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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+sizeof(arg->stateid->data));
 650         WRITE32(OP_CLOSE);
 651         WRITE32(arg->seqid->sequence->counter);
 652         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
 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(40);
 797                 WRITE32(args->open_seqid->sequence->counter);
 798                 WRITEMEM(args->open_stateid->data, sizeof(args->open_stateid->data));
 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(20);
 806                 WRITEMEM(args->lock_stateid->data, sizeof(args->lock_stateid->data));
 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(44);
 834         WRITE32(OP_LOCKU);
 835         WRITE32(nfs4_lock_type(args->fl, 0));
 836         WRITE32(args->seqid->sequence->counter);
 837         WRITEMEM(args->stateid->data, sizeof(args->stateid->data));
 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+sizeof(stateid->data));
 970         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
 971         WRITEMEM(stateid->data, sizeof(stateid->data));
 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(8+sizeof(arg->stateid->data));
1000         WRITE32(OP_OPEN_CONFIRM);
1001         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
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(8+sizeof(arg->stateid->data));
1012         WRITE32(OP_OPEN_DOWNGRADE);
1013         WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data));
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(16);
1049         if (ctx->state != NULL) {
1050                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1051                 WRITEMEM(stateid.data, sizeof(stateid.data));
1052         } else
1053                 WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
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(32+sizeof(nfs4_verifier));
1083         WRITE32(OP_READDIR);
1084         WRITE64(readdir->cookie);
1085         WRITEMEM(readdir->verifier.data, sizeof(readdir->verifier.data));
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+sizeof(zero_stateid.data));
1194         WRITE32(OP_SETATTR);
1195         WRITEMEM(zero_stateid.data, sizeof(zero_stateid.data));
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+sizeof(arg->stateid.data));
1224         WRITE32(OP_SETATTR);
1225         WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data));
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 + sizeof(setclientid->sc_verifier->data));
1238         WRITE32(OP_SETCLIENTID);
1239         WRITEMEM(setclientid->sc_verifier->data, sizeof(setclientid->sc_verifier->data));
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 + sizeof(client_state->cl_confirm.data));
1257         WRITE32(OP_SETCLIENTID_CONFIRM);
1258         WRITE64(client_state->cl_clientid);
1259         WRITEMEM(client_state->cl_confirm.data, sizeof(client_state->cl_confirm.data));
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(20);
1288
1289         WRITE32(OP_DELEGRETURN);
1290         WRITEMEM(stateid->data, sizeof(stateid->data));
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 (!p) { \
2084                 printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
2085                                 __FUNCTION__, __LINE__); \
2086                 return -EIO; \
2087         } \
2088 } while (0)
2089
2090 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2091 {
2092         __be32 *p;
2093
2094         READ_BUF(4);
2095         READ32(*len);
2096         READ_BUF(*len);
2097         *string = (char *)p;
2098         return 0;
2099 }
2100
2101 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2102 {
2103         __be32 *p;
2104
2105         READ_BUF(8);
2106         READ32(hdr->status);
2107         READ32(hdr->taglen);
2108
2109         READ_BUF(hdr->taglen + 4);
2110         hdr->tag = (char *)p;
2111         p += XDR_QUADLEN(hdr->taglen);
2112         READ32(hdr->nops);
2113         return 0;
2114 }
2115
2116 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2117 {
2118         __be32 *p;
2119         uint32_t opnum;
2120         int32_t nfserr;
2121
2122         READ_BUF(8);
2123         READ32(opnum);
2124         if (opnum != expected) {
2125                 printk(KERN_NOTICE
2126                                 "nfs4_decode_op_hdr: Server returned operation"
2127                                 " %d but we issued a request for %d\n",
2128                                 opnum, expected);
2129                 return -EIO;
2130         }
2131         READ32(nfserr);
2132         if (nfserr != NFS_OK)
2133                 return -nfs4_stat_to_errno(nfserr);
2134         return 0;
2135 }
2136
2137 /* Dummy routine */
2138 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2139 {
2140         __be32 *p;
2141         unsigned int strlen;
2142         char *str;
2143
2144         READ_BUF(12);
2145         return decode_opaque_inline(xdr, &strlen, &str);
2146 }
2147
2148 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2149 {
2150         uint32_t bmlen;
2151         __be32 *p;
2152
2153         READ_BUF(4);
2154         READ32(bmlen);
2155
2156         bitmap[0] = bitmap[1] = 0;
2157         READ_BUF((bmlen << 2));
2158         if (bmlen > 0) {
2159                 READ32(bitmap[0]);
2160                 if (bmlen > 1)
2161                         READ32(bitmap[1]);
2162         }
2163         return 0;
2164 }
2165
2166 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2167 {
2168         __be32 *p;
2169
2170         READ_BUF(4);
2171         READ32(*attrlen);
2172         *savep = xdr->p;
2173         return 0;
2174 }
2175
2176 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2177 {
2178         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2179                 decode_attr_bitmap(xdr, bitmask);
2180                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2181         } else
2182                 bitmask[0] = bitmask[1] = 0;
2183         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2184         return 0;
2185 }
2186
2187 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2188 {
2189         __be32 *p;
2190
2191         *type = 0;
2192         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2193                 return -EIO;
2194         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2195                 READ_BUF(4);
2196                 READ32(*type);
2197                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2198                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2199                         return -EIO;
2200                 }
2201                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2202         }
2203         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2204         return 0;
2205 }
2206
2207 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2208 {
2209         __be32 *p;
2210
2211         *change = 0;
2212         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2213                 return -EIO;
2214         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2215                 READ_BUF(8);
2216                 READ64(*change);
2217                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2218         }
2219         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2220                         (unsigned long long)*change);
2221         return 0;
2222 }
2223
2224 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2225 {
2226         __be32 *p;
2227
2228         *size = 0;
2229         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2230                 return -EIO;
2231         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2232                 READ_BUF(8);
2233                 READ64(*size);
2234                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2235         }
2236         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2237         return 0;
2238 }
2239
2240 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2241 {
2242         __be32 *p;
2243
2244         *res = 0;
2245         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2246                 return -EIO;
2247         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2248                 READ_BUF(4);
2249                 READ32(*res);
2250                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2251         }
2252         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2253         return 0;
2254 }
2255
2256 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2257 {
2258         __be32 *p;
2259
2260         *res = 0;
2261         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2262                 return -EIO;
2263         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2264                 READ_BUF(4);
2265                 READ32(*res);
2266                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2267         }
2268         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2269         return 0;
2270 }
2271
2272 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2273 {
2274         __be32 *p;
2275
2276         fsid->major = 0;
2277         fsid->minor = 0;
2278         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2279                 return -EIO;
2280         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2281                 READ_BUF(16);
2282                 READ64(fsid->major);
2283                 READ64(fsid->minor);
2284                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2285         }
2286         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2287                         (unsigned long long)fsid->major,
2288                         (unsigned long long)fsid->minor);
2289         return 0;
2290 }
2291
2292 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2293 {
2294         __be32 *p;
2295
2296         *res = 60;
2297         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2298                 return -EIO;
2299         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2300                 READ_BUF(4);
2301                 READ32(*res);
2302                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2303         }
2304         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2305         return 0;
2306 }
2307
2308 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2309 {
2310         __be32 *p;
2311
2312         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2313         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2314                 return -EIO;
2315         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2316                 READ_BUF(4);
2317                 READ32(*res);
2318                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2319         }
2320         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2321         return 0;
2322 }
2323
2324 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2325 {
2326         __be32 *p;
2327
2328         *fileid = 0;
2329         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2330                 return -EIO;
2331         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2332                 READ_BUF(8);
2333                 READ64(*fileid);
2334                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2335         }
2336         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2337         return 0;
2338 }
2339
2340 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2341 {
2342         __be32 *p;
2343
2344         *fileid = 0;
2345         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2346                 return -EIO;
2347         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2348                 READ_BUF(8);
2349                 READ64(*fileid);
2350                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2351         }
2352         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2353         return 0;
2354 }
2355
2356 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2357 {
2358         __be32 *p;
2359         int status = 0;
2360
2361         *res = 0;
2362         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2363                 return -EIO;
2364         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2365                 READ_BUF(8);
2366                 READ64(*res);
2367                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2368         }
2369         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2370         return status;
2371 }
2372
2373 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2374 {
2375         __be32 *p;
2376         int status = 0;
2377
2378         *res = 0;
2379         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2380                 return -EIO;
2381         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2382                 READ_BUF(8);
2383                 READ64(*res);
2384                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2385         }
2386         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2387         return status;
2388 }
2389
2390 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2391 {
2392         __be32 *p;
2393         int status = 0;
2394
2395         *res = 0;
2396         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2397                 return -EIO;
2398         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2399                 READ_BUF(8);
2400                 READ64(*res);
2401                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2402         }
2403         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2404         return status;
2405 }
2406
2407 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2408 {
2409         int n;
2410         __be32 *p;
2411         int status = 0;
2412
2413         READ_BUF(4);
2414         READ32(n);
2415         if (n < 0)
2416                 goto out_eio;
2417         if (n == 0)
2418                 goto root_path;
2419         dprintk("path ");
2420         path->ncomponents = 0;
2421         while (path->ncomponents < n) {
2422                 struct nfs4_string *component = &path->components[path->ncomponents];
2423                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2424                 if (unlikely(status != 0))
2425                         goto out_eio;
2426                 if (path->ncomponents != n)
2427                         dprintk("/");
2428                 dprintk("%s", component->data);
2429                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2430                         path->ncomponents++;
2431                 else {
2432                         dprintk("cannot parse %d components in path\n", n);
2433                         goto out_eio;
2434                 }
2435         }
2436 out:
2437         dprintk("\n");
2438         return status;
2439 root_path:
2440 /* a root pathname is sent as a zero component4 */
2441         path->ncomponents = 1;
2442         path->components[0].len=0;
2443         path->components[0].data=NULL;
2444         dprintk("path /\n");
2445         goto out;
2446 out_eio:
2447         dprintk(" status %d", status);
2448         status = -EIO;
2449         goto out;
2450 }
2451
2452 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2453 {
2454         int n;
2455         __be32 *p;
2456         int status = -EIO;
2457
2458         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2459                 goto out;
2460         status = 0;
2461         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2462                 goto out;
2463         dprintk("%s: fsroot ", __FUNCTION__);
2464         status = decode_pathname(xdr, &res->fs_path);
2465         if (unlikely(status != 0))
2466                 goto out;
2467         READ_BUF(4);
2468         READ32(n);
2469         if (n <= 0)
2470                 goto out_eio;
2471         res->nlocations = 0;
2472         while (res->nlocations < n) {
2473                 int m;
2474                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2475
2476                 READ_BUF(4);
2477                 READ32(m);
2478                 if (m <= 0)
2479                         goto out_eio;
2480
2481                 loc->nservers = 0;
2482                 dprintk("%s: servers ", __FUNCTION__);
2483                 while (loc->nservers < m) {
2484                         struct nfs4_string *server = &loc->servers[loc->nservers];
2485                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2486                         if (unlikely(status != 0))
2487                                 goto out_eio;
2488                         dprintk("%s ", server->data);
2489                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2490                                 loc->nservers++;
2491                         else {
2492                                 int i;
2493                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2494                                 for (i = loc->nservers; i < m; i++) {
2495                                         int len;
2496                                         char *data;
2497                                         status = decode_opaque_inline(xdr, &len, &data);
2498                                         if (unlikely(status != 0))
2499                                                 goto out_eio;
2500                                 }
2501                         }
2502                 }
2503                 status = decode_pathname(xdr, &loc->rootpath);
2504                 if (unlikely(status != 0))
2505                         goto out_eio;
2506                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2507                         res->nlocations++;
2508         }
2509 out:
2510         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2511         return status;
2512 out_eio:
2513         status = -EIO;
2514         goto out;
2515 }
2516
2517 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2518 {
2519         __be32 *p;
2520         int status = 0;
2521
2522         *res = 0;
2523         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2524                 return -EIO;
2525         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2526                 READ_BUF(8);
2527                 READ64(*res);
2528                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2529         }
2530         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2531         return status;
2532 }
2533
2534 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2535 {
2536         __be32 *p;
2537         int status = 0;
2538
2539         *maxlink = 1;
2540         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2541                 return -EIO;
2542         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2543                 READ_BUF(4);
2544                 READ32(*maxlink);
2545                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2546         }
2547         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2548         return status;
2549 }
2550
2551 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2552 {
2553         __be32 *p;
2554         int status = 0;
2555
2556         *maxname = 1024;
2557         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2558                 return -EIO;
2559         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2560                 READ_BUF(4);
2561                 READ32(*maxname);
2562                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2563         }
2564         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2565         return status;
2566 }
2567
2568 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2569 {
2570         __be32 *p;
2571         int status = 0;
2572
2573         *res = 1024;
2574         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2575                 return -EIO;
2576         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2577                 uint64_t maxread;
2578                 READ_BUF(8);
2579                 READ64(maxread);
2580                 if (maxread > 0x7FFFFFFF)
2581                         maxread = 0x7FFFFFFF;
2582                 *res = (uint32_t)maxread;
2583                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2584         }
2585         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2586         return status;
2587 }
2588
2589 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2590 {
2591         __be32 *p;
2592         int status = 0;
2593
2594         *res = 1024;
2595         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2596                 return -EIO;
2597         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2598                 uint64_t maxwrite;
2599                 READ_BUF(8);
2600                 READ64(maxwrite);
2601                 if (maxwrite > 0x7FFFFFFF)
2602                         maxwrite = 0x7FFFFFFF;
2603                 *res = (uint32_t)maxwrite;
2604                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2605         }
2606         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2607         return status;
2608 }
2609
2610 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2611 {
2612         __be32 *p;
2613
2614         *mode = 0;
2615         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2616                 return -EIO;
2617         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2618                 READ_BUF(4);
2619                 READ32(*mode);
2620                 *mode &= ~S_IFMT;
2621                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2622         }
2623         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2624         return 0;
2625 }
2626
2627 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2628 {
2629         __be32 *p;
2630
2631         *nlink = 1;
2632         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2633                 return -EIO;
2634         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2635                 READ_BUF(4);
2636                 READ32(*nlink);
2637                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2638         }
2639         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2640         return 0;
2641 }
2642
2643 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *uid)
2644 {
2645         uint32_t len;
2646         __be32 *p;
2647
2648         *uid = -2;
2649         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2650                 return -EIO;
2651         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2652                 READ_BUF(4);
2653                 READ32(len);
2654                 READ_BUF(len);
2655                 if (len < XDR_MAX_NETOBJ) {
2656                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2657                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2658                                                 __FUNCTION__);
2659                 } else
2660                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2661                                         __FUNCTION__, len);
2662                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2663         }
2664         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2665         return 0;
2666 }
2667
2668 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *gid)
2669 {
2670         uint32_t len;
2671         __be32 *p;
2672
2673         *gid = -2;
2674         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2675                 return -EIO;
2676         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2677                 READ_BUF(4);
2678                 READ32(len);
2679                 READ_BUF(len);
2680                 if (len < XDR_MAX_NETOBJ) {
2681                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2682                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2683                                                 __FUNCTION__);
2684                 } else
2685                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2686                                         __FUNCTION__, len);
2687                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2688         }
2689         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2690         return 0;
2691 }
2692
2693 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2694 {
2695         uint32_t major = 0, minor = 0;
2696         __be32 *p;
2697
2698         *rdev = MKDEV(0,0);
2699         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2700                 return -EIO;
2701         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2702                 dev_t tmp;
2703
2704                 READ_BUF(8);
2705                 READ32(major);
2706                 READ32(minor);
2707                 tmp = MKDEV(major, minor);
2708                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2709                         *rdev = tmp;
2710                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2711         }
2712         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2713         return 0;
2714 }
2715
2716 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2717 {
2718         __be32 *p;
2719         int status = 0;
2720
2721         *res = 0;
2722         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2723                 return -EIO;
2724         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2725                 READ_BUF(8);
2726                 READ64(*res);
2727                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2728         }
2729         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2730         return status;
2731 }
2732
2733 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2734 {
2735         __be32 *p;
2736         int status = 0;
2737
2738         *res = 0;
2739         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2740                 return -EIO;
2741         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2742                 READ_BUF(8);
2743                 READ64(*res);
2744                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2745         }
2746         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2747         return status;
2748 }
2749
2750 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2751 {
2752         __be32 *p;
2753         int status = 0;
2754
2755         *res = 0;
2756         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2757                 return -EIO;
2758         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2759                 READ_BUF(8);
2760                 READ64(*res);
2761                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2762         }
2763         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2764         return status;
2765 }
2766
2767 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2768 {
2769         __be32 *p;
2770
2771         *used = 0;
2772         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2773                 return -EIO;
2774         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2775                 READ_BUF(8);
2776                 READ64(*used);
2777                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2778         }
2779         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2780                         (unsigned long long)*used);
2781         return 0;
2782 }
2783
2784 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2785 {
2786         __be32 *p;
2787         uint64_t sec;
2788         uint32_t nsec;
2789
2790         READ_BUF(12);
2791         READ64(sec);
2792         READ32(nsec);
2793         time->tv_sec = (time_t)sec;
2794         time->tv_nsec = (long)nsec;
2795         return 0;
2796 }
2797
2798 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2799 {
2800         int status = 0;
2801
2802         time->tv_sec = 0;
2803         time->tv_nsec = 0;
2804         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2805                 return -EIO;
2806         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2807                 status = decode_attr_time(xdr, time);
2808                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2809         }
2810         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2811         return status;
2812 }
2813
2814 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2815 {
2816         int status = 0;
2817
2818         time->tv_sec = 0;
2819         time->tv_nsec = 0;
2820         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2821                 return -EIO;
2822         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2823                 status = decode_attr_time(xdr, time);
2824                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2825         }
2826         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2827         return status;
2828 }
2829
2830 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2831 {
2832         int status = 0;
2833
2834         time->tv_sec = 0;
2835         time->tv_nsec = 0;
2836         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2837                 return -EIO;
2838         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2839                 status = decode_attr_time(xdr, time);
2840                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2841         }
2842         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2843         return status;
2844 }
2845
2846 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2847 {
2848         unsigned int attrwords = XDR_QUADLEN(attrlen);
2849         unsigned int nwords = xdr->p - savep;
2850
2851         if (unlikely(attrwords != nwords)) {
2852                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2853                                 __FUNCTION__,
2854                                 attrwords << 2,
2855                                 (attrwords < nwords) ? '<' : '>',
2856                                 nwords << 2);
2857                 return -EIO;
2858         }
2859         return 0;
2860 }
2861
2862 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2863 {
2864         __be32 *p;
2865
2866         READ_BUF(20);
2867         READ32(cinfo->atomic);
2868         READ64(cinfo->before);
2869         READ64(cinfo->after);
2870         return 0;
2871 }
2872
2873 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2874 {
2875         __be32 *p;
2876         uint32_t supp, acc;
2877         int status;
2878
2879         status = decode_op_hdr(xdr, OP_ACCESS);
2880         if (status)
2881                 return status;
2882         READ_BUF(8);
2883         READ32(supp);
2884         READ32(acc);
2885         access->supported = supp;
2886         access->access = acc;
2887         return 0;
2888 }
2889
2890 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2891 {
2892         __be32 *p;
2893         int status;
2894
2895         status = decode_op_hdr(xdr, OP_CLOSE);
2896         if (status)
2897                 return status;
2898         READ_BUF(sizeof(res->stateid.data));
2899         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
2900         return 0;
2901 }
2902
2903 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2904 {
2905         __be32 *p;
2906         int status;
2907
2908         status = decode_op_hdr(xdr, OP_COMMIT);
2909         if (status)
2910                 return status;
2911         READ_BUF(8);
2912         COPYMEM(res->verf->verifier, 8);
2913         return 0;
2914 }
2915
2916 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2917 {
2918         __be32 *p;
2919         uint32_t bmlen;
2920         int status;
2921
2922         status = decode_op_hdr(xdr, OP_CREATE);
2923         if (status)
2924                 return status;
2925         if ((status = decode_change_info(xdr, cinfo)))
2926                 return status;
2927         READ_BUF(4);
2928         READ32(bmlen);
2929         READ_BUF(bmlen << 2);
2930         return 0;
2931 }
2932
2933 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2934 {
2935         __be32 *savep;
2936         uint32_t attrlen,
2937                  bitmap[2] = {0};
2938         int status;
2939
2940         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2941                 goto xdr_error;
2942         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2943                 goto xdr_error;
2944         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2945                 goto xdr_error;
2946         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2947                 goto xdr_error;
2948         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2949                 goto xdr_error;
2950         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2951                 goto xdr_error;
2952         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2953                 goto xdr_error;
2954         status = verify_attr_len(xdr, savep, attrlen);
2955 xdr_error:
2956         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2957         return status;
2958 }
2959
2960 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2961 {
2962         __be32 *savep;
2963         uint32_t attrlen,
2964                  bitmap[2] = {0};
2965         int status;
2966
2967         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2968                 goto xdr_error;
2969         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2970                 goto xdr_error;
2971         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2972                 goto xdr_error;
2973
2974         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2975                 goto xdr_error;
2976         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2977                 goto xdr_error;
2978         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2979                 goto xdr_error;
2980         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2981                 goto xdr_error;
2982         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2983                 goto xdr_error;
2984         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2985                 goto xdr_error;
2986
2987         status = verify_attr_len(xdr, savep, attrlen);
2988 xdr_error:
2989         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2990         return status;
2991 }
2992
2993 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2994 {
2995         __be32 *savep;
2996         uint32_t attrlen,
2997                  bitmap[2] = {0};
2998         int status;
2999
3000         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3001                 goto xdr_error;
3002         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3003                 goto xdr_error;
3004         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3005                 goto xdr_error;
3006
3007         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3008                 goto xdr_error;
3009         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3010                 goto xdr_error;
3011
3012         status = verify_attr_len(xdr, savep, attrlen);
3013 xdr_error:
3014         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3015         return status;
3016 }
3017
3018 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3019 {
3020         __be32 *savep;
3021         uint32_t attrlen,
3022                  bitmap[2] = {0},
3023                  type;
3024         int status, fmode = 0;
3025         uint64_t fileid;
3026
3027         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3028                 goto xdr_error;
3029         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3030                 goto xdr_error;
3031
3032         fattr->bitmap[0] = bitmap[0];
3033         fattr->bitmap[1] = bitmap[1];
3034
3035         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3036                 goto xdr_error;
3037
3038
3039         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3040                 goto xdr_error;
3041         fattr->type = nfs_type2fmt[type].nfs2type;
3042         fmode = nfs_type2fmt[type].mode;
3043
3044         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3045                 goto xdr_error;
3046         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3047                 goto xdr_error;
3048         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3049                 goto xdr_error;
3050         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3051                 goto xdr_error;
3052         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3053                                                 struct nfs4_fs_locations,
3054                                                 fattr))) != 0)
3055                 goto xdr_error;
3056         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3057                 goto xdr_error;
3058         fattr->mode |= fmode;
3059         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3060                 goto xdr_error;
3061         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3062                 goto xdr_error;
3063         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3064                 goto xdr_error;
3065         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3066                 goto xdr_error;
3067         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3068                 goto xdr_error;
3069         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3070                 goto xdr_error;
3071         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3072                 goto xdr_error;
3073         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3074                 goto xdr_error;
3075         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3076                 goto xdr_error;
3077         if (fattr->fileid == 0 && fileid != 0)
3078                 fattr->fileid = fileid;
3079         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3080                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3081 xdr_error:
3082         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3083         return status;
3084 }
3085
3086
3087 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3088 {
3089         __be32 *savep;
3090         uint32_t attrlen, bitmap[2];
3091         int status;
3092
3093         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3094                 goto xdr_error;
3095         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3096                 goto xdr_error;
3097         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3098                 goto xdr_error;
3099
3100         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3101
3102         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3103                 goto xdr_error;
3104         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3105                 goto xdr_error;
3106         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3107                 goto xdr_error;
3108         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3109         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3110                 goto xdr_error;
3111         fsinfo->wtpref = fsinfo->wtmax;
3112
3113         status = verify_attr_len(xdr, savep, attrlen);
3114 xdr_error:
3115         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3116         return status;
3117 }
3118
3119 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3120 {
3121         __be32 *p;
3122         uint32_t len;
3123         int status;
3124
3125         status = decode_op_hdr(xdr, OP_GETFH);
3126         if (status)
3127                 return status;
3128         /* Zero handle first to allow comparisons */
3129         memset(fh, 0, sizeof(*fh));
3130
3131         READ_BUF(4);
3132         READ32(len);
3133         if (len > NFS4_FHSIZE)
3134                 return -EIO;
3135         fh->size = len;
3136         READ_BUF(len);
3137         COPYMEM(fh->data, len);
3138         return 0;
3139 }
3140
3141 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3142 {
3143         int status;
3144
3145         status = decode_op_hdr(xdr, OP_LINK);
3146         if (status)
3147                 return status;
3148         return decode_change_info(xdr, cinfo);
3149 }
3150
3151 /*
3152  * We create the owner, so we know a proper owner.id length is 4.
3153  */
3154 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3155 {
3156         uint64_t offset, length, clientid;
3157         __be32 *p;
3158         uint32_t namelen, type;
3159
3160         READ_BUF(32);
3161         READ64(offset);
3162         READ64(length);
3163         READ32(type);
3164         if (fl != NULL) {
3165                 fl->fl_start = (loff_t)offset;
3166                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3167                 if (length == ~(uint64_t)0)
3168                         fl->fl_end = OFFSET_MAX;
3169                 fl->fl_type = F_WRLCK;
3170                 if (type & 1)
3171                         fl->fl_type = F_RDLCK;
3172                 fl->fl_pid = 0;
3173         }
3174         READ64(clientid);
3175         READ32(namelen);
3176         READ_BUF(namelen);
3177         return -NFS4ERR_DENIED;
3178 }
3179
3180 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3181 {
3182         __be32 *p;
3183         int status;
3184
3185         status = decode_op_hdr(xdr, OP_LOCK);
3186         if (status == 0) {
3187                 READ_BUF(sizeof(res->stateid.data));
3188                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3189         } else if (status == -NFS4ERR_DENIED)
3190                 return decode_lock_denied(xdr, NULL);
3191         return status;
3192 }
3193
3194 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3195 {
3196         int status;
3197         status = decode_op_hdr(xdr, OP_LOCKT);
3198         if (status == -NFS4ERR_DENIED)
3199                 return decode_lock_denied(xdr, res->denied);
3200         return status;
3201 }
3202
3203 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3204 {
3205         __be32 *p;
3206         int status;
3207
3208         status = decode_op_hdr(xdr, OP_LOCKU);
3209         if (status == 0) {
3210                 READ_BUF(sizeof(res->stateid.data));
3211                 COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3212         }
3213         return status;
3214 }
3215
3216 static int decode_lookup(struct xdr_stream *xdr)
3217 {
3218         return decode_op_hdr(xdr, OP_LOOKUP);
3219 }
3220
3221 /* This is too sick! */
3222 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3223 {
3224         __be32 *p;
3225         uint32_t limit_type, nblocks, blocksize;
3226
3227         READ_BUF(12);
3228         READ32(limit_type);
3229         switch (limit_type) {
3230                 case 1:
3231                         READ64(*maxsize);
3232                         break;
3233                 case 2:
3234                         READ32(nblocks);
3235                         READ32(blocksize);
3236                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3237         }
3238         return 0;
3239 }
3240
3241 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3242 {
3243         __be32 *p;
3244         uint32_t delegation_type;
3245
3246         READ_BUF(4);
3247         READ32(delegation_type);
3248         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3249                 res->delegation_type = 0;
3250                 return 0;
3251         }
3252         READ_BUF(20);
3253         COPYMEM(res->delegation.data, sizeof(res->delegation.data));
3254         READ32(res->do_recall);
3255         switch (delegation_type) {
3256                 case NFS4_OPEN_DELEGATE_READ:
3257                         res->delegation_type = FMODE_READ;
3258                         break;
3259                 case NFS4_OPEN_DELEGATE_WRITE:
3260                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3261                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3262                                 return -EIO;
3263         }
3264         return decode_ace(xdr, NULL, res->server->nfs_client);
3265 }
3266
3267 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3268 {
3269         __be32 *p;
3270         uint32_t bmlen;
3271         int status;
3272
3273         status = decode_op_hdr(xdr, OP_OPEN);
3274         if (status)
3275                 return status;
3276         READ_BUF(sizeof(res->stateid.data));
3277         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3278
3279         decode_change_info(xdr, &res->cinfo);
3280
3281         READ_BUF(8);
3282         READ32(res->rflags);
3283         READ32(bmlen);
3284         if (bmlen > 10)
3285                 goto xdr_error;
3286
3287         READ_BUF(bmlen << 2);
3288         p += bmlen;
3289         return decode_delegation(xdr, res);
3290 xdr_error:
3291         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3292         return -EIO;
3293 }
3294
3295 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3296 {
3297         __be32 *p;
3298         int status;
3299
3300         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3301         if (status)
3302                 return status;
3303         READ_BUF(sizeof(res->stateid.data));
3304         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3305         return 0;
3306 }
3307
3308 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3309 {
3310         __be32 *p;
3311         int status;
3312
3313         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3314         if (status)
3315                 return status;
3316         READ_BUF(sizeof(res->stateid.data));
3317         COPYMEM(res->stateid.data, sizeof(res->stateid.data));
3318         return 0;
3319 }
3320
3321 static int decode_putfh(struct xdr_stream *xdr)
3322 {
3323         return decode_op_hdr(xdr, OP_PUTFH);
3324 }
3325
3326 static int decode_putrootfh(struct xdr_stream *xdr)
3327 {
3328         return decode_op_hdr(xdr, OP_PUTROOTFH);
3329 }
3330
3331 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3332 {
3333         struct kvec *iov = req->rq_rcv_buf.head;
3334         __be32 *p;
3335         uint32_t count, eof, recvd, hdrlen;
3336         int status;
3337
3338         status = decode_op_hdr(xdr, OP_READ);
3339         if (status)
3340                 return status;
3341         READ_BUF(8);
3342         READ32(eof);
3343         READ32(count);
3344         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3345         recvd = req->rq_rcv_buf.len - hdrlen;
3346         if (count > recvd) {
3347                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3348                                 "count %u > recvd %u\n", count, recvd);
3349                 count = recvd;
3350                 eof = 0;
3351         }
3352         xdr_read_pages(xdr, count);
3353         res->eof = eof;
3354         res->count = count;
3355         return 0;
3356 }
3357
3358 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3359 {
3360         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3361         struct page     *page = *rcvbuf->pages;
3362         struct kvec     *iov = rcvbuf->head;
3363         unsigned int    nr, pglen = rcvbuf->page_len;
3364         __be32          *end, *entry, *p, *kaddr;
3365         uint32_t        len, attrlen, xlen;
3366         int             hdrlen, recvd, status;
3367
3368         status = decode_op_hdr(xdr, OP_READDIR);
3369         if (status)
3370                 return status;
3371         READ_BUF(8);
3372         COPYMEM(readdir->verifier.data, 8);
3373         dprintk("%s: verifier = 0x%x%x\n",
3374                         __FUNCTION__,
3375                         ((u32 *)readdir->verifier.data)[0],
3376                         ((u32 *)readdir->verifier.data)[1]);
3377
3378
3379         hdrlen = (char *) p - (char *) iov->iov_base;
3380         recvd = rcvbuf->len - hdrlen;
3381         if (pglen > recvd)
3382                 pglen = recvd;
3383         xdr_read_pages(xdr, pglen);
3384
3385         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3386         kaddr = p = kmap_atomic(page, KM_USER0);
3387         end = p + ((pglen + readdir->pgbase) >> 2);
3388         entry = p;
3389         for (nr = 0; *p++; nr++) {
3390                 if (end - p < 3)
3391                         goto short_pkt;
3392                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3393                 p += 2;                 /* cookie */
3394                 len = ntohl(*p++);      /* filename length */
3395                 if (len > NFS4_MAXNAMLEN) {
3396                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3397                         goto err_unmap;
3398                 }
3399                 xlen = XDR_QUADLEN(len);
3400                 if (end - p < xlen + 1)
3401                         goto short_pkt;
3402                 dprintk("filename = %*s\n", len, (char *)p);
3403                 p += xlen;
3404                 len = ntohl(*p++);      /* bitmap length */
3405                 if (end - p < len + 1)
3406                         goto short_pkt;
3407                 p += len;
3408                 attrlen = XDR_QUADLEN(ntohl(*p++));
3409                 if (end - p < attrlen + 2)
3410                         goto short_pkt;
3411                 p += attrlen;           /* attributes */
3412                 entry = p;
3413         }
3414         if (!nr && (entry[0] != 0 || entry[1] == 0))
3415                 goto short_pkt;
3416 out:
3417         kunmap_atomic(kaddr, KM_USER0);
3418         return 0;
3419 short_pkt:
3420         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3421         entry[0] = entry[1] = 0;
3422         /* truncate listing ? */
3423         if (!nr) {
3424                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3425                 entry[1] = 1;
3426         }
3427         goto out;
3428 err_unmap:
3429         kunmap_atomic(kaddr, KM_USER0);
3430         return -errno_NFSERR_IO;
3431 }
3432
3433 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3434 {
3435         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3436         struct kvec *iov = rcvbuf->head;
3437         int hdrlen, len, recvd;
3438         __be32 *p;
3439         char *kaddr;
3440         int status;
3441
3442         status = decode_op_hdr(xdr, OP_READLINK);
3443         if (status)
3444                 return status;
3445
3446         /* Convert length of symlink */
3447         READ_BUF(4);
3448         READ32(len);
3449         if (len >= rcvbuf->page_len || len <= 0) {
3450                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3451                 return -ENAMETOOLONG;
3452         }
3453         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3454         recvd = req->rq_rcv_buf.len - hdrlen;
3455         if (recvd < len) {
3456                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3457                                 "count %u > recvd %u\n", len, recvd);
3458                 return -EIO;
3459         }
3460         xdr_read_pages(xdr, len);
3461         /*
3462          * The XDR encode routine has set things up so that
3463          * the link text will be copied directly into the
3464          * buffer.  We just have to do overflow-checking,
3465          * and and null-terminate the text (the VFS expects
3466          * null-termination).
3467          */
3468         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3469         kaddr[len+rcvbuf->page_base] = '\0';
3470         kunmap_atomic(kaddr, KM_USER0);
3471         return 0;
3472 }
3473
3474 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3475 {
3476         int status;
3477
3478         status = decode_op_hdr(xdr, OP_REMOVE);
3479         if (status)
3480                 goto out;
3481         status = decode_change_info(xdr, cinfo);
3482 out:
3483         return status;
3484 }
3485
3486 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3487               struct nfs4_change_info *new_cinfo)
3488 {
3489         int status;
3490
3491         status = decode_op_hdr(xdr, OP_RENAME);
3492         if (status)
3493                 goto out;
3494         if ((status = decode_change_info(xdr, old_cinfo)))
3495                 goto out;
3496         status = decode_change_info(xdr, new_cinfo);
3497 out:
3498         return status;
3499 }
3500
3501 static int decode_renew(struct xdr_stream *xdr)
3502 {
3503         return decode_op_hdr(xdr, OP_RENEW);
3504 }
3505
3506 static int
3507 decode_restorefh(struct xdr_stream *xdr)
3508 {
3509         return decode_op_hdr(xdr, OP_RESTOREFH);
3510 }
3511
3512 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3513                 size_t *acl_len)
3514 {
3515         __be32 *savep;
3516         uint32_t attrlen,
3517                  bitmap[2] = {0};
3518         struct kvec *iov = req->rq_rcv_buf.head;
3519         int status;
3520
3521         *acl_len = 0;
3522         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3523                 goto out;
3524         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3525                 goto out;
3526         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3527                 goto out;
3528
3529         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3530                 return -EIO;
3531         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3532                 int hdrlen, recvd;
3533
3534                 /* We ignore &savep and don't do consistency checks on
3535                  * the attr length.  Let userspace figure it out.... */
3536                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3537                 recvd = req->rq_rcv_buf.len - hdrlen;
3538                 if (attrlen > recvd) {
3539                         printk(KERN_WARNING "NFS: server cheating in getattr"
3540                                         " acl reply: attrlen %u > recvd %u\n",
3541                                         attrlen, recvd);
3542                         return -EINVAL;
3543                 }
3544                 xdr_read_pages(xdr, attrlen);
3545                 *acl_len = attrlen;
3546         } else
3547                 status = -EOPNOTSUPP;
3548
3549 out:
3550         return status;
3551 }
3552
3553 static int
3554 decode_savefh(struct xdr_stream *xdr)
3555 {
3556         return decode_op_hdr(xdr, OP_SAVEFH);
3557 }
3558
3559 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3560 {
3561         __be32 *p;
3562         uint32_t bmlen;
3563         int status;
3564
3565
3566         status = decode_op_hdr(xdr, OP_SETATTR);
3567         if (status)
3568                 return status;
3569         READ_BUF(4);
3570         READ32(bmlen);
3571         READ_BUF(bmlen << 2);
3572         return 0;
3573 }
3574
3575 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3576 {
3577         __be32 *p;
3578         uint32_t opnum;
3579         int32_t nfserr;
3580
3581         READ_BUF(8);
3582         READ32(opnum);
3583         if (opnum != OP_SETCLIENTID) {
3584                 printk(KERN_NOTICE
3585                                 "nfs4_decode_setclientid: Server returned operation"
3586                                 " %d\n", opnum);
3587                 return -EIO;
3588         }
3589         READ32(nfserr);
3590         if (nfserr == NFS_OK) {
3591                 READ_BUF(8 + sizeof(clp->cl_confirm.data));
3592                 READ64(clp->cl_clientid);
3593                 COPYMEM(clp->cl_confirm.data, sizeof(clp->cl_confirm.data));
3594         } else if (nfserr == NFSERR_CLID_INUSE) {
3595                 uint32_t len;
3596
3597                 /* skip netid string */
3598                 READ_BUF(4);
3599                 READ32(len);
3600                 READ_BUF(len);
3601
3602                 /* skip uaddr string */
3603                 READ_BUF(4);
3604                 READ32(len);
3605                 READ_BUF(len);
3606                 return -NFSERR_CLID_INUSE;
3607         } else
3608                 return -nfs4_stat_to_errno(nfserr);
3609
3610         return 0;
3611 }
3612
3613 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3614 {
3615         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3616 }
3617
3618 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3619 {
3620         __be32 *p;
3621         int status;
3622
3623         status = decode_op_hdr(xdr, OP_WRITE);
3624         if (status)
3625                 return status;
3626
3627         READ_BUF(16);
3628         READ32(res->count);
3629         READ32(res->verf->committed);
3630         COPYMEM(res->verf->verifier, 8);
3631         return 0;
3632 }
3633
3634 static int decode_delegreturn(struct xdr_stream *xdr)
3635 {
3636         return decode_op_hdr(xdr, OP_DELEGRETURN);
3637 }
3638
3639 /*
3640  * Decode OPEN_DOWNGRADE response
3641  */
3642 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3643 {
3644         struct xdr_stream xdr;
3645         struct compound_hdr hdr;
3646         int status;
3647
3648         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3649         status = decode_compound_hdr(&xdr, &hdr);
3650         if (status)
3651                 goto out;
3652         status = decode_putfh(&xdr);
3653         if (status)
3654                 goto out;
3655         status = decode_open_downgrade(&xdr, res);
3656         if (status != 0)
3657                 goto out;
3658         decode_getfattr(&xdr, res->fattr, res->server);
3659 out:
3660         return status;
3661 }
3662
3663 /*
3664  * END OF "GENERIC" DECODE ROUTINES.
3665  */
3666
3667 /*
3668  * Decode ACCESS response
3669  */
3670 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3671 {
3672         struct xdr_stream xdr;
3673         struct compound_hdr hdr;
3674         int status;
3675
3676         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3677         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3678                 goto out;
3679         if ((status = decode_putfh(&xdr)) == 0)
3680                 status = decode_access(&xdr, res);
3681 out:
3682         return status;
3683 }
3684
3685 /*
3686  * Decode LOOKUP response
3687  */
3688 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3689 {
3690         struct xdr_stream xdr;
3691         struct compound_hdr hdr;
3692         int status;
3693
3694         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3695         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3696                 goto out;
3697         if ((status = decode_putfh(&xdr)) != 0)
3698                 goto out;
3699         if ((status = decode_lookup(&xdr)) != 0)
3700                 goto out;
3701         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3702                 goto out;
3703         status = decode_getfattr(&xdr, res->fattr, res->server);
3704 out:
3705         return status;
3706 }
3707
3708 /*
3709  * Decode LOOKUP_ROOT response
3710  */
3711 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3712 {
3713         struct xdr_stream xdr;
3714         struct compound_hdr hdr;
3715         int status;
3716
3717         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3718         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3719                 goto out;
3720         if ((status = decode_putrootfh(&xdr)) != 0)
3721                 goto out;
3722         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3723                 status = decode_getfattr(&xdr, res->fattr, res->server);
3724 out:
3725         return status;
3726 }
3727
3728 /*
3729  * Decode REMOVE response
3730  */
3731 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
3732 {
3733         struct xdr_stream xdr;
3734         struct compound_hdr hdr;
3735         int status;
3736
3737         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3738         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3739                 goto out;
3740         if ((status = decode_putfh(&xdr)) != 0)
3741                 goto out;
3742         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3743                 goto out;
3744         decode_getfattr(&xdr, res->dir_attr, res->server);
3745 out:
3746         return status;
3747 }
3748
3749 /*
3750  * Decode RENAME response
3751  */
3752 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3753 {
3754         struct xdr_stream xdr;
3755         struct compound_hdr hdr;
3756         int status;
3757
3758         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3759         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3760                 goto out;
3761         if ((status = decode_putfh(&xdr)) != 0)
3762                 goto out;
3763         if ((status = decode_savefh(&xdr)) != 0)
3764                 goto out;
3765         if ((status = decode_putfh(&xdr)) != 0)
3766                 goto out;
3767         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3768                 goto out;
3769         /* Current FH is target directory */
3770         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3771                 goto out;
3772         if ((status = decode_restorefh(&xdr)) != 0)
3773                 goto out;
3774         decode_getfattr(&xdr, res->old_fattr, res->server);
3775 out:
3776         return status;
3777 }
3778
3779 /*
3780  * Decode LINK response
3781  */
3782 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3783 {
3784         struct xdr_stream xdr;
3785         struct compound_hdr hdr;
3786         int status;
3787
3788         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3789         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3790                 goto out;
3791         if ((status = decode_putfh(&xdr)) != 0)
3792                 goto out;
3793         if ((status = decode_savefh(&xdr)) != 0)
3794                 goto out;
3795         if ((status = decode_putfh(&xdr)) != 0)
3796                 goto out;
3797         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3798                 goto out;
3799         /*
3800          * Note order: OP_LINK leaves the directory as the current
3801          *             filehandle.
3802          */
3803         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3804                 goto out;
3805         if ((status = decode_restorefh(&xdr)) != 0)
3806                 goto out;
3807         decode_getfattr(&xdr, res->fattr, res->server);
3808 out:
3809         return status;
3810 }
3811
3812 /*
3813  * Decode CREATE response
3814  */
3815 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3816 {
3817         struct xdr_stream xdr;
3818         struct compound_hdr hdr;
3819         int status;
3820
3821         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3822         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3823                 goto out;
3824         if ((status = decode_putfh(&xdr)) != 0)
3825                 goto out;
3826         if ((status = decode_savefh(&xdr)) != 0)
3827                 goto out;
3828         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3829                 goto out;
3830         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3831                 goto out;
3832         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3833                 goto out;
3834         if ((status = decode_restorefh(&xdr)) != 0)
3835                 goto out;
3836         decode_getfattr(&xdr, res->dir_fattr, res->server);
3837 out:
3838         return status;
3839 }
3840
3841 /*
3842  * Decode SYMLINK response
3843  */
3844 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3845 {
3846         return nfs4_xdr_dec_create(rqstp, p, res);
3847 }
3848
3849 /*
3850  * Decode GETATTR response
3851  */
3852 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3853 {
3854         struct xdr_stream xdr;
3855         struct compound_hdr hdr;
3856         int status;
3857
3858         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3859         status = decode_compound_hdr(&xdr, &hdr);
3860         if (status)
3861                 goto out;
3862         status = decode_putfh(&xdr);
3863         if (status)
3864                 goto out;
3865         status = decode_getfattr(&xdr, res->fattr, res->server);
3866 out:
3867         return status;
3868
3869 }
3870
3871 /*
3872  * Encode an SETACL request
3873  */
3874 static int
3875 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3876 {
3877         struct xdr_stream xdr;
3878         struct compound_hdr hdr = {
3879                 .nops   = 2,
3880         };
3881         int status;
3882
3883         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3884         encode_compound_hdr(&xdr, &hdr);
3885         status = encode_putfh(&xdr, args->fh);
3886         if (status)
3887                 goto out;
3888         status = encode_setacl(&xdr, args);
3889 out:
3890         return status;
3891 }
3892 /*
3893  * Decode SETACL response
3894  */
3895 static int
3896 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3897 {
3898         struct xdr_stream xdr;
3899         struct compound_hdr hdr;
3900         int status;
3901
3902         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3903         status = decode_compound_hdr(&xdr, &hdr);
3904         if (status)
3905                 goto out;
3906         status = decode_putfh(&xdr);
3907         if (status)
3908                 goto out;
3909         status = decode_setattr(&xdr, res);
3910 out:
3911         return status;
3912 }
3913
3914 /*
3915  * Decode GETACL response
3916  */
3917 static int
3918 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3919 {
3920         struct xdr_stream xdr;
3921         struct compound_hdr hdr;
3922         int status;
3923
3924         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3925         status = decode_compound_hdr(&xdr, &hdr);
3926         if (status)
3927                 goto out;
3928         status = decode_putfh(&xdr);
3929         if (status)
3930                 goto out;
3931         status = decode_getacl(&xdr, rqstp, acl_len);
3932
3933 out:
3934         return status;
3935 }
3936
3937 /*
3938  * Decode CLOSE response
3939  */
3940 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3941 {
3942         struct xdr_stream xdr;
3943         struct compound_hdr hdr;
3944         int status;
3945
3946         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3947         status = decode_compound_hdr(&xdr, &hdr);
3948         if (status)
3949                 goto out;
3950         status = decode_putfh(&xdr);
3951         if (status)
3952                 goto out;
3953         status = decode_close(&xdr, res);
3954         if (status != 0)
3955                 goto out;
3956         /*
3957          * Note: Server may do delete on close for this file
3958          *      in which case the getattr call will fail with
3959          *      an ESTALE error. Shouldn't be a problem,
3960          *      though, since fattr->valid will remain unset.
3961          */
3962         decode_getfattr(&xdr, res->fattr, res->server);
3963 out:
3964         return status;
3965 }
3966
3967 /*
3968  * Decode OPEN response
3969  */
3970 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
3971 {
3972         struct xdr_stream xdr;
3973         struct compound_hdr hdr;
3974         int status;
3975
3976         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3977         status = decode_compound_hdr(&xdr, &hdr);
3978         if (status)
3979                 goto out;
3980         status = decode_putfh(&xdr);
3981         if (status)
3982                 goto out;
3983         status = decode_savefh(&xdr);
3984         if (status)
3985                 goto out;
3986         status = decode_open(&xdr, res);
3987         if (status)
3988                 goto out;
3989         status = decode_getfh(&xdr, &res->fh);
3990         if (status)
3991                 goto out;
3992         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
3993                 goto out;
3994         if ((status = decode_restorefh(&xdr)) != 0)
3995                 goto out;
3996         decode_getfattr(&xdr, res->dir_attr, res->server);
3997 out:
3998         return status;
3999 }
4000
4001 /*
4002  * Decode OPEN_CONFIRM response
4003  */
4004 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4005 {
4006         struct xdr_stream xdr;
4007         struct compound_hdr hdr;
4008         int status;
4009
4010         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4011         status = decode_compound_hdr(&xdr, &hdr);
4012         if (status)
4013                 goto out;
4014         status = decode_putfh(&xdr);
4015         if (status)
4016                 goto out;
4017         status = decode_open_confirm(&xdr, res);
4018 out:
4019         return status;
4020 }
4021
4022 /*
4023  * Decode OPEN response
4024  */
4025 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4026 {
4027         struct xdr_stream xdr;
4028         struct compound_hdr hdr;
4029         int status;
4030
4031         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4032         status = decode_compound_hdr(&xdr, &hdr);
4033         if (status)
4034                 goto out;
4035         status = decode_putfh(&xdr);
4036         if (status)
4037                 goto out;
4038         status = decode_open(&xdr, res);
4039         if (status)
4040                 goto out;
4041         decode_getfattr(&xdr, res->f_attr, res->server);
4042 out:
4043         return status;
4044 }
4045
4046 /*
4047  * Decode SETATTR response
4048  */
4049 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4050 {
4051         struct xdr_stream xdr;
4052         struct compound_hdr hdr;
4053         int status;
4054
4055         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4056         status = decode_compound_hdr(&xdr, &hdr);
4057         if (status)
4058                 goto out;
4059         status = decode_putfh(&xdr);
4060         if (status)
4061                 goto out;
4062         status = decode_setattr(&xdr, res);
4063         if (status)
4064                 goto out;
4065         status = decode_getfattr(&xdr, res->fattr, res->server);
4066         if (status == NFS4ERR_DELAY)
4067                 status = 0;
4068 out:
4069         return status;
4070 }
4071
4072 /*
4073  * Decode LOCK response
4074  */
4075 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4076 {
4077         struct xdr_stream xdr;
4078         struct compound_hdr hdr;
4079         int status;
4080
4081         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4082         status = decode_compound_hdr(&xdr, &hdr);
4083         if (status)
4084                 goto out;
4085         status = decode_putfh(&xdr);
4086         if (status)
4087                 goto out;
4088         status = decode_lock(&xdr, res);
4089 out:
4090         return status;
4091 }
4092
4093 /*
4094  * Decode LOCKT response
4095  */
4096 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4097 {
4098         struct xdr_stream xdr;
4099         struct compound_hdr hdr;
4100         int status;
4101
4102         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4103         status = decode_compound_hdr(&xdr, &hdr);
4104         if (status)
4105                 goto out;
4106         status = decode_putfh(&xdr);
4107         if (status)
4108                 goto out;
4109         status = decode_lockt(&xdr, res);
4110 out:
4111         return status;
4112 }
4113
4114 /*
4115  * Decode LOCKU response
4116  */
4117 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4118 {
4119         struct xdr_stream xdr;
4120         struct compound_hdr hdr;
4121         int status;
4122
4123         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4124         status = decode_compound_hdr(&xdr, &hdr);
4125         if (status)
4126                 goto out;
4127         status = decode_putfh(&xdr);
4128         if (status)
4129                 goto out;
4130         status = decode_locku(&xdr, res);
4131 out:
4132         return status;
4133 }
4134
4135 /*
4136  * Decode READLINK response
4137  */
4138 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4139 {
4140         struct xdr_stream xdr;
4141         struct compound_hdr hdr;
4142         int status;
4143
4144         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4145         status = decode_compound_hdr(&xdr, &hdr);
4146         if (status)
4147                 goto out;
4148         status = decode_putfh(&xdr);
4149         if (status)
4150                 goto out;
4151         status = decode_readlink(&xdr, rqstp);
4152 out:
4153         return status;
4154 }
4155
4156 /*
4157  * Decode READDIR response
4158  */
4159 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4160 {
4161         struct xdr_stream xdr;
4162         struct compound_hdr hdr;
4163         int status;
4164
4165         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4166         status = decode_compound_hdr(&xdr, &hdr);
4167         if (status)
4168                 goto out;
4169         status = decode_putfh(&xdr);
4170         if (status)
4171                 goto out;
4172         status = decode_readdir(&xdr, rqstp, res);
4173 out:
4174         return status;
4175 }
4176
4177 /*
4178  * Decode Read response
4179  */
4180 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4181 {
4182         struct xdr_stream xdr;
4183         struct compound_hdr hdr;
4184         int status;
4185
4186         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4187         status = decode_compound_hdr(&xdr, &hdr);
4188         if (status)
4189                 goto out;
4190         status = decode_putfh(&xdr);
4191         if (status)
4192                 goto out;
4193         status = decode_read(&xdr, rqstp, res);
4194         if (!status)
4195                 status = res->count;
4196 out:
4197         return status;
4198 }
4199
4200 /*
4201  * Decode WRITE response
4202  */
4203 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4204 {
4205         struct xdr_stream xdr;
4206         struct compound_hdr hdr;
4207         int status;
4208
4209         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4210         status = decode_compound_hdr(&xdr, &hdr);
4211         if (status)
4212                 goto out;
4213         status = decode_putfh(&xdr);
4214         if (status)
4215                 goto out;
4216         status = decode_write(&xdr, res);
4217         if (status)
4218                 goto out;
4219         decode_getfattr(&xdr, res->fattr, res->server);
4220         if (!status)
4221                 status = res->count;
4222 out:
4223         return status;
4224 }
4225
4226 /*
4227  * Decode COMMIT response
4228  */
4229 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4230 {
4231         struct xdr_stream xdr;
4232         struct compound_hdr hdr;
4233         int status;
4234
4235         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4236         status = decode_compound_hdr(&xdr, &hdr);
4237         if (status)
4238                 goto out;
4239         status = decode_putfh(&xdr);
4240         if (status)
4241                 goto out;
4242         status = decode_commit(&xdr, res);
4243         if (status)
4244                 goto out;
4245         decode_getfattr(&xdr, res->fattr, res->server);
4246 out:
4247         return status;
4248 }
4249
4250 /*
4251  * FSINFO request
4252  */
4253 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4254 {
4255         struct xdr_stream xdr;
4256         struct compound_hdr hdr;
4257         int status;
4258
4259         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4260         status = decode_compound_hdr(&xdr, &hdr);
4261         if (!status)
4262                 status = decode_putfh(&xdr);
4263         if (!status)
4264                 status = decode_fsinfo(&xdr, fsinfo);
4265         if (!status)
4266                 status = -nfs4_stat_to_errno(hdr.status);
4267         return status;
4268 }
4269
4270 /*
4271  * PATHCONF request
4272  */
4273 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4274 {
4275         struct xdr_stream xdr;
4276         struct compound_hdr hdr;
4277         int status;
4278
4279         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4280         status = decode_compound_hdr(&xdr, &hdr);
4281         if (!status)
4282                 status = decode_putfh(&xdr);
4283         if (!status)
4284                 status = decode_pathconf(&xdr, pathconf);
4285         return status;
4286 }
4287
4288 /*
4289  * STATFS request
4290  */
4291 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4292 {
4293         struct xdr_stream xdr;
4294         struct compound_hdr hdr;
4295         int status;
4296
4297         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4298         status = decode_compound_hdr(&xdr, &hdr);
4299         if (!status)
4300                 status = decode_putfh(&xdr);
4301         if (!status)
4302                 status = decode_statfs(&xdr, fsstat);
4303         return status;
4304 }
4305
4306 /*
4307  * GETATTR_BITMAP request
4308  */
4309 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4310 {
4311         struct xdr_stream xdr;
4312         struct compound_hdr hdr;
4313         int status;
4314
4315         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4316         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4317                 goto out;
4318         if ((status = decode_putfh(&xdr)) != 0)
4319                 goto out;
4320         status = decode_server_caps(&xdr, res);
4321 out:
4322         return status;
4323 }
4324
4325 /*
4326  * Decode RENEW response
4327  */
4328 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4329 {
4330         struct xdr_stream xdr;
4331         struct compound_hdr hdr;
4332         int status;
4333
4334         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4335         status = decode_compound_hdr(&xdr, &hdr);
4336         if (!status)
4337                 status = decode_renew(&xdr);
4338         return status;
4339 }
4340
4341 /*
4342  * a SETCLIENTID request
4343  */
4344 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4345                 struct nfs_client *clp)
4346 {
4347         struct xdr_stream xdr;
4348         struct compound_hdr hdr;
4349         int status;
4350
4351         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4352         status = decode_compound_hdr(&xdr, &hdr);
4353         if (!status)
4354                 status = decode_setclientid(&xdr, clp);
4355         if (!status)
4356                 status = -nfs4_stat_to_errno(hdr.status);
4357         return status;
4358 }
4359
4360 /*
4361  * a SETCLIENTID_CONFIRM request
4362  */
4363 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4364 {
4365         struct xdr_stream xdr;
4366         struct compound_hdr hdr;
4367         int status;
4368
4369         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4370         status = decode_compound_hdr(&xdr, &hdr);
4371         if (!status)
4372                 status = decode_setclientid_confirm(&xdr);
4373         if (!status)
4374                 status = decode_putrootfh(&xdr);
4375         if (!status)
4376                 status = decode_fsinfo(&xdr, fsinfo);
4377         if (!status)
4378                 status = -nfs4_stat_to_errno(hdr.status);
4379         return status;
4380 }
4381
4382 /*
4383  * DELEGRETURN request
4384  */
4385 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4386 {
4387         struct xdr_stream xdr;
4388         struct compound_hdr hdr;
4389         int status;
4390
4391         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4392         status = decode_compound_hdr(&xdr, &hdr);
4393         if (status != 0)
4394                 goto out;
4395         status = decode_putfh(&xdr);
4396         if (status != 0)
4397                 goto out;
4398         status = decode_delegreturn(&xdr);
4399         decode_getfattr(&xdr, res->fattr, res->server);
4400 out:
4401         return status;
4402 }
4403
4404 /*
4405  * FS_LOCATIONS request
4406  */
4407 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4408 {
4409         struct xdr_stream xdr;
4410         struct compound_hdr hdr;
4411         int status;
4412
4413         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4414         status = decode_compound_hdr(&xdr, &hdr);
4415         if (status != 0)
4416                 goto out;
4417         if ((status = decode_putfh(&xdr)) != 0)
4418                 goto out;
4419         if ((status = decode_lookup(&xdr)) != 0)
4420                 goto out;
4421         xdr_enter_page(&xdr, PAGE_SIZE);
4422         status = decode_getfattr(&xdr, &res->fattr, res->server);
4423 out:
4424         return status;
4425 }
4426
4427 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4428 {
4429         uint32_t bitmap[2] = {0};
4430         uint32_t len;
4431
4432         if (!*p++) {
4433                 if (!*p)
4434                         return ERR_PTR(-EAGAIN);
4435                 entry->eof = 1;
4436                 return ERR_PTR(-EBADCOOKIE);
4437         }
4438
4439         entry->prev_cookie = entry->cookie;
4440         p = xdr_decode_hyper(p, &entry->cookie);
4441         entry->len = ntohl(*p++);
4442         entry->name = (const char *) p;
4443         p += XDR_QUADLEN(entry->len);
4444
4445         /*
4446          * In case the server doesn't return an inode number,
4447          * we fake one here.  (We don't use inode number 0,
4448          * since glibc seems to choke on it...)
4449          */
4450         entry->ino = 1;
4451
4452         len = ntohl(*p++);              /* bitmap length */
4453         if (len-- > 0) {
4454                 bitmap[0] = ntohl(*p++);
4455                 if (len-- > 0) {
4456                         bitmap[1] = ntohl(*p++);
4457                         p += len;
4458                 }
4459         }
4460         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4461         if (len > 0) {
4462                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4463                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4464                         /* Ignore the return value of rdattr_error for now */
4465                         p++;
4466                         len--;
4467                 }
4468                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4469                         xdr_decode_hyper(p, &entry->ino);
4470                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4471                         xdr_decode_hyper(p, &entry->ino);
4472                 p += len;
4473         }
4474
4475         entry->eof = !p[0] && p[1];
4476         return p;
4477 }
4478
4479 /*
4480  * We need to translate between nfs status return values and
4481  * the local errno values which may not be the same.
4482  */
4483 static struct {
4484         int stat;
4485         int errno;
4486 } nfs_errtbl[] = {
4487         { NFS4_OK,              0               },
4488         { NFS4ERR_PERM,         EPERM           },
4489         { NFS4ERR_NOENT,        ENOENT          },
4490         { NFS4ERR_IO,           errno_NFSERR_IO },
4491         { NFS4ERR_NXIO,         ENXIO           },
4492         { NFS4ERR_ACCESS,       EACCES          },
4493         { NFS4ERR_EXIST,        EEXIST          },
4494         { NFS4ERR_XDEV,         EXDEV           },
4495         { NFS4ERR_NOTDIR,       ENOTDIR         },
4496         { NFS4ERR_ISDIR,        EISDIR          },
4497         { NFS4ERR_INVAL,        EINVAL          },
4498         { NFS4ERR_FBIG,         EFBIG           },
4499         { NFS4ERR_NOSPC,        ENOSPC          },
4500         { NFS4ERR_ROFS,         EROFS           },
4501         { NFS4ERR_MLINK,        EMLINK          },
4502         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4503         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4504         { NFS4ERR_DQUOT,        EDQUOT          },
4505         { NFS4ERR_STALE,        ESTALE          },
4506         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4507         { NFS4ERR_BADOWNER,     EINVAL          },
4508         { NFS4ERR_BADNAME,      EINVAL          },
4509         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4510         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4511         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4512         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4513         { NFS4ERR_BADTYPE,      EBADTYPE        },
4514         { NFS4ERR_LOCKED,       EAGAIN          },
4515         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4516         { NFS4ERR_SYMLINK,      ELOOP           },
4517         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4518         { NFS4ERR_DEADLOCK,     EDEADLK         },
4519         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4520                                                     * to be handled by a
4521                                                     * middle-layer.
4522                                                     */
4523         { -1,                   EIO             }
4524 };
4525
4526 /*
4527  * Convert an NFS error code to a local one.
4528  * This one is used jointly by NFSv2 and NFSv3.
4529  */
4530 static int
4531 nfs4_stat_to_errno(int stat)
4532 {
4533         int i;
4534         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4535                 if (nfs_errtbl[i].stat == stat)
4536                         return nfs_errtbl[i].errno;
4537         }
4538         if (stat <= 10000 || stat > 10100) {
4539                 /* The server is looney tunes. */
4540                 return ESERVERFAULT;
4541         }
4542         /* If we cannot translate the error, the recovery routines should
4543          * handle it.
4544          * Note: remaining NFSv4 error codes have values > 10000, so should
4545          * not conflict with native Linux error codes.
4546          */
4547         return stat;
4548 }
4549
4550 #define PROC(proc, argtype, restype)                            \
4551 [NFSPROC4_CLNT_##proc] = {                                      \
4552         .p_proc   = NFSPROC4_COMPOUND,                          \
4553         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4554         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4555         .p_arglen = NFS4_##argtype##_sz,                        \
4556         .p_replen = NFS4_##restype##_sz,                        \
4557         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4558         .p_name   = #proc,                                      \
4559     }
4560
4561 struct rpc_procinfo     nfs4_procedures[] = {
4562   PROC(READ,            enc_read,       dec_read),
4563   PROC(WRITE,           enc_write,      dec_write),
4564   PROC(COMMIT,          enc_commit,     dec_commit),
4565   PROC(OPEN,            enc_open,       dec_open),
4566   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4567   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4568   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4569   PROC(CLOSE,           enc_close,      dec_close),
4570   PROC(SETATTR,         enc_setattr,    dec_setattr),
4571   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4572   PROC(RENEW,           enc_renew,      dec_renew),
4573   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4574   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4575   PROC(LOCK,            enc_lock,       dec_lock),
4576   PROC(LOCKT,           enc_lockt,      dec_lockt),
4577   PROC(LOCKU,           enc_locku,      dec_locku),
4578   PROC(ACCESS,          enc_access,     dec_access),
4579   PROC(GETATTR,         enc_getattr,    dec_getattr),
4580   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4581   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4582   PROC(REMOVE,          enc_remove,     dec_remove),
4583   PROC(RENAME,          enc_rename,     dec_rename),
4584   PROC(LINK,            enc_link,       dec_link),
4585   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4586   PROC(CREATE,          enc_create,     dec_create),
4587   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4588   PROC(STATFS,          enc_statfs,     dec_statfs),
4589   PROC(READLINK,        enc_readlink,   dec_readlink),
4590   PROC(READDIR,         enc_readdir,    dec_readdir),
4591   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4592   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4593   PROC(GETACL,          enc_getacl,     dec_getacl),
4594   PROC(SETACL,          enc_setacl,     dec_setacl),
4595   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4596 };
4597
4598 struct rpc_version              nfs_version4 = {
4599         .number                 = 4,
4600         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4601         .procs                  = nfs4_procedures
4602 };
4603
4604 /*
4605  * Local variables:
4606  *  c-basic-offset: 8
4607  * End:
4608  */