SAFE public projects git trees. - safe/jmp/linux-2.6/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 248 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 249 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 250                                 encode_putfh_maxsz + \
 251                                 encode_read_maxsz)
 252 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 253                                 decode_putfh_maxsz + \
 254                                 decode_read_maxsz)
 255 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 256                                 encode_putfh_maxsz + \
 257                                 encode_readlink_maxsz)
 258 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 259                                 decode_putfh_maxsz + \
 260                                 decode_readlink_maxsz)
 261 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 262                                 encode_putfh_maxsz + \
 263                                 encode_readdir_maxsz)
 264 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 265                                 decode_putfh_maxsz + \
 266                                 decode_readdir_maxsz)
 267 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 268                                 encode_putfh_maxsz + \
 269                                 encode_write_maxsz + \
 270                                 encode_getattr_maxsz)
 271 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 272                                 decode_putfh_maxsz + \
 273                                 decode_write_maxsz + \
 274                                 decode_getattr_maxsz)
 275 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 276                                 encode_putfh_maxsz + \
 277                                 encode_commit_maxsz + \
 278                                 encode_getattr_maxsz)
 279 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 280                                 decode_putfh_maxsz + \
 281                                 decode_commit_maxsz + \
 282                                 decode_getattr_maxsz)
 283 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 284                                 encode_putfh_maxsz + \
 285                                 encode_savefh_maxsz + \
 286                                 encode_open_maxsz + \
 287                                 encode_getfh_maxsz + \
 288                                 encode_getattr_maxsz + \
 289                                 encode_restorefh_maxsz + \
 290                                 encode_getattr_maxsz)
 291 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 292                                 decode_putfh_maxsz + \
 293                                 decode_savefh_maxsz + \
 294                                 decode_open_maxsz + \
 295                                 decode_getfh_maxsz + \
 296                                 decode_getattr_maxsz + \
 297                                 decode_restorefh_maxsz + \
 298                                 decode_getattr_maxsz)
 299 #define NFS4_enc_open_confirm_sz \
 300                                 (compound_encode_hdr_maxsz + \
 301                                  encode_putfh_maxsz + \
 302                                  encode_open_confirm_maxsz)
 303 #define NFS4_dec_open_confirm_sz \
 304                                 (compound_decode_hdr_maxsz + \
 305                                  decode_putfh_maxsz + \
 306                                  decode_open_confirm_maxsz)
 307 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 308                                         encode_putfh_maxsz + \
 309                                         encode_open_maxsz + \
 310                                         encode_getattr_maxsz)
 311 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 312                                         decode_putfh_maxsz + \
 313                                         decode_open_maxsz + \
 314                                         decode_getattr_maxsz)
 315 #define NFS4_enc_open_downgrade_sz \
 316                                 (compound_encode_hdr_maxsz + \
 317                                  encode_putfh_maxsz + \
 318                                  encode_open_downgrade_maxsz + \
 319                                  encode_getattr_maxsz)
 320 #define NFS4_dec_open_downgrade_sz \
 321                                 (compound_decode_hdr_maxsz + \
 322                                  decode_putfh_maxsz + \
 323                                  decode_open_downgrade_maxsz + \
 324                                  decode_getattr_maxsz)
 325 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 326                                  encode_putfh_maxsz + \
 327                                  encode_close_maxsz + \
 328                                  encode_getattr_maxsz)
 329 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 330                                  decode_putfh_maxsz + \
 331                                  decode_close_maxsz + \
 332                                  decode_getattr_maxsz)
 333 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 334                                  encode_putfh_maxsz + \
 335                                  encode_setattr_maxsz + \
 336                                  encode_getattr_maxsz)
 337 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 338                                  decode_putfh_maxsz + \
 339                                  decode_setattr_maxsz + \
 340                                  decode_getattr_maxsz)
 341 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 342                                 encode_putfh_maxsz + \
 343                                 encode_fsinfo_maxsz)
 344 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 345                                 decode_putfh_maxsz + \
 346                                 decode_fsinfo_maxsz)
 347 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 348                                 encode_renew_maxsz)
 349 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 350                                 decode_renew_maxsz)
 351 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 352                                 encode_setclientid_maxsz)
 353 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 354                                 decode_setclientid_maxsz)
 355 #define NFS4_enc_setclientid_confirm_sz \
 356                                 (compound_encode_hdr_maxsz + \
 357                                 encode_setclientid_confirm_maxsz + \
 358                                 encode_putrootfh_maxsz + \
 359                                 encode_fsinfo_maxsz)
 360 #define NFS4_dec_setclientid_confirm_sz \
 361                                 (compound_decode_hdr_maxsz + \
 362                                 decode_setclientid_confirm_maxsz + \
 363                                 decode_putrootfh_maxsz + \
 364                                 decode_fsinfo_maxsz)
 365 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_lock_maxsz)
 368 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 369                                 decode_putfh_maxsz + \
 370                                 decode_lock_maxsz)
 371 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 372                                 encode_putfh_maxsz + \
 373                                 encode_lockt_maxsz)
 374 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 375                                  decode_putfh_maxsz + \
 376                                  decode_lockt_maxsz)
 377 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_locku_maxsz)
 380 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_locku_maxsz)
 383 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_access_maxsz + \
 386                                 encode_getattr_maxsz)
 387 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 388                                 decode_putfh_maxsz + \
 389                                 decode_access_maxsz + \
 390                                 decode_getattr_maxsz)
 391 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 392                                 encode_putfh_maxsz + \
 393                                 encode_getattr_maxsz)
 394 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 395                                 decode_putfh_maxsz + \
 396                                 decode_getattr_maxsz)
 397 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 398                                 encode_putfh_maxsz + \
 399                                 encode_lookup_maxsz + \
 400                                 encode_getattr_maxsz + \
 401                                 encode_getfh_maxsz)
 402 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 403                                 decode_putfh_maxsz + \
 404                                 decode_lookup_maxsz + \
 405                                 decode_getattr_maxsz + \
 406                                 decode_getfh_maxsz)
 407 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 408                                 encode_putrootfh_maxsz + \
 409                                 encode_getattr_maxsz + \
 410                                 encode_getfh_maxsz)
 411 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 412                                 decode_putrootfh_maxsz + \
 413                                 decode_getattr_maxsz + \
 414                                 decode_getfh_maxsz)
 415 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 416                                 encode_putfh_maxsz + \
 417                                 encode_remove_maxsz + \
 418                                 encode_getattr_maxsz)
 419 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 420                                 decode_putfh_maxsz + \
 421                                 decode_remove_maxsz + \
 422                                 decode_getattr_maxsz)
 423 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_savefh_maxsz + \
 426                                 encode_putfh_maxsz + \
 427                                 encode_rename_maxsz + \
 428                                 encode_getattr_maxsz + \
 429                                 encode_restorefh_maxsz + \
 430                                 encode_getattr_maxsz)
 431 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 432                                 decode_putfh_maxsz + \
 433                                 decode_savefh_maxsz + \
 434                                 decode_putfh_maxsz + \
 435                                 decode_rename_maxsz + \
 436                                 decode_getattr_maxsz + \
 437                                 decode_restorefh_maxsz + \
 438                                 decode_getattr_maxsz)
 439 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 440                                 encode_putfh_maxsz + \
 441                                 encode_savefh_maxsz + \
 442                                 encode_putfh_maxsz + \
 443                                 encode_link_maxsz + \
 444                                 decode_getattr_maxsz + \
 445                                 encode_restorefh_maxsz + \
 446                                 decode_getattr_maxsz)
 447 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 448                                 decode_putfh_maxsz + \
 449                                 decode_savefh_maxsz + \
 450                                 decode_putfh_maxsz + \
 451                                 decode_link_maxsz + \
 452                                 decode_getattr_maxsz + \
 453                                 decode_restorefh_maxsz + \
 454                                 decode_getattr_maxsz)
 455 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 456                                 encode_putfh_maxsz + \
 457                                 encode_symlink_maxsz + \
 458                                 encode_getattr_maxsz + \
 459                                 encode_getfh_maxsz)
 460 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 461                                 decode_putfh_maxsz + \
 462                                 decode_symlink_maxsz + \
 463                                 decode_getattr_maxsz + \
 464                                 decode_getfh_maxsz)
 465 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_savefh_maxsz + \
 468                                 encode_create_maxsz + \
 469                                 encode_getfh_maxsz + \
 470                                 encode_getattr_maxsz + \
 471                                 encode_restorefh_maxsz + \
 472                                 encode_getattr_maxsz)
 473 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 474                                 decode_putfh_maxsz + \
 475                                 decode_savefh_maxsz + \
 476                                 decode_create_maxsz + \
 477                                 decode_getfh_maxsz + \
 478                                 decode_getattr_maxsz + \
 479                                 decode_restorefh_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 482                                 encode_putfh_maxsz + \
 483                                 encode_getattr_maxsz)
 484 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 485                                 decode_putfh_maxsz + \
 486                                 decode_getattr_maxsz)
 487 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 488                                 encode_putfh_maxsz + \
 489                                 encode_statfs_maxsz)
 490 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 491                                 decode_putfh_maxsz + \
 492                                 decode_statfs_maxsz)
 493 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 494                                 encode_putfh_maxsz + \
 495                                 encode_getattr_maxsz)
 496 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 497                                 decode_putfh_maxsz + \
 498                                 decode_getattr_maxsz)
 499 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 500                                 encode_putfh_maxsz + \
 501                                 encode_delegreturn_maxsz + \
 502                                 encode_getattr_maxsz)
 503 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 504                                 decode_delegreturn_maxsz + \
 505                                 decode_getattr_maxsz)
 506 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 507                                 encode_putfh_maxsz + \
 508                                 encode_getacl_maxsz)
 509 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 510                                 decode_putfh_maxsz + \
 511                                 decode_getacl_maxsz)
 512 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_putfh_maxsz + \
 514                                 encode_setacl_maxsz)
 515 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 516                                 decode_putfh_maxsz + \
 517                                 decode_setacl_maxsz)
 518 #define NFS4_enc_fs_locations_sz \
 519                                 (compound_encode_hdr_maxsz + \
 520                                  encode_putfh_maxsz + \
 521                                  encode_lookup_maxsz + \
 522                                  encode_fs_locations_maxsz)
 523 #define NFS4_dec_fs_locations_sz \
 524                                 (compound_decode_hdr_maxsz + \
 525                                  decode_putfh_maxsz + \
 526                                  decode_lookup_maxsz + \
 527                                  decode_fs_locations_maxsz)
 528
 529 static const umode_t nfs_type2fmt[] = {
 530         [NF4BAD] = 0,
 531         [NF4REG] = S_IFREG,
 532         [NF4DIR] = S_IFDIR,
 533         [NF4BLK] = S_IFBLK,
 534         [NF4CHR] = S_IFCHR,
 535         [NF4LNK] = S_IFLNK,
 536         [NF4SOCK] = S_IFSOCK,
 537         [NF4FIFO] = S_IFIFO,
 538         [NF4ATTRDIR] = 0,
 539         [NF4NAMEDATTR] = 0,
 540 };
 541
 542 struct compound_hdr {
 543         int32_t         status;
 544         uint32_t        nops;
 545         __be32 *        nops_p;
 546         uint32_t        taglen;
 547         char *          tag;
 548         uint32_t        replen;         /* expected reply words */
 549 };
 550
 551 /*
 552  * START OF "GENERIC" ENCODE ROUTINES.
 553  *   These may look a little ugly since they are imported from a "generic"
 554  * set of XDR encode/decode routines which are intended to be shared by
 555  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 556  *
 557  * If the pain of reading these is too great, it should be a straightforward
 558  * task to translate them into Linux-specific versions which are more
 559  * consistent with the style used in NFSv2/v3...
 560  */
 561 #define WRITE32(n)               *p++ = htonl(n)
 562 #define WRITE64(n)               do {                           \
 563         *p++ = htonl((uint32_t)((n) >> 32));                            \
 564         *p++ = htonl((uint32_t)(n));                                    \
 565 } while (0)
 566 #define WRITEMEM(ptr,nbytes)     do {                           \
 567         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 568 } while (0)
 569
 570 #define RESERVE_SPACE(nbytes)   do {                            \
 571         p = xdr_reserve_space(xdr, nbytes);                     \
 572         BUG_ON(!p);                                             \
 573 } while (0)
 574
 575 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 576 {
 577         __be32 *p;
 578
 579         p = xdr_reserve_space(xdr, 4 + len);
 580         BUG_ON(p == NULL);
 581         xdr_encode_opaque(p, str, len);
 582 }
 583
 584 static void encode_compound_hdr(struct xdr_stream *xdr,
 585                                 struct rpc_rqst *req,
 586                                 struct compound_hdr *hdr)
 587 {
 588         __be32 *p;
 589         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 590
 591         /* initialize running count of expected bytes in reply.
 592          * NOTE: the replied tag SHOULD be the same is the one sent,
 593          * but this is not required as a MUST for the server to do so. */
 594         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 595
 596         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 597         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 598         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 599         WRITE32(hdr->taglen);
 600         WRITEMEM(hdr->tag, hdr->taglen);
 601         WRITE32(NFS4_MINOR_VERSION);
 602         hdr->nops_p = p;
 603         WRITE32(hdr->nops);
 604 }
 605
 606 static void encode_nops(struct compound_hdr *hdr)
 607 {
 608         *hdr->nops_p = htonl(hdr->nops);
 609 }
 610
 611 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 612 {
 613         __be32 *p;
 614
 615         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 616         BUG_ON(p == NULL);
 617         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 618 }
 619
 620 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 621 {
 622         char owner_name[IDMAP_NAMESZ];
 623         char owner_group[IDMAP_NAMESZ];
 624         int owner_namelen = 0;
 625         int owner_grouplen = 0;
 626         __be32 *p;
 627         __be32 *q;
 628         int len;
 629         uint32_t bmval0 = 0;
 630         uint32_t bmval1 = 0;
 631
 632         /*
 633          * We reserve enough space to write the entire attribute buffer at once.
 634          * In the worst-case, this would be
 635          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 636          *          = 36 bytes, plus any contribution from variable-length fields
 637          *            such as owner/group.
 638          */
 639         len = 16;
 640
 641         /* Sigh */
 642         if (iap->ia_valid & ATTR_SIZE)
 643                 len += 8;
 644         if (iap->ia_valid & ATTR_MODE)
 645                 len += 4;
 646         if (iap->ia_valid & ATTR_UID) {
 647                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 648                 if (owner_namelen < 0) {
 649                         dprintk("nfs: couldn't resolve uid %d to string\n",
 650                                         iap->ia_uid);
 651                         /* XXX */
 652                         strcpy(owner_name, "nobody");
 653                         owner_namelen = sizeof("nobody") - 1;
 654                         /* goto out; */
 655                 }
 656                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 657         }
 658         if (iap->ia_valid & ATTR_GID) {
 659                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 660                 if (owner_grouplen < 0) {
 661                         dprintk("nfs: couldn't resolve gid %d to string\n",
 662                                         iap->ia_gid);
 663                         strcpy(owner_group, "nobody");
 664                         owner_grouplen = sizeof("nobody") - 1;
 665                         /* goto out; */
 666                 }
 667                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 668         }
 669         if (iap->ia_valid & ATTR_ATIME_SET)
 670                 len += 16;
 671         else if (iap->ia_valid & ATTR_ATIME)
 672                 len += 4;
 673         if (iap->ia_valid & ATTR_MTIME_SET)
 674                 len += 16;
 675         else if (iap->ia_valid & ATTR_MTIME)
 676                 len += 4;
 677         RESERVE_SPACE(len);
 678
 679         /*
 680          * We write the bitmap length now, but leave the bitmap and the attribute
 681          * buffer length to be backfilled at the end of this routine.
 682          */
 683         WRITE32(2);
 684         q = p;
 685         p += 3;
 686
 687         if (iap->ia_valid & ATTR_SIZE) {
 688                 bmval0 |= FATTR4_WORD0_SIZE;
 689                 WRITE64(iap->ia_size);
 690         }
 691         if (iap->ia_valid & ATTR_MODE) {
 692                 bmval1 |= FATTR4_WORD1_MODE;
 693                 WRITE32(iap->ia_mode & S_IALLUGO);
 694         }
 695         if (iap->ia_valid & ATTR_UID) {
 696                 bmval1 |= FATTR4_WORD1_OWNER;
 697                 WRITE32(owner_namelen);
 698                 WRITEMEM(owner_name, owner_namelen);
 699         }
 700         if (iap->ia_valid & ATTR_GID) {
 701                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 702                 WRITE32(owner_grouplen);
 703                 WRITEMEM(owner_group, owner_grouplen);
 704         }
 705         if (iap->ia_valid & ATTR_ATIME_SET) {
 706                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 707                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 708                 WRITE32(0);
 709                 WRITE32(iap->ia_mtime.tv_sec);
 710                 WRITE32(iap->ia_mtime.tv_nsec);
 711         }
 712         else if (iap->ia_valid & ATTR_ATIME) {
 713                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 714                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 715         }
 716         if (iap->ia_valid & ATTR_MTIME_SET) {
 717                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 718                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 719                 WRITE32(0);
 720                 WRITE32(iap->ia_mtime.tv_sec);
 721                 WRITE32(iap->ia_mtime.tv_nsec);
 722         }
 723         else if (iap->ia_valid & ATTR_MTIME) {
 724                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 725                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 726         }
 727
 728         /*
 729          * Now we backfill the bitmap and the attribute buffer length.
 730          */
 731         if (len != ((char *)p - (char *)q) + 4) {
 732                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 733                                 len, ((char *)p - (char *)q) + 4);
 734                 BUG();
 735         }
 736         len = (char *)p - (char *)q - 12;
 737         *q++ = htonl(bmval0);
 738         *q++ = htonl(bmval1);
 739         *q++ = htonl(len);
 740
 741 /* out: */
 742 }
 743
 744 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 745 {
 746         __be32 *p;
 747
 748         RESERVE_SPACE(8);
 749         WRITE32(OP_ACCESS);
 750         WRITE32(access);
 751         hdr->nops++;
 752 }
 753
 754 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 755 {
 756         __be32 *p;
 757
 758         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 759         WRITE32(OP_CLOSE);
 760         WRITE32(arg->seqid->sequence->counter);
 761         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 762         hdr->nops++;
 763 }
 764
 765 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 766 {
 767         __be32 *p;
 768
 769         RESERVE_SPACE(16);
 770         WRITE32(OP_COMMIT);
 771         WRITE64(args->offset);
 772         WRITE32(args->count);
 773         hdr->nops++;
 774 }
 775
 776 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 777 {
 778         __be32 *p;
 779
 780         RESERVE_SPACE(8);
 781         WRITE32(OP_CREATE);
 782         WRITE32(create->ftype);
 783
 784         switch (create->ftype) {
 785         case NF4LNK:
 786                 RESERVE_SPACE(4);
 787                 WRITE32(create->u.symlink.len);
 788                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 789                 break;
 790
 791         case NF4BLK: case NF4CHR:
 792                 RESERVE_SPACE(8);
 793                 WRITE32(create->u.device.specdata1);
 794                 WRITE32(create->u.device.specdata2);
 795                 break;
 796
 797         default:
 798                 break;
 799         }
 800
 801         RESERVE_SPACE(4 + create->name->len);
 802         WRITE32(create->name->len);
 803         WRITEMEM(create->name->name, create->name->len);
 804         hdr->nops++;
 805
 806         encode_attrs(xdr, create->attrs, create->server);
 807 }
 808
 809 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 810 {
 811         __be32 *p;
 812
 813         RESERVE_SPACE(12);
 814         WRITE32(OP_GETATTR);
 815         WRITE32(1);
 816         WRITE32(bitmap);
 817         hdr->nops++;
 818 }
 819
 820 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 821 {
 822         __be32 *p;
 823
 824         RESERVE_SPACE(16);
 825         WRITE32(OP_GETATTR);
 826         WRITE32(2);
 827         WRITE32(bm0);
 828         WRITE32(bm1);
 829         hdr->nops++;
 830 }
 831
 832 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 833 {
 834         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 835                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 836 }
 837
 838 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 839 {
 840         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 841                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 842 }
 843
 844 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 845 {
 846         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 847                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 848 }
 849
 850 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 851 {
 852         __be32 *p;
 853
 854         RESERVE_SPACE(4);
 855         WRITE32(OP_GETFH);
 856         hdr->nops++;
 857 }
 858
 859 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 860 {
 861         __be32 *p;
 862
 863         RESERVE_SPACE(8 + name->len);
 864         WRITE32(OP_LINK);
 865         WRITE32(name->len);
 866         WRITEMEM(name->name, name->len);
 867         hdr->nops++;
 868 }
 869
 870 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 871 {
 872         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 873                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 874         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 875 }
 876
 877 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 878 {
 879         if (fl->fl_end == OFFSET_MAX)
 880                 return ~(uint64_t)0;
 881         return fl->fl_end - fl->fl_start + 1;
 882 }
 883
 884 /*
 885  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 886  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 887  */
 888 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 889 {
 890         __be32 *p;
 891
 892         RESERVE_SPACE(32);
 893         WRITE32(OP_LOCK);
 894         WRITE32(nfs4_lock_type(args->fl, args->block));
 895         WRITE32(args->reclaim);
 896         WRITE64(args->fl->fl_start);
 897         WRITE64(nfs4_lock_length(args->fl));
 898         WRITE32(args->new_lock_owner);
 899         if (args->new_lock_owner){
 900                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 901                 WRITE32(args->open_seqid->sequence->counter);
 902                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 903                 WRITE32(args->lock_seqid->sequence->counter);
 904                 WRITE64(args->lock_owner.clientid);
 905                 WRITE32(16);
 906                 WRITEMEM("lock id:", 8);
 907                 WRITE64(args->lock_owner.id);
 908         }
 909         else {
 910                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 911                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 912                 WRITE32(args->lock_seqid->sequence->counter);
 913         }
 914         hdr->nops++;
 915 }
 916
 917 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 918 {
 919         __be32 *p;
 920
 921         RESERVE_SPACE(52);
 922         WRITE32(OP_LOCKT);
 923         WRITE32(nfs4_lock_type(args->fl, 0));
 924         WRITE64(args->fl->fl_start);
 925         WRITE64(nfs4_lock_length(args->fl));
 926         WRITE64(args->lock_owner.clientid);
 927         WRITE32(16);
 928         WRITEMEM("lock id:", 8);
 929         WRITE64(args->lock_owner.id);
 930         hdr->nops++;
 931 }
 932
 933 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 934 {
 935         __be32 *p;
 936
 937         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 938         WRITE32(OP_LOCKU);
 939         WRITE32(nfs4_lock_type(args->fl, 0));
 940         WRITE32(args->seqid->sequence->counter);
 941         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 942         WRITE64(args->fl->fl_start);
 943         WRITE64(nfs4_lock_length(args->fl));
 944         hdr->nops++;
 945 }
 946
 947 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 948 {
 949         int len = name->len;
 950         __be32 *p;
 951
 952         RESERVE_SPACE(8 + len);
 953         WRITE32(OP_LOOKUP);
 954         WRITE32(len);
 955         WRITEMEM(name->name, len);
 956         hdr->nops++;
 957 }
 958
 959 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 960 {
 961         __be32 *p;
 962
 963         RESERVE_SPACE(8);
 964         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 965         case FMODE_READ:
 966                 WRITE32(NFS4_SHARE_ACCESS_READ);
 967                 break;
 968         case FMODE_WRITE:
 969                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 970                 break;
 971         case FMODE_READ|FMODE_WRITE:
 972                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 973                 break;
 974         default:
 975                 WRITE32(0);
 976         }
 977         WRITE32(0);             /* for linux, share_deny = 0 always */
 978 }
 979
 980 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 981 {
 982         __be32 *p;
 983  /*
 984  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 985  * owner 4 = 32
 986  */
 987         RESERVE_SPACE(8);
 988         WRITE32(OP_OPEN);
 989         WRITE32(arg->seqid->sequence->counter);
 990         encode_share_access(xdr, arg->fmode);
 991         RESERVE_SPACE(28);
 992         WRITE64(arg->clientid);
 993         WRITE32(16);
 994         WRITEMEM("open id:", 8);
 995         WRITE64(arg->id);
 996 }
 997
 998 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 999 {
1000         __be32 *p;
1001
1002         RESERVE_SPACE(4);
1003         switch(arg->open_flags & O_EXCL) {
1004         case 0:
1005                 WRITE32(NFS4_CREATE_UNCHECKED);
1006                 encode_attrs(xdr, arg->u.attrs, arg->server);
1007                 break;
1008         default:
1009                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1010                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1011         }
1012 }
1013
1014 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1015 {
1016         __be32 *p;
1017
1018         RESERVE_SPACE(4);
1019         switch (arg->open_flags & O_CREAT) {
1020         case 0:
1021                 WRITE32(NFS4_OPEN_NOCREATE);
1022                 break;
1023         default:
1024                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1025                 WRITE32(NFS4_OPEN_CREATE);
1026                 encode_createmode(xdr, arg);
1027         }
1028 }
1029
1030 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1031 {
1032         __be32 *p;
1033
1034         RESERVE_SPACE(4);
1035         switch (delegation_type) {
1036         case 0:
1037                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1038                 break;
1039         case FMODE_READ:
1040                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1041                 break;
1042         case FMODE_WRITE|FMODE_READ:
1043                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1044                 break;
1045         default:
1046                 BUG();
1047         }
1048 }
1049
1050 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1051 {
1052         __be32 *p;
1053
1054         RESERVE_SPACE(4);
1055         WRITE32(NFS4_OPEN_CLAIM_NULL);
1056         encode_string(xdr, name->len, name->name);
1057 }
1058
1059 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1060 {
1061         __be32 *p;
1062
1063         RESERVE_SPACE(4);
1064         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1065         encode_delegation_type(xdr, type);
1066 }
1067
1068 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1069 {
1070         __be32 *p;
1071
1072         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1073         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1074         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1075         encode_string(xdr, name->len, name->name);
1076 }
1077
1078 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1079 {
1080         encode_openhdr(xdr, arg);
1081         encode_opentype(xdr, arg);
1082         switch (arg->claim) {
1083         case NFS4_OPEN_CLAIM_NULL:
1084                 encode_claim_null(xdr, arg->name);
1085                 break;
1086         case NFS4_OPEN_CLAIM_PREVIOUS:
1087                 encode_claim_previous(xdr, arg->u.delegation_type);
1088                 break;
1089         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1090                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1091                 break;
1092         default:
1093                 BUG();
1094         }
1095         hdr->nops++;
1096 }
1097
1098 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1099 {
1100         __be32 *p;
1101
1102         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1103         WRITE32(OP_OPEN_CONFIRM);
1104         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1105         WRITE32(arg->seqid->sequence->counter);
1106         hdr->nops++;
1107 }
1108
1109 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1110 {
1111         __be32 *p;
1112
1113         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1114         WRITE32(OP_OPEN_DOWNGRADE);
1115         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1116         WRITE32(arg->seqid->sequence->counter);
1117         encode_share_access(xdr, arg->fmode);
1118         hdr->nops++;
1119 }
1120
1121 static void
1122 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1123 {
1124         int len = fh->size;
1125         __be32 *p;
1126
1127         RESERVE_SPACE(8 + len);
1128         WRITE32(OP_PUTFH);
1129         WRITE32(len);
1130         WRITEMEM(fh->data, len);
1131         hdr->nops++;
1132 }
1133
1134 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1135 {
1136         __be32 *p;
1137
1138         RESERVE_SPACE(4);
1139         WRITE32(OP_PUTROOTFH);
1140         hdr->nops++;
1141 }
1142
1143 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1144 {
1145         nfs4_stateid stateid;
1146         __be32 *p;
1147
1148         RESERVE_SPACE(NFS4_STATEID_SIZE);
1149         if (ctx->state != NULL) {
1150                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1151                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1152         } else
1153                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1154 }
1155
1156 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1157 {
1158         __be32 *p;
1159
1160         RESERVE_SPACE(4);
1161         WRITE32(OP_READ);
1162
1163         encode_stateid(xdr, args->context);
1164
1165         RESERVE_SPACE(12);
1166         WRITE64(args->offset);
1167         WRITE32(args->count);
1168         hdr->nops++;
1169 }
1170
1171 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1172 {
1173         uint32_t attrs[2] = {
1174                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1175                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1176         };
1177         __be32 *p;
1178
1179         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1180         WRITE32(OP_READDIR);
1181         WRITE64(readdir->cookie);
1182         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1183         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1184         WRITE32(readdir->count);
1185         WRITE32(2);
1186         /* Switch to mounted_on_fileid if the server supports it */
1187         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1188                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1189         else
1190                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1191         WRITE32(attrs[0] & readdir->bitmask[0]);
1192         WRITE32(attrs[1] & readdir->bitmask[1]);
1193         hdr->nops++;
1194         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1195                         __func__,
1196                         (unsigned long long)readdir->cookie,
1197                         ((u32 *)readdir->verifier.data)[0],
1198                         ((u32 *)readdir->verifier.data)[1],
1199                         attrs[0] & readdir->bitmask[0],
1200                         attrs[1] & readdir->bitmask[1]);
1201 }
1202
1203 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1204 {
1205         __be32 *p;
1206
1207         RESERVE_SPACE(4);
1208         WRITE32(OP_READLINK);
1209         hdr->nops++;
1210 }
1211
1212 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1213 {
1214         __be32 *p;
1215
1216         RESERVE_SPACE(8 + name->len);
1217         WRITE32(OP_REMOVE);
1218         WRITE32(name->len);
1219         WRITEMEM(name->name, name->len);
1220         hdr->nops++;
1221 }
1222
1223 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1224 {
1225         __be32 *p;
1226
1227         RESERVE_SPACE(8 + oldname->len);
1228         WRITE32(OP_RENAME);
1229         WRITE32(oldname->len);
1230         WRITEMEM(oldname->name, oldname->len);
1231
1232         RESERVE_SPACE(4 + newname->len);
1233         WRITE32(newname->len);
1234         WRITEMEM(newname->name, newname->len);
1235         hdr->nops++;
1236 }
1237
1238 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1239 {
1240         __be32 *p;
1241
1242         RESERVE_SPACE(12);
1243         WRITE32(OP_RENEW);
1244         WRITE64(client_stateid->cl_clientid);
1245         hdr->nops++;
1246 }
1247
1248 static void
1249 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1250 {
1251         __be32 *p;
1252
1253         RESERVE_SPACE(4);
1254         WRITE32(OP_RESTOREFH);
1255         hdr->nops++;
1256 }
1257
1258 static int
1259 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1260 {
1261         __be32 *p;
1262
1263         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1264         WRITE32(OP_SETATTR);
1265         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1266         RESERVE_SPACE(2*4);
1267         WRITE32(1);
1268         WRITE32(FATTR4_WORD0_ACL);
1269         if (arg->acl_len % 4)
1270                 return -EINVAL;
1271         RESERVE_SPACE(4);
1272         WRITE32(arg->acl_len);
1273         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1274         hdr->nops++;
1275         return 0;
1276 }
1277
1278 static void
1279 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1280 {
1281         __be32 *p;
1282
1283         RESERVE_SPACE(4);
1284         WRITE32(OP_SAVEFH);
1285         hdr->nops++;
1286 }
1287
1288 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1289 {
1290         __be32 *p;
1291
1292         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1293         WRITE32(OP_SETATTR);
1294         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1295         hdr->nops++;
1296         encode_attrs(xdr, arg->iap, server);
1297 }
1298
1299 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1300 {
1301         __be32 *p;
1302
1303         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1304         WRITE32(OP_SETCLIENTID);
1305         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1306
1307         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1308         RESERVE_SPACE(4);
1309         WRITE32(setclientid->sc_prog);
1310         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1311         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1312         RESERVE_SPACE(4);
1313         WRITE32(setclientid->sc_cb_ident);
1314         hdr->nops++;
1315 }
1316
1317 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1318 {
1319         __be32 *p;
1320
1321         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1322         WRITE32(OP_SETCLIENTID_CONFIRM);
1323         WRITE64(client_state->cl_clientid);
1324         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1325         hdr->nops++;
1326 }
1327
1328 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1329 {
1330         __be32 *p;
1331
1332         RESERVE_SPACE(4);
1333         WRITE32(OP_WRITE);
1334
1335         encode_stateid(xdr, args->context);
1336
1337         RESERVE_SPACE(16);
1338         WRITE64(args->offset);
1339         WRITE32(args->stable);
1340         WRITE32(args->count);
1341
1342         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1343         hdr->nops++;
1344 }
1345
1346 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1347 {
1348         __be32 *p;
1349
1350         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1351
1352         WRITE32(OP_DELEGRETURN);
1353         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1354         hdr->nops++;
1355 }
1356 /*
1357  * END OF "GENERIC" ENCODE ROUTINES.
1358  */
1359
1360 /*
1361  * Encode an ACCESS request
1362  */
1363 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1364 {
1365         struct xdr_stream xdr;
1366         struct compound_hdr hdr = {
1367                 .nops = 0,
1368         };
1369
1370         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1371         encode_compound_hdr(&xdr, req, &hdr);
1372         encode_putfh(&xdr, args->fh, &hdr);
1373         encode_access(&xdr, args->access, &hdr);
1374         encode_getfattr(&xdr, args->bitmask, &hdr);
1375         encode_nops(&hdr);
1376         return 0;
1377 }
1378
1379 /*
1380  * Encode LOOKUP request
1381  */
1382 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1383 {
1384         struct xdr_stream xdr;
1385         struct compound_hdr hdr = {
1386                 .nops = 0,
1387         };
1388
1389         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1390         encode_compound_hdr(&xdr, req, &hdr);
1391         encode_putfh(&xdr, args->dir_fh, &hdr);
1392         encode_lookup(&xdr, args->name, &hdr);
1393         encode_getfh(&xdr, &hdr);
1394         encode_getfattr(&xdr, args->bitmask, &hdr);
1395         encode_nops(&hdr);
1396         return 0;
1397 }
1398
1399 /*
1400  * Encode LOOKUP_ROOT request
1401  */
1402 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1403 {
1404         struct xdr_stream xdr;
1405         struct compound_hdr hdr = {
1406                 .nops = 0,
1407         };
1408
1409         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1410         encode_compound_hdr(&xdr, req, &hdr);
1411         encode_putrootfh(&xdr, &hdr);
1412         encode_getfh(&xdr, &hdr);
1413         encode_getfattr(&xdr, args->bitmask, &hdr);
1414         encode_nops(&hdr);
1415         return 0;
1416 }
1417
1418 /*
1419  * Encode REMOVE request
1420  */
1421 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1422 {
1423         struct xdr_stream xdr;
1424         struct compound_hdr hdr = {
1425                 .nops = 0,
1426         };
1427
1428         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1429         encode_compound_hdr(&xdr, req, &hdr);
1430         encode_putfh(&xdr, args->fh, &hdr);
1431         encode_remove(&xdr, &args->name, &hdr);
1432         encode_getfattr(&xdr, args->bitmask, &hdr);
1433         encode_nops(&hdr);
1434         return 0;
1435 }
1436
1437 /*
1438  * Encode RENAME request
1439  */
1440 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1441 {
1442         struct xdr_stream xdr;
1443         struct compound_hdr hdr = {
1444                 .nops = 0,
1445         };
1446
1447         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1448         encode_compound_hdr(&xdr, req, &hdr);
1449         encode_putfh(&xdr, args->old_dir, &hdr);
1450         encode_savefh(&xdr, &hdr);
1451         encode_putfh(&xdr, args->new_dir, &hdr);
1452         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1453         encode_getfattr(&xdr, args->bitmask, &hdr);
1454         encode_restorefh(&xdr, &hdr);
1455         encode_getfattr(&xdr, args->bitmask, &hdr);
1456         encode_nops(&hdr);
1457         return 0;
1458 }
1459
1460 /*
1461  * Encode LINK request
1462  */
1463 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1464 {
1465         struct xdr_stream xdr;
1466         struct compound_hdr hdr = {
1467                 .nops = 0,
1468         };
1469
1470         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1471         encode_compound_hdr(&xdr, req, &hdr);
1472         encode_putfh(&xdr, args->fh, &hdr);
1473         encode_savefh(&xdr, &hdr);
1474         encode_putfh(&xdr, args->dir_fh, &hdr);
1475         encode_link(&xdr, args->name, &hdr);
1476         encode_getfattr(&xdr, args->bitmask, &hdr);
1477         encode_restorefh(&xdr, &hdr);
1478         encode_getfattr(&xdr, args->bitmask, &hdr);
1479         encode_nops(&hdr);
1480         return 0;
1481 }
1482
1483 /*
1484  * Encode CREATE request
1485  */
1486 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1487 {
1488         struct xdr_stream xdr;
1489         struct compound_hdr hdr = {
1490                 .nops = 0,
1491         };
1492
1493         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1494         encode_compound_hdr(&xdr, req, &hdr);
1495         encode_putfh(&xdr, args->dir_fh, &hdr);
1496         encode_savefh(&xdr, &hdr);
1497         encode_create(&xdr, args, &hdr);
1498         encode_getfh(&xdr, &hdr);
1499         encode_getfattr(&xdr, args->bitmask, &hdr);
1500         encode_restorefh(&xdr, &hdr);
1501         encode_getfattr(&xdr, args->bitmask, &hdr);
1502         encode_nops(&hdr);
1503         return 0;
1504 }
1505
1506 /*
1507  * Encode SYMLINK request
1508  */
1509 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1510 {
1511         return nfs4_xdr_enc_create(req, p, args);
1512 }
1513
1514 /*
1515  * Encode GETATTR request
1516  */
1517 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1518 {
1519         struct xdr_stream xdr;
1520         struct compound_hdr hdr = {
1521                 .nops = 0,
1522         };
1523
1524         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1525         encode_compound_hdr(&xdr, req, &hdr);
1526         encode_putfh(&xdr, args->fh, &hdr);
1527         encode_getfattr(&xdr, args->bitmask, &hdr);
1528         encode_nops(&hdr);
1529         return 0;
1530 }
1531
1532 /*
1533  * Encode a CLOSE request
1534  */
1535 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1536 {
1537         struct xdr_stream xdr;
1538         struct compound_hdr hdr = {
1539                 .nops   = 0,
1540         };
1541
1542         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1543         encode_compound_hdr(&xdr, req, &hdr);
1544         encode_putfh(&xdr, args->fh, &hdr);
1545         encode_close(&xdr, args, &hdr);
1546         encode_getfattr(&xdr, args->bitmask, &hdr);
1547         encode_nops(&hdr);
1548         return 0;
1549 }
1550
1551 /*
1552  * Encode an OPEN request
1553  */
1554 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1555 {
1556         struct xdr_stream xdr;
1557         struct compound_hdr hdr = {
1558                 .nops = 0,
1559         };
1560
1561         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1562         encode_compound_hdr(&xdr, req, &hdr);
1563         encode_putfh(&xdr, args->fh, &hdr);
1564         encode_savefh(&xdr, &hdr);
1565         encode_open(&xdr, args, &hdr);
1566         encode_getfh(&xdr, &hdr);
1567         encode_getfattr(&xdr, args->bitmask, &hdr);
1568         encode_restorefh(&xdr, &hdr);
1569         encode_getfattr(&xdr, args->bitmask, &hdr);
1570         encode_nops(&hdr);
1571         return 0;
1572 }
1573
1574 /*
1575  * Encode an OPEN_CONFIRM request
1576  */
1577 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1578 {
1579         struct xdr_stream xdr;
1580         struct compound_hdr hdr = {
1581                 .nops   = 0,
1582         };
1583
1584         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1585         encode_compound_hdr(&xdr, req, &hdr);
1586         encode_putfh(&xdr, args->fh, &hdr);
1587         encode_open_confirm(&xdr, args, &hdr);
1588         encode_nops(&hdr);
1589         return 0;
1590 }
1591
1592 /*
1593  * Encode an OPEN request with no attributes.
1594  */
1595 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1596 {
1597         struct xdr_stream xdr;
1598         struct compound_hdr hdr = {
1599                 .nops   = 0,
1600         };
1601
1602         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1603         encode_compound_hdr(&xdr, req, &hdr);
1604         encode_putfh(&xdr, args->fh, &hdr);
1605         encode_open(&xdr, args, &hdr);
1606         encode_getfattr(&xdr, args->bitmask, &hdr);
1607         encode_nops(&hdr);
1608         return 0;
1609 }
1610
1611 /*
1612  * Encode an OPEN_DOWNGRADE request
1613  */
1614 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1615 {
1616         struct xdr_stream xdr;
1617         struct compound_hdr hdr = {
1618                 .nops   = 0,
1619         };
1620
1621         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1622         encode_compound_hdr(&xdr, req, &hdr);
1623         encode_putfh(&xdr, args->fh, &hdr);
1624         encode_open_downgrade(&xdr, args, &hdr);
1625         encode_getfattr(&xdr, args->bitmask, &hdr);
1626         encode_nops(&hdr);
1627         return 0;
1628 }
1629
1630 /*
1631  * Encode a LOCK request
1632  */
1633 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1634 {
1635         struct xdr_stream xdr;
1636         struct compound_hdr hdr = {
1637                 .nops   = 0,
1638         };
1639
1640         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1641         encode_compound_hdr(&xdr, req, &hdr);
1642         encode_putfh(&xdr, args->fh, &hdr);
1643         encode_lock(&xdr, args, &hdr);
1644         encode_nops(&hdr);
1645         return 0;
1646 }
1647
1648 /*
1649  * Encode a LOCKT request
1650  */
1651 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1652 {
1653         struct xdr_stream xdr;
1654         struct compound_hdr hdr = {
1655                 .nops   = 0,
1656         };
1657
1658         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1659         encode_compound_hdr(&xdr, req, &hdr);
1660         encode_putfh(&xdr, args->fh, &hdr);
1661         encode_lockt(&xdr, args, &hdr);
1662         encode_nops(&hdr);
1663         return 0;
1664 }
1665
1666 /*
1667  * Encode a LOCKU request
1668  */
1669 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1670 {
1671         struct xdr_stream xdr;
1672         struct compound_hdr hdr = {
1673                 .nops   = 0,
1674         };
1675
1676         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1677         encode_compound_hdr(&xdr, req, &hdr);
1678         encode_putfh(&xdr, args->fh, &hdr);
1679         encode_locku(&xdr, args, &hdr);
1680         encode_nops(&hdr);
1681         return 0;
1682 }
1683
1684 /*
1685  * Encode a READLINK request
1686  */
1687 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1688 {
1689         struct xdr_stream xdr;
1690         struct compound_hdr hdr = {
1691                 .nops = 0,
1692         };
1693         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1694         unsigned int replen;
1695
1696         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1697         encode_compound_hdr(&xdr, req, &hdr);
1698         encode_putfh(&xdr, args->fh, &hdr);
1699         encode_readlink(&xdr, args, req, &hdr);
1700
1701         /* set up reply kvec
1702          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1703          *      + OP_READLINK + status + string length = 8
1704          */
1705         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1706         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1707                         args->pgbase, args->pglen);
1708         encode_nops(&hdr);
1709         return 0;
1710 }
1711
1712 /*
1713  * Encode a READDIR request
1714  */
1715 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1716 {
1717         struct xdr_stream xdr;
1718         struct compound_hdr hdr = {
1719                 .nops = 0,
1720         };
1721         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1722         int replen;
1723
1724         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1725         encode_compound_hdr(&xdr, req, &hdr);
1726         encode_putfh(&xdr, args->fh, &hdr);
1727         encode_readdir(&xdr, args, req, &hdr);
1728
1729         /* set up reply kvec
1730          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1731          *      + OP_READDIR + status + verifer(2)  = 9
1732          */
1733         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1734         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1735                          args->pgbase, args->count);
1736         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1737                         __func__, replen, args->pages,
1738                         args->pgbase, args->count);
1739         encode_nops(&hdr);
1740         return 0;
1741 }
1742
1743 /*
1744  * Encode a READ request
1745  */
1746 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1747 {
1748         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1749         struct xdr_stream xdr;
1750         struct compound_hdr hdr = {
1751                 .nops = 0,
1752         };
1753         int replen;
1754
1755         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1756         encode_compound_hdr(&xdr, req, &hdr);
1757         encode_putfh(&xdr, args->fh, &hdr);
1758         encode_read(&xdr, args, &hdr);
1759
1760         /* set up reply kvec
1761          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1762          *       + OP_READ + status + eof + datalen = 9
1763          */
1764         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1765         xdr_inline_pages(&req->rq_rcv_buf, replen,
1766                          args->pages, args->pgbase, args->count);
1767         req->rq_rcv_buf.flags |= XDRBUF_READ;
1768         encode_nops(&hdr);
1769         return 0;
1770 }
1771
1772 /*
1773  * Encode an SETATTR request
1774  */
1775 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1776 {
1777         struct xdr_stream xdr;
1778         struct compound_hdr hdr = {
1779                 .nops   = 0,
1780         };
1781
1782         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1783         encode_compound_hdr(&xdr, req, &hdr);
1784         encode_putfh(&xdr, args->fh, &hdr);
1785         encode_setattr(&xdr, args, args->server, &hdr);
1786         encode_getfattr(&xdr, args->bitmask, &hdr);
1787         encode_nops(&hdr);
1788         return 0;
1789 }
1790
1791 /*
1792  * Encode a GETACL request
1793  */
1794 static int
1795 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1796                 struct nfs_getaclargs *args)
1797 {
1798         struct xdr_stream xdr;
1799         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1800         struct compound_hdr hdr = {
1801                 .nops   = 0,
1802         };
1803         int replen;
1804
1805         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1806         encode_compound_hdr(&xdr, req, &hdr);
1807         encode_putfh(&xdr, args->fh, &hdr);
1808         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1809
1810         /* set up reply buffer: */
1811         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1812         xdr_inline_pages(&req->rq_rcv_buf, replen,
1813                 args->acl_pages, args->acl_pgbase, args->acl_len);
1814         encode_nops(&hdr);
1815         return 0;
1816 }
1817
1818 /*
1819  * Encode a WRITE request
1820  */
1821 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1822 {
1823         struct xdr_stream xdr;
1824         struct compound_hdr hdr = {
1825                 .nops = 0,
1826         };
1827
1828         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1829         encode_compound_hdr(&xdr, req, &hdr);
1830         encode_putfh(&xdr, args->fh, &hdr);
1831         encode_write(&xdr, args, &hdr);
1832         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1833         encode_getfattr(&xdr, args->bitmask, &hdr);
1834         encode_nops(&hdr);
1835         return 0;
1836 }
1837
1838 /*
1839  *  a COMMIT request
1840  */
1841 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1842 {
1843         struct xdr_stream xdr;
1844         struct compound_hdr hdr = {
1845                 .nops = 0,
1846         };
1847
1848         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1849         encode_compound_hdr(&xdr, req, &hdr);
1850         encode_putfh(&xdr, args->fh, &hdr);
1851         encode_commit(&xdr, args, &hdr);
1852         encode_getfattr(&xdr, args->bitmask, &hdr);
1853         encode_nops(&hdr);
1854         return 0;
1855 }
1856
1857 /*
1858  * FSINFO request
1859  */
1860 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1861 {
1862         struct xdr_stream xdr;
1863         struct compound_hdr hdr = {
1864                 .nops   = 0,
1865         };
1866
1867         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1868         encode_compound_hdr(&xdr, req, &hdr);
1869         encode_putfh(&xdr, args->fh, &hdr);
1870         encode_fsinfo(&xdr, args->bitmask, &hdr);
1871         encode_nops(&hdr);
1872         return 0;
1873 }
1874
1875 /*
1876  * a PATHCONF request
1877  */
1878 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1879 {
1880         struct xdr_stream xdr;
1881         struct compound_hdr hdr = {
1882                 .nops = 0,
1883         };
1884
1885         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1886         encode_compound_hdr(&xdr, req, &hdr);
1887         encode_putfh(&xdr, args->fh, &hdr);
1888         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1889                            &hdr);
1890         encode_nops(&hdr);
1891         return 0;
1892 }
1893
1894 /*
1895  * a STATFS request
1896  */
1897 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1898 {
1899         struct xdr_stream xdr;
1900         struct compound_hdr hdr = {
1901                 .nops = 0,
1902         };
1903
1904         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1905         encode_compound_hdr(&xdr, req, &hdr);
1906         encode_putfh(&xdr, args->fh, &hdr);
1907         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1908                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1909         encode_nops(&hdr);
1910         return 0;
1911 }
1912
1913 /*
1914  * GETATTR_BITMAP request
1915  */
1916 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
1917                                     struct nfs4_server_caps_arg *args)
1918 {
1919         struct xdr_stream xdr;
1920         struct compound_hdr hdr = {
1921                 .nops = 0,
1922         };
1923
1924         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1925         encode_compound_hdr(&xdr, req, &hdr);
1926         encode_putfh(&xdr, args->fhandle, &hdr);
1927         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1928                            FATTR4_WORD0_LINK_SUPPORT|
1929                            FATTR4_WORD0_SYMLINK_SUPPORT|
1930                            FATTR4_WORD0_ACLSUPPORT, &hdr);
1931         encode_nops(&hdr);
1932         return 0;
1933 }
1934
1935 /*
1936  * a RENEW request
1937  */
1938 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1939 {
1940         struct xdr_stream xdr;
1941         struct compound_hdr hdr = {
1942                 .nops   = 0,
1943         };
1944
1945         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1946         encode_compound_hdr(&xdr, req, &hdr);
1947         encode_renew(&xdr, clp, &hdr);
1948         encode_nops(&hdr);
1949         return 0;
1950 }
1951
1952 /*
1953  * a SETCLIENTID request
1954  */
1955 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1956 {
1957         struct xdr_stream xdr;
1958         struct compound_hdr hdr = {
1959                 .nops   = 0,
1960         };
1961
1962         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1963         encode_compound_hdr(&xdr, req, &hdr);
1964         encode_setclientid(&xdr, sc, &hdr);
1965         encode_nops(&hdr);
1966         return 0;
1967 }
1968
1969 /*
1970  * a SETCLIENTID_CONFIRM request
1971  */
1972 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1973 {
1974         struct xdr_stream xdr;
1975         struct compound_hdr hdr = {
1976                 .nops   = 0,
1977         };
1978         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1979
1980         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1981         encode_compound_hdr(&xdr, req, &hdr);
1982         encode_setclientid_confirm(&xdr, clp, &hdr);
1983         encode_putrootfh(&xdr, &hdr);
1984         encode_fsinfo(&xdr, lease_bitmap, &hdr);
1985         encode_nops(&hdr);
1986         return 0;
1987 }
1988
1989 /*
1990  * DELEGRETURN request
1991  */
1992 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1993 {
1994         struct xdr_stream xdr;
1995         struct compound_hdr hdr = {
1996                 .nops = 0,
1997         };
1998
1999         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2000         encode_compound_hdr(&xdr, req, &hdr);
2001         encode_putfh(&xdr, args->fhandle, &hdr);
2002         encode_delegreturn(&xdr, args->stateid, &hdr);
2003         encode_getfattr(&xdr, args->bitmask, &hdr);
2004         encode_nops(&hdr);
2005         return 0;
2006 }
2007
2008 /*
2009  * Encode FS_LOCATIONS request
2010  */
2011 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2012 {
2013         struct xdr_stream xdr;
2014         struct compound_hdr hdr = {
2015                 .nops = 0,
2016         };
2017         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2018         int replen;
2019
2020         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2021         encode_compound_hdr(&xdr, req, &hdr);
2022         encode_putfh(&xdr, args->dir_fh, &hdr);
2023         encode_lookup(&xdr, args->name, &hdr);
2024         encode_fs_locations(&xdr, args->bitmask, &hdr);
2025
2026         /* set up reply
2027          *   toplevel_status + OP_PUTFH + status
2028          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2029          */
2030         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2031         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2032                         0, PAGE_SIZE);
2033         encode_nops(&hdr);
2034         return 0;
2035 }
2036
2037 /*
2038  * START OF "GENERIC" DECODE ROUTINES.
2039  *   These may look a little ugly since they are imported from a "generic"
2040  * set of XDR encode/decode routines which are intended to be shared by
2041  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2042  *
2043  * If the pain of reading these is too great, it should be a straightforward
2044  * task to translate them into Linux-specific versions which are more
2045  * consistent with the style used in NFSv2/v3...
2046  */
2047 #define READ32(x)         (x) = ntohl(*p++)
2048 #define READ64(x)         do {                  \
2049         (x) = (u64)ntohl(*p++) << 32;           \
2050         (x) |= ntohl(*p++);                     \
2051 } while (0)
2052 #define READTIME(x)       do {                  \
2053         p++;                                    \
2054         (x.tv_sec) = ntohl(*p++);               \
2055         (x.tv_nsec) = ntohl(*p++);              \
2056 } while (0)
2057 #define COPYMEM(x,nbytes) do {                  \
2058         memcpy((x), p, nbytes);                 \
2059         p += XDR_QUADLEN(nbytes);               \
2060 } while (0)
2061
2062 #define READ_BUF(nbytes)  do { \
2063         p = xdr_inline_decode(xdr, nbytes); \
2064         if (unlikely(!p)) { \
2065                 dprintk("nfs: %s: prematurely hit end of receive" \
2066                                 " buffer\n", __func__); \
2067                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2068                                 __func__, xdr->p, nbytes, xdr->end); \
2069                 return -EIO; \
2070         } \
2071 } while (0)
2072
2073 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2074 {
2075         __be32 *p;
2076
2077         READ_BUF(4);
2078         READ32(*len);
2079         READ_BUF(*len);
2080         *string = (char *)p;
2081         return 0;
2082 }
2083
2084 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2085 {
2086         __be32 *p;
2087
2088         READ_BUF(8);
2089         READ32(hdr->status);
2090         READ32(hdr->taglen);
2091
2092         READ_BUF(hdr->taglen + 4);
2093         hdr->tag = (char *)p;
2094         p += XDR_QUADLEN(hdr->taglen);
2095         READ32(hdr->nops);
2096         if (unlikely(hdr->nops < 1))
2097                 return nfs4_stat_to_errno(hdr->status);
2098         return 0;
2099 }
2100
2101 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2102 {
2103         __be32 *p;
2104         uint32_t opnum;
2105         int32_t nfserr;
2106
2107         READ_BUF(8);
2108         READ32(opnum);
2109         if (opnum != expected) {
2110                 dprintk("nfs: Server returned operation"
2111                         " %d but we issued a request for %d\n",
2112                                 opnum, expected);
2113                 return -EIO;
2114         }
2115         READ32(nfserr);
2116         if (nfserr != NFS_OK)
2117                 return nfs4_stat_to_errno(nfserr);
2118         return 0;
2119 }
2120
2121 /* Dummy routine */
2122 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2123 {
2124         __be32 *p;
2125         unsigned int strlen;
2126         char *str;
2127
2128         READ_BUF(12);
2129         return decode_opaque_inline(xdr, &strlen, &str);
2130 }
2131
2132 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2133 {
2134         uint32_t bmlen;
2135         __be32 *p;
2136
2137         READ_BUF(4);
2138         READ32(bmlen);
2139
2140         bitmap[0] = bitmap[1] = 0;
2141         READ_BUF((bmlen << 2));
2142         if (bmlen > 0) {
2143                 READ32(bitmap[0]);
2144                 if (bmlen > 1)
2145                         READ32(bitmap[1]);
2146         }
2147         return 0;
2148 }
2149
2150 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2151 {
2152         __be32 *p;
2153
2154         READ_BUF(4);
2155         READ32(*attrlen);
2156         *savep = xdr->p;
2157         return 0;
2158 }
2159
2160 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2161 {
2162         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2163                 decode_attr_bitmap(xdr, bitmask);
2164                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2165         } else
2166                 bitmask[0] = bitmask[1] = 0;
2167         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2168         return 0;
2169 }
2170
2171 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2172 {
2173         __be32 *p;
2174         int ret = 0;
2175
2176         *type = 0;
2177         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2178                 return -EIO;
2179         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2180                 READ_BUF(4);
2181                 READ32(*type);
2182                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2183                         dprintk("%s: bad type %d\n", __func__, *type);
2184                         return -EIO;
2185                 }
2186                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2187                 ret = NFS_ATTR_FATTR_TYPE;
2188         }
2189         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2190         return ret;
2191 }
2192
2193 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2194 {
2195         __be32 *p;
2196         int ret = 0;
2197
2198         *change = 0;
2199         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2200                 return -EIO;
2201         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2202                 READ_BUF(8);
2203                 READ64(*change);
2204                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2205                 ret = NFS_ATTR_FATTR_CHANGE;
2206         }
2207         dprintk("%s: change attribute=%Lu\n", __func__,
2208                         (unsigned long long)*change);
2209         return ret;
2210 }
2211
2212 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2213 {
2214         __be32 *p;
2215         int ret = 0;
2216
2217         *size = 0;
2218         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2219                 return -EIO;
2220         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2221                 READ_BUF(8);
2222                 READ64(*size);
2223                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2224                 ret = NFS_ATTR_FATTR_SIZE;
2225         }
2226         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2227         return ret;
2228 }
2229
2230 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2231 {
2232         __be32 *p;
2233
2234         *res = 0;
2235         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2236                 return -EIO;
2237         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2238                 READ_BUF(4);
2239                 READ32(*res);
2240                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2241         }
2242         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2243         return 0;
2244 }
2245
2246 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2247 {
2248         __be32 *p;
2249
2250         *res = 0;
2251         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2252                 return -EIO;
2253         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2254                 READ_BUF(4);
2255                 READ32(*res);
2256                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2257         }
2258         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2259         return 0;
2260 }
2261
2262 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2263 {
2264         __be32 *p;
2265         int ret = 0;
2266
2267         fsid->major = 0;
2268         fsid->minor = 0;
2269         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2270                 return -EIO;
2271         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2272                 READ_BUF(16);
2273                 READ64(fsid->major);
2274                 READ64(fsid->minor);
2275                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2276                 ret = NFS_ATTR_FATTR_FSID;
2277         }
2278         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2279                         (unsigned long long)fsid->major,
2280                         (unsigned long long)fsid->minor);
2281         return ret;
2282 }
2283
2284 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2285 {
2286         __be32 *p;
2287
2288         *res = 60;
2289         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2290                 return -EIO;
2291         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2292                 READ_BUF(4);
2293                 READ32(*res);
2294                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2295         }
2296         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2297         return 0;
2298 }
2299
2300 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2301 {
2302         __be32 *p;
2303
2304         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2305         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2306                 return -EIO;
2307         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2308                 READ_BUF(4);
2309                 READ32(*res);
2310                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2311         }
2312         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2313         return 0;
2314 }
2315
2316 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2317 {
2318         __be32 *p;
2319         int ret = 0;
2320
2321         *fileid = 0;
2322         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2323                 return -EIO;
2324         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2325                 READ_BUF(8);
2326                 READ64(*fileid);
2327                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2328                 ret = NFS_ATTR_FATTR_FILEID;
2329         }
2330         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2331         return ret;
2332 }
2333
2334 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2335 {
2336         __be32 *p;
2337         int ret = 0;
2338
2339         *fileid = 0;
2340         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2341                 return -EIO;
2342         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2343                 READ_BUF(8);
2344                 READ64(*fileid);
2345                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2346                 ret = NFS_ATTR_FATTR_FILEID;
2347         }
2348         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2349         return ret;
2350 }
2351
2352 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2353 {
2354         __be32 *p;
2355         int status = 0;
2356
2357         *res = 0;
2358         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2359                 return -EIO;
2360         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2361                 READ_BUF(8);
2362                 READ64(*res);
2363                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2364         }
2365         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2366         return status;
2367 }
2368
2369 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2370 {
2371         __be32 *p;
2372         int status = 0;
2373
2374         *res = 0;
2375         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2376                 return -EIO;
2377         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2378                 READ_BUF(8);
2379                 READ64(*res);
2380                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2381         }
2382         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2383         return status;
2384 }
2385
2386 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2387 {
2388         __be32 *p;
2389         int status = 0;
2390
2391         *res = 0;
2392         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2393                 return -EIO;
2394         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2395                 READ_BUF(8);
2396                 READ64(*res);
2397                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2398         }
2399         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2400         return status;
2401 }
2402
2403 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2404 {
2405         u32 n;
2406         __be32 *p;
2407         int status = 0;
2408
2409         READ_BUF(4);
2410         READ32(n);
2411         if (n == 0)
2412                 goto root_path;
2413         dprintk("path ");
2414         path->ncomponents = 0;
2415         while (path->ncomponents < n) {
2416                 struct nfs4_string *component = &path->components[path->ncomponents];
2417                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2418                 if (unlikely(status != 0))
2419                         goto out_eio;
2420                 if (path->ncomponents != n)
2421                         dprintk("/");
2422                 dprintk("%s", component->data);
2423                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2424                         path->ncomponents++;
2425                 else {
2426                         dprintk("cannot parse %d components in path\n", n);
2427                         goto out_eio;
2428                 }
2429         }
2430 out:
2431         dprintk("\n");
2432         return status;
2433 root_path:
2434 /* a root pathname is sent as a zero component4 */
2435         path->ncomponents = 1;
2436         path->components[0].len=0;
2437         path->components[0].data=NULL;
2438         dprintk("path /\n");
2439         goto out;
2440 out_eio:
2441         dprintk(" status %d", status);
2442         status = -EIO;
2443         goto out;
2444 }
2445
2446 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2447 {
2448         int n;
2449         __be32 *p;
2450         int status = -EIO;
2451
2452         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2453                 goto out;
2454         status = 0;
2455         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2456                 goto out;
2457         dprintk("%s: fsroot ", __func__);
2458         status = decode_pathname(xdr, &res->fs_path);
2459         if (unlikely(status != 0))
2460                 goto out;
2461         READ_BUF(4);
2462         READ32(n);
2463         if (n <= 0)
2464                 goto out_eio;
2465         res->nlocations = 0;
2466         while (res->nlocations < n) {
2467                 u32 m;
2468                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2469
2470                 READ_BUF(4);
2471                 READ32(m);
2472
2473                 loc->nservers = 0;
2474                 dprintk("%s: servers ", __func__);
2475                 while (loc->nservers < m) {
2476                         struct nfs4_string *server = &loc->servers[loc->nservers];
2477                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2478                         if (unlikely(status != 0))
2479                                 goto out_eio;
2480                         dprintk("%s ", server->data);
2481                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2482                                 loc->nservers++;
2483                         else {
2484                                 unsigned int i;
2485                                 dprintk("%s: using first %u of %u servers "
2486                                         "returned for location %u\n",
2487                                                 __func__,
2488                                                 NFS4_FS_LOCATION_MAXSERVERS,
2489                                                 m, res->nlocations);
2490                                 for (i = loc->nservers; i < m; i++) {
2491                                         unsigned int len;
2492                                         char *data;
2493                                         status = decode_opaque_inline(xdr, &len, &data);
2494                                         if (unlikely(status != 0))
2495                                                 goto out_eio;
2496                                 }
2497                         }
2498                 }
2499                 status = decode_pathname(xdr, &loc->rootpath);
2500                 if (unlikely(status != 0))
2501                         goto out_eio;
2502                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2503                         res->nlocations++;
2504         }
2505         if (res->nlocations != 0)
2506                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2507 out:
2508         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2509         return status;
2510 out_eio:
2511         status = -EIO;
2512         goto out;
2513 }
2514
2515 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2516 {
2517         __be32 *p;
2518         int status = 0;
2519
2520         *res = 0;
2521         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2522                 return -EIO;
2523         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2524                 READ_BUF(8);
2525                 READ64(*res);
2526                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2527         }
2528         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2529         return status;
2530 }
2531
2532 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2533 {
2534         __be32 *p;
2535         int status = 0;
2536
2537         *maxlink = 1;
2538         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2539                 return -EIO;
2540         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2541                 READ_BUF(4);
2542                 READ32(*maxlink);
2543                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2544         }
2545         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2546         return status;
2547 }
2548
2549 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2550 {
2551         __be32 *p;
2552         int status = 0;
2553
2554         *maxname = 1024;
2555         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2556                 return -EIO;
2557         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2558                 READ_BUF(4);
2559                 READ32(*maxname);
2560                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2561         }
2562         dprintk("%s: maxname=%u\n", __func__, *maxname);
2563         return status;
2564 }
2565
2566 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2567 {
2568         __be32 *p;
2569         int status = 0;
2570
2571         *res = 1024;
2572         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2573                 return -EIO;
2574         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2575                 uint64_t maxread;
2576                 READ_BUF(8);
2577                 READ64(maxread);
2578                 if (maxread > 0x7FFFFFFF)
2579                         maxread = 0x7FFFFFFF;
2580                 *res = (uint32_t)maxread;
2581                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2582         }
2583         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2584         return status;
2585 }
2586
2587 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2588 {
2589         __be32 *p;
2590         int status = 0;
2591
2592         *res = 1024;
2593         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2594                 return -EIO;
2595         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2596                 uint64_t maxwrite;
2597                 READ_BUF(8);
2598                 READ64(maxwrite);
2599                 if (maxwrite > 0x7FFFFFFF)
2600                         maxwrite = 0x7FFFFFFF;
2601                 *res = (uint32_t)maxwrite;
2602                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2603         }
2604         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2605         return status;
2606 }
2607
2608 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2609 {
2610         uint32_t tmp;
2611         __be32 *p;
2612         int ret = 0;
2613
2614         *mode = 0;
2615         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2616                 return -EIO;
2617         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2618                 READ_BUF(4);
2619                 READ32(tmp);
2620                 *mode = tmp & ~S_IFMT;
2621                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2622                 ret = NFS_ATTR_FATTR_MODE;
2623         }
2624         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2625         return ret;
2626 }
2627
2628 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2629 {
2630         __be32 *p;
2631         int ret = 0;
2632
2633         *nlink = 1;
2634         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2635                 return -EIO;
2636         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2637                 READ_BUF(4);
2638                 READ32(*nlink);
2639                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2640                 ret = NFS_ATTR_FATTR_NLINK;
2641         }
2642         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2643         return ret;
2644 }
2645
2646 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2647 {
2648         uint32_t len;
2649         __be32 *p;
2650         int ret = 0;
2651
2652         *uid = -2;
2653         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2654                 return -EIO;
2655         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2656                 READ_BUF(4);
2657                 READ32(len);
2658                 READ_BUF(len);
2659                 if (len < XDR_MAX_NETOBJ) {
2660                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2661                                 ret = NFS_ATTR_FATTR_OWNER;
2662                         else
2663                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2664                                                 __func__);
2665                 } else
2666                         dprintk("%s: name too long (%u)!\n",
2667                                         __func__, len);
2668                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2669         }
2670         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2671         return ret;
2672 }
2673
2674 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2675 {
2676         uint32_t len;
2677         __be32 *p;
2678         int ret = 0;
2679
2680         *gid = -2;
2681         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2682                 return -EIO;
2683         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2684                 READ_BUF(4);
2685                 READ32(len);
2686                 READ_BUF(len);
2687                 if (len < XDR_MAX_NETOBJ) {
2688                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2689                                 ret = NFS_ATTR_FATTR_GROUP;
2690                         else
2691                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2692                                                 __func__);
2693                 } else
2694                         dprintk("%s: name too long (%u)!\n",
2695                                         __func__, len);
2696                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2697         }
2698         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2699         return ret;
2700 }
2701
2702 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2703 {
2704         uint32_t major = 0, minor = 0;
2705         __be32 *p;
2706         int ret = 0;
2707
2708         *rdev = MKDEV(0,0);
2709         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2710                 return -EIO;
2711         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2712                 dev_t tmp;
2713
2714                 READ_BUF(8);
2715                 READ32(major);
2716                 READ32(minor);
2717                 tmp = MKDEV(major, minor);
2718                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2719                         *rdev = tmp;
2720                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2721                 ret = NFS_ATTR_FATTR_RDEV;
2722         }
2723         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2724         return ret;
2725 }
2726
2727 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2728 {
2729         __be32 *p;
2730         int status = 0;
2731
2732         *res = 0;
2733         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2734                 return -EIO;
2735         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2736                 READ_BUF(8);
2737                 READ64(*res);
2738                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2739         }
2740         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2741         return status;
2742 }
2743
2744 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2745 {
2746         __be32 *p;
2747         int status = 0;
2748
2749         *res = 0;
2750         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2751                 return -EIO;
2752         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2753                 READ_BUF(8);
2754                 READ64(*res);
2755                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2756         }
2757         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2758         return status;
2759 }
2760
2761 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2762 {
2763         __be32 *p;
2764         int status = 0;
2765
2766         *res = 0;
2767         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2768                 return -EIO;
2769         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2770                 READ_BUF(8);
2771                 READ64(*res);
2772                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2773         }
2774         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2775         return status;
2776 }
2777
2778 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2779 {
2780         __be32 *p;
2781         int ret = 0;
2782
2783         *used = 0;
2784         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2785                 return -EIO;
2786         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2787                 READ_BUF(8);
2788                 READ64(*used);
2789                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2790                 ret = NFS_ATTR_FATTR_SPACE_USED;
2791         }
2792         dprintk("%s: space used=%Lu\n", __func__,
2793                         (unsigned long long)*used);
2794         return ret;
2795 }
2796
2797 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2798 {
2799         __be32 *p;
2800         uint64_t sec;
2801         uint32_t nsec;
2802
2803         READ_BUF(12);
2804         READ64(sec);
2805         READ32(nsec);
2806         time->tv_sec = (time_t)sec;
2807         time->tv_nsec = (long)nsec;
2808         return 0;
2809 }
2810
2811 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2812 {
2813         int status = 0;
2814
2815         time->tv_sec = 0;
2816         time->tv_nsec = 0;
2817         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2818                 return -EIO;
2819         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2820                 status = decode_attr_time(xdr, time);
2821                 if (status == 0)
2822                         status = NFS_ATTR_FATTR_ATIME;
2823                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2824         }
2825         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2826         return status;
2827 }
2828
2829 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2830 {
2831         int status = 0;
2832
2833         time->tv_sec = 0;
2834         time->tv_nsec = 0;
2835         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2836                 return -EIO;
2837         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2838                 status = decode_attr_time(xdr, time);
2839                 if (status == 0)
2840                         status = NFS_ATTR_FATTR_CTIME;
2841                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2842         }
2843         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2844         return status;
2845 }
2846
2847 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2848 {
2849         int status = 0;
2850
2851         time->tv_sec = 0;
2852         time->tv_nsec = 0;
2853         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2854                 return -EIO;
2855         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2856                 status = decode_attr_time(xdr, time);
2857                 if (status == 0)
2858                         status = NFS_ATTR_FATTR_MTIME;
2859                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2860         }
2861         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2862         return status;
2863 }
2864
2865 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2866 {
2867         unsigned int attrwords = XDR_QUADLEN(attrlen);
2868         unsigned int nwords = xdr->p - savep;
2869
2870         if (unlikely(attrwords != nwords)) {
2871                 dprintk("%s: server returned incorrect attribute length: "
2872                         "%u %c %u\n",
2873                                 __func__,
2874                                 attrwords << 2,
2875                                 (attrwords < nwords) ? '<' : '>',
2876                                 nwords << 2);
2877                 return -EIO;
2878         }
2879         return 0;
2880 }
2881
2882 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2883 {
2884         __be32 *p;
2885
2886         READ_BUF(20);
2887         READ32(cinfo->atomic);
2888         READ64(cinfo->before);
2889         READ64(cinfo->after);
2890         return 0;
2891 }
2892
2893 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2894 {
2895         __be32 *p;
2896         uint32_t supp, acc;
2897         int status;
2898
2899         status = decode_op_hdr(xdr, OP_ACCESS);
2900         if (status)
2901                 return status;
2902         READ_BUF(8);
2903         READ32(supp);
2904         READ32(acc);
2905         access->supported = supp;
2906         access->access = acc;
2907         return 0;
2908 }
2909
2910 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2911 {
2912         __be32 *p;
2913         int status;
2914
2915         status = decode_op_hdr(xdr, OP_CLOSE);
2916         if (status != -EIO)
2917                 nfs_increment_open_seqid(status, res->seqid);
2918         if (status)
2919                 return status;
2920         READ_BUF(NFS4_STATEID_SIZE);
2921         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2922         return 0;
2923 }
2924
2925 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2926 {
2927         __be32 *p;
2928         int status;
2929
2930         status = decode_op_hdr(xdr, OP_COMMIT);
2931         if (status)
2932                 return status;
2933         READ_BUF(8);
2934         COPYMEM(res->verf->verifier, 8);
2935         return 0;
2936 }
2937
2938 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2939 {
2940         __be32 *p;
2941         uint32_t bmlen;
2942         int status;
2943
2944         status = decode_op_hdr(xdr, OP_CREATE);
2945         if (status)
2946                 return status;
2947         if ((status = decode_change_info(xdr, cinfo)))
2948                 return status;
2949         READ_BUF(4);
2950         READ32(bmlen);
2951         READ_BUF(bmlen << 2);
2952         return 0;
2953 }
2954
2955 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2956 {
2957         __be32 *savep;
2958         uint32_t attrlen, bitmap[2] = {0};
2959         int status;
2960
2961         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2962                 goto xdr_error;
2963         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2964                 goto xdr_error;
2965         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2966                 goto xdr_error;
2967         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2968                 goto xdr_error;
2969         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2970                 goto xdr_error;
2971         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2972                 goto xdr_error;
2973         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2974                 goto xdr_error;
2975         status = verify_attr_len(xdr, savep, attrlen);
2976 xdr_error:
2977         dprintk("%s: xdr returned %d!\n", __func__, -status);
2978         return status;
2979 }
2980
2981 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2982 {
2983         __be32 *savep;
2984         uint32_t attrlen, bitmap[2] = {0};
2985         int status;
2986
2987         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2988                 goto xdr_error;
2989         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2990                 goto xdr_error;
2991         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2992                 goto xdr_error;
2993
2994         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2995                 goto xdr_error;
2996         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2997                 goto xdr_error;
2998         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2999                 goto xdr_error;
3000         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3001                 goto xdr_error;
3002         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3003                 goto xdr_error;
3004         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3005                 goto xdr_error;
3006
3007         status = verify_attr_len(xdr, savep, attrlen);
3008 xdr_error:
3009         dprintk("%s: xdr returned %d!\n", __func__, -status);
3010         return status;
3011 }
3012
3013 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3014 {
3015         __be32 *savep;
3016         uint32_t attrlen, bitmap[2] = {0};
3017         int status;
3018
3019         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3020                 goto xdr_error;
3021         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3022                 goto xdr_error;
3023         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3024                 goto xdr_error;
3025
3026         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3027                 goto xdr_error;
3028         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3029                 goto xdr_error;
3030
3031         status = verify_attr_len(xdr, savep, attrlen);
3032 xdr_error:
3033         dprintk("%s: xdr returned %d!\n", __func__, -status);
3034         return status;
3035 }
3036
3037 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3038 {
3039         __be32 *savep;
3040         uint32_t attrlen,
3041                  bitmap[2] = {0},
3042                  type;
3043         int status;
3044         umode_t fmode = 0;
3045         uint64_t fileid;
3046
3047         status = decode_op_hdr(xdr, OP_GETATTR);
3048         if (status < 0)
3049                 goto xdr_error;
3050
3051         status = decode_attr_bitmap(xdr, bitmap);
3052         if (status < 0)
3053                 goto xdr_error;
3054
3055         status = decode_attr_length(xdr, &attrlen, &savep);
3056         if (status < 0)
3057                 goto xdr_error;
3058
3059
3060         status = decode_attr_type(xdr, bitmap, &type);
3061         if (status < 0)
3062                 goto xdr_error;
3063         fattr->mode = 0;
3064         if (status != 0) {
3065                 fattr->mode |= nfs_type2fmt[type];
3066                 fattr->valid |= status;
3067         }
3068
3069         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3070         if (status < 0)
3071                 goto xdr_error;
3072         fattr->valid |= status;
3073
3074         status = decode_attr_size(xdr, bitmap, &fattr->size);
3075         if (status < 0)
3076                 goto xdr_error;
3077         fattr->valid |= status;
3078
3079         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3080         if (status < 0)
3081                 goto xdr_error;
3082         fattr->valid |= status;
3083
3084         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3085         if (status < 0)
3086                 goto xdr_error;
3087         fattr->valid |= status;
3088
3089         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3090                                                 struct nfs4_fs_locations,
3091                                                 fattr));
3092         if (status < 0)
3093                 goto xdr_error;
3094         fattr->valid |= status;
3095
3096         status = decode_attr_mode(xdr, bitmap, &fmode);
3097         if (status < 0)
3098                 goto xdr_error;
3099         if (status != 0) {
3100                 fattr->mode |= fmode;
3101                 fattr->valid |= status;
3102         }
3103
3104         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3105         if (status < 0)
3106                 goto xdr_error;
3107         fattr->valid |= status;
3108
3109         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3110         if (status < 0)
3111                 goto xdr_error;
3112         fattr->valid |= status;
3113
3114         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3115         if (status < 0)
3116                 goto xdr_error;
3117         fattr->valid |= status;
3118
3119         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3120         if (status < 0)
3121                 goto xdr_error;
3122         fattr->valid |= status;
3123
3124         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3125         if (status < 0)
3126                 goto xdr_error;
3127         fattr->valid |= status;
3128
3129         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3130         if (status < 0)
3131                 goto xdr_error;
3132         fattr->valid |= status;
3133
3134         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3135         if (status < 0)
3136                 goto xdr_error;
3137         fattr->valid |= status;
3138
3139         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3140         if (status < 0)
3141                 goto xdr_error;
3142         fattr->valid |= status;
3143
3144         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3145         if (status < 0)
3146                 goto xdr_error;
3147         if (status != 0 && !(fattr->valid & status)) {
3148                 fattr->fileid = fileid;
3149                 fattr->valid |= status;
3150         }
3151
3152         status = verify_attr_len(xdr, savep, attrlen);
3153 xdr_error:
3154         dprintk("%s: xdr returned %d\n", __func__, -status);
3155         return status;
3156 }
3157
3158
3159 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3160 {
3161         __be32 *savep;
3162         uint32_t attrlen, bitmap[2];
3163         int status;
3164
3165         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3166                 goto xdr_error;
3167         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3168                 goto xdr_error;
3169         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3170                 goto xdr_error;
3171
3172         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3173
3174         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3175                 goto xdr_error;
3176         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3177                 goto xdr_error;
3178         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3179                 goto xdr_error;
3180         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3181         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3182                 goto xdr_error;
3183         fsinfo->wtpref = fsinfo->wtmax;
3184
3185         status = verify_attr_len(xdr, savep, attrlen);
3186 xdr_error:
3187         dprintk("%s: xdr returned %d!\n", __func__, -status);
3188         return status;
3189 }
3190
3191 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3192 {
3193         __be32 *p;
3194         uint32_t len;
3195         int status;
3196
3197         /* Zero handle first to allow comparisons */
3198         memset(fh, 0, sizeof(*fh));
3199
3200         status = decode_op_hdr(xdr, OP_GETFH);
3201         if (status)
3202                 return status;
3203
3204         READ_BUF(4);
3205         READ32(len);
3206         if (len > NFS4_FHSIZE)
3207                 return -EIO;
3208         fh->size = len;
3209         READ_BUF(len);
3210         COPYMEM(fh->data, len);
3211         return 0;
3212 }
3213
3214 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3215 {
3216         int status;
3217
3218         status = decode_op_hdr(xdr, OP_LINK);
3219         if (status)
3220                 return status;
3221         return decode_change_info(xdr, cinfo);
3222 }
3223
3224 /*
3225  * We create the owner, so we know a proper owner.id length is 4.
3226  */
3227 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3228 {
3229         uint64_t offset, length, clientid;
3230         __be32 *p;
3231         uint32_t namelen, type;
3232
3233         READ_BUF(32);
3234         READ64(offset);
3235         READ64(length);
3236         READ32(type);
3237         if (fl != NULL) {
3238                 fl->fl_start = (loff_t)offset;
3239                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3240                 if (length == ~(uint64_t)0)
3241                         fl->fl_end = OFFSET_MAX;
3242                 fl->fl_type = F_WRLCK;
3243                 if (type & 1)
3244                         fl->fl_type = F_RDLCK;
3245                 fl->fl_pid = 0;
3246         }
3247         READ64(clientid);
3248         READ32(namelen);
3249         READ_BUF(namelen);
3250         return -NFS4ERR_DENIED;
3251 }
3252
3253 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3254 {
3255         __be32 *p;
3256         int status;
3257
3258         status = decode_op_hdr(xdr, OP_LOCK);
3259         if (status == -EIO)
3260                 goto out;
3261         if (status == 0) {
3262                 READ_BUF(NFS4_STATEID_SIZE);
3263                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3264         } else if (status == -NFS4ERR_DENIED)
3265                 status = decode_lock_denied(xdr, NULL);
3266         if (res->open_seqid != NULL)
3267                 nfs_increment_open_seqid(status, res->open_seqid);
3268         nfs_increment_lock_seqid(status, res->lock_seqid);
3269 out:
3270         return status;
3271 }
3272
3273 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3274 {
3275         int status;
3276         status = decode_op_hdr(xdr, OP_LOCKT);
3277         if (status == -NFS4ERR_DENIED)
3278                 return decode_lock_denied(xdr, res->denied);
3279         return status;
3280 }
3281
3282 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3283 {
3284         __be32 *p;
3285         int status;
3286
3287         status = decode_op_hdr(xdr, OP_LOCKU);
3288         if (status != -EIO)
3289                 nfs_increment_lock_seqid(status, res->seqid);
3290         if (status == 0) {
3291                 READ_BUF(NFS4_STATEID_SIZE);
3292                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3293         }
3294         return status;
3295 }
3296
3297 static int decode_lookup(struct xdr_stream *xdr)
3298 {
3299         return decode_op_hdr(xdr, OP_LOOKUP);
3300 }
3301
3302 /* This is too sick! */
3303 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3304 {
3305         __be32 *p;
3306         uint32_t limit_type, nblocks, blocksize;
3307
3308         READ_BUF(12);
3309         READ32(limit_type);
3310         switch (limit_type) {
3311         case 1:
3312                 READ64(*maxsize);
3313                 break;
3314         case 2:
3315                 READ32(nblocks);
3316                 READ32(blocksize);
3317                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3318         }
3319         return 0;
3320 }
3321
3322 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3323 {
3324         __be32 *p;
3325         uint32_t delegation_type;
3326
3327         READ_BUF(4);
3328         READ32(delegation_type);
3329         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3330                 res->delegation_type = 0;
3331                 return 0;
3332         }
3333         READ_BUF(NFS4_STATEID_SIZE+4);
3334         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3335         READ32(res->do_recall);
3336
3337         switch (delegation_type) {
3338         case NFS4_OPEN_DELEGATE_READ:
3339                 res->delegation_type = FMODE_READ;
3340                 break;
3341         case NFS4_OPEN_DELEGATE_WRITE:
3342                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3343                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3344                                 return -EIO;
3345         }
3346         return decode_ace(xdr, NULL, res->server->nfs_client);
3347 }
3348
3349 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3350 {
3351         __be32 *p;
3352         uint32_t savewords, bmlen, i;
3353         int status;
3354
3355         status = decode_op_hdr(xdr, OP_OPEN);
3356         if (status != -EIO)
3357                 nfs_increment_open_seqid(status, res->seqid);
3358         if (status)
3359                 return status;
3360         READ_BUF(NFS4_STATEID_SIZE);
3361         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3362
3363         decode_change_info(xdr, &res->cinfo);
3364
3365         READ_BUF(8);
3366         READ32(res->rflags);
3367         READ32(bmlen);
3368         if (bmlen > 10)
3369                 goto xdr_error;
3370
3371         READ_BUF(bmlen << 2);
3372         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3373         for (i = 0; i < savewords; ++i)
3374                 READ32(res->attrset[i]);
3375         for (; i < NFS4_BITMAP_SIZE; i++)
3376                 res->attrset[i] = 0;
3377
3378         return decode_delegation(xdr, res);
3379 xdr_error:
3380         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3381         return -EIO;
3382 }
3383
3384 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3385 {
3386         __be32 *p;
3387         int status;
3388
3389         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3390         if (status != -EIO)
3391                 nfs_increment_open_seqid(status, res->seqid);
3392         if (status)
3393                 return status;
3394         READ_BUF(NFS4_STATEID_SIZE);
3395         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3396         return 0;
3397 }
3398
3399 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3400 {
3401         __be32 *p;
3402         int status;
3403
3404         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3405         if (status != -EIO)
3406                 nfs_increment_open_seqid(status, res->seqid);
3407         if (status)
3408                 return status;
3409         READ_BUF(NFS4_STATEID_SIZE);
3410         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3411         return 0;
3412 }
3413
3414 static int decode_putfh(struct xdr_stream *xdr)
3415 {
3416         return decode_op_hdr(xdr, OP_PUTFH);
3417 }
3418
3419 static int decode_putrootfh(struct xdr_stream *xdr)
3420 {
3421         return decode_op_hdr(xdr, OP_PUTROOTFH);
3422 }
3423
3424 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3425 {
3426         struct kvec *iov = req->rq_rcv_buf.head;
3427         __be32 *p;
3428         uint32_t count, eof, recvd, hdrlen;
3429         int status;
3430
3431         status = decode_op_hdr(xdr, OP_READ);
3432         if (status)
3433                 return status;
3434         READ_BUF(8);
3435         READ32(eof);
3436         READ32(count);
3437         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3438         recvd = req->rq_rcv_buf.len - hdrlen;
3439         if (count > recvd) {
3440                 dprintk("NFS: server cheating in read reply: "
3441                                 "count %u > recvd %u\n", count, recvd);
3442                 count = recvd;
3443                 eof = 0;
3444         }
3445         xdr_read_pages(xdr, count);
3446         res->eof = eof;
3447         res->count = count;
3448         return 0;
3449 }
3450
3451 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3452 {
3453         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3454         struct page     *page = *rcvbuf->pages;
3455         struct kvec     *iov = rcvbuf->head;
3456         size_t          hdrlen;
3457         u32             recvd, pglen = rcvbuf->page_len;
3458         __be32          *end, *entry, *p, *kaddr;
3459         unsigned int    nr = 0;
3460         int             status;
3461
3462         status = decode_op_hdr(xdr, OP_READDIR);
3463         if (status)
3464                 return status;
3465         READ_BUF(8);
3466         COPYMEM(readdir->verifier.data, 8);
3467         dprintk("%s: verifier = %08x:%08x\n",
3468                         __func__,
3469                         ((u32 *)readdir->verifier.data)[0],
3470                         ((u32 *)readdir->verifier.data)[1]);
3471
3472
3473         hdrlen = (char *) p - (char *) iov->iov_base;
3474         recvd = rcvbuf->len - hdrlen;
3475         if (pglen > recvd)
3476                 pglen = recvd;
3477         xdr_read_pages(xdr, pglen);
3478
3479         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3480         kaddr = p = kmap_atomic(page, KM_USER0);
3481         end = p + ((pglen + readdir->pgbase) >> 2);
3482         entry = p;
3483
3484         /* Make sure the packet actually has a value_follows and EOF entry */
3485         if ((entry + 1) > end)
3486                 goto short_pkt;
3487
3488         for (; *p++; nr++) {
3489                 u32 len, attrlen, xlen;
3490                 if (end - p < 3)
3491                         goto short_pkt;
3492                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3493                 p += 2;                 /* cookie */
3494                 len = ntohl(*p++);      /* filename length */
3495                 if (len > NFS4_MAXNAMLEN) {
3496                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3497                                         len);
3498                         goto err_unmap;
3499                 }
3500                 xlen = XDR_QUADLEN(len);
3501                 if (end - p < xlen + 1)
3502                         goto short_pkt;
3503                 dprintk("filename = %*s\n", len, (char *)p);
3504                 p += xlen;
3505                 len = ntohl(*p++);      /* bitmap length */
3506                 if (end - p < len + 1)
3507                         goto short_pkt;
3508                 p += len;
3509                 attrlen = XDR_QUADLEN(ntohl(*p++));
3510                 if (end - p < attrlen + 2)
3511                         goto short_pkt;
3512                 p += attrlen;           /* attributes */
3513                 entry = p;
3514         }
3515         /*
3516          * Apparently some server sends responses that are a valid size, but
3517          * contain no entries, and have value_follows==0 and EOF==0. For
3518          * those, just set the EOF marker.
3519          */
3520         if (!nr && entry[1] == 0) {
3521                 dprintk("NFS: readdir reply truncated!\n");
3522                 entry[1] = 1;
3523         }
3524 out:
3525         kunmap_atomic(kaddr, KM_USER0);
3526         return 0;
3527 short_pkt:
3528         /*
3529          * When we get a short packet there are 2 possibilities. We can
3530          * return an error, or fix up the response to look like a valid
3531          * response and return what we have so far. If there are no
3532          * entries and the packet was short, then return -EIO. If there
3533          * are valid entries in the response, return them and pretend that
3534          * the call was successful, but incomplete. The caller can retry the
3535          * readdir starting at the last cookie.
3536          */
3537         dprintk("%s: short packet at entry %d\n", __func__, nr);
3538         entry[0] = entry[1] = 0;
3539         if (nr)
3540                 goto out;
3541 err_unmap:
3542         kunmap_atomic(kaddr, KM_USER0);
3543         return -errno_NFSERR_IO;
3544 }
3545
3546 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3547 {
3548         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3549         struct kvec *iov = rcvbuf->head;
3550         size_t hdrlen;
3551         u32 len, recvd;
3552         __be32 *p;
3553         char *kaddr;
3554         int status;
3555
3556         status = decode_op_hdr(xdr, OP_READLINK);
3557         if (status)
3558                 return status;
3559
3560         /* Convert length of symlink */
3561         READ_BUF(4);
3562         READ32(len);
3563         if (len >= rcvbuf->page_len || len <= 0) {
3564                 dprintk("nfs: server returned giant symlink!\n");
3565                 return -ENAMETOOLONG;
3566         }
3567         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3568         recvd = req->rq_rcv_buf.len - hdrlen;
3569         if (recvd < len) {
3570                 dprintk("NFS: server cheating in readlink reply: "
3571                                 "count %u > recvd %u\n", len, recvd);
3572                 return -EIO;
3573         }
3574         xdr_read_pages(xdr, len);
3575         /*
3576          * The XDR encode routine has set things up so that
3577          * the link text will be copied directly into the
3578          * buffer.  We just have to do overflow-checking,
3579          * and and null-terminate the text (the VFS expects
3580          * null-termination).
3581          */
3582         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3583         kaddr[len+rcvbuf->page_base] = '\0';
3584         kunmap_atomic(kaddr, KM_USER0);
3585         return 0;
3586 }
3587
3588 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3589 {
3590         int status;
3591
3592         status = decode_op_hdr(xdr, OP_REMOVE);
3593         if (status)
3594                 goto out;
3595         status = decode_change_info(xdr, cinfo);
3596 out:
3597         return status;
3598 }
3599
3600 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3601               struct nfs4_change_info *new_cinfo)
3602 {
3603         int status;
3604
3605         status = decode_op_hdr(xdr, OP_RENAME);
3606         if (status)
3607                 goto out;
3608         if ((status = decode_change_info(xdr, old_cinfo)))
3609                 goto out;
3610         status = decode_change_info(xdr, new_cinfo);
3611 out:
3612         return status;
3613 }
3614
3615 static int decode_renew(struct xdr_stream *xdr)
3616 {
3617         return decode_op_hdr(xdr, OP_RENEW);
3618 }
3619
3620 static int
3621 decode_restorefh(struct xdr_stream *xdr)
3622 {
3623         return decode_op_hdr(xdr, OP_RESTOREFH);
3624 }
3625
3626 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3627                 size_t *acl_len)
3628 {
3629         __be32 *savep;
3630         uint32_t attrlen,
3631                  bitmap[2] = {0};
3632         struct kvec *iov = req->rq_rcv_buf.head;
3633         int status;
3634
3635         *acl_len = 0;
3636         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3637                 goto out;
3638         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3639                 goto out;
3640         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3641                 goto out;
3642
3643         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3646                 size_t hdrlen;
3647                 u32 recvd;
3648
3649                 /* We ignore &savep and don't do consistency checks on
3650                  * the attr length.  Let userspace figure it out.... */
3651                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3652                 recvd = req->rq_rcv_buf.len - hdrlen;
3653                 if (attrlen > recvd) {
3654                         dprintk("NFS: server cheating in getattr"
3655                                         " acl reply: attrlen %u > recvd %u\n",
3656                                         attrlen, recvd);
3657                         return -EINVAL;
3658                 }
3659                 xdr_read_pages(xdr, attrlen);
3660                 *acl_len = attrlen;
3661         } else
3662                 status = -EOPNOTSUPP;
3663
3664 out:
3665         return status;
3666 }
3667
3668 static int
3669 decode_savefh(struct xdr_stream *xdr)
3670 {
3671         return decode_op_hdr(xdr, OP_SAVEFH);
3672 }
3673
3674 static int decode_setattr(struct xdr_stream *xdr)
3675 {
3676         __be32 *p;
3677         uint32_t bmlen;
3678         int status;
3679
3680         status = decode_op_hdr(xdr, OP_SETATTR);
3681         if (status)
3682                 return status;
3683         READ_BUF(4);
3684         READ32(bmlen);
3685         READ_BUF(bmlen << 2);
3686         return 0;
3687 }
3688
3689 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3690 {
3691         __be32 *p;
3692         uint32_t opnum;
3693         int32_t nfserr;
3694
3695         READ_BUF(8);
3696         READ32(opnum);
3697         if (opnum != OP_SETCLIENTID) {
3698                 dprintk("nfs: decode_setclientid: Server returned operation"
3699                         " %d\n", opnum);
3700                 return -EIO;
3701         }
3702         READ32(nfserr);
3703         if (nfserr == NFS_OK) {
3704                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3705                 READ64(clp->cl_clientid);
3706                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3707         } else if (nfserr == NFSERR_CLID_INUSE) {
3708                 uint32_t len;
3709
3710                 /* skip netid string */
3711                 READ_BUF(4);
3712                 READ32(len);
3713                 READ_BUF(len);
3714
3715                 /* skip uaddr string */
3716                 READ_BUF(4);
3717                 READ32(len);
3718                 READ_BUF(len);
3719                 return -NFSERR_CLID_INUSE;
3720         } else
3721                 return nfs4_stat_to_errno(nfserr);
3722
3723         return 0;
3724 }
3725
3726 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3727 {
3728         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3729 }
3730
3731 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3732 {
3733         __be32 *p;
3734         int status;
3735
3736         status = decode_op_hdr(xdr, OP_WRITE);
3737         if (status)
3738                 return status;
3739
3740         READ_BUF(16);
3741         READ32(res->count);
3742         READ32(res->verf->committed);
3743         COPYMEM(res->verf->verifier, 8);
3744         return 0;
3745 }
3746
3747 static int decode_delegreturn(struct xdr_stream *xdr)
3748 {
3749         return decode_op_hdr(xdr, OP_DELEGRETURN);
3750 }
3751
3752 /*
3753  * END OF "GENERIC" DECODE ROUTINES.
3754  */
3755
3756 /*
3757  * Decode OPEN_DOWNGRADE response
3758  */
3759 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3760 {
3761         struct xdr_stream xdr;
3762         struct compound_hdr hdr;
3763         int status;
3764
3765         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3766         status = decode_compound_hdr(&xdr, &hdr);
3767         if (status)
3768                 goto out;
3769         status = decode_putfh(&xdr);
3770         if (status)
3771                 goto out;
3772         status = decode_open_downgrade(&xdr, res);
3773         if (status != 0)
3774                 goto out;
3775         decode_getfattr(&xdr, res->fattr, res->server);
3776 out:
3777         return status;
3778 }
3779
3780 /*
3781  * Decode ACCESS response
3782  */
3783 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3784 {
3785         struct xdr_stream xdr;
3786         struct compound_hdr hdr;
3787         int status;
3788
3789         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3790         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3791                 goto out;
3792         status = decode_putfh(&xdr);
3793         if (status != 0)
3794                 goto out;
3795         status = decode_access(&xdr, res);
3796         if (status != 0)
3797                 goto out;
3798         decode_getfattr(&xdr, res->fattr, res->server);
3799 out:
3800         return status;
3801 }
3802
3803 /*
3804  * Decode LOOKUP response
3805  */
3806 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3807 {
3808         struct xdr_stream xdr;
3809         struct compound_hdr hdr;
3810         int status;
3811
3812         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3813         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3814                 goto out;
3815         if ((status = decode_putfh(&xdr)) != 0)
3816                 goto out;
3817         if ((status = decode_lookup(&xdr)) != 0)
3818                 goto out;
3819         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3820                 goto out;
3821         status = decode_getfattr(&xdr, res->fattr, res->server);
3822 out:
3823         return status;
3824 }
3825
3826 /*
3827  * Decode LOOKUP_ROOT response
3828  */
3829 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3830 {
3831         struct xdr_stream xdr;
3832         struct compound_hdr hdr;
3833         int status;
3834
3835         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3836         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3837                 goto out;
3838         if ((status = decode_putrootfh(&xdr)) != 0)
3839                 goto out;
3840         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3841                 status = decode_getfattr(&xdr, res->fattr, res->server);
3842 out:
3843         return status;
3844 }
3845
3846 /*
3847  * Decode REMOVE response
3848  */
3849 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3850 {
3851         struct xdr_stream xdr;
3852         struct compound_hdr hdr;
3853         int status;
3854
3855         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3856         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3857                 goto out;
3858         if ((status = decode_putfh(&xdr)) != 0)
3859                 goto out;
3860         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3861                 goto out;
3862         decode_getfattr(&xdr, &res->dir_attr, res->server);
3863 out:
3864         return status;
3865 }
3866
3867 /*
3868  * Decode RENAME response
3869  */
3870 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3871 {
3872         struct xdr_stream xdr;
3873         struct compound_hdr hdr;
3874         int status;
3875
3876         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3877         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3878                 goto out;
3879         if ((status = decode_putfh(&xdr)) != 0)
3880                 goto out;
3881         if ((status = decode_savefh(&xdr)) != 0)
3882                 goto out;
3883         if ((status = decode_putfh(&xdr)) != 0)
3884                 goto out;
3885         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3886                 goto out;
3887         /* Current FH is target directory */
3888         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3889                 goto out;
3890         if ((status = decode_restorefh(&xdr)) != 0)
3891                 goto out;
3892         decode_getfattr(&xdr, res->old_fattr, res->server);
3893 out:
3894         return status;
3895 }
3896
3897 /*
3898  * Decode LINK response
3899  */
3900 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3901 {
3902         struct xdr_stream xdr;
3903         struct compound_hdr hdr;
3904         int status;
3905
3906         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3907         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3908                 goto out;
3909         if ((status = decode_putfh(&xdr)) != 0)
3910                 goto out;
3911         if ((status = decode_savefh(&xdr)) != 0)
3912                 goto out;
3913         if ((status = decode_putfh(&xdr)) != 0)
3914                 goto out;
3915         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3916                 goto out;
3917         /*
3918          * Note order: OP_LINK leaves the directory as the current
3919          *             filehandle.
3920          */
3921         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3922                 goto out;
3923         if ((status = decode_restorefh(&xdr)) != 0)
3924                 goto out;
3925         decode_getfattr(&xdr, res->fattr, res->server);
3926 out:
3927         return status;
3928 }
3929
3930 /*
3931  * Decode CREATE response
3932  */
3933 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3934 {
3935         struct xdr_stream xdr;
3936         struct compound_hdr hdr;
3937         int status;
3938
3939         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3940         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3941                 goto out;
3942         if ((status = decode_putfh(&xdr)) != 0)
3943                 goto out;
3944         if ((status = decode_savefh(&xdr)) != 0)
3945                 goto out;
3946         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3947                 goto out;
3948         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3949                 goto out;
3950         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3951                 goto out;
3952         if ((status = decode_restorefh(&xdr)) != 0)
3953                 goto out;
3954         decode_getfattr(&xdr, res->dir_fattr, res->server);
3955 out:
3956         return status;
3957 }
3958
3959 /*
3960  * Decode SYMLINK response
3961  */
3962 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3963 {
3964         return nfs4_xdr_dec_create(rqstp, p, res);
3965 }
3966
3967 /*
3968  * Decode GETATTR response
3969  */
3970 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3971 {
3972         struct xdr_stream xdr;
3973         struct compound_hdr hdr;
3974         int status;
3975
3976         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3977         status = decode_compound_hdr(&xdr, &hdr);
3978         if (status)
3979                 goto out;
3980         status = decode_putfh(&xdr);
3981         if (status)
3982                 goto out;
3983         status = decode_getfattr(&xdr, res->fattr, res->server);
3984 out:
3985         return status;
3986 }
3987
3988 /*
3989  * Encode an SETACL request
3990  */
3991 static int
3992 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3993 {
3994         struct xdr_stream xdr;
3995         struct compound_hdr hdr = {
3996                 .nops   = 0,
3997         };
3998         int status;
3999
4000         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4001         encode_compound_hdr(&xdr, req, &hdr);
4002         encode_putfh(&xdr, args->fh, &hdr);
4003         status = encode_setacl(&xdr, args, &hdr);
4004         encode_nops(&hdr);
4005         return status;
4006 }
4007
4008 /*
4009  * Decode SETACL response
4010  */
4011 static int
4012 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4013                     struct nfs_setaclres *res)
4014 {
4015         struct xdr_stream xdr;
4016         struct compound_hdr hdr;
4017         int status;
4018
4019         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4020         status = decode_compound_hdr(&xdr, &hdr);
4021         if (status)
4022                 goto out;
4023         status = decode_putfh(&xdr);
4024         if (status)
4025                 goto out;
4026         status = decode_setattr(&xdr);
4027 out:
4028         return status;
4029 }
4030
4031 /*
4032  * Decode GETACL response
4033  */
4034 static int
4035 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4036                     struct nfs_getaclres *res)
4037 {
4038         struct xdr_stream xdr;
4039         struct compound_hdr hdr;
4040         int status;
4041
4042         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4043         status = decode_compound_hdr(&xdr, &hdr);
4044         if (status)
4045                 goto out;
4046         status = decode_putfh(&xdr);
4047         if (status)
4048                 goto out;
4049         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4050
4051 out:
4052         return status;
4053 }
4054
4055 /*
4056  * Decode CLOSE response
4057  */
4058 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4059 {
4060         struct xdr_stream xdr;
4061         struct compound_hdr hdr;
4062         int status;
4063
4064         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4065         status = decode_compound_hdr(&xdr, &hdr);
4066         if (status)
4067                 goto out;
4068         status = decode_putfh(&xdr);
4069         if (status)
4070                 goto out;
4071         status = decode_close(&xdr, res);
4072         if (status != 0)
4073                 goto out;
4074         /*
4075          * Note: Server may do delete on close for this file
4076          *      in which case the getattr call will fail with
4077          *      an ESTALE error. Shouldn't be a problem,
4078          *      though, since fattr->valid will remain unset.
4079          */
4080         decode_getfattr(&xdr, res->fattr, res->server);
4081 out:
4082         return status;
4083 }
4084
4085 /*
4086  * Decode OPEN response
4087  */
4088 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4089 {
4090         struct xdr_stream xdr;
4091         struct compound_hdr hdr;
4092         int status;
4093
4094         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4095         status = decode_compound_hdr(&xdr, &hdr);
4096         if (status)
4097                 goto out;
4098         status = decode_putfh(&xdr);
4099         if (status)
4100                 goto out;
4101         status = decode_savefh(&xdr);
4102         if (status)
4103                 goto out;
4104         status = decode_open(&xdr, res);
4105         if (status)
4106                 goto out;
4107         if (decode_getfh(&xdr, &res->fh) != 0)
4108                 goto out;
4109         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4110                 goto out;
4111         if (decode_restorefh(&xdr) != 0)
4112                 goto out;
4113         decode_getfattr(&xdr, res->dir_attr, res->server);
4114 out:
4115         return status;
4116 }
4117
4118 /*
4119  * Decode OPEN_CONFIRM response
4120  */
4121 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4122 {
4123         struct xdr_stream xdr;
4124         struct compound_hdr hdr;
4125         int status;
4126
4127         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4128         status = decode_compound_hdr(&xdr, &hdr);
4129         if (status)
4130                 goto out;
4131         status = decode_putfh(&xdr);
4132         if (status)
4133                 goto out;
4134         status = decode_open_confirm(&xdr, res);
4135 out:
4136         return status;
4137 }
4138
4139 /*
4140  * Decode OPEN response
4141  */
4142 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4143 {
4144         struct xdr_stream xdr;
4145         struct compound_hdr hdr;
4146         int status;
4147
4148         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4149         status = decode_compound_hdr(&xdr, &hdr);
4150         if (status)
4151                 goto out;
4152         status = decode_putfh(&xdr);
4153         if (status)
4154                 goto out;
4155         status = decode_open(&xdr, res);
4156         if (status)
4157                 goto out;
4158         decode_getfattr(&xdr, res->f_attr, res->server);
4159 out:
4160         return status;
4161 }
4162
4163 /*
4164  * Decode SETATTR response
4165  */
4166 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4167 {
4168         struct xdr_stream xdr;
4169         struct compound_hdr hdr;
4170         int status;
4171
4172         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4173         status = decode_compound_hdr(&xdr, &hdr);
4174         if (status)
4175                 goto out;
4176         status = decode_putfh(&xdr);
4177         if (status)
4178                 goto out;
4179         status = decode_setattr(&xdr);
4180         if (status)
4181                 goto out;
4182         decode_getfattr(&xdr, res->fattr, res->server);
4183 out:
4184         return status;
4185 }
4186
4187 /*
4188  * Decode LOCK response
4189  */
4190 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4191 {
4192         struct xdr_stream xdr;
4193         struct compound_hdr hdr;
4194         int status;
4195
4196         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4197         status = decode_compound_hdr(&xdr, &hdr);
4198         if (status)
4199                 goto out;
4200         status = decode_putfh(&xdr);
4201         if (status)
4202                 goto out;
4203         status = decode_lock(&xdr, res);
4204 out:
4205         return status;
4206 }
4207
4208 /*
4209  * Decode LOCKT response
4210  */
4211 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4212 {
4213         struct xdr_stream xdr;
4214         struct compound_hdr hdr;
4215         int status;
4216
4217         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4218         status = decode_compound_hdr(&xdr, &hdr);
4219         if (status)
4220                 goto out;
4221         status = decode_putfh(&xdr);
4222         if (status)
4223                 goto out;
4224         status = decode_lockt(&xdr, res);
4225 out:
4226         return status;
4227 }
4228
4229 /*
4230  * Decode LOCKU response
4231  */
4232 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4233 {
4234         struct xdr_stream xdr;
4235         struct compound_hdr hdr;
4236         int status;
4237
4238         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4239         status = decode_compound_hdr(&xdr, &hdr);
4240         if (status)
4241                 goto out;
4242         status = decode_putfh(&xdr);
4243         if (status)
4244                 goto out;
4245         status = decode_locku(&xdr, res);
4246 out:
4247         return status;
4248 }
4249
4250 /*
4251  * Decode READLINK response
4252  */
4253 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4254                                  struct nfs4_readlink_res *res)
4255 {
4256         struct xdr_stream xdr;
4257         struct compound_hdr hdr;
4258         int status;
4259
4260         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4261         status = decode_compound_hdr(&xdr, &hdr);
4262         if (status)
4263                 goto out;
4264         status = decode_putfh(&xdr);
4265         if (status)
4266                 goto out;
4267         status = decode_readlink(&xdr, rqstp);
4268 out:
4269         return status;
4270 }
4271
4272 /*
4273  * Decode READDIR response
4274  */
4275 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4276 {
4277         struct xdr_stream xdr;
4278         struct compound_hdr hdr;
4279         int status;
4280
4281         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4282         status = decode_compound_hdr(&xdr, &hdr);
4283         if (status)
4284                 goto out;
4285         status = decode_putfh(&xdr);
4286         if (status)
4287                 goto out;
4288         status = decode_readdir(&xdr, rqstp, res);
4289 out:
4290         return status;
4291 }
4292
4293 /*
4294  * Decode Read response
4295  */
4296 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4297 {
4298         struct xdr_stream xdr;
4299         struct compound_hdr hdr;
4300         int status;
4301
4302         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4303         status = decode_compound_hdr(&xdr, &hdr);
4304         if (status)
4305                 goto out;
4306         status = decode_putfh(&xdr);
4307         if (status)
4308                 goto out;
4309         status = decode_read(&xdr, rqstp, res);
4310         if (!status)
4311                 status = res->count;
4312 out:
4313         return status;
4314 }
4315
4316 /*
4317  * Decode WRITE response
4318  */
4319 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4320 {
4321         struct xdr_stream xdr;
4322         struct compound_hdr hdr;
4323         int status;
4324
4325         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4326         status = decode_compound_hdr(&xdr, &hdr);
4327         if (status)
4328                 goto out;
4329         status = decode_putfh(&xdr);
4330         if (status)
4331                 goto out;
4332         status = decode_write(&xdr, res);
4333         if (status)
4334                 goto out;
4335         decode_getfattr(&xdr, res->fattr, res->server);
4336         if (!status)
4337                 status = res->count;
4338 out:
4339         return status;
4340 }
4341
4342 /*
4343  * Decode COMMIT response
4344  */
4345 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4346 {
4347         struct xdr_stream xdr;
4348         struct compound_hdr hdr;
4349         int status;
4350
4351         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4352         status = decode_compound_hdr(&xdr, &hdr);
4353         if (status)
4354                 goto out;
4355         status = decode_putfh(&xdr);
4356         if (status)
4357                 goto out;
4358         status = decode_commit(&xdr, res);
4359         if (status)
4360                 goto out;
4361         decode_getfattr(&xdr, res->fattr, res->server);
4362 out:
4363         return status;
4364 }
4365
4366 /*
4367  * FSINFO request
4368  */
4369 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
4370                                struct nfs4_fsinfo_res *res)
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_fsinfo(&xdr, res->fsinfo);
4382         return status;
4383 }
4384
4385 /*
4386  * PATHCONF request
4387  */
4388 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
4389                                  struct nfs4_pathconf_res *res)
4390 {
4391         struct xdr_stream xdr;
4392         struct compound_hdr hdr;
4393         int status;
4394
4395         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4396         status = decode_compound_hdr(&xdr, &hdr);
4397         if (!status)
4398                 status = decode_putfh(&xdr);
4399         if (!status)
4400                 status = decode_pathconf(&xdr, res->pathconf);
4401         return status;
4402 }
4403
4404 /*
4405  * STATFS request
4406  */
4407 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
4408                                struct nfs4_statfs_res *res)
4409 {
4410         struct xdr_stream xdr;
4411         struct compound_hdr hdr;
4412         int status;
4413
4414         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4415         status = decode_compound_hdr(&xdr, &hdr);
4416         if (!status)
4417                 status = decode_putfh(&xdr);
4418         if (!status)
4419                 status = decode_statfs(&xdr, res->fsstat);
4420         return status;
4421 }
4422
4423 /*
4424  * GETATTR_BITMAP request
4425  */
4426 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4427 {
4428         struct xdr_stream xdr;
4429         struct compound_hdr hdr;
4430         int status;
4431
4432         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4433         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4434                 goto out;
4435         if ((status = decode_putfh(&xdr)) != 0)
4436                 goto out;
4437         status = decode_server_caps(&xdr, res);
4438 out:
4439         return status;
4440 }
4441
4442 /*
4443  * Decode RENEW response
4444  */
4445 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4446 {
4447         struct xdr_stream xdr;
4448         struct compound_hdr hdr;
4449         int status;
4450
4451         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4452         status = decode_compound_hdr(&xdr, &hdr);
4453         if (!status)
4454                 status = decode_renew(&xdr);
4455         return status;
4456 }
4457
4458 /*
4459  * a SETCLIENTID request
4460  */
4461 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4462                 struct nfs_client *clp)
4463 {
4464         struct xdr_stream xdr;
4465         struct compound_hdr hdr;
4466         int status;
4467
4468         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4469         status = decode_compound_hdr(&xdr, &hdr);
4470         if (!status)
4471                 status = decode_setclientid(&xdr, clp);
4472         return status;
4473 }
4474
4475 /*
4476  * a SETCLIENTID_CONFIRM request
4477  */
4478 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4479 {
4480         struct xdr_stream xdr;
4481         struct compound_hdr hdr;
4482         int status;
4483
4484         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4485         status = decode_compound_hdr(&xdr, &hdr);
4486         if (!status)
4487                 status = decode_setclientid_confirm(&xdr);
4488         if (!status)
4489                 status = decode_putrootfh(&xdr);
4490         if (!status)
4491                 status = decode_fsinfo(&xdr, fsinfo);
4492         return status;
4493 }
4494
4495 /*
4496  * DELEGRETURN request
4497  */
4498 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4499 {
4500         struct xdr_stream xdr;
4501         struct compound_hdr hdr;
4502         int status;
4503
4504         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4505         status = decode_compound_hdr(&xdr, &hdr);
4506         if (status != 0)
4507                 goto out;
4508         status = decode_putfh(&xdr);
4509         if (status != 0)
4510                 goto out;
4511         status = decode_delegreturn(&xdr);
4512         decode_getfattr(&xdr, res->fattr, res->server);
4513 out:
4514         return status;
4515 }
4516
4517 /*
4518  * FS_LOCATIONS request
4519  */
4520 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
4521                                      struct nfs4_fs_locations_res *res)
4522 {
4523         struct xdr_stream xdr;
4524         struct compound_hdr hdr;
4525         int status;
4526
4527         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4528         status = decode_compound_hdr(&xdr, &hdr);
4529         if (status != 0)
4530                 goto out;
4531         if ((status = decode_putfh(&xdr)) != 0)
4532                 goto out;
4533         if ((status = decode_lookup(&xdr)) != 0)
4534                 goto out;
4535         xdr_enter_page(&xdr, PAGE_SIZE);
4536         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
4537                                  res->fs_locations->server);
4538 out:
4539         return status;
4540 }
4541
4542 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4543 {
4544         uint32_t bitmap[2] = {0};
4545         uint32_t len;
4546
4547         if (!*p++) {
4548                 if (!*p)
4549                         return ERR_PTR(-EAGAIN);
4550                 entry->eof = 1;
4551                 return ERR_PTR(-EBADCOOKIE);
4552         }
4553
4554         entry->prev_cookie = entry->cookie;
4555         p = xdr_decode_hyper(p, &entry->cookie);
4556         entry->len = ntohl(*p++);
4557         entry->name = (const char *) p;
4558         p += XDR_QUADLEN(entry->len);
4559
4560         /*
4561          * In case the server doesn't return an inode number,
4562          * we fake one here.  (We don't use inode number 0,
4563          * since glibc seems to choke on it...)
4564          */
4565         entry->ino = 1;
4566
4567         len = ntohl(*p++);              /* bitmap length */
4568         if (len-- > 0) {
4569                 bitmap[0] = ntohl(*p++);
4570                 if (len-- > 0) {
4571                         bitmap[1] = ntohl(*p++);
4572                         p += len;
4573                 }
4574         }
4575         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4576         if (len > 0) {
4577                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4578                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4579                         /* Ignore the return value of rdattr_error for now */
4580                         p++;
4581                         len--;
4582                 }
4583                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4584                         xdr_decode_hyper(p, &entry->ino);
4585                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4586                         xdr_decode_hyper(p, &entry->ino);
4587                 p += len;
4588         }
4589
4590         entry->eof = !p[0] && p[1];
4591         return p;
4592 }
4593
4594 /*
4595  * We need to translate between nfs status return values and
4596  * the local errno values which may not be the same.
4597  */
4598 static struct {
4599         int stat;
4600         int errno;
4601 } nfs_errtbl[] = {
4602         { NFS4_OK,              0               },
4603         { NFS4ERR_PERM,         -EPERM          },
4604         { NFS4ERR_NOENT,        -ENOENT         },
4605         { NFS4ERR_IO,           -errno_NFSERR_IO},
4606         { NFS4ERR_NXIO,         -ENXIO          },
4607         { NFS4ERR_ACCESS,       -EACCES         },
4608         { NFS4ERR_EXIST,        -EEXIST         },
4609         { NFS4ERR_XDEV,         -EXDEV          },
4610         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4611         { NFS4ERR_ISDIR,        -EISDIR         },
4612         { NFS4ERR_INVAL,        -EINVAL         },
4613         { NFS4ERR_FBIG,         -EFBIG          },
4614         { NFS4ERR_NOSPC,        -ENOSPC         },
4615         { NFS4ERR_ROFS,         -EROFS          },
4616         { NFS4ERR_MLINK,        -EMLINK         },
4617         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4618         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4619         { NFS4ERR_DQUOT,        -EDQUOT         },
4620         { NFS4ERR_STALE,        -ESTALE         },
4621         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4622         { NFS4ERR_BADOWNER,     -EINVAL         },
4623         { NFS4ERR_BADNAME,      -EINVAL         },
4624         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4625         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4626         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4627         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4628         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4629         { NFS4ERR_LOCKED,       -EAGAIN         },
4630         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4631         { NFS4ERR_SYMLINK,      -ELOOP          },
4632         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4633         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4634         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4635                                                     * to be handled by a
4636                                                     * middle-layer.
4637                                                     */
4638         { -1,                   -EIO            }
4639 };
4640
4641 /*
4642  * Convert an NFS error code to a local one.
4643  * This one is used jointly by NFSv2 and NFSv3.
4644  */
4645 static int
4646 nfs4_stat_to_errno(int stat)
4647 {
4648         int i;
4649         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4650                 if (nfs_errtbl[i].stat == stat)
4651                         return nfs_errtbl[i].errno;
4652         }
4653         if (stat <= 10000 || stat > 10100) {
4654                 /* The server is looney tunes. */
4655                 return -ESERVERFAULT;
4656         }
4657         /* If we cannot translate the error, the recovery routines should
4658          * handle it.
4659          * Note: remaining NFSv4 error codes have values > 10000, so should
4660          * not conflict with native Linux error codes.
4661          */
4662         return -stat;
4663 }
4664
4665 #define PROC(proc, argtype, restype)                            \
4666 [NFSPROC4_CLNT_##proc] = {                                      \
4667         .p_proc   = NFSPROC4_COMPOUND,                          \
4668         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4669         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4670         .p_arglen = NFS4_##argtype##_sz,                        \
4671         .p_replen = NFS4_##restype##_sz,                        \
4672         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4673         .p_name   = #proc,                                      \
4674 }
4675
4676 struct rpc_procinfo     nfs4_procedures[] = {
4677   PROC(READ,            enc_read,       dec_read),
4678   PROC(WRITE,           enc_write,      dec_write),
4679   PROC(COMMIT,          enc_commit,     dec_commit),
4680   PROC(OPEN,            enc_open,       dec_open),
4681   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4682   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4683   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4684   PROC(CLOSE,           enc_close,      dec_close),
4685   PROC(SETATTR,         enc_setattr,    dec_setattr),
4686   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4687   PROC(RENEW,           enc_renew,      dec_renew),
4688   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4689   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4690   PROC(LOCK,            enc_lock,       dec_lock),
4691   PROC(LOCKT,           enc_lockt,      dec_lockt),
4692   PROC(LOCKU,           enc_locku,      dec_locku),
4693   PROC(ACCESS,          enc_access,     dec_access),
4694   PROC(GETATTR,         enc_getattr,    dec_getattr),
4695   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4696   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4697   PROC(REMOVE,          enc_remove,     dec_remove),
4698   PROC(RENAME,          enc_rename,     dec_rename),
4699   PROC(LINK,            enc_link,       dec_link),
4700   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4701   PROC(CREATE,          enc_create,     dec_create),
4702   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4703   PROC(STATFS,          enc_statfs,     dec_statfs),
4704   PROC(READLINK,        enc_readlink,   dec_readlink),
4705   PROC(READDIR,         enc_readdir,    dec_readdir),
4706   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4707   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4708   PROC(GETACL,          enc_getacl,     dec_getacl),
4709   PROC(SETACL,          enc_setacl,     dec_setacl),
4710   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4711 };
4712
4713 struct rpc_version              nfs_version4 = {
4714         .number                 = 4,
4715         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4716         .procs                  = nfs4_procedures
4717 };
4718
4719 /*
4720  * Local variables:
4721  *  c-basic-offset: 8
4722  * End:
4723  */