fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define owner_id_maxsz          (1 + 1)
  74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define op_encode_hdr_maxsz     (1)
  77 #define op_decode_hdr_maxsz     (2)
  78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  79                                 (NFS4_FHSIZE >> 2))
  80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  85                                 ((3+NFS4_FHSIZE) >> 2))
  86 #define nfs4_fattr_bitmap_maxsz 3
  87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  90 /* This is based on getfattr, which uses the most attributes: */
  91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
  93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  94                                 nfs4_fattr_value_maxsz)
  95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
  97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
  98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
  99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 104 #define encode_setclientid_maxsz \
 105                                 (op_encode_hdr_maxsz + \
 106                                 4 /*server->ip_addr*/ + \
 107                                 1 /*Netid*/ + \
 108                                 6 /*uaddr*/ + \
 109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 110 #define decode_setclientid_maxsz \
 111                                 (op_decode_hdr_maxsz + \
 112                                 2 + \
 113                                 1024) /* large value for CLID_INUSE */
 114 #define encode_setclientid_confirm_maxsz \
 115                                 (op_encode_hdr_maxsz + \
 116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 117 #define decode_setclientid_confirm_maxsz \
 118                                 (op_decode_hdr_maxsz)
 119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 122                                 nfs4_name_maxsz)
 123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 124                                 2 * nfs4_name_maxsz)
 125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 127                                 nfs4_name_maxsz)
 128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 130                                 1 + nfs4_name_maxsz + \
 131                                 nfs4_path_maxsz + \
 132                                 nfs4_fattr_maxsz)
 133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 135                                 2 + nfs4_name_maxsz + \
 136                                 nfs4_fattr_maxsz)
 137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 143                                 encode_putfh_maxsz + \
 144                                 op_encode_hdr_maxsz + 7)
 145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 146                                 decode_putfh_maxsz + \
 147                                 op_decode_hdr_maxsz + 2)
 148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 149                                 encode_putfh_maxsz + \
 150                                 op_encode_hdr_maxsz)
 151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 152                                 decode_putfh_maxsz + \
 153                                 op_decode_hdr_maxsz)
 154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 155                                 encode_putfh_maxsz + \
 156                                 op_encode_hdr_maxsz + 9)
 157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 158                                 decode_putfh_maxsz + \
 159                                 op_decode_hdr_maxsz + 2)
 160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 161                                 encode_putfh_maxsz + \
 162                                 op_encode_hdr_maxsz + 8 + \
 163                                 encode_getattr_maxsz)
 164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 165                                 decode_putfh_maxsz + \
 166                                 op_decode_hdr_maxsz + 4 + \
 167                                 decode_getattr_maxsz)
 168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 169                                 encode_putfh_maxsz + \
 170                                 op_encode_hdr_maxsz + 3 + \
 171                                 encode_getattr_maxsz)
 172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 173                                 decode_putfh_maxsz + \
 174                                 op_decode_hdr_maxsz + 2 + \
 175                                 decode_getattr_maxsz)
 176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 177                                 encode_putfh_maxsz + \
 178                                 op_encode_hdr_maxsz + \
 179                                 13 + 3 + 2 + 64 + \
 180                                 encode_getattr_maxsz + \
 181                                 encode_getfh_maxsz)
 182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 183                                 decode_putfh_maxsz + \
 184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 185                                 decode_getattr_maxsz + \
 186                                 decode_getfh_maxsz)
 187 #define NFS4_enc_open_confirm_sz      \
 188                                 (compound_encode_hdr_maxsz + \
 189                                 encode_putfh_maxsz + \
 190                                 op_encode_hdr_maxsz + 5)
 191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 192                                         decode_putfh_maxsz + \
 193                                         op_decode_hdr_maxsz + 4)
 194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 195                                         encode_putfh_maxsz + \
 196                                         op_encode_hdr_maxsz + \
 197                                         11)
 198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 199                                         decode_putfh_maxsz + \
 200                                         op_decode_hdr_maxsz + \
 201                                         4 + 5 + 2 + 3)
 202 #define NFS4_enc_open_downgrade_sz \
 203                                 (compound_encode_hdr_maxsz + \
 204                                 encode_putfh_maxsz + \
 205                                 op_encode_hdr_maxsz + 7 + \
 206                                 encode_getattr_maxsz)
 207 #define NFS4_dec_open_downgrade_sz \
 208                                 (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 op_decode_hdr_maxsz + 4 + \
 211                                 decode_getattr_maxsz)
 212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 213                                 encode_putfh_maxsz + \
 214                                 op_encode_hdr_maxsz + 5 + \
 215                                 encode_getattr_maxsz)
 216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 217                                 decode_putfh_maxsz + \
 218                                 op_decode_hdr_maxsz + 4 + \
 219                                 decode_getattr_maxsz)
 220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 221                                 encode_putfh_maxsz + \
 222                                 op_encode_hdr_maxsz + 4 + \
 223                                 nfs4_fattr_maxsz + \
 224                                 encode_getattr_maxsz)
 225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 226                                 decode_putfh_maxsz + \
 227                                 op_decode_hdr_maxsz + 3)
 228 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 229                                 encode_putfh_maxsz + \
 230                                 encode_fsinfo_maxsz)
 231 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 232                                 decode_putfh_maxsz + \
 233                                 decode_fsinfo_maxsz)
 234 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 235                                 encode_renew_maxsz)
 236 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 237                                 decode_renew_maxsz)
 238 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 239                                 encode_setclientid_maxsz)
 240 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 241                                 decode_setclientid_maxsz)
 242 #define NFS4_enc_setclientid_confirm_sz \
 243                                 (compound_encode_hdr_maxsz + \
 244                                 encode_setclientid_confirm_maxsz + \
 245                                 encode_putrootfh_maxsz + \
 246                                 encode_fsinfo_maxsz)
 247 #define NFS4_dec_setclientid_confirm_sz \
 248                                 (compound_decode_hdr_maxsz + \
 249                                 decode_setclientid_confirm_maxsz + \
 250                                 decode_putrootfh_maxsz + \
 251                                 decode_fsinfo_maxsz)
 252 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 253                                 encode_putfh_maxsz + \
 254                                 encode_getattr_maxsz + \
 255                                 op_encode_hdr_maxsz + \
 256                                 1 + 1 + 2 + 2 + \
 257                                 1 + 4 + 1 + 2 + \
 258                                 owner_id_maxsz)
 259 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 260                                 decode_putfh_maxsz + \
 261                                 decode_getattr_maxsz + \
 262                                 op_decode_hdr_maxsz + \
 263                                 2 + 2 + 1 + 2 + \
 264                                 owner_id_maxsz)
 265 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 266                                 encode_putfh_maxsz + \
 267                                 encode_getattr_maxsz + \
 268                                 op_encode_hdr_maxsz + \
 269                                 1 + 2 + 2 + 2 + \
 270                                 owner_id_maxsz)
 271 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 272 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 273                                 encode_putfh_maxsz + \
 274                                 encode_getattr_maxsz + \
 275                                 op_encode_hdr_maxsz + \
 276                                 1 + 1 + 4 + 2 + 2)
 277 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 278                                 decode_putfh_maxsz + \
 279                                 decode_getattr_maxsz + \
 280                                 op_decode_hdr_maxsz + 4)
 281 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 282                                 encode_putfh_maxsz + \
 283                                 op_encode_hdr_maxsz + 1)
 284 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 op_decode_hdr_maxsz + 2)
 287 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 288                                 encode_putfh_maxsz + \
 289                                 encode_getattr_maxsz)
 290 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 291                                 decode_putfh_maxsz + \
 292                                 decode_getattr_maxsz)
 293 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 294                                 encode_putfh_maxsz + \
 295                                 encode_lookup_maxsz + \
 296                                 encode_getattr_maxsz + \
 297                                 encode_getfh_maxsz)
 298 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 299                                 decode_putfh_maxsz + \
 300                                 op_decode_hdr_maxsz + \
 301                                 decode_getattr_maxsz + \
 302                                 decode_getfh_maxsz)
 303 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 304                                 encode_putrootfh_maxsz + \
 305                                 encode_getattr_maxsz + \
 306                                 encode_getfh_maxsz)
 307 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 308                                 decode_putrootfh_maxsz + \
 309                                 decode_getattr_maxsz + \
 310                                 decode_getfh_maxsz)
 311 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_remove_maxsz + \
 314                                 encode_getattr_maxsz)
 315 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 op_decode_hdr_maxsz + 5 + \
 318                                 decode_getattr_maxsz)
 319 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_savefh_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_rename_maxsz + \
 324                                 encode_getattr_maxsz + \
 325                                 encode_restorefh_maxsz + \
 326                                 encode_getattr_maxsz)
 327 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 328                                 decode_putfh_maxsz + \
 329                                 decode_savefh_maxsz + \
 330                                 decode_putfh_maxsz + \
 331                                 decode_rename_maxsz + \
 332                                 decode_getattr_maxsz + \
 333                                 decode_restorefh_maxsz + \
 334                                 decode_getattr_maxsz)
 335 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_savefh_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_link_maxsz + \
 340                                 decode_getattr_maxsz + \
 341                                 encode_restorefh_maxsz + \
 342                                 decode_getattr_maxsz)
 343 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 344                                 decode_putfh_maxsz + \
 345                                 decode_savefh_maxsz + \
 346                                 decode_putfh_maxsz + \
 347                                 decode_link_maxsz + \
 348                                 decode_getattr_maxsz + \
 349                                 decode_restorefh_maxsz + \
 350                                 decode_getattr_maxsz)
 351 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_symlink_maxsz + \
 354                                 encode_getattr_maxsz + \
 355                                 encode_getfh_maxsz)
 356 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 357                                 decode_putfh_maxsz + \
 358                                 decode_symlink_maxsz + \
 359                                 decode_getattr_maxsz + \
 360                                 decode_getfh_maxsz)
 361 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_savefh_maxsz + \
 364                                 encode_create_maxsz + \
 365                                 encode_getfh_maxsz + \
 366                                 encode_getattr_maxsz + \
 367                                 encode_restorefh_maxsz + \
 368                                 encode_getattr_maxsz)
 369 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 370                                 decode_putfh_maxsz + \
 371                                 decode_savefh_maxsz + \
 372                                 decode_create_maxsz + \
 373                                 decode_getfh_maxsz + \
 374                                 decode_getattr_maxsz + \
 375                                 decode_restorefh_maxsz + \
 376                                 decode_getattr_maxsz)
 377 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_getattr_maxsz)
 380 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_getattr_maxsz)
 383 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_getattr_maxsz)
 386 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 op_decode_hdr_maxsz + 12)
 389 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 390                                 encode_getattr_maxsz)
 391 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_delegreturn_maxsz + \
 396                                 encode_getattr_maxsz)
 397 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 398                                 decode_delegreturn_maxsz + \
 399                                 decode_getattr_maxsz)
 400 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 401                                 encode_putfh_maxsz + \
 402                                 encode_getattr_maxsz)
 403 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 404                                 decode_putfh_maxsz + \
 405                                 op_decode_hdr_maxsz + \
 406                                 nfs4_fattr_bitmap_maxsz + 1)
 407 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 408                                 encode_putfh_maxsz + \
 409                                 op_encode_hdr_maxsz + 4 + \
 410                                 nfs4_fattr_bitmap_maxsz + 1)
 411 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 412                                 decode_putfh_maxsz + \
 413                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 414 #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->nfs4_state, 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->nfs4_state, 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 + create->u.symlink->len);
 677                 WRITE32(create->u.symlink->len);
 678                 WRITEMEM(create->u.symlink->name, 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_getfh(struct xdr_stream *xdr)
 735 {
 736         uint32_t *p;
 737
 738         RESERVE_SPACE(4);
 739         WRITE32(OP_GETFH);
 740
 741         return 0;
 742 }
 743
 744 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 745 {
 746         uint32_t *p;
 747
 748         RESERVE_SPACE(8 + name->len);
 749         WRITE32(OP_LINK);
 750         WRITE32(name->len);
 751         WRITEMEM(name->name, name->len);
 752
 753         return 0;
 754 }
 755
 756 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 757 {
 758         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 759                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 760         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 761 }
 762
 763 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 764 {
 765         if (fl->fl_end == OFFSET_MAX)
 766                 return ~(uint64_t)0;
 767         return fl->fl_end - fl->fl_start + 1;
 768 }
 769
 770 /*
 771  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 772  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 773  */
 774 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 775 {
 776         uint32_t *p;
 777
 778         RESERVE_SPACE(32);
 779         WRITE32(OP_LOCK);
 780         WRITE32(nfs4_lock_type(args->fl, args->block));
 781         WRITE32(args->reclaim);
 782         WRITE64(args->fl->fl_start);
 783         WRITE64(nfs4_lock_length(args->fl));
 784         WRITE32(args->new_lock_owner);
 785         if (args->new_lock_owner){
 786                 RESERVE_SPACE(40);
 787                 WRITE32(args->open_seqid->sequence->counter);
 788                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
 789                 WRITE32(args->lock_seqid->sequence->counter);
 790                 WRITE64(args->lock_owner.clientid);
 791                 WRITE32(4);
 792                 WRITE32(args->lock_owner.id);
 793         }
 794         else {
 795                 RESERVE_SPACE(20);
 796                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
 797                 WRITE32(args->lock_seqid->sequence->counter);
 798         }
 799
 800         return 0;
 801 }
 802
 803 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 804 {
 805         uint32_t *p;
 806
 807         RESERVE_SPACE(40);
 808         WRITE32(OP_LOCKT);
 809         WRITE32(nfs4_lock_type(args->fl, 0));
 810         WRITE64(args->fl->fl_start);
 811         WRITE64(nfs4_lock_length(args->fl));
 812         WRITE64(args->lock_owner.clientid);
 813         WRITE32(4);
 814         WRITE32(args->lock_owner.id);
 815
 816         return 0;
 817 }
 818
 819 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 820 {
 821         uint32_t *p;
 822
 823         RESERVE_SPACE(44);
 824         WRITE32(OP_LOCKU);
 825         WRITE32(nfs4_lock_type(args->fl, 0));
 826         WRITE32(args->seqid->sequence->counter);
 827         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
 828         WRITE64(args->fl->fl_start);
 829         WRITE64(nfs4_lock_length(args->fl));
 830
 831         return 0;
 832 }
 833
 834 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 835 {
 836         int len = name->len;
 837         uint32_t *p;
 838
 839         RESERVE_SPACE(8 + len);
 840         WRITE32(OP_LOOKUP);
 841         WRITE32(len);
 842         WRITEMEM(name->name, len);
 843
 844         return 0;
 845 }
 846
 847 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 848 {
 849         uint32_t *p;
 850
 851         RESERVE_SPACE(8);
 852         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 853                 case FMODE_READ:
 854                         WRITE32(NFS4_SHARE_ACCESS_READ);
 855                         break;
 856                 case FMODE_WRITE:
 857                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 858                         break;
 859                 case FMODE_READ|FMODE_WRITE:
 860                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 861                         break;
 862                 default:
 863                         BUG();
 864         }
 865         WRITE32(0);             /* for linux, share_deny = 0 always */
 866 }
 867
 868 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 869 {
 870         uint32_t *p;
 871  /*
 872  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 873  * owner 4 = 32
 874  */
 875         RESERVE_SPACE(8);
 876         WRITE32(OP_OPEN);
 877         WRITE32(arg->seqid->sequence->counter);
 878         encode_share_access(xdr, arg->open_flags);
 879         RESERVE_SPACE(16);
 880         WRITE64(arg->clientid);
 881         WRITE32(4);
 882         WRITE32(arg->id);
 883 }
 884
 885 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 886 {
 887         uint32_t *p;
 888
 889         RESERVE_SPACE(4);
 890         switch(arg->open_flags & O_EXCL) {
 891                 case 0:
 892                         WRITE32(NFS4_CREATE_UNCHECKED);
 893                         encode_attrs(xdr, arg->u.attrs, arg->server);
 894                         break;
 895                 default:
 896                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 897                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 898         }
 899 }
 900
 901 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 902 {
 903         uint32_t *p;
 904
 905         RESERVE_SPACE(4);
 906         switch (arg->open_flags & O_CREAT) {
 907                 case 0:
 908                         WRITE32(NFS4_OPEN_NOCREATE);
 909                         break;
 910                 default:
 911                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 912                         WRITE32(NFS4_OPEN_CREATE);
 913                         encode_createmode(xdr, arg);
 914         }
 915 }
 916
 917 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 918 {
 919         uint32_t *p;
 920
 921         RESERVE_SPACE(4);
 922         switch (delegation_type) {
 923                 case 0:
 924                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 925                         break;
 926                 case FMODE_READ:
 927                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 928                         break;
 929                 case FMODE_WRITE|FMODE_READ:
 930                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 931                         break;
 932                 default:
 933                         BUG();
 934         }
 935 }
 936
 937 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 938 {
 939         uint32_t *p;
 940
 941         RESERVE_SPACE(4);
 942         WRITE32(NFS4_OPEN_CLAIM_NULL);
 943         encode_string(xdr, name->len, name->name);
 944 }
 945
 946 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 947 {
 948         uint32_t *p;
 949
 950         RESERVE_SPACE(4);
 951         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 952         encode_delegation_type(xdr, type);
 953 }
 954
 955 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 956 {
 957         uint32_t *p;
 958
 959         RESERVE_SPACE(4+sizeof(stateid->data));
 960         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 961         WRITEMEM(stateid->data, sizeof(stateid->data));
 962         encode_string(xdr, name->len, name->name);
 963 }
 964
 965 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 966 {
 967         encode_openhdr(xdr, arg);
 968         encode_opentype(xdr, arg);
 969         switch (arg->claim) {
 970                 case NFS4_OPEN_CLAIM_NULL:
 971                         encode_claim_null(xdr, arg->name);
 972                         break;
 973                 case NFS4_OPEN_CLAIM_PREVIOUS:
 974                         encode_claim_previous(xdr, arg->u.delegation_type);
 975                         break;
 976                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 977                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 978                         break;
 979                 default:
 980                         BUG();
 981         }
 982         return 0;
 983 }
 984
 985 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 986 {
 987         uint32_t *p;
 988
 989         RESERVE_SPACE(8+sizeof(arg->stateid->data));
 990         WRITE32(OP_OPEN_CONFIRM);
 991         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 992         WRITE32(arg->seqid->sequence->counter);
 993
 994         return 0;
 995 }
 996
 997 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 998 {
 999         uint32_t *p;
1000
1001         RESERVE_SPACE(8+sizeof(arg->stateid->data));
1002         WRITE32(OP_OPEN_DOWNGRADE);
1003         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
1004         WRITE32(arg->seqid->sequence->counter);
1005         encode_share_access(xdr, arg->open_flags);
1006         return 0;
1007 }
1008
1009 static int
1010 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1011 {
1012         int len = fh->size;
1013         uint32_t *p;
1014
1015         RESERVE_SPACE(8 + len);
1016         WRITE32(OP_PUTFH);
1017         WRITE32(len);
1018         WRITEMEM(fh->data, len);
1019
1020         return 0;
1021 }
1022
1023 static int encode_putrootfh(struct xdr_stream *xdr)
1024 {
1025         uint32_t *p;
1026
1027         RESERVE_SPACE(4);
1028         WRITE32(OP_PUTROOTFH);
1029
1030         return 0;
1031 }
1032
1033 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1034 {
1035         nfs4_stateid stateid;
1036         uint32_t *p;
1037
1038         RESERVE_SPACE(16);
1039         if (ctx->state != NULL) {
1040                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1041                 WRITEMEM(stateid.data, sizeof(stateid.data));
1042         } else
1043                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1044 }
1045
1046 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1047 {
1048         uint32_t *p;
1049
1050         RESERVE_SPACE(4);
1051         WRITE32(OP_READ);
1052
1053         encode_stateid(xdr, args->context);
1054
1055         RESERVE_SPACE(12);
1056         WRITE64(args->offset);
1057         WRITE32(args->count);
1058
1059         return 0;
1060 }
1061
1062 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1063 {
1064         struct rpc_auth *auth = req->rq_task->tk_auth;
1065         uint32_t attrs[2] = {
1066                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1067                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1068         };
1069         int replen;
1070         uint32_t *p;
1071
1072         RESERVE_SPACE(32+sizeof(nfs4_verifier));
1073         WRITE32(OP_READDIR);
1074         WRITE64(readdir->cookie);
1075         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
1076         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1077         WRITE32(readdir->count);
1078         WRITE32(2);
1079         /* Switch to mounted_on_fileid if the server supports it */
1080         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1081                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1082         else
1083                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1084         WRITE32(attrs[0] & readdir->bitmask[0]);
1085         WRITE32(attrs[1] & readdir->bitmask[1]);
1086         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1087                         __FUNCTION__,
1088                         (unsigned long long)readdir->cookie,
1089                         ((u32 *)readdir->verifier.data)[0],
1090                         ((u32 *)readdir->verifier.data)[1],
1091                         attrs[0] & readdir->bitmask[0],
1092                         attrs[1] & readdir->bitmask[1]);
1093
1094         /* set up reply kvec
1095          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1096          *      + OP_READDIR + status + verifer(2)  = 9
1097          */
1098         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1099         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1100                          readdir->pgbase, readdir->count);
1101         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1102                         __FUNCTION__, replen, readdir->pages,
1103                         readdir->pgbase, readdir->count);
1104
1105         return 0;
1106 }
1107
1108 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1109 {
1110         struct rpc_auth *auth = req->rq_task->tk_auth;
1111         unsigned int replen;
1112         uint32_t *p;
1113
1114         RESERVE_SPACE(4);
1115         WRITE32(OP_READLINK);
1116
1117         /* set up reply kvec
1118          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1119          *      + OP_READLINK + status + string length = 8
1120          */
1121         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1122         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1123                         readlink->pgbase, readlink->pglen);
1124
1125         return 0;
1126 }
1127
1128 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1129 {
1130         uint32_t *p;
1131
1132         RESERVE_SPACE(8 + name->len);
1133         WRITE32(OP_REMOVE);
1134         WRITE32(name->len);
1135         WRITEMEM(name->name, name->len);
1136
1137         return 0;
1138 }
1139
1140 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1141 {
1142         uint32_t *p;
1143
1144         RESERVE_SPACE(8 + oldname->len);
1145         WRITE32(OP_RENAME);
1146         WRITE32(oldname->len);
1147         WRITEMEM(oldname->name, oldname->len);
1148
1149         RESERVE_SPACE(4 + newname->len);
1150         WRITE32(newname->len);
1151         WRITEMEM(newname->name, newname->len);
1152
1153         return 0;
1154 }
1155
1156 static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
1157 {
1158         uint32_t *p;
1159
1160         RESERVE_SPACE(12);
1161         WRITE32(OP_RENEW);
1162         WRITE64(client_stateid->cl_clientid);
1163
1164         return 0;
1165 }
1166
1167 static int
1168 encode_restorefh(struct xdr_stream *xdr)
1169 {
1170         uint32_t *p;
1171
1172         RESERVE_SPACE(4);
1173         WRITE32(OP_RESTOREFH);
1174
1175         return 0;
1176 }
1177
1178 static int
1179 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1180 {
1181         uint32_t *p;
1182
1183         RESERVE_SPACE(4+sizeof(zero_stateid.data));
1184         WRITE32(OP_SETATTR);
1185         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
1186         RESERVE_SPACE(2*4);
1187         WRITE32(1);
1188         WRITE32(FATTR4_WORD0_ACL);
1189         if (arg->acl_len % 4)
1190                 return -EINVAL;
1191         RESERVE_SPACE(4);
1192         WRITE32(arg->acl_len);
1193         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1194         return 0;
1195 }
1196
1197 static int
1198 encode_savefh(struct xdr_stream *xdr)
1199 {
1200         uint32_t *p;
1201
1202         RESERVE_SPACE(4);
1203         WRITE32(OP_SAVEFH);
1204
1205         return 0;
1206 }
1207
1208 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1209 {
1210         int status;
1211         uint32_t *p;
1212
1213         RESERVE_SPACE(4+sizeof(arg->stateid.data));
1214         WRITE32(OP_SETATTR);
1215         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
1216
1217         if ((status = encode_attrs(xdr, arg->iap, server)))
1218                 return status;
1219
1220         return 0;
1221 }
1222
1223 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1224 {
1225         uint32_t *p;
1226
1227         RESERVE_SPACE(4 + sizeof(setclientid->sc_verifier->data));
1228         WRITE32(OP_SETCLIENTID);
1229         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
1230
1231         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1232         RESERVE_SPACE(4);
1233         WRITE32(setclientid->sc_prog);
1234         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1235         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1236         RESERVE_SPACE(4);
1237         WRITE32(setclientid->sc_cb_ident);
1238
1239         return 0;
1240 }
1241
1242 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
1243 {
1244         uint32_t *p;
1245
1246         RESERVE_SPACE(12 + sizeof(client_state->cl_confirm.data));
1247         WRITE32(OP_SETCLIENTID_CONFIRM);
1248         WRITE64(client_state->cl_clientid);
1249         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
1250
1251         return 0;
1252 }
1253
1254 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1255 {
1256         uint32_t *p;
1257
1258         RESERVE_SPACE(4);
1259         WRITE32(OP_WRITE);
1260
1261         encode_stateid(xdr, args->context);
1262
1263         RESERVE_SPACE(16);
1264         WRITE64(args->offset);
1265         WRITE32(args->stable);
1266         WRITE32(args->count);
1267
1268         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1269
1270         return 0;
1271 }
1272
1273 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1274 {
1275         uint32_t *p;
1276
1277         RESERVE_SPACE(20);
1278
1279         WRITE32(OP_DELEGRETURN);
1280         WRITEMEM(stateid->data, sizeof(stateid->data));
1281         return 0;
1282
1283 }
1284 /*
1285  * END OF "GENERIC" ENCODE ROUTINES.
1286  */
1287
1288 /*
1289  * Encode an ACCESS request
1290  */
1291 static int nfs4_xdr_enc_access(struct rpc_rqst *req, uint32_t *p, const struct nfs4_accessargs *args)
1292 {
1293         struct xdr_stream xdr;
1294         struct compound_hdr hdr = {
1295                 .nops = 2,
1296         };
1297         int status;
1298
1299         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1300         encode_compound_hdr(&xdr, &hdr);
1301         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1302                 status = encode_access(&xdr, args->access);
1303         return status;
1304 }
1305
1306 /*
1307  * Encode LOOKUP request
1308  */
1309 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_arg *args)
1310 {
1311         struct xdr_stream xdr;
1312         struct compound_hdr hdr = {
1313                 .nops = 4,
1314         };
1315         int status;
1316
1317         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1318         encode_compound_hdr(&xdr, &hdr);
1319         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1320                 goto out;
1321         if ((status = encode_lookup(&xdr, args->name)) != 0)
1322                 goto out;
1323         if ((status = encode_getfh(&xdr)) != 0)
1324                 goto out;
1325         status = encode_getfattr(&xdr, args->bitmask);
1326 out:
1327         return status;
1328 }
1329
1330 /*
1331  * Encode LOOKUP_ROOT request
1332  */
1333 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, uint32_t *p, const struct nfs4_lookup_root_arg *args)
1334 {
1335         struct xdr_stream xdr;
1336         struct compound_hdr hdr = {
1337                 .nops = 3,
1338         };
1339         int status;
1340
1341         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1342         encode_compound_hdr(&xdr, &hdr);
1343         if ((status = encode_putrootfh(&xdr)) != 0)
1344                 goto out;
1345         if ((status = encode_getfh(&xdr)) == 0)
1346                 status = encode_getfattr(&xdr, args->bitmask);
1347 out:
1348         return status;
1349 }
1350
1351 /*
1352  * Encode REMOVE request
1353  */
1354 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct nfs4_remove_arg *args)
1355 {
1356         struct xdr_stream xdr;
1357         struct compound_hdr hdr = {
1358                 .nops = 3,
1359         };
1360         int status;
1361
1362         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1363         encode_compound_hdr(&xdr, &hdr);
1364         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1365                 goto out;
1366         if ((status = encode_remove(&xdr, args->name)) != 0)
1367                 goto out;
1368         status = encode_getfattr(&xdr, args->bitmask);
1369 out:
1370         return status;
1371 }
1372
1373 /*
1374  * Encode RENAME request
1375  */
1376 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct nfs4_rename_arg *args)
1377 {
1378         struct xdr_stream xdr;
1379         struct compound_hdr hdr = {
1380                 .nops = 7,
1381         };
1382         int status;
1383
1384         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1385         encode_compound_hdr(&xdr, &hdr);
1386         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1387                 goto out;
1388         if ((status = encode_savefh(&xdr)) != 0)
1389                 goto out;
1390         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1391                 goto out;
1392         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1393                 goto out;
1394         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1395                 goto out;
1396         if ((status = encode_restorefh(&xdr)) != 0)
1397                 goto out;
1398         status = encode_getfattr(&xdr, args->bitmask);
1399 out:
1400         return status;
1401 }
1402
1403 /*
1404  * Encode LINK request
1405  */
1406 static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs4_link_arg *args)
1407 {
1408         struct xdr_stream xdr;
1409         struct compound_hdr hdr = {
1410                 .nops = 7,
1411         };
1412         int status;
1413
1414         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1415         encode_compound_hdr(&xdr, &hdr);
1416         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1417                 goto out;
1418         if ((status = encode_savefh(&xdr)) != 0)
1419                 goto out;
1420         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1421                 goto out;
1422         if ((status = encode_link(&xdr, args->name)) != 0)
1423                 goto out;
1424         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1425                 goto out;
1426         if ((status = encode_restorefh(&xdr)) != 0)
1427                 goto out;
1428         status = encode_getfattr(&xdr, args->bitmask);
1429 out:
1430         return status;
1431 }
1432
1433 /*
1434  * Encode CREATE request
1435  */
1436 static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1437 {
1438         struct xdr_stream xdr;
1439         struct compound_hdr hdr = {
1440                 .nops = 7,
1441         };
1442         int status;
1443
1444         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1445         encode_compound_hdr(&xdr, &hdr);
1446         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1447                 goto out;
1448         if ((status = encode_savefh(&xdr)) != 0)
1449                 goto out;
1450         if ((status = encode_create(&xdr, args)) != 0)
1451                 goto out;
1452         if ((status = encode_getfh(&xdr)) != 0)
1453                 goto out;
1454         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1455                 goto out;
1456         if ((status = encode_restorefh(&xdr)) != 0)
1457                 goto out;
1458         status = encode_getfattr(&xdr, args->bitmask);
1459 out:
1460         return status;
1461 }
1462
1463 /*
1464  * Encode SYMLINK request
1465  */
1466 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_create_arg *args)
1467 {
1468         return nfs4_xdr_enc_create(req, p, args);
1469 }
1470
1471 /*
1472  * Encode GETATTR request
1473  */
1474 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, uint32_t *p, const struct nfs4_getattr_arg *args)
1475 {
1476         struct xdr_stream xdr;
1477         struct compound_hdr hdr = {
1478                 .nops = 2,
1479         };
1480         int status;
1481
1482         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1483         encode_compound_hdr(&xdr, &hdr);
1484         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1485                 status = encode_getfattr(&xdr, args->bitmask);
1486         return status;
1487 }
1488
1489 /*
1490  * Encode a CLOSE request
1491  */
1492 static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1493 {
1494         struct xdr_stream xdr;
1495         struct compound_hdr hdr = {
1496                 .nops   = 3,
1497         };
1498         int status;
1499
1500         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1501         encode_compound_hdr(&xdr, &hdr);
1502         status = encode_putfh(&xdr, args->fh);
1503         if(status)
1504                 goto out;
1505         status = encode_close(&xdr, args);
1506         if (status != 0)
1507                 goto out;
1508         status = encode_getfattr(&xdr, args->bitmask);
1509 out:
1510         return status;
1511 }
1512
1513 /*
1514  * Encode an OPEN request
1515  */
1516 static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1517 {
1518         struct xdr_stream xdr;
1519         struct compound_hdr hdr = {
1520                 .nops = 7,
1521         };
1522         int status;
1523
1524         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1525         encode_compound_hdr(&xdr, &hdr);
1526         status = encode_putfh(&xdr, args->fh);
1527         if (status)
1528                 goto out;
1529         status = encode_savefh(&xdr);
1530         if (status)
1531                 goto out;
1532         status = encode_open(&xdr, args);
1533         if (status)
1534                 goto out;
1535         status = encode_getfh(&xdr);
1536         if (status)
1537                 goto out;
1538         status = encode_getfattr(&xdr, args->bitmask);
1539         if (status)
1540                 goto out;
1541         status = encode_restorefh(&xdr);
1542         if (status)
1543                 goto out;
1544         status = encode_getfattr(&xdr, args->bitmask);
1545 out:
1546         return status;
1547 }
1548
1549 /*
1550  * Encode an OPEN_CONFIRM request
1551  */
1552 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_open_confirmargs *args)
1553 {
1554         struct xdr_stream xdr;
1555         struct compound_hdr hdr = {
1556                 .nops   = 2,
1557         };
1558         int status;
1559
1560         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1561         encode_compound_hdr(&xdr, &hdr);
1562         status = encode_putfh(&xdr, args->fh);
1563         if(status)
1564                 goto out;
1565         status = encode_open_confirm(&xdr, args);
1566 out:
1567         return status;
1568 }
1569
1570 /*
1571  * Encode an OPEN request with no attributes.
1572  */
1573 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nfs_openargs *args)
1574 {
1575         struct xdr_stream xdr;
1576         struct compound_hdr hdr = {
1577                 .nops   = 3,
1578         };
1579         int status;
1580
1581         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1582         encode_compound_hdr(&xdr, &hdr);
1583         status = encode_putfh(&xdr, args->fh);
1584         if (status)
1585                 goto out;
1586         status = encode_open(&xdr, args);
1587         if (status)
1588                 goto out;
1589         status = encode_getfattr(&xdr, args->bitmask);
1590 out:
1591         return status;
1592 }
1593
1594 /*
1595  * Encode an OPEN_DOWNGRADE request
1596  */
1597 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct nfs_closeargs *args)
1598 {
1599         struct xdr_stream xdr;
1600         struct compound_hdr hdr = {
1601                 .nops   = 3,
1602         };
1603         int status;
1604
1605         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1606         encode_compound_hdr(&xdr, &hdr);
1607         status = encode_putfh(&xdr, args->fh);
1608         if (status)
1609                 goto out;
1610         status = encode_open_downgrade(&xdr, args);
1611         if (status != 0)
1612                 goto out;
1613         status = encode_getfattr(&xdr, args->bitmask);
1614 out:
1615         return status;
1616 }
1617
1618 /*
1619  * Encode a LOCK request
1620  */
1621 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_lock_args *args)
1622 {
1623         struct xdr_stream xdr;
1624         struct compound_hdr hdr = {
1625                 .nops   = 2,
1626         };
1627         int status;
1628
1629         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1630         encode_compound_hdr(&xdr, &hdr);
1631         status = encode_putfh(&xdr, args->fh);
1632         if(status)
1633                 goto out;
1634         status = encode_lock(&xdr, args);
1635 out:
1636         return status;
1637 }
1638
1639 /*
1640  * Encode a LOCKT request
1641  */
1642 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, uint32_t *p, struct nfs_lockt_args *args)
1643 {
1644         struct xdr_stream xdr;
1645         struct compound_hdr hdr = {
1646                 .nops   = 2,
1647         };
1648         int status;
1649
1650         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1651         encode_compound_hdr(&xdr, &hdr);
1652         status = encode_putfh(&xdr, args->fh);
1653         if(status)
1654                 goto out;
1655         status = encode_lockt(&xdr, args);
1656 out:
1657         return status;
1658 }
1659
1660 /*
1661  * Encode a LOCKU request
1662  */
1663 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, uint32_t *p, struct nfs_locku_args *args)
1664 {
1665         struct xdr_stream xdr;
1666         struct compound_hdr hdr = {
1667                 .nops   = 2,
1668         };
1669         int status;
1670
1671         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1672         encode_compound_hdr(&xdr, &hdr);
1673         status = encode_putfh(&xdr, args->fh);
1674         if(status)
1675                 goto out;
1676         status = encode_locku(&xdr, args);
1677 out:
1678         return status;
1679 }
1680
1681 /*
1682  * Encode a READLINK request
1683  */
1684 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readlink *args)
1685 {
1686         struct xdr_stream xdr;
1687         struct compound_hdr hdr = {
1688                 .nops = 2,
1689         };
1690         int status;
1691
1692         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1693         encode_compound_hdr(&xdr, &hdr);
1694         status = encode_putfh(&xdr, args->fh);
1695         if(status)
1696                 goto out;
1697         status = encode_readlink(&xdr, args, req);
1698 out:
1699         return status;
1700 }
1701
1702 /*
1703  * Encode a READDIR request
1704  */
1705 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, uint32_t *p, const struct nfs4_readdir_arg *args)
1706 {
1707         struct xdr_stream xdr;
1708         struct compound_hdr hdr = {
1709                 .nops = 2,
1710         };
1711         int status;
1712
1713         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1714         encode_compound_hdr(&xdr, &hdr);
1715         status = encode_putfh(&xdr, args->fh);
1716         if(status)
1717                 goto out;
1718         status = encode_readdir(&xdr, args, req);
1719 out:
1720         return status;
1721 }
1722
1723 /*
1724  * Encode a READ request
1725  */
1726 static int nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
1727 {
1728         struct rpc_auth *auth = req->rq_task->tk_auth;
1729         struct xdr_stream xdr;
1730         struct compound_hdr hdr = {
1731                 .nops = 2,
1732         };
1733         int replen, status;
1734
1735         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1736         encode_compound_hdr(&xdr, &hdr);
1737         status = encode_putfh(&xdr, args->fh);
1738         if (status)
1739                 goto out;
1740         status = encode_read(&xdr, args);
1741         if (status)
1742                 goto out;
1743
1744         /* set up reply kvec
1745          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1746          *       + OP_READ + status + eof + datalen = 9
1747          */
1748         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1749         xdr_inline_pages(&req->rq_rcv_buf, replen,
1750                          args->pages, args->pgbase, args->count);
1751 out:
1752         return status;
1753 }
1754
1755 /*
1756  * Encode an SETATTR request
1757  */
1758 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, uint32_t *p, struct nfs_setattrargs *args)
1759
1760 {
1761         struct xdr_stream xdr;
1762         struct compound_hdr hdr = {
1763                 .nops   = 3,
1764         };
1765         int status;
1766
1767         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1768         encode_compound_hdr(&xdr, &hdr);
1769         status = encode_putfh(&xdr, args->fh);
1770         if(status)
1771                 goto out;
1772         status = encode_setattr(&xdr, args, args->server);
1773         if(status)
1774                 goto out;
1775         status = encode_getfattr(&xdr, args->bitmask);
1776 out:
1777         return status;
1778 }
1779
1780 /*
1781  * Encode a GETACL request
1782  */
1783 static int
1784 nfs4_xdr_enc_getacl(struct rpc_rqst *req, uint32_t *p,
1785                 struct nfs_getaclargs *args)
1786 {
1787         struct xdr_stream xdr;
1788         struct rpc_auth *auth = req->rq_task->tk_auth;
1789         struct compound_hdr hdr = {
1790                 .nops   = 2,
1791         };
1792         int replen, status;
1793
1794         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1795         encode_compound_hdr(&xdr, &hdr);
1796         status = encode_putfh(&xdr, args->fh);
1797         if (status)
1798                 goto out;
1799         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1800         /* set up reply buffer: */
1801         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1802         xdr_inline_pages(&req->rq_rcv_buf, replen,
1803                 args->acl_pages, args->acl_pgbase, args->acl_len);
1804 out:
1805         return status;
1806 }
1807
1808 /*
1809  * Encode a WRITE request
1810  */
1811 static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1812 {
1813         struct xdr_stream xdr;
1814         struct compound_hdr hdr = {
1815                 .nops = 3,
1816         };
1817         int status;
1818
1819         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1820         encode_compound_hdr(&xdr, &hdr);
1821         status = encode_putfh(&xdr, args->fh);
1822         if (status)
1823                 goto out;
1824         status = encode_write(&xdr, args);
1825         if (status)
1826                 goto out;
1827         status = encode_getfattr(&xdr, args->bitmask);
1828 out:
1829         return status;
1830 }
1831
1832 /*
1833  *  a COMMIT request
1834  */
1835 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args)
1836 {
1837         struct xdr_stream xdr;
1838         struct compound_hdr hdr = {
1839                 .nops = 3,
1840         };
1841         int status;
1842
1843         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844         encode_compound_hdr(&xdr, &hdr);
1845         status = encode_putfh(&xdr, args->fh);
1846         if (status)
1847                 goto out;
1848         status = encode_commit(&xdr, args);
1849         if (status)
1850                 goto out;
1851         status = encode_getfattr(&xdr, args->bitmask);
1852 out:
1853         return status;
1854 }
1855
1856 /*
1857  * FSINFO request
1858  */
1859 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs4_fsinfo_arg *args)
1860 {
1861         struct xdr_stream xdr;
1862         struct compound_hdr hdr = {
1863                 .nops   = 2,
1864         };
1865         int status;
1866
1867         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1868         encode_compound_hdr(&xdr, &hdr);
1869         status = encode_putfh(&xdr, args->fh);
1870         if (!status)
1871                 status = encode_fsinfo(&xdr, args->bitmask);
1872         return status;
1873 }
1874
1875 /*
1876  * a PATHCONF request
1877  */
1878 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, uint32_t *p, const struct nfs4_pathconf_arg *args)
1879 {
1880         struct xdr_stream xdr;
1881         struct compound_hdr hdr = {
1882                 .nops = 2,
1883         };
1884         int status;
1885
1886         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1887         encode_compound_hdr(&xdr, &hdr);
1888         status = encode_putfh(&xdr, args->fh);
1889         if (!status)
1890                 status = encode_getattr_one(&xdr,
1891                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1892         return status;
1893 }
1894
1895 /*
1896  * a STATFS request
1897  */
1898 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, uint32_t *p, const struct nfs4_statfs_arg *args)
1899 {
1900         struct xdr_stream xdr;
1901         struct compound_hdr hdr = {
1902                 .nops = 2,
1903         };
1904         int status;
1905
1906         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1907         encode_compound_hdr(&xdr, &hdr);
1908         status = encode_putfh(&xdr, args->fh);
1909         if (status == 0)
1910                 status = encode_getattr_two(&xdr,
1911                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1912                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1913         return status;
1914 }
1915
1916 /*
1917  * GETATTR_BITMAP request
1918  */
1919 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, uint32_t *p, const struct nfs_fh *fhandle)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .nops = 2,
1924         };
1925         int status;
1926
1927         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1928         encode_compound_hdr(&xdr, &hdr);
1929         status = encode_putfh(&xdr, fhandle);
1930         if (status == 0)
1931                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1932                                 FATTR4_WORD0_LINK_SUPPORT|
1933                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1934                                 FATTR4_WORD0_ACLSUPPORT);
1935         return status;
1936 }
1937
1938 /*
1939  * a RENEW request
1940  */
1941 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1942 {
1943         struct xdr_stream xdr;
1944         struct compound_hdr hdr = {
1945                 .nops   = 1,
1946         };
1947
1948         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949         encode_compound_hdr(&xdr, &hdr);
1950         return encode_renew(&xdr, clp);
1951 }
1952
1953 /*
1954  * a SETCLIENTID request
1955  */
1956 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, uint32_t *p, struct nfs4_setclientid *sc)
1957 {
1958         struct xdr_stream xdr;
1959         struct compound_hdr hdr = {
1960                 .nops   = 1,
1961         };
1962
1963         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964         encode_compound_hdr(&xdr, &hdr);
1965         return encode_setclientid(&xdr, sc);
1966 }
1967
1968 /*
1969  * a SETCLIENTID_CONFIRM request
1970  */
1971 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
1972 {
1973         struct xdr_stream xdr;
1974         struct compound_hdr hdr = {
1975                 .nops   = 3,
1976         };
1977         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1978         int status;
1979
1980         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1981         encode_compound_hdr(&xdr, &hdr);
1982         status = encode_setclientid_confirm(&xdr, clp);
1983         if (!status)
1984                 status = encode_putrootfh(&xdr);
1985         if (!status)
1986                 status = encode_fsinfo(&xdr, lease_bitmap);
1987         return status;
1988 }
1989
1990 /*
1991  * DELEGRETURN request
1992  */
1993 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const struct nfs4_delegreturnargs *args)
1994 {
1995         struct xdr_stream xdr;
1996         struct compound_hdr hdr = {
1997                 .nops = 3,
1998         };
1999         int status;
2000
2001         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2002         encode_compound_hdr(&xdr, &hdr);
2003         status = encode_putfh(&xdr, args->fhandle);
2004         if (status != 0)
2005                 goto out;
2006         status = encode_delegreturn(&xdr, args->stateid);
2007         if (status != 0)
2008                 goto out;
2009         status = encode_getfattr(&xdr, args->bitmask);
2010 out:
2011         return status;
2012 }
2013
2014 /*
2015  * Encode FS_LOCATIONS request
2016  */
2017 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs_locations_arg *args)
2018 {
2019         struct xdr_stream xdr;
2020         struct compound_hdr hdr = {
2021                 .nops = 3,
2022         };
2023         struct rpc_auth *auth = req->rq_task->tk_auth;
2024         int replen;
2025         int status;
2026
2027         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2028         encode_compound_hdr(&xdr, &hdr);
2029         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2030                 goto out;
2031         if ((status = encode_lookup(&xdr, args->name)) != 0)
2032                 goto out;
2033         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
2034                 goto out;
2035         /* set up reply
2036          *   toplevel_status + taglen + rescount + OP_PUTFH + status
2037          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2038          */
2039         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2040         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2041                         0, PAGE_SIZE);
2042 out:
2043         return status;
2044 }
2045
2046 /*
2047  * START OF "GENERIC" DECODE ROUTINES.
2048  *   These may look a little ugly since they are imported from a "generic"
2049  * set of XDR encode/decode routines which are intended to be shared by
2050  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2051  *
2052  * If the pain of reading these is too great, it should be a straightforward
2053  * task to translate them into Linux-specific versions which are more
2054  * consistent with the style used in NFSv2/v3...
2055  */
2056 #define READ32(x)         (x) = ntohl(*p++)
2057 #define READ64(x)         do {                  \
2058         (x) = (u64)ntohl(*p++) << 32;           \
2059         (x) |= ntohl(*p++);                     \
2060 } while (0)
2061 #define READTIME(x)       do {                  \
2062         p++;                                    \
2063         (x.tv_sec) = ntohl(*p++);               \
2064         (x.tv_nsec) = ntohl(*p++);              \
2065 } while (0)
2066 #define COPYMEM(x,nbytes) do {                  \
2067         memcpy((x), p, nbytes);                 \
2068         p += XDR_QUADLEN(nbytes);               \
2069 } while (0)
2070
2071 #define READ_BUF(nbytes)  do { \
2072         p = xdr_inline_decode(xdr, nbytes); \
2073         if (!p) { \
2074                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2075                                 __FUNCTION__, __LINE__); \
2076                 return -EIO; \
2077         } \
2078 } while (0)
2079
2080 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2081 {
2082         uint32_t *p;
2083
2084         READ_BUF(4);
2085         READ32(*len);
2086         READ_BUF(*len);
2087         *string = (char *)p;
2088         return 0;
2089 }
2090
2091 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2092 {
2093         uint32_t *p;
2094
2095         READ_BUF(8);
2096         READ32(hdr->status);
2097         READ32(hdr->taglen);
2098
2099         READ_BUF(hdr->taglen + 4);
2100         hdr->tag = (char *)p;
2101         p += XDR_QUADLEN(hdr->taglen);
2102         READ32(hdr->nops);
2103         return 0;
2104 }
2105
2106 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2107 {
2108         uint32_t *p;
2109         uint32_t opnum;
2110         int32_t nfserr;
2111
2112         READ_BUF(8);
2113         READ32(opnum);
2114         if (opnum != expected) {
2115                 printk(KERN_NOTICE
2116                                 "nfs4_decode_op_hdr: Server returned operation"
2117                                 " %d but we issued a request for %d\n",
2118                                 opnum, expected);
2119                 return -EIO;
2120         }
2121         READ32(nfserr);
2122         if (nfserr != NFS_OK)
2123                 return -nfs_stat_to_errno(nfserr);
2124         return 0;
2125 }
2126
2127 /* Dummy routine */
2128 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
2129 {
2130         uint32_t *p;
2131         unsigned int strlen;
2132         char *str;
2133
2134         READ_BUF(12);
2135         return decode_opaque_inline(xdr, &strlen, &str);
2136 }
2137
2138 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2139 {
2140         uint32_t bmlen, *p;
2141
2142         READ_BUF(4);
2143         READ32(bmlen);
2144
2145         bitmap[0] = bitmap[1] = 0;
2146         READ_BUF((bmlen << 2));
2147         if (bmlen > 0) {
2148                 READ32(bitmap[0]);
2149                 if (bmlen > 1)
2150                         READ32(bitmap[1]);
2151         }
2152         return 0;
2153 }
2154
2155 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, uint32_t **savep)
2156 {
2157         uint32_t *p;
2158
2159         READ_BUF(4);
2160         READ32(*attrlen);
2161         *savep = xdr->p;
2162         return 0;
2163 }
2164
2165 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2166 {
2167         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2168                 decode_attr_bitmap(xdr, bitmask);
2169                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2170         } else
2171                 bitmask[0] = bitmask[1] = 0;
2172         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2173         return 0;
2174 }
2175
2176 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2177 {
2178         uint32_t *p;
2179
2180         *type = 0;
2181         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2182                 return -EIO;
2183         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2184                 READ_BUF(4);
2185                 READ32(*type);
2186                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2187                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2188                         return -EIO;
2189                 }
2190                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2191         }
2192         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2193         return 0;
2194 }
2195
2196 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2197 {
2198         uint32_t *p;
2199
2200         *change = 0;
2201         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2202                 return -EIO;
2203         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2204                 READ_BUF(8);
2205                 READ64(*change);
2206                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2207         }
2208         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2209                         (unsigned long long)*change);
2210         return 0;
2211 }
2212
2213 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2214 {
2215         uint32_t *p;
2216
2217         *size = 0;
2218         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2219                 return -EIO;
2220         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2221                 READ_BUF(8);
2222                 READ64(*size);
2223                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2224         }
2225         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2226         return 0;
2227 }
2228
2229 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2230 {
2231         uint32_t *p;
2232
2233         *res = 0;
2234         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2235                 return -EIO;
2236         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2237                 READ_BUF(4);
2238                 READ32(*res);
2239                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2240         }
2241         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2242         return 0;
2243 }
2244
2245 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2246 {
2247         uint32_t *p;
2248
2249         *res = 0;
2250         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2251                 return -EIO;
2252         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2253                 READ_BUF(4);
2254                 READ32(*res);
2255                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2256         }
2257         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2258         return 0;
2259 }
2260
2261 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2262 {
2263         uint32_t *p;
2264
2265         fsid->major = 0;
2266         fsid->minor = 0;
2267         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2268                 return -EIO;
2269         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2270                 READ_BUF(16);
2271                 READ64(fsid->major);
2272                 READ64(fsid->minor);
2273                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2274         }
2275         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2276                         (unsigned long long)fsid->major,
2277                         (unsigned long long)fsid->minor);
2278         return 0;
2279 }
2280
2281 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2282 {
2283         uint32_t *p;
2284
2285         *res = 60;
2286         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2287                 return -EIO;
2288         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2289                 READ_BUF(4);
2290                 READ32(*res);
2291                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2292         }
2293         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2294         return 0;
2295 }
2296
2297 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2298 {
2299         uint32_t *p;
2300
2301         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2302         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2303                 return -EIO;
2304         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2305                 READ_BUF(4);
2306                 READ32(*res);
2307                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2308         }
2309         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2310         return 0;
2311 }
2312
2313 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2314 {
2315         uint32_t *p;
2316
2317         *fileid = 0;
2318         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2319                 return -EIO;
2320         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2321                 READ_BUF(8);
2322                 READ64(*fileid);
2323                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2324         }
2325         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2326         return 0;
2327 }
2328
2329 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2330 {
2331         uint32_t *p;
2332         int status = 0;
2333
2334         *res = 0;
2335         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2336                 return -EIO;
2337         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2338                 READ_BUF(8);
2339                 READ64(*res);
2340                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2341         }
2342         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2343         return status;
2344 }
2345
2346 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2347 {
2348         uint32_t *p;
2349         int status = 0;
2350
2351         *res = 0;
2352         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2353                 return -EIO;
2354         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2355                 READ_BUF(8);
2356                 READ64(*res);
2357                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2358         }
2359         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2360         return status;
2361 }
2362
2363 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2364 {
2365         uint32_t *p;
2366         int status = 0;
2367
2368         *res = 0;
2369         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2370                 return -EIO;
2371         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2372                 READ_BUF(8);
2373                 READ64(*res);
2374                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2375         }
2376         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2377         return status;
2378 }
2379
2380 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fs_locations *res)
2381 {
2382         int n;
2383         uint32_t *p;
2384         int status = -EIO;
2385
2386         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2387                 goto out;
2388         status = 0;
2389         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2390                 goto out;
2391         status = decode_opaque_inline(xdr, &res->fs_pathlen, &res->fs_path);
2392         if (unlikely(status != 0))
2393                 goto out;
2394         READ_BUF(4);
2395         READ32(n);
2396         if (n <= 0)
2397                 goto out_eio;
2398         res->nlocations = 0;
2399         while (res->nlocations < n) {
2400                 struct nfs_fs_location *loc = &res->locations[res->nlocations];
2401
2402                 status = decode_opaque_inline(xdr, &loc->serverlen, &loc->server);
2403                 if (unlikely(status != 0))
2404                         goto out_eio;
2405                 status = decode_opaque_inline(xdr, &loc->rootpathlen, &loc->rootpath);
2406                 if (unlikely(status != 0))
2407                         goto out_eio;
2408                 if (res->nlocations < NFS_FS_LOCATIONS_MAXENTRIES)
2409                         res->nlocations++;
2410         }
2411 out:
2412         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2413         return status;
2414 out_eio:
2415         status = -EIO;
2416         goto out;
2417 }
2418
2419 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2420 {
2421         uint32_t *p;
2422         int status = 0;
2423
2424         *res = 0;
2425         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2426                 return -EIO;
2427         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2428                 READ_BUF(8);
2429                 READ64(*res);
2430                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2431         }
2432         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2433         return status;
2434 }
2435
2436 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2437 {
2438         uint32_t *p;
2439         int status = 0;
2440
2441         *maxlink = 1;
2442         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2443                 return -EIO;
2444         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2445                 READ_BUF(4);
2446                 READ32(*maxlink);
2447                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2448         }
2449         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2450         return status;
2451 }
2452
2453 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2454 {
2455         uint32_t *p;
2456         int status = 0;
2457
2458         *maxname = 1024;
2459         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2460                 return -EIO;
2461         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2462                 READ_BUF(4);
2463                 READ32(*maxname);
2464                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2465         }
2466         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2467         return status;
2468 }
2469
2470 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2471 {
2472         uint32_t *p;
2473         int status = 0;
2474
2475         *res = 1024;
2476         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2477                 return -EIO;
2478         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2479                 uint64_t maxread;
2480                 READ_BUF(8);
2481                 READ64(maxread);
2482                 if (maxread > 0x7FFFFFFF)
2483                         maxread = 0x7FFFFFFF;
2484                 *res = (uint32_t)maxread;
2485                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2486         }
2487         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2488         return status;
2489 }
2490
2491 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2492 {
2493         uint32_t *p;
2494         int status = 0;
2495
2496         *res = 1024;
2497         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2498                 return -EIO;
2499         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2500                 uint64_t maxwrite;
2501                 READ_BUF(8);
2502                 READ64(maxwrite);
2503                 if (maxwrite > 0x7FFFFFFF)
2504                         maxwrite = 0x7FFFFFFF;
2505                 *res = (uint32_t)maxwrite;
2506                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2507         }
2508         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2509         return status;
2510 }
2511
2512 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2513 {
2514         uint32_t *p;
2515
2516         *mode = 0;
2517         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2518                 return -EIO;
2519         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2520                 READ_BUF(4);
2521                 READ32(*mode);
2522                 *mode &= ~S_IFMT;
2523                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2524         }
2525         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2526         return 0;
2527 }
2528
2529 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2530 {
2531         uint32_t *p;
2532
2533         *nlink = 1;
2534         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2535                 return -EIO;
2536         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2537                 READ_BUF(4);
2538                 READ32(*nlink);
2539                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2540         }
2541         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2542         return 0;
2543 }
2544
2545 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
2546 {
2547         uint32_t len, *p;
2548
2549         *uid = -2;
2550         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2551                 return -EIO;
2552         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2553                 READ_BUF(4);
2554                 READ32(len);
2555                 READ_BUF(len);
2556                 if (len < XDR_MAX_NETOBJ) {
2557                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2558                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2559                                                 __FUNCTION__);
2560                 } else
2561                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2562                                         __FUNCTION__, len);
2563                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2564         }
2565         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2566         return 0;
2567 }
2568
2569 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
2570 {
2571         uint32_t len, *p;
2572
2573         *gid = -2;
2574         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2575                 return -EIO;
2576         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2577                 READ_BUF(4);
2578                 READ32(len);
2579                 READ_BUF(len);
2580                 if (len < XDR_MAX_NETOBJ) {
2581                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2582                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2583                                                 __FUNCTION__);
2584                 } else
2585                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2586                                         __FUNCTION__, len);
2587                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2588         }
2589         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2590         return 0;
2591 }
2592
2593 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2594 {
2595         uint32_t major = 0, minor = 0, *p;
2596
2597         *rdev = MKDEV(0,0);
2598         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2599                 return -EIO;
2600         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2601                 dev_t tmp;
2602
2603                 READ_BUF(8);
2604                 READ32(major);
2605                 READ32(minor);
2606                 tmp = MKDEV(major, minor);
2607                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2608                         *rdev = tmp;
2609                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2610         }
2611         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2612         return 0;
2613 }
2614
2615 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2616 {
2617         uint32_t *p;
2618         int status = 0;
2619
2620         *res = 0;
2621         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2622                 return -EIO;
2623         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2624                 READ_BUF(8);
2625                 READ64(*res);
2626                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2627         }
2628         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2629         return status;
2630 }
2631
2632 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2633 {
2634         uint32_t *p;
2635         int status = 0;
2636
2637         *res = 0;
2638         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2639                 return -EIO;
2640         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2641                 READ_BUF(8);
2642                 READ64(*res);
2643                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2644         }
2645         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2646         return status;
2647 }
2648
2649 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2650 {
2651         uint32_t *p;
2652         int status = 0;
2653
2654         *res = 0;
2655         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2656                 return -EIO;
2657         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2658                 READ_BUF(8);
2659                 READ64(*res);
2660                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2661         }
2662         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2663         return status;
2664 }
2665
2666 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2667 {
2668         uint32_t *p;
2669
2670         *used = 0;
2671         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2672                 return -EIO;
2673         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2674                 READ_BUF(8);
2675                 READ64(*used);
2676                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2677         }
2678         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2679                         (unsigned long long)*used);
2680         return 0;
2681 }
2682
2683 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2684 {
2685         uint32_t *p;
2686         uint64_t sec;
2687         uint32_t nsec;
2688
2689         READ_BUF(12);
2690         READ64(sec);
2691         READ32(nsec);
2692         time->tv_sec = (time_t)sec;
2693         time->tv_nsec = (long)nsec;
2694         return 0;
2695 }
2696
2697 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2698 {
2699         int status = 0;
2700
2701         time->tv_sec = 0;
2702         time->tv_nsec = 0;
2703         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2704                 return -EIO;
2705         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2706                 status = decode_attr_time(xdr, time);
2707                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2708         }
2709         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2710         return status;
2711 }
2712
2713 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2714 {
2715         int status = 0;
2716
2717         time->tv_sec = 0;
2718         time->tv_nsec = 0;
2719         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2720                 return -EIO;
2721         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2722                 status = decode_attr_time(xdr, time);
2723                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2724         }
2725         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2726         return status;
2727 }
2728
2729 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2730 {
2731         int status = 0;
2732
2733         time->tv_sec = 0;
2734         time->tv_nsec = 0;
2735         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2736                 return -EIO;
2737         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2738                 status = decode_attr_time(xdr, time);
2739                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2740         }
2741         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2742         return status;
2743 }
2744
2745 static int verify_attr_len(struct xdr_stream *xdr, uint32_t *savep, uint32_t attrlen)
2746 {
2747         unsigned int attrwords = XDR_QUADLEN(attrlen);
2748         unsigned int nwords = xdr->p - savep;
2749
2750         if (unlikely(attrwords != nwords)) {
2751                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2752                                 __FUNCTION__,
2753                                 attrwords << 2,
2754                                 (attrwords < nwords) ? '<' : '>',
2755                                 nwords << 2);
2756                 return -EIO;
2757         }
2758         return 0;
2759 }
2760
2761 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2762 {
2763         uint32_t *p;
2764
2765         READ_BUF(20);
2766         READ32(cinfo->atomic);
2767         READ64(cinfo->before);
2768         READ64(cinfo->after);
2769         return 0;
2770 }
2771
2772 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2773 {
2774         uint32_t *p;
2775         uint32_t supp, acc;
2776         int status;
2777
2778         status = decode_op_hdr(xdr, OP_ACCESS);
2779         if (status)
2780                 return status;
2781         READ_BUF(8);
2782         READ32(supp);
2783         READ32(acc);
2784         access->supported = supp;
2785         access->access = acc;
2786         return 0;
2787 }
2788
2789 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2790 {
2791         uint32_t *p;
2792         int status;
2793
2794         status = decode_op_hdr(xdr, OP_CLOSE);
2795         if (status)
2796                 return status;
2797         READ_BUF(sizeof(res->stateid.data));
2798         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2799         return 0;
2800 }
2801
2802 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2803 {
2804         uint32_t *p;
2805         int status;
2806
2807         status = decode_op_hdr(xdr, OP_COMMIT);
2808         if (status)
2809                 return status;
2810         READ_BUF(8);
2811         COPYMEM(res->verf->verifier, 8);
2812         return 0;
2813 }
2814
2815 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2816 {
2817         uint32_t *p;
2818         uint32_t bmlen;
2819         int status;
2820
2821         status = decode_op_hdr(xdr, OP_CREATE);
2822         if (status)
2823                 return status;
2824         if ((status = decode_change_info(xdr, cinfo)))
2825                 return status;
2826         READ_BUF(4);
2827         READ32(bmlen);
2828         READ_BUF(bmlen << 2);
2829         return 0;
2830 }
2831
2832 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2833 {
2834         uint32_t *savep;
2835         uint32_t attrlen,
2836                  bitmap[2] = {0};
2837         int status;
2838
2839         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2840                 goto xdr_error;
2841         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2842                 goto xdr_error;
2843         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2844                 goto xdr_error;
2845         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2846                 goto xdr_error;
2847         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2848                 goto xdr_error;
2849         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2850                 goto xdr_error;
2851         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2852                 goto xdr_error;
2853         status = verify_attr_len(xdr, savep, attrlen);
2854 xdr_error:
2855         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2856         return status;
2857 }
2858
2859 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2860 {
2861         uint32_t *savep;
2862         uint32_t attrlen,
2863                  bitmap[2] = {0};
2864         int status;
2865
2866         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2867                 goto xdr_error;
2868         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2869                 goto xdr_error;
2870         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2871                 goto xdr_error;
2872
2873         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2874                 goto xdr_error;
2875         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2876                 goto xdr_error;
2877         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2878                 goto xdr_error;
2879         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2880                 goto xdr_error;
2881         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2882                 goto xdr_error;
2883         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2884                 goto xdr_error;
2885
2886         status = verify_attr_len(xdr, savep, attrlen);
2887 xdr_error:
2888         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2889         return status;
2890 }
2891
2892 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2893 {
2894         uint32_t *savep;
2895         uint32_t attrlen,
2896                  bitmap[2] = {0};
2897         int status;
2898
2899         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2900                 goto xdr_error;
2901         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2902                 goto xdr_error;
2903         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2904                 goto xdr_error;
2905
2906         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2907                 goto xdr_error;
2908         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2909                 goto xdr_error;
2910
2911         status = verify_attr_len(xdr, savep, attrlen);
2912 xdr_error:
2913         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2914         return status;
2915 }
2916
2917 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2918 {
2919         uint32_t *savep;
2920         uint32_t attrlen,
2921                  bitmap[2] = {0},
2922                  type;
2923         int status, fmode = 0;
2924
2925         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2926                 goto xdr_error;
2927         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2928                 goto xdr_error;
2929
2930         fattr->bitmap[0] = bitmap[0];
2931         fattr->bitmap[1] = bitmap[1];
2932
2933         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2934                 goto xdr_error;
2935
2936
2937         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
2938                 goto xdr_error;
2939         fattr->type = nfs_type2fmt[type].nfs2type;
2940         fmode = nfs_type2fmt[type].mode;
2941
2942         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
2943                 goto xdr_error;
2944         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
2945                 goto xdr_error;
2946         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
2947                 goto xdr_error;
2948         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
2949                 goto xdr_error;
2950         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
2951                                                 struct nfs_fs_locations,
2952                                                 fattr))) != 0)
2953                 goto xdr_error;
2954         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
2955                 goto xdr_error;
2956         fattr->mode |= fmode;
2957         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
2958                 goto xdr_error;
2959         if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
2960                 goto xdr_error;
2961         if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
2962                 goto xdr_error;
2963         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
2964                 goto xdr_error;
2965         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
2966                 goto xdr_error;
2967         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
2968                 goto xdr_error;
2969         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
2970                 goto xdr_error;
2971         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
2972                 goto xdr_error;
2973         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
2974                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
2975 xdr_error:
2976         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
2977         return status;
2978 }
2979
2980
2981 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
2982 {
2983         uint32_t *savep;
2984         uint32_t attrlen, bitmap[2];
2985         int status;
2986
2987         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2988                 goto xdr_error;
2989         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2990                 goto xdr_error;
2991         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2992                 goto xdr_error;
2993
2994         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
2995
2996         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
2997                 goto xdr_error;
2998         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
2999                 goto xdr_error;
3000         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3001                 goto xdr_error;
3002         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3003         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3004                 goto xdr_error;
3005         fsinfo->wtpref = fsinfo->wtmax;
3006
3007         status = verify_attr_len(xdr, savep, attrlen);
3008 xdr_error:
3009         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3010         return status;
3011 }
3012
3013 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3014 {
3015         uint32_t *p;
3016         uint32_t len;
3017         int status;
3018
3019         status = decode_op_hdr(xdr, OP_GETFH);
3020         if (status)
3021                 return status;
3022         /* Zero handle first to allow comparisons */
3023         memset(fh, 0, sizeof(*fh));
3024
3025         READ_BUF(4);
3026         READ32(len);
3027         if (len > NFS4_FHSIZE)
3028                 return -EIO;
3029         fh->size = len;
3030         READ_BUF(len);
3031         COPYMEM(fh->data, len);
3032         return 0;
3033 }
3034
3035 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3036 {
3037         int status;
3038
3039         status = decode_op_hdr(xdr, OP_LINK);
3040         if (status)
3041                 return status;
3042         return decode_change_info(xdr, cinfo);
3043 }
3044
3045 /*
3046  * We create the owner, so we know a proper owner.id length is 4.
3047  */
3048 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3049 {
3050         uint64_t offset, length, clientid;
3051         uint32_t *p;
3052         uint32_t namelen, type;
3053
3054         READ_BUF(32);
3055         READ64(offset);
3056         READ64(length);
3057         READ32(type);
3058         if (fl != NULL) {
3059                 fl->fl_start = (loff_t)offset;
3060                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3061                 if (length == ~(uint64_t)0)
3062                         fl->fl_end = OFFSET_MAX;
3063                 fl->fl_type = F_WRLCK;
3064                 if (type & 1)
3065                         fl->fl_type = F_RDLCK;
3066                 fl->fl_pid = 0;
3067         }
3068         READ64(clientid);
3069         READ32(namelen);
3070         READ_BUF(namelen);
3071         return -NFS4ERR_DENIED;
3072 }
3073
3074 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3075 {
3076         uint32_t *p;
3077         int status;
3078
3079         status = decode_op_hdr(xdr, OP_LOCK);
3080         if (status == 0) {
3081                 READ_BUF(sizeof(res->stateid.data));
3082                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3083         } else if (status == -NFS4ERR_DENIED)
3084                 return decode_lock_denied(xdr, NULL);
3085         return status;
3086 }
3087
3088 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3089 {
3090         int status;
3091         status = decode_op_hdr(xdr, OP_LOCKT);
3092         if (status == -NFS4ERR_DENIED)
3093                 return decode_lock_denied(xdr, res->denied);
3094         return status;
3095 }
3096
3097 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3098 {
3099         uint32_t *p;
3100         int status;
3101
3102         status = decode_op_hdr(xdr, OP_LOCKU);
3103         if (status == 0) {
3104                 READ_BUF(sizeof(res->stateid.data));
3105                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3106         }
3107         return status;
3108 }
3109
3110 static int decode_lookup(struct xdr_stream *xdr)
3111 {
3112         return decode_op_hdr(xdr, OP_LOOKUP);
3113 }
3114
3115 /* This is too sick! */
3116 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3117 {
3118         uint32_t *p;
3119         uint32_t limit_type, nblocks, blocksize;
3120
3121         READ_BUF(12);
3122         READ32(limit_type);
3123         switch (limit_type) {
3124                 case 1:
3125                         READ64(*maxsize);
3126                         break;
3127                 case 2:
3128                         READ32(nblocks);
3129                         READ32(blocksize);
3130                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3131         }
3132         return 0;
3133 }
3134
3135 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3136 {
3137         uint32_t *p;
3138         uint32_t delegation_type;
3139
3140         READ_BUF(4);
3141         READ32(delegation_type);
3142         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3143                 res->delegation_type = 0;
3144                 return 0;
3145         }
3146         READ_BUF(20);
3147         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3148         READ32(res->do_recall);
3149         switch (delegation_type) {
3150                 case NFS4_OPEN_DELEGATE_READ:
3151                         res->delegation_type = FMODE_READ;
3152                         break;
3153                 case NFS4_OPEN_DELEGATE_WRITE:
3154                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3155                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3156                                 return -EIO;
3157         }
3158         return decode_ace(xdr, NULL, res->server->nfs4_state);
3159 }
3160
3161 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3162 {
3163         uint32_t *p;
3164         uint32_t bmlen;
3165         int status;
3166
3167         status = decode_op_hdr(xdr, OP_OPEN);
3168         if (status)
3169                 return status;
3170         READ_BUF(sizeof(res->stateid.data));
3171         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3172
3173         decode_change_info(xdr, &res->cinfo);
3174
3175         READ_BUF(8);
3176         READ32(res->rflags);
3177         READ32(bmlen);
3178         if (bmlen > 10)
3179                 goto xdr_error;
3180
3181         READ_BUF(bmlen << 2);
3182         p += bmlen;
3183         return decode_delegation(xdr, res);
3184 xdr_error:
3185         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3186         return -EIO;
3187 }
3188
3189 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3190 {
3191         uint32_t *p;
3192         int status;
3193
3194         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3195         if (status)
3196                 return status;
3197         READ_BUF(sizeof(res->stateid.data));
3198         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3199         return 0;
3200 }
3201
3202 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3203 {
3204         uint32_t *p;
3205         int status;
3206
3207         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3208         if (status)
3209                 return status;
3210         READ_BUF(sizeof(res->stateid.data));
3211         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3212         return 0;
3213 }
3214
3215 static int decode_putfh(struct xdr_stream *xdr)
3216 {
3217         return decode_op_hdr(xdr, OP_PUTFH);
3218 }
3219
3220 static int decode_putrootfh(struct xdr_stream *xdr)
3221 {
3222         return decode_op_hdr(xdr, OP_PUTROOTFH);
3223 }
3224
3225 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3226 {
3227         struct kvec *iov = req->rq_rcv_buf.head;
3228         uint32_t *p;
3229         uint32_t count, eof, recvd, hdrlen;
3230         int status;
3231
3232         status = decode_op_hdr(xdr, OP_READ);
3233         if (status)
3234                 return status;
3235         READ_BUF(8);
3236         READ32(eof);
3237         READ32(count);
3238         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3239         recvd = req->rq_rcv_buf.len - hdrlen;
3240         if (count > recvd) {
3241                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3242                                 "count %u > recvd %u\n", count, recvd);
3243                 count = recvd;
3244                 eof = 0;
3245         }
3246         xdr_read_pages(xdr, count);
3247         res->eof = eof;
3248         res->count = count;
3249         return 0;
3250 }
3251
3252 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3253 {
3254         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3255         struct page     *page = *rcvbuf->pages;
3256         struct kvec     *iov = rcvbuf->head;
3257         unsigned int    nr, pglen = rcvbuf->page_len;
3258         uint32_t        *end, *entry, *p, *kaddr;
3259         uint32_t        len, attrlen;
3260         int             hdrlen, recvd, status;
3261
3262         status = decode_op_hdr(xdr, OP_READDIR);
3263         if (status)
3264                 return status;
3265         READ_BUF(8);
3266         COPYMEM(readdir->verifier.data, 8);
3267         dprintk("%s: verifier = 0x%x%x\n",
3268                         __FUNCTION__,
3269                         ((u32 *)readdir->verifier.data)[0],
3270                         ((u32 *)readdir->verifier.data)[1]);
3271
3272
3273         hdrlen = (char *) p - (char *) iov->iov_base;
3274         recvd = rcvbuf->len - hdrlen;
3275         if (pglen > recvd)
3276                 pglen = recvd;
3277         xdr_read_pages(xdr, pglen);
3278
3279         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3280         kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
3281         end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
3282         entry = p;
3283         for (nr = 0; *p++; nr++) {
3284                 if (p + 3 > end)
3285                         goto short_pkt;
3286                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3287                 p += 2;                 /* cookie */
3288                 len = ntohl(*p++);      /* filename length */
3289                 if (len > NFS4_MAXNAMLEN) {
3290                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3291                         goto err_unmap;
3292                 }
3293                 dprintk("filename = %*s\n", len, (char *)p);
3294                 p += XDR_QUADLEN(len);
3295                 if (p + 1 > end)
3296                         goto short_pkt;
3297                 len = ntohl(*p++);      /* bitmap length */
3298                 p += len;
3299                 if (p + 1 > end)
3300                         goto short_pkt;
3301                 attrlen = XDR_QUADLEN(ntohl(*p++));
3302                 p += attrlen;           /* attributes */
3303                 if (p + 2 > end)
3304                         goto short_pkt;
3305                 entry = p;
3306         }
3307         if (!nr && (entry[0] != 0 || entry[1] == 0))
3308                 goto short_pkt;
3309 out:
3310         kunmap_atomic(kaddr, KM_USER0);
3311         return 0;
3312 short_pkt:
3313         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3314         entry[0] = entry[1] = 0;
3315         /* truncate listing ? */
3316         if (!nr) {
3317                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3318                 entry[1] = 1;
3319         }
3320         goto out;
3321 err_unmap:
3322         kunmap_atomic(kaddr, KM_USER0);
3323         return -errno_NFSERR_IO;
3324 }
3325
3326 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3327 {
3328         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3329         struct kvec *iov = rcvbuf->head;
3330         int hdrlen, len, recvd;
3331         uint32_t *p;
3332         char *kaddr;
3333         int status;
3334
3335         status = decode_op_hdr(xdr, OP_READLINK);
3336         if (status)
3337                 return status;
3338
3339         /* Convert length of symlink */
3340         READ_BUF(4);
3341         READ32(len);
3342         if (len >= rcvbuf->page_len || len <= 0) {
3343                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3344                 return -ENAMETOOLONG;
3345         }
3346         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3347         recvd = req->rq_rcv_buf.len - hdrlen;
3348         if (recvd < len) {
3349                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3350                                 "count %u > recvd %u\n", len, recvd);
3351                 return -EIO;
3352         }
3353         xdr_read_pages(xdr, len);
3354         /*
3355          * The XDR encode routine has set things up so that
3356          * the link text will be copied directly into the
3357          * buffer.  We just have to do overflow-checking,
3358          * and and null-terminate the text (the VFS expects
3359          * null-termination).
3360          */
3361         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3362         kaddr[len+rcvbuf->page_base] = '\0';
3363         kunmap_atomic(kaddr, KM_USER0);
3364         return 0;
3365 }
3366
3367 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3368 {
3369         int status;
3370
3371         status = decode_op_hdr(xdr, OP_REMOVE);
3372         if (status)
3373                 goto out;
3374         status = decode_change_info(xdr, cinfo);
3375 out:
3376         return status;
3377 }
3378
3379 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3380               struct nfs4_change_info *new_cinfo)
3381 {
3382         int status;
3383
3384         status = decode_op_hdr(xdr, OP_RENAME);
3385         if (status)
3386                 goto out;
3387         if ((status = decode_change_info(xdr, old_cinfo)))
3388                 goto out;
3389         status = decode_change_info(xdr, new_cinfo);
3390 out:
3391         return status;
3392 }
3393
3394 static int decode_renew(struct xdr_stream *xdr)
3395 {
3396         return decode_op_hdr(xdr, OP_RENEW);
3397 }
3398
3399 static int
3400 decode_restorefh(struct xdr_stream *xdr)
3401 {
3402         return decode_op_hdr(xdr, OP_RESTOREFH);
3403 }
3404
3405 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3406                 size_t *acl_len)
3407 {
3408         uint32_t *savep;
3409         uint32_t attrlen,
3410                  bitmap[2] = {0};
3411         struct kvec *iov = req->rq_rcv_buf.head;
3412         int status;
3413
3414         *acl_len = 0;
3415         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3416                 goto out;
3417         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3418                 goto out;
3419         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3420                 goto out;
3421
3422         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3423                 return -EIO;
3424         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3425                 int hdrlen, recvd;
3426
3427                 /* We ignore &savep and don't do consistency checks on
3428                  * the attr length.  Let userspace figure it out.... */
3429                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3430                 recvd = req->rq_rcv_buf.len - hdrlen;
3431                 if (attrlen > recvd) {
3432                         printk(KERN_WARNING "NFS: server cheating in getattr"
3433                                         " acl reply: attrlen %u > recvd %u\n",
3434                                         attrlen, recvd);
3435                         return -EINVAL;
3436                 }
3437                 xdr_read_pages(xdr, attrlen);
3438                 *acl_len = attrlen;
3439         } else
3440                 status = -EOPNOTSUPP;
3441
3442 out:
3443         return status;
3444 }
3445
3446 static int
3447 decode_savefh(struct xdr_stream *xdr)
3448 {
3449         return decode_op_hdr(xdr, OP_SAVEFH);
3450 }
3451
3452 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3453 {
3454         uint32_t *p;
3455         uint32_t bmlen;
3456         int status;
3457
3458
3459         status = decode_op_hdr(xdr, OP_SETATTR);
3460         if (status)
3461                 return status;
3462         READ_BUF(4);
3463         READ32(bmlen);
3464         READ_BUF(bmlen << 2);
3465         return 0;
3466 }
3467
3468 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
3469 {
3470         uint32_t *p;
3471         uint32_t opnum;
3472         int32_t nfserr;
3473
3474         READ_BUF(8);
3475         READ32(opnum);
3476         if (opnum != OP_SETCLIENTID) {
3477                 printk(KERN_NOTICE
3478                                 "nfs4_decode_setclientid: Server returned operation"
3479                                 " %d\n", opnum);
3480                 return -EIO;
3481         }
3482         READ32(nfserr);
3483         if (nfserr == NFS_OK) {
3484                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3485                 READ64(clp->cl_clientid);
3486                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3487         } else if (nfserr == NFSERR_CLID_INUSE) {
3488                 uint32_t len;
3489
3490                 /* skip netid string */
3491                 READ_BUF(4);
3492                 READ32(len);
3493                 READ_BUF(len);
3494
3495                 /* skip uaddr string */
3496                 READ_BUF(4);
3497                 READ32(len);
3498                 READ_BUF(len);
3499                 return -NFSERR_CLID_INUSE;
3500         } else
3501                 return -nfs_stat_to_errno(nfserr);
3502
3503         return 0;
3504 }
3505
3506 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3507 {
3508         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3509 }
3510
3511 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3512 {
3513         uint32_t *p;
3514         int status;
3515
3516         status = decode_op_hdr(xdr, OP_WRITE);
3517         if (status)
3518                 return status;
3519
3520         READ_BUF(16);
3521         READ32(res->count);
3522         READ32(res->verf->committed);
3523         COPYMEM(res->verf->verifier, 8);
3524         return 0;
3525 }
3526
3527 static int decode_delegreturn(struct xdr_stream *xdr)
3528 {
3529         return decode_op_hdr(xdr, OP_DELEGRETURN);
3530 }
3531
3532 /*
3533  * Decode OPEN_DOWNGRADE response
3534  */
3535 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3536 {
3537         struct xdr_stream xdr;
3538         struct compound_hdr hdr;
3539         int status;
3540
3541         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3542         status = decode_compound_hdr(&xdr, &hdr);
3543         if (status)
3544                 goto out;
3545         status = decode_putfh(&xdr);
3546         if (status)
3547                 goto out;
3548         status = decode_open_downgrade(&xdr, res);
3549         if (status != 0)
3550                 goto out;
3551         decode_getfattr(&xdr, res->fattr, res->server);
3552 out:
3553         return status;
3554 }
3555
3556 /*
3557  * END OF "GENERIC" DECODE ROUTINES.
3558  */
3559
3560 /*
3561  * Decode ACCESS response
3562  */
3563 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_accessres *res)
3564 {
3565         struct xdr_stream xdr;
3566         struct compound_hdr hdr;
3567         int status;
3568
3569         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3570         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3571                 goto out;
3572         if ((status = decode_putfh(&xdr)) == 0)
3573                 status = decode_access(&xdr, res);
3574 out:
3575         return status;
3576 }
3577
3578 /*
3579  * Decode LOOKUP response
3580  */
3581 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3582 {
3583         struct xdr_stream xdr;
3584         struct compound_hdr hdr;
3585         int status;
3586
3587         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3588         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3589                 goto out;
3590         if ((status = decode_putfh(&xdr)) != 0)
3591                 goto out;
3592         if ((status = decode_lookup(&xdr)) != 0)
3593                 goto out;
3594         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3595                 goto out;
3596         status = decode_getfattr(&xdr, res->fattr, res->server);
3597 out:
3598         return status;
3599 }
3600
3601 /*
3602  * Decode LOOKUP_ROOT response
3603  */
3604 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_lookup_res *res)
3605 {
3606         struct xdr_stream xdr;
3607         struct compound_hdr hdr;
3608         int status;
3609
3610         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3611         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3612                 goto out;
3613         if ((status = decode_putrootfh(&xdr)) != 0)
3614                 goto out;
3615         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3616                 status = decode_getfattr(&xdr, res->fattr, res->server);
3617 out:
3618         return status;
3619 }
3620
3621 /*
3622  * Decode REMOVE response
3623  */
3624 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res)
3625 {
3626         struct xdr_stream xdr;
3627         struct compound_hdr hdr;
3628         int status;
3629
3630         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3631         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3632                 goto out;
3633         if ((status = decode_putfh(&xdr)) != 0)
3634                 goto out;
3635         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3636                 goto out;
3637         decode_getfattr(&xdr, res->dir_attr, res->server);
3638 out:
3639         return status;
3640 }
3641
3642 /*
3643  * Decode RENAME response
3644  */
3645 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_rename_res *res)
3646 {
3647         struct xdr_stream xdr;
3648         struct compound_hdr hdr;
3649         int status;
3650
3651         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3652         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3653                 goto out;
3654         if ((status = decode_putfh(&xdr)) != 0)
3655                 goto out;
3656         if ((status = decode_savefh(&xdr)) != 0)
3657                 goto out;
3658         if ((status = decode_putfh(&xdr)) != 0)
3659                 goto out;
3660         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3661                 goto out;
3662         /* Current FH is target directory */
3663         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3664                 goto out;
3665         if ((status = decode_restorefh(&xdr)) != 0)
3666                 goto out;
3667         decode_getfattr(&xdr, res->old_fattr, res->server);
3668 out:
3669         return status;
3670 }
3671
3672 /*
3673  * Decode LINK response
3674  */
3675 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)
3676 {
3677         struct xdr_stream xdr;
3678         struct compound_hdr hdr;
3679         int status;
3680
3681         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3682         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3683                 goto out;
3684         if ((status = decode_putfh(&xdr)) != 0)
3685                 goto out;
3686         if ((status = decode_savefh(&xdr)) != 0)
3687                 goto out;
3688         if ((status = decode_putfh(&xdr)) != 0)
3689                 goto out;
3690         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3691                 goto out;
3692         /*
3693          * Note order: OP_LINK leaves the directory as the current
3694          *             filehandle.
3695          */
3696         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3697                 goto out;
3698         if ((status = decode_restorefh(&xdr)) != 0)
3699                 goto out;
3700         decode_getfattr(&xdr, res->fattr, res->server);
3701 out:
3702         return status;
3703 }
3704
3705 /*
3706  * Decode CREATE response
3707  */
3708 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3709 {
3710         struct xdr_stream xdr;
3711         struct compound_hdr hdr;
3712         int status;
3713
3714         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3715         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3716                 goto out;
3717         if ((status = decode_putfh(&xdr)) != 0)
3718                 goto out;
3719         if ((status = decode_savefh(&xdr)) != 0)
3720                 goto out;
3721         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3722                 goto out;
3723         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3724                 goto out;
3725         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3726                 goto out;
3727         if ((status = decode_restorefh(&xdr)) != 0)
3728                 goto out;
3729         decode_getfattr(&xdr, res->dir_fattr, res->server);
3730 out:
3731         return status;
3732 }
3733
3734 /*
3735  * Decode SYMLINK response
3736  */
3737 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_create_res *res)
3738 {
3739         return nfs4_xdr_dec_create(rqstp, p, res);
3740 }
3741
3742 /*
3743  * Decode GETATTR response
3744  */
3745 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_getattr_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         status = decode_compound_hdr(&xdr, &hdr);
3753         if (status)
3754                 goto out;
3755         status = decode_putfh(&xdr);
3756         if (status)
3757                 goto out;
3758         status = decode_getfattr(&xdr, res->fattr, res->server);
3759 out:
3760         return status;
3761
3762 }
3763
3764 /*
3765  * Encode an SETACL request
3766  */
3767 static int
3768 nfs4_xdr_enc_setacl(struct rpc_rqst *req, uint32_t *p, struct nfs_setaclargs *args)
3769 {
3770         struct xdr_stream xdr;
3771         struct compound_hdr hdr = {
3772                 .nops   = 2,
3773         };
3774         int status;
3775
3776         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3777         encode_compound_hdr(&xdr, &hdr);
3778         status = encode_putfh(&xdr, args->fh);
3779         if (status)
3780                 goto out;
3781         status = encode_setacl(&xdr, args);
3782 out:
3783         return status;
3784 }
3785 /*
3786  * Decode SETACL response
3787  */
3788 static int
3789 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, uint32_t *p, void *res)
3790 {
3791         struct xdr_stream xdr;
3792         struct compound_hdr hdr;
3793         int status;
3794
3795         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3796         status = decode_compound_hdr(&xdr, &hdr);
3797         if (status)
3798                 goto out;
3799         status = decode_putfh(&xdr);
3800         if (status)
3801                 goto out;
3802         status = decode_setattr(&xdr, res);
3803 out:
3804         return status;
3805 }
3806
3807 /*
3808  * Decode GETACL response
3809  */
3810 static int
3811 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, uint32_t *p, size_t *acl_len)
3812 {
3813         struct xdr_stream xdr;
3814         struct compound_hdr hdr;
3815         int status;
3816
3817         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3818         status = decode_compound_hdr(&xdr, &hdr);
3819         if (status)
3820                 goto out;
3821         status = decode_putfh(&xdr);
3822         if (status)
3823                 goto out;
3824         status = decode_getacl(&xdr, rqstp, acl_len);
3825
3826 out:
3827         return status;
3828 }
3829
3830 /*
3831  * Decode CLOSE response
3832  */
3833 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_closeres *res)
3834 {
3835         struct xdr_stream xdr;
3836         struct compound_hdr hdr;
3837         int status;
3838
3839         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3840         status = decode_compound_hdr(&xdr, &hdr);
3841         if (status)
3842                 goto out;
3843         status = decode_putfh(&xdr);
3844         if (status)
3845                 goto out;
3846         status = decode_close(&xdr, res);
3847         if (status != 0)
3848                 goto out;
3849         /*
3850          * Note: Server may do delete on close for this file
3851          *      in which case the getattr call will fail with
3852          *      an ESTALE error. Shouldn't be a problem,
3853          *      though, since fattr->valid will remain unset.
3854          */
3855         decode_getfattr(&xdr, res->fattr, res->server);
3856 out:
3857         return status;
3858 }
3859
3860 /*
3861  * Decode OPEN response
3862  */
3863 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3864 {
3865         struct xdr_stream xdr;
3866         struct compound_hdr hdr;
3867         int status;
3868
3869         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3870         status = decode_compound_hdr(&xdr, &hdr);
3871         if (status)
3872                 goto out;
3873         status = decode_putfh(&xdr);
3874         if (status)
3875                 goto out;
3876         status = decode_savefh(&xdr);
3877         if (status)
3878                 goto out;
3879         status = decode_open(&xdr, res);
3880         if (status)
3881                 goto out;
3882         status = decode_getfh(&xdr, &res->fh);
3883         if (status)
3884                 goto out;
3885         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3886                 goto out;
3887         if ((status = decode_restorefh(&xdr)) != 0)
3888                 goto out;
3889         decode_getfattr(&xdr, res->dir_attr, res->server);
3890 out:
3891         return status;
3892 }
3893
3894 /*
3895  * Decode OPEN_CONFIRM response
3896  */
3897 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_open_confirmres *res)
3898 {
3899         struct xdr_stream xdr;
3900         struct compound_hdr hdr;
3901         int status;
3902
3903         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3904         status = decode_compound_hdr(&xdr, &hdr);
3905         if (status)
3906                 goto out;
3907         status = decode_putfh(&xdr);
3908         if (status)
3909                 goto out;
3910         status = decode_open_confirm(&xdr, res);
3911 out:
3912         return status;
3913 }
3914
3915 /*
3916  * Decode OPEN response
3917  */
3918 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_openres *res)
3919 {
3920         struct xdr_stream xdr;
3921         struct compound_hdr hdr;
3922         int status;
3923
3924         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3925         status = decode_compound_hdr(&xdr, &hdr);
3926         if (status)
3927                 goto out;
3928         status = decode_putfh(&xdr);
3929         if (status)
3930                 goto out;
3931         status = decode_open(&xdr, res);
3932         if (status)
3933                 goto out;
3934         decode_getfattr(&xdr, res->f_attr, res->server);
3935 out:
3936         return status;
3937 }
3938
3939 /*
3940  * Decode SETATTR response
3941  */
3942 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_setattrres *res)
3943 {
3944         struct xdr_stream xdr;
3945         struct compound_hdr hdr;
3946         int status;
3947
3948         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3949         status = decode_compound_hdr(&xdr, &hdr);
3950         if (status)
3951                 goto out;
3952         status = decode_putfh(&xdr);
3953         if (status)
3954                 goto out;
3955         status = decode_setattr(&xdr, res);
3956         if (status)
3957                 goto out;
3958         status = decode_getfattr(&xdr, res->fattr, res->server);
3959         if (status == NFS4ERR_DELAY)
3960                 status = 0;
3961 out:
3962         return status;
3963 }
3964
3965 /*
3966  * Decode LOCK response
3967  */
3968 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lock_res *res)
3969 {
3970         struct xdr_stream xdr;
3971         struct compound_hdr hdr;
3972         int status;
3973
3974         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3975         status = decode_compound_hdr(&xdr, &hdr);
3976         if (status)
3977                 goto out;
3978         status = decode_putfh(&xdr);
3979         if (status)
3980                 goto out;
3981         status = decode_lock(&xdr, res);
3982 out:
3983         return status;
3984 }
3985
3986 /*
3987  * Decode LOCKT response
3988  */
3989 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_lockt_res *res)
3990 {
3991         struct xdr_stream xdr;
3992         struct compound_hdr hdr;
3993         int status;
3994
3995         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3996         status = decode_compound_hdr(&xdr, &hdr);
3997         if (status)
3998                 goto out;
3999         status = decode_putfh(&xdr);
4000         if (status)
4001                 goto out;
4002         status = decode_lockt(&xdr, res);
4003 out:
4004         return status;
4005 }
4006
4007 /*
4008  * Decode LOCKU response
4009  */
4010 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_locku_res *res)
4011 {
4012         struct xdr_stream xdr;
4013         struct compound_hdr hdr;
4014         int status;
4015
4016         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4017         status = decode_compound_hdr(&xdr, &hdr);
4018         if (status)
4019                 goto out;
4020         status = decode_putfh(&xdr);
4021         if (status)
4022                 goto out;
4023         status = decode_locku(&xdr, res);
4024 out:
4025         return status;
4026 }
4027
4028 /*
4029  * Decode READLINK response
4030  */
4031 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, uint32_t *p, void *res)
4032 {
4033         struct xdr_stream xdr;
4034         struct compound_hdr hdr;
4035         int status;
4036
4037         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4038         status = decode_compound_hdr(&xdr, &hdr);
4039         if (status)
4040                 goto out;
4041         status = decode_putfh(&xdr);
4042         if (status)
4043                 goto out;
4044         status = decode_readlink(&xdr, rqstp);
4045 out:
4046         return status;
4047 }
4048
4049 /*
4050  * Decode READDIR response
4051  */
4052 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_readdir_res *res)
4053 {
4054         struct xdr_stream xdr;
4055         struct compound_hdr hdr;
4056         int status;
4057
4058         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4059         status = decode_compound_hdr(&xdr, &hdr);
4060         if (status)
4061                 goto out;
4062         status = decode_putfh(&xdr);
4063         if (status)
4064                 goto out;
4065         status = decode_readdir(&xdr, rqstp, res);
4066 out:
4067         return status;
4068 }
4069
4070 /*
4071  * Decode Read response
4072  */
4073 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
4074 {
4075         struct xdr_stream xdr;
4076         struct compound_hdr hdr;
4077         int status;
4078
4079         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4080         status = decode_compound_hdr(&xdr, &hdr);
4081         if (status)
4082                 goto out;
4083         status = decode_putfh(&xdr);
4084         if (status)
4085                 goto out;
4086         status = decode_read(&xdr, rqstp, res);
4087         if (!status)
4088                 status = res->count;
4089 out:
4090         return status;
4091 }
4092
4093 /*
4094  * Decode WRITE response
4095  */
4096 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4097 {
4098         struct xdr_stream xdr;
4099         struct compound_hdr hdr;
4100         int status;
4101
4102         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4103         status = decode_compound_hdr(&xdr, &hdr);
4104         if (status)
4105                 goto out;
4106         status = decode_putfh(&xdr);
4107         if (status)
4108                 goto out;
4109         status = decode_write(&xdr, res);
4110         if (status)
4111                 goto out;
4112         decode_getfattr(&xdr, res->fattr, res->server);
4113         if (!status)
4114                 status = res->count;
4115 out:
4116         return status;
4117 }
4118
4119 /*
4120  * Decode COMMIT response
4121  */
4122 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res)
4123 {
4124         struct xdr_stream xdr;
4125         struct compound_hdr hdr;
4126         int status;
4127
4128         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4129         status = decode_compound_hdr(&xdr, &hdr);
4130         if (status)
4131                 goto out;
4132         status = decode_putfh(&xdr);
4133         if (status)
4134                 goto out;
4135         status = decode_commit(&xdr, res);
4136         if (status)
4137                 goto out;
4138         decode_getfattr(&xdr, res->fattr, res->server);
4139 out:
4140         return status;
4141 }
4142
4143 /*
4144  * FSINFO request
4145  */
4146 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4147 {
4148         struct xdr_stream xdr;
4149         struct compound_hdr hdr;
4150         int status;
4151
4152         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4153         status = decode_compound_hdr(&xdr, &hdr);
4154         if (!status)
4155                 status = decode_putfh(&xdr);
4156         if (!status)
4157                 status = decode_fsinfo(&xdr, fsinfo);
4158         if (!status)
4159                 status = -nfs_stat_to_errno(hdr.status);
4160         return status;
4161 }
4162
4163 /*
4164  * PATHCONF request
4165  */
4166 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, uint32_t *p, struct nfs_pathconf *pathconf)
4167 {
4168         struct xdr_stream xdr;
4169         struct compound_hdr hdr;
4170         int status;
4171
4172         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4173         status = decode_compound_hdr(&xdr, &hdr);
4174         if (!status)
4175                 status = decode_putfh(&xdr);
4176         if (!status)
4177                 status = decode_pathconf(&xdr, pathconf);
4178         return status;
4179 }
4180
4181 /*
4182  * STATFS request
4183  */
4184 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, uint32_t *p, struct nfs_fsstat *fsstat)
4185 {
4186         struct xdr_stream xdr;
4187         struct compound_hdr hdr;
4188         int status;
4189
4190         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4191         status = decode_compound_hdr(&xdr, &hdr);
4192         if (!status)
4193                 status = decode_putfh(&xdr);
4194         if (!status)
4195                 status = decode_statfs(&xdr, fsstat);
4196         return status;
4197 }
4198
4199 /*
4200  * GETATTR_BITMAP request
4201  */
4202 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, uint32_t *p, struct nfs4_server_caps_res *res)
4203 {
4204         struct xdr_stream xdr;
4205         struct compound_hdr hdr;
4206         int status;
4207
4208         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4209         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4210                 goto out;
4211         if ((status = decode_putfh(&xdr)) != 0)
4212                 goto out;
4213         status = decode_server_caps(&xdr, res);
4214 out:
4215         return status;
4216 }
4217
4218 /*
4219  * Decode RENEW response
4220  */
4221 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
4222 {
4223         struct xdr_stream xdr;
4224         struct compound_hdr hdr;
4225         int status;
4226
4227         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4228         status = decode_compound_hdr(&xdr, &hdr);
4229         if (!status)
4230                 status = decode_renew(&xdr);
4231         return status;
4232 }
4233
4234 /*
4235  * a SETCLIENTID request
4236  */
4237 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
4238                 struct nfs4_client *clp)
4239 {
4240         struct xdr_stream xdr;
4241         struct compound_hdr hdr;
4242         int status;
4243
4244         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4245         status = decode_compound_hdr(&xdr, &hdr);
4246         if (!status)
4247                 status = decode_setclientid(&xdr, clp);
4248         if (!status)
4249                 status = -nfs_stat_to_errno(hdr.status);
4250         return status;
4251 }
4252
4253 /*
4254  * a SETCLIENTID_CONFIRM request
4255  */
4256 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_fsinfo *fsinfo)
4257 {
4258         struct xdr_stream xdr;
4259         struct compound_hdr hdr;
4260         int status;
4261
4262         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4263         status = decode_compound_hdr(&xdr, &hdr);
4264         if (!status)
4265                 status = decode_setclientid_confirm(&xdr);
4266         if (!status)
4267                 status = decode_putrootfh(&xdr);
4268         if (!status)
4269                 status = decode_fsinfo(&xdr, fsinfo);
4270         if (!status)
4271                 status = -nfs_stat_to_errno(hdr.status);
4272         return status;
4273 }
4274
4275 /*
4276  * DELEGRETURN request
4277  */
4278 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_delegreturnres *res)
4279 {
4280         struct xdr_stream xdr;
4281         struct compound_hdr hdr;
4282         int status;
4283
4284         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4285         status = decode_compound_hdr(&xdr, &hdr);
4286         if (status != 0)
4287                 goto out;
4288         status = decode_putfh(&xdr);
4289         if (status != 0)
4290                 goto out;
4291         status = decode_delegreturn(&xdr);
4292         decode_getfattr(&xdr, res->fattr, res->server);
4293 out:
4294         return status;
4295 }
4296
4297 /*
4298  * FS_LOCATIONS request
4299  */
4300 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs_fs_locations *res)
4301 {
4302         struct xdr_stream xdr;
4303         struct compound_hdr hdr;
4304         int status;
4305
4306         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4307         status = decode_compound_hdr(&xdr, &hdr);
4308         if (status != 0)
4309                 goto out;
4310         if ((status = decode_putfh(&xdr)) != 0)
4311                 goto out;
4312         if ((status = decode_lookup(&xdr)) != 0)
4313                 goto out;
4314         xdr_enter_page(&xdr, PAGE_SIZE);
4315         status = decode_getfattr(&xdr, &res->fattr, res->server);
4316 out:
4317         return status;
4318 }
4319
4320 uint32_t *nfs4_decode_dirent(uint32_t *p, struct nfs_entry *entry, int plus)
4321 {
4322         uint32_t bitmap[2] = {0};
4323         uint32_t len;
4324
4325         if (!*p++) {
4326                 if (!*p)
4327                         return ERR_PTR(-EAGAIN);
4328                 entry->eof = 1;
4329                 return ERR_PTR(-EBADCOOKIE);
4330         }
4331
4332         entry->prev_cookie = entry->cookie;
4333         p = xdr_decode_hyper(p, &entry->cookie);
4334         entry->len = ntohl(*p++);
4335         entry->name = (const char *) p;
4336         p += XDR_QUADLEN(entry->len);
4337
4338         /*
4339          * In case the server doesn't return an inode number,
4340          * we fake one here.  (We don't use inode number 0,
4341          * since glibc seems to choke on it...)
4342          */
4343         entry->ino = 1;
4344
4345         len = ntohl(*p++);              /* bitmap length */
4346         if (len-- > 0) {
4347                 bitmap[0] = ntohl(*p++);
4348                 if (len-- > 0) {
4349                         bitmap[1] = ntohl(*p++);
4350                         p += len;
4351                 }
4352         }
4353         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4354         if (len > 0) {
4355                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4356                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4357                         /* Ignore the return value of rdattr_error for now */
4358                         p++;
4359                         len--;
4360                 }
4361                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4362                         xdr_decode_hyper(p, &entry->ino);
4363                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4364                         xdr_decode_hyper(p, &entry->ino);
4365                 p += len;
4366         }
4367
4368         entry->eof = !p[0] && p[1];
4369         return p;
4370 }
4371
4372 /*
4373  * We need to translate between nfs status return values and
4374  * the local errno values which may not be the same.
4375  */
4376 static struct {
4377         int stat;
4378         int errno;
4379 } nfs_errtbl[] = {
4380         { NFS4_OK,              0               },
4381         { NFS4ERR_PERM,         EPERM           },
4382         { NFS4ERR_NOENT,        ENOENT          },
4383         { NFS4ERR_IO,           errno_NFSERR_IO },
4384         { NFS4ERR_NXIO,         ENXIO           },
4385         { NFS4ERR_ACCESS,       EACCES          },
4386         { NFS4ERR_EXIST,        EEXIST          },
4387         { NFS4ERR_XDEV,         EXDEV           },
4388         { NFS4ERR_NOTDIR,       ENOTDIR         },
4389         { NFS4ERR_ISDIR,        EISDIR          },
4390         { NFS4ERR_INVAL,        EINVAL          },
4391         { NFS4ERR_FBIG,         EFBIG           },
4392         { NFS4ERR_NOSPC,        ENOSPC          },
4393         { NFS4ERR_ROFS,         EROFS           },
4394         { NFS4ERR_MLINK,        EMLINK          },
4395         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4396         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4397         { NFS4ERR_DQUOT,        EDQUOT          },
4398         { NFS4ERR_STALE,        ESTALE          },
4399         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4400         { NFS4ERR_BADOWNER,     EINVAL          },
4401         { NFS4ERR_BADNAME,      EINVAL          },
4402         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4403         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4404         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4405         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4406         { NFS4ERR_BADTYPE,      EBADTYPE        },
4407         { NFS4ERR_LOCKED,       EAGAIN          },
4408         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4409         { NFS4ERR_SYMLINK,      ELOOP           },
4410         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4411         { NFS4ERR_DEADLOCK,     EDEADLK         },
4412         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4413                                                     * to be handled by a
4414                                                     * middle-layer.
4415                                                     */
4416         { -1,                   EIO             }
4417 };
4418
4419 /*
4420  * Convert an NFS error code to a local one.
4421  * This one is used jointly by NFSv2 and NFSv3.
4422  */
4423 static int
4424 nfs_stat_to_errno(int stat)
4425 {
4426         int i;
4427         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4428                 if (nfs_errtbl[i].stat == stat)
4429                         return nfs_errtbl[i].errno;
4430         }
4431         if (stat <= 10000 || stat > 10100) {
4432                 /* The server is looney tunes. */
4433                 return ESERVERFAULT;
4434         }
4435         /* If we cannot translate the error, the recovery routines should
4436          * handle it.
4437          * Note: remaining NFSv4 error codes have values > 10000, so should
4438          * not conflict with native Linux error codes.
4439          */
4440         return stat;
4441 }
4442
4443 #ifndef MAX
4444 # define MAX(a, b)      (((a) > (b))? (a) : (b))
4445 #endif
4446
4447 #define PROC(proc, argtype, restype)                            \
4448 [NFSPROC4_CLNT_##proc] = {                                      \
4449         .p_proc   = NFSPROC4_COMPOUND,                          \
4450         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4451         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4452         .p_bufsiz = MAX(NFS4_##argtype##_sz,NFS4_##restype##_sz) << 2,  \
4453         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4454         .p_name   = #proc,                                      \
4455     }
4456
4457 struct rpc_procinfo     nfs4_procedures[] = {
4458   PROC(READ,            enc_read,       dec_read),
4459   PROC(WRITE,           enc_write,      dec_write),
4460   PROC(COMMIT,          enc_commit,     dec_commit),
4461   PROC(OPEN,            enc_open,       dec_open),
4462   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4463   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4464   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4465   PROC(CLOSE,           enc_close,      dec_close),
4466   PROC(SETATTR,         enc_setattr,    dec_setattr),
4467   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4468   PROC(RENEW,           enc_renew,      dec_renew),
4469   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4470   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4471   PROC(LOCK,            enc_lock,       dec_lock),
4472   PROC(LOCKT,           enc_lockt,      dec_lockt),
4473   PROC(LOCKU,           enc_locku,      dec_locku),
4474   PROC(ACCESS,          enc_access,     dec_access),
4475   PROC(GETATTR,         enc_getattr,    dec_getattr),
4476   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4477   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4478   PROC(REMOVE,          enc_remove,     dec_remove),
4479   PROC(RENAME,          enc_rename,     dec_rename),
4480   PROC(LINK,            enc_link,       dec_link),
4481   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4482   PROC(CREATE,          enc_create,     dec_create),
4483   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4484   PROC(STATFS,          enc_statfs,     dec_statfs),
4485   PROC(READLINK,        enc_readlink,   dec_readlink),
4486   PROC(READDIR,         enc_readdir,    dec_readdir),
4487   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4488   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4489   PROC(GETACL,          enc_getacl,     dec_getacl),
4490   PROC(SETACL,          enc_setacl,     dec_setacl),
4491   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4492 };
4493
4494 struct rpc_version              nfs_version4 = {
4495         .number                 = 4,
4496         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4497         .procs                  = nfs4_procedures
4498 };
4499
4500 /*
4501  * Local variables:
4502  *  c-basic-offset: 8
4503  * End:
4504  */