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                                 encode_getattr_maxsz)
 397 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 398                                 decode_delegreturn_maxsz + \
 399                                 decode_getattr_maxsz)
 400 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 401                                 encode_putfh_maxsz + \
 402                                 encode_getattr_maxsz)
 403 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 404                                 decode_putfh_maxsz + \
 405                                 op_decode_hdr_maxsz + \
 406                                 nfs4_fattr_bitmap_maxsz + 1)
 407 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 408                                 encode_putfh_maxsz + \
 409                                 op_encode_hdr_maxsz + 4 + \
 410                                 nfs4_fattr_bitmap_maxsz + 1)
 411 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 412                                 decode_putfh_maxsz + \
 413                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 414
 415 static struct {
 416         unsigned int    mode;
 417         unsigned int    nfs2type;
 418 } nfs_type2fmt[] = {
 419         { 0,            NFNON        },
 420         { S_IFREG,      NFREG        },
 421         { S_IFDIR,      NFDIR        },
 422         { S_IFBLK,      NFBLK        },
 423         { S_IFCHR,      NFCHR        },
 424         { S_IFLNK,      NFLNK        },
 425         { S_IFSOCK,     NFSOCK       },
 426         { S_IFIFO,      NFFIFO       },
 427         { 0,            NFNON        },
 428         { 0,            NFNON        },
 429 };
 430
 431 struct compound_hdr {
 432         int32_t         status;
 433         uint32_t        nops;
 434         uint32_t        taglen;
 435         char *          tag;
 436 };
 437
 438 /*
 439  * START OF "GENERIC" ENCODE ROUTINES.
 440  *   These may look a little ugly since they are imported from a "generic"
 441  * set of XDR encode/decode routines which are intended to be shared by
 442  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 443  *
 444  * If the pain of reading these is too great, it should be a straightforward
 445  * task to translate them into Linux-specific versions which are more
 446  * consistent with the style used in NFSv2/v3...
 447  */
 448 #define WRITE32(n)               *p++ = htonl(n)
 449 #define WRITE64(n)               do {                           \
 450         *p++ = htonl((uint32_t)((n) >> 32));                            \
 451         *p++ = htonl((uint32_t)(n));                                    \
 452 } while (0)
 453 #define WRITEMEM(ptr,nbytes)     do {                           \
 454         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 455 } while (0)
 456
 457 #define RESERVE_SPACE(nbytes)   do {                            \
 458         p = xdr_reserve_space(xdr, nbytes);                     \
 459         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 460         BUG_ON(!p);                                             \
 461 } while (0)
 462
 463 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 464 {
 465         uint32_t *p;
 466
 467         p = xdr_reserve_space(xdr, 4 + len);
 468         BUG_ON(p == NULL);
 469         xdr_encode_opaque(p, str, len);
 470 }
 471
 472 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 473 {
 474         uint32_t *p;
 475
 476         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 477         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 478         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 479         WRITE32(hdr->taglen);
 480         WRITEMEM(hdr->tag, hdr->taglen);
 481         WRITE32(NFS4_MINOR_VERSION);
 482         WRITE32(hdr->nops);
 483         return 0;
 484 }
 485
 486 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 487 {
 488         uint32_t *p;
 489
 490         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 491         BUG_ON(p == NULL);
 492         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 493 }
 494
 495 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 496 {
 497         char owner_name[IDMAP_NAMESZ];
 498         char owner_group[IDMAP_NAMESZ];
 499         int owner_namelen = 0;
 500         int owner_grouplen = 0;
 501         uint32_t *p;
 502         uint32_t *q;
 503         int len;
 504         uint32_t bmval0 = 0;
 505         uint32_t bmval1 = 0;
 506         int status;
 507
 508         /*
 509          * We reserve enough space to write the entire attribute buffer at once.
 510          * In the worst-case, this would be
 511          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 512          *          = 36 bytes, plus any contribution from variable-length fields
 513          *            such as owner/group.
 514          */
 515         len = 16;
 516
 517         /* Sigh */
 518         if (iap->ia_valid & ATTR_SIZE)
 519                 len += 8;
 520         if (iap->ia_valid & ATTR_MODE)
 521                 len += 4;
 522         if (iap->ia_valid & ATTR_UID) {
 523                 owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
 524                 if (owner_namelen < 0) {
 525                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 526                                iap->ia_uid);
 527                         /* XXX */
 528                         strcpy(owner_name, "nobody");
 529                         owner_namelen = sizeof("nobody") - 1;
 530                         /* goto out; */
 531                 }
 532                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 533         }
 534         if (iap->ia_valid & ATTR_GID) {
 535                 owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
 536                 if (owner_grouplen < 0) {
 537                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 538                                iap->ia_gid);
 539                         strcpy(owner_group, "nobody");
 540                         owner_grouplen = sizeof("nobody") - 1;
 541                         /* goto out; */
 542                 }
 543                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 544         }
 545         if (iap->ia_valid & ATTR_ATIME_SET)
 546                 len += 16;
 547         else if (iap->ia_valid & ATTR_ATIME)
 548                 len += 4;
 549         if (iap->ia_valid & ATTR_MTIME_SET)
 550                 len += 16;
 551         else if (iap->ia_valid & ATTR_MTIME)
 552                 len += 4;
 553         RESERVE_SPACE(len);
 554
 555         /*
 556          * We write the bitmap length now, but leave the bitmap and the attribute
 557          * buffer length to be backfilled at the end of this routine.
 558          */
 559         WRITE32(2);
 560         q = p;
 561         p += 3;
 562
 563         if (iap->ia_valid & ATTR_SIZE) {
 564                 bmval0 |= FATTR4_WORD0_SIZE;
 565                 WRITE64(iap->ia_size);
 566         }
 567         if (iap->ia_valid & ATTR_MODE) {
 568                 bmval1 |= FATTR4_WORD1_MODE;
 569                 WRITE32(iap->ia_mode & S_IALLUGO);
 570         }
 571         if (iap->ia_valid & ATTR_UID) {
 572                 bmval1 |= FATTR4_WORD1_OWNER;
 573                 WRITE32(owner_namelen);
 574                 WRITEMEM(owner_name, owner_namelen);
 575         }
 576         if (iap->ia_valid & ATTR_GID) {
 577                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 578                 WRITE32(owner_grouplen);
 579                 WRITEMEM(owner_group, owner_grouplen);
 580         }
 581         if (iap->ia_valid & ATTR_ATIME_SET) {
 582                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 583                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 584                 WRITE32(0);
 585                 WRITE32(iap->ia_mtime.tv_sec);
 586                 WRITE32(iap->ia_mtime.tv_nsec);
 587         }
 588         else if (iap->ia_valid & ATTR_ATIME) {
 589                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 590                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 591         }
 592         if (iap->ia_valid & ATTR_MTIME_SET) {
 593                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 594                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 595                 WRITE32(0);
 596                 WRITE32(iap->ia_mtime.tv_sec);
 597                 WRITE32(iap->ia_mtime.tv_nsec);
 598         }
 599         else if (iap->ia_valid & ATTR_MTIME) {
 600                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 601                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 602         }
 603
 604         /*
 605          * Now we backfill the bitmap and the attribute buffer length.
 606          */
 607         if (len != ((char *)p - (char *)q) + 4) {
 608                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 609                                 len, ((char *)p - (char *)q) + 4);
 610                 BUG();
 611         }
 612         len = (char *)p - (char *)q - 12;
 613         *q++ = htonl(bmval0);
 614         *q++ = htonl(bmval1);
 615         *q++ = htonl(len);
 616
 617         status = 0;
 618 /* out: */
 619         return status;
 620 }
 621
 622 static int encode_access(struct xdr_stream *xdr, u32 access)
 623 {
 624         uint32_t *p;
 625
 626         RESERVE_SPACE(8);
 627         WRITE32(OP_ACCESS);
 628         WRITE32(access);
 629
 630         return 0;
 631 }
 632
 633 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 634 {
 635         uint32_t *p;
 636
 637         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 638         WRITE32(OP_CLOSE);
 639         WRITE32(arg->seqid->sequence->counter);
 640         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 641
 642         return 0;
 643 }
 644
 645 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 646 {
 647         uint32_t *p;
 648
 649         RESERVE_SPACE(16);
 650         WRITE32(OP_COMMIT);
 651         WRITE64(args->offset);
 652         WRITE32(args->count);
 653
 654         return 0;
 655 }
 656
 657 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 658 {
 659         uint32_t *p;
 660
 661         RESERVE_SPACE(8);
 662         WRITE32(OP_CREATE);
 663         WRITE32(create->ftype);
 664
 665         switch (create->ftype) {
 666         case NF4LNK:
 667                 RESERVE_SPACE(4 + create->u.symlink->len);
 668                 WRITE32(create->u.symlink->len);
 669                 WRITEMEM(create->u.symlink->name, create->u.symlink->len);
 670                 break;
 671
 672         case NF4BLK: case NF4CHR:
 673                 RESERVE_SPACE(8);
 674                 WRITE32(create->u.device.specdata1);
 675                 WRITE32(create->u.device.specdata2);
 676                 break;
 677
 678         default:
 679                 break;
 680         }
 681
 682         RESERVE_SPACE(4 + create->name->len);
 683         WRITE32(create->name->len);
 684         WRITEMEM(create->name->name, create->name->len);
 685
 686         return encode_attrs(xdr, create->attrs, create->server);
 687 }
 688
 689 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 690 {
 691         uint32_t *p;
 692
 693         RESERVE_SPACE(12);
 694         WRITE32(OP_GETATTR);
 695         WRITE32(1);
 696         WRITE32(bitmap);
 697         return 0;
 698 }
 699
 700 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 701 {
 702         uint32_t *p;
 703
 704         RESERVE_SPACE(16);
 705         WRITE32(OP_GETATTR);
 706         WRITE32(2);
 707         WRITE32(bm0);
 708         WRITE32(bm1);
 709         return 0;
 710 }
 711
 712 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 713 {
 714         return encode_getattr_two(xdr,
 715                         bitmask[0] & nfs4_fattr_bitmap[0],
 716                         bitmask[1] & nfs4_fattr_bitmap[1]);
 717 }
 718
 719 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 720 {
 721         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 722                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 723 }
 724
 725 static int encode_getfh(struct xdr_stream *xdr)
 726 {
 727         uint32_t *p;
 728
 729         RESERVE_SPACE(4);
 730         WRITE32(OP_GETFH);
 731
 732         return 0;
 733 }
 734
 735 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 736 {
 737         uint32_t *p;
 738
 739         RESERVE_SPACE(8 + name->len);
 740         WRITE32(OP_LINK);
 741         WRITE32(name->len);
 742         WRITEMEM(name->name, name->len);
 743
 744         return 0;
 745 }
 746
 747 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 748 {
 749         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 750                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 751         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 752 }
 753
 754 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 755 {
 756         if (fl->fl_end == OFFSET_MAX)
 757                 return ~(uint64_t)0;
 758         return fl->fl_end - fl->fl_start + 1;
 759 }
 760
 761 /*
 762  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 763  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 764  */
 765 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 766 {
 767         uint32_t *p;
 768
 769         RESERVE_SPACE(32);
 770         WRITE32(OP_LOCK);
 771         WRITE32(nfs4_lock_type(args->fl, args->block));
 772         WRITE32(args->reclaim);
 773         WRITE64(args->fl->fl_start);
 774         WRITE64(nfs4_lock_length(args->fl));
 775         WRITE32(args->new_lock_owner);
 776         if (args->new_lock_owner){
 777                 RESERVE_SPACE(40);
 778                 WRITE32(args->open_seqid->sequence->counter);
 779                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
 780                 WRITE32(args->lock_seqid->sequence->counter);
 781                 WRITE64(args->lock_owner.clientid);
 782                 WRITE32(4);
 783                 WRITE32(args->lock_owner.id);
 784         }
 785         else {
 786                 RESERVE_SPACE(20);
 787                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
 788                 WRITE32(args->lock_seqid->sequence->counter);
 789         }
 790
 791         return 0;
 792 }
 793
 794 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 795 {
 796         uint32_t *p;
 797
 798         RESERVE_SPACE(40);
 799         WRITE32(OP_LOCKT);
 800         WRITE32(nfs4_lock_type(args->fl, 0));
 801         WRITE64(args->fl->fl_start);
 802         WRITE64(nfs4_lock_length(args->fl));
 803         WRITE64(args->lock_owner.clientid);
 804         WRITE32(4);
 805         WRITE32(args->lock_owner.id);
 806
 807         return 0;
 808 }
 809
 810 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 811 {
 812         uint32_t *p;
 813
 814         RESERVE_SPACE(44);
 815         WRITE32(OP_LOCKU);
 816         WRITE32(nfs4_lock_type(args->fl, 0));
 817         WRITE32(args->seqid->sequence->counter);
 818         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
 819         WRITE64(args->fl->fl_start);
 820         WRITE64(nfs4_lock_length(args->fl));
 821
 822         return 0;
 823 }
 824
 825 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 826 {
 827         int len = name->len;
 828         uint32_t *p;
 829
 830         RESERVE_SPACE(8 + len);
 831         WRITE32(OP_LOOKUP);
 832         WRITE32(len);
 833         WRITEMEM(name->name, len);
 834
 835         return 0;
 836 }
 837
 838 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 839 {
 840         uint32_t *p;
 841
 842         RESERVE_SPACE(8);
 843         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 844                 case FMODE_READ:
 845                         WRITE32(NFS4_SHARE_ACCESS_READ);
 846                         break;
 847                 case FMODE_WRITE:
 848                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 849                         break;
 850                 case FMODE_READ|FMODE_WRITE:
 851                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 852                         break;
 853                 default:
 854                         BUG();
 855         }
 856         WRITE32(0);             /* for linux, share_deny = 0 always */
 857 }
 858
 859 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 860 {
 861         uint32_t *p;
 862  /*
 863  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 864  * owner 4 = 32
 865  */
 866         RESERVE_SPACE(8);
 867         WRITE32(OP_OPEN);
 868         WRITE32(arg->seqid->sequence->counter);
 869         encode_share_access(xdr, arg->open_flags);
 870         RESERVE_SPACE(16);
 871         WRITE64(arg->clientid);
 872         WRITE32(4);
 873         WRITE32(arg->id);
 874 }
 875
 876 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 877 {
 878         uint32_t *p;
 879
 880         RESERVE_SPACE(4);
 881         switch(arg->open_flags & O_EXCL) {
 882                 case 0:
 883                         WRITE32(NFS4_CREATE_UNCHECKED);
 884                         encode_attrs(xdr, arg->u.attrs, arg->server);
 885                         break;
 886                 default:
 887                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 888                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 889         }
 890 }
 891
 892 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 893 {
 894         uint32_t *p;
 895
 896         RESERVE_SPACE(4);
 897         switch (arg->open_flags & O_CREAT) {
 898                 case 0:
 899                         WRITE32(NFS4_OPEN_NOCREATE);
 900                         break;
 901                 default:
 902                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 903                         WRITE32(NFS4_OPEN_CREATE);
 904                         encode_createmode(xdr, arg);
 905         }
 906 }
 907
 908 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 909 {
 910         uint32_t *p;
 911
 912         RESERVE_SPACE(4);
 913         switch (delegation_type) {
 914                 case 0:
 915                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 916                         break;
 917                 case FMODE_READ:
 918                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 919                         break;
 920                 case FMODE_WRITE|FMODE_READ:
 921                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 922                         break;
 923                 default:
 924                         BUG();
 925         }
 926 }
 927
 928 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 929 {
 930         uint32_t *p;
 931
 932         RESERVE_SPACE(4);
 933         WRITE32(NFS4_OPEN_CLAIM_NULL);
 934         encode_string(xdr, name->len, name->name);
 935 }
 936
 937 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 938 {
 939         uint32_t *p;
 940
 941         RESERVE_SPACE(4);
 942         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 943         encode_delegation_type(xdr, type);
 944 }
 945
 946 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 947 {
 948         uint32_t *p;
 949
 950         RESERVE_SPACE(4+sizeof(stateid->data));
 951         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 952         WRITEMEM(stateid->data, sizeof(stateid->data));
 953         encode_string(xdr, name->len, name->name);
 954 }
 955
 956 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 957 {
 958         encode_openhdr(xdr, arg);
 959         encode_opentype(xdr, arg);
 960         switch (arg->claim) {
 961                 case NFS4_OPEN_CLAIM_NULL:
 962                         encode_claim_null(xdr, arg->name);
 963                         break;
 964                 case NFS4_OPEN_CLAIM_PREVIOUS:
 965                         encode_claim_previous(xdr, arg->u.delegation_type);
 966                         break;
 967                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 968                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 969                         break;
 970                 default:
 971                         BUG();
 972         }
 973         return 0;
 974 }
 975
 976 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 977 {
 978         uint32_t *p;
 979
 980         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 981         WRITE32(OP_OPEN_CONFIRM);
 982         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 983         WRITE32(arg->seqid->sequence->counter);
 984
 985         return 0;
 986 }
 987
 988 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 989 {
 990         uint32_t *p;
 991
 992         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 993         WRITE32(OP_OPEN_DOWNGRADE);
 994         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 995         WRITE32(arg->seqid->sequence->counter);
 996         encode_share_access(xdr, arg->open_flags);
 997         return 0;
 998 }
 999
1000 static int
1001 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1002 {
1003         int len = fh->size;
1004         uint32_t *p;
1005
1006         RESERVE_SPACE(8 + len);
1007         WRITE32(OP_PUTFH);
1008         WRITE32(len);
1009         WRITEMEM(fh->data, len);
1010
1011         return 0;
1012 }
1013
1014 static int encode_putrootfh(struct xdr_stream *xdr)
1015 {
1016         uint32_t *p;
1017
1018         RESERVE_SPACE(4);
1019         WRITE32(OP_PUTROOTFH);
1020
1021         return 0;
1022 }
1023
1024 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1025 {
1026         nfs4_stateid stateid;
1027         uint32_t *p;
1028
1029         RESERVE_SPACE(16);
1030         if (ctx->state != NULL) {
1031                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1032                 WRITEMEM(stateid.data, sizeof(stateid.data));
1033         } else
1034                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1035 }
1036
1037 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1038 {
1039         uint32_t *p;
1040
1041         RESERVE_SPACE(4);
1042         WRITE32(OP_READ);
1043
1044         encode_stateid(xdr, args->context);
1045
1046         RESERVE_SPACE(12);
1047         WRITE64(args->offset);
1048         WRITE32(args->count);
1049
1050         return 0;
1051 }
1052
1053 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1054 {
1055         struct rpc_auth *auth = req->rq_task->tk_auth;
1056         uint32_t attrs[2] = {
1057                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1058                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1059         };
1060         int replen;
1061         uint32_t *p;
1062
1063         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1064         WRITE32(OP_READDIR);
1065         WRITE64(readdir->cookie);
1066         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1067         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1068         WRITE32(readdir->count);
1069         WRITE32(2);
1070         /* Switch to mounted_on_fileid if the server supports it */
1071         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1072                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1073         else
1074                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1075         WRITE32(attrs[0] & readdir->bitmask[0]);
1076         WRITE32(attrs[1] & readdir->bitmask[1]);
1077         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1078                         __FUNCTION__,
1079                         (unsigned long long)readdir->cookie,
1080                         ((u32 *)readdir->verifier.data)[0],
1081                         ((u32 *)readdir->verifier.data)[1],
1082                         attrs[0] & readdir->bitmask[0],
1083                         attrs[1] & readdir->bitmask[1]);
1084
1085         /* set up reply kvec
1086          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1087          *      + OP_READDIR + status + verifer(2)  = 9
1088          */
1089         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1090         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1091                          readdir->pgbase, readdir->count);
1092         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1093                         __FUNCTION__, replen, readdir->pages,
1094                         readdir->pgbase, readdir->count);
1095
1096         return 0;
1097 }
1098
1099 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1100 {
1101         struct rpc_auth *auth = req->rq_task->tk_auth;
1102         unsigned int replen;
1103         uint32_t *p;
1104
1105         RESERVE_SPACE(4);
1106         WRITE32(OP_READLINK);
1107
1108         /* set up reply kvec
1109          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1110          *      + OP_READLINK + status + string length = 8
1111          */
1112         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1113         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1114                         readlink->pgbase, readlink->pglen);
1115
1116         return 0;
1117 }
1118
1119 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1120 {
1121         uint32_t *p;
1122
1123         RESERVE_SPACE(8 + name->len);
1124         WRITE32(OP_REMOVE);
1125         WRITE32(name->len);
1126         WRITEMEM(name->name, name->len);
1127
1128         return 0;
1129 }
1130
1131 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1132 {
1133         uint32_t *p;
1134
1135         RESERVE_SPACE(8 + oldname->len);
1136         WRITE32(OP_RENAME);
1137         WRITE32(oldname->len);
1138         WRITEMEM(oldname->name, oldname->len);
1139
1140         RESERVE_SPACE(4 + newname->len);
1141         WRITE32(newname->len);
1142         WRITEMEM(newname->name, newname->len);
1143
1144         return 0;
1145 }
1146
1147 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1148 {
1149         uint32_t *p;
1150
1151         RESERVE_SPACE(12);
1152         WRITE32(OP_RENEW);
1153         WRITE64(client_stateid->cl_clientid);
1154
1155         return 0;
1156 }
1157
1158 static int
1159 encode_restorefh(struct xdr_stream *xdr)
1160 {
1161         uint32_t *p;
1162
1163         RESERVE_SPACE(4);
1164         WRITE32(OP_RESTOREFH);
1165
1166         return 0;
1167 }
1168
1169 static int
1170 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1171 {
1172         uint32_t *p;
1173
1174         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1175         WRITE32(OP_SETATTR);
1176         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1177         RESERVE_SPACE(2*4);
1178         WRITE32(1);
1179         WRITE32(FATTR4_WORD0_ACL);
1180         if (arg->acl_len % 4)
1181                 return -EINVAL;
1182         RESERVE_SPACE(4);
1183         WRITE32(arg->acl_len);
1184         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1185         return 0;
1186 }
1187
1188 static int
1189 encode_savefh(struct xdr_stream *xdr)
1190 {
1191         uint32_t *p;
1192
1193         RESERVE_SPACE(4);
1194         WRITE32(OP_SAVEFH);
1195
1196         return 0;
1197 }
1198
1199 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1200 {
1201         int status;
1202         uint32_t *p;
1203
1204         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1205         WRITE32(OP_SETATTR);
1206         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1207
1208         if ((status = encode_attrs(xdr, arg->iap, server)))
1209                 return status;
1210
1211         return 0;
1212 }
1213
1214 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1215 {
1216         uint32_t *p;
1217
1218         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1219         WRITE32(OP_SETCLIENTID);
1220         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1221
1222         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1223         RESERVE_SPACE(4);
1224         WRITE32(setclientid->sc_prog);
1225         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1226         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1227         RESERVE_SPACE(4);
1228         WRITE32(setclientid->sc_cb_ident);
1229
1230         return 0;
1231 }
1232
1233 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1234 {
1235         uint32_t *p;
1236
1237         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1238         WRITE32(OP_SETCLIENTID_CONFIRM);
1239         WRITE64(client_state->cl_clientid);
1240         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1241
1242         return 0;
1243 }
1244
1245 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1246 {
1247         uint32_t *p;
1248
1249         RESERVE_SPACE(4);
1250         WRITE32(OP_WRITE);
1251
1252         encode_stateid(xdr, args->context);
1253
1254         RESERVE_SPACE(16);
1255         WRITE64(args->offset);
1256         WRITE32(args->stable);
1257         WRITE32(args->count);
1258
1259         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1260
1261         return 0;
1262 }
1263
1264 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1265 {
1266         uint32_t *p;
1267
1268         RESERVE_SPACE(20);
1269
1270         WRITE32(OP_DELEGRETURN);
1271         WRITEMEM(stateid->data, sizeof(stateid->data));
1272         return 0;
1273
1274 }
1275 /*
1276  * END OF "GENERIC" ENCODE ROUTINES.
1277  */
1278
1279 /*
1280  * Encode an ACCESS request
1281  */
1282 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1283 {
1284         struct xdr_stream xdr;
1285         struct compound_hdr hdr = {
1286                 .nops = 2,
1287         };
1288         int status;
1289
1290         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1291         encode_compound_hdr(&xdr, &hdr);
1292         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1293                 status = encode_access(&xdr, args->access);
1294         return status;
1295 }
1296
1297 /*
1298  * Encode LOOKUP request
1299  */
1300 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1301 {
1302         struct xdr_stream xdr;
1303         struct compound_hdr hdr = {
1304                 .nops = 4,
1305         };
1306         int status;
1307
1308         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1309         encode_compound_hdr(&xdr, &hdr);
1310         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1311                 goto out;
1312         if ((status = encode_lookup(&xdr, args->name)) != 0)
1313                 goto out;
1314         if ((status = encode_getfh(&xdr)) != 0)
1315                 goto out;
1316         status = encode_getfattr(&xdr, args->bitmask);
1317 out:
1318         return status;
1319 }
1320
1321 /*
1322  * Encode LOOKUP_ROOT request
1323  */
1324 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1325 {
1326         struct xdr_stream xdr;
1327         struct compound_hdr hdr = {
1328                 .nops = 3,
1329         };
1330         int status;
1331
1332         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1333         encode_compound_hdr(&xdr, &hdr);
1334         if ((status = encode_putrootfh(&xdr)) != 0)
1335                 goto out;
1336         if ((status = encode_getfh(&xdr)) == 0)
1337                 status = encode_getfattr(&xdr, args->bitmask);
1338 out:
1339         return status;
1340 }
1341
1342 /*
1343  * Encode REMOVE request
1344  */
1345 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1346 {
1347         struct xdr_stream xdr;
1348         struct compound_hdr hdr = {
1349                 .nops = 3,
1350         };
1351         int status;
1352
1353         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1354         encode_compound_hdr(&xdr, &hdr);
1355         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1356                 goto out;
1357         if ((status = encode_remove(&xdr, args->name)) != 0)
1358                 goto out;
1359         status = encode_getfattr(&xdr, args->bitmask);
1360 out:
1361         return status;
1362 }
1363
1364 /*
1365  * Encode RENAME request
1366  */
1367 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1368 {
1369         struct xdr_stream xdr;
1370         struct compound_hdr hdr = {
1371                 .nops = 7,
1372         };
1373         int status;
1374
1375         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1376         encode_compound_hdr(&xdr, &hdr);
1377         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1378                 goto out;
1379         if ((status = encode_savefh(&xdr)) != 0)
1380                 goto out;
1381         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1382                 goto out;
1383         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1384                 goto out;
1385         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1386                 goto out;
1387         if ((status = encode_restorefh(&xdr)) != 0)
1388                 goto out;
1389         status = encode_getfattr(&xdr, args->bitmask);
1390 out:
1391         return status;
1392 }
1393
1394 /*
1395  * Encode LINK request
1396  */
1397 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1398 {
1399         struct xdr_stream xdr;
1400         struct compound_hdr hdr = {
1401                 .nops = 7,
1402         };
1403         int status;
1404
1405         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1406         encode_compound_hdr(&xdr, &hdr);
1407         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1408                 goto out;
1409         if ((status = encode_savefh(&xdr)) != 0)
1410                 goto out;
1411         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1412                 goto out;
1413         if ((status = encode_link(&xdr, args->name)) != 0)
1414                 goto out;
1415         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1416                 goto out;
1417         if ((status = encode_restorefh(&xdr)) != 0)
1418                 goto out;
1419         status = encode_getfattr(&xdr, args->bitmask);
1420 out:
1421         return status;
1422 }
1423
1424 /*
1425  * Encode CREATE request
1426  */
1427 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1428 {
1429         struct xdr_stream xdr;
1430         struct compound_hdr hdr = {
1431                 .nops = 7,
1432         };
1433         int status;
1434
1435         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1436         encode_compound_hdr(&xdr, &hdr);
1437         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1438                 goto out;
1439         if ((status = encode_savefh(&xdr)) != 0)
1440                 goto out;
1441         if ((status = encode_create(&xdr, args)) != 0)
1442                 goto out;
1443         if ((status = encode_getfh(&xdr)) != 0)
1444                 goto out;
1445         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1446                 goto out;
1447         if ((status = encode_restorefh(&xdr)) != 0)
1448                 goto out;
1449         status = encode_getfattr(&xdr, args->bitmask);
1450 out:
1451         return status;
1452 }
1453
1454 /*
1455  * Encode SYMLINK request
1456  */
1457 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1458 {
1459         return nfs4_xdr_enc_create(req, p, args);
1460 }
1461
1462 /*
1463  * Encode GETATTR request
1464  */
1465 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1466 {
1467         struct xdr_stream xdr;
1468         struct compound_hdr hdr = {
1469                 .nops = 2,
1470         };
1471         int status;
1472
1473         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1474         encode_compound_hdr(&xdr, &hdr);
1475         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1476                 status = encode_getfattr(&xdr, args->bitmask);
1477         return status;
1478 }
1479
1480 /*
1481  * Encode a CLOSE request
1482  */
1483 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1484 {
1485         struct xdr_stream xdr;
1486         struct compound_hdr hdr = {
1487                 .nops   = 3,
1488         };
1489         int status;
1490
1491         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1492         encode_compound_hdr(&xdr, &hdr);
1493         status = encode_putfh(&xdr, args->fh);
1494         if(status)
1495                 goto out;
1496         status = encode_close(&xdr, args);
1497         if (status != 0)
1498                 goto out;
1499         status = encode_getfattr(&xdr, args->bitmask);
1500 out:
1501         return status;
1502 }
1503
1504 /*
1505  * Encode an OPEN request
1506  */
1507 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1508 {
1509         struct xdr_stream xdr;
1510         struct compound_hdr hdr = {
1511                 .nops = 7,
1512         };
1513         int status;
1514
1515         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1516         encode_compound_hdr(&xdr, &hdr);
1517         status = encode_putfh(&xdr, args->fh);
1518         if (status)
1519                 goto out;
1520         status = encode_savefh(&xdr);
1521         if (status)
1522                 goto out;
1523         status = encode_open(&xdr, args);
1524         if (status)
1525                 goto out;
1526         status = encode_getfh(&xdr);
1527         if (status)
1528                 goto out;
1529         status = encode_getfattr(&xdr, args->bitmask);
1530         if (status)
1531                 goto out;
1532         status = encode_restorefh(&xdr);
1533         if (status)
1534                 goto out;
1535         status = encode_getfattr(&xdr, args->bitmask);
1536 out:
1537         return status;
1538 }
1539
1540 /*
1541  * Encode an OPEN_CONFIRM request
1542  */
1543 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1544 {
1545         struct xdr_stream xdr;
1546         struct compound_hdr hdr = {
1547                 .nops   = 2,
1548         };
1549         int status;
1550
1551         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1552         encode_compound_hdr(&xdr, &hdr);
1553         status = encode_putfh(&xdr, args->fh);
1554         if(status)
1555                 goto out;
1556         status = encode_open_confirm(&xdr, args);
1557 out:
1558         return status;
1559 }
1560
1561 /*
1562  * Encode an OPEN request with no attributes.
1563  */
1564 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1565 {
1566         struct xdr_stream xdr;
1567         struct compound_hdr hdr = {
1568                 .nops   = 3,
1569         };
1570         int status;
1571
1572         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1573         encode_compound_hdr(&xdr, &hdr);
1574         status = encode_putfh(&xdr, args->fh);
1575         if (status)
1576                 goto out;
1577         status = encode_open(&xdr, args);
1578         if (status)
1579                 goto out;
1580         status = encode_getfattr(&xdr, args->bitmask);
1581 out:
1582         return status;
1583 }
1584
1585 /*
1586  * Encode an OPEN_DOWNGRADE request
1587  */
1588 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1589 {
1590         struct xdr_stream xdr;
1591         struct compound_hdr hdr = {
1592                 .nops   = 3,
1593         };
1594         int status;
1595
1596         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1597         encode_compound_hdr(&xdr, &hdr);
1598         status = encode_putfh(&xdr, args->fh);
1599         if (status)
1600                 goto out;
1601         status = encode_open_downgrade(&xdr, args);
1602         if (status != 0)
1603                 goto out;
1604         status = encode_getfattr(&xdr, args->bitmask);
1605 out:
1606         return status;
1607 }
1608
1609 /*
1610  * Encode a LOCK request
1611  */
1612 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lock_args *args)
1613 {
1614         struct xdr_stream xdr;
1615         struct compound_hdr hdr = {
1616                 .nops   = 2,
1617         };
1618         int status;
1619
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_lockt_args *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_locku_args *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 = 3,
1989         };
1990         int status;
1991
1992         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1993         encode_compound_hdr(&xdr, &hdr);
1994         status = encode_putfh(&xdr, args->fhandle);
1995         if (status != 0)
1996                 goto out;
1997         status = encode_delegreturn(&xdr, args->stateid);
1998         if (status != 0)
1999                 goto out;
2000         status = encode_getfattr(&xdr, args->bitmask);
2001 out:
2002         return status;
2003 }
2004
2005 /*
2006  * START OF "GENERIC" DECODE ROUTINES.
2007  *   These may look a little ugly since they are imported from a "generic"
2008  * set of XDR encode/decode routines which are intended to be shared by
2009  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2010  *
2011  * If the pain of reading these is too great, it should be a straightforward
2012  * task to translate them into Linux-specific versions which are more
2013  * consistent with the style used in NFSv2/v3...
2014  */
2015 #define READ32(x)         (x) = ntohl(*p++)
2016 #define READ64(x)         do {                  \
2017         (x) = (u64)ntohl(*p++) << 32;           \
2018         (x) |= ntohl(*p++);                     \
2019 } while (0)
2020 #define READTIME(x)       do {                  \
2021         p++;                                    \
2022         (x.tv_sec) = ntohl(*p++);               \
2023         (x.tv_nsec) = ntohl(*p++);              \
2024 } while (0)
2025 #define COPYMEM(x,nbytes) do {                  \
2026         memcpy((x), p, nbytes);                 \
2027         p += XDR_QUADLEN(nbytes);               \
2028 } while (0)
2029
2030 #define READ_BUF(nbytes)  do { \
2031         p = xdr_inline_decode(xdr, nbytes); \
2032         if (!p) { \
2033                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2034                                 __FUNCTION__, __LINE__); \
2035                 return -EIO; \
2036         } \
2037 } while (0)
2038
2039 static int decode_opaque_inline(struct xdr_stream *xdr, uint32_t *len, char **string)
2040 {
2041         uint32_t *p;
2042
2043         READ_BUF(4);
2044         READ32(*len);
2045         READ_BUF(*len);
2046         *string = (char *)p;
2047         return 0;
2048 }
2049
2050 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2051 {
2052         uint32_t *p;
2053
2054         READ_BUF(8);
2055         READ32(hdr->status);
2056         READ32(hdr->taglen);
2057
2058         READ_BUF(hdr->taglen + 4);
2059         hdr->tag = (char *)p;
2060         p += XDR_QUADLEN(hdr->taglen);
2061         READ32(hdr->nops);
2062         return 0;
2063 }
2064
2065 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2066 {
2067         uint32_t *p;
2068         uint32_t opnum;
2069         int32_t nfserr;
2070
2071         READ_BUF(8);
2072         READ32(opnum);
2073         if (opnum != expected) {
2074                 printk(KERN_NOTICE
2075                                 "nfs4_decode_op_hdr: Server returned operation"
2076                                 " %d but we issued a request for %d\n",
2077                                 opnum, expected);
2078                 return -EIO;
2079         }
2080         READ32(nfserr);
2081         if (nfserr != NFS_OK)
2082                 return -nfs_stat_to_errno(nfserr);
2083         return 0;
2084 }
2085
2086 /* Dummy routine */
2087 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2088 {
2089         uint32_t *p;
2090         uint32_t strlen;
2091         char *str;
2092
2093         READ_BUF(12);
2094         return decode_opaque_inline(xdr, &strlen, &str);
2095 }
2096
2097 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2098 {
2099         uint32_t bmlen, *p;
2100
2101         READ_BUF(4);
2102         READ32(bmlen);
2103
2104         bitmap[0] = bitmap[1] = 0;
2105         READ_BUF((bmlen << 2));
2106         if (bmlen > 0) {
2107                 READ32(bitmap[0]);
2108                 if (bmlen > 1)
2109                         READ32(bitmap[1]);
2110         }
2111         return 0;
2112 }
2113
2114 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2115 {
2116         uint32_t *p;
2117
2118         READ_BUF(4);
2119         READ32(*attrlen);
2120         *savep = xdr->p;
2121         return 0;
2122 }
2123
2124 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2125 {
2126         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2127                 decode_attr_bitmap(xdr, bitmask);
2128                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2129         } else
2130                 bitmask[0] = bitmask[1] = 0;
2131         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2132         return 0;
2133 }
2134
2135 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2136 {
2137         uint32_t *p;
2138
2139         *type = 0;
2140         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2141                 return -EIO;
2142         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2143                 READ_BUF(4);
2144                 READ32(*type);
2145                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2146                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2147                         return -EIO;
2148                 }
2149                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2150         }
2151         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2152         return 0;
2153 }
2154
2155 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2156 {
2157         uint32_t *p;
2158
2159         *change = 0;
2160         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2161                 return -EIO;
2162         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2163                 READ_BUF(8);
2164                 READ64(*change);
2165                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2166         }
2167         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2168                         (unsigned long long)*change);
2169         return 0;
2170 }
2171
2172 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2173 {
2174         uint32_t *p;
2175
2176         *size = 0;
2177         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2178                 return -EIO;
2179         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2180                 READ_BUF(8);
2181                 READ64(*size);
2182                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2183         }
2184         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2185         return 0;
2186 }
2187
2188 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2189 {
2190         uint32_t *p;
2191
2192         *res = 0;
2193         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2194                 return -EIO;
2195         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2196                 READ_BUF(4);
2197                 READ32(*res);
2198                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2199         }
2200         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2201         return 0;
2202 }
2203
2204 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2205 {
2206         uint32_t *p;
2207
2208         *res = 0;
2209         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2210                 return -EIO;
2211         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2212                 READ_BUF(4);
2213                 READ32(*res);
2214                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2215         }
2216         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2217         return 0;
2218 }
2219
2220 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fsid *fsid)
2221 {
2222         uint32_t *p;
2223
2224         fsid->major = 0;
2225         fsid->minor = 0;
2226         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2227                 return -EIO;
2228         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2229                 READ_BUF(16);
2230                 READ64(fsid->major);
2231                 READ64(fsid->minor);
2232                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2233         }
2234         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2235                         (unsigned long long)fsid->major,
2236                         (unsigned long long)fsid->minor);
2237         return 0;
2238 }
2239
2240 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2241 {
2242         uint32_t *p;
2243
2244         *res = 60;
2245         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2246                 return -EIO;
2247         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2248                 READ_BUF(4);
2249                 READ32(*res);
2250                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2251         }
2252         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2253         return 0;
2254 }
2255
2256 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2257 {
2258         uint32_t *p;
2259
2260         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2261         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2262                 return -EIO;
2263         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2264                 READ_BUF(4);
2265                 READ32(*res);
2266                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2267         }
2268         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2269         return 0;
2270 }
2271
2272 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2273 {
2274         uint32_t *p;
2275
2276         *fileid = 0;
2277         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2278                 return -EIO;
2279         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2280                 READ_BUF(8);
2281                 READ64(*fileid);
2282                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2283         }
2284         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2285         return 0;
2286 }
2287
2288 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2289 {
2290         uint32_t *p;
2291         int status = 0;
2292
2293         *res = 0;
2294         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2295                 return -EIO;
2296         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2297                 READ_BUF(8);
2298                 READ64(*res);
2299                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2300         }
2301         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2302         return status;
2303 }
2304
2305 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2306 {
2307         uint32_t *p;
2308         int status = 0;
2309
2310         *res = 0;
2311         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2312                 return -EIO;
2313         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2314                 READ_BUF(8);
2315                 READ64(*res);
2316                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2317         }
2318         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2319         return status;
2320 }
2321
2322 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2323 {
2324         uint32_t *p;
2325         int status = 0;
2326
2327         *res = 0;
2328         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2329                 return -EIO;
2330         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2331                 READ_BUF(8);
2332                 READ64(*res);
2333                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2334         }
2335         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2336         return status;
2337 }
2338
2339 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2340 {
2341         uint32_t *p;
2342         int status = 0;
2343
2344         *res = 0;
2345         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2346                 return -EIO;
2347         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2348                 READ_BUF(8);
2349                 READ64(*res);
2350                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2351         }
2352         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2353         return status;
2354 }
2355
2356 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2357 {
2358         uint32_t *p;
2359         int status = 0;
2360
2361         *maxlink = 1;
2362         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2363                 return -EIO;
2364         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2365                 READ_BUF(4);
2366                 READ32(*maxlink);
2367                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2368         }
2369         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2370         return status;
2371 }
2372
2373 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2374 {
2375         uint32_t *p;
2376         int status = 0;
2377
2378         *maxname = 1024;
2379         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2380                 return -EIO;
2381         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2382                 READ_BUF(4);
2383                 READ32(*maxname);
2384                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2385         }
2386         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2387         return status;
2388 }
2389
2390 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2391 {
2392         uint32_t *p;
2393         int status = 0;
2394
2395         *res = 1024;
2396         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2397                 return -EIO;
2398         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2399                 uint64_t maxread;
2400                 READ_BUF(8);
2401                 READ64(maxread);
2402                 if (maxread > 0x7FFFFFFF)
2403                         maxread = 0x7FFFFFFF;
2404                 *res = (uint32_t)maxread;
2405                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2406         }
2407         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2408         return status;
2409 }
2410
2411 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2412 {
2413         uint32_t *p;
2414         int status = 0;
2415
2416         *res = 1024;
2417         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2418                 return -EIO;
2419         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2420                 uint64_t maxwrite;
2421                 READ_BUF(8);
2422                 READ64(maxwrite);
2423                 if (maxwrite > 0x7FFFFFFF)
2424                         maxwrite = 0x7FFFFFFF;
2425                 *res = (uint32_t)maxwrite;
2426                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2427         }
2428         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2429         return status;
2430 }
2431
2432 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2433 {
2434         uint32_t *p;
2435
2436         *mode = 0;
2437         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2438                 return -EIO;
2439         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2440                 READ_BUF(4);
2441                 READ32(*mode);
2442                 *mode &= ~S_IFMT;
2443                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2444         }
2445         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2446         return 0;
2447 }
2448
2449 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2450 {
2451         uint32_t *p;
2452
2453         *nlink = 1;
2454         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2455                 return -EIO;
2456         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2457                 READ_BUF(4);
2458                 READ32(*nlink);
2459                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2460         }
2461         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2462         return 0;
2463 }
2464
2465 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2466 {
2467         uint32_t len, *p;
2468
2469         *uid = -2;
2470         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2471                 return -EIO;
2472         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2473                 READ_BUF(4);
2474                 READ32(len);
2475                 READ_BUF(len);
2476                 if (len < XDR_MAX_NETOBJ) {
2477                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2478                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2479                                                 __FUNCTION__);
2480                 } else
2481                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2482                                         __FUNCTION__, len);
2483                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2484         }
2485         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2486         return 0;
2487 }
2488
2489 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2490 {
2491         uint32_t len, *p;
2492
2493         *gid = -2;
2494         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2495                 return -EIO;
2496         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2497                 READ_BUF(4);
2498                 READ32(len);
2499                 READ_BUF(len);
2500                 if (len < XDR_MAX_NETOBJ) {
2501                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2502                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2503                                                 __FUNCTION__);
2504                 } else
2505                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2506                                         __FUNCTION__, len);
2507                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2508         }
2509         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2510         return 0;
2511 }
2512
2513 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2514 {
2515         uint32_t major = 0, minor = 0, *p;
2516
2517         *rdev = MKDEV(0,0);
2518         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2519                 return -EIO;
2520         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2521                 dev_t tmp;
2522
2523                 READ_BUF(8);
2524                 READ32(major);
2525                 READ32(minor);
2526                 tmp = MKDEV(major, minor);
2527                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2528                         *rdev = tmp;
2529                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2530         }
2531         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2532         return 0;
2533 }
2534
2535 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2536 {
2537         uint32_t *p;
2538         int status = 0;
2539
2540         *res = 0;
2541         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2542                 return -EIO;
2543         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2544                 READ_BUF(8);
2545                 READ64(*res);
2546                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2547         }
2548         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2549         return status;
2550 }
2551
2552 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2553 {
2554         uint32_t *p;
2555         int status = 0;
2556
2557         *res = 0;
2558         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2559                 return -EIO;
2560         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2561                 READ_BUF(8);
2562                 READ64(*res);
2563                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2564         }
2565         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2566         return status;
2567 }
2568
2569 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2570 {
2571         uint32_t *p;
2572         int status = 0;
2573
2574         *res = 0;
2575         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2576                 return -EIO;
2577         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2578                 READ_BUF(8);
2579                 READ64(*res);
2580                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2581         }
2582         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2583         return status;
2584 }
2585
2586 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2587 {
2588         uint32_t *p;
2589
2590         *used = 0;
2591         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2592                 return -EIO;
2593         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2594                 READ_BUF(8);
2595                 READ64(*used);
2596                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2597         }
2598         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2599                         (unsigned long long)*used);
2600         return 0;
2601 }
2602
2603 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2604 {
2605         uint32_t *p;
2606         uint64_t sec;
2607         uint32_t nsec;
2608
2609         READ_BUF(12);
2610         READ64(sec);
2611         READ32(nsec);
2612         time->tv_sec = (time_t)sec;
2613         time->tv_nsec = (long)nsec;
2614         return 0;
2615 }
2616
2617 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2618 {
2619         int status = 0;
2620
2621         time->tv_sec = 0;
2622         time->tv_nsec = 0;
2623         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2624                 return -EIO;
2625         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2626                 status = decode_attr_time(xdr, time);
2627                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2628         }
2629         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2630         return status;
2631 }
2632
2633 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2634 {
2635         int status = 0;
2636
2637         time->tv_sec = 0;
2638         time->tv_nsec = 0;
2639         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2640                 return -EIO;
2641         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2642                 status = decode_attr_time(xdr, time);
2643                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2644         }
2645         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2646         return status;
2647 }
2648
2649 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2650 {
2651         int status = 0;
2652
2653         time->tv_sec = 0;
2654         time->tv_nsec = 0;
2655         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2656                 return -EIO;
2657         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2658                 status = decode_attr_time(xdr, time);
2659                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2660         }
2661         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2662         return status;
2663 }
2664
2665 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2666 {
2667         unsigned int attrwords = XDR_QUADLEN(attrlen);
2668         unsigned int nwords = xdr->p - savep;
2669
2670         if (unlikely(attrwords != nwords)) {
2671                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2672                                 __FUNCTION__,
2673                                 attrwords << 2,
2674                                 (attrwords < nwords) ? '<' : '>',
2675                                 nwords << 2);
2676                 return -EIO;
2677         }
2678         return 0;
2679 }
2680
2681 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2682 {
2683         uint32_t *p;
2684
2685         READ_BUF(20);
2686         READ32(cinfo->atomic);
2687         READ64(cinfo->before);
2688         READ64(cinfo->after);
2689         return 0;
2690 }
2691
2692 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2693 {
2694         uint32_t *p;
2695         uint32_t supp, acc;
2696         int status;
2697
2698         status = decode_op_hdr(xdr, OP_ACCESS);
2699         if (status)
2700                 return status;
2701         READ_BUF(8);
2702         READ32(supp);
2703         READ32(acc);
2704         access->supported = supp;
2705         access->access = acc;
2706         return 0;
2707 }
2708
2709 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2710 {
2711         uint32_t *p;
2712         int status;
2713
2714         status = decode_op_hdr(xdr, OP_CLOSE);
2715         if (status)
2716                 return status;
2717         READ_BUF(sizeof(res->stateid.data));
2718         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2719         return 0;
2720 }
2721
2722 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2723 {
2724         uint32_t *p;
2725         int status;
2726
2727         status = decode_op_hdr(xdr, OP_COMMIT);
2728         if (status)
2729                 return status;
2730         READ_BUF(8);
2731         COPYMEM(res->verf->verifier, 8);
2732         return 0;
2733 }
2734
2735 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2736 {
2737         uint32_t *p;
2738         uint32_t bmlen;
2739         int status;
2740
2741         status = decode_op_hdr(xdr, OP_CREATE);
2742         if (status)
2743                 return status;
2744         if ((status = decode_change_info(xdr, cinfo)))
2745                 return status;
2746         READ_BUF(4);
2747         READ32(bmlen);
2748         READ_BUF(bmlen << 2);
2749         return 0;
2750 }
2751
2752 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2753 {
2754         uint32_t *savep;
2755         uint32_t attrlen,
2756                  bitmap[2] = {0};
2757         int status;
2758
2759         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2760                 goto xdr_error;
2761         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2762                 goto xdr_error;
2763         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2764                 goto xdr_error;
2765         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2766                 goto xdr_error;
2767         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2768                 goto xdr_error;
2769         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2770                 goto xdr_error;
2771         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2772                 goto xdr_error;
2773         status = verify_attr_len(xdr, savep, attrlen);
2774 xdr_error:
2775         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2776         return status;
2777 }
2778
2779 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2780 {
2781         uint32_t *savep;
2782         uint32_t attrlen,
2783                  bitmap[2] = {0};
2784         int status;
2785
2786         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2787                 goto xdr_error;
2788         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2789                 goto xdr_error;
2790         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2791                 goto xdr_error;
2792
2793         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2794                 goto xdr_error;
2795         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2796                 goto xdr_error;
2797         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2798                 goto xdr_error;
2799         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2800                 goto xdr_error;
2801         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2802                 goto xdr_error;
2803         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2804                 goto xdr_error;
2805
2806         status = verify_attr_len(xdr, savep, attrlen);
2807 xdr_error:
2808         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2809         return status;
2810 }
2811
2812 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2813 {
2814         uint32_t *savep;
2815         uint32_t attrlen,
2816                  bitmap[2] = {0};
2817         int status;
2818
2819         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2820                 goto xdr_error;
2821         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2822                 goto xdr_error;
2823         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2824                 goto xdr_error;
2825
2826         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2827                 goto xdr_error;
2828         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2829                 goto xdr_error;
2830
2831         status = verify_attr_len(xdr, savep, attrlen);
2832 xdr_error:
2833         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2834         return status;
2835 }
2836
2837 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2838 {
2839         uint32_t *savep;
2840         uint32_t attrlen,
2841                  bitmap[2] = {0},
2842                  type;
2843         int status, fmode = 0;
2844
2845         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2846                 goto xdr_error;
2847         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2848                 goto xdr_error;
2849
2850         fattr->bitmap[0] = bitmap[0];
2851         fattr->bitmap[1] = bitmap[1];
2852
2853         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2854                 goto xdr_error;
2855
2856
2857         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2858                 goto xdr_error;
2859         fattr->type = nfs_type2fmt[type].nfs2type;
2860         fmode = nfs_type2fmt[type].mode;
2861
2862         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2863                 goto xdr_error;
2864         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2865                 goto xdr_error;
2866         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid_u.nfs4)) != 0)
2867                 goto xdr_error;
2868         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2869                 goto xdr_error;
2870         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2871                 goto xdr_error;
2872         fattr->mode |= fmode;
2873         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2876                 goto xdr_error;
2877         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2878                 goto xdr_error;
2879         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2880                 goto xdr_error;
2881         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2882                 goto xdr_error;
2883         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2884                 goto xdr_error;
2885         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2886                 goto xdr_error;
2887         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2888                 goto xdr_error;
2889         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2890                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2891 xdr_error:
2892         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2893         return status;
2894 }
2895
2896
2897 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2898 {
2899         uint32_t *savep;
2900         uint32_t attrlen, bitmap[2];
2901         int status;
2902
2903         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2904                 goto xdr_error;
2905         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2906                 goto xdr_error;
2907         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2908                 goto xdr_error;
2909
2910         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2911
2912         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2913                 goto xdr_error;
2914         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2915                 goto xdr_error;
2916         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
2917                 goto xdr_error;
2918         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
2919         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
2920                 goto xdr_error;
2921         fsinfo->wtpref = fsinfo->wtmax;
2922
2923         status = verify_attr_len(xdr, savep, attrlen);
2924 xdr_error:
2925         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2926         return status;
2927 }
2928
2929 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
2930 {
2931         uint32_t *p;
2932         uint32_t len;
2933         int status;
2934
2935         status = decode_op_hdr(xdr, OP_GETFH);
2936         if (status)
2937                 return status;
2938         /* Zero handle first to allow comparisons */
2939         memset(fh, 0, sizeof(*fh));
2940
2941         READ_BUF(4);
2942         READ32(len);
2943         if (len > NFS4_FHSIZE)
2944                 return -EIO;
2945         fh->size = len;
2946         READ_BUF(len);
2947         COPYMEM(fh->data, len);
2948         return 0;
2949 }
2950
2951 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2952 {
2953         int status;
2954
2955         status = decode_op_hdr(xdr, OP_LINK);
2956         if (status)
2957                 return status;
2958         return decode_change_info(xdr, cinfo);
2959 }
2960
2961 /*
2962  * We create the owner, so we know a proper owner.id length is 4.
2963  */
2964 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
2965 {
2966         uint64_t offset, length, clientid;
2967         uint32_t *p;
2968         uint32_t namelen, type;
2969
2970         READ_BUF(32);
2971         READ64(offset);
2972         READ64(length);
2973         READ32(type);
2974         if (fl != NULL) {
2975                 fl->fl_start = (loff_t)offset;
2976                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
2977                 if (length == ~(uint64_t)0)
2978                         fl->fl_end = OFFSET_MAX;
2979                 fl->fl_type = F_WRLCK;
2980                 if (type & 1)
2981                         fl->fl_type = F_RDLCK;
2982                 fl->fl_pid = 0;
2983         }
2984         READ64(clientid);
2985         READ32(namelen);
2986         READ_BUF(namelen);
2987         return -NFS4ERR_DENIED;
2988 }
2989
2990 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
2991 {
2992         uint32_t *p;
2993         int status;
2994
2995         status = decode_op_hdr(xdr, OP_LOCK);
2996         if (status == 0) {
2997                 READ_BUF(sizeof(res->stateid.data));
2998                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2999         } else if (status == -NFS4ERR_DENIED)
3000                 return decode_lock_denied(xdr, NULL);
3001         return status;
3002 }
3003
3004 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3005 {
3006         int status;
3007         status = decode_op_hdr(xdr, OP_LOCKT);
3008         if (status == -NFS4ERR_DENIED)
3009                 return decode_lock_denied(xdr, res->denied);
3010         return status;
3011 }
3012
3013 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3014 {
3015         uint32_t *p;
3016         int status;
3017
3018         status = decode_op_hdr(xdr, OP_LOCKU);
3019         if (status == 0) {
3020                 READ_BUF(sizeof(res->stateid.data));
3021                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3022         }
3023         return status;
3024 }
3025
3026 static int decode_lookup(struct xdr_stream *xdr)
3027 {
3028         return decode_op_hdr(xdr, OP_LOOKUP);
3029 }
3030
3031 /* This is too sick! */
3032 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3033 {
3034         uint32_t *p;
3035         uint32_t limit_type, nblocks, blocksize;
3036
3037         READ_BUF(12);
3038         READ32(limit_type);
3039         switch (limit_type) {
3040                 case 1:
3041                         READ64(*maxsize);
3042                         break;
3043                 case 2:
3044                         READ32(nblocks);
3045                         READ32(blocksize);
3046                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3047         }
3048         return 0;
3049 }
3050
3051 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3052 {
3053         uint32_t *p;
3054         uint32_t delegation_type;
3055
3056         READ_BUF(4);
3057         READ32(delegation_type);
3058         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3059                 res->delegation_type = 0;
3060                 return 0;
3061         }
3062         READ_BUF(20);
3063         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3064         READ32(res->do_recall);
3065         switch (delegation_type) {
3066                 case NFS4_OPEN_DELEGATE_READ:
3067                         res->delegation_type = FMODE_READ;
3068                         break;
3069                 case NFS4_OPEN_DELEGATE_WRITE:
3070                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3071                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3072                                 return -EIO;
3073         }
3074         return decode_ace(xdr, NULL, res->server->nfs4_state);
3075 }
3076
3077 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3078 {
3079         uint32_t *p;
3080         uint32_t bmlen;
3081         int status;
3082
3083         status = decode_op_hdr(xdr, OP_OPEN);
3084         if (status)
3085                 return status;
3086         READ_BUF(sizeof(res->stateid.data));
3087         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3088
3089         decode_change_info(xdr, &res->cinfo);
3090
3091         READ_BUF(8);
3092         READ32(res->rflags);
3093         READ32(bmlen);
3094         if (bmlen > 10)
3095                 goto xdr_error;
3096
3097         READ_BUF(bmlen << 2);
3098         p += bmlen;
3099         return decode_delegation(xdr, res);
3100 xdr_error:
3101         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3102         return -EIO;
3103 }
3104
3105 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3106 {
3107         uint32_t *p;
3108         int status;
3109
3110         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3111         if (status)
3112                 return status;
3113         READ_BUF(sizeof(res->stateid.data));
3114         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3115         return 0;
3116 }
3117
3118 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3119 {
3120         uint32_t *p;
3121         int status;
3122
3123         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3124         if (status)
3125                 return status;
3126         READ_BUF(sizeof(res->stateid.data));
3127         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3128         return 0;
3129 }
3130
3131 static int decode_putfh(struct xdr_stream *xdr)
3132 {
3133         return decode_op_hdr(xdr, OP_PUTFH);
3134 }
3135
3136 static int decode_putrootfh(struct xdr_stream *xdr)
3137 {
3138         return decode_op_hdr(xdr, OP_PUTROOTFH);
3139 }
3140
3141 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3142 {
3143         struct kvec *iov = req->rq_rcv_buf.head;
3144         uint32_t *p;
3145         uint32_t count, eof, recvd, hdrlen;
3146         int status;
3147
3148         status = decode_op_hdr(xdr, OP_READ);
3149         if (status)
3150                 return status;
3151         READ_BUF(8);
3152         READ32(eof);
3153         READ32(count);
3154         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3155         recvd = req->rq_rcv_buf.len - hdrlen;
3156         if (count > recvd) {
3157                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3158                                 "count %u > recvd %u\n", count, recvd);
3159                 count = recvd;
3160                 eof = 0;
3161         }
3162         xdr_read_pages(xdr, count);
3163         res->eof = eof;
3164         res->count = count;
3165         return 0;
3166 }
3167
3168 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3169 {
3170         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3171         struct page     *page = *rcvbuf->pages;
3172         struct kvec     *iov = rcvbuf->head;
3173         unsigned int    nr, pglen = rcvbuf->page_len;
3174         uint32_t        *end, *entry, *p, *kaddr;
3175         uint32_t        len, attrlen;
3176         int             hdrlen, recvd, status;
3177
3178         status = decode_op_hdr(xdr, OP_READDIR);
3179         if (status)
3180                 return status;
3181         READ_BUF(8);
3182         COPYMEM(readdir->verifier.data, 8);
3183         dprintk("%s: verifier = 0x%x%x\n",
3184                         __FUNCTION__,
3185                         ((u32 *)readdir->verifier.data)[0],
3186                         ((u32 *)readdir->verifier.data)[1]);
3187
3188
3189         hdrlen = (char *) p - (char *) iov->iov_base;
3190         recvd = rcvbuf->len - hdrlen;
3191         if (pglen > recvd)
3192                 pglen = recvd;
3193         xdr_read_pages(xdr, pglen);
3194
3195         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3196         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3197         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3198         entry = p;
3199         for (nr = 0; *p++; nr++) {
3200                 if (p + 3 > end)
3201                         goto short_pkt;
3202                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3203                 p += 2;                 /* cookie */
3204                 len = ntohl(*p++);      /* filename length */
3205                 if (len > NFS4_MAXNAMLEN) {
3206                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3207                         goto err_unmap;
3208                 }
3209                 dprintk("filename = %*s\n", len, (char *)p);
3210                 p += XDR_QUADLEN(len);
3211                 if (p + 1 > end)
3212                         goto short_pkt;
3213                 len = ntohl(*p++);      /* bitmap length */
3214                 p += len;
3215                 if (p + 1 > end)
3216                         goto short_pkt;
3217                 attrlen = XDR_QUADLEN(ntohl(*p++));
3218                 p += attrlen;           /* attributes */
3219                 if (p + 2 > end)
3220                         goto short_pkt;
3221                 entry = p;
3222         }
3223         if (!nr && (entry[0] != 0 || entry[1] == 0))
3224                 goto short_pkt;
3225 out:
3226         kunmap_atomic(kaddr, KM_USER0);
3227         return 0;
3228 short_pkt:
3229         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3230         entry[0] = entry[1] = 0;
3231         /* truncate listing ? */
3232         if (!nr) {
3233                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3234                 entry[1] = 1;
3235         }
3236         goto out;
3237 err_unmap:
3238         kunmap_atomic(kaddr, KM_USER0);
3239         return -errno_NFSERR_IO;
3240 }
3241
3242 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3243 {
3244         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3245         struct kvec *iov = rcvbuf->head;
3246         int hdrlen, len, recvd;
3247         uint32_t *p;
3248         char *kaddr;
3249         int status;
3250
3251         status = decode_op_hdr(xdr, OP_READLINK);
3252         if (status)
3253                 return status;
3254
3255         /* Convert length of symlink */
3256         READ_BUF(4);
3257         READ32(len);
3258         if (len >= rcvbuf->page_len || len <= 0) {
3259                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3260                 return -ENAMETOOLONG;
3261         }
3262         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3263         recvd = req->rq_rcv_buf.len - hdrlen;
3264         if (recvd < len) {
3265                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3266                                 "count %u > recvd %u\n", len, recvd);
3267                 return -EIO;
3268         }
3269         xdr_read_pages(xdr, len);
3270         /*
3271          * The XDR encode routine has set things up so that
3272          * the link text will be copied directly into the
3273          * buffer.  We just have to do overflow-checking,
3274          * and and null-terminate the text (the VFS expects
3275          * null-termination).
3276          */
3277         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3278         kaddr[len+rcvbuf->page_base] = '\0';
3279         kunmap_atomic(kaddr, KM_USER0);
3280         return 0;
3281 }
3282
3283 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3284 {
3285         int status;
3286
3287         status = decode_op_hdr(xdr, OP_REMOVE);
3288         if (status)
3289                 goto out;
3290         status = decode_change_info(xdr, cinfo);
3291 out:
3292         return status;
3293 }
3294
3295 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3296               struct nfs4_change_info *new_cinfo)
3297 {
3298         int status;
3299
3300         status = decode_op_hdr(xdr, OP_RENAME);
3301         if (status)
3302                 goto out;
3303         if ((status = decode_change_info(xdr, old_cinfo)))
3304                 goto out;
3305         status = decode_change_info(xdr, new_cinfo);
3306 out:
3307         return status;
3308 }
3309
3310 static int decode_renew(struct xdr_stream *xdr)
3311 {
3312         return decode_op_hdr(xdr, OP_RENEW);
3313 }
3314
3315 static int
3316 decode_restorefh(struct xdr_stream *xdr)
3317 {
3318         return decode_op_hdr(xdr, OP_RESTOREFH);
3319 }
3320
3321 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3322                 size_t *acl_len)
3323 {
3324         uint32_t *savep;
3325         uint32_t attrlen,
3326                  bitmap[2] = {0};
3327         struct kvec *iov = req->rq_rcv_buf.head;
3328         int status;
3329
3330         *acl_len = 0;
3331         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3332                 goto out;
3333         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3334                 goto out;
3335         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3336                 goto out;
3337
3338         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3339                 return -EIO;
3340         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3341                 int hdrlen, recvd;
3342
3343                 /* We ignore &savep and don't do consistency checks on
3344                  * the attr length.  Let userspace figure it out.... */
3345                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3346                 recvd = req->rq_rcv_buf.len - hdrlen;
3347                 if (attrlen > recvd) {
3348                         printk(KERN_WARNING "NFS: server cheating in getattr"
3349                                         " acl reply: attrlen %u > recvd %u\n",
3350                                         attrlen, recvd);
3351                         return -EINVAL;
3352                 }
3353                 if (attrlen <= *acl_len)
3354                         xdr_read_pages(xdr, attrlen);
3355                 *acl_len = attrlen;
3356         } else
3357                 status = -EOPNOTSUPP;
3358
3359 out:
3360         return status;
3361 }
3362
3363 static int
3364 decode_savefh(struct xdr_stream *xdr)
3365 {
3366         return decode_op_hdr(xdr, OP_SAVEFH);
3367 }
3368
3369 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3370 {
3371         uint32_t *p;
3372         uint32_t bmlen;
3373         int status;
3374
3375
3376         status = decode_op_hdr(xdr, OP_SETATTR);
3377         if (status)
3378                 return status;
3379         READ_BUF(4);
3380         READ32(bmlen);
3381         READ_BUF(bmlen << 2);
3382         return 0;
3383 }
3384
3385 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3386 {
3387         uint32_t *p;
3388         uint32_t opnum;
3389         int32_t nfserr;
3390
3391         READ_BUF(8);
3392         READ32(opnum);
3393         if (opnum != OP_SETCLIENTID) {
3394                 printk(KERN_NOTICE
3395                                 "nfs4_decode_setclientid: Server returned operation"
3396                                 " %d\n", opnum);
3397                 return -EIO;
3398         }
3399         READ32(nfserr);
3400         if (nfserr == NFS_OK) {
3401                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3402                 READ64(clp->cl_clientid);
3403                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3404         } else if (nfserr == NFSERR_CLID_INUSE) {
3405                 uint32_t len;
3406
3407                 /* skip netid string */
3408                 READ_BUF(4);
3409                 READ32(len);
3410                 READ_BUF(len);
3411
3412                 /* skip uaddr string */
3413                 READ_BUF(4);
3414                 READ32(len);
3415                 READ_BUF(len);
3416                 return -NFSERR_CLID_INUSE;
3417         } else
3418                 return -nfs_stat_to_errno(nfserr);
3419
3420         return 0;
3421 }
3422
3423 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3424 {
3425         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3426 }
3427
3428 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3429 {
3430         uint32_t *p;
3431         int status;
3432
3433         status = decode_op_hdr(xdr, OP_WRITE);
3434         if (status)
3435                 return status;
3436
3437         READ_BUF(16);
3438         READ32(res->count);
3439         READ32(res->verf->committed);
3440         COPYMEM(res->verf->verifier, 8);
3441         return 0;
3442 }
3443
3444 static int decode_delegreturn(struct xdr_stream *xdr)
3445 {
3446         return decode_op_hdr(xdr, OP_DELEGRETURN);
3447 }
3448
3449 /*
3450  * Decode OPEN_DOWNGRADE response
3451  */
3452 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3453 {
3454         struct xdr_stream xdr;
3455         struct compound_hdr hdr;
3456         int status;
3457
3458         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3459         status = decode_compound_hdr(&xdr, &hdr);
3460         if (status)
3461                 goto out;
3462         status = decode_putfh(&xdr);
3463         if (status)
3464                 goto out;
3465         status = decode_open_downgrade(&xdr, res);
3466         if (status != 0)
3467                 goto out;
3468         decode_getfattr(&xdr, res->fattr, res->server);
3469 out:
3470         return status;
3471 }
3472
3473 /*
3474  * END OF "GENERIC" DECODE ROUTINES.
3475  */
3476
3477 /*
3478  * Decode ACCESS response
3479  */
3480 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3481 {
3482         struct xdr_stream xdr;
3483         struct compound_hdr hdr;
3484         int status;
3485
3486         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3487         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3488                 goto out;
3489         if ((status = decode_putfh(&xdr)) == 0)
3490                 status = decode_access(&xdr, res);
3491 out:
3492         return status;
3493 }
3494
3495 /*
3496  * Decode LOOKUP response
3497  */
3498 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3499 {
3500         struct xdr_stream xdr;
3501         struct compound_hdr hdr;
3502         int status;
3503
3504         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3505         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3506                 goto out;
3507         if ((status = decode_putfh(&xdr)) != 0)
3508                 goto out;
3509         if ((status = decode_lookup(&xdr)) != 0)
3510                 goto out;
3511         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3512                 goto out;
3513         status = decode_getfattr(&xdr, res->fattr, res->server);
3514 out:
3515         return status;
3516 }
3517
3518 /*
3519  * Decode LOOKUP_ROOT response
3520  */
3521 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3522 {
3523         struct xdr_stream xdr;
3524         struct compound_hdr hdr;
3525         int status;
3526
3527         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3528         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3529                 goto out;
3530         if ((status = decode_putrootfh(&xdr)) != 0)
3531                 goto out;
3532         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3533                 status = decode_getfattr(&xdr, res->fattr, res->server);
3534 out:
3535         return status;
3536 }
3537
3538 /*
3539  * Decode REMOVE response
3540  */
3541 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3542 {
3543         struct xdr_stream xdr;
3544         struct compound_hdr hdr;
3545         int status;
3546
3547         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3548         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3549                 goto out;
3550         if ((status = decode_putfh(&xdr)) != 0)
3551                 goto out;
3552         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3553                 goto out;
3554         decode_getfattr(&xdr, res->dir_attr, res->server);
3555 out:
3556         return status;
3557 }
3558
3559 /*
3560  * Decode RENAME response
3561  */
3562 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3563 {
3564         struct xdr_stream xdr;
3565         struct compound_hdr hdr;
3566         int status;
3567
3568         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3569         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3570                 goto out;
3571         if ((status = decode_putfh(&xdr)) != 0)
3572                 goto out;
3573         if ((status = decode_savefh(&xdr)) != 0)
3574                 goto out;
3575         if ((status = decode_putfh(&xdr)) != 0)
3576                 goto out;
3577         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3578                 goto out;
3579         /* Current FH is target directory */
3580         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3581                 goto out;
3582         if ((status = decode_restorefh(&xdr)) != 0)
3583                 goto out;
3584         decode_getfattr(&xdr, res->old_fattr, res->server);
3585 out:
3586         return status;
3587 }
3588
3589 /*
3590  * Decode LINK response
3591  */
3592 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3593 {
3594         struct xdr_stream xdr;
3595         struct compound_hdr hdr;
3596         int status;
3597
3598         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3599         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3600                 goto out;
3601         if ((status = decode_putfh(&xdr)) != 0)
3602                 goto out;
3603         if ((status = decode_savefh(&xdr)) != 0)
3604                 goto out;
3605         if ((status = decode_putfh(&xdr)) != 0)
3606                 goto out;
3607         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3608                 goto out;
3609         /*
3610          * Note order: OP_LINK leaves the directory as the current
3611          *             filehandle.
3612          */
3613         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3614                 goto out;
3615         if ((status = decode_restorefh(&xdr)) != 0)
3616                 goto out;
3617         decode_getfattr(&xdr, res->fattr, res->server);
3618 out:
3619         return status;
3620 }
3621
3622 /*
3623  * Decode CREATE response
3624  */
3625 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3626 {
3627         struct xdr_stream xdr;
3628         struct compound_hdr hdr;
3629         int status;
3630
3631         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3632         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3633                 goto out;
3634         if ((status = decode_putfh(&xdr)) != 0)
3635                 goto out;
3636         if ((status = decode_savefh(&xdr)) != 0)
3637                 goto out;
3638         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3639                 goto out;
3640         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3641                 goto out;
3642         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3643                 goto out;
3644         if ((status = decode_restorefh(&xdr)) != 0)
3645                 goto out;
3646         decode_getfattr(&xdr, res->dir_fattr, res->server);
3647 out:
3648         return status;
3649 }
3650
3651 /*
3652  * Decode SYMLINK response
3653  */
3654 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3655 {
3656         return nfs4_xdr_dec_create(rqstp, p, res);
3657 }
3658
3659 /*
3660  * Decode GETATTR response
3661  */
3662 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3663 {
3664         struct xdr_stream xdr;
3665         struct compound_hdr hdr;
3666         int status;
3667
3668         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3669         status = decode_compound_hdr(&xdr, &hdr);
3670         if (status)
3671                 goto out;
3672         status = decode_putfh(&xdr);
3673         if (status)
3674                 goto out;
3675         status = decode_getfattr(&xdr, res->fattr, res->server);
3676 out:
3677         return status;
3678
3679 }
3680
3681 /*
3682  * Encode an SETACL request
3683  */
3684 static int
3685 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3686 {
3687         struct xdr_stream xdr;
3688         struct compound_hdr hdr = {
3689                 .nops   = 2,
3690         };
3691         int status;
3692
3693         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3694         encode_compound_hdr(&xdr, &hdr);
3695         status = encode_putfh(&xdr, args->fh);
3696         if (status)
3697                 goto out;
3698         status = encode_setacl(&xdr, args);
3699 out:
3700         return status;
3701 }
3702 /*
3703  * Decode SETACL response
3704  */
3705 static int
3706 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3707 {
3708         struct xdr_stream xdr;
3709         struct compound_hdr hdr;
3710         int status;
3711
3712         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3713         status = decode_compound_hdr(&xdr, &hdr);
3714         if (status)
3715                 goto out;
3716         status = decode_putfh(&xdr);
3717         if (status)
3718                 goto out;
3719         status = decode_setattr(&xdr, res);
3720 out:
3721         return status;
3722 }
3723
3724 /*
3725  * Decode GETACL response
3726  */
3727 static int
3728 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3729 {
3730         struct xdr_stream xdr;
3731         struct compound_hdr hdr;
3732         int status;
3733
3734         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3735         status = decode_compound_hdr(&xdr, &hdr);
3736         if (status)
3737                 goto out;
3738         status = decode_putfh(&xdr);
3739         if (status)
3740                 goto out;
3741         status = decode_getacl(&xdr, rqstp, acl_len);
3742
3743 out:
3744         return status;
3745 }
3746
3747 /*
3748  * Decode CLOSE response
3749  */
3750 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3751 {
3752         struct xdr_stream xdr;
3753         struct compound_hdr hdr;
3754         int status;
3755
3756         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3757         status = decode_compound_hdr(&xdr, &hdr);
3758         if (status)
3759                 goto out;
3760         status = decode_putfh(&xdr);
3761         if (status)
3762                 goto out;
3763         status = decode_close(&xdr, res);
3764         if (status != 0)
3765                 goto out;
3766         /*
3767          * Note: Server may do delete on close for this file
3768          *      in which case the getattr call will fail with
3769          *      an ESTALE error. Shouldn't be a problem,
3770          *      though, since fattr->valid will remain unset.
3771          */
3772         decode_getfattr(&xdr, res->fattr, res->server);
3773 out:
3774         return status;
3775 }
3776
3777 /*
3778  * Decode OPEN response
3779  */
3780 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3781 {
3782         struct xdr_stream xdr;
3783         struct compound_hdr hdr;
3784         int status;
3785
3786         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3787         status = decode_compound_hdr(&xdr, &hdr);
3788         if (status)
3789                 goto out;
3790         status = decode_putfh(&xdr);
3791         if (status)
3792                 goto out;
3793         status = decode_savefh(&xdr);
3794         if (status)
3795                 goto out;
3796         status = decode_open(&xdr, res);
3797         if (status)
3798                 goto out;
3799         status = decode_getfh(&xdr, &res->fh);
3800         if (status)
3801                 goto out;
3802         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3803                 goto out;
3804         if ((status = decode_restorefh(&xdr)) != 0)
3805                 goto out;
3806         decode_getfattr(&xdr, res->dir_attr, res->server);
3807 out:
3808         return status;
3809 }
3810
3811 /*
3812  * Decode OPEN_CONFIRM response
3813  */
3814 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3815 {
3816         struct xdr_stream xdr;
3817         struct compound_hdr hdr;
3818         int status;
3819
3820         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3821         status = decode_compound_hdr(&xdr, &hdr);
3822         if (status)
3823                 goto out;
3824         status = decode_putfh(&xdr);
3825         if (status)
3826                 goto out;
3827         status = decode_open_confirm(&xdr, res);
3828 out:
3829         return status;
3830 }
3831
3832 /*
3833  * Decode OPEN response
3834  */
3835 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3836 {
3837         struct xdr_stream xdr;
3838         struct compound_hdr hdr;
3839         int status;
3840
3841         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3842         status = decode_compound_hdr(&xdr, &hdr);
3843         if (status)
3844                 goto out;
3845         status = decode_putfh(&xdr);
3846         if (status)
3847                 goto out;
3848         status = decode_open(&xdr, res);
3849         if (status)
3850                 goto out;
3851         decode_getfattr(&xdr, res->f_attr, res->server);
3852 out:
3853         return status;
3854 }
3855
3856 /*
3857  * Decode SETATTR response
3858  */
3859 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3860 {
3861         struct xdr_stream xdr;
3862         struct compound_hdr hdr;
3863         int status;
3864
3865         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3866         status = decode_compound_hdr(&xdr, &hdr);
3867         if (status)
3868                 goto out;
3869         status = decode_putfh(&xdr);
3870         if (status)
3871                 goto out;
3872         status = decode_setattr(&xdr, res);
3873         if (status)
3874                 goto out;
3875         status = decode_getfattr(&xdr, res->fattr, res->server);
3876         if (status == NFS4ERR_DELAY)
3877                 status = 0;
3878 out:
3879         return status;
3880 }
3881
3882 /*
3883  * Decode LOCK response
3884  */
3885 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lock_res *res)
3886 {
3887         struct xdr_stream xdr;
3888         struct compound_hdr hdr;
3889         int status;
3890
3891         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3892         status = decode_compound_hdr(&xdr, &hdr);
3893         if (status)
3894                 goto out;
3895         status = decode_putfh(&xdr);
3896         if (status)
3897                 goto out;
3898         status = decode_lock(&xdr, res);
3899 out:
3900         return status;
3901 }
3902
3903 /*
3904  * Decode LOCKT response
3905  */
3906 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockt_res *res)
3907 {
3908         struct xdr_stream xdr;
3909         struct compound_hdr hdr;
3910         int status;
3911
3912         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3913         status = decode_compound_hdr(&xdr, &hdr);
3914         if (status)
3915                 goto out;
3916         status = decode_putfh(&xdr);
3917         if (status)
3918                 goto out;
3919         status = decode_lockt(&xdr, res);
3920 out:
3921         return status;
3922 }
3923
3924 /*
3925  * Decode LOCKU response
3926  */
3927 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_locku_res *res)
3928 {
3929         struct xdr_stream xdr;
3930         struct compound_hdr hdr;
3931         int status;
3932
3933         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3934         status = decode_compound_hdr(&xdr, &hdr);
3935         if (status)
3936                 goto out;
3937         status = decode_putfh(&xdr);
3938         if (status)
3939                 goto out;
3940         status = decode_locku(&xdr, res);
3941 out:
3942         return status;
3943 }
3944
3945 /*
3946  * Decode READLINK response
3947  */
3948 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3949 {
3950         struct xdr_stream xdr;
3951         struct compound_hdr hdr;
3952         int status;
3953
3954         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3955         status = decode_compound_hdr(&xdr, &hdr);
3956         if (status)
3957                 goto out;
3958         status = decode_putfh(&xdr);
3959         if (status)
3960                 goto out;
3961         status = decode_readlink(&xdr, rqstp);
3962 out:
3963         return status;
3964 }
3965
3966 /*
3967  * Decode READDIR response
3968  */
3969 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
3970 {
3971         struct xdr_stream xdr;
3972         struct compound_hdr hdr;
3973         int status;
3974
3975         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3976         status = decode_compound_hdr(&xdr, &hdr);
3977         if (status)
3978                 goto out;
3979         status = decode_putfh(&xdr);
3980         if (status)
3981                 goto out;
3982         status = decode_readdir(&xdr, rqstp, res);
3983 out:
3984         return status;
3985 }
3986
3987 /*
3988  * Decode Read response
3989  */
3990 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
3991 {
3992         struct xdr_stream xdr;
3993         struct compound_hdr hdr;
3994         int status;
3995
3996         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3997         status = decode_compound_hdr(&xdr, &hdr);
3998         if (status)
3999                 goto out;
4000         status = decode_putfh(&xdr);
4001         if (status)
4002                 goto out;
4003         status = decode_read(&xdr, rqstp, res);
4004         if (!status)
4005                 status = res->count;
4006 out:
4007         return status;
4008 }
4009
4010 /*
4011  * Decode WRITE response
4012  */
4013 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4014 {
4015         struct xdr_stream xdr;
4016         struct compound_hdr hdr;
4017         int status;
4018
4019         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4020         status = decode_compound_hdr(&xdr, &hdr);
4021         if (status)
4022                 goto out;
4023         status = decode_putfh(&xdr);
4024         if (status)
4025                 goto out;
4026         status = decode_write(&xdr, res);
4027         if (status)
4028                 goto out;
4029         decode_getfattr(&xdr, res->fattr, res->server);
4030         if (!status)
4031                 status = res->count;
4032 out:
4033         return status;
4034 }
4035
4036 /*
4037  * Decode COMMIT response
4038  */
4039 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4040 {
4041         struct xdr_stream xdr;
4042         struct compound_hdr hdr;
4043         int status;
4044
4045         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4046         status = decode_compound_hdr(&xdr, &hdr);
4047         if (status)
4048                 goto out;
4049         status = decode_putfh(&xdr);
4050         if (status)
4051                 goto out;
4052         status = decode_commit(&xdr, res);
4053         if (status)
4054                 goto out;
4055         decode_getfattr(&xdr, res->fattr, res->server);
4056 out:
4057         return status;
4058 }
4059
4060 /*
4061  * FSINFO request
4062  */
4063 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4064 {
4065         struct xdr_stream xdr;
4066         struct compound_hdr hdr;
4067         int status;
4068
4069         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4070         status = decode_compound_hdr(&xdr, &hdr);
4071         if (!status)
4072                 status = decode_putfh(&xdr);
4073         if (!status)
4074                 status = decode_fsinfo(&xdr, fsinfo);
4075         if (!status)
4076                 status = -nfs_stat_to_errno(hdr.status);
4077         return status;
4078 }
4079
4080 /*
4081  * PATHCONF request
4082  */
4083 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4084 {
4085         struct xdr_stream xdr;
4086         struct compound_hdr hdr;
4087         int status;
4088
4089         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4090         status = decode_compound_hdr(&xdr, &hdr);
4091         if (!status)
4092                 status = decode_putfh(&xdr);
4093         if (!status)
4094                 status = decode_pathconf(&xdr, pathconf);
4095         return status;
4096 }
4097
4098 /*
4099  * STATFS request
4100  */
4101 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4102 {
4103         struct xdr_stream xdr;
4104         struct compound_hdr hdr;
4105         int status;
4106
4107         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4108         status = decode_compound_hdr(&xdr, &hdr);
4109         if (!status)
4110                 status = decode_putfh(&xdr);
4111         if (!status)
4112                 status = decode_statfs(&xdr, fsstat);
4113         return status;
4114 }
4115
4116 /*
4117  * GETATTR_BITMAP request
4118  */
4119 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4120 {
4121         struct xdr_stream xdr;
4122         struct compound_hdr hdr;
4123         int status;
4124
4125         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4126         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4127                 goto out;
4128         if ((status = decode_putfh(&xdr)) != 0)
4129                 goto out;
4130         status = decode_server_caps(&xdr, res);
4131 out:
4132         return status;
4133 }
4134
4135 /*
4136  * Decode RENEW response
4137  */
4138 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4139 {
4140         struct xdr_stream xdr;
4141         struct compound_hdr hdr;
4142         int status;
4143
4144         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4145         status = decode_compound_hdr(&xdr, &hdr);
4146         if (!status)
4147                 status = decode_renew(&xdr);
4148         return status;
4149 }
4150
4151 /*
4152  * a SETCLIENTID request
4153  */
4154 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4155                 struct nfs4_client *clp)
4156 {
4157         struct xdr_stream xdr;
4158         struct compound_hdr hdr;
4159         int status;
4160
4161         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4162         status = decode_compound_hdr(&xdr, &hdr);
4163         if (!status)
4164                 status = decode_setclientid(&xdr, clp);
4165         if (!status)
4166                 status = -nfs_stat_to_errno(hdr.status);
4167         return status;
4168 }
4169
4170 /*
4171  * a SETCLIENTID_CONFIRM request
4172  */
4173 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4174 {
4175         struct xdr_stream xdr;
4176         struct compound_hdr hdr;
4177         int status;
4178
4179         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4180         status = decode_compound_hdr(&xdr, &hdr);
4181         if (!status)
4182                 status = decode_setclientid_confirm(&xdr);
4183         if (!status)
4184                 status = decode_putrootfh(&xdr);
4185         if (!status)
4186                 status = decode_fsinfo(&xdr, fsinfo);
4187         if (!status)
4188                 status = -nfs_stat_to_errno(hdr.status);
4189         return status;
4190 }
4191
4192 /*
4193  * DELEGRETURN request
4194  */
4195 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_delegreturnres *res)
4196 {
4197         struct xdr_stream xdr;
4198         struct compound_hdr hdr;
4199         int status;
4200
4201         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4202         status = decode_compound_hdr(&xdr, &hdr);
4203         if (status != 0)
4204                 goto out;
4205         status = decode_putfh(&xdr);
4206         if (status != 0)
4207                 goto out;
4208         status = decode_delegreturn(&xdr);
4209         decode_getfattr(&xdr, res->fattr, res->server);
4210 out:
4211         return status;
4212 }
4213
4214 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4215 {
4216         uint32_t bitmap[2] = {0};
4217         uint32_t len;
4218
4219         if (!*p++) {
4220                 if (!*p)
4221                         return ERR_PTR(-EAGAIN);
4222                 entry->eof = 1;
4223                 return ERR_PTR(-EBADCOOKIE);
4224         }
4225
4226         entry->prev_cookie = entry->cookie;
4227         p = xdr_decode_hyper(p, &entry->cookie);
4228         entry->len = ntohl(*p++);
4229         entry->name = (const char *) p;
4230         p += XDR_QUADLEN(entry->len);
4231
4232         /*
4233          * In case the server doesn't return an inode number,
4234          * we fake one here.  (We don't use inode number 0,
4235          * since glibc seems to choke on it...)
4236          */
4237         entry->ino = 1;
4238
4239         len = ntohl(*p++);              /* bitmap length */
4240         if (len-- > 0) {
4241                 bitmap[0] = ntohl(*p++);
4242                 if (len-- > 0) {
4243                         bitmap[1] = ntohl(*p++);
4244                         p += len;
4245                 }
4246         }
4247         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4248         if (len > 0) {
4249                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4250                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4251                         /* Ignore the return value of rdattr_error for now */
4252                         p++;
4253                         len--;
4254                 }
4255                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4256                         xdr_decode_hyper(p, &entry->ino);
4257                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4258                         xdr_decode_hyper(p, &entry->ino);
4259                 p += len;
4260         }
4261
4262         entry->eof = !p[0] && p[1];
4263         return p;
4264 }
4265
4266 /*
4267  * We need to translate between nfs status return values and
4268  * the local errno values which may not be the same.
4269  */
4270 static struct {
4271         int stat;
4272         int errno;
4273 } nfs_errtbl[] = {
4274         { NFS4_OK,              0               },
4275         { NFS4ERR_PERM,         EPERM           },
4276         { NFS4ERR_NOENT,        ENOENT          },
4277         { NFS4ERR_IO,           errno_NFSERR_IO },
4278         { NFS4ERR_NXIO,         ENXIO           },
4279         { NFS4ERR_ACCESS,       EACCES          },
4280         { NFS4ERR_EXIST,        EEXIST          },
4281         { NFS4ERR_XDEV,         EXDEV           },
4282         { NFS4ERR_NOTDIR,       ENOTDIR         },
4283         { NFS4ERR_ISDIR,        EISDIR          },
4284         { NFS4ERR_INVAL,        EINVAL          },
4285         { NFS4ERR_FBIG,         EFBIG           },
4286         { NFS4ERR_NOSPC,        ENOSPC          },
4287         { NFS4ERR_ROFS,         EROFS           },
4288         { NFS4ERR_MLINK,        EMLINK          },
4289         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4290         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4291         { NFS4ERR_DQUOT,        EDQUOT          },
4292         { NFS4ERR_STALE,        ESTALE          },
4293         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4294         { NFS4ERR_BADOWNER,     EINVAL          },
4295         { NFS4ERR_BADNAME,      EINVAL          },
4296         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4297         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4298         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4299         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4300         { NFS4ERR_BADTYPE,      EBADTYPE        },
4301         { NFS4ERR_LOCKED,       EAGAIN          },
4302         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4303         { NFS4ERR_SYMLINK,      ELOOP           },
4304         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4305         { NFS4ERR_DEADLOCK,     EDEADLK         },
4306         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4307                                                     * to be handled by a
4308                                                     * middle-layer.
4309                                                     */
4310         { -1,                   EIO             }
4311 };
4312
4313 /*
4314  * Convert an NFS error code to a local one.
4315  * This one is used jointly by NFSv2 and NFSv3.
4316  */
4317 static int
4318 nfs_stat_to_errno(int stat)
4319 {
4320         int i;
4321         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4322                 if (nfs_errtbl[i].stat == stat)
4323                         return nfs_errtbl[i].errno;
4324         }
4325         if (stat <= 10000 || stat > 10100) {
4326                 /* The server is looney tunes. */
4327                 return ESERVERFAULT;
4328         }
4329         /* If we cannot translate the error, the recovery routines should
4330          * handle it.
4331          * Note: remaining NFSv4 error codes have values > 10000, so should
4332          * not conflict with native Linux error codes.
4333          */
4334         return stat;
4335 }
4336
4337 #ifndef MAX
4338 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4339 #endif
4340
4341 #define PROC(proc, argtype, restype)                            \
4342 [NFSPROC4_CLNT_##proc] = {                                      \
4343         .p_proc   = NFSPROC4_COMPOUND,                          \
4344         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4345         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4346         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4347         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4348         .p_name   = #proc,                                      \
4349     }
4350
4351 struct rpc_procinfo     nfs4_procedures[] = {
4352   PROC(READ,            enc_read,       dec_read),
4353   PROC(WRITE,           enc_write,      dec_write),
4354   PROC(COMMIT,          enc_commit,     dec_commit),
4355   PROC(OPEN,            enc_open,       dec_open),
4356   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4357   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4358   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4359   PROC(CLOSE,           enc_close,      dec_close),
4360   PROC(SETATTR,         enc_setattr,    dec_setattr),
4361   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4362   PROC(RENEW,           enc_renew,      dec_renew),
4363   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4364   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4365   PROC(LOCK,            enc_lock,       dec_lock),
4366   PROC(LOCKT,           enc_lockt,      dec_lockt),
4367   PROC(LOCKU,           enc_locku,      dec_locku),
4368   PROC(ACCESS,          enc_access,     dec_access),
4369   PROC(GETATTR,         enc_getattr,    dec_getattr),
4370   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4371   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4372   PROC(REMOVE,          enc_remove,     dec_remove),
4373   PROC(RENAME,          enc_rename,     dec_rename),
4374   PROC(LINK,            enc_link,       dec_link),
4375   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4376   PROC(CREATE,          enc_create,     dec_create),
4377   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4378   PROC(STATFS,          enc_statfs,     dec_statfs),
4379   PROC(READLINK,        enc_readlink,   dec_readlink),
4380   PROC(READDIR,         enc_readdir,    dec_readdir),
4381   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4382   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4383   PROC(GETACL,          enc_getacl,     dec_getacl),
4384   PROC(SETACL,          enc_setacl,     dec_setacl),
4385 };
4386
4387 struct rpc_version              nfs_version4 = {
4388         .number                 = 4,
4389         .nrprocs                = sizeof(nfs4_procedures)/sizeof(nfs4_procedures[0]),
4390         .procs                  = nfs4_procedures
4391 };
4392
4393 /*
4394  * Local variables:
4395  *  c-basic-offset: 8
4396  * End:
4397  */