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

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 196                                 2 * nfs4_name_maxsz)
 197 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 198 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 199                                 nfs4_name_maxsz)
 200 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 201 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 202                                  7 + \
 203                                  1 + encode_stateid_maxsz + 8)
 204 #define decode_lock_denied_maxsz \
 205                                 (8 + decode_lockowner_maxsz)
 206 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 207                                  decode_lock_denied_maxsz)
 208 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 209 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 212                                  encode_stateid_maxsz + \
 213                                  4)
 214 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_stateid_maxsz)
 216 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 217 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 218 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 219                                 1 + nfs4_name_maxsz + \
 220                                 1 + \
 221                                 nfs4_fattr_maxsz)
 222 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 223 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 224                                 1 + 2 + nfs4_name_maxsz + \
 225                                 encode_attrs_maxsz)
 226 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 nfs4_fattr_bitmap_maxsz)
 229 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 230 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 233 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 234 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 235                                  nfs4_fattr_bitmap_maxsz + 1)
 236 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 237                                  encode_stateid_maxsz + 3)
 238 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 239 #define encode_fs_locations_maxsz \
 240                                 (encode_getattr_maxsz)
 241 #define decode_fs_locations_maxsz \
 242                                 (0)
 243 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 244 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 245 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 246                                 encode_putfh_maxsz + \
 247                                 encode_read_maxsz)
 248 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 249                                 decode_putfh_maxsz + \
 250                                 decode_read_maxsz)
 251 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 252                                 encode_putfh_maxsz + \
 253                                 encode_readlink_maxsz)
 254 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 decode_readlink_maxsz)
 257 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 258                                 encode_putfh_maxsz + \
 259                                 encode_readdir_maxsz)
 260 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_readdir_maxsz)
 263 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 264                                 encode_putfh_maxsz + \
 265                                 encode_write_maxsz + \
 266                                 encode_getattr_maxsz)
 267 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_write_maxsz + \
 270                                 decode_getattr_maxsz)
 271 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 encode_commit_maxsz + \
 274                                 encode_getattr_maxsz)
 275 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 276                                 decode_putfh_maxsz + \
 277                                 decode_commit_maxsz + \
 278                                 decode_getattr_maxsz)
 279 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_putfh_maxsz + \
 281                                 encode_savefh_maxsz + \
 282                                 encode_open_maxsz + \
 283                                 encode_getfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 encode_restorefh_maxsz + \
 286                                 encode_getattr_maxsz)
 287 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 288                                 decode_putfh_maxsz + \
 289                                 decode_savefh_maxsz + \
 290                                 decode_open_maxsz + \
 291                                 decode_getfh_maxsz + \
 292                                 decode_getattr_maxsz + \
 293                                 decode_restorefh_maxsz + \
 294                                 decode_getattr_maxsz)
 295 #define NFS4_enc_open_confirm_sz \
 296                                 (compound_encode_hdr_maxsz + \
 297                                  encode_putfh_maxsz + \
 298                                  encode_open_confirm_maxsz)
 299 #define NFS4_dec_open_confirm_sz \
 300                                 (compound_decode_hdr_maxsz + \
 301                                  decode_putfh_maxsz + \
 302                                  decode_open_confirm_maxsz)
 303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 304                                         encode_putfh_maxsz + \
 305                                         encode_open_maxsz + \
 306                                         encode_getattr_maxsz)
 307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 308                                         decode_putfh_maxsz + \
 309                                         decode_open_maxsz + \
 310                                         decode_getattr_maxsz)
 311 #define NFS4_enc_open_downgrade_sz \
 312                                 (compound_encode_hdr_maxsz + \
 313                                  encode_putfh_maxsz + \
 314                                  encode_open_downgrade_maxsz + \
 315                                  encode_getattr_maxsz)
 316 #define NFS4_dec_open_downgrade_sz \
 317                                 (compound_decode_hdr_maxsz + \
 318                                  decode_putfh_maxsz + \
 319                                  decode_open_downgrade_maxsz + \
 320                                  decode_getattr_maxsz)
 321 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 322                                  encode_putfh_maxsz + \
 323                                  encode_close_maxsz + \
 324                                  encode_getattr_maxsz)
 325 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 326                                  decode_putfh_maxsz + \
 327                                  decode_close_maxsz + \
 328                                  decode_getattr_maxsz)
 329 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 330                                  encode_putfh_maxsz + \
 331                                  encode_setattr_maxsz + \
 332                                  encode_getattr_maxsz)
 333 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 334                                  decode_putfh_maxsz + \
 335                                  decode_setattr_maxsz + \
 336                                  decode_getattr_maxsz)
 337 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_fsinfo_maxsz)
 340 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_fsinfo_maxsz)
 343 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 344                                 encode_renew_maxsz)
 345 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 346                                 decode_renew_maxsz)
 347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 348                                 encode_setclientid_maxsz)
 349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 350                                 decode_setclientid_maxsz)
 351 #define NFS4_enc_setclientid_confirm_sz \
 352                                 (compound_encode_hdr_maxsz + \
 353                                 encode_setclientid_confirm_maxsz + \
 354                                 encode_putrootfh_maxsz + \
 355                                 encode_fsinfo_maxsz)
 356 #define NFS4_dec_setclientid_confirm_sz \
 357                                 (compound_decode_hdr_maxsz + \
 358                                 decode_setclientid_confirm_maxsz + \
 359                                 decode_putrootfh_maxsz + \
 360                                 decode_fsinfo_maxsz)
 361 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_lock_maxsz)
 364 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_lock_maxsz)
 367 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_lockt_maxsz)
 370 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 371                                  decode_putfh_maxsz + \
 372                                  decode_lockt_maxsz)
 373 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_putfh_maxsz + \
 375                                 encode_locku_maxsz)
 376 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_locku_maxsz)
 379 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_access_maxsz + \
 382                                 encode_getattr_maxsz)
 383 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_access_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_getattr_maxsz)
 390 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 391                                 decode_putfh_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_lookup_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_getfh_maxsz)
 398 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 399                                 decode_putfh_maxsz + \
 400                                 decode_lookup_maxsz + \
 401                                 decode_getattr_maxsz + \
 402                                 decode_getfh_maxsz)
 403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 404                                 encode_putrootfh_maxsz + \
 405                                 encode_getattr_maxsz + \
 406                                 encode_getfh_maxsz)
 407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 408                                 decode_putrootfh_maxsz + \
 409                                 decode_getattr_maxsz + \
 410                                 decode_getfh_maxsz)
 411 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_remove_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_putfh_maxsz + \
 417                                 op_decode_hdr_maxsz + 5 + \
 418                                 decode_getattr_maxsz)
 419 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_savefh_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_rename_maxsz + \
 424                                 encode_getattr_maxsz + \
 425                                 encode_restorefh_maxsz + \
 426                                 encode_getattr_maxsz)
 427 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_savefh_maxsz + \
 430                                 decode_putfh_maxsz + \
 431                                 decode_rename_maxsz + \
 432                                 decode_getattr_maxsz + \
 433                                 decode_restorefh_maxsz + \
 434                                 decode_getattr_maxsz)
 435 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 436                                 encode_putfh_maxsz + \
 437                                 encode_savefh_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_link_maxsz + \
 440                                 decode_getattr_maxsz + \
 441                                 encode_restorefh_maxsz + \
 442                                 decode_getattr_maxsz)
 443 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_savefh_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_link_maxsz + \
 448                                 decode_getattr_maxsz + \
 449                                 decode_restorefh_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_putfh_maxsz + \
 453                                 encode_symlink_maxsz + \
 454                                 encode_getattr_maxsz + \
 455                                 encode_getfh_maxsz)
 456 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_symlink_maxsz + \
 459                                 decode_getattr_maxsz + \
 460                                 decode_getfh_maxsz)
 461 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_savefh_maxsz + \
 464                                 encode_create_maxsz + \
 465                                 encode_getfh_maxsz + \
 466                                 encode_getattr_maxsz + \
 467                                 encode_restorefh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_savefh_maxsz + \
 472                                 decode_create_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz + \
 475                                 decode_restorefh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 478                                 encode_putfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_statfs_maxsz)
 486 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_statfs_maxsz)
 489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_getattr_maxsz)
 492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_getattr_maxsz)
 495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 496                                 encode_putfh_maxsz + \
 497                                 encode_delegreturn_maxsz + \
 498                                 encode_getattr_maxsz)
 499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 500                                 decode_delegreturn_maxsz + \
 501                                 decode_getattr_maxsz)
 502 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_putfh_maxsz + \
 504                                 encode_getacl_maxsz)
 505 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_getacl_maxsz)
 508 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_setacl_maxsz)
 511 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 512                                 decode_putfh_maxsz + \
 513                                 decode_setacl_maxsz)
 514 #define NFS4_enc_fs_locations_sz \
 515                                 (compound_encode_hdr_maxsz + \
 516                                  encode_putfh_maxsz + \
 517                                  encode_lookup_maxsz + \
 518                                  encode_fs_locations_maxsz)
 519 #define NFS4_dec_fs_locations_sz \
 520                                 (compound_decode_hdr_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_lookup_maxsz + \
 523                                  decode_fs_locations_maxsz)
 524
 525 static const umode_t nfs_type2fmt[] = {
 526         [NF4BAD] = 0,
 527         [NF4REG] = S_IFREG,
 528         [NF4DIR] = S_IFDIR,
 529         [NF4BLK] = S_IFBLK,
 530         [NF4CHR] = S_IFCHR,
 531         [NF4LNK] = S_IFLNK,
 532         [NF4SOCK] = S_IFSOCK,
 533         [NF4FIFO] = S_IFIFO,
 534         [NF4ATTRDIR] = 0,
 535         [NF4NAMEDATTR] = 0,
 536 };
 537
 538 struct compound_hdr {
 539         int32_t         status;
 540         uint32_t        nops;
 541         __be32 *        nops_p;
 542         uint32_t        taglen;
 543         char *          tag;
 544 };
 545
 546 /*
 547  * START OF "GENERIC" ENCODE ROUTINES.
 548  *   These may look a little ugly since they are imported from a "generic"
 549  * set of XDR encode/decode routines which are intended to be shared by
 550  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 551  *
 552  * If the pain of reading these is too great, it should be a straightforward
 553  * task to translate them into Linux-specific versions which are more
 554  * consistent with the style used in NFSv2/v3...
 555  */
 556 #define WRITE32(n)               *p++ = htonl(n)
 557 #define WRITE64(n)               do {                           \
 558         *p++ = htonl((uint32_t)((n) >> 32));                            \
 559         *p++ = htonl((uint32_t)(n));                                    \
 560 } while (0)
 561 #define WRITEMEM(ptr,nbytes)     do {                           \
 562         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 563 } while (0)
 564
 565 #define RESERVE_SPACE(nbytes)   do {                            \
 566         p = xdr_reserve_space(xdr, nbytes);                     \
 567         BUG_ON(!p);                                             \
 568 } while (0)
 569
 570 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 571 {
 572         __be32 *p;
 573
 574         p = xdr_reserve_space(xdr, 4 + len);
 575         BUG_ON(p == NULL);
 576         xdr_encode_opaque(p, str, len);
 577 }
 578
 579 static void encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 580 {
 581         __be32 *p;
 582
 583         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 584         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 585         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 586         WRITE32(hdr->taglen);
 587         WRITEMEM(hdr->tag, hdr->taglen);
 588         WRITE32(NFS4_MINOR_VERSION);
 589         hdr->nops_p = p;
 590         WRITE32(hdr->nops);
 591 }
 592
 593 static void encode_nops(struct compound_hdr *hdr)
 594 {
 595         *hdr->nops_p = htonl(hdr->nops);
 596 }
 597
 598 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 599 {
 600         __be32 *p;
 601
 602         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 603         BUG_ON(p == NULL);
 604         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 605 }
 606
 607 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 608 {
 609         char owner_name[IDMAP_NAMESZ];
 610         char owner_group[IDMAP_NAMESZ];
 611         int owner_namelen = 0;
 612         int owner_grouplen = 0;
 613         __be32 *p;
 614         __be32 *q;
 615         int len;
 616         uint32_t bmval0 = 0;
 617         uint32_t bmval1 = 0;
 618
 619         /*
 620          * We reserve enough space to write the entire attribute buffer at once.
 621          * In the worst-case, this would be
 622          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 623          *          = 36 bytes, plus any contribution from variable-length fields
 624          *            such as owner/group.
 625          */
 626         len = 16;
 627
 628         /* Sigh */
 629         if (iap->ia_valid & ATTR_SIZE)
 630                 len += 8;
 631         if (iap->ia_valid & ATTR_MODE)
 632                 len += 4;
 633         if (iap->ia_valid & ATTR_UID) {
 634                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 635                 if (owner_namelen < 0) {
 636                         dprintk("nfs: couldn't resolve uid %d to string\n",
 637                                         iap->ia_uid);
 638                         /* XXX */
 639                         strcpy(owner_name, "nobody");
 640                         owner_namelen = sizeof("nobody") - 1;
 641                         /* goto out; */
 642                 }
 643                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 644         }
 645         if (iap->ia_valid & ATTR_GID) {
 646                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 647                 if (owner_grouplen < 0) {
 648                         dprintk("nfs: couldn't resolve gid %d to string\n",
 649                                         iap->ia_gid);
 650                         strcpy(owner_group, "nobody");
 651                         owner_grouplen = sizeof("nobody") - 1;
 652                         /* goto out; */
 653                 }
 654                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 655         }
 656         if (iap->ia_valid & ATTR_ATIME_SET)
 657                 len += 16;
 658         else if (iap->ia_valid & ATTR_ATIME)
 659                 len += 4;
 660         if (iap->ia_valid & ATTR_MTIME_SET)
 661                 len += 16;
 662         else if (iap->ia_valid & ATTR_MTIME)
 663                 len += 4;
 664         RESERVE_SPACE(len);
 665
 666         /*
 667          * We write the bitmap length now, but leave the bitmap and the attribute
 668          * buffer length to be backfilled at the end of this routine.
 669          */
 670         WRITE32(2);
 671         q = p;
 672         p += 3;
 673
 674         if (iap->ia_valid & ATTR_SIZE) {
 675                 bmval0 |= FATTR4_WORD0_SIZE;
 676                 WRITE64(iap->ia_size);
 677         }
 678         if (iap->ia_valid & ATTR_MODE) {
 679                 bmval1 |= FATTR4_WORD1_MODE;
 680                 WRITE32(iap->ia_mode & S_IALLUGO);
 681         }
 682         if (iap->ia_valid & ATTR_UID) {
 683                 bmval1 |= FATTR4_WORD1_OWNER;
 684                 WRITE32(owner_namelen);
 685                 WRITEMEM(owner_name, owner_namelen);
 686         }
 687         if (iap->ia_valid & ATTR_GID) {
 688                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 689                 WRITE32(owner_grouplen);
 690                 WRITEMEM(owner_group, owner_grouplen);
 691         }
 692         if (iap->ia_valid & ATTR_ATIME_SET) {
 693                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 694                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 695                 WRITE32(0);
 696                 WRITE32(iap->ia_mtime.tv_sec);
 697                 WRITE32(iap->ia_mtime.tv_nsec);
 698         }
 699         else if (iap->ia_valid & ATTR_ATIME) {
 700                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 701                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 702         }
 703         if (iap->ia_valid & ATTR_MTIME_SET) {
 704                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 705                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 706                 WRITE32(0);
 707                 WRITE32(iap->ia_mtime.tv_sec);
 708                 WRITE32(iap->ia_mtime.tv_nsec);
 709         }
 710         else if (iap->ia_valid & ATTR_MTIME) {
 711                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 712                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 713         }
 714
 715         /*
 716          * Now we backfill the bitmap and the attribute buffer length.
 717          */
 718         if (len != ((char *)p - (char *)q) + 4) {
 719                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 720                                 len, ((char *)p - (char *)q) + 4);
 721                 BUG();
 722         }
 723         len = (char *)p - (char *)q - 12;
 724         *q++ = htonl(bmval0);
 725         *q++ = htonl(bmval1);
 726         *q++ = htonl(len);
 727
 728 /* out: */
 729 }
 730
 731 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 732 {
 733         __be32 *p;
 734
 735         RESERVE_SPACE(8);
 736         WRITE32(OP_ACCESS);
 737         WRITE32(access);
 738         hdr->nops++;
 739 }
 740
 741 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 742 {
 743         __be32 *p;
 744
 745         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 746         WRITE32(OP_CLOSE);
 747         WRITE32(arg->seqid->sequence->counter);
 748         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 749         hdr->nops++;
 750 }
 751
 752 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 753 {
 754         __be32 *p;
 755
 756         RESERVE_SPACE(16);
 757         WRITE32(OP_COMMIT);
 758         WRITE64(args->offset);
 759         WRITE32(args->count);
 760         hdr->nops++;
 761 }
 762
 763 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 764 {
 765         __be32 *p;
 766
 767         RESERVE_SPACE(8);
 768         WRITE32(OP_CREATE);
 769         WRITE32(create->ftype);
 770
 771         switch (create->ftype) {
 772         case NF4LNK:
 773                 RESERVE_SPACE(4);
 774                 WRITE32(create->u.symlink.len);
 775                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 776                 break;
 777
 778         case NF4BLK: case NF4CHR:
 779                 RESERVE_SPACE(8);
 780                 WRITE32(create->u.device.specdata1);
 781                 WRITE32(create->u.device.specdata2);
 782                 break;
 783
 784         default:
 785                 break;
 786         }
 787
 788         RESERVE_SPACE(4 + create->name->len);
 789         WRITE32(create->name->len);
 790         WRITEMEM(create->name->name, create->name->len);
 791         hdr->nops++;
 792
 793         encode_attrs(xdr, create->attrs, create->server);
 794 }
 795
 796 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 797 {
 798         __be32 *p;
 799
 800         RESERVE_SPACE(12);
 801         WRITE32(OP_GETATTR);
 802         WRITE32(1);
 803         WRITE32(bitmap);
 804         hdr->nops++;
 805 }
 806
 807 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 808 {
 809         __be32 *p;
 810
 811         RESERVE_SPACE(16);
 812         WRITE32(OP_GETATTR);
 813         WRITE32(2);
 814         WRITE32(bm0);
 815         WRITE32(bm1);
 816         hdr->nops++;
 817 }
 818
 819 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 820 {
 821         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 822                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 823 }
 824
 825 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 826 {
 827         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 828                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 829 }
 830
 831 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 832 {
 833         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 834                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 835 }
 836
 837 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 838 {
 839         __be32 *p;
 840
 841         RESERVE_SPACE(4);
 842         WRITE32(OP_GETFH);
 843         hdr->nops++;
 844 }
 845
 846 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 847 {
 848         __be32 *p;
 849
 850         RESERVE_SPACE(8 + name->len);
 851         WRITE32(OP_LINK);
 852         WRITE32(name->len);
 853         WRITEMEM(name->name, name->len);
 854         hdr->nops++;
 855 }
 856
 857 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 858 {
 859         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 860                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 861         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 862 }
 863
 864 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 865 {
 866         if (fl->fl_end == OFFSET_MAX)
 867                 return ~(uint64_t)0;
 868         return fl->fl_end - fl->fl_start + 1;
 869 }
 870
 871 /*
 872  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 873  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 874  */
 875 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 876 {
 877         __be32 *p;
 878
 879         RESERVE_SPACE(32);
 880         WRITE32(OP_LOCK);
 881         WRITE32(nfs4_lock_type(args->fl, args->block));
 882         WRITE32(args->reclaim);
 883         WRITE64(args->fl->fl_start);
 884         WRITE64(nfs4_lock_length(args->fl));
 885         WRITE32(args->new_lock_owner);
 886         if (args->new_lock_owner){
 887                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 888                 WRITE32(args->open_seqid->sequence->counter);
 889                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 890                 WRITE32(args->lock_seqid->sequence->counter);
 891                 WRITE64(args->lock_owner.clientid);
 892                 WRITE32(16);
 893                 WRITEMEM("lock id:", 8);
 894                 WRITE64(args->lock_owner.id);
 895         }
 896         else {
 897                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 898                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 899                 WRITE32(args->lock_seqid->sequence->counter);
 900         }
 901         hdr->nops++;
 902 }
 903
 904 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
 905 {
 906         __be32 *p;
 907
 908         RESERVE_SPACE(52);
 909         WRITE32(OP_LOCKT);
 910         WRITE32(nfs4_lock_type(args->fl, 0));
 911         WRITE64(args->fl->fl_start);
 912         WRITE64(nfs4_lock_length(args->fl));
 913         WRITE64(args->lock_owner.clientid);
 914         WRITE32(16);
 915         WRITEMEM("lock id:", 8);
 916         WRITE64(args->lock_owner.id);
 917         hdr->nops++;
 918 }
 919
 920 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
 921 {
 922         __be32 *p;
 923
 924         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 925         WRITE32(OP_LOCKU);
 926         WRITE32(nfs4_lock_type(args->fl, 0));
 927         WRITE32(args->seqid->sequence->counter);
 928         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 929         WRITE64(args->fl->fl_start);
 930         WRITE64(nfs4_lock_length(args->fl));
 931         hdr->nops++;
 932 }
 933
 934 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 935 {
 936         int len = name->len;
 937         __be32 *p;
 938
 939         RESERVE_SPACE(8 + len);
 940         WRITE32(OP_LOOKUP);
 941         WRITE32(len);
 942         WRITEMEM(name->name, len);
 943         hdr->nops++;
 944 }
 945
 946 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
 947 {
 948         __be32 *p;
 949
 950         RESERVE_SPACE(8);
 951         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
 952         case FMODE_READ:
 953                 WRITE32(NFS4_SHARE_ACCESS_READ);
 954                 break;
 955         case FMODE_WRITE:
 956                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
 957                 break;
 958         case FMODE_READ|FMODE_WRITE:
 959                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
 960                 break;
 961         default:
 962                 WRITE32(0);
 963         }
 964         WRITE32(0);             /* for linux, share_deny = 0 always */
 965 }
 966
 967 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 968 {
 969         __be32 *p;
 970  /*
 971  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 972  * owner 4 = 32
 973  */
 974         RESERVE_SPACE(8);
 975         WRITE32(OP_OPEN);
 976         WRITE32(arg->seqid->sequence->counter);
 977         encode_share_access(xdr, arg->fmode);
 978         RESERVE_SPACE(28);
 979         WRITE64(arg->clientid);
 980         WRITE32(16);
 981         WRITEMEM("open id:", 8);
 982         WRITE64(arg->id);
 983 }
 984
 985 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 986 {
 987         __be32 *p;
 988
 989         RESERVE_SPACE(4);
 990         switch(arg->open_flags & O_EXCL) {
 991         case 0:
 992                 WRITE32(NFS4_CREATE_UNCHECKED);
 993                 encode_attrs(xdr, arg->u.attrs, arg->server);
 994                 break;
 995         default:
 996                 WRITE32(NFS4_CREATE_EXCLUSIVE);
 997                 encode_nfs4_verifier(xdr, &arg->u.verifier);
 998         }
 999 }
1000
1001 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1002 {
1003         __be32 *p;
1004
1005         RESERVE_SPACE(4);
1006         switch (arg->open_flags & O_CREAT) {
1007         case 0:
1008                 WRITE32(NFS4_OPEN_NOCREATE);
1009                 break;
1010         default:
1011                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1012                 WRITE32(NFS4_OPEN_CREATE);
1013                 encode_createmode(xdr, arg);
1014         }
1015 }
1016
1017 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1018 {
1019         __be32 *p;
1020
1021         RESERVE_SPACE(4);
1022         switch (delegation_type) {
1023         case 0:
1024                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1025                 break;
1026         case FMODE_READ:
1027                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1028                 break;
1029         case FMODE_WRITE|FMODE_READ:
1030                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1031                 break;
1032         default:
1033                 BUG();
1034         }
1035 }
1036
1037 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1038 {
1039         __be32 *p;
1040
1041         RESERVE_SPACE(4);
1042         WRITE32(NFS4_OPEN_CLAIM_NULL);
1043         encode_string(xdr, name->len, name->name);
1044 }
1045
1046 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1047 {
1048         __be32 *p;
1049
1050         RESERVE_SPACE(4);
1051         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1052         encode_delegation_type(xdr, type);
1053 }
1054
1055 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1056 {
1057         __be32 *p;
1058
1059         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1060         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1061         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1062         encode_string(xdr, name->len, name->name);
1063 }
1064
1065 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1066 {
1067         encode_openhdr(xdr, arg);
1068         encode_opentype(xdr, arg);
1069         switch (arg->claim) {
1070         case NFS4_OPEN_CLAIM_NULL:
1071                 encode_claim_null(xdr, arg->name);
1072                 break;
1073         case NFS4_OPEN_CLAIM_PREVIOUS:
1074                 encode_claim_previous(xdr, arg->u.delegation_type);
1075                 break;
1076         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1077                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1078                 break;
1079         default:
1080                 BUG();
1081         }
1082         hdr->nops++;
1083 }
1084
1085 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1086 {
1087         __be32 *p;
1088
1089         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1090         WRITE32(OP_OPEN_CONFIRM);
1091         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1092         WRITE32(arg->seqid->sequence->counter);
1093         hdr->nops++;
1094 }
1095
1096 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1097 {
1098         __be32 *p;
1099
1100         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1101         WRITE32(OP_OPEN_DOWNGRADE);
1102         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1103         WRITE32(arg->seqid->sequence->counter);
1104         encode_share_access(xdr, arg->fmode);
1105         hdr->nops++;
1106 }
1107
1108 static void
1109 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1110 {
1111         int len = fh->size;
1112         __be32 *p;
1113
1114         RESERVE_SPACE(8 + len);
1115         WRITE32(OP_PUTFH);
1116         WRITE32(len);
1117         WRITEMEM(fh->data, len);
1118         hdr->nops++;
1119 }
1120
1121 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1122 {
1123         __be32 *p;
1124
1125         RESERVE_SPACE(4);
1126         WRITE32(OP_PUTROOTFH);
1127         hdr->nops++;
1128 }
1129
1130 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1131 {
1132         nfs4_stateid stateid;
1133         __be32 *p;
1134
1135         RESERVE_SPACE(NFS4_STATEID_SIZE);
1136         if (ctx->state != NULL) {
1137                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1138                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1139         } else
1140                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1141 }
1142
1143 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1144 {
1145         __be32 *p;
1146
1147         RESERVE_SPACE(4);
1148         WRITE32(OP_READ);
1149
1150         encode_stateid(xdr, args->context);
1151
1152         RESERVE_SPACE(12);
1153         WRITE64(args->offset);
1154         WRITE32(args->count);
1155         hdr->nops++;
1156 }
1157
1158 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1159 {
1160         uint32_t attrs[2] = {
1161                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1162                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1163         };
1164         __be32 *p;
1165
1166         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1167         WRITE32(OP_READDIR);
1168         WRITE64(readdir->cookie);
1169         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1170         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1171         WRITE32(readdir->count);
1172         WRITE32(2);
1173         /* Switch to mounted_on_fileid if the server supports it */
1174         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1175                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1176         else
1177                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1178         WRITE32(attrs[0] & readdir->bitmask[0]);
1179         WRITE32(attrs[1] & readdir->bitmask[1]);
1180         hdr->nops++;
1181         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1182                         __func__,
1183                         (unsigned long long)readdir->cookie,
1184                         ((u32 *)readdir->verifier.data)[0],
1185                         ((u32 *)readdir->verifier.data)[1],
1186                         attrs[0] & readdir->bitmask[0],
1187                         attrs[1] & readdir->bitmask[1]);
1188 }
1189
1190 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1191 {
1192         __be32 *p;
1193
1194         RESERVE_SPACE(4);
1195         WRITE32(OP_READLINK);
1196         hdr->nops++;
1197 }
1198
1199 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1200 {
1201         __be32 *p;
1202
1203         RESERVE_SPACE(8 + name->len);
1204         WRITE32(OP_REMOVE);
1205         WRITE32(name->len);
1206         WRITEMEM(name->name, name->len);
1207         hdr->nops++;
1208 }
1209
1210 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1211 {
1212         __be32 *p;
1213
1214         RESERVE_SPACE(8 + oldname->len);
1215         WRITE32(OP_RENAME);
1216         WRITE32(oldname->len);
1217         WRITEMEM(oldname->name, oldname->len);
1218
1219         RESERVE_SPACE(4 + newname->len);
1220         WRITE32(newname->len);
1221         WRITEMEM(newname->name, newname->len);
1222         hdr->nops++;
1223 }
1224
1225 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1226 {
1227         __be32 *p;
1228
1229         RESERVE_SPACE(12);
1230         WRITE32(OP_RENEW);
1231         WRITE64(client_stateid->cl_clientid);
1232         hdr->nops++;
1233 }
1234
1235 static void
1236 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1237 {
1238         __be32 *p;
1239
1240         RESERVE_SPACE(4);
1241         WRITE32(OP_RESTOREFH);
1242         hdr->nops++;
1243 }
1244
1245 static int
1246 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1247 {
1248         __be32 *p;
1249
1250         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1251         WRITE32(OP_SETATTR);
1252         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1253         RESERVE_SPACE(2*4);
1254         WRITE32(1);
1255         WRITE32(FATTR4_WORD0_ACL);
1256         if (arg->acl_len % 4)
1257                 return -EINVAL;
1258         RESERVE_SPACE(4);
1259         WRITE32(arg->acl_len);
1260         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1261         hdr->nops++;
1262         return 0;
1263 }
1264
1265 static void
1266 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4);
1271         WRITE32(OP_SAVEFH);
1272         hdr->nops++;
1273 }
1274
1275 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1276 {
1277         __be32 *p;
1278
1279         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1280         WRITE32(OP_SETATTR);
1281         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1282         hdr->nops++;
1283         encode_attrs(xdr, arg->iap, server);
1284 }
1285
1286 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1287 {
1288         __be32 *p;
1289
1290         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1291         WRITE32(OP_SETCLIENTID);
1292         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1293
1294         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1295         RESERVE_SPACE(4);
1296         WRITE32(setclientid->sc_prog);
1297         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1298         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1299         RESERVE_SPACE(4);
1300         WRITE32(setclientid->sc_cb_ident);
1301         hdr->nops++;
1302 }
1303
1304 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1305 {
1306         __be32 *p;
1307
1308         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1309         WRITE32(OP_SETCLIENTID_CONFIRM);
1310         WRITE64(client_state->cl_clientid);
1311         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1312         hdr->nops++;
1313 }
1314
1315 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1316 {
1317         __be32 *p;
1318
1319         RESERVE_SPACE(4);
1320         WRITE32(OP_WRITE);
1321
1322         encode_stateid(xdr, args->context);
1323
1324         RESERVE_SPACE(16);
1325         WRITE64(args->offset);
1326         WRITE32(args->stable);
1327         WRITE32(args->count);
1328
1329         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1330         hdr->nops++;
1331 }
1332
1333 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1334 {
1335         __be32 *p;
1336
1337         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1338
1339         WRITE32(OP_DELEGRETURN);
1340         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1341         hdr->nops++;
1342 }
1343 /*
1344  * END OF "GENERIC" ENCODE ROUTINES.
1345  */
1346
1347 /*
1348  * Encode an ACCESS request
1349  */
1350 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1351 {
1352         struct xdr_stream xdr;
1353         struct compound_hdr hdr = {
1354                 .nops = 0,
1355         };
1356
1357         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1358         encode_compound_hdr(&xdr, &hdr);
1359         encode_putfh(&xdr, args->fh, &hdr);
1360         encode_access(&xdr, args->access, &hdr);
1361         encode_getfattr(&xdr, args->bitmask, &hdr);
1362         encode_nops(&hdr);
1363         return 0;
1364 }
1365
1366 /*
1367  * Encode LOOKUP request
1368  */
1369 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1370 {
1371         struct xdr_stream xdr;
1372         struct compound_hdr hdr = {
1373                 .nops = 0,
1374         };
1375
1376         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1377         encode_compound_hdr(&xdr, &hdr);
1378         encode_putfh(&xdr, args->dir_fh, &hdr);
1379         encode_lookup(&xdr, args->name, &hdr);
1380         encode_getfh(&xdr, &hdr);
1381         encode_getfattr(&xdr, args->bitmask, &hdr);
1382         encode_nops(&hdr);
1383         return 0;
1384 }
1385
1386 /*
1387  * Encode LOOKUP_ROOT request
1388  */
1389 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1390 {
1391         struct xdr_stream xdr;
1392         struct compound_hdr hdr = {
1393                 .nops = 0,
1394         };
1395
1396         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1397         encode_compound_hdr(&xdr, &hdr);
1398         encode_putrootfh(&xdr, &hdr);
1399         encode_getfh(&xdr, &hdr);
1400         encode_getfattr(&xdr, args->bitmask, &hdr);
1401         encode_nops(&hdr);
1402         return 0;
1403 }
1404
1405 /*
1406  * Encode REMOVE request
1407  */
1408 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1409 {
1410         struct xdr_stream xdr;
1411         struct compound_hdr hdr = {
1412                 .nops = 0,
1413         };
1414
1415         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1416         encode_compound_hdr(&xdr, &hdr);
1417         encode_putfh(&xdr, args->fh, &hdr);
1418         encode_remove(&xdr, &args->name, &hdr);
1419         encode_getfattr(&xdr, args->bitmask, &hdr);
1420         encode_nops(&hdr);
1421         return 0;
1422 }
1423
1424 /*
1425  * Encode RENAME request
1426  */
1427 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1428 {
1429         struct xdr_stream xdr;
1430         struct compound_hdr hdr = {
1431                 .nops = 0,
1432         };
1433
1434         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435         encode_compound_hdr(&xdr, &hdr);
1436         encode_putfh(&xdr, args->old_dir, &hdr);
1437         encode_savefh(&xdr, &hdr);
1438         encode_putfh(&xdr, args->new_dir, &hdr);
1439         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1440         encode_getfattr(&xdr, args->bitmask, &hdr);
1441         encode_restorefh(&xdr, &hdr);
1442         encode_getfattr(&xdr, args->bitmask, &hdr);
1443         encode_nops(&hdr);
1444         return 0;
1445 }
1446
1447 /*
1448  * Encode LINK request
1449  */
1450 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1451 {
1452         struct xdr_stream xdr;
1453         struct compound_hdr hdr = {
1454                 .nops = 0,
1455         };
1456
1457         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1458         encode_compound_hdr(&xdr, &hdr);
1459         encode_putfh(&xdr, args->fh, &hdr);
1460         encode_savefh(&xdr, &hdr);
1461         encode_putfh(&xdr, args->dir_fh, &hdr);
1462         encode_link(&xdr, args->name, &hdr);
1463         encode_getfattr(&xdr, args->bitmask, &hdr);
1464         encode_restorefh(&xdr, &hdr);
1465         encode_getfattr(&xdr, args->bitmask, &hdr);
1466         encode_nops(&hdr);
1467         return 0;
1468 }
1469
1470 /*
1471  * Encode CREATE request
1472  */
1473 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1474 {
1475         struct xdr_stream xdr;
1476         struct compound_hdr hdr = {
1477                 .nops = 0,
1478         };
1479
1480         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1481         encode_compound_hdr(&xdr, &hdr);
1482         encode_putfh(&xdr, args->dir_fh, &hdr);
1483         encode_savefh(&xdr, &hdr);
1484         encode_create(&xdr, args, &hdr);
1485         encode_getfh(&xdr, &hdr);
1486         encode_getfattr(&xdr, args->bitmask, &hdr);
1487         encode_restorefh(&xdr, &hdr);
1488         encode_getfattr(&xdr, args->bitmask, &hdr);
1489         encode_nops(&hdr);
1490         return 0;
1491 }
1492
1493 /*
1494  * Encode SYMLINK request
1495  */
1496 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1497 {
1498         return nfs4_xdr_enc_create(req, p, args);
1499 }
1500
1501 /*
1502  * Encode GETATTR request
1503  */
1504 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1505 {
1506         struct xdr_stream xdr;
1507         struct compound_hdr hdr = {
1508                 .nops = 0,
1509         };
1510
1511         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1512         encode_compound_hdr(&xdr, &hdr);
1513         encode_putfh(&xdr, args->fh, &hdr);
1514         encode_getfattr(&xdr, args->bitmask, &hdr);
1515         encode_nops(&hdr);
1516         return 0;
1517 }
1518
1519 /*
1520  * Encode a CLOSE request
1521  */
1522 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1523 {
1524         struct xdr_stream xdr;
1525         struct compound_hdr hdr = {
1526                 .nops   = 0,
1527         };
1528
1529         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1530         encode_compound_hdr(&xdr, &hdr);
1531         encode_putfh(&xdr, args->fh, &hdr);
1532         encode_close(&xdr, args, &hdr);
1533         encode_getfattr(&xdr, args->bitmask, &hdr);
1534         encode_nops(&hdr);
1535         return 0;
1536 }
1537
1538 /*
1539  * Encode an OPEN request
1540  */
1541 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1542 {
1543         struct xdr_stream xdr;
1544         struct compound_hdr hdr = {
1545                 .nops = 0,
1546         };
1547
1548         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1549         encode_compound_hdr(&xdr, &hdr);
1550         encode_putfh(&xdr, args->fh, &hdr);
1551         encode_savefh(&xdr, &hdr);
1552         encode_open(&xdr, args, &hdr);
1553         encode_getfh(&xdr, &hdr);
1554         encode_getfattr(&xdr, args->bitmask, &hdr);
1555         encode_restorefh(&xdr, &hdr);
1556         encode_getfattr(&xdr, args->bitmask, &hdr);
1557         encode_nops(&hdr);
1558         return 0;
1559 }
1560
1561 /*
1562  * Encode an OPEN_CONFIRM request
1563  */
1564 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1565 {
1566         struct xdr_stream xdr;
1567         struct compound_hdr hdr = {
1568                 .nops   = 0,
1569         };
1570
1571         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1572         encode_compound_hdr(&xdr, &hdr);
1573         encode_putfh(&xdr, args->fh, &hdr);
1574         encode_open_confirm(&xdr, args, &hdr);
1575         encode_nops(&hdr);
1576         return 0;
1577 }
1578
1579 /*
1580  * Encode an OPEN request with no attributes.
1581  */
1582 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1583 {
1584         struct xdr_stream xdr;
1585         struct compound_hdr hdr = {
1586                 .nops   = 0,
1587         };
1588
1589         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1590         encode_compound_hdr(&xdr, &hdr);
1591         encode_putfh(&xdr, args->fh, &hdr);
1592         encode_open(&xdr, args, &hdr);
1593         encode_getfattr(&xdr, args->bitmask, &hdr);
1594         encode_nops(&hdr);
1595         return 0;
1596 }
1597
1598 /*
1599  * Encode an OPEN_DOWNGRADE request
1600  */
1601 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1602 {
1603         struct xdr_stream xdr;
1604         struct compound_hdr hdr = {
1605                 .nops   = 0,
1606         };
1607
1608         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1609         encode_compound_hdr(&xdr, &hdr);
1610         encode_putfh(&xdr, args->fh, &hdr);
1611         encode_open_downgrade(&xdr, args, &hdr);
1612         encode_getfattr(&xdr, args->bitmask, &hdr);
1613         encode_nops(&hdr);
1614         return 0;
1615 }
1616
1617 /*
1618  * Encode a LOCK request
1619  */
1620 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1621 {
1622         struct xdr_stream xdr;
1623         struct compound_hdr hdr = {
1624                 .nops   = 0,
1625         };
1626
1627         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1628         encode_compound_hdr(&xdr, &hdr);
1629         encode_putfh(&xdr, args->fh, &hdr);
1630         encode_lock(&xdr, args, &hdr);
1631         encode_nops(&hdr);
1632         return 0;
1633 }
1634
1635 /*
1636  * Encode a LOCKT request
1637  */
1638 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1639 {
1640         struct xdr_stream xdr;
1641         struct compound_hdr hdr = {
1642                 .nops   = 0,
1643         };
1644
1645         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1646         encode_compound_hdr(&xdr, &hdr);
1647         encode_putfh(&xdr, args->fh, &hdr);
1648         encode_lockt(&xdr, args, &hdr);
1649         encode_nops(&hdr);
1650         return 0;
1651 }
1652
1653 /*
1654  * Encode a LOCKU request
1655  */
1656 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1657 {
1658         struct xdr_stream xdr;
1659         struct compound_hdr hdr = {
1660                 .nops   = 0,
1661         };
1662
1663         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664         encode_compound_hdr(&xdr, &hdr);
1665         encode_putfh(&xdr, args->fh, &hdr);
1666         encode_locku(&xdr, args, &hdr);
1667         encode_nops(&hdr);
1668         return 0;
1669 }
1670
1671 /*
1672  * Encode a READLINK request
1673  */
1674 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1675 {
1676         struct xdr_stream xdr;
1677         struct compound_hdr hdr = {
1678                 .nops = 0,
1679         };
1680         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1681         unsigned int replen;
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, &hdr);
1685         encode_putfh(&xdr, args->fh, &hdr);
1686         encode_readlink(&xdr, args, req, &hdr);
1687
1688         /* set up reply kvec
1689          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1690          *      + OP_READLINK + status + string length = 8
1691          */
1692         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1693         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1694                         args->pgbase, args->pglen);
1695         encode_nops(&hdr);
1696         return 0;
1697 }
1698
1699 /*
1700  * Encode a READDIR request
1701  */
1702 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1703 {
1704         struct xdr_stream xdr;
1705         struct compound_hdr hdr = {
1706                 .nops = 0,
1707         };
1708         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1709         int replen;
1710
1711         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1712         encode_compound_hdr(&xdr, &hdr);
1713         encode_putfh(&xdr, args->fh, &hdr);
1714         encode_readdir(&xdr, args, req, &hdr);
1715
1716         /* set up reply kvec
1717          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1718          *      + OP_READDIR + status + verifer(2)  = 9
1719          */
1720         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1721         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1722                          args->pgbase, args->count);
1723         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1724                         __func__, replen, args->pages,
1725                         args->pgbase, args->count);
1726         encode_nops(&hdr);
1727         return 0;
1728 }
1729
1730 /*
1731  * Encode a READ request
1732  */
1733 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1734 {
1735         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1736         struct xdr_stream xdr;
1737         struct compound_hdr hdr = {
1738                 .nops = 0,
1739         };
1740         int replen;
1741
1742         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1743         encode_compound_hdr(&xdr, &hdr);
1744         encode_putfh(&xdr, args->fh, &hdr);
1745         encode_read(&xdr, args, &hdr);
1746
1747         /* set up reply kvec
1748          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1749          *       + OP_READ + status + eof + datalen = 9
1750          */
1751         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1752         xdr_inline_pages(&req->rq_rcv_buf, replen,
1753                          args->pages, args->pgbase, args->count);
1754         req->rq_rcv_buf.flags |= XDRBUF_READ;
1755         encode_nops(&hdr);
1756         return 0;
1757 }
1758
1759 /*
1760  * Encode an SETATTR request
1761  */
1762 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1763 {
1764         struct xdr_stream xdr;
1765         struct compound_hdr hdr = {
1766                 .nops   = 0,
1767         };
1768
1769         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770         encode_compound_hdr(&xdr, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_setattr(&xdr, args, args->server, &hdr);
1773         encode_getfattr(&xdr, args->bitmask, &hdr);
1774         encode_nops(&hdr);
1775         return 0;
1776 }
1777
1778 /*
1779  * Encode a GETACL request
1780  */
1781 static int
1782 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1783                 struct nfs_getaclargs *args)
1784 {
1785         struct xdr_stream xdr;
1786         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1787         struct compound_hdr hdr = {
1788                 .nops   = 0,
1789         };
1790         int replen;
1791
1792         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793         encode_compound_hdr(&xdr, &hdr);
1794         encode_putfh(&xdr, args->fh, &hdr);
1795         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1796
1797         /* set up reply buffer: */
1798         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1799         xdr_inline_pages(&req->rq_rcv_buf, replen,
1800                 args->acl_pages, args->acl_pgbase, args->acl_len);
1801         encode_nops(&hdr);
1802         return 0;
1803 }
1804
1805 /*
1806  * Encode a WRITE request
1807  */
1808 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1809 {
1810         struct xdr_stream xdr;
1811         struct compound_hdr hdr = {
1812                 .nops = 0,
1813         };
1814
1815         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1816         encode_compound_hdr(&xdr, &hdr);
1817         encode_putfh(&xdr, args->fh, &hdr);
1818         encode_write(&xdr, args, &hdr);
1819         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1820         encode_getfattr(&xdr, args->bitmask, &hdr);
1821         encode_nops(&hdr);
1822         return 0;
1823 }
1824
1825 /*
1826  *  a COMMIT request
1827  */
1828 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1829 {
1830         struct xdr_stream xdr;
1831         struct compound_hdr hdr = {
1832                 .nops = 0,
1833         };
1834
1835         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1836         encode_compound_hdr(&xdr, &hdr);
1837         encode_putfh(&xdr, args->fh, &hdr);
1838         encode_commit(&xdr, args, &hdr);
1839         encode_getfattr(&xdr, args->bitmask, &hdr);
1840         encode_nops(&hdr);
1841         return 0;
1842 }
1843
1844 /*
1845  * FSINFO request
1846  */
1847 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1848 {
1849         struct xdr_stream xdr;
1850         struct compound_hdr hdr = {
1851                 .nops   = 0,
1852         };
1853
1854         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1855         encode_compound_hdr(&xdr, &hdr);
1856         encode_putfh(&xdr, args->fh, &hdr);
1857         encode_fsinfo(&xdr, args->bitmask, &hdr);
1858         encode_nops(&hdr);
1859         return 0;
1860 }
1861
1862 /*
1863  * a PATHCONF request
1864  */
1865 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1866 {
1867         struct xdr_stream xdr;
1868         struct compound_hdr hdr = {
1869                 .nops = 0,
1870         };
1871
1872         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1873         encode_compound_hdr(&xdr, &hdr);
1874         encode_putfh(&xdr, args->fh, &hdr);
1875         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
1876                            &hdr);
1877         encode_nops(&hdr);
1878         return 0;
1879 }
1880
1881 /*
1882  * a STATFS request
1883  */
1884 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
1885 {
1886         struct xdr_stream xdr;
1887         struct compound_hdr hdr = {
1888                 .nops = 0,
1889         };
1890
1891         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1892         encode_compound_hdr(&xdr, &hdr);
1893         encode_putfh(&xdr, args->fh, &hdr);
1894         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
1895                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
1896         encode_nops(&hdr);
1897         return 0;
1898 }
1899
1900 /*
1901  * GETATTR_BITMAP request
1902  */
1903 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
1904                                     struct nfs4_server_caps_arg *args)
1905 {
1906         struct xdr_stream xdr;
1907         struct compound_hdr hdr = {
1908                 .nops = 0,
1909         };
1910
1911         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1912         encode_compound_hdr(&xdr, &hdr);
1913         encode_putfh(&xdr, args->fhandle, &hdr);
1914         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
1915                            FATTR4_WORD0_LINK_SUPPORT|
1916                            FATTR4_WORD0_SYMLINK_SUPPORT|
1917                            FATTR4_WORD0_ACLSUPPORT, &hdr);
1918         encode_nops(&hdr);
1919         return 0;
1920 }
1921
1922 /*
1923  * a RENEW request
1924  */
1925 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1926 {
1927         struct xdr_stream xdr;
1928         struct compound_hdr hdr = {
1929                 .nops   = 0,
1930         };
1931
1932         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1933         encode_compound_hdr(&xdr, &hdr);
1934         encode_renew(&xdr, clp, &hdr);
1935         encode_nops(&hdr);
1936         return 0;
1937 }
1938
1939 /*
1940  * a SETCLIENTID request
1941  */
1942 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
1943 {
1944         struct xdr_stream xdr;
1945         struct compound_hdr hdr = {
1946                 .nops   = 0,
1947         };
1948
1949         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1950         encode_compound_hdr(&xdr, &hdr);
1951         encode_setclientid(&xdr, sc, &hdr);
1952         encode_nops(&hdr);
1953         return 0;
1954 }
1955
1956 /*
1957  * a SETCLIENTID_CONFIRM request
1958  */
1959 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
1960 {
1961         struct xdr_stream xdr;
1962         struct compound_hdr hdr = {
1963                 .nops   = 0,
1964         };
1965         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
1966
1967         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1968         encode_compound_hdr(&xdr, &hdr);
1969         encode_setclientid_confirm(&xdr, clp, &hdr);
1970         encode_putrootfh(&xdr, &hdr);
1971         encode_fsinfo(&xdr, lease_bitmap, &hdr);
1972         encode_nops(&hdr);
1973         return 0;
1974 }
1975
1976 /*
1977  * DELEGRETURN request
1978  */
1979 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
1980 {
1981         struct xdr_stream xdr;
1982         struct compound_hdr hdr = {
1983                 .nops = 0,
1984         };
1985
1986         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1987         encode_compound_hdr(&xdr, &hdr);
1988         encode_putfh(&xdr, args->fhandle, &hdr);
1989         encode_delegreturn(&xdr, args->stateid, &hdr);
1990         encode_getfattr(&xdr, args->bitmask, &hdr);
1991         encode_nops(&hdr);
1992         return 0;
1993 }
1994
1995 /*
1996  * Encode FS_LOCATIONS request
1997  */
1998 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
1999 {
2000         struct xdr_stream xdr;
2001         struct compound_hdr hdr = {
2002                 .nops = 0,
2003         };
2004         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2005         int replen;
2006
2007         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2008         encode_compound_hdr(&xdr, &hdr);
2009         encode_putfh(&xdr, args->dir_fh, &hdr);
2010         encode_lookup(&xdr, args->name, &hdr);
2011         encode_fs_locations(&xdr, args->bitmask, &hdr);
2012
2013         /* set up reply
2014          *   toplevel_status + OP_PUTFH + status
2015          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2016          */
2017         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2018         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2019                         0, PAGE_SIZE);
2020         encode_nops(&hdr);
2021         return 0;
2022 }
2023
2024 /*
2025  * START OF "GENERIC" DECODE ROUTINES.
2026  *   These may look a little ugly since they are imported from a "generic"
2027  * set of XDR encode/decode routines which are intended to be shared by
2028  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2029  *
2030  * If the pain of reading these is too great, it should be a straightforward
2031  * task to translate them into Linux-specific versions which are more
2032  * consistent with the style used in NFSv2/v3...
2033  */
2034 #define READ32(x)         (x) = ntohl(*p++)
2035 #define READ64(x)         do {                  \
2036         (x) = (u64)ntohl(*p++) << 32;           \
2037         (x) |= ntohl(*p++);                     \
2038 } while (0)
2039 #define READTIME(x)       do {                  \
2040         p++;                                    \
2041         (x.tv_sec) = ntohl(*p++);               \
2042         (x.tv_nsec) = ntohl(*p++);              \
2043 } while (0)
2044 #define COPYMEM(x,nbytes) do {                  \
2045         memcpy((x), p, nbytes);                 \
2046         p += XDR_QUADLEN(nbytes);               \
2047 } while (0)
2048
2049 #define READ_BUF(nbytes)  do { \
2050         p = xdr_inline_decode(xdr, nbytes); \
2051         if (unlikely(!p)) { \
2052                 dprintk("nfs: %s: prematurely hit end of receive" \
2053                                 " buffer\n", __func__); \
2054                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2055                                 __func__, xdr->p, nbytes, xdr->end); \
2056                 return -EIO; \
2057         } \
2058 } while (0)
2059
2060 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2061 {
2062         __be32 *p;
2063
2064         READ_BUF(4);
2065         READ32(*len);
2066         READ_BUF(*len);
2067         *string = (char *)p;
2068         return 0;
2069 }
2070
2071 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2072 {
2073         __be32 *p;
2074
2075         READ_BUF(8);
2076         READ32(hdr->status);
2077         READ32(hdr->taglen);
2078
2079         READ_BUF(hdr->taglen + 4);
2080         hdr->tag = (char *)p;
2081         p += XDR_QUADLEN(hdr->taglen);
2082         READ32(hdr->nops);
2083         if (unlikely(hdr->nops < 1))
2084                 return nfs4_stat_to_errno(hdr->status);
2085         return 0;
2086 }
2087
2088 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2089 {
2090         __be32 *p;
2091         uint32_t opnum;
2092         int32_t nfserr;
2093
2094         READ_BUF(8);
2095         READ32(opnum);
2096         if (opnum != expected) {
2097                 dprintk("nfs: Server returned operation"
2098                         " %d but we issued a request for %d\n",
2099                                 opnum, expected);
2100                 return -EIO;
2101         }
2102         READ32(nfserr);
2103         if (nfserr != NFS_OK)
2104                 return nfs4_stat_to_errno(nfserr);
2105         return 0;
2106 }
2107
2108 /* Dummy routine */
2109 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2110 {
2111         __be32 *p;
2112         unsigned int strlen;
2113         char *str;
2114
2115         READ_BUF(12);
2116         return decode_opaque_inline(xdr, &strlen, &str);
2117 }
2118
2119 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2120 {
2121         uint32_t bmlen;
2122         __be32 *p;
2123
2124         READ_BUF(4);
2125         READ32(bmlen);
2126
2127         bitmap[0] = bitmap[1] = 0;
2128         READ_BUF((bmlen << 2));
2129         if (bmlen > 0) {
2130                 READ32(bitmap[0]);
2131                 if (bmlen > 1)
2132                         READ32(bitmap[1]);
2133         }
2134         return 0;
2135 }
2136
2137 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2138 {
2139         __be32 *p;
2140
2141         READ_BUF(4);
2142         READ32(*attrlen);
2143         *savep = xdr->p;
2144         return 0;
2145 }
2146
2147 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2148 {
2149         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2150                 decode_attr_bitmap(xdr, bitmask);
2151                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2152         } else
2153                 bitmask[0] = bitmask[1] = 0;
2154         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2155         return 0;
2156 }
2157
2158 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2159 {
2160         __be32 *p;
2161         int ret = 0;
2162
2163         *type = 0;
2164         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2165                 return -EIO;
2166         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2167                 READ_BUF(4);
2168                 READ32(*type);
2169                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2170                         dprintk("%s: bad type %d\n", __func__, *type);
2171                         return -EIO;
2172                 }
2173                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2174                 ret = NFS_ATTR_FATTR_TYPE;
2175         }
2176         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2177         return ret;
2178 }
2179
2180 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2181 {
2182         __be32 *p;
2183         int ret = 0;
2184
2185         *change = 0;
2186         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2187                 return -EIO;
2188         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2189                 READ_BUF(8);
2190                 READ64(*change);
2191                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2192                 ret = NFS_ATTR_FATTR_CHANGE;
2193         }
2194         dprintk("%s: change attribute=%Lu\n", __func__,
2195                         (unsigned long long)*change);
2196         return ret;
2197 }
2198
2199 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2200 {
2201         __be32 *p;
2202         int ret = 0;
2203
2204         *size = 0;
2205         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2206                 return -EIO;
2207         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2208                 READ_BUF(8);
2209                 READ64(*size);
2210                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2211                 ret = NFS_ATTR_FATTR_SIZE;
2212         }
2213         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2214         return ret;
2215 }
2216
2217 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2218 {
2219         __be32 *p;
2220
2221         *res = 0;
2222         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2223                 return -EIO;
2224         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2225                 READ_BUF(4);
2226                 READ32(*res);
2227                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2228         }
2229         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2230         return 0;
2231 }
2232
2233 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2234 {
2235         __be32 *p;
2236
2237         *res = 0;
2238         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2239                 return -EIO;
2240         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2241                 READ_BUF(4);
2242                 READ32(*res);
2243                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2244         }
2245         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2246         return 0;
2247 }
2248
2249 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2250 {
2251         __be32 *p;
2252         int ret = 0;
2253
2254         fsid->major = 0;
2255         fsid->minor = 0;
2256         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2257                 return -EIO;
2258         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2259                 READ_BUF(16);
2260                 READ64(fsid->major);
2261                 READ64(fsid->minor);
2262                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2263                 ret = NFS_ATTR_FATTR_FSID;
2264         }
2265         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2266                         (unsigned long long)fsid->major,
2267                         (unsigned long long)fsid->minor);
2268         return ret;
2269 }
2270
2271 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2272 {
2273         __be32 *p;
2274
2275         *res = 60;
2276         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2277                 return -EIO;
2278         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2279                 READ_BUF(4);
2280                 READ32(*res);
2281                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2282         }
2283         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2284         return 0;
2285 }
2286
2287 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2288 {
2289         __be32 *p;
2290
2291         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2292         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2293                 return -EIO;
2294         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2295                 READ_BUF(4);
2296                 READ32(*res);
2297                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2298         }
2299         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2300         return 0;
2301 }
2302
2303 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2304 {
2305         __be32 *p;
2306         int ret = 0;
2307
2308         *fileid = 0;
2309         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2310                 return -EIO;
2311         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2312                 READ_BUF(8);
2313                 READ64(*fileid);
2314                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2315                 ret = NFS_ATTR_FATTR_FILEID;
2316         }
2317         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2318         return ret;
2319 }
2320
2321 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2322 {
2323         __be32 *p;
2324         int ret = 0;
2325
2326         *fileid = 0;
2327         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2328                 return -EIO;
2329         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2330                 READ_BUF(8);
2331                 READ64(*fileid);
2332                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2333                 ret = NFS_ATTR_FATTR_FILEID;
2334         }
2335         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2336         return ret;
2337 }
2338
2339 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2340 {
2341         __be32 *p;
2342         int status = 0;
2343
2344         *res = 0;
2345         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2346                 return -EIO;
2347         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2348                 READ_BUF(8);
2349                 READ64(*res);
2350                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2351         }
2352         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2353         return status;
2354 }
2355
2356 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2357 {
2358         __be32 *p;
2359         int status = 0;
2360
2361         *res = 0;
2362         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2363                 return -EIO;
2364         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2365                 READ_BUF(8);
2366                 READ64(*res);
2367                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2368         }
2369         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2370         return status;
2371 }
2372
2373 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2374 {
2375         __be32 *p;
2376         int status = 0;
2377
2378         *res = 0;
2379         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2380                 return -EIO;
2381         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2382                 READ_BUF(8);
2383                 READ64(*res);
2384                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2385         }
2386         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2387         return status;
2388 }
2389
2390 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2391 {
2392         u32 n;
2393         __be32 *p;
2394         int status = 0;
2395
2396         READ_BUF(4);
2397         READ32(n);
2398         if (n == 0)
2399                 goto root_path;
2400         dprintk("path ");
2401         path->ncomponents = 0;
2402         while (path->ncomponents < n) {
2403                 struct nfs4_string *component = &path->components[path->ncomponents];
2404                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2405                 if (unlikely(status != 0))
2406                         goto out_eio;
2407                 if (path->ncomponents != n)
2408                         dprintk("/");
2409                 dprintk("%s", component->data);
2410                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2411                         path->ncomponents++;
2412                 else {
2413                         dprintk("cannot parse %d components in path\n", n);
2414                         goto out_eio;
2415                 }
2416         }
2417 out:
2418         dprintk("\n");
2419         return status;
2420 root_path:
2421 /* a root pathname is sent as a zero component4 */
2422         path->ncomponents = 1;
2423         path->components[0].len=0;
2424         path->components[0].data=NULL;
2425         dprintk("path /\n");
2426         goto out;
2427 out_eio:
2428         dprintk(" status %d", status);
2429         status = -EIO;
2430         goto out;
2431 }
2432
2433 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2434 {
2435         int n;
2436         __be32 *p;
2437         int status = -EIO;
2438
2439         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2440                 goto out;
2441         status = 0;
2442         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2443                 goto out;
2444         dprintk("%s: fsroot ", __func__);
2445         status = decode_pathname(xdr, &res->fs_path);
2446         if (unlikely(status != 0))
2447                 goto out;
2448         READ_BUF(4);
2449         READ32(n);
2450         if (n <= 0)
2451                 goto out_eio;
2452         res->nlocations = 0;
2453         while (res->nlocations < n) {
2454                 u32 m;
2455                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2456
2457                 READ_BUF(4);
2458                 READ32(m);
2459
2460                 loc->nservers = 0;
2461                 dprintk("%s: servers ", __func__);
2462                 while (loc->nservers < m) {
2463                         struct nfs4_string *server = &loc->servers[loc->nservers];
2464                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2465                         if (unlikely(status != 0))
2466                                 goto out_eio;
2467                         dprintk("%s ", server->data);
2468                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2469                                 loc->nservers++;
2470                         else {
2471                                 unsigned int i;
2472                                 dprintk("%s: using first %u of %u servers "
2473                                         "returned for location %u\n",
2474                                                 __func__,
2475                                                 NFS4_FS_LOCATION_MAXSERVERS,
2476                                                 m, res->nlocations);
2477                                 for (i = loc->nservers; i < m; i++) {
2478                                         unsigned int len;
2479                                         char *data;
2480                                         status = decode_opaque_inline(xdr, &len, &data);
2481                                         if (unlikely(status != 0))
2482                                                 goto out_eio;
2483                                 }
2484                         }
2485                 }
2486                 status = decode_pathname(xdr, &loc->rootpath);
2487                 if (unlikely(status != 0))
2488                         goto out_eio;
2489                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2490                         res->nlocations++;
2491         }
2492         if (res->nlocations != 0)
2493                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2494 out:
2495         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2496         return status;
2497 out_eio:
2498         status = -EIO;
2499         goto out;
2500 }
2501
2502 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2503 {
2504         __be32 *p;
2505         int status = 0;
2506
2507         *res = 0;
2508         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2509                 return -EIO;
2510         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2511                 READ_BUF(8);
2512                 READ64(*res);
2513                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2514         }
2515         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2516         return status;
2517 }
2518
2519 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2520 {
2521         __be32 *p;
2522         int status = 0;
2523
2524         *maxlink = 1;
2525         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2526                 return -EIO;
2527         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2528                 READ_BUF(4);
2529                 READ32(*maxlink);
2530                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2531         }
2532         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2533         return status;
2534 }
2535
2536 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2537 {
2538         __be32 *p;
2539         int status = 0;
2540
2541         *maxname = 1024;
2542         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2543                 return -EIO;
2544         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2545                 READ_BUF(4);
2546                 READ32(*maxname);
2547                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2548         }
2549         dprintk("%s: maxname=%u\n", __func__, *maxname);
2550         return status;
2551 }
2552
2553 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2554 {
2555         __be32 *p;
2556         int status = 0;
2557
2558         *res = 1024;
2559         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2560                 return -EIO;
2561         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2562                 uint64_t maxread;
2563                 READ_BUF(8);
2564                 READ64(maxread);
2565                 if (maxread > 0x7FFFFFFF)
2566                         maxread = 0x7FFFFFFF;
2567                 *res = (uint32_t)maxread;
2568                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2569         }
2570         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2571         return status;
2572 }
2573
2574 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2575 {
2576         __be32 *p;
2577         int status = 0;
2578
2579         *res = 1024;
2580         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2581                 return -EIO;
2582         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2583                 uint64_t maxwrite;
2584                 READ_BUF(8);
2585                 READ64(maxwrite);
2586                 if (maxwrite > 0x7FFFFFFF)
2587                         maxwrite = 0x7FFFFFFF;
2588                 *res = (uint32_t)maxwrite;
2589                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2590         }
2591         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2592         return status;
2593 }
2594
2595 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2596 {
2597         uint32_t tmp;
2598         __be32 *p;
2599         int ret = 0;
2600
2601         *mode = 0;
2602         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2603                 return -EIO;
2604         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2605                 READ_BUF(4);
2606                 READ32(tmp);
2607                 *mode = tmp & ~S_IFMT;
2608                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2609                 ret = NFS_ATTR_FATTR_MODE;
2610         }
2611         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2612         return ret;
2613 }
2614
2615 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2616 {
2617         __be32 *p;
2618         int ret = 0;
2619
2620         *nlink = 1;
2621         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2622                 return -EIO;
2623         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2624                 READ_BUF(4);
2625                 READ32(*nlink);
2626                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2627                 ret = NFS_ATTR_FATTR_NLINK;
2628         }
2629         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2630         return ret;
2631 }
2632
2633 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2634 {
2635         uint32_t len;
2636         __be32 *p;
2637         int ret = 0;
2638
2639         *uid = -2;
2640         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2641                 return -EIO;
2642         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2643                 READ_BUF(4);
2644                 READ32(len);
2645                 READ_BUF(len);
2646                 if (len < XDR_MAX_NETOBJ) {
2647                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2648                                 ret = NFS_ATTR_FATTR_OWNER;
2649                         else
2650                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2651                                                 __func__);
2652                 } else
2653                         dprintk("%s: name too long (%u)!\n",
2654                                         __func__, len);
2655                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2656         }
2657         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2658         return ret;
2659 }
2660
2661 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2662 {
2663         uint32_t len;
2664         __be32 *p;
2665         int ret = 0;
2666
2667         *gid = -2;
2668         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2669                 return -EIO;
2670         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2671                 READ_BUF(4);
2672                 READ32(len);
2673                 READ_BUF(len);
2674                 if (len < XDR_MAX_NETOBJ) {
2675                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2676                                 ret = NFS_ATTR_FATTR_GROUP;
2677                         else
2678                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2679                                                 __func__);
2680                 } else
2681                         dprintk("%s: name too long (%u)!\n",
2682                                         __func__, len);
2683                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2684         }
2685         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2686         return ret;
2687 }
2688
2689 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2690 {
2691         uint32_t major = 0, minor = 0;
2692         __be32 *p;
2693         int ret = 0;
2694
2695         *rdev = MKDEV(0,0);
2696         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2697                 return -EIO;
2698         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2699                 dev_t tmp;
2700
2701                 READ_BUF(8);
2702                 READ32(major);
2703                 READ32(minor);
2704                 tmp = MKDEV(major, minor);
2705                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2706                         *rdev = tmp;
2707                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2708                 ret = NFS_ATTR_FATTR_RDEV;
2709         }
2710         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2711         return ret;
2712 }
2713
2714 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2715 {
2716         __be32 *p;
2717         int status = 0;
2718
2719         *res = 0;
2720         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2721                 return -EIO;
2722         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2723                 READ_BUF(8);
2724                 READ64(*res);
2725                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2726         }
2727         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2728         return status;
2729 }
2730
2731 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2732 {
2733         __be32 *p;
2734         int status = 0;
2735
2736         *res = 0;
2737         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2738                 return -EIO;
2739         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2740                 READ_BUF(8);
2741                 READ64(*res);
2742                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2743         }
2744         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2745         return status;
2746 }
2747
2748 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2749 {
2750         __be32 *p;
2751         int status = 0;
2752
2753         *res = 0;
2754         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2755                 return -EIO;
2756         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2757                 READ_BUF(8);
2758                 READ64(*res);
2759                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2760         }
2761         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2762         return status;
2763 }
2764
2765 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2766 {
2767         __be32 *p;
2768         int ret = 0;
2769
2770         *used = 0;
2771         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2772                 return -EIO;
2773         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2774                 READ_BUF(8);
2775                 READ64(*used);
2776                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2777                 ret = NFS_ATTR_FATTR_SPACE_USED;
2778         }
2779         dprintk("%s: space used=%Lu\n", __func__,
2780                         (unsigned long long)*used);
2781         return ret;
2782 }
2783
2784 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2785 {
2786         __be32 *p;
2787         uint64_t sec;
2788         uint32_t nsec;
2789
2790         READ_BUF(12);
2791         READ64(sec);
2792         READ32(nsec);
2793         time->tv_sec = (time_t)sec;
2794         time->tv_nsec = (long)nsec;
2795         return 0;
2796 }
2797
2798 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2799 {
2800         int status = 0;
2801
2802         time->tv_sec = 0;
2803         time->tv_nsec = 0;
2804         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2805                 return -EIO;
2806         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2807                 status = decode_attr_time(xdr, time);
2808                 if (status == 0)
2809                         status = NFS_ATTR_FATTR_ATIME;
2810                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2811         }
2812         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
2813         return status;
2814 }
2815
2816 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2817 {
2818         int status = 0;
2819
2820         time->tv_sec = 0;
2821         time->tv_nsec = 0;
2822         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2823                 return -EIO;
2824         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2825                 status = decode_attr_time(xdr, time);
2826                 if (status == 0)
2827                         status = NFS_ATTR_FATTR_CTIME;
2828                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2829         }
2830         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
2831         return status;
2832 }
2833
2834 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2835 {
2836         int status = 0;
2837
2838         time->tv_sec = 0;
2839         time->tv_nsec = 0;
2840         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2841                 return -EIO;
2842         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2843                 status = decode_attr_time(xdr, time);
2844                 if (status == 0)
2845                         status = NFS_ATTR_FATTR_MTIME;
2846                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2847         }
2848         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
2849         return status;
2850 }
2851
2852 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2853 {
2854         unsigned int attrwords = XDR_QUADLEN(attrlen);
2855         unsigned int nwords = xdr->p - savep;
2856
2857         if (unlikely(attrwords != nwords)) {
2858                 dprintk("%s: server returned incorrect attribute length: "
2859                         "%u %c %u\n",
2860                                 __func__,
2861                                 attrwords << 2,
2862                                 (attrwords < nwords) ? '<' : '>',
2863                                 nwords << 2);
2864                 return -EIO;
2865         }
2866         return 0;
2867 }
2868
2869 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2870 {
2871         __be32 *p;
2872
2873         READ_BUF(20);
2874         READ32(cinfo->atomic);
2875         READ64(cinfo->before);
2876         READ64(cinfo->after);
2877         return 0;
2878 }
2879
2880 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2881 {
2882         __be32 *p;
2883         uint32_t supp, acc;
2884         int status;
2885
2886         status = decode_op_hdr(xdr, OP_ACCESS);
2887         if (status)
2888                 return status;
2889         READ_BUF(8);
2890         READ32(supp);
2891         READ32(acc);
2892         access->supported = supp;
2893         access->access = acc;
2894         return 0;
2895 }
2896
2897 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2898 {
2899         __be32 *p;
2900         int status;
2901
2902         status = decode_op_hdr(xdr, OP_CLOSE);
2903         if (status != -EIO)
2904                 nfs_increment_open_seqid(status, res->seqid);
2905         if (status)
2906                 return status;
2907         READ_BUF(NFS4_STATEID_SIZE);
2908         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
2909         return 0;
2910 }
2911
2912 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
2913 {
2914         __be32 *p;
2915         int status;
2916
2917         status = decode_op_hdr(xdr, OP_COMMIT);
2918         if (status)
2919                 return status;
2920         READ_BUF(8);
2921         COPYMEM(res->verf->verifier, 8);
2922         return 0;
2923 }
2924
2925 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2926 {
2927         __be32 *p;
2928         uint32_t bmlen;
2929         int status;
2930
2931         status = decode_op_hdr(xdr, OP_CREATE);
2932         if (status)
2933                 return status;
2934         if ((status = decode_change_info(xdr, cinfo)))
2935                 return status;
2936         READ_BUF(4);
2937         READ32(bmlen);
2938         READ_BUF(bmlen << 2);
2939         return 0;
2940 }
2941
2942 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
2943 {
2944         __be32 *savep;
2945         uint32_t attrlen, bitmap[2] = {0};
2946         int status;
2947
2948         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2949                 goto xdr_error;
2950         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2951                 goto xdr_error;
2952         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2953                 goto xdr_error;
2954         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
2955                 goto xdr_error;
2956         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
2957                 goto xdr_error;
2958         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
2959                 goto xdr_error;
2960         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
2961                 goto xdr_error;
2962         status = verify_attr_len(xdr, savep, attrlen);
2963 xdr_error:
2964         dprintk("%s: xdr returned %d!\n", __func__, -status);
2965         return status;
2966 }
2967
2968 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
2969 {
2970         __be32 *savep;
2971         uint32_t attrlen, bitmap[2] = {0};
2972         int status;
2973
2974         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
2975                 goto xdr_error;
2976         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
2977                 goto xdr_error;
2978         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
2979                 goto xdr_error;
2980
2981         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
2982                 goto xdr_error;
2983         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
2984                 goto xdr_error;
2985         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
2986                 goto xdr_error;
2987         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
2988                 goto xdr_error;
2989         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
2990                 goto xdr_error;
2991         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
2992                 goto xdr_error;
2993
2994         status = verify_attr_len(xdr, savep, attrlen);
2995 xdr_error:
2996         dprintk("%s: xdr returned %d!\n", __func__, -status);
2997         return status;
2998 }
2999
3000 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3001 {
3002         __be32 *savep;
3003         uint32_t attrlen, bitmap[2] = {0};
3004         int status;
3005
3006         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3007                 goto xdr_error;
3008         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3009                 goto xdr_error;
3010         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3011                 goto xdr_error;
3012
3013         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3014                 goto xdr_error;
3015         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3016                 goto xdr_error;
3017
3018         status = verify_attr_len(xdr, savep, attrlen);
3019 xdr_error:
3020         dprintk("%s: xdr returned %d!\n", __func__, -status);
3021         return status;
3022 }
3023
3024 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3025 {
3026         __be32 *savep;
3027         uint32_t attrlen,
3028                  bitmap[2] = {0},
3029                  type;
3030         int status;
3031         umode_t fmode = 0;
3032         uint64_t fileid;
3033
3034         status = decode_op_hdr(xdr, OP_GETATTR);
3035         if (status < 0)
3036                 goto xdr_error;
3037
3038         status = decode_attr_bitmap(xdr, bitmap);
3039         if (status < 0)
3040                 goto xdr_error;
3041
3042         status = decode_attr_length(xdr, &attrlen, &savep);
3043         if (status < 0)
3044                 goto xdr_error;
3045
3046
3047         status = decode_attr_type(xdr, bitmap, &type);
3048         if (status < 0)
3049                 goto xdr_error;
3050         fattr->mode = 0;
3051         if (status != 0) {
3052                 fattr->mode |= nfs_type2fmt[type];
3053                 fattr->valid |= status;
3054         }
3055
3056         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3057         if (status < 0)
3058                 goto xdr_error;
3059         fattr->valid |= status;
3060
3061         status = decode_attr_size(xdr, bitmap, &fattr->size);
3062         if (status < 0)
3063                 goto xdr_error;
3064         fattr->valid |= status;
3065
3066         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3067         if (status < 0)
3068                 goto xdr_error;
3069         fattr->valid |= status;
3070
3071         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3072         if (status < 0)
3073                 goto xdr_error;
3074         fattr->valid |= status;
3075
3076         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3077                                                 struct nfs4_fs_locations,
3078                                                 fattr));
3079         if (status < 0)
3080                 goto xdr_error;
3081         fattr->valid |= status;
3082
3083         status = decode_attr_mode(xdr, bitmap, &fmode);
3084         if (status < 0)
3085                 goto xdr_error;
3086         if (status != 0) {
3087                 fattr->mode |= fmode;
3088                 fattr->valid |= status;
3089         }
3090
3091         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3092         if (status < 0)
3093                 goto xdr_error;
3094         fattr->valid |= status;
3095
3096         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3097         if (status < 0)
3098                 goto xdr_error;
3099         fattr->valid |= status;
3100
3101         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3102         if (status < 0)
3103                 goto xdr_error;
3104         fattr->valid |= status;
3105
3106         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3107         if (status < 0)
3108                 goto xdr_error;
3109         fattr->valid |= status;
3110
3111         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3112         if (status < 0)
3113                 goto xdr_error;
3114         fattr->valid |= status;
3115
3116         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3117         if (status < 0)
3118                 goto xdr_error;
3119         fattr->valid |= status;
3120
3121         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3122         if (status < 0)
3123                 goto xdr_error;
3124         fattr->valid |= status;
3125
3126         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3127         if (status < 0)
3128                 goto xdr_error;
3129         fattr->valid |= status;
3130
3131         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3132         if (status < 0)
3133                 goto xdr_error;
3134         if (status != 0 && !(fattr->valid & status)) {
3135                 fattr->fileid = fileid;
3136                 fattr->valid |= status;
3137         }
3138
3139         status = verify_attr_len(xdr, savep, attrlen);
3140 xdr_error:
3141         dprintk("%s: xdr returned %d\n", __func__, -status);
3142         return status;
3143 }
3144
3145
3146 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3147 {
3148         __be32 *savep;
3149         uint32_t attrlen, bitmap[2];
3150         int status;
3151
3152         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3153                 goto xdr_error;
3154         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3155                 goto xdr_error;
3156         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3157                 goto xdr_error;
3158
3159         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3160
3161         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3162                 goto xdr_error;
3163         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3164                 goto xdr_error;
3165         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3166                 goto xdr_error;
3167         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3168         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3169                 goto xdr_error;
3170         fsinfo->wtpref = fsinfo->wtmax;
3171
3172         status = verify_attr_len(xdr, savep, attrlen);
3173 xdr_error:
3174         dprintk("%s: xdr returned %d!\n", __func__, -status);
3175         return status;
3176 }
3177
3178 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3179 {
3180         __be32 *p;
3181         uint32_t len;
3182         int status;
3183
3184         /* Zero handle first to allow comparisons */
3185         memset(fh, 0, sizeof(*fh));
3186
3187         status = decode_op_hdr(xdr, OP_GETFH);
3188         if (status)
3189                 return status;
3190
3191         READ_BUF(4);
3192         READ32(len);
3193         if (len > NFS4_FHSIZE)
3194                 return -EIO;
3195         fh->size = len;
3196         READ_BUF(len);
3197         COPYMEM(fh->data, len);
3198         return 0;
3199 }
3200
3201 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3202 {
3203         int status;
3204
3205         status = decode_op_hdr(xdr, OP_LINK);
3206         if (status)
3207                 return status;
3208         return decode_change_info(xdr, cinfo);
3209 }
3210
3211 /*
3212  * We create the owner, so we know a proper owner.id length is 4.
3213  */
3214 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3215 {
3216         uint64_t offset, length, clientid;
3217         __be32 *p;
3218         uint32_t namelen, type;
3219
3220         READ_BUF(32);
3221         READ64(offset);
3222         READ64(length);
3223         READ32(type);
3224         if (fl != NULL) {
3225                 fl->fl_start = (loff_t)offset;
3226                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3227                 if (length == ~(uint64_t)0)
3228                         fl->fl_end = OFFSET_MAX;
3229                 fl->fl_type = F_WRLCK;
3230                 if (type & 1)
3231                         fl->fl_type = F_RDLCK;
3232                 fl->fl_pid = 0;
3233         }
3234         READ64(clientid);
3235         READ32(namelen);
3236         READ_BUF(namelen);
3237         return -NFS4ERR_DENIED;
3238 }
3239
3240 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3241 {
3242         __be32 *p;
3243         int status;
3244
3245         status = decode_op_hdr(xdr, OP_LOCK);
3246         if (status == -EIO)
3247                 goto out;
3248         if (status == 0) {
3249                 READ_BUF(NFS4_STATEID_SIZE);
3250                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3251         } else if (status == -NFS4ERR_DENIED)
3252                 status = decode_lock_denied(xdr, NULL);
3253         if (res->open_seqid != NULL)
3254                 nfs_increment_open_seqid(status, res->open_seqid);
3255         nfs_increment_lock_seqid(status, res->lock_seqid);
3256 out:
3257         return status;
3258 }
3259
3260 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3261 {
3262         int status;
3263         status = decode_op_hdr(xdr, OP_LOCKT);
3264         if (status == -NFS4ERR_DENIED)
3265                 return decode_lock_denied(xdr, res->denied);
3266         return status;
3267 }
3268
3269 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3270 {
3271         __be32 *p;
3272         int status;
3273
3274         status = decode_op_hdr(xdr, OP_LOCKU);
3275         if (status != -EIO)
3276                 nfs_increment_lock_seqid(status, res->seqid);
3277         if (status == 0) {
3278                 READ_BUF(NFS4_STATEID_SIZE);
3279                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3280         }
3281         return status;
3282 }
3283
3284 static int decode_lookup(struct xdr_stream *xdr)
3285 {
3286         return decode_op_hdr(xdr, OP_LOOKUP);
3287 }
3288
3289 /* This is too sick! */
3290 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3291 {
3292         __be32 *p;
3293         uint32_t limit_type, nblocks, blocksize;
3294
3295         READ_BUF(12);
3296         READ32(limit_type);
3297         switch (limit_type) {
3298         case 1:
3299                 READ64(*maxsize);
3300                 break;
3301         case 2:
3302                 READ32(nblocks);
3303                 READ32(blocksize);
3304                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3305         }
3306         return 0;
3307 }
3308
3309 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3310 {
3311         __be32 *p;
3312         uint32_t delegation_type;
3313
3314         READ_BUF(4);
3315         READ32(delegation_type);
3316         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3317                 res->delegation_type = 0;
3318                 return 0;
3319         }
3320         READ_BUF(NFS4_STATEID_SIZE+4);
3321         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3322         READ32(res->do_recall);
3323
3324         switch (delegation_type) {
3325         case NFS4_OPEN_DELEGATE_READ:
3326                 res->delegation_type = FMODE_READ;
3327                 break;
3328         case NFS4_OPEN_DELEGATE_WRITE:
3329                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3330                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3331                                 return -EIO;
3332         }
3333         return decode_ace(xdr, NULL, res->server->nfs_client);
3334 }
3335
3336 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3337 {
3338         __be32 *p;
3339         uint32_t savewords, bmlen, i;
3340         int status;
3341
3342         status = decode_op_hdr(xdr, OP_OPEN);
3343         if (status != -EIO)
3344                 nfs_increment_open_seqid(status, res->seqid);
3345         if (status)
3346                 return status;
3347         READ_BUF(NFS4_STATEID_SIZE);
3348         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3349
3350         decode_change_info(xdr, &res->cinfo);
3351
3352         READ_BUF(8);
3353         READ32(res->rflags);
3354         READ32(bmlen);
3355         if (bmlen > 10)
3356                 goto xdr_error;
3357
3358         READ_BUF(bmlen << 2);
3359         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3360         for (i = 0; i < savewords; ++i)
3361                 READ32(res->attrset[i]);
3362         for (; i < NFS4_BITMAP_SIZE; i++)
3363                 res->attrset[i] = 0;
3364
3365         return decode_delegation(xdr, res);
3366 xdr_error:
3367         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3368         return -EIO;
3369 }
3370
3371 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3372 {
3373         __be32 *p;
3374         int status;
3375
3376         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3377         if (status != -EIO)
3378                 nfs_increment_open_seqid(status, res->seqid);
3379         if (status)
3380                 return status;
3381         READ_BUF(NFS4_STATEID_SIZE);
3382         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3383         return 0;
3384 }
3385
3386 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3387 {
3388         __be32 *p;
3389         int status;
3390
3391         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3392         if (status != -EIO)
3393                 nfs_increment_open_seqid(status, res->seqid);
3394         if (status)
3395                 return status;
3396         READ_BUF(NFS4_STATEID_SIZE);
3397         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3398         return 0;
3399 }
3400
3401 static int decode_putfh(struct xdr_stream *xdr)
3402 {
3403         return decode_op_hdr(xdr, OP_PUTFH);
3404 }
3405
3406 static int decode_putrootfh(struct xdr_stream *xdr)
3407 {
3408         return decode_op_hdr(xdr, OP_PUTROOTFH);
3409 }
3410
3411 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3412 {
3413         struct kvec *iov = req->rq_rcv_buf.head;
3414         __be32 *p;
3415         uint32_t count, eof, recvd, hdrlen;
3416         int status;
3417
3418         status = decode_op_hdr(xdr, OP_READ);
3419         if (status)
3420                 return status;
3421         READ_BUF(8);
3422         READ32(eof);
3423         READ32(count);
3424         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3425         recvd = req->rq_rcv_buf.len - hdrlen;
3426         if (count > recvd) {
3427                 dprintk("NFS: server cheating in read reply: "
3428                                 "count %u > recvd %u\n", count, recvd);
3429                 count = recvd;
3430                 eof = 0;
3431         }
3432         xdr_read_pages(xdr, count);
3433         res->eof = eof;
3434         res->count = count;
3435         return 0;
3436 }
3437
3438 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3439 {
3440         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3441         struct page     *page = *rcvbuf->pages;
3442         struct kvec     *iov = rcvbuf->head;
3443         size_t          hdrlen;
3444         u32             recvd, pglen = rcvbuf->page_len;
3445         __be32          *end, *entry, *p, *kaddr;
3446         unsigned int    nr = 0;
3447         int             status;
3448
3449         status = decode_op_hdr(xdr, OP_READDIR);
3450         if (status)
3451                 return status;
3452         READ_BUF(8);
3453         COPYMEM(readdir->verifier.data, 8);
3454         dprintk("%s: verifier = %08x:%08x\n",
3455                         __func__,
3456                         ((u32 *)readdir->verifier.data)[0],
3457                         ((u32 *)readdir->verifier.data)[1]);
3458
3459
3460         hdrlen = (char *) p - (char *) iov->iov_base;
3461         recvd = rcvbuf->len - hdrlen;
3462         if (pglen > recvd)
3463                 pglen = recvd;
3464         xdr_read_pages(xdr, pglen);
3465
3466         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3467         kaddr = p = kmap_atomic(page, KM_USER0);
3468         end = p + ((pglen + readdir->pgbase) >> 2);
3469         entry = p;
3470
3471         /* Make sure the packet actually has a value_follows and EOF entry */
3472         if ((entry + 1) > end)
3473                 goto short_pkt;
3474
3475         for (; *p++; nr++) {
3476                 u32 len, attrlen, xlen;
3477                 if (end - p < 3)
3478                         goto short_pkt;
3479                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3480                 p += 2;                 /* cookie */
3481                 len = ntohl(*p++);      /* filename length */
3482                 if (len > NFS4_MAXNAMLEN) {
3483                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3484                                         len);
3485                         goto err_unmap;
3486                 }
3487                 xlen = XDR_QUADLEN(len);
3488                 if (end - p < xlen + 1)
3489                         goto short_pkt;
3490                 dprintk("filename = %*s\n", len, (char *)p);
3491                 p += xlen;
3492                 len = ntohl(*p++);      /* bitmap length */
3493                 if (end - p < len + 1)
3494                         goto short_pkt;
3495                 p += len;
3496                 attrlen = XDR_QUADLEN(ntohl(*p++));
3497                 if (end - p < attrlen + 2)
3498                         goto short_pkt;
3499                 p += attrlen;           /* attributes */
3500                 entry = p;
3501         }
3502         /*
3503          * Apparently some server sends responses that are a valid size, but
3504          * contain no entries, and have value_follows==0 and EOF==0. For
3505          * those, just set the EOF marker.
3506          */
3507         if (!nr && entry[1] == 0) {
3508                 dprintk("NFS: readdir reply truncated!\n");
3509                 entry[1] = 1;
3510         }
3511 out:
3512         kunmap_atomic(kaddr, KM_USER0);
3513         return 0;
3514 short_pkt:
3515         /*
3516          * When we get a short packet there are 2 possibilities. We can
3517          * return an error, or fix up the response to look like a valid
3518          * response and return what we have so far. If there are no
3519          * entries and the packet was short, then return -EIO. If there
3520          * are valid entries in the response, return them and pretend that
3521          * the call was successful, but incomplete. The caller can retry the
3522          * readdir starting at the last cookie.
3523          */
3524         dprintk("%s: short packet at entry %d\n", __func__, nr);
3525         entry[0] = entry[1] = 0;
3526         if (nr)
3527                 goto out;
3528 err_unmap:
3529         kunmap_atomic(kaddr, KM_USER0);
3530         return -errno_NFSERR_IO;
3531 }
3532
3533 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3534 {
3535         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3536         struct kvec *iov = rcvbuf->head;
3537         size_t hdrlen;
3538         u32 len, recvd;
3539         __be32 *p;
3540         char *kaddr;
3541         int status;
3542
3543         status = decode_op_hdr(xdr, OP_READLINK);
3544         if (status)
3545                 return status;
3546
3547         /* Convert length of symlink */
3548         READ_BUF(4);
3549         READ32(len);
3550         if (len >= rcvbuf->page_len || len <= 0) {
3551                 dprintk("nfs: server returned giant symlink!\n");
3552                 return -ENAMETOOLONG;
3553         }
3554         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3555         recvd = req->rq_rcv_buf.len - hdrlen;
3556         if (recvd < len) {
3557                 dprintk("NFS: server cheating in readlink reply: "
3558                                 "count %u > recvd %u\n", len, recvd);
3559                 return -EIO;
3560         }
3561         xdr_read_pages(xdr, len);
3562         /*
3563          * The XDR encode routine has set things up so that
3564          * the link text will be copied directly into the
3565          * buffer.  We just have to do overflow-checking,
3566          * and and null-terminate the text (the VFS expects
3567          * null-termination).
3568          */
3569         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3570         kaddr[len+rcvbuf->page_base] = '\0';
3571         kunmap_atomic(kaddr, KM_USER0);
3572         return 0;
3573 }
3574
3575 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3576 {
3577         int status;
3578
3579         status = decode_op_hdr(xdr, OP_REMOVE);
3580         if (status)
3581                 goto out;
3582         status = decode_change_info(xdr, cinfo);
3583 out:
3584         return status;
3585 }
3586
3587 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3588               struct nfs4_change_info *new_cinfo)
3589 {
3590         int status;
3591
3592         status = decode_op_hdr(xdr, OP_RENAME);
3593         if (status)
3594                 goto out;
3595         if ((status = decode_change_info(xdr, old_cinfo)))
3596                 goto out;
3597         status = decode_change_info(xdr, new_cinfo);
3598 out:
3599         return status;
3600 }
3601
3602 static int decode_renew(struct xdr_stream *xdr)
3603 {
3604         return decode_op_hdr(xdr, OP_RENEW);
3605 }
3606
3607 static int
3608 decode_restorefh(struct xdr_stream *xdr)
3609 {
3610         return decode_op_hdr(xdr, OP_RESTOREFH);
3611 }
3612
3613 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3614                 size_t *acl_len)
3615 {
3616         __be32 *savep;
3617         uint32_t attrlen,
3618                  bitmap[2] = {0};
3619         struct kvec *iov = req->rq_rcv_buf.head;
3620         int status;
3621
3622         *acl_len = 0;
3623         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3624                 goto out;
3625         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3626                 goto out;
3627         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3628                 goto out;
3629
3630         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3631                 return -EIO;
3632         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3633                 size_t hdrlen;
3634                 u32 recvd;
3635
3636                 /* We ignore &savep and don't do consistency checks on
3637                  * the attr length.  Let userspace figure it out.... */
3638                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3639                 recvd = req->rq_rcv_buf.len - hdrlen;
3640                 if (attrlen > recvd) {
3641                         dprintk("NFS: server cheating in getattr"
3642                                         " acl reply: attrlen %u > recvd %u\n",
3643                                         attrlen, recvd);
3644                         return -EINVAL;
3645                 }
3646                 xdr_read_pages(xdr, attrlen);
3647                 *acl_len = attrlen;
3648         } else
3649                 status = -EOPNOTSUPP;
3650
3651 out:
3652         return status;
3653 }
3654
3655 static int
3656 decode_savefh(struct xdr_stream *xdr)
3657 {
3658         return decode_op_hdr(xdr, OP_SAVEFH);
3659 }
3660
3661 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3662 {
3663         __be32 *p;
3664         uint32_t bmlen;
3665         int status;
3666
3667         status = decode_op_hdr(xdr, OP_SETATTR);
3668         if (status)
3669                 return status;
3670         READ_BUF(4);
3671         READ32(bmlen);
3672         READ_BUF(bmlen << 2);
3673         return 0;
3674 }
3675
3676 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3677 {
3678         __be32 *p;
3679         uint32_t opnum;
3680         int32_t nfserr;
3681
3682         READ_BUF(8);
3683         READ32(opnum);
3684         if (opnum != OP_SETCLIENTID) {
3685                 dprintk("nfs: decode_setclientid: Server returned operation"
3686                         " %d\n", opnum);
3687                 return -EIO;
3688         }
3689         READ32(nfserr);
3690         if (nfserr == NFS_OK) {
3691                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3692                 READ64(clp->cl_clientid);
3693                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3694         } else if (nfserr == NFSERR_CLID_INUSE) {
3695                 uint32_t len;
3696
3697                 /* skip netid string */
3698                 READ_BUF(4);
3699                 READ32(len);
3700                 READ_BUF(len);
3701
3702                 /* skip uaddr string */
3703                 READ_BUF(4);
3704                 READ32(len);
3705                 READ_BUF(len);
3706                 return -NFSERR_CLID_INUSE;
3707         } else
3708                 return nfs4_stat_to_errno(nfserr);
3709
3710         return 0;
3711 }
3712
3713 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3714 {
3715         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3716 }
3717
3718 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3719 {
3720         __be32 *p;
3721         int status;
3722
3723         status = decode_op_hdr(xdr, OP_WRITE);
3724         if (status)
3725                 return status;
3726
3727         READ_BUF(16);
3728         READ32(res->count);
3729         READ32(res->verf->committed);
3730         COPYMEM(res->verf->verifier, 8);
3731         return 0;
3732 }
3733
3734 static int decode_delegreturn(struct xdr_stream *xdr)
3735 {
3736         return decode_op_hdr(xdr, OP_DELEGRETURN);
3737 }
3738
3739 /*
3740  * END OF "GENERIC" DECODE ROUTINES.
3741  */
3742
3743 /*
3744  * Decode OPEN_DOWNGRADE response
3745  */
3746 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3747 {
3748         struct xdr_stream xdr;
3749         struct compound_hdr hdr;
3750         int status;
3751
3752         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3753         status = decode_compound_hdr(&xdr, &hdr);
3754         if (status)
3755                 goto out;
3756         status = decode_putfh(&xdr);
3757         if (status)
3758                 goto out;
3759         status = decode_open_downgrade(&xdr, res);
3760         if (status != 0)
3761                 goto out;
3762         decode_getfattr(&xdr, res->fattr, res->server);
3763 out:
3764         return status;
3765 }
3766
3767 /*
3768  * Decode ACCESS response
3769  */
3770 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3771 {
3772         struct xdr_stream xdr;
3773         struct compound_hdr hdr;
3774         int status;
3775
3776         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3777         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3778                 goto out;
3779         status = decode_putfh(&xdr);
3780         if (status != 0)
3781                 goto out;
3782         status = decode_access(&xdr, res);
3783         if (status != 0)
3784                 goto out;
3785         decode_getfattr(&xdr, res->fattr, res->server);
3786 out:
3787         return status;
3788 }
3789
3790 /*
3791  * Decode LOOKUP response
3792  */
3793 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3794 {
3795         struct xdr_stream xdr;
3796         struct compound_hdr hdr;
3797         int status;
3798
3799         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3800         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3801                 goto out;
3802         if ((status = decode_putfh(&xdr)) != 0)
3803                 goto out;
3804         if ((status = decode_lookup(&xdr)) != 0)
3805                 goto out;
3806         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3807                 goto out;
3808         status = decode_getfattr(&xdr, res->fattr, res->server);
3809 out:
3810         return status;
3811 }
3812
3813 /*
3814  * Decode LOOKUP_ROOT response
3815  */
3816 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3817 {
3818         struct xdr_stream xdr;
3819         struct compound_hdr hdr;
3820         int status;
3821
3822         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3823         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3824                 goto out;
3825         if ((status = decode_putrootfh(&xdr)) != 0)
3826                 goto out;
3827         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3828                 status = decode_getfattr(&xdr, res->fattr, res->server);
3829 out:
3830         return status;
3831 }
3832
3833 /*
3834  * Decode REMOVE response
3835  */
3836 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3837 {
3838         struct xdr_stream xdr;
3839         struct compound_hdr hdr;
3840         int status;
3841
3842         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3843         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3844                 goto out;
3845         if ((status = decode_putfh(&xdr)) != 0)
3846                 goto out;
3847         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3848                 goto out;
3849         decode_getfattr(&xdr, &res->dir_attr, res->server);
3850 out:
3851         return status;
3852 }
3853
3854 /*
3855  * Decode RENAME response
3856  */
3857 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3858 {
3859         struct xdr_stream xdr;
3860         struct compound_hdr hdr;
3861         int status;
3862
3863         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3864         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3865                 goto out;
3866         if ((status = decode_putfh(&xdr)) != 0)
3867                 goto out;
3868         if ((status = decode_savefh(&xdr)) != 0)
3869                 goto out;
3870         if ((status = decode_putfh(&xdr)) != 0)
3871                 goto out;
3872         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3873                 goto out;
3874         /* Current FH is target directory */
3875         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3876                 goto out;
3877         if ((status = decode_restorefh(&xdr)) != 0)
3878                 goto out;
3879         decode_getfattr(&xdr, res->old_fattr, res->server);
3880 out:
3881         return status;
3882 }
3883
3884 /*
3885  * Decode LINK response
3886  */
3887 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3888 {
3889         struct xdr_stream xdr;
3890         struct compound_hdr hdr;
3891         int status;
3892
3893         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3894         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3895                 goto out;
3896         if ((status = decode_putfh(&xdr)) != 0)
3897                 goto out;
3898         if ((status = decode_savefh(&xdr)) != 0)
3899                 goto out;
3900         if ((status = decode_putfh(&xdr)) != 0)
3901                 goto out;
3902         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3903                 goto out;
3904         /*
3905          * Note order: OP_LINK leaves the directory as the current
3906          *             filehandle.
3907          */
3908         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3909                 goto out;
3910         if ((status = decode_restorefh(&xdr)) != 0)
3911                 goto out;
3912         decode_getfattr(&xdr, res->fattr, res->server);
3913 out:
3914         return status;
3915 }
3916
3917 /*
3918  * Decode CREATE response
3919  */
3920 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3921 {
3922         struct xdr_stream xdr;
3923         struct compound_hdr hdr;
3924         int status;
3925
3926         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3927         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3928                 goto out;
3929         if ((status = decode_putfh(&xdr)) != 0)
3930                 goto out;
3931         if ((status = decode_savefh(&xdr)) != 0)
3932                 goto out;
3933         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3934                 goto out;
3935         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3936                 goto out;
3937         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3938                 goto out;
3939         if ((status = decode_restorefh(&xdr)) != 0)
3940                 goto out;
3941         decode_getfattr(&xdr, res->dir_fattr, res->server);
3942 out:
3943         return status;
3944 }
3945
3946 /*
3947  * Decode SYMLINK response
3948  */
3949 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3950 {
3951         return nfs4_xdr_dec_create(rqstp, p, res);
3952 }
3953
3954 /*
3955  * Decode GETATTR response
3956  */
3957 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *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_getfattr(&xdr, res->fattr, res->server);
3971 out:
3972         return status;
3973 }
3974
3975 /*
3976  * Encode an SETACL request
3977  */
3978 static int
3979 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3980 {
3981         struct xdr_stream xdr;
3982         struct compound_hdr hdr = {
3983                 .nops   = 0,
3984         };
3985         int status;
3986
3987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3988         encode_compound_hdr(&xdr, &hdr);
3989         encode_putfh(&xdr, args->fh, &hdr);
3990         status = encode_setacl(&xdr, args, &hdr);
3991         encode_nops(&hdr);
3992         return status;
3993 }
3994
3995 /*
3996  * Decode SETACL response
3997  */
3998 static int
3999 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4000 {
4001         struct xdr_stream xdr;
4002         struct compound_hdr hdr;
4003         int status;
4004
4005         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4006         status = decode_compound_hdr(&xdr, &hdr);
4007         if (status)
4008                 goto out;
4009         status = decode_putfh(&xdr);
4010         if (status)
4011                 goto out;
4012         status = decode_setattr(&xdr, res);
4013 out:
4014         return status;
4015 }
4016
4017 /*
4018  * Decode GETACL response
4019  */
4020 static int
4021 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4022 {
4023         struct xdr_stream xdr;
4024         struct compound_hdr hdr;
4025         int status;
4026
4027         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4028         status = decode_compound_hdr(&xdr, &hdr);
4029         if (status)
4030                 goto out;
4031         status = decode_putfh(&xdr);
4032         if (status)
4033                 goto out;
4034         status = decode_getacl(&xdr, rqstp, acl_len);
4035
4036 out:
4037         return status;
4038 }
4039
4040 /*
4041  * Decode CLOSE response
4042  */
4043 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4044 {
4045         struct xdr_stream xdr;
4046         struct compound_hdr hdr;
4047         int status;
4048
4049         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4050         status = decode_compound_hdr(&xdr, &hdr);
4051         if (status)
4052                 goto out;
4053         status = decode_putfh(&xdr);
4054         if (status)
4055                 goto out;
4056         status = decode_close(&xdr, res);
4057         if (status != 0)
4058                 goto out;
4059         /*
4060          * Note: Server may do delete on close for this file
4061          *      in which case the getattr call will fail with
4062          *      an ESTALE error. Shouldn't be a problem,
4063          *      though, since fattr->valid will remain unset.
4064          */
4065         decode_getfattr(&xdr, res->fattr, res->server);
4066 out:
4067         return status;
4068 }
4069
4070 /*
4071  * Decode OPEN response
4072  */
4073 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4074 {
4075         struct xdr_stream xdr;
4076         struct compound_hdr hdr;
4077         int status;
4078
4079         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4080         status = decode_compound_hdr(&xdr, &hdr);
4081         if (status)
4082                 goto out;
4083         status = decode_putfh(&xdr);
4084         if (status)
4085                 goto out;
4086         status = decode_savefh(&xdr);
4087         if (status)
4088                 goto out;
4089         status = decode_open(&xdr, res);
4090         if (status)
4091                 goto out;
4092         if (decode_getfh(&xdr, &res->fh) != 0)
4093                 goto out;
4094         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4095                 goto out;
4096         if (decode_restorefh(&xdr) != 0)
4097                 goto out;
4098         decode_getfattr(&xdr, res->dir_attr, res->server);
4099 out:
4100         return status;
4101 }
4102
4103 /*
4104  * Decode OPEN_CONFIRM response
4105  */
4106 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4107 {
4108         struct xdr_stream xdr;
4109         struct compound_hdr hdr;
4110         int status;
4111
4112         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4113         status = decode_compound_hdr(&xdr, &hdr);
4114         if (status)
4115                 goto out;
4116         status = decode_putfh(&xdr);
4117         if (status)
4118                 goto out;
4119         status = decode_open_confirm(&xdr, res);
4120 out:
4121         return status;
4122 }
4123
4124 /*
4125  * Decode OPEN response
4126  */
4127 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4128 {
4129         struct xdr_stream xdr;
4130         struct compound_hdr hdr;
4131         int status;
4132
4133         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4134         status = decode_compound_hdr(&xdr, &hdr);
4135         if (status)
4136                 goto out;
4137         status = decode_putfh(&xdr);
4138         if (status)
4139                 goto out;
4140         status = decode_open(&xdr, res);
4141         if (status)
4142                 goto out;
4143         decode_getfattr(&xdr, res->f_attr, res->server);
4144 out:
4145         return status;
4146 }
4147
4148 /*
4149  * Decode SETATTR response
4150  */
4151 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4152 {
4153         struct xdr_stream xdr;
4154         struct compound_hdr hdr;
4155         int status;
4156
4157         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4158         status = decode_compound_hdr(&xdr, &hdr);
4159         if (status)
4160                 goto out;
4161         status = decode_putfh(&xdr);
4162         if (status)
4163                 goto out;
4164         status = decode_setattr(&xdr, res);
4165         if (status)
4166                 goto out;
4167         decode_getfattr(&xdr, res->fattr, res->server);
4168 out:
4169         return status;
4170 }
4171
4172 /*
4173  * Decode LOCK response
4174  */
4175 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_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_lock(&xdr, res);
4189 out:
4190         return status;
4191 }
4192
4193 /*
4194  * Decode LOCKT response
4195  */
4196 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *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_lockt(&xdr, res);
4210 out:
4211         return status;
4212 }
4213
4214 /*
4215  * Decode LOCKU response
4216  */
4217 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4218 {
4219         struct xdr_stream xdr;
4220         struct compound_hdr hdr;
4221         int status;
4222
4223         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4224         status = decode_compound_hdr(&xdr, &hdr);
4225         if (status)
4226                 goto out;
4227         status = decode_putfh(&xdr);
4228         if (status)
4229                 goto out;
4230         status = decode_locku(&xdr, res);
4231 out:
4232         return status;
4233 }
4234
4235 /*
4236  * Decode READLINK response
4237  */
4238 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4239                                  struct nfs4_readlink_res *res)
4240 {
4241         struct xdr_stream xdr;
4242         struct compound_hdr hdr;
4243         int status;
4244
4245         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4246         status = decode_compound_hdr(&xdr, &hdr);
4247         if (status)
4248                 goto out;
4249         status = decode_putfh(&xdr);
4250         if (status)
4251                 goto out;
4252         status = decode_readlink(&xdr, rqstp);
4253 out:
4254         return status;
4255 }
4256
4257 /*
4258  * Decode READDIR response
4259  */
4260 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4261 {
4262         struct xdr_stream xdr;
4263         struct compound_hdr hdr;
4264         int status;
4265
4266         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4267         status = decode_compound_hdr(&xdr, &hdr);
4268         if (status)
4269                 goto out;
4270         status = decode_putfh(&xdr);
4271         if (status)
4272                 goto out;
4273         status = decode_readdir(&xdr, rqstp, res);
4274 out:
4275         return status;
4276 }
4277
4278 /*
4279  * Decode Read response
4280  */
4281 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4282 {
4283         struct xdr_stream xdr;
4284         struct compound_hdr hdr;
4285         int status;
4286
4287         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4288         status = decode_compound_hdr(&xdr, &hdr);
4289         if (status)
4290                 goto out;
4291         status = decode_putfh(&xdr);
4292         if (status)
4293                 goto out;
4294         status = decode_read(&xdr, rqstp, res);
4295         if (!status)
4296                 status = res->count;
4297 out:
4298         return status;
4299 }
4300
4301 /*
4302  * Decode WRITE response
4303  */
4304 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4305 {
4306         struct xdr_stream xdr;
4307         struct compound_hdr hdr;
4308         int status;
4309
4310         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4311         status = decode_compound_hdr(&xdr, &hdr);
4312         if (status)
4313                 goto out;
4314         status = decode_putfh(&xdr);
4315         if (status)
4316                 goto out;
4317         status = decode_write(&xdr, res);
4318         if (status)
4319                 goto out;
4320         decode_getfattr(&xdr, res->fattr, res->server);
4321         if (!status)
4322                 status = res->count;
4323 out:
4324         return status;
4325 }
4326
4327 /*
4328  * Decode COMMIT response
4329  */
4330 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4331 {
4332         struct xdr_stream xdr;
4333         struct compound_hdr hdr;
4334         int status;
4335
4336         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4337         status = decode_compound_hdr(&xdr, &hdr);
4338         if (status)
4339                 goto out;
4340         status = decode_putfh(&xdr);
4341         if (status)
4342                 goto out;
4343         status = decode_commit(&xdr, res);
4344         if (status)
4345                 goto out;
4346         decode_getfattr(&xdr, res->fattr, res->server);
4347 out:
4348         return status;
4349 }
4350
4351 /*
4352  * FSINFO request
4353  */
4354 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4355 {
4356         struct xdr_stream xdr;
4357         struct compound_hdr hdr;
4358         int status;
4359
4360         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4361         status = decode_compound_hdr(&xdr, &hdr);
4362         if (!status)
4363                 status = decode_putfh(&xdr);
4364         if (!status)
4365                 status = decode_fsinfo(&xdr, fsinfo);
4366         return status;
4367 }
4368
4369 /*
4370  * PATHCONF request
4371  */
4372 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4373 {
4374         struct xdr_stream xdr;
4375         struct compound_hdr hdr;
4376         int status;
4377
4378         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4379         status = decode_compound_hdr(&xdr, &hdr);
4380         if (!status)
4381                 status = decode_putfh(&xdr);
4382         if (!status)
4383                 status = decode_pathconf(&xdr, pathconf);
4384         return status;
4385 }
4386
4387 /*
4388  * STATFS request
4389  */
4390 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4391 {
4392         struct xdr_stream xdr;
4393         struct compound_hdr hdr;
4394         int status;
4395
4396         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4397         status = decode_compound_hdr(&xdr, &hdr);
4398         if (!status)
4399                 status = decode_putfh(&xdr);
4400         if (!status)
4401                 status = decode_statfs(&xdr, fsstat);
4402         return status;
4403 }
4404
4405 /*
4406  * GETATTR_BITMAP request
4407  */
4408 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4409 {
4410         struct xdr_stream xdr;
4411         struct compound_hdr hdr;
4412         int status;
4413
4414         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4415         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4416                 goto out;
4417         if ((status = decode_putfh(&xdr)) != 0)
4418                 goto out;
4419         status = decode_server_caps(&xdr, res);
4420 out:
4421         return status;
4422 }
4423
4424 /*
4425  * Decode RENEW response
4426  */
4427 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4428 {
4429         struct xdr_stream xdr;
4430         struct compound_hdr hdr;
4431         int status;
4432
4433         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4434         status = decode_compound_hdr(&xdr, &hdr);
4435         if (!status)
4436                 status = decode_renew(&xdr);
4437         return status;
4438 }
4439
4440 /*
4441  * a SETCLIENTID request
4442  */
4443 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4444                 struct nfs_client *clp)
4445 {
4446         struct xdr_stream xdr;
4447         struct compound_hdr hdr;
4448         int status;
4449
4450         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4451         status = decode_compound_hdr(&xdr, &hdr);
4452         if (!status)
4453                 status = decode_setclientid(&xdr, clp);
4454         return status;
4455 }
4456
4457 /*
4458  * a SETCLIENTID_CONFIRM request
4459  */
4460 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4461 {
4462         struct xdr_stream xdr;
4463         struct compound_hdr hdr;
4464         int status;
4465
4466         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4467         status = decode_compound_hdr(&xdr, &hdr);
4468         if (!status)
4469                 status = decode_setclientid_confirm(&xdr);
4470         if (!status)
4471                 status = decode_putrootfh(&xdr);
4472         if (!status)
4473                 status = decode_fsinfo(&xdr, fsinfo);
4474         return status;
4475 }
4476
4477 /*
4478  * DELEGRETURN request
4479  */
4480 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4481 {
4482         struct xdr_stream xdr;
4483         struct compound_hdr hdr;
4484         int status;
4485
4486         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4487         status = decode_compound_hdr(&xdr, &hdr);
4488         if (status != 0)
4489                 goto out;
4490         status = decode_putfh(&xdr);
4491         if (status != 0)
4492                 goto out;
4493         status = decode_delegreturn(&xdr);
4494         decode_getfattr(&xdr, res->fattr, res->server);
4495 out:
4496         return status;
4497 }
4498
4499 /*
4500  * FS_LOCATIONS request
4501  */
4502 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4503 {
4504         struct xdr_stream xdr;
4505         struct compound_hdr hdr;
4506         int status;
4507
4508         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4509         status = decode_compound_hdr(&xdr, &hdr);
4510         if (status != 0)
4511                 goto out;
4512         if ((status = decode_putfh(&xdr)) != 0)
4513                 goto out;
4514         if ((status = decode_lookup(&xdr)) != 0)
4515                 goto out;
4516         xdr_enter_page(&xdr, PAGE_SIZE);
4517         status = decode_getfattr(&xdr, &res->fattr, res->server);
4518 out:
4519         return status;
4520 }
4521
4522 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4523 {
4524         uint32_t bitmap[2] = {0};
4525         uint32_t len;
4526
4527         if (!*p++) {
4528                 if (!*p)
4529                         return ERR_PTR(-EAGAIN);
4530                 entry->eof = 1;
4531                 return ERR_PTR(-EBADCOOKIE);
4532         }
4533
4534         entry->prev_cookie = entry->cookie;
4535         p = xdr_decode_hyper(p, &entry->cookie);
4536         entry->len = ntohl(*p++);
4537         entry->name = (const char *) p;
4538         p += XDR_QUADLEN(entry->len);
4539
4540         /*
4541          * In case the server doesn't return an inode number,
4542          * we fake one here.  (We don't use inode number 0,
4543          * since glibc seems to choke on it...)
4544          */
4545         entry->ino = 1;
4546
4547         len = ntohl(*p++);              /* bitmap length */
4548         if (len-- > 0) {
4549                 bitmap[0] = ntohl(*p++);
4550                 if (len-- > 0) {
4551                         bitmap[1] = ntohl(*p++);
4552                         p += len;
4553                 }
4554         }
4555         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4556         if (len > 0) {
4557                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4558                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4559                         /* Ignore the return value of rdattr_error for now */
4560                         p++;
4561                         len--;
4562                 }
4563                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4564                         xdr_decode_hyper(p, &entry->ino);
4565                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4566                         xdr_decode_hyper(p, &entry->ino);
4567                 p += len;
4568         }
4569
4570         entry->eof = !p[0] && p[1];
4571         return p;
4572 }
4573
4574 /*
4575  * We need to translate between nfs status return values and
4576  * the local errno values which may not be the same.
4577  */
4578 static struct {
4579         int stat;
4580         int errno;
4581 } nfs_errtbl[] = {
4582         { NFS4_OK,              0               },
4583         { NFS4ERR_PERM,         -EPERM          },
4584         { NFS4ERR_NOENT,        -ENOENT         },
4585         { NFS4ERR_IO,           -errno_NFSERR_IO},
4586         { NFS4ERR_NXIO,         -ENXIO          },
4587         { NFS4ERR_ACCESS,       -EACCES         },
4588         { NFS4ERR_EXIST,        -EEXIST         },
4589         { NFS4ERR_XDEV,         -EXDEV          },
4590         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4591         { NFS4ERR_ISDIR,        -EISDIR         },
4592         { NFS4ERR_INVAL,        -EINVAL         },
4593         { NFS4ERR_FBIG,         -EFBIG          },
4594         { NFS4ERR_NOSPC,        -ENOSPC         },
4595         { NFS4ERR_ROFS,         -EROFS          },
4596         { NFS4ERR_MLINK,        -EMLINK         },
4597         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4598         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4599         { NFS4ERR_DQUOT,        -EDQUOT         },
4600         { NFS4ERR_STALE,        -ESTALE         },
4601         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4602         { NFS4ERR_BADOWNER,     -EINVAL         },
4603         { NFS4ERR_BADNAME,      -EINVAL         },
4604         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4605         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4606         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4607         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4608         { NFS4ERR_BADTYPE,      -EBADTYPE       },
4609         { NFS4ERR_LOCKED,       -EAGAIN         },
4610         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
4611         { NFS4ERR_SYMLINK,      -ELOOP          },
4612         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
4613         { NFS4ERR_DEADLOCK,     -EDEADLK        },
4614         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
4615                                                     * to be handled by a
4616                                                     * middle-layer.
4617                                                     */
4618         { -1,                   -EIO            }
4619 };
4620
4621 /*
4622  * Convert an NFS error code to a local one.
4623  * This one is used jointly by NFSv2 and NFSv3.
4624  */
4625 static int
4626 nfs4_stat_to_errno(int stat)
4627 {
4628         int i;
4629         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4630                 if (nfs_errtbl[i].stat == stat)
4631                         return nfs_errtbl[i].errno;
4632         }
4633         if (stat <= 10000 || stat > 10100) {
4634                 /* The server is looney tunes. */
4635                 return -ESERVERFAULT;
4636         }
4637         /* If we cannot translate the error, the recovery routines should
4638          * handle it.
4639          * Note: remaining NFSv4 error codes have values > 10000, so should
4640          * not conflict with native Linux error codes.
4641          */
4642         return -stat;
4643 }
4644
4645 #define PROC(proc, argtype, restype)                            \
4646 [NFSPROC4_CLNT_##proc] = {                                      \
4647         .p_proc   = NFSPROC4_COMPOUND,                          \
4648         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4649         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4650         .p_arglen = NFS4_##argtype##_sz,                        \
4651         .p_replen = NFS4_##restype##_sz,                        \
4652         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4653         .p_name   = #proc,                                      \
4654 }
4655
4656 struct rpc_procinfo     nfs4_procedures[] = {
4657   PROC(READ,            enc_read,       dec_read),
4658   PROC(WRITE,           enc_write,      dec_write),
4659   PROC(COMMIT,          enc_commit,     dec_commit),
4660   PROC(OPEN,            enc_open,       dec_open),
4661   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4662   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4663   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4664   PROC(CLOSE,           enc_close,      dec_close),
4665   PROC(SETATTR,         enc_setattr,    dec_setattr),
4666   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4667   PROC(RENEW,           enc_renew,      dec_renew),
4668   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4669   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4670   PROC(LOCK,            enc_lock,       dec_lock),
4671   PROC(LOCKT,           enc_lockt,      dec_lockt),
4672   PROC(LOCKU,           enc_locku,      dec_locku),
4673   PROC(ACCESS,          enc_access,     dec_access),
4674   PROC(GETATTR,         enc_getattr,    dec_getattr),
4675   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4676   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4677   PROC(REMOVE,          enc_remove,     dec_remove),
4678   PROC(RENAME,          enc_rename,     dec_rename),
4679   PROC(LINK,            enc_link,       dec_link),
4680   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4681   PROC(CREATE,          enc_create,     dec_create),
4682   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4683   PROC(STATFS,          enc_statfs,     dec_statfs),
4684   PROC(READLINK,        enc_readlink,   dec_readlink),
4685   PROC(READDIR,         enc_readdir,    dec_readdir),
4686   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4687   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4688   PROC(GETACL,          enc_getacl,     dec_getacl),
4689   PROC(SETACL,          enc_setacl,     dec_setacl),
4690   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4691 };
4692
4693 struct rpc_version              nfs_version4 = {
4694         .number                 = 4,
4695         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4696         .procs                  = nfs4_procedures
4697 };
4698
4699 /*
4700  * Local variables:
4701  *  c-basic-offset: 8
4702  * End:
4703  */