git.oblomov.eu 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 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 196                                 2 * nfs4_name_maxsz)
 197 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 198 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 199                                 nfs4_name_maxsz)
 200 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 201 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 202                                  7 + \
 203                                  1 + encode_stateid_maxsz + 8)
 204 #define decode_lock_denied_maxsz \
 205                                 (8 + decode_lockowner_maxsz)
 206 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 207                                  decode_lock_denied_maxsz)
 208 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 209 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 212                                  encode_stateid_maxsz + \
 213                                  4)
 214 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_stateid_maxsz)
 216 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 217 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 218 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 219                                 1 + nfs4_name_maxsz + \
 220                                 1 + \
 221                                 nfs4_fattr_maxsz)
 222 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 223 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 224                                 1 + 2 + nfs4_name_maxsz + \
 225                                 encode_attrs_maxsz)
 226 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 nfs4_fattr_bitmap_maxsz)
 229 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 230 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 233 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 234 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 235                                  nfs4_fattr_bitmap_maxsz + 1)
 236 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 237                                  encode_stateid_maxsz + 3)
 238 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 239 #define encode_fs_locations_maxsz \
 240                                 (encode_getattr_maxsz)
 241 #define decode_fs_locations_maxsz \
 242                                 (0)
 243 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 244 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 245 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 246                                 encode_putfh_maxsz + \
 247                                 encode_read_maxsz)
 248 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 249                                 decode_putfh_maxsz + \
 250                                 decode_read_maxsz)
 251 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 252                                 encode_putfh_maxsz + \
 253                                 encode_readlink_maxsz)
 254 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 decode_readlink_maxsz)
 257 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 258                                 encode_putfh_maxsz + \
 259                                 encode_readdir_maxsz)
 260 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_readdir_maxsz)
 263 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 264                                 encode_putfh_maxsz + \
 265                                 encode_write_maxsz + \
 266                                 encode_getattr_maxsz)
 267 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_write_maxsz + \
 270                                 decode_getattr_maxsz)
 271 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 encode_commit_maxsz + \
 274                                 encode_getattr_maxsz)
 275 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 276                                 decode_putfh_maxsz + \
 277                                 decode_commit_maxsz + \
 278                                 decode_getattr_maxsz)
 279 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_putfh_maxsz + \
 281                                 encode_savefh_maxsz + \
 282                                 encode_open_maxsz + \
 283                                 encode_getfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 encode_restorefh_maxsz + \
 286                                 encode_getattr_maxsz)
 287 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 288                                 decode_putfh_maxsz + \
 289                                 decode_savefh_maxsz + \
 290                                 decode_open_maxsz + \
 291                                 decode_getfh_maxsz + \
 292                                 decode_getattr_maxsz + \
 293                                 decode_restorefh_maxsz + \
 294                                 decode_getattr_maxsz)
 295 #define NFS4_enc_open_confirm_sz \
 296                                 (compound_encode_hdr_maxsz + \
 297                                  encode_putfh_maxsz + \
 298                                  encode_open_confirm_maxsz)
 299 #define NFS4_dec_open_confirm_sz \
 300                                 (compound_decode_hdr_maxsz + \
 301                                  decode_putfh_maxsz + \
 302                                  decode_open_confirm_maxsz)
 303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 304                                         encode_putfh_maxsz + \
 305                                         encode_open_maxsz + \
 306                                         encode_getattr_maxsz)
 307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 308                                         decode_putfh_maxsz + \
 309                                         decode_open_maxsz + \
 310                                         decode_getattr_maxsz)
 311 #define NFS4_enc_open_downgrade_sz \
 312                                 (compound_encode_hdr_maxsz + \
 313                                  encode_putfh_maxsz + \
 314                                  encode_open_downgrade_maxsz + \
 315                                  encode_getattr_maxsz)
 316 #define NFS4_dec_open_downgrade_sz \
 317                                 (compound_decode_hdr_maxsz + \
 318                                  decode_putfh_maxsz + \
 319                                  decode_open_downgrade_maxsz + \
 320                                  decode_getattr_maxsz)
 321 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 322                                  encode_putfh_maxsz + \
 323                                  encode_close_maxsz + \
 324                                  encode_getattr_maxsz)
 325 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 326                                  decode_putfh_maxsz + \
 327                                  decode_close_maxsz + \
 328                                  decode_getattr_maxsz)
 329 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 330                                  encode_putfh_maxsz + \
 331                                  encode_setattr_maxsz + \
 332                                  encode_getattr_maxsz)
 333 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 334                                  decode_putfh_maxsz + \
 335                                  decode_setattr_maxsz + \
 336                                  decode_getattr_maxsz)
 337 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_fsinfo_maxsz)
 340 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_fsinfo_maxsz)
 343 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 344                                 encode_renew_maxsz)
 345 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 346                                 decode_renew_maxsz)
 347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 348                                 encode_setclientid_maxsz)
 349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 350                                 decode_setclientid_maxsz)
 351 #define NFS4_enc_setclientid_confirm_sz \
 352                                 (compound_encode_hdr_maxsz + \
 353                                 encode_setclientid_confirm_maxsz + \
 354                                 encode_putrootfh_maxsz + \
 355                                 encode_fsinfo_maxsz)
 356 #define NFS4_dec_setclientid_confirm_sz \
 357                                 (compound_decode_hdr_maxsz + \
 358                                 decode_setclientid_confirm_maxsz + \
 359                                 decode_putrootfh_maxsz + \
 360                                 decode_fsinfo_maxsz)
 361 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_lock_maxsz)
 364 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_lock_maxsz)
 367 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_lockt_maxsz)
 370 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 371                                  decode_putfh_maxsz + \
 372                                  decode_lockt_maxsz)
 373 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_putfh_maxsz + \
 375                                 encode_locku_maxsz)
 376 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_locku_maxsz)
 379 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_access_maxsz + \
 382                                 encode_getattr_maxsz)
 383 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_access_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_getattr_maxsz)
 390 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 391                                 decode_putfh_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_lookup_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_getfh_maxsz)
 398 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 399                                 decode_putfh_maxsz + \
 400                                 decode_lookup_maxsz + \
 401                                 decode_getattr_maxsz + \
 402                                 decode_getfh_maxsz)
 403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 404                                 encode_putrootfh_maxsz + \
 405                                 encode_getattr_maxsz + \
 406                                 encode_getfh_maxsz)
 407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 408                                 decode_putrootfh_maxsz + \
 409                                 decode_getattr_maxsz + \
 410                                 decode_getfh_maxsz)
 411 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_remove_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_putfh_maxsz + \
 417                                 op_decode_hdr_maxsz + 5 + \
 418                                 decode_getattr_maxsz)
 419 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_savefh_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_rename_maxsz + \
 424                                 encode_getattr_maxsz + \
 425                                 encode_restorefh_maxsz + \
 426                                 encode_getattr_maxsz)
 427 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_savefh_maxsz + \
 430                                 decode_putfh_maxsz + \
 431                                 decode_rename_maxsz + \
 432                                 decode_getattr_maxsz + \
 433                                 decode_restorefh_maxsz + \
 434                                 decode_getattr_maxsz)
 435 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 436                                 encode_putfh_maxsz + \
 437                                 encode_savefh_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_link_maxsz + \
 440                                 decode_getattr_maxsz + \
 441                                 encode_restorefh_maxsz + \
 442                                 decode_getattr_maxsz)
 443 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_savefh_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_link_maxsz + \
 448                                 decode_getattr_maxsz + \
 449                                 decode_restorefh_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_putfh_maxsz + \
 453                                 encode_symlink_maxsz + \
 454                                 encode_getattr_maxsz + \
 455                                 encode_getfh_maxsz)
 456 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_symlink_maxsz + \
 459                                 decode_getattr_maxsz + \
 460                                 decode_getfh_maxsz)
 461 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_savefh_maxsz + \
 464                                 encode_create_maxsz + \
 465                                 encode_getfh_maxsz + \
 466                                 encode_getattr_maxsz + \
 467                                 encode_restorefh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_savefh_maxsz + \
 472                                 decode_create_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz + \
 475                                 decode_restorefh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 478                                 encode_putfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_statfs_maxsz)
 486 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_statfs_maxsz)
 489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_getattr_maxsz)
 492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_getattr_maxsz)
 495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 496                                 encode_putfh_maxsz + \
 497                                 encode_delegreturn_maxsz + \
 498                                 encode_getattr_maxsz)
 499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 500                                 decode_delegreturn_maxsz + \
 501                                 decode_getattr_maxsz)
 502 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_putfh_maxsz + \
 504                                 encode_getacl_maxsz)
 505 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_getacl_maxsz)
 508 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_setacl_maxsz)
 511 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 512                                 decode_putfh_maxsz + \
 513                                 decode_setacl_maxsz)
 514 #define NFS4_enc_fs_locations_sz \
 515                                 (compound_encode_hdr_maxsz + \
 516                                  encode_putfh_maxsz + \
 517                                  encode_lookup_maxsz + \
 518                                  encode_fs_locations_maxsz)
 519 #define NFS4_dec_fs_locations_sz \
 520                                 (compound_decode_hdr_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_lookup_maxsz + \
 523                                  decode_fs_locations_maxsz)
 524
 525 static struct {
 526         unsigned int    mode;
 527         unsigned int    nfs2type;
 528 } nfs_type2fmt[] = {
 529         { 0,            NFNON        },
 530         { S_IFREG,      NFREG        },
 531         { S_IFDIR,      NFDIR        },
 532         { S_IFBLK,      NFBLK        },
 533         { S_IFCHR,      NFCHR        },
 534         { S_IFLNK,      NFLNK        },
 535         { S_IFSOCK,     NFSOCK       },
 536         { S_IFIFO,      NFFIFO       },
 537         { 0,            NFNON        },
 538         { 0,            NFNON        },
 539 };
 540
 541 struct compound_hdr {
 542         int32_t         status;
 543         uint32_t        nops;
 544         uint32_t        taglen;
 545         char *          tag;
 546 };
 547
 548 /*
 549  * START OF "GENERIC" ENCODE ROUTINES.
 550  *   These may look a little ugly since they are imported from a "generic"
 551  * set of XDR encode/decode routines which are intended to be shared by
 552  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 553  *
 554  * If the pain of reading these is too great, it should be a straightforward
 555  * task to translate them into Linux-specific versions which are more
 556  * consistent with the style used in NFSv2/v3...
 557  */
 558 #define WRITE32(n)               *p++ = htonl(n)
 559 #define WRITE64(n)               do {                           \
 560         *p++ = htonl((uint32_t)((n) >> 32));                            \
 561         *p++ = htonl((uint32_t)(n));                                    \
 562 } while (0)
 563 #define WRITEMEM(ptr,nbytes)     do {                           \
 564         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 565 } while (0)
 566
 567 #define RESERVE_SPACE(nbytes)   do {                            \
 568         p = xdr_reserve_space(xdr, nbytes);                     \
 569         BUG_ON(!p);                                             \
 570 } while (0)
 571
 572 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 573 {
 574         __be32 *p;
 575
 576         p = xdr_reserve_space(xdr, 4 + len);
 577         BUG_ON(p == NULL);
 578         xdr_encode_opaque(p, str, len);
 579 }
 580
 581 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 582 {
 583         __be32 *p;
 584
 585         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 586         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 587         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 588         WRITE32(hdr->taglen);
 589         WRITEMEM(hdr->tag, hdr->taglen);
 590         WRITE32(NFS4_MINOR_VERSION);
 591         WRITE32(hdr->nops);
 592         return 0;
 593 }
 594
 595 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 596 {
 597         __be32 *p;
 598
 599         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 600         BUG_ON(p == NULL);
 601         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 602 }
 603
 604 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 605 {
 606         char owner_name[IDMAP_NAMESZ];
 607         char owner_group[IDMAP_NAMESZ];
 608         int owner_namelen = 0;
 609         int owner_grouplen = 0;
 610         __be32 *p;
 611         __be32 *q;
 612         int len;
 613         uint32_t bmval0 = 0;
 614         uint32_t bmval1 = 0;
 615         int status;
 616
 617         /*
 618          * We reserve enough space to write the entire attribute buffer at once.
 619          * In the worst-case, this would be
 620          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 621          *          = 36 bytes, plus any contribution from variable-length fields
 622          *            such as owner/group.
 623          */
 624         len = 16;
 625
 626         /* Sigh */
 627         if (iap->ia_valid & ATTR_SIZE)
 628                 len += 8;
 629         if (iap->ia_valid & ATTR_MODE)
 630                 len += 4;
 631         if (iap->ia_valid & ATTR_UID) {
 632                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 633                 if (owner_namelen < 0) {
 634                         dprintk("nfs: couldn't resolve uid %d to string\n",
 635                                         iap->ia_uid);
 636                         /* XXX */
 637                         strcpy(owner_name, "nobody");
 638                         owner_namelen = sizeof("nobody") - 1;
 639                         /* goto out; */
 640                 }
 641                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 642         }
 643         if (iap->ia_valid & ATTR_GID) {
 644                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 645                 if (owner_grouplen < 0) {
 646                         dprintk("nfs: couldn't resolve gid %d to string\n",
 647                                         iap->ia_gid);
 648                         strcpy(owner_group, "nobody");
 649                         owner_grouplen = sizeof("nobody") - 1;
 650                         /* goto out; */
 651                 }
 652                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 653         }
 654         if (iap->ia_valid & ATTR_ATIME_SET)
 655                 len += 16;
 656         else if (iap->ia_valid & ATTR_ATIME)
 657                 len += 4;
 658         if (iap->ia_valid & ATTR_MTIME_SET)
 659                 len += 16;
 660         else if (iap->ia_valid & ATTR_MTIME)
 661                 len += 4;
 662         RESERVE_SPACE(len);
 663
 664         /*
 665          * We write the bitmap length now, but leave the bitmap and the attribute
 666          * buffer length to be backfilled at the end of this routine.
 667          */
 668         WRITE32(2);
 669         q = p;
 670         p += 3;
 671
 672         if (iap->ia_valid & ATTR_SIZE) {
 673                 bmval0 |= FATTR4_WORD0_SIZE;
 674                 WRITE64(iap->ia_size);
 675         }
 676         if (iap->ia_valid & ATTR_MODE) {
 677                 bmval1 |= FATTR4_WORD1_MODE;
 678                 WRITE32(iap->ia_mode & S_IALLUGO);
 679         }
 680         if (iap->ia_valid & ATTR_UID) {
 681                 bmval1 |= FATTR4_WORD1_OWNER;
 682                 WRITE32(owner_namelen);
 683                 WRITEMEM(owner_name, owner_namelen);
 684         }
 685         if (iap->ia_valid & ATTR_GID) {
 686                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 687                 WRITE32(owner_grouplen);
 688                 WRITEMEM(owner_group, owner_grouplen);
 689         }
 690         if (iap->ia_valid & ATTR_ATIME_SET) {
 691                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 692                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 693                 WRITE32(0);
 694                 WRITE32(iap->ia_mtime.tv_sec);
 695                 WRITE32(iap->ia_mtime.tv_nsec);
 696         }
 697         else if (iap->ia_valid & ATTR_ATIME) {
 698                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 699                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 700         }
 701         if (iap->ia_valid & ATTR_MTIME_SET) {
 702                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 703                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 704                 WRITE32(0);
 705                 WRITE32(iap->ia_mtime.tv_sec);
 706                 WRITE32(iap->ia_mtime.tv_nsec);
 707         }
 708         else if (iap->ia_valid & ATTR_MTIME) {
 709                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 710                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 711         }
 712
 713         /*
 714          * Now we backfill the bitmap and the attribute buffer length.
 715          */
 716         if (len != ((char *)p - (char *)q) + 4) {
 717                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 718                                 len, ((char *)p - (char *)q) + 4);
 719                 BUG();
 720         }
 721         len = (char *)p - (char *)q - 12;
 722         *q++ = htonl(bmval0);
 723         *q++ = htonl(bmval1);
 724         *q++ = htonl(len);
 725
 726         status = 0;
 727 /* out: */
 728         return status;
 729 }
 730
 731 static int encode_access(struct xdr_stream *xdr, u32 access)
 732 {
 733         __be32 *p;
 734
 735         RESERVE_SPACE(8);
 736         WRITE32(OP_ACCESS);
 737         WRITE32(access);
 738
 739         return 0;
 740 }
 741
 742 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 743 {
 744         __be32 *p;
 745
 746         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 747         WRITE32(OP_CLOSE);
 748         WRITE32(arg->seqid->sequence->counter);
 749         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 750
 751         return 0;
 752 }
 753
 754 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 755 {
 756         __be32 *p;
 757
 758         RESERVE_SPACE(16);
 759         WRITE32(OP_COMMIT);
 760         WRITE64(args->offset);
 761         WRITE32(args->count);
 762
 763         return 0;
 764 }
 765
 766 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 767 {
 768         __be32 *p;
 769
 770         RESERVE_SPACE(8);
 771         WRITE32(OP_CREATE);
 772         WRITE32(create->ftype);
 773
 774         switch (create->ftype) {
 775         case NF4LNK:
 776                 RESERVE_SPACE(4);
 777                 WRITE32(create->u.symlink.len);
 778                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 779                 break;
 780
 781         case NF4BLK: case NF4CHR:
 782                 RESERVE_SPACE(8);
 783                 WRITE32(create->u.device.specdata1);
 784                 WRITE32(create->u.device.specdata2);
 785                 break;
 786
 787         default:
 788                 break;
 789         }
 790
 791         RESERVE_SPACE(4 + create->name->len);
 792         WRITE32(create->name->len);
 793         WRITEMEM(create->name->name, create->name->len);
 794
 795         return encode_attrs(xdr, create->attrs, create->server);
 796 }
 797
 798 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 799 {
 800         __be32 *p;
 801
 802         RESERVE_SPACE(12);
 803         WRITE32(OP_GETATTR);
 804         WRITE32(1);
 805         WRITE32(bitmap);
 806         return 0;
 807 }
 808
 809 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 810 {
 811         __be32 *p;
 812
 813         RESERVE_SPACE(16);
 814         WRITE32(OP_GETATTR);
 815         WRITE32(2);
 816         WRITE32(bm0);
 817         WRITE32(bm1);
 818         return 0;
 819 }
 820
 821 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 822 {
 823         return encode_getattr_two(xdr,
 824                         bitmask[0] & nfs4_fattr_bitmap[0],
 825                         bitmask[1] & nfs4_fattr_bitmap[1]);
 826 }
 827
 828 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 829 {
 830         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 831                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 832 }
 833
 834 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 835 {
 836         return encode_getattr_two(xdr,
 837                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 838                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 839 }
 840
 841 static int encode_getfh(struct xdr_stream *xdr)
 842 {
 843         __be32 *p;
 844
 845         RESERVE_SPACE(4);
 846         WRITE32(OP_GETFH);
 847
 848         return 0;
 849 }
 850
 851 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 852 {
 853         __be32 *p;
 854
 855         RESERVE_SPACE(8 + name->len);
 856         WRITE32(OP_LINK);
 857         WRITE32(name->len);
 858         WRITEMEM(name->name, name->len);
 859
 860         return 0;
 861 }
 862
 863 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 864 {
 865         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 866                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 867         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 868 }
 869
 870 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 871 {
 872         if (fl->fl_end == OFFSET_MAX)
 873                 return ~(uint64_t)0;
 874         return fl->fl_end - fl->fl_start + 1;
 875 }
 876
 877 /*
 878  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 879  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 880  */
 881 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 882 {
 883         __be32 *p;
 884
 885         RESERVE_SPACE(32);
 886         WRITE32(OP_LOCK);
 887         WRITE32(nfs4_lock_type(args->fl, args->block));
 888         WRITE32(args->reclaim);
 889         WRITE64(args->fl->fl_start);
 890         WRITE64(nfs4_lock_length(args->fl));
 891         WRITE32(args->new_lock_owner);
 892         if (args->new_lock_owner){
 893                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 894                 WRITE32(args->open_seqid->sequence->counter);
 895                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 896                 WRITE32(args->lock_seqid->sequence->counter);
 897                 WRITE64(args->lock_owner.clientid);
 898                 WRITE32(16);
 899                 WRITEMEM("lock id:", 8);
 900                 WRITE64(args->lock_owner.id);
 901         }
 902         else {
 903                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 904                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 905                 WRITE32(args->lock_seqid->sequence->counter);
 906         }
 907
 908         return 0;
 909 }
 910
 911 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 912 {
 913         __be32 *p;
 914
 915         RESERVE_SPACE(52);
 916         WRITE32(OP_LOCKT);
 917         WRITE32(nfs4_lock_type(args->fl, 0));
 918         WRITE64(args->fl->fl_start);
 919         WRITE64(nfs4_lock_length(args->fl));
 920         WRITE64(args->lock_owner.clientid);
 921         WRITE32(16);
 922         WRITEMEM("lock id:", 8);
 923         WRITE64(args->lock_owner.id);
 924
 925         return 0;
 926 }
 927
 928 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 929 {
 930         __be32 *p;
 931
 932         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 933         WRITE32(OP_LOCKU);
 934         WRITE32(nfs4_lock_type(args->fl, 0));
 935         WRITE32(args->seqid->sequence->counter);
 936         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 937         WRITE64(args->fl->fl_start);
 938         WRITE64(nfs4_lock_length(args->fl));
 939
 940         return 0;
 941 }
 942
 943 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 944 {
 945         int len = name->len;
 946         __be32 *p;
 947
 948         RESERVE_SPACE(8 + len);
 949         WRITE32(OP_LOOKUP);
 950         WRITE32(len);
 951         WRITEMEM(name->name, len);
 952
 953         return 0;
 954 }
 955
 956 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 957 {
 958         __be32 *p;
 959
 960         RESERVE_SPACE(8);
 961         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 962                 case FMODE_READ:
 963                         WRITE32(NFS4_SHARE_ACCESS_READ);
 964                         break;
 965                 case FMODE_WRITE:
 966                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 967                         break;
 968                 case FMODE_READ|FMODE_WRITE:
 969                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 970                         break;
 971                 default:
 972                         BUG();
 973         }
 974         WRITE32(0);             /* for linux, share_deny = 0 always */
 975 }
 976
 977 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 978 {
 979         __be32 *p;
 980  /*
 981  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 982  * owner 4 = 32
 983  */
 984         RESERVE_SPACE(8);
 985         WRITE32(OP_OPEN);
 986         WRITE32(arg->seqid->sequence->counter);
 987         encode_share_access(xdr, arg->open_flags);
 988         RESERVE_SPACE(28);
 989         WRITE64(arg->clientid);
 990         WRITE32(16);
 991         WRITEMEM("open id:", 8);
 992         WRITE64(arg->id);
 993 }
 994
 995 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 996 {
 997         __be32 *p;
 998
 999         RESERVE_SPACE(4);
1000         switch(arg->open_flags & O_EXCL) {
1001                 case 0:
1002                         WRITE32(NFS4_CREATE_UNCHECKED);
1003                         encode_attrs(xdr, arg->u.attrs, arg->server);
1004                         break;
1005                 default:
1006                         WRITE32(NFS4_CREATE_EXCLUSIVE);
1007                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1008         }
1009 }
1010
1011 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1012 {
1013         __be32 *p;
1014
1015         RESERVE_SPACE(4);
1016         switch (arg->open_flags & O_CREAT) {
1017                 case 0:
1018                         WRITE32(NFS4_OPEN_NOCREATE);
1019                         break;
1020                 default:
1021                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1022                         WRITE32(NFS4_OPEN_CREATE);
1023                         encode_createmode(xdr, arg);
1024         }
1025 }
1026
1027 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
1028 {
1029         __be32 *p;
1030
1031         RESERVE_SPACE(4);
1032         switch (delegation_type) {
1033                 case 0:
1034                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
1035                         break;
1036                 case FMODE_READ:
1037                         WRITE32(NFS4_OPEN_DELEGATE_READ);
1038                         break;
1039                 case FMODE_WRITE|FMODE_READ:
1040                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1041                         break;
1042                 default:
1043                         BUG();
1044         }
1045 }
1046
1047 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1048 {
1049         __be32 *p;
1050
1051         RESERVE_SPACE(4);
1052         WRITE32(NFS4_OPEN_CLAIM_NULL);
1053         encode_string(xdr, name->len, name->name);
1054 }
1055
1056 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
1057 {
1058         __be32 *p;
1059
1060         RESERVE_SPACE(4);
1061         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1062         encode_delegation_type(xdr, type);
1063 }
1064
1065 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1066 {
1067         __be32 *p;
1068
1069         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1070         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1071         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1072         encode_string(xdr, name->len, name->name);
1073 }
1074
1075 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1076 {
1077         encode_openhdr(xdr, arg);
1078         encode_opentype(xdr, arg);
1079         switch (arg->claim) {
1080                 case NFS4_OPEN_CLAIM_NULL:
1081                         encode_claim_null(xdr, arg->name);
1082                         break;
1083                 case NFS4_OPEN_CLAIM_PREVIOUS:
1084                         encode_claim_previous(xdr, arg->u.delegation_type);
1085                         break;
1086                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1087                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1088                         break;
1089                 default:
1090                         BUG();
1091         }
1092         return 0;
1093 }
1094
1095 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1096 {
1097         __be32 *p;
1098
1099         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1100         WRITE32(OP_OPEN_CONFIRM);
1101         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1102         WRITE32(arg->seqid->sequence->counter);
1103
1104         return 0;
1105 }
1106
1107 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1108 {
1109         __be32 *p;
1110
1111         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1112         WRITE32(OP_OPEN_DOWNGRADE);
1113         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1114         WRITE32(arg->seqid->sequence->counter);
1115         encode_share_access(xdr, arg->open_flags);
1116         return 0;
1117 }
1118
1119 static int
1120 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1121 {
1122         int len = fh->size;
1123         __be32 *p;
1124
1125         RESERVE_SPACE(8 + len);
1126         WRITE32(OP_PUTFH);
1127         WRITE32(len);
1128         WRITEMEM(fh->data, len);
1129
1130         return 0;
1131 }
1132
1133 static int encode_putrootfh(struct xdr_stream *xdr)
1134 {
1135         __be32 *p;
1136
1137         RESERVE_SPACE(4);
1138         WRITE32(OP_PUTROOTFH);
1139
1140         return 0;
1141 }
1142
1143 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1144 {
1145         nfs4_stateid stateid;
1146         __be32 *p;
1147
1148         RESERVE_SPACE(NFS4_STATEID_SIZE);
1149         if (ctx->state != NULL) {
1150                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1151                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1152         } else
1153                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1154 }
1155
1156 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1157 {
1158         __be32 *p;
1159
1160         RESERVE_SPACE(4);
1161         WRITE32(OP_READ);
1162
1163         encode_stateid(xdr, args->context);
1164
1165         RESERVE_SPACE(12);
1166         WRITE64(args->offset);
1167         WRITE32(args->count);
1168
1169         return 0;
1170 }
1171
1172 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1173 {
1174         uint32_t attrs[2] = {
1175                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1176                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1177         };
1178         __be32 *p;
1179
1180         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1181         WRITE32(OP_READDIR);
1182         WRITE64(readdir->cookie);
1183         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1184         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1185         WRITE32(readdir->count);
1186         WRITE32(2);
1187         /* Switch to mounted_on_fileid if the server supports it */
1188         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1189                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1190         else
1191                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1192         WRITE32(attrs[0] & readdir->bitmask[0]);
1193         WRITE32(attrs[1] & readdir->bitmask[1]);
1194         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1195                         __func__,
1196                         (unsigned long long)readdir->cookie,
1197                         ((u32 *)readdir->verifier.data)[0],
1198                         ((u32 *)readdir->verifier.data)[1],
1199                         attrs[0] & readdir->bitmask[0],
1200                         attrs[1] & readdir->bitmask[1]);
1201
1202         return 0;
1203 }
1204
1205 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1206 {
1207         __be32 *p;
1208
1209         RESERVE_SPACE(4);
1210         WRITE32(OP_READLINK);
1211
1212         return 0;
1213 }
1214
1215 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1216 {
1217         __be32 *p;
1218
1219         RESERVE_SPACE(8 + name->len);
1220         WRITE32(OP_REMOVE);
1221         WRITE32(name->len);
1222         WRITEMEM(name->name, name->len);
1223
1224         return 0;
1225 }
1226
1227 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1228 {
1229         __be32 *p;
1230
1231         RESERVE_SPACE(8 + oldname->len);
1232         WRITE32(OP_RENAME);
1233         WRITE32(oldname->len);
1234         WRITEMEM(oldname->name, oldname->len);
1235
1236         RESERVE_SPACE(4 + newname->len);
1237         WRITE32(newname->len);
1238         WRITEMEM(newname->name, newname->len);
1239
1240         return 0;
1241 }
1242
1243 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1244 {
1245         __be32 *p;
1246
1247         RESERVE_SPACE(12);
1248         WRITE32(OP_RENEW);
1249         WRITE64(client_stateid->cl_clientid);
1250
1251         return 0;
1252 }
1253
1254 static int
1255 encode_restorefh(struct xdr_stream *xdr)
1256 {
1257         __be32 *p;
1258
1259         RESERVE_SPACE(4);
1260         WRITE32(OP_RESTOREFH);
1261
1262         return 0;
1263 }
1264
1265 static int
1266 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1271         WRITE32(OP_SETATTR);
1272         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1273         RESERVE_SPACE(2*4);
1274         WRITE32(1);
1275         WRITE32(FATTR4_WORD0_ACL);
1276         if (arg->acl_len % 4)
1277                 return -EINVAL;
1278         RESERVE_SPACE(4);
1279         WRITE32(arg->acl_len);
1280         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1281         return 0;
1282 }
1283
1284 static int
1285 encode_savefh(struct xdr_stream *xdr)
1286 {
1287         __be32 *p;
1288
1289         RESERVE_SPACE(4);
1290         WRITE32(OP_SAVEFH);
1291
1292         return 0;
1293 }
1294
1295 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1296 {
1297         int status;
1298         __be32 *p;
1299
1300         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1301         WRITE32(OP_SETATTR);
1302         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1303
1304         if ((status = encode_attrs(xdr, arg->iap, server)))
1305                 return status;
1306
1307         return 0;
1308 }
1309
1310 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1311 {
1312         __be32 *p;
1313
1314         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1315         WRITE32(OP_SETCLIENTID);
1316         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1317
1318         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1319         RESERVE_SPACE(4);
1320         WRITE32(setclientid->sc_prog);
1321         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1322         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1323         RESERVE_SPACE(4);
1324         WRITE32(setclientid->sc_cb_ident);
1325
1326         return 0;
1327 }
1328
1329 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1330 {
1331         __be32 *p;
1332
1333         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1334         WRITE32(OP_SETCLIENTID_CONFIRM);
1335         WRITE64(client_state->cl_clientid);
1336         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1337
1338         return 0;
1339 }
1340
1341 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1342 {
1343         __be32 *p;
1344
1345         RESERVE_SPACE(4);
1346         WRITE32(OP_WRITE);
1347
1348         encode_stateid(xdr, args->context);
1349
1350         RESERVE_SPACE(16);
1351         WRITE64(args->offset);
1352         WRITE32(args->stable);
1353         WRITE32(args->count);
1354
1355         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1356
1357         return 0;
1358 }
1359
1360 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1361 {
1362         __be32 *p;
1363
1364         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1365
1366         WRITE32(OP_DELEGRETURN);
1367         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1368         return 0;
1369
1370 }
1371 /*
1372  * END OF "GENERIC" ENCODE ROUTINES.
1373  */
1374
1375 /*
1376  * Encode an ACCESS request
1377  */
1378 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1379 {
1380         struct xdr_stream xdr;
1381         struct compound_hdr hdr = {
1382                 .nops = 3,
1383         };
1384         int status;
1385
1386         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1387         encode_compound_hdr(&xdr, &hdr);
1388         status = encode_putfh(&xdr, args->fh);
1389         if (status != 0)
1390                 goto out;
1391         status = encode_access(&xdr, args->access);
1392         if (status != 0)
1393                 goto out;
1394         status = encode_getfattr(&xdr, args->bitmask);
1395 out:
1396         return status;
1397 }
1398
1399 /*
1400  * Encode LOOKUP request
1401  */
1402 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1403 {
1404         struct xdr_stream xdr;
1405         struct compound_hdr hdr = {
1406                 .nops = 4,
1407         };
1408         int status;
1409
1410         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1411         encode_compound_hdr(&xdr, &hdr);
1412         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1413                 goto out;
1414         if ((status = encode_lookup(&xdr, args->name)) != 0)
1415                 goto out;
1416         if ((status = encode_getfh(&xdr)) != 0)
1417                 goto out;
1418         status = encode_getfattr(&xdr, args->bitmask);
1419 out:
1420         return status;
1421 }
1422
1423 /*
1424  * Encode LOOKUP_ROOT request
1425  */
1426 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1427 {
1428         struct xdr_stream xdr;
1429         struct compound_hdr hdr = {
1430                 .nops = 3,
1431         };
1432         int status;
1433
1434         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435         encode_compound_hdr(&xdr, &hdr);
1436         if ((status = encode_putrootfh(&xdr)) != 0)
1437                 goto out;
1438         if ((status = encode_getfh(&xdr)) == 0)
1439                 status = encode_getfattr(&xdr, args->bitmask);
1440 out:
1441         return status;
1442 }
1443
1444 /*
1445  * Encode REMOVE request
1446  */
1447 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1448 {
1449         struct xdr_stream xdr;
1450         struct compound_hdr hdr = {
1451                 .nops = 3,
1452         };
1453         int status;
1454
1455         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1456         encode_compound_hdr(&xdr, &hdr);
1457         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1458                 goto out;
1459         if ((status = encode_remove(&xdr, &args->name)) != 0)
1460                 goto out;
1461         status = encode_getfattr(&xdr, args->bitmask);
1462 out:
1463         return status;
1464 }
1465
1466 /*
1467  * Encode RENAME request
1468  */
1469 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1470 {
1471         struct xdr_stream xdr;
1472         struct compound_hdr hdr = {
1473                 .nops = 7,
1474         };
1475         int status;
1476
1477         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1478         encode_compound_hdr(&xdr, &hdr);
1479         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1480                 goto out;
1481         if ((status = encode_savefh(&xdr)) != 0)
1482                 goto out;
1483         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1484                 goto out;
1485         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1486                 goto out;
1487         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1488                 goto out;
1489         if ((status = encode_restorefh(&xdr)) != 0)
1490                 goto out;
1491         status = encode_getfattr(&xdr, args->bitmask);
1492 out:
1493         return status;
1494 }
1495
1496 /*
1497  * Encode LINK request
1498  */
1499 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1500 {
1501         struct xdr_stream xdr;
1502         struct compound_hdr hdr = {
1503                 .nops = 7,
1504         };
1505         int status;
1506
1507         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1508         encode_compound_hdr(&xdr, &hdr);
1509         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1510                 goto out;
1511         if ((status = encode_savefh(&xdr)) != 0)
1512                 goto out;
1513         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1514                 goto out;
1515         if ((status = encode_link(&xdr, args->name)) != 0)
1516                 goto out;
1517         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1518                 goto out;
1519         if ((status = encode_restorefh(&xdr)) != 0)
1520                 goto out;
1521         status = encode_getfattr(&xdr, args->bitmask);
1522 out:
1523         return status;
1524 }
1525
1526 /*
1527  * Encode CREATE request
1528  */
1529 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1530 {
1531         struct xdr_stream xdr;
1532         struct compound_hdr hdr = {
1533                 .nops = 7,
1534         };
1535         int status;
1536
1537         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1538         encode_compound_hdr(&xdr, &hdr);
1539         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1540                 goto out;
1541         if ((status = encode_savefh(&xdr)) != 0)
1542                 goto out;
1543         if ((status = encode_create(&xdr, args)) != 0)
1544                 goto out;
1545         if ((status = encode_getfh(&xdr)) != 0)
1546                 goto out;
1547         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1548                 goto out;
1549         if ((status = encode_restorefh(&xdr)) != 0)
1550                 goto out;
1551         status = encode_getfattr(&xdr, args->bitmask);
1552 out:
1553         return status;
1554 }
1555
1556 /*
1557  * Encode SYMLINK request
1558  */
1559 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1560 {
1561         return nfs4_xdr_enc_create(req, p, args);
1562 }
1563
1564 /*
1565  * Encode GETATTR request
1566  */
1567 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1568 {
1569         struct xdr_stream xdr;
1570         struct compound_hdr hdr = {
1571                 .nops = 2,
1572         };
1573         int status;
1574
1575         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1576         encode_compound_hdr(&xdr, &hdr);
1577         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1578                 status = encode_getfattr(&xdr, args->bitmask);
1579         return status;
1580 }
1581
1582 /*
1583  * Encode a CLOSE request
1584  */
1585 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1586 {
1587         struct xdr_stream xdr;
1588         struct compound_hdr hdr = {
1589                 .nops   = 3,
1590         };
1591         int status;
1592
1593         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1594         encode_compound_hdr(&xdr, &hdr);
1595         status = encode_putfh(&xdr, args->fh);
1596         if(status)
1597                 goto out;
1598         status = encode_close(&xdr, args);
1599         if (status != 0)
1600                 goto out;
1601         status = encode_getfattr(&xdr, args->bitmask);
1602 out:
1603         return status;
1604 }
1605
1606 /*
1607  * Encode an OPEN request
1608  */
1609 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1610 {
1611         struct xdr_stream xdr;
1612         struct compound_hdr hdr = {
1613                 .nops = 7,
1614         };
1615         int status;
1616
1617         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1618         encode_compound_hdr(&xdr, &hdr);
1619         status = encode_putfh(&xdr, args->fh);
1620         if (status)
1621                 goto out;
1622         status = encode_savefh(&xdr);
1623         if (status)
1624                 goto out;
1625         status = encode_open(&xdr, args);
1626         if (status)
1627                 goto out;
1628         status = encode_getfh(&xdr);
1629         if (status)
1630                 goto out;
1631         status = encode_getfattr(&xdr, args->bitmask);
1632         if (status)
1633                 goto out;
1634         status = encode_restorefh(&xdr);
1635         if (status)
1636                 goto out;
1637         status = encode_getfattr(&xdr, args->bitmask);
1638 out:
1639         return status;
1640 }
1641
1642 /*
1643  * Encode an OPEN_CONFIRM request
1644  */
1645 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1646 {
1647         struct xdr_stream xdr;
1648         struct compound_hdr hdr = {
1649                 .nops   = 2,
1650         };
1651         int status;
1652
1653         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1654         encode_compound_hdr(&xdr, &hdr);
1655         status = encode_putfh(&xdr, args->fh);
1656         if(status)
1657                 goto out;
1658         status = encode_open_confirm(&xdr, args);
1659 out:
1660         return status;
1661 }
1662
1663 /*
1664  * Encode an OPEN request with no attributes.
1665  */
1666 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1667 {
1668         struct xdr_stream xdr;
1669         struct compound_hdr hdr = {
1670                 .nops   = 3,
1671         };
1672         int status;
1673
1674         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1675         encode_compound_hdr(&xdr, &hdr);
1676         status = encode_putfh(&xdr, args->fh);
1677         if (status)
1678                 goto out;
1679         status = encode_open(&xdr, args);
1680         if (status)
1681                 goto out;
1682         status = encode_getfattr(&xdr, args->bitmask);
1683 out:
1684         return status;
1685 }
1686
1687 /*
1688  * Encode an OPEN_DOWNGRADE request
1689  */
1690 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1691 {
1692         struct xdr_stream xdr;
1693         struct compound_hdr hdr = {
1694                 .nops   = 3,
1695         };
1696         int status;
1697
1698         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1699         encode_compound_hdr(&xdr, &hdr);
1700         status = encode_putfh(&xdr, args->fh);
1701         if (status)
1702                 goto out;
1703         status = encode_open_downgrade(&xdr, args);
1704         if (status != 0)
1705                 goto out;
1706         status = encode_getfattr(&xdr, args->bitmask);
1707 out:
1708         return status;
1709 }
1710
1711 /*
1712  * Encode a LOCK request
1713  */
1714 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1715 {
1716         struct xdr_stream xdr;
1717         struct compound_hdr hdr = {
1718                 .nops   = 2,
1719         };
1720         int status;
1721
1722         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1723         encode_compound_hdr(&xdr, &hdr);
1724         status = encode_putfh(&xdr, args->fh);
1725         if(status)
1726                 goto out;
1727         status = encode_lock(&xdr, args);
1728 out:
1729         return status;
1730 }
1731
1732 /*
1733  * Encode a LOCKT request
1734  */
1735 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1736 {
1737         struct xdr_stream xdr;
1738         struct compound_hdr hdr = {
1739                 .nops   = 2,
1740         };
1741         int status;
1742
1743         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744         encode_compound_hdr(&xdr, &hdr);
1745         status = encode_putfh(&xdr, args->fh);
1746         if(status)
1747                 goto out;
1748         status = encode_lockt(&xdr, args);
1749 out:
1750         return status;
1751 }
1752
1753 /*
1754  * Encode a LOCKU request
1755  */
1756 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1757 {
1758         struct xdr_stream xdr;
1759         struct compound_hdr hdr = {
1760                 .nops   = 2,
1761         };
1762         int status;
1763
1764         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1765         encode_compound_hdr(&xdr, &hdr);
1766         status = encode_putfh(&xdr, args->fh);
1767         if(status)
1768                 goto out;
1769         status = encode_locku(&xdr, args);
1770 out:
1771         return status;
1772 }
1773
1774 /*
1775  * Encode a READLINK request
1776  */
1777 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1778 {
1779         struct xdr_stream xdr;
1780         struct compound_hdr hdr = {
1781                 .nops = 2,
1782         };
1783         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1784         unsigned int replen;
1785         int status;
1786
1787         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1788         encode_compound_hdr(&xdr, &hdr);
1789         status = encode_putfh(&xdr, args->fh);
1790         if(status)
1791                 goto out;
1792         status = encode_readlink(&xdr, args, req);
1793
1794         /* set up reply kvec
1795          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1796          *      + OP_READLINK + status + string length = 8
1797          */
1798         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1799         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1800                         args->pgbase, args->pglen);
1801
1802 out:
1803         return status;
1804 }
1805
1806 /*
1807  * Encode a READDIR request
1808  */
1809 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1810 {
1811         struct xdr_stream xdr;
1812         struct compound_hdr hdr = {
1813                 .nops = 2,
1814         };
1815         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1816         int replen;
1817         int status;
1818
1819         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1820         encode_compound_hdr(&xdr, &hdr);
1821         status = encode_putfh(&xdr, args->fh);
1822         if(status)
1823                 goto out;
1824         status = encode_readdir(&xdr, args, req);
1825
1826         /* set up reply kvec
1827          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1828          *      + OP_READDIR + status + verifer(2)  = 9
1829          */
1830         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1831         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1832                          args->pgbase, args->count);
1833         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1834                         __FUNCTION__, replen, args->pages,
1835                         args->pgbase, args->count);
1836
1837 out:
1838         return status;
1839 }
1840
1841 /*
1842  * Encode a READ request
1843  */
1844 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1845 {
1846         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1847         struct xdr_stream xdr;
1848         struct compound_hdr hdr = {
1849                 .nops = 2,
1850         };
1851         int replen, status;
1852
1853         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1854         encode_compound_hdr(&xdr, &hdr);
1855         status = encode_putfh(&xdr, args->fh);
1856         if (status)
1857                 goto out;
1858         status = encode_read(&xdr, args);
1859         if (status)
1860                 goto out;
1861
1862         /* set up reply kvec
1863          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1864          *       + OP_READ + status + eof + datalen = 9
1865          */
1866         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1867         xdr_inline_pages(&req->rq_rcv_buf, replen,
1868                          args->pages, args->pgbase, args->count);
1869         req->rq_rcv_buf.flags |= XDRBUF_READ;
1870 out:
1871         return status;
1872 }
1873
1874 /*
1875  * Encode an SETATTR request
1876  */
1877 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1878
1879 {
1880         struct xdr_stream xdr;
1881         struct compound_hdr hdr = {
1882                 .nops   = 3,
1883         };
1884         int status;
1885
1886         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1887         encode_compound_hdr(&xdr, &hdr);
1888         status = encode_putfh(&xdr, args->fh);
1889         if(status)
1890                 goto out;
1891         status = encode_setattr(&xdr, args, args->server);
1892         if(status)
1893                 goto out;
1894         status = encode_getfattr(&xdr, args->bitmask);
1895 out:
1896         return status;
1897 }
1898
1899 /*
1900  * Encode a GETACL request
1901  */
1902 static int
1903 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1904                 struct nfs_getaclargs *args)
1905 {
1906         struct xdr_stream xdr;
1907         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1908         struct compound_hdr hdr = {
1909                 .nops   = 2,
1910         };
1911         int replen, status;
1912
1913         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914         encode_compound_hdr(&xdr, &hdr);
1915         status = encode_putfh(&xdr, args->fh);
1916         if (status)
1917                 goto out;
1918         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1919         /* set up reply buffer: */
1920         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1921         xdr_inline_pages(&req->rq_rcv_buf, replen,
1922                 args->acl_pages, args->acl_pgbase, args->acl_len);
1923 out:
1924         return status;
1925 }
1926
1927 /*
1928  * Encode a WRITE request
1929  */
1930 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1931 {
1932         struct xdr_stream xdr;
1933         struct compound_hdr hdr = {
1934                 .nops = 3,
1935         };
1936         int status;
1937
1938         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1939         encode_compound_hdr(&xdr, &hdr);
1940         status = encode_putfh(&xdr, args->fh);
1941         if (status)
1942                 goto out;
1943         status = encode_write(&xdr, args);
1944         if (status)
1945                 goto out;
1946         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1947         status = encode_getfattr(&xdr, args->bitmask);
1948 out:
1949         return status;
1950 }
1951
1952 /*
1953  *  a COMMIT request
1954  */
1955 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1956 {
1957         struct xdr_stream xdr;
1958         struct compound_hdr hdr = {
1959                 .nops = 3,
1960         };
1961         int status;
1962
1963         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964         encode_compound_hdr(&xdr, &hdr);
1965         status = encode_putfh(&xdr, args->fh);
1966         if (status)
1967                 goto out;
1968         status = encode_commit(&xdr, args);
1969         if (status)
1970                 goto out;
1971         status = encode_getfattr(&xdr, args->bitmask);
1972 out:
1973         return status;
1974 }
1975
1976 /*
1977  * FSINFO request
1978  */
1979 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1980 {
1981         struct xdr_stream xdr;
1982         struct compound_hdr hdr = {
1983                 .nops   = 2,
1984         };
1985         int status;
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, &hdr);
1989         status = encode_putfh(&xdr, args->fh);
1990         if (!status)
1991                 status = encode_fsinfo(&xdr, args->bitmask);
1992         return status;
1993 }
1994
1995 /*
1996  * a PATHCONF request
1997  */
1998 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1999 {
2000         struct xdr_stream xdr;
2001         struct compound_hdr hdr = {
2002                 .nops = 2,
2003         };
2004         int status;
2005
2006         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007         encode_compound_hdr(&xdr, &hdr);
2008         status = encode_putfh(&xdr, args->fh);
2009         if (!status)
2010                 status = encode_getattr_one(&xdr,
2011                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2012         return status;
2013 }
2014
2015 /*
2016  * a STATFS request
2017  */
2018 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .nops = 2,
2023         };
2024         int status;
2025
2026         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2027         encode_compound_hdr(&xdr, &hdr);
2028         status = encode_putfh(&xdr, args->fh);
2029         if (status == 0)
2030                 status = encode_getattr_two(&xdr,
2031                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2032                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2033         return status;
2034 }
2035
2036 /*
2037  * GETATTR_BITMAP request
2038  */
2039 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2040 {
2041         struct xdr_stream xdr;
2042         struct compound_hdr hdr = {
2043                 .nops = 2,
2044         };
2045         int status;
2046
2047         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2048         encode_compound_hdr(&xdr, &hdr);
2049         status = encode_putfh(&xdr, fhandle);
2050         if (status == 0)
2051                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2052                                 FATTR4_WORD0_LINK_SUPPORT|
2053                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2054                                 FATTR4_WORD0_ACLSUPPORT);
2055         return status;
2056 }
2057
2058 /*
2059  * a RENEW request
2060  */
2061 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2062 {
2063         struct xdr_stream xdr;
2064         struct compound_hdr hdr = {
2065                 .nops   = 1,
2066         };
2067
2068         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2069         encode_compound_hdr(&xdr, &hdr);
2070         return encode_renew(&xdr, clp);
2071 }
2072
2073 /*
2074  * a SETCLIENTID request
2075  */
2076 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2077 {
2078         struct xdr_stream xdr;
2079         struct compound_hdr hdr = {
2080                 .nops   = 1,
2081         };
2082
2083         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084         encode_compound_hdr(&xdr, &hdr);
2085         return encode_setclientid(&xdr, sc);
2086 }
2087
2088 /*
2089  * a SETCLIENTID_CONFIRM request
2090  */
2091 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2092 {
2093         struct xdr_stream xdr;
2094         struct compound_hdr hdr = {
2095                 .nops   = 3,
2096         };
2097         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2098         int status;
2099
2100         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2101         encode_compound_hdr(&xdr, &hdr);
2102         status = encode_setclientid_confirm(&xdr, clp);
2103         if (!status)
2104                 status = encode_putrootfh(&xdr);
2105         if (!status)
2106                 status = encode_fsinfo(&xdr, lease_bitmap);
2107         return status;
2108 }
2109
2110 /*
2111  * DELEGRETURN request
2112  */
2113 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2114 {
2115         struct xdr_stream xdr;
2116         struct compound_hdr hdr = {
2117                 .nops = 3,
2118         };
2119         int status;
2120
2121         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2122         encode_compound_hdr(&xdr, &hdr);
2123         status = encode_putfh(&xdr, args->fhandle);
2124         if (status != 0)
2125                 goto out;
2126         status = encode_delegreturn(&xdr, args->stateid);
2127         if (status != 0)
2128                 goto out;
2129         status = encode_getfattr(&xdr, args->bitmask);
2130 out:
2131         return status;
2132 }
2133
2134 /*
2135  * Encode FS_LOCATIONS request
2136  */
2137 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2138 {
2139         struct xdr_stream xdr;
2140         struct compound_hdr hdr = {
2141                 .nops = 3,
2142         };
2143         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2144         int replen;
2145         int status;
2146
2147         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2148         encode_compound_hdr(&xdr, &hdr);
2149         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2150                 goto out;
2151         if ((status = encode_lookup(&xdr, args->name)) != 0)
2152                 goto out;
2153         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2154                 goto out;
2155         /* set up reply
2156          *   toplevel_status + OP_PUTFH + status
2157          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2158          */
2159         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2160         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2161                         0, PAGE_SIZE);
2162 out:
2163         return status;
2164 }
2165
2166 /*
2167  * START OF "GENERIC" DECODE ROUTINES.
2168  *   These may look a little ugly since they are imported from a "generic"
2169  * set of XDR encode/decode routines which are intended to be shared by
2170  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2171  *
2172  * If the pain of reading these is too great, it should be a straightforward
2173  * task to translate them into Linux-specific versions which are more
2174  * consistent with the style used in NFSv2/v3...
2175  */
2176 #define READ32(x)         (x) = ntohl(*p++)
2177 #define READ64(x)         do {                  \
2178         (x) = (u64)ntohl(*p++) << 32;           \
2179         (x) |= ntohl(*p++);                     \
2180 } while (0)
2181 #define READTIME(x)       do {                  \
2182         p++;                                    \
2183         (x.tv_sec) = ntohl(*p++);               \
2184         (x.tv_nsec) = ntohl(*p++);              \
2185 } while (0)
2186 #define COPYMEM(x,nbytes) do {                  \
2187         memcpy((x), p, nbytes);                 \
2188         p += XDR_QUADLEN(nbytes);               \
2189 } while (0)
2190
2191 #define READ_BUF(nbytes)  do { \
2192         p = xdr_inline_decode(xdr, nbytes); \
2193         if (unlikely(!p)) { \
2194                 dprintk("nfs: %s: prematurely hit end of receive" \
2195                                 " buffer\n", __FUNCTION__); \
2196                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2197                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2198                 return -EIO; \
2199         } \
2200 } while (0)
2201
2202 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2203 {
2204         __be32 *p;
2205
2206         READ_BUF(4);
2207         READ32(*len);
2208         READ_BUF(*len);
2209         *string = (char *)p;
2210         return 0;
2211 }
2212
2213 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2214 {
2215         __be32 *p;
2216
2217         READ_BUF(8);
2218         READ32(hdr->status);
2219         READ32(hdr->taglen);
2220
2221         READ_BUF(hdr->taglen + 4);
2222         hdr->tag = (char *)p;
2223         p += XDR_QUADLEN(hdr->taglen);
2224         READ32(hdr->nops);
2225         return 0;
2226 }
2227
2228 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2229 {
2230         __be32 *p;
2231         uint32_t opnum;
2232         int32_t nfserr;
2233
2234         READ_BUF(8);
2235         READ32(opnum);
2236         if (opnum != expected) {
2237                 dprintk("nfs: Server returned operation"
2238                         " %d but we issued a request for %d\n",
2239                                 opnum, expected);
2240                 return -EIO;
2241         }
2242         READ32(nfserr);
2243         if (nfserr != NFS_OK)
2244                 return nfs4_stat_to_errno(nfserr);
2245         return 0;
2246 }
2247
2248 /* Dummy routine */
2249 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2250 {
2251         __be32 *p;
2252         unsigned int strlen;
2253         char *str;
2254
2255         READ_BUF(12);
2256         return decode_opaque_inline(xdr, &strlen, &str);
2257 }
2258
2259 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2260 {
2261         uint32_t bmlen;
2262         __be32 *p;
2263
2264         READ_BUF(4);
2265         READ32(bmlen);
2266
2267         bitmap[0] = bitmap[1] = 0;
2268         READ_BUF((bmlen << 2));
2269         if (bmlen > 0) {
2270                 READ32(bitmap[0]);
2271                 if (bmlen > 1)
2272                         READ32(bitmap[1]);
2273         }
2274         return 0;
2275 }
2276
2277 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2278 {
2279         __be32 *p;
2280
2281         READ_BUF(4);
2282         READ32(*attrlen);
2283         *savep = xdr->p;
2284         return 0;
2285 }
2286
2287 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2288 {
2289         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2290                 decode_attr_bitmap(xdr, bitmask);
2291                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2292         } else
2293                 bitmask[0] = bitmask[1] = 0;
2294         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2295         return 0;
2296 }
2297
2298 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2299 {
2300         __be32 *p;
2301
2302         *type = 0;
2303         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2304                 return -EIO;
2305         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2306                 READ_BUF(4);
2307                 READ32(*type);
2308                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2309                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2310                         return -EIO;
2311                 }
2312                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2313         }
2314         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2315         return 0;
2316 }
2317
2318 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2319 {
2320         __be32 *p;
2321
2322         *change = 0;
2323         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2324                 return -EIO;
2325         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2326                 READ_BUF(8);
2327                 READ64(*change);
2328                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2329         }
2330         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2331                         (unsigned long long)*change);
2332         return 0;
2333 }
2334
2335 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2336 {
2337         __be32 *p;
2338
2339         *size = 0;
2340         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2341                 return -EIO;
2342         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2343                 READ_BUF(8);
2344                 READ64(*size);
2345                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2346         }
2347         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2348         return 0;
2349 }
2350
2351 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2352 {
2353         __be32 *p;
2354
2355         *res = 0;
2356         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2357                 return -EIO;
2358         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2359                 READ_BUF(4);
2360                 READ32(*res);
2361                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2362         }
2363         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2364         return 0;
2365 }
2366
2367 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2368 {
2369         __be32 *p;
2370
2371         *res = 0;
2372         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2373                 return -EIO;
2374         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2375                 READ_BUF(4);
2376                 READ32(*res);
2377                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2378         }
2379         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2380         return 0;
2381 }
2382
2383 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2384 {
2385         __be32 *p;
2386
2387         fsid->major = 0;
2388         fsid->minor = 0;
2389         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2390                 return -EIO;
2391         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2392                 READ_BUF(16);
2393                 READ64(fsid->major);
2394                 READ64(fsid->minor);
2395                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2396         }
2397         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2398                         (unsigned long long)fsid->major,
2399                         (unsigned long long)fsid->minor);
2400         return 0;
2401 }
2402
2403 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2404 {
2405         __be32 *p;
2406
2407         *res = 60;
2408         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2409                 return -EIO;
2410         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2411                 READ_BUF(4);
2412                 READ32(*res);
2413                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2414         }
2415         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2416         return 0;
2417 }
2418
2419 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2420 {
2421         __be32 *p;
2422
2423         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2424         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2425                 return -EIO;
2426         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2427                 READ_BUF(4);
2428                 READ32(*res);
2429                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2430         }
2431         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2432         return 0;
2433 }
2434
2435 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2436 {
2437         __be32 *p;
2438
2439         *fileid = 0;
2440         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2441                 return -EIO;
2442         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2443                 READ_BUF(8);
2444                 READ64(*fileid);
2445                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2446         }
2447         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2448         return 0;
2449 }
2450
2451 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2452 {
2453         __be32 *p;
2454
2455         *fileid = 0;
2456         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2457                 return -EIO;
2458         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2459                 READ_BUF(8);
2460                 READ64(*fileid);
2461                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2462         }
2463         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2464         return 0;
2465 }
2466
2467 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2468 {
2469         __be32 *p;
2470         int status = 0;
2471
2472         *res = 0;
2473         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2474                 return -EIO;
2475         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2476                 READ_BUF(8);
2477                 READ64(*res);
2478                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2479         }
2480         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2481         return status;
2482 }
2483
2484 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2485 {
2486         __be32 *p;
2487         int status = 0;
2488
2489         *res = 0;
2490         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2491                 return -EIO;
2492         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2493                 READ_BUF(8);
2494                 READ64(*res);
2495                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2496         }
2497         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2498         return status;
2499 }
2500
2501 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2502 {
2503         __be32 *p;
2504         int status = 0;
2505
2506         *res = 0;
2507         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2508                 return -EIO;
2509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2510                 READ_BUF(8);
2511                 READ64(*res);
2512                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2513         }
2514         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2515         return status;
2516 }
2517
2518 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2519 {
2520         u32 n;
2521         __be32 *p;
2522         int status = 0;
2523
2524         READ_BUF(4);
2525         READ32(n);
2526         if (n == 0)
2527                 goto root_path;
2528         dprintk("path ");
2529         path->ncomponents = 0;
2530         while (path->ncomponents < n) {
2531                 struct nfs4_string *component = &path->components[path->ncomponents];
2532                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2533                 if (unlikely(status != 0))
2534                         goto out_eio;
2535                 if (path->ncomponents != n)
2536                         dprintk("/");
2537                 dprintk("%s", component->data);
2538                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2539                         path->ncomponents++;
2540                 else {
2541                         dprintk("cannot parse %d components in path\n", n);
2542                         goto out_eio;
2543                 }
2544         }
2545 out:
2546         dprintk("\n");
2547         return status;
2548 root_path:
2549 /* a root pathname is sent as a zero component4 */
2550         path->ncomponents = 1;
2551         path->components[0].len=0;
2552         path->components[0].data=NULL;
2553         dprintk("path /\n");
2554         goto out;
2555 out_eio:
2556         dprintk(" status %d", status);
2557         status = -EIO;
2558         goto out;
2559 }
2560
2561 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2562 {
2563         int n;
2564         __be32 *p;
2565         int status = -EIO;
2566
2567         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2568                 goto out;
2569         status = 0;
2570         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2571                 goto out;
2572         dprintk("%s: fsroot ", __FUNCTION__);
2573         status = decode_pathname(xdr, &res->fs_path);
2574         if (unlikely(status != 0))
2575                 goto out;
2576         READ_BUF(4);
2577         READ32(n);
2578         if (n <= 0)
2579                 goto out_eio;
2580         res->nlocations = 0;
2581         while (res->nlocations < n) {
2582                 u32 m;
2583                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2584
2585                 READ_BUF(4);
2586                 READ32(m);
2587
2588                 loc->nservers = 0;
2589                 dprintk("%s: servers ", __FUNCTION__);
2590                 while (loc->nservers < m) {
2591                         struct nfs4_string *server = &loc->servers[loc->nservers];
2592                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2593                         if (unlikely(status != 0))
2594                                 goto out_eio;
2595                         dprintk("%s ", server->data);
2596                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2597                                 loc->nservers++;
2598                         else {
2599                                 unsigned int i;
2600                                 dprintk("%s: using first %u of %u servers "
2601                                         "returned for location %u\n",
2602                                                 __FUNCTION__,
2603                                                 NFS4_FS_LOCATION_MAXSERVERS,
2604                                                 m, res->nlocations);
2605                                 for (i = loc->nservers; i < m; i++) {
2606                                         unsigned int len;
2607                                         char *data;
2608                                         status = decode_opaque_inline(xdr, &len, &data);
2609                                         if (unlikely(status != 0))
2610                                                 goto out_eio;
2611                                 }
2612                         }
2613                 }
2614                 status = decode_pathname(xdr, &loc->rootpath);
2615                 if (unlikely(status != 0))
2616                         goto out_eio;
2617                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2618                         res->nlocations++;
2619         }
2620 out:
2621         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2622         return status;
2623 out_eio:
2624         status = -EIO;
2625         goto out;
2626 }
2627
2628 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2629 {
2630         __be32 *p;
2631         int status = 0;
2632
2633         *res = 0;
2634         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2635                 return -EIO;
2636         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2637                 READ_BUF(8);
2638                 READ64(*res);
2639                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2640         }
2641         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2642         return status;
2643 }
2644
2645 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2646 {
2647         __be32 *p;
2648         int status = 0;
2649
2650         *maxlink = 1;
2651         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2652                 return -EIO;
2653         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2654                 READ_BUF(4);
2655                 READ32(*maxlink);
2656                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2657         }
2658         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2659         return status;
2660 }
2661
2662 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2663 {
2664         __be32 *p;
2665         int status = 0;
2666
2667         *maxname = 1024;
2668         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2669                 return -EIO;
2670         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2671                 READ_BUF(4);
2672                 READ32(*maxname);
2673                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2674         }
2675         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2676         return status;
2677 }
2678
2679 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2680 {
2681         __be32 *p;
2682         int status = 0;
2683
2684         *res = 1024;
2685         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2686                 return -EIO;
2687         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2688                 uint64_t maxread;
2689                 READ_BUF(8);
2690                 READ64(maxread);
2691                 if (maxread > 0x7FFFFFFF)
2692                         maxread = 0x7FFFFFFF;
2693                 *res = (uint32_t)maxread;
2694                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2695         }
2696         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2697         return status;
2698 }
2699
2700 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2701 {
2702         __be32 *p;
2703         int status = 0;
2704
2705         *res = 1024;
2706         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2707                 return -EIO;
2708         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2709                 uint64_t maxwrite;
2710                 READ_BUF(8);
2711                 READ64(maxwrite);
2712                 if (maxwrite > 0x7FFFFFFF)
2713                         maxwrite = 0x7FFFFFFF;
2714                 *res = (uint32_t)maxwrite;
2715                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2716         }
2717         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2718         return status;
2719 }
2720
2721 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2722 {
2723         __be32 *p;
2724
2725         *mode = 0;
2726         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2727                 return -EIO;
2728         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2729                 READ_BUF(4);
2730                 READ32(*mode);
2731                 *mode &= ~S_IFMT;
2732                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2733         }
2734         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2735         return 0;
2736 }
2737
2738 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2739 {
2740         __be32 *p;
2741
2742         *nlink = 1;
2743         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2744                 return -EIO;
2745         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2746                 READ_BUF(4);
2747                 READ32(*nlink);
2748                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2749         }
2750         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2751         return 0;
2752 }
2753
2754 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2755 {
2756         uint32_t len;
2757         __be32 *p;
2758
2759         *uid = -2;
2760         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2761                 return -EIO;
2762         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2763                 READ_BUF(4);
2764                 READ32(len);
2765                 READ_BUF(len);
2766                 if (len < XDR_MAX_NETOBJ) {
2767                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2768                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2769                                                 __FUNCTION__);
2770                 } else
2771                         dprintk("%s: name too long (%u)!\n",
2772                                         __FUNCTION__, len);
2773                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2774         }
2775         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2776         return 0;
2777 }
2778
2779 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2780 {
2781         uint32_t len;
2782         __be32 *p;
2783
2784         *gid = -2;
2785         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2786                 return -EIO;
2787         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2788                 READ_BUF(4);
2789                 READ32(len);
2790                 READ_BUF(len);
2791                 if (len < XDR_MAX_NETOBJ) {
2792                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2793                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2794                                                 __FUNCTION__);
2795                 } else
2796                         dprintk("%s: name too long (%u)!\n",
2797                                         __FUNCTION__, len);
2798                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2799         }
2800         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2801         return 0;
2802 }
2803
2804 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2805 {
2806         uint32_t major = 0, minor = 0;
2807         __be32 *p;
2808
2809         *rdev = MKDEV(0,0);
2810         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2811                 return -EIO;
2812         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2813                 dev_t tmp;
2814
2815                 READ_BUF(8);
2816                 READ32(major);
2817                 READ32(minor);
2818                 tmp = MKDEV(major, minor);
2819                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2820                         *rdev = tmp;
2821                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2822         }
2823         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2824         return 0;
2825 }
2826
2827 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2828 {
2829         __be32 *p;
2830         int status = 0;
2831
2832         *res = 0;
2833         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2834                 return -EIO;
2835         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2836                 READ_BUF(8);
2837                 READ64(*res);
2838                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2839         }
2840         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2841         return status;
2842 }
2843
2844 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2845 {
2846         __be32 *p;
2847         int status = 0;
2848
2849         *res = 0;
2850         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2851                 return -EIO;
2852         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2853                 READ_BUF(8);
2854                 READ64(*res);
2855                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2856         }
2857         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2858         return status;
2859 }
2860
2861 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2862 {
2863         __be32 *p;
2864         int status = 0;
2865
2866         *res = 0;
2867         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2868                 return -EIO;
2869         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2870                 READ_BUF(8);
2871                 READ64(*res);
2872                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2873         }
2874         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2875         return status;
2876 }
2877
2878 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2879 {
2880         __be32 *p;
2881
2882         *used = 0;
2883         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2884                 return -EIO;
2885         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2886                 READ_BUF(8);
2887                 READ64(*used);
2888                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2889         }
2890         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2891                         (unsigned long long)*used);
2892         return 0;
2893 }
2894
2895 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2896 {
2897         __be32 *p;
2898         uint64_t sec;
2899         uint32_t nsec;
2900
2901         READ_BUF(12);
2902         READ64(sec);
2903         READ32(nsec);
2904         time->tv_sec = (time_t)sec;
2905         time->tv_nsec = (long)nsec;
2906         return 0;
2907 }
2908
2909 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2910 {
2911         int status = 0;
2912
2913         time->tv_sec = 0;
2914         time->tv_nsec = 0;
2915         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2916                 return -EIO;
2917         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2918                 status = decode_attr_time(xdr, time);
2919                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2920         }
2921         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2922         return status;
2923 }
2924
2925 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2926 {
2927         int status = 0;
2928
2929         time->tv_sec = 0;
2930         time->tv_nsec = 0;
2931         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2932                 return -EIO;
2933         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2934                 status = decode_attr_time(xdr, time);
2935                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2936         }
2937         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2938         return status;
2939 }
2940
2941 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2942 {
2943         int status = 0;
2944
2945         time->tv_sec = 0;
2946         time->tv_nsec = 0;
2947         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2948                 return -EIO;
2949         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2950                 status = decode_attr_time(xdr, time);
2951                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2952         }
2953         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2954         return status;
2955 }
2956
2957 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2958 {
2959         unsigned int attrwords = XDR_QUADLEN(attrlen);
2960         unsigned int nwords = xdr->p - savep;
2961
2962         if (unlikely(attrwords != nwords)) {
2963                 dprintk("%s: server returned incorrect attribute length: "
2964                         "%u %c %u\n",
2965                                 __FUNCTION__,
2966                                 attrwords << 2,
2967                                 (attrwords < nwords) ? '<' : '>',
2968                                 nwords << 2);
2969                 return -EIO;
2970         }
2971         return 0;
2972 }
2973
2974 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2975 {
2976         __be32 *p;
2977
2978         READ_BUF(20);
2979         READ32(cinfo->atomic);
2980         READ64(cinfo->before);
2981         READ64(cinfo->after);
2982         return 0;
2983 }
2984
2985 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2986 {
2987         __be32 *p;
2988         uint32_t supp, acc;
2989         int status;
2990
2991         status = decode_op_hdr(xdr, OP_ACCESS);
2992         if (status)
2993                 return status;
2994         READ_BUF(8);
2995         READ32(supp);
2996         READ32(acc);
2997         access->supported = supp;
2998         access->access = acc;
2999         return 0;
3000 }
3001
3002 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3003 {
3004         __be32 *p;
3005         int status;
3006
3007         status = decode_op_hdr(xdr, OP_CLOSE);
3008         if (status != -EIO)
3009                 nfs_increment_open_seqid(status, res->seqid);
3010         if (status)
3011                 return status;
3012         READ_BUF(NFS4_STATEID_SIZE);
3013         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3014         return 0;
3015 }
3016
3017 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3018 {
3019         __be32 *p;
3020         int status;
3021
3022         status = decode_op_hdr(xdr, OP_COMMIT);
3023         if (status)
3024                 return status;
3025         READ_BUF(8);
3026         COPYMEM(res->verf->verifier, 8);
3027         return 0;
3028 }
3029
3030 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3031 {
3032         __be32 *p;
3033         uint32_t bmlen;
3034         int status;
3035
3036         status = decode_op_hdr(xdr, OP_CREATE);
3037         if (status)
3038                 return status;
3039         if ((status = decode_change_info(xdr, cinfo)))
3040                 return status;
3041         READ_BUF(4);
3042         READ32(bmlen);
3043         READ_BUF(bmlen << 2);
3044         return 0;
3045 }
3046
3047 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3048 {
3049         __be32 *savep;
3050         uint32_t attrlen,
3051                  bitmap[2] = {0};
3052         int status;
3053
3054         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3055                 goto xdr_error;
3056         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3057                 goto xdr_error;
3058         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3059                 goto xdr_error;
3060         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3061                 goto xdr_error;
3062         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3063                 goto xdr_error;
3064         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3065                 goto xdr_error;
3066         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3067                 goto xdr_error;
3068         status = verify_attr_len(xdr, savep, attrlen);
3069 xdr_error:
3070         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3071         return status;
3072 }
3073
3074 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3075 {
3076         __be32 *savep;
3077         uint32_t attrlen,
3078                  bitmap[2] = {0};
3079         int status;
3080
3081         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3082                 goto xdr_error;
3083         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3084                 goto xdr_error;
3085         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3086                 goto xdr_error;
3087
3088         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3089                 goto xdr_error;
3090         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3091                 goto xdr_error;
3092         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3093                 goto xdr_error;
3094         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3095                 goto xdr_error;
3096         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3097                 goto xdr_error;
3098         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3099                 goto xdr_error;
3100
3101         status = verify_attr_len(xdr, savep, attrlen);
3102 xdr_error:
3103         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3104         return status;
3105 }
3106
3107 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3108 {
3109         __be32 *savep;
3110         uint32_t attrlen,
3111                  bitmap[2] = {0};
3112         int status;
3113
3114         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3115                 goto xdr_error;
3116         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3117                 goto xdr_error;
3118         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3119                 goto xdr_error;
3120
3121         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3122                 goto xdr_error;
3123         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3124                 goto xdr_error;
3125
3126         status = verify_attr_len(xdr, savep, attrlen);
3127 xdr_error:
3128         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3129         return status;
3130 }
3131
3132 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3133 {
3134         __be32 *savep;
3135         uint32_t attrlen,
3136                  bitmap[2] = {0},
3137                  type;
3138         int status, fmode = 0;
3139         uint64_t fileid;
3140
3141         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3142                 goto xdr_error;
3143         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3144                 goto xdr_error;
3145
3146         fattr->bitmap[0] = bitmap[0];
3147         fattr->bitmap[1] = bitmap[1];
3148
3149         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3150                 goto xdr_error;
3151
3152
3153         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3154                 goto xdr_error;
3155         fattr->type = nfs_type2fmt[type].nfs2type;
3156         fmode = nfs_type2fmt[type].mode;
3157
3158         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3159                 goto xdr_error;
3160         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3161                 goto xdr_error;
3162         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3163                 goto xdr_error;
3164         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3165                 goto xdr_error;
3166         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3167                                                 struct nfs4_fs_locations,
3168                                                 fattr))) != 0)
3169                 goto xdr_error;
3170         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3171                 goto xdr_error;
3172         fattr->mode |= fmode;
3173         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3174                 goto xdr_error;
3175         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3176                 goto xdr_error;
3177         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3178                 goto xdr_error;
3179         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3180                 goto xdr_error;
3181         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3182                 goto xdr_error;
3183         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3184                 goto xdr_error;
3185         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3186                 goto xdr_error;
3187         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3188                 goto xdr_error;
3189         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3190                 goto xdr_error;
3191         if (fattr->fileid == 0 && fileid != 0)
3192                 fattr->fileid = fileid;
3193         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3194                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3195 xdr_error:
3196         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3197         return status;
3198 }
3199
3200
3201 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3202 {
3203         __be32 *savep;
3204         uint32_t attrlen, bitmap[2];
3205         int status;
3206
3207         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3208                 goto xdr_error;
3209         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3210                 goto xdr_error;
3211         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3212                 goto xdr_error;
3213
3214         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3215
3216         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3217                 goto xdr_error;
3218         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3219                 goto xdr_error;
3220         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3221                 goto xdr_error;
3222         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3223         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3224                 goto xdr_error;
3225         fsinfo->wtpref = fsinfo->wtmax;
3226
3227         status = verify_attr_len(xdr, savep, attrlen);
3228 xdr_error:
3229         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3230         return status;
3231 }
3232
3233 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3234 {
3235         __be32 *p;
3236         uint32_t len;
3237         int status;
3238
3239         /* Zero handle first to allow comparisons */
3240         memset(fh, 0, sizeof(*fh));
3241
3242         status = decode_op_hdr(xdr, OP_GETFH);
3243         if (status)
3244                 return status;
3245
3246         READ_BUF(4);
3247         READ32(len);
3248         if (len > NFS4_FHSIZE)
3249                 return -EIO;
3250         fh->size = len;
3251         READ_BUF(len);
3252         COPYMEM(fh->data, len);
3253         return 0;
3254 }
3255
3256 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3257 {
3258         int status;
3259
3260         status = decode_op_hdr(xdr, OP_LINK);
3261         if (status)
3262                 return status;
3263         return decode_change_info(xdr, cinfo);
3264 }
3265
3266 /*
3267  * We create the owner, so we know a proper owner.id length is 4.
3268  */
3269 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3270 {
3271         uint64_t offset, length, clientid;
3272         __be32 *p;
3273         uint32_t namelen, type;
3274
3275         READ_BUF(32);
3276         READ64(offset);
3277         READ64(length);
3278         READ32(type);
3279         if (fl != NULL) {
3280                 fl->fl_start = (loff_t)offset;
3281                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3282                 if (length == ~(uint64_t)0)
3283                         fl->fl_end = OFFSET_MAX;
3284                 fl->fl_type = F_WRLCK;
3285                 if (type & 1)
3286                         fl->fl_type = F_RDLCK;
3287                 fl->fl_pid = 0;
3288         }
3289         READ64(clientid);
3290         READ32(namelen);
3291         READ_BUF(namelen);
3292         return -NFS4ERR_DENIED;
3293 }
3294
3295 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3296 {
3297         __be32 *p;
3298         int status;
3299
3300         status = decode_op_hdr(xdr, OP_LOCK);
3301         if (status == -EIO)
3302                 goto out;
3303         if (status == 0) {
3304                 READ_BUF(NFS4_STATEID_SIZE);
3305                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3306         } else if (status == -NFS4ERR_DENIED)
3307                 status = decode_lock_denied(xdr, NULL);
3308         if (res->open_seqid != NULL)
3309                 nfs_increment_open_seqid(status, res->open_seqid);
3310         nfs_increment_lock_seqid(status, res->lock_seqid);
3311 out:
3312         return status;
3313 }
3314
3315 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3316 {
3317         int status;
3318         status = decode_op_hdr(xdr, OP_LOCKT);
3319         if (status == -NFS4ERR_DENIED)
3320                 return decode_lock_denied(xdr, res->denied);
3321         return status;
3322 }
3323
3324 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3325 {
3326         __be32 *p;
3327         int status;
3328
3329         status = decode_op_hdr(xdr, OP_LOCKU);
3330         if (status != -EIO)
3331                 nfs_increment_lock_seqid(status, res->seqid);
3332         if (status == 0) {
3333                 READ_BUF(NFS4_STATEID_SIZE);
3334                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3335         }
3336         return status;
3337 }
3338
3339 static int decode_lookup(struct xdr_stream *xdr)
3340 {
3341         return decode_op_hdr(xdr, OP_LOOKUP);
3342 }
3343
3344 /* This is too sick! */
3345 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3346 {
3347         __be32 *p;
3348         uint32_t limit_type, nblocks, blocksize;
3349
3350         READ_BUF(12);
3351         READ32(limit_type);
3352         switch (limit_type) {
3353                 case 1:
3354                         READ64(*maxsize);
3355                         break;
3356                 case 2:
3357                         READ32(nblocks);
3358                         READ32(blocksize);
3359                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3360         }
3361         return 0;
3362 }
3363
3364 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3365 {
3366         __be32 *p;
3367         uint32_t delegation_type;
3368
3369         READ_BUF(4);
3370         READ32(delegation_type);
3371         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3372                 res->delegation_type = 0;
3373                 return 0;
3374         }
3375         READ_BUF(NFS4_STATEID_SIZE+4);
3376         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3377         READ32(res->do_recall);
3378         switch (delegation_type) {
3379                 case NFS4_OPEN_DELEGATE_READ:
3380                         res->delegation_type = FMODE_READ;
3381                         break;
3382                 case NFS4_OPEN_DELEGATE_WRITE:
3383                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3384                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3385                                 return -EIO;
3386         }
3387         return decode_ace(xdr, NULL, res->server->nfs_client);
3388 }
3389
3390 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3391 {
3392         __be32 *p;
3393         uint32_t savewords, bmlen, i;
3394         int status;
3395
3396         status = decode_op_hdr(xdr, OP_OPEN);
3397         if (status != -EIO)
3398                 nfs_increment_open_seqid(status, res->seqid);
3399         if (status)
3400                 return status;
3401         READ_BUF(NFS4_STATEID_SIZE);
3402         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3403
3404         decode_change_info(xdr, &res->cinfo);
3405
3406         READ_BUF(8);
3407         READ32(res->rflags);
3408         READ32(bmlen);
3409         if (bmlen > 10)
3410                 goto xdr_error;
3411
3412         READ_BUF(bmlen << 2);
3413         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3414         for (i = 0; i < savewords; ++i)
3415                 READ32(res->attrset[i]);
3416         for (; i < NFS4_BITMAP_SIZE; i++)
3417                 res->attrset[i] = 0;
3418
3419         return decode_delegation(xdr, res);
3420 xdr_error:
3421         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3422         return -EIO;
3423 }
3424
3425 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3426 {
3427         __be32 *p;
3428         int status;
3429
3430         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3431         if (status != -EIO)
3432                 nfs_increment_open_seqid(status, res->seqid);
3433         if (status)
3434                 return status;
3435         READ_BUF(NFS4_STATEID_SIZE);
3436         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3437         return 0;
3438 }
3439
3440 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3441 {
3442         __be32 *p;
3443         int status;
3444
3445         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3446         if (status != -EIO)
3447                 nfs_increment_open_seqid(status, res->seqid);
3448         if (status)
3449                 return status;
3450         READ_BUF(NFS4_STATEID_SIZE);
3451         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3452         return 0;
3453 }
3454
3455 static int decode_putfh(struct xdr_stream *xdr)
3456 {
3457         return decode_op_hdr(xdr, OP_PUTFH);
3458 }
3459
3460 static int decode_putrootfh(struct xdr_stream *xdr)
3461 {
3462         return decode_op_hdr(xdr, OP_PUTROOTFH);
3463 }
3464
3465 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3466 {
3467         struct kvec *iov = req->rq_rcv_buf.head;
3468         __be32 *p;
3469         uint32_t count, eof, recvd, hdrlen;
3470         int status;
3471
3472         status = decode_op_hdr(xdr, OP_READ);
3473         if (status)
3474                 return status;
3475         READ_BUF(8);
3476         READ32(eof);
3477         READ32(count);
3478         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3479         recvd = req->rq_rcv_buf.len - hdrlen;
3480         if (count > recvd) {
3481                 dprintk("NFS: server cheating in read reply: "
3482                                 "count %u > recvd %u\n", count, recvd);
3483                 count = recvd;
3484                 eof = 0;
3485         }
3486         xdr_read_pages(xdr, count);
3487         res->eof = eof;
3488         res->count = count;
3489         return 0;
3490 }
3491
3492 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3493 {
3494         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3495         struct page     *page = *rcvbuf->pages;
3496         struct kvec     *iov = rcvbuf->head;
3497         size_t          hdrlen;
3498         u32             recvd, pglen = rcvbuf->page_len;
3499         __be32          *end, *entry, *p, *kaddr;
3500         unsigned int    nr = 0;
3501         int             status;
3502
3503         status = decode_op_hdr(xdr, OP_READDIR);
3504         if (status)
3505                 return status;
3506         READ_BUF(8);
3507         COPYMEM(readdir->verifier.data, 8);
3508         dprintk("%s: verifier = %08x:%08x\n",
3509                         __func__,
3510                         ((u32 *)readdir->verifier.data)[0],
3511                         ((u32 *)readdir->verifier.data)[1]);
3512
3513
3514         hdrlen = (char *) p - (char *) iov->iov_base;
3515         recvd = rcvbuf->len - hdrlen;
3516         if (pglen > recvd)
3517                 pglen = recvd;
3518         xdr_read_pages(xdr, pglen);
3519
3520         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3521         kaddr = p = kmap_atomic(page, KM_USER0);
3522         end = p + ((pglen + readdir->pgbase) >> 2);
3523         entry = p;
3524
3525         /* Make sure the packet actually has a value_follows and EOF entry */
3526         if ((entry + 1) > end)
3527                 goto short_pkt;
3528
3529         for (; *p++; nr++) {
3530                 u32 len, attrlen, xlen;
3531                 if (end - p < 3)
3532                         goto short_pkt;
3533                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3534                 p += 2;                 /* cookie */
3535                 len = ntohl(*p++);      /* filename length */
3536                 if (len > NFS4_MAXNAMLEN) {
3537                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3538                                         len);
3539                         goto err_unmap;
3540                 }
3541                 xlen = XDR_QUADLEN(len);
3542                 if (end - p < xlen + 1)
3543                         goto short_pkt;
3544                 dprintk("filename = %*s\n", len, (char *)p);
3545                 p += xlen;
3546                 len = ntohl(*p++);      /* bitmap length */
3547                 if (end - p < len + 1)
3548                         goto short_pkt;
3549                 p += len;
3550                 attrlen = XDR_QUADLEN(ntohl(*p++));
3551                 if (end - p < attrlen + 2)
3552                         goto short_pkt;
3553                 p += attrlen;           /* attributes */
3554                 entry = p;
3555         }
3556         /*
3557          * Apparently some server sends responses that are a valid size, but
3558          * contain no entries, and have value_follows==0 and EOF==0. For
3559          * those, just set the EOF marker.
3560          */
3561         if (!nr && entry[1] == 0) {
3562                 dprintk("NFS: readdir reply truncated!\n");
3563                 entry[1] = 1;
3564         }
3565 out:
3566         kunmap_atomic(kaddr, KM_USER0);
3567         return 0;
3568 short_pkt:
3569         /*
3570          * When we get a short packet there are 2 possibilities. We can
3571          * return an error, or fix up the response to look like a valid
3572          * response and return what we have so far. If there are no
3573          * entries and the packet was short, then return -EIO. If there
3574          * are valid entries in the response, return them and pretend that
3575          * the call was successful, but incomplete. The caller can retry the
3576          * readdir starting at the last cookie.
3577          */
3578         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3579         entry[0] = entry[1] = 0;
3580         if (nr)
3581                 goto out;
3582 err_unmap:
3583         kunmap_atomic(kaddr, KM_USER0);
3584         return -errno_NFSERR_IO;
3585 }
3586
3587 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3588 {
3589         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3590         struct kvec *iov = rcvbuf->head;
3591         size_t hdrlen;
3592         u32 len, recvd;
3593         __be32 *p;
3594         char *kaddr;
3595         int status;
3596
3597         status = decode_op_hdr(xdr, OP_READLINK);
3598         if (status)
3599                 return status;
3600
3601         /* Convert length of symlink */
3602         READ_BUF(4);
3603         READ32(len);
3604         if (len >= rcvbuf->page_len || len <= 0) {
3605                 dprintk("nfs: server returned giant symlink!\n");
3606                 return -ENAMETOOLONG;
3607         }
3608         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3609         recvd = req->rq_rcv_buf.len - hdrlen;
3610         if (recvd < len) {
3611                 dprintk("NFS: server cheating in readlink reply: "
3612                                 "count %u > recvd %u\n", len, recvd);
3613                 return -EIO;
3614         }
3615         xdr_read_pages(xdr, len);
3616         /*
3617          * The XDR encode routine has set things up so that
3618          * the link text will be copied directly into the
3619          * buffer.  We just have to do overflow-checking,
3620          * and and null-terminate the text (the VFS expects
3621          * null-termination).
3622          */
3623         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3624         kaddr[len+rcvbuf->page_base] = '\0';
3625         kunmap_atomic(kaddr, KM_USER0);
3626         return 0;
3627 }
3628
3629 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3630 {
3631         int status;
3632
3633         status = decode_op_hdr(xdr, OP_REMOVE);
3634         if (status)
3635                 goto out;
3636         status = decode_change_info(xdr, cinfo);
3637 out:
3638         return status;
3639 }
3640
3641 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3642               struct nfs4_change_info *new_cinfo)
3643 {
3644         int status;
3645
3646         status = decode_op_hdr(xdr, OP_RENAME);
3647         if (status)
3648                 goto out;
3649         if ((status = decode_change_info(xdr, old_cinfo)))
3650                 goto out;
3651         status = decode_change_info(xdr, new_cinfo);
3652 out:
3653         return status;
3654 }
3655
3656 static int decode_renew(struct xdr_stream *xdr)
3657 {
3658         return decode_op_hdr(xdr, OP_RENEW);
3659 }
3660
3661 static int
3662 decode_restorefh(struct xdr_stream *xdr)
3663 {
3664         return decode_op_hdr(xdr, OP_RESTOREFH);
3665 }
3666
3667 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3668                 size_t *acl_len)
3669 {
3670         __be32 *savep;
3671         uint32_t attrlen,
3672                  bitmap[2] = {0};
3673         struct kvec *iov = req->rq_rcv_buf.head;
3674         int status;
3675
3676         *acl_len = 0;
3677         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3678                 goto out;
3679         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3680                 goto out;
3681         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3682                 goto out;
3683
3684         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3685                 return -EIO;
3686         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3687                 size_t hdrlen;
3688                 u32 recvd;
3689
3690                 /* We ignore &savep and don't do consistency checks on
3691                  * the attr length.  Let userspace figure it out.... */
3692                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3693                 recvd = req->rq_rcv_buf.len - hdrlen;
3694                 if (attrlen > recvd) {
3695                         dprintk("NFS: server cheating in getattr"
3696                                         " acl reply: attrlen %u > recvd %u\n",
3697                                         attrlen, recvd);
3698                         return -EINVAL;
3699                 }
3700                 xdr_read_pages(xdr, attrlen);
3701                 *acl_len = attrlen;
3702         } else
3703                 status = -EOPNOTSUPP;
3704
3705 out:
3706         return status;
3707 }
3708
3709 static int
3710 decode_savefh(struct xdr_stream *xdr)
3711 {
3712         return decode_op_hdr(xdr, OP_SAVEFH);
3713 }
3714
3715 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3716 {
3717         __be32 *p;
3718         uint32_t bmlen;
3719         int status;
3720
3721
3722         status = decode_op_hdr(xdr, OP_SETATTR);
3723         if (status)
3724                 return status;
3725         READ_BUF(4);
3726         READ32(bmlen);
3727         READ_BUF(bmlen << 2);
3728         return 0;
3729 }
3730
3731 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3732 {
3733         __be32 *p;
3734         uint32_t opnum;
3735         int32_t nfserr;
3736
3737         READ_BUF(8);
3738         READ32(opnum);
3739         if (opnum != OP_SETCLIENTID) {
3740                 dprintk("nfs: decode_setclientid: Server returned operation"
3741                                 " %d\n", opnum);
3742                 return -EIO;
3743         }
3744         READ32(nfserr);
3745         if (nfserr == NFS_OK) {
3746                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3747                 READ64(clp->cl_clientid);
3748                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3749         } else if (nfserr == NFSERR_CLID_INUSE) {
3750                 uint32_t len;
3751
3752                 /* skip netid string */
3753                 READ_BUF(4);
3754                 READ32(len);
3755                 READ_BUF(len);
3756
3757                 /* skip uaddr string */
3758                 READ_BUF(4);
3759                 READ32(len);
3760                 READ_BUF(len);
3761                 return -NFSERR_CLID_INUSE;
3762         } else
3763                 return nfs4_stat_to_errno(nfserr);
3764
3765         return 0;
3766 }
3767
3768 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3769 {
3770         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3771 }
3772
3773 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3774 {
3775         __be32 *p;
3776         int status;
3777
3778         status = decode_op_hdr(xdr, OP_WRITE);
3779         if (status)
3780                 return status;
3781
3782         READ_BUF(16);
3783         READ32(res->count);
3784         READ32(res->verf->committed);
3785         COPYMEM(res->verf->verifier, 8);
3786         return 0;
3787 }
3788
3789 static int decode_delegreturn(struct xdr_stream *xdr)
3790 {
3791         return decode_op_hdr(xdr, OP_DELEGRETURN);
3792 }
3793
3794 /*
3795  * Decode OPEN_DOWNGRADE response
3796  */
3797 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3798 {
3799         struct xdr_stream xdr;
3800         struct compound_hdr hdr;
3801         int status;
3802
3803         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3804         status = decode_compound_hdr(&xdr, &hdr);
3805         if (status)
3806                 goto out;
3807         status = decode_putfh(&xdr);
3808         if (status)
3809                 goto out;
3810         status = decode_open_downgrade(&xdr, res);
3811         if (status != 0)
3812                 goto out;
3813         decode_getfattr(&xdr, res->fattr, res->server);
3814 out:
3815         return status;
3816 }
3817
3818 /*
3819  * END OF "GENERIC" DECODE ROUTINES.
3820  */
3821
3822 /*
3823  * Decode ACCESS response
3824  */
3825 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3826 {
3827         struct xdr_stream xdr;
3828         struct compound_hdr hdr;
3829         int status;
3830
3831         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3832         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3833                 goto out;
3834         status = decode_putfh(&xdr);
3835         if (status != 0)
3836                 goto out;
3837         status = decode_access(&xdr, res);
3838         if (status != 0)
3839                 goto out;
3840         decode_getfattr(&xdr, res->fattr, res->server);
3841 out:
3842         return status;
3843 }
3844
3845 /*
3846  * Decode LOOKUP response
3847  */
3848 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3849 {
3850         struct xdr_stream xdr;
3851         struct compound_hdr hdr;
3852         int status;
3853
3854         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3855         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3856                 goto out;
3857         if ((status = decode_putfh(&xdr)) != 0)
3858                 goto out;
3859         if ((status = decode_lookup(&xdr)) != 0)
3860                 goto out;
3861         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3862                 goto out;
3863         status = decode_getfattr(&xdr, res->fattr, res->server);
3864 out:
3865         return status;
3866 }
3867
3868 /*
3869  * Decode LOOKUP_ROOT response
3870  */
3871 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3872 {
3873         struct xdr_stream xdr;
3874         struct compound_hdr hdr;
3875         int status;
3876
3877         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3878         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3879                 goto out;
3880         if ((status = decode_putrootfh(&xdr)) != 0)
3881                 goto out;
3882         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3883                 status = decode_getfattr(&xdr, res->fattr, res->server);
3884 out:
3885         return status;
3886 }
3887
3888 /*
3889  * Decode REMOVE response
3890  */
3891 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3892 {
3893         struct xdr_stream xdr;
3894         struct compound_hdr hdr;
3895         int status;
3896
3897         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3898         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3899                 goto out;
3900         if ((status = decode_putfh(&xdr)) != 0)
3901                 goto out;
3902         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3903                 goto out;
3904         decode_getfattr(&xdr, &res->dir_attr, res->server);
3905 out:
3906         return status;
3907 }
3908
3909 /*
3910  * Decode RENAME response
3911  */
3912 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3913 {
3914         struct xdr_stream xdr;
3915         struct compound_hdr hdr;
3916         int status;
3917
3918         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3919         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3920                 goto out;
3921         if ((status = decode_putfh(&xdr)) != 0)
3922                 goto out;
3923         if ((status = decode_savefh(&xdr)) != 0)
3924                 goto out;
3925         if ((status = decode_putfh(&xdr)) != 0)
3926                 goto out;
3927         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3928                 goto out;
3929         /* Current FH is target directory */
3930         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3931                 goto out;
3932         if ((status = decode_restorefh(&xdr)) != 0)
3933                 goto out;
3934         decode_getfattr(&xdr, res->old_fattr, res->server);
3935 out:
3936         return status;
3937 }
3938
3939 /*
3940  * Decode LINK response
3941  */
3942 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3943 {
3944         struct xdr_stream xdr;
3945         struct compound_hdr hdr;
3946         int status;
3947
3948         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3949         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3950                 goto out;
3951         if ((status = decode_putfh(&xdr)) != 0)
3952                 goto out;
3953         if ((status = decode_savefh(&xdr)) != 0)
3954                 goto out;
3955         if ((status = decode_putfh(&xdr)) != 0)
3956                 goto out;
3957         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3958                 goto out;
3959         /*
3960          * Note order: OP_LINK leaves the directory as the current
3961          *             filehandle.
3962          */
3963         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3964                 goto out;
3965         if ((status = decode_restorefh(&xdr)) != 0)
3966                 goto out;
3967         decode_getfattr(&xdr, res->fattr, res->server);
3968 out:
3969         return status;
3970 }
3971
3972 /*
3973  * Decode CREATE response
3974  */
3975 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3976 {
3977         struct xdr_stream xdr;
3978         struct compound_hdr hdr;
3979         int status;
3980
3981         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3982         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3983                 goto out;
3984         if ((status = decode_putfh(&xdr)) != 0)
3985                 goto out;
3986         if ((status = decode_savefh(&xdr)) != 0)
3987                 goto out;
3988         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3989                 goto out;
3990         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3991                 goto out;
3992         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3993                 goto out;
3994         if ((status = decode_restorefh(&xdr)) != 0)
3995                 goto out;
3996         decode_getfattr(&xdr, res->dir_fattr, res->server);
3997 out:
3998         return status;
3999 }
4000
4001 /*
4002  * Decode SYMLINK response
4003  */
4004 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4005 {
4006         return nfs4_xdr_dec_create(rqstp, p, res);
4007 }
4008
4009 /*
4010  * Decode GETATTR response
4011  */
4012 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4013 {
4014         struct xdr_stream xdr;
4015         struct compound_hdr hdr;
4016         int status;
4017
4018         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4019         status = decode_compound_hdr(&xdr, &hdr);
4020         if (status)
4021                 goto out;
4022         status = decode_putfh(&xdr);
4023         if (status)
4024                 goto out;
4025         status = decode_getfattr(&xdr, res->fattr, res->server);
4026 out:
4027         return status;
4028
4029 }
4030
4031 /*
4032  * Encode an SETACL request
4033  */
4034 static int
4035 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4036 {
4037         struct xdr_stream xdr;
4038         struct compound_hdr hdr = {
4039                 .nops   = 2,
4040         };
4041         int status;
4042
4043         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4044         encode_compound_hdr(&xdr, &hdr);
4045         status = encode_putfh(&xdr, args->fh);
4046         if (status)
4047                 goto out;
4048         status = encode_setacl(&xdr, args);
4049 out:
4050         return status;
4051 }
4052 /*
4053  * Decode SETACL response
4054  */
4055 static int
4056 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4057 {
4058         struct xdr_stream xdr;
4059         struct compound_hdr hdr;
4060         int status;
4061
4062         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4063         status = decode_compound_hdr(&xdr, &hdr);
4064         if (status)
4065                 goto out;
4066         status = decode_putfh(&xdr);
4067         if (status)
4068                 goto out;
4069         status = decode_setattr(&xdr, res);
4070 out:
4071         return status;
4072 }
4073
4074 /*
4075  * Decode GETACL response
4076  */
4077 static int
4078 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4079 {
4080         struct xdr_stream xdr;
4081         struct compound_hdr hdr;
4082         int status;
4083
4084         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4085         status = decode_compound_hdr(&xdr, &hdr);
4086         if (status)
4087                 goto out;
4088         status = decode_putfh(&xdr);
4089         if (status)
4090                 goto out;
4091         status = decode_getacl(&xdr, rqstp, acl_len);
4092
4093 out:
4094         return status;
4095 }
4096
4097 /*
4098  * Decode CLOSE response
4099  */
4100 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4101 {
4102         struct xdr_stream xdr;
4103         struct compound_hdr hdr;
4104         int status;
4105
4106         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4107         status = decode_compound_hdr(&xdr, &hdr);
4108         if (status)
4109                 goto out;
4110         status = decode_putfh(&xdr);
4111         if (status)
4112                 goto out;
4113         status = decode_close(&xdr, res);
4114         if (status != 0)
4115                 goto out;
4116         /*
4117          * Note: Server may do delete on close for this file
4118          *      in which case the getattr call will fail with
4119          *      an ESTALE error. Shouldn't be a problem,
4120          *      though, since fattr->valid will remain unset.
4121          */
4122         decode_getfattr(&xdr, res->fattr, res->server);
4123 out:
4124         return status;
4125 }
4126
4127 /*
4128  * Decode OPEN response
4129  */
4130 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4131 {
4132         struct xdr_stream xdr;
4133         struct compound_hdr hdr;
4134         int status;
4135
4136         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4137         status = decode_compound_hdr(&xdr, &hdr);
4138         if (status)
4139                 goto out;
4140         status = decode_putfh(&xdr);
4141         if (status)
4142                 goto out;
4143         status = decode_savefh(&xdr);
4144         if (status)
4145                 goto out;
4146         status = decode_open(&xdr, res);
4147         if (status)
4148                 goto out;
4149         if (decode_getfh(&xdr, &res->fh) != 0)
4150                 goto out;
4151         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4152                 goto out;
4153         if (decode_restorefh(&xdr) != 0)
4154                 goto out;
4155         decode_getfattr(&xdr, res->dir_attr, res->server);
4156 out:
4157         return status;
4158 }
4159
4160 /*
4161  * Decode OPEN_CONFIRM response
4162  */
4163 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4164 {
4165         struct xdr_stream xdr;
4166         struct compound_hdr hdr;
4167         int status;
4168
4169         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4170         status = decode_compound_hdr(&xdr, &hdr);
4171         if (status)
4172                 goto out;
4173         status = decode_putfh(&xdr);
4174         if (status)
4175                 goto out;
4176         status = decode_open_confirm(&xdr, res);
4177 out:
4178         return status;
4179 }
4180
4181 /*
4182  * Decode OPEN response
4183  */
4184 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4185 {
4186         struct xdr_stream xdr;
4187         struct compound_hdr hdr;
4188         int status;
4189
4190         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4191         status = decode_compound_hdr(&xdr, &hdr);
4192         if (status)
4193                 goto out;
4194         status = decode_putfh(&xdr);
4195         if (status)
4196                 goto out;
4197         status = decode_open(&xdr, res);
4198         if (status)
4199                 goto out;
4200         decode_getfattr(&xdr, res->f_attr, res->server);
4201 out:
4202         return status;
4203 }
4204
4205 /*
4206  * Decode SETATTR response
4207  */
4208 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4209 {
4210         struct xdr_stream xdr;
4211         struct compound_hdr hdr;
4212         int status;
4213
4214         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4215         status = decode_compound_hdr(&xdr, &hdr);
4216         if (status)
4217                 goto out;
4218         status = decode_putfh(&xdr);
4219         if (status)
4220                 goto out;
4221         status = decode_setattr(&xdr, res);
4222         if (status)
4223                 goto out;
4224         status = decode_getfattr(&xdr, res->fattr, res->server);
4225         if (status == NFS4ERR_DELAY)
4226                 status = 0;
4227 out:
4228         return status;
4229 }
4230
4231 /*
4232  * Decode LOCK response
4233  */
4234 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4235 {
4236         struct xdr_stream xdr;
4237         struct compound_hdr hdr;
4238         int status;
4239
4240         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4241         status = decode_compound_hdr(&xdr, &hdr);
4242         if (status)
4243                 goto out;
4244         status = decode_putfh(&xdr);
4245         if (status)
4246                 goto out;
4247         status = decode_lock(&xdr, res);
4248 out:
4249         return status;
4250 }
4251
4252 /*
4253  * Decode LOCKT response
4254  */
4255 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4256 {
4257         struct xdr_stream xdr;
4258         struct compound_hdr hdr;
4259         int status;
4260
4261         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4262         status = decode_compound_hdr(&xdr, &hdr);
4263         if (status)
4264                 goto out;
4265         status = decode_putfh(&xdr);
4266         if (status)
4267                 goto out;
4268         status = decode_lockt(&xdr, res);
4269 out:
4270         return status;
4271 }
4272
4273 /*
4274  * Decode LOCKU response
4275  */
4276 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4277 {
4278         struct xdr_stream xdr;
4279         struct compound_hdr hdr;
4280         int status;
4281
4282         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4283         status = decode_compound_hdr(&xdr, &hdr);
4284         if (status)
4285                 goto out;
4286         status = decode_putfh(&xdr);
4287         if (status)
4288                 goto out;
4289         status = decode_locku(&xdr, res);
4290 out:
4291         return status;
4292 }
4293
4294 /*
4295  * Decode READLINK response
4296  */
4297 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4298 {
4299         struct xdr_stream xdr;
4300         struct compound_hdr hdr;
4301         int status;
4302
4303         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4304         status = decode_compound_hdr(&xdr, &hdr);
4305         if (status)
4306                 goto out;
4307         status = decode_putfh(&xdr);
4308         if (status)
4309                 goto out;
4310         status = decode_readlink(&xdr, rqstp);
4311 out:
4312         return status;
4313 }
4314
4315 /*
4316  * Decode READDIR response
4317  */
4318 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4319 {
4320         struct xdr_stream xdr;
4321         struct compound_hdr hdr;
4322         int status;
4323
4324         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4325         status = decode_compound_hdr(&xdr, &hdr);
4326         if (status)
4327                 goto out;
4328         status = decode_putfh(&xdr);
4329         if (status)
4330                 goto out;
4331         status = decode_readdir(&xdr, rqstp, res);
4332 out:
4333         return status;
4334 }
4335
4336 /*
4337  * Decode Read response
4338  */
4339 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4340 {
4341         struct xdr_stream xdr;
4342         struct compound_hdr hdr;
4343         int status;
4344
4345         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4346         status = decode_compound_hdr(&xdr, &hdr);
4347         if (status)
4348                 goto out;
4349         status = decode_putfh(&xdr);
4350         if (status)
4351                 goto out;
4352         status = decode_read(&xdr, rqstp, res);
4353         if (!status)
4354                 status = res->count;
4355 out:
4356         return status;
4357 }
4358
4359 /*
4360  * Decode WRITE response
4361  */
4362 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4363 {
4364         struct xdr_stream xdr;
4365         struct compound_hdr hdr;
4366         int status;
4367
4368         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4369         status = decode_compound_hdr(&xdr, &hdr);
4370         if (status)
4371                 goto out;
4372         status = decode_putfh(&xdr);
4373         if (status)
4374                 goto out;
4375         status = decode_write(&xdr, res);
4376         if (status)
4377                 goto out;
4378         decode_getfattr(&xdr, res->fattr, res->server);
4379         if (!status)
4380                 status = res->count;
4381 out:
4382         return status;
4383 }
4384
4385 /*
4386  * Decode COMMIT response
4387  */
4388 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4389 {
4390         struct xdr_stream xdr;
4391         struct compound_hdr hdr;
4392         int status;
4393
4394         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4395         status = decode_compound_hdr(&xdr, &hdr);
4396         if (status)
4397                 goto out;
4398         status = decode_putfh(&xdr);
4399         if (status)
4400                 goto out;
4401         status = decode_commit(&xdr, res);
4402         if (status)
4403                 goto out;
4404         decode_getfattr(&xdr, res->fattr, res->server);
4405 out:
4406         return status;
4407 }
4408
4409 /*
4410  * FSINFO request
4411  */
4412 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4413 {
4414         struct xdr_stream xdr;
4415         struct compound_hdr hdr;
4416         int status;
4417
4418         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4419         status = decode_compound_hdr(&xdr, &hdr);
4420         if (!status)
4421                 status = decode_putfh(&xdr);
4422         if (!status)
4423                 status = decode_fsinfo(&xdr, fsinfo);
4424         if (!status)
4425                 status = nfs4_stat_to_errno(hdr.status);
4426         return status;
4427 }
4428
4429 /*
4430  * PATHCONF request
4431  */
4432 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4433 {
4434         struct xdr_stream xdr;
4435         struct compound_hdr hdr;
4436         int status;
4437
4438         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4439         status = decode_compound_hdr(&xdr, &hdr);
4440         if (!status)
4441                 status = decode_putfh(&xdr);
4442         if (!status)
4443                 status = decode_pathconf(&xdr, pathconf);
4444         return status;
4445 }
4446
4447 /*
4448  * STATFS request
4449  */
4450 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4451 {
4452         struct xdr_stream xdr;
4453         struct compound_hdr hdr;
4454         int status;
4455
4456         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4457         status = decode_compound_hdr(&xdr, &hdr);
4458         if (!status)
4459                 status = decode_putfh(&xdr);
4460         if (!status)
4461                 status = decode_statfs(&xdr, fsstat);
4462         return status;
4463 }
4464
4465 /*
4466  * GETATTR_BITMAP request
4467  */
4468 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4469 {
4470         struct xdr_stream xdr;
4471         struct compound_hdr hdr;
4472         int status;
4473
4474         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4475         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4476                 goto out;
4477         if ((status = decode_putfh(&xdr)) != 0)
4478                 goto out;
4479         status = decode_server_caps(&xdr, res);
4480 out:
4481         return status;
4482 }
4483
4484 /*
4485  * Decode RENEW response
4486  */
4487 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4488 {
4489         struct xdr_stream xdr;
4490         struct compound_hdr hdr;
4491         int status;
4492
4493         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4494         status = decode_compound_hdr(&xdr, &hdr);
4495         if (!status)
4496                 status = decode_renew(&xdr);
4497         return status;
4498 }
4499
4500 /*
4501  * a SETCLIENTID request
4502  */
4503 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4504                 struct nfs_client *clp)
4505 {
4506         struct xdr_stream xdr;
4507         struct compound_hdr hdr;
4508         int status;
4509
4510         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4511         status = decode_compound_hdr(&xdr, &hdr);
4512         if (!status)
4513                 status = decode_setclientid(&xdr, clp);
4514         if (!status)
4515                 status = nfs4_stat_to_errno(hdr.status);
4516         return status;
4517 }
4518
4519 /*
4520  * a SETCLIENTID_CONFIRM request
4521  */
4522 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4523 {
4524         struct xdr_stream xdr;
4525         struct compound_hdr hdr;
4526         int status;
4527
4528         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4529         status = decode_compound_hdr(&xdr, &hdr);
4530         if (!status)
4531                 status = decode_setclientid_confirm(&xdr);
4532         if (!status)
4533                 status = decode_putrootfh(&xdr);
4534         if (!status)
4535                 status = decode_fsinfo(&xdr, fsinfo);
4536         if (!status)
4537                 status = nfs4_stat_to_errno(hdr.status);
4538         return status;
4539 }
4540
4541 /*
4542  * DELEGRETURN request
4543  */
4544 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4545 {
4546         struct xdr_stream xdr;
4547         struct compound_hdr hdr;
4548         int status;
4549
4550         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4551         status = decode_compound_hdr(&xdr, &hdr);
4552         if (status != 0)
4553                 goto out;
4554         status = decode_putfh(&xdr);
4555         if (status != 0)
4556                 goto out;
4557         status = decode_delegreturn(&xdr);
4558         decode_getfattr(&xdr, res->fattr, res->server);
4559 out:
4560         return status;
4561 }
4562
4563 /*
4564  * FS_LOCATIONS request
4565  */
4566 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4567 {
4568         struct xdr_stream xdr;
4569         struct compound_hdr hdr;
4570         int status;
4571
4572         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4573         status = decode_compound_hdr(&xdr, &hdr);
4574         if (status != 0)
4575                 goto out;
4576         if ((status = decode_putfh(&xdr)) != 0)
4577                 goto out;
4578         if ((status = decode_lookup(&xdr)) != 0)
4579                 goto out;
4580         xdr_enter_page(&xdr, PAGE_SIZE);
4581         status = decode_getfattr(&xdr, &res->fattr, res->server);
4582 out:
4583         return status;
4584 }
4585
4586 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4587 {
4588         uint32_t bitmap[2] = {0};
4589         uint32_t len;
4590
4591         if (!*p++) {
4592                 if (!*p)
4593                         return ERR_PTR(-EAGAIN);
4594                 entry->eof = 1;
4595                 return ERR_PTR(-EBADCOOKIE);
4596         }
4597
4598         entry->prev_cookie = entry->cookie;
4599         p = xdr_decode_hyper(p, &entry->cookie);
4600         entry->len = ntohl(*p++);
4601         entry->name = (const char *) p;
4602         p += XDR_QUADLEN(entry->len);
4603
4604         /*
4605          * In case the server doesn't return an inode number,
4606          * we fake one here.  (We don't use inode number 0,
4607          * since glibc seems to choke on it...)
4608          */
4609         entry->ino = 1;
4610
4611         len = ntohl(*p++);              /* bitmap length */
4612         if (len-- > 0) {
4613                 bitmap[0] = ntohl(*p++);
4614                 if (len-- > 0) {
4615                         bitmap[1] = ntohl(*p++);
4616                         p += len;
4617                 }
4618         }
4619         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4620         if (len > 0) {
4621                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4622                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4623                         /* Ignore the return value of rdattr_error for now */
4624                         p++;
4625                         len--;
4626                 }
4627                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4628                         xdr_decode_hyper(p, &entry->ino);
4629                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4630                         xdr_decode_hyper(p, &entry->ino);
4631                 p += len;
4632         }
4633
4634         entry->eof = !p[0] && p[1];
4635         return p;
4636 }
4637
4638 /*
4639  * We need to translate between nfs status return values and
4640  * the local errno values which may not be the same.
4641  */
4642 static struct {
4643         int stat;
4644         int errno;
4645 } nfs_errtbl[] = {
4646         { NFS4_OK,              0               },
4647         { NFS4ERR_PERM,         -EPERM          },
4648         { NFS4ERR_NOENT,        -ENOENT         },
4649         { NFS4ERR_IO,           -errno_NFSERR_IO},
4650         { NFS4ERR_NXIO,         -ENXIO          },
4651         { NFS4ERR_ACCESS,       -EACCES         },
4652         { NFS4ERR_EXIST,        -EEXIST         },
4653         { NFS4ERR_XDEV,         -EXDEV          },
4654         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4655         { NFS4ERR_ISDIR,        -EISDIR         },
4656         { NFS4ERR_INVAL,        -EINVAL         },
4657         { NFS4ERR_FBIG,         -EFBIG          },
4658         { NFS4ERR_NOSPC,        -ENOSPC         },
4659         { NFS4ERR_ROFS,         -EROFS          },
4660         { NFS4ERR_MLINK,        -EMLINK         },
4661         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4662         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4663         { NFS4ERR_DQUOT,        -EDQUOT         },
4664         { NFS4ERR_STALE,        -ESTALE         },
4665         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4666         { NFS4ERR_BADOWNER,     -EINVAL         },
4667         { NFS4ERR_BADNAME,      -EINVAL         },
4668         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4669         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4670         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4671         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4672         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4673         { NFS4ERR_LOCKED,       -EAGAIN         },
4674         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4675         { NFS4ERR_SYMLINK,      -ELOOP          },
4676         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4677         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4678         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4679                                                     * to be handled by a
4680                                                     * middle-layer.
4681                                                     */
4682         { -1,                   -EIO            }
4683 };
4684
4685 /*
4686  * Convert an NFS error code to a local one.
4687  * This one is used jointly by NFSv2 and NFSv3.
4688  */
4689 static int
4690 nfs4_stat_to_errno(int stat)
4691 {
4692         int i;
4693         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4694                 if (nfs_errtbl[i].stat == stat)
4695                         return nfs_errtbl[i].errno;
4696         }
4697         if (stat <= 10000 || stat > 10100) {
4698                 /* The server is looney tunes. */
4699                 return -ESERVERFAULT;
4700         }
4701         /* If we cannot translate the error, the recovery routines should
4702          * handle it.
4703          * Note: remaining NFSv4 error codes have values > 10000, so should
4704          * not conflict with native Linux error codes.
4705          */
4706         return -stat;
4707 }
4708
4709 #define PROC(proc, argtype, restype)                            \
4710 [NFSPROC4_CLNT_##proc] = {                                      \
4711         .p_proc   = NFSPROC4_COMPOUND,                          \
4712         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4713         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4714         .p_arglen = NFS4_##argtype##_sz,                        \
4715         .p_replen = NFS4_##restype##_sz,                        \
4716         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4717         .p_name   = #proc,                                      \
4718     }
4719
4720 struct rpc_procinfo     nfs4_procedures[] = {
4721   PROC(READ,            enc_read,       dec_read),
4722   PROC(WRITE,           enc_write,      dec_write),
4723   PROC(COMMIT,          enc_commit,     dec_commit),
4724   PROC(OPEN,            enc_open,       dec_open),
4725   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4726   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4727   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4728   PROC(CLOSE,           enc_close,      dec_close),
4729   PROC(SETATTR,         enc_setattr,    dec_setattr),
4730   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4731   PROC(RENEW,           enc_renew,      dec_renew),
4732   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4733   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4734   PROC(LOCK,            enc_lock,       dec_lock),
4735   PROC(LOCKT,           enc_lockt,      dec_lockt),
4736   PROC(LOCKU,           enc_locku,      dec_locku),
4737   PROC(ACCESS,          enc_access,     dec_access),
4738   PROC(GETATTR,         enc_getattr,    dec_getattr),
4739   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4740   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4741   PROC(REMOVE,          enc_remove,     dec_remove),
4742   PROC(RENAME,          enc_rename,     dec_rename),
4743   PROC(LINK,            enc_link,       dec_link),
4744   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4745   PROC(CREATE,          enc_create,     dec_create),
4746   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4747   PROC(STATFS,          enc_statfs,     dec_statfs),
4748   PROC(READLINK,        enc_readlink,   dec_readlink),
4749   PROC(READDIR,         enc_readdir,    dec_readdir),
4750   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4751   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4752   PROC(GETACL,          enc_getacl,     dec_getacl),
4753   PROC(SETACL,          enc_setacl,     dec_setacl),
4754   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4755 };
4756
4757 struct rpc_version              nfs_version4 = {
4758         .number                 = 4,
4759         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4760         .procs                  = nfs4_procedures
4761 };
4762
4763 /*
4764  * Local variables:
4765  *  c-basic-offset: 8
4766  * End:
4767  */