git.oblomov.eu Git - linux-2.6/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 196                                 2 * nfs4_name_maxsz)
 197 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 198 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 199                                 nfs4_name_maxsz)
 200 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 201 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 202                                  7 + \
 203                                  1 + encode_stateid_maxsz + 8)
 204 #define decode_lock_denied_maxsz \
 205                                 (8 + decode_lockowner_maxsz)
 206 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 207                                  decode_lock_denied_maxsz)
 208 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 209 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 212                                  encode_stateid_maxsz + \
 213                                  4)
 214 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_stateid_maxsz)
 216 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 217 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 218 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 219                                 1 + nfs4_name_maxsz + \
 220                                 1 + \
 221                                 nfs4_fattr_maxsz)
 222 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 223 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 224                                 1 + 2 + nfs4_name_maxsz + \
 225                                 encode_attrs_maxsz)
 226 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 nfs4_fattr_bitmap_maxsz)
 229 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 230 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 233 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 234 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 235                                  nfs4_fattr_bitmap_maxsz + 1)
 236 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 237                                  encode_stateid_maxsz + 3)
 238 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 239 #define encode_fs_locations_maxsz \
 240                                 (encode_getattr_maxsz)
 241 #define decode_fs_locations_maxsz \
 242                                 (0)
 243 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 244 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 245 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 246                                 encode_putfh_maxsz + \
 247                                 encode_read_maxsz)
 248 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 249                                 decode_putfh_maxsz + \
 250                                 decode_read_maxsz)
 251 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 252                                 encode_putfh_maxsz + \
 253                                 encode_readlink_maxsz)
 254 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 decode_readlink_maxsz)
 257 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 258                                 encode_putfh_maxsz + \
 259                                 encode_readdir_maxsz)
 260 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_readdir_maxsz)
 263 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 264                                 encode_putfh_maxsz + \
 265                                 encode_write_maxsz + \
 266                                 encode_getattr_maxsz)
 267 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_write_maxsz + \
 270                                 decode_getattr_maxsz)
 271 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 encode_commit_maxsz + \
 274                                 encode_getattr_maxsz)
 275 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 276                                 decode_putfh_maxsz + \
 277                                 decode_commit_maxsz + \
 278                                 decode_getattr_maxsz)
 279 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_putfh_maxsz + \
 281                                 encode_savefh_maxsz + \
 282                                 encode_open_maxsz + \
 283                                 encode_getfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 encode_restorefh_maxsz + \
 286                                 encode_getattr_maxsz)
 287 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 288                                 decode_putfh_maxsz + \
 289                                 decode_savefh_maxsz + \
 290                                 decode_open_maxsz + \
 291                                 decode_getfh_maxsz + \
 292                                 decode_getattr_maxsz + \
 293                                 decode_restorefh_maxsz + \
 294                                 decode_getattr_maxsz)
 295 #define NFS4_enc_open_confirm_sz \
 296                                 (compound_encode_hdr_maxsz + \
 297                                  encode_putfh_maxsz + \
 298                                  encode_open_confirm_maxsz)
 299 #define NFS4_dec_open_confirm_sz \
 300                                 (compound_decode_hdr_maxsz + \
 301                                  decode_putfh_maxsz + \
 302                                  decode_open_confirm_maxsz)
 303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 304                                         encode_putfh_maxsz + \
 305                                         encode_open_maxsz + \
 306                                         encode_getattr_maxsz)
 307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 308                                         decode_putfh_maxsz + \
 309                                         decode_open_maxsz + \
 310                                         decode_getattr_maxsz)
 311 #define NFS4_enc_open_downgrade_sz \
 312                                 (compound_encode_hdr_maxsz + \
 313                                  encode_putfh_maxsz + \
 314                                  encode_open_downgrade_maxsz + \
 315                                  encode_getattr_maxsz)
 316 #define NFS4_dec_open_downgrade_sz \
 317                                 (compound_decode_hdr_maxsz + \
 318                                  decode_putfh_maxsz + \
 319                                  decode_open_downgrade_maxsz + \
 320                                  decode_getattr_maxsz)
 321 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 322                                  encode_putfh_maxsz + \
 323                                  encode_close_maxsz + \
 324                                  encode_getattr_maxsz)
 325 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 326                                  decode_putfh_maxsz + \
 327                                  decode_close_maxsz + \
 328                                  decode_getattr_maxsz)
 329 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 330                                  encode_putfh_maxsz + \
 331                                  encode_setattr_maxsz + \
 332                                  encode_getattr_maxsz)
 333 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 334                                  decode_putfh_maxsz + \
 335                                  decode_setattr_maxsz + \
 336                                  decode_getattr_maxsz)
 337 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_fsinfo_maxsz)
 340 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_fsinfo_maxsz)
 343 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 344                                 encode_renew_maxsz)
 345 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 346                                 decode_renew_maxsz)
 347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 348                                 encode_setclientid_maxsz)
 349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 350                                 decode_setclientid_maxsz)
 351 #define NFS4_enc_setclientid_confirm_sz \
 352                                 (compound_encode_hdr_maxsz + \
 353                                 encode_setclientid_confirm_maxsz + \
 354                                 encode_putrootfh_maxsz + \
 355                                 encode_fsinfo_maxsz)
 356 #define NFS4_dec_setclientid_confirm_sz \
 357                                 (compound_decode_hdr_maxsz + \
 358                                 decode_setclientid_confirm_maxsz + \
 359                                 decode_putrootfh_maxsz + \
 360                                 decode_fsinfo_maxsz)
 361 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_lock_maxsz)
 364 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_lock_maxsz)
 367 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_lockt_maxsz)
 370 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 371                                  decode_putfh_maxsz + \
 372                                  decode_lockt_maxsz)
 373 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_putfh_maxsz + \
 375                                 encode_locku_maxsz)
 376 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_locku_maxsz)
 379 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_access_maxsz + \
 382                                 encode_getattr_maxsz)
 383 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_access_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_getattr_maxsz)
 390 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 391                                 decode_putfh_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_lookup_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_getfh_maxsz)
 398 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 399                                 decode_putfh_maxsz + \
 400                                 decode_lookup_maxsz + \
 401                                 decode_getattr_maxsz + \
 402                                 decode_getfh_maxsz)
 403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 404                                 encode_putrootfh_maxsz + \
 405                                 encode_getattr_maxsz + \
 406                                 encode_getfh_maxsz)
 407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 408                                 decode_putrootfh_maxsz + \
 409                                 decode_getattr_maxsz + \
 410                                 decode_getfh_maxsz)
 411 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_remove_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_putfh_maxsz + \
 417                                 op_decode_hdr_maxsz + 5 + \
 418                                 decode_getattr_maxsz)
 419 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_savefh_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_rename_maxsz + \
 424                                 encode_getattr_maxsz + \
 425                                 encode_restorefh_maxsz + \
 426                                 encode_getattr_maxsz)
 427 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_savefh_maxsz + \
 430                                 decode_putfh_maxsz + \
 431                                 decode_rename_maxsz + \
 432                                 decode_getattr_maxsz + \
 433                                 decode_restorefh_maxsz + \
 434                                 decode_getattr_maxsz)
 435 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 436                                 encode_putfh_maxsz + \
 437                                 encode_savefh_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_link_maxsz + \
 440                                 decode_getattr_maxsz + \
 441                                 encode_restorefh_maxsz + \
 442                                 decode_getattr_maxsz)
 443 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_savefh_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_link_maxsz + \
 448                                 decode_getattr_maxsz + \
 449                                 decode_restorefh_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_putfh_maxsz + \
 453                                 encode_symlink_maxsz + \
 454                                 encode_getattr_maxsz + \
 455                                 encode_getfh_maxsz)
 456 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_symlink_maxsz + \
 459                                 decode_getattr_maxsz + \
 460                                 decode_getfh_maxsz)
 461 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_savefh_maxsz + \
 464                                 encode_create_maxsz + \
 465                                 encode_getfh_maxsz + \
 466                                 encode_getattr_maxsz + \
 467                                 encode_restorefh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_savefh_maxsz + \
 472                                 decode_create_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz + \
 475                                 decode_restorefh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 478                                 encode_putfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_statfs_maxsz)
 486 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_statfs_maxsz)
 489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_getattr_maxsz)
 492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_getattr_maxsz)
 495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 496                                 encode_putfh_maxsz + \
 497                                 encode_delegreturn_maxsz + \
 498                                 encode_getattr_maxsz)
 499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 500                                 decode_delegreturn_maxsz + \
 501                                 decode_getattr_maxsz)
 502 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_putfh_maxsz + \
 504                                 encode_getacl_maxsz)
 505 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_getacl_maxsz)
 508 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_setacl_maxsz)
 511 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 512                                 decode_putfh_maxsz + \
 513                                 decode_setacl_maxsz)
 514 #define NFS4_enc_fs_locations_sz \
 515                                 (compound_encode_hdr_maxsz + \
 516                                  encode_putfh_maxsz + \
 517                                  encode_lookup_maxsz + \
 518                                  encode_fs_locations_maxsz)
 519 #define NFS4_dec_fs_locations_sz \
 520                                 (compound_decode_hdr_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_lookup_maxsz + \
 523                                  decode_fs_locations_maxsz)
 524
 525 static struct {
 526         unsigned int    mode;
 527         unsigned int    nfs2type;
 528 } nfs_type2fmt[] = {
 529         { 0,            NFNON        },
 530         { S_IFREG,      NFREG        },
 531         { S_IFDIR,      NFDIR        },
 532         { S_IFBLK,      NFBLK        },
 533         { S_IFCHR,      NFCHR        },
 534         { S_IFLNK,      NFLNK        },
 535         { S_IFSOCK,     NFSOCK       },
 536         { S_IFIFO,      NFFIFO       },
 537         { 0,            NFNON        },
 538         { 0,            NFNON        },
 539 };
 540
 541 struct compound_hdr {
 542         int32_t         status;
 543         uint32_t        nops;
 544         __be32 *        nops_p;
 545         uint32_t        taglen;
 546         char *          tag;
 547 };
 548
 549 /*
 550  * START OF "GENERIC" ENCODE ROUTINES.
 551  *   These may look a little ugly since they are imported from a "generic"
 552  * set of XDR encode/decode routines which are intended to be shared by
 553  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 554  *
 555  * If the pain of reading these is too great, it should be a straightforward
 556  * task to translate them into Linux-specific versions which are more
 557  * consistent with the style used in NFSv2/v3...
 558  */
 559 #define WRITE32(n)               *p++ = htonl(n)
 560 #define WRITE64(n)               do {                           \
 561         *p++ = htonl((uint32_t)((n) >> 32));                            \
 562         *p++ = htonl((uint32_t)(n));                                    \
 563 } while (0)
 564 #define WRITEMEM(ptr,nbytes)     do {                           \
 565         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 566 } while (0)
 567
 568 #define RESERVE_SPACE(nbytes)   do {                            \
 569         p = xdr_reserve_space(xdr, nbytes);                     \
 570         BUG_ON(!p);                                             \
 571 } while (0)
 572
 573 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 574 {
 575         __be32 *p;
 576
 577         p = xdr_reserve_space(xdr, 4 + len);
 578         BUG_ON(p == NULL);
 579         xdr_encode_opaque(p, str, len);
 580 }
 581
 582 static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 583 {
 584         __be32 *p;
 585
 586         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 587         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 588         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 589         WRITE32(hdr->taglen);
 590         WRITEMEM(hdr->tag, hdr->taglen);
 591         WRITE32(NFS4_MINOR_VERSION);
 592         hdr->nops_p = p;
 593         WRITE32(hdr->nops);
 594 }
 595
 596 static void encode_nops(struct compound_hdr *hdr)
 597 {
 598         *hdr->nops_p = htonl(hdr->nops);
 599 }
 600
 601 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 602 {
 603         __be32 *p;
 604
 605         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 606         BUG_ON(p == NULL);
 607         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 608 }
 609
 610 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 611 {
 612         char owner_name[IDMAP_NAMESZ];
 613         char owner_group[IDMAP_NAMESZ];
 614         int owner_namelen = 0;
 615         int owner_grouplen = 0;
 616         __be32 *p;
 617         __be32 *q;
 618         int len;
 619         uint32_t bmval0 = 0;
 620         uint32_t bmval1 = 0;
 621
 622         /*
 623          * We reserve enough space to write the entire attribute buffer at once.
 624          * In the worst-case, this would be
 625          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 626          *          = 36 bytes, plus any contribution from variable-length fields
 627          *            such as owner/group.
 628          */
 629         len = 16;
 630
 631         /* Sigh */
 632         if (iap->ia_valid & ATTR_SIZE)
 633                 len += 8;
 634         if (iap->ia_valid & ATTR_MODE)
 635                 len += 4;
 636         if (iap->ia_valid & ATTR_UID) {
 637                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 638                 if (owner_namelen < 0) {
 639                         dprintk("nfs: couldn't resolve uid %d to string\n",
 640                                         iap->ia_uid);
 641                         /* XXX */
 642                         strcpy(owner_name, "nobody");
 643                         owner_namelen = sizeof("nobody") - 1;
 644                         /* goto out; */
 645                 }
 646                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 647         }
 648         if (iap->ia_valid & ATTR_GID) {
 649                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 650                 if (owner_grouplen < 0) {
 651                         dprintk("nfs: couldn't resolve gid %d to string\n",
 652                                         iap->ia_gid);
 653                         strcpy(owner_group, "nobody");
 654                         owner_grouplen = sizeof("nobody") - 1;
 655                         /* goto out; */
 656                 }
 657                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 658         }
 659         if (iap->ia_valid & ATTR_ATIME_SET)
 660                 len += 16;
 661         else if (iap->ia_valid & ATTR_ATIME)
 662                 len += 4;
 663         if (iap->ia_valid & ATTR_MTIME_SET)
 664                 len += 16;
 665         else if (iap->ia_valid & ATTR_MTIME)
 666                 len += 4;
 667         RESERVE_SPACE(len);
 668
 669         /*
 670          * We write the bitmap length now, but leave the bitmap and the attribute
 671          * buffer length to be backfilled at the end of this routine.
 672          */
 673         WRITE32(2);
 674         q = p;
 675         p += 3;
 676
 677         if (iap->ia_valid & ATTR_SIZE) {
 678                 bmval0 |= FATTR4_WORD0_SIZE;
 679                 WRITE64(iap->ia_size);
 680         }
 681         if (iap->ia_valid & ATTR_MODE) {
 682                 bmval1 |= FATTR4_WORD1_MODE;
 683                 WRITE32(iap->ia_mode & S_IALLUGO);
 684         }
 685         if (iap->ia_valid & ATTR_UID) {
 686                 bmval1 |= FATTR4_WORD1_OWNER;
 687                 WRITE32(owner_namelen);
 688                 WRITEMEM(owner_name, owner_namelen);
 689         }
 690         if (iap->ia_valid & ATTR_GID) {
 691                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 692                 WRITE32(owner_grouplen);
 693                 WRITEMEM(owner_group, owner_grouplen);
 694         }
 695         if (iap->ia_valid & ATTR_ATIME_SET) {
 696                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 697                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 698                 WRITE32(0);
 699                 WRITE32(iap->ia_mtime.tv_sec);
 700                 WRITE32(iap->ia_mtime.tv_nsec);
 701         }
 702         else if (iap->ia_valid & ATTR_ATIME) {
 703                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 704                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 705         }
 706         if (iap->ia_valid & ATTR_MTIME_SET) {
 707                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 708                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 709                 WRITE32(0);
 710                 WRITE32(iap->ia_mtime.tv_sec);
 711                 WRITE32(iap->ia_mtime.tv_nsec);
 712         }
 713         else if (iap->ia_valid & ATTR_MTIME) {
 714                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 715                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 716         }
 717
 718         /*
 719          * Now we backfill the bitmap and the attribute buffer length.
 720          */
 721         if (len != ((char *)p - (char *)q) + 4) {
 722                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 723                                 len, ((char *)p - (char *)q) + 4);
 724                 BUG();
 725         }
 726         len = (char *)p - (char *)q - 12;
 727         *q++ = htonl(bmval0);
 728         *q++ = htonl(bmval1);
 729         *q++ = htonl(len);
 730
 731 /* out: */
 732 }
 733
 734 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 735 {
 736         __be32 *p;
 737
 738         RESERVE_SPACE(8);
 739         WRITE32(OP_ACCESS);
 740         WRITE32(access);
 741         hdr->nops++;
 742 }
 743
 744 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 745 {
 746         __be32 *p;
 747
 748         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 749         WRITE32(OP_CLOSE);
 750         WRITE32(arg->seqid->sequence->counter);
 751         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 752         hdr->nops++;
 753 }
 754
 755 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 756 {
 757         __be32 *p;
 758
 759         RESERVE_SPACE(16);
 760         WRITE32(OP_COMMIT);
 761         WRITE64(args->offset);
 762         WRITE32(args->count);
 763         hdr->nops++;
 764 }
 765
 766 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 767 {
 768         __be32 *p;
 769
 770         RESERVE_SPACE(8);
 771         WRITE32(OP_CREATE);
 772         WRITE32(create->ftype);
 773
 774         switch (create->ftype) {
 775         case NF4LNK:
 776                 RESERVE_SPACE(4);
 777                 WRITE32(create->u.symlink.len);
 778                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 779                 break;
 780
 781         case NF4BLK: case NF4CHR:
 782                 RESERVE_SPACE(8);
 783                 WRITE32(create->u.device.specdata1);
 784                 WRITE32(create->u.device.specdata2);
 785                 break;
 786
 787         default:
 788                 break;
 789         }
 790
 791         RESERVE_SPACE(4 + create->name->len);
 792         WRITE32(create->name->len);
 793         WRITEMEM(create->name->name, create->name->len);
 794         hdr->nops++;
 795
 796         encode_attrs(xdr, create->attrs, create->server);
 797 }
 798
 799 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 800 {
 801         __be32 *p;
 802
 803         RESERVE_SPACE(12);
 804         WRITE32(OP_GETATTR);
 805         WRITE32(1);
 806         WRITE32(bitmap);
 807         hdr->nops++;
 808 }
 809
 810 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 811 {
 812         __be32 *p;
 813
 814         RESERVE_SPACE(16);
 815         WRITE32(OP_GETATTR);
 816         WRITE32(2);
 817         WRITE32(bm0);
 818         WRITE32(bm1);
 819         hdr->nops++;
 820 }
 821
 822 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 823 {
 824         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 825                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 826 }
 827
 828 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 829 {
 830         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 831                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 832 }
 833
 834 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 835 {
 836         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 837                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 838 }
 839
 840 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 841 {
 842         __be32 *p;
 843
 844         RESERVE_SPACE(4);
 845         WRITE32(OP_GETFH);
 846         hdr->nops++;
 847 }
 848
 849 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 850 {
 851         __be32 *p;
 852
 853         RESERVE_SPACE(8 + name->len);
 854         WRITE32(OP_LINK);
 855         WRITE32(name->len);
 856         WRITEMEM(name->name, name->len);
 857         hdr->nops++;
 858 }
 859
 860 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 861 {
 862         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 863                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 864         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 865 }
 866
 867 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 868 {
 869         if (fl->fl_end == OFFSET_MAX)
 870                 return ~(uint64_t)0;
 871         return fl->fl_end - fl->fl_start + 1;
 872 }
 873
 874 /*
 875  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 876  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 877  */
 878 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 879 {
 880         __be32 *p;
 881
 882         RESERVE_SPACE(32);
 883         WRITE32(OP_LOCK);
 884         WRITE32(nfs4_lock_type(args->fl, args->block));
 885         WRITE32(args->reclaim);
 886         WRITE64(args->fl->fl_start);
 887         WRITE64(nfs4_lock_length(args->fl));
 888         WRITE32(args->new_lock_owner);
 889         if (args->new_lock_owner){
 890                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 891                 WRITE32(args->open_seqid->sequence->counter);
 892                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 893                 WRITE32(args->lock_seqid->sequence->counter);
 894                 WRITE64(args->lock_owner.clientid);
 895                 WRITE32(16);
 896                 WRITEMEM("lock id:", 8);
 897                 WRITE64(args->lock_owner.id);
 898         }
 899         else {
 900                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 901                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 902                 WRITE32(args->lock_seqid->sequence->counter);
 903         }
 904         hdr->nops++;
 905 }
 906
 907 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 908 {
 909         __be32 *p;
 910
 911         RESERVE_SPACE(52);
 912         WRITE32(OP_LOCKT);
 913         WRITE32(nfs4_lock_type(args->fl, 0));
 914         WRITE64(args->fl->fl_start);
 915         WRITE64(nfs4_lock_length(args->fl));
 916         WRITE64(args->lock_owner.clientid);
 917         WRITE32(16);
 918         WRITEMEM("lock id:", 8);
 919         WRITE64(args->lock_owner.id);
 920         hdr->nops++;
 921 }
 922
 923 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 924 {
 925         __be32 *p;
 926
 927         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 928         WRITE32(OP_LOCKU);
 929         WRITE32(nfs4_lock_type(args->fl, 0));
 930         WRITE32(args->seqid->sequence->counter);
 931         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 932         WRITE64(args->fl->fl_start);
 933         WRITE64(nfs4_lock_length(args->fl));
 934         hdr->nops++;
 935 }
 936
 937 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 938 {
 939         int len = name->len;
 940         __be32 *p;
 941
 942         RESERVE_SPACE(8 + len);
 943         WRITE32(OP_LOOKUP);
 944         WRITE32(len);
 945         WRITEMEM(name->name, len);
 946         hdr->nops++;
 947 }
 948
 949 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 950 {
 951         __be32 *p;
 952
 953         RESERVE_SPACE(8);
 954         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 955         case FMODE_READ:
 956                 WRITE32(NFS4_SHARE_ACCESS_READ);
 957                 break;
 958         case FMODE_WRITE:
 959                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 960                 break;
 961         case FMODE_READ|FMODE_WRITE:
 962                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 963                 break;
 964         default:
 965                 WRITE32(0);
 966         }
 967         WRITE32(0);             /* for linux, share_deny = 0 always */
 968 }
 969
 970 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 971 {
 972         __be32 *p;
 973  /*
 974  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 975  * owner 4 = 32
 976  */
 977         RESERVE_SPACE(8);
 978         WRITE32(OP_OPEN);
 979         WRITE32(arg->seqid->sequence->counter);
 980         encode_share_access(xdr, arg->fmode);
 981         RESERVE_SPACE(28);
 982         WRITE64(arg->clientid);
 983         WRITE32(16);
 984         WRITEMEM("open id:", 8);
 985         WRITE64(arg->id);
 986 }
 987
 988 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 989 {
 990         __be32 *p;
 991
 992         RESERVE_SPACE(4);
 993         switch(arg->open_flags & O_EXCL) {
 994         case 0:
 995                 WRITE32(NFS4_CREATE_UNCHECKED);
 996                 encode_attrs(xdr, arg->u.attrs, arg->server);
 997                 break;
 998         default:
 999                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1000                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1001         }
1002 }
1003
1004 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1005 {
1006         __be32 *p;
1007
1008         RESERVE_SPACE(4);
1009         switch (arg->open_flags & O_CREAT) {
1010         case 0:
1011                 WRITE32(NFS4_OPEN_NOCREATE);
1012                 break;
1013         default:
1014                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1015                 WRITE32(NFS4_OPEN_CREATE);
1016                 encode_createmode(xdr, arg);
1017         }
1018 }
1019
1020 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1021 {
1022         __be32 *p;
1023
1024         RESERVE_SPACE(4);
1025         switch (delegation_type) {
1026         case 0:
1027                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1028                 break;
1029         case FMODE_READ:
1030                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1031                 break;
1032         case FMODE_WRITE|FMODE_READ:
1033                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1034                 break;
1035         default:
1036                 BUG();
1037         }
1038 }
1039
1040 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1041 {
1042         __be32 *p;
1043
1044         RESERVE_SPACE(4);
1045         WRITE32(NFS4_OPEN_CLAIM_NULL);
1046         encode_string(xdr, name->len, name->name);
1047 }
1048
1049 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1050 {
1051         __be32 *p;
1052
1053         RESERVE_SPACE(4);
1054         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1055         encode_delegation_type(xdr, type);
1056 }
1057
1058 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1059 {
1060         __be32 *p;
1061
1062         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1063         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1064         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1065         encode_string(xdr, name->len, name->name);
1066 }
1067
1068 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1069 {
1070         encode_openhdr(xdr, arg);
1071         encode_opentype(xdr, arg);
1072         switch (arg->claim) {
1073         case NFS4_OPEN_CLAIM_NULL:
1074                 encode_claim_null(xdr, arg->name);
1075                 break;
1076         case NFS4_OPEN_CLAIM_PREVIOUS:
1077                 encode_claim_previous(xdr, arg->u.delegation_type);
1078                 break;
1079         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1080                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1081                 break;
1082         default:
1083                 BUG();
1084         }
1085         hdr->nops++;
1086 }
1087
1088 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1089 {
1090         __be32 *p;
1091
1092         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1093         WRITE32(OP_OPEN_CONFIRM);
1094         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1095         WRITE32(arg->seqid->sequence->counter);
1096         hdr->nops++;
1097 }
1098
1099 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1100 {
1101         __be32 *p;
1102
1103         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1104         WRITE32(OP_OPEN_DOWNGRADE);
1105         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1106         WRITE32(arg->seqid->sequence->counter);
1107         encode_share_access(xdr, arg->fmode);
1108         hdr->nops++;
1109 }
1110
1111 static void
1112 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1113 {
1114         int len = fh->size;
1115         __be32 *p;
1116
1117         RESERVE_SPACE(8 + len);
1118         WRITE32(OP_PUTFH);
1119         WRITE32(len);
1120         WRITEMEM(fh->data, len);
1121         hdr->nops++;
1122 }
1123
1124 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1125 {
1126         __be32 *p;
1127
1128         RESERVE_SPACE(4);
1129         WRITE32(OP_PUTROOTFH);
1130         hdr->nops++;
1131 }
1132
1133 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1134 {
1135         nfs4_stateid stateid;
1136         __be32 *p;
1137
1138         RESERVE_SPACE(NFS4_STATEID_SIZE);
1139         if (ctx->state != NULL) {
1140                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1141                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1142         } else
1143                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1144 }
1145
1146 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1147 {
1148         __be32 *p;
1149
1150         RESERVE_SPACE(4);
1151         WRITE32(OP_READ);
1152
1153         encode_stateid(xdr, args->context);
1154
1155         RESERVE_SPACE(12);
1156         WRITE64(args->offset);
1157         WRITE32(args->count);
1158         hdr->nops++;
1159 }
1160
1161 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1162 {
1163         uint32_t attrs[2] = {
1164                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1165                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1166         };
1167         __be32 *p;
1168
1169         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1170         WRITE32(OP_READDIR);
1171         WRITE64(readdir->cookie);
1172         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1173         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1174         WRITE32(readdir->count);
1175         WRITE32(2);
1176         /* Switch to mounted_on_fileid if the server supports it */
1177         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1178                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1179         else
1180                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1181         WRITE32(attrs[0] & readdir->bitmask[0]);
1182         WRITE32(attrs[1] & readdir->bitmask[1]);
1183         hdr->nops++;
1184         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1185                         __func__,
1186                         (unsigned long long)readdir->cookie,
1187                         ((u32 *)readdir->verifier.data)[0],
1188                         ((u32 *)readdir->verifier.data)[1],
1189                         attrs[0] & readdir->bitmask[0],
1190                         attrs[1] & readdir->bitmask[1]);
1191 }
1192
1193 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1194 {
1195         __be32 *p;
1196
1197         RESERVE_SPACE(4);
1198         WRITE32(OP_READLINK);
1199         hdr->nops++;
1200 }
1201
1202 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1203 {
1204         __be32 *p;
1205
1206         RESERVE_SPACE(8 + name->len);
1207         WRITE32(OP_REMOVE);
1208         WRITE32(name->len);
1209         WRITEMEM(name->name, name->len);
1210         hdr->nops++;
1211 }
1212
1213 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1214 {
1215         __be32 *p;
1216
1217         RESERVE_SPACE(8 + oldname->len);
1218         WRITE32(OP_RENAME);
1219         WRITE32(oldname->len);
1220         WRITEMEM(oldname->name, oldname->len);
1221
1222         RESERVE_SPACE(4 + newname->len);
1223         WRITE32(newname->len);
1224         WRITEMEM(newname->name, newname->len);
1225         hdr->nops++;
1226 }
1227
1228 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1229 {
1230         __be32 *p;
1231
1232         RESERVE_SPACE(12);
1233         WRITE32(OP_RENEW);
1234         WRITE64(client_stateid->cl_clientid);
1235         hdr->nops++;
1236 }
1237
1238 static void
1239 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1240 {
1241         __be32 *p;
1242
1243         RESERVE_SPACE(4);
1244         WRITE32(OP_RESTOREFH);
1245         hdr->nops++;
1246 }
1247
1248 static int
1249 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1250 {
1251         __be32 *p;
1252
1253         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1254         WRITE32(OP_SETATTR);
1255         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1256         RESERVE_SPACE(2*4);
1257         WRITE32(1);
1258         WRITE32(FATTR4_WORD0_ACL);
1259         if (arg->acl_len % 4)
1260                 return -EINVAL;
1261         RESERVE_SPACE(4);
1262         WRITE32(arg->acl_len);
1263         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1264         hdr->nops++;
1265         return 0;
1266 }
1267
1268 static void
1269 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1270 {
1271         __be32 *p;
1272
1273         RESERVE_SPACE(4);
1274         WRITE32(OP_SAVEFH);
1275         hdr->nops++;
1276 }
1277
1278 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1279 {
1280         __be32 *p;
1281
1282         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1283         WRITE32(OP_SETATTR);
1284         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1285         hdr->nops++;
1286         encode_attrs(xdr, arg->iap, server);
1287 }
1288
1289 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1290 {
1291         __be32 *p;
1292
1293         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1294         WRITE32(OP_SETCLIENTID);
1295         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1296
1297         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1298         RESERVE_SPACE(4);
1299         WRITE32(setclientid->sc_prog);
1300         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1301         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1302         RESERVE_SPACE(4);
1303         WRITE32(setclientid->sc_cb_ident);
1304         hdr->nops++;
1305 }
1306
1307 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1308 {
1309         __be32 *p;
1310
1311         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1312         WRITE32(OP_SETCLIENTID_CONFIRM);
1313         WRITE64(client_state->cl_clientid);
1314         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1315         hdr->nops++;
1316 }
1317
1318 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1319 {
1320         __be32 *p;
1321
1322         RESERVE_SPACE(4);
1323         WRITE32(OP_WRITE);
1324
1325         encode_stateid(xdr, args->context);
1326
1327         RESERVE_SPACE(16);
1328         WRITE64(args->offset);
1329         WRITE32(args->stable);
1330         WRITE32(args->count);
1331
1332         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1333         hdr->nops++;
1334 }
1335
1336 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1337 {
1338         __be32 *p;
1339
1340         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1341
1342         WRITE32(OP_DELEGRETURN);
1343         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1344         hdr->nops++;
1345 }
1346 /*
1347  * END OF "GENERIC" ENCODE ROUTINES.
1348  */
1349
1350 /*
1351  * Encode an ACCESS request
1352  */
1353 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1354 {
1355         struct xdr_stream xdr;
1356         struct compound_hdr hdr = {
1357                 .nops = 0,
1358         };
1359
1360         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1361         encode_compound_hdr(&xdr, &hdr);
1362         encode_putfh(&xdr, args->fh, &hdr);
1363         encode_access(&xdr, args->access, &hdr);
1364         encode_getfattr(&xdr, args->bitmask, &hdr);
1365         encode_nops(&hdr);
1366         return 0;
1367 }
1368
1369 /*
1370  * Encode LOOKUP request
1371  */
1372 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1373 {
1374         struct xdr_stream xdr;
1375         struct compound_hdr hdr = {
1376                 .nops = 0,
1377         };
1378
1379         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1380         encode_compound_hdr(&xdr, &hdr);
1381         encode_putfh(&xdr, args->dir_fh, &hdr);
1382         encode_lookup(&xdr, args->name, &hdr);
1383         encode_getfh(&xdr, &hdr);
1384         encode_getfattr(&xdr, args->bitmask, &hdr);
1385         encode_nops(&hdr);
1386         return 0;
1387 }
1388
1389 /*
1390  * Encode LOOKUP_ROOT request
1391  */
1392 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1393 {
1394         struct xdr_stream xdr;
1395         struct compound_hdr hdr = {
1396                 .nops = 0,
1397         };
1398
1399         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1400         encode_compound_hdr(&xdr, &hdr);
1401         encode_putrootfh(&xdr, &hdr);
1402         encode_getfh(&xdr, &hdr);
1403         encode_getfattr(&xdr, args->bitmask, &hdr);
1404         encode_nops(&hdr);
1405         return 0;
1406 }
1407
1408 /*
1409  * Encode REMOVE request
1410  */
1411 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1412 {
1413         struct xdr_stream xdr;
1414         struct compound_hdr hdr = {
1415                 .nops = 0,
1416         };
1417
1418         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1419         encode_compound_hdr(&xdr, &hdr);
1420         encode_putfh(&xdr, args->fh, &hdr);
1421         encode_remove(&xdr, &args->name, &hdr);
1422         encode_getfattr(&xdr, args->bitmask, &hdr);
1423         encode_nops(&hdr);
1424         return 0;
1425 }
1426
1427 /*
1428  * Encode RENAME request
1429  */
1430 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1431 {
1432         struct xdr_stream xdr;
1433         struct compound_hdr hdr = {
1434                 .nops = 0,
1435         };
1436
1437         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1438         encode_compound_hdr(&xdr, &hdr);
1439         encode_putfh(&xdr, args->old_dir, &hdr);
1440         encode_savefh(&xdr, &hdr);
1441         encode_putfh(&xdr, args->new_dir, &hdr);
1442         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1443         encode_getfattr(&xdr, args->bitmask, &hdr);
1444         encode_restorefh(&xdr, &hdr);
1445         encode_getfattr(&xdr, args->bitmask, &hdr);
1446         encode_nops(&hdr);
1447         return 0;
1448 }
1449
1450 /*
1451  * Encode LINK request
1452  */
1453 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1454 {
1455         struct xdr_stream xdr;
1456         struct compound_hdr hdr = {
1457                 .nops = 0,
1458         };
1459
1460         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1461         encode_compound_hdr(&xdr, &hdr);
1462         encode_putfh(&xdr, args->fh, &hdr);
1463         encode_savefh(&xdr, &hdr);
1464         encode_putfh(&xdr, args->dir_fh, &hdr);
1465         encode_link(&xdr, args->name, &hdr);
1466         encode_getfattr(&xdr, args->bitmask, &hdr);
1467         encode_restorefh(&xdr, &hdr);
1468         encode_getfattr(&xdr, args->bitmask, &hdr);
1469         encode_nops(&hdr);
1470         return 0;
1471 }
1472
1473 /*
1474  * Encode CREATE request
1475  */
1476 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1477 {
1478         struct xdr_stream xdr;
1479         struct compound_hdr hdr = {
1480                 .nops = 0,
1481         };
1482
1483         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1484         encode_compound_hdr(&xdr, &hdr);
1485         encode_putfh(&xdr, args->dir_fh, &hdr);
1486         encode_savefh(&xdr, &hdr);
1487         encode_create(&xdr, args, &hdr);
1488         encode_getfh(&xdr, &hdr);
1489         encode_getfattr(&xdr, args->bitmask, &hdr);
1490         encode_restorefh(&xdr, &hdr);
1491         encode_getfattr(&xdr, args->bitmask, &hdr);
1492         encode_nops(&hdr);
1493         return 0;
1494 }
1495
1496 /*
1497  * Encode SYMLINK request
1498  */
1499 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1500 {
1501         return nfs4_xdr_enc_create(req, p, args);
1502 }
1503
1504 /*
1505  * Encode GETATTR request
1506  */
1507 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1508 {
1509         struct xdr_stream xdr;
1510         struct compound_hdr hdr = {
1511                 .nops = 0,
1512         };
1513
1514         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1515         encode_compound_hdr(&xdr, &hdr);
1516         encode_putfh(&xdr, args->fh, &hdr);
1517         encode_getfattr(&xdr, args->bitmask, &hdr);
1518         encode_nops(&hdr);
1519         return 0;
1520 }
1521
1522 /*
1523  * Encode a CLOSE request
1524  */
1525 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1526 {
1527         struct xdr_stream xdr;
1528         struct compound_hdr hdr = {
1529                 .nops   = 0,
1530         };
1531
1532         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1533         encode_compound_hdr(&xdr, &hdr);
1534         encode_putfh(&xdr, args->fh, &hdr);
1535         encode_close(&xdr, args, &hdr);
1536         encode_getfattr(&xdr, args->bitmask, &hdr);
1537         encode_nops(&hdr);
1538         return 0;
1539 }
1540
1541 /*
1542  * Encode an OPEN request
1543  */
1544 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1545 {
1546         struct xdr_stream xdr;
1547         struct compound_hdr hdr = {
1548                 .nops = 0,
1549         };
1550
1551         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1552         encode_compound_hdr(&xdr, &hdr);
1553         encode_putfh(&xdr, args->fh, &hdr);
1554         encode_savefh(&xdr, &hdr);
1555         encode_open(&xdr, args, &hdr);
1556         encode_getfh(&xdr, &hdr);
1557         encode_getfattr(&xdr, args->bitmask, &hdr);
1558         encode_restorefh(&xdr, &hdr);
1559         encode_getfattr(&xdr, args->bitmask, &hdr);
1560         encode_nops(&hdr);
1561         return 0;
1562 }
1563
1564 /*
1565  * Encode an OPEN_CONFIRM request
1566  */
1567 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1568 {
1569         struct xdr_stream xdr;
1570         struct compound_hdr hdr = {
1571                 .nops   = 0,
1572         };
1573
1574         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1575         encode_compound_hdr(&xdr, &hdr);
1576         encode_putfh(&xdr, args->fh, &hdr);
1577         encode_open_confirm(&xdr, args, &hdr);
1578         encode_nops(&hdr);
1579         return 0;
1580 }
1581
1582 /*
1583  * Encode an OPEN request with no attributes.
1584  */
1585 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1586 {
1587         struct xdr_stream xdr;
1588         struct compound_hdr hdr = {
1589                 .nops   = 0,
1590         };
1591
1592         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1593         encode_compound_hdr(&xdr, &hdr);
1594         encode_putfh(&xdr, args->fh, &hdr);
1595         encode_open(&xdr, args, &hdr);
1596         encode_getfattr(&xdr, args->bitmask, &hdr);
1597         encode_nops(&hdr);
1598         return 0;
1599 }
1600
1601 /*
1602  * Encode an OPEN_DOWNGRADE request
1603  */
1604 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1605 {
1606         struct xdr_stream xdr;
1607         struct compound_hdr hdr = {
1608                 .nops   = 0,
1609         };
1610
1611         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1612         encode_compound_hdr(&xdr, &hdr);
1613         encode_putfh(&xdr, args->fh, &hdr);
1614         encode_open_downgrade(&xdr, args, &hdr);
1615         encode_getfattr(&xdr, args->bitmask, &hdr);
1616         encode_nops(&hdr);
1617         return 0;
1618 }
1619
1620 /*
1621  * Encode a LOCK request
1622  */
1623 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1624 {
1625         struct xdr_stream xdr;
1626         struct compound_hdr hdr = {
1627                 .nops   = 0,
1628         };
1629
1630         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1631         encode_compound_hdr(&xdr, &hdr);
1632         encode_putfh(&xdr, args->fh, &hdr);
1633         encode_lock(&xdr, args, &hdr);
1634         encode_nops(&hdr);
1635         return 0;
1636 }
1637
1638 /*
1639  * Encode a LOCKT request
1640  */
1641 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1642 {
1643         struct xdr_stream xdr;
1644         struct compound_hdr hdr = {
1645                 .nops   = 0,
1646         };
1647
1648         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1649         encode_compound_hdr(&xdr, &hdr);
1650         encode_putfh(&xdr, args->fh, &hdr);
1651         encode_lockt(&xdr, args, &hdr);
1652         encode_nops(&hdr);
1653         return 0;
1654 }
1655
1656 /*
1657  * Encode a LOCKU request
1658  */
1659 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1660 {
1661         struct xdr_stream xdr;
1662         struct compound_hdr hdr = {
1663                 .nops   = 0,
1664         };
1665
1666         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1667         encode_compound_hdr(&xdr, &hdr);
1668         encode_putfh(&xdr, args->fh, &hdr);
1669         encode_locku(&xdr, args, &hdr);
1670         encode_nops(&hdr);
1671         return 0;
1672 }
1673
1674 /*
1675  * Encode a READLINK request
1676  */
1677 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1678 {
1679         struct xdr_stream xdr;
1680         struct compound_hdr hdr = {
1681                 .nops = 0,
1682         };
1683         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1684         unsigned int replen;
1685
1686         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1687         encode_compound_hdr(&xdr, &hdr);
1688         encode_putfh(&xdr, args->fh, &hdr);
1689         encode_readlink(&xdr, args, req, &hdr);
1690
1691         /* set up reply kvec
1692          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1693          *      + OP_READLINK + status + string length = 8
1694          */
1695         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1696         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1697                         args->pgbase, args->pglen);
1698         encode_nops(&hdr);
1699         return 0;
1700 }
1701
1702 /*
1703  * Encode a READDIR request
1704  */
1705 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1706 {
1707         struct xdr_stream xdr;
1708         struct compound_hdr hdr = {
1709                 .nops = 0,
1710         };
1711         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1712         int replen;
1713
1714         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1715         encode_compound_hdr(&xdr, &hdr);
1716         encode_putfh(&xdr, args->fh, &hdr);
1717         encode_readdir(&xdr, args, req, &hdr);
1718
1719         /* set up reply kvec
1720          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1721          *      + OP_READDIR + status + verifer(2)  = 9
1722          */
1723         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1724         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1725                          args->pgbase, args->count);
1726         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1727                         __func__, replen, args->pages,
1728                         args->pgbase, args->count);
1729         encode_nops(&hdr);
1730         return 0;
1731 }
1732
1733 /*
1734  * Encode a READ request
1735  */
1736 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1737 {
1738         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1739         struct xdr_stream xdr;
1740         struct compound_hdr hdr = {
1741                 .nops = 0,
1742         };
1743         int replen;
1744
1745         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746         encode_compound_hdr(&xdr, &hdr);
1747         encode_putfh(&xdr, args->fh, &hdr);
1748         encode_read(&xdr, args, &hdr);
1749
1750         /* set up reply kvec
1751          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1752          *       + OP_READ + status + eof + datalen = 9
1753          */
1754         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1755         xdr_inline_pages(&req->rq_rcv_buf, replen,
1756                          args->pages, args->pgbase, args->count);
1757         req->rq_rcv_buf.flags |= XDRBUF_READ;
1758         encode_nops(&hdr);
1759         return 0;
1760 }
1761
1762 /*
1763  * Encode an SETATTR request
1764  */
1765 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1766 {
1767         struct xdr_stream xdr;
1768         struct compound_hdr hdr = {
1769                 .nops   = 0,
1770         };
1771
1772         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1773         encode_compound_hdr(&xdr, &hdr);
1774         encode_putfh(&xdr, args->fh, &hdr);
1775         encode_setattr(&xdr, args, args->server, &hdr);
1776         encode_getfattr(&xdr, args->bitmask, &hdr);
1777         encode_nops(&hdr);
1778         return 0;
1779 }
1780
1781 /*
1782  * Encode a GETACL request
1783  */
1784 static int
1785 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1786                 struct nfs_getaclargs *args)
1787 {
1788         struct xdr_stream xdr;
1789         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1790         struct compound_hdr hdr = {
1791                 .nops   = 0,
1792         };
1793         int replen;
1794
1795         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1796         encode_compound_hdr(&xdr, &hdr);
1797         encode_putfh(&xdr, args->fh, &hdr);
1798         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1799
1800         /* set up reply buffer: */
1801         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1802         xdr_inline_pages(&req->rq_rcv_buf, replen,
1803                 args->acl_pages, args->acl_pgbase, args->acl_len);
1804         encode_nops(&hdr);
1805         return 0;
1806 }
1807
1808 /*
1809  * Encode a WRITE request
1810  */
1811 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1812 {
1813         struct xdr_stream xdr;
1814         struct compound_hdr hdr = {
1815                 .nops = 0,
1816         };
1817
1818         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1819         encode_compound_hdr(&xdr, &hdr);
1820         encode_putfh(&xdr, args->fh, &hdr);
1821         encode_write(&xdr, args, &hdr);
1822         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1823         encode_getfattr(&xdr, args->bitmask, &hdr);
1824         encode_nops(&hdr);
1825         return 0;
1826 }
1827
1828 /*
1829  *  a COMMIT request
1830  */
1831 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1832 {
1833         struct xdr_stream xdr;
1834         struct compound_hdr hdr = {
1835                 .nops = 0,
1836         };
1837
1838         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1839         encode_compound_hdr(&xdr, &hdr);
1840         encode_putfh(&xdr, args->fh, &hdr);
1841         encode_commit(&xdr, args, &hdr);
1842         encode_getfattr(&xdr, args->bitmask, &hdr);
1843         encode_nops(&hdr);
1844         return 0;
1845 }
1846
1847 /*
1848  * FSINFO request
1849  */
1850 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1851 {
1852         struct xdr_stream xdr;
1853         struct compound_hdr hdr = {
1854                 .nops   = 0,
1855         };
1856
1857         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1858         encode_compound_hdr(&xdr, &hdr);
1859         encode_putfh(&xdr, args->fh, &hdr);
1860         encode_fsinfo(&xdr, args->bitmask, &hdr);
1861         encode_nops(&hdr);
1862         return 0;
1863 }
1864
1865 /*
1866  * a PATHCONF request
1867  */
1868 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1869 {
1870         struct xdr_stream xdr;
1871         struct compound_hdr hdr = {
1872                 .nops = 0,
1873         };
1874
1875         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1876         encode_compound_hdr(&xdr, &hdr);
1877         encode_putfh(&xdr, args->fh, &hdr);
1878         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1879                            &hdr);
1880         encode_nops(&hdr);
1881         return 0;
1882 }
1883
1884 /*
1885  * a STATFS request
1886  */
1887 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1888 {
1889         struct xdr_stream xdr;
1890         struct compound_hdr hdr = {
1891                 .nops = 0,
1892         };
1893
1894         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1895         encode_compound_hdr(&xdr, &hdr);
1896         encode_putfh(&xdr, args->fh, &hdr);
1897         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1898                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1899         encode_nops(&hdr);
1900         return 0;
1901 }
1902
1903 /*
1904  * GETATTR_BITMAP request
1905  */
1906 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
1907 {
1908         struct xdr_stream xdr;
1909         struct compound_hdr hdr = {
1910                 .nops = 0,
1911         };
1912
1913         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914         encode_compound_hdr(&xdr, &hdr);
1915         encode_putfh(&xdr, fhandle, &hdr);
1916         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1917                            FATTR4_WORD0_LINK_SUPPORT|
1918                            FATTR4_WORD0_SYMLINK_SUPPORT|
1919                            FATTR4_WORD0_ACLSUPPORT, &hdr);
1920         encode_nops(&hdr);
1921         return 0;
1922 }
1923
1924 /*
1925  * a RENEW request
1926  */
1927 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1928 {
1929         struct xdr_stream xdr;
1930         struct compound_hdr hdr = {
1931                 .nops   = 0,
1932         };
1933
1934         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1935         encode_compound_hdr(&xdr, &hdr);
1936         encode_renew(&xdr, clp, &hdr);
1937         encode_nops(&hdr);
1938         return 0;
1939 }
1940
1941 /*
1942  * a SETCLIENTID request
1943  */
1944 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1945 {
1946         struct xdr_stream xdr;
1947         struct compound_hdr hdr = {
1948                 .nops   = 0,
1949         };
1950
1951         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1952         encode_compound_hdr(&xdr, &hdr);
1953         encode_setclientid(&xdr, sc, &hdr);
1954         encode_nops(&hdr);
1955         return 0;
1956 }
1957
1958 /*
1959  * a SETCLIENTID_CONFIRM request
1960  */
1961 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1962 {
1963         struct xdr_stream xdr;
1964         struct compound_hdr hdr = {
1965                 .nops   = 0,
1966         };
1967         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1968
1969         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1970         encode_compound_hdr(&xdr, &hdr);
1971         encode_setclientid_confirm(&xdr, clp, &hdr);
1972         encode_putrootfh(&xdr, &hdr);
1973         encode_fsinfo(&xdr, lease_bitmap, &hdr);
1974         encode_nops(&hdr);
1975         return 0;
1976 }
1977
1978 /*
1979  * DELEGRETURN request
1980  */
1981 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1982 {
1983         struct xdr_stream xdr;
1984         struct compound_hdr hdr = {
1985                 .nops = 0,
1986         };
1987
1988         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1989         encode_compound_hdr(&xdr, &hdr);
1990         encode_putfh(&xdr, args->fhandle, &hdr);
1991         encode_delegreturn(&xdr, args->stateid, &hdr);
1992         encode_getfattr(&xdr, args->bitmask, &hdr);
1993         encode_nops(&hdr);
1994         return 0;
1995 }
1996
1997 /*
1998  * Encode FS_LOCATIONS request
1999  */
2000 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2001 {
2002         struct xdr_stream xdr;
2003         struct compound_hdr hdr = {
2004                 .nops = 0,
2005         };
2006         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2007         int replen;
2008
2009         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2010         encode_compound_hdr(&xdr, &hdr);
2011         encode_putfh(&xdr, args->dir_fh, &hdr);
2012         encode_lookup(&xdr, args->name, &hdr);
2013         encode_fs_locations(&xdr, args->bitmask, &hdr);
2014
2015         /* set up reply
2016          *   toplevel_status + OP_PUTFH + status
2017          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2018          */
2019         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2020         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2021                         0, PAGE_SIZE);
2022         encode_nops(&hdr);
2023         return 0;
2024 }
2025
2026 /*
2027  * START OF "GENERIC" DECODE ROUTINES.
2028  *   These may look a little ugly since they are imported from a "generic"
2029  * set of XDR encode/decode routines which are intended to be shared by
2030  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2031  *
2032  * If the pain of reading these is too great, it should be a straightforward
2033  * task to translate them into Linux-specific versions which are more
2034  * consistent with the style used in NFSv2/v3...
2035  */
2036 #define READ32(x)         (x) = ntohl(*p++)
2037 #define READ64(x)         do {                  \
2038         (x) = (u64)ntohl(*p++) << 32;           \
2039         (x) |= ntohl(*p++);                     \
2040 } while (0)
2041 #define READTIME(x)       do {                  \
2042         p++;                                    \
2043         (x.tv_sec) = ntohl(*p++);               \
2044         (x.tv_nsec) = ntohl(*p++);              \
2045 } while (0)
2046 #define COPYMEM(x,nbytes) do {                  \
2047         memcpy((x), p, nbytes);                 \
2048         p += XDR_QUADLEN(nbytes);               \
2049 } while (0)
2050
2051 #define READ_BUF(nbytes)  do { \
2052         p = xdr_inline_decode(xdr, nbytes); \
2053         if (unlikely(!p)) { \
2054                 dprintk("nfs: %s: prematurely hit end of receive" \
2055                                 " buffer\n", __func__); \
2056                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2057                                 __func__, xdr->p, nbytes, xdr->end); \
2058                 return -EIO; \
2059         } \
2060 } while (0)
2061
2062 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2063 {
2064         __be32 *p;
2065
2066         READ_BUF(4);
2067         READ32(*len);
2068         READ_BUF(*len);
2069         *string = (char *)p;
2070         return 0;
2071 }
2072
2073 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2074 {
2075         __be32 *p;
2076
2077         READ_BUF(8);
2078         READ32(hdr->status);
2079         READ32(hdr->taglen);
2080
2081         READ_BUF(hdr->taglen + 4);
2082         hdr->tag = (char *)p;
2083         p += XDR_QUADLEN(hdr->taglen);
2084         READ32(hdr->nops);
2085         if (unlikely(hdr->nops < 1))
2086                 return nfs4_stat_to_errno(hdr->status);
2087         return 0;
2088 }
2089
2090 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2091 {
2092         __be32 *p;
2093         uint32_t opnum;
2094         int32_t nfserr;
2095
2096         READ_BUF(8);
2097         READ32(opnum);
2098         if (opnum != expected) {
2099                 dprintk("nfs: Server returned operation"
2100                         " %d but we issued a request for %d\n",
2101                                 opnum, expected);
2102                 return -EIO;
2103         }
2104         READ32(nfserr);
2105         if (nfserr != NFS_OK)
2106                 return nfs4_stat_to_errno(nfserr);
2107         return 0;
2108 }
2109
2110 /* Dummy routine */
2111 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2112 {
2113         __be32 *p;
2114         unsigned int strlen;
2115         char *str;
2116
2117         READ_BUF(12);
2118         return decode_opaque_inline(xdr, &strlen, &str);
2119 }
2120
2121 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2122 {
2123         uint32_t bmlen;
2124         __be32 *p;
2125
2126         READ_BUF(4);
2127         READ32(bmlen);
2128
2129         bitmap[0] = bitmap[1] = 0;
2130         READ_BUF((bmlen << 2));
2131         if (bmlen > 0) {
2132                 READ32(bitmap[0]);
2133                 if (bmlen > 1)
2134                         READ32(bitmap[1]);
2135         }
2136         return 0;
2137 }
2138
2139 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2140 {
2141         __be32 *p;
2142
2143         READ_BUF(4);
2144         READ32(*attrlen);
2145         *savep = xdr->p;
2146         return 0;
2147 }
2148
2149 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2150 {
2151         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2152                 decode_attr_bitmap(xdr, bitmask);
2153                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2154         } else
2155                 bitmask[0] = bitmask[1] = 0;
2156         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2157         return 0;
2158 }
2159
2160 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2161 {
2162         __be32 *p;
2163
2164         *type = 0;
2165         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2166                 return -EIO;
2167         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2168                 READ_BUF(4);
2169                 READ32(*type);
2170                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2171                         dprintk("%s: bad type %d\n", __func__, *type);
2172                         return -EIO;
2173                 }
2174                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2175         }
2176         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type].nfs2type);
2177         return 0;
2178 }
2179
2180 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2181 {
2182         __be32 *p;
2183
2184         *change = 0;
2185         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2186                 return -EIO;
2187         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2188                 READ_BUF(8);
2189                 READ64(*change);
2190                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2191         }
2192         dprintk("%s: change attribute=%Lu\n", __func__,
2193                         (unsigned long long)*change);
2194         return 0;
2195 }
2196
2197 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2198 {
2199         __be32 *p;
2200
2201         *size = 0;
2202         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2203                 return -EIO;
2204         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2205                 READ_BUF(8);
2206                 READ64(*size);
2207                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2208         }
2209         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2210         return 0;
2211 }
2212
2213 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2214 {
2215         __be32 *p;
2216
2217         *res = 0;
2218         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2219                 return -EIO;
2220         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2221                 READ_BUF(4);
2222                 READ32(*res);
2223                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2224         }
2225         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2226         return 0;
2227 }
2228
2229 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2230 {
2231         __be32 *p;
2232
2233         *res = 0;
2234         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2235                 return -EIO;
2236         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2237                 READ_BUF(4);
2238                 READ32(*res);
2239                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2240         }
2241         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2242         return 0;
2243 }
2244
2245 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2246 {
2247         __be32 *p;
2248
2249         fsid->major = 0;
2250         fsid->minor = 0;
2251         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2252                 return -EIO;
2253         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2254                 READ_BUF(16);
2255                 READ64(fsid->major);
2256                 READ64(fsid->minor);
2257                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2258         }
2259         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2260                         (unsigned long long)fsid->major,
2261                         (unsigned long long)fsid->minor);
2262         return 0;
2263 }
2264
2265 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2266 {
2267         __be32 *p;
2268
2269         *res = 60;
2270         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2271                 return -EIO;
2272         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2273                 READ_BUF(4);
2274                 READ32(*res);
2275                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2276         }
2277         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2278         return 0;
2279 }
2280
2281 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2282 {
2283         __be32 *p;
2284
2285         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2286         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2287                 return -EIO;
2288         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2289                 READ_BUF(4);
2290                 READ32(*res);
2291                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2292         }
2293         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2294         return 0;
2295 }
2296
2297 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2298 {
2299         __be32 *p;
2300
2301         *fileid = 0;
2302         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2303                 return -EIO;
2304         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2305                 READ_BUF(8);
2306                 READ64(*fileid);
2307                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2308         }
2309         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2310         return 0;
2311 }
2312
2313 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2314 {
2315         __be32 *p;
2316
2317         *fileid = 0;
2318         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2319                 return -EIO;
2320         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2321                 READ_BUF(8);
2322                 READ64(*fileid);
2323                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2324         }
2325         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2326         return 0;
2327 }
2328
2329 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2330 {
2331         __be32 *p;
2332         int status = 0;
2333
2334         *res = 0;
2335         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2336                 return -EIO;
2337         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2338                 READ_BUF(8);
2339                 READ64(*res);
2340                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2341         }
2342         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2343         return status;
2344 }
2345
2346 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2347 {
2348         __be32 *p;
2349         int status = 0;
2350
2351         *res = 0;
2352         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2353                 return -EIO;
2354         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2355                 READ_BUF(8);
2356                 READ64(*res);
2357                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2358         }
2359         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2360         return status;
2361 }
2362
2363 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2364 {
2365         __be32 *p;
2366         int status = 0;
2367
2368         *res = 0;
2369         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2370                 return -EIO;
2371         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2372                 READ_BUF(8);
2373                 READ64(*res);
2374                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2375         }
2376         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2377         return status;
2378 }
2379
2380 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2381 {
2382         u32 n;
2383         __be32 *p;
2384         int status = 0;
2385
2386         READ_BUF(4);
2387         READ32(n);
2388         if (n == 0)
2389                 goto root_path;
2390         dprintk("path ");
2391         path->ncomponents = 0;
2392         while (path->ncomponents < n) {
2393                 struct nfs4_string *component = &path->components[path->ncomponents];
2394                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2395                 if (unlikely(status != 0))
2396                         goto out_eio;
2397                 if (path->ncomponents != n)
2398                         dprintk("/");
2399                 dprintk("%s", component->data);
2400                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2401                         path->ncomponents++;
2402                 else {
2403                         dprintk("cannot parse %d components in path\n", n);
2404                         goto out_eio;
2405                 }
2406         }
2407 out:
2408         dprintk("\n");
2409         return status;
2410 root_path:
2411 /* a root pathname is sent as a zero component4 */
2412         path->ncomponents = 1;
2413         path->components[0].len=0;
2414         path->components[0].data=NULL;
2415         dprintk("path /\n");
2416         goto out;
2417 out_eio:
2418         dprintk(" status %d", status);
2419         status = -EIO;
2420         goto out;
2421 }
2422
2423 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2424 {
2425         int n;
2426         __be32 *p;
2427         int status = -EIO;
2428
2429         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2430                 goto out;
2431         status = 0;
2432         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2433                 goto out;
2434         dprintk("%s: fsroot ", __func__);
2435         status = decode_pathname(xdr, &res->fs_path);
2436         if (unlikely(status != 0))
2437                 goto out;
2438         READ_BUF(4);
2439         READ32(n);
2440         if (n <= 0)
2441                 goto out_eio;
2442         res->nlocations = 0;
2443         while (res->nlocations < n) {
2444                 u32 m;
2445                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2446
2447                 READ_BUF(4);
2448                 READ32(m);
2449
2450                 loc->nservers = 0;
2451                 dprintk("%s: servers ", __func__);
2452                 while (loc->nservers < m) {
2453                         struct nfs4_string *server = &loc->servers[loc->nservers];
2454                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2455                         if (unlikely(status != 0))
2456                                 goto out_eio;
2457                         dprintk("%s ", server->data);
2458                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2459                                 loc->nservers++;
2460                         else {
2461                                 unsigned int i;
2462                                 dprintk("%s: using first %u of %u servers "
2463                                         "returned for location %u\n",
2464                                                 __func__,
2465                                                 NFS4_FS_LOCATION_MAXSERVERS,
2466                                                 m, res->nlocations);
2467                                 for (i = loc->nservers; i < m; i++) {
2468                                         unsigned int len;
2469                                         char *data;
2470                                         status = decode_opaque_inline(xdr, &len, &data);
2471                                         if (unlikely(status != 0))
2472                                                 goto out_eio;
2473                                 }
2474                         }
2475                 }
2476                 status = decode_pathname(xdr, &loc->rootpath);
2477                 if (unlikely(status != 0))
2478                         goto out_eio;
2479                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2480                         res->nlocations++;
2481         }
2482 out:
2483         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2484         return status;
2485 out_eio:
2486         status = -EIO;
2487         goto out;
2488 }
2489
2490 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2491 {
2492         __be32 *p;
2493         int status = 0;
2494
2495         *res = 0;
2496         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2497                 return -EIO;
2498         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2499                 READ_BUF(8);
2500                 READ64(*res);
2501                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2502         }
2503         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2504         return status;
2505 }
2506
2507 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2508 {
2509         __be32 *p;
2510         int status = 0;
2511
2512         *maxlink = 1;
2513         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2514                 return -EIO;
2515         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2516                 READ_BUF(4);
2517                 READ32(*maxlink);
2518                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2519         }
2520         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2521         return status;
2522 }
2523
2524 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2525 {
2526         __be32 *p;
2527         int status = 0;
2528
2529         *maxname = 1024;
2530         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2531                 return -EIO;
2532         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2533                 READ_BUF(4);
2534                 READ32(*maxname);
2535                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2536         }
2537         dprintk("%s: maxname=%u\n", __func__, *maxname);
2538         return status;
2539 }
2540
2541 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2542 {
2543         __be32 *p;
2544         int status = 0;
2545
2546         *res = 1024;
2547         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2548                 return -EIO;
2549         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2550                 uint64_t maxread;
2551                 READ_BUF(8);
2552                 READ64(maxread);
2553                 if (maxread > 0x7FFFFFFF)
2554                         maxread = 0x7FFFFFFF;
2555                 *res = (uint32_t)maxread;
2556                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2557         }
2558         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2559         return status;
2560 }
2561
2562 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2563 {
2564         __be32 *p;
2565         int status = 0;
2566
2567         *res = 1024;
2568         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2569                 return -EIO;
2570         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2571                 uint64_t maxwrite;
2572                 READ_BUF(8);
2573                 READ64(maxwrite);
2574                 if (maxwrite > 0x7FFFFFFF)
2575                         maxwrite = 0x7FFFFFFF;
2576                 *res = (uint32_t)maxwrite;
2577                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2578         }
2579         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2580         return status;
2581 }
2582
2583 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2584 {
2585         __be32 *p;
2586
2587         *mode = 0;
2588         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2589                 return -EIO;
2590         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2591                 READ_BUF(4);
2592                 READ32(*mode);
2593                 *mode &= ~S_IFMT;
2594                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2595         }
2596         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2597         return 0;
2598 }
2599
2600 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2601 {
2602         __be32 *p;
2603
2604         *nlink = 1;
2605         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2606                 return -EIO;
2607         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2608                 READ_BUF(4);
2609                 READ32(*nlink);
2610                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2611         }
2612         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2613         return 0;
2614 }
2615
2616 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2617 {
2618         uint32_t len;
2619         __be32 *p;
2620
2621         *uid = -2;
2622         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2623                 return -EIO;
2624         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2625                 READ_BUF(4);
2626                 READ32(len);
2627                 READ_BUF(len);
2628                 if (len < XDR_MAX_NETOBJ) {
2629                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2630                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2631                                                 __func__);
2632                 } else
2633                         dprintk("%s: name too long (%u)!\n",
2634                                         __func__, len);
2635                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2636         }
2637         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2638         return 0;
2639 }
2640
2641 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2642 {
2643         uint32_t len;
2644         __be32 *p;
2645
2646         *gid = -2;
2647         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2648                 return -EIO;
2649         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2650                 READ_BUF(4);
2651                 READ32(len);
2652                 READ_BUF(len);
2653                 if (len < XDR_MAX_NETOBJ) {
2654                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2655                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2656                                                 __func__);
2657                 } else
2658                         dprintk("%s: name too long (%u)!\n",
2659                                         __func__, len);
2660                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2661         }
2662         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2663         return 0;
2664 }
2665
2666 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2667 {
2668         uint32_t major = 0, minor = 0;
2669         __be32 *p;
2670
2671         *rdev = MKDEV(0,0);
2672         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2673                 return -EIO;
2674         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2675                 dev_t tmp;
2676
2677                 READ_BUF(8);
2678                 READ32(major);
2679                 READ32(minor);
2680                 tmp = MKDEV(major, minor);
2681                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2682                         *rdev = tmp;
2683                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2684         }
2685         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2686         return 0;
2687 }
2688
2689 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2690 {
2691         __be32 *p;
2692         int status = 0;
2693
2694         *res = 0;
2695         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2696                 return -EIO;
2697         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2698                 READ_BUF(8);
2699                 READ64(*res);
2700                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2701         }
2702         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2703         return status;
2704 }
2705
2706 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2707 {
2708         __be32 *p;
2709         int status = 0;
2710
2711         *res = 0;
2712         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2713                 return -EIO;
2714         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2715                 READ_BUF(8);
2716                 READ64(*res);
2717                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2718         }
2719         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2720         return status;
2721 }
2722
2723 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2724 {
2725         __be32 *p;
2726         int status = 0;
2727
2728         *res = 0;
2729         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2730                 return -EIO;
2731         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2732                 READ_BUF(8);
2733                 READ64(*res);
2734                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2735         }
2736         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2737         return status;
2738 }
2739
2740 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2741 {
2742         __be32 *p;
2743
2744         *used = 0;
2745         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2746                 return -EIO;
2747         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2748                 READ_BUF(8);
2749                 READ64(*used);
2750                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2751         }
2752         dprintk("%s: space used=%Lu\n", __func__,
2753                         (unsigned long long)*used);
2754         return 0;
2755 }
2756
2757 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2758 {
2759         __be32 *p;
2760         uint64_t sec;
2761         uint32_t nsec;
2762
2763         READ_BUF(12);
2764         READ64(sec);
2765         READ32(nsec);
2766         time->tv_sec = (time_t)sec;
2767         time->tv_nsec = (long)nsec;
2768         return 0;
2769 }
2770
2771 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2772 {
2773         int status = 0;
2774
2775         time->tv_sec = 0;
2776         time->tv_nsec = 0;
2777         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2778                 return -EIO;
2779         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2780                 status = decode_attr_time(xdr, time);
2781                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2782         }
2783         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2784         return status;
2785 }
2786
2787 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2788 {
2789         int status = 0;
2790
2791         time->tv_sec = 0;
2792         time->tv_nsec = 0;
2793         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2794                 return -EIO;
2795         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2796                 status = decode_attr_time(xdr, time);
2797                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2798         }
2799         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2800         return status;
2801 }
2802
2803 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2804 {
2805         int status = 0;
2806
2807         time->tv_sec = 0;
2808         time->tv_nsec = 0;
2809         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2810                 return -EIO;
2811         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2812                 status = decode_attr_time(xdr, time);
2813                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2814         }
2815         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2816         return status;
2817 }
2818
2819 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2820 {
2821         unsigned int attrwords = XDR_QUADLEN(attrlen);
2822         unsigned int nwords = xdr->p - savep;
2823
2824         if (unlikely(attrwords != nwords)) {
2825                 dprintk("%s: server returned incorrect attribute length: "
2826                         "%u %c %u\n",
2827                                 __func__,
2828                                 attrwords << 2,
2829                                 (attrwords < nwords) ? '<' : '>',
2830                                 nwords << 2);
2831                 return -EIO;
2832         }
2833         return 0;
2834 }
2835
2836 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2837 {
2838         __be32 *p;
2839
2840         READ_BUF(20);
2841         READ32(cinfo->atomic);
2842         READ64(cinfo->before);
2843         READ64(cinfo->after);
2844         return 0;
2845 }
2846
2847 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2848 {
2849         __be32 *p;
2850         uint32_t supp, acc;
2851         int status;
2852
2853         status = decode_op_hdr(xdr, OP_ACCESS);
2854         if (status)
2855                 return status;
2856         READ_BUF(8);
2857         READ32(supp);
2858         READ32(acc);
2859         access->supported = supp;
2860         access->access = acc;
2861         return 0;
2862 }
2863
2864 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2865 {
2866         __be32 *p;
2867         int status;
2868
2869         status = decode_op_hdr(xdr, OP_CLOSE);
2870         if (status != -EIO)
2871                 nfs_increment_open_seqid(status, res->seqid);
2872         if (status)
2873                 return status;
2874         READ_BUF(NFS4_STATEID_SIZE);
2875         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2876         return 0;
2877 }
2878
2879 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2880 {
2881         __be32 *p;
2882         int status;
2883
2884         status = decode_op_hdr(xdr, OP_COMMIT);
2885         if (status)
2886                 return status;
2887         READ_BUF(8);
2888         COPYMEM(res->verf->verifier, 8);
2889         return 0;
2890 }
2891
2892 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2893 {
2894         __be32 *p;
2895         uint32_t bmlen;
2896         int status;
2897
2898         status = decode_op_hdr(xdr, OP_CREATE);
2899         if (status)
2900                 return status;
2901         if ((status = decode_change_info(xdr, cinfo)))
2902                 return status;
2903         READ_BUF(4);
2904         READ32(bmlen);
2905         READ_BUF(bmlen << 2);
2906         return 0;
2907 }
2908
2909 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2910 {
2911         __be32 *savep;
2912         uint32_t attrlen, bitmap[2] = {0};
2913         int status;
2914
2915         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2916                 goto xdr_error;
2917         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2918                 goto xdr_error;
2919         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2920                 goto xdr_error;
2921         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2922                 goto xdr_error;
2923         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2924                 goto xdr_error;
2925         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2926                 goto xdr_error;
2927         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2928                 goto xdr_error;
2929         status = verify_attr_len(xdr, savep, attrlen);
2930 xdr_error:
2931         dprintk("%s: xdr returned %d!\n", __func__, -status);
2932         return status;
2933 }
2934
2935 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2936 {
2937         __be32 *savep;
2938         uint32_t attrlen, bitmap[2] = {0};
2939         int status;
2940
2941         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2942                 goto xdr_error;
2943         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2944                 goto xdr_error;
2945         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2946                 goto xdr_error;
2947
2948         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2949                 goto xdr_error;
2950         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2951                 goto xdr_error;
2952         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2953                 goto xdr_error;
2954         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2955                 goto xdr_error;
2956         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2957                 goto xdr_error;
2958         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2959                 goto xdr_error;
2960
2961         status = verify_attr_len(xdr, savep, attrlen);
2962 xdr_error:
2963         dprintk("%s: xdr returned %d!\n", __func__, -status);
2964         return status;
2965 }
2966
2967 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
2968 {
2969         __be32 *savep;
2970         uint32_t attrlen, bitmap[2] = {0};
2971         int status;
2972
2973         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2974                 goto xdr_error;
2975         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2976                 goto xdr_error;
2977         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2978                 goto xdr_error;
2979
2980         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
2981                 goto xdr_error;
2982         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
2983                 goto xdr_error;
2984
2985         status = verify_attr_len(xdr, savep, attrlen);
2986 xdr_error:
2987         dprintk("%s: xdr returned %d!\n", __func__, -status);
2988         return status;
2989 }
2990
2991 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
2992 {
2993         __be32 *savep;
2994         uint32_t attrlen,
2995                  bitmap[2] = {0},
2996                  type;
2997         int status, fmode = 0;
2998         uint64_t fileid;
2999
3000         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3001                 goto xdr_error;
3002         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3003                 goto xdr_error;
3004
3005         fattr->bitmap[0] = bitmap[0];
3006         fattr->bitmap[1] = bitmap[1];
3007
3008         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3009                 goto xdr_error;
3010
3011
3012         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3013                 goto xdr_error;
3014         fattr->type = nfs_type2fmt[type].nfs2type;
3015         fmode = nfs_type2fmt[type].mode;
3016
3017         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3018                 goto xdr_error;
3019         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3020                 goto xdr_error;
3021         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3022                 goto xdr_error;
3023         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3024                 goto xdr_error;
3025         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3026                                                 struct nfs4_fs_locations,
3027                                                 fattr))) != 0)
3028                 goto xdr_error;
3029         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3030                 goto xdr_error;
3031         fattr->mode |= fmode;
3032         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3033                 goto xdr_error;
3034         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3035                 goto xdr_error;
3036         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3037                 goto xdr_error;
3038         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3039                 goto xdr_error;
3040         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3041                 goto xdr_error;
3042         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3043                 goto xdr_error;
3044         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3045                 goto xdr_error;
3046         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3047                 goto xdr_error;
3048         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3049                 goto xdr_error;
3050         if (fattr->fileid == 0 && fileid != 0)
3051                 fattr->fileid = fileid;
3052         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3053                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3054 xdr_error:
3055         dprintk("%s: xdr returned %d\n", __func__, -status);
3056         return status;
3057 }
3058
3059
3060 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3061 {
3062         __be32 *savep;
3063         uint32_t attrlen, bitmap[2];
3064         int status;
3065
3066         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3067                 goto xdr_error;
3068         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3069                 goto xdr_error;
3070         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3071                 goto xdr_error;
3072
3073         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3074
3075         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3076                 goto xdr_error;
3077         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3078                 goto xdr_error;
3079         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3080                 goto xdr_error;
3081         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3082         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3083                 goto xdr_error;
3084         fsinfo->wtpref = fsinfo->wtmax;
3085
3086         status = verify_attr_len(xdr, savep, attrlen);
3087 xdr_error:
3088         dprintk("%s: xdr returned %d!\n", __func__, -status);
3089         return status;
3090 }
3091
3092 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3093 {
3094         __be32 *p;
3095         uint32_t len;
3096         int status;
3097
3098         /* Zero handle first to allow comparisons */
3099         memset(fh, 0, sizeof(*fh));
3100
3101         status = decode_op_hdr(xdr, OP_GETFH);
3102         if (status)
3103                 return status;
3104
3105         READ_BUF(4);
3106         READ32(len);
3107         if (len > NFS4_FHSIZE)
3108                 return -EIO;
3109         fh->size = len;
3110         READ_BUF(len);
3111         COPYMEM(fh->data, len);
3112         return 0;
3113 }
3114
3115 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3116 {
3117         int status;
3118
3119         status = decode_op_hdr(xdr, OP_LINK);
3120         if (status)
3121                 return status;
3122         return decode_change_info(xdr, cinfo);
3123 }
3124
3125 /*
3126  * We create the owner, so we know a proper owner.id length is 4.
3127  */
3128 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3129 {
3130         uint64_t offset, length, clientid;
3131         __be32 *p;
3132         uint32_t namelen, type;
3133
3134         READ_BUF(32);
3135         READ64(offset);
3136         READ64(length);
3137         READ32(type);
3138         if (fl != NULL) {
3139                 fl->fl_start = (loff_t)offset;
3140                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3141                 if (length == ~(uint64_t)0)
3142                         fl->fl_end = OFFSET_MAX;
3143                 fl->fl_type = F_WRLCK;
3144                 if (type & 1)
3145                         fl->fl_type = F_RDLCK;
3146                 fl->fl_pid = 0;
3147         }
3148         READ64(clientid);
3149         READ32(namelen);
3150         READ_BUF(namelen);
3151         return -NFS4ERR_DENIED;
3152 }
3153
3154 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3155 {
3156         __be32 *p;
3157         int status;
3158
3159         status = decode_op_hdr(xdr, OP_LOCK);
3160         if (status == -EIO)
3161                 goto out;
3162         if (status == 0) {
3163                 READ_BUF(NFS4_STATEID_SIZE);
3164                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3165         } else if (status == -NFS4ERR_DENIED)
3166                 status = decode_lock_denied(xdr, NULL);
3167         if (res->open_seqid != NULL)
3168                 nfs_increment_open_seqid(status, res->open_seqid);
3169         nfs_increment_lock_seqid(status, res->lock_seqid);
3170 out:
3171         return status;
3172 }
3173
3174 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3175 {
3176         int status;
3177         status = decode_op_hdr(xdr, OP_LOCKT);
3178         if (status == -NFS4ERR_DENIED)
3179                 return decode_lock_denied(xdr, res->denied);
3180         return status;
3181 }
3182
3183 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3184 {
3185         __be32 *p;
3186         int status;
3187
3188         status = decode_op_hdr(xdr, OP_LOCKU);
3189         if (status != -EIO)
3190                 nfs_increment_lock_seqid(status, res->seqid);
3191         if (status == 0) {
3192                 READ_BUF(NFS4_STATEID_SIZE);
3193                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3194         }
3195         return status;
3196 }
3197
3198 static int decode_lookup(struct xdr_stream *xdr)
3199 {
3200         return decode_op_hdr(xdr, OP_LOOKUP);
3201 }
3202
3203 /* This is too sick! */
3204 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3205 {
3206         __be32 *p;
3207         uint32_t limit_type, nblocks, blocksize;
3208
3209         READ_BUF(12);
3210         READ32(limit_type);
3211         switch (limit_type) {
3212         case 1:
3213                 READ64(*maxsize);
3214                 break;
3215         case 2:
3216                 READ32(nblocks);
3217                 READ32(blocksize);
3218                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3219         }
3220         return 0;
3221 }
3222
3223 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3224 {
3225         __be32 *p;
3226         uint32_t delegation_type;
3227
3228         READ_BUF(4);
3229         READ32(delegation_type);
3230         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3231                 res->delegation_type = 0;
3232                 return 0;
3233         }
3234         READ_BUF(NFS4_STATEID_SIZE+4);
3235         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3236         READ32(res->do_recall);
3237
3238         switch (delegation_type) {
3239         case NFS4_OPEN_DELEGATE_READ:
3240                 res->delegation_type = FMODE_READ;
3241                 break;
3242         case NFS4_OPEN_DELEGATE_WRITE:
3243                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3244                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3245                                 return -EIO;
3246         }
3247         return decode_ace(xdr, NULL, res->server->nfs_client);
3248 }
3249
3250 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3251 {
3252         __be32 *p;
3253         uint32_t savewords, bmlen, i;
3254         int status;
3255
3256         status = decode_op_hdr(xdr, OP_OPEN);
3257         if (status != -EIO)
3258                 nfs_increment_open_seqid(status, res->seqid);
3259         if (status)
3260                 return status;
3261         READ_BUF(NFS4_STATEID_SIZE);
3262         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3263
3264         decode_change_info(xdr, &res->cinfo);
3265
3266         READ_BUF(8);
3267         READ32(res->rflags);
3268         READ32(bmlen);
3269         if (bmlen > 10)
3270                 goto xdr_error;
3271
3272         READ_BUF(bmlen << 2);
3273         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3274         for (i = 0; i < savewords; ++i)
3275                 READ32(res->attrset[i]);
3276         for (; i < NFS4_BITMAP_SIZE; i++)
3277                 res->attrset[i] = 0;
3278
3279         return decode_delegation(xdr, res);
3280 xdr_error:
3281         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3282         return -EIO;
3283 }
3284
3285 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3286 {
3287         __be32 *p;
3288         int status;
3289
3290         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3291         if (status != -EIO)
3292                 nfs_increment_open_seqid(status, res->seqid);
3293         if (status)
3294                 return status;
3295         READ_BUF(NFS4_STATEID_SIZE);
3296         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3297         return 0;
3298 }
3299
3300 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3301 {
3302         __be32 *p;
3303         int status;
3304
3305         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3306         if (status != -EIO)
3307                 nfs_increment_open_seqid(status, res->seqid);
3308         if (status)
3309                 return status;
3310         READ_BUF(NFS4_STATEID_SIZE);
3311         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3312         return 0;
3313 }
3314
3315 static int decode_putfh(struct xdr_stream *xdr)
3316 {
3317         return decode_op_hdr(xdr, OP_PUTFH);
3318 }
3319
3320 static int decode_putrootfh(struct xdr_stream *xdr)
3321 {
3322         return decode_op_hdr(xdr, OP_PUTROOTFH);
3323 }
3324
3325 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3326 {
3327         struct kvec *iov = req->rq_rcv_buf.head;
3328         __be32 *p;
3329         uint32_t count, eof, recvd, hdrlen;
3330         int status;
3331
3332         status = decode_op_hdr(xdr, OP_READ);
3333         if (status)
3334                 return status;
3335         READ_BUF(8);
3336         READ32(eof);
3337         READ32(count);
3338         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3339         recvd = req->rq_rcv_buf.len - hdrlen;
3340         if (count > recvd) {
3341                 dprintk("NFS: server cheating in read reply: "
3342                                 "count %u > recvd %u\n", count, recvd);
3343                 count = recvd;
3344                 eof = 0;
3345         }
3346         xdr_read_pages(xdr, count);
3347         res->eof = eof;
3348         res->count = count;
3349         return 0;
3350 }
3351
3352 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3353 {
3354         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3355         struct page     *page = *rcvbuf->pages;
3356         struct kvec     *iov = rcvbuf->head;
3357         size_t          hdrlen;
3358         u32             recvd, pglen = rcvbuf->page_len;
3359         __be32          *end, *entry, *p, *kaddr;
3360         unsigned int    nr = 0;
3361         int             status;
3362
3363         status = decode_op_hdr(xdr, OP_READDIR);
3364         if (status)
3365                 return status;
3366         READ_BUF(8);
3367         COPYMEM(readdir->verifier.data, 8);
3368         dprintk("%s: verifier = %08x:%08x\n",
3369                         __func__,
3370                         ((u32 *)readdir->verifier.data)[0],
3371                         ((u32 *)readdir->verifier.data)[1]);
3372
3373
3374         hdrlen = (char *) p - (char *) iov->iov_base;
3375         recvd = rcvbuf->len - hdrlen;
3376         if (pglen > recvd)
3377                 pglen = recvd;
3378         xdr_read_pages(xdr, pglen);
3379
3380         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3381         kaddr = p = kmap_atomic(page, KM_USER0);
3382         end = p + ((pglen + readdir->pgbase) >> 2);
3383         entry = p;
3384
3385         /* Make sure the packet actually has a value_follows and EOF entry */
3386         if ((entry + 1) > end)
3387                 goto short_pkt;
3388
3389         for (; *p++; nr++) {
3390                 u32 len, attrlen, xlen;
3391                 if (end - p < 3)
3392                         goto short_pkt;
3393                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3394                 p += 2;                 /* cookie */
3395                 len = ntohl(*p++);      /* filename length */
3396                 if (len > NFS4_MAXNAMLEN) {
3397                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3398                                         len);
3399                         goto err_unmap;
3400                 }
3401                 xlen = XDR_QUADLEN(len);
3402                 if (end - p < xlen + 1)
3403                         goto short_pkt;
3404                 dprintk("filename = %*s\n", len, (char *)p);
3405                 p += xlen;
3406                 len = ntohl(*p++);      /* bitmap length */
3407                 if (end - p < len + 1)
3408                         goto short_pkt;
3409                 p += len;
3410                 attrlen = XDR_QUADLEN(ntohl(*p++));
3411                 if (end - p < attrlen + 2)
3412                         goto short_pkt;
3413                 p += attrlen;           /* attributes */
3414                 entry = p;
3415         }
3416         /*
3417          * Apparently some server sends responses that are a valid size, but
3418          * contain no entries, and have value_follows==0 and EOF==0. For
3419          * those, just set the EOF marker.
3420          */
3421         if (!nr && entry[1] == 0) {
3422                 dprintk("NFS: readdir reply truncated!\n");
3423                 entry[1] = 1;
3424         }
3425 out:
3426         kunmap_atomic(kaddr, KM_USER0);
3427         return 0;
3428 short_pkt:
3429         /*
3430          * When we get a short packet there are 2 possibilities. We can
3431          * return an error, or fix up the response to look like a valid
3432          * response and return what we have so far. If there are no
3433          * entries and the packet was short, then return -EIO. If there
3434          * are valid entries in the response, return them and pretend that
3435          * the call was successful, but incomplete. The caller can retry the
3436          * readdir starting at the last cookie.
3437          */
3438         dprintk("%s: short packet at entry %d\n", __func__, nr);
3439         entry[0] = entry[1] = 0;
3440         if (nr)
3441                 goto out;
3442 err_unmap:
3443         kunmap_atomic(kaddr, KM_USER0);
3444         return -errno_NFSERR_IO;
3445 }
3446
3447 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3448 {
3449         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3450         struct kvec *iov = rcvbuf->head;
3451         size_t hdrlen;
3452         u32 len, recvd;
3453         __be32 *p;
3454         char *kaddr;
3455         int status;
3456
3457         status = decode_op_hdr(xdr, OP_READLINK);
3458         if (status)
3459                 return status;
3460
3461         /* Convert length of symlink */
3462         READ_BUF(4);
3463         READ32(len);
3464         if (len >= rcvbuf->page_len || len <= 0) {
3465                 dprintk("nfs: server returned giant symlink!\n");
3466                 return -ENAMETOOLONG;
3467         }
3468         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3469         recvd = req->rq_rcv_buf.len - hdrlen;
3470         if (recvd < len) {
3471                 dprintk("NFS: server cheating in readlink reply: "
3472                                 "count %u > recvd %u\n", len, recvd);
3473                 return -EIO;
3474         }
3475         xdr_read_pages(xdr, len);
3476         /*
3477          * The XDR encode routine has set things up so that
3478          * the link text will be copied directly into the
3479          * buffer.  We just have to do overflow-checking,
3480          * and and null-terminate the text (the VFS expects
3481          * null-termination).
3482          */
3483         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3484         kaddr[len+rcvbuf->page_base] = '\0';
3485         kunmap_atomic(kaddr, KM_USER0);
3486         return 0;
3487 }
3488
3489 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3490 {
3491         int status;
3492
3493         status = decode_op_hdr(xdr, OP_REMOVE);
3494         if (status)
3495                 goto out;
3496         status = decode_change_info(xdr, cinfo);
3497 out:
3498         return status;
3499 }
3500
3501 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3502               struct nfs4_change_info *new_cinfo)
3503 {
3504         int status;
3505
3506         status = decode_op_hdr(xdr, OP_RENAME);
3507         if (status)
3508                 goto out;
3509         if ((status = decode_change_info(xdr, old_cinfo)))
3510                 goto out;
3511         status = decode_change_info(xdr, new_cinfo);
3512 out:
3513         return status;
3514 }
3515
3516 static int decode_renew(struct xdr_stream *xdr)
3517 {
3518         return decode_op_hdr(xdr, OP_RENEW);
3519 }
3520
3521 static int
3522 decode_restorefh(struct xdr_stream *xdr)
3523 {
3524         return decode_op_hdr(xdr, OP_RESTOREFH);
3525 }
3526
3527 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3528                 size_t *acl_len)
3529 {
3530         __be32 *savep;
3531         uint32_t attrlen,
3532                  bitmap[2] = {0};
3533         struct kvec *iov = req->rq_rcv_buf.head;
3534         int status;
3535
3536         *acl_len = 0;
3537         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3538                 goto out;
3539         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3540                 goto out;
3541         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3542                 goto out;
3543
3544         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3545                 return -EIO;
3546         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3547                 size_t hdrlen;
3548                 u32 recvd;
3549
3550                 /* We ignore &savep and don't do consistency checks on
3551                  * the attr length.  Let userspace figure it out.... */
3552                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3553                 recvd = req->rq_rcv_buf.len - hdrlen;
3554                 if (attrlen > recvd) {
3555                         dprintk("NFS: server cheating in getattr"
3556                                         " acl reply: attrlen %u > recvd %u\n",
3557                                         attrlen, recvd);
3558                         return -EINVAL;
3559                 }
3560                 xdr_read_pages(xdr, attrlen);
3561                 *acl_len = attrlen;
3562         } else
3563                 status = -EOPNOTSUPP;
3564
3565 out:
3566         return status;
3567 }
3568
3569 static int
3570 decode_savefh(struct xdr_stream *xdr)
3571 {
3572         return decode_op_hdr(xdr, OP_SAVEFH);
3573 }
3574
3575 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3576 {
3577         __be32 *p;
3578         uint32_t bmlen;
3579         int status;
3580
3581         status = decode_op_hdr(xdr, OP_SETATTR);
3582         if (status)
3583                 return status;
3584         READ_BUF(4);
3585         READ32(bmlen);
3586         READ_BUF(bmlen << 2);
3587         return 0;
3588 }
3589
3590 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3591 {
3592         __be32 *p;
3593         uint32_t opnum;
3594         int32_t nfserr;
3595
3596         READ_BUF(8);
3597         READ32(opnum);
3598         if (opnum != OP_SETCLIENTID) {
3599                 dprintk("nfs: decode_setclientid: Server returned operation"
3600                         " %d\n", opnum);
3601                 return -EIO;
3602         }
3603         READ32(nfserr);
3604         if (nfserr == NFS_OK) {
3605                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3606                 READ64(clp->cl_clientid);
3607                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3608         } else if (nfserr == NFSERR_CLID_INUSE) {
3609                 uint32_t len;
3610
3611                 /* skip netid string */
3612                 READ_BUF(4);
3613                 READ32(len);
3614                 READ_BUF(len);
3615
3616                 /* skip uaddr string */
3617                 READ_BUF(4);
3618                 READ32(len);
3619                 READ_BUF(len);
3620                 return -NFSERR_CLID_INUSE;
3621         } else
3622                 return nfs4_stat_to_errno(nfserr);
3623
3624         return 0;
3625 }
3626
3627 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3628 {
3629         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3630 }
3631
3632 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3633 {
3634         __be32 *p;
3635         int status;
3636
3637         status = decode_op_hdr(xdr, OP_WRITE);
3638         if (status)
3639                 return status;
3640
3641         READ_BUF(16);
3642         READ32(res->count);
3643         READ32(res->verf->committed);
3644         COPYMEM(res->verf->verifier, 8);
3645         return 0;
3646 }
3647
3648 static int decode_delegreturn(struct xdr_stream *xdr)
3649 {
3650         return decode_op_hdr(xdr, OP_DELEGRETURN);
3651 }
3652
3653 /*
3654  * END OF "GENERIC" DECODE ROUTINES.
3655  */
3656
3657 /*
3658  * Decode OPEN_DOWNGRADE response
3659  */
3660 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3661 {
3662         struct xdr_stream xdr;
3663         struct compound_hdr hdr;
3664         int status;
3665
3666         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3667         status = decode_compound_hdr(&xdr, &hdr);
3668         if (status)
3669                 goto out;
3670         status = decode_putfh(&xdr);
3671         if (status)
3672                 goto out;
3673         status = decode_open_downgrade(&xdr, res);
3674         if (status != 0)
3675                 goto out;
3676         decode_getfattr(&xdr, res->fattr, res->server);
3677 out:
3678         return status;
3679 }
3680
3681 /*
3682  * Decode ACCESS response
3683  */
3684 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3685 {
3686         struct xdr_stream xdr;
3687         struct compound_hdr hdr;
3688         int status;
3689
3690         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3691         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3692                 goto out;
3693         status = decode_putfh(&xdr);
3694         if (status != 0)
3695                 goto out;
3696         status = decode_access(&xdr, res);
3697         if (status != 0)
3698                 goto out;
3699         decode_getfattr(&xdr, res->fattr, res->server);
3700 out:
3701         return status;
3702 }
3703
3704 /*
3705  * Decode LOOKUP response
3706  */
3707 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3708 {
3709         struct xdr_stream xdr;
3710         struct compound_hdr hdr;
3711         int status;
3712
3713         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3714         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3715                 goto out;
3716         if ((status = decode_putfh(&xdr)) != 0)
3717                 goto out;
3718         if ((status = decode_lookup(&xdr)) != 0)
3719                 goto out;
3720         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3721                 goto out;
3722         status = decode_getfattr(&xdr, res->fattr, res->server);
3723 out:
3724         return status;
3725 }
3726
3727 /*
3728  * Decode LOOKUP_ROOT response
3729  */
3730 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3731 {
3732         struct xdr_stream xdr;
3733         struct compound_hdr hdr;
3734         int status;
3735
3736         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3737         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3738                 goto out;
3739         if ((status = decode_putrootfh(&xdr)) != 0)
3740                 goto out;
3741         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3742                 status = decode_getfattr(&xdr, res->fattr, res->server);
3743 out:
3744         return status;
3745 }
3746
3747 /*
3748  * Decode REMOVE response
3749  */
3750 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3751 {
3752         struct xdr_stream xdr;
3753         struct compound_hdr hdr;
3754         int status;
3755
3756         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3757         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3758                 goto out;
3759         if ((status = decode_putfh(&xdr)) != 0)
3760                 goto out;
3761         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3762                 goto out;
3763         decode_getfattr(&xdr, &res->dir_attr, res->server);
3764 out:
3765         return status;
3766 }
3767
3768 /*
3769  * Decode RENAME response
3770  */
3771 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3772 {
3773         struct xdr_stream xdr;
3774         struct compound_hdr hdr;
3775         int status;
3776
3777         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3778         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3779                 goto out;
3780         if ((status = decode_putfh(&xdr)) != 0)
3781                 goto out;
3782         if ((status = decode_savefh(&xdr)) != 0)
3783                 goto out;
3784         if ((status = decode_putfh(&xdr)) != 0)
3785                 goto out;
3786         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3787                 goto out;
3788         /* Current FH is target directory */
3789         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3790                 goto out;
3791         if ((status = decode_restorefh(&xdr)) != 0)
3792                 goto out;
3793         decode_getfattr(&xdr, res->old_fattr, res->server);
3794 out:
3795         return status;
3796 }
3797
3798 /*
3799  * Decode LINK response
3800  */
3801 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3802 {
3803         struct xdr_stream xdr;
3804         struct compound_hdr hdr;
3805         int status;
3806
3807         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3808         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3809                 goto out;
3810         if ((status = decode_putfh(&xdr)) != 0)
3811                 goto out;
3812         if ((status = decode_savefh(&xdr)) != 0)
3813                 goto out;
3814         if ((status = decode_putfh(&xdr)) != 0)
3815                 goto out;
3816         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3817                 goto out;
3818         /*
3819          * Note order: OP_LINK leaves the directory as the current
3820          *             filehandle.
3821          */
3822         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3823                 goto out;
3824         if ((status = decode_restorefh(&xdr)) != 0)
3825                 goto out;
3826         decode_getfattr(&xdr, res->fattr, res->server);
3827 out:
3828         return status;
3829 }
3830
3831 /*
3832  * Decode CREATE response
3833  */
3834 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3835 {
3836         struct xdr_stream xdr;
3837         struct compound_hdr hdr;
3838         int status;
3839
3840         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3841         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3842                 goto out;
3843         if ((status = decode_putfh(&xdr)) != 0)
3844                 goto out;
3845         if ((status = decode_savefh(&xdr)) != 0)
3846                 goto out;
3847         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3848                 goto out;
3849         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3850                 goto out;
3851         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3852                 goto out;
3853         if ((status = decode_restorefh(&xdr)) != 0)
3854                 goto out;
3855         decode_getfattr(&xdr, res->dir_fattr, res->server);
3856 out:
3857         return status;
3858 }
3859
3860 /*
3861  * Decode SYMLINK response
3862  */
3863 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3864 {
3865         return nfs4_xdr_dec_create(rqstp, p, res);
3866 }
3867
3868 /*
3869  * Decode GETATTR response
3870  */
3871 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3872 {
3873         struct xdr_stream xdr;
3874         struct compound_hdr hdr;
3875         int status;
3876
3877         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3878         status = decode_compound_hdr(&xdr, &hdr);
3879         if (status)
3880                 goto out;
3881         status = decode_putfh(&xdr);
3882         if (status)
3883                 goto out;
3884         status = decode_getfattr(&xdr, res->fattr, res->server);
3885 out:
3886         return status;
3887 }
3888
3889 /*
3890  * Encode an SETACL request
3891  */
3892 static int
3893 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3894 {
3895         struct xdr_stream xdr;
3896         struct compound_hdr hdr = {
3897                 .nops   = 0,
3898         };
3899         int status;
3900
3901         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3902         encode_compound_hdr(&xdr, &hdr);
3903         encode_putfh(&xdr, args->fh, &hdr);
3904         status = encode_setacl(&xdr, args, &hdr);
3905         encode_nops(&hdr);
3906         return status;
3907 }
3908
3909 /*
3910  * Decode SETACL response
3911  */
3912 static int
3913 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
3914 {
3915         struct xdr_stream xdr;
3916         struct compound_hdr hdr;
3917         int status;
3918
3919         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3920         status = decode_compound_hdr(&xdr, &hdr);
3921         if (status)
3922                 goto out;
3923         status = decode_putfh(&xdr);
3924         if (status)
3925                 goto out;
3926         status = decode_setattr(&xdr, res);
3927 out:
3928         return status;
3929 }
3930
3931 /*
3932  * Decode GETACL response
3933  */
3934 static int
3935 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
3936 {
3937         struct xdr_stream xdr;
3938         struct compound_hdr hdr;
3939         int status;
3940
3941         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3942         status = decode_compound_hdr(&xdr, &hdr);
3943         if (status)
3944                 goto out;
3945         status = decode_putfh(&xdr);
3946         if (status)
3947                 goto out;
3948         status = decode_getacl(&xdr, rqstp, acl_len);
3949
3950 out:
3951         return status;
3952 }
3953
3954 /*
3955  * Decode CLOSE response
3956  */
3957 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3958 {
3959         struct xdr_stream xdr;
3960         struct compound_hdr hdr;
3961         int status;
3962
3963         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3964         status = decode_compound_hdr(&xdr, &hdr);
3965         if (status)
3966                 goto out;
3967         status = decode_putfh(&xdr);
3968         if (status)
3969                 goto out;
3970         status = decode_close(&xdr, res);
3971         if (status != 0)
3972                 goto out;
3973         /*
3974          * Note: Server may do delete on close for this file
3975          *      in which case the getattr call will fail with
3976          *      an ESTALE error. Shouldn't be a problem,
3977          *      though, since fattr->valid will remain unset.
3978          */
3979         decode_getfattr(&xdr, res->fattr, res->server);
3980 out:
3981         return status;
3982 }
3983
3984 /*
3985  * Decode OPEN response
3986  */
3987 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
3988 {
3989         struct xdr_stream xdr;
3990         struct compound_hdr hdr;
3991         int status;
3992
3993         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3994         status = decode_compound_hdr(&xdr, &hdr);
3995         if (status)
3996                 goto out;
3997         status = decode_putfh(&xdr);
3998         if (status)
3999                 goto out;
4000         status = decode_savefh(&xdr);
4001         if (status)
4002                 goto out;
4003         status = decode_open(&xdr, res);
4004         if (status)
4005                 goto out;
4006         if (decode_getfh(&xdr, &res->fh) != 0)
4007                 goto out;
4008         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4009                 goto out;
4010         if (decode_restorefh(&xdr) != 0)
4011                 goto out;
4012         decode_getfattr(&xdr, res->dir_attr, res->server);
4013 out:
4014         return status;
4015 }
4016
4017 /*
4018  * Decode OPEN_CONFIRM response
4019  */
4020 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4021 {
4022         struct xdr_stream xdr;
4023         struct compound_hdr hdr;
4024         int status;
4025
4026         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4027         status = decode_compound_hdr(&xdr, &hdr);
4028         if (status)
4029                 goto out;
4030         status = decode_putfh(&xdr);
4031         if (status)
4032                 goto out;
4033         status = decode_open_confirm(&xdr, res);
4034 out:
4035         return status;
4036 }
4037
4038 /*
4039  * Decode OPEN response
4040  */
4041 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4042 {
4043         struct xdr_stream xdr;
4044         struct compound_hdr hdr;
4045         int status;
4046
4047         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4048         status = decode_compound_hdr(&xdr, &hdr);
4049         if (status)
4050                 goto out;
4051         status = decode_putfh(&xdr);
4052         if (status)
4053                 goto out;
4054         status = decode_open(&xdr, res);
4055         if (status)
4056                 goto out;
4057         decode_getfattr(&xdr, res->f_attr, res->server);
4058 out:
4059         return status;
4060 }
4061
4062 /*
4063  * Decode SETATTR response
4064  */
4065 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4066 {
4067         struct xdr_stream xdr;
4068         struct compound_hdr hdr;
4069         int status;
4070
4071         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4072         status = decode_compound_hdr(&xdr, &hdr);
4073         if (status)
4074                 goto out;
4075         status = decode_putfh(&xdr);
4076         if (status)
4077                 goto out;
4078         status = decode_setattr(&xdr, res);
4079         if (status)
4080                 goto out;
4081         status = decode_getfattr(&xdr, res->fattr, res->server);
4082         if (status == NFS4ERR_DELAY)
4083                 status = 0;
4084 out:
4085         return status;
4086 }
4087
4088 /*
4089  * Decode LOCK response
4090  */
4091 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4092 {
4093         struct xdr_stream xdr;
4094         struct compound_hdr hdr;
4095         int status;
4096
4097         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4098         status = decode_compound_hdr(&xdr, &hdr);
4099         if (status)
4100                 goto out;
4101         status = decode_putfh(&xdr);
4102         if (status)
4103                 goto out;
4104         status = decode_lock(&xdr, res);
4105 out:
4106         return status;
4107 }
4108
4109 /*
4110  * Decode LOCKT response
4111  */
4112 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4113 {
4114         struct xdr_stream xdr;
4115         struct compound_hdr hdr;
4116         int status;
4117
4118         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4119         status = decode_compound_hdr(&xdr, &hdr);
4120         if (status)
4121                 goto out;
4122         status = decode_putfh(&xdr);
4123         if (status)
4124                 goto out;
4125         status = decode_lockt(&xdr, res);
4126 out:
4127         return status;
4128 }
4129
4130 /*
4131  * Decode LOCKU response
4132  */
4133 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4134 {
4135         struct xdr_stream xdr;
4136         struct compound_hdr hdr;
4137         int status;
4138
4139         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4140         status = decode_compound_hdr(&xdr, &hdr);
4141         if (status)
4142                 goto out;
4143         status = decode_putfh(&xdr);
4144         if (status)
4145                 goto out;
4146         status = decode_locku(&xdr, res);
4147 out:
4148         return status;
4149 }
4150
4151 /*
4152  * Decode READLINK response
4153  */
4154 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4155 {
4156         struct xdr_stream xdr;
4157         struct compound_hdr hdr;
4158         int status;
4159
4160         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4161         status = decode_compound_hdr(&xdr, &hdr);
4162         if (status)
4163                 goto out;
4164         status = decode_putfh(&xdr);
4165         if (status)
4166                 goto out;
4167         status = decode_readlink(&xdr, rqstp);
4168 out:
4169         return status;
4170 }
4171
4172 /*
4173  * Decode READDIR response
4174  */
4175 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4176 {
4177         struct xdr_stream xdr;
4178         struct compound_hdr hdr;
4179         int status;
4180
4181         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4182         status = decode_compound_hdr(&xdr, &hdr);
4183         if (status)
4184                 goto out;
4185         status = decode_putfh(&xdr);
4186         if (status)
4187                 goto out;
4188         status = decode_readdir(&xdr, rqstp, res);
4189 out:
4190         return status;
4191 }
4192
4193 /*
4194  * Decode Read response
4195  */
4196 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4197 {
4198         struct xdr_stream xdr;
4199         struct compound_hdr hdr;
4200         int status;
4201
4202         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4203         status = decode_compound_hdr(&xdr, &hdr);
4204         if (status)
4205                 goto out;
4206         status = decode_putfh(&xdr);
4207         if (status)
4208                 goto out;
4209         status = decode_read(&xdr, rqstp, res);
4210         if (!status)
4211                 status = res->count;
4212 out:
4213         return status;
4214 }
4215
4216 /*
4217  * Decode WRITE response
4218  */
4219 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4220 {
4221         struct xdr_stream xdr;
4222         struct compound_hdr hdr;
4223         int status;
4224
4225         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4226         status = decode_compound_hdr(&xdr, &hdr);
4227         if (status)
4228                 goto out;
4229         status = decode_putfh(&xdr);
4230         if (status)
4231                 goto out;
4232         status = decode_write(&xdr, res);
4233         if (status)
4234                 goto out;
4235         decode_getfattr(&xdr, res->fattr, res->server);
4236         if (!status)
4237                 status = res->count;
4238 out:
4239         return status;
4240 }
4241
4242 /*
4243  * Decode COMMIT response
4244  */
4245 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4246 {
4247         struct xdr_stream xdr;
4248         struct compound_hdr hdr;
4249         int status;
4250
4251         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4252         status = decode_compound_hdr(&xdr, &hdr);
4253         if (status)
4254                 goto out;
4255         status = decode_putfh(&xdr);
4256         if (status)
4257                 goto out;
4258         status = decode_commit(&xdr, res);
4259         if (status)
4260                 goto out;
4261         decode_getfattr(&xdr, res->fattr, res->server);
4262 out:
4263         return status;
4264 }
4265
4266 /*
4267  * FSINFO request
4268  */
4269 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4270 {
4271         struct xdr_stream xdr;
4272         struct compound_hdr hdr;
4273         int status;
4274
4275         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4276         status = decode_compound_hdr(&xdr, &hdr);
4277         if (!status)
4278                 status = decode_putfh(&xdr);
4279         if (!status)
4280                 status = decode_fsinfo(&xdr, fsinfo);
4281         return status;
4282 }
4283
4284 /*
4285  * PATHCONF request
4286  */
4287 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4288 {
4289         struct xdr_stream xdr;
4290         struct compound_hdr hdr;
4291         int status;
4292
4293         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4294         status = decode_compound_hdr(&xdr, &hdr);
4295         if (!status)
4296                 status = decode_putfh(&xdr);
4297         if (!status)
4298                 status = decode_pathconf(&xdr, pathconf);
4299         return status;
4300 }
4301
4302 /*
4303  * STATFS request
4304  */
4305 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4306 {
4307         struct xdr_stream xdr;
4308         struct compound_hdr hdr;
4309         int status;
4310
4311         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4312         status = decode_compound_hdr(&xdr, &hdr);
4313         if (!status)
4314                 status = decode_putfh(&xdr);
4315         if (!status)
4316                 status = decode_statfs(&xdr, fsstat);
4317         return status;
4318 }
4319
4320 /*
4321  * GETATTR_BITMAP request
4322  */
4323 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4324 {
4325         struct xdr_stream xdr;
4326         struct compound_hdr hdr;
4327         int status;
4328
4329         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4330         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4331                 goto out;
4332         if ((status = decode_putfh(&xdr)) != 0)
4333                 goto out;
4334         status = decode_server_caps(&xdr, res);
4335 out:
4336         return status;
4337 }
4338
4339 /*
4340  * Decode RENEW response
4341  */
4342 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4343 {
4344         struct xdr_stream xdr;
4345         struct compound_hdr hdr;
4346         int status;
4347
4348         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4349         status = decode_compound_hdr(&xdr, &hdr);
4350         if (!status)
4351                 status = decode_renew(&xdr);
4352         return status;
4353 }
4354
4355 /*
4356  * a SETCLIENTID request
4357  */
4358 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4359                 struct nfs_client *clp)
4360 {
4361         struct xdr_stream xdr;
4362         struct compound_hdr hdr;
4363         int status;
4364
4365         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4366         status = decode_compound_hdr(&xdr, &hdr);
4367         if (!status)
4368                 status = decode_setclientid(&xdr, clp);
4369         return status;
4370 }
4371
4372 /*
4373  * a SETCLIENTID_CONFIRM request
4374  */
4375 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4376 {
4377         struct xdr_stream xdr;
4378         struct compound_hdr hdr;
4379         int status;
4380
4381         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4382         status = decode_compound_hdr(&xdr, &hdr);
4383         if (!status)
4384                 status = decode_setclientid_confirm(&xdr);
4385         if (!status)
4386                 status = decode_putrootfh(&xdr);
4387         if (!status)
4388                 status = decode_fsinfo(&xdr, fsinfo);
4389         return status;
4390 }
4391
4392 /*
4393  * DELEGRETURN request
4394  */
4395 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4396 {
4397         struct xdr_stream xdr;
4398         struct compound_hdr hdr;
4399         int status;
4400
4401         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4402         status = decode_compound_hdr(&xdr, &hdr);
4403         if (status != 0)
4404                 goto out;
4405         status = decode_putfh(&xdr);
4406         if (status != 0)
4407                 goto out;
4408         status = decode_delegreturn(&xdr);
4409         decode_getfattr(&xdr, res->fattr, res->server);
4410 out:
4411         return status;
4412 }
4413
4414 /*
4415  * FS_LOCATIONS request
4416  */
4417 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4418 {
4419         struct xdr_stream xdr;
4420         struct compound_hdr hdr;
4421         int status;
4422
4423         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4424         status = decode_compound_hdr(&xdr, &hdr);
4425         if (status != 0)
4426                 goto out;
4427         if ((status = decode_putfh(&xdr)) != 0)
4428                 goto out;
4429         if ((status = decode_lookup(&xdr)) != 0)
4430                 goto out;
4431         xdr_enter_page(&xdr, PAGE_SIZE);
4432         status = decode_getfattr(&xdr, &res->fattr, res->server);
4433 out:
4434         return status;
4435 }
4436
4437 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4438 {
4439         uint32_t bitmap[2] = {0};
4440         uint32_t len;
4441
4442         if (!*p++) {
4443                 if (!*p)
4444                         return ERR_PTR(-EAGAIN);
4445                 entry->eof = 1;
4446                 return ERR_PTR(-EBADCOOKIE);
4447         }
4448
4449         entry->prev_cookie = entry->cookie;
4450         p = xdr_decode_hyper(p, &entry->cookie);
4451         entry->len = ntohl(*p++);
4452         entry->name = (const char *) p;
4453         p += XDR_QUADLEN(entry->len);
4454
4455         /*
4456          * In case the server doesn't return an inode number,
4457          * we fake one here.  (We don't use inode number 0,
4458          * since glibc seems to choke on it...)
4459          */
4460         entry->ino = 1;
4461
4462         len = ntohl(*p++);              /* bitmap length */
4463         if (len-- > 0) {
4464                 bitmap[0] = ntohl(*p++);
4465                 if (len-- > 0) {
4466                         bitmap[1] = ntohl(*p++);
4467                         p += len;
4468                 }
4469         }
4470         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4471         if (len > 0) {
4472                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4473                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4474                         /* Ignore the return value of rdattr_error for now */
4475                         p++;
4476                         len--;
4477                 }
4478                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4479                         xdr_decode_hyper(p, &entry->ino);
4480                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4481                         xdr_decode_hyper(p, &entry->ino);
4482                 p += len;
4483         }
4484
4485         entry->eof = !p[0] && p[1];
4486         return p;
4487 }
4488
4489 /*
4490  * We need to translate between nfs status return values and
4491  * the local errno values which may not be the same.
4492  */
4493 static struct {
4494         int stat;
4495         int errno;
4496 } nfs_errtbl[] = {
4497         { NFS4_OK,              0               },
4498         { NFS4ERR_PERM,         -EPERM          },
4499         { NFS4ERR_NOENT,        -ENOENT         },
4500         { NFS4ERR_IO,           -errno_NFSERR_IO},
4501         { NFS4ERR_NXIO,         -ENXIO          },
4502         { NFS4ERR_ACCESS,       -EACCES         },
4503         { NFS4ERR_EXIST,        -EEXIST         },
4504         { NFS4ERR_XDEV,         -EXDEV          },
4505         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4506         { NFS4ERR_ISDIR,        -EISDIR         },
4507         { NFS4ERR_INVAL,        -EINVAL         },
4508         { NFS4ERR_FBIG,         -EFBIG          },
4509         { NFS4ERR_NOSPC,        -ENOSPC         },
4510         { NFS4ERR_ROFS,         -EROFS          },
4511         { NFS4ERR_MLINK,        -EMLINK         },
4512         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4513         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4514         { NFS4ERR_DQUOT,        -EDQUOT         },
4515         { NFS4ERR_STALE,        -ESTALE         },
4516         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4517         { NFS4ERR_BADOWNER,     -EINVAL         },
4518         { NFS4ERR_BADNAME,      -EINVAL         },
4519         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4520         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4521         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4522         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4523         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4524         { NFS4ERR_LOCKED,       -EAGAIN         },
4525         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4526         { NFS4ERR_SYMLINK,      -ELOOP          },
4527         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4528         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4529         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4530                                                     * to be handled by a
4531                                                     * middle-layer.
4532                                                     */
4533         { -1,                   -EIO            }
4534 };
4535
4536 /*
4537  * Convert an NFS error code to a local one.
4538  * This one is used jointly by NFSv2 and NFSv3.
4539  */
4540 static int
4541 nfs4_stat_to_errno(int stat)
4542 {
4543         int i;
4544         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4545                 if (nfs_errtbl[i].stat == stat)
4546                         return nfs_errtbl[i].errno;
4547         }
4548         if (stat <= 10000 || stat > 10100) {
4549                 /* The server is looney tunes. */
4550                 return -ESERVERFAULT;
4551         }
4552         /* If we cannot translate the error, the recovery routines should
4553          * handle it.
4554          * Note: remaining NFSv4 error codes have values > 10000, so should
4555          * not conflict with native Linux error codes.
4556          */
4557         return -stat;
4558 }
4559
4560 #define PROC(proc, argtype, restype)                            \
4561 [NFSPROC4_CLNT_##proc] = {                                      \
4562         .p_proc   = NFSPROC4_COMPOUND,                          \
4563         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4564         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4565         .p_arglen = NFS4_##argtype##_sz,                        \
4566         .p_replen = NFS4_##restype##_sz,                        \
4567         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4568         .p_name   = #proc,                                      \
4569 }
4570
4571 struct rpc_procinfo     nfs4_procedures[] = {
4572   PROC(READ,            enc_read,       dec_read),
4573   PROC(WRITE,           enc_write,      dec_write),
4574   PROC(COMMIT,          enc_commit,     dec_commit),
4575   PROC(OPEN,            enc_open,       dec_open),
4576   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4577   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4578   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4579   PROC(CLOSE,           enc_close,      dec_close),
4580   PROC(SETATTR,         enc_setattr,    dec_setattr),
4581   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4582   PROC(RENEW,           enc_renew,      dec_renew),
4583   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4584   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4585   PROC(LOCK,            enc_lock,       dec_lock),
4586   PROC(LOCKT,           enc_lockt,      dec_lockt),
4587   PROC(LOCKU,           enc_locku,      dec_locku),
4588   PROC(ACCESS,          enc_access,     dec_access),
4589   PROC(GETATTR,         enc_getattr,    dec_getattr),
4590   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4591   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4592   PROC(REMOVE,          enc_remove,     dec_remove),
4593   PROC(RENAME,          enc_rename,     dec_rename),
4594   PROC(LINK,            enc_link,       dec_link),
4595   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4596   PROC(CREATE,          enc_create,     dec_create),
4597   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4598   PROC(STATFS,          enc_statfs,     dec_statfs),
4599   PROC(READLINK,        enc_readlink,   dec_readlink),
4600   PROC(READDIR,         enc_readdir,    dec_readdir),
4601   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4602   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4603   PROC(GETACL,          enc_getacl,     dec_getacl),
4604   PROC(SETACL,          enc_setacl,     dec_setacl),
4605   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4606 };
4607
4608 struct rpc_version              nfs_version4 = {
4609         .number                 = 4,
4610         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4611         .procs                  = nfs4_procedures
4612 };
4613
4614 /*
4615  * Local variables:
4616  *  c-basic-offset: 8
4617  * End:
4618  */