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 const umode_t nfs_type2fmt[] = {
 526         [NF4BAD] = 0,
 527         [NF4REG] = S_IFREG,
 528         [NF4DIR] = S_IFDIR,
 529         [NF4BLK] = S_IFBLK,
 530         [NF4CHR] = S_IFCHR,
 531         [NF4LNK] = S_IFLNK,
 532         [NF4SOCK] = S_IFSOCK,
 533         [NF4FIFO] = S_IFIFO,
 534         [NF4ATTRDIR] = 0,
 535         [NF4NAMEDATTR] = 0,
 536 };
 537
 538 struct compound_hdr {
 539         int32_t         status;
 540         uint32_t        nops;
 541         __be32 *        nops_p;
 542         uint32_t        taglen;
 543         char *          tag;
 544 };
 545
 546 /*
 547  * START OF "GENERIC" ENCODE ROUTINES.
 548  *   These may look a little ugly since they are imported from a "generic"
 549  * set of XDR encode/decode routines which are intended to be shared by
 550  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 551  *
 552  * If the pain of reading these is too great, it should be a straightforward
 553  * task to translate them into Linux-specific versions which are more
 554  * consistent with the style used in NFSv2/v3...
 555  */
 556 #define WRITE32(n)               *p++ = htonl(n)
 557 #define WRITE64(n)               do {                           \
 558         *p++ = htonl((uint32_t)((n) >> 32));                            \
 559         *p++ = htonl((uint32_t)(n));                                    \
 560 } while (0)
 561 #define WRITEMEM(ptr,nbytes)     do {                           \
 562         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 563 } while (0)
 564
 565 #define RESERVE_SPACE(nbytes)   do {                            \
 566         p = xdr_reserve_space(xdr, nbytes);                     \
 567         BUG_ON(!p);                                             \
 568 } while (0)
 569
 570 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 571 {
 572         __be32 *p;
 573
 574         p = xdr_reserve_space(xdr, 4 + len);
 575         BUG_ON(p == NULL);
 576         xdr_encode_opaque(p, str, len);
 577 }
 578
 579 static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 580 {
 581         __be32 *p;
 582
 583         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 584         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 585         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 586         WRITE32(hdr->taglen);
 587         WRITEMEM(hdr->tag, hdr->taglen);
 588         WRITE32(NFS4_MINOR_VERSION);
 589         hdr->nops_p = p;
 590         WRITE32(hdr->nops);
 591 }
 592
 593 static void encode_nops(struct compound_hdr *hdr)
 594 {
 595         *hdr->nops_p = htonl(hdr->nops);
 596 }
 597
 598 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 599 {
 600         __be32 *p;
 601
 602         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 603         BUG_ON(p == NULL);
 604         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 605 }
 606
 607 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 608 {
 609         char owner_name[IDMAP_NAMESZ];
 610         char owner_group[IDMAP_NAMESZ];
 611         int owner_namelen = 0;
 612         int owner_grouplen = 0;
 613         __be32 *p;
 614         __be32 *q;
 615         int len;
 616         uint32_t bmval0 = 0;
 617         uint32_t bmval1 = 0;
 618
 619         /*
 620          * We reserve enough space to write the entire attribute buffer at once.
 621          * In the worst-case, this would be
 622          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 623          *          = 36 bytes, plus any contribution from variable-length fields
 624          *            such as owner/group.
 625          */
 626         len = 16;
 627
 628         /* Sigh */
 629         if (iap->ia_valid & ATTR_SIZE)
 630                 len += 8;
 631         if (iap->ia_valid & ATTR_MODE)
 632                 len += 4;
 633         if (iap->ia_valid & ATTR_UID) {
 634                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 635                 if (owner_namelen < 0) {
 636                         dprintk("nfs: couldn't resolve uid %d to string\n",
 637                                         iap->ia_uid);
 638                         /* XXX */
 639                         strcpy(owner_name, "nobody");
 640                         owner_namelen = sizeof("nobody") - 1;
 641                         /* goto out; */
 642                 }
 643                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 644         }
 645         if (iap->ia_valid & ATTR_GID) {
 646                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 647                 if (owner_grouplen < 0) {
 648                         dprintk("nfs: couldn't resolve gid %d to string\n",
 649                                         iap->ia_gid);
 650                         strcpy(owner_group, "nobody");
 651                         owner_grouplen = sizeof("nobody") - 1;
 652                         /* goto out; */
 653                 }
 654                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 655         }
 656         if (iap->ia_valid & ATTR_ATIME_SET)
 657                 len += 16;
 658         else if (iap->ia_valid & ATTR_ATIME)
 659                 len += 4;
 660         if (iap->ia_valid & ATTR_MTIME_SET)
 661                 len += 16;
 662         else if (iap->ia_valid & ATTR_MTIME)
 663                 len += 4;
 664         RESERVE_SPACE(len);
 665
 666         /*
 667          * We write the bitmap length now, but leave the bitmap and the attribute
 668          * buffer length to be backfilled at the end of this routine.
 669          */
 670         WRITE32(2);
 671         q = p;
 672         p += 3;
 673
 674         if (iap->ia_valid & ATTR_SIZE) {
 675                 bmval0 |= FATTR4_WORD0_SIZE;
 676                 WRITE64(iap->ia_size);
 677         }
 678         if (iap->ia_valid & ATTR_MODE) {
 679                 bmval1 |= FATTR4_WORD1_MODE;
 680                 WRITE32(iap->ia_mode & S_IALLUGO);
 681         }
 682         if (iap->ia_valid & ATTR_UID) {
 683                 bmval1 |= FATTR4_WORD1_OWNER;
 684                 WRITE32(owner_namelen);
 685                 WRITEMEM(owner_name, owner_namelen);
 686         }
 687         if (iap->ia_valid & ATTR_GID) {
 688                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 689                 WRITE32(owner_grouplen);
 690                 WRITEMEM(owner_group, owner_grouplen);
 691         }
 692         if (iap->ia_valid & ATTR_ATIME_SET) {
 693                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 694                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 695                 WRITE32(0);
 696                 WRITE32(iap->ia_mtime.tv_sec);
 697                 WRITE32(iap->ia_mtime.tv_nsec);
 698         }
 699         else if (iap->ia_valid & ATTR_ATIME) {
 700                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 701                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 702         }
 703         if (iap->ia_valid & ATTR_MTIME_SET) {
 704                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 705                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 706                 WRITE32(0);
 707                 WRITE32(iap->ia_mtime.tv_sec);
 708                 WRITE32(iap->ia_mtime.tv_nsec);
 709         }
 710         else if (iap->ia_valid & ATTR_MTIME) {
 711                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 712                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 713         }
 714
 715         /*
 716          * Now we backfill the bitmap and the attribute buffer length.
 717          */
 718         if (len != ((char *)p - (char *)q) + 4) {
 719                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 720                                 len, ((char *)p - (char *)q) + 4);
 721                 BUG();
 722         }
 723         len = (char *)p - (char *)q - 12;
 724         *q++ = htonl(bmval0);
 725         *q++ = htonl(bmval1);
 726         *q++ = htonl(len);
 727
 728 /* out: */
 729 }
 730
 731 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 732 {
 733         __be32 *p;
 734
 735         RESERVE_SPACE(8);
 736         WRITE32(OP_ACCESS);
 737         WRITE32(access);
 738         hdr->nops++;
 739 }
 740
 741 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 742 {
 743         __be32 *p;
 744
 745         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 746         WRITE32(OP_CLOSE);
 747         WRITE32(arg->seqid->sequence->counter);
 748         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 749         hdr->nops++;
 750 }
 751
 752 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 753 {
 754         __be32 *p;
 755
 756         RESERVE_SPACE(16);
 757         WRITE32(OP_COMMIT);
 758         WRITE64(args->offset);
 759         WRITE32(args->count);
 760         hdr->nops++;
 761 }
 762
 763 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 764 {
 765         __be32 *p;
 766
 767         RESERVE_SPACE(8);
 768         WRITE32(OP_CREATE);
 769         WRITE32(create->ftype);
 770
 771         switch (create->ftype) {
 772         case NF4LNK:
 773                 RESERVE_SPACE(4);
 774                 WRITE32(create->u.symlink.len);
 775                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 776                 break;
 777
 778         case NF4BLK: case NF4CHR:
 779                 RESERVE_SPACE(8);
 780                 WRITE32(create->u.device.specdata1);
 781                 WRITE32(create->u.device.specdata2);
 782                 break;
 783
 784         default:
 785                 break;
 786         }
 787
 788         RESERVE_SPACE(4 + create->name->len);
 789         WRITE32(create->name->len);
 790         WRITEMEM(create->name->name, create->name->len);
 791         hdr->nops++;
 792
 793         encode_attrs(xdr, create->attrs, create->server);
 794 }
 795
 796 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 797 {
 798         __be32 *p;
 799
 800         RESERVE_SPACE(12);
 801         WRITE32(OP_GETATTR);
 802         WRITE32(1);
 803         WRITE32(bitmap);
 804         hdr->nops++;
 805 }
 806
 807 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 808 {
 809         __be32 *p;
 810
 811         RESERVE_SPACE(16);
 812         WRITE32(OP_GETATTR);
 813         WRITE32(2);
 814         WRITE32(bm0);
 815         WRITE32(bm1);
 816         hdr->nops++;
 817 }
 818
 819 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 820 {
 821         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 822                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 823 }
 824
 825 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 826 {
 827         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 828                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 829 }
 830
 831 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 832 {
 833         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 834                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 835 }
 836
 837 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 838 {
 839         __be32 *p;
 840
 841         RESERVE_SPACE(4);
 842         WRITE32(OP_GETFH);
 843         hdr->nops++;
 844 }
 845
 846 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 847 {
 848         __be32 *p;
 849
 850         RESERVE_SPACE(8 + name->len);
 851         WRITE32(OP_LINK);
 852         WRITE32(name->len);
 853         WRITEMEM(name->name, name->len);
 854         hdr->nops++;
 855 }
 856
 857 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 858 {
 859         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 860                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 861         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 862 }
 863
 864 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 865 {
 866         if (fl->fl_end == OFFSET_MAX)
 867                 return ~(uint64_t)0;
 868         return fl->fl_end - fl->fl_start + 1;
 869 }
 870
 871 /*
 872  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 873  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 874  */
 875 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 876 {
 877         __be32 *p;
 878
 879         RESERVE_SPACE(32);
 880         WRITE32(OP_LOCK);
 881         WRITE32(nfs4_lock_type(args->fl, args->block));
 882         WRITE32(args->reclaim);
 883         WRITE64(args->fl->fl_start);
 884         WRITE64(nfs4_lock_length(args->fl));
 885         WRITE32(args->new_lock_owner);
 886         if (args->new_lock_owner){
 887                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 888                 WRITE32(args->open_seqid->sequence->counter);
 889                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 890                 WRITE32(args->lock_seqid->sequence->counter);
 891                 WRITE64(args->lock_owner.clientid);
 892                 WRITE32(16);
 893                 WRITEMEM("lock id:", 8);
 894                 WRITE64(args->lock_owner.id);
 895         }
 896         else {
 897                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 898                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 899                 WRITE32(args->lock_seqid->sequence->counter);
 900         }
 901         hdr->nops++;
 902 }
 903
 904 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 905 {
 906         __be32 *p;
 907
 908         RESERVE_SPACE(52);
 909         WRITE32(OP_LOCKT);
 910         WRITE32(nfs4_lock_type(args->fl, 0));
 911         WRITE64(args->fl->fl_start);
 912         WRITE64(nfs4_lock_length(args->fl));
 913         WRITE64(args->lock_owner.clientid);
 914         WRITE32(16);
 915         WRITEMEM("lock id:", 8);
 916         WRITE64(args->lock_owner.id);
 917         hdr->nops++;
 918 }
 919
 920 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 921 {
 922         __be32 *p;
 923
 924         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 925         WRITE32(OP_LOCKU);
 926         WRITE32(nfs4_lock_type(args->fl, 0));
 927         WRITE32(args->seqid->sequence->counter);
 928         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 929         WRITE64(args->fl->fl_start);
 930         WRITE64(nfs4_lock_length(args->fl));
 931         hdr->nops++;
 932 }
 933
 934 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 935 {
 936         int len = name->len;
 937         __be32 *p;
 938
 939         RESERVE_SPACE(8 + len);
 940         WRITE32(OP_LOOKUP);
 941         WRITE32(len);
 942         WRITEMEM(name->name, len);
 943         hdr->nops++;
 944 }
 945
 946 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 947 {
 948         __be32 *p;
 949
 950         RESERVE_SPACE(8);
 951         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 952         case FMODE_READ:
 953                 WRITE32(NFS4_SHARE_ACCESS_READ);
 954                 break;
 955         case FMODE_WRITE:
 956                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 957                 break;
 958         case FMODE_READ|FMODE_WRITE:
 959                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 960                 break;
 961         default:
 962                 WRITE32(0);
 963         }
 964         WRITE32(0);             /* for linux, share_deny = 0 always */
 965 }
 966
 967 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 968 {
 969         __be32 *p;
 970  /*
 971  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 972  * owner 4 = 32
 973  */
 974         RESERVE_SPACE(8);
 975         WRITE32(OP_OPEN);
 976         WRITE32(arg->seqid->sequence->counter);
 977         encode_share_access(xdr, arg->fmode);
 978         RESERVE_SPACE(28);
 979         WRITE64(arg->clientid);
 980         WRITE32(16);
 981         WRITEMEM("open id:", 8);
 982         WRITE64(arg->id);
 983 }
 984
 985 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 986 {
 987         __be32 *p;
 988
 989         RESERVE_SPACE(4);
 990         switch(arg->open_flags & O_EXCL) {
 991         case 0:
 992                 WRITE32(NFS4_CREATE_UNCHECKED);
 993                 encode_attrs(xdr, arg->u.attrs, arg->server);
 994                 break;
 995         default:
 996                 WRITE32(NFS4_CREATE_EXCLUSIVE);
 997                 encode_nfs4_verifier(xdr, &arg->u.verifier);
 998         }
 999 }
1000
1001 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1002 {
1003         __be32 *p;
1004
1005         RESERVE_SPACE(4);
1006         switch (arg->open_flags & O_CREAT) {
1007         case 0:
1008                 WRITE32(NFS4_OPEN_NOCREATE);
1009                 break;
1010         default:
1011                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1012                 WRITE32(NFS4_OPEN_CREATE);
1013                 encode_createmode(xdr, arg);
1014         }
1015 }
1016
1017 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1018 {
1019         __be32 *p;
1020
1021         RESERVE_SPACE(4);
1022         switch (delegation_type) {
1023         case 0:
1024                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1025                 break;
1026         case FMODE_READ:
1027                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1028                 break;
1029         case FMODE_WRITE|FMODE_READ:
1030                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1031                 break;
1032         default:
1033                 BUG();
1034         }
1035 }
1036
1037 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1038 {
1039         __be32 *p;
1040
1041         RESERVE_SPACE(4);
1042         WRITE32(NFS4_OPEN_CLAIM_NULL);
1043         encode_string(xdr, name->len, name->name);
1044 }
1045
1046 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1047 {
1048         __be32 *p;
1049
1050         RESERVE_SPACE(4);
1051         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1052         encode_delegation_type(xdr, type);
1053 }
1054
1055 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1056 {
1057         __be32 *p;
1058
1059         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1060         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1061         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1062         encode_string(xdr, name->len, name->name);
1063 }
1064
1065 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1066 {
1067         encode_openhdr(xdr, arg);
1068         encode_opentype(xdr, arg);
1069         switch (arg->claim) {
1070         case NFS4_OPEN_CLAIM_NULL:
1071                 encode_claim_null(xdr, arg->name);
1072                 break;
1073         case NFS4_OPEN_CLAIM_PREVIOUS:
1074                 encode_claim_previous(xdr, arg->u.delegation_type);
1075                 break;
1076         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1077                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1078                 break;
1079         default:
1080                 BUG();
1081         }
1082         hdr->nops++;
1083 }
1084
1085 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1086 {
1087         __be32 *p;
1088
1089         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1090         WRITE32(OP_OPEN_CONFIRM);
1091         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1092         WRITE32(arg->seqid->sequence->counter);
1093         hdr->nops++;
1094 }
1095
1096 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1097 {
1098         __be32 *p;
1099
1100         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1101         WRITE32(OP_OPEN_DOWNGRADE);
1102         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1103         WRITE32(arg->seqid->sequence->counter);
1104         encode_share_access(xdr, arg->fmode);
1105         hdr->nops++;
1106 }
1107
1108 static void
1109 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1110 {
1111         int len = fh->size;
1112         __be32 *p;
1113
1114         RESERVE_SPACE(8 + len);
1115         WRITE32(OP_PUTFH);
1116         WRITE32(len);
1117         WRITEMEM(fh->data, len);
1118         hdr->nops++;
1119 }
1120
1121 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1122 {
1123         __be32 *p;
1124
1125         RESERVE_SPACE(4);
1126         WRITE32(OP_PUTROOTFH);
1127         hdr->nops++;
1128 }
1129
1130 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1131 {
1132         nfs4_stateid stateid;
1133         __be32 *p;
1134
1135         RESERVE_SPACE(NFS4_STATEID_SIZE);
1136         if (ctx->state != NULL) {
1137                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1138                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1139         } else
1140                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1141 }
1142
1143 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1144 {
1145         __be32 *p;
1146
1147         RESERVE_SPACE(4);
1148         WRITE32(OP_READ);
1149
1150         encode_stateid(xdr, args->context);
1151
1152         RESERVE_SPACE(12);
1153         WRITE64(args->offset);
1154         WRITE32(args->count);
1155         hdr->nops++;
1156 }
1157
1158 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1159 {
1160         uint32_t attrs[2] = {
1161                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1162                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1163         };
1164         __be32 *p;
1165
1166         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1167         WRITE32(OP_READDIR);
1168         WRITE64(readdir->cookie);
1169         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1170         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1171         WRITE32(readdir->count);
1172         WRITE32(2);
1173         /* Switch to mounted_on_fileid if the server supports it */
1174         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1175                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1176         else
1177                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1178         WRITE32(attrs[0] & readdir->bitmask[0]);
1179         WRITE32(attrs[1] & readdir->bitmask[1]);
1180         hdr->nops++;
1181         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1182                         __func__,
1183                         (unsigned long long)readdir->cookie,
1184                         ((u32 *)readdir->verifier.data)[0],
1185                         ((u32 *)readdir->verifier.data)[1],
1186                         attrs[0] & readdir->bitmask[0],
1187                         attrs[1] & readdir->bitmask[1]);
1188 }
1189
1190 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         RESERVE_SPACE(4);
1195         WRITE32(OP_READLINK);
1196         hdr->nops++;
1197 }
1198
1199 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         RESERVE_SPACE(8 + name->len);
1204         WRITE32(OP_REMOVE);
1205         WRITE32(name->len);
1206         WRITEMEM(name->name, name->len);
1207         hdr->nops++;
1208 }
1209
1210 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1211 {
1212         __be32 *p;
1213
1214         RESERVE_SPACE(8 + oldname->len);
1215         WRITE32(OP_RENAME);
1216         WRITE32(oldname->len);
1217         WRITEMEM(oldname->name, oldname->len);
1218
1219         RESERVE_SPACE(4 + newname->len);
1220         WRITE32(newname->len);
1221         WRITEMEM(newname->name, newname->len);
1222         hdr->nops++;
1223 }
1224
1225 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1226 {
1227         __be32 *p;
1228
1229         RESERVE_SPACE(12);
1230         WRITE32(OP_RENEW);
1231         WRITE64(client_stateid->cl_clientid);
1232         hdr->nops++;
1233 }
1234
1235 static void
1236 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1237 {
1238         __be32 *p;
1239
1240         RESERVE_SPACE(4);
1241         WRITE32(OP_RESTOREFH);
1242         hdr->nops++;
1243 }
1244
1245 static int
1246 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1247 {
1248         __be32 *p;
1249
1250         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1251         WRITE32(OP_SETATTR);
1252         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1253         RESERVE_SPACE(2*4);
1254         WRITE32(1);
1255         WRITE32(FATTR4_WORD0_ACL);
1256         if (arg->acl_len % 4)
1257                 return -EINVAL;
1258         RESERVE_SPACE(4);
1259         WRITE32(arg->acl_len);
1260         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1261         hdr->nops++;
1262         return 0;
1263 }
1264
1265 static void
1266 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4);
1271         WRITE32(OP_SAVEFH);
1272         hdr->nops++;
1273 }
1274
1275 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1276 {
1277         __be32 *p;
1278
1279         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1280         WRITE32(OP_SETATTR);
1281         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1282         hdr->nops++;
1283         encode_attrs(xdr, arg->iap, server);
1284 }
1285
1286 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1287 {
1288         __be32 *p;
1289
1290         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1291         WRITE32(OP_SETCLIENTID);
1292         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1293
1294         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1295         RESERVE_SPACE(4);
1296         WRITE32(setclientid->sc_prog);
1297         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1298         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1299         RESERVE_SPACE(4);
1300         WRITE32(setclientid->sc_cb_ident);
1301         hdr->nops++;
1302 }
1303
1304 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1305 {
1306         __be32 *p;
1307
1308         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1309         WRITE32(OP_SETCLIENTID_CONFIRM);
1310         WRITE64(client_state->cl_clientid);
1311         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1312         hdr->nops++;
1313 }
1314
1315 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1316 {
1317         __be32 *p;
1318
1319         RESERVE_SPACE(4);
1320         WRITE32(OP_WRITE);
1321
1322         encode_stateid(xdr, args->context);
1323
1324         RESERVE_SPACE(16);
1325         WRITE64(args->offset);
1326         WRITE32(args->stable);
1327         WRITE32(args->count);
1328
1329         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1330         hdr->nops++;
1331 }
1332
1333 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1334 {
1335         __be32 *p;
1336
1337         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1338
1339         WRITE32(OP_DELEGRETURN);
1340         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1341         hdr->nops++;
1342 }
1343 /*
1344  * END OF "GENERIC" ENCODE ROUTINES.
1345  */
1346
1347 /*
1348  * Encode an ACCESS request
1349  */
1350 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1351 {
1352         struct xdr_stream xdr;
1353         struct compound_hdr hdr = {
1354                 .nops = 0,
1355         };
1356
1357         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1358         encode_compound_hdr(&xdr, &hdr);
1359         encode_putfh(&xdr, args->fh, &hdr);
1360         encode_access(&xdr, args->access, &hdr);
1361         encode_getfattr(&xdr, args->bitmask, &hdr);
1362         encode_nops(&hdr);
1363         return 0;
1364 }
1365
1366 /*
1367  * Encode LOOKUP request
1368  */
1369 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1370 {
1371         struct xdr_stream xdr;
1372         struct compound_hdr hdr = {
1373                 .nops = 0,
1374         };
1375
1376         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1377         encode_compound_hdr(&xdr, &hdr);
1378         encode_putfh(&xdr, args->dir_fh, &hdr);
1379         encode_lookup(&xdr, args->name, &hdr);
1380         encode_getfh(&xdr, &hdr);
1381         encode_getfattr(&xdr, args->bitmask, &hdr);
1382         encode_nops(&hdr);
1383         return 0;
1384 }
1385
1386 /*
1387  * Encode LOOKUP_ROOT request
1388  */
1389 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1390 {
1391         struct xdr_stream xdr;
1392         struct compound_hdr hdr = {
1393                 .nops = 0,
1394         };
1395
1396         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1397         encode_compound_hdr(&xdr, &hdr);
1398         encode_putrootfh(&xdr, &hdr);
1399         encode_getfh(&xdr, &hdr);
1400         encode_getfattr(&xdr, args->bitmask, &hdr);
1401         encode_nops(&hdr);
1402         return 0;
1403 }
1404
1405 /*
1406  * Encode REMOVE request
1407  */
1408 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1409 {
1410         struct xdr_stream xdr;
1411         struct compound_hdr hdr = {
1412                 .nops = 0,
1413         };
1414
1415         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1416         encode_compound_hdr(&xdr, &hdr);
1417         encode_putfh(&xdr, args->fh, &hdr);
1418         encode_remove(&xdr, &args->name, &hdr);
1419         encode_getfattr(&xdr, args->bitmask, &hdr);
1420         encode_nops(&hdr);
1421         return 0;
1422 }
1423
1424 /*
1425  * Encode RENAME request
1426  */
1427 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1428 {
1429         struct xdr_stream xdr;
1430         struct compound_hdr hdr = {
1431                 .nops = 0,
1432         };
1433
1434         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435         encode_compound_hdr(&xdr, &hdr);
1436         encode_putfh(&xdr, args->old_dir, &hdr);
1437         encode_savefh(&xdr, &hdr);
1438         encode_putfh(&xdr, args->new_dir, &hdr);
1439         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1440         encode_getfattr(&xdr, args->bitmask, &hdr);
1441         encode_restorefh(&xdr, &hdr);
1442         encode_getfattr(&xdr, args->bitmask, &hdr);
1443         encode_nops(&hdr);
1444         return 0;
1445 }
1446
1447 /*
1448  * Encode LINK request
1449  */
1450 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1451 {
1452         struct xdr_stream xdr;
1453         struct compound_hdr hdr = {
1454                 .nops = 0,
1455         };
1456
1457         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1458         encode_compound_hdr(&xdr, &hdr);
1459         encode_putfh(&xdr, args->fh, &hdr);
1460         encode_savefh(&xdr, &hdr);
1461         encode_putfh(&xdr, args->dir_fh, &hdr);
1462         encode_link(&xdr, args->name, &hdr);
1463         encode_getfattr(&xdr, args->bitmask, &hdr);
1464         encode_restorefh(&xdr, &hdr);
1465         encode_getfattr(&xdr, args->bitmask, &hdr);
1466         encode_nops(&hdr);
1467         return 0;
1468 }
1469
1470 /*
1471  * Encode CREATE request
1472  */
1473 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1474 {
1475         struct xdr_stream xdr;
1476         struct compound_hdr hdr = {
1477                 .nops = 0,
1478         };
1479
1480         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1481         encode_compound_hdr(&xdr, &hdr);
1482         encode_putfh(&xdr, args->dir_fh, &hdr);
1483         encode_savefh(&xdr, &hdr);
1484         encode_create(&xdr, args, &hdr);
1485         encode_getfh(&xdr, &hdr);
1486         encode_getfattr(&xdr, args->bitmask, &hdr);
1487         encode_restorefh(&xdr, &hdr);
1488         encode_getfattr(&xdr, args->bitmask, &hdr);
1489         encode_nops(&hdr);
1490         return 0;
1491 }
1492
1493 /*
1494  * Encode SYMLINK request
1495  */
1496 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1497 {
1498         return nfs4_xdr_enc_create(req, p, args);
1499 }
1500
1501 /*
1502  * Encode GETATTR request
1503  */
1504 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1505 {
1506         struct xdr_stream xdr;
1507         struct compound_hdr hdr = {
1508                 .nops = 0,
1509         };
1510
1511         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1512         encode_compound_hdr(&xdr, &hdr);
1513         encode_putfh(&xdr, args->fh, &hdr);
1514         encode_getfattr(&xdr, args->bitmask, &hdr);
1515         encode_nops(&hdr);
1516         return 0;
1517 }
1518
1519 /*
1520  * Encode a CLOSE request
1521  */
1522 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1523 {
1524         struct xdr_stream xdr;
1525         struct compound_hdr hdr = {
1526                 .nops   = 0,
1527         };
1528
1529         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1530         encode_compound_hdr(&xdr, &hdr);
1531         encode_putfh(&xdr, args->fh, &hdr);
1532         encode_close(&xdr, args, &hdr);
1533         encode_getfattr(&xdr, args->bitmask, &hdr);
1534         encode_nops(&hdr);
1535         return 0;
1536 }
1537
1538 /*
1539  * Encode an OPEN request
1540  */
1541 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1542 {
1543         struct xdr_stream xdr;
1544         struct compound_hdr hdr = {
1545                 .nops = 0,
1546         };
1547
1548         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1549         encode_compound_hdr(&xdr, &hdr);
1550         encode_putfh(&xdr, args->fh, &hdr);
1551         encode_savefh(&xdr, &hdr);
1552         encode_open(&xdr, args, &hdr);
1553         encode_getfh(&xdr, &hdr);
1554         encode_getfattr(&xdr, args->bitmask, &hdr);
1555         encode_restorefh(&xdr, &hdr);
1556         encode_getfattr(&xdr, args->bitmask, &hdr);
1557         encode_nops(&hdr);
1558         return 0;
1559 }
1560
1561 /*
1562  * Encode an OPEN_CONFIRM request
1563  */
1564 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1565 {
1566         struct xdr_stream xdr;
1567         struct compound_hdr hdr = {
1568                 .nops   = 0,
1569         };
1570
1571         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1572         encode_compound_hdr(&xdr, &hdr);
1573         encode_putfh(&xdr, args->fh, &hdr);
1574         encode_open_confirm(&xdr, args, &hdr);
1575         encode_nops(&hdr);
1576         return 0;
1577 }
1578
1579 /*
1580  * Encode an OPEN request with no attributes.
1581  */
1582 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1583 {
1584         struct xdr_stream xdr;
1585         struct compound_hdr hdr = {
1586                 .nops   = 0,
1587         };
1588
1589         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1590         encode_compound_hdr(&xdr, &hdr);
1591         encode_putfh(&xdr, args->fh, &hdr);
1592         encode_open(&xdr, args, &hdr);
1593         encode_getfattr(&xdr, args->bitmask, &hdr);
1594         encode_nops(&hdr);
1595         return 0;
1596 }
1597
1598 /*
1599  * Encode an OPEN_DOWNGRADE request
1600  */
1601 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1602 {
1603         struct xdr_stream xdr;
1604         struct compound_hdr hdr = {
1605                 .nops   = 0,
1606         };
1607
1608         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1609         encode_compound_hdr(&xdr, &hdr);
1610         encode_putfh(&xdr, args->fh, &hdr);
1611         encode_open_downgrade(&xdr, args, &hdr);
1612         encode_getfattr(&xdr, args->bitmask, &hdr);
1613         encode_nops(&hdr);
1614         return 0;
1615 }
1616
1617 /*
1618  * Encode a LOCK request
1619  */
1620 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1621 {
1622         struct xdr_stream xdr;
1623         struct compound_hdr hdr = {
1624                 .nops   = 0,
1625         };
1626
1627         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1628         encode_compound_hdr(&xdr, &hdr);
1629         encode_putfh(&xdr, args->fh, &hdr);
1630         encode_lock(&xdr, args, &hdr);
1631         encode_nops(&hdr);
1632         return 0;
1633 }
1634
1635 /*
1636  * Encode a LOCKT request
1637  */
1638 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1639 {
1640         struct xdr_stream xdr;
1641         struct compound_hdr hdr = {
1642                 .nops   = 0,
1643         };
1644
1645         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1646         encode_compound_hdr(&xdr, &hdr);
1647         encode_putfh(&xdr, args->fh, &hdr);
1648         encode_lockt(&xdr, args, &hdr);
1649         encode_nops(&hdr);
1650         return 0;
1651 }
1652
1653 /*
1654  * Encode a LOCKU request
1655  */
1656 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1657 {
1658         struct xdr_stream xdr;
1659         struct compound_hdr hdr = {
1660                 .nops   = 0,
1661         };
1662
1663         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664         encode_compound_hdr(&xdr, &hdr);
1665         encode_putfh(&xdr, args->fh, &hdr);
1666         encode_locku(&xdr, args, &hdr);
1667         encode_nops(&hdr);
1668         return 0;
1669 }
1670
1671 /*
1672  * Encode a READLINK request
1673  */
1674 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1675 {
1676         struct xdr_stream xdr;
1677         struct compound_hdr hdr = {
1678                 .nops = 0,
1679         };
1680         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1681         unsigned int replen;
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, &hdr);
1685         encode_putfh(&xdr, args->fh, &hdr);
1686         encode_readlink(&xdr, args, req, &hdr);
1687
1688         /* set up reply kvec
1689          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1690          *      + OP_READLINK + status + string length = 8
1691          */
1692         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1693         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1694                         args->pgbase, args->pglen);
1695         encode_nops(&hdr);
1696         return 0;
1697 }
1698
1699 /*
1700  * Encode a READDIR request
1701  */
1702 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1703 {
1704         struct xdr_stream xdr;
1705         struct compound_hdr hdr = {
1706                 .nops = 0,
1707         };
1708         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1709         int replen;
1710
1711         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1712         encode_compound_hdr(&xdr, &hdr);
1713         encode_putfh(&xdr, args->fh, &hdr);
1714         encode_readdir(&xdr, args, req, &hdr);
1715
1716         /* set up reply kvec
1717          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1718          *      + OP_READDIR + status + verifer(2)  = 9
1719          */
1720         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1721         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1722                          args->pgbase, args->count);
1723         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1724                         __func__, replen, args->pages,
1725                         args->pgbase, args->count);
1726         encode_nops(&hdr);
1727         return 0;
1728 }
1729
1730 /*
1731  * Encode a READ request
1732  */
1733 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1734 {
1735         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1736         struct xdr_stream xdr;
1737         struct compound_hdr hdr = {
1738                 .nops = 0,
1739         };
1740         int replen;
1741
1742         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743         encode_compound_hdr(&xdr, &hdr);
1744         encode_putfh(&xdr, args->fh, &hdr);
1745         encode_read(&xdr, args, &hdr);
1746
1747         /* set up reply kvec
1748          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1749          *       + OP_READ + status + eof + datalen = 9
1750          */
1751         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1752         xdr_inline_pages(&req->rq_rcv_buf, replen,
1753                          args->pages, args->pgbase, args->count);
1754         req->rq_rcv_buf.flags |= XDRBUF_READ;
1755         encode_nops(&hdr);
1756         return 0;
1757 }
1758
1759 /*
1760  * Encode an SETATTR request
1761  */
1762 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1763 {
1764         struct xdr_stream xdr;
1765         struct compound_hdr hdr = {
1766                 .nops   = 0,
1767         };
1768
1769         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770         encode_compound_hdr(&xdr, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_setattr(&xdr, args, args->server, &hdr);
1773         encode_getfattr(&xdr, args->bitmask, &hdr);
1774         encode_nops(&hdr);
1775         return 0;
1776 }
1777
1778 /*
1779  * Encode a GETACL request
1780  */
1781 static int
1782 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1783                 struct nfs_getaclargs *args)
1784 {
1785         struct xdr_stream xdr;
1786         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1787         struct compound_hdr hdr = {
1788                 .nops   = 0,
1789         };
1790         int replen;
1791
1792         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793         encode_compound_hdr(&xdr, &hdr);
1794         encode_putfh(&xdr, args->fh, &hdr);
1795         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1796
1797         /* set up reply buffer: */
1798         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1799         xdr_inline_pages(&req->rq_rcv_buf, replen,
1800                 args->acl_pages, args->acl_pgbase, args->acl_len);
1801         encode_nops(&hdr);
1802         return 0;
1803 }
1804
1805 /*
1806  * Encode a WRITE request
1807  */
1808 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1809 {
1810         struct xdr_stream xdr;
1811         struct compound_hdr hdr = {
1812                 .nops = 0,
1813         };
1814
1815         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1816         encode_compound_hdr(&xdr, &hdr);
1817         encode_putfh(&xdr, args->fh, &hdr);
1818         encode_write(&xdr, args, &hdr);
1819         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1820         encode_getfattr(&xdr, args->bitmask, &hdr);
1821         encode_nops(&hdr);
1822         return 0;
1823 }
1824
1825 /*
1826  *  a COMMIT request
1827  */
1828 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1829 {
1830         struct xdr_stream xdr;
1831         struct compound_hdr hdr = {
1832                 .nops = 0,
1833         };
1834
1835         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1836         encode_compound_hdr(&xdr, &hdr);
1837         encode_putfh(&xdr, args->fh, &hdr);
1838         encode_commit(&xdr, args, &hdr);
1839         encode_getfattr(&xdr, args->bitmask, &hdr);
1840         encode_nops(&hdr);
1841         return 0;
1842 }
1843
1844 /*
1845  * FSINFO request
1846  */
1847 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1848 {
1849         struct xdr_stream xdr;
1850         struct compound_hdr hdr = {
1851                 .nops   = 0,
1852         };
1853
1854         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1855         encode_compound_hdr(&xdr, &hdr);
1856         encode_putfh(&xdr, args->fh, &hdr);
1857         encode_fsinfo(&xdr, args->bitmask, &hdr);
1858         encode_nops(&hdr);
1859         return 0;
1860 }
1861
1862 /*
1863  * a PATHCONF request
1864  */
1865 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1866 {
1867         struct xdr_stream xdr;
1868         struct compound_hdr hdr = {
1869                 .nops = 0,
1870         };
1871
1872         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1873         encode_compound_hdr(&xdr, &hdr);
1874         encode_putfh(&xdr, args->fh, &hdr);
1875         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1876                            &hdr);
1877         encode_nops(&hdr);
1878         return 0;
1879 }
1880
1881 /*
1882  * a STATFS request
1883  */
1884 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1885 {
1886         struct xdr_stream xdr;
1887         struct compound_hdr hdr = {
1888                 .nops = 0,
1889         };
1890
1891         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1892         encode_compound_hdr(&xdr, &hdr);
1893         encode_putfh(&xdr, args->fh, &hdr);
1894         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1895                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1896         encode_nops(&hdr);
1897         return 0;
1898 }
1899
1900 /*
1901  * GETATTR_BITMAP request
1902  */
1903 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1904 {
1905         struct xdr_stream xdr;
1906         struct compound_hdr hdr = {
1907                 .nops = 0,
1908         };
1909
1910         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911         encode_compound_hdr(&xdr, &hdr);
1912         encode_putfh(&xdr, fhandle, &hdr);
1913         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1914                            FATTR4_WORD0_LINK_SUPPORT|
1915                            FATTR4_WORD0_SYMLINK_SUPPORT|
1916                            FATTR4_WORD0_ACLSUPPORT, &hdr);
1917         encode_nops(&hdr);
1918         return 0;
1919 }
1920
1921 /*
1922  * a RENEW request
1923  */
1924 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1925 {
1926         struct xdr_stream xdr;
1927         struct compound_hdr hdr = {
1928                 .nops   = 0,
1929         };
1930
1931         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1932         encode_compound_hdr(&xdr, &hdr);
1933         encode_renew(&xdr, clp, &hdr);
1934         encode_nops(&hdr);
1935         return 0;
1936 }
1937
1938 /*
1939  * a SETCLIENTID request
1940  */
1941 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1942 {
1943         struct xdr_stream xdr;
1944         struct compound_hdr hdr = {
1945                 .nops   = 0,
1946         };
1947
1948         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949         encode_compound_hdr(&xdr, &hdr);
1950         encode_setclientid(&xdr, sc, &hdr);
1951         encode_nops(&hdr);
1952         return 0;
1953 }
1954
1955 /*
1956  * a SETCLIENTID_CONFIRM request
1957  */
1958 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .nops   = 0,
1963         };
1964         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1965
1966         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1967         encode_compound_hdr(&xdr, &hdr);
1968         encode_setclientid_confirm(&xdr, clp, &hdr);
1969         encode_putrootfh(&xdr, &hdr);
1970         encode_fsinfo(&xdr, lease_bitmap, &hdr);
1971         encode_nops(&hdr);
1972         return 0;
1973 }
1974
1975 /*
1976  * DELEGRETURN request
1977  */
1978 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1979 {
1980         struct xdr_stream xdr;
1981         struct compound_hdr hdr = {
1982                 .nops = 0,
1983         };
1984
1985         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1986         encode_compound_hdr(&xdr, &hdr);
1987         encode_putfh(&xdr, args->fhandle, &hdr);
1988         encode_delegreturn(&xdr, args->stateid, &hdr);
1989         encode_getfattr(&xdr, args->bitmask, &hdr);
1990         encode_nops(&hdr);
1991         return 0;
1992 }
1993
1994 /*
1995  * Encode FS_LOCATIONS request
1996  */
1997 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
1998 {
1999         struct xdr_stream xdr;
2000         struct compound_hdr hdr = {
2001                 .nops = 0,
2002         };
2003         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2004         int replen;
2005
2006         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007         encode_compound_hdr(&xdr, &hdr);
2008         encode_putfh(&xdr, args->dir_fh, &hdr);
2009         encode_lookup(&xdr, args->name, &hdr);
2010         encode_fs_locations(&xdr, args->bitmask, &hdr);
2011
2012         /* set up reply
2013          *   toplevel_status + OP_PUTFH + status
2014          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2015          */
2016         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2017         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2018                         0, PAGE_SIZE);
2019         encode_nops(&hdr);
2020         return 0;
2021 }
2022
2023 /*
2024  * START OF "GENERIC" DECODE ROUTINES.
2025  *   These may look a little ugly since they are imported from a "generic"
2026  * set of XDR encode/decode routines which are intended to be shared by
2027  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2028  *
2029  * If the pain of reading these is too great, it should be a straightforward
2030  * task to translate them into Linux-specific versions which are more
2031  * consistent with the style used in NFSv2/v3...
2032  */
2033 #define READ32(x)         (x) = ntohl(*p++)
2034 #define READ64(x)         do {                  \
2035         (x) = (u64)ntohl(*p++) << 32;           \
2036         (x) |= ntohl(*p++);                     \
2037 } while (0)
2038 #define READTIME(x)       do {                  \
2039         p++;                                    \
2040         (x.tv_sec) = ntohl(*p++);               \
2041         (x.tv_nsec) = ntohl(*p++);              \
2042 } while (0)
2043 #define COPYMEM(x,nbytes) do {                  \
2044         memcpy((x), p, nbytes);                 \
2045         p += XDR_QUADLEN(nbytes);               \
2046 } while (0)
2047
2048 #define READ_BUF(nbytes)  do { \
2049         p = xdr_inline_decode(xdr, nbytes); \
2050         if (unlikely(!p)) { \
2051                 dprintk("nfs: %s: prematurely hit end of receive" \
2052                                 " buffer\n", __func__); \
2053                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2054                                 __func__, xdr->p, nbytes, xdr->end); \
2055                 return -EIO; \
2056         } \
2057 } while (0)
2058
2059 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2060 {
2061         __be32 *p;
2062
2063         READ_BUF(4);
2064         READ32(*len);
2065         READ_BUF(*len);
2066         *string = (char *)p;
2067         return 0;
2068 }
2069
2070 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2071 {
2072         __be32 *p;
2073
2074         READ_BUF(8);
2075         READ32(hdr->status);
2076         READ32(hdr->taglen);
2077
2078         READ_BUF(hdr->taglen + 4);
2079         hdr->tag = (char *)p;
2080         p += XDR_QUADLEN(hdr->taglen);
2081         READ32(hdr->nops);
2082         if (unlikely(hdr->nops < 1))
2083                 return nfs4_stat_to_errno(hdr->status);
2084         return 0;
2085 }
2086
2087 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2088 {
2089         __be32 *p;
2090         uint32_t opnum;
2091         int32_t nfserr;
2092
2093         READ_BUF(8);
2094         READ32(opnum);
2095         if (opnum != expected) {
2096                 dprintk("nfs: Server returned operation"
2097                         " %d but we issued a request for %d\n",
2098                                 opnum, expected);
2099                 return -EIO;
2100         }
2101         READ32(nfserr);
2102         if (nfserr != NFS_OK)
2103                 return nfs4_stat_to_errno(nfserr);
2104         return 0;
2105 }
2106
2107 /* Dummy routine */
2108 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2109 {
2110         __be32 *p;
2111         unsigned int strlen;
2112         char *str;
2113
2114         READ_BUF(12);
2115         return decode_opaque_inline(xdr, &strlen, &str);
2116 }
2117
2118 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2119 {
2120         uint32_t bmlen;
2121         __be32 *p;
2122
2123         READ_BUF(4);
2124         READ32(bmlen);
2125
2126         bitmap[0] = bitmap[1] = 0;
2127         READ_BUF((bmlen << 2));
2128         if (bmlen > 0) {
2129                 READ32(bitmap[0]);
2130                 if (bmlen > 1)
2131                         READ32(bitmap[1]);
2132         }
2133         return 0;
2134 }
2135
2136 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2137 {
2138         __be32 *p;
2139
2140         READ_BUF(4);
2141         READ32(*attrlen);
2142         *savep = xdr->p;
2143         return 0;
2144 }
2145
2146 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2147 {
2148         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2149                 decode_attr_bitmap(xdr, bitmask);
2150                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2151         } else
2152                 bitmask[0] = bitmask[1] = 0;
2153         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2154         return 0;
2155 }
2156
2157 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2158 {
2159         __be32 *p;
2160         int ret = 0;
2161
2162         *type = 0;
2163         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2164                 return -EIO;
2165         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2166                 READ_BUF(4);
2167                 READ32(*type);
2168                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2169                         dprintk("%s: bad type %d\n", __func__, *type);
2170                         return -EIO;
2171                 }
2172                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2173                 ret = NFS_ATTR_FATTR_TYPE;
2174         }
2175         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2176         return ret;
2177 }
2178
2179 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2180 {
2181         __be32 *p;
2182         int ret = 0;
2183
2184         *change = 0;
2185         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2186                 return -EIO;
2187         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2188                 READ_BUF(8);
2189                 READ64(*change);
2190                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2191                 ret = NFS_ATTR_FATTR_CHANGE;
2192         }
2193         dprintk("%s: change attribute=%Lu\n", __func__,
2194                         (unsigned long long)*change);
2195         return ret;
2196 }
2197
2198 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2199 {
2200         __be32 *p;
2201         int ret = 0;
2202
2203         *size = 0;
2204         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2205                 return -EIO;
2206         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2207                 READ_BUF(8);
2208                 READ64(*size);
2209                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2210                 ret = NFS_ATTR_FATTR_SIZE;
2211         }
2212         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2213         return ret;
2214 }
2215
2216 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2217 {
2218         __be32 *p;
2219
2220         *res = 0;
2221         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2222                 return -EIO;
2223         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2224                 READ_BUF(4);
2225                 READ32(*res);
2226                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2227         }
2228         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2229         return 0;
2230 }
2231
2232 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2233 {
2234         __be32 *p;
2235
2236         *res = 0;
2237         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2238                 return -EIO;
2239         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2240                 READ_BUF(4);
2241                 READ32(*res);
2242                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2243         }
2244         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2245         return 0;
2246 }
2247
2248 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2249 {
2250         __be32 *p;
2251         int ret = 0;
2252
2253         fsid->major = 0;
2254         fsid->minor = 0;
2255         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2256                 return -EIO;
2257         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2258                 READ_BUF(16);
2259                 READ64(fsid->major);
2260                 READ64(fsid->minor);
2261                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2262                 ret = NFS_ATTR_FATTR_FSID;
2263         }
2264         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2265                         (unsigned long long)fsid->major,
2266                         (unsigned long long)fsid->minor);
2267         return ret;
2268 }
2269
2270 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2271 {
2272         __be32 *p;
2273
2274         *res = 60;
2275         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2276                 return -EIO;
2277         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2278                 READ_BUF(4);
2279                 READ32(*res);
2280                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2281         }
2282         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2283         return 0;
2284 }
2285
2286 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2287 {
2288         __be32 *p;
2289
2290         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2291         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2292                 return -EIO;
2293         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2294                 READ_BUF(4);
2295                 READ32(*res);
2296                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2297         }
2298         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2299         return 0;
2300 }
2301
2302 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2303 {
2304         __be32 *p;
2305         int ret = 0;
2306
2307         *fileid = 0;
2308         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2309                 return -EIO;
2310         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2311                 READ_BUF(8);
2312                 READ64(*fileid);
2313                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2314                 ret = NFS_ATTR_FATTR_FILEID;
2315         }
2316         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2317         return ret;
2318 }
2319
2320 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2321 {
2322         __be32 *p;
2323         int ret = 0;
2324
2325         *fileid = 0;
2326         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2327                 return -EIO;
2328         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2329                 READ_BUF(8);
2330                 READ64(*fileid);
2331                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2332                 ret = NFS_ATTR_FATTR_FILEID;
2333         }
2334         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2335         return ret;
2336 }
2337
2338 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2339 {
2340         __be32 *p;
2341         int status = 0;
2342
2343         *res = 0;
2344         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2345                 return -EIO;
2346         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2347                 READ_BUF(8);
2348                 READ64(*res);
2349                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2350         }
2351         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2352         return status;
2353 }
2354
2355 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2356 {
2357         __be32 *p;
2358         int status = 0;
2359
2360         *res = 0;
2361         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2362                 return -EIO;
2363         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2364                 READ_BUF(8);
2365                 READ64(*res);
2366                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2367         }
2368         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2369         return status;
2370 }
2371
2372 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2373 {
2374         __be32 *p;
2375         int status = 0;
2376
2377         *res = 0;
2378         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2379                 return -EIO;
2380         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2381                 READ_BUF(8);
2382                 READ64(*res);
2383                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2384         }
2385         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2386         return status;
2387 }
2388
2389 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2390 {
2391         u32 n;
2392         __be32 *p;
2393         int status = 0;
2394
2395         READ_BUF(4);
2396         READ32(n);
2397         if (n == 0)
2398                 goto root_path;
2399         dprintk("path ");
2400         path->ncomponents = 0;
2401         while (path->ncomponents < n) {
2402                 struct nfs4_string *component = &path->components[path->ncomponents];
2403                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2404                 if (unlikely(status != 0))
2405                         goto out_eio;
2406                 if (path->ncomponents != n)
2407                         dprintk("/");
2408                 dprintk("%s", component->data);
2409                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2410                         path->ncomponents++;
2411                 else {
2412                         dprintk("cannot parse %d components in path\n", n);
2413                         goto out_eio;
2414                 }
2415         }
2416 out:
2417         dprintk("\n");
2418         return status;
2419 root_path:
2420 /* a root pathname is sent as a zero component4 */
2421         path->ncomponents = 1;
2422         path->components[0].len=0;
2423         path->components[0].data=NULL;
2424         dprintk("path /\n");
2425         goto out;
2426 out_eio:
2427         dprintk(" status %d", status);
2428         status = -EIO;
2429         goto out;
2430 }
2431
2432 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2433 {
2434         int n;
2435         __be32 *p;
2436         int status = -EIO;
2437
2438         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2439                 goto out;
2440         status = 0;
2441         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2442                 goto out;
2443         dprintk("%s: fsroot ", __func__);
2444         status = decode_pathname(xdr, &res->fs_path);
2445         if (unlikely(status != 0))
2446                 goto out;
2447         READ_BUF(4);
2448         READ32(n);
2449         if (n <= 0)
2450                 goto out_eio;
2451         res->nlocations = 0;
2452         while (res->nlocations < n) {
2453                 u32 m;
2454                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2455
2456                 READ_BUF(4);
2457                 READ32(m);
2458
2459                 loc->nservers = 0;
2460                 dprintk("%s: servers ", __func__);
2461                 while (loc->nservers < m) {
2462                         struct nfs4_string *server = &loc->servers[loc->nservers];
2463                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2464                         if (unlikely(status != 0))
2465                                 goto out_eio;
2466                         dprintk("%s ", server->data);
2467                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2468                                 loc->nservers++;
2469                         else {
2470                                 unsigned int i;
2471                                 dprintk("%s: using first %u of %u servers "
2472                                         "returned for location %u\n",
2473                                                 __func__,
2474                                                 NFS4_FS_LOCATION_MAXSERVERS,
2475                                                 m, res->nlocations);
2476                                 for (i = loc->nservers; i < m; i++) {
2477                                         unsigned int len;
2478                                         char *data;
2479                                         status = decode_opaque_inline(xdr, &len, &data);
2480                                         if (unlikely(status != 0))
2481                                                 goto out_eio;
2482                                 }
2483                         }
2484                 }
2485                 status = decode_pathname(xdr, &loc->rootpath);
2486                 if (unlikely(status != 0))
2487                         goto out_eio;
2488                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2489                         res->nlocations++;
2490         }
2491         if (res->nlocations != 0)
2492                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2493 out:
2494         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2495         return status;
2496 out_eio:
2497         status = -EIO;
2498         goto out;
2499 }
2500
2501 static int decode_attr_maxfilesize(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_MAXFILESIZE - 1U)))
2508                 return -EIO;
2509         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2510                 READ_BUF(8);
2511                 READ64(*res);
2512                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2513         }
2514         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2515         return status;
2516 }
2517
2518 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2519 {
2520         __be32 *p;
2521         int status = 0;
2522
2523         *maxlink = 1;
2524         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2525                 return -EIO;
2526         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2527                 READ_BUF(4);
2528                 READ32(*maxlink);
2529                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2530         }
2531         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2532         return status;
2533 }
2534
2535 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2536 {
2537         __be32 *p;
2538         int status = 0;
2539
2540         *maxname = 1024;
2541         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2542                 return -EIO;
2543         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2544                 READ_BUF(4);
2545                 READ32(*maxname);
2546                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2547         }
2548         dprintk("%s: maxname=%u\n", __func__, *maxname);
2549         return status;
2550 }
2551
2552 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2553 {
2554         __be32 *p;
2555         int status = 0;
2556
2557         *res = 1024;
2558         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2559                 return -EIO;
2560         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2561                 uint64_t maxread;
2562                 READ_BUF(8);
2563                 READ64(maxread);
2564                 if (maxread > 0x7FFFFFFF)
2565                         maxread = 0x7FFFFFFF;
2566                 *res = (uint32_t)maxread;
2567                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2568         }
2569         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2570         return status;
2571 }
2572
2573 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2574 {
2575         __be32 *p;
2576         int status = 0;
2577
2578         *res = 1024;
2579         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2580                 return -EIO;
2581         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2582                 uint64_t maxwrite;
2583                 READ_BUF(8);
2584                 READ64(maxwrite);
2585                 if (maxwrite > 0x7FFFFFFF)
2586                         maxwrite = 0x7FFFFFFF;
2587                 *res = (uint32_t)maxwrite;
2588                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2589         }
2590         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2591         return status;
2592 }
2593
2594 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2595 {
2596         uint32_t tmp;
2597         __be32 *p;
2598         int ret = 0;
2599
2600         *mode = 0;
2601         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2602                 return -EIO;
2603         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2604                 READ_BUF(4);
2605                 READ32(tmp);
2606                 *mode = tmp & ~S_IFMT;
2607                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2608                 ret = NFS_ATTR_FATTR_MODE;
2609         }
2610         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2611         return ret;
2612 }
2613
2614 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2615 {
2616         __be32 *p;
2617         int ret = 0;
2618
2619         *nlink = 1;
2620         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2621                 return -EIO;
2622         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2623                 READ_BUF(4);
2624                 READ32(*nlink);
2625                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2626                 ret = NFS_ATTR_FATTR_NLINK;
2627         }
2628         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2629         return ret;
2630 }
2631
2632 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2633 {
2634         uint32_t len;
2635         __be32 *p;
2636         int ret = 0;
2637
2638         *uid = -2;
2639         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2640                 return -EIO;
2641         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2642                 READ_BUF(4);
2643                 READ32(len);
2644                 READ_BUF(len);
2645                 if (len < XDR_MAX_NETOBJ) {
2646                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2647                                 ret = NFS_ATTR_FATTR_OWNER;
2648                         else
2649                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2650                                                 __func__);
2651                 } else
2652                         dprintk("%s: name too long (%u)!\n",
2653                                         __func__, len);
2654                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2655         }
2656         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2657         return ret;
2658 }
2659
2660 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2661 {
2662         uint32_t len;
2663         __be32 *p;
2664         int ret = 0;
2665
2666         *gid = -2;
2667         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2668                 return -EIO;
2669         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2670                 READ_BUF(4);
2671                 READ32(len);
2672                 READ_BUF(len);
2673                 if (len < XDR_MAX_NETOBJ) {
2674                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2675                                 ret = NFS_ATTR_FATTR_GROUP;
2676                         else
2677                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2678                                                 __func__);
2679                 } else
2680                         dprintk("%s: name too long (%u)!\n",
2681                                         __func__, len);
2682                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2683         }
2684         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2685         return ret;
2686 }
2687
2688 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2689 {
2690         uint32_t major = 0, minor = 0;
2691         __be32 *p;
2692         int ret = 0;
2693
2694         *rdev = MKDEV(0,0);
2695         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2696                 return -EIO;
2697         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2698                 dev_t tmp;
2699
2700                 READ_BUF(8);
2701                 READ32(major);
2702                 READ32(minor);
2703                 tmp = MKDEV(major, minor);
2704                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2705                         *rdev = tmp;
2706                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2707                 ret = NFS_ATTR_FATTR_RDEV;
2708         }
2709         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2710         return ret;
2711 }
2712
2713 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2714 {
2715         __be32 *p;
2716         int status = 0;
2717
2718         *res = 0;
2719         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2720                 return -EIO;
2721         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2722                 READ_BUF(8);
2723                 READ64(*res);
2724                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2725         }
2726         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2727         return status;
2728 }
2729
2730 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2731 {
2732         __be32 *p;
2733         int status = 0;
2734
2735         *res = 0;
2736         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2737                 return -EIO;
2738         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2739                 READ_BUF(8);
2740                 READ64(*res);
2741                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2742         }
2743         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2744         return status;
2745 }
2746
2747 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2748 {
2749         __be32 *p;
2750         int status = 0;
2751
2752         *res = 0;
2753         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2754                 return -EIO;
2755         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2756                 READ_BUF(8);
2757                 READ64(*res);
2758                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2759         }
2760         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2761         return status;
2762 }
2763
2764 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2765 {
2766         __be32 *p;
2767         int ret = 0;
2768
2769         *used = 0;
2770         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2771                 return -EIO;
2772         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2773                 READ_BUF(8);
2774                 READ64(*used);
2775                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2776                 ret = NFS_ATTR_FATTR_SPACE_USED;
2777         }
2778         dprintk("%s: space used=%Lu\n", __func__,
2779                         (unsigned long long)*used);
2780         return ret;
2781 }
2782
2783 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2784 {
2785         __be32 *p;
2786         uint64_t sec;
2787         uint32_t nsec;
2788
2789         READ_BUF(12);
2790         READ64(sec);
2791         READ32(nsec);
2792         time->tv_sec = (time_t)sec;
2793         time->tv_nsec = (long)nsec;
2794         return 0;
2795 }
2796
2797 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2798 {
2799         int status = 0;
2800
2801         time->tv_sec = 0;
2802         time->tv_nsec = 0;
2803         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2804                 return -EIO;
2805         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2806                 status = decode_attr_time(xdr, time);
2807                 if (status == 0)
2808                         status = NFS_ATTR_FATTR_ATIME;
2809                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2810         }
2811         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2812         return status;
2813 }
2814
2815 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2816 {
2817         int status = 0;
2818
2819         time->tv_sec = 0;
2820         time->tv_nsec = 0;
2821         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2822                 return -EIO;
2823         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2824                 status = decode_attr_time(xdr, time);
2825                 if (status == 0)
2826                         status = NFS_ATTR_FATTR_CTIME;
2827                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2828         }
2829         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2830         return status;
2831 }
2832
2833 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2834 {
2835         int status = 0;
2836
2837         time->tv_sec = 0;
2838         time->tv_nsec = 0;
2839         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2840                 return -EIO;
2841         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2842                 status = decode_attr_time(xdr, time);
2843                 if (status == 0)
2844                         status = NFS_ATTR_FATTR_MTIME;
2845                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2846         }
2847         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2848         return status;
2849 }
2850
2851 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2852 {
2853         unsigned int attrwords = XDR_QUADLEN(attrlen);
2854         unsigned int nwords = xdr->p - savep;
2855
2856         if (unlikely(attrwords != nwords)) {
2857                 dprintk("%s: server returned incorrect attribute length: "
2858                         "%u %c %u\n",
2859                                 __func__,
2860                                 attrwords << 2,
2861                                 (attrwords < nwords) ? '<' : '>',
2862                                 nwords << 2);
2863                 return -EIO;
2864         }
2865         return 0;
2866 }
2867
2868 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2869 {
2870         __be32 *p;
2871
2872         READ_BUF(20);
2873         READ32(cinfo->atomic);
2874         READ64(cinfo->before);
2875         READ64(cinfo->after);
2876         return 0;
2877 }
2878
2879 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2880 {
2881         __be32 *p;
2882         uint32_t supp, acc;
2883         int status;
2884
2885         status = decode_op_hdr(xdr, OP_ACCESS);
2886         if (status)
2887                 return status;
2888         READ_BUF(8);
2889         READ32(supp);
2890         READ32(acc);
2891         access->supported = supp;
2892         access->access = acc;
2893         return 0;
2894 }
2895
2896 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2897 {
2898         __be32 *p;
2899         int status;
2900
2901         status = decode_op_hdr(xdr, OP_CLOSE);
2902         if (status != -EIO)
2903                 nfs_increment_open_seqid(status, res->seqid);
2904         if (status)
2905                 return status;
2906         READ_BUF(NFS4_STATEID_SIZE);
2907         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2908         return 0;
2909 }
2910
2911 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2912 {
2913         __be32 *p;
2914         int status;
2915
2916         status = decode_op_hdr(xdr, OP_COMMIT);
2917         if (status)
2918                 return status;
2919         READ_BUF(8);
2920         COPYMEM(res->verf->verifier, 8);
2921         return 0;
2922 }
2923
2924 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2925 {
2926         __be32 *p;
2927         uint32_t bmlen;
2928         int status;
2929
2930         status = decode_op_hdr(xdr, OP_CREATE);
2931         if (status)
2932                 return status;
2933         if ((status = decode_change_info(xdr, cinfo)))
2934                 return status;
2935         READ_BUF(4);
2936         READ32(bmlen);
2937         READ_BUF(bmlen << 2);
2938         return 0;
2939 }
2940
2941 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2942 {
2943         __be32 *savep;
2944         uint32_t attrlen, bitmap[2] = {0};
2945         int status;
2946
2947         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2948                 goto xdr_error;
2949         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2950                 goto xdr_error;
2951         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2952                 goto xdr_error;
2953         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2954                 goto xdr_error;
2955         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2956                 goto xdr_error;
2957         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2958                 goto xdr_error;
2959         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2960                 goto xdr_error;
2961         status = verify_attr_len(xdr, savep, attrlen);
2962 xdr_error:
2963         dprintk("%s: xdr returned %d!\n", __func__, -status);
2964         return status;
2965 }
2966
2967 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2968 {
2969         __be32 *savep;
2970         uint32_t attrlen, bitmap[2] = {0};
2971         int status;
2972
2973         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2974                 goto xdr_error;
2975         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2976                 goto xdr_error;
2977         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2978                 goto xdr_error;
2979
2980         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2981                 goto xdr_error;
2982         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2983                 goto xdr_error;
2984         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2985                 goto xdr_error;
2986         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2987                 goto xdr_error;
2988         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2989                 goto xdr_error;
2990         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2991                 goto xdr_error;
2992
2993         status = verify_attr_len(xdr, savep, attrlen);
2994 xdr_error:
2995         dprintk("%s: xdr returned %d!\n", __func__, -status);
2996         return status;
2997 }
2998
2999 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3000 {
3001         __be32 *savep;
3002         uint32_t attrlen, bitmap[2] = {0};
3003         int status;
3004
3005         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3006                 goto xdr_error;
3007         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3008                 goto xdr_error;
3009         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3010                 goto xdr_error;
3011
3012         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3013                 goto xdr_error;
3014         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3015                 goto xdr_error;
3016
3017         status = verify_attr_len(xdr, savep, attrlen);
3018 xdr_error:
3019         dprintk("%s: xdr returned %d!\n", __func__, -status);
3020         return status;
3021 }
3022
3023 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3024 {
3025         __be32 *savep;
3026         uint32_t attrlen,
3027                  bitmap[2] = {0},
3028                  type;
3029         int status;
3030         umode_t fmode = 0;
3031         uint64_t fileid;
3032
3033         status = decode_op_hdr(xdr, OP_GETATTR);
3034         if (status < 0)
3035                 goto xdr_error;
3036
3037         status = decode_attr_bitmap(xdr, bitmap);
3038         if (status < 0)
3039                 goto xdr_error;
3040
3041         status = decode_attr_length(xdr, &attrlen, &savep);
3042         if (status < 0)
3043                 goto xdr_error;
3044
3045
3046         status = decode_attr_type(xdr, bitmap, &type);
3047         if (status < 0)
3048                 goto xdr_error;
3049         fattr->mode = 0;
3050         if (status != 0) {
3051                 fattr->mode |= nfs_type2fmt[type];
3052                 fattr->valid |= status;
3053         }
3054
3055         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3056         if (status < 0)
3057                 goto xdr_error;
3058         fattr->valid |= status;
3059
3060         status = decode_attr_size(xdr, bitmap, &fattr->size);
3061         if (status < 0)
3062                 goto xdr_error;
3063         fattr->valid |= status;
3064
3065         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3066         if (status < 0)
3067                 goto xdr_error;
3068         fattr->valid |= status;
3069
3070         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3071         if (status < 0)
3072                 goto xdr_error;
3073         fattr->valid |= status;
3074
3075         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3076                                                 struct nfs4_fs_locations,
3077                                                 fattr));
3078         if (status < 0)
3079                 goto xdr_error;
3080         fattr->valid |= status;
3081
3082         status = decode_attr_mode(xdr, bitmap, &fmode);
3083         if (status < 0)
3084                 goto xdr_error;
3085         if (status != 0) {
3086                 fattr->mode |= fmode;
3087                 fattr->valid |= status;
3088         }
3089
3090         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3091         if (status < 0)
3092                 goto xdr_error;
3093         fattr->valid |= status;
3094
3095         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3096         if (status < 0)
3097                 goto xdr_error;
3098         fattr->valid |= status;
3099
3100         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3101         if (status < 0)
3102                 goto xdr_error;
3103         fattr->valid |= status;
3104
3105         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3106         if (status < 0)
3107                 goto xdr_error;
3108         fattr->valid |= status;
3109
3110         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3111         if (status < 0)
3112                 goto xdr_error;
3113         fattr->valid |= status;
3114
3115         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3116         if (status < 0)
3117                 goto xdr_error;
3118         fattr->valid |= status;
3119
3120         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3121         if (status < 0)
3122                 goto xdr_error;
3123         fattr->valid |= status;
3124
3125         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3126         if (status < 0)
3127                 goto xdr_error;
3128         fattr->valid |= status;
3129
3130         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3131         if (status < 0)
3132                 goto xdr_error;
3133         if (status != 0 && !(fattr->valid & status)) {
3134                 fattr->fileid = fileid;
3135                 fattr->valid |= status;
3136         }
3137
3138         status = verify_attr_len(xdr, savep, attrlen);
3139 xdr_error:
3140         dprintk("%s: xdr returned %d\n", __func__, -status);
3141         return status;
3142 }
3143
3144
3145 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3146 {
3147         __be32 *savep;
3148         uint32_t attrlen, bitmap[2];
3149         int status;
3150
3151         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3152                 goto xdr_error;
3153         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3154                 goto xdr_error;
3155         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3156                 goto xdr_error;
3157
3158         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3159
3160         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3161                 goto xdr_error;
3162         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3163                 goto xdr_error;
3164         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3165                 goto xdr_error;
3166         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3167         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3168                 goto xdr_error;
3169         fsinfo->wtpref = fsinfo->wtmax;
3170
3171         status = verify_attr_len(xdr, savep, attrlen);
3172 xdr_error:
3173         dprintk("%s: xdr returned %d!\n", __func__, -status);
3174         return status;
3175 }
3176
3177 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3178 {
3179         __be32 *p;
3180         uint32_t len;
3181         int status;
3182
3183         /* Zero handle first to allow comparisons */
3184         memset(fh, 0, sizeof(*fh));
3185
3186         status = decode_op_hdr(xdr, OP_GETFH);
3187         if (status)
3188                 return status;
3189
3190         READ_BUF(4);
3191         READ32(len);
3192         if (len > NFS4_FHSIZE)
3193                 return -EIO;
3194         fh->size = len;
3195         READ_BUF(len);
3196         COPYMEM(fh->data, len);
3197         return 0;
3198 }
3199
3200 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3201 {
3202         int status;
3203
3204         status = decode_op_hdr(xdr, OP_LINK);
3205         if (status)
3206                 return status;
3207         return decode_change_info(xdr, cinfo);
3208 }
3209
3210 /*
3211  * We create the owner, so we know a proper owner.id length is 4.
3212  */
3213 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3214 {
3215         uint64_t offset, length, clientid;
3216         __be32 *p;
3217         uint32_t namelen, type;
3218
3219         READ_BUF(32);
3220         READ64(offset);
3221         READ64(length);
3222         READ32(type);
3223         if (fl != NULL) {
3224                 fl->fl_start = (loff_t)offset;
3225                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3226                 if (length == ~(uint64_t)0)
3227                         fl->fl_end = OFFSET_MAX;
3228                 fl->fl_type = F_WRLCK;
3229                 if (type & 1)
3230                         fl->fl_type = F_RDLCK;
3231                 fl->fl_pid = 0;
3232         }
3233         READ64(clientid);
3234         READ32(namelen);
3235         READ_BUF(namelen);
3236         return -NFS4ERR_DENIED;
3237 }
3238
3239 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3240 {
3241         __be32 *p;
3242         int status;
3243
3244         status = decode_op_hdr(xdr, OP_LOCK);
3245         if (status == -EIO)
3246                 goto out;
3247         if (status == 0) {
3248                 READ_BUF(NFS4_STATEID_SIZE);
3249                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3250         } else if (status == -NFS4ERR_DENIED)
3251                 status = decode_lock_denied(xdr, NULL);
3252         if (res->open_seqid != NULL)
3253                 nfs_increment_open_seqid(status, res->open_seqid);
3254         nfs_increment_lock_seqid(status, res->lock_seqid);
3255 out:
3256         return status;
3257 }
3258
3259 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3260 {
3261         int status;
3262         status = decode_op_hdr(xdr, OP_LOCKT);
3263         if (status == -NFS4ERR_DENIED)
3264                 return decode_lock_denied(xdr, res->denied);
3265         return status;
3266 }
3267
3268 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3269 {
3270         __be32 *p;
3271         int status;
3272
3273         status = decode_op_hdr(xdr, OP_LOCKU);
3274         if (status != -EIO)
3275                 nfs_increment_lock_seqid(status, res->seqid);
3276         if (status == 0) {
3277                 READ_BUF(NFS4_STATEID_SIZE);
3278                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3279         }
3280         return status;
3281 }
3282
3283 static int decode_lookup(struct xdr_stream *xdr)
3284 {
3285         return decode_op_hdr(xdr, OP_LOOKUP);
3286 }
3287
3288 /* This is too sick! */
3289 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3290 {
3291         __be32 *p;
3292         uint32_t limit_type, nblocks, blocksize;
3293
3294         READ_BUF(12);
3295         READ32(limit_type);
3296         switch (limit_type) {
3297         case 1:
3298                 READ64(*maxsize);
3299                 break;
3300         case 2:
3301                 READ32(nblocks);
3302                 READ32(blocksize);
3303                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3304         }
3305         return 0;
3306 }
3307
3308 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3309 {
3310         __be32 *p;
3311         uint32_t delegation_type;
3312
3313         READ_BUF(4);
3314         READ32(delegation_type);
3315         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3316                 res->delegation_type = 0;
3317                 return 0;
3318         }
3319         READ_BUF(NFS4_STATEID_SIZE+4);
3320         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3321         READ32(res->do_recall);
3322
3323         switch (delegation_type) {
3324         case NFS4_OPEN_DELEGATE_READ:
3325                 res->delegation_type = FMODE_READ;
3326                 break;
3327         case NFS4_OPEN_DELEGATE_WRITE:
3328                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3329                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3330                                 return -EIO;
3331         }
3332         return decode_ace(xdr, NULL, res->server->nfs_client);
3333 }
3334
3335 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3336 {
3337         __be32 *p;
3338         uint32_t savewords, bmlen, i;
3339         int status;
3340
3341         status = decode_op_hdr(xdr, OP_OPEN);
3342         if (status != -EIO)
3343                 nfs_increment_open_seqid(status, res->seqid);
3344         if (status)
3345                 return status;
3346         READ_BUF(NFS4_STATEID_SIZE);
3347         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3348
3349         decode_change_info(xdr, &res->cinfo);
3350
3351         READ_BUF(8);
3352         READ32(res->rflags);
3353         READ32(bmlen);
3354         if (bmlen > 10)
3355                 goto xdr_error;
3356
3357         READ_BUF(bmlen << 2);
3358         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3359         for (i = 0; i < savewords; ++i)
3360                 READ32(res->attrset[i]);
3361         for (; i < NFS4_BITMAP_SIZE; i++)
3362                 res->attrset[i] = 0;
3363
3364         return decode_delegation(xdr, res);
3365 xdr_error:
3366         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3367         return -EIO;
3368 }
3369
3370 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3371 {
3372         __be32 *p;
3373         int status;
3374
3375         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3376         if (status != -EIO)
3377                 nfs_increment_open_seqid(status, res->seqid);
3378         if (status)
3379                 return status;
3380         READ_BUF(NFS4_STATEID_SIZE);
3381         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3382         return 0;
3383 }
3384
3385 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3386 {
3387         __be32 *p;
3388         int status;
3389
3390         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3391         if (status != -EIO)
3392                 nfs_increment_open_seqid(status, res->seqid);
3393         if (status)
3394                 return status;
3395         READ_BUF(NFS4_STATEID_SIZE);
3396         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3397         return 0;
3398 }
3399
3400 static int decode_putfh(struct xdr_stream *xdr)
3401 {
3402         return decode_op_hdr(xdr, OP_PUTFH);
3403 }
3404
3405 static int decode_putrootfh(struct xdr_stream *xdr)
3406 {
3407         return decode_op_hdr(xdr, OP_PUTROOTFH);
3408 }
3409
3410 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3411 {
3412         struct kvec *iov = req->rq_rcv_buf.head;
3413         __be32 *p;
3414         uint32_t count, eof, recvd, hdrlen;
3415         int status;
3416
3417         status = decode_op_hdr(xdr, OP_READ);
3418         if (status)
3419                 return status;
3420         READ_BUF(8);
3421         READ32(eof);
3422         READ32(count);
3423         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3424         recvd = req->rq_rcv_buf.len - hdrlen;
3425         if (count > recvd) {
3426                 dprintk("NFS: server cheating in read reply: "
3427                                 "count %u > recvd %u\n", count, recvd);
3428                 count = recvd;
3429                 eof = 0;
3430         }
3431         xdr_read_pages(xdr, count);
3432         res->eof = eof;
3433         res->count = count;
3434         return 0;
3435 }
3436
3437 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3438 {
3439         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3440         struct page     *page = *rcvbuf->pages;
3441         struct kvec     *iov = rcvbuf->head;
3442         size_t          hdrlen;
3443         u32             recvd, pglen = rcvbuf->page_len;
3444         __be32          *end, *entry, *p, *kaddr;
3445         unsigned int    nr = 0;
3446         int             status;
3447
3448         status = decode_op_hdr(xdr, OP_READDIR);
3449         if (status)
3450                 return status;
3451         READ_BUF(8);
3452         COPYMEM(readdir->verifier.data, 8);
3453         dprintk("%s: verifier = %08x:%08x\n",
3454                         __func__,
3455                         ((u32 *)readdir->verifier.data)[0],
3456                         ((u32 *)readdir->verifier.data)[1]);
3457
3458
3459         hdrlen = (char *) p - (char *) iov->iov_base;
3460         recvd = rcvbuf->len - hdrlen;
3461         if (pglen > recvd)
3462                 pglen = recvd;
3463         xdr_read_pages(xdr, pglen);
3464
3465         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3466         kaddr = p = kmap_atomic(page, KM_USER0);
3467         end = p + ((pglen + readdir->pgbase) >> 2);
3468         entry = p;
3469
3470         /* Make sure the packet actually has a value_follows and EOF entry */
3471         if ((entry + 1) > end)
3472                 goto short_pkt;
3473
3474         for (; *p++; nr++) {
3475                 u32 len, attrlen, xlen;
3476                 if (end - p < 3)
3477                         goto short_pkt;
3478                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3479                 p += 2;                 /* cookie */
3480                 len = ntohl(*p++);      /* filename length */
3481                 if (len > NFS4_MAXNAMLEN) {
3482                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3483                                         len);
3484                         goto err_unmap;
3485                 }
3486                 xlen = XDR_QUADLEN(len);
3487                 if (end - p < xlen + 1)
3488                         goto short_pkt;
3489                 dprintk("filename = %*s\n", len, (char *)p);
3490                 p += xlen;
3491                 len = ntohl(*p++);      /* bitmap length */
3492                 if (end - p < len + 1)
3493                         goto short_pkt;
3494                 p += len;
3495                 attrlen = XDR_QUADLEN(ntohl(*p++));
3496                 if (end - p < attrlen + 2)
3497                         goto short_pkt;
3498                 p += attrlen;           /* attributes */
3499                 entry = p;
3500         }
3501         /*
3502          * Apparently some server sends responses that are a valid size, but
3503          * contain no entries, and have value_follows==0 and EOF==0. For
3504          * those, just set the EOF marker.
3505          */
3506         if (!nr && entry[1] == 0) {
3507                 dprintk("NFS: readdir reply truncated!\n");
3508                 entry[1] = 1;
3509         }
3510 out:
3511         kunmap_atomic(kaddr, KM_USER0);
3512         return 0;
3513 short_pkt:
3514         /*
3515          * When we get a short packet there are 2 possibilities. We can
3516          * return an error, or fix up the response to look like a valid
3517          * response and return what we have so far. If there are no
3518          * entries and the packet was short, then return -EIO. If there
3519          * are valid entries in the response, return them and pretend that
3520          * the call was successful, but incomplete. The caller can retry the
3521          * readdir starting at the last cookie.
3522          */
3523         dprintk("%s: short packet at entry %d\n", __func__, nr);
3524         entry[0] = entry[1] = 0;
3525         if (nr)
3526                 goto out;
3527 err_unmap:
3528         kunmap_atomic(kaddr, KM_USER0);
3529         return -errno_NFSERR_IO;
3530 }
3531
3532 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3533 {
3534         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3535         struct kvec *iov = rcvbuf->head;
3536         size_t hdrlen;
3537         u32 len, recvd;
3538         __be32 *p;
3539         char *kaddr;
3540         int status;
3541
3542         status = decode_op_hdr(xdr, OP_READLINK);
3543         if (status)
3544                 return status;
3545
3546         /* Convert length of symlink */
3547         READ_BUF(4);
3548         READ32(len);
3549         if (len >= rcvbuf->page_len || len <= 0) {
3550                 dprintk("nfs: server returned giant symlink!\n");
3551                 return -ENAMETOOLONG;
3552         }
3553         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3554         recvd = req->rq_rcv_buf.len - hdrlen;
3555         if (recvd < len) {
3556                 dprintk("NFS: server cheating in readlink reply: "
3557                                 "count %u > recvd %u\n", len, recvd);
3558                 return -EIO;
3559         }
3560         xdr_read_pages(xdr, len);
3561         /*
3562          * The XDR encode routine has set things up so that
3563          * the link text will be copied directly into the
3564          * buffer.  We just have to do overflow-checking,
3565          * and and null-terminate the text (the VFS expects
3566          * null-termination).
3567          */
3568         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3569         kaddr[len+rcvbuf->page_base] = '\0';
3570         kunmap_atomic(kaddr, KM_USER0);
3571         return 0;
3572 }
3573
3574 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3575 {
3576         int status;
3577
3578         status = decode_op_hdr(xdr, OP_REMOVE);
3579         if (status)
3580                 goto out;
3581         status = decode_change_info(xdr, cinfo);
3582 out:
3583         return status;
3584 }
3585
3586 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3587               struct nfs4_change_info *new_cinfo)
3588 {
3589         int status;
3590
3591         status = decode_op_hdr(xdr, OP_RENAME);
3592         if (status)
3593                 goto out;
3594         if ((status = decode_change_info(xdr, old_cinfo)))
3595                 goto out;
3596         status = decode_change_info(xdr, new_cinfo);
3597 out:
3598         return status;
3599 }
3600
3601 static int decode_renew(struct xdr_stream *xdr)
3602 {
3603         return decode_op_hdr(xdr, OP_RENEW);
3604 }
3605
3606 static int
3607 decode_restorefh(struct xdr_stream *xdr)
3608 {
3609         return decode_op_hdr(xdr, OP_RESTOREFH);
3610 }
3611
3612 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3613                 size_t *acl_len)
3614 {
3615         __be32 *savep;
3616         uint32_t attrlen,
3617                  bitmap[2] = {0};
3618         struct kvec *iov = req->rq_rcv_buf.head;
3619         int status;
3620
3621         *acl_len = 0;
3622         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3623                 goto out;
3624         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3625                 goto out;
3626         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3627                 goto out;
3628
3629         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3630                 return -EIO;
3631         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3632                 size_t hdrlen;
3633                 u32 recvd;
3634
3635                 /* We ignore &savep and don't do consistency checks on
3636                  * the attr length.  Let userspace figure it out.... */
3637                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3638                 recvd = req->rq_rcv_buf.len - hdrlen;
3639                 if (attrlen > recvd) {
3640                         dprintk("NFS: server cheating in getattr"
3641                                         " acl reply: attrlen %u > recvd %u\n",
3642                                         attrlen, recvd);
3643                         return -EINVAL;
3644                 }
3645                 xdr_read_pages(xdr, attrlen);
3646                 *acl_len = attrlen;
3647         } else
3648                 status = -EOPNOTSUPP;
3649
3650 out:
3651         return status;
3652 }
3653
3654 static int
3655 decode_savefh(struct xdr_stream *xdr)
3656 {
3657         return decode_op_hdr(xdr, OP_SAVEFH);
3658 }
3659
3660 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3661 {
3662         __be32 *p;
3663         uint32_t bmlen;
3664         int status;
3665
3666         status = decode_op_hdr(xdr, OP_SETATTR);
3667         if (status)
3668                 return status;
3669         READ_BUF(4);
3670         READ32(bmlen);
3671         READ_BUF(bmlen << 2);
3672         return 0;
3673 }
3674
3675 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3676 {
3677         __be32 *p;
3678         uint32_t opnum;
3679         int32_t nfserr;
3680
3681         READ_BUF(8);
3682         READ32(opnum);
3683         if (opnum != OP_SETCLIENTID) {
3684                 dprintk("nfs: decode_setclientid: Server returned operation"
3685                         " %d\n", opnum);
3686                 return -EIO;
3687         }
3688         READ32(nfserr);
3689         if (nfserr == NFS_OK) {
3690                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3691                 READ64(clp->cl_clientid);
3692                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3693         } else if (nfserr == NFSERR_CLID_INUSE) {
3694                 uint32_t len;
3695
3696                 /* skip netid string */
3697                 READ_BUF(4);
3698                 READ32(len);
3699                 READ_BUF(len);
3700
3701                 /* skip uaddr string */
3702                 READ_BUF(4);
3703                 READ32(len);
3704                 READ_BUF(len);
3705                 return -NFSERR_CLID_INUSE;
3706         } else
3707                 return nfs4_stat_to_errno(nfserr);
3708
3709         return 0;
3710 }
3711
3712 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3713 {
3714         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3715 }
3716
3717 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3718 {
3719         __be32 *p;
3720         int status;
3721
3722         status = decode_op_hdr(xdr, OP_WRITE);
3723         if (status)
3724                 return status;
3725
3726         READ_BUF(16);
3727         READ32(res->count);
3728         READ32(res->verf->committed);
3729         COPYMEM(res->verf->verifier, 8);
3730         return 0;
3731 }
3732
3733 static int decode_delegreturn(struct xdr_stream *xdr)
3734 {
3735         return decode_op_hdr(xdr, OP_DELEGRETURN);
3736 }
3737
3738 /*
3739  * END OF "GENERIC" DECODE ROUTINES.
3740  */
3741
3742 /*
3743  * Decode OPEN_DOWNGRADE response
3744  */
3745 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3746 {
3747         struct xdr_stream xdr;
3748         struct compound_hdr hdr;
3749         int status;
3750
3751         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3752         status = decode_compound_hdr(&xdr, &hdr);
3753         if (status)
3754                 goto out;
3755         status = decode_putfh(&xdr);
3756         if (status)
3757                 goto out;
3758         status = decode_open_downgrade(&xdr, res);
3759         if (status != 0)
3760                 goto out;
3761         decode_getfattr(&xdr, res->fattr, res->server);
3762 out:
3763         return status;
3764 }
3765
3766 /*
3767  * Decode ACCESS response
3768  */
3769 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3770 {
3771         struct xdr_stream xdr;
3772         struct compound_hdr hdr;
3773         int status;
3774
3775         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3776         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3777                 goto out;
3778         status = decode_putfh(&xdr);
3779         if (status != 0)
3780                 goto out;
3781         status = decode_access(&xdr, res);
3782         if (status != 0)
3783                 goto out;
3784         decode_getfattr(&xdr, res->fattr, res->server);
3785 out:
3786         return status;
3787 }
3788
3789 /*
3790  * Decode LOOKUP response
3791  */
3792 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3793 {
3794         struct xdr_stream xdr;
3795         struct compound_hdr hdr;
3796         int status;
3797
3798         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3799         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3800                 goto out;
3801         if ((status = decode_putfh(&xdr)) != 0)
3802                 goto out;
3803         if ((status = decode_lookup(&xdr)) != 0)
3804                 goto out;
3805         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3806                 goto out;
3807         status = decode_getfattr(&xdr, res->fattr, res->server);
3808 out:
3809         return status;
3810 }
3811
3812 /*
3813  * Decode LOOKUP_ROOT response
3814  */
3815 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3816 {
3817         struct xdr_stream xdr;
3818         struct compound_hdr hdr;
3819         int status;
3820
3821         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3822         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3823                 goto out;
3824         if ((status = decode_putrootfh(&xdr)) != 0)
3825                 goto out;
3826         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3827                 status = decode_getfattr(&xdr, res->fattr, res->server);
3828 out:
3829         return status;
3830 }
3831
3832 /*
3833  * Decode REMOVE response
3834  */
3835 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3836 {
3837         struct xdr_stream xdr;
3838         struct compound_hdr hdr;
3839         int status;
3840
3841         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3842         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3843                 goto out;
3844         if ((status = decode_putfh(&xdr)) != 0)
3845                 goto out;
3846         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3847                 goto out;
3848         decode_getfattr(&xdr, &res->dir_attr, res->server);
3849 out:
3850         return status;
3851 }
3852
3853 /*
3854  * Decode RENAME response
3855  */
3856 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3857 {
3858         struct xdr_stream xdr;
3859         struct compound_hdr hdr;
3860         int status;
3861
3862         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3863         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3864                 goto out;
3865         if ((status = decode_putfh(&xdr)) != 0)
3866                 goto out;
3867         if ((status = decode_savefh(&xdr)) != 0)
3868                 goto out;
3869         if ((status = decode_putfh(&xdr)) != 0)
3870                 goto out;
3871         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3872                 goto out;
3873         /* Current FH is target directory */
3874         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3875                 goto out;
3876         if ((status = decode_restorefh(&xdr)) != 0)
3877                 goto out;
3878         decode_getfattr(&xdr, res->old_fattr, res->server);
3879 out:
3880         return status;
3881 }
3882
3883 /*
3884  * Decode LINK response
3885  */
3886 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3887 {
3888         struct xdr_stream xdr;
3889         struct compound_hdr hdr;
3890         int status;
3891
3892         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3893         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3894                 goto out;
3895         if ((status = decode_putfh(&xdr)) != 0)
3896                 goto out;
3897         if ((status = decode_savefh(&xdr)) != 0)
3898                 goto out;
3899         if ((status = decode_putfh(&xdr)) != 0)
3900                 goto out;
3901         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3902                 goto out;
3903         /*
3904          * Note order: OP_LINK leaves the directory as the current
3905          *             filehandle.
3906          */
3907         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3908                 goto out;
3909         if ((status = decode_restorefh(&xdr)) != 0)
3910                 goto out;
3911         decode_getfattr(&xdr, res->fattr, res->server);
3912 out:
3913         return status;
3914 }
3915
3916 /*
3917  * Decode CREATE response
3918  */
3919 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3920 {
3921         struct xdr_stream xdr;
3922         struct compound_hdr hdr;
3923         int status;
3924
3925         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3926         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3927                 goto out;
3928         if ((status = decode_putfh(&xdr)) != 0)
3929                 goto out;
3930         if ((status = decode_savefh(&xdr)) != 0)
3931                 goto out;
3932         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3933                 goto out;
3934         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3935                 goto out;
3936         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3937                 goto out;
3938         if ((status = decode_restorefh(&xdr)) != 0)
3939                 goto out;
3940         decode_getfattr(&xdr, res->dir_fattr, res->server);
3941 out:
3942         return status;
3943 }
3944
3945 /*
3946  * Decode SYMLINK response
3947  */
3948 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3949 {
3950         return nfs4_xdr_dec_create(rqstp, p, res);
3951 }
3952
3953 /*
3954  * Decode GETATTR response
3955  */
3956 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3957 {
3958         struct xdr_stream xdr;
3959         struct compound_hdr hdr;
3960         int status;
3961
3962         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3963         status = decode_compound_hdr(&xdr, &hdr);
3964         if (status)
3965                 goto out;
3966         status = decode_putfh(&xdr);
3967         if (status)
3968                 goto out;
3969         status = decode_getfattr(&xdr, res->fattr, res->server);
3970 out:
3971         return status;
3972 }
3973
3974 /*
3975  * Encode an SETACL request
3976  */
3977 static int
3978 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3979 {
3980         struct xdr_stream xdr;
3981         struct compound_hdr hdr = {
3982                 .nops   = 0,
3983         };
3984         int status;
3985
3986         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3987         encode_compound_hdr(&xdr, &hdr);
3988         encode_putfh(&xdr, args->fh, &hdr);
3989         status = encode_setacl(&xdr, args, &hdr);
3990         encode_nops(&hdr);
3991         return status;
3992 }
3993
3994 /*
3995  * Decode SETACL response
3996  */
3997 static int
3998 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3999 {
4000         struct xdr_stream xdr;
4001         struct compound_hdr hdr;
4002         int status;
4003
4004         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4005         status = decode_compound_hdr(&xdr, &hdr);
4006         if (status)
4007                 goto out;
4008         status = decode_putfh(&xdr);
4009         if (status)
4010                 goto out;
4011         status = decode_setattr(&xdr, res);
4012 out:
4013         return status;
4014 }
4015
4016 /*
4017  * Decode GETACL response
4018  */
4019 static int
4020 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4021 {
4022         struct xdr_stream xdr;
4023         struct compound_hdr hdr;
4024         int status;
4025
4026         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4027         status = decode_compound_hdr(&xdr, &hdr);
4028         if (status)
4029                 goto out;
4030         status = decode_putfh(&xdr);
4031         if (status)
4032                 goto out;
4033         status = decode_getacl(&xdr, rqstp, acl_len);
4034
4035 out:
4036         return status;
4037 }
4038
4039 /*
4040  * Decode CLOSE response
4041  */
4042 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4043 {
4044         struct xdr_stream xdr;
4045         struct compound_hdr hdr;
4046         int status;
4047
4048         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4049         status = decode_compound_hdr(&xdr, &hdr);
4050         if (status)
4051                 goto out;
4052         status = decode_putfh(&xdr);
4053         if (status)
4054                 goto out;
4055         status = decode_close(&xdr, res);
4056         if (status != 0)
4057                 goto out;
4058         /*
4059          * Note: Server may do delete on close for this file
4060          *      in which case the getattr call will fail with
4061          *      an ESTALE error. Shouldn't be a problem,
4062          *      though, since fattr->valid will remain unset.
4063          */
4064         decode_getfattr(&xdr, res->fattr, res->server);
4065 out:
4066         return status;
4067 }
4068
4069 /*
4070  * Decode OPEN response
4071  */
4072 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4073 {
4074         struct xdr_stream xdr;
4075         struct compound_hdr hdr;
4076         int status;
4077
4078         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4079         status = decode_compound_hdr(&xdr, &hdr);
4080         if (status)
4081                 goto out;
4082         status = decode_putfh(&xdr);
4083         if (status)
4084                 goto out;
4085         status = decode_savefh(&xdr);
4086         if (status)
4087                 goto out;
4088         status = decode_open(&xdr, res);
4089         if (status)
4090                 goto out;
4091         if (decode_getfh(&xdr, &res->fh) != 0)
4092                 goto out;
4093         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4094                 goto out;
4095         if (decode_restorefh(&xdr) != 0)
4096                 goto out;
4097         decode_getfattr(&xdr, res->dir_attr, res->server);
4098 out:
4099         return status;
4100 }
4101
4102 /*
4103  * Decode OPEN_CONFIRM response
4104  */
4105 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4106 {
4107         struct xdr_stream xdr;
4108         struct compound_hdr hdr;
4109         int status;
4110
4111         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4112         status = decode_compound_hdr(&xdr, &hdr);
4113         if (status)
4114                 goto out;
4115         status = decode_putfh(&xdr);
4116         if (status)
4117                 goto out;
4118         status = decode_open_confirm(&xdr, res);
4119 out:
4120         return status;
4121 }
4122
4123 /*
4124  * Decode OPEN response
4125  */
4126 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4127 {
4128         struct xdr_stream xdr;
4129         struct compound_hdr hdr;
4130         int status;
4131
4132         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4133         status = decode_compound_hdr(&xdr, &hdr);
4134         if (status)
4135                 goto out;
4136         status = decode_putfh(&xdr);
4137         if (status)
4138                 goto out;
4139         status = decode_open(&xdr, res);
4140         if (status)
4141                 goto out;
4142         decode_getfattr(&xdr, res->f_attr, res->server);
4143 out:
4144         return status;
4145 }
4146
4147 /*
4148  * Decode SETATTR response
4149  */
4150 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4151 {
4152         struct xdr_stream xdr;
4153         struct compound_hdr hdr;
4154         int status;
4155
4156         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4157         status = decode_compound_hdr(&xdr, &hdr);
4158         if (status)
4159                 goto out;
4160         status = decode_putfh(&xdr);
4161         if (status)
4162                 goto out;
4163         status = decode_setattr(&xdr, res);
4164         if (status)
4165                 goto out;
4166         decode_getfattr(&xdr, res->fattr, res->server);
4167 out:
4168         return status;
4169 }
4170
4171 /*
4172  * Decode LOCK response
4173  */
4174 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4175 {
4176         struct xdr_stream xdr;
4177         struct compound_hdr hdr;
4178         int status;
4179
4180         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4181         status = decode_compound_hdr(&xdr, &hdr);
4182         if (status)
4183                 goto out;
4184         status = decode_putfh(&xdr);
4185         if (status)
4186                 goto out;
4187         status = decode_lock(&xdr, res);
4188 out:
4189         return status;
4190 }
4191
4192 /*
4193  * Decode LOCKT response
4194  */
4195 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4196 {
4197         struct xdr_stream xdr;
4198         struct compound_hdr hdr;
4199         int status;
4200
4201         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4202         status = decode_compound_hdr(&xdr, &hdr);
4203         if (status)
4204                 goto out;
4205         status = decode_putfh(&xdr);
4206         if (status)
4207                 goto out;
4208         status = decode_lockt(&xdr, res);
4209 out:
4210         return status;
4211 }
4212
4213 /*
4214  * Decode LOCKU response
4215  */
4216 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4217 {
4218         struct xdr_stream xdr;
4219         struct compound_hdr hdr;
4220         int status;
4221
4222         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4223         status = decode_compound_hdr(&xdr, &hdr);
4224         if (status)
4225                 goto out;
4226         status = decode_putfh(&xdr);
4227         if (status)
4228                 goto out;
4229         status = decode_locku(&xdr, res);
4230 out:
4231         return status;
4232 }
4233
4234 /*
4235  * Decode READLINK response
4236  */
4237 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4238 {
4239         struct xdr_stream xdr;
4240         struct compound_hdr hdr;
4241         int status;
4242
4243         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4244         status = decode_compound_hdr(&xdr, &hdr);
4245         if (status)
4246                 goto out;
4247         status = decode_putfh(&xdr);
4248         if (status)
4249                 goto out;
4250         status = decode_readlink(&xdr, rqstp);
4251 out:
4252         return status;
4253 }
4254
4255 /*
4256  * Decode READDIR response
4257  */
4258 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4259 {
4260         struct xdr_stream xdr;
4261         struct compound_hdr hdr;
4262         int status;
4263
4264         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4265         status = decode_compound_hdr(&xdr, &hdr);
4266         if (status)
4267                 goto out;
4268         status = decode_putfh(&xdr);
4269         if (status)
4270                 goto out;
4271         status = decode_readdir(&xdr, rqstp, res);
4272 out:
4273         return status;
4274 }
4275
4276 /*
4277  * Decode Read response
4278  */
4279 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4280 {
4281         struct xdr_stream xdr;
4282         struct compound_hdr hdr;
4283         int status;
4284
4285         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4286         status = decode_compound_hdr(&xdr, &hdr);
4287         if (status)
4288                 goto out;
4289         status = decode_putfh(&xdr);
4290         if (status)
4291                 goto out;
4292         status = decode_read(&xdr, rqstp, res);
4293         if (!status)
4294                 status = res->count;
4295 out:
4296         return status;
4297 }
4298
4299 /*
4300  * Decode WRITE response
4301  */
4302 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4303 {
4304         struct xdr_stream xdr;
4305         struct compound_hdr hdr;
4306         int status;
4307
4308         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4309         status = decode_compound_hdr(&xdr, &hdr);
4310         if (status)
4311                 goto out;
4312         status = decode_putfh(&xdr);
4313         if (status)
4314                 goto out;
4315         status = decode_write(&xdr, res);
4316         if (status)
4317                 goto out;
4318         decode_getfattr(&xdr, res->fattr, res->server);
4319         if (!status)
4320                 status = res->count;
4321 out:
4322         return status;
4323 }
4324
4325 /*
4326  * Decode COMMIT response
4327  */
4328 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4329 {
4330         struct xdr_stream xdr;
4331         struct compound_hdr hdr;
4332         int status;
4333
4334         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4335         status = decode_compound_hdr(&xdr, &hdr);
4336         if (status)
4337                 goto out;
4338         status = decode_putfh(&xdr);
4339         if (status)
4340                 goto out;
4341         status = decode_commit(&xdr, res);
4342         if (status)
4343                 goto out;
4344         decode_getfattr(&xdr, res->fattr, res->server);
4345 out:
4346         return status;
4347 }
4348
4349 /*
4350  * FSINFO request
4351  */
4352 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4353 {
4354         struct xdr_stream xdr;
4355         struct compound_hdr hdr;
4356         int status;
4357
4358         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4359         status = decode_compound_hdr(&xdr, &hdr);
4360         if (!status)
4361                 status = decode_putfh(&xdr);
4362         if (!status)
4363                 status = decode_fsinfo(&xdr, fsinfo);
4364         return status;
4365 }
4366
4367 /*
4368  * PATHCONF request
4369  */
4370 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4371 {
4372         struct xdr_stream xdr;
4373         struct compound_hdr hdr;
4374         int status;
4375
4376         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4377         status = decode_compound_hdr(&xdr, &hdr);
4378         if (!status)
4379                 status = decode_putfh(&xdr);
4380         if (!status)
4381                 status = decode_pathconf(&xdr, pathconf);
4382         return status;
4383 }
4384
4385 /*
4386  * STATFS request
4387  */
4388 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4389 {
4390         struct xdr_stream xdr;
4391         struct compound_hdr hdr;
4392         int status;
4393
4394         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4395         status = decode_compound_hdr(&xdr, &hdr);
4396         if (!status)
4397                 status = decode_putfh(&xdr);
4398         if (!status)
4399                 status = decode_statfs(&xdr, fsstat);
4400         return status;
4401 }
4402
4403 /*
4404  * GETATTR_BITMAP request
4405  */
4406 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4407 {
4408         struct xdr_stream xdr;
4409         struct compound_hdr hdr;
4410         int status;
4411
4412         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4413         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4414                 goto out;
4415         if ((status = decode_putfh(&xdr)) != 0)
4416                 goto out;
4417         status = decode_server_caps(&xdr, res);
4418 out:
4419         return status;
4420 }
4421
4422 /*
4423  * Decode RENEW response
4424  */
4425 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4426 {
4427         struct xdr_stream xdr;
4428         struct compound_hdr hdr;
4429         int status;
4430
4431         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4432         status = decode_compound_hdr(&xdr, &hdr);
4433         if (!status)
4434                 status = decode_renew(&xdr);
4435         return status;
4436 }
4437
4438 /*
4439  * a SETCLIENTID request
4440  */
4441 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4442                 struct nfs_client *clp)
4443 {
4444         struct xdr_stream xdr;
4445         struct compound_hdr hdr;
4446         int status;
4447
4448         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4449         status = decode_compound_hdr(&xdr, &hdr);
4450         if (!status)
4451                 status = decode_setclientid(&xdr, clp);
4452         return status;
4453 }
4454
4455 /*
4456  * a SETCLIENTID_CONFIRM request
4457  */
4458 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4459 {
4460         struct xdr_stream xdr;
4461         struct compound_hdr hdr;
4462         int status;
4463
4464         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4465         status = decode_compound_hdr(&xdr, &hdr);
4466         if (!status)
4467                 status = decode_setclientid_confirm(&xdr);
4468         if (!status)
4469                 status = decode_putrootfh(&xdr);
4470         if (!status)
4471                 status = decode_fsinfo(&xdr, fsinfo);
4472         return status;
4473 }
4474
4475 /*
4476  * DELEGRETURN request
4477  */
4478 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4479 {
4480         struct xdr_stream xdr;
4481         struct compound_hdr hdr;
4482         int status;
4483
4484         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4485         status = decode_compound_hdr(&xdr, &hdr);
4486         if (status != 0)
4487                 goto out;
4488         status = decode_putfh(&xdr);
4489         if (status != 0)
4490                 goto out;
4491         status = decode_delegreturn(&xdr);
4492         decode_getfattr(&xdr, res->fattr, res->server);
4493 out:
4494         return status;
4495 }
4496
4497 /*
4498  * FS_LOCATIONS request
4499  */
4500 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4501 {
4502         struct xdr_stream xdr;
4503         struct compound_hdr hdr;
4504         int status;
4505
4506         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4507         status = decode_compound_hdr(&xdr, &hdr);
4508         if (status != 0)
4509                 goto out;
4510         if ((status = decode_putfh(&xdr)) != 0)
4511                 goto out;
4512         if ((status = decode_lookup(&xdr)) != 0)
4513                 goto out;
4514         xdr_enter_page(&xdr, PAGE_SIZE);
4515         status = decode_getfattr(&xdr, &res->fattr, res->server);
4516 out:
4517         return status;
4518 }
4519
4520 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4521 {
4522         uint32_t bitmap[2] = {0};
4523         uint32_t len;
4524
4525         if (!*p++) {
4526                 if (!*p)
4527                         return ERR_PTR(-EAGAIN);
4528                 entry->eof = 1;
4529                 return ERR_PTR(-EBADCOOKIE);
4530         }
4531
4532         entry->prev_cookie = entry->cookie;
4533         p = xdr_decode_hyper(p, &entry->cookie);
4534         entry->len = ntohl(*p++);
4535         entry->name = (const char *) p;
4536         p += XDR_QUADLEN(entry->len);
4537
4538         /*
4539          * In case the server doesn't return an inode number,
4540          * we fake one here.  (We don't use inode number 0,
4541          * since glibc seems to choke on it...)
4542          */
4543         entry->ino = 1;
4544
4545         len = ntohl(*p++);              /* bitmap length */
4546         if (len-- > 0) {
4547                 bitmap[0] = ntohl(*p++);
4548                 if (len-- > 0) {
4549                         bitmap[1] = ntohl(*p++);
4550                         p += len;
4551                 }
4552         }
4553         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4554         if (len > 0) {
4555                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4556                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4557                         /* Ignore the return value of rdattr_error for now */
4558                         p++;
4559                         len--;
4560                 }
4561                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4562                         xdr_decode_hyper(p, &entry->ino);
4563                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4564                         xdr_decode_hyper(p, &entry->ino);
4565                 p += len;
4566         }
4567
4568         entry->eof = !p[0] && p[1];
4569         return p;
4570 }
4571
4572 /*
4573  * We need to translate between nfs status return values and
4574  * the local errno values which may not be the same.
4575  */
4576 static struct {
4577         int stat;
4578         int errno;
4579 } nfs_errtbl[] = {
4580         { NFS4_OK,              0               },
4581         { NFS4ERR_PERM,         -EPERM          },
4582         { NFS4ERR_NOENT,        -ENOENT         },
4583         { NFS4ERR_IO,           -errno_NFSERR_IO},
4584         { NFS4ERR_NXIO,         -ENXIO          },
4585         { NFS4ERR_ACCESS,       -EACCES         },
4586         { NFS4ERR_EXIST,        -EEXIST         },
4587         { NFS4ERR_XDEV,         -EXDEV          },
4588         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4589         { NFS4ERR_ISDIR,        -EISDIR         },
4590         { NFS4ERR_INVAL,        -EINVAL         },
4591         { NFS4ERR_FBIG,         -EFBIG          },
4592         { NFS4ERR_NOSPC,        -ENOSPC         },
4593         { NFS4ERR_ROFS,         -EROFS          },
4594         { NFS4ERR_MLINK,        -EMLINK         },
4595         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4596         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4597         { NFS4ERR_DQUOT,        -EDQUOT         },
4598         { NFS4ERR_STALE,        -ESTALE         },
4599         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4600         { NFS4ERR_BADOWNER,     -EINVAL         },
4601         { NFS4ERR_BADNAME,      -EINVAL         },
4602         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4603         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4604         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4605         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4606         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4607         { NFS4ERR_LOCKED,       -EAGAIN         },
4608         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4609         { NFS4ERR_SYMLINK,      -ELOOP          },
4610         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4611         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4612         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4613                                                     * to be handled by a
4614                                                     * middle-layer.
4615                                                     */
4616         { -1,                   -EIO            }
4617 };
4618
4619 /*
4620  * Convert an NFS error code to a local one.
4621  * This one is used jointly by NFSv2 and NFSv3.
4622  */
4623 static int
4624 nfs4_stat_to_errno(int stat)
4625 {
4626         int i;
4627         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4628                 if (nfs_errtbl[i].stat == stat)
4629                         return nfs_errtbl[i].errno;
4630         }
4631         if (stat <= 10000 || stat > 10100) {
4632                 /* The server is looney tunes. */
4633                 return -ESERVERFAULT;
4634         }
4635         /* If we cannot translate the error, the recovery routines should
4636          * handle it.
4637          * Note: remaining NFSv4 error codes have values > 10000, so should
4638          * not conflict with native Linux error codes.
4639          */
4640         return -stat;
4641 }
4642
4643 #define PROC(proc, argtype, restype)                            \
4644 [NFSPROC4_CLNT_##proc] = {                                      \
4645         .p_proc   = NFSPROC4_COMPOUND,                          \
4646         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4647         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4648         .p_arglen = NFS4_##argtype##_sz,                        \
4649         .p_replen = NFS4_##restype##_sz,                        \
4650         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4651         .p_name   = #proc,                                      \
4652 }
4653
4654 struct rpc_procinfo     nfs4_procedures[] = {
4655   PROC(READ,            enc_read,       dec_read),
4656   PROC(WRITE,           enc_write,      dec_write),
4657   PROC(COMMIT,          enc_commit,     dec_commit),
4658   PROC(OPEN,            enc_open,       dec_open),
4659   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4660   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4661   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4662   PROC(CLOSE,           enc_close,      dec_close),
4663   PROC(SETATTR,         enc_setattr,    dec_setattr),
4664   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4665   PROC(RENEW,           enc_renew,      dec_renew),
4666   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4667   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4668   PROC(LOCK,            enc_lock,       dec_lock),
4669   PROC(LOCKT,           enc_lockt,      dec_lockt),
4670   PROC(LOCKU,           enc_locku,      dec_locku),
4671   PROC(ACCESS,          enc_access,     dec_access),
4672   PROC(GETATTR,         enc_getattr,    dec_getattr),
4673   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4674   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4675   PROC(REMOVE,          enc_remove,     dec_remove),
4676   PROC(RENAME,          enc_rename,     dec_rename),
4677   PROC(LINK,            enc_link,       dec_link),
4678   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4679   PROC(CREATE,          enc_create,     dec_create),
4680   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4681   PROC(STATFS,          enc_statfs,     dec_statfs),
4682   PROC(READLINK,        enc_readlink,   dec_readlink),
4683   PROC(READDIR,         enc_readdir,    dec_readdir),
4684   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4685   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4686   PROC(GETACL,          enc_getacl,     dec_getacl),
4687   PROC(SETACL,          enc_setacl,     dec_setacl),
4688   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4689 };
4690
4691 struct rpc_version              nfs_version4 = {
4692         .number                 = 4,
4693         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4694         .procs                  = nfs4_procedures
4695 };
4696
4697 /*
4698  * Local variables:
4699  *  c-basic-offset: 8
4700  * End:
4701  */