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 nfs4_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                                 1 + \
 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 #define NFS4_enc_fs_locations_sz \
 415                                 (compound_encode_hdr_maxsz + \
 416                                  encode_putfh_maxsz + \
 417                                  encode_getattr_maxsz)
 418 #define NFS4_dec_fs_locations_sz \
 419                                 (compound_decode_hdr_maxsz + \
 420                                  decode_putfh_maxsz + \
 421                                  op_decode_hdr_maxsz + \
 422                                  nfs4_fattr_bitmap_maxsz)
 423
 424 static struct {
 425         unsigned int    mode;
 426         unsigned int    nfs2type;
 427 } nfs_type2fmt[] = {
 428         { 0,            NFNON        },
 429         { S_IFREG,      NFREG        },
 430         { S_IFDIR,      NFDIR        },
 431         { S_IFBLK,      NFBLK        },
 432         { S_IFCHR,      NFCHR        },
 433         { S_IFLNK,      NFLNK        },
 434         { S_IFSOCK,     NFSOCK       },
 435         { S_IFIFO,      NFFIFO       },
 436         { 0,            NFNON        },
 437         { 0,            NFNON        },
 438 };
 439
 440 struct compound_hdr {
 441         int32_t         status;
 442         uint32_t        nops;
 443         uint32_t        taglen;
 444         char *          tag;
 445 };
 446
 447 /*
 448  * START OF "GENERIC" ENCODE ROUTINES.
 449  *   These may look a little ugly since they are imported from a "generic"
 450  * set of XDR encode/decode routines which are intended to be shared by
 451  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 452  *
 453  * If the pain of reading these is too great, it should be a straightforward
 454  * task to translate them into Linux-specific versions which are more
 455  * consistent with the style used in NFSv2/v3...
 456  */
 457 #define WRITE32(n)               *p++ = htonl(n)
 458 #define WRITE64(n)               do {                           \
 459         *p++ = htonl((uint32_t)((n) >> 32));                            \
 460         *p++ = htonl((uint32_t)(n));                                    \
 461 } while (0)
 462 #define WRITEMEM(ptr,nbytes)     do {                           \
 463         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 464 } while (0)
 465
 466 #define RESERVE_SPACE(nbytes)   do {                            \
 467         p = xdr_reserve_space(xdr, nbytes);                     \
 468         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 469         BUG_ON(!p);                                             \
 470 } while (0)
 471
 472 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 473 {
 474         uint32_t *p;
 475
 476         p = xdr_reserve_space(xdr, 4 + len);
 477         BUG_ON(p == NULL);
 478         xdr_encode_opaque(p, str, len);
 479 }
 480
 481 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 482 {
 483         uint32_t *p;
 484
 485         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 486         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 487         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 488         WRITE32(hdr->taglen);
 489         WRITEMEM(hdr->tag, hdr->taglen);
 490         WRITE32(NFS4_MINOR_VERSION);
 491         WRITE32(hdr->nops);
 492         return 0;
 493 }
 494
 495 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 496 {
 497         uint32_t *p;
 498
 499         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 500         BUG_ON(p == NULL);
 501         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 502 }
 503
 504 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 505 {
 506         char owner_name[IDMAP_NAMESZ];
 507         char owner_group[IDMAP_NAMESZ];
 508         int owner_namelen = 0;
 509         int owner_grouplen = 0;
 510         uint32_t *p;
 511         uint32_t *q;
 512         int len;
 513         uint32_t bmval0 = 0;
 514         uint32_t bmval1 = 0;
 515         int status;
 516
 517         /*
 518          * We reserve enough space to write the entire attribute buffer at once.
 519          * In the worst-case, this would be
 520          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 521          *          = 36 bytes, plus any contribution from variable-length fields
 522          *            such as owner/group.
 523          */
 524         len = 16;
 525
 526         /* Sigh */
 527         if (iap->ia_valid & ATTR_SIZE)
 528                 len += 8;
 529         if (iap->ia_valid & ATTR_MODE)
 530                 len += 4;
 531         if (iap->ia_valid & ATTR_UID) {
 532                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 533                 if (owner_namelen < 0) {
 534                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 535                                iap->ia_uid);
 536                         /* XXX */
 537                         strcpy(owner_name, "nobody");
 538                         owner_namelen = sizeof("nobody") - 1;
 539                         /* goto out; */
 540                 }
 541                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 542         }
 543         if (iap->ia_valid & ATTR_GID) {
 544                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 545                 if (owner_grouplen < 0) {
 546                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 547                                iap->ia_gid);
 548                         strcpy(owner_group, "nobody");
 549                         owner_grouplen = sizeof("nobody") - 1;
 550                         /* goto out; */
 551                 }
 552                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 553         }
 554         if (iap->ia_valid & ATTR_ATIME_SET)
 555                 len += 16;
 556         else if (iap->ia_valid & ATTR_ATIME)
 557                 len += 4;
 558         if (iap->ia_valid & ATTR_MTIME_SET)
 559                 len += 16;
 560         else if (iap->ia_valid & ATTR_MTIME)
 561                 len += 4;
 562         RESERVE_SPACE(len);
 563
 564         /*
 565          * We write the bitmap length now, but leave the bitmap and the attribute
 566          * buffer length to be backfilled at the end of this routine.
 567          */
 568         WRITE32(2);
 569         q = p;
 570         p += 3;
 571
 572         if (iap->ia_valid & ATTR_SIZE) {
 573                 bmval0 |= FATTR4_WORD0_SIZE;
 574                 WRITE64(iap->ia_size);
 575         }
 576         if (iap->ia_valid & ATTR_MODE) {
 577                 bmval1 |= FATTR4_WORD1_MODE;
 578                 WRITE32(iap->ia_mode & S_IALLUGO);
 579         }
 580         if (iap->ia_valid & ATTR_UID) {
 581                 bmval1 |= FATTR4_WORD1_OWNER;
 582                 WRITE32(owner_namelen);
 583                 WRITEMEM(owner_name, owner_namelen);
 584         }
 585         if (iap->ia_valid & ATTR_GID) {
 586                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 587                 WRITE32(owner_grouplen);
 588                 WRITEMEM(owner_group, owner_grouplen);
 589         }
 590         if (iap->ia_valid & ATTR_ATIME_SET) {
 591                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 592                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 593                 WRITE32(0);
 594                 WRITE32(iap->ia_mtime.tv_sec);
 595                 WRITE32(iap->ia_mtime.tv_nsec);
 596         }
 597         else if (iap->ia_valid & ATTR_ATIME) {
 598                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 599                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 600         }
 601         if (iap->ia_valid & ATTR_MTIME_SET) {
 602                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 603                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 604                 WRITE32(0);
 605                 WRITE32(iap->ia_mtime.tv_sec);
 606                 WRITE32(iap->ia_mtime.tv_nsec);
 607         }
 608         else if (iap->ia_valid & ATTR_MTIME) {
 609                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 610                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 611         }
 612
 613         /*
 614          * Now we backfill the bitmap and the attribute buffer length.
 615          */
 616         if (len != ((char *)p - (char *)q) + 4) {
 617                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 618                                 len, ((char *)p - (char *)q) + 4);
 619                 BUG();
 620         }
 621         len = (char *)p - (char *)q - 12;
 622         *q++ = htonl(bmval0);
 623         *q++ = htonl(bmval1);
 624         *q++ = htonl(len);
 625
 626         status = 0;
 627 /* out: */
 628         return status;
 629 }
 630
 631 static int encode_access(struct xdr_stream *xdr, u32 access)
 632 {
 633         uint32_t *p;
 634
 635         RESERVE_SPACE(8);
 636         WRITE32(OP_ACCESS);
 637         WRITE32(access);
 638
 639         return 0;
 640 }
 641
 642 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 643 {
 644         uint32_t *p;
 645
 646         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 647         WRITE32(OP_CLOSE);
 648         WRITE32(arg->seqid->sequence->counter);
 649         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 650
 651         return 0;
 652 }
 653
 654 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 655 {
 656         uint32_t *p;
 657
 658         RESERVE_SPACE(16);
 659         WRITE32(OP_COMMIT);
 660         WRITE64(args->offset);
 661         WRITE32(args->count);
 662
 663         return 0;
 664 }
 665
 666 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 667 {
 668         uint32_t *p;
 669
 670         RESERVE_SPACE(8);
 671         WRITE32(OP_CREATE);
 672         WRITE32(create->ftype);
 673
 674         switch (create->ftype) {
 675         case NF4LNK:
 676                 RESERVE_SPACE(4);
 677                 WRITE32(create->u.symlink.len);
 678                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 679                 break;
 680
 681         case NF4BLK: case NF4CHR:
 682                 RESERVE_SPACE(8);
 683                 WRITE32(create->u.device.specdata1);
 684                 WRITE32(create->u.device.specdata2);
 685                 break;
 686
 687         default:
 688                 break;
 689         }
 690
 691         RESERVE_SPACE(4 + create->name->len);
 692         WRITE32(create->name->len);
 693         WRITEMEM(create->name->name, create->name->len);
 694
 695         return encode_attrs(xdr, create->attrs, create->server);
 696 }
 697
 698 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 699 {
 700         uint32_t *p;
 701
 702         RESERVE_SPACE(12);
 703         WRITE32(OP_GETATTR);
 704         WRITE32(1);
 705         WRITE32(bitmap);
 706         return 0;
 707 }
 708
 709 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 710 {
 711         uint32_t *p;
 712
 713         RESERVE_SPACE(16);
 714         WRITE32(OP_GETATTR);
 715         WRITE32(2);
 716         WRITE32(bm0);
 717         WRITE32(bm1);
 718         return 0;
 719 }
 720
 721 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 722 {
 723         return encode_getattr_two(xdr,
 724                         bitmask[0] & nfs4_fattr_bitmap[0],
 725                         bitmask[1] & nfs4_fattr_bitmap[1]);
 726 }
 727
 728 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 729 {
 730         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 731                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 732 }
 733
 734 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 735 {
 736         return encode_getattr_two(xdr,
 737                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 738                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 739 }
 740
 741 static int encode_getfh(struct xdr_stream *xdr)
 742 {
 743         uint32_t *p;
 744
 745         RESERVE_SPACE(4);
 746         WRITE32(OP_GETFH);
 747
 748         return 0;
 749 }
 750
 751 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 752 {
 753         uint32_t *p;
 754
 755         RESERVE_SPACE(8 + name->len);
 756         WRITE32(OP_LINK);
 757         WRITE32(name->len);
 758         WRITEMEM(name->name, name->len);
 759
 760         return 0;
 761 }
 762
 763 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 764 {
 765         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 766                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 767         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 768 }
 769
 770 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 771 {
 772         if (fl->fl_end == OFFSET_MAX)
 773                 return ~(uint64_t)0;
 774         return fl->fl_end - fl->fl_start + 1;
 775 }
 776
 777 /*
 778  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 779  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 780  */
 781 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 782 {
 783         uint32_t *p;
 784
 785         RESERVE_SPACE(32);
 786         WRITE32(OP_LOCK);
 787         WRITE32(nfs4_lock_type(args->fl, args->block));
 788         WRITE32(args->reclaim);
 789         WRITE64(args->fl->fl_start);
 790         WRITE64(nfs4_lock_length(args->fl));
 791         WRITE32(args->new_lock_owner);
 792         if (args->new_lock_owner){
 793                 RESERVE_SPACE(40);
 794                 WRITE32(args->open_seqid->sequence->counter);
 795                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
 796                 WRITE32(args->lock_seqid->sequence->counter);
 797                 WRITE64(args->lock_owner.clientid);
 798                 WRITE32(4);
 799                 WRITE32(args->lock_owner.id);
 800         }
 801         else {
 802                 RESERVE_SPACE(20);
 803                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
 804                 WRITE32(args->lock_seqid->sequence->counter);
 805         }
 806
 807         return 0;
 808 }
 809
 810 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 811 {
 812         uint32_t *p;
 813
 814         RESERVE_SPACE(40);
 815         WRITE32(OP_LOCKT);
 816         WRITE32(nfs4_lock_type(args->fl, 0));
 817         WRITE64(args->fl->fl_start);
 818         WRITE64(nfs4_lock_length(args->fl));
 819         WRITE64(args->lock_owner.clientid);
 820         WRITE32(4);
 821         WRITE32(args->lock_owner.id);
 822
 823         return 0;
 824 }
 825
 826 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 827 {
 828         uint32_t *p;
 829
 830         RESERVE_SPACE(44);
 831         WRITE32(OP_LOCKU);
 832         WRITE32(nfs4_lock_type(args->fl, 0));
 833         WRITE32(args->seqid->sequence->counter);
 834         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
 835         WRITE64(args->fl->fl_start);
 836         WRITE64(nfs4_lock_length(args->fl));
 837
 838         return 0;
 839 }
 840
 841 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 842 {
 843         int len = name->len;
 844         uint32_t *p;
 845
 846         RESERVE_SPACE(8 + len);
 847         WRITE32(OP_LOOKUP);
 848         WRITE32(len);
 849         WRITEMEM(name->name, len);
 850
 851         return 0;
 852 }
 853
 854 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 855 {
 856         uint32_t *p;
 857
 858         RESERVE_SPACE(8);
 859         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 860                 case FMODE_READ:
 861                         WRITE32(NFS4_SHARE_ACCESS_READ);
 862                         break;
 863                 case FMODE_WRITE:
 864                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 865                         break;
 866                 case FMODE_READ|FMODE_WRITE:
 867                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 868                         break;
 869                 default:
 870                         BUG();
 871         }
 872         WRITE32(0);             /* for linux, share_deny = 0 always */
 873 }
 874
 875 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 876 {
 877         uint32_t *p;
 878  /*
 879  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 880  * owner 4 = 32
 881  */
 882         RESERVE_SPACE(8);
 883         WRITE32(OP_OPEN);
 884         WRITE32(arg->seqid->sequence->counter);
 885         encode_share_access(xdr, arg->open_flags);
 886         RESERVE_SPACE(16);
 887         WRITE64(arg->clientid);
 888         WRITE32(4);
 889         WRITE32(arg->id);
 890 }
 891
 892 static inline void encode_createmode(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_EXCL) {
 898                 case 0:
 899                         WRITE32(NFS4_CREATE_UNCHECKED);
 900                         encode_attrs(xdr, arg->u.attrs, arg->server);
 901                         break;
 902                 default:
 903                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 904                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 905         }
 906 }
 907
 908 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 909 {
 910         uint32_t *p;
 911
 912         RESERVE_SPACE(4);
 913         switch (arg->open_flags & O_CREAT) {
 914                 case 0:
 915                         WRITE32(NFS4_OPEN_NOCREATE);
 916                         break;
 917                 default:
 918                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 919                         WRITE32(NFS4_OPEN_CREATE);
 920                         encode_createmode(xdr, arg);
 921         }
 922 }
 923
 924 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 925 {
 926         uint32_t *p;
 927
 928         RESERVE_SPACE(4);
 929         switch (delegation_type) {
 930                 case 0:
 931                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 932                         break;
 933                 case FMODE_READ:
 934                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 935                         break;
 936                 case FMODE_WRITE|FMODE_READ:
 937                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 938                         break;
 939                 default:
 940                         BUG();
 941         }
 942 }
 943
 944 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 945 {
 946         uint32_t *p;
 947
 948         RESERVE_SPACE(4);
 949         WRITE32(NFS4_OPEN_CLAIM_NULL);
 950         encode_string(xdr, name->len, name->name);
 951 }
 952
 953 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 954 {
 955         uint32_t *p;
 956
 957         RESERVE_SPACE(4);
 958         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 959         encode_delegation_type(xdr, type);
 960 }
 961
 962 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 963 {
 964         uint32_t *p;
 965
 966         RESERVE_SPACE(4+sizeof(stateid->data));
 967         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 968         WRITEMEM(stateid->data, sizeof(stateid->data));
 969         encode_string(xdr, name->len, name->name);
 970 }
 971
 972 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 973 {
 974         encode_openhdr(xdr, arg);
 975         encode_opentype(xdr, arg);
 976         switch (arg->claim) {
 977                 case NFS4_OPEN_CLAIM_NULL:
 978                         encode_claim_null(xdr, arg->name);
 979                         break;
 980                 case NFS4_OPEN_CLAIM_PREVIOUS:
 981                         encode_claim_previous(xdr, arg->u.delegation_type);
 982                         break;
 983                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 984                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 985                         break;
 986                 default:
 987                         BUG();
 988         }
 989         return 0;
 990 }
 991
 992 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 993 {
 994         uint32_t *p;
 995
 996         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 997         WRITE32(OP_OPEN_CONFIRM);
 998         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 999         WRITE32(arg->seqid->sequence->counter);
1000
1001         return 0;
1002 }
1003
1004 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1005 {
1006         uint32_t *p;
1007
1008         RESERVE_SPACE(8+sizeof(arg->stateid->data));
1009         WRITE32(OP_OPEN_DOWNGRADE);
1010         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
1011         WRITE32(arg->seqid->sequence->counter);
1012         encode_share_access(xdr, arg->open_flags);
1013         return 0;
1014 }
1015
1016 static int
1017 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1018 {
1019         int len = fh->size;
1020         uint32_t *p;
1021
1022         RESERVE_SPACE(8 + len);
1023         WRITE32(OP_PUTFH);
1024         WRITE32(len);
1025         WRITEMEM(fh->data, len);
1026
1027         return 0;
1028 }
1029
1030 static int encode_putrootfh(struct xdr_stream *xdr)
1031 {
1032         uint32_t *p;
1033
1034         RESERVE_SPACE(4);
1035         WRITE32(OP_PUTROOTFH);
1036
1037         return 0;
1038 }
1039
1040 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1041 {
1042         nfs4_stateid stateid;
1043         uint32_t *p;
1044
1045         RESERVE_SPACE(16);
1046         if (ctx->state != NULL) {
1047                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1048                 WRITEMEM(stateid.data, sizeof(stateid.data));
1049         } else
1050                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1051 }
1052
1053 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1054 {
1055         uint32_t *p;
1056
1057         RESERVE_SPACE(4);
1058         WRITE32(OP_READ);
1059
1060         encode_stateid(xdr, args->context);
1061
1062         RESERVE_SPACE(12);
1063         WRITE64(args->offset);
1064         WRITE32(args->count);
1065
1066         return 0;
1067 }
1068
1069 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1070 {
1071         struct rpc_auth *auth = req->rq_task->tk_auth;
1072         uint32_t attrs[2] = {
1073                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1074                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1075         };
1076         int replen;
1077         uint32_t *p;
1078
1079         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1080         WRITE32(OP_READDIR);
1081         WRITE64(readdir->cookie);
1082         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1083         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1084         WRITE32(readdir->count);
1085         WRITE32(2);
1086         /* Switch to mounted_on_fileid if the server supports it */
1087         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1088                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1089         else
1090                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1091         WRITE32(attrs[0] & readdir->bitmask[0]);
1092         WRITE32(attrs[1] & readdir->bitmask[1]);
1093         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1094                         __FUNCTION__,
1095                         (unsigned long long)readdir->cookie,
1096                         ((u32 *)readdir->verifier.data)[0],
1097                         ((u32 *)readdir->verifier.data)[1],
1098                         attrs[0] & readdir->bitmask[0],
1099                         attrs[1] & readdir->bitmask[1]);
1100
1101         /* set up reply kvec
1102          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1103          *      + OP_READDIR + status + verifer(2)  = 9
1104          */
1105         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1106         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1107                          readdir->pgbase, readdir->count);
1108         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1109                         __FUNCTION__, replen, readdir->pages,
1110                         readdir->pgbase, readdir->count);
1111
1112         return 0;
1113 }
1114
1115 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1116 {
1117         struct rpc_auth *auth = req->rq_task->tk_auth;
1118         unsigned int replen;
1119         uint32_t *p;
1120
1121         RESERVE_SPACE(4);
1122         WRITE32(OP_READLINK);
1123
1124         /* set up reply kvec
1125          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1126          *      + OP_READLINK + status + string length = 8
1127          */
1128         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1129         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1130                         readlink->pgbase, readlink->pglen);
1131
1132         return 0;
1133 }
1134
1135 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1136 {
1137         uint32_t *p;
1138
1139         RESERVE_SPACE(8 + name->len);
1140         WRITE32(OP_REMOVE);
1141         WRITE32(name->len);
1142         WRITEMEM(name->name, name->len);
1143
1144         return 0;
1145 }
1146
1147 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1148 {
1149         uint32_t *p;
1150
1151         RESERVE_SPACE(8 + oldname->len);
1152         WRITE32(OP_RENAME);
1153         WRITE32(oldname->len);
1154         WRITEMEM(oldname->name, oldname->len);
1155
1156         RESERVE_SPACE(4 + newname->len);
1157         WRITE32(newname->len);
1158         WRITEMEM(newname->name, newname->len);
1159
1160         return 0;
1161 }
1162
1163 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1164 {
1165         uint32_t *p;
1166
1167         RESERVE_SPACE(12);
1168         WRITE32(OP_RENEW);
1169         WRITE64(client_stateid->cl_clientid);
1170
1171         return 0;
1172 }
1173
1174 static int
1175 encode_restorefh(struct xdr_stream *xdr)
1176 {
1177         uint32_t *p;
1178
1179         RESERVE_SPACE(4);
1180         WRITE32(OP_RESTOREFH);
1181
1182         return 0;
1183 }
1184
1185 static int
1186 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1187 {
1188         uint32_t *p;
1189
1190         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1191         WRITE32(OP_SETATTR);
1192         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1193         RESERVE_SPACE(2*4);
1194         WRITE32(1);
1195         WRITE32(FATTR4_WORD0_ACL);
1196         if (arg->acl_len % 4)
1197                 return -EINVAL;
1198         RESERVE_SPACE(4);
1199         WRITE32(arg->acl_len);
1200         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1201         return 0;
1202 }
1203
1204 static int
1205 encode_savefh(struct xdr_stream *xdr)
1206 {
1207         uint32_t *p;
1208
1209         RESERVE_SPACE(4);
1210         WRITE32(OP_SAVEFH);
1211
1212         return 0;
1213 }
1214
1215 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1216 {
1217         int status;
1218         uint32_t *p;
1219
1220         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1221         WRITE32(OP_SETATTR);
1222         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1223
1224         if ((status = encode_attrs(xdr, arg->iap, server)))
1225                 return status;
1226
1227         return 0;
1228 }
1229
1230 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1231 {
1232         uint32_t *p;
1233
1234         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1235         WRITE32(OP_SETCLIENTID);
1236         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1237
1238         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1239         RESERVE_SPACE(4);
1240         WRITE32(setclientid->sc_prog);
1241         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1242         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1243         RESERVE_SPACE(4);
1244         WRITE32(setclientid->sc_cb_ident);
1245
1246         return 0;
1247 }
1248
1249 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1250 {
1251         uint32_t *p;
1252
1253         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1254         WRITE32(OP_SETCLIENTID_CONFIRM);
1255         WRITE64(client_state->cl_clientid);
1256         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1257
1258         return 0;
1259 }
1260
1261 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1262 {
1263         uint32_t *p;
1264
1265         RESERVE_SPACE(4);
1266         WRITE32(OP_WRITE);
1267
1268         encode_stateid(xdr, args->context);
1269
1270         RESERVE_SPACE(16);
1271         WRITE64(args->offset);
1272         WRITE32(args->stable);
1273         WRITE32(args->count);
1274
1275         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1276
1277         return 0;
1278 }
1279
1280 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1281 {
1282         uint32_t *p;
1283
1284         RESERVE_SPACE(20);
1285
1286         WRITE32(OP_DELEGRETURN);
1287         WRITEMEM(stateid->data, sizeof(stateid->data));
1288         return 0;
1289
1290 }
1291 /*
1292  * END OF "GENERIC" ENCODE ROUTINES.
1293  */
1294
1295 /*
1296  * Encode an ACCESS request
1297  */
1298 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1299 {
1300         struct xdr_stream xdr;
1301         struct compound_hdr hdr = {
1302                 .nops = 2,
1303         };
1304         int status;
1305
1306         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1307         encode_compound_hdr(&xdr, &hdr);
1308         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1309                 status = encode_access(&xdr, args->access);
1310         return status;
1311 }
1312
1313 /*
1314  * Encode LOOKUP request
1315  */
1316 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1317 {
1318         struct xdr_stream xdr;
1319         struct compound_hdr hdr = {
1320                 .nops = 4,
1321         };
1322         int status;
1323
1324         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1325         encode_compound_hdr(&xdr, &hdr);
1326         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1327                 goto out;
1328         if ((status = encode_lookup(&xdr, args->name)) != 0)
1329                 goto out;
1330         if ((status = encode_getfh(&xdr)) != 0)
1331                 goto out;
1332         status = encode_getfattr(&xdr, args->bitmask);
1333 out:
1334         return status;
1335 }
1336
1337 /*
1338  * Encode LOOKUP_ROOT request
1339  */
1340 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1341 {
1342         struct xdr_stream xdr;
1343         struct compound_hdr hdr = {
1344                 .nops = 3,
1345         };
1346         int status;
1347
1348         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1349         encode_compound_hdr(&xdr, &hdr);
1350         if ((status = encode_putrootfh(&xdr)) != 0)
1351                 goto out;
1352         if ((status = encode_getfh(&xdr)) == 0)
1353                 status = encode_getfattr(&xdr, args->bitmask);
1354 out:
1355         return status;
1356 }
1357
1358 /*
1359  * Encode REMOVE request
1360  */
1361 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1362 {
1363         struct xdr_stream xdr;
1364         struct compound_hdr hdr = {
1365                 .nops = 3,
1366         };
1367         int status;
1368
1369         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1370         encode_compound_hdr(&xdr, &hdr);
1371         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1372                 goto out;
1373         if ((status = encode_remove(&xdr, args->name)) != 0)
1374                 goto out;
1375         status = encode_getfattr(&xdr, args->bitmask);
1376 out:
1377         return status;
1378 }
1379
1380 /*
1381  * Encode RENAME request
1382  */
1383 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1384 {
1385         struct xdr_stream xdr;
1386         struct compound_hdr hdr = {
1387                 .nops = 7,
1388         };
1389         int status;
1390
1391         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1392         encode_compound_hdr(&xdr, &hdr);
1393         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1394                 goto out;
1395         if ((status = encode_savefh(&xdr)) != 0)
1396                 goto out;
1397         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1398                 goto out;
1399         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1400                 goto out;
1401         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1402                 goto out;
1403         if ((status = encode_restorefh(&xdr)) != 0)
1404                 goto out;
1405         status = encode_getfattr(&xdr, args->bitmask);
1406 out:
1407         return status;
1408 }
1409
1410 /*
1411  * Encode LINK request
1412  */
1413 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1414 {
1415         struct xdr_stream xdr;
1416         struct compound_hdr hdr = {
1417                 .nops = 7,
1418         };
1419         int status;
1420
1421         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1422         encode_compound_hdr(&xdr, &hdr);
1423         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1424                 goto out;
1425         if ((status = encode_savefh(&xdr)) != 0)
1426                 goto out;
1427         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1428                 goto out;
1429         if ((status = encode_link(&xdr, args->name)) != 0)
1430                 goto out;
1431         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1432                 goto out;
1433         if ((status = encode_restorefh(&xdr)) != 0)
1434                 goto out;
1435         status = encode_getfattr(&xdr, args->bitmask);
1436 out:
1437         return status;
1438 }
1439
1440 /*
1441  * Encode CREATE request
1442  */
1443 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1444 {
1445         struct xdr_stream xdr;
1446         struct compound_hdr hdr = {
1447                 .nops = 7,
1448         };
1449         int status;
1450
1451         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1452         encode_compound_hdr(&xdr, &hdr);
1453         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1454                 goto out;
1455         if ((status = encode_savefh(&xdr)) != 0)
1456                 goto out;
1457         if ((status = encode_create(&xdr, args)) != 0)
1458                 goto out;
1459         if ((status = encode_getfh(&xdr)) != 0)
1460                 goto out;
1461         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1462                 goto out;
1463         if ((status = encode_restorefh(&xdr)) != 0)
1464                 goto out;
1465         status = encode_getfattr(&xdr, args->bitmask);
1466 out:
1467         return status;
1468 }
1469
1470 /*
1471  * Encode SYMLINK request
1472  */
1473 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1474 {
1475         return nfs4_xdr_enc_create(req, p, args);
1476 }
1477
1478 /*
1479  * Encode GETATTR request
1480  */
1481 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1482 {
1483         struct xdr_stream xdr;
1484         struct compound_hdr hdr = {
1485                 .nops = 2,
1486         };
1487         int status;
1488
1489         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1490         encode_compound_hdr(&xdr, &hdr);
1491         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1492                 status = encode_getfattr(&xdr, args->bitmask);
1493         return status;
1494 }
1495
1496 /*
1497  * Encode a CLOSE request
1498  */
1499 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1500 {
1501         struct xdr_stream xdr;
1502         struct compound_hdr hdr = {
1503                 .nops   = 3,
1504         };
1505         int status;
1506
1507         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1508         encode_compound_hdr(&xdr, &hdr);
1509         status = encode_putfh(&xdr, args->fh);
1510         if(status)
1511                 goto out;
1512         status = encode_close(&xdr, args);
1513         if (status != 0)
1514                 goto out;
1515         status = encode_getfattr(&xdr, args->bitmask);
1516 out:
1517         return status;
1518 }
1519
1520 /*
1521  * Encode an OPEN request
1522  */
1523 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1524 {
1525         struct xdr_stream xdr;
1526         struct compound_hdr hdr = {
1527                 .nops = 7,
1528         };
1529         int status;
1530
1531         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1532         encode_compound_hdr(&xdr, &hdr);
1533         status = encode_putfh(&xdr, args->fh);
1534         if (status)
1535                 goto out;
1536         status = encode_savefh(&xdr);
1537         if (status)
1538                 goto out;
1539         status = encode_open(&xdr, args);
1540         if (status)
1541                 goto out;
1542         status = encode_getfh(&xdr);
1543         if (status)
1544                 goto out;
1545         status = encode_getfattr(&xdr, args->bitmask);
1546         if (status)
1547                 goto out;
1548         status = encode_restorefh(&xdr);
1549         if (status)
1550                 goto out;
1551         status = encode_getfattr(&xdr, args->bitmask);
1552 out:
1553         return status;
1554 }
1555
1556 /*
1557  * Encode an OPEN_CONFIRM request
1558  */
1559 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1560 {
1561         struct xdr_stream xdr;
1562         struct compound_hdr hdr = {
1563                 .nops   = 2,
1564         };
1565         int status;
1566
1567         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1568         encode_compound_hdr(&xdr, &hdr);
1569         status = encode_putfh(&xdr, args->fh);
1570         if(status)
1571                 goto out;
1572         status = encode_open_confirm(&xdr, args);
1573 out:
1574         return status;
1575 }
1576
1577 /*
1578  * Encode an OPEN request with no attributes.
1579  */
1580 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1581 {
1582         struct xdr_stream xdr;
1583         struct compound_hdr hdr = {
1584                 .nops   = 3,
1585         };
1586         int status;
1587
1588         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1589         encode_compound_hdr(&xdr, &hdr);
1590         status = encode_putfh(&xdr, args->fh);
1591         if (status)
1592                 goto out;
1593         status = encode_open(&xdr, args);
1594         if (status)
1595                 goto out;
1596         status = encode_getfattr(&xdr, args->bitmask);
1597 out:
1598         return status;
1599 }
1600
1601 /*
1602  * Encode an OPEN_DOWNGRADE request
1603  */
1604 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1605 {
1606         struct xdr_stream xdr;
1607         struct compound_hdr hdr = {
1608                 .nops   = 3,
1609         };
1610         int status;
1611
1612         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1613         encode_compound_hdr(&xdr, &hdr);
1614         status = encode_putfh(&xdr, args->fh);
1615         if (status)
1616                 goto out;
1617         status = encode_open_downgrade(&xdr, args);
1618         if (status != 0)
1619                 goto out;
1620         status = encode_getfattr(&xdr, args->bitmask);
1621 out:
1622         return status;
1623 }
1624
1625 /*
1626  * Encode a LOCK request
1627  */
1628 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lock_args *args)
1629 {
1630         struct xdr_stream xdr;
1631         struct compound_hdr hdr = {
1632                 .nops   = 2,
1633         };
1634         int status;
1635
1636         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1637         encode_compound_hdr(&xdr, &hdr);
1638         status = encode_putfh(&xdr, args->fh);
1639         if(status)
1640                 goto out;
1641         status = encode_lock(&xdr, args);
1642 out:
1643         return status;
1644 }
1645
1646 /*
1647  * Encode a LOCKT request
1648  */
1649 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockt_args *args)
1650 {
1651         struct xdr_stream xdr;
1652         struct compound_hdr hdr = {
1653                 .nops   = 2,
1654         };
1655         int status;
1656
1657         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1658         encode_compound_hdr(&xdr, &hdr);
1659         status = encode_putfh(&xdr, args->fh);
1660         if(status)
1661                 goto out;
1662         status = encode_lockt(&xdr, args);
1663 out:
1664         return status;
1665 }
1666
1667 /*
1668  * Encode a LOCKU request
1669  */
1670 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_locku_args *args)
1671 {
1672         struct xdr_stream xdr;
1673         struct compound_hdr hdr = {
1674                 .nops   = 2,
1675         };
1676         int status;
1677
1678         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1679         encode_compound_hdr(&xdr, &hdr);
1680         status = encode_putfh(&xdr, args->fh);
1681         if(status)
1682                 goto out;
1683         status = encode_locku(&xdr, args);
1684 out:
1685         return status;
1686 }
1687
1688 /*
1689  * Encode a READLINK request
1690  */
1691 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1692 {
1693         struct xdr_stream xdr;
1694         struct compound_hdr hdr = {
1695                 .nops = 2,
1696         };
1697         int status;
1698
1699         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1700         encode_compound_hdr(&xdr, &hdr);
1701         status = encode_putfh(&xdr, args->fh);
1702         if(status)
1703                 goto out;
1704         status = encode_readlink(&xdr, args, req);
1705 out:
1706         return status;
1707 }
1708
1709 /*
1710  * Encode a READDIR request
1711  */
1712 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1713 {
1714         struct xdr_stream xdr;
1715         struct compound_hdr hdr = {
1716                 .nops = 2,
1717         };
1718         int status;
1719
1720         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1721         encode_compound_hdr(&xdr, &hdr);
1722         status = encode_putfh(&xdr, args->fh);
1723         if(status)
1724                 goto out;
1725         status = encode_readdir(&xdr, args, req);
1726 out:
1727         return status;
1728 }
1729
1730 /*
1731  * Encode a READ request
1732  */
1733 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1734 {
1735         struct rpc_auth *auth = req->rq_task->tk_auth;
1736         struct xdr_stream xdr;
1737         struct compound_hdr hdr = {
1738                 .nops = 2,
1739         };
1740         int replen, status;
1741
1742         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743         encode_compound_hdr(&xdr, &hdr);
1744         status = encode_putfh(&xdr, args->fh);
1745         if (status)
1746                 goto out;
1747         status = encode_read(&xdr, args);
1748         if (status)
1749                 goto out;
1750
1751         /* set up reply kvec
1752          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1753          *       + OP_READ + status + eof + datalen = 9
1754          */
1755         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1756         xdr_inline_pages(&req->rq_rcv_buf, replen,
1757                          args->pages, args->pgbase, args->count);
1758 out:
1759         return status;
1760 }
1761
1762 /*
1763  * Encode an SETATTR request
1764  */
1765 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1766
1767 {
1768         struct xdr_stream xdr;
1769         struct compound_hdr hdr = {
1770                 .nops   = 3,
1771         };
1772         int status;
1773
1774         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1775         encode_compound_hdr(&xdr, &hdr);
1776         status = encode_putfh(&xdr, args->fh);
1777         if(status)
1778                 goto out;
1779         status = encode_setattr(&xdr, args, args->server);
1780         if(status)
1781                 goto out;
1782         status = encode_getfattr(&xdr, args->bitmask);
1783 out:
1784         return status;
1785 }
1786
1787 /*
1788  * Encode a GETACL request
1789  */
1790 static int
1791 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1792                 struct nfs_getaclargs *args)
1793 {
1794         struct xdr_stream xdr;
1795         struct rpc_auth *auth = req->rq_task->tk_auth;
1796         struct compound_hdr hdr = {
1797                 .nops   = 2,
1798         };
1799         int replen, status;
1800
1801         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1802         encode_compound_hdr(&xdr, &hdr);
1803         status = encode_putfh(&xdr, args->fh);
1804         if (status)
1805                 goto out;
1806         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1807         /* set up reply buffer: */
1808         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1809         xdr_inline_pages(&req->rq_rcv_buf, replen,
1810                 args->acl_pages, args->acl_pgbase, args->acl_len);
1811 out:
1812         return status;
1813 }
1814
1815 /*
1816  * Encode a WRITE request
1817  */
1818 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1819 {
1820         struct xdr_stream xdr;
1821         struct compound_hdr hdr = {
1822                 .nops = 3,
1823         };
1824         int status;
1825
1826         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1827         encode_compound_hdr(&xdr, &hdr);
1828         status = encode_putfh(&xdr, args->fh);
1829         if (status)
1830                 goto out;
1831         status = encode_write(&xdr, args);
1832         if (status)
1833                 goto out;
1834         status = encode_getfattr(&xdr, args->bitmask);
1835 out:
1836         return status;
1837 }
1838
1839 /*
1840  *  a COMMIT request
1841  */
1842 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1843 {
1844         struct xdr_stream xdr;
1845         struct compound_hdr hdr = {
1846                 .nops = 3,
1847         };
1848         int status;
1849
1850         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1851         encode_compound_hdr(&xdr, &hdr);
1852         status = encode_putfh(&xdr, args->fh);
1853         if (status)
1854                 goto out;
1855         status = encode_commit(&xdr, args);
1856         if (status)
1857                 goto out;
1858         status = encode_getfattr(&xdr, args->bitmask);
1859 out:
1860         return status;
1861 }
1862
1863 /*
1864  * FSINFO request
1865  */
1866 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1867 {
1868         struct xdr_stream xdr;
1869         struct compound_hdr hdr = {
1870                 .nops   = 2,
1871         };
1872         int status;
1873
1874         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1875         encode_compound_hdr(&xdr, &hdr);
1876         status = encode_putfh(&xdr, args->fh);
1877         if (!status)
1878                 status = encode_fsinfo(&xdr, args->bitmask);
1879         return status;
1880 }
1881
1882 /*
1883  * a PATHCONF request
1884  */
1885 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1886 {
1887         struct xdr_stream xdr;
1888         struct compound_hdr hdr = {
1889                 .nops = 2,
1890         };
1891         int status;
1892
1893         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1894         encode_compound_hdr(&xdr, &hdr);
1895         status = encode_putfh(&xdr, args->fh);
1896         if (!status)
1897                 status = encode_getattr_one(&xdr,
1898                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1899         return status;
1900 }
1901
1902 /*
1903  * a STATFS request
1904  */
1905 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1906 {
1907         struct xdr_stream xdr;
1908         struct compound_hdr hdr = {
1909                 .nops = 2,
1910         };
1911         int status;
1912
1913         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914         encode_compound_hdr(&xdr, &hdr);
1915         status = encode_putfh(&xdr, args->fh);
1916         if (status == 0)
1917                 status = encode_getattr_two(&xdr,
1918                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1919                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1920         return status;
1921 }
1922
1923 /*
1924  * GETATTR_BITMAP request
1925  */
1926 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1927 {
1928         struct xdr_stream xdr;
1929         struct compound_hdr hdr = {
1930                 .nops = 2,
1931         };
1932         int status;
1933
1934         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1935         encode_compound_hdr(&xdr, &hdr);
1936         status = encode_putfh(&xdr, fhandle);
1937         if (status == 0)
1938                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1939                                 FATTR4_WORD0_LINK_SUPPORT|
1940                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1941                                 FATTR4_WORD0_ACLSUPPORT);
1942         return status;
1943 }
1944
1945 /*
1946  * a RENEW request
1947  */
1948 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs_client *clp)
1949 {
1950         struct xdr_stream xdr;
1951         struct compound_hdr hdr = {
1952                 .nops   = 1,
1953         };
1954
1955         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1956         encode_compound_hdr(&xdr, &hdr);
1957         return encode_renew(&xdr, clp);
1958 }
1959
1960 /*
1961  * a SETCLIENTID request
1962  */
1963 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1964 {
1965         struct xdr_stream xdr;
1966         struct compound_hdr hdr = {
1967                 .nops   = 1,
1968         };
1969
1970         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1971         encode_compound_hdr(&xdr, &hdr);
1972         return encode_setclientid(&xdr, sc);
1973 }
1974
1975 /*
1976  * a SETCLIENTID_CONFIRM request
1977  */
1978 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_client *clp)
1979 {
1980         struct xdr_stream xdr;
1981         struct compound_hdr hdr = {
1982                 .nops   = 3,
1983         };
1984         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1985         int status;
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, &hdr);
1989         status = encode_setclientid_confirm(&xdr, clp);
1990         if (!status)
1991                 status = encode_putrootfh(&xdr);
1992         if (!status)
1993                 status = encode_fsinfo(&xdr, lease_bitmap);
1994         return status;
1995 }
1996
1997 /*
1998  * DELEGRETURN request
1999  */
2000 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
2001 {
2002         struct xdr_stream xdr;
2003         struct compound_hdr hdr = {
2004                 .nops = 3,
2005         };
2006         int status;
2007
2008         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2009         encode_compound_hdr(&xdr, &hdr);
2010         status = encode_putfh(&xdr, args->fhandle);
2011         if (status != 0)
2012                 goto out;
2013         status = encode_delegreturn(&xdr, args->stateid);
2014         if (status != 0)
2015                 goto out;
2016         status = encode_getfattr(&xdr, args->bitmask);
2017 out:
2018         return status;
2019 }
2020
2021 /*
2022  * Encode FS_LOCATIONS request
2023  */
2024 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs_locations_arg *args)
2025 {
2026         struct xdr_stream xdr;
2027         struct compound_hdr hdr = {
2028                 .nops = 3,
2029         };
2030         struct rpc_auth *auth = req->rq_task->tk_auth;
2031         int replen;
2032         int status;
2033
2034         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2035         encode_compound_hdr(&xdr, &hdr);
2036         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2037                 goto out;
2038         if ((status = encode_lookup(&xdr, args->name)) != 0)
2039                 goto out;
2040         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2041                 goto out;
2042         /* set up reply
2043          *   toplevel_status + OP_PUTFH + status
2044          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2045          */
2046         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2047         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2048                         0, PAGE_SIZE);
2049 out:
2050         return status;
2051 }
2052
2053 /*
2054  * START OF "GENERIC" DECODE ROUTINES.
2055  *   These may look a little ugly since they are imported from a "generic"
2056  * set of XDR encode/decode routines which are intended to be shared by
2057  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2058  *
2059  * If the pain of reading these is too great, it should be a straightforward
2060  * task to translate them into Linux-specific versions which are more
2061  * consistent with the style used in NFSv2/v3...
2062  */
2063 #define READ32(x)         (x) = ntohl(*p++)
2064 #define READ64(x)         do {                  \
2065         (x) = (u64)ntohl(*p++) << 32;           \
2066         (x) |= ntohl(*p++);                     \
2067 } while (0)
2068 #define READTIME(x)       do {                  \
2069         p++;                                    \
2070         (x.tv_sec) = ntohl(*p++);               \
2071         (x.tv_nsec) = ntohl(*p++);              \
2072 } while (0)
2073 #define COPYMEM(x,nbytes) do {                  \
2074         memcpy((x), p, nbytes);                 \
2075         p += XDR_QUADLEN(nbytes);               \
2076 } while (0)
2077
2078 #define READ_BUF(nbytes)  do { \
2079         p = xdr_inline_decode(xdr, nbytes); \
2080         if (!p) { \
2081                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2082                                 __FUNCTION__, __LINE__); \
2083                 return -EIO; \
2084         } \
2085 } while (0)
2086
2087 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2088 {
2089         uint32_t *p;
2090
2091         READ_BUF(4);
2092         READ32(*len);
2093         READ_BUF(*len);
2094         *string = (char *)p;
2095         return 0;
2096 }
2097
2098 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2099 {
2100         uint32_t *p;
2101
2102         READ_BUF(8);
2103         READ32(hdr->status);
2104         READ32(hdr->taglen);
2105
2106         READ_BUF(hdr->taglen + 4);
2107         hdr->tag = (char *)p;
2108         p += XDR_QUADLEN(hdr->taglen);
2109         READ32(hdr->nops);
2110         return 0;
2111 }
2112
2113 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2114 {
2115         uint32_t *p;
2116         uint32_t opnum;
2117         int32_t nfserr;
2118
2119         READ_BUF(8);
2120         READ32(opnum);
2121         if (opnum != expected) {
2122                 printk(KERN_NOTICE
2123                                 "nfs4_decode_op_hdr: Server returned operation"
2124                                 " %d but we issued a request for %d\n",
2125                                 opnum, expected);
2126                 return -EIO;
2127         }
2128         READ32(nfserr);
2129         if (nfserr != NFS_OK)
2130                 return -nfs4_stat_to_errno(nfserr);
2131         return 0;
2132 }
2133
2134 /* Dummy routine */
2135 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2136 {
2137         uint32_t *p;
2138         unsigned int strlen;
2139         char *str;
2140
2141         READ_BUF(12);
2142         return decode_opaque_inline(xdr, &strlen, &str);
2143 }
2144
2145 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2146 {
2147         uint32_t bmlen, *p;
2148
2149         READ_BUF(4);
2150         READ32(bmlen);
2151
2152         bitmap[0] = bitmap[1] = 0;
2153         READ_BUF((bmlen << 2));
2154         if (bmlen > 0) {
2155                 READ32(bitmap[0]);
2156                 if (bmlen > 1)
2157                         READ32(bitmap[1]);
2158         }
2159         return 0;
2160 }
2161
2162 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2163 {
2164         uint32_t *p;
2165
2166         READ_BUF(4);
2167         READ32(*attrlen);
2168         *savep = xdr->p;
2169         return 0;
2170 }
2171
2172 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2173 {
2174         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2175                 decode_attr_bitmap(xdr, bitmask);
2176                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2177         } else
2178                 bitmask[0] = bitmask[1] = 0;
2179         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2180         return 0;
2181 }
2182
2183 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2184 {
2185         uint32_t *p;
2186
2187         *type = 0;
2188         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2189                 return -EIO;
2190         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2191                 READ_BUF(4);
2192                 READ32(*type);
2193                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2194                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2195                         return -EIO;
2196                 }
2197                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2198         }
2199         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2200         return 0;
2201 }
2202
2203 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2204 {
2205         uint32_t *p;
2206
2207         *change = 0;
2208         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2209                 return -EIO;
2210         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2211                 READ_BUF(8);
2212                 READ64(*change);
2213                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2214         }
2215         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2216                         (unsigned long long)*change);
2217         return 0;
2218 }
2219
2220 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2221 {
2222         uint32_t *p;
2223
2224         *size = 0;
2225         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2226                 return -EIO;
2227         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2228                 READ_BUF(8);
2229                 READ64(*size);
2230                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2231         }
2232         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2233         return 0;
2234 }
2235
2236 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2237 {
2238         uint32_t *p;
2239
2240         *res = 0;
2241         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2242                 return -EIO;
2243         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2244                 READ_BUF(4);
2245                 READ32(*res);
2246                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2247         }
2248         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2249         return 0;
2250 }
2251
2252 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2253 {
2254         uint32_t *p;
2255
2256         *res = 0;
2257         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2258                 return -EIO;
2259         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2260                 READ_BUF(4);
2261                 READ32(*res);
2262                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2263         }
2264         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2265         return 0;
2266 }
2267
2268 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2269 {
2270         uint32_t *p;
2271
2272         fsid->major = 0;
2273         fsid->minor = 0;
2274         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2275                 return -EIO;
2276         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2277                 READ_BUF(16);
2278                 READ64(fsid->major);
2279                 READ64(fsid->minor);
2280                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2281         }
2282         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2283                         (unsigned long long)fsid->major,
2284                         (unsigned long long)fsid->minor);
2285         return 0;
2286 }
2287
2288 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2289 {
2290         uint32_t *p;
2291
2292         *res = 60;
2293         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2294                 return -EIO;
2295         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2296                 READ_BUF(4);
2297                 READ32(*res);
2298                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2299         }
2300         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2301         return 0;
2302 }
2303
2304 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2305 {
2306         uint32_t *p;
2307
2308         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2309         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2310                 return -EIO;
2311         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2312                 READ_BUF(4);
2313                 READ32(*res);
2314                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2315         }
2316         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2317         return 0;
2318 }
2319
2320 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2321 {
2322         uint32_t *p;
2323
2324         *fileid = 0;
2325         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2326                 return -EIO;
2327         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2328                 READ_BUF(8);
2329                 READ64(*fileid);
2330                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2331         }
2332         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2333         return 0;
2334 }
2335
2336 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2337 {
2338         uint32_t *p;
2339
2340         *fileid = 0;
2341         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2342                 return -EIO;
2343         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2344                 READ_BUF(8);
2345                 READ64(*fileid);
2346                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2347         }
2348         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2349         return 0;
2350 }
2351
2352 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2353 {
2354         uint32_t *p;
2355         int status = 0;
2356
2357         *res = 0;
2358         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2359                 return -EIO;
2360         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2361                 READ_BUF(8);
2362                 READ64(*res);
2363                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2364         }
2365         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2366         return status;
2367 }
2368
2369 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2370 {
2371         uint32_t *p;
2372         int status = 0;
2373
2374         *res = 0;
2375         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2376                 return -EIO;
2377         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2378                 READ_BUF(8);
2379                 READ64(*res);
2380                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2381         }
2382         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2383         return status;
2384 }
2385
2386 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2387 {
2388         uint32_t *p;
2389         int status = 0;
2390
2391         *res = 0;
2392         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2393                 return -EIO;
2394         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2395                 READ_BUF(8);
2396                 READ64(*res);
2397                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2398         }
2399         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2400         return status;
2401 }
2402
2403 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2404 {
2405         int n;
2406         uint32_t *p;
2407         int status = 0;
2408
2409         READ_BUF(4);
2410         READ32(n);
2411         if (n < 0)
2412                 goto out_eio;
2413         if (n == 0)
2414                 goto root_path;
2415         dprintk("path ");
2416         path->ncomponents = 0;
2417         while (path->ncomponents < n) {
2418                 struct nfs4_string *component = &path->components[path->ncomponents];
2419                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2420                 if (unlikely(status != 0))
2421                         goto out_eio;
2422                 if (path->ncomponents != n)
2423                         dprintk("/");
2424                 dprintk("%s", component->data);
2425                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2426                         path->ncomponents++;
2427                 else {
2428                         dprintk("cannot parse %d components in path\n", n);
2429                         goto out_eio;
2430                 }
2431         }
2432 out:
2433         dprintk("\n");
2434         return status;
2435 root_path:
2436 /* a root pathname is sent as a zero component4 */
2437         path->ncomponents = 1;
2438         path->components[0].len=0;
2439         path->components[0].data=NULL;
2440         dprintk("path /\n");
2441         goto out;
2442 out_eio:
2443         dprintk(" status %d", status);
2444         status = -EIO;
2445         goto out;
2446 }
2447
2448 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2449 {
2450         int n;
2451         uint32_t *p;
2452         int status = -EIO;
2453
2454         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2455                 goto out;
2456         status = 0;
2457         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2458                 goto out;
2459         dprintk("%s: fsroot ", __FUNCTION__);
2460         status = decode_pathname(xdr, &res->fs_path);
2461         if (unlikely(status != 0))
2462                 goto out;
2463         READ_BUF(4);
2464         READ32(n);
2465         if (n <= 0)
2466                 goto out_eio;
2467         res->nlocations = 0;
2468         while (res->nlocations < n) {
2469                 int m;
2470                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2471
2472                 READ_BUF(4);
2473                 READ32(m);
2474                 if (m <= 0)
2475                         goto out_eio;
2476
2477                 loc->nservers = 0;
2478                 dprintk("%s: servers ", __FUNCTION__);
2479                 while (loc->nservers < m) {
2480                         struct nfs4_string *server = &loc->servers[loc->nservers];
2481                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2482                         if (unlikely(status != 0))
2483                                 goto out_eio;
2484                         dprintk("%s ", server->data);
2485                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2486                                 loc->nservers++;
2487                         else {
2488                                 int i;
2489                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2490                                 for (i = loc->nservers; i < m; i++) {
2491                                         int len;
2492                                         char *data;
2493                                         status = decode_opaque_inline(xdr, &len, &data);
2494                                         if (unlikely(status != 0))
2495                                                 goto out_eio;
2496                                 }
2497                         }
2498                 }
2499                 status = decode_pathname(xdr, &loc->rootpath);
2500                 if (unlikely(status != 0))
2501                         goto out_eio;
2502                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2503                         res->nlocations++;
2504         }
2505 out:
2506         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2507         return status;
2508 out_eio:
2509         status = -EIO;
2510         goto out;
2511 }
2512
2513 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2514 {
2515         uint32_t *p;
2516         int status = 0;
2517
2518         *res = 0;
2519         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2520                 return -EIO;
2521         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2522                 READ_BUF(8);
2523                 READ64(*res);
2524                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2525         }
2526         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2527         return status;
2528 }
2529
2530 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2531 {
2532         uint32_t *p;
2533         int status = 0;
2534
2535         *maxlink = 1;
2536         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2537                 return -EIO;
2538         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2539                 READ_BUF(4);
2540                 READ32(*maxlink);
2541                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2542         }
2543         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2544         return status;
2545 }
2546
2547 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2548 {
2549         uint32_t *p;
2550         int status = 0;
2551
2552         *maxname = 1024;
2553         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2554                 return -EIO;
2555         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2556                 READ_BUF(4);
2557                 READ32(*maxname);
2558                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2559         }
2560         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2561         return status;
2562 }
2563
2564 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2565 {
2566         uint32_t *p;
2567         int status = 0;
2568
2569         *res = 1024;
2570         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2571                 return -EIO;
2572         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2573                 uint64_t maxread;
2574                 READ_BUF(8);
2575                 READ64(maxread);
2576                 if (maxread > 0x7FFFFFFF)
2577                         maxread = 0x7FFFFFFF;
2578                 *res = (uint32_t)maxread;
2579                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2580         }
2581         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2582         return status;
2583 }
2584
2585 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2586 {
2587         uint32_t *p;
2588         int status = 0;
2589
2590         *res = 1024;
2591         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2592                 return -EIO;
2593         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2594                 uint64_t maxwrite;
2595                 READ_BUF(8);
2596                 READ64(maxwrite);
2597                 if (maxwrite > 0x7FFFFFFF)
2598                         maxwrite = 0x7FFFFFFF;
2599                 *res = (uint32_t)maxwrite;
2600                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2601         }
2602         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2603         return status;
2604 }
2605
2606 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2607 {
2608         uint32_t *p;
2609
2610         *mode = 0;
2611         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2612                 return -EIO;
2613         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2614                 READ_BUF(4);
2615                 READ32(*mode);
2616                 *mode &= ~S_IFMT;
2617                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2618         }
2619         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2620         return 0;
2621 }
2622
2623 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2624 {
2625         uint32_t *p;
2626
2627         *nlink = 1;
2628         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2629                 return -EIO;
2630         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2631                 READ_BUF(4);
2632                 READ32(*nlink);
2633                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2634         }
2635         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2636         return 0;
2637 }
2638
2639 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *uid)
2640 {
2641         uint32_t len, *p;
2642
2643         *uid = -2;
2644         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2645                 return -EIO;
2646         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2647                 READ_BUF(4);
2648                 READ32(len);
2649                 READ_BUF(len);
2650                 if (len < XDR_MAX_NETOBJ) {
2651                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2652                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2653                                                 __FUNCTION__);
2654                 } else
2655                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2656                                         __FUNCTION__, len);
2657                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2658         }
2659         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2660         return 0;
2661 }
2662
2663 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *gid)
2664 {
2665         uint32_t len, *p;
2666
2667         *gid = -2;
2668         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2669                 return -EIO;
2670         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2671                 READ_BUF(4);
2672                 READ32(len);
2673                 READ_BUF(len);
2674                 if (len < XDR_MAX_NETOBJ) {
2675                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2676                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2677                                                 __FUNCTION__);
2678                 } else
2679                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2680                                         __FUNCTION__, len);
2681                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2682         }
2683         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2684         return 0;
2685 }
2686
2687 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2688 {
2689         uint32_t major = 0, minor = 0, *p;
2690
2691         *rdev = MKDEV(0,0);
2692         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2693                 return -EIO;
2694         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2695                 dev_t tmp;
2696
2697                 READ_BUF(8);
2698                 READ32(major);
2699                 READ32(minor);
2700                 tmp = MKDEV(major, minor);
2701                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2702                         *rdev = tmp;
2703                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2704         }
2705         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2706         return 0;
2707 }
2708
2709 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2710 {
2711         uint32_t *p;
2712         int status = 0;
2713
2714         *res = 0;
2715         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2716                 return -EIO;
2717         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2718                 READ_BUF(8);
2719                 READ64(*res);
2720                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2721         }
2722         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2723         return status;
2724 }
2725
2726 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2727 {
2728         uint32_t *p;
2729         int status = 0;
2730
2731         *res = 0;
2732         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2733                 return -EIO;
2734         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2735                 READ_BUF(8);
2736                 READ64(*res);
2737                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2738         }
2739         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2740         return status;
2741 }
2742
2743 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2744 {
2745         uint32_t *p;
2746         int status = 0;
2747
2748         *res = 0;
2749         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2750                 return -EIO;
2751         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2752                 READ_BUF(8);
2753                 READ64(*res);
2754                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2755         }
2756         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2757         return status;
2758 }
2759
2760 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2761 {
2762         uint32_t *p;
2763
2764         *used = 0;
2765         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2766                 return -EIO;
2767         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2768                 READ_BUF(8);
2769                 READ64(*used);
2770                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2771         }
2772         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2773                         (unsigned long long)*used);
2774         return 0;
2775 }
2776
2777 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2778 {
2779         uint32_t *p;
2780         uint64_t sec;
2781         uint32_t nsec;
2782
2783         READ_BUF(12);
2784         READ64(sec);
2785         READ32(nsec);
2786         time->tv_sec = (time_t)sec;
2787         time->tv_nsec = (long)nsec;
2788         return 0;
2789 }
2790
2791 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2792 {
2793         int status = 0;
2794
2795         time->tv_sec = 0;
2796         time->tv_nsec = 0;
2797         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2798                 return -EIO;
2799         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2800                 status = decode_attr_time(xdr, time);
2801                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2802         }
2803         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2804         return status;
2805 }
2806
2807 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2808 {
2809         int status = 0;
2810
2811         time->tv_sec = 0;
2812         time->tv_nsec = 0;
2813         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2814                 return -EIO;
2815         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2816                 status = decode_attr_time(xdr, time);
2817                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2818         }
2819         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2820         return status;
2821 }
2822
2823 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2824 {
2825         int status = 0;
2826
2827         time->tv_sec = 0;
2828         time->tv_nsec = 0;
2829         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2830                 return -EIO;
2831         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2832                 status = decode_attr_time(xdr, time);
2833                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2834         }
2835         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2836         return status;
2837 }
2838
2839 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2840 {
2841         unsigned int attrwords = XDR_QUADLEN(attrlen);
2842         unsigned int nwords = xdr->p - savep;
2843
2844         if (unlikely(attrwords != nwords)) {
2845                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2846                                 __FUNCTION__,
2847                                 attrwords << 2,
2848                                 (attrwords < nwords) ? '<' : '>',
2849                                 nwords << 2);
2850                 return -EIO;
2851         }
2852         return 0;
2853 }
2854
2855 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2856 {
2857         uint32_t *p;
2858
2859         READ_BUF(20);
2860         READ32(cinfo->atomic);
2861         READ64(cinfo->before);
2862         READ64(cinfo->after);
2863         return 0;
2864 }
2865
2866 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2867 {
2868         uint32_t *p;
2869         uint32_t supp, acc;
2870         int status;
2871
2872         status = decode_op_hdr(xdr, OP_ACCESS);
2873         if (status)
2874                 return status;
2875         READ_BUF(8);
2876         READ32(supp);
2877         READ32(acc);
2878         access->supported = supp;
2879         access->access = acc;
2880         return 0;
2881 }
2882
2883 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2884 {
2885         uint32_t *p;
2886         int status;
2887
2888         status = decode_op_hdr(xdr, OP_CLOSE);
2889         if (status)
2890                 return status;
2891         READ_BUF(sizeof(res->stateid.data));
2892         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2893         return 0;
2894 }
2895
2896 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2897 {
2898         uint32_t *p;
2899         int status;
2900
2901         status = decode_op_hdr(xdr, OP_COMMIT);
2902         if (status)
2903                 return status;
2904         READ_BUF(8);
2905         COPYMEM(res->verf->verifier, 8);
2906         return 0;
2907 }
2908
2909 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2910 {
2911         uint32_t *p;
2912         uint32_t bmlen;
2913         int status;
2914
2915         status = decode_op_hdr(xdr, OP_CREATE);
2916         if (status)
2917                 return status;
2918         if ((status = decode_change_info(xdr, cinfo)))
2919                 return status;
2920         READ_BUF(4);
2921         READ32(bmlen);
2922         READ_BUF(bmlen << 2);
2923         return 0;
2924 }
2925
2926 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2927 {
2928         uint32_t *savep;
2929         uint32_t attrlen,
2930                  bitmap[2] = {0};
2931         int status;
2932
2933         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2934                 goto xdr_error;
2935         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2936                 goto xdr_error;
2937         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2938                 goto xdr_error;
2939         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2940                 goto xdr_error;
2941         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2942                 goto xdr_error;
2943         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2944                 goto xdr_error;
2945         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2946                 goto xdr_error;
2947         status = verify_attr_len(xdr, savep, attrlen);
2948 xdr_error:
2949         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2950         return status;
2951 }
2952
2953 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2954 {
2955         uint32_t *savep;
2956         uint32_t attrlen,
2957                  bitmap[2] = {0};
2958         int status;
2959
2960         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2961                 goto xdr_error;
2962         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2963                 goto xdr_error;
2964         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2965                 goto xdr_error;
2966
2967         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2968                 goto xdr_error;
2969         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2970                 goto xdr_error;
2971         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2972                 goto xdr_error;
2973         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2974                 goto xdr_error;
2975         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2976                 goto xdr_error;
2977         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2978                 goto xdr_error;
2979
2980         status = verify_attr_len(xdr, savep, attrlen);
2981 xdr_error:
2982         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2983         return status;
2984 }
2985
2986 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2987 {
2988         uint32_t *savep;
2989         uint32_t attrlen,
2990                  bitmap[2] = {0};
2991         int status;
2992
2993         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2994                 goto xdr_error;
2995         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2996                 goto xdr_error;
2997         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2998                 goto xdr_error;
2999
3000         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3001                 goto xdr_error;
3002         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3003                 goto xdr_error;
3004
3005         status = verify_attr_len(xdr, savep, attrlen);
3006 xdr_error:
3007         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3008         return status;
3009 }
3010
3011 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3012 {
3013         uint32_t *savep;
3014         uint32_t attrlen,
3015                  bitmap[2] = {0},
3016                  type;
3017         int status, fmode = 0;
3018         uint64_t fileid;
3019
3020         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3021                 goto xdr_error;
3022         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3023                 goto xdr_error;
3024
3025         fattr->bitmap[0] = bitmap[0];
3026         fattr->bitmap[1] = bitmap[1];
3027
3028         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3029                 goto xdr_error;
3030
3031
3032         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3033                 goto xdr_error;
3034         fattr->type = nfs_type2fmt[type].nfs2type;
3035         fmode = nfs_type2fmt[type].mode;
3036
3037         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3038                 goto xdr_error;
3039         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3040                 goto xdr_error;
3041         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3042                 goto xdr_error;
3043         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3044                 goto xdr_error;
3045         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3046                                                 struct nfs4_fs_locations,
3047                                                 fattr))) != 0)
3048                 goto xdr_error;
3049         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3050                 goto xdr_error;
3051         fattr->mode |= fmode;
3052         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3053                 goto xdr_error;
3054         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3055                 goto xdr_error;
3056         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3057                 goto xdr_error;
3058         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3059                 goto xdr_error;
3060         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3061                 goto xdr_error;
3062         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3063                 goto xdr_error;
3064         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3065                 goto xdr_error;
3066         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3067                 goto xdr_error;
3068         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3069                 goto xdr_error;
3070         if (fattr->fileid == 0 && fileid != 0)
3071                 fattr->fileid = fileid;
3072         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3073                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3074 xdr_error:
3075         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3076         return status;
3077 }
3078
3079
3080 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3081 {
3082         uint32_t *savep;
3083         uint32_t attrlen, bitmap[2];
3084         int status;
3085
3086         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3087                 goto xdr_error;
3088         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3089                 goto xdr_error;
3090         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3091                 goto xdr_error;
3092
3093         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3094
3095         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3096                 goto xdr_error;
3097         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3098                 goto xdr_error;
3099         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3100                 goto xdr_error;
3101         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3102         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3103                 goto xdr_error;
3104         fsinfo->wtpref = fsinfo->wtmax;
3105
3106         status = verify_attr_len(xdr, savep, attrlen);
3107 xdr_error:
3108         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3109         return status;
3110 }
3111
3112 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3113 {
3114         uint32_t *p;
3115         uint32_t len;
3116         int status;
3117
3118         status = decode_op_hdr(xdr, OP_GETFH);
3119         if (status)
3120                 return status;
3121         /* Zero handle first to allow comparisons */
3122         memset(fh, 0, sizeof(*fh));
3123
3124         READ_BUF(4);
3125         READ32(len);
3126         if (len > NFS4_FHSIZE)
3127                 return -EIO;
3128         fh->size = len;
3129         READ_BUF(len);
3130         COPYMEM(fh->data, len);
3131         return 0;
3132 }
3133
3134 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3135 {
3136         int status;
3137
3138         status = decode_op_hdr(xdr, OP_LINK);
3139         if (status)
3140                 return status;
3141         return decode_change_info(xdr, cinfo);
3142 }
3143
3144 /*
3145  * We create the owner, so we know a proper owner.id length is 4.
3146  */
3147 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3148 {
3149         uint64_t offset, length, clientid;
3150         uint32_t *p;
3151         uint32_t namelen, type;
3152
3153         READ_BUF(32);
3154         READ64(offset);
3155         READ64(length);
3156         READ32(type);
3157         if (fl != NULL) {
3158                 fl->fl_start = (loff_t)offset;
3159                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3160                 if (length == ~(uint64_t)0)
3161                         fl->fl_end = OFFSET_MAX;
3162                 fl->fl_type = F_WRLCK;
3163                 if (type & 1)
3164                         fl->fl_type = F_RDLCK;
3165                 fl->fl_pid = 0;
3166         }
3167         READ64(clientid);
3168         READ32(namelen);
3169         READ_BUF(namelen);
3170         return -NFS4ERR_DENIED;
3171 }
3172
3173 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3174 {
3175         uint32_t *p;
3176         int status;
3177
3178         status = decode_op_hdr(xdr, OP_LOCK);
3179         if (status == 0) {
3180                 READ_BUF(sizeof(res->stateid.data));
3181                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3182         } else if (status == -NFS4ERR_DENIED)
3183                 return decode_lock_denied(xdr, NULL);
3184         return status;
3185 }
3186
3187 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3188 {
3189         int status;
3190         status = decode_op_hdr(xdr, OP_LOCKT);
3191         if (status == -NFS4ERR_DENIED)
3192                 return decode_lock_denied(xdr, res->denied);
3193         return status;
3194 }
3195
3196 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3197 {
3198         uint32_t *p;
3199         int status;
3200
3201         status = decode_op_hdr(xdr, OP_LOCKU);
3202         if (status == 0) {
3203                 READ_BUF(sizeof(res->stateid.data));
3204                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3205         }
3206         return status;
3207 }
3208
3209 static int decode_lookup(struct xdr_stream *xdr)
3210 {
3211         return decode_op_hdr(xdr, OP_LOOKUP);
3212 }
3213
3214 /* This is too sick! */
3215 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3216 {
3217         uint32_t *p;
3218         uint32_t limit_type, nblocks, blocksize;
3219
3220         READ_BUF(12);
3221         READ32(limit_type);
3222         switch (limit_type) {
3223                 case 1:
3224                         READ64(*maxsize);
3225                         break;
3226                 case 2:
3227                         READ32(nblocks);
3228                         READ32(blocksize);
3229                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3230         }
3231         return 0;
3232 }
3233
3234 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3235 {
3236         uint32_t *p;
3237         uint32_t delegation_type;
3238
3239         READ_BUF(4);
3240         READ32(delegation_type);
3241         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3242                 res->delegation_type = 0;
3243                 return 0;
3244         }
3245         READ_BUF(20);
3246         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3247         READ32(res->do_recall);
3248         switch (delegation_type) {
3249                 case NFS4_OPEN_DELEGATE_READ:
3250                         res->delegation_type = FMODE_READ;
3251                         break;
3252                 case NFS4_OPEN_DELEGATE_WRITE:
3253                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3254                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3255                                 return -EIO;
3256         }
3257         return decode_ace(xdr, NULL, res->server->nfs_client);
3258 }
3259
3260 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3261 {
3262         uint32_t *p;
3263         uint32_t bmlen;
3264         int status;
3265
3266         status = decode_op_hdr(xdr, OP_OPEN);
3267         if (status)
3268                 return status;
3269         READ_BUF(sizeof(res->stateid.data));
3270         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3271
3272         decode_change_info(xdr, &res->cinfo);
3273
3274         READ_BUF(8);
3275         READ32(res->rflags);
3276         READ32(bmlen);
3277         if (bmlen > 10)
3278                 goto xdr_error;
3279
3280         READ_BUF(bmlen << 2);
3281         p += bmlen;
3282         return decode_delegation(xdr, res);
3283 xdr_error:
3284         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3285         return -EIO;
3286 }
3287
3288 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3289 {
3290         uint32_t *p;
3291         int status;
3292
3293         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3294         if (status)
3295                 return status;
3296         READ_BUF(sizeof(res->stateid.data));
3297         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3298         return 0;
3299 }
3300
3301 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3302 {
3303         uint32_t *p;
3304         int status;
3305
3306         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3307         if (status)
3308                 return status;
3309         READ_BUF(sizeof(res->stateid.data));
3310         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3311         return 0;
3312 }
3313
3314 static int decode_putfh(struct xdr_stream *xdr)
3315 {
3316         return decode_op_hdr(xdr, OP_PUTFH);
3317 }
3318
3319 static int decode_putrootfh(struct xdr_stream *xdr)
3320 {
3321         return decode_op_hdr(xdr, OP_PUTROOTFH);
3322 }
3323
3324 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3325 {
3326         struct kvec *iov = req->rq_rcv_buf.head;
3327         uint32_t *p;
3328         uint32_t count, eof, recvd, hdrlen;
3329         int status;
3330
3331         status = decode_op_hdr(xdr, OP_READ);
3332         if (status)
3333                 return status;
3334         READ_BUF(8);
3335         READ32(eof);
3336         READ32(count);
3337         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3338         recvd = req->rq_rcv_buf.len - hdrlen;
3339         if (count > recvd) {
3340                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3341                                 "count %u > recvd %u\n", count, recvd);
3342                 count = recvd;
3343                 eof = 0;
3344         }
3345         xdr_read_pages(xdr, count);
3346         res->eof = eof;
3347         res->count = count;
3348         return 0;
3349 }
3350
3351 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3352 {
3353         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3354         struct page     *page = *rcvbuf->pages;
3355         struct kvec     *iov = rcvbuf->head;
3356         unsigned int    nr, pglen = rcvbuf->page_len;
3357         uint32_t        *end, *entry, *p, *kaddr;
3358         uint32_t        len, attrlen, xlen;
3359         int             hdrlen, recvd, status;
3360
3361         status = decode_op_hdr(xdr, OP_READDIR);
3362         if (status)
3363                 return status;
3364         READ_BUF(8);
3365         COPYMEM(readdir->verifier.data, 8);
3366         dprintk("%s: verifier = 0x%x%x\n",
3367                         __FUNCTION__,
3368                         ((u32 *)readdir->verifier.data)[0],
3369                         ((u32 *)readdir->verifier.data)[1]);
3370
3371
3372         hdrlen = (char *) p - (char *) iov->iov_base;
3373         recvd = rcvbuf->len - hdrlen;
3374         if (pglen > recvd)
3375                 pglen = recvd;
3376         xdr_read_pages(xdr, pglen);
3377
3378         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3379         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3380         end = p + ((pglen + readdir->pgbase) >> 2);
3381         entry = p;
3382         for (nr = 0; *p++; nr++) {
3383                 if (end - p < 3)
3384                         goto short_pkt;
3385                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3386                 p += 2;                 /* cookie */
3387                 len = ntohl(*p++);      /* filename length */
3388                 if (len > NFS4_MAXNAMLEN) {
3389                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3390                         goto err_unmap;
3391                 }
3392                 xlen = XDR_QUADLEN(len);
3393                 if (end - p < xlen + 1)
3394                         goto short_pkt;
3395                 dprintk("filename = %*s\n", len, (char *)p);
3396                 p += xlen;
3397                 len = ntohl(*p++);      /* bitmap length */
3398                 if (end - p < len + 1)
3399                         goto short_pkt;
3400                 p += len;
3401                 attrlen = XDR_QUADLEN(ntohl(*p++));
3402                 if (end - p < attrlen + 2)
3403                         goto short_pkt;
3404                 p += attrlen;           /* attributes */
3405                 entry = p;
3406         }
3407         if (!nr && (entry[0] != 0 || entry[1] == 0))
3408                 goto short_pkt;
3409 out:
3410         kunmap_atomic(kaddr, KM_USER0);
3411         return 0;
3412 short_pkt:
3413         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3414         entry[0] = entry[1] = 0;
3415         /* truncate listing ? */
3416         if (!nr) {
3417                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3418                 entry[1] = 1;
3419         }
3420         goto out;
3421 err_unmap:
3422         kunmap_atomic(kaddr, KM_USER0);
3423         return -errno_NFSERR_IO;
3424 }
3425
3426 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3427 {
3428         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3429         struct kvec *iov = rcvbuf->head;
3430         int hdrlen, len, recvd;
3431         uint32_t *p;
3432         char *kaddr;
3433         int status;
3434
3435         status = decode_op_hdr(xdr, OP_READLINK);
3436         if (status)
3437                 return status;
3438
3439         /* Convert length of symlink */
3440         READ_BUF(4);
3441         READ32(len);
3442         if (len >= rcvbuf->page_len || len <= 0) {
3443                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3444                 return -ENAMETOOLONG;
3445         }
3446         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3447         recvd = req->rq_rcv_buf.len - hdrlen;
3448         if (recvd < len) {
3449                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3450                                 "count %u > recvd %u\n", len, recvd);
3451                 return -EIO;
3452         }
3453         xdr_read_pages(xdr, len);
3454         /*
3455          * The XDR encode routine has set things up so that
3456          * the link text will be copied directly into the
3457          * buffer.  We just have to do overflow-checking,
3458          * and and null-terminate the text (the VFS expects
3459          * null-termination).
3460          */
3461         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3462         kaddr[len+rcvbuf->page_base] = '\0';
3463         kunmap_atomic(kaddr, KM_USER0);
3464         return 0;
3465 }
3466
3467 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3468 {
3469         int status;
3470
3471         status = decode_op_hdr(xdr, OP_REMOVE);
3472         if (status)
3473                 goto out;
3474         status = decode_change_info(xdr, cinfo);
3475 out:
3476         return status;
3477 }
3478
3479 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3480               struct nfs4_change_info *new_cinfo)
3481 {
3482         int status;
3483
3484         status = decode_op_hdr(xdr, OP_RENAME);
3485         if (status)
3486                 goto out;
3487         if ((status = decode_change_info(xdr, old_cinfo)))
3488                 goto out;
3489         status = decode_change_info(xdr, new_cinfo);
3490 out:
3491         return status;
3492 }
3493
3494 static int decode_renew(struct xdr_stream *xdr)
3495 {
3496         return decode_op_hdr(xdr, OP_RENEW);
3497 }
3498
3499 static int
3500 decode_restorefh(struct xdr_stream *xdr)
3501 {
3502         return decode_op_hdr(xdr, OP_RESTOREFH);
3503 }
3504
3505 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3506                 size_t *acl_len)
3507 {
3508         uint32_t *savep;
3509         uint32_t attrlen,
3510                  bitmap[2] = {0};
3511         struct kvec *iov = req->rq_rcv_buf.head;
3512         int status;
3513
3514         *acl_len = 0;
3515         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3516                 goto out;
3517         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3518                 goto out;
3519         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3520                 goto out;
3521
3522         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3523                 return -EIO;
3524         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3525                 int hdrlen, recvd;
3526
3527                 /* We ignore &savep and don't do consistency checks on
3528                  * the attr length.  Let userspace figure it out.... */
3529                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3530                 recvd = req->rq_rcv_buf.len - hdrlen;
3531                 if (attrlen > recvd) {
3532                         printk(KERN_WARNING "NFS: server cheating in getattr"
3533                                         " acl reply: attrlen %u > recvd %u\n",
3534                                         attrlen, recvd);
3535                         return -EINVAL;
3536                 }
3537                 xdr_read_pages(xdr, attrlen);
3538                 *acl_len = attrlen;
3539         } else
3540                 status = -EOPNOTSUPP;
3541
3542 out:
3543         return status;
3544 }
3545
3546 static int
3547 decode_savefh(struct xdr_stream *xdr)
3548 {
3549         return decode_op_hdr(xdr, OP_SAVEFH);
3550 }
3551
3552 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3553 {
3554         uint32_t *p;
3555         uint32_t bmlen;
3556         int status;
3557
3558
3559         status = decode_op_hdr(xdr, OP_SETATTR);
3560         if (status)
3561                 return status;
3562         READ_BUF(4);
3563         READ32(bmlen);
3564         READ_BUF(bmlen << 2);
3565         return 0;
3566 }
3567
3568 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3569 {
3570         uint32_t *p;
3571         uint32_t opnum;
3572         int32_t nfserr;
3573
3574         READ_BUF(8);
3575         READ32(opnum);
3576         if (opnum != OP_SETCLIENTID) {
3577                 printk(KERN_NOTICE
3578                                 "nfs4_decode_setclientid: Server returned operation"
3579                                 " %d\n", opnum);
3580                 return -EIO;
3581         }
3582         READ32(nfserr);
3583         if (nfserr == NFS_OK) {
3584                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3585                 READ64(clp->cl_clientid);
3586                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3587         } else if (nfserr == NFSERR_CLID_INUSE) {
3588                 uint32_t len;
3589
3590                 /* skip netid string */
3591                 READ_BUF(4);
3592                 READ32(len);
3593                 READ_BUF(len);
3594
3595                 /* skip uaddr string */
3596                 READ_BUF(4);
3597                 READ32(len);
3598                 READ_BUF(len);
3599                 return -NFSERR_CLID_INUSE;
3600         } else
3601                 return -nfs4_stat_to_errno(nfserr);
3602
3603         return 0;
3604 }
3605
3606 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3607 {
3608         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3609 }
3610
3611 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3612 {
3613         uint32_t *p;
3614         int status;
3615
3616         status = decode_op_hdr(xdr, OP_WRITE);
3617         if (status)
3618                 return status;
3619
3620         READ_BUF(16);
3621         READ32(res->count);
3622         READ32(res->verf->committed);
3623         COPYMEM(res->verf->verifier, 8);
3624         return 0;
3625 }
3626
3627 static int decode_delegreturn(struct xdr_stream *xdr)
3628 {
3629         return decode_op_hdr(xdr, OP_DELEGRETURN);
3630 }
3631
3632 /*
3633  * Decode OPEN_DOWNGRADE response
3634  */
3635 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3636 {
3637         struct xdr_stream xdr;
3638         struct compound_hdr hdr;
3639         int status;
3640
3641         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3642         status = decode_compound_hdr(&xdr, &hdr);
3643         if (status)
3644                 goto out;
3645         status = decode_putfh(&xdr);
3646         if (status)
3647                 goto out;
3648         status = decode_open_downgrade(&xdr, res);
3649         if (status != 0)
3650                 goto out;
3651         decode_getfattr(&xdr, res->fattr, res->server);
3652 out:
3653         return status;
3654 }
3655
3656 /*
3657  * END OF "GENERIC" DECODE ROUTINES.
3658  */
3659
3660 /*
3661  * Decode ACCESS response
3662  */
3663 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3664 {
3665         struct xdr_stream xdr;
3666         struct compound_hdr hdr;
3667         int status;
3668
3669         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3670         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3671                 goto out;
3672         if ((status = decode_putfh(&xdr)) == 0)
3673                 status = decode_access(&xdr, res);
3674 out:
3675         return status;
3676 }
3677
3678 /*
3679  * Decode LOOKUP response
3680  */
3681 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3682 {
3683         struct xdr_stream xdr;
3684         struct compound_hdr hdr;
3685         int status;
3686
3687         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3688         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3689                 goto out;
3690         if ((status = decode_putfh(&xdr)) != 0)
3691                 goto out;
3692         if ((status = decode_lookup(&xdr)) != 0)
3693                 goto out;
3694         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3695                 goto out;
3696         status = decode_getfattr(&xdr, res->fattr, res->server);
3697 out:
3698         return status;
3699 }
3700
3701 /*
3702  * Decode LOOKUP_ROOT response
3703  */
3704 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3705 {
3706         struct xdr_stream xdr;
3707         struct compound_hdr hdr;
3708         int status;
3709
3710         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3711         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3712                 goto out;
3713         if ((status = decode_putrootfh(&xdr)) != 0)
3714                 goto out;
3715         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3716                 status = decode_getfattr(&xdr, res->fattr, res->server);
3717 out:
3718         return status;
3719 }
3720
3721 /*
3722  * Decode REMOVE response
3723  */
3724 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3725 {
3726         struct xdr_stream xdr;
3727         struct compound_hdr hdr;
3728         int status;
3729
3730         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3731         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3732                 goto out;
3733         if ((status = decode_putfh(&xdr)) != 0)
3734                 goto out;
3735         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3736                 goto out;
3737         decode_getfattr(&xdr, res->dir_attr, res->server);
3738 out:
3739         return status;
3740 }
3741
3742 /*
3743  * Decode RENAME response
3744  */
3745 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3746 {
3747         struct xdr_stream xdr;
3748         struct compound_hdr hdr;
3749         int status;
3750
3751         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3752         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3753                 goto out;
3754         if ((status = decode_putfh(&xdr)) != 0)
3755                 goto out;
3756         if ((status = decode_savefh(&xdr)) != 0)
3757                 goto out;
3758         if ((status = decode_putfh(&xdr)) != 0)
3759                 goto out;
3760         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3761                 goto out;
3762         /* Current FH is target directory */
3763         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3764                 goto out;
3765         if ((status = decode_restorefh(&xdr)) != 0)
3766                 goto out;
3767         decode_getfattr(&xdr, res->old_fattr, res->server);
3768 out:
3769         return status;
3770 }
3771
3772 /*
3773  * Decode LINK response
3774  */
3775 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3776 {
3777         struct xdr_stream xdr;
3778         struct compound_hdr hdr;
3779         int status;
3780
3781         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3782         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3783                 goto out;
3784         if ((status = decode_putfh(&xdr)) != 0)
3785                 goto out;
3786         if ((status = decode_savefh(&xdr)) != 0)
3787                 goto out;
3788         if ((status = decode_putfh(&xdr)) != 0)
3789                 goto out;
3790         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3791                 goto out;
3792         /*
3793          * Note order: OP_LINK leaves the directory as the current
3794          *             filehandle.
3795          */
3796         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3797                 goto out;
3798         if ((status = decode_restorefh(&xdr)) != 0)
3799                 goto out;
3800         decode_getfattr(&xdr, res->fattr, res->server);
3801 out:
3802         return status;
3803 }
3804
3805 /*
3806  * Decode CREATE response
3807  */
3808 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3809 {
3810         struct xdr_stream xdr;
3811         struct compound_hdr hdr;
3812         int status;
3813
3814         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3815         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3816                 goto out;
3817         if ((status = decode_putfh(&xdr)) != 0)
3818                 goto out;
3819         if ((status = decode_savefh(&xdr)) != 0)
3820                 goto out;
3821         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3822                 goto out;
3823         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3824                 goto out;
3825         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3826                 goto out;
3827         if ((status = decode_restorefh(&xdr)) != 0)
3828                 goto out;
3829         decode_getfattr(&xdr, res->dir_fattr, res->server);
3830 out:
3831         return status;
3832 }
3833
3834 /*
3835  * Decode SYMLINK response
3836  */
3837 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3838 {
3839         return nfs4_xdr_dec_create(rqstp, p, res);
3840 }
3841
3842 /*
3843  * Decode GETATTR response
3844  */
3845 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_res *res)
3846 {
3847         struct xdr_stream xdr;
3848         struct compound_hdr hdr;
3849         int status;
3850
3851         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3852         status = decode_compound_hdr(&xdr, &hdr);
3853         if (status)
3854                 goto out;
3855         status = decode_putfh(&xdr);
3856         if (status)
3857                 goto out;
3858         status = decode_getfattr(&xdr, res->fattr, res->server);
3859 out:
3860         return status;
3861
3862 }
3863
3864 /*
3865  * Encode an SETACL request
3866  */
3867 static int
3868 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3869 {
3870         struct xdr_stream xdr;
3871         struct compound_hdr hdr = {
3872                 .nops   = 2,
3873         };
3874         int status;
3875
3876         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3877         encode_compound_hdr(&xdr, &hdr);
3878         status = encode_putfh(&xdr, args->fh);
3879         if (status)
3880                 goto out;
3881         status = encode_setacl(&xdr, args);
3882 out:
3883         return status;
3884 }
3885 /*
3886  * Decode SETACL response
3887  */
3888 static int
3889 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3890 {
3891         struct xdr_stream xdr;
3892         struct compound_hdr hdr;
3893         int status;
3894
3895         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3896         status = decode_compound_hdr(&xdr, &hdr);
3897         if (status)
3898                 goto out;
3899         status = decode_putfh(&xdr);
3900         if (status)
3901                 goto out;
3902         status = decode_setattr(&xdr, res);
3903 out:
3904         return status;
3905 }
3906
3907 /*
3908  * Decode GETACL response
3909  */
3910 static int
3911 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3912 {
3913         struct xdr_stream xdr;
3914         struct compound_hdr hdr;
3915         int status;
3916
3917         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3918         status = decode_compound_hdr(&xdr, &hdr);
3919         if (status)
3920                 goto out;
3921         status = decode_putfh(&xdr);
3922         if (status)
3923                 goto out;
3924         status = decode_getacl(&xdr, rqstp, acl_len);
3925
3926 out:
3927         return status;
3928 }
3929
3930 /*
3931  * Decode CLOSE response
3932  */
3933 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3934 {
3935         struct xdr_stream xdr;
3936         struct compound_hdr hdr;
3937         int status;
3938
3939         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3940         status = decode_compound_hdr(&xdr, &hdr);
3941         if (status)
3942                 goto out;
3943         status = decode_putfh(&xdr);
3944         if (status)
3945                 goto out;
3946         status = decode_close(&xdr, res);
3947         if (status != 0)
3948                 goto out;
3949         /*
3950          * Note: Server may do delete on close for this file
3951          *      in which case the getattr call will fail with
3952          *      an ESTALE error. Shouldn't be a problem,
3953          *      though, since fattr->valid will remain unset.
3954          */
3955         decode_getfattr(&xdr, res->fattr, res->server);
3956 out:
3957         return status;
3958 }
3959
3960 /*
3961  * Decode OPEN response
3962  */
3963 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3964 {
3965         struct xdr_stream xdr;
3966         struct compound_hdr hdr;
3967         int status;
3968
3969         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3970         status = decode_compound_hdr(&xdr, &hdr);
3971         if (status)
3972                 goto out;
3973         status = decode_putfh(&xdr);
3974         if (status)
3975                 goto out;
3976         status = decode_savefh(&xdr);
3977         if (status)
3978                 goto out;
3979         status = decode_open(&xdr, res);
3980         if (status)
3981                 goto out;
3982         status = decode_getfh(&xdr, &res->fh);
3983         if (status)
3984                 goto out;
3985         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3986                 goto out;
3987         if ((status = decode_restorefh(&xdr)) != 0)
3988                 goto out;
3989         decode_getfattr(&xdr, res->dir_attr, res->server);
3990 out:
3991         return status;
3992 }
3993
3994 /*
3995  * Decode OPEN_CONFIRM response
3996  */
3997 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3998 {
3999         struct xdr_stream xdr;
4000         struct compound_hdr hdr;
4001         int status;
4002
4003         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4004         status = decode_compound_hdr(&xdr, &hdr);
4005         if (status)
4006                 goto out;
4007         status = decode_putfh(&xdr);
4008         if (status)
4009                 goto out;
4010         status = decode_open_confirm(&xdr, res);
4011 out:
4012         return status;
4013 }
4014
4015 /*
4016  * Decode OPEN response
4017  */
4018 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
4019 {
4020         struct xdr_stream xdr;
4021         struct compound_hdr hdr;
4022         int status;
4023
4024         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4025         status = decode_compound_hdr(&xdr, &hdr);
4026         if (status)
4027                 goto out;
4028         status = decode_putfh(&xdr);
4029         if (status)
4030                 goto out;
4031         status = decode_open(&xdr, res);
4032         if (status)
4033                 goto out;
4034         decode_getfattr(&xdr, res->f_attr, res->server);
4035 out:
4036         return status;
4037 }
4038
4039 /*
4040  * Decode SETATTR response
4041  */
4042 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
4043 {
4044         struct xdr_stream xdr;
4045         struct compound_hdr hdr;
4046         int status;
4047
4048         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4049         status = decode_compound_hdr(&xdr, &hdr);
4050         if (status)
4051                 goto out;
4052         status = decode_putfh(&xdr);
4053         if (status)
4054                 goto out;
4055         status = decode_setattr(&xdr, res);
4056         if (status)
4057                 goto out;
4058         status = decode_getfattr(&xdr, res->fattr, res->server);
4059         if (status == NFS4ERR_DELAY)
4060                 status = 0;
4061 out:
4062         return status;
4063 }
4064
4065 /*
4066  * Decode LOCK response
4067  */
4068 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lock_res *res)
4069 {
4070         struct xdr_stream xdr;
4071         struct compound_hdr hdr;
4072         int status;
4073
4074         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4075         status = decode_compound_hdr(&xdr, &hdr);
4076         if (status)
4077                 goto out;
4078         status = decode_putfh(&xdr);
4079         if (status)
4080                 goto out;
4081         status = decode_lock(&xdr, res);
4082 out:
4083         return status;
4084 }
4085
4086 /*
4087  * Decode LOCKT response
4088  */
4089 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockt_res *res)
4090 {
4091         struct xdr_stream xdr;
4092         struct compound_hdr hdr;
4093         int status;
4094
4095         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4096         status = decode_compound_hdr(&xdr, &hdr);
4097         if (status)
4098                 goto out;
4099         status = decode_putfh(&xdr);
4100         if (status)
4101                 goto out;
4102         status = decode_lockt(&xdr, res);
4103 out:
4104         return status;
4105 }
4106
4107 /*
4108  * Decode LOCKU response
4109  */
4110 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_locku_res *res)
4111 {
4112         struct xdr_stream xdr;
4113         struct compound_hdr hdr;
4114         int status;
4115
4116         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4117         status = decode_compound_hdr(&xdr, &hdr);
4118         if (status)
4119                 goto out;
4120         status = decode_putfh(&xdr);
4121         if (status)
4122                 goto out;
4123         status = decode_locku(&xdr, res);
4124 out:
4125         return status;
4126 }
4127
4128 /*
4129  * Decode READLINK response
4130  */
4131 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
4132 {
4133         struct xdr_stream xdr;
4134         struct compound_hdr hdr;
4135         int status;
4136
4137         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4138         status = decode_compound_hdr(&xdr, &hdr);
4139         if (status)
4140                 goto out;
4141         status = decode_putfh(&xdr);
4142         if (status)
4143                 goto out;
4144         status = decode_readlink(&xdr, rqstp);
4145 out:
4146         return status;
4147 }
4148
4149 /*
4150  * Decode READDIR response
4151  */
4152 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
4153 {
4154         struct xdr_stream xdr;
4155         struct compound_hdr hdr;
4156         int status;
4157
4158         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4159         status = decode_compound_hdr(&xdr, &hdr);
4160         if (status)
4161                 goto out;
4162         status = decode_putfh(&xdr);
4163         if (status)
4164                 goto out;
4165         status = decode_readdir(&xdr, rqstp, res);
4166 out:
4167         return status;
4168 }
4169
4170 /*
4171  * Decode Read response
4172  */
4173 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
4174 {
4175         struct xdr_stream xdr;
4176         struct compound_hdr hdr;
4177         int status;
4178
4179         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4180         status = decode_compound_hdr(&xdr, &hdr);
4181         if (status)
4182                 goto out;
4183         status = decode_putfh(&xdr);
4184         if (status)
4185                 goto out;
4186         status = decode_read(&xdr, rqstp, res);
4187         if (!status)
4188                 status = res->count;
4189 out:
4190         return status;
4191 }
4192
4193 /*
4194  * Decode WRITE response
4195  */
4196 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4197 {
4198         struct xdr_stream xdr;
4199         struct compound_hdr hdr;
4200         int status;
4201
4202         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4203         status = decode_compound_hdr(&xdr, &hdr);
4204         if (status)
4205                 goto out;
4206         status = decode_putfh(&xdr);
4207         if (status)
4208                 goto out;
4209         status = decode_write(&xdr, res);
4210         if (status)
4211                 goto out;
4212         decode_getfattr(&xdr, res->fattr, res->server);
4213         if (!status)
4214                 status = res->count;
4215 out:
4216         return status;
4217 }
4218
4219 /*
4220  * Decode COMMIT response
4221  */
4222 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4223 {
4224         struct xdr_stream xdr;
4225         struct compound_hdr hdr;
4226         int status;
4227
4228         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4229         status = decode_compound_hdr(&xdr, &hdr);
4230         if (status)
4231                 goto out;
4232         status = decode_putfh(&xdr);
4233         if (status)
4234                 goto out;
4235         status = decode_commit(&xdr, res);
4236         if (status)
4237                 goto out;
4238         decode_getfattr(&xdr, res->fattr, res->server);
4239 out:
4240         return status;
4241 }
4242
4243 /*
4244  * FSINFO request
4245  */
4246 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4247 {
4248         struct xdr_stream xdr;
4249         struct compound_hdr hdr;
4250         int status;
4251
4252         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4253         status = decode_compound_hdr(&xdr, &hdr);
4254         if (!status)
4255                 status = decode_putfh(&xdr);
4256         if (!status)
4257                 status = decode_fsinfo(&xdr, fsinfo);
4258         if (!status)
4259                 status = -nfs4_stat_to_errno(hdr.status);
4260         return status;
4261 }
4262
4263 /*
4264  * PATHCONF request
4265  */
4266 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4267 {
4268         struct xdr_stream xdr;
4269         struct compound_hdr hdr;
4270         int status;
4271
4272         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4273         status = decode_compound_hdr(&xdr, &hdr);
4274         if (!status)
4275                 status = decode_putfh(&xdr);
4276         if (!status)
4277                 status = decode_pathconf(&xdr, pathconf);
4278         return status;
4279 }
4280
4281 /*
4282  * STATFS request
4283  */
4284 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4285 {
4286         struct xdr_stream xdr;
4287         struct compound_hdr hdr;
4288         int status;
4289
4290         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4291         status = decode_compound_hdr(&xdr, &hdr);
4292         if (!status)
4293                 status = decode_putfh(&xdr);
4294         if (!status)
4295                 status = decode_statfs(&xdr, fsstat);
4296         return status;
4297 }
4298
4299 /*
4300  * GETATTR_BITMAP request
4301  */
4302 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4303 {
4304         struct xdr_stream xdr;
4305         struct compound_hdr hdr;
4306         int status;
4307
4308         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4309         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4310                 goto out;
4311         if ((status = decode_putfh(&xdr)) != 0)
4312                 goto out;
4313         status = decode_server_caps(&xdr, res);
4314 out:
4315         return status;
4316 }
4317
4318 /*
4319  * Decode RENEW response
4320  */
4321 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4322 {
4323         struct xdr_stream xdr;
4324         struct compound_hdr hdr;
4325         int status;
4326
4327         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4328         status = decode_compound_hdr(&xdr, &hdr);
4329         if (!status)
4330                 status = decode_renew(&xdr);
4331         return status;
4332 }
4333
4334 /*
4335  * a SETCLIENTID request
4336  */
4337 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4338                 struct nfs_client *clp)
4339 {
4340         struct xdr_stream xdr;
4341         struct compound_hdr hdr;
4342         int status;
4343
4344         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4345         status = decode_compound_hdr(&xdr, &hdr);
4346         if (!status)
4347                 status = decode_setclientid(&xdr, clp);
4348         if (!status)
4349                 status = -nfs4_stat_to_errno(hdr.status);
4350         return status;
4351 }
4352
4353 /*
4354  * a SETCLIENTID_CONFIRM request
4355  */
4356 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4357 {
4358         struct xdr_stream xdr;
4359         struct compound_hdr hdr;
4360         int status;
4361
4362         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4363         status = decode_compound_hdr(&xdr, &hdr);
4364         if (!status)
4365                 status = decode_setclientid_confirm(&xdr);
4366         if (!status)
4367                 status = decode_putrootfh(&xdr);
4368         if (!status)
4369                 status = decode_fsinfo(&xdr, fsinfo);
4370         if (!status)
4371                 status = -nfs4_stat_to_errno(hdr.status);
4372         return status;
4373 }
4374
4375 /*
4376  * DELEGRETURN request
4377  */
4378 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_delegreturnres *res)
4379 {
4380         struct xdr_stream xdr;
4381         struct compound_hdr hdr;
4382         int status;
4383
4384         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4385         status = decode_compound_hdr(&xdr, &hdr);
4386         if (status != 0)
4387                 goto out;
4388         status = decode_putfh(&xdr);
4389         if (status != 0)
4390                 goto out;
4391         status = decode_delegreturn(&xdr);
4392         decode_getfattr(&xdr, res->fattr, res->server);
4393 out:
4394         return status;
4395 }
4396
4397 /*
4398  * FS_LOCATIONS request
4399  */
4400 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs_locations *res)
4401 {
4402         struct xdr_stream xdr;
4403         struct compound_hdr hdr;
4404         int status;
4405
4406         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4407         status = decode_compound_hdr(&xdr, &hdr);
4408         if (status != 0)
4409                 goto out;
4410         if ((status = decode_putfh(&xdr)) != 0)
4411                 goto out;
4412         if ((status = decode_lookup(&xdr)) != 0)
4413                 goto out;
4414         xdr_enter_page(&xdr, PAGE_SIZE);
4415         status = decode_getfattr(&xdr, &res->fattr, res->server);
4416 out:
4417         return status;
4418 }
4419
4420 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4421 {
4422         uint32_t bitmap[2] = {0};
4423         uint32_t len;
4424
4425         if (!*p++) {
4426                 if (!*p)
4427                         return ERR_PTR(-EAGAIN);
4428                 entry->eof = 1;
4429                 return ERR_PTR(-EBADCOOKIE);
4430         }
4431
4432         entry->prev_cookie = entry->cookie;
4433         p = xdr_decode_hyper(p, &entry->cookie);
4434         entry->len = ntohl(*p++);
4435         entry->name = (const char *) p;
4436         p += XDR_QUADLEN(entry->len);
4437
4438         /*
4439          * In case the server doesn't return an inode number,
4440          * we fake one here.  (We don't use inode number 0,
4441          * since glibc seems to choke on it...)
4442          */
4443         entry->ino = 1;
4444
4445         len = ntohl(*p++);              /* bitmap length */
4446         if (len-- > 0) {
4447                 bitmap[0] = ntohl(*p++);
4448                 if (len-- > 0) {
4449                         bitmap[1] = ntohl(*p++);
4450                         p += len;
4451                 }
4452         }
4453         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4454         if (len > 0) {
4455                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4456                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4457                         /* Ignore the return value of rdattr_error for now */
4458                         p++;
4459                         len--;
4460                 }
4461                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4462                         xdr_decode_hyper(p, &entry->ino);
4463                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4464                         xdr_decode_hyper(p, &entry->ino);
4465                 p += len;
4466         }
4467
4468         entry->eof = !p[0] && p[1];
4469         return p;
4470 }
4471
4472 /*
4473  * We need to translate between nfs status return values and
4474  * the local errno values which may not be the same.
4475  */
4476 static struct {
4477         int stat;
4478         int errno;
4479 } nfs_errtbl[] = {
4480         { NFS4_OK,              0               },
4481         { NFS4ERR_PERM,         EPERM           },
4482         { NFS4ERR_NOENT,        ENOENT          },
4483         { NFS4ERR_IO,           errno_NFSERR_IO },
4484         { NFS4ERR_NXIO,         ENXIO           },
4485         { NFS4ERR_ACCESS,       EACCES          },
4486         { NFS4ERR_EXIST,        EEXIST          },
4487         { NFS4ERR_XDEV,         EXDEV           },
4488         { NFS4ERR_NOTDIR,       ENOTDIR         },
4489         { NFS4ERR_ISDIR,        EISDIR          },
4490         { NFS4ERR_INVAL,        EINVAL          },
4491         { NFS4ERR_FBIG,         EFBIG           },
4492         { NFS4ERR_NOSPC,        ENOSPC          },
4493         { NFS4ERR_ROFS,         EROFS           },
4494         { NFS4ERR_MLINK,        EMLINK          },
4495         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4496         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4497         { NFS4ERR_DQUOT,        EDQUOT          },
4498         { NFS4ERR_STALE,        ESTALE          },
4499         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4500         { NFS4ERR_BADOWNER,     EINVAL          },
4501         { NFS4ERR_BADNAME,      EINVAL          },
4502         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4503         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4504         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4505         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4506         { NFS4ERR_BADTYPE,      EBADTYPE        },
4507         { NFS4ERR_LOCKED,       EAGAIN          },
4508         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4509         { NFS4ERR_SYMLINK,      ELOOP           },
4510         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4511         { NFS4ERR_DEADLOCK,     EDEADLK         },
4512         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4513                                                     * to be handled by a
4514                                                     * middle-layer.
4515                                                     */
4516         { -1,                   EIO             }
4517 };
4518
4519 /*
4520  * Convert an NFS error code to a local one.
4521  * This one is used jointly by NFSv2 and NFSv3.
4522  */
4523 static int
4524 nfs4_stat_to_errno(int stat)
4525 {
4526         int i;
4527         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4528                 if (nfs_errtbl[i].stat == stat)
4529                         return nfs_errtbl[i].errno;
4530         }
4531         if (stat <= 10000 || stat > 10100) {
4532                 /* The server is looney tunes. */
4533                 return ESERVERFAULT;
4534         }
4535         /* If we cannot translate the error, the recovery routines should
4536          * handle it.
4537          * Note: remaining NFSv4 error codes have values > 10000, so should
4538          * not conflict with native Linux error codes.
4539          */
4540         return stat;
4541 }
4542
4543 #ifndef MAX
4544 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4545 #endif
4546
4547 #define PROC(proc, argtype, restype)                            \
4548 [NFSPROC4_CLNT_##proc] = {                                      \
4549         .p_proc   = NFSPROC4_COMPOUND,                          \
4550         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4551         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4552         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4553         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4554         .p_name   = #proc,                                      \
4555     }
4556
4557 struct rpc_procinfo     nfs4_procedures[] = {
4558   PROC(READ,            enc_read,       dec_read),
4559   PROC(WRITE,           enc_write,      dec_write),
4560   PROC(COMMIT,          enc_commit,     dec_commit),
4561   PROC(OPEN,            enc_open,       dec_open),
4562   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4563   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4564   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4565   PROC(CLOSE,           enc_close,      dec_close),
4566   PROC(SETATTR,         enc_setattr,    dec_setattr),
4567   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4568   PROC(RENEW,           enc_renew,      dec_renew),
4569   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4570   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4571   PROC(LOCK,            enc_lock,       dec_lock),
4572   PROC(LOCKT,           enc_lockt,      dec_lockt),
4573   PROC(LOCKU,           enc_locku,      dec_locku),
4574   PROC(ACCESS,          enc_access,     dec_access),
4575   PROC(GETATTR,         enc_getattr,    dec_getattr),
4576   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4577   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4578   PROC(REMOVE,          enc_remove,     dec_remove),
4579   PROC(RENAME,          enc_rename,     dec_rename),
4580   PROC(LINK,            enc_link,       dec_link),
4581   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4582   PROC(CREATE,          enc_create,     dec_create),
4583   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4584   PROC(STATFS,          enc_statfs,     dec_statfs),
4585   PROC(READLINK,        enc_readlink,   dec_readlink),
4586   PROC(READDIR,         enc_readdir,    dec_readdir),
4587   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4588   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4589   PROC(GETACL,          enc_getacl,     dec_getacl),
4590   PROC(SETACL,          enc_setacl,     dec_setacl),
4591   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4592 };
4593
4594 struct rpc_version              nfs_version4 = {
4595         .number                 = 4,
4596         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4597         .procs                  = nfs4_procedures
4598 };
4599
4600 /*
4601  * Local variables:
4602  *  c-basic-offset: 8
4603  * End:
4604  */