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   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define owner_id_maxsz          (1 + 1)
  74 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  75 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define op_encode_hdr_maxsz     (1)
  77 #define op_decode_hdr_maxsz     (2)
  78 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  79                                 (NFS4_FHSIZE >> 2))
  80 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  81 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  82 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  83 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  84 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  85                                 ((3+NFS4_FHSIZE) >> 2))
  86 #define nfs4_fattr_bitmap_maxsz 3
  87 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  88 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  89 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  90 /* This is based on getfattr, which uses the most attributes: */
  91 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  92                                 3 + 3 + 3 + 2 * nfs4_name_maxsz))
  93 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  94                                 nfs4_fattr_value_maxsz)
  95 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  96 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
  97 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
  98 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
  99 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 100 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 101 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 102 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 103 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 104 #define encode_setclientid_maxsz \
 105                                 (op_encode_hdr_maxsz + \
 106                                 4 /*server->ip_addr*/ + \
 107                                 1 /*Netid*/ + \
 108                                 6 /*uaddr*/ + \
 109                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 110 #define decode_setclientid_maxsz \
 111                                 (op_decode_hdr_maxsz + \
 112                                 2 + \
 113                                 1024) /* large value for CLID_INUSE */
 114 #define encode_setclientid_confirm_maxsz \
 115                                 (op_encode_hdr_maxsz + \
 116                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 117 #define decode_setclientid_confirm_maxsz \
 118                                 (op_decode_hdr_maxsz)
 119 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 120                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 121 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 122                                 nfs4_name_maxsz)
 123 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 124                                 2 * nfs4_name_maxsz)
 125 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 126 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 127                                 nfs4_name_maxsz)
 128 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 129 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 130                                 1 + nfs4_name_maxsz + \
 131                                 1 + \
 132                                 nfs4_fattr_maxsz)
 133 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 134 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 135                                 2 + nfs4_name_maxsz + \
 136                                 nfs4_fattr_maxsz)
 137 #define decode_create_maxsz     (op_decode_hdr_maxsz + 8)
 138 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 139 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 140 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 141 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 142 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 143                                 encode_putfh_maxsz + \
 144                                 op_encode_hdr_maxsz + 7)
 145 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 146                                 decode_putfh_maxsz + \
 147                                 op_decode_hdr_maxsz + 2)
 148 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 149                                 encode_putfh_maxsz + \
 150                                 op_encode_hdr_maxsz)
 151 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 152                                 decode_putfh_maxsz + \
 153                                 op_decode_hdr_maxsz)
 154 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 155                                 encode_putfh_maxsz + \
 156                                 op_encode_hdr_maxsz + 9)
 157 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 158                                 decode_putfh_maxsz + \
 159                                 op_decode_hdr_maxsz + 2)
 160 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 161                                 encode_putfh_maxsz + \
 162                                 op_encode_hdr_maxsz + 8 + \
 163                                 encode_getattr_maxsz)
 164 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 165                                 decode_putfh_maxsz + \
 166                                 op_decode_hdr_maxsz + 4 + \
 167                                 decode_getattr_maxsz)
 168 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 169                                 encode_putfh_maxsz + \
 170                                 op_encode_hdr_maxsz + 3 + \
 171                                 encode_getattr_maxsz)
 172 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 173                                 decode_putfh_maxsz + \
 174                                 op_decode_hdr_maxsz + 2 + \
 175                                 decode_getattr_maxsz)
 176 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 177                                 encode_putfh_maxsz + \
 178                                 op_encode_hdr_maxsz + \
 179                                 13 + 3 + 2 + 64 + \
 180                                 encode_getattr_maxsz + \
 181                                 encode_getfh_maxsz)
 182 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 183                                 decode_putfh_maxsz + \
 184                                 op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
 185                                 decode_getattr_maxsz + \
 186                                 decode_getfh_maxsz)
 187 #define NFS4_enc_open_confirm_sz      \
 188                                 (compound_encode_hdr_maxsz + \
 189                                 encode_putfh_maxsz + \
 190                                 op_encode_hdr_maxsz + 5)
 191 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 192                                         decode_putfh_maxsz + \
 193                                         op_decode_hdr_maxsz + 4)
 194 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 195                                         encode_putfh_maxsz + \
 196                                         op_encode_hdr_maxsz + \
 197                                         11)
 198 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 199                                         decode_putfh_maxsz + \
 200                                         op_decode_hdr_maxsz + \
 201                                         4 + 5 + 2 + 3)
 202 #define NFS4_enc_open_downgrade_sz \
 203                                 (compound_encode_hdr_maxsz + \
 204                                 encode_putfh_maxsz + \
 205                                 op_encode_hdr_maxsz + 7 + \
 206                                 encode_getattr_maxsz)
 207 #define NFS4_dec_open_downgrade_sz \
 208                                 (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 op_decode_hdr_maxsz + 4 + \
 211                                 decode_getattr_maxsz)
 212 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 213                                 encode_putfh_maxsz + \
 214                                 op_encode_hdr_maxsz + 5 + \
 215                                 encode_getattr_maxsz)
 216 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 217                                 decode_putfh_maxsz + \
 218                                 op_decode_hdr_maxsz + 4 + \
 219                                 decode_getattr_maxsz)
 220 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 221                                 encode_putfh_maxsz + \
 222                                 op_encode_hdr_maxsz + 4 + \
 223                                 nfs4_fattr_maxsz + \
 224                                 encode_getattr_maxsz)
 225 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 226                                 decode_putfh_maxsz + \
 227                                 op_decode_hdr_maxsz + 3 + \
 228                                 nfs4_fattr_maxsz)
 229 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 230                                 encode_putfh_maxsz + \
 231                                 encode_fsinfo_maxsz)
 232 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 233                                 decode_putfh_maxsz + \
 234                                 decode_fsinfo_maxsz)
 235 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 236                                 encode_renew_maxsz)
 237 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 238                                 decode_renew_maxsz)
 239 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 240                                 encode_setclientid_maxsz)
 241 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 242                                 decode_setclientid_maxsz)
 243 #define NFS4_enc_setclientid_confirm_sz \
 244                                 (compound_encode_hdr_maxsz + \
 245                                 encode_setclientid_confirm_maxsz + \
 246                                 encode_putrootfh_maxsz + \
 247                                 encode_fsinfo_maxsz)
 248 #define NFS4_dec_setclientid_confirm_sz \
 249                                 (compound_decode_hdr_maxsz + \
 250                                 decode_setclientid_confirm_maxsz + \
 251                                 decode_putrootfh_maxsz + \
 252                                 decode_fsinfo_maxsz)
 253 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 254                                 encode_putfh_maxsz + \
 255                                 encode_getattr_maxsz + \
 256                                 op_encode_hdr_maxsz + \
 257                                 1 + 1 + 2 + 2 + \
 258                                 1 + 4 + 1 + 2 + \
 259                                 owner_id_maxsz)
 260 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_getattr_maxsz + \
 263                                 op_decode_hdr_maxsz + \
 264                                 2 + 2 + 1 + 2 + \
 265                                 owner_id_maxsz)
 266 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 267                                 encode_putfh_maxsz + \
 268                                 encode_getattr_maxsz + \
 269                                 op_encode_hdr_maxsz + \
 270                                 1 + 2 + 2 + 2 + \
 271                                 owner_id_maxsz)
 272 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 273 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 274                                 encode_putfh_maxsz + \
 275                                 encode_getattr_maxsz + \
 276                                 op_encode_hdr_maxsz + \
 277                                 1 + 1 + 4 + 2 + 2)
 278 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 279                                 decode_putfh_maxsz + \
 280                                 decode_getattr_maxsz + \
 281                                 op_decode_hdr_maxsz + 4)
 282 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 283                                 encode_putfh_maxsz + \
 284                                 op_encode_hdr_maxsz + 1)
 285 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 286                                 decode_putfh_maxsz + \
 287                                 op_decode_hdr_maxsz + 2)
 288 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 289                                 encode_putfh_maxsz + \
 290                                 encode_getattr_maxsz)
 291 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 292                                 decode_putfh_maxsz + \
 293                                 decode_getattr_maxsz)
 294 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 295                                 encode_putfh_maxsz + \
 296                                 encode_lookup_maxsz + \
 297                                 encode_getattr_maxsz + \
 298                                 encode_getfh_maxsz)
 299 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 300                                 decode_putfh_maxsz + \
 301                                 op_decode_hdr_maxsz + \
 302                                 decode_getattr_maxsz + \
 303                                 decode_getfh_maxsz)
 304 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 305                                 encode_putrootfh_maxsz + \
 306                                 encode_getattr_maxsz + \
 307                                 encode_getfh_maxsz)
 308 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 309                                 decode_putrootfh_maxsz + \
 310                                 decode_getattr_maxsz + \
 311                                 decode_getfh_maxsz)
 312 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 313                                 encode_putfh_maxsz + \
 314                                 encode_remove_maxsz + \
 315                                 encode_getattr_maxsz)
 316 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 317                                 decode_putfh_maxsz + \
 318                                 op_decode_hdr_maxsz + 5 + \
 319                                 decode_getattr_maxsz)
 320 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 321                                 encode_putfh_maxsz + \
 322                                 encode_savefh_maxsz + \
 323                                 encode_putfh_maxsz + \
 324                                 encode_rename_maxsz + \
 325                                 encode_getattr_maxsz + \
 326                                 encode_restorefh_maxsz + \
 327                                 encode_getattr_maxsz)
 328 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 329                                 decode_putfh_maxsz + \
 330                                 decode_savefh_maxsz + \
 331                                 decode_putfh_maxsz + \
 332                                 decode_rename_maxsz + \
 333                                 decode_getattr_maxsz + \
 334                                 decode_restorefh_maxsz + \
 335                                 decode_getattr_maxsz)
 336 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 337                                 encode_putfh_maxsz + \
 338                                 encode_savefh_maxsz + \
 339                                 encode_putfh_maxsz + \
 340                                 encode_link_maxsz + \
 341                                 decode_getattr_maxsz + \
 342                                 encode_restorefh_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 345                                 decode_putfh_maxsz + \
 346                                 decode_savefh_maxsz + \
 347                                 decode_putfh_maxsz + \
 348                                 decode_link_maxsz + \
 349                                 decode_getattr_maxsz + \
 350                                 decode_restorefh_maxsz + \
 351                                 decode_getattr_maxsz)
 352 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 353                                 encode_putfh_maxsz + \
 354                                 encode_symlink_maxsz + \
 355                                 encode_getattr_maxsz + \
 356                                 encode_getfh_maxsz)
 357 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 358                                 decode_putfh_maxsz + \
 359                                 decode_symlink_maxsz + \
 360                                 decode_getattr_maxsz + \
 361                                 decode_getfh_maxsz)
 362 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 363                                 encode_putfh_maxsz + \
 364                                 encode_savefh_maxsz + \
 365                                 encode_create_maxsz + \
 366                                 encode_getfh_maxsz + \
 367                                 encode_getattr_maxsz + \
 368                                 encode_restorefh_maxsz + \
 369                                 encode_getattr_maxsz)
 370 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 371                                 decode_putfh_maxsz + \
 372                                 decode_savefh_maxsz + \
 373                                 decode_create_maxsz + \
 374                                 decode_getfh_maxsz + \
 375                                 decode_getattr_maxsz + \
 376                                 decode_restorefh_maxsz + \
 377                                 decode_getattr_maxsz)
 378 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 379                                 encode_putfh_maxsz + \
 380                                 encode_getattr_maxsz)
 381 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 382                                 decode_putfh_maxsz + \
 383                                 decode_getattr_maxsz)
 384 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 385                                 encode_putfh_maxsz + \
 386                                 encode_getattr_maxsz)
 387 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 388                                 decode_putfh_maxsz + \
 389                                 op_decode_hdr_maxsz + 12)
 390 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 391                                 encode_putfh_maxsz + \
 392                                 encode_getattr_maxsz)
 393 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 394                                 decode_putfh_maxsz + \
 395                                 decode_getattr_maxsz)
 396 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 397                                 encode_putfh_maxsz + \
 398                                 encode_delegreturn_maxsz + \
 399                                 encode_getattr_maxsz)
 400 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 401                                 decode_delegreturn_maxsz + \
 402                                 decode_getattr_maxsz)
 403 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 404                                 encode_putfh_maxsz + \
 405                                 encode_getattr_maxsz)
 406 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 407                                 decode_putfh_maxsz + \
 408                                 op_decode_hdr_maxsz + \
 409                                 nfs4_fattr_bitmap_maxsz + 1)
 410 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 411                                 encode_putfh_maxsz + \
 412                                 op_encode_hdr_maxsz + 4 + \
 413                                 nfs4_fattr_bitmap_maxsz + 1)
 414 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 415                                 decode_putfh_maxsz + \
 416                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 417 #define NFS4_enc_fs_locations_sz \
 418                                 (compound_encode_hdr_maxsz + \
 419                                  encode_putfh_maxsz + \
 420                                  encode_getattr_maxsz)
 421 #define NFS4_dec_fs_locations_sz \
 422                                 (compound_decode_hdr_maxsz + \
 423                                  decode_putfh_maxsz + \
 424                                  op_decode_hdr_maxsz + \
 425                                  nfs4_fattr_bitmap_maxsz)
 426
 427 static struct {
 428         unsigned int    mode;
 429         unsigned int    nfs2type;
 430 } nfs_type2fmt[] = {
 431         { 0,            NFNON        },
 432         { S_IFREG,      NFREG        },
 433         { S_IFDIR,      NFDIR        },
 434         { S_IFBLK,      NFBLK        },
 435         { S_IFCHR,      NFCHR        },
 436         { S_IFLNK,      NFLNK        },
 437         { S_IFSOCK,     NFSOCK       },
 438         { S_IFIFO,      NFFIFO       },
 439         { 0,            NFNON        },
 440         { 0,            NFNON        },
 441 };
 442
 443 struct compound_hdr {
 444         int32_t         status;
 445         uint32_t        nops;
 446         uint32_t        taglen;
 447         char *          tag;
 448 };
 449
 450 /*
 451  * START OF "GENERIC" ENCODE ROUTINES.
 452  *   These may look a little ugly since they are imported from a "generic"
 453  * set of XDR encode/decode routines which are intended to be shared by
 454  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 455  *
 456  * If the pain of reading these is too great, it should be a straightforward
 457  * task to translate them into Linux-specific versions which are more
 458  * consistent with the style used in NFSv2/v3...
 459  */
 460 #define WRITE32(n)               *p++ = htonl(n)
 461 #define WRITE64(n)               do {                           \
 462         *p++ = htonl((uint32_t)((n) >> 32));                            \
 463         *p++ = htonl((uint32_t)(n));                                    \
 464 } while (0)
 465 #define WRITEMEM(ptr,nbytes)     do {                           \
 466         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 467 } while (0)
 468
 469 #define RESERVE_SPACE(nbytes)   do {                            \
 470         p = xdr_reserve_space(xdr, nbytes);                     \
 471         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 472         BUG_ON(!p);                                             \
 473 } while (0)
 474
 475 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 476 {
 477         __be32 *p;
 478
 479         p = xdr_reserve_space(xdr, 4 + len);
 480         BUG_ON(p == NULL);
 481         xdr_encode_opaque(p, str, len);
 482 }
 483
 484 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 485 {
 486         __be32 *p;
 487
 488         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 489         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 490         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 491         WRITE32(hdr->taglen);
 492         WRITEMEM(hdr->tag, hdr->taglen);
 493         WRITE32(NFS4_MINOR_VERSION);
 494         WRITE32(hdr->nops);
 495         return 0;
 496 }
 497
 498 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 499 {
 500         __be32 *p;
 501
 502         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 503         BUG_ON(p == NULL);
 504         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 505 }
 506
 507 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 508 {
 509         char owner_name[IDMAP_NAMESZ];
 510         char owner_group[IDMAP_NAMESZ];
 511         int owner_namelen = 0;
 512         int owner_grouplen = 0;
 513         __be32 *p;
 514         __be32 *q;
 515         int len;
 516         uint32_t bmval0 = 0;
 517         uint32_t bmval1 = 0;
 518         int status;
 519
 520         /*
 521          * We reserve enough space to write the entire attribute buffer at once.
 522          * In the worst-case, this would be
 523          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 524          *          = 36 bytes, plus any contribution from variable-length fields
 525          *            such as owner/group.
 526          */
 527         len = 16;
 528
 529         /* Sigh */
 530         if (iap->ia_valid & ATTR_SIZE)
 531                 len += 8;
 532         if (iap->ia_valid & ATTR_MODE)
 533                 len += 4;
 534         if (iap->ia_valid & ATTR_UID) {
 535                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 536                 if (owner_namelen < 0) {
 537                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 538                                iap->ia_uid);
 539                         /* XXX */
 540                         strcpy(owner_name, "nobody");
 541                         owner_namelen = sizeof("nobody") - 1;
 542                         /* goto out; */
 543                 }
 544                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 545         }
 546         if (iap->ia_valid & ATTR_GID) {
 547                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 548                 if (owner_grouplen < 0) {
 549                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 550                                iap->ia_gid);
 551                         strcpy(owner_group, "nobody");
 552                         owner_grouplen = sizeof("nobody") - 1;
 553                         /* goto out; */
 554                 }
 555                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 556         }
 557         if (iap->ia_valid & ATTR_ATIME_SET)
 558                 len += 16;
 559         else if (iap->ia_valid & ATTR_ATIME)
 560                 len += 4;
 561         if (iap->ia_valid & ATTR_MTIME_SET)
 562                 len += 16;
 563         else if (iap->ia_valid & ATTR_MTIME)
 564                 len += 4;
 565         RESERVE_SPACE(len);
 566
 567         /*
 568          * We write the bitmap length now, but leave the bitmap and the attribute
 569          * buffer length to be backfilled at the end of this routine.
 570          */
 571         WRITE32(2);
 572         q = p;
 573         p += 3;
 574
 575         if (iap->ia_valid & ATTR_SIZE) {
 576                 bmval0 |= FATTR4_WORD0_SIZE;
 577                 WRITE64(iap->ia_size);
 578         }
 579         if (iap->ia_valid & ATTR_MODE) {
 580                 bmval1 |= FATTR4_WORD1_MODE;
 581                 WRITE32(iap->ia_mode & S_IALLUGO);
 582         }
 583         if (iap->ia_valid & ATTR_UID) {
 584                 bmval1 |= FATTR4_WORD1_OWNER;
 585                 WRITE32(owner_namelen);
 586                 WRITEMEM(owner_name, owner_namelen);
 587         }
 588         if (iap->ia_valid & ATTR_GID) {
 589                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 590                 WRITE32(owner_grouplen);
 591                 WRITEMEM(owner_group, owner_grouplen);
 592         }
 593         if (iap->ia_valid & ATTR_ATIME_SET) {
 594                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 595                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 596                 WRITE32(0);
 597                 WRITE32(iap->ia_mtime.tv_sec);
 598                 WRITE32(iap->ia_mtime.tv_nsec);
 599         }
 600         else if (iap->ia_valid & ATTR_ATIME) {
 601                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 602                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 603         }
 604         if (iap->ia_valid & ATTR_MTIME_SET) {
 605                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 606                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 607                 WRITE32(0);
 608                 WRITE32(iap->ia_mtime.tv_sec);
 609                 WRITE32(iap->ia_mtime.tv_nsec);
 610         }
 611         else if (iap->ia_valid & ATTR_MTIME) {
 612                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 613                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 614         }
 615
 616         /*
 617          * Now we backfill the bitmap and the attribute buffer length.
 618          */
 619         if (len != ((char *)p - (char *)q) + 4) {
 620                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 621                                 len, ((char *)p - (char *)q) + 4);
 622                 BUG();
 623         }
 624         len = (char *)p - (char *)q - 12;
 625         *q++ = htonl(bmval0);
 626         *q++ = htonl(bmval1);
 627         *q++ = htonl(len);
 628
 629         status = 0;
 630 /* out: */
 631         return status;
 632 }
 633
 634 static int encode_access(struct xdr_stream *xdr, u32 access)
 635 {
 636         __be32 *p;
 637
 638         RESERVE_SPACE(8);
 639         WRITE32(OP_ACCESS);
 640         WRITE32(access);
 641
 642         return 0;
 643 }
 644
 645 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 646 {
 647         __be32 *p;
 648
 649         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 650         WRITE32(OP_CLOSE);
 651         WRITE32(arg->seqid->sequence->counter);
 652         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 653
 654         return 0;
 655 }
 656
 657 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 658 {
 659         __be32 *p;
 660
 661         RESERVE_SPACE(16);
 662         WRITE32(OP_COMMIT);
 663         WRITE64(args->offset);
 664         WRITE32(args->count);
 665
 666         return 0;
 667 }
 668
 669 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 670 {
 671         __be32 *p;
 672
 673         RESERVE_SPACE(8);
 674         WRITE32(OP_CREATE);
 675         WRITE32(create->ftype);
 676
 677         switch (create->ftype) {
 678         case NF4LNK:
 679                 RESERVE_SPACE(4);
 680                 WRITE32(create->u.symlink.len);
 681                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 682                 break;
 683
 684         case NF4BLK: case NF4CHR:
 685                 RESERVE_SPACE(8);
 686                 WRITE32(create->u.device.specdata1);
 687                 WRITE32(create->u.device.specdata2);
 688                 break;
 689
 690         default:
 691                 break;
 692         }
 693
 694         RESERVE_SPACE(4 + create->name->len);
 695         WRITE32(create->name->len);
 696         WRITEMEM(create->name->name, create->name->len);
 697
 698         return encode_attrs(xdr, create->attrs, create->server);
 699 }
 700
 701 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 702 {
 703         __be32 *p;
 704
 705         RESERVE_SPACE(12);
 706         WRITE32(OP_GETATTR);
 707         WRITE32(1);
 708         WRITE32(bitmap);
 709         return 0;
 710 }
 711
 712 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 713 {
 714         __be32 *p;
 715
 716         RESERVE_SPACE(16);
 717         WRITE32(OP_GETATTR);
 718         WRITE32(2);
 719         WRITE32(bm0);
 720         WRITE32(bm1);
 721         return 0;
 722 }
 723
 724 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 725 {
 726         return encode_getattr_two(xdr,
 727                         bitmask[0] & nfs4_fattr_bitmap[0],
 728                         bitmask[1] & nfs4_fattr_bitmap[1]);
 729 }
 730
 731 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 732 {
 733         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 734                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 735 }
 736
 737 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 738 {
 739         return encode_getattr_two(xdr,
 740                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 741                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 742 }
 743
 744 static int encode_getfh(struct xdr_stream *xdr)
 745 {
 746         __be32 *p;
 747
 748         RESERVE_SPACE(4);
 749         WRITE32(OP_GETFH);
 750
 751         return 0;
 752 }
 753
 754 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 755 {
 756         __be32 *p;
 757
 758         RESERVE_SPACE(8 + name->len);
 759         WRITE32(OP_LINK);
 760         WRITE32(name->len);
 761         WRITEMEM(name->name, name->len);
 762
 763         return 0;
 764 }
 765
 766 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 767 {
 768         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 769                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 770         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 771 }
 772
 773 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 774 {
 775         if (fl->fl_end == OFFSET_MAX)
 776                 return ~(uint64_t)0;
 777         return fl->fl_end - fl->fl_start + 1;
 778 }
 779
 780 /*
 781  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 782  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 783  */
 784 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 785 {
 786         __be32 *p;
 787
 788         RESERVE_SPACE(32);
 789         WRITE32(OP_LOCK);
 790         WRITE32(nfs4_lock_type(args->fl, args->block));
 791         WRITE32(args->reclaim);
 792         WRITE64(args->fl->fl_start);
 793         WRITE64(nfs4_lock_length(args->fl));
 794         WRITE32(args->new_lock_owner);
 795         if (args->new_lock_owner){
 796                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+20);
 797                 WRITE32(args->open_seqid->sequence->counter);
 798                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 799                 WRITE32(args->lock_seqid->sequence->counter);
 800                 WRITE64(args->lock_owner.clientid);
 801                 WRITE32(4);
 802                 WRITE32(args->lock_owner.id);
 803         }
 804         else {
 805                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 806                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 807                 WRITE32(args->lock_seqid->sequence->counter);
 808         }
 809
 810         return 0;
 811 }
 812
 813 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 814 {
 815         __be32 *p;
 816
 817         RESERVE_SPACE(40);
 818         WRITE32(OP_LOCKT);
 819         WRITE32(nfs4_lock_type(args->fl, 0));
 820         WRITE64(args->fl->fl_start);
 821         WRITE64(nfs4_lock_length(args->fl));
 822         WRITE64(args->lock_owner.clientid);
 823         WRITE32(4);
 824         WRITE32(args->lock_owner.id);
 825
 826         return 0;
 827 }
 828
 829 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 830 {
 831         __be32 *p;
 832
 833         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 834         WRITE32(OP_LOCKU);
 835         WRITE32(nfs4_lock_type(args->fl, 0));
 836         WRITE32(args->seqid->sequence->counter);
 837         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 838         WRITE64(args->fl->fl_start);
 839         WRITE64(nfs4_lock_length(args->fl));
 840
 841         return 0;
 842 }
 843
 844 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 845 {
 846         int len = name->len;
 847         __be32 *p;
 848
 849         RESERVE_SPACE(8 + len);
 850         WRITE32(OP_LOOKUP);
 851         WRITE32(len);
 852         WRITEMEM(name->name, len);
 853
 854         return 0;
 855 }
 856
 857 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 858 {
 859         __be32 *p;
 860
 861         RESERVE_SPACE(8);
 862         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 863                 case FMODE_READ:
 864                         WRITE32(NFS4_SHARE_ACCESS_READ);
 865                         break;
 866                 case FMODE_WRITE:
 867                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 868                         break;
 869                 case FMODE_READ|FMODE_WRITE:
 870                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 871                         break;
 872                 default:
 873                         BUG();
 874         }
 875         WRITE32(0);             /* for linux, share_deny = 0 always */
 876 }
 877
 878 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 879 {
 880         __be32 *p;
 881  /*
 882  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 883  * owner 4 = 32
 884  */
 885         RESERVE_SPACE(8);
 886         WRITE32(OP_OPEN);
 887         WRITE32(arg->seqid->sequence->counter);
 888         encode_share_access(xdr, arg->open_flags);
 889         RESERVE_SPACE(16);
 890         WRITE64(arg->clientid);
 891         WRITE32(4);
 892         WRITE32(arg->id);
 893 }
 894
 895 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 896 {
 897         __be32 *p;
 898
 899         RESERVE_SPACE(4);
 900         switch(arg->open_flags & O_EXCL) {
 901                 case 0:
 902                         WRITE32(NFS4_CREATE_UNCHECKED);
 903                         encode_attrs(xdr, arg->u.attrs, arg->server);
 904                         break;
 905                 default:
 906                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 907                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 908         }
 909 }
 910
 911 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 912 {
 913         __be32 *p;
 914
 915         RESERVE_SPACE(4);
 916         switch (arg->open_flags & O_CREAT) {
 917                 case 0:
 918                         WRITE32(NFS4_OPEN_NOCREATE);
 919                         break;
 920                 default:
 921                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 922                         WRITE32(NFS4_OPEN_CREATE);
 923                         encode_createmode(xdr, arg);
 924         }
 925 }
 926
 927 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 928 {
 929         __be32 *p;
 930
 931         RESERVE_SPACE(4);
 932         switch (delegation_type) {
 933                 case 0:
 934                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 935                         break;
 936                 case FMODE_READ:
 937                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 938                         break;
 939                 case FMODE_WRITE|FMODE_READ:
 940                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 941                         break;
 942                 default:
 943                         BUG();
 944         }
 945 }
 946
 947 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 948 {
 949         __be32 *p;
 950
 951         RESERVE_SPACE(4);
 952         WRITE32(NFS4_OPEN_CLAIM_NULL);
 953         encode_string(xdr, name->len, name->name);
 954 }
 955
 956 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 957 {
 958         __be32 *p;
 959
 960         RESERVE_SPACE(4);
 961         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 962         encode_delegation_type(xdr, type);
 963 }
 964
 965 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 966 {
 967         __be32 *p;
 968
 969         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
 970         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 971         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
 972         encode_string(xdr, name->len, name->name);
 973 }
 974
 975 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 976 {
 977         encode_openhdr(xdr, arg);
 978         encode_opentype(xdr, arg);
 979         switch (arg->claim) {
 980                 case NFS4_OPEN_CLAIM_NULL:
 981                         encode_claim_null(xdr, arg->name);
 982                         break;
 983                 case NFS4_OPEN_CLAIM_PREVIOUS:
 984                         encode_claim_previous(xdr, arg->u.delegation_type);
 985                         break;
 986                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 987                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
 988                         break;
 989                 default:
 990                         BUG();
 991         }
 992         return 0;
 993 }
 994
 995 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
 996 {
 997         __be32 *p;
 998
 999         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1000         WRITE32(OP_OPEN_CONFIRM);
1001         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1002         WRITE32(arg->seqid->sequence->counter);
1003
1004         return 0;
1005 }
1006
1007 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1008 {
1009         __be32 *p;
1010
1011         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1012         WRITE32(OP_OPEN_DOWNGRADE);
1013         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1014         WRITE32(arg->seqid->sequence->counter);
1015         encode_share_access(xdr, arg->open_flags);
1016         return 0;
1017 }
1018
1019 static int
1020 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1021 {
1022         int len = fh->size;
1023         __be32 *p;
1024
1025         RESERVE_SPACE(8 + len);
1026         WRITE32(OP_PUTFH);
1027         WRITE32(len);
1028         WRITEMEM(fh->data, len);
1029
1030         return 0;
1031 }
1032
1033 static int encode_putrootfh(struct xdr_stream *xdr)
1034 {
1035         __be32 *p;
1036
1037         RESERVE_SPACE(4);
1038         WRITE32(OP_PUTROOTFH);
1039
1040         return 0;
1041 }
1042
1043 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1044 {
1045         nfs4_stateid stateid;
1046         __be32 *p;
1047
1048         RESERVE_SPACE(NFS4_STATEID_SIZE);
1049         if (ctx->state != NULL) {
1050                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1051                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1052         } else
1053                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1054 }
1055
1056 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1057 {
1058         __be32 *p;
1059
1060         RESERVE_SPACE(4);
1061         WRITE32(OP_READ);
1062
1063         encode_stateid(xdr, args->context);
1064
1065         RESERVE_SPACE(12);
1066         WRITE64(args->offset);
1067         WRITE32(args->count);
1068
1069         return 0;
1070 }
1071
1072 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1073 {
1074         struct rpc_auth *auth = req->rq_task->tk_auth;
1075         uint32_t attrs[2] = {
1076                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1077                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1078         };
1079         int replen;
1080         __be32 *p;
1081
1082         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1083         WRITE32(OP_READDIR);
1084         WRITE64(readdir->cookie);
1085         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1086         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1087         WRITE32(readdir->count);
1088         WRITE32(2);
1089         /* Switch to mounted_on_fileid if the server supports it */
1090         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1091                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1092         else
1093                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1094         WRITE32(attrs[0] & readdir->bitmask[0]);
1095         WRITE32(attrs[1] & readdir->bitmask[1]);
1096         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1097                         __FUNCTION__,
1098                         (unsigned long long)readdir->cookie,
1099                         ((u32 *)readdir->verifier.data)[0],
1100                         ((u32 *)readdir->verifier.data)[1],
1101                         attrs[0] & readdir->bitmask[0],
1102                         attrs[1] & readdir->bitmask[1]);
1103
1104         /* set up reply kvec
1105          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1106          *      + OP_READDIR + status + verifer(2)  = 9
1107          */
1108         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1109         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1110                          readdir->pgbase, readdir->count);
1111         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1112                         __FUNCTION__, replen, readdir->pages,
1113                         readdir->pgbase, readdir->count);
1114
1115         return 0;
1116 }
1117
1118 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1119 {
1120         struct rpc_auth *auth = req->rq_task->tk_auth;
1121         unsigned int replen;
1122         __be32 *p;
1123
1124         RESERVE_SPACE(4);
1125         WRITE32(OP_READLINK);
1126
1127         /* set up reply kvec
1128          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1129          *      + OP_READLINK + status + string length = 8
1130          */
1131         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1132         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1133                         readlink->pgbase, readlink->pglen);
1134
1135         return 0;
1136 }
1137
1138 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1139 {
1140         __be32 *p;
1141
1142         RESERVE_SPACE(8 + name->len);
1143         WRITE32(OP_REMOVE);
1144         WRITE32(name->len);
1145         WRITEMEM(name->name, name->len);
1146
1147         return 0;
1148 }
1149
1150 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1151 {
1152         __be32 *p;
1153
1154         RESERVE_SPACE(8 + oldname->len);
1155         WRITE32(OP_RENAME);
1156         WRITE32(oldname->len);
1157         WRITEMEM(oldname->name, oldname->len);
1158
1159         RESERVE_SPACE(4 + newname->len);
1160         WRITE32(newname->len);
1161         WRITEMEM(newname->name, newname->len);
1162
1163         return 0;
1164 }
1165
1166 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1167 {
1168         __be32 *p;
1169
1170         RESERVE_SPACE(12);
1171         WRITE32(OP_RENEW);
1172         WRITE64(client_stateid->cl_clientid);
1173
1174         return 0;
1175 }
1176
1177 static int
1178 encode_restorefh(struct xdr_stream *xdr)
1179 {
1180         __be32 *p;
1181
1182         RESERVE_SPACE(4);
1183         WRITE32(OP_RESTOREFH);
1184
1185         return 0;
1186 }
1187
1188 static int
1189 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1190 {
1191         __be32 *p;
1192
1193         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1194         WRITE32(OP_SETATTR);
1195         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1196         RESERVE_SPACE(2*4);
1197         WRITE32(1);
1198         WRITE32(FATTR4_WORD0_ACL);
1199         if (arg->acl_len % 4)
1200                 return -EINVAL;
1201         RESERVE_SPACE(4);
1202         WRITE32(arg->acl_len);
1203         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1204         return 0;
1205 }
1206
1207 static int
1208 encode_savefh(struct xdr_stream *xdr)
1209 {
1210         __be32 *p;
1211
1212         RESERVE_SPACE(4);
1213         WRITE32(OP_SAVEFH);
1214
1215         return 0;
1216 }
1217
1218 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1219 {
1220         int status;
1221         __be32 *p;
1222
1223         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1224         WRITE32(OP_SETATTR);
1225         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1226
1227         if ((status = encode_attrs(xdr, arg->iap, server)))
1228                 return status;
1229
1230         return 0;
1231 }
1232
1233 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1234 {
1235         __be32 *p;
1236
1237         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1238         WRITE32(OP_SETCLIENTID);
1239         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1240
1241         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1242         RESERVE_SPACE(4);
1243         WRITE32(setclientid->sc_prog);
1244         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1245         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1246         RESERVE_SPACE(4);
1247         WRITE32(setclientid->sc_cb_ident);
1248
1249         return 0;
1250 }
1251
1252 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1253 {
1254         __be32 *p;
1255
1256         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1257         WRITE32(OP_SETCLIENTID_CONFIRM);
1258         WRITE64(client_state->cl_clientid);
1259         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1260
1261         return 0;
1262 }
1263
1264 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1265 {
1266         __be32 *p;
1267
1268         RESERVE_SPACE(4);
1269         WRITE32(OP_WRITE);
1270
1271         encode_stateid(xdr, args->context);
1272
1273         RESERVE_SPACE(16);
1274         WRITE64(args->offset);
1275         WRITE32(args->stable);
1276         WRITE32(args->count);
1277
1278         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1279
1280         return 0;
1281 }
1282
1283 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1284 {
1285         __be32 *p;
1286
1287         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1288
1289         WRITE32(OP_DELEGRETURN);
1290         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1291         return 0;
1292
1293 }
1294 /*
1295  * END OF "GENERIC" ENCODE ROUTINES.
1296  */
1297
1298 /*
1299  * Encode an ACCESS request
1300  */
1301 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1302 {
1303         struct xdr_stream xdr;
1304         struct compound_hdr hdr = {
1305                 .nops = 2,
1306         };
1307         int status;
1308
1309         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1310         encode_compound_hdr(&xdr, &hdr);
1311         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1312                 status = encode_access(&xdr, args->access);
1313         return status;
1314 }
1315
1316 /*
1317  * Encode LOOKUP request
1318  */
1319 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1320 {
1321         struct xdr_stream xdr;
1322         struct compound_hdr hdr = {
1323                 .nops = 4,
1324         };
1325         int status;
1326
1327         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1328         encode_compound_hdr(&xdr, &hdr);
1329         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1330                 goto out;
1331         if ((status = encode_lookup(&xdr, args->name)) != 0)
1332                 goto out;
1333         if ((status = encode_getfh(&xdr)) != 0)
1334                 goto out;
1335         status = encode_getfattr(&xdr, args->bitmask);
1336 out:
1337         return status;
1338 }
1339
1340 /*
1341  * Encode LOOKUP_ROOT request
1342  */
1343 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1344 {
1345         struct xdr_stream xdr;
1346         struct compound_hdr hdr = {
1347                 .nops = 3,
1348         };
1349         int status;
1350
1351         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1352         encode_compound_hdr(&xdr, &hdr);
1353         if ((status = encode_putrootfh(&xdr)) != 0)
1354                 goto out;
1355         if ((status = encode_getfh(&xdr)) == 0)
1356                 status = encode_getfattr(&xdr, args->bitmask);
1357 out:
1358         return status;
1359 }
1360
1361 /*
1362  * Encode REMOVE request
1363  */
1364 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
1365 {
1366         struct xdr_stream xdr;
1367         struct compound_hdr hdr = {
1368                 .nops = 3,
1369         };
1370         int status;
1371
1372         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1373         encode_compound_hdr(&xdr, &hdr);
1374         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1375                 goto out;
1376         if ((status = encode_remove(&xdr, args->name)) != 0)
1377                 goto out;
1378         status = encode_getfattr(&xdr, args->bitmask);
1379 out:
1380         return status;
1381 }
1382
1383 /*
1384  * Encode RENAME request
1385  */
1386 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1387 {
1388         struct xdr_stream xdr;
1389         struct compound_hdr hdr = {
1390                 .nops = 7,
1391         };
1392         int status;
1393
1394         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1395         encode_compound_hdr(&xdr, &hdr);
1396         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1397                 goto out;
1398         if ((status = encode_savefh(&xdr)) != 0)
1399                 goto out;
1400         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1401                 goto out;
1402         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1403                 goto out;
1404         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1405                 goto out;
1406         if ((status = encode_restorefh(&xdr)) != 0)
1407                 goto out;
1408         status = encode_getfattr(&xdr, args->bitmask);
1409 out:
1410         return status;
1411 }
1412
1413 /*
1414  * Encode LINK request
1415  */
1416 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1417 {
1418         struct xdr_stream xdr;
1419         struct compound_hdr hdr = {
1420                 .nops = 7,
1421         };
1422         int status;
1423
1424         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1425         encode_compound_hdr(&xdr, &hdr);
1426         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1427                 goto out;
1428         if ((status = encode_savefh(&xdr)) != 0)
1429                 goto out;
1430         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1431                 goto out;
1432         if ((status = encode_link(&xdr, args->name)) != 0)
1433                 goto out;
1434         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1435                 goto out;
1436         if ((status = encode_restorefh(&xdr)) != 0)
1437                 goto out;
1438         status = encode_getfattr(&xdr, args->bitmask);
1439 out:
1440         return status;
1441 }
1442
1443 /*
1444  * Encode CREATE request
1445  */
1446 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1447 {
1448         struct xdr_stream xdr;
1449         struct compound_hdr hdr = {
1450                 .nops = 7,
1451         };
1452         int status;
1453
1454         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1455         encode_compound_hdr(&xdr, &hdr);
1456         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1457                 goto out;
1458         if ((status = encode_savefh(&xdr)) != 0)
1459                 goto out;
1460         if ((status = encode_create(&xdr, args)) != 0)
1461                 goto out;
1462         if ((status = encode_getfh(&xdr)) != 0)
1463                 goto out;
1464         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1465                 goto out;
1466         if ((status = encode_restorefh(&xdr)) != 0)
1467                 goto out;
1468         status = encode_getfattr(&xdr, args->bitmask);
1469 out:
1470         return status;
1471 }
1472
1473 /*
1474  * Encode SYMLINK request
1475  */
1476 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1477 {
1478         return nfs4_xdr_enc_create(req, p, args);
1479 }
1480
1481 /*
1482  * Encode GETATTR request
1483  */
1484 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1485 {
1486         struct xdr_stream xdr;
1487         struct compound_hdr hdr = {
1488                 .nops = 2,
1489         };
1490         int status;
1491
1492         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1493         encode_compound_hdr(&xdr, &hdr);
1494         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1495                 status = encode_getfattr(&xdr, args->bitmask);
1496         return status;
1497 }
1498
1499 /*
1500  * Encode a CLOSE request
1501  */
1502 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1503 {
1504         struct xdr_stream xdr;
1505         struct compound_hdr hdr = {
1506                 .nops   = 3,
1507         };
1508         int status;
1509
1510         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1511         encode_compound_hdr(&xdr, &hdr);
1512         status = encode_putfh(&xdr, args->fh);
1513         if(status)
1514                 goto out;
1515         status = encode_close(&xdr, args);
1516         if (status != 0)
1517                 goto out;
1518         status = encode_getfattr(&xdr, args->bitmask);
1519 out:
1520         return status;
1521 }
1522
1523 /*
1524  * Encode an OPEN request
1525  */
1526 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1527 {
1528         struct xdr_stream xdr;
1529         struct compound_hdr hdr = {
1530                 .nops = 7,
1531         };
1532         int status;
1533
1534         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1535         encode_compound_hdr(&xdr, &hdr);
1536         status = encode_putfh(&xdr, args->fh);
1537         if (status)
1538                 goto out;
1539         status = encode_savefh(&xdr);
1540         if (status)
1541                 goto out;
1542         status = encode_open(&xdr, args);
1543         if (status)
1544                 goto out;
1545         status = encode_getfh(&xdr);
1546         if (status)
1547                 goto out;
1548         status = encode_getfattr(&xdr, args->bitmask);
1549         if (status)
1550                 goto out;
1551         status = encode_restorefh(&xdr);
1552         if (status)
1553                 goto out;
1554         status = encode_getfattr(&xdr, args->bitmask);
1555 out:
1556         return status;
1557 }
1558
1559 /*
1560  * Encode an OPEN_CONFIRM request
1561  */
1562 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1563 {
1564         struct xdr_stream xdr;
1565         struct compound_hdr hdr = {
1566                 .nops   = 2,
1567         };
1568         int status;
1569
1570         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1571         encode_compound_hdr(&xdr, &hdr);
1572         status = encode_putfh(&xdr, args->fh);
1573         if(status)
1574                 goto out;
1575         status = encode_open_confirm(&xdr, args);
1576 out:
1577         return status;
1578 }
1579
1580 /*
1581  * Encode an OPEN request with no attributes.
1582  */
1583 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1584 {
1585         struct xdr_stream xdr;
1586         struct compound_hdr hdr = {
1587                 .nops   = 3,
1588         };
1589         int status;
1590
1591         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1592         encode_compound_hdr(&xdr, &hdr);
1593         status = encode_putfh(&xdr, args->fh);
1594         if (status)
1595                 goto out;
1596         status = encode_open(&xdr, args);
1597         if (status)
1598                 goto out;
1599         status = encode_getfattr(&xdr, args->bitmask);
1600 out:
1601         return status;
1602 }
1603
1604 /*
1605  * Encode an OPEN_DOWNGRADE request
1606  */
1607 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1608 {
1609         struct xdr_stream xdr;
1610         struct compound_hdr hdr = {
1611                 .nops   = 3,
1612         };
1613         int status;
1614
1615         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1616         encode_compound_hdr(&xdr, &hdr);
1617         status = encode_putfh(&xdr, args->fh);
1618         if (status)
1619                 goto out;
1620         status = encode_open_downgrade(&xdr, args);
1621         if (status != 0)
1622                 goto out;
1623         status = encode_getfattr(&xdr, args->bitmask);
1624 out:
1625         return status;
1626 }
1627
1628 /*
1629  * Encode a LOCK request
1630  */
1631 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1632 {
1633         struct xdr_stream xdr;
1634         struct compound_hdr hdr = {
1635                 .nops   = 2,
1636         };
1637         int status;
1638
1639         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1640         encode_compound_hdr(&xdr, &hdr);
1641         status = encode_putfh(&xdr, args->fh);
1642         if(status)
1643                 goto out;
1644         status = encode_lock(&xdr, args);
1645 out:
1646         return status;
1647 }
1648
1649 /*
1650  * Encode a LOCKT request
1651  */
1652 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1653 {
1654         struct xdr_stream xdr;
1655         struct compound_hdr hdr = {
1656                 .nops   = 2,
1657         };
1658         int status;
1659
1660         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1661         encode_compound_hdr(&xdr, &hdr);
1662         status = encode_putfh(&xdr, args->fh);
1663         if(status)
1664                 goto out;
1665         status = encode_lockt(&xdr, args);
1666 out:
1667         return status;
1668 }
1669
1670 /*
1671  * Encode a LOCKU request
1672  */
1673 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1674 {
1675         struct xdr_stream xdr;
1676         struct compound_hdr hdr = {
1677                 .nops   = 2,
1678         };
1679         int status;
1680
1681         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1682         encode_compound_hdr(&xdr, &hdr);
1683         status = encode_putfh(&xdr, args->fh);
1684         if(status)
1685                 goto out;
1686         status = encode_locku(&xdr, args);
1687 out:
1688         return status;
1689 }
1690
1691 /*
1692  * Encode a READLINK request
1693  */
1694 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1695 {
1696         struct xdr_stream xdr;
1697         struct compound_hdr hdr = {
1698                 .nops = 2,
1699         };
1700         int status;
1701
1702         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703         encode_compound_hdr(&xdr, &hdr);
1704         status = encode_putfh(&xdr, args->fh);
1705         if(status)
1706                 goto out;
1707         status = encode_readlink(&xdr, args, req);
1708 out:
1709         return status;
1710 }
1711
1712 /*
1713  * Encode a READDIR request
1714  */
1715 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1716 {
1717         struct xdr_stream xdr;
1718         struct compound_hdr hdr = {
1719                 .nops = 2,
1720         };
1721         int status;
1722
1723         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1724         encode_compound_hdr(&xdr, &hdr);
1725         status = encode_putfh(&xdr, args->fh);
1726         if(status)
1727                 goto out;
1728         status = encode_readdir(&xdr, args, req);
1729 out:
1730         return status;
1731 }
1732
1733 /*
1734  * Encode a READ request
1735  */
1736 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1737 {
1738         struct rpc_auth *auth = req->rq_task->tk_auth;
1739         struct xdr_stream xdr;
1740         struct compound_hdr hdr = {
1741                 .nops = 2,
1742         };
1743         int replen, status;
1744
1745         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746         encode_compound_hdr(&xdr, &hdr);
1747         status = encode_putfh(&xdr, args->fh);
1748         if (status)
1749                 goto out;
1750         status = encode_read(&xdr, args);
1751         if (status)
1752                 goto out;
1753
1754         /* set up reply kvec
1755          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1756          *       + OP_READ + status + eof + datalen = 9
1757          */
1758         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1759         xdr_inline_pages(&req->rq_rcv_buf, replen,
1760                          args->pages, args->pgbase, args->count);
1761 out:
1762         return status;
1763 }
1764
1765 /*
1766  * Encode an SETATTR request
1767  */
1768 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1769
1770 {
1771         struct xdr_stream xdr;
1772         struct compound_hdr hdr = {
1773                 .nops   = 3,
1774         };
1775         int status;
1776
1777         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1778         encode_compound_hdr(&xdr, &hdr);
1779         status = encode_putfh(&xdr, args->fh);
1780         if(status)
1781                 goto out;
1782         status = encode_setattr(&xdr, args, args->server);
1783         if(status)
1784                 goto out;
1785         status = encode_getfattr(&xdr, args->bitmask);
1786 out:
1787         return status;
1788 }
1789
1790 /*
1791  * Encode a GETACL request
1792  */
1793 static int
1794 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1795                 struct nfs_getaclargs *args)
1796 {
1797         struct xdr_stream xdr;
1798         struct rpc_auth *auth = req->rq_task->tk_auth;
1799         struct compound_hdr hdr = {
1800                 .nops   = 2,
1801         };
1802         int replen, status;
1803
1804         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805         encode_compound_hdr(&xdr, &hdr);
1806         status = encode_putfh(&xdr, args->fh);
1807         if (status)
1808                 goto out;
1809         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1810         /* set up reply buffer: */
1811         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1812         xdr_inline_pages(&req->rq_rcv_buf, replen,
1813                 args->acl_pages, args->acl_pgbase, args->acl_len);
1814 out:
1815         return status;
1816 }
1817
1818 /*
1819  * Encode a WRITE request
1820  */
1821 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1822 {
1823         struct xdr_stream xdr;
1824         struct compound_hdr hdr = {
1825                 .nops = 3,
1826         };
1827         int status;
1828
1829         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1830         encode_compound_hdr(&xdr, &hdr);
1831         status = encode_putfh(&xdr, args->fh);
1832         if (status)
1833                 goto out;
1834         status = encode_write(&xdr, args);
1835         if (status)
1836                 goto out;
1837         status = encode_getfattr(&xdr, args->bitmask);
1838 out:
1839         return status;
1840 }
1841
1842 /*
1843  *  a COMMIT request
1844  */
1845 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1846 {
1847         struct xdr_stream xdr;
1848         struct compound_hdr hdr = {
1849                 .nops = 3,
1850         };
1851         int status;
1852
1853         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1854         encode_compound_hdr(&xdr, &hdr);
1855         status = encode_putfh(&xdr, args->fh);
1856         if (status)
1857                 goto out;
1858         status = encode_commit(&xdr, args);
1859         if (status)
1860                 goto out;
1861         status = encode_getfattr(&xdr, args->bitmask);
1862 out:
1863         return status;
1864 }
1865
1866 /*
1867  * FSINFO request
1868  */
1869 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1870 {
1871         struct xdr_stream xdr;
1872         struct compound_hdr hdr = {
1873                 .nops   = 2,
1874         };
1875         int status;
1876
1877         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1878         encode_compound_hdr(&xdr, &hdr);
1879         status = encode_putfh(&xdr, args->fh);
1880         if (!status)
1881                 status = encode_fsinfo(&xdr, args->bitmask);
1882         return status;
1883 }
1884
1885 /*
1886  * a PATHCONF request
1887  */
1888 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1889 {
1890         struct xdr_stream xdr;
1891         struct compound_hdr hdr = {
1892                 .nops = 2,
1893         };
1894         int status;
1895
1896         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1897         encode_compound_hdr(&xdr, &hdr);
1898         status = encode_putfh(&xdr, args->fh);
1899         if (!status)
1900                 status = encode_getattr_one(&xdr,
1901                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1902         return status;
1903 }
1904
1905 /*
1906  * a STATFS request
1907  */
1908 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1909 {
1910         struct xdr_stream xdr;
1911         struct compound_hdr hdr = {
1912                 .nops = 2,
1913         };
1914         int status;
1915
1916         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1917         encode_compound_hdr(&xdr, &hdr);
1918         status = encode_putfh(&xdr, args->fh);
1919         if (status == 0)
1920                 status = encode_getattr_two(&xdr,
1921                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1922                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1923         return status;
1924 }
1925
1926 /*
1927  * GETATTR_BITMAP request
1928  */
1929 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1930 {
1931         struct xdr_stream xdr;
1932         struct compound_hdr hdr = {
1933                 .nops = 2,
1934         };
1935         int status;
1936
1937         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1938         encode_compound_hdr(&xdr, &hdr);
1939         status = encode_putfh(&xdr, fhandle);
1940         if (status == 0)
1941                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1942                                 FATTR4_WORD0_LINK_SUPPORT|
1943                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1944                                 FATTR4_WORD0_ACLSUPPORT);
1945         return status;
1946 }
1947
1948 /*
1949  * a RENEW request
1950  */
1951 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1952 {
1953         struct xdr_stream xdr;
1954         struct compound_hdr hdr = {
1955                 .nops   = 1,
1956         };
1957
1958         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1959         encode_compound_hdr(&xdr, &hdr);
1960         return encode_renew(&xdr, clp);
1961 }
1962
1963 /*
1964  * a SETCLIENTID request
1965  */
1966 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1967 {
1968         struct xdr_stream xdr;
1969         struct compound_hdr hdr = {
1970                 .nops   = 1,
1971         };
1972
1973         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1974         encode_compound_hdr(&xdr, &hdr);
1975         return encode_setclientid(&xdr, sc);
1976 }
1977
1978 /*
1979  * a SETCLIENTID_CONFIRM request
1980  */
1981 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1982 {
1983         struct xdr_stream xdr;
1984         struct compound_hdr hdr = {
1985                 .nops   = 3,
1986         };
1987         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1988         int status;
1989
1990         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1991         encode_compound_hdr(&xdr, &hdr);
1992         status = encode_setclientid_confirm(&xdr, clp);
1993         if (!status)
1994                 status = encode_putrootfh(&xdr);
1995         if (!status)
1996                 status = encode_fsinfo(&xdr, lease_bitmap);
1997         return status;
1998 }
1999
2000 /*
2001  * DELEGRETURN request
2002  */
2003 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2004 {
2005         struct xdr_stream xdr;
2006         struct compound_hdr hdr = {
2007                 .nops = 3,
2008         };
2009         int status;
2010
2011         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2012         encode_compound_hdr(&xdr, &hdr);
2013         status = encode_putfh(&xdr, args->fhandle);
2014         if (status != 0)
2015                 goto out;
2016         status = encode_delegreturn(&xdr, args->stateid);
2017         if (status != 0)
2018                 goto out;
2019         status = encode_getfattr(&xdr, args->bitmask);
2020 out:
2021         return status;
2022 }
2023
2024 /*
2025  * Encode FS_LOCATIONS request
2026  */
2027 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2028 {
2029         struct xdr_stream xdr;
2030         struct compound_hdr hdr = {
2031                 .nops = 3,
2032         };
2033         struct rpc_auth *auth = req->rq_task->tk_auth;
2034         int replen;
2035         int status;
2036
2037         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2038         encode_compound_hdr(&xdr, &hdr);
2039         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2040                 goto out;
2041         if ((status = encode_lookup(&xdr, args->name)) != 0)
2042                 goto out;
2043         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2044                 goto out;
2045         /* set up reply
2046          *   toplevel_status + OP_PUTFH + status
2047          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2048          */
2049         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2050         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2051                         0, PAGE_SIZE);
2052 out:
2053         return status;
2054 }
2055
2056 /*
2057  * START OF "GENERIC" DECODE ROUTINES.
2058  *   These may look a little ugly since they are imported from a "generic"
2059  * set of XDR encode/decode routines which are intended to be shared by
2060  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2061  *
2062  * If the pain of reading these is too great, it should be a straightforward
2063  * task to translate them into Linux-specific versions which are more
2064  * consistent with the style used in NFSv2/v3...
2065  */
2066 #define READ32(x)         (x) = ntohl(*p++)
2067 #define READ64(x)         do {                  \
2068         (x) = (u64)ntohl(*p++) << 32;           \
2069         (x) |= ntohl(*p++);                     \
2070 } while (0)
2071 #define READTIME(x)       do {                  \
2072         p++;                                    \
2073         (x.tv_sec) = ntohl(*p++);               \
2074         (x.tv_nsec) = ntohl(*p++);              \
2075 } while (0)
2076 #define COPYMEM(x,nbytes) do {                  \
2077         memcpy((x), p, nbytes);                 \
2078         p += XDR_QUADLEN(nbytes);               \
2079 } while (0)
2080
2081 #define READ_BUF(nbytes)  do { \
2082         p = xdr_inline_decode(xdr, nbytes); \
2083         if (unlikely(!p)) { \
2084                 printk(KERN_INFO "%s: prematurely hit end of receive" \
2085                                 " buffer\n", __FUNCTION__); \
2086                 printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2087                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2088                 return -EIO; \
2089         } \
2090 } while (0)
2091
2092 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2093 {
2094         __be32 *p;
2095
2096         READ_BUF(4);
2097         READ32(*len);
2098         READ_BUF(*len);
2099         *string = (char *)p;
2100         return 0;
2101 }
2102
2103 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2104 {
2105         __be32 *p;
2106
2107         READ_BUF(8);
2108         READ32(hdr->status);
2109         READ32(hdr->taglen);
2110
2111         READ_BUF(hdr->taglen + 4);
2112         hdr->tag = (char *)p;
2113         p += XDR_QUADLEN(hdr->taglen);
2114         READ32(hdr->nops);
2115         return 0;
2116 }
2117
2118 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2119 {
2120         __be32 *p;
2121         uint32_t opnum;
2122         int32_t nfserr;
2123
2124         READ_BUF(8);
2125         READ32(opnum);
2126         if (opnum != expected) {
2127                 printk(KERN_NOTICE
2128                                 "nfs4_decode_op_hdr: Server returned operation"
2129                                 " %d but we issued a request for %d\n",
2130                                 opnum, expected);
2131                 return -EIO;
2132         }
2133         READ32(nfserr);
2134         if (nfserr != NFS_OK)
2135                 return -nfs4_stat_to_errno(nfserr);
2136         return 0;
2137 }
2138
2139 /* Dummy routine */
2140 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2141 {
2142         __be32 *p;
2143         unsigned int strlen;
2144         char *str;
2145
2146         READ_BUF(12);
2147         return decode_opaque_inline(xdr, &strlen, &str);
2148 }
2149
2150 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2151 {
2152         uint32_t bmlen;
2153         __be32 *p;
2154
2155         READ_BUF(4);
2156         READ32(bmlen);
2157
2158         bitmap[0] = bitmap[1] = 0;
2159         READ_BUF((bmlen << 2));
2160         if (bmlen > 0) {
2161                 READ32(bitmap[0]);
2162                 if (bmlen > 1)
2163                         READ32(bitmap[1]);
2164         }
2165         return 0;
2166 }
2167
2168 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2169 {
2170         __be32 *p;
2171
2172         READ_BUF(4);
2173         READ32(*attrlen);
2174         *savep = xdr->p;
2175         return 0;
2176 }
2177
2178 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2179 {
2180         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2181                 decode_attr_bitmap(xdr, bitmask);
2182                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2183         } else
2184                 bitmask[0] = bitmask[1] = 0;
2185         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2186         return 0;
2187 }
2188
2189 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2190 {
2191         __be32 *p;
2192
2193         *type = 0;
2194         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2195                 return -EIO;
2196         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2197                 READ_BUF(4);
2198                 READ32(*type);
2199                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2200                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2201                         return -EIO;
2202                 }
2203                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2204         }
2205         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2206         return 0;
2207 }
2208
2209 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2210 {
2211         __be32 *p;
2212
2213         *change = 0;
2214         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2215                 return -EIO;
2216         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2217                 READ_BUF(8);
2218                 READ64(*change);
2219                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2220         }
2221         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2222                         (unsigned long long)*change);
2223         return 0;
2224 }
2225
2226 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2227 {
2228         __be32 *p;
2229
2230         *size = 0;
2231         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2232                 return -EIO;
2233         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2234                 READ_BUF(8);
2235                 READ64(*size);
2236                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2237         }
2238         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2239         return 0;
2240 }
2241
2242 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2243 {
2244         __be32 *p;
2245
2246         *res = 0;
2247         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2248                 return -EIO;
2249         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2250                 READ_BUF(4);
2251                 READ32(*res);
2252                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2253         }
2254         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2255         return 0;
2256 }
2257
2258 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2259 {
2260         __be32 *p;
2261
2262         *res = 0;
2263         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2264                 return -EIO;
2265         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2266                 READ_BUF(4);
2267                 READ32(*res);
2268                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2269         }
2270         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2271         return 0;
2272 }
2273
2274 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2275 {
2276         __be32 *p;
2277
2278         fsid->major = 0;
2279         fsid->minor = 0;
2280         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2281                 return -EIO;
2282         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2283                 READ_BUF(16);
2284                 READ64(fsid->major);
2285                 READ64(fsid->minor);
2286                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2287         }
2288         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2289                         (unsigned long long)fsid->major,
2290                         (unsigned long long)fsid->minor);
2291         return 0;
2292 }
2293
2294 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2295 {
2296         __be32 *p;
2297
2298         *res = 60;
2299         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2300                 return -EIO;
2301         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2302                 READ_BUF(4);
2303                 READ32(*res);
2304                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2305         }
2306         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2307         return 0;
2308 }
2309
2310 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2311 {
2312         __be32 *p;
2313
2314         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2315         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2316                 return -EIO;
2317         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2318                 READ_BUF(4);
2319                 READ32(*res);
2320                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2321         }
2322         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2323         return 0;
2324 }
2325
2326 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2327 {
2328         __be32 *p;
2329
2330         *fileid = 0;
2331         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2332                 return -EIO;
2333         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2334                 READ_BUF(8);
2335                 READ64(*fileid);
2336                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2337         }
2338         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2339         return 0;
2340 }
2341
2342 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2343 {
2344         __be32 *p;
2345
2346         *fileid = 0;
2347         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2348                 return -EIO;
2349         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2350                 READ_BUF(8);
2351                 READ64(*fileid);
2352                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2353         }
2354         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2355         return 0;
2356 }
2357
2358 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2359 {
2360         __be32 *p;
2361         int status = 0;
2362
2363         *res = 0;
2364         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2365                 return -EIO;
2366         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2367                 READ_BUF(8);
2368                 READ64(*res);
2369                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2370         }
2371         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2372         return status;
2373 }
2374
2375 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2376 {
2377         __be32 *p;
2378         int status = 0;
2379
2380         *res = 0;
2381         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2382                 return -EIO;
2383         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2384                 READ_BUF(8);
2385                 READ64(*res);
2386                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2387         }
2388         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2389         return status;
2390 }
2391
2392 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2393 {
2394         __be32 *p;
2395         int status = 0;
2396
2397         *res = 0;
2398         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2399                 return -EIO;
2400         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2401                 READ_BUF(8);
2402                 READ64(*res);
2403                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2404         }
2405         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2406         return status;
2407 }
2408
2409 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2410 {
2411         int n;
2412         __be32 *p;
2413         int status = 0;
2414
2415         READ_BUF(4);
2416         READ32(n);
2417         if (n < 0)
2418                 goto out_eio;
2419         if (n == 0)
2420                 goto root_path;
2421         dprintk("path ");
2422         path->ncomponents = 0;
2423         while (path->ncomponents < n) {
2424                 struct nfs4_string *component = &path->components[path->ncomponents];
2425                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2426                 if (unlikely(status != 0))
2427                         goto out_eio;
2428                 if (path->ncomponents != n)
2429                         dprintk("/");
2430                 dprintk("%s", component->data);
2431                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2432                         path->ncomponents++;
2433                 else {
2434                         dprintk("cannot parse %d components in path\n", n);
2435                         goto out_eio;
2436                 }
2437         }
2438 out:
2439         dprintk("\n");
2440         return status;
2441 root_path:
2442 /* a root pathname is sent as a zero component4 */
2443         path->ncomponents = 1;
2444         path->components[0].len=0;
2445         path->components[0].data=NULL;
2446         dprintk("path /\n");
2447         goto out;
2448 out_eio:
2449         dprintk(" status %d", status);
2450         status = -EIO;
2451         goto out;
2452 }
2453
2454 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2455 {
2456         int n;
2457         __be32 *p;
2458         int status = -EIO;
2459
2460         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2461                 goto out;
2462         status = 0;
2463         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2464                 goto out;
2465         dprintk("%s: fsroot ", __FUNCTION__);
2466         status = decode_pathname(xdr, &res->fs_path);
2467         if (unlikely(status != 0))
2468                 goto out;
2469         READ_BUF(4);
2470         READ32(n);
2471         if (n <= 0)
2472                 goto out_eio;
2473         res->nlocations = 0;
2474         while (res->nlocations < n) {
2475                 int m;
2476                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2477
2478                 READ_BUF(4);
2479                 READ32(m);
2480                 if (m <= 0)
2481                         goto out_eio;
2482
2483                 loc->nservers = 0;
2484                 dprintk("%s: servers ", __FUNCTION__);
2485                 while (loc->nservers < m) {
2486                         struct nfs4_string *server = &loc->servers[loc->nservers];
2487                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2488                         if (unlikely(status != 0))
2489                                 goto out_eio;
2490                         dprintk("%s ", server->data);
2491                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2492                                 loc->nservers++;
2493                         else {
2494                                 int i;
2495                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2496                                 for (i = loc->nservers; i < m; i++) {
2497                                         unsigned int len;
2498                                         char *data;
2499                                         status = decode_opaque_inline(xdr, &len, &data);
2500                                         if (unlikely(status != 0))
2501                                                 goto out_eio;
2502                                 }
2503                         }
2504                 }
2505                 status = decode_pathname(xdr, &loc->rootpath);
2506                 if (unlikely(status != 0))
2507                         goto out_eio;
2508                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2509                         res->nlocations++;
2510         }
2511 out:
2512         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2513         return status;
2514 out_eio:
2515         status = -EIO;
2516         goto out;
2517 }
2518
2519 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2520 {
2521         __be32 *p;
2522         int status = 0;
2523
2524         *res = 0;
2525         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2526                 return -EIO;
2527         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2528                 READ_BUF(8);
2529                 READ64(*res);
2530                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2531         }
2532         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2533         return status;
2534 }
2535
2536 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2537 {
2538         __be32 *p;
2539         int status = 0;
2540
2541         *maxlink = 1;
2542         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2543                 return -EIO;
2544         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2545                 READ_BUF(4);
2546                 READ32(*maxlink);
2547                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2548         }
2549         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2550         return status;
2551 }
2552
2553 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2554 {
2555         __be32 *p;
2556         int status = 0;
2557
2558         *maxname = 1024;
2559         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2560                 return -EIO;
2561         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2562                 READ_BUF(4);
2563                 READ32(*maxname);
2564                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2565         }
2566         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2567         return status;
2568 }
2569
2570 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2571 {
2572         __be32 *p;
2573         int status = 0;
2574
2575         *res = 1024;
2576         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2577                 return -EIO;
2578         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2579                 uint64_t maxread;
2580                 READ_BUF(8);
2581                 READ64(maxread);
2582                 if (maxread > 0x7FFFFFFF)
2583                         maxread = 0x7FFFFFFF;
2584                 *res = (uint32_t)maxread;
2585                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2586         }
2587         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2588         return status;
2589 }
2590
2591 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2592 {
2593         __be32 *p;
2594         int status = 0;
2595
2596         *res = 1024;
2597         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2598                 return -EIO;
2599         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2600                 uint64_t maxwrite;
2601                 READ_BUF(8);
2602                 READ64(maxwrite);
2603                 if (maxwrite > 0x7FFFFFFF)
2604                         maxwrite = 0x7FFFFFFF;
2605                 *res = (uint32_t)maxwrite;
2606                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2607         }
2608         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2609         return status;
2610 }
2611
2612 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2613 {
2614         __be32 *p;
2615
2616         *mode = 0;
2617         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2618                 return -EIO;
2619         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2620                 READ_BUF(4);
2621                 READ32(*mode);
2622                 *mode &= ~S_IFMT;
2623                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2624         }
2625         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2626         return 0;
2627 }
2628
2629 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2630 {
2631         __be32 *p;
2632
2633         *nlink = 1;
2634         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2635                 return -EIO;
2636         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2637                 READ_BUF(4);
2638                 READ32(*nlink);
2639                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2640         }
2641         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2642         return 0;
2643 }
2644
2645 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2646 {
2647         uint32_t len;
2648         __be32 *p;
2649
2650         *uid = -2;
2651         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2652                 return -EIO;
2653         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2654                 READ_BUF(4);
2655                 READ32(len);
2656                 READ_BUF(len);
2657                 if (len < XDR_MAX_NETOBJ) {
2658                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2659                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2660                                                 __FUNCTION__);
2661                 } else
2662                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2663                                         __FUNCTION__, len);
2664                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2665         }
2666         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2667         return 0;
2668 }
2669
2670 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2671 {
2672         uint32_t len;
2673         __be32 *p;
2674
2675         *gid = -2;
2676         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2677                 return -EIO;
2678         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2679                 READ_BUF(4);
2680                 READ32(len);
2681                 READ_BUF(len);
2682                 if (len < XDR_MAX_NETOBJ) {
2683                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2684                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2685                                                 __FUNCTION__);
2686                 } else
2687                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2688                                         __FUNCTION__, len);
2689                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2690         }
2691         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2692         return 0;
2693 }
2694
2695 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2696 {
2697         uint32_t major = 0, minor = 0;
2698         __be32 *p;
2699
2700         *rdev = MKDEV(0,0);
2701         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2702                 return -EIO;
2703         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2704                 dev_t tmp;
2705
2706                 READ_BUF(8);
2707                 READ32(major);
2708                 READ32(minor);
2709                 tmp = MKDEV(major, minor);
2710                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2711                         *rdev = tmp;
2712                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2713         }
2714         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2715         return 0;
2716 }
2717
2718 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2719 {
2720         __be32 *p;
2721         int status = 0;
2722
2723         *res = 0;
2724         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2725                 return -EIO;
2726         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2727                 READ_BUF(8);
2728                 READ64(*res);
2729                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2730         }
2731         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2732         return status;
2733 }
2734
2735 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2736 {
2737         __be32 *p;
2738         int status = 0;
2739
2740         *res = 0;
2741         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2742                 return -EIO;
2743         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2744                 READ_BUF(8);
2745                 READ64(*res);
2746                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2747         }
2748         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2749         return status;
2750 }
2751
2752 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2753 {
2754         __be32 *p;
2755         int status = 0;
2756
2757         *res = 0;
2758         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2759                 return -EIO;
2760         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2761                 READ_BUF(8);
2762                 READ64(*res);
2763                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2764         }
2765         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2766         return status;
2767 }
2768
2769 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2770 {
2771         __be32 *p;
2772
2773         *used = 0;
2774         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2775                 return -EIO;
2776         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2777                 READ_BUF(8);
2778                 READ64(*used);
2779                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2780         }
2781         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2782                         (unsigned long long)*used);
2783         return 0;
2784 }
2785
2786 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2787 {
2788         __be32 *p;
2789         uint64_t sec;
2790         uint32_t nsec;
2791
2792         READ_BUF(12);
2793         READ64(sec);
2794         READ32(nsec);
2795         time->tv_sec = (time_t)sec;
2796         time->tv_nsec = (long)nsec;
2797         return 0;
2798 }
2799
2800 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2801 {
2802         int status = 0;
2803
2804         time->tv_sec = 0;
2805         time->tv_nsec = 0;
2806         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2807                 return -EIO;
2808         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2809                 status = decode_attr_time(xdr, time);
2810                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2811         }
2812         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2813         return status;
2814 }
2815
2816 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2817 {
2818         int status = 0;
2819
2820         time->tv_sec = 0;
2821         time->tv_nsec = 0;
2822         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2823                 return -EIO;
2824         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2825                 status = decode_attr_time(xdr, time);
2826                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2827         }
2828         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2829         return status;
2830 }
2831
2832 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2833 {
2834         int status = 0;
2835
2836         time->tv_sec = 0;
2837         time->tv_nsec = 0;
2838         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2839                 return -EIO;
2840         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2841                 status = decode_attr_time(xdr, time);
2842                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2843         }
2844         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2845         return status;
2846 }
2847
2848 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2849 {
2850         unsigned int attrwords = XDR_QUADLEN(attrlen);
2851         unsigned int nwords = xdr->p - savep;
2852
2853         if (unlikely(attrwords != nwords)) {
2854                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2855                                 __FUNCTION__,
2856                                 attrwords << 2,
2857                                 (attrwords < nwords) ? '<' : '>',
2858                                 nwords << 2);
2859                 return -EIO;
2860         }
2861         return 0;
2862 }
2863
2864 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2865 {
2866         __be32 *p;
2867
2868         READ_BUF(20);
2869         READ32(cinfo->atomic);
2870         READ64(cinfo->before);
2871         READ64(cinfo->after);
2872         return 0;
2873 }
2874
2875 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2876 {
2877         __be32 *p;
2878         uint32_t supp, acc;
2879         int status;
2880
2881         status = decode_op_hdr(xdr, OP_ACCESS);
2882         if (status)
2883                 return status;
2884         READ_BUF(8);
2885         READ32(supp);
2886         READ32(acc);
2887         access->supported = supp;
2888         access->access = acc;
2889         return 0;
2890 }
2891
2892 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2893 {
2894         __be32 *p;
2895         int status;
2896
2897         status = decode_op_hdr(xdr, OP_CLOSE);
2898         if (status)
2899                 return status;
2900         READ_BUF(NFS4_STATEID_SIZE);
2901         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2902         return 0;
2903 }
2904
2905 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2906 {
2907         __be32 *p;
2908         int status;
2909
2910         status = decode_op_hdr(xdr, OP_COMMIT);
2911         if (status)
2912                 return status;
2913         READ_BUF(8);
2914         COPYMEM(res->verf->verifier, 8);
2915         return 0;
2916 }
2917
2918 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2919 {
2920         __be32 *p;
2921         uint32_t bmlen;
2922         int status;
2923
2924         status = decode_op_hdr(xdr, OP_CREATE);
2925         if (status)
2926                 return status;
2927         if ((status = decode_change_info(xdr, cinfo)))
2928                 return status;
2929         READ_BUF(4);
2930         READ32(bmlen);
2931         READ_BUF(bmlen << 2);
2932         return 0;
2933 }
2934
2935 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2936 {
2937         __be32 *savep;
2938         uint32_t attrlen,
2939                  bitmap[2] = {0};
2940         int status;
2941
2942         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2943                 goto xdr_error;
2944         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2945                 goto xdr_error;
2946         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2947                 goto xdr_error;
2948         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2949                 goto xdr_error;
2950         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2951                 goto xdr_error;
2952         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2953                 goto xdr_error;
2954         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2955                 goto xdr_error;
2956         status = verify_attr_len(xdr, savep, attrlen);
2957 xdr_error:
2958         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2959         return status;
2960 }
2961
2962 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2963 {
2964         __be32 *savep;
2965         uint32_t attrlen,
2966                  bitmap[2] = {0};
2967         int status;
2968
2969         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2970                 goto xdr_error;
2971         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2972                 goto xdr_error;
2973         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2974                 goto xdr_error;
2975
2976         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2977                 goto xdr_error;
2978         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2979                 goto xdr_error;
2980         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2981                 goto xdr_error;
2982         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2983                 goto xdr_error;
2984         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2985                 goto xdr_error;
2986         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2987                 goto xdr_error;
2988
2989         status = verify_attr_len(xdr, savep, attrlen);
2990 xdr_error:
2991         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2992         return status;
2993 }
2994
2995 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2996 {
2997         __be32 *savep;
2998         uint32_t attrlen,
2999                  bitmap[2] = {0};
3000         int status;
3001
3002         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3003                 goto xdr_error;
3004         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3005                 goto xdr_error;
3006         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3007                 goto xdr_error;
3008
3009         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3010                 goto xdr_error;
3011         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3012                 goto xdr_error;
3013
3014         status = verify_attr_len(xdr, savep, attrlen);
3015 xdr_error:
3016         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3017         return status;
3018 }
3019
3020 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3021 {
3022         __be32 *savep;
3023         uint32_t attrlen,
3024                  bitmap[2] = {0},
3025                  type;
3026         int status, fmode = 0;
3027         uint64_t fileid;
3028
3029         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3030                 goto xdr_error;
3031         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3032                 goto xdr_error;
3033
3034         fattr->bitmap[0] = bitmap[0];
3035         fattr->bitmap[1] = bitmap[1];
3036
3037         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3038                 goto xdr_error;
3039
3040
3041         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3042                 goto xdr_error;
3043         fattr->type = nfs_type2fmt[type].nfs2type;
3044         fmode = nfs_type2fmt[type].mode;
3045
3046         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3047                 goto xdr_error;
3048         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3049                 goto xdr_error;
3050         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3051                 goto xdr_error;
3052         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3053                 goto xdr_error;
3054         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3055                                                 struct nfs4_fs_locations,
3056                                                 fattr))) != 0)
3057                 goto xdr_error;
3058         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3059                 goto xdr_error;
3060         fattr->mode |= fmode;
3061         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3062                 goto xdr_error;
3063         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3064                 goto xdr_error;
3065         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3066                 goto xdr_error;
3067         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3068                 goto xdr_error;
3069         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3070                 goto xdr_error;
3071         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3072                 goto xdr_error;
3073         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3074                 goto xdr_error;
3075         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3076                 goto xdr_error;
3077         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3078                 goto xdr_error;
3079         if (fattr->fileid == 0 && fileid != 0)
3080                 fattr->fileid = fileid;
3081         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3082                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3083 xdr_error:
3084         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3085         return status;
3086 }
3087
3088
3089 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3090 {
3091         __be32 *savep;
3092         uint32_t attrlen, bitmap[2];
3093         int status;
3094
3095         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3096                 goto xdr_error;
3097         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3098                 goto xdr_error;
3099         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3100                 goto xdr_error;
3101
3102         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3103
3104         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3105                 goto xdr_error;
3106         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3107                 goto xdr_error;
3108         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3109                 goto xdr_error;
3110         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3111         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3112                 goto xdr_error;
3113         fsinfo->wtpref = fsinfo->wtmax;
3114
3115         status = verify_attr_len(xdr, savep, attrlen);
3116 xdr_error:
3117         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3118         return status;
3119 }
3120
3121 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3122 {
3123         __be32 *p;
3124         uint32_t len;
3125         int status;
3126
3127         status = decode_op_hdr(xdr, OP_GETFH);
3128         if (status)
3129                 return status;
3130         /* Zero handle first to allow comparisons */
3131         memset(fh, 0, sizeof(*fh));
3132
3133         READ_BUF(4);
3134         READ32(len);
3135         if (len > NFS4_FHSIZE)
3136                 return -EIO;
3137         fh->size = len;
3138         READ_BUF(len);
3139         COPYMEM(fh->data, len);
3140         return 0;
3141 }
3142
3143 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3144 {
3145         int status;
3146
3147         status = decode_op_hdr(xdr, OP_LINK);
3148         if (status)
3149                 return status;
3150         return decode_change_info(xdr, cinfo);
3151 }
3152
3153 /*
3154  * We create the owner, so we know a proper owner.id length is 4.
3155  */
3156 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3157 {
3158         uint64_t offset, length, clientid;
3159         __be32 *p;
3160         uint32_t namelen, type;
3161
3162         READ_BUF(32);
3163         READ64(offset);
3164         READ64(length);
3165         READ32(type);
3166         if (fl != NULL) {
3167                 fl->fl_start = (loff_t)offset;
3168                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3169                 if (length == ~(uint64_t)0)
3170                         fl->fl_end = OFFSET_MAX;
3171                 fl->fl_type = F_WRLCK;
3172                 if (type & 1)
3173                         fl->fl_type = F_RDLCK;
3174                 fl->fl_pid = 0;
3175         }
3176         READ64(clientid);
3177         READ32(namelen);
3178         READ_BUF(namelen);
3179         return -NFS4ERR_DENIED;
3180 }
3181
3182 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3183 {
3184         __be32 *p;
3185         int status;
3186
3187         status = decode_op_hdr(xdr, OP_LOCK);
3188         if (status == 0) {
3189                 READ_BUF(NFS4_STATEID_SIZE);
3190                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3191         } else if (status == -NFS4ERR_DENIED)
3192                 return decode_lock_denied(xdr, NULL);
3193         return status;
3194 }
3195
3196 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3197 {
3198         int status;
3199         status = decode_op_hdr(xdr, OP_LOCKT);
3200         if (status == -NFS4ERR_DENIED)
3201                 return decode_lock_denied(xdr, res->denied);
3202         return status;
3203 }
3204
3205 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3206 {
3207         __be32 *p;
3208         int status;
3209
3210         status = decode_op_hdr(xdr, OP_LOCKU);
3211         if (status == 0) {
3212                 READ_BUF(NFS4_STATEID_SIZE);
3213                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3214         }
3215         return status;
3216 }
3217
3218 static int decode_lookup(struct xdr_stream *xdr)
3219 {
3220         return decode_op_hdr(xdr, OP_LOOKUP);
3221 }
3222
3223 /* This is too sick! */
3224 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3225 {
3226         __be32 *p;
3227         uint32_t limit_type, nblocks, blocksize;
3228
3229         READ_BUF(12);
3230         READ32(limit_type);
3231         switch (limit_type) {
3232                 case 1:
3233                         READ64(*maxsize);
3234                         break;
3235                 case 2:
3236                         READ32(nblocks);
3237                         READ32(blocksize);
3238                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3239         }
3240         return 0;
3241 }
3242
3243 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3244 {
3245         __be32 *p;
3246         uint32_t delegation_type;
3247
3248         READ_BUF(4);
3249         READ32(delegation_type);
3250         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3251                 res->delegation_type = 0;
3252                 return 0;
3253         }
3254         READ_BUF(NFS4_STATEID_SIZE+4);
3255         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3256         READ32(res->do_recall);
3257         switch (delegation_type) {
3258                 case NFS4_OPEN_DELEGATE_READ:
3259                         res->delegation_type = FMODE_READ;
3260                         break;
3261                 case NFS4_OPEN_DELEGATE_WRITE:
3262                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3263                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3264                                 return -EIO;
3265         }
3266         return decode_ace(xdr, NULL, res->server->nfs_client);
3267 }
3268
3269 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3270 {
3271         __be32 *p;
3272         uint32_t savewords, bmlen, i;
3273         int status;
3274
3275         status = decode_op_hdr(xdr, OP_OPEN);
3276         if (status)
3277                 return status;
3278         READ_BUF(NFS4_STATEID_SIZE);
3279         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3280
3281         decode_change_info(xdr, &res->cinfo);
3282
3283         READ_BUF(8);
3284         READ32(res->rflags);
3285         READ32(bmlen);
3286         if (bmlen > 10)
3287                 goto xdr_error;
3288
3289         READ_BUF(bmlen << 2);
3290         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3291         for (i = 0; i < savewords; ++i)
3292                 READ32(res->attrset[i]);
3293         for (; i < NFS4_BITMAP_SIZE; i++)
3294                 res->attrset[i] = 0;
3295
3296         return decode_delegation(xdr, res);
3297 xdr_error:
3298         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3299         return -EIO;
3300 }
3301
3302 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3303 {
3304         __be32 *p;
3305         int status;
3306
3307         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3308         if (status)
3309                 return status;
3310         READ_BUF(NFS4_STATEID_SIZE);
3311         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3312         return 0;
3313 }
3314
3315 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3316 {
3317         __be32 *p;
3318         int status;
3319
3320         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3321         if (status)
3322                 return status;
3323         READ_BUF(NFS4_STATEID_SIZE);
3324         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3325         return 0;
3326 }
3327
3328 static int decode_putfh(struct xdr_stream *xdr)
3329 {
3330         return decode_op_hdr(xdr, OP_PUTFH);
3331 }
3332
3333 static int decode_putrootfh(struct xdr_stream *xdr)
3334 {
3335         return decode_op_hdr(xdr, OP_PUTROOTFH);
3336 }
3337
3338 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3339 {
3340         struct kvec *iov = req->rq_rcv_buf.head;
3341         __be32 *p;
3342         uint32_t count, eof, recvd, hdrlen;
3343         int status;
3344
3345         status = decode_op_hdr(xdr, OP_READ);
3346         if (status)
3347                 return status;
3348         READ_BUF(8);
3349         READ32(eof);
3350         READ32(count);
3351         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3352         recvd = req->rq_rcv_buf.len - hdrlen;
3353         if (count > recvd) {
3354                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3355                                 "count %u > recvd %u\n", count, recvd);
3356                 count = recvd;
3357                 eof = 0;
3358         }
3359         xdr_read_pages(xdr, count);
3360         res->eof = eof;
3361         res->count = count;
3362         return 0;
3363 }
3364
3365 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3366 {
3367         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3368         struct page     *page = *rcvbuf->pages;
3369         struct kvec     *iov = rcvbuf->head;
3370         unsigned int    nr, pglen = rcvbuf->page_len;
3371         __be32          *end, *entry, *p, *kaddr;
3372         uint32_t        len, attrlen, xlen;
3373         int             hdrlen, recvd, status;
3374
3375         status = decode_op_hdr(xdr, OP_READDIR);
3376         if (status)
3377                 return status;
3378         READ_BUF(8);
3379         COPYMEM(readdir->verifier.data, 8);
3380         dprintk("%s: verifier = 0x%x%x\n",
3381                         __FUNCTION__,
3382                         ((u32 *)readdir->verifier.data)[0],
3383                         ((u32 *)readdir->verifier.data)[1]);
3384
3385
3386         hdrlen = (char *) p - (char *) iov->iov_base;
3387         recvd = rcvbuf->len - hdrlen;
3388         if (pglen > recvd)
3389                 pglen = recvd;
3390         xdr_read_pages(xdr, pglen);
3391
3392         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3393         kaddr = p = kmap_atomic(page, KM_USER0);
3394         end = p + ((pglen + readdir->pgbase) >> 2);
3395         entry = p;
3396         for (nr = 0; *p++; nr++) {
3397                 if (end - p < 3)
3398                         goto short_pkt;
3399                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3400                 p += 2;                 /* cookie */
3401                 len = ntohl(*p++);      /* filename length */
3402                 if (len > NFS4_MAXNAMLEN) {
3403                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3404                         goto err_unmap;
3405                 }
3406                 xlen = XDR_QUADLEN(len);
3407                 if (end - p < xlen + 1)
3408                         goto short_pkt;
3409                 dprintk("filename = %*s\n", len, (char *)p);
3410                 p += xlen;
3411                 len = ntohl(*p++);      /* bitmap length */
3412                 if (end - p < len + 1)
3413                         goto short_pkt;
3414                 p += len;
3415                 attrlen = XDR_QUADLEN(ntohl(*p++));
3416                 if (end - p < attrlen + 2)
3417                         goto short_pkt;
3418                 p += attrlen;           /* attributes */
3419                 entry = p;
3420         }
3421         if (!nr && (entry[0] != 0 || entry[1] == 0))
3422                 goto short_pkt;
3423 out:
3424         kunmap_atomic(kaddr, KM_USER0);
3425         return 0;
3426 short_pkt:
3427         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3428         entry[0] = entry[1] = 0;
3429         /* truncate listing ? */
3430         if (!nr) {
3431                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3432                 entry[1] = 1;
3433         }
3434         goto out;
3435 err_unmap:
3436         kunmap_atomic(kaddr, KM_USER0);
3437         return -errno_NFSERR_IO;
3438 }
3439
3440 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3441 {
3442         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3443         struct kvec *iov = rcvbuf->head;
3444         int hdrlen, len, recvd;
3445         __be32 *p;
3446         char *kaddr;
3447         int status;
3448
3449         status = decode_op_hdr(xdr, OP_READLINK);
3450         if (status)
3451                 return status;
3452
3453         /* Convert length of symlink */
3454         READ_BUF(4);
3455         READ32(len);
3456         if (len >= rcvbuf->page_len || len <= 0) {
3457                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3458                 return -ENAMETOOLONG;
3459         }
3460         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3461         recvd = req->rq_rcv_buf.len - hdrlen;
3462         if (recvd < len) {
3463                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3464                                 "count %u > recvd %u\n", len, recvd);
3465                 return -EIO;
3466         }
3467         xdr_read_pages(xdr, len);
3468         /*
3469          * The XDR encode routine has set things up so that
3470          * the link text will be copied directly into the
3471          * buffer.  We just have to do overflow-checking,
3472          * and and null-terminate the text (the VFS expects
3473          * null-termination).
3474          */
3475         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3476         kaddr[len+rcvbuf->page_base] = '\0';
3477         kunmap_atomic(kaddr, KM_USER0);
3478         return 0;
3479 }
3480
3481 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3482 {
3483         int status;
3484
3485         status = decode_op_hdr(xdr, OP_REMOVE);
3486         if (status)
3487                 goto out;
3488         status = decode_change_info(xdr, cinfo);
3489 out:
3490         return status;
3491 }
3492
3493 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3494               struct nfs4_change_info *new_cinfo)
3495 {
3496         int status;
3497
3498         status = decode_op_hdr(xdr, OP_RENAME);
3499         if (status)
3500                 goto out;
3501         if ((status = decode_change_info(xdr, old_cinfo)))
3502                 goto out;
3503         status = decode_change_info(xdr, new_cinfo);
3504 out:
3505         return status;
3506 }
3507
3508 static int decode_renew(struct xdr_stream *xdr)
3509 {
3510         return decode_op_hdr(xdr, OP_RENEW);
3511 }
3512
3513 static int
3514 decode_restorefh(struct xdr_stream *xdr)
3515 {
3516         return decode_op_hdr(xdr, OP_RESTOREFH);
3517 }
3518
3519 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3520                 size_t *acl_len)
3521 {
3522         __be32 *savep;
3523         uint32_t attrlen,
3524                  bitmap[2] = {0};
3525         struct kvec *iov = req->rq_rcv_buf.head;
3526         int status;
3527
3528         *acl_len = 0;
3529         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3530                 goto out;
3531         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3532                 goto out;
3533         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3534                 goto out;
3535
3536         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3537                 return -EIO;
3538         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3539                 int hdrlen, recvd;
3540
3541                 /* We ignore &savep and don't do consistency checks on
3542                  * the attr length.  Let userspace figure it out.... */
3543                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3544                 recvd = req->rq_rcv_buf.len - hdrlen;
3545                 if (attrlen > recvd) {
3546                         printk(KERN_WARNING "NFS: server cheating in getattr"
3547                                         " acl reply: attrlen %u > recvd %u\n",
3548                                         attrlen, recvd);
3549                         return -EINVAL;
3550                 }
3551                 xdr_read_pages(xdr, attrlen);
3552                 *acl_len = attrlen;
3553         } else
3554                 status = -EOPNOTSUPP;
3555
3556 out:
3557         return status;
3558 }
3559
3560 static int
3561 decode_savefh(struct xdr_stream *xdr)
3562 {
3563         return decode_op_hdr(xdr, OP_SAVEFH);
3564 }
3565
3566 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3567 {
3568         __be32 *p;
3569         uint32_t bmlen;
3570         int status;
3571
3572
3573         status = decode_op_hdr(xdr, OP_SETATTR);
3574         if (status)
3575                 return status;
3576         READ_BUF(4);
3577         READ32(bmlen);
3578         READ_BUF(bmlen << 2);
3579         return 0;
3580 }
3581
3582 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3583 {
3584         __be32 *p;
3585         uint32_t opnum;
3586         int32_t nfserr;
3587
3588         READ_BUF(8);
3589         READ32(opnum);
3590         if (opnum != OP_SETCLIENTID) {
3591                 printk(KERN_NOTICE
3592                                 "nfs4_decode_setclientid: Server returned operation"
3593                                 " %d\n", opnum);
3594                 return -EIO;
3595         }
3596         READ32(nfserr);
3597         if (nfserr == NFS_OK) {
3598                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3599                 READ64(clp->cl_clientid);
3600                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3601         } else if (nfserr == NFSERR_CLID_INUSE) {
3602                 uint32_t len;
3603
3604                 /* skip netid string */
3605                 READ_BUF(4);
3606                 READ32(len);
3607                 READ_BUF(len);
3608
3609                 /* skip uaddr string */
3610                 READ_BUF(4);
3611                 READ32(len);
3612                 READ_BUF(len);
3613                 return -NFSERR_CLID_INUSE;
3614         } else
3615                 return -nfs4_stat_to_errno(nfserr);
3616
3617         return 0;
3618 }
3619
3620 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3621 {
3622         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3623 }
3624
3625 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3626 {
3627         __be32 *p;
3628         int status;
3629
3630         status = decode_op_hdr(xdr, OP_WRITE);
3631         if (status)
3632                 return status;
3633
3634         READ_BUF(16);
3635         READ32(res->count);
3636         READ32(res->verf->committed);
3637         COPYMEM(res->verf->verifier, 8);
3638         return 0;
3639 }
3640
3641 static int decode_delegreturn(struct xdr_stream *xdr)
3642 {
3643         return decode_op_hdr(xdr, OP_DELEGRETURN);
3644 }
3645
3646 /*
3647  * Decode OPEN_DOWNGRADE response
3648  */
3649 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3650 {
3651         struct xdr_stream xdr;
3652         struct compound_hdr hdr;
3653         int status;
3654
3655         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3656         status = decode_compound_hdr(&xdr, &hdr);
3657         if (status)
3658                 goto out;
3659         status = decode_putfh(&xdr);
3660         if (status)
3661                 goto out;
3662         status = decode_open_downgrade(&xdr, res);
3663         if (status != 0)
3664                 goto out;
3665         decode_getfattr(&xdr, res->fattr, res->server);
3666 out:
3667         return status;
3668 }
3669
3670 /*
3671  * END OF "GENERIC" DECODE ROUTINES.
3672  */
3673
3674 /*
3675  * Decode ACCESS response
3676  */
3677 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3678 {
3679         struct xdr_stream xdr;
3680         struct compound_hdr hdr;
3681         int status;
3682
3683         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3684         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3685                 goto out;
3686         if ((status = decode_putfh(&xdr)) == 0)
3687                 status = decode_access(&xdr, res);
3688 out:
3689         return status;
3690 }
3691
3692 /*
3693  * Decode LOOKUP response
3694  */
3695 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3696 {
3697         struct xdr_stream xdr;
3698         struct compound_hdr hdr;
3699         int status;
3700
3701         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3702         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3703                 goto out;
3704         if ((status = decode_putfh(&xdr)) != 0)
3705                 goto out;
3706         if ((status = decode_lookup(&xdr)) != 0)
3707                 goto out;
3708         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3709                 goto out;
3710         status = decode_getfattr(&xdr, res->fattr, res->server);
3711 out:
3712         return status;
3713 }
3714
3715 /*
3716  * Decode LOOKUP_ROOT response
3717  */
3718 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3719 {
3720         struct xdr_stream xdr;
3721         struct compound_hdr hdr;
3722         int status;
3723
3724         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3725         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3726                 goto out;
3727         if ((status = decode_putrootfh(&xdr)) != 0)
3728                 goto out;
3729         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3730                 status = decode_getfattr(&xdr, res->fattr, res->server);
3731 out:
3732         return status;
3733 }
3734
3735 /*
3736  * Decode REMOVE response
3737  */
3738 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
3739 {
3740         struct xdr_stream xdr;
3741         struct compound_hdr hdr;
3742         int status;
3743
3744         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3745         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3746                 goto out;
3747         if ((status = decode_putfh(&xdr)) != 0)
3748                 goto out;
3749         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3750                 goto out;
3751         decode_getfattr(&xdr, res->dir_attr, res->server);
3752 out:
3753         return status;
3754 }
3755
3756 /*
3757  * Decode RENAME response
3758  */
3759 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3760 {
3761         struct xdr_stream xdr;
3762         struct compound_hdr hdr;
3763         int status;
3764
3765         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3766         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3767                 goto out;
3768         if ((status = decode_putfh(&xdr)) != 0)
3769                 goto out;
3770         if ((status = decode_savefh(&xdr)) != 0)
3771                 goto out;
3772         if ((status = decode_putfh(&xdr)) != 0)
3773                 goto out;
3774         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3775                 goto out;
3776         /* Current FH is target directory */
3777         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3778                 goto out;
3779         if ((status = decode_restorefh(&xdr)) != 0)
3780                 goto out;
3781         decode_getfattr(&xdr, res->old_fattr, res->server);
3782 out:
3783         return status;
3784 }
3785
3786 /*
3787  * Decode LINK response
3788  */
3789 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *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         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3797                 goto out;
3798         if ((status = decode_putfh(&xdr)) != 0)
3799                 goto out;
3800         if ((status = decode_savefh(&xdr)) != 0)
3801                 goto out;
3802         if ((status = decode_putfh(&xdr)) != 0)
3803                 goto out;
3804         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3805                 goto out;
3806         /*
3807          * Note order: OP_LINK leaves the directory as the current
3808          *             filehandle.
3809          */
3810         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3811                 goto out;
3812         if ((status = decode_restorefh(&xdr)) != 0)
3813                 goto out;
3814         decode_getfattr(&xdr, res->fattr, res->server);
3815 out:
3816         return status;
3817 }
3818
3819 /*
3820  * Decode CREATE response
3821  */
3822 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3823 {
3824         struct xdr_stream xdr;
3825         struct compound_hdr hdr;
3826         int status;
3827
3828         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3829         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3830                 goto out;
3831         if ((status = decode_putfh(&xdr)) != 0)
3832                 goto out;
3833         if ((status = decode_savefh(&xdr)) != 0)
3834                 goto out;
3835         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3836                 goto out;
3837         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3838                 goto out;
3839         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3840                 goto out;
3841         if ((status = decode_restorefh(&xdr)) != 0)
3842                 goto out;
3843         decode_getfattr(&xdr, res->dir_fattr, res->server);
3844 out:
3845         return status;
3846 }
3847
3848 /*
3849  * Decode SYMLINK response
3850  */
3851 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3852 {
3853         return nfs4_xdr_dec_create(rqstp, p, res);
3854 }
3855
3856 /*
3857  * Decode GETATTR response
3858  */
3859 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3860 {
3861         struct xdr_stream xdr;
3862         struct compound_hdr hdr;
3863         int status;
3864
3865         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3866         status = decode_compound_hdr(&xdr, &hdr);
3867         if (status)
3868                 goto out;
3869         status = decode_putfh(&xdr);
3870         if (status)
3871                 goto out;
3872         status = decode_getfattr(&xdr, res->fattr, res->server);
3873 out:
3874         return status;
3875
3876 }
3877
3878 /*
3879  * Encode an SETACL request
3880  */
3881 static int
3882 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3883 {
3884         struct xdr_stream xdr;
3885         struct compound_hdr hdr = {
3886                 .nops   = 2,
3887         };
3888         int status;
3889
3890         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3891         encode_compound_hdr(&xdr, &hdr);
3892         status = encode_putfh(&xdr, args->fh);
3893         if (status)
3894                 goto out;
3895         status = encode_setacl(&xdr, args);
3896 out:
3897         return status;
3898 }
3899 /*
3900  * Decode SETACL response
3901  */
3902 static int
3903 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3904 {
3905         struct xdr_stream xdr;
3906         struct compound_hdr hdr;
3907         int status;
3908
3909         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3910         status = decode_compound_hdr(&xdr, &hdr);
3911         if (status)
3912                 goto out;
3913         status = decode_putfh(&xdr);
3914         if (status)
3915                 goto out;
3916         status = decode_setattr(&xdr, res);
3917 out:
3918         return status;
3919 }
3920
3921 /*
3922  * Decode GETACL response
3923  */
3924 static int
3925 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3926 {
3927         struct xdr_stream xdr;
3928         struct compound_hdr hdr;
3929         int status;
3930
3931         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3932         status = decode_compound_hdr(&xdr, &hdr);
3933         if (status)
3934                 goto out;
3935         status = decode_putfh(&xdr);
3936         if (status)
3937                 goto out;
3938         status = decode_getacl(&xdr, rqstp, acl_len);
3939
3940 out:
3941         return status;
3942 }
3943
3944 /*
3945  * Decode CLOSE response
3946  */
3947 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3948 {
3949         struct xdr_stream xdr;
3950         struct compound_hdr hdr;
3951         int status;
3952
3953         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3954         status = decode_compound_hdr(&xdr, &hdr);
3955         if (status)
3956                 goto out;
3957         status = decode_putfh(&xdr);
3958         if (status)
3959                 goto out;
3960         status = decode_close(&xdr, res);
3961         if (status != 0)
3962                 goto out;
3963         /*
3964          * Note: Server may do delete on close for this file
3965          *      in which case the getattr call will fail with
3966          *      an ESTALE error. Shouldn't be a problem,
3967          *      though, since fattr->valid will remain unset.
3968          */
3969         decode_getfattr(&xdr, res->fattr, res->server);
3970 out:
3971         return status;
3972 }
3973
3974 /*
3975  * Decode OPEN response
3976  */
3977 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
3978 {
3979         struct xdr_stream xdr;
3980         struct compound_hdr hdr;
3981         int status;
3982
3983         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3984         status = decode_compound_hdr(&xdr, &hdr);
3985         if (status)
3986                 goto out;
3987         status = decode_putfh(&xdr);
3988         if (status)
3989                 goto out;
3990         status = decode_savefh(&xdr);
3991         if (status)
3992                 goto out;
3993         status = decode_open(&xdr, res);
3994         if (status)
3995                 goto out;
3996         status = decode_getfh(&xdr, &res->fh);
3997         if (status)
3998                 goto out;
3999         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4000                 goto out;
4001         if ((status = decode_restorefh(&xdr)) != 0)
4002                 goto out;
4003         decode_getfattr(&xdr, res->dir_attr, res->server);
4004 out:
4005         return status;
4006 }
4007
4008 /*
4009  * Decode OPEN_CONFIRM response
4010  */
4011 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4012 {
4013         struct xdr_stream xdr;
4014         struct compound_hdr hdr;
4015         int status;
4016
4017         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4018         status = decode_compound_hdr(&xdr, &hdr);
4019         if (status)
4020                 goto out;
4021         status = decode_putfh(&xdr);
4022         if (status)
4023                 goto out;
4024         status = decode_open_confirm(&xdr, res);
4025 out:
4026         return status;
4027 }
4028
4029 /*
4030  * Decode OPEN response
4031  */
4032 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4033 {
4034         struct xdr_stream xdr;
4035         struct compound_hdr hdr;
4036         int status;
4037
4038         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4039         status = decode_compound_hdr(&xdr, &hdr);
4040         if (status)
4041                 goto out;
4042         status = decode_putfh(&xdr);
4043         if (status)
4044                 goto out;
4045         status = decode_open(&xdr, res);
4046         if (status)
4047                 goto out;
4048         decode_getfattr(&xdr, res->f_attr, res->server);
4049 out:
4050         return status;
4051 }
4052
4053 /*
4054  * Decode SETATTR response
4055  */
4056 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4057 {
4058         struct xdr_stream xdr;
4059         struct compound_hdr hdr;
4060         int status;
4061
4062         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4063         status = decode_compound_hdr(&xdr, &hdr);
4064         if (status)
4065                 goto out;
4066         status = decode_putfh(&xdr);
4067         if (status)
4068                 goto out;
4069         status = decode_setattr(&xdr, res);
4070         if (status)
4071                 goto out;
4072         status = decode_getfattr(&xdr, res->fattr, res->server);
4073         if (status == NFS4ERR_DELAY)
4074                 status = 0;
4075 out:
4076         return status;
4077 }
4078
4079 /*
4080  * Decode LOCK response
4081  */
4082 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4083 {
4084         struct xdr_stream xdr;
4085         struct compound_hdr hdr;
4086         int status;
4087
4088         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4089         status = decode_compound_hdr(&xdr, &hdr);
4090         if (status)
4091                 goto out;
4092         status = decode_putfh(&xdr);
4093         if (status)
4094                 goto out;
4095         status = decode_lock(&xdr, res);
4096 out:
4097         return status;
4098 }
4099
4100 /*
4101  * Decode LOCKT response
4102  */
4103 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4104 {
4105         struct xdr_stream xdr;
4106         struct compound_hdr hdr;
4107         int status;
4108
4109         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4110         status = decode_compound_hdr(&xdr, &hdr);
4111         if (status)
4112                 goto out;
4113         status = decode_putfh(&xdr);
4114         if (status)
4115                 goto out;
4116         status = decode_lockt(&xdr, res);
4117 out:
4118         return status;
4119 }
4120
4121 /*
4122  * Decode LOCKU response
4123  */
4124 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4125 {
4126         struct xdr_stream xdr;
4127         struct compound_hdr hdr;
4128         int status;
4129
4130         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4131         status = decode_compound_hdr(&xdr, &hdr);
4132         if (status)
4133                 goto out;
4134         status = decode_putfh(&xdr);
4135         if (status)
4136                 goto out;
4137         status = decode_locku(&xdr, res);
4138 out:
4139         return status;
4140 }
4141
4142 /*
4143  * Decode READLINK response
4144  */
4145 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4146 {
4147         struct xdr_stream xdr;
4148         struct compound_hdr hdr;
4149         int status;
4150
4151         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4152         status = decode_compound_hdr(&xdr, &hdr);
4153         if (status)
4154                 goto out;
4155         status = decode_putfh(&xdr);
4156         if (status)
4157                 goto out;
4158         status = decode_readlink(&xdr, rqstp);
4159 out:
4160         return status;
4161 }
4162
4163 /*
4164  * Decode READDIR response
4165  */
4166 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4167 {
4168         struct xdr_stream xdr;
4169         struct compound_hdr hdr;
4170         int status;
4171
4172         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4173         status = decode_compound_hdr(&xdr, &hdr);
4174         if (status)
4175                 goto out;
4176         status = decode_putfh(&xdr);
4177         if (status)
4178                 goto out;
4179         status = decode_readdir(&xdr, rqstp, res);
4180 out:
4181         return status;
4182 }
4183
4184 /*
4185  * Decode Read response
4186  */
4187 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4188 {
4189         struct xdr_stream xdr;
4190         struct compound_hdr hdr;
4191         int status;
4192
4193         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4194         status = decode_compound_hdr(&xdr, &hdr);
4195         if (status)
4196                 goto out;
4197         status = decode_putfh(&xdr);
4198         if (status)
4199                 goto out;
4200         status = decode_read(&xdr, rqstp, res);
4201         if (!status)
4202                 status = res->count;
4203 out:
4204         return status;
4205 }
4206
4207 /*
4208  * Decode WRITE response
4209  */
4210 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4211 {
4212         struct xdr_stream xdr;
4213         struct compound_hdr hdr;
4214         int status;
4215
4216         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4217         status = decode_compound_hdr(&xdr, &hdr);
4218         if (status)
4219                 goto out;
4220         status = decode_putfh(&xdr);
4221         if (status)
4222                 goto out;
4223         status = decode_write(&xdr, res);
4224         if (status)
4225                 goto out;
4226         decode_getfattr(&xdr, res->fattr, res->server);
4227         if (!status)
4228                 status = res->count;
4229 out:
4230         return status;
4231 }
4232
4233 /*
4234  * Decode COMMIT response
4235  */
4236 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4237 {
4238         struct xdr_stream xdr;
4239         struct compound_hdr hdr;
4240         int status;
4241
4242         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4243         status = decode_compound_hdr(&xdr, &hdr);
4244         if (status)
4245                 goto out;
4246         status = decode_putfh(&xdr);
4247         if (status)
4248                 goto out;
4249         status = decode_commit(&xdr, res);
4250         if (status)
4251                 goto out;
4252         decode_getfattr(&xdr, res->fattr, res->server);
4253 out:
4254         return status;
4255 }
4256
4257 /*
4258  * FSINFO request
4259  */
4260 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4261 {
4262         struct xdr_stream xdr;
4263         struct compound_hdr hdr;
4264         int status;
4265
4266         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4267         status = decode_compound_hdr(&xdr, &hdr);
4268         if (!status)
4269                 status = decode_putfh(&xdr);
4270         if (!status)
4271                 status = decode_fsinfo(&xdr, fsinfo);
4272         if (!status)
4273                 status = -nfs4_stat_to_errno(hdr.status);
4274         return status;
4275 }
4276
4277 /*
4278  * PATHCONF request
4279  */
4280 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4281 {
4282         struct xdr_stream xdr;
4283         struct compound_hdr hdr;
4284         int status;
4285
4286         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4287         status = decode_compound_hdr(&xdr, &hdr);
4288         if (!status)
4289                 status = decode_putfh(&xdr);
4290         if (!status)
4291                 status = decode_pathconf(&xdr, pathconf);
4292         return status;
4293 }
4294
4295 /*
4296  * STATFS request
4297  */
4298 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4299 {
4300         struct xdr_stream xdr;
4301         struct compound_hdr hdr;
4302         int status;
4303
4304         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4305         status = decode_compound_hdr(&xdr, &hdr);
4306         if (!status)
4307                 status = decode_putfh(&xdr);
4308         if (!status)
4309                 status = decode_statfs(&xdr, fsstat);
4310         return status;
4311 }
4312
4313 /*
4314  * GETATTR_BITMAP request
4315  */
4316 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4317 {
4318         struct xdr_stream xdr;
4319         struct compound_hdr hdr;
4320         int status;
4321
4322         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4323         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4324                 goto out;
4325         if ((status = decode_putfh(&xdr)) != 0)
4326                 goto out;
4327         status = decode_server_caps(&xdr, res);
4328 out:
4329         return status;
4330 }
4331
4332 /*
4333  * Decode RENEW response
4334  */
4335 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4336 {
4337         struct xdr_stream xdr;
4338         struct compound_hdr hdr;
4339         int status;
4340
4341         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4342         status = decode_compound_hdr(&xdr, &hdr);
4343         if (!status)
4344                 status = decode_renew(&xdr);
4345         return status;
4346 }
4347
4348 /*
4349  * a SETCLIENTID request
4350  */
4351 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4352                 struct nfs_client *clp)
4353 {
4354         struct xdr_stream xdr;
4355         struct compound_hdr hdr;
4356         int status;
4357
4358         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4359         status = decode_compound_hdr(&xdr, &hdr);
4360         if (!status)
4361                 status = decode_setclientid(&xdr, clp);
4362         if (!status)
4363                 status = -nfs4_stat_to_errno(hdr.status);
4364         return status;
4365 }
4366
4367 /*
4368  * a SETCLIENTID_CONFIRM request
4369  */
4370 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4371 {
4372         struct xdr_stream xdr;
4373         struct compound_hdr hdr;
4374         int status;
4375
4376         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4377         status = decode_compound_hdr(&xdr, &hdr);
4378         if (!status)
4379                 status = decode_setclientid_confirm(&xdr);
4380         if (!status)
4381                 status = decode_putrootfh(&xdr);
4382         if (!status)
4383                 status = decode_fsinfo(&xdr, fsinfo);
4384         if (!status)
4385                 status = -nfs4_stat_to_errno(hdr.status);
4386         return status;
4387 }
4388
4389 /*
4390  * DELEGRETURN request
4391  */
4392 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4393 {
4394         struct xdr_stream xdr;
4395         struct compound_hdr hdr;
4396         int status;
4397
4398         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4399         status = decode_compound_hdr(&xdr, &hdr);
4400         if (status != 0)
4401                 goto out;
4402         status = decode_putfh(&xdr);
4403         if (status != 0)
4404                 goto out;
4405         status = decode_delegreturn(&xdr);
4406         decode_getfattr(&xdr, res->fattr, res->server);
4407 out:
4408         return status;
4409 }
4410
4411 /*
4412  * FS_LOCATIONS request
4413  */
4414 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4415 {
4416         struct xdr_stream xdr;
4417         struct compound_hdr hdr;
4418         int status;
4419
4420         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4421         status = decode_compound_hdr(&xdr, &hdr);
4422         if (status != 0)
4423                 goto out;
4424         if ((status = decode_putfh(&xdr)) != 0)
4425                 goto out;
4426         if ((status = decode_lookup(&xdr)) != 0)
4427                 goto out;
4428         xdr_enter_page(&xdr, PAGE_SIZE);
4429         status = decode_getfattr(&xdr, &res->fattr, res->server);
4430 out:
4431         return status;
4432 }
4433
4434 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4435 {
4436         uint32_t bitmap[2] = {0};
4437         uint32_t len;
4438
4439         if (!*p++) {
4440                 if (!*p)
4441                         return ERR_PTR(-EAGAIN);
4442                 entry->eof = 1;
4443                 return ERR_PTR(-EBADCOOKIE);
4444         }
4445
4446         entry->prev_cookie = entry->cookie;
4447         p = xdr_decode_hyper(p, &entry->cookie);
4448         entry->len = ntohl(*p++);
4449         entry->name = (const char *) p;
4450         p += XDR_QUADLEN(entry->len);
4451
4452         /*
4453          * In case the server doesn't return an inode number,
4454          * we fake one here.  (We don't use inode number 0,
4455          * since glibc seems to choke on it...)
4456          */
4457         entry->ino = 1;
4458
4459         len = ntohl(*p++);              /* bitmap length */
4460         if (len-- > 0) {
4461                 bitmap[0] = ntohl(*p++);
4462                 if (len-- > 0) {
4463                         bitmap[1] = ntohl(*p++);
4464                         p += len;
4465                 }
4466         }
4467         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4468         if (len > 0) {
4469                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4470                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4471                         /* Ignore the return value of rdattr_error for now */
4472                         p++;
4473                         len--;
4474                 }
4475                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4476                         xdr_decode_hyper(p, &entry->ino);
4477                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4478                         xdr_decode_hyper(p, &entry->ino);
4479                 p += len;
4480         }
4481
4482         entry->eof = !p[0] && p[1];
4483         return p;
4484 }
4485
4486 /*
4487  * We need to translate between nfs status return values and
4488  * the local errno values which may not be the same.
4489  */
4490 static struct {
4491         int stat;
4492         int errno;
4493 } nfs_errtbl[] = {
4494         { NFS4_OK,              0               },
4495         { NFS4ERR_PERM,         EPERM           },
4496         { NFS4ERR_NOENT,        ENOENT          },
4497         { NFS4ERR_IO,           errno_NFSERR_IO },
4498         { NFS4ERR_NXIO,         ENXIO           },
4499         { NFS4ERR_ACCESS,       EACCES          },
4500         { NFS4ERR_EXIST,        EEXIST          },
4501         { NFS4ERR_XDEV,         EXDEV           },
4502         { NFS4ERR_NOTDIR,       ENOTDIR         },
4503         { NFS4ERR_ISDIR,        EISDIR          },
4504         { NFS4ERR_INVAL,        EINVAL          },
4505         { NFS4ERR_FBIG,         EFBIG           },
4506         { NFS4ERR_NOSPC,        ENOSPC          },
4507         { NFS4ERR_ROFS,         EROFS           },
4508         { NFS4ERR_MLINK,        EMLINK          },
4509         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4510         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4511         { NFS4ERR_DQUOT,        EDQUOT          },
4512         { NFS4ERR_STALE,        ESTALE          },
4513         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4514         { NFS4ERR_BADOWNER,     EINVAL          },
4515         { NFS4ERR_BADNAME,      EINVAL          },
4516         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4517         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4518         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4519         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4520         { NFS4ERR_BADTYPE,      EBADTYPE        },
4521         { NFS4ERR_LOCKED,       EAGAIN          },
4522         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4523         { NFS4ERR_SYMLINK,      ELOOP           },
4524         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4525         { NFS4ERR_DEADLOCK,     EDEADLK         },
4526         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4527                                                     * to be handled by a
4528                                                     * middle-layer.
4529                                                     */
4530         { -1,                   EIO             }
4531 };
4532
4533 /*
4534  * Convert an NFS error code to a local one.
4535  * This one is used jointly by NFSv2 and NFSv3.
4536  */
4537 static int
4538 nfs4_stat_to_errno(int stat)
4539 {
4540         int i;
4541         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4542                 if (nfs_errtbl[i].stat == stat)
4543                         return nfs_errtbl[i].errno;
4544         }
4545         if (stat <= 10000 || stat > 10100) {
4546                 /* The server is looney tunes. */
4547                 return ESERVERFAULT;
4548         }
4549         /* If we cannot translate the error, the recovery routines should
4550          * handle it.
4551          * Note: remaining NFSv4 error codes have values > 10000, so should
4552          * not conflict with native Linux error codes.
4553          */
4554         return stat;
4555 }
4556
4557 #define PROC(proc, argtype, restype)                            \
4558 [NFSPROC4_CLNT_##proc] = {                                      \
4559         .p_proc   = NFSPROC4_COMPOUND,                          \
4560         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4561         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4562         .p_arglen = NFS4_##argtype##_sz,                        \
4563         .p_replen = NFS4_##restype##_sz,                        \
4564         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4565         .p_name   = #proc,                                      \
4566     }
4567
4568 struct rpc_procinfo     nfs4_procedures[] = {
4569   PROC(READ,            enc_read,       dec_read),
4570   PROC(WRITE,           enc_write,      dec_write),
4571   PROC(COMMIT,          enc_commit,     dec_commit),
4572   PROC(OPEN,            enc_open,       dec_open),
4573   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4574   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4575   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4576   PROC(CLOSE,           enc_close,      dec_close),
4577   PROC(SETATTR,         enc_setattr,    dec_setattr),
4578   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4579   PROC(RENEW,           enc_renew,      dec_renew),
4580   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4581   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4582   PROC(LOCK,            enc_lock,       dec_lock),
4583   PROC(LOCKT,           enc_lockt,      dec_lockt),
4584   PROC(LOCKU,           enc_locku,      dec_locku),
4585   PROC(ACCESS,          enc_access,     dec_access),
4586   PROC(GETATTR,         enc_getattr,    dec_getattr),
4587   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4588   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4589   PROC(REMOVE,          enc_remove,     dec_remove),
4590   PROC(RENAME,          enc_rename,     dec_rename),
4591   PROC(LINK,            enc_link,       dec_link),
4592   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4593   PROC(CREATE,          enc_create,     dec_create),
4594   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4595   PROC(STATFS,          enc_statfs,     dec_statfs),
4596   PROC(READLINK,        enc_readlink,   dec_readlink),
4597   PROC(READDIR,         enc_readdir,    dec_readdir),
4598   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4599   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4600   PROC(GETACL,          enc_getacl,     dec_getacl),
4601   PROC(SETACL,          enc_setacl,     dec_setacl),
4602   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4603 };
4604
4605 struct rpc_version              nfs_version4 = {
4606         .number                 = 4,
4607         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4608         .procs                  = nfs4_procedures
4609 };
4610
4611 /*
4612  * Local variables:
4613  *  c-basic-offset: 8
4614  * End:
4615  */