err.no Git - linux-2.6/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 1)
  74 #define lock_owner_id_maxsz     (1 + 1)
  75 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define op_encode_hdr_maxsz     (1)
  78 #define op_decode_hdr_maxsz     (2)
  79 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  80                                 (NFS4_FHSIZE >> 2))
  81 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  82 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  83 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  84 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  85 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  86                                 ((3+NFS4_FHSIZE) >> 2))
  87 #define nfs4_fattr_bitmap_maxsz 3
  88 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  89 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  90 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  91 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  92 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  93 /* This is based on getfattr, which uses the most attributes: */
  94 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  95                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
  96 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
  97                                 nfs4_fattr_value_maxsz)
  98 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
  99 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 100 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 101 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 102 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 103 #define encode_fsinfo_maxsz     (op_encode_hdr_maxsz + 2)
 104 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 105 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 106 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 107 #define encode_setclientid_maxsz \
 108                                 (op_encode_hdr_maxsz + \
 109                                 4 /*server->ip_addr*/ + \
 110                                 1 /*Netid*/ + \
 111                                 6 /*uaddr*/ + \
 112                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 113 #define decode_setclientid_maxsz \
 114                                 (op_decode_hdr_maxsz + \
 115                                 2 + \
 116                                 1024) /* large value for CLID_INUSE */
 117 #define encode_setclientid_confirm_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 120 #define decode_setclientid_confirm_maxsz \
 121                                 (op_decode_hdr_maxsz)
 122 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + \
 123                                 1 + ((3 + NFS4_FHSIZE) >> 2))
 124 #define encode_share_access_maxsz \
 125                                 (2)
 126 #define encode_createmode_maxsz (1 + nfs4_fattr_maxsz)
 127 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 128 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 129 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 130                                 2 + encode_share_access_maxsz + 2 + \
 131                                 open_owner_id_maxsz + \
 132                                 encode_opentype_maxsz + \
 133                                 encode_claim_null_maxsz)
 134 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 135 #define decode_delegation_maxsz (1 + XDR_QUADLEN(NFS4_STATEID_SIZE) + 1 + \
 136                                 decode_ace_maxsz)
 137 #define decode_change_info_maxsz        (5)
 138 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 139                                 XDR_QUADLEN(NFS4_STATEID_SIZE) + \
 140                                 decode_change_info_maxsz + 1 + \
 141                                 nfs4_fattr_bitmap_maxsz + \
 142                                 decode_delegation_maxsz)
 143 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 144                                 nfs4_name_maxsz)
 145 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 146                                 2 * nfs4_name_maxsz)
 147 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 148 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 149                                 nfs4_name_maxsz)
 150 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 151 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 152                                 1 + nfs4_name_maxsz + \
 153                                 1 + \
 154                                 nfs4_fattr_maxsz)
 155 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 156 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 157                                 2 + nfs4_name_maxsz + \
 158                                 nfs4_fattr_maxsz)
 159 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 160                                 decode_change_info_maxsz + \
 161                                 nfs4_fattr_bitmap_maxsz)
 162 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 163 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 164 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 165 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 166 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 167                                 encode_putfh_maxsz + \
 168                                 op_encode_hdr_maxsz + 7)
 169 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 170                                 decode_putfh_maxsz + \
 171                                 op_decode_hdr_maxsz + 2)
 172 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 173                                 encode_putfh_maxsz + \
 174                                 op_encode_hdr_maxsz)
 175 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 176                                 decode_putfh_maxsz + \
 177                                 op_decode_hdr_maxsz)
 178 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 179                                 encode_putfh_maxsz + \
 180                                 op_encode_hdr_maxsz + 9)
 181 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 182                                 decode_putfh_maxsz + \
 183                                 op_decode_hdr_maxsz + 2)
 184 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 185                                 encode_putfh_maxsz + \
 186                                 op_encode_hdr_maxsz + 8 + \
 187                                 encode_getattr_maxsz)
 188 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 189                                 decode_putfh_maxsz + \
 190                                 op_decode_hdr_maxsz + 4 + \
 191                                 decode_getattr_maxsz)
 192 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 193                                 encode_putfh_maxsz + \
 194                                 op_encode_hdr_maxsz + 3 + \
 195                                 encode_getattr_maxsz)
 196 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 197                                 decode_putfh_maxsz + \
 198                                 op_decode_hdr_maxsz + 2 + \
 199                                 decode_getattr_maxsz)
 200 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 201                                 encode_putfh_maxsz + \
 202                                 encode_savefh_maxsz + \
 203                                 encode_open_maxsz + \
 204                                 encode_getfh_maxsz + \
 205                                 encode_getattr_maxsz + \
 206                                 encode_restorefh_maxsz + \
 207                                 encode_getattr_maxsz)
 208 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 209                                 decode_putfh_maxsz + \
 210                                 decode_savefh_maxsz + \
 211                                 decode_open_maxsz + \
 212                                 decode_getfh_maxsz + \
 213                                 decode_getattr_maxsz + \
 214                                 decode_restorefh_maxsz + \
 215                                 decode_getattr_maxsz)
 216 #define NFS4_enc_open_confirm_sz      \
 217                                 (compound_encode_hdr_maxsz + \
 218                                 encode_putfh_maxsz + \
 219                                 op_encode_hdr_maxsz + 5)
 220 #define NFS4_dec_open_confirm_sz        (compound_decode_hdr_maxsz + \
 221                                         decode_putfh_maxsz + \
 222                                         op_decode_hdr_maxsz + 4)
 223 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 224                                         encode_putfh_maxsz + \
 225                                         encode_open_maxsz + \
 226                                         encode_getattr_maxsz)
 227 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 228                                         decode_putfh_maxsz + \
 229                                         decode_open_maxsz + \
 230                                         decode_getattr_maxsz)
 231 #define NFS4_enc_open_downgrade_sz \
 232                                 (compound_encode_hdr_maxsz + \
 233                                 encode_putfh_maxsz + \
 234                                 op_encode_hdr_maxsz + 7 + \
 235                                 encode_getattr_maxsz)
 236 #define NFS4_dec_open_downgrade_sz \
 237                                 (compound_decode_hdr_maxsz + \
 238                                 decode_putfh_maxsz + \
 239                                 op_decode_hdr_maxsz + 4 + \
 240                                 decode_getattr_maxsz)
 241 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 242                                 encode_putfh_maxsz + \
 243                                 op_encode_hdr_maxsz + 5 + \
 244                                 encode_getattr_maxsz)
 245 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 246                                 decode_putfh_maxsz + \
 247                                 op_decode_hdr_maxsz + 4 + \
 248                                 decode_getattr_maxsz)
 249 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 250                                 encode_putfh_maxsz + \
 251                                 op_encode_hdr_maxsz + 4 + \
 252                                 nfs4_fattr_maxsz + \
 253                                 encode_getattr_maxsz)
 254 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 op_decode_hdr_maxsz + 3 + \
 257                                 nfs4_fattr_maxsz)
 258 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 259                                 encode_putfh_maxsz + \
 260                                 encode_fsinfo_maxsz)
 261 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 262                                 decode_putfh_maxsz + \
 263                                 decode_fsinfo_maxsz)
 264 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 265                                 encode_renew_maxsz)
 266 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 267                                 decode_renew_maxsz)
 268 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 269                                 encode_setclientid_maxsz)
 270 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 271                                 decode_setclientid_maxsz)
 272 #define NFS4_enc_setclientid_confirm_sz \
 273                                 (compound_encode_hdr_maxsz + \
 274                                 encode_setclientid_confirm_maxsz + \
 275                                 encode_putrootfh_maxsz + \
 276                                 encode_fsinfo_maxsz)
 277 #define NFS4_dec_setclientid_confirm_sz \
 278                                 (compound_decode_hdr_maxsz + \
 279                                 decode_setclientid_confirm_maxsz + \
 280                                 decode_putrootfh_maxsz + \
 281                                 decode_fsinfo_maxsz)
 282 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 283                                 encode_putfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 op_encode_hdr_maxsz + \
 286                                 1 + 1 + 2 + 2 + \
 287                                 1 + 4 + 1 + 2 + \
 288                                 lock_owner_id_maxsz)
 289 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 290                                 decode_putfh_maxsz + \
 291                                 decode_getattr_maxsz + \
 292                                 op_decode_hdr_maxsz + \
 293                                 2 + 2 + 1 + 2 + \
 294                                 lock_owner_id_maxsz)
 295 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 296                                 encode_putfh_maxsz + \
 297                                 encode_getattr_maxsz + \
 298                                 op_encode_hdr_maxsz + \
 299                                 1 + 2 + 2 + 2 + \
 300                                 lock_owner_id_maxsz)
 301 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 302 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 303                                 encode_putfh_maxsz + \
 304                                 encode_getattr_maxsz + \
 305                                 op_encode_hdr_maxsz + \
 306                                 1 + 1 + 4 + 2 + 2)
 307 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 308                                 decode_putfh_maxsz + \
 309                                 decode_getattr_maxsz + \
 310                                 op_decode_hdr_maxsz + 4)
 311 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 op_encode_hdr_maxsz + 1)
 314 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 315                                 decode_putfh_maxsz + \
 316                                 op_decode_hdr_maxsz + 2)
 317 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 318                                 encode_putfh_maxsz + \
 319                                 encode_getattr_maxsz)
 320 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 321                                 decode_putfh_maxsz + \
 322                                 decode_getattr_maxsz)
 323 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 324                                 encode_putfh_maxsz + \
 325                                 encode_lookup_maxsz + \
 326                                 encode_getattr_maxsz + \
 327                                 encode_getfh_maxsz)
 328 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 329                                 decode_putfh_maxsz + \
 330                                 op_decode_hdr_maxsz + \
 331                                 decode_getattr_maxsz + \
 332                                 decode_getfh_maxsz)
 333 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 334                                 encode_putrootfh_maxsz + \
 335                                 encode_getattr_maxsz + \
 336                                 encode_getfh_maxsz)
 337 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 338                                 decode_putrootfh_maxsz + \
 339                                 decode_getattr_maxsz + \
 340                                 decode_getfh_maxsz)
 341 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 342                                 encode_putfh_maxsz + \
 343                                 encode_remove_maxsz + \
 344                                 encode_getattr_maxsz)
 345 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 346                                 decode_putfh_maxsz + \
 347                                 op_decode_hdr_maxsz + 5 + \
 348                                 decode_getattr_maxsz)
 349 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 350                                 encode_putfh_maxsz + \
 351                                 encode_savefh_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_rename_maxsz + \
 354                                 encode_getattr_maxsz + \
 355                                 encode_restorefh_maxsz + \
 356                                 encode_getattr_maxsz)
 357 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 358                                 decode_putfh_maxsz + \
 359                                 decode_savefh_maxsz + \
 360                                 decode_putfh_maxsz + \
 361                                 decode_rename_maxsz + \
 362                                 decode_getattr_maxsz + \
 363                                 decode_restorefh_maxsz + \
 364                                 decode_getattr_maxsz)
 365 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_savefh_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_link_maxsz + \
 370                                 decode_getattr_maxsz + \
 371                                 encode_restorefh_maxsz + \
 372                                 decode_getattr_maxsz)
 373 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 374                                 decode_putfh_maxsz + \
 375                                 decode_savefh_maxsz + \
 376                                 decode_putfh_maxsz + \
 377                                 decode_link_maxsz + \
 378                                 decode_getattr_maxsz + \
 379                                 decode_restorefh_maxsz + \
 380                                 decode_getattr_maxsz)
 381 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 382                                 encode_putfh_maxsz + \
 383                                 encode_symlink_maxsz + \
 384                                 encode_getattr_maxsz + \
 385                                 encode_getfh_maxsz)
 386 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 decode_symlink_maxsz + \
 389                                 decode_getattr_maxsz + \
 390                                 decode_getfh_maxsz)
 391 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 392                                 encode_putfh_maxsz + \
 393                                 encode_savefh_maxsz + \
 394                                 encode_create_maxsz + \
 395                                 encode_getfh_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_restorefh_maxsz + \
 398                                 encode_getattr_maxsz)
 399 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 400                                 decode_putfh_maxsz + \
 401                                 decode_savefh_maxsz + \
 402                                 decode_create_maxsz + \
 403                                 decode_getfh_maxsz + \
 404                                 decode_getattr_maxsz + \
 405                                 decode_restorefh_maxsz + \
 406                                 decode_getattr_maxsz)
 407 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 408                                 encode_putfh_maxsz + \
 409                                 encode_getattr_maxsz)
 410 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 411                                 decode_putfh_maxsz + \
 412                                 decode_getattr_maxsz)
 413 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 414                                 encode_putfh_maxsz + \
 415                                 encode_getattr_maxsz)
 416 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 417                                 decode_putfh_maxsz + \
 418                                 op_decode_hdr_maxsz + 12)
 419 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_getattr_maxsz)
 422 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 423                                 decode_putfh_maxsz + \
 424                                 decode_getattr_maxsz)
 425 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 426                                 encode_putfh_maxsz + \
 427                                 encode_delegreturn_maxsz + \
 428                                 encode_getattr_maxsz)
 429 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 430                                 decode_delegreturn_maxsz + \
 431                                 decode_getattr_maxsz)
 432 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 433                                 encode_putfh_maxsz + \
 434                                 encode_getattr_maxsz)
 435 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 436                                 decode_putfh_maxsz + \
 437                                 op_decode_hdr_maxsz + \
 438                                 nfs4_fattr_bitmap_maxsz + 1)
 439 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 op_encode_hdr_maxsz + 4 + \
 442                                 nfs4_fattr_bitmap_maxsz + 1)
 443 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 446 #define NFS4_enc_fs_locations_sz \
 447                                 (compound_encode_hdr_maxsz + \
 448                                  encode_putfh_maxsz + \
 449                                  encode_getattr_maxsz)
 450 #define NFS4_dec_fs_locations_sz \
 451                                 (compound_decode_hdr_maxsz + \
 452                                  decode_putfh_maxsz + \
 453                                  op_decode_hdr_maxsz + \
 454                                  nfs4_fattr_bitmap_maxsz)
 455
 456 static struct {
 457         unsigned int    mode;
 458         unsigned int    nfs2type;
 459 } nfs_type2fmt[] = {
 460         { 0,            NFNON        },
 461         { S_IFREG,      NFREG        },
 462         { S_IFDIR,      NFDIR        },
 463         { S_IFBLK,      NFBLK        },
 464         { S_IFCHR,      NFCHR        },
 465         { S_IFLNK,      NFLNK        },
 466         { S_IFSOCK,     NFSOCK       },
 467         { S_IFIFO,      NFFIFO       },
 468         { 0,            NFNON        },
 469         { 0,            NFNON        },
 470 };
 471
 472 struct compound_hdr {
 473         int32_t         status;
 474         uint32_t        nops;
 475         uint32_t        taglen;
 476         char *          tag;
 477 };
 478
 479 /*
 480  * START OF "GENERIC" ENCODE ROUTINES.
 481  *   These may look a little ugly since they are imported from a "generic"
 482  * set of XDR encode/decode routines which are intended to be shared by
 483  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 484  *
 485  * If the pain of reading these is too great, it should be a straightforward
 486  * task to translate them into Linux-specific versions which are more
 487  * consistent with the style used in NFSv2/v3...
 488  */
 489 #define WRITE32(n)               *p++ = htonl(n)
 490 #define WRITE64(n)               do {                           \
 491         *p++ = htonl((uint32_t)((n) >> 32));                            \
 492         *p++ = htonl((uint32_t)(n));                                    \
 493 } while (0)
 494 #define WRITEMEM(ptr,nbytes)     do {                           \
 495         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 496 } while (0)
 497
 498 #define RESERVE_SPACE(nbytes)   do {                            \
 499         p = xdr_reserve_space(xdr, nbytes);                     \
 500         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 501         BUG_ON(!p);                                             \
 502 } while (0)
 503
 504 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 505 {
 506         __be32 *p;
 507
 508         p = xdr_reserve_space(xdr, 4 + len);
 509         BUG_ON(p == NULL);
 510         xdr_encode_opaque(p, str, len);
 511 }
 512
 513 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 514 {
 515         __be32 *p;
 516
 517         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 518         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 519         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 520         WRITE32(hdr->taglen);
 521         WRITEMEM(hdr->tag, hdr->taglen);
 522         WRITE32(NFS4_MINOR_VERSION);
 523         WRITE32(hdr->nops);
 524         return 0;
 525 }
 526
 527 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 528 {
 529         __be32 *p;
 530
 531         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 532         BUG_ON(p == NULL);
 533         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 534 }
 535
 536 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 537 {
 538         char owner_name[IDMAP_NAMESZ];
 539         char owner_group[IDMAP_NAMESZ];
 540         int owner_namelen = 0;
 541         int owner_grouplen = 0;
 542         __be32 *p;
 543         __be32 *q;
 544         int len;
 545         uint32_t bmval0 = 0;
 546         uint32_t bmval1 = 0;
 547         int status;
 548
 549         /*
 550          * We reserve enough space to write the entire attribute buffer at once.
 551          * In the worst-case, this would be
 552          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 553          *          = 36 bytes, plus any contribution from variable-length fields
 554          *            such as owner/group.
 555          */
 556         len = 16;
 557
 558         /* Sigh */
 559         if (iap->ia_valid & ATTR_SIZE)
 560                 len += 8;
 561         if (iap->ia_valid & ATTR_MODE)
 562                 len += 4;
 563         if (iap->ia_valid & ATTR_UID) {
 564                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 565                 if (owner_namelen < 0) {
 566                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 567                                iap->ia_uid);
 568                         /* XXX */
 569                         strcpy(owner_name, "nobody");
 570                         owner_namelen = sizeof("nobody") - 1;
 571                         /* goto out; */
 572                 }
 573                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 574         }
 575         if (iap->ia_valid & ATTR_GID) {
 576                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 577                 if (owner_grouplen < 0) {
 578                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 579                                iap->ia_gid);
 580                         strcpy(owner_group, "nobody");
 581                         owner_grouplen = sizeof("nobody") - 1;
 582                         /* goto out; */
 583                 }
 584                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 585         }
 586         if (iap->ia_valid & ATTR_ATIME_SET)
 587                 len += 16;
 588         else if (iap->ia_valid & ATTR_ATIME)
 589                 len += 4;
 590         if (iap->ia_valid & ATTR_MTIME_SET)
 591                 len += 16;
 592         else if (iap->ia_valid & ATTR_MTIME)
 593                 len += 4;
 594         RESERVE_SPACE(len);
 595
 596         /*
 597          * We write the bitmap length now, but leave the bitmap and the attribute
 598          * buffer length to be backfilled at the end of this routine.
 599          */
 600         WRITE32(2);
 601         q = p;
 602         p += 3;
 603
 604         if (iap->ia_valid & ATTR_SIZE) {
 605                 bmval0 |= FATTR4_WORD0_SIZE;
 606                 WRITE64(iap->ia_size);
 607         }
 608         if (iap->ia_valid & ATTR_MODE) {
 609                 bmval1 |= FATTR4_WORD1_MODE;
 610                 WRITE32(iap->ia_mode & S_IALLUGO);
 611         }
 612         if (iap->ia_valid & ATTR_UID) {
 613                 bmval1 |= FATTR4_WORD1_OWNER;
 614                 WRITE32(owner_namelen);
 615                 WRITEMEM(owner_name, owner_namelen);
 616         }
 617         if (iap->ia_valid & ATTR_GID) {
 618                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 619                 WRITE32(owner_grouplen);
 620                 WRITEMEM(owner_group, owner_grouplen);
 621         }
 622         if (iap->ia_valid & ATTR_ATIME_SET) {
 623                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 624                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 625                 WRITE32(0);
 626                 WRITE32(iap->ia_mtime.tv_sec);
 627                 WRITE32(iap->ia_mtime.tv_nsec);
 628         }
 629         else if (iap->ia_valid & ATTR_ATIME) {
 630                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 631                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 632         }
 633         if (iap->ia_valid & ATTR_MTIME_SET) {
 634                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 635                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 636                 WRITE32(0);
 637                 WRITE32(iap->ia_mtime.tv_sec);
 638                 WRITE32(iap->ia_mtime.tv_nsec);
 639         }
 640         else if (iap->ia_valid & ATTR_MTIME) {
 641                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 642                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 643         }
 644
 645         /*
 646          * Now we backfill the bitmap and the attribute buffer length.
 647          */
 648         if (len != ((char *)p - (char *)q) + 4) {
 649                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 650                                 len, ((char *)p - (char *)q) + 4);
 651                 BUG();
 652         }
 653         len = (char *)p - (char *)q - 12;
 654         *q++ = htonl(bmval0);
 655         *q++ = htonl(bmval1);
 656         *q++ = htonl(len);
 657
 658         status = 0;
 659 /* out: */
 660         return status;
 661 }
 662
 663 static int encode_access(struct xdr_stream *xdr, u32 access)
 664 {
 665         __be32 *p;
 666
 667         RESERVE_SPACE(8);
 668         WRITE32(OP_ACCESS);
 669         WRITE32(access);
 670
 671         return 0;
 672 }
 673
 674 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 675 {
 676         __be32 *p;
 677
 678         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 679         WRITE32(OP_CLOSE);
 680         WRITE32(arg->seqid->sequence->counter);
 681         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 682
 683         return 0;
 684 }
 685
 686 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 687 {
 688         __be32 *p;
 689
 690         RESERVE_SPACE(16);
 691         WRITE32(OP_COMMIT);
 692         WRITE64(args->offset);
 693         WRITE32(args->count);
 694
 695         return 0;
 696 }
 697
 698 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 699 {
 700         __be32 *p;
 701
 702         RESERVE_SPACE(8);
 703         WRITE32(OP_CREATE);
 704         WRITE32(create->ftype);
 705
 706         switch (create->ftype) {
 707         case NF4LNK:
 708                 RESERVE_SPACE(4);
 709                 WRITE32(create->u.symlink.len);
 710                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 711                 break;
 712
 713         case NF4BLK: case NF4CHR:
 714                 RESERVE_SPACE(8);
 715                 WRITE32(create->u.device.specdata1);
 716                 WRITE32(create->u.device.specdata2);
 717                 break;
 718
 719         default:
 720                 break;
 721         }
 722
 723         RESERVE_SPACE(4 + create->name->len);
 724         WRITE32(create->name->len);
 725         WRITEMEM(create->name->name, create->name->len);
 726
 727         return encode_attrs(xdr, create->attrs, create->server);
 728 }
 729
 730 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 731 {
 732         __be32 *p;
 733
 734         RESERVE_SPACE(12);
 735         WRITE32(OP_GETATTR);
 736         WRITE32(1);
 737         WRITE32(bitmap);
 738         return 0;
 739 }
 740
 741 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 742 {
 743         __be32 *p;
 744
 745         RESERVE_SPACE(16);
 746         WRITE32(OP_GETATTR);
 747         WRITE32(2);
 748         WRITE32(bm0);
 749         WRITE32(bm1);
 750         return 0;
 751 }
 752
 753 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 754 {
 755         return encode_getattr_two(xdr,
 756                         bitmask[0] & nfs4_fattr_bitmap[0],
 757                         bitmask[1] & nfs4_fattr_bitmap[1]);
 758 }
 759
 760 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 761 {
 762         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 763                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 764 }
 765
 766 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 767 {
 768         return encode_getattr_two(xdr,
 769                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 770                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 771 }
 772
 773 static int encode_getfh(struct xdr_stream *xdr)
 774 {
 775         __be32 *p;
 776
 777         RESERVE_SPACE(4);
 778         WRITE32(OP_GETFH);
 779
 780         return 0;
 781 }
 782
 783 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 784 {
 785         __be32 *p;
 786
 787         RESERVE_SPACE(8 + name->len);
 788         WRITE32(OP_LINK);
 789         WRITE32(name->len);
 790         WRITEMEM(name->name, name->len);
 791
 792         return 0;
 793 }
 794
 795 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 796 {
 797         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 798                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 799         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 800 }
 801
 802 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 803 {
 804         if (fl->fl_end == OFFSET_MAX)
 805                 return ~(uint64_t)0;
 806         return fl->fl_end - fl->fl_start + 1;
 807 }
 808
 809 /*
 810  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 811  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 812  */
 813 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 814 {
 815         __be32 *p;
 816
 817         RESERVE_SPACE(32);
 818         WRITE32(OP_LOCK);
 819         WRITE32(nfs4_lock_type(args->fl, args->block));
 820         WRITE32(args->reclaim);
 821         WRITE64(args->fl->fl_start);
 822         WRITE64(nfs4_lock_length(args->fl));
 823         WRITE32(args->new_lock_owner);
 824         if (args->new_lock_owner){
 825                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+20);
 826                 WRITE32(args->open_seqid->sequence->counter);
 827                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 828                 WRITE32(args->lock_seqid->sequence->counter);
 829                 WRITE64(args->lock_owner.clientid);
 830                 WRITE32(4);
 831                 WRITE32(args->lock_owner.id);
 832         }
 833         else {
 834                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 835                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 836                 WRITE32(args->lock_seqid->sequence->counter);
 837         }
 838
 839         return 0;
 840 }
 841
 842 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 843 {
 844         __be32 *p;
 845
 846         RESERVE_SPACE(40);
 847         WRITE32(OP_LOCKT);
 848         WRITE32(nfs4_lock_type(args->fl, 0));
 849         WRITE64(args->fl->fl_start);
 850         WRITE64(nfs4_lock_length(args->fl));
 851         WRITE64(args->lock_owner.clientid);
 852         WRITE32(4);
 853         WRITE32(args->lock_owner.id);
 854
 855         return 0;
 856 }
 857
 858 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 859 {
 860         __be32 *p;
 861
 862         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 863         WRITE32(OP_LOCKU);
 864         WRITE32(nfs4_lock_type(args->fl, 0));
 865         WRITE32(args->seqid->sequence->counter);
 866         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 867         WRITE64(args->fl->fl_start);
 868         WRITE64(nfs4_lock_length(args->fl));
 869
 870         return 0;
 871 }
 872
 873 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 874 {
 875         int len = name->len;
 876         __be32 *p;
 877
 878         RESERVE_SPACE(8 + len);
 879         WRITE32(OP_LOOKUP);
 880         WRITE32(len);
 881         WRITEMEM(name->name, len);
 882
 883         return 0;
 884 }
 885
 886 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 887 {
 888         __be32 *p;
 889
 890         RESERVE_SPACE(8);
 891         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 892                 case FMODE_READ:
 893                         WRITE32(NFS4_SHARE_ACCESS_READ);
 894                         break;
 895                 case FMODE_WRITE:
 896                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 897                         break;
 898                 case FMODE_READ|FMODE_WRITE:
 899                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 900                         break;
 901                 default:
 902                         BUG();
 903         }
 904         WRITE32(0);             /* for linux, share_deny = 0 always */
 905 }
 906
 907 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 908 {
 909         __be32 *p;
 910  /*
 911  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 912  * owner 4 = 32
 913  */
 914         RESERVE_SPACE(8);
 915         WRITE32(OP_OPEN);
 916         WRITE32(arg->seqid->sequence->counter);
 917         encode_share_access(xdr, arg->open_flags);
 918         RESERVE_SPACE(16);
 919         WRITE64(arg->clientid);
 920         WRITE32(4);
 921         WRITE32(arg->id);
 922 }
 923
 924 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 925 {
 926         __be32 *p;
 927
 928         RESERVE_SPACE(4);
 929         switch(arg->open_flags & O_EXCL) {
 930                 case 0:
 931                         WRITE32(NFS4_CREATE_UNCHECKED);
 932                         encode_attrs(xdr, arg->u.attrs, arg->server);
 933                         break;
 934                 default:
 935                         WRITE32(NFS4_CREATE_EXCLUSIVE);
 936                         encode_nfs4_verifier(xdr, &arg->u.verifier);
 937         }
 938 }
 939
 940 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 941 {
 942         __be32 *p;
 943
 944         RESERVE_SPACE(4);
 945         switch (arg->open_flags & O_CREAT) {
 946                 case 0:
 947                         WRITE32(NFS4_OPEN_NOCREATE);
 948                         break;
 949                 default:
 950                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
 951                         WRITE32(NFS4_OPEN_CREATE);
 952                         encode_createmode(xdr, arg);
 953         }
 954 }
 955
 956 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
 957 {
 958         __be32 *p;
 959
 960         RESERVE_SPACE(4);
 961         switch (delegation_type) {
 962                 case 0:
 963                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
 964                         break;
 965                 case FMODE_READ:
 966                         WRITE32(NFS4_OPEN_DELEGATE_READ);
 967                         break;
 968                 case FMODE_WRITE|FMODE_READ:
 969                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
 970                         break;
 971                 default:
 972                         BUG();
 973         }
 974 }
 975
 976 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
 977 {
 978         __be32 *p;
 979
 980         RESERVE_SPACE(4);
 981         WRITE32(NFS4_OPEN_CLAIM_NULL);
 982         encode_string(xdr, name->len, name->name);
 983 }
 984
 985 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
 986 {
 987         __be32 *p;
 988
 989         RESERVE_SPACE(4);
 990         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
 991         encode_delegation_type(xdr, type);
 992 }
 993
 994 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
 995 {
 996         __be32 *p;
 997
 998         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
 999         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1000         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1001         encode_string(xdr, name->len, name->name);
1002 }
1003
1004 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1005 {
1006         encode_openhdr(xdr, arg);
1007         encode_opentype(xdr, arg);
1008         switch (arg->claim) {
1009                 case NFS4_OPEN_CLAIM_NULL:
1010                         encode_claim_null(xdr, arg->name);
1011                         break;
1012                 case NFS4_OPEN_CLAIM_PREVIOUS:
1013                         encode_claim_previous(xdr, arg->u.delegation_type);
1014                         break;
1015                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1016                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1017                         break;
1018                 default:
1019                         BUG();
1020         }
1021         return 0;
1022 }
1023
1024 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1025 {
1026         __be32 *p;
1027
1028         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1029         WRITE32(OP_OPEN_CONFIRM);
1030         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1031         WRITE32(arg->seqid->sequence->counter);
1032
1033         return 0;
1034 }
1035
1036 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1037 {
1038         __be32 *p;
1039
1040         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1041         WRITE32(OP_OPEN_DOWNGRADE);
1042         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1043         WRITE32(arg->seqid->sequence->counter);
1044         encode_share_access(xdr, arg->open_flags);
1045         return 0;
1046 }
1047
1048 static int
1049 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1050 {
1051         int len = fh->size;
1052         __be32 *p;
1053
1054         RESERVE_SPACE(8 + len);
1055         WRITE32(OP_PUTFH);
1056         WRITE32(len);
1057         WRITEMEM(fh->data, len);
1058
1059         return 0;
1060 }
1061
1062 static int encode_putrootfh(struct xdr_stream *xdr)
1063 {
1064         __be32 *p;
1065
1066         RESERVE_SPACE(4);
1067         WRITE32(OP_PUTROOTFH);
1068
1069         return 0;
1070 }
1071
1072 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1073 {
1074         nfs4_stateid stateid;
1075         __be32 *p;
1076
1077         RESERVE_SPACE(NFS4_STATEID_SIZE);
1078         if (ctx->state != NULL) {
1079                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1080                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1081         } else
1082                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1083 }
1084
1085 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1086 {
1087         __be32 *p;
1088
1089         RESERVE_SPACE(4);
1090         WRITE32(OP_READ);
1091
1092         encode_stateid(xdr, args->context);
1093
1094         RESERVE_SPACE(12);
1095         WRITE64(args->offset);
1096         WRITE32(args->count);
1097
1098         return 0;
1099 }
1100
1101 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1102 {
1103         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1104         uint32_t attrs[2] = {
1105                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1106                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1107         };
1108         int replen;
1109         __be32 *p;
1110
1111         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1112         WRITE32(OP_READDIR);
1113         WRITE64(readdir->cookie);
1114         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1115         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1116         WRITE32(readdir->count);
1117         WRITE32(2);
1118         /* Switch to mounted_on_fileid if the server supports it */
1119         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1120                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1121         else
1122                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1123         WRITE32(attrs[0] & readdir->bitmask[0]);
1124         WRITE32(attrs[1] & readdir->bitmask[1]);
1125         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1126                         __FUNCTION__,
1127                         (unsigned long long)readdir->cookie,
1128                         ((u32 *)readdir->verifier.data)[0],
1129                         ((u32 *)readdir->verifier.data)[1],
1130                         attrs[0] & readdir->bitmask[0],
1131                         attrs[1] & readdir->bitmask[1]);
1132
1133         /* set up reply kvec
1134          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1135          *      + OP_READDIR + status + verifer(2)  = 9
1136          */
1137         replen = (RPC_REPHDRSIZE + auth->au_rslack + 9) << 2;
1138         xdr_inline_pages(&req->rq_rcv_buf, replen, readdir->pages,
1139                          readdir->pgbase, readdir->count);
1140         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1141                         __FUNCTION__, replen, readdir->pages,
1142                         readdir->pgbase, readdir->count);
1143
1144         return 0;
1145 }
1146
1147 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1148 {
1149         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1150         unsigned int replen;
1151         __be32 *p;
1152
1153         RESERVE_SPACE(4);
1154         WRITE32(OP_READLINK);
1155
1156         /* set up reply kvec
1157          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1158          *      + OP_READLINK + status + string length = 8
1159          */
1160         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1161         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1162                         readlink->pgbase, readlink->pglen);
1163
1164         return 0;
1165 }
1166
1167 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1168 {
1169         __be32 *p;
1170
1171         RESERVE_SPACE(8 + name->len);
1172         WRITE32(OP_REMOVE);
1173         WRITE32(name->len);
1174         WRITEMEM(name->name, name->len);
1175
1176         return 0;
1177 }
1178
1179 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1180 {
1181         __be32 *p;
1182
1183         RESERVE_SPACE(8 + oldname->len);
1184         WRITE32(OP_RENAME);
1185         WRITE32(oldname->len);
1186         WRITEMEM(oldname->name, oldname->len);
1187
1188         RESERVE_SPACE(4 + newname->len);
1189         WRITE32(newname->len);
1190         WRITEMEM(newname->name, newname->len);
1191
1192         return 0;
1193 }
1194
1195 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1196 {
1197         __be32 *p;
1198
1199         RESERVE_SPACE(12);
1200         WRITE32(OP_RENEW);
1201         WRITE64(client_stateid->cl_clientid);
1202
1203         return 0;
1204 }
1205
1206 static int
1207 encode_restorefh(struct xdr_stream *xdr)
1208 {
1209         __be32 *p;
1210
1211         RESERVE_SPACE(4);
1212         WRITE32(OP_RESTOREFH);
1213
1214         return 0;
1215 }
1216
1217 static int
1218 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1219 {
1220         __be32 *p;
1221
1222         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1223         WRITE32(OP_SETATTR);
1224         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1225         RESERVE_SPACE(2*4);
1226         WRITE32(1);
1227         WRITE32(FATTR4_WORD0_ACL);
1228         if (arg->acl_len % 4)
1229                 return -EINVAL;
1230         RESERVE_SPACE(4);
1231         WRITE32(arg->acl_len);
1232         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1233         return 0;
1234 }
1235
1236 static int
1237 encode_savefh(struct xdr_stream *xdr)
1238 {
1239         __be32 *p;
1240
1241         RESERVE_SPACE(4);
1242         WRITE32(OP_SAVEFH);
1243
1244         return 0;
1245 }
1246
1247 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1248 {
1249         int status;
1250         __be32 *p;
1251
1252         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1253         WRITE32(OP_SETATTR);
1254         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1255
1256         if ((status = encode_attrs(xdr, arg->iap, server)))
1257                 return status;
1258
1259         return 0;
1260 }
1261
1262 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1263 {
1264         __be32 *p;
1265
1266         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1267         WRITE32(OP_SETCLIENTID);
1268         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1269
1270         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1271         RESERVE_SPACE(4);
1272         WRITE32(setclientid->sc_prog);
1273         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1274         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1275         RESERVE_SPACE(4);
1276         WRITE32(setclientid->sc_cb_ident);
1277
1278         return 0;
1279 }
1280
1281 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1282 {
1283         __be32 *p;
1284
1285         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1286         WRITE32(OP_SETCLIENTID_CONFIRM);
1287         WRITE64(client_state->cl_clientid);
1288         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1289
1290         return 0;
1291 }
1292
1293 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1294 {
1295         __be32 *p;
1296
1297         RESERVE_SPACE(4);
1298         WRITE32(OP_WRITE);
1299
1300         encode_stateid(xdr, args->context);
1301
1302         RESERVE_SPACE(16);
1303         WRITE64(args->offset);
1304         WRITE32(args->stable);
1305         WRITE32(args->count);
1306
1307         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1308
1309         return 0;
1310 }
1311
1312 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1313 {
1314         __be32 *p;
1315
1316         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1317
1318         WRITE32(OP_DELEGRETURN);
1319         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1320         return 0;
1321
1322 }
1323 /*
1324  * END OF "GENERIC" ENCODE ROUTINES.
1325  */
1326
1327 /*
1328  * Encode an ACCESS request
1329  */
1330 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1331 {
1332         struct xdr_stream xdr;
1333         struct compound_hdr hdr = {
1334                 .nops = 2,
1335         };
1336         int status;
1337
1338         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1339         encode_compound_hdr(&xdr, &hdr);
1340         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1341                 status = encode_access(&xdr, args->access);
1342         return status;
1343 }
1344
1345 /*
1346  * Encode LOOKUP request
1347  */
1348 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1349 {
1350         struct xdr_stream xdr;
1351         struct compound_hdr hdr = {
1352                 .nops = 4,
1353         };
1354         int status;
1355
1356         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1357         encode_compound_hdr(&xdr, &hdr);
1358         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1359                 goto out;
1360         if ((status = encode_lookup(&xdr, args->name)) != 0)
1361                 goto out;
1362         if ((status = encode_getfh(&xdr)) != 0)
1363                 goto out;
1364         status = encode_getfattr(&xdr, args->bitmask);
1365 out:
1366         return status;
1367 }
1368
1369 /*
1370  * Encode LOOKUP_ROOT request
1371  */
1372 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1373 {
1374         struct xdr_stream xdr;
1375         struct compound_hdr hdr = {
1376                 .nops = 3,
1377         };
1378         int status;
1379
1380         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1381         encode_compound_hdr(&xdr, &hdr);
1382         if ((status = encode_putrootfh(&xdr)) != 0)
1383                 goto out;
1384         if ((status = encode_getfh(&xdr)) == 0)
1385                 status = encode_getfattr(&xdr, args->bitmask);
1386 out:
1387         return status;
1388 }
1389
1390 /*
1391  * Encode REMOVE request
1392  */
1393 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
1394 {
1395         struct xdr_stream xdr;
1396         struct compound_hdr hdr = {
1397                 .nops = 3,
1398         };
1399         int status;
1400
1401         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1402         encode_compound_hdr(&xdr, &hdr);
1403         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1404                 goto out;
1405         if ((status = encode_remove(&xdr, args->name)) != 0)
1406                 goto out;
1407         status = encode_getfattr(&xdr, args->bitmask);
1408 out:
1409         return status;
1410 }
1411
1412 /*
1413  * Encode RENAME request
1414  */
1415 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1416 {
1417         struct xdr_stream xdr;
1418         struct compound_hdr hdr = {
1419                 .nops = 7,
1420         };
1421         int status;
1422
1423         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1424         encode_compound_hdr(&xdr, &hdr);
1425         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1426                 goto out;
1427         if ((status = encode_savefh(&xdr)) != 0)
1428                 goto out;
1429         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1430                 goto out;
1431         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1432                 goto out;
1433         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1434                 goto out;
1435         if ((status = encode_restorefh(&xdr)) != 0)
1436                 goto out;
1437         status = encode_getfattr(&xdr, args->bitmask);
1438 out:
1439         return status;
1440 }
1441
1442 /*
1443  * Encode LINK request
1444  */
1445 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1446 {
1447         struct xdr_stream xdr;
1448         struct compound_hdr hdr = {
1449                 .nops = 7,
1450         };
1451         int status;
1452
1453         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1454         encode_compound_hdr(&xdr, &hdr);
1455         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1456                 goto out;
1457         if ((status = encode_savefh(&xdr)) != 0)
1458                 goto out;
1459         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1460                 goto out;
1461         if ((status = encode_link(&xdr, args->name)) != 0)
1462                 goto out;
1463         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1464                 goto out;
1465         if ((status = encode_restorefh(&xdr)) != 0)
1466                 goto out;
1467         status = encode_getfattr(&xdr, args->bitmask);
1468 out:
1469         return status;
1470 }
1471
1472 /*
1473  * Encode CREATE request
1474  */
1475 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1476 {
1477         struct xdr_stream xdr;
1478         struct compound_hdr hdr = {
1479                 .nops = 7,
1480         };
1481         int status;
1482
1483         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1484         encode_compound_hdr(&xdr, &hdr);
1485         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1486                 goto out;
1487         if ((status = encode_savefh(&xdr)) != 0)
1488                 goto out;
1489         if ((status = encode_create(&xdr, args)) != 0)
1490                 goto out;
1491         if ((status = encode_getfh(&xdr)) != 0)
1492                 goto out;
1493         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1494                 goto out;
1495         if ((status = encode_restorefh(&xdr)) != 0)
1496                 goto out;
1497         status = encode_getfattr(&xdr, args->bitmask);
1498 out:
1499         return status;
1500 }
1501
1502 /*
1503  * Encode SYMLINK request
1504  */
1505 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1506 {
1507         return nfs4_xdr_enc_create(req, p, args);
1508 }
1509
1510 /*
1511  * Encode GETATTR request
1512  */
1513 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1514 {
1515         struct xdr_stream xdr;
1516         struct compound_hdr hdr = {
1517                 .nops = 2,
1518         };
1519         int status;
1520
1521         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1522         encode_compound_hdr(&xdr, &hdr);
1523         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1524                 status = encode_getfattr(&xdr, args->bitmask);
1525         return status;
1526 }
1527
1528 /*
1529  * Encode a CLOSE request
1530  */
1531 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1532 {
1533         struct xdr_stream xdr;
1534         struct compound_hdr hdr = {
1535                 .nops   = 3,
1536         };
1537         int status;
1538
1539         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1540         encode_compound_hdr(&xdr, &hdr);
1541         status = encode_putfh(&xdr, args->fh);
1542         if(status)
1543                 goto out;
1544         status = encode_close(&xdr, args);
1545         if (status != 0)
1546                 goto out;
1547         status = encode_getfattr(&xdr, args->bitmask);
1548 out:
1549         return status;
1550 }
1551
1552 /*
1553  * Encode an OPEN request
1554  */
1555 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1556 {
1557         struct xdr_stream xdr;
1558         struct compound_hdr hdr = {
1559                 .nops = 7,
1560         };
1561         int status;
1562
1563         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1564         encode_compound_hdr(&xdr, &hdr);
1565         status = encode_putfh(&xdr, args->fh);
1566         if (status)
1567                 goto out;
1568         status = encode_savefh(&xdr);
1569         if (status)
1570                 goto out;
1571         status = encode_open(&xdr, args);
1572         if (status)
1573                 goto out;
1574         status = encode_getfh(&xdr);
1575         if (status)
1576                 goto out;
1577         status = encode_getfattr(&xdr, args->bitmask);
1578         if (status)
1579                 goto out;
1580         status = encode_restorefh(&xdr);
1581         if (status)
1582                 goto out;
1583         status = encode_getfattr(&xdr, args->bitmask);
1584 out:
1585         return status;
1586 }
1587
1588 /*
1589  * Encode an OPEN_CONFIRM request
1590  */
1591 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1592 {
1593         struct xdr_stream xdr;
1594         struct compound_hdr hdr = {
1595                 .nops   = 2,
1596         };
1597         int status;
1598
1599         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1600         encode_compound_hdr(&xdr, &hdr);
1601         status = encode_putfh(&xdr, args->fh);
1602         if(status)
1603                 goto out;
1604         status = encode_open_confirm(&xdr, args);
1605 out:
1606         return status;
1607 }
1608
1609 /*
1610  * Encode an OPEN request with no attributes.
1611  */
1612 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1613 {
1614         struct xdr_stream xdr;
1615         struct compound_hdr hdr = {
1616                 .nops   = 3,
1617         };
1618         int status;
1619
1620         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1621         encode_compound_hdr(&xdr, &hdr);
1622         status = encode_putfh(&xdr, args->fh);
1623         if (status)
1624                 goto out;
1625         status = encode_open(&xdr, args);
1626         if (status)
1627                 goto out;
1628         status = encode_getfattr(&xdr, args->bitmask);
1629 out:
1630         return status;
1631 }
1632
1633 /*
1634  * Encode an OPEN_DOWNGRADE request
1635  */
1636 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1637 {
1638         struct xdr_stream xdr;
1639         struct compound_hdr hdr = {
1640                 .nops   = 3,
1641         };
1642         int status;
1643
1644         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1645         encode_compound_hdr(&xdr, &hdr);
1646         status = encode_putfh(&xdr, args->fh);
1647         if (status)
1648                 goto out;
1649         status = encode_open_downgrade(&xdr, args);
1650         if (status != 0)
1651                 goto out;
1652         status = encode_getfattr(&xdr, args->bitmask);
1653 out:
1654         return status;
1655 }
1656
1657 /*
1658  * Encode a LOCK request
1659  */
1660 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1661 {
1662         struct xdr_stream xdr;
1663         struct compound_hdr hdr = {
1664                 .nops   = 2,
1665         };
1666         int status;
1667
1668         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1669         encode_compound_hdr(&xdr, &hdr);
1670         status = encode_putfh(&xdr, args->fh);
1671         if(status)
1672                 goto out;
1673         status = encode_lock(&xdr, args);
1674 out:
1675         return status;
1676 }
1677
1678 /*
1679  * Encode a LOCKT request
1680  */
1681 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1682 {
1683         struct xdr_stream xdr;
1684         struct compound_hdr hdr = {
1685                 .nops   = 2,
1686         };
1687         int status;
1688
1689         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1690         encode_compound_hdr(&xdr, &hdr);
1691         status = encode_putfh(&xdr, args->fh);
1692         if(status)
1693                 goto out;
1694         status = encode_lockt(&xdr, args);
1695 out:
1696         return status;
1697 }
1698
1699 /*
1700  * Encode a LOCKU request
1701  */
1702 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1703 {
1704         struct xdr_stream xdr;
1705         struct compound_hdr hdr = {
1706                 .nops   = 2,
1707         };
1708         int status;
1709
1710         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1711         encode_compound_hdr(&xdr, &hdr);
1712         status = encode_putfh(&xdr, args->fh);
1713         if(status)
1714                 goto out;
1715         status = encode_locku(&xdr, args);
1716 out:
1717         return status;
1718 }
1719
1720 /*
1721  * Encode a READLINK request
1722  */
1723 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1724 {
1725         struct xdr_stream xdr;
1726         struct compound_hdr hdr = {
1727                 .nops = 2,
1728         };
1729         int status;
1730
1731         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1732         encode_compound_hdr(&xdr, &hdr);
1733         status = encode_putfh(&xdr, args->fh);
1734         if(status)
1735                 goto out;
1736         status = encode_readlink(&xdr, args, req);
1737 out:
1738         return status;
1739 }
1740
1741 /*
1742  * Encode a READDIR request
1743  */
1744 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1745 {
1746         struct xdr_stream xdr;
1747         struct compound_hdr hdr = {
1748                 .nops = 2,
1749         };
1750         int status;
1751
1752         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1753         encode_compound_hdr(&xdr, &hdr);
1754         status = encode_putfh(&xdr, args->fh);
1755         if(status)
1756                 goto out;
1757         status = encode_readdir(&xdr, args, req);
1758 out:
1759         return status;
1760 }
1761
1762 /*
1763  * Encode a READ request
1764  */
1765 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1766 {
1767         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1768         struct xdr_stream xdr;
1769         struct compound_hdr hdr = {
1770                 .nops = 2,
1771         };
1772         int replen, status;
1773
1774         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1775         encode_compound_hdr(&xdr, &hdr);
1776         status = encode_putfh(&xdr, args->fh);
1777         if (status)
1778                 goto out;
1779         status = encode_read(&xdr, args);
1780         if (status)
1781                 goto out;
1782
1783         /* set up reply kvec
1784          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1785          *       + OP_READ + status + eof + datalen = 9
1786          */
1787         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1788         xdr_inline_pages(&req->rq_rcv_buf, replen,
1789                          args->pages, args->pgbase, args->count);
1790 out:
1791         return status;
1792 }
1793
1794 /*
1795  * Encode an SETATTR request
1796  */
1797 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1798
1799 {
1800         struct xdr_stream xdr;
1801         struct compound_hdr hdr = {
1802                 .nops   = 3,
1803         };
1804         int status;
1805
1806         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1807         encode_compound_hdr(&xdr, &hdr);
1808         status = encode_putfh(&xdr, args->fh);
1809         if(status)
1810                 goto out;
1811         status = encode_setattr(&xdr, args, args->server);
1812         if(status)
1813                 goto out;
1814         status = encode_getfattr(&xdr, args->bitmask);
1815 out:
1816         return status;
1817 }
1818
1819 /*
1820  * Encode a GETACL request
1821  */
1822 static int
1823 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1824                 struct nfs_getaclargs *args)
1825 {
1826         struct xdr_stream xdr;
1827         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1828         struct compound_hdr hdr = {
1829                 .nops   = 2,
1830         };
1831         int replen, status;
1832
1833         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1834         encode_compound_hdr(&xdr, &hdr);
1835         status = encode_putfh(&xdr, args->fh);
1836         if (status)
1837                 goto out;
1838         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1839         /* set up reply buffer: */
1840         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1841         xdr_inline_pages(&req->rq_rcv_buf, replen,
1842                 args->acl_pages, args->acl_pgbase, args->acl_len);
1843 out:
1844         return status;
1845 }
1846
1847 /*
1848  * Encode a WRITE request
1849  */
1850 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1851 {
1852         struct xdr_stream xdr;
1853         struct compound_hdr hdr = {
1854                 .nops = 3,
1855         };
1856         int status;
1857
1858         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1859         encode_compound_hdr(&xdr, &hdr);
1860         status = encode_putfh(&xdr, args->fh);
1861         if (status)
1862                 goto out;
1863         status = encode_write(&xdr, args);
1864         if (status)
1865                 goto out;
1866         status = encode_getfattr(&xdr, args->bitmask);
1867 out:
1868         return status;
1869 }
1870
1871 /*
1872  *  a COMMIT request
1873  */
1874 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1875 {
1876         struct xdr_stream xdr;
1877         struct compound_hdr hdr = {
1878                 .nops = 3,
1879         };
1880         int status;
1881
1882         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1883         encode_compound_hdr(&xdr, &hdr);
1884         status = encode_putfh(&xdr, args->fh);
1885         if (status)
1886                 goto out;
1887         status = encode_commit(&xdr, args);
1888         if (status)
1889                 goto out;
1890         status = encode_getfattr(&xdr, args->bitmask);
1891 out:
1892         return status;
1893 }
1894
1895 /*
1896  * FSINFO request
1897  */
1898 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1899 {
1900         struct xdr_stream xdr;
1901         struct compound_hdr hdr = {
1902                 .nops   = 2,
1903         };
1904         int status;
1905
1906         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1907         encode_compound_hdr(&xdr, &hdr);
1908         status = encode_putfh(&xdr, args->fh);
1909         if (!status)
1910                 status = encode_fsinfo(&xdr, args->bitmask);
1911         return status;
1912 }
1913
1914 /*
1915  * a PATHCONF request
1916  */
1917 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1918 {
1919         struct xdr_stream xdr;
1920         struct compound_hdr hdr = {
1921                 .nops = 2,
1922         };
1923         int status;
1924
1925         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1926         encode_compound_hdr(&xdr, &hdr);
1927         status = encode_putfh(&xdr, args->fh);
1928         if (!status)
1929                 status = encode_getattr_one(&xdr,
1930                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
1931         return status;
1932 }
1933
1934 /*
1935  * a STATFS request
1936  */
1937 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1938 {
1939         struct xdr_stream xdr;
1940         struct compound_hdr hdr = {
1941                 .nops = 2,
1942         };
1943         int status;
1944
1945         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1946         encode_compound_hdr(&xdr, &hdr);
1947         status = encode_putfh(&xdr, args->fh);
1948         if (status == 0)
1949                 status = encode_getattr_two(&xdr,
1950                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
1951                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
1952         return status;
1953 }
1954
1955 /*
1956  * GETATTR_BITMAP request
1957  */
1958 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .nops = 2,
1963         };
1964         int status;
1965
1966         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1967         encode_compound_hdr(&xdr, &hdr);
1968         status = encode_putfh(&xdr, fhandle);
1969         if (status == 0)
1970                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1971                                 FATTR4_WORD0_LINK_SUPPORT|
1972                                 FATTR4_WORD0_SYMLINK_SUPPORT|
1973                                 FATTR4_WORD0_ACLSUPPORT);
1974         return status;
1975 }
1976
1977 /*
1978  * a RENEW request
1979  */
1980 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1981 {
1982         struct xdr_stream xdr;
1983         struct compound_hdr hdr = {
1984                 .nops   = 1,
1985         };
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, &hdr);
1989         return encode_renew(&xdr, clp);
1990 }
1991
1992 /*
1993  * a SETCLIENTID request
1994  */
1995 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1996 {
1997         struct xdr_stream xdr;
1998         struct compound_hdr hdr = {
1999                 .nops   = 1,
2000         };
2001
2002         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2003         encode_compound_hdr(&xdr, &hdr);
2004         return encode_setclientid(&xdr, sc);
2005 }
2006
2007 /*
2008  * a SETCLIENTID_CONFIRM request
2009  */
2010 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2011 {
2012         struct xdr_stream xdr;
2013         struct compound_hdr hdr = {
2014                 .nops   = 3,
2015         };
2016         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2017         int status;
2018
2019         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2020         encode_compound_hdr(&xdr, &hdr);
2021         status = encode_setclientid_confirm(&xdr, clp);
2022         if (!status)
2023                 status = encode_putrootfh(&xdr);
2024         if (!status)
2025                 status = encode_fsinfo(&xdr, lease_bitmap);
2026         return status;
2027 }
2028
2029 /*
2030  * DELEGRETURN request
2031  */
2032 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2033 {
2034         struct xdr_stream xdr;
2035         struct compound_hdr hdr = {
2036                 .nops = 3,
2037         };
2038         int status;
2039
2040         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2041         encode_compound_hdr(&xdr, &hdr);
2042         status = encode_putfh(&xdr, args->fhandle);
2043         if (status != 0)
2044                 goto out;
2045         status = encode_delegreturn(&xdr, args->stateid);
2046         if (status != 0)
2047                 goto out;
2048         status = encode_getfattr(&xdr, args->bitmask);
2049 out:
2050         return status;
2051 }
2052
2053 /*
2054  * Encode FS_LOCATIONS request
2055  */
2056 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2057 {
2058         struct xdr_stream xdr;
2059         struct compound_hdr hdr = {
2060                 .nops = 3,
2061         };
2062         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2063         int replen;
2064         int status;
2065
2066         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2067         encode_compound_hdr(&xdr, &hdr);
2068         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2069                 goto out;
2070         if ((status = encode_lookup(&xdr, args->name)) != 0)
2071                 goto out;
2072         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2073                 goto out;
2074         /* set up reply
2075          *   toplevel_status + OP_PUTFH + status
2076          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2077          */
2078         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2079         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2080                         0, PAGE_SIZE);
2081 out:
2082         return status;
2083 }
2084
2085 /*
2086  * START OF "GENERIC" DECODE ROUTINES.
2087  *   These may look a little ugly since they are imported from a "generic"
2088  * set of XDR encode/decode routines which are intended to be shared by
2089  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2090  *
2091  * If the pain of reading these is too great, it should be a straightforward
2092  * task to translate them into Linux-specific versions which are more
2093  * consistent with the style used in NFSv2/v3...
2094  */
2095 #define READ32(x)         (x) = ntohl(*p++)
2096 #define READ64(x)         do {                  \
2097         (x) = (u64)ntohl(*p++) << 32;           \
2098         (x) |= ntohl(*p++);                     \
2099 } while (0)
2100 #define READTIME(x)       do {                  \
2101         p++;                                    \
2102         (x.tv_sec) = ntohl(*p++);               \
2103         (x.tv_nsec) = ntohl(*p++);              \
2104 } while (0)
2105 #define COPYMEM(x,nbytes) do {                  \
2106         memcpy((x), p, nbytes);                 \
2107         p += XDR_QUADLEN(nbytes);               \
2108 } while (0)
2109
2110 #define READ_BUF(nbytes)  do { \
2111         p = xdr_inline_decode(xdr, nbytes); \
2112         if (unlikely(!p)) { \
2113                 printk(KERN_INFO "%s: prematurely hit end of receive" \
2114                                 " buffer\n", __FUNCTION__); \
2115                 printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2116                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2117                 return -EIO; \
2118         } \
2119 } while (0)
2120
2121 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2122 {
2123         __be32 *p;
2124
2125         READ_BUF(4);
2126         READ32(*len);
2127         READ_BUF(*len);
2128         *string = (char *)p;
2129         return 0;
2130 }
2131
2132 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2133 {
2134         __be32 *p;
2135
2136         READ_BUF(8);
2137         READ32(hdr->status);
2138         READ32(hdr->taglen);
2139
2140         READ_BUF(hdr->taglen + 4);
2141         hdr->tag = (char *)p;
2142         p += XDR_QUADLEN(hdr->taglen);
2143         READ32(hdr->nops);
2144         return 0;
2145 }
2146
2147 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2148 {
2149         __be32 *p;
2150         uint32_t opnum;
2151         int32_t nfserr;
2152
2153         READ_BUF(8);
2154         READ32(opnum);
2155         if (opnum != expected) {
2156                 printk(KERN_NOTICE
2157                                 "nfs4_decode_op_hdr: Server returned operation"
2158                                 " %d but we issued a request for %d\n",
2159                                 opnum, expected);
2160                 return -EIO;
2161         }
2162         READ32(nfserr);
2163         if (nfserr != NFS_OK)
2164                 return -nfs4_stat_to_errno(nfserr);
2165         return 0;
2166 }
2167
2168 /* Dummy routine */
2169 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2170 {
2171         __be32 *p;
2172         unsigned int strlen;
2173         char *str;
2174
2175         READ_BUF(12);
2176         return decode_opaque_inline(xdr, &strlen, &str);
2177 }
2178
2179 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2180 {
2181         uint32_t bmlen;
2182         __be32 *p;
2183
2184         READ_BUF(4);
2185         READ32(bmlen);
2186
2187         bitmap[0] = bitmap[1] = 0;
2188         READ_BUF((bmlen << 2));
2189         if (bmlen > 0) {
2190                 READ32(bitmap[0]);
2191                 if (bmlen > 1)
2192                         READ32(bitmap[1]);
2193         }
2194         return 0;
2195 }
2196
2197 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2198 {
2199         __be32 *p;
2200
2201         READ_BUF(4);
2202         READ32(*attrlen);
2203         *savep = xdr->p;
2204         return 0;
2205 }
2206
2207 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2208 {
2209         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2210                 decode_attr_bitmap(xdr, bitmask);
2211                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2212         } else
2213                 bitmask[0] = bitmask[1] = 0;
2214         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2215         return 0;
2216 }
2217
2218 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2219 {
2220         __be32 *p;
2221
2222         *type = 0;
2223         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2224                 return -EIO;
2225         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2226                 READ_BUF(4);
2227                 READ32(*type);
2228                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2229                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2230                         return -EIO;
2231                 }
2232                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2233         }
2234         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2235         return 0;
2236 }
2237
2238 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2239 {
2240         __be32 *p;
2241
2242         *change = 0;
2243         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2244                 return -EIO;
2245         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2246                 READ_BUF(8);
2247                 READ64(*change);
2248                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2249         }
2250         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2251                         (unsigned long long)*change);
2252         return 0;
2253 }
2254
2255 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2256 {
2257         __be32 *p;
2258
2259         *size = 0;
2260         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2261                 return -EIO;
2262         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2263                 READ_BUF(8);
2264                 READ64(*size);
2265                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2266         }
2267         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2268         return 0;
2269 }
2270
2271 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2272 {
2273         __be32 *p;
2274
2275         *res = 0;
2276         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2277                 return -EIO;
2278         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2279                 READ_BUF(4);
2280                 READ32(*res);
2281                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2282         }
2283         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2284         return 0;
2285 }
2286
2287 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2288 {
2289         __be32 *p;
2290
2291         *res = 0;
2292         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2293                 return -EIO;
2294         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2295                 READ_BUF(4);
2296                 READ32(*res);
2297                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2298         }
2299         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2300         return 0;
2301 }
2302
2303 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2304 {
2305         __be32 *p;
2306
2307         fsid->major = 0;
2308         fsid->minor = 0;
2309         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2310                 return -EIO;
2311         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2312                 READ_BUF(16);
2313                 READ64(fsid->major);
2314                 READ64(fsid->minor);
2315                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2316         }
2317         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2318                         (unsigned long long)fsid->major,
2319                         (unsigned long long)fsid->minor);
2320         return 0;
2321 }
2322
2323 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2324 {
2325         __be32 *p;
2326
2327         *res = 60;
2328         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2329                 return -EIO;
2330         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2331                 READ_BUF(4);
2332                 READ32(*res);
2333                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2334         }
2335         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2336         return 0;
2337 }
2338
2339 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2340 {
2341         __be32 *p;
2342
2343         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2344         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2345                 return -EIO;
2346         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2347                 READ_BUF(4);
2348                 READ32(*res);
2349                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2350         }
2351         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2352         return 0;
2353 }
2354
2355 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2356 {
2357         __be32 *p;
2358
2359         *fileid = 0;
2360         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2361                 return -EIO;
2362         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2363                 READ_BUF(8);
2364                 READ64(*fileid);
2365                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2366         }
2367         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2368         return 0;
2369 }
2370
2371 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2372 {
2373         __be32 *p;
2374
2375         *fileid = 0;
2376         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2377                 return -EIO;
2378         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2379                 READ_BUF(8);
2380                 READ64(*fileid);
2381                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2382         }
2383         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2384         return 0;
2385 }
2386
2387 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2388 {
2389         __be32 *p;
2390         int status = 0;
2391
2392         *res = 0;
2393         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2394                 return -EIO;
2395         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2396                 READ_BUF(8);
2397                 READ64(*res);
2398                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2399         }
2400         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2401         return status;
2402 }
2403
2404 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2405 {
2406         __be32 *p;
2407         int status = 0;
2408
2409         *res = 0;
2410         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2411                 return -EIO;
2412         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2413                 READ_BUF(8);
2414                 READ64(*res);
2415                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2416         }
2417         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2418         return status;
2419 }
2420
2421 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2422 {
2423         __be32 *p;
2424         int status = 0;
2425
2426         *res = 0;
2427         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2428                 return -EIO;
2429         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2430                 READ_BUF(8);
2431                 READ64(*res);
2432                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2433         }
2434         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2435         return status;
2436 }
2437
2438 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2439 {
2440         int n;
2441         __be32 *p;
2442         int status = 0;
2443
2444         READ_BUF(4);
2445         READ32(n);
2446         if (n < 0)
2447                 goto out_eio;
2448         if (n == 0)
2449                 goto root_path;
2450         dprintk("path ");
2451         path->ncomponents = 0;
2452         while (path->ncomponents < n) {
2453                 struct nfs4_string *component = &path->components[path->ncomponents];
2454                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2455                 if (unlikely(status != 0))
2456                         goto out_eio;
2457                 if (path->ncomponents != n)
2458                         dprintk("/");
2459                 dprintk("%s", component->data);
2460                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2461                         path->ncomponents++;
2462                 else {
2463                         dprintk("cannot parse %d components in path\n", n);
2464                         goto out_eio;
2465                 }
2466         }
2467 out:
2468         dprintk("\n");
2469         return status;
2470 root_path:
2471 /* a root pathname is sent as a zero component4 */
2472         path->ncomponents = 1;
2473         path->components[0].len=0;
2474         path->components[0].data=NULL;
2475         dprintk("path /\n");
2476         goto out;
2477 out_eio:
2478         dprintk(" status %d", status);
2479         status = -EIO;
2480         goto out;
2481 }
2482
2483 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2484 {
2485         int n;
2486         __be32 *p;
2487         int status = -EIO;
2488
2489         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2490                 goto out;
2491         status = 0;
2492         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2493                 goto out;
2494         dprintk("%s: fsroot ", __FUNCTION__);
2495         status = decode_pathname(xdr, &res->fs_path);
2496         if (unlikely(status != 0))
2497                 goto out;
2498         READ_BUF(4);
2499         READ32(n);
2500         if (n <= 0)
2501                 goto out_eio;
2502         res->nlocations = 0;
2503         while (res->nlocations < n) {
2504                 int m;
2505                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2506
2507                 READ_BUF(4);
2508                 READ32(m);
2509                 if (m <= 0)
2510                         goto out_eio;
2511
2512                 loc->nservers = 0;
2513                 dprintk("%s: servers ", __FUNCTION__);
2514                 while (loc->nservers < m) {
2515                         struct nfs4_string *server = &loc->servers[loc->nservers];
2516                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2517                         if (unlikely(status != 0))
2518                                 goto out_eio;
2519                         dprintk("%s ", server->data);
2520                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2521                                 loc->nservers++;
2522                         else {
2523                                 int i;
2524                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2525                                 for (i = loc->nservers; i < m; i++) {
2526                                         unsigned int len;
2527                                         char *data;
2528                                         status = decode_opaque_inline(xdr, &len, &data);
2529                                         if (unlikely(status != 0))
2530                                                 goto out_eio;
2531                                 }
2532                         }
2533                 }
2534                 status = decode_pathname(xdr, &loc->rootpath);
2535                 if (unlikely(status != 0))
2536                         goto out_eio;
2537                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2538                         res->nlocations++;
2539         }
2540 out:
2541         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2542         return status;
2543 out_eio:
2544         status = -EIO;
2545         goto out;
2546 }
2547
2548 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2549 {
2550         __be32 *p;
2551         int status = 0;
2552
2553         *res = 0;
2554         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2555                 return -EIO;
2556         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2557                 READ_BUF(8);
2558                 READ64(*res);
2559                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2560         }
2561         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2562         return status;
2563 }
2564
2565 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2566 {
2567         __be32 *p;
2568         int status = 0;
2569
2570         *maxlink = 1;
2571         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2572                 return -EIO;
2573         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2574                 READ_BUF(4);
2575                 READ32(*maxlink);
2576                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2577         }
2578         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2579         return status;
2580 }
2581
2582 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2583 {
2584         __be32 *p;
2585         int status = 0;
2586
2587         *maxname = 1024;
2588         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2589                 return -EIO;
2590         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2591                 READ_BUF(4);
2592                 READ32(*maxname);
2593                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2594         }
2595         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2596         return status;
2597 }
2598
2599 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2600 {
2601         __be32 *p;
2602         int status = 0;
2603
2604         *res = 1024;
2605         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2606                 return -EIO;
2607         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2608                 uint64_t maxread;
2609                 READ_BUF(8);
2610                 READ64(maxread);
2611                 if (maxread > 0x7FFFFFFF)
2612                         maxread = 0x7FFFFFFF;
2613                 *res = (uint32_t)maxread;
2614                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2615         }
2616         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2617         return status;
2618 }
2619
2620 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2621 {
2622         __be32 *p;
2623         int status = 0;
2624
2625         *res = 1024;
2626         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2627                 return -EIO;
2628         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2629                 uint64_t maxwrite;
2630                 READ_BUF(8);
2631                 READ64(maxwrite);
2632                 if (maxwrite > 0x7FFFFFFF)
2633                         maxwrite = 0x7FFFFFFF;
2634                 *res = (uint32_t)maxwrite;
2635                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2636         }
2637         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2638         return status;
2639 }
2640
2641 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2642 {
2643         __be32 *p;
2644
2645         *mode = 0;
2646         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2647                 return -EIO;
2648         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2649                 READ_BUF(4);
2650                 READ32(*mode);
2651                 *mode &= ~S_IFMT;
2652                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2653         }
2654         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2655         return 0;
2656 }
2657
2658 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2659 {
2660         __be32 *p;
2661
2662         *nlink = 1;
2663         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2664                 return -EIO;
2665         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2666                 READ_BUF(4);
2667                 READ32(*nlink);
2668                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2669         }
2670         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2671         return 0;
2672 }
2673
2674 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2675 {
2676         uint32_t len;
2677         __be32 *p;
2678
2679         *uid = -2;
2680         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2681                 return -EIO;
2682         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2683                 READ_BUF(4);
2684                 READ32(len);
2685                 READ_BUF(len);
2686                 if (len < XDR_MAX_NETOBJ) {
2687                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2688                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2689                                                 __FUNCTION__);
2690                 } else
2691                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2692                                         __FUNCTION__, len);
2693                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2694         }
2695         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2696         return 0;
2697 }
2698
2699 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2700 {
2701         uint32_t len;
2702         __be32 *p;
2703
2704         *gid = -2;
2705         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2706                 return -EIO;
2707         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2708                 READ_BUF(4);
2709                 READ32(len);
2710                 READ_BUF(len);
2711                 if (len < XDR_MAX_NETOBJ) {
2712                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2713                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2714                                                 __FUNCTION__);
2715                 } else
2716                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2717                                         __FUNCTION__, len);
2718                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2719         }
2720         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2721         return 0;
2722 }
2723
2724 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2725 {
2726         uint32_t major = 0, minor = 0;
2727         __be32 *p;
2728
2729         *rdev = MKDEV(0,0);
2730         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2731                 return -EIO;
2732         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2733                 dev_t tmp;
2734
2735                 READ_BUF(8);
2736                 READ32(major);
2737                 READ32(minor);
2738                 tmp = MKDEV(major, minor);
2739                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2740                         *rdev = tmp;
2741                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2742         }
2743         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2744         return 0;
2745 }
2746
2747 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2748 {
2749         __be32 *p;
2750         int status = 0;
2751
2752         *res = 0;
2753         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2754                 return -EIO;
2755         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2756                 READ_BUF(8);
2757                 READ64(*res);
2758                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2759         }
2760         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2761         return status;
2762 }
2763
2764 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2765 {
2766         __be32 *p;
2767         int status = 0;
2768
2769         *res = 0;
2770         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2771                 return -EIO;
2772         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2773                 READ_BUF(8);
2774                 READ64(*res);
2775                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2776         }
2777         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2778         return status;
2779 }
2780
2781 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2782 {
2783         __be32 *p;
2784         int status = 0;
2785
2786         *res = 0;
2787         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2788                 return -EIO;
2789         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2790                 READ_BUF(8);
2791                 READ64(*res);
2792                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2793         }
2794         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2795         return status;
2796 }
2797
2798 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2799 {
2800         __be32 *p;
2801
2802         *used = 0;
2803         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2804                 return -EIO;
2805         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2806                 READ_BUF(8);
2807                 READ64(*used);
2808                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2809         }
2810         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2811                         (unsigned long long)*used);
2812         return 0;
2813 }
2814
2815 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2816 {
2817         __be32 *p;
2818         uint64_t sec;
2819         uint32_t nsec;
2820
2821         READ_BUF(12);
2822         READ64(sec);
2823         READ32(nsec);
2824         time->tv_sec = (time_t)sec;
2825         time->tv_nsec = (long)nsec;
2826         return 0;
2827 }
2828
2829 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2830 {
2831         int status = 0;
2832
2833         time->tv_sec = 0;
2834         time->tv_nsec = 0;
2835         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2836                 return -EIO;
2837         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2838                 status = decode_attr_time(xdr, time);
2839                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2840         }
2841         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2842         return status;
2843 }
2844
2845 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2846 {
2847         int status = 0;
2848
2849         time->tv_sec = 0;
2850         time->tv_nsec = 0;
2851         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2852                 return -EIO;
2853         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2854                 status = decode_attr_time(xdr, time);
2855                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2856         }
2857         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2858         return status;
2859 }
2860
2861 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2862 {
2863         int status = 0;
2864
2865         time->tv_sec = 0;
2866         time->tv_nsec = 0;
2867         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2868                 return -EIO;
2869         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2870                 status = decode_attr_time(xdr, time);
2871                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2872         }
2873         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2874         return status;
2875 }
2876
2877 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2878 {
2879         unsigned int attrwords = XDR_QUADLEN(attrlen);
2880         unsigned int nwords = xdr->p - savep;
2881
2882         if (unlikely(attrwords != nwords)) {
2883                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2884                                 __FUNCTION__,
2885                                 attrwords << 2,
2886                                 (attrwords < nwords) ? '<' : '>',
2887                                 nwords << 2);
2888                 return -EIO;
2889         }
2890         return 0;
2891 }
2892
2893 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2894 {
2895         __be32 *p;
2896
2897         READ_BUF(20);
2898         READ32(cinfo->atomic);
2899         READ64(cinfo->before);
2900         READ64(cinfo->after);
2901         return 0;
2902 }
2903
2904 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2905 {
2906         __be32 *p;
2907         uint32_t supp, acc;
2908         int status;
2909
2910         status = decode_op_hdr(xdr, OP_ACCESS);
2911         if (status)
2912                 return status;
2913         READ_BUF(8);
2914         READ32(supp);
2915         READ32(acc);
2916         access->supported = supp;
2917         access->access = acc;
2918         return 0;
2919 }
2920
2921 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2922 {
2923         __be32 *p;
2924         int status;
2925
2926         status = decode_op_hdr(xdr, OP_CLOSE);
2927         if (status)
2928                 return status;
2929         READ_BUF(NFS4_STATEID_SIZE);
2930         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2931         return 0;
2932 }
2933
2934 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2935 {
2936         __be32 *p;
2937         int status;
2938
2939         status = decode_op_hdr(xdr, OP_COMMIT);
2940         if (status)
2941                 return status;
2942         READ_BUF(8);
2943         COPYMEM(res->verf->verifier, 8);
2944         return 0;
2945 }
2946
2947 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2948 {
2949         __be32 *p;
2950         uint32_t bmlen;
2951         int status;
2952
2953         status = decode_op_hdr(xdr, OP_CREATE);
2954         if (status)
2955                 return status;
2956         if ((status = decode_change_info(xdr, cinfo)))
2957                 return status;
2958         READ_BUF(4);
2959         READ32(bmlen);
2960         READ_BUF(bmlen << 2);
2961         return 0;
2962 }
2963
2964 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2965 {
2966         __be32 *savep;
2967         uint32_t attrlen,
2968                  bitmap[2] = {0};
2969         int status;
2970
2971         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2972                 goto xdr_error;
2973         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2974                 goto xdr_error;
2975         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2976                 goto xdr_error;
2977         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2978                 goto xdr_error;
2979         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2980                 goto xdr_error;
2981         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2982                 goto xdr_error;
2983         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2984                 goto xdr_error;
2985         status = verify_attr_len(xdr, savep, attrlen);
2986 xdr_error:
2987         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
2988         return status;
2989 }
2990
2991 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2992 {
2993         __be32 *savep;
2994         uint32_t attrlen,
2995                  bitmap[2] = {0};
2996         int status;
2997
2998         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2999                 goto xdr_error;
3000         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3001                 goto xdr_error;
3002         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3003                 goto xdr_error;
3004
3005         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3006                 goto xdr_error;
3007         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3008                 goto xdr_error;
3009         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3010                 goto xdr_error;
3011         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3012                 goto xdr_error;
3013         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3014                 goto xdr_error;
3015         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3016                 goto xdr_error;
3017
3018         status = verify_attr_len(xdr, savep, attrlen);
3019 xdr_error:
3020         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3021         return status;
3022 }
3023
3024 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3025 {
3026         __be32 *savep;
3027         uint32_t attrlen,
3028                  bitmap[2] = {0};
3029         int status;
3030
3031         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3032                 goto xdr_error;
3033         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3034                 goto xdr_error;
3035         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3036                 goto xdr_error;
3037
3038         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3039                 goto xdr_error;
3040         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3041                 goto xdr_error;
3042
3043         status = verify_attr_len(xdr, savep, attrlen);
3044 xdr_error:
3045         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3046         return status;
3047 }
3048
3049 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3050 {
3051         __be32 *savep;
3052         uint32_t attrlen,
3053                  bitmap[2] = {0},
3054                  type;
3055         int status, fmode = 0;
3056         uint64_t fileid;
3057
3058         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3059                 goto xdr_error;
3060         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3061                 goto xdr_error;
3062
3063         fattr->bitmap[0] = bitmap[0];
3064         fattr->bitmap[1] = bitmap[1];
3065
3066         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3067                 goto xdr_error;
3068
3069
3070         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3071                 goto xdr_error;
3072         fattr->type = nfs_type2fmt[type].nfs2type;
3073         fmode = nfs_type2fmt[type].mode;
3074
3075         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3076                 goto xdr_error;
3077         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3078                 goto xdr_error;
3079         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3080                 goto xdr_error;
3081         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3082                 goto xdr_error;
3083         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3084                                                 struct nfs4_fs_locations,
3085                                                 fattr))) != 0)
3086                 goto xdr_error;
3087         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3088                 goto xdr_error;
3089         fattr->mode |= fmode;
3090         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3091                 goto xdr_error;
3092         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3093                 goto xdr_error;
3094         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3095                 goto xdr_error;
3096         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3097                 goto xdr_error;
3098         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3099                 goto xdr_error;
3100         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3101                 goto xdr_error;
3102         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3103                 goto xdr_error;
3104         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3105                 goto xdr_error;
3106         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3107                 goto xdr_error;
3108         if (fattr->fileid == 0 && fileid != 0)
3109                 fattr->fileid = fileid;
3110         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3111                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3112 xdr_error:
3113         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3114         return status;
3115 }
3116
3117
3118 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3119 {
3120         __be32 *savep;
3121         uint32_t attrlen, bitmap[2];
3122         int status;
3123
3124         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3125                 goto xdr_error;
3126         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3127                 goto xdr_error;
3128         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3129                 goto xdr_error;
3130
3131         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3132
3133         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3134                 goto xdr_error;
3135         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3136                 goto xdr_error;
3137         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3138                 goto xdr_error;
3139         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3140         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3141                 goto xdr_error;
3142         fsinfo->wtpref = fsinfo->wtmax;
3143
3144         status = verify_attr_len(xdr, savep, attrlen);
3145 xdr_error:
3146         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3147         return status;
3148 }
3149
3150 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3151 {
3152         __be32 *p;
3153         uint32_t len;
3154         int status;
3155
3156         status = decode_op_hdr(xdr, OP_GETFH);
3157         if (status)
3158                 return status;
3159         /* Zero handle first to allow comparisons */
3160         memset(fh, 0, sizeof(*fh));
3161
3162         READ_BUF(4);
3163         READ32(len);
3164         if (len > NFS4_FHSIZE)
3165                 return -EIO;
3166         fh->size = len;
3167         READ_BUF(len);
3168         COPYMEM(fh->data, len);
3169         return 0;
3170 }
3171
3172 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3173 {
3174         int status;
3175
3176         status = decode_op_hdr(xdr, OP_LINK);
3177         if (status)
3178                 return status;
3179         return decode_change_info(xdr, cinfo);
3180 }
3181
3182 /*
3183  * We create the owner, so we know a proper owner.id length is 4.
3184  */
3185 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3186 {
3187         uint64_t offset, length, clientid;
3188         __be32 *p;
3189         uint32_t namelen, type;
3190
3191         READ_BUF(32);
3192         READ64(offset);
3193         READ64(length);
3194         READ32(type);
3195         if (fl != NULL) {
3196                 fl->fl_start = (loff_t)offset;
3197                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3198                 if (length == ~(uint64_t)0)
3199                         fl->fl_end = OFFSET_MAX;
3200                 fl->fl_type = F_WRLCK;
3201                 if (type & 1)
3202                         fl->fl_type = F_RDLCK;
3203                 fl->fl_pid = 0;
3204         }
3205         READ64(clientid);
3206         READ32(namelen);
3207         READ_BUF(namelen);
3208         return -NFS4ERR_DENIED;
3209 }
3210
3211 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3212 {
3213         __be32 *p;
3214         int status;
3215
3216         status = decode_op_hdr(xdr, OP_LOCK);
3217         if (status == 0) {
3218                 READ_BUF(NFS4_STATEID_SIZE);
3219                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3220         } else if (status == -NFS4ERR_DENIED)
3221                 return decode_lock_denied(xdr, NULL);
3222         return status;
3223 }
3224
3225 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3226 {
3227         int status;
3228         status = decode_op_hdr(xdr, OP_LOCKT);
3229         if (status == -NFS4ERR_DENIED)
3230                 return decode_lock_denied(xdr, res->denied);
3231         return status;
3232 }
3233
3234 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3235 {
3236         __be32 *p;
3237         int status;
3238
3239         status = decode_op_hdr(xdr, OP_LOCKU);
3240         if (status == 0) {
3241                 READ_BUF(NFS4_STATEID_SIZE);
3242                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3243         }
3244         return status;
3245 }
3246
3247 static int decode_lookup(struct xdr_stream *xdr)
3248 {
3249         return decode_op_hdr(xdr, OP_LOOKUP);
3250 }
3251
3252 /* This is too sick! */
3253 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3254 {
3255         __be32 *p;
3256         uint32_t limit_type, nblocks, blocksize;
3257
3258         READ_BUF(12);
3259         READ32(limit_type);
3260         switch (limit_type) {
3261                 case 1:
3262                         READ64(*maxsize);
3263                         break;
3264                 case 2:
3265                         READ32(nblocks);
3266                         READ32(blocksize);
3267                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3268         }
3269         return 0;
3270 }
3271
3272 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3273 {
3274         __be32 *p;
3275         uint32_t delegation_type;
3276
3277         READ_BUF(4);
3278         READ32(delegation_type);
3279         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3280                 res->delegation_type = 0;
3281                 return 0;
3282         }
3283         READ_BUF(NFS4_STATEID_SIZE+4);
3284         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3285         READ32(res->do_recall);
3286         switch (delegation_type) {
3287                 case NFS4_OPEN_DELEGATE_READ:
3288                         res->delegation_type = FMODE_READ;
3289                         break;
3290                 case NFS4_OPEN_DELEGATE_WRITE:
3291                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3292                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3293                                 return -EIO;
3294         }
3295         return decode_ace(xdr, NULL, res->server->nfs_client);
3296 }
3297
3298 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3299 {
3300         __be32 *p;
3301         uint32_t savewords, bmlen, i;
3302         int status;
3303
3304         status = decode_op_hdr(xdr, OP_OPEN);
3305         if (status)
3306                 return status;
3307         READ_BUF(NFS4_STATEID_SIZE);
3308         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3309
3310         decode_change_info(xdr, &res->cinfo);
3311
3312         READ_BUF(8);
3313         READ32(res->rflags);
3314         READ32(bmlen);
3315         if (bmlen > 10)
3316                 goto xdr_error;
3317
3318         READ_BUF(bmlen << 2);
3319         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3320         for (i = 0; i < savewords; ++i)
3321                 READ32(res->attrset[i]);
3322         for (; i < NFS4_BITMAP_SIZE; i++)
3323                 res->attrset[i] = 0;
3324
3325         return decode_delegation(xdr, res);
3326 xdr_error:
3327         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3328         return -EIO;
3329 }
3330
3331 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3332 {
3333         __be32 *p;
3334         int status;
3335
3336         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3337         if (status)
3338                 return status;
3339         READ_BUF(NFS4_STATEID_SIZE);
3340         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3341         return 0;
3342 }
3343
3344 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3345 {
3346         __be32 *p;
3347         int status;
3348
3349         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3350         if (status)
3351                 return status;
3352         READ_BUF(NFS4_STATEID_SIZE);
3353         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3354         return 0;
3355 }
3356
3357 static int decode_putfh(struct xdr_stream *xdr)
3358 {
3359         return decode_op_hdr(xdr, OP_PUTFH);
3360 }
3361
3362 static int decode_putrootfh(struct xdr_stream *xdr)
3363 {
3364         return decode_op_hdr(xdr, OP_PUTROOTFH);
3365 }
3366
3367 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3368 {
3369         struct kvec *iov = req->rq_rcv_buf.head;
3370         __be32 *p;
3371         uint32_t count, eof, recvd, hdrlen;
3372         int status;
3373
3374         status = decode_op_hdr(xdr, OP_READ);
3375         if (status)
3376                 return status;
3377         READ_BUF(8);
3378         READ32(eof);
3379         READ32(count);
3380         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3381         recvd = req->rq_rcv_buf.len - hdrlen;
3382         if (count > recvd) {
3383                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3384                                 "count %u > recvd %u\n", count, recvd);
3385                 count = recvd;
3386                 eof = 0;
3387         }
3388         xdr_read_pages(xdr, count);
3389         res->eof = eof;
3390         res->count = count;
3391         return 0;
3392 }
3393
3394 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3395 {
3396         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3397         struct page     *page = *rcvbuf->pages;
3398         struct kvec     *iov = rcvbuf->head;
3399         unsigned int    nr, pglen = rcvbuf->page_len;
3400         __be32          *end, *entry, *p, *kaddr;
3401         uint32_t        len, attrlen, xlen;
3402         int             hdrlen, recvd, status;
3403
3404         status = decode_op_hdr(xdr, OP_READDIR);
3405         if (status)
3406                 return status;
3407         READ_BUF(8);
3408         COPYMEM(readdir->verifier.data, 8);
3409         dprintk("%s: verifier = 0x%x%x\n",
3410                         __FUNCTION__,
3411                         ((u32 *)readdir->verifier.data)[0],
3412                         ((u32 *)readdir->verifier.data)[1]);
3413
3414
3415         hdrlen = (char *) p - (char *) iov->iov_base;
3416         recvd = rcvbuf->len - hdrlen;
3417         if (pglen > recvd)
3418                 pglen = recvd;
3419         xdr_read_pages(xdr, pglen);
3420
3421         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3422         kaddr = p = kmap_atomic(page, KM_USER0);
3423         end = p + ((pglen + readdir->pgbase) >> 2);
3424         entry = p;
3425         for (nr = 0; *p++; nr++) {
3426                 if (end - p < 3)
3427                         goto short_pkt;
3428                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3429                 p += 2;                 /* cookie */
3430                 len = ntohl(*p++);      /* filename length */
3431                 if (len > NFS4_MAXNAMLEN) {
3432                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3433                         goto err_unmap;
3434                 }
3435                 xlen = XDR_QUADLEN(len);
3436                 if (end - p < xlen + 1)
3437                         goto short_pkt;
3438                 dprintk("filename = %*s\n", len, (char *)p);
3439                 p += xlen;
3440                 len = ntohl(*p++);      /* bitmap length */
3441                 if (end - p < len + 1)
3442                         goto short_pkt;
3443                 p += len;
3444                 attrlen = XDR_QUADLEN(ntohl(*p++));
3445                 if (end - p < attrlen + 2)
3446                         goto short_pkt;
3447                 p += attrlen;           /* attributes */
3448                 entry = p;
3449         }
3450         if (!nr && (entry[0] != 0 || entry[1] == 0))
3451                 goto short_pkt;
3452 out:
3453         kunmap_atomic(kaddr, KM_USER0);
3454         return 0;
3455 short_pkt:
3456         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3457         entry[0] = entry[1] = 0;
3458         /* truncate listing ? */
3459         if (!nr) {
3460                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3461                 entry[1] = 1;
3462         }
3463         goto out;
3464 err_unmap:
3465         kunmap_atomic(kaddr, KM_USER0);
3466         return -errno_NFSERR_IO;
3467 }
3468
3469 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3470 {
3471         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3472         struct kvec *iov = rcvbuf->head;
3473         int hdrlen, len, recvd;
3474         __be32 *p;
3475         char *kaddr;
3476         int status;
3477
3478         status = decode_op_hdr(xdr, OP_READLINK);
3479         if (status)
3480                 return status;
3481
3482         /* Convert length of symlink */
3483         READ_BUF(4);
3484         READ32(len);
3485         if (len >= rcvbuf->page_len || len <= 0) {
3486                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3487                 return -ENAMETOOLONG;
3488         }
3489         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3490         recvd = req->rq_rcv_buf.len - hdrlen;
3491         if (recvd < len) {
3492                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3493                                 "count %u > recvd %u\n", len, recvd);
3494                 return -EIO;
3495         }
3496         xdr_read_pages(xdr, len);
3497         /*
3498          * The XDR encode routine has set things up so that
3499          * the link text will be copied directly into the
3500          * buffer.  We just have to do overflow-checking,
3501          * and and null-terminate the text (the VFS expects
3502          * null-termination).
3503          */
3504         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3505         kaddr[len+rcvbuf->page_base] = '\0';
3506         kunmap_atomic(kaddr, KM_USER0);
3507         return 0;
3508 }
3509
3510 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3511 {
3512         int status;
3513
3514         status = decode_op_hdr(xdr, OP_REMOVE);
3515         if (status)
3516                 goto out;
3517         status = decode_change_info(xdr, cinfo);
3518 out:
3519         return status;
3520 }
3521
3522 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3523               struct nfs4_change_info *new_cinfo)
3524 {
3525         int status;
3526
3527         status = decode_op_hdr(xdr, OP_RENAME);
3528         if (status)
3529                 goto out;
3530         if ((status = decode_change_info(xdr, old_cinfo)))
3531                 goto out;
3532         status = decode_change_info(xdr, new_cinfo);
3533 out:
3534         return status;
3535 }
3536
3537 static int decode_renew(struct xdr_stream *xdr)
3538 {
3539         return decode_op_hdr(xdr, OP_RENEW);
3540 }
3541
3542 static int
3543 decode_restorefh(struct xdr_stream *xdr)
3544 {
3545         return decode_op_hdr(xdr, OP_RESTOREFH);
3546 }
3547
3548 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3549                 size_t *acl_len)
3550 {
3551         __be32 *savep;
3552         uint32_t attrlen,
3553                  bitmap[2] = {0};
3554         struct kvec *iov = req->rq_rcv_buf.head;
3555         int status;
3556
3557         *acl_len = 0;
3558         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3559                 goto out;
3560         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3561                 goto out;
3562         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3563                 goto out;
3564
3565         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3566                 return -EIO;
3567         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3568                 int hdrlen, recvd;
3569
3570                 /* We ignore &savep and don't do consistency checks on
3571                  * the attr length.  Let userspace figure it out.... */
3572                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3573                 recvd = req->rq_rcv_buf.len - hdrlen;
3574                 if (attrlen > recvd) {
3575                         printk(KERN_WARNING "NFS: server cheating in getattr"
3576                                         " acl reply: attrlen %u > recvd %u\n",
3577                                         attrlen, recvd);
3578                         return -EINVAL;
3579                 }
3580                 xdr_read_pages(xdr, attrlen);
3581                 *acl_len = attrlen;
3582         } else
3583                 status = -EOPNOTSUPP;
3584
3585 out:
3586         return status;
3587 }
3588
3589 static int
3590 decode_savefh(struct xdr_stream *xdr)
3591 {
3592         return decode_op_hdr(xdr, OP_SAVEFH);
3593 }
3594
3595 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3596 {
3597         __be32 *p;
3598         uint32_t bmlen;
3599         int status;
3600
3601
3602         status = decode_op_hdr(xdr, OP_SETATTR);
3603         if (status)
3604                 return status;
3605         READ_BUF(4);
3606         READ32(bmlen);
3607         READ_BUF(bmlen << 2);
3608         return 0;
3609 }
3610
3611 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3612 {
3613         __be32 *p;
3614         uint32_t opnum;
3615         int32_t nfserr;
3616
3617         READ_BUF(8);
3618         READ32(opnum);
3619         if (opnum != OP_SETCLIENTID) {
3620                 printk(KERN_NOTICE
3621                                 "nfs4_decode_setclientid: Server returned operation"
3622                                 " %d\n", opnum);
3623                 return -EIO;
3624         }
3625         READ32(nfserr);
3626         if (nfserr == NFS_OK) {
3627                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3628                 READ64(clp->cl_clientid);
3629                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3630         } else if (nfserr == NFSERR_CLID_INUSE) {
3631                 uint32_t len;
3632
3633                 /* skip netid string */
3634                 READ_BUF(4);
3635                 READ32(len);
3636                 READ_BUF(len);
3637
3638                 /* skip uaddr string */
3639                 READ_BUF(4);
3640                 READ32(len);
3641                 READ_BUF(len);
3642                 return -NFSERR_CLID_INUSE;
3643         } else
3644                 return -nfs4_stat_to_errno(nfserr);
3645
3646         return 0;
3647 }
3648
3649 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3650 {
3651         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3652 }
3653
3654 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3655 {
3656         __be32 *p;
3657         int status;
3658
3659         status = decode_op_hdr(xdr, OP_WRITE);
3660         if (status)
3661                 return status;
3662
3663         READ_BUF(16);
3664         READ32(res->count);
3665         READ32(res->verf->committed);
3666         COPYMEM(res->verf->verifier, 8);
3667         return 0;
3668 }
3669
3670 static int decode_delegreturn(struct xdr_stream *xdr)
3671 {
3672         return decode_op_hdr(xdr, OP_DELEGRETURN);
3673 }
3674
3675 /*
3676  * Decode OPEN_DOWNGRADE response
3677  */
3678 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3679 {
3680         struct xdr_stream xdr;
3681         struct compound_hdr hdr;
3682         int status;
3683
3684         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3685         status = decode_compound_hdr(&xdr, &hdr);
3686         if (status)
3687                 goto out;
3688         status = decode_putfh(&xdr);
3689         if (status)
3690                 goto out;
3691         status = decode_open_downgrade(&xdr, res);
3692         if (status != 0)
3693                 goto out;
3694         decode_getfattr(&xdr, res->fattr, res->server);
3695 out:
3696         return status;
3697 }
3698
3699 /*
3700  * END OF "GENERIC" DECODE ROUTINES.
3701  */
3702
3703 /*
3704  * Decode ACCESS response
3705  */
3706 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3707 {
3708         struct xdr_stream xdr;
3709         struct compound_hdr hdr;
3710         int status;
3711
3712         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3713         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3714                 goto out;
3715         if ((status = decode_putfh(&xdr)) == 0)
3716                 status = decode_access(&xdr, res);
3717 out:
3718         return status;
3719 }
3720
3721 /*
3722  * Decode LOOKUP response
3723  */
3724 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3725 {
3726         struct xdr_stream xdr;
3727         struct compound_hdr hdr;
3728         int status;
3729
3730         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3731         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3732                 goto out;
3733         if ((status = decode_putfh(&xdr)) != 0)
3734                 goto out;
3735         if ((status = decode_lookup(&xdr)) != 0)
3736                 goto out;
3737         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3738                 goto out;
3739         status = decode_getfattr(&xdr, res->fattr, res->server);
3740 out:
3741         return status;
3742 }
3743
3744 /*
3745  * Decode LOOKUP_ROOT response
3746  */
3747 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3748 {
3749         struct xdr_stream xdr;
3750         struct compound_hdr hdr;
3751         int status;
3752
3753         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3754         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3755                 goto out;
3756         if ((status = decode_putrootfh(&xdr)) != 0)
3757                 goto out;
3758         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3759                 status = decode_getfattr(&xdr, res->fattr, res->server);
3760 out:
3761         return status;
3762 }
3763
3764 /*
3765  * Decode REMOVE response
3766  */
3767 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
3768 {
3769         struct xdr_stream xdr;
3770         struct compound_hdr hdr;
3771         int status;
3772
3773         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3774         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3775                 goto out;
3776         if ((status = decode_putfh(&xdr)) != 0)
3777                 goto out;
3778         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3779                 goto out;
3780         decode_getfattr(&xdr, res->dir_attr, res->server);
3781 out:
3782         return status;
3783 }
3784
3785 /*
3786  * Decode RENAME response
3787  */
3788 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3789 {
3790         struct xdr_stream xdr;
3791         struct compound_hdr hdr;
3792         int status;
3793
3794         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3795         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3796                 goto out;
3797         if ((status = decode_putfh(&xdr)) != 0)
3798                 goto out;
3799         if ((status = decode_savefh(&xdr)) != 0)
3800                 goto out;
3801         if ((status = decode_putfh(&xdr)) != 0)
3802                 goto out;
3803         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3804                 goto out;
3805         /* Current FH is target directory */
3806         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3807                 goto out;
3808         if ((status = decode_restorefh(&xdr)) != 0)
3809                 goto out;
3810         decode_getfattr(&xdr, res->old_fattr, res->server);
3811 out:
3812         return status;
3813 }
3814
3815 /*
3816  * Decode LINK response
3817  */
3818 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3819 {
3820         struct xdr_stream xdr;
3821         struct compound_hdr hdr;
3822         int status;
3823
3824         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3825         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3826                 goto out;
3827         if ((status = decode_putfh(&xdr)) != 0)
3828                 goto out;
3829         if ((status = decode_savefh(&xdr)) != 0)
3830                 goto out;
3831         if ((status = decode_putfh(&xdr)) != 0)
3832                 goto out;
3833         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3834                 goto out;
3835         /*
3836          * Note order: OP_LINK leaves the directory as the current
3837          *             filehandle.
3838          */
3839         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3840                 goto out;
3841         if ((status = decode_restorefh(&xdr)) != 0)
3842                 goto out;
3843         decode_getfattr(&xdr, res->fattr, res->server);
3844 out:
3845         return status;
3846 }
3847
3848 /*
3849  * Decode CREATE response
3850  */
3851 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3852 {
3853         struct xdr_stream xdr;
3854         struct compound_hdr hdr;
3855         int status;
3856
3857         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3858         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3859                 goto out;
3860         if ((status = decode_putfh(&xdr)) != 0)
3861                 goto out;
3862         if ((status = decode_savefh(&xdr)) != 0)
3863                 goto out;
3864         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3865                 goto out;
3866         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3867                 goto out;
3868         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3869                 goto out;
3870         if ((status = decode_restorefh(&xdr)) != 0)
3871                 goto out;
3872         decode_getfattr(&xdr, res->dir_fattr, res->server);
3873 out:
3874         return status;
3875 }
3876
3877 /*
3878  * Decode SYMLINK response
3879  */
3880 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3881 {
3882         return nfs4_xdr_dec_create(rqstp, p, res);
3883 }
3884
3885 /*
3886  * Decode GETATTR response
3887  */
3888 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3889 {
3890         struct xdr_stream xdr;
3891         struct compound_hdr hdr;
3892         int status;
3893
3894         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3895         status = decode_compound_hdr(&xdr, &hdr);
3896         if (status)
3897                 goto out;
3898         status = decode_putfh(&xdr);
3899         if (status)
3900                 goto out;
3901         status = decode_getfattr(&xdr, res->fattr, res->server);
3902 out:
3903         return status;
3904
3905 }
3906
3907 /*
3908  * Encode an SETACL request
3909  */
3910 static int
3911 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3912 {
3913         struct xdr_stream xdr;
3914         struct compound_hdr hdr = {
3915                 .nops   = 2,
3916         };
3917         int status;
3918
3919         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3920         encode_compound_hdr(&xdr, &hdr);
3921         status = encode_putfh(&xdr, args->fh);
3922         if (status)
3923                 goto out;
3924         status = encode_setacl(&xdr, args);
3925 out:
3926         return status;
3927 }
3928 /*
3929  * Decode SETACL response
3930  */
3931 static int
3932 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3933 {
3934         struct xdr_stream xdr;
3935         struct compound_hdr hdr;
3936         int status;
3937
3938         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3939         status = decode_compound_hdr(&xdr, &hdr);
3940         if (status)
3941                 goto out;
3942         status = decode_putfh(&xdr);
3943         if (status)
3944                 goto out;
3945         status = decode_setattr(&xdr, res);
3946 out:
3947         return status;
3948 }
3949
3950 /*
3951  * Decode GETACL response
3952  */
3953 static int
3954 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3955 {
3956         struct xdr_stream xdr;
3957         struct compound_hdr hdr;
3958         int status;
3959
3960         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3961         status = decode_compound_hdr(&xdr, &hdr);
3962         if (status)
3963                 goto out;
3964         status = decode_putfh(&xdr);
3965         if (status)
3966                 goto out;
3967         status = decode_getacl(&xdr, rqstp, acl_len);
3968
3969 out:
3970         return status;
3971 }
3972
3973 /*
3974  * Decode CLOSE response
3975  */
3976 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3977 {
3978         struct xdr_stream xdr;
3979         struct compound_hdr hdr;
3980         int status;
3981
3982         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3983         status = decode_compound_hdr(&xdr, &hdr);
3984         if (status)
3985                 goto out;
3986         status = decode_putfh(&xdr);
3987         if (status)
3988                 goto out;
3989         status = decode_close(&xdr, res);
3990         if (status != 0)
3991                 goto out;
3992         /*
3993          * Note: Server may do delete on close for this file
3994          *      in which case the getattr call will fail with
3995          *      an ESTALE error. Shouldn't be a problem,
3996          *      though, since fattr->valid will remain unset.
3997          */
3998         decode_getfattr(&xdr, res->fattr, res->server);
3999 out:
4000         return status;
4001 }
4002
4003 /*
4004  * Decode OPEN response
4005  */
4006 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4007 {
4008         struct xdr_stream xdr;
4009         struct compound_hdr hdr;
4010         int status;
4011
4012         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4013         status = decode_compound_hdr(&xdr, &hdr);
4014         if (status)
4015                 goto out;
4016         status = decode_putfh(&xdr);
4017         if (status)
4018                 goto out;
4019         status = decode_savefh(&xdr);
4020         if (status)
4021                 goto out;
4022         status = decode_open(&xdr, res);
4023         if (status)
4024                 goto out;
4025         status = decode_getfh(&xdr, &res->fh);
4026         if (status)
4027                 goto out;
4028         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4029                 goto out;
4030         if ((status = decode_restorefh(&xdr)) != 0)
4031                 goto out;
4032         decode_getfattr(&xdr, res->dir_attr, res->server);
4033 out:
4034         return status;
4035 }
4036
4037 /*
4038  * Decode OPEN_CONFIRM response
4039  */
4040 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4041 {
4042         struct xdr_stream xdr;
4043         struct compound_hdr hdr;
4044         int status;
4045
4046         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4047         status = decode_compound_hdr(&xdr, &hdr);
4048         if (status)
4049                 goto out;
4050         status = decode_putfh(&xdr);
4051         if (status)
4052                 goto out;
4053         status = decode_open_confirm(&xdr, res);
4054 out:
4055         return status;
4056 }
4057
4058 /*
4059  * Decode OPEN response
4060  */
4061 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4062 {
4063         struct xdr_stream xdr;
4064         struct compound_hdr hdr;
4065         int status;
4066
4067         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4068         status = decode_compound_hdr(&xdr, &hdr);
4069         if (status)
4070                 goto out;
4071         status = decode_putfh(&xdr);
4072         if (status)
4073                 goto out;
4074         status = decode_open(&xdr, res);
4075         if (status)
4076                 goto out;
4077         decode_getfattr(&xdr, res->f_attr, res->server);
4078 out:
4079         return status;
4080 }
4081
4082 /*
4083  * Decode SETATTR response
4084  */
4085 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4086 {
4087         struct xdr_stream xdr;
4088         struct compound_hdr hdr;
4089         int status;
4090
4091         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4092         status = decode_compound_hdr(&xdr, &hdr);
4093         if (status)
4094                 goto out;
4095         status = decode_putfh(&xdr);
4096         if (status)
4097                 goto out;
4098         status = decode_setattr(&xdr, res);
4099         if (status)
4100                 goto out;
4101         status = decode_getfattr(&xdr, res->fattr, res->server);
4102         if (status == NFS4ERR_DELAY)
4103                 status = 0;
4104 out:
4105         return status;
4106 }
4107
4108 /*
4109  * Decode LOCK response
4110  */
4111 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4112 {
4113         struct xdr_stream xdr;
4114         struct compound_hdr hdr;
4115         int status;
4116
4117         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4118         status = decode_compound_hdr(&xdr, &hdr);
4119         if (status)
4120                 goto out;
4121         status = decode_putfh(&xdr);
4122         if (status)
4123                 goto out;
4124         status = decode_lock(&xdr, res);
4125 out:
4126         return status;
4127 }
4128
4129 /*
4130  * Decode LOCKT response
4131  */
4132 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4133 {
4134         struct xdr_stream xdr;
4135         struct compound_hdr hdr;
4136         int status;
4137
4138         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4139         status = decode_compound_hdr(&xdr, &hdr);
4140         if (status)
4141                 goto out;
4142         status = decode_putfh(&xdr);
4143         if (status)
4144                 goto out;
4145         status = decode_lockt(&xdr, res);
4146 out:
4147         return status;
4148 }
4149
4150 /*
4151  * Decode LOCKU response
4152  */
4153 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4154 {
4155         struct xdr_stream xdr;
4156         struct compound_hdr hdr;
4157         int status;
4158
4159         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4160         status = decode_compound_hdr(&xdr, &hdr);
4161         if (status)
4162                 goto out;
4163         status = decode_putfh(&xdr);
4164         if (status)
4165                 goto out;
4166         status = decode_locku(&xdr, res);
4167 out:
4168         return status;
4169 }
4170
4171 /*
4172  * Decode READLINK response
4173  */
4174 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4175 {
4176         struct xdr_stream xdr;
4177         struct compound_hdr hdr;
4178         int status;
4179
4180         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4181         status = decode_compound_hdr(&xdr, &hdr);
4182         if (status)
4183                 goto out;
4184         status = decode_putfh(&xdr);
4185         if (status)
4186                 goto out;
4187         status = decode_readlink(&xdr, rqstp);
4188 out:
4189         return status;
4190 }
4191
4192 /*
4193  * Decode READDIR response
4194  */
4195 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4196 {
4197         struct xdr_stream xdr;
4198         struct compound_hdr hdr;
4199         int status;
4200
4201         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4202         status = decode_compound_hdr(&xdr, &hdr);
4203         if (status)
4204                 goto out;
4205         status = decode_putfh(&xdr);
4206         if (status)
4207                 goto out;
4208         status = decode_readdir(&xdr, rqstp, res);
4209 out:
4210         return status;
4211 }
4212
4213 /*
4214  * Decode Read response
4215  */
4216 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4217 {
4218         struct xdr_stream xdr;
4219         struct compound_hdr hdr;
4220         int status;
4221
4222         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4223         status = decode_compound_hdr(&xdr, &hdr);
4224         if (status)
4225                 goto out;
4226         status = decode_putfh(&xdr);
4227         if (status)
4228                 goto out;
4229         status = decode_read(&xdr, rqstp, res);
4230         if (!status)
4231                 status = res->count;
4232 out:
4233         return status;
4234 }
4235
4236 /*
4237  * Decode WRITE response
4238  */
4239 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4240 {
4241         struct xdr_stream xdr;
4242         struct compound_hdr hdr;
4243         int status;
4244
4245         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4246         status = decode_compound_hdr(&xdr, &hdr);
4247         if (status)
4248                 goto out;
4249         status = decode_putfh(&xdr);
4250         if (status)
4251                 goto out;
4252         status = decode_write(&xdr, res);
4253         if (status)
4254                 goto out;
4255         decode_getfattr(&xdr, res->fattr, res->server);
4256         if (!status)
4257                 status = res->count;
4258 out:
4259         return status;
4260 }
4261
4262 /*
4263  * Decode COMMIT response
4264  */
4265 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4266 {
4267         struct xdr_stream xdr;
4268         struct compound_hdr hdr;
4269         int status;
4270
4271         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4272         status = decode_compound_hdr(&xdr, &hdr);
4273         if (status)
4274                 goto out;
4275         status = decode_putfh(&xdr);
4276         if (status)
4277                 goto out;
4278         status = decode_commit(&xdr, res);
4279         if (status)
4280                 goto out;
4281         decode_getfattr(&xdr, res->fattr, res->server);
4282 out:
4283         return status;
4284 }
4285
4286 /*
4287  * FSINFO request
4288  */
4289 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4290 {
4291         struct xdr_stream xdr;
4292         struct compound_hdr hdr;
4293         int status;
4294
4295         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4296         status = decode_compound_hdr(&xdr, &hdr);
4297         if (!status)
4298                 status = decode_putfh(&xdr);
4299         if (!status)
4300                 status = decode_fsinfo(&xdr, fsinfo);
4301         if (!status)
4302                 status = -nfs4_stat_to_errno(hdr.status);
4303         return status;
4304 }
4305
4306 /*
4307  * PATHCONF request
4308  */
4309 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
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         status = decode_compound_hdr(&xdr, &hdr);
4317         if (!status)
4318                 status = decode_putfh(&xdr);
4319         if (!status)
4320                 status = decode_pathconf(&xdr, pathconf);
4321         return status;
4322 }
4323
4324 /*
4325  * STATFS request
4326  */
4327 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4328 {
4329         struct xdr_stream xdr;
4330         struct compound_hdr hdr;
4331         int status;
4332
4333         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4334         status = decode_compound_hdr(&xdr, &hdr);
4335         if (!status)
4336                 status = decode_putfh(&xdr);
4337         if (!status)
4338                 status = decode_statfs(&xdr, fsstat);
4339         return status;
4340 }
4341
4342 /*
4343  * GETATTR_BITMAP request
4344  */
4345 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
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         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4353                 goto out;
4354         if ((status = decode_putfh(&xdr)) != 0)
4355                 goto out;
4356         status = decode_server_caps(&xdr, res);
4357 out:
4358         return status;
4359 }
4360
4361 /*
4362  * Decode RENEW response
4363  */
4364 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4365 {
4366         struct xdr_stream xdr;
4367         struct compound_hdr hdr;
4368         int status;
4369
4370         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4371         status = decode_compound_hdr(&xdr, &hdr);
4372         if (!status)
4373                 status = decode_renew(&xdr);
4374         return status;
4375 }
4376
4377 /*
4378  * a SETCLIENTID request
4379  */
4380 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4381                 struct nfs_client *clp)
4382 {
4383         struct xdr_stream xdr;
4384         struct compound_hdr hdr;
4385         int status;
4386
4387         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4388         status = decode_compound_hdr(&xdr, &hdr);
4389         if (!status)
4390                 status = decode_setclientid(&xdr, clp);
4391         if (!status)
4392                 status = -nfs4_stat_to_errno(hdr.status);
4393         return status;
4394 }
4395
4396 /*
4397  * a SETCLIENTID_CONFIRM request
4398  */
4399 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4400 {
4401         struct xdr_stream xdr;
4402         struct compound_hdr hdr;
4403         int status;
4404
4405         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4406         status = decode_compound_hdr(&xdr, &hdr);
4407         if (!status)
4408                 status = decode_setclientid_confirm(&xdr);
4409         if (!status)
4410                 status = decode_putrootfh(&xdr);
4411         if (!status)
4412                 status = decode_fsinfo(&xdr, fsinfo);
4413         if (!status)
4414                 status = -nfs4_stat_to_errno(hdr.status);
4415         return status;
4416 }
4417
4418 /*
4419  * DELEGRETURN request
4420  */
4421 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4422 {
4423         struct xdr_stream xdr;
4424         struct compound_hdr hdr;
4425         int status;
4426
4427         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4428         status = decode_compound_hdr(&xdr, &hdr);
4429         if (status != 0)
4430                 goto out;
4431         status = decode_putfh(&xdr);
4432         if (status != 0)
4433                 goto out;
4434         status = decode_delegreturn(&xdr);
4435         decode_getfattr(&xdr, res->fattr, res->server);
4436 out:
4437         return status;
4438 }
4439
4440 /*
4441  * FS_LOCATIONS request
4442  */
4443 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4444 {
4445         struct xdr_stream xdr;
4446         struct compound_hdr hdr;
4447         int status;
4448
4449         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4450         status = decode_compound_hdr(&xdr, &hdr);
4451         if (status != 0)
4452                 goto out;
4453         if ((status = decode_putfh(&xdr)) != 0)
4454                 goto out;
4455         if ((status = decode_lookup(&xdr)) != 0)
4456                 goto out;
4457         xdr_enter_page(&xdr, PAGE_SIZE);
4458         status = decode_getfattr(&xdr, &res->fattr, res->server);
4459 out:
4460         return status;
4461 }
4462
4463 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4464 {
4465         uint32_t bitmap[2] = {0};
4466         uint32_t len;
4467
4468         if (!*p++) {
4469                 if (!*p)
4470                         return ERR_PTR(-EAGAIN);
4471                 entry->eof = 1;
4472                 return ERR_PTR(-EBADCOOKIE);
4473         }
4474
4475         entry->prev_cookie = entry->cookie;
4476         p = xdr_decode_hyper(p, &entry->cookie);
4477         entry->len = ntohl(*p++);
4478         entry->name = (const char *) p;
4479         p += XDR_QUADLEN(entry->len);
4480
4481         /*
4482          * In case the server doesn't return an inode number,
4483          * we fake one here.  (We don't use inode number 0,
4484          * since glibc seems to choke on it...)
4485          */
4486         entry->ino = 1;
4487
4488         len = ntohl(*p++);              /* bitmap length */
4489         if (len-- > 0) {
4490                 bitmap[0] = ntohl(*p++);
4491                 if (len-- > 0) {
4492                         bitmap[1] = ntohl(*p++);
4493                         p += len;
4494                 }
4495         }
4496         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4497         if (len > 0) {
4498                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4499                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4500                         /* Ignore the return value of rdattr_error for now */
4501                         p++;
4502                         len--;
4503                 }
4504                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4505                         xdr_decode_hyper(p, &entry->ino);
4506                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4507                         xdr_decode_hyper(p, &entry->ino);
4508                 p += len;
4509         }
4510
4511         entry->eof = !p[0] && p[1];
4512         return p;
4513 }
4514
4515 /*
4516  * We need to translate between nfs status return values and
4517  * the local errno values which may not be the same.
4518  */
4519 static struct {
4520         int stat;
4521         int errno;
4522 } nfs_errtbl[] = {
4523         { NFS4_OK,              0               },
4524         { NFS4ERR_PERM,         EPERM           },
4525         { NFS4ERR_NOENT,        ENOENT          },
4526         { NFS4ERR_IO,           errno_NFSERR_IO },
4527         { NFS4ERR_NXIO,         ENXIO           },
4528         { NFS4ERR_ACCESS,       EACCES          },
4529         { NFS4ERR_EXIST,        EEXIST          },
4530         { NFS4ERR_XDEV,         EXDEV           },
4531         { NFS4ERR_NOTDIR,       ENOTDIR         },
4532         { NFS4ERR_ISDIR,        EISDIR          },
4533         { NFS4ERR_INVAL,        EINVAL          },
4534         { NFS4ERR_FBIG,         EFBIG           },
4535         { NFS4ERR_NOSPC,        ENOSPC          },
4536         { NFS4ERR_ROFS,         EROFS           },
4537         { NFS4ERR_MLINK,        EMLINK          },
4538         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4539         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4540         { NFS4ERR_DQUOT,        EDQUOT          },
4541         { NFS4ERR_STALE,        ESTALE          },
4542         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4543         { NFS4ERR_BADOWNER,     EINVAL          },
4544         { NFS4ERR_BADNAME,      EINVAL          },
4545         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4546         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4547         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4548         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4549         { NFS4ERR_BADTYPE,      EBADTYPE        },
4550         { NFS4ERR_LOCKED,       EAGAIN          },
4551         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4552         { NFS4ERR_SYMLINK,      ELOOP           },
4553         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4554         { NFS4ERR_DEADLOCK,     EDEADLK         },
4555         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4556                                                     * to be handled by a
4557                                                     * middle-layer.
4558                                                     */
4559         { -1,                   EIO             }
4560 };
4561
4562 /*
4563  * Convert an NFS error code to a local one.
4564  * This one is used jointly by NFSv2 and NFSv3.
4565  */
4566 static int
4567 nfs4_stat_to_errno(int stat)
4568 {
4569         int i;
4570         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4571                 if (nfs_errtbl[i].stat == stat)
4572                         return nfs_errtbl[i].errno;
4573         }
4574         if (stat <= 10000 || stat > 10100) {
4575                 /* The server is looney tunes. */
4576                 return ESERVERFAULT;
4577         }
4578         /* If we cannot translate the error, the recovery routines should
4579          * handle it.
4580          * Note: remaining NFSv4 error codes have values > 10000, so should
4581          * not conflict with native Linux error codes.
4582          */
4583         return stat;
4584 }
4585
4586 #define PROC(proc, argtype, restype)                            \
4587 [NFSPROC4_CLNT_##proc] = {                                      \
4588         .p_proc   = NFSPROC4_COMPOUND,                          \
4589         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4590         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4591         .p_arglen = NFS4_##argtype##_sz,                        \
4592         .p_replen = NFS4_##restype##_sz,                        \
4593         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4594         .p_name   = #proc,                                      \
4595     }
4596
4597 struct rpc_procinfo     nfs4_procedures[] = {
4598   PROC(READ,            enc_read,       dec_read),
4599   PROC(WRITE,           enc_write,      dec_write),
4600   PROC(COMMIT,          enc_commit,     dec_commit),
4601   PROC(OPEN,            enc_open,       dec_open),
4602   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4603   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4604   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4605   PROC(CLOSE,           enc_close,      dec_close),
4606   PROC(SETATTR,         enc_setattr,    dec_setattr),
4607   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4608   PROC(RENEW,           enc_renew,      dec_renew),
4609   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4610   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4611   PROC(LOCK,            enc_lock,       dec_lock),
4612   PROC(LOCKT,           enc_lockt,      dec_lockt),
4613   PROC(LOCKU,           enc_locku,      dec_locku),
4614   PROC(ACCESS,          enc_access,     dec_access),
4615   PROC(GETATTR,         enc_getattr,    dec_getattr),
4616   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4617   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4618   PROC(REMOVE,          enc_remove,     dec_remove),
4619   PROC(RENAME,          enc_rename,     dec_rename),
4620   PROC(LINK,            enc_link,       dec_link),
4621   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4622   PROC(CREATE,          enc_create,     dec_create),
4623   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4624   PROC(STATFS,          enc_statfs,     dec_statfs),
4625   PROC(READLINK,        enc_readlink,   dec_readlink),
4626   PROC(READDIR,         enc_readdir,    dec_readdir),
4627   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4628   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4629   PROC(GETACL,          enc_getacl,     dec_getacl),
4630   PROC(SETACL,          enc_setacl,     dec_setacl),
4631   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4632 };
4633
4634 struct rpc_version              nfs_version4 = {
4635         .number                 = 4,
4636         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4637         .procs                  = nfs4_procedures
4638 };
4639
4640 /*
4641  * Local variables:
4642  *  c-basic-offset: 8
4643  * End:
4644  */