server);
4043 out:
4044         return status;
4045 }
4046
4047 /*
4048  * FSINFO request
4049  */
4050 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4051 {
4052         struct xdr_stream xdr;
4053         struct compound_hdr hdr;
4054         int status;
4055
4056         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4057         status = decode_compound_hdr(&xdr, &hdr);
4058         if (!status)
4059                 status = decode_putfh(&xdr);
4060         if (!status)
4061                 status = decode_fsinfo(&xdr, fsinfo);
4062         if (!status)
4063                 status = -nfs_stat_to_errno(hdr.status);
4064         return status;
4065 }
4066
4067 /*
4068  * PATHCONF request
4069  */
4070 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4071 {
4072         struct xdr_stream xdr;
4073         struct compound_hdr hdr;
4074         int status;
4075
4076         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4077         status = decode_compound_hdr(&xdr, &hdr);
4078         if (!status)
4079                 status = decode_putfh(&xdr);
4080         if (!status)
4081                 status = decode_pathconf(&xdr, pathconf);
4082         return status;
4083 }
4084
4085 /*
4086  * STATFS request
4087  */
4088 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4089 {
4090         struct xdr_stream xdr;
4091         struct compound_hdr hdr;
4092         int status;
4093
4094         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4095         status = decode_compound_hdr(&xdr, &hdr);
4096         if (!status)
4097                 status = decode_putfh(&xdr);
4098         if (!status)
4099                 status = decode_statfs(&xdr, fsstat);
4100         return status;
4101 }
4102
4103 /*
4104  * GETATTR_BITMAP request
4105  */
4106 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4107 {
4108         struct xdr_stream xdr;
4109         struct compound_hdr hdr;
4110         int status;
4111
4112         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4113         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4114                 goto out;
4115         if ((status = decode_putfh(&xdr)) != 0)
4116                 goto out;
4117         status = decode_server_caps(&xdr, res);
4118 out:
4119         return status;
4120 }
4121
4122 /*
4123  * Decode RENEW response
4124  */
4125 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4126 {
4127         struct xdr_stream xdr;
4128         struct compound_hdr hdr;
4129         int status;
4130
4131         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4132         status = decode_compound_hdr(&xdr, &hdr);
4133         if (!status)
4134                 status = decode_renew(&xdr);
4135         return status;
4136 }
4137
4138 /*
4139  * a SETCLIENTID request
4140  */
4141 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4142                 struct nfs4_client *clp)
4143 {
4144         struct xdr_stream xdr;
4145         struct compound_hdr hdr;
4146         int status;
4147
4148         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4149         status = decode_compound_hdr(&xdr, &hdr);
4150         if (!status)
4151                 status = decode_setclientid(&xdr, clp);
4152         if (!status)
4153                 status = -nfs_stat_to_errno(hdr.status);
4154         return status;
4155 }
4156
4157 /*
4158  * a SETCLIENTID_CONFIRM request
4159  */
4160 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4161 {
4162         struct xdr_stream xdr;
4163         struct compound_hdr hdr;
4164         int status;
4165
4166         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4167         status = decode_compound_hdr(&xdr, &hdr);
4168         if (!status)
4169                 status = decode_setclientid_confirm(&xdr);
4170         if (!status)
4171                 status = decode_putrootfh(&xdr);
4172         if (!status)
4173                 status = decode_fsinfo(&xdr, fsinfo);
4174         if (!status)
4175                 status = -nfs_stat_to_errno(hdr.status);
4176         return status;
4177 }
4178
4179 /*
4180  * DELEGRETURN request
4181  */
4182 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4183 {
4184         struct xdr_stream xdr;
4185         struct compound_hdr hdr;
4186         int status;
4187
4188         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4189         status = decode_compound_hdr(&xdr, &hdr);
4190         if (status == 0) {
4191                 status = decode_putfh(&xdr);
4192                 if (status == 0)
4193                         status = decode_delegreturn(&xdr);
4194         }
4195         return status;
4196 }
4197
4198 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4199 {
4200         uint32_t bitmap[2] = {0};
4201         uint32_t len;
4202
4203         if (!*p++) {
4204                 if (!*p)
4205                         return ERR_PTR(-EAGAIN);
4206                 entry->eof = 1;
4207                 return ERR_PTR(-EBADCOOKIE);
4208         }
4209
4210         entry->prev_cookie = entry->cookie;
4211         p = xdr_decode_hyper(p, &entry->cookie);
4212         entry->len = ntohl(*p++);
4213         entry->name = (const char *) p;
4214         p += XDR_QUADLEN(entry->len);
4215
4216         /*
4217          * In case the server doesn't return an inode number,
4218          * we fake one here.  (We don't use inode number 0,
4219          * since glibc seems to choke on it...)
4220          */
4221         entry->ino = 1;
4222
4223         len = ntohl(*p++);              /* bitmap length */
4224         if (len-- > 0) {
4225                 bitmap[0] = ntohl(*p++);
4226                 if (len-- > 0) {
4227                         bitmap[1] = ntohl(*p++);
4228                         p += len;
4229                 }
4230         }
4231         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4232         if (len > 0) {
4233                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4234                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4235                         /* Ignore the return value of rdattr_error for now */
4236                         p++;
4237                         len--;
4238                 }
4239                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4240                         xdr_decode_hyper(p, &entry->ino);
4241                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4242                         xdr_decode_hyper(p, &entry->ino);
4243                 p += len;
4244         }
4245
4246         entry->eof = !p[0] && p[1];
4247         return p;
4248 }
4249
4250 /*
4251  * We need to translate between nfs status return values and
4252  * the local errno values which may not be the same.
4253  */
4254 static struct {
4255         int stat;
4256         int errno;
4257 } nfs_errtbl[] = {
4258         { NFS4_OK,              0               },
4259         { NFS4ERR_PERM,         EPERM           },
4260         { NFS4ERR_NOENT,        ENOENT          },
4261         { NFS4ERR_IO,           errno_NFSERR_IO },
4262         { NFS4ERR_NXIO,         ENXIO           },
4263         { NFS4ERR_ACCESS,       EACCES          },
4264         { NFS4ERR_EXIST,        EEXIST          },
4265         { NFS4ERR_XDEV,         EXDEV           },
4266         { NFS4ERR_NOTDIR,       ENOTDIR         },
4267         { NFS4ERR_ISDIR,        EISDIR          },
4268         { NFS4ERR_INVAL,        EINVAL          },
4269         { NFS4ERR_FBIG,         EFBIG           },
4270         { NFS4ERR_NOSPC,        ENOSPC          },
4271         { NFS4ERR_ROFS,         EROFS           },
4272         { NFS4ERR_MLINK,        EMLINK          },
4273         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4274         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4275         { NFS4ERR_DQUOT,        EDQUOT          },
4276         { NFS4ERR_STALE,        ESTALE          },
4277         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4278         { NFS4ERR_BADOWNER,     EINVAL          },
4279         { NFS4ERR_BADNAME,      EINVAL          },
4280         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4281         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4282         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4283         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4284         { NFS4ERR_BADTYPE,      EBADTYPE        },
4285         { NFS4ERR_LOCKED,       EAGAIN          },
4286         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4287         { NFS4ERR_SYMLINK,      ELOOP           },
4288         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4289         { NFS4ERR_DEADLOCK,     EDEADLK         },
4290         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4291                                                     * to be handled by a
4292                                                     * middle-layer.
4293                                                     */
4294         { -1,                   EIO             }
4295 };
4296
4297 /*
4298  * Convert an NFS error code to a local one.
4299  * This one is used jointly by NFSv2 and NFSv3.
4300  */
4301 static int
4302 nfs_stat_to_errno(int stat)
4303 {
4304         int i;
4305         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4306                 if (nfs_errtbl[i].stat == stat)
4307                         return nfs_errtbl[i].errno;
4308         }
4309         if (stat <= 10000 || stat > 10100) {
4310                 /* The server is looney tunes. */
4311                 return ESERVERFAULT;
4312         }
4313         /* If we cannot translate the error, the recovery routines should
4314          * handle it.
4315          * Note: remaining NFSv4 error codes have values > 10000, so should
4316          * not conflict with native Linux error codes.
4317          */
4318         return stat;
4319 }
4320
4321 #ifndef MAX
4322 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4323 #endif
4324
4325 #define PROC(proc, argtype, restype)                            \
4326 [NFSPROC4_CLNT_##proc] = {                                      \
4327         .p_proc   = NFSPROC4_COMPOUND,                          \
4328         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4329         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4330         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4331     }
4332
4333 struct rpc_procinfo     nfs4_procedures[] = {
4334   PROC(READ,            enc_read,       dec_read),
4335   PROC(WRITE,           enc_write,      dec_write),
4336   PROC(COMMIT,          enc_commit,     dec_commit),
4337   PROC(OPEN,            enc_open,       dec_open),
4338   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4339   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4340   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4341   PROC(CLOSE,           enc_close,      dec_close),
4342   PROC(SETATTR,         enc_setattr,    dec_setattr),
4343   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4344   PROC(RENEW,           enc_renew,      dec_renew),
4345   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4346   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4347   PROC(LOCK,            enc_lock,       dec_lock),
4348   PROC(LOCKT,           enc_lockt,      dec_lockt),
4349   PROC(LOCKU,           enc_locku,      dec_locku),
4350   PROC(ACCESS,          enc_access,     dec_access),
4351   PROC(GETATTR,         enc_getattr,    dec_getattr),
4352   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4353   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4354   PROC(REMOVE,          enc_remove,     dec_remove),
4355   PROC(RENAME,          enc_rename,     dec_rename),
4356   PROC(LINK,            enc_link,       dec_link),
4357   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4358   PROC(CREATE,          enc_create,     dec_create),
4359   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4360   PROC(STATFS,          enc_statfs,     dec_statfs),
4361   PROC(READLINK,        enc_readlink,   dec_readlink),
4362   PROC(READDIR,         enc_readdir,    dec_readdir),
4363   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4364   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4365   PROC(GETACL,          enc_getacl,     dec_getacl),
4366   PROC(SETACL,          enc_setacl,     dec_setacl),
4367 };
4368
4369 struct rpc_version              nfs_version4 = {
4370         .number                 = 4,
4371         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4372         .procs                  = nfs4_procedures
4373 };
4374
4375 /*
4376  * Local variables:
4377  *  c-basic-offset: 8
4378  * End:
4379  */