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     (op_encode_hdr_maxsz + 2)
 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                                 4 /*server->ip_addr*/ + \
 120                                 1 /*Netid*/ + \
 121                                 6 /*uaddr*/ + \
 122                                 6 + (NFS4_VERIFIER_SIZE >> 2))
 123 #define decode_setclientid_maxsz \
 124                                 (op_decode_hdr_maxsz + \
 125                                 2 + \
 126                                 1024) /* large value for CLID_INUSE */
 127 #define encode_setclientid_confirm_maxsz \
 128                                 (op_encode_hdr_maxsz + \
 129                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 130 #define decode_setclientid_confirm_maxsz \
 131                                 (op_decode_hdr_maxsz)
 132 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 133 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 134 #define encode_share_access_maxsz \
 135                                 (2)
 136 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 137 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 138 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 139 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 140                                 2 + encode_share_access_maxsz + 2 + \
 141                                 open_owner_id_maxsz + \
 142                                 encode_opentype_maxsz + \
 143                                 encode_claim_null_maxsz)
 144 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 145 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 146                                 decode_ace_maxsz)
 147 #define decode_change_info_maxsz        (5)
 148 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 149                                 decode_stateid_maxsz + \
 150                                 decode_change_info_maxsz + 1 + \
 151                                 nfs4_fattr_bitmap_maxsz + \
 152                                 decode_delegation_maxsz)
 153 #define encode_open_confirm_maxsz \
 154                                 (op_encode_hdr_maxsz + \
 155                                  encode_stateid_maxsz + 1)
 156 #define decode_open_confirm_maxsz \
 157                                 (op_decode_hdr_maxsz + \
 158                                  decode_stateid_maxsz)
 159 #define encode_open_downgrade_maxsz \
 160                                 (op_encode_hdr_maxsz + \
 161                                  encode_stateid_maxsz + 1 + \
 162                                  encode_share_access_maxsz)
 163 #define decode_open_downgrade_maxsz \
 164                                 (op_decode_hdr_maxsz + \
 165                                  decode_stateid_maxsz)
 166 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 167                                  1 + encode_stateid_maxsz)
 168 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 169                                  decode_stateid_maxsz)
 170 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 171                                  encode_stateid_maxsz + \
 172                                  encode_attrs_maxsz)
 173 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 174                                  nfs4_fattr_bitmap_maxsz)
 175 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 176                                  encode_stateid_maxsz + 3)
 177 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 178 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 179                                  2 + encode_verifier_maxsz + 5)
 180 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 181                                  decode_verifier_maxsz)
 182 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 183 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 184 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 185                                  encode_stateid_maxsz + 4)
 186 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 187                                  2 + decode_verifier_maxsz)
 188 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 189 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 190                                  decode_verifier_maxsz)
 191 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 192                                 nfs4_name_maxsz)
 193 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 194                                 2 * nfs4_name_maxsz)
 195 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 196 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 197                                 nfs4_name_maxsz)
 198 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 199 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 200                                  7 + \
 201                                  1 + encode_stateid_maxsz + 8)
 202 #define decode_lock_denied_maxsz \
 203                                 (8 + decode_lockowner_maxsz)
 204 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 205                                  decode_lock_denied_maxsz)
 206 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 207 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 208                                  decode_lock_denied_maxsz)
 209 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 210                                  encode_stateid_maxsz + \
 211                                  4)
 212 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 213                                  decode_stateid_maxsz)
 214 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 215 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 216 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 217                                 1 + nfs4_name_maxsz + \
 218                                 1 + \
 219                                 nfs4_fattr_maxsz)
 220 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 221 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 222                                 1 + 2 + nfs4_name_maxsz + \
 223                                 encode_attrs_maxsz)
 224 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 225                                 decode_change_info_maxsz + \
 226                                 nfs4_fattr_bitmap_maxsz)
 227 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 228 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 229 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 230 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 231 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 232 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 233                                  nfs4_fattr_bitmap_maxsz + 1)
 234 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 235                                  encode_stateid_maxsz + 3)
 236 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 237 #define encode_fs_locations_maxsz \
 238                                 (encode_getattr_maxsz)
 239 #define decode_fs_locations_maxsz \
 240                                 (0)
 241 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 242 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 243 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 244                                 encode_putfh_maxsz + \
 245                                 encode_read_maxsz)
 246 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 247                                 decode_putfh_maxsz + \
 248                                 decode_read_maxsz)
 249 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 250                                 encode_putfh_maxsz + \
 251                                 encode_readlink_maxsz)
 252 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 253                                 decode_putfh_maxsz + \
 254                                 decode_readlink_maxsz)
 255 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 256                                 encode_putfh_maxsz + \
 257                                 encode_readdir_maxsz)
 258 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 259                                 decode_putfh_maxsz + \
 260                                 decode_readdir_maxsz)
 261 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 262                                 encode_putfh_maxsz + \
 263                                 encode_write_maxsz + \
 264                                 encode_getattr_maxsz)
 265 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 266                                 decode_putfh_maxsz + \
 267                                 decode_write_maxsz + \
 268                                 decode_getattr_maxsz)
 269 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 270                                 encode_putfh_maxsz + \
 271                                 encode_commit_maxsz + \
 272                                 encode_getattr_maxsz)
 273 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 274                                 decode_putfh_maxsz + \
 275                                 decode_commit_maxsz + \
 276                                 decode_getattr_maxsz)
 277 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 278                                 encode_putfh_maxsz + \
 279                                 encode_savefh_maxsz + \
 280                                 encode_open_maxsz + \
 281                                 encode_getfh_maxsz + \
 282                                 encode_getattr_maxsz + \
 283                                 encode_restorefh_maxsz + \
 284                                 encode_getattr_maxsz)
 285 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 286                                 decode_putfh_maxsz + \
 287                                 decode_savefh_maxsz + \
 288                                 decode_open_maxsz + \
 289                                 decode_getfh_maxsz + \
 290                                 decode_getattr_maxsz + \
 291                                 decode_restorefh_maxsz + \
 292                                 decode_getattr_maxsz)
 293 #define NFS4_enc_open_confirm_sz \
 294                                 (compound_encode_hdr_maxsz + \
 295                                  encode_putfh_maxsz + \
 296                                  encode_open_confirm_maxsz)
 297 #define NFS4_dec_open_confirm_sz \
 298                                 (compound_decode_hdr_maxsz + \
 299                                  decode_putfh_maxsz + \
 300                                  decode_open_confirm_maxsz)
 301 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 302                                         encode_putfh_maxsz + \
 303                                         encode_open_maxsz + \
 304                                         encode_getattr_maxsz)
 305 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 306                                         decode_putfh_maxsz + \
 307                                         decode_open_maxsz + \
 308                                         decode_getattr_maxsz)
 309 #define NFS4_enc_open_downgrade_sz \
 310                                 (compound_encode_hdr_maxsz + \
 311                                  encode_putfh_maxsz + \
 312                                  encode_open_downgrade_maxsz + \
 313                                  encode_getattr_maxsz)
 314 #define NFS4_dec_open_downgrade_sz \
 315                                 (compound_decode_hdr_maxsz + \
 316                                  decode_putfh_maxsz + \
 317                                  decode_open_downgrade_maxsz + \
 318                                  decode_getattr_maxsz)
 319 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 320                                  encode_putfh_maxsz + \
 321                                  encode_close_maxsz + \
 322                                  encode_getattr_maxsz)
 323 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 324                                  decode_putfh_maxsz + \
 325                                  decode_close_maxsz + \
 326                                  decode_getattr_maxsz)
 327 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 328                                  encode_putfh_maxsz + \
 329                                  encode_setattr_maxsz + \
 330                                  encode_getattr_maxsz)
 331 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 332                                  decode_putfh_maxsz + \
 333                                  decode_setattr_maxsz + \
 334                                  decode_getattr_maxsz)
 335 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_fsinfo_maxsz)
 338 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 339                                 decode_putfh_maxsz + \
 340                                 decode_fsinfo_maxsz)
 341 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 342                                 encode_renew_maxsz)
 343 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 344                                 decode_renew_maxsz)
 345 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 346                                 encode_setclientid_maxsz)
 347 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 348                                 decode_setclientid_maxsz)
 349 #define NFS4_enc_setclientid_confirm_sz \
 350                                 (compound_encode_hdr_maxsz + \
 351                                 encode_setclientid_confirm_maxsz + \
 352                                 encode_putrootfh_maxsz + \
 353                                 encode_fsinfo_maxsz)
 354 #define NFS4_dec_setclientid_confirm_sz \
 355                                 (compound_decode_hdr_maxsz + \
 356                                 decode_setclientid_confirm_maxsz + \
 357                                 decode_putrootfh_maxsz + \
 358                                 decode_fsinfo_maxsz)
 359 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 360                                 encode_putfh_maxsz + \
 361                                 encode_lock_maxsz)
 362 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 363                                 decode_putfh_maxsz + \
 364                                 decode_lock_maxsz)
 365 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_lockt_maxsz)
 368 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 369                                  decode_putfh_maxsz + \
 370                                  decode_lockt_maxsz)
 371 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 372                                 encode_putfh_maxsz + \
 373                                 encode_locku_maxsz)
 374 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_locku_maxsz)
 377 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 378                                 encode_putfh_maxsz + \
 379                                 encode_access_maxsz)
 380 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 381                                 decode_putfh_maxsz + \
 382                                 decode_access_maxsz)
 383 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 384                                 encode_putfh_maxsz + \
 385                                 encode_getattr_maxsz)
 386 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 decode_getattr_maxsz)
 389 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 390                                 encode_putfh_maxsz + \
 391                                 encode_lookup_maxsz + \
 392                                 encode_getattr_maxsz + \
 393                                 encode_getfh_maxsz)
 394 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 395                                 decode_putfh_maxsz + \
 396                                 decode_lookup_maxsz + \
 397                                 decode_getattr_maxsz + \
 398                                 decode_getfh_maxsz)
 399 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 400                                 encode_putrootfh_maxsz + \
 401                                 encode_getattr_maxsz + \
 402                                 encode_getfh_maxsz)
 403 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 404                                 decode_putrootfh_maxsz + \
 405                                 decode_getattr_maxsz + \
 406                                 decode_getfh_maxsz)
 407 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 408                                 encode_putfh_maxsz + \
 409                                 encode_remove_maxsz + \
 410                                 encode_getattr_maxsz)
 411 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 412                                 decode_putfh_maxsz + \
 413                                 op_decode_hdr_maxsz + 5 + \
 414                                 decode_getattr_maxsz)
 415 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 416                                 encode_putfh_maxsz + \
 417                                 encode_savefh_maxsz + \
 418                                 encode_putfh_maxsz + \
 419                                 encode_rename_maxsz + \
 420                                 encode_getattr_maxsz + \
 421                                 encode_restorefh_maxsz + \
 422                                 encode_getattr_maxsz)
 423 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 424                                 decode_putfh_maxsz + \
 425                                 decode_savefh_maxsz + \
 426                                 decode_putfh_maxsz + \
 427                                 decode_rename_maxsz + \
 428                                 decode_getattr_maxsz + \
 429                                 decode_restorefh_maxsz + \
 430                                 decode_getattr_maxsz)
 431 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 432                                 encode_putfh_maxsz + \
 433                                 encode_savefh_maxsz + \
 434                                 encode_putfh_maxsz + \
 435                                 encode_link_maxsz + \
 436                                 decode_getattr_maxsz + \
 437                                 encode_restorefh_maxsz + \
 438                                 decode_getattr_maxsz)
 439 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 440                                 decode_putfh_maxsz + \
 441                                 decode_savefh_maxsz + \
 442                                 decode_putfh_maxsz + \
 443                                 decode_link_maxsz + \
 444                                 decode_getattr_maxsz + \
 445                                 decode_restorefh_maxsz + \
 446                                 decode_getattr_maxsz)
 447 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_symlink_maxsz + \
 450                                 encode_getattr_maxsz + \
 451                                 encode_getfh_maxsz)
 452 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 453                                 decode_putfh_maxsz + \
 454                                 decode_symlink_maxsz + \
 455                                 decode_getattr_maxsz + \
 456                                 decode_getfh_maxsz)
 457 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_savefh_maxsz + \
 460                                 encode_create_maxsz + \
 461                                 encode_getfh_maxsz + \
 462                                 encode_getattr_maxsz + \
 463                                 encode_restorefh_maxsz + \
 464                                 encode_getattr_maxsz)
 465 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 466                                 decode_putfh_maxsz + \
 467                                 decode_savefh_maxsz + \
 468                                 decode_create_maxsz + \
 469                                 decode_getfh_maxsz + \
 470                                 decode_getattr_maxsz + \
 471                                 decode_restorefh_maxsz + \
 472                                 decode_getattr_maxsz)
 473 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_getattr_maxsz)
 476 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 477                                 decode_putfh_maxsz + \
 478                                 decode_getattr_maxsz)
 479 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 480                                 encode_putfh_maxsz + \
 481                                 encode_statfs_maxsz)
 482 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 483                                 decode_putfh_maxsz + \
 484                                 decode_statfs_maxsz)
 485 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 486                                 encode_putfh_maxsz + \
 487                                 encode_getattr_maxsz)
 488 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 489                                 decode_putfh_maxsz + \
 490                                 decode_getattr_maxsz)
 491 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_delegreturn_maxsz + \
 494                                 encode_getattr_maxsz)
 495 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 496                                 decode_delegreturn_maxsz + \
 497                                 decode_getattr_maxsz)
 498 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 499                                 encode_putfh_maxsz + \
 500                                 encode_getacl_maxsz)
 501 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 502                                 decode_putfh_maxsz + \
 503                                 decode_getacl_maxsz)
 504 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 505                                 encode_putfh_maxsz + \
 506                                 encode_setacl_maxsz)
 507 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 508                                 decode_putfh_maxsz + \
 509                                 decode_setacl_maxsz)
 510 #define NFS4_enc_fs_locations_sz \
 511                                 (compound_encode_hdr_maxsz + \
 512                                  encode_putfh_maxsz + \
 513                                  encode_lookup_maxsz + \
 514                                  encode_fs_locations_maxsz)
 515 #define NFS4_dec_fs_locations_sz \
 516                                 (compound_decode_hdr_maxsz + \
 517                                  decode_putfh_maxsz + \
 518                                  decode_lookup_maxsz + \
 519                                  decode_fs_locations_maxsz)
 520
 521 static struct {
 522         unsigned int    mode;
 523         unsigned int    nfs2type;
 524 } nfs_type2fmt[] = {
 525         { 0,            NFNON        },
 526         { S_IFREG,      NFREG        },
 527         { S_IFDIR,      NFDIR        },
 528         { S_IFBLK,      NFBLK        },
 529         { S_IFCHR,      NFCHR        },
 530         { S_IFLNK,      NFLNK        },
 531         { S_IFSOCK,     NFSOCK       },
 532         { S_IFIFO,      NFFIFO       },
 533         { 0,            NFNON        },
 534         { 0,            NFNON        },
 535 };
 536
 537 struct compound_hdr {
 538         int32_t         status;
 539         uint32_t        nops;
 540         uint32_t        taglen;
 541         char *          tag;
 542 };
 543
 544 /*
 545  * START OF "GENERIC" ENCODE ROUTINES.
 546  *   These may look a little ugly since they are imported from a "generic"
 547  * set of XDR encode/decode routines which are intended to be shared by
 548  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 549  *
 550  * If the pain of reading these is too great, it should be a straightforward
 551  * task to translate them into Linux-specific versions which are more
 552  * consistent with the style used in NFSv2/v3...
 553  */
 554 #define WRITE32(n)               *p++ = htonl(n)
 555 #define WRITE64(n)               do {                           \
 556         *p++ = htonl((uint32_t)((n) >> 32));                            \
 557         *p++ = htonl((uint32_t)(n));                                    \
 558 } while (0)
 559 #define WRITEMEM(ptr,nbytes)     do {                           \
 560         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 561 } while (0)
 562
 563 #define RESERVE_SPACE(nbytes)   do {                            \
 564         p = xdr_reserve_space(xdr, nbytes);                     \
 565         BUG_ON(!p);                                             \
 566 } while (0)
 567
 568 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 569 {
 570         __be32 *p;
 571
 572         p = xdr_reserve_space(xdr, 4 + len);
 573         BUG_ON(p == NULL);
 574         xdr_encode_opaque(p, str, len);
 575 }
 576
 577 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 578 {
 579         __be32 *p;
 580
 581         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 582         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 583         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 584         WRITE32(hdr->taglen);
 585         WRITEMEM(hdr->tag, hdr->taglen);
 586         WRITE32(NFS4_MINOR_VERSION);
 587         WRITE32(hdr->nops);
 588         return 0;
 589 }
 590
 591 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 592 {
 593         __be32 *p;
 594
 595         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 596         BUG_ON(p == NULL);
 597         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 598 }
 599
 600 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 601 {
 602         char owner_name[IDMAP_NAMESZ];
 603         char owner_group[IDMAP_NAMESZ];
 604         int owner_namelen = 0;
 605         int owner_grouplen = 0;
 606         __be32 *p;
 607         __be32 *q;
 608         int len;
 609         uint32_t bmval0 = 0;
 610         uint32_t bmval1 = 0;
 611         int status;
 612
 613         /*
 614          * We reserve enough space to write the entire attribute buffer at once.
 615          * In the worst-case, this would be
 616          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 617          *          = 36 bytes, plus any contribution from variable-length fields
 618          *            such as owner/group.
 619          */
 620         len = 16;
 621
 622         /* Sigh */
 623         if (iap->ia_valid & ATTR_SIZE)
 624                 len += 8;
 625         if (iap->ia_valid & ATTR_MODE)
 626                 len += 4;
 627         if (iap->ia_valid & ATTR_UID) {
 628                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 629                 if (owner_namelen < 0) {
 630                         dprintk("nfs: couldn't resolve uid %d to string\n",
 631                                         iap->ia_uid);
 632                         /* XXX */
 633                         strcpy(owner_name, "nobody");
 634                         owner_namelen = sizeof("nobody") - 1;
 635                         /* goto out; */
 636                 }
 637                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 638         }
 639         if (iap->ia_valid & ATTR_GID) {
 640                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 641                 if (owner_grouplen < 0) {
 642                         dprintk("nfs: couldn't resolve gid %d to string\n",
 643                                         iap->ia_gid);
 644                         strcpy(owner_group, "nobody");
 645                         owner_grouplen = sizeof("nobody") - 1;
 646                         /* goto out; */
 647                 }
 648                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 649         }
 650         if (iap->ia_valid & ATTR_ATIME_SET)
 651                 len += 16;
 652         else if (iap->ia_valid & ATTR_ATIME)
 653                 len += 4;
 654         if (iap->ia_valid & ATTR_MTIME_SET)
 655                 len += 16;
 656         else if (iap->ia_valid & ATTR_MTIME)
 657                 len += 4;
 658         RESERVE_SPACE(len);
 659
 660         /*
 661          * We write the bitmap length now, but leave the bitmap and the attribute
 662          * buffer length to be backfilled at the end of this routine.
 663          */
 664         WRITE32(2);
 665         q = p;
 666         p += 3;
 667
 668         if (iap->ia_valid & ATTR_SIZE) {
 669                 bmval0 |= FATTR4_WORD0_SIZE;
 670                 WRITE64(iap->ia_size);
 671         }
 672         if (iap->ia_valid & ATTR_MODE) {
 673                 bmval1 |= FATTR4_WORD1_MODE;
 674                 WRITE32(iap->ia_mode & S_IALLUGO);
 675         }
 676         if (iap->ia_valid & ATTR_UID) {
 677                 bmval1 |= FATTR4_WORD1_OWNER;
 678                 WRITE32(owner_namelen);
 679                 WRITEMEM(owner_name, owner_namelen);
 680         }
 681         if (iap->ia_valid & ATTR_GID) {
 682                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 683                 WRITE32(owner_grouplen);
 684                 WRITEMEM(owner_group, owner_grouplen);
 685         }
 686         if (iap->ia_valid & ATTR_ATIME_SET) {
 687                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 688                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 689                 WRITE32(0);
 690                 WRITE32(iap->ia_mtime.tv_sec);
 691                 WRITE32(iap->ia_mtime.tv_nsec);
 692         }
 693         else if (iap->ia_valid & ATTR_ATIME) {
 694                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 695                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 696         }
 697         if (iap->ia_valid & ATTR_MTIME_SET) {
 698                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 699                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 700                 WRITE32(0);
 701                 WRITE32(iap->ia_mtime.tv_sec);
 702                 WRITE32(iap->ia_mtime.tv_nsec);
 703         }
 704         else if (iap->ia_valid & ATTR_MTIME) {
 705                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 706                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 707         }
 708
 709         /*
 710          * Now we backfill the bitmap and the attribute buffer length.
 711          */
 712         if (len != ((char *)p - (char *)q) + 4) {
 713                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 714                                 len, ((char *)p - (char *)q) + 4);
 715                 BUG();
 716         }
 717         len = (char *)p - (char *)q - 12;
 718         *q++ = htonl(bmval0);
 719         *q++ = htonl(bmval1);
 720         *q++ = htonl(len);
 721
 722         status = 0;
 723 /* out: */
 724         return status;
 725 }
 726
 727 static int encode_access(struct xdr_stream *xdr, u32 access)
 728 {
 729         __be32 *p;
 730
 731         RESERVE_SPACE(8);
 732         WRITE32(OP_ACCESS);
 733         WRITE32(access);
 734
 735         return 0;
 736 }
 737
 738 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 739 {
 740         __be32 *p;
 741
 742         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 743         WRITE32(OP_CLOSE);
 744         WRITE32(arg->seqid->sequence->counter);
 745         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 746
 747         return 0;
 748 }
 749
 750 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 751 {
 752         __be32 *p;
 753
 754         RESERVE_SPACE(16);
 755         WRITE32(OP_COMMIT);
 756         WRITE64(args->offset);
 757         WRITE32(args->count);
 758
 759         return 0;
 760 }
 761
 762 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 763 {
 764         __be32 *p;
 765
 766         RESERVE_SPACE(8);
 767         WRITE32(OP_CREATE);
 768         WRITE32(create->ftype);
 769
 770         switch (create->ftype) {
 771         case NF4LNK:
 772                 RESERVE_SPACE(4);
 773                 WRITE32(create->u.symlink.len);
 774                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 775                 break;
 776
 777         case NF4BLK: case NF4CHR:
 778                 RESERVE_SPACE(8);
 779                 WRITE32(create->u.device.specdata1);
 780                 WRITE32(create->u.device.specdata2);
 781                 break;
 782
 783         default:
 784                 break;
 785         }
 786
 787         RESERVE_SPACE(4 + create->name->len);
 788         WRITE32(create->name->len);
 789         WRITEMEM(create->name->name, create->name->len);
 790
 791         return encode_attrs(xdr, create->attrs, create->server);
 792 }
 793
 794 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 795 {
 796         __be32 *p;
 797
 798         RESERVE_SPACE(12);
 799         WRITE32(OP_GETATTR);
 800         WRITE32(1);
 801         WRITE32(bitmap);
 802         return 0;
 803 }
 804
 805 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 806 {
 807         __be32 *p;
 808
 809         RESERVE_SPACE(16);
 810         WRITE32(OP_GETATTR);
 811         WRITE32(2);
 812         WRITE32(bm0);
 813         WRITE32(bm1);
 814         return 0;
 815 }
 816
 817 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 818 {
 819         return encode_getattr_two(xdr,
 820                         bitmask[0] & nfs4_fattr_bitmap[0],
 821                         bitmask[1] & nfs4_fattr_bitmap[1]);
 822 }
 823
 824 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 825 {
 826         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 827                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 828 }
 829
 830 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 831 {
 832         return encode_getattr_two(xdr,
 833                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 834                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 835 }
 836
 837 static int encode_getfh(struct xdr_stream *xdr)
 838 {
 839         __be32 *p;
 840
 841         RESERVE_SPACE(4);
 842         WRITE32(OP_GETFH);
 843
 844         return 0;
 845 }
 846
 847 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 848 {
 849         __be32 *p;
 850
 851         RESERVE_SPACE(8 + name->len);
 852         WRITE32(OP_LINK);
 853         WRITE32(name->len);
 854         WRITEMEM(name->name, name->len);
 855
 856         return 0;
 857 }
 858
 859 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 860 {
 861         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 862                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 863         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 864 }
 865
 866 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 867 {
 868         if (fl->fl_end == OFFSET_MAX)
 869                 return ~(uint64_t)0;
 870         return fl->fl_end - fl->fl_start + 1;
 871 }
 872
 873 /*
 874  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 875  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 876  */
 877 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 878 {
 879         __be32 *p;
 880
 881         RESERVE_SPACE(32);
 882         WRITE32(OP_LOCK);
 883         WRITE32(nfs4_lock_type(args->fl, args->block));
 884         WRITE32(args->reclaim);
 885         WRITE64(args->fl->fl_start);
 886         WRITE64(nfs4_lock_length(args->fl));
 887         WRITE32(args->new_lock_owner);
 888         if (args->new_lock_owner){
 889                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 890                 WRITE32(args->open_seqid->sequence->counter);
 891                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 892                 WRITE32(args->lock_seqid->sequence->counter);
 893                 WRITE64(args->lock_owner.clientid);
 894                 WRITE32(16);
 895                 WRITEMEM("lock id:", 8);
 896                 WRITE64(args->lock_owner.id);
 897         }
 898         else {
 899                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 900                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 901                 WRITE32(args->lock_seqid->sequence->counter);
 902         }
 903
 904         return 0;
 905 }
 906
 907 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 908 {
 909         __be32 *p;
 910
 911         RESERVE_SPACE(52);
 912         WRITE32(OP_LOCKT);
 913         WRITE32(nfs4_lock_type(args->fl, 0));
 914         WRITE64(args->fl->fl_start);
 915         WRITE64(nfs4_lock_length(args->fl));
 916         WRITE64(args->lock_owner.clientid);
 917         WRITE32(16);
 918         WRITEMEM("lock id:", 8);
 919         WRITE64(args->lock_owner.id);
 920
 921         return 0;
 922 }
 923
 924 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 925 {
 926         __be32 *p;
 927
 928         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 929         WRITE32(OP_LOCKU);
 930         WRITE32(nfs4_lock_type(args->fl, 0));
 931         WRITE32(args->seqid->sequence->counter);
 932         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 933         WRITE64(args->fl->fl_start);
 934         WRITE64(nfs4_lock_length(args->fl));
 935
 936         return 0;
 937 }
 938
 939 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 940 {
 941         int len = name->len;
 942         __be32 *p;
 943
 944         RESERVE_SPACE(8 + len);
 945         WRITE32(OP_LOOKUP);
 946         WRITE32(len);
 947         WRITEMEM(name->name, len);
 948
 949         return 0;
 950 }
 951
 952 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 953 {
 954         __be32 *p;
 955
 956         RESERVE_SPACE(8);
 957         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 958                 case FMODE_READ:
 959                         WRITE32(NFS4_SHARE_ACCESS_READ);
 960                         break;
 961                 case FMODE_WRITE:
 962                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 963                         break;
 964                 case FMODE_READ|FMODE_WRITE:
 965                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 966                         break;
 967                 default:
 968                         BUG();
 969         }
 970         WRITE32(0);             /* for linux, share_deny = 0 always */
 971 }
 972
 973 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 974 {
 975         __be32 *p;
 976  /*
 977  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 978  * owner 4 = 32
 979  */
 980         RESERVE_SPACE(8);
 981         WRITE32(OP_OPEN);
 982         WRITE32(arg->seqid->sequence->counter);
 983         encode_share_access(xdr, arg->open_flags);
 984         RESERVE_SPACE(28);
 985         WRITE64(arg->clientid);
 986         WRITE32(16);
 987         WRITEMEM("open id:", 8);
 988         WRITE64(arg->id);
 989 }
 990
 991 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 992 {
 993         __be32 *p;
 994
 995         RESERVE_SPACE(4);
 996         switch(arg->open_flags & O_EXCL) {
 997                 case 0:
 998                         WRITE32(NFS4_CREATE_UNCHECKED);
 999                         encode_attrs(xdr, arg->u.attrs, arg->server);
1000                         break;
1001                 default:
1002                         WRITE32(NFS4_CREATE_EXCLUSIVE);
1003                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1004         }
1005 }
1006
1007 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1008 {
1009         __be32 *p;
1010
1011         RESERVE_SPACE(4);
1012         switch (arg->open_flags & O_CREAT) {
1013                 case 0:
1014                         WRITE32(NFS4_OPEN_NOCREATE);
1015                         break;
1016                 default:
1017                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1018                         WRITE32(NFS4_OPEN_CREATE);
1019                         encode_createmode(xdr, arg);
1020         }
1021 }
1022
1023 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
1024 {
1025         __be32 *p;
1026
1027         RESERVE_SPACE(4);
1028         switch (delegation_type) {
1029                 case 0:
1030                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
1031                         break;
1032                 case FMODE_READ:
1033                         WRITE32(NFS4_OPEN_DELEGATE_READ);
1034                         break;
1035                 case FMODE_WRITE|FMODE_READ:
1036                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1037                         break;
1038                 default:
1039                         BUG();
1040         }
1041 }
1042
1043 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1044 {
1045         __be32 *p;
1046
1047         RESERVE_SPACE(4);
1048         WRITE32(NFS4_OPEN_CLAIM_NULL);
1049         encode_string(xdr, name->len, name->name);
1050 }
1051
1052 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
1053 {
1054         __be32 *p;
1055
1056         RESERVE_SPACE(4);
1057         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1058         encode_delegation_type(xdr, type);
1059 }
1060
1061 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1062 {
1063         __be32 *p;
1064
1065         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1066         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1067         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1068         encode_string(xdr, name->len, name->name);
1069 }
1070
1071 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1072 {
1073         encode_openhdr(xdr, arg);
1074         encode_opentype(xdr, arg);
1075         switch (arg->claim) {
1076                 case NFS4_OPEN_CLAIM_NULL:
1077                         encode_claim_null(xdr, arg->name);
1078                         break;
1079                 case NFS4_OPEN_CLAIM_PREVIOUS:
1080                         encode_claim_previous(xdr, arg->u.delegation_type);
1081                         break;
1082                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1083                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1084                         break;
1085                 default:
1086                         BUG();
1087         }
1088         return 0;
1089 }
1090
1091 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1092 {
1093         __be32 *p;
1094
1095         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1096         WRITE32(OP_OPEN_CONFIRM);
1097         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1098         WRITE32(arg->seqid->sequence->counter);
1099
1100         return 0;
1101 }
1102
1103 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1104 {
1105         __be32 *p;
1106
1107         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1108         WRITE32(OP_OPEN_DOWNGRADE);
1109         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1110         WRITE32(arg->seqid->sequence->counter);
1111         encode_share_access(xdr, arg->open_flags);
1112         return 0;
1113 }
1114
1115 static int
1116 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1117 {
1118         int len = fh->size;
1119         __be32 *p;
1120
1121         RESERVE_SPACE(8 + len);
1122         WRITE32(OP_PUTFH);
1123         WRITE32(len);
1124         WRITEMEM(fh->data, len);
1125
1126         return 0;
1127 }
1128
1129 static int encode_putrootfh(struct xdr_stream *xdr)
1130 {
1131         __be32 *p;
1132
1133         RESERVE_SPACE(4);
1134         WRITE32(OP_PUTROOTFH);
1135
1136         return 0;
1137 }
1138
1139 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1140 {
1141         nfs4_stateid stateid;
1142         __be32 *p;
1143
1144         RESERVE_SPACE(NFS4_STATEID_SIZE);
1145         if (ctx->state != NULL) {
1146                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1147                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1148         } else
1149                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1150 }
1151
1152 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1153 {
1154         __be32 *p;
1155
1156         RESERVE_SPACE(4);
1157         WRITE32(OP_READ);
1158
1159         encode_stateid(xdr, args->context);
1160
1161         RESERVE_SPACE(12);
1162         WRITE64(args->offset);
1163         WRITE32(args->count);
1164
1165         return 0;
1166 }
1167
1168 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1169 {
1170         uint32_t attrs[2] = {
1171                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1172                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1173         };
1174         __be32 *p;
1175
1176         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1177         WRITE32(OP_READDIR);
1178         WRITE64(readdir->cookie);
1179         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1180         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1181         WRITE32(readdir->count);
1182         WRITE32(2);
1183         /* Switch to mounted_on_fileid if the server supports it */
1184         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1185                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1186         else
1187                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1188         WRITE32(attrs[0] & readdir->bitmask[0]);
1189         WRITE32(attrs[1] & readdir->bitmask[1]);
1190         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1191                         __FUNCTION__,
1192                         (unsigned long long)readdir->cookie,
1193                         ((u32 *)readdir->verifier.data)[0],
1194                         ((u32 *)readdir->verifier.data)[1],
1195                         attrs[0] & readdir->bitmask[0],
1196                         attrs[1] & readdir->bitmask[1]);
1197
1198         return 0;
1199 }
1200
1201 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1202 {
1203         __be32 *p;
1204
1205         RESERVE_SPACE(4);
1206         WRITE32(OP_READLINK);
1207
1208         return 0;
1209 }
1210
1211 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1212 {
1213         __be32 *p;
1214
1215         RESERVE_SPACE(8 + name->len);
1216         WRITE32(OP_REMOVE);
1217         WRITE32(name->len);
1218         WRITEMEM(name->name, name->len);
1219
1220         return 0;
1221 }
1222
1223 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1224 {
1225         __be32 *p;
1226
1227         RESERVE_SPACE(8 + oldname->len);
1228         WRITE32(OP_RENAME);
1229         WRITE32(oldname->len);
1230         WRITEMEM(oldname->name, oldname->len);
1231
1232         RESERVE_SPACE(4 + newname->len);
1233         WRITE32(newname->len);
1234         WRITEMEM(newname->name, newname->len);
1235
1236         return 0;
1237 }
1238
1239 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1240 {
1241         __be32 *p;
1242
1243         RESERVE_SPACE(12);
1244         WRITE32(OP_RENEW);
1245         WRITE64(client_stateid->cl_clientid);
1246
1247         return 0;
1248 }
1249
1250 static int
1251 encode_restorefh(struct xdr_stream *xdr)
1252 {
1253         __be32 *p;
1254
1255         RESERVE_SPACE(4);
1256         WRITE32(OP_RESTOREFH);
1257
1258         return 0;
1259 }
1260
1261 static int
1262 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1263 {
1264         __be32 *p;
1265
1266         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1267         WRITE32(OP_SETATTR);
1268         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1269         RESERVE_SPACE(2*4);
1270         WRITE32(1);
1271         WRITE32(FATTR4_WORD0_ACL);
1272         if (arg->acl_len % 4)
1273                 return -EINVAL;
1274         RESERVE_SPACE(4);
1275         WRITE32(arg->acl_len);
1276         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1277         return 0;
1278 }
1279
1280 static int
1281 encode_savefh(struct xdr_stream *xdr)
1282 {
1283         __be32 *p;
1284
1285         RESERVE_SPACE(4);
1286         WRITE32(OP_SAVEFH);
1287
1288         return 0;
1289 }
1290
1291 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1292 {
1293         int status;
1294         __be32 *p;
1295
1296         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1297         WRITE32(OP_SETATTR);
1298         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1299
1300         if ((status = encode_attrs(xdr, arg->iap, server)))
1301                 return status;
1302
1303         return 0;
1304 }
1305
1306 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1307 {
1308         __be32 *p;
1309
1310         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1311         WRITE32(OP_SETCLIENTID);
1312         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1313
1314         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1315         RESERVE_SPACE(4);
1316         WRITE32(setclientid->sc_prog);
1317         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1318         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1319         RESERVE_SPACE(4);
1320         WRITE32(setclientid->sc_cb_ident);
1321
1322         return 0;
1323 }
1324
1325 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1326 {
1327         __be32 *p;
1328
1329         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1330         WRITE32(OP_SETCLIENTID_CONFIRM);
1331         WRITE64(client_state->cl_clientid);
1332         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1333
1334         return 0;
1335 }
1336
1337 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1338 {
1339         __be32 *p;
1340
1341         RESERVE_SPACE(4);
1342         WRITE32(OP_WRITE);
1343
1344         encode_stateid(xdr, args->context);
1345
1346         RESERVE_SPACE(16);
1347         WRITE64(args->offset);
1348         WRITE32(args->stable);
1349         WRITE32(args->count);
1350
1351         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1352
1353         return 0;
1354 }
1355
1356 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1357 {
1358         __be32 *p;
1359
1360         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1361
1362         WRITE32(OP_DELEGRETURN);
1363         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1364         return 0;
1365
1366 }
1367 /*
1368  * END OF "GENERIC" ENCODE ROUTINES.
1369  */
1370
1371 /*
1372  * Encode an ACCESS request
1373  */
1374 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1375 {
1376         struct xdr_stream xdr;
1377         struct compound_hdr hdr = {
1378                 .nops = 2,
1379         };
1380         int status;
1381
1382         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1383         encode_compound_hdr(&xdr, &hdr);
1384         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1385                 status = encode_access(&xdr, args->access);
1386         return status;
1387 }
1388
1389 /*
1390  * Encode LOOKUP request
1391  */
1392 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1393 {
1394         struct xdr_stream xdr;
1395         struct compound_hdr hdr = {
1396                 .nops = 4,
1397         };
1398         int status;
1399
1400         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1401         encode_compound_hdr(&xdr, &hdr);
1402         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1403                 goto out;
1404         if ((status = encode_lookup(&xdr, args->name)) != 0)
1405                 goto out;
1406         if ((status = encode_getfh(&xdr)) != 0)
1407                 goto out;
1408         status = encode_getfattr(&xdr, args->bitmask);
1409 out:
1410         return status;
1411 }
1412
1413 /*
1414  * Encode LOOKUP_ROOT request
1415  */
1416 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1417 {
1418         struct xdr_stream xdr;
1419         struct compound_hdr hdr = {
1420                 .nops = 3,
1421         };
1422         int status;
1423
1424         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1425         encode_compound_hdr(&xdr, &hdr);
1426         if ((status = encode_putrootfh(&xdr)) != 0)
1427                 goto out;
1428         if ((status = encode_getfh(&xdr)) == 0)
1429                 status = encode_getfattr(&xdr, args->bitmask);
1430 out:
1431         return status;
1432 }
1433
1434 /*
1435  * Encode REMOVE request
1436  */
1437 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1438 {
1439         struct xdr_stream xdr;
1440         struct compound_hdr hdr = {
1441                 .nops = 3,
1442         };
1443         int status;
1444
1445         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1446         encode_compound_hdr(&xdr, &hdr);
1447         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1448                 goto out;
1449         if ((status = encode_remove(&xdr, &args->name)) != 0)
1450                 goto out;
1451         status = encode_getfattr(&xdr, args->bitmask);
1452 out:
1453         return status;
1454 }
1455
1456 /*
1457  * Encode RENAME request
1458  */
1459 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1460 {
1461         struct xdr_stream xdr;
1462         struct compound_hdr hdr = {
1463                 .nops = 7,
1464         };
1465         int status;
1466
1467         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1468         encode_compound_hdr(&xdr, &hdr);
1469         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1470                 goto out;
1471         if ((status = encode_savefh(&xdr)) != 0)
1472                 goto out;
1473         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1474                 goto out;
1475         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1476                 goto out;
1477         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1478                 goto out;
1479         if ((status = encode_restorefh(&xdr)) != 0)
1480                 goto out;
1481         status = encode_getfattr(&xdr, args->bitmask);
1482 out:
1483         return status;
1484 }
1485
1486 /*
1487  * Encode LINK request
1488  */
1489 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1490 {
1491         struct xdr_stream xdr;
1492         struct compound_hdr hdr = {
1493                 .nops = 7,
1494         };
1495         int status;
1496
1497         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1498         encode_compound_hdr(&xdr, &hdr);
1499         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1500                 goto out;
1501         if ((status = encode_savefh(&xdr)) != 0)
1502                 goto out;
1503         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1504                 goto out;
1505         if ((status = encode_link(&xdr, args->name)) != 0)
1506                 goto out;
1507         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1508                 goto out;
1509         if ((status = encode_restorefh(&xdr)) != 0)
1510                 goto out;
1511         status = encode_getfattr(&xdr, args->bitmask);
1512 out:
1513         return status;
1514 }
1515
1516 /*
1517  * Encode CREATE request
1518  */
1519 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1520 {
1521         struct xdr_stream xdr;
1522         struct compound_hdr hdr = {
1523                 .nops = 7,
1524         };
1525         int status;
1526
1527         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1528         encode_compound_hdr(&xdr, &hdr);
1529         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1530                 goto out;
1531         if ((status = encode_savefh(&xdr)) != 0)
1532                 goto out;
1533         if ((status = encode_create(&xdr, args)) != 0)
1534                 goto out;
1535         if ((status = encode_getfh(&xdr)) != 0)
1536                 goto out;
1537         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1538                 goto out;
1539         if ((status = encode_restorefh(&xdr)) != 0)
1540                 goto out;
1541         status = encode_getfattr(&xdr, args->bitmask);
1542 out:
1543         return status;
1544 }
1545
1546 /*
1547  * Encode SYMLINK request
1548  */
1549 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1550 {
1551         return nfs4_xdr_enc_create(req, p, args);
1552 }
1553
1554 /*
1555  * Encode GETATTR request
1556  */
1557 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1558 {
1559         struct xdr_stream xdr;
1560         struct compound_hdr hdr = {
1561                 .nops = 2,
1562         };
1563         int status;
1564
1565         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1566         encode_compound_hdr(&xdr, &hdr);
1567         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1568                 status = encode_getfattr(&xdr, args->bitmask);
1569         return status;
1570 }
1571
1572 /*
1573  * Encode a CLOSE request
1574  */
1575 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1576 {
1577         struct xdr_stream xdr;
1578         struct compound_hdr hdr = {
1579                 .nops   = 3,
1580         };
1581         int status;
1582
1583         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1584         encode_compound_hdr(&xdr, &hdr);
1585         status = encode_putfh(&xdr, args->fh);
1586         if(status)
1587                 goto out;
1588         status = encode_close(&xdr, args);
1589         if (status != 0)
1590                 goto out;
1591         status = encode_getfattr(&xdr, args->bitmask);
1592 out:
1593         return status;
1594 }
1595
1596 /*
1597  * Encode an OPEN request
1598  */
1599 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1600 {
1601         struct xdr_stream xdr;
1602         struct compound_hdr hdr = {
1603                 .nops = 7,
1604         };
1605         int status;
1606
1607         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1608         encode_compound_hdr(&xdr, &hdr);
1609         status = encode_putfh(&xdr, args->fh);
1610         if (status)
1611                 goto out;
1612         status = encode_savefh(&xdr);
1613         if (status)
1614                 goto out;
1615         status = encode_open(&xdr, args);
1616         if (status)
1617                 goto out;
1618         status = encode_getfh(&xdr);
1619         if (status)
1620                 goto out;
1621         status = encode_getfattr(&xdr, args->bitmask);
1622         if (status)
1623                 goto out;
1624         status = encode_restorefh(&xdr);
1625         if (status)
1626                 goto out;
1627         status = encode_getfattr(&xdr, args->bitmask);
1628 out:
1629         return status;
1630 }
1631
1632 /*
1633  * Encode an OPEN_CONFIRM request
1634  */
1635 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1636 {
1637         struct xdr_stream xdr;
1638         struct compound_hdr hdr = {
1639                 .nops   = 2,
1640         };
1641         int status;
1642
1643         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1644         encode_compound_hdr(&xdr, &hdr);
1645         status = encode_putfh(&xdr, args->fh);
1646         if(status)
1647                 goto out;
1648         status = encode_open_confirm(&xdr, args);
1649 out:
1650         return status;
1651 }
1652
1653 /*
1654  * Encode an OPEN request with no attributes.
1655  */
1656 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1657 {
1658         struct xdr_stream xdr;
1659         struct compound_hdr hdr = {
1660                 .nops   = 3,
1661         };
1662         int status;
1663
1664         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1665         encode_compound_hdr(&xdr, &hdr);
1666         status = encode_putfh(&xdr, args->fh);
1667         if (status)
1668                 goto out;
1669         status = encode_open(&xdr, args);
1670         if (status)
1671                 goto out;
1672         status = encode_getfattr(&xdr, args->bitmask);
1673 out:
1674         return status;
1675 }
1676
1677 /*
1678  * Encode an OPEN_DOWNGRADE request
1679  */
1680 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1681 {
1682         struct xdr_stream xdr;
1683         struct compound_hdr hdr = {
1684                 .nops   = 3,
1685         };
1686         int status;
1687
1688         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1689         encode_compound_hdr(&xdr, &hdr);
1690         status = encode_putfh(&xdr, args->fh);
1691         if (status)
1692                 goto out;
1693         status = encode_open_downgrade(&xdr, args);
1694         if (status != 0)
1695                 goto out;
1696         status = encode_getfattr(&xdr, args->bitmask);
1697 out:
1698         return status;
1699 }
1700
1701 /*
1702  * Encode a LOCK request
1703  */
1704 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1705 {
1706         struct xdr_stream xdr;
1707         struct compound_hdr hdr = {
1708                 .nops   = 2,
1709         };
1710         int status;
1711
1712         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1713         encode_compound_hdr(&xdr, &hdr);
1714         status = encode_putfh(&xdr, args->fh);
1715         if(status)
1716                 goto out;
1717         status = encode_lock(&xdr, args);
1718 out:
1719         return status;
1720 }
1721
1722 /*
1723  * Encode a LOCKT request
1724  */
1725 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1726 {
1727         struct xdr_stream xdr;
1728         struct compound_hdr hdr = {
1729                 .nops   = 2,
1730         };
1731         int status;
1732
1733         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1734         encode_compound_hdr(&xdr, &hdr);
1735         status = encode_putfh(&xdr, args->fh);
1736         if(status)
1737                 goto out;
1738         status = encode_lockt(&xdr, args);
1739 out:
1740         return status;
1741 }
1742
1743 /*
1744  * Encode a LOCKU request
1745  */
1746 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1747 {
1748         struct xdr_stream xdr;
1749         struct compound_hdr hdr = {
1750                 .nops   = 2,
1751         };
1752         int status;
1753
1754         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1755         encode_compound_hdr(&xdr, &hdr);
1756         status = encode_putfh(&xdr, args->fh);
1757         if(status)
1758                 goto out;
1759         status = encode_locku(&xdr, args);
1760 out:
1761         return status;
1762 }
1763
1764 /*
1765  * Encode a READLINK request
1766  */
1767 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1768 {
1769         struct xdr_stream xdr;
1770         struct compound_hdr hdr = {
1771                 .nops = 2,
1772         };
1773         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1774         unsigned int replen;
1775         int status;
1776
1777         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1778         encode_compound_hdr(&xdr, &hdr);
1779         status = encode_putfh(&xdr, args->fh);
1780         if(status)
1781                 goto out;
1782         status = encode_readlink(&xdr, args, req);
1783
1784         /* set up reply kvec
1785          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1786          *      + OP_READLINK + status + string length = 8
1787          */
1788         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1789         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1790                         args->pgbase, args->pglen);
1791
1792 out:
1793         return status;
1794 }
1795
1796 /*
1797  * Encode a READDIR request
1798  */
1799 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1800 {
1801         struct xdr_stream xdr;
1802         struct compound_hdr hdr = {
1803                 .nops = 2,
1804         };
1805         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1806         int replen;
1807         int status;
1808
1809         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1810         encode_compound_hdr(&xdr, &hdr);
1811         status = encode_putfh(&xdr, args->fh);
1812         if(status)
1813                 goto out;
1814         status = encode_readdir(&xdr, args, req);
1815
1816         /* set up reply kvec
1817          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1818          *      + OP_READDIR + status + verifer(2)  = 9
1819          */
1820         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1821         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1822                          args->pgbase, args->count);
1823         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1824                         __FUNCTION__, replen, args->pages,
1825                         args->pgbase, args->count);
1826
1827 out:
1828         return status;
1829 }
1830
1831 /*
1832  * Encode a READ request
1833  */
1834 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1835 {
1836         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1837         struct xdr_stream xdr;
1838         struct compound_hdr hdr = {
1839                 .nops = 2,
1840         };
1841         int replen, status;
1842
1843         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844         encode_compound_hdr(&xdr, &hdr);
1845         status = encode_putfh(&xdr, args->fh);
1846         if (status)
1847                 goto out;
1848         status = encode_read(&xdr, args);
1849         if (status)
1850                 goto out;
1851
1852         /* set up reply kvec
1853          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1854          *       + OP_READ + status + eof + datalen = 9
1855          */
1856         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1857         xdr_inline_pages(&req->rq_rcv_buf, replen,
1858                          args->pages, args->pgbase, args->count);
1859 out:
1860         return status;
1861 }
1862
1863 /*
1864  * Encode an SETATTR request
1865  */
1866 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1867
1868 {
1869         struct xdr_stream xdr;
1870         struct compound_hdr hdr = {
1871                 .nops   = 3,
1872         };
1873         int status;
1874
1875         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1876         encode_compound_hdr(&xdr, &hdr);
1877         status = encode_putfh(&xdr, args->fh);
1878         if(status)
1879                 goto out;
1880         status = encode_setattr(&xdr, args, args->server);
1881         if(status)
1882                 goto out;
1883         status = encode_getfattr(&xdr, args->bitmask);
1884 out:
1885         return status;
1886 }
1887
1888 /*
1889  * Encode a GETACL request
1890  */
1891 static int
1892 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1893                 struct nfs_getaclargs *args)
1894 {
1895         struct xdr_stream xdr;
1896         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1897         struct compound_hdr hdr = {
1898                 .nops   = 2,
1899         };
1900         int replen, status;
1901
1902         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1903         encode_compound_hdr(&xdr, &hdr);
1904         status = encode_putfh(&xdr, args->fh);
1905         if (status)
1906                 goto out;
1907         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1908         /* set up reply buffer: */
1909         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1910         xdr_inline_pages(&req->rq_rcv_buf, replen,
1911                 args->acl_pages, args->acl_pgbase, args->acl_len);
1912 out:
1913         return status;
1914 }
1915
1916 /*
1917  * Encode a WRITE request
1918  */
1919 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .nops = 3,
1924         };
1925         int status;
1926
1927         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1928         encode_compound_hdr(&xdr, &hdr);
1929         status = encode_putfh(&xdr, args->fh);
1930         if (status)
1931                 goto out;
1932         status = encode_write(&xdr, args);
1933         if (status)
1934                 goto out;
1935         status = encode_getfattr(&xdr, args->bitmask);
1936 out:
1937         return status;
1938 }
1939
1940 /*
1941  *  a COMMIT request
1942  */
1943 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1944 {
1945         struct xdr_stream xdr;
1946         struct compound_hdr hdr = {
1947                 .nops = 3,
1948         };
1949         int status;
1950
1951         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1952         encode_compound_hdr(&xdr, &hdr);
1953         status = encode_putfh(&xdr, args->fh);
1954         if (status)
1955                 goto out;
1956         status = encode_commit(&xdr, args);
1957         if (status)
1958                 goto out;
1959         status = encode_getfattr(&xdr, args->bitmask);
1960 out:
1961         return status;
1962 }
1963
1964 /*
1965  * FSINFO request
1966  */
1967 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1968 {
1969         struct xdr_stream xdr;
1970         struct compound_hdr hdr = {
1971                 .nops   = 2,
1972         };
1973         int status;
1974
1975         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1976         encode_compound_hdr(&xdr, &hdr);
1977         status = encode_putfh(&xdr, args->fh);
1978         if (!status)
1979                 status = encode_fsinfo(&xdr, args->bitmask);
1980         return status;
1981 }
1982
1983 /*
1984  * a PATHCONF request
1985  */
1986 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1987 {
1988         struct xdr_stream xdr;
1989         struct compound_hdr hdr = {
1990                 .nops = 2,
1991         };
1992         int status;
1993
1994         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1995         encode_compound_hdr(&xdr, &hdr);
1996         status = encode_putfh(&xdr, args->fh);
1997         if (!status)
1998                 status = encode_getattr_one(&xdr,
1999                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2000         return status;
2001 }
2002
2003 /*
2004  * a STATFS request
2005  */
2006 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2007 {
2008         struct xdr_stream xdr;
2009         struct compound_hdr hdr = {
2010                 .nops = 2,
2011         };
2012         int status;
2013
2014         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2015         encode_compound_hdr(&xdr, &hdr);
2016         status = encode_putfh(&xdr, args->fh);
2017         if (status == 0)
2018                 status = encode_getattr_two(&xdr,
2019                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2020                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2021         return status;
2022 }
2023
2024 /*
2025  * GETATTR_BITMAP request
2026  */
2027 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2028 {
2029         struct xdr_stream xdr;
2030         struct compound_hdr hdr = {
2031                 .nops = 2,
2032         };
2033         int status;
2034
2035         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2036         encode_compound_hdr(&xdr, &hdr);
2037         status = encode_putfh(&xdr, fhandle);
2038         if (status == 0)
2039                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2040                                 FATTR4_WORD0_LINK_SUPPORT|
2041                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2042                                 FATTR4_WORD0_ACLSUPPORT);
2043         return status;
2044 }
2045
2046 /*
2047  * a RENEW request
2048  */
2049 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2050 {
2051         struct xdr_stream xdr;
2052         struct compound_hdr hdr = {
2053                 .nops   = 1,
2054         };
2055
2056         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2057         encode_compound_hdr(&xdr, &hdr);
2058         return encode_renew(&xdr, clp);
2059 }
2060
2061 /*
2062  * a SETCLIENTID request
2063  */
2064 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2065 {
2066         struct xdr_stream xdr;
2067         struct compound_hdr hdr = {
2068                 .nops   = 1,
2069         };
2070
2071         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2072         encode_compound_hdr(&xdr, &hdr);
2073         return encode_setclientid(&xdr, sc);
2074 }
2075
2076 /*
2077  * a SETCLIENTID_CONFIRM request
2078  */
2079 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2080 {
2081         struct xdr_stream xdr;
2082         struct compound_hdr hdr = {
2083                 .nops   = 3,
2084         };
2085         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2086         int status;
2087
2088         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2089         encode_compound_hdr(&xdr, &hdr);
2090         status = encode_setclientid_confirm(&xdr, clp);
2091         if (!status)
2092                 status = encode_putrootfh(&xdr);
2093         if (!status)
2094                 status = encode_fsinfo(&xdr, lease_bitmap);
2095         return status;
2096 }
2097
2098 /*
2099  * DELEGRETURN request
2100  */
2101 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2102 {
2103         struct xdr_stream xdr;
2104         struct compound_hdr hdr = {
2105                 .nops = 3,
2106         };
2107         int status;
2108
2109         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2110         encode_compound_hdr(&xdr, &hdr);
2111         status = encode_putfh(&xdr, args->fhandle);
2112         if (status != 0)
2113                 goto out;
2114         status = encode_delegreturn(&xdr, args->stateid);
2115         if (status != 0)
2116                 goto out;
2117         status = encode_getfattr(&xdr, args->bitmask);
2118 out:
2119         return status;
2120 }
2121
2122 /*
2123  * Encode FS_LOCATIONS request
2124  */
2125 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2126 {
2127         struct xdr_stream xdr;
2128         struct compound_hdr hdr = {
2129                 .nops = 3,
2130         };
2131         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2132         int replen;
2133         int status;
2134
2135         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2136         encode_compound_hdr(&xdr, &hdr);
2137         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2138                 goto out;
2139         if ((status = encode_lookup(&xdr, args->name)) != 0)
2140                 goto out;
2141         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2142                 goto out;
2143         /* set up reply
2144          *   toplevel_status + OP_PUTFH + status
2145          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2146          */
2147         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2148         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2149                         0, PAGE_SIZE);
2150 out:
2151         return status;
2152 }
2153
2154 /*
2155  * START OF "GENERIC" DECODE ROUTINES.
2156  *   These may look a little ugly since they are imported from a "generic"
2157  * set of XDR encode/decode routines which are intended to be shared by
2158  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2159  *
2160  * If the pain of reading these is too great, it should be a straightforward
2161  * task to translate them into Linux-specific versions which are more
2162  * consistent with the style used in NFSv2/v3...
2163  */
2164 #define READ32(x)         (x) = ntohl(*p++)
2165 #define READ64(x)         do {                  \
2166         (x) = (u64)ntohl(*p++) << 32;           \
2167         (x) |= ntohl(*p++);                     \
2168 } while (0)
2169 #define READTIME(x)       do {                  \
2170         p++;                                    \
2171         (x.tv_sec) = ntohl(*p++);               \
2172         (x.tv_nsec) = ntohl(*p++);              \
2173 } while (0)
2174 #define COPYMEM(x,nbytes) do {                  \
2175         memcpy((x), p, nbytes);                 \
2176         p += XDR_QUADLEN(nbytes);               \
2177 } while (0)
2178
2179 #define READ_BUF(nbytes)  do { \
2180         p = xdr_inline_decode(xdr, nbytes); \
2181         if (unlikely(!p)) { \
2182                 dprintk("nfs: %s: prematurely hit end of receive" \
2183                                 " buffer\n", __FUNCTION__); \
2184                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2185                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2186                 return -EIO; \
2187         } \
2188 } while (0)
2189
2190 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2191 {
2192         __be32 *p;
2193
2194         READ_BUF(4);
2195         READ32(*len);
2196         READ_BUF(*len);
2197         *string = (char *)p;
2198         return 0;
2199 }
2200
2201 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2202 {
2203         __be32 *p;
2204
2205         READ_BUF(8);
2206         READ32(hdr->status);
2207         READ32(hdr->taglen);
2208
2209         READ_BUF(hdr->taglen + 4);
2210         hdr->tag = (char *)p;
2211         p += XDR_QUADLEN(hdr->taglen);
2212         READ32(hdr->nops);
2213         return 0;
2214 }
2215
2216 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2217 {
2218         __be32 *p;
2219         uint32_t opnum;
2220         int32_t nfserr;
2221
2222         READ_BUF(8);
2223         READ32(opnum);
2224         if (opnum != expected) {
2225                 dprintk("nfs: Server returned operation"
2226                         " %d but we issued a request for %d\n",
2227                                 opnum, expected);
2228                 return -EIO;
2229         }
2230         READ32(nfserr);
2231         if (nfserr != NFS_OK)
2232                 return -nfs4_stat_to_errno(nfserr);
2233         return 0;
2234 }
2235
2236 /* Dummy routine */
2237 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2238 {
2239         __be32 *p;
2240         unsigned int strlen;
2241         char *str;
2242
2243         READ_BUF(12);
2244         return decode_opaque_inline(xdr, &strlen, &str);
2245 }
2246
2247 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2248 {
2249         uint32_t bmlen;
2250         __be32 *p;
2251
2252         READ_BUF(4);
2253         READ32(bmlen);
2254
2255         bitmap[0] = bitmap[1] = 0;
2256         READ_BUF((bmlen << 2));
2257         if (bmlen > 0) {
2258                 READ32(bitmap[0]);
2259                 if (bmlen > 1)
2260                         READ32(bitmap[1]);
2261         }
2262         return 0;
2263 }
2264
2265 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2266 {
2267         __be32 *p;
2268
2269         READ_BUF(4);
2270         READ32(*attrlen);
2271         *savep = xdr->p;
2272         return 0;
2273 }
2274
2275 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2276 {
2277         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2278                 decode_attr_bitmap(xdr, bitmask);
2279                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2280         } else
2281                 bitmask[0] = bitmask[1] = 0;
2282         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2283         return 0;
2284 }
2285
2286 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2287 {
2288         __be32 *p;
2289
2290         *type = 0;
2291         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2292                 return -EIO;
2293         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2294                 READ_BUF(4);
2295                 READ32(*type);
2296                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2297                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2298                         return -EIO;
2299                 }
2300                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2301         }
2302         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2303         return 0;
2304 }
2305
2306 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2307 {
2308         __be32 *p;
2309
2310         *change = 0;
2311         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2312                 return -EIO;
2313         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2314                 READ_BUF(8);
2315                 READ64(*change);
2316                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2317         }
2318         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2319                         (unsigned long long)*change);
2320         return 0;
2321 }
2322
2323 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2324 {
2325         __be32 *p;
2326
2327         *size = 0;
2328         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2329                 return -EIO;
2330         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2331                 READ_BUF(8);
2332                 READ64(*size);
2333                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2334         }
2335         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2336         return 0;
2337 }
2338
2339 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2340 {
2341         __be32 *p;
2342
2343         *res = 0;
2344         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2345                 return -EIO;
2346         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2347                 READ_BUF(4);
2348                 READ32(*res);
2349                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2350         }
2351         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2352         return 0;
2353 }
2354
2355 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2356 {
2357         __be32 *p;
2358
2359         *res = 0;
2360         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2361                 return -EIO;
2362         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2363                 READ_BUF(4);
2364                 READ32(*res);
2365                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2366         }
2367         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2368         return 0;
2369 }
2370
2371 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2372 {
2373         __be32 *p;
2374
2375         fsid->major = 0;
2376         fsid->minor = 0;
2377         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2378                 return -EIO;
2379         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2380                 READ_BUF(16);
2381                 READ64(fsid->major);
2382                 READ64(fsid->minor);
2383                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2384         }
2385         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2386                         (unsigned long long)fsid->major,
2387                         (unsigned long long)fsid->minor);
2388         return 0;
2389 }
2390
2391 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2392 {
2393         __be32 *p;
2394
2395         *res = 60;
2396         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2397                 return -EIO;
2398         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2399                 READ_BUF(4);
2400                 READ32(*res);
2401                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2402         }
2403         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2404         return 0;
2405 }
2406
2407 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2408 {
2409         __be32 *p;
2410
2411         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2412         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2413                 return -EIO;
2414         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2415                 READ_BUF(4);
2416                 READ32(*res);
2417                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2418         }
2419         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2420         return 0;
2421 }
2422
2423 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2424 {
2425         __be32 *p;
2426
2427         *fileid = 0;
2428         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2429                 return -EIO;
2430         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2431                 READ_BUF(8);
2432                 READ64(*fileid);
2433                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2434         }
2435         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2436         return 0;
2437 }
2438
2439 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2440 {
2441         __be32 *p;
2442
2443         *fileid = 0;
2444         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2445                 return -EIO;
2446         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2447                 READ_BUF(8);
2448                 READ64(*fileid);
2449                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2450         }
2451         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2452         return 0;
2453 }
2454
2455 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2456 {
2457         __be32 *p;
2458         int status = 0;
2459
2460         *res = 0;
2461         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2462                 return -EIO;
2463         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2464                 READ_BUF(8);
2465                 READ64(*res);
2466                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2467         }
2468         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2469         return status;
2470 }
2471
2472 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2473 {
2474         __be32 *p;
2475         int status = 0;
2476
2477         *res = 0;
2478         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2479                 return -EIO;
2480         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2481                 READ_BUF(8);
2482                 READ64(*res);
2483                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2484         }
2485         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2486         return status;
2487 }
2488
2489 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2490 {
2491         __be32 *p;
2492         int status = 0;
2493
2494         *res = 0;
2495         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2496                 return -EIO;
2497         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2498                 READ_BUF(8);
2499                 READ64(*res);
2500                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2501         }
2502         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2503         return status;
2504 }
2505
2506 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2507 {
2508         int n;
2509         __be32 *p;
2510         int status = 0;
2511
2512         READ_BUF(4);
2513         READ32(n);
2514         if (n < 0)
2515                 goto out_eio;
2516         if (n == 0)
2517                 goto root_path;
2518         dprintk("path ");
2519         path->ncomponents = 0;
2520         while (path->ncomponents < n) {
2521                 struct nfs4_string *component = &path->components[path->ncomponents];
2522                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2523                 if (unlikely(status != 0))
2524                         goto out_eio;
2525                 if (path->ncomponents != n)
2526                         dprintk("/");
2527                 dprintk("%s", component->data);
2528                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2529                         path->ncomponents++;
2530                 else {
2531                         dprintk("cannot parse %d components in path\n", n);
2532                         goto out_eio;
2533                 }
2534         }
2535 out:
2536         dprintk("\n");
2537         return status;
2538 root_path:
2539 /* a root pathname is sent as a zero component4 */
2540         path->ncomponents = 1;
2541         path->components[0].len=0;
2542         path->components[0].data=NULL;
2543         dprintk("path /\n");
2544         goto out;
2545 out_eio:
2546         dprintk(" status %d", status);
2547         status = -EIO;
2548         goto out;
2549 }
2550
2551 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2552 {
2553         int n;
2554         __be32 *p;
2555         int status = -EIO;
2556
2557         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2558                 goto out;
2559         status = 0;
2560         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2561                 goto out;
2562         dprintk("%s: fsroot ", __FUNCTION__);
2563         status = decode_pathname(xdr, &res->fs_path);
2564         if (unlikely(status != 0))
2565                 goto out;
2566         READ_BUF(4);
2567         READ32(n);
2568         if (n <= 0)
2569                 goto out_eio;
2570         res->nlocations = 0;
2571         while (res->nlocations < n) {
2572                 int m;
2573                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2574
2575                 READ_BUF(4);
2576                 READ32(m);
2577                 if (m <= 0)
2578                         goto out_eio;
2579
2580                 loc->nservers = 0;
2581                 dprintk("%s: servers ", __FUNCTION__);
2582                 while (loc->nservers < m) {
2583                         struct nfs4_string *server = &loc->servers[loc->nservers];
2584                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2585                         if (unlikely(status != 0))
2586                                 goto out_eio;
2587                         dprintk("%s ", server->data);
2588                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2589                                 loc->nservers++;
2590                         else {
2591                                 int i;
2592                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2593                                 for (i = loc->nservers; i < m; i++) {
2594                                         unsigned int len;
2595                                         char *data;
2596                                         status = decode_opaque_inline(xdr, &len, &data);
2597                                         if (unlikely(status != 0))
2598                                                 goto out_eio;
2599                                 }
2600                         }
2601                 }
2602                 status = decode_pathname(xdr, &loc->rootpath);
2603                 if (unlikely(status != 0))
2604                         goto out_eio;
2605                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2606                         res->nlocations++;
2607         }
2608 out:
2609         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2610         return status;
2611 out_eio:
2612         status = -EIO;
2613         goto out;
2614 }
2615
2616 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2617 {
2618         __be32 *p;
2619         int status = 0;
2620
2621         *res = 0;
2622         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2623                 return -EIO;
2624         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2625                 READ_BUF(8);
2626                 READ64(*res);
2627                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2628         }
2629         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2630         return status;
2631 }
2632
2633 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2634 {
2635         __be32 *p;
2636         int status = 0;
2637
2638         *maxlink = 1;
2639         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2640                 return -EIO;
2641         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2642                 READ_BUF(4);
2643                 READ32(*maxlink);
2644                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2645         }
2646         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2647         return status;
2648 }
2649
2650 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2651 {
2652         __be32 *p;
2653         int status = 0;
2654
2655         *maxname = 1024;
2656         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2657                 return -EIO;
2658         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2659                 READ_BUF(4);
2660                 READ32(*maxname);
2661                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2662         }
2663         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2664         return status;
2665 }
2666
2667 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2668 {
2669         __be32 *p;
2670         int status = 0;
2671
2672         *res = 1024;
2673         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2674                 return -EIO;
2675         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2676                 uint64_t maxread;
2677                 READ_BUF(8);
2678                 READ64(maxread);
2679                 if (maxread > 0x7FFFFFFF)
2680                         maxread = 0x7FFFFFFF;
2681                 *res = (uint32_t)maxread;
2682                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2683         }
2684         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2685         return status;
2686 }
2687
2688 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2689 {
2690         __be32 *p;
2691         int status = 0;
2692
2693         *res = 1024;
2694         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2695                 return -EIO;
2696         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2697                 uint64_t maxwrite;
2698                 READ_BUF(8);
2699                 READ64(maxwrite);
2700                 if (maxwrite > 0x7FFFFFFF)
2701                         maxwrite = 0x7FFFFFFF;
2702                 *res = (uint32_t)maxwrite;
2703                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2704         }
2705         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2706         return status;
2707 }
2708
2709 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2710 {
2711         __be32 *p;
2712
2713         *mode = 0;
2714         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2715                 return -EIO;
2716         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2717                 READ_BUF(4);
2718                 READ32(*mode);
2719                 *mode &= ~S_IFMT;
2720                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2721         }
2722         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2723         return 0;
2724 }
2725
2726 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2727 {
2728         __be32 *p;
2729
2730         *nlink = 1;
2731         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2732                 return -EIO;
2733         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2734                 READ_BUF(4);
2735                 READ32(*nlink);
2736                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2737         }
2738         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2739         return 0;
2740 }
2741
2742 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2743 {
2744         uint32_t len;
2745         __be32 *p;
2746
2747         *uid = -2;
2748         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2749                 return -EIO;
2750         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2751                 READ_BUF(4);
2752                 READ32(len);
2753                 READ_BUF(len);
2754                 if (len < XDR_MAX_NETOBJ) {
2755                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2756                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2757                                                 __FUNCTION__);
2758                 } else
2759                         dprintk("%s: name too long (%u)!\n",
2760                                         __FUNCTION__, len);
2761                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2762         }
2763         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2764         return 0;
2765 }
2766
2767 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2768 {
2769         uint32_t len;
2770         __be32 *p;
2771
2772         *gid = -2;
2773         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2774                 return -EIO;
2775         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2776                 READ_BUF(4);
2777                 READ32(len);
2778                 READ_BUF(len);
2779                 if (len < XDR_MAX_NETOBJ) {
2780                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2781                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2782                                                 __FUNCTION__);
2783                 } else
2784                         dprintk("%s: name too long (%u)!\n",
2785                                         __FUNCTION__, len);
2786                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2787         }
2788         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2789         return 0;
2790 }
2791
2792 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2793 {
2794         uint32_t major = 0, minor = 0;
2795         __be32 *p;
2796
2797         *rdev = MKDEV(0,0);
2798         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2799                 return -EIO;
2800         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2801                 dev_t tmp;
2802
2803                 READ_BUF(8);
2804                 READ32(major);
2805                 READ32(minor);
2806                 tmp = MKDEV(major, minor);
2807                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2808                         *rdev = tmp;
2809                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2810         }
2811         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2812         return 0;
2813 }
2814
2815 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2816 {
2817         __be32 *p;
2818         int status = 0;
2819
2820         *res = 0;
2821         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2822                 return -EIO;
2823         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2824                 READ_BUF(8);
2825                 READ64(*res);
2826                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2827         }
2828         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2829         return status;
2830 }
2831
2832 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2833 {
2834         __be32 *p;
2835         int status = 0;
2836
2837         *res = 0;
2838         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2839                 return -EIO;
2840         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2841                 READ_BUF(8);
2842                 READ64(*res);
2843                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2844         }
2845         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2846         return status;
2847 }
2848
2849 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2850 {
2851         __be32 *p;
2852         int status = 0;
2853
2854         *res = 0;
2855         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2856                 return -EIO;
2857         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2858                 READ_BUF(8);
2859                 READ64(*res);
2860                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2861         }
2862         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2863         return status;
2864 }
2865
2866 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2867 {
2868         __be32 *p;
2869
2870         *used = 0;
2871         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2872                 return -EIO;
2873         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2874                 READ_BUF(8);
2875                 READ64(*used);
2876                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2877         }
2878         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2879                         (unsigned long long)*used);
2880         return 0;
2881 }
2882
2883 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2884 {
2885         __be32 *p;
2886         uint64_t sec;
2887         uint32_t nsec;
2888
2889         READ_BUF(12);
2890         READ64(sec);
2891         READ32(nsec);
2892         time->tv_sec = (time_t)sec;
2893         time->tv_nsec = (long)nsec;
2894         return 0;
2895 }
2896
2897 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2898 {
2899         int status = 0;
2900
2901         time->tv_sec = 0;
2902         time->tv_nsec = 0;
2903         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2904                 return -EIO;
2905         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2906                 status = decode_attr_time(xdr, time);
2907                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2908         }
2909         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2910         return status;
2911 }
2912
2913 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2914 {
2915         int status = 0;
2916
2917         time->tv_sec = 0;
2918         time->tv_nsec = 0;
2919         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2920                 return -EIO;
2921         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2922                 status = decode_attr_time(xdr, time);
2923                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2924         }
2925         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2926         return status;
2927 }
2928
2929 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2930 {
2931         int status = 0;
2932
2933         time->tv_sec = 0;
2934         time->tv_nsec = 0;
2935         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2936                 return -EIO;
2937         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2938                 status = decode_attr_time(xdr, time);
2939                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2940         }
2941         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2942         return status;
2943 }
2944
2945 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2946 {
2947         unsigned int attrwords = XDR_QUADLEN(attrlen);
2948         unsigned int nwords = xdr->p - savep;
2949
2950         if (unlikely(attrwords != nwords)) {
2951                 dprintk("%s: server returned incorrect attribute length: "
2952                         "%u %c %u\n",
2953                                 __FUNCTION__,
2954                                 attrwords << 2,
2955                                 (attrwords < nwords) ? '<' : '>',
2956                                 nwords << 2);
2957                 return -EIO;
2958         }
2959         return 0;
2960 }
2961
2962 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2963 {
2964         __be32 *p;
2965
2966         READ_BUF(20);
2967         READ32(cinfo->atomic);
2968         READ64(cinfo->before);
2969         READ64(cinfo->after);
2970         return 0;
2971 }
2972
2973 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2974 {
2975         __be32 *p;
2976         uint32_t supp, acc;
2977         int status;
2978
2979         status = decode_op_hdr(xdr, OP_ACCESS);
2980         if (status)
2981                 return status;
2982         READ_BUF(8);
2983         READ32(supp);
2984         READ32(acc);
2985         access->supported = supp;
2986         access->access = acc;
2987         return 0;
2988 }
2989
2990 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2991 {
2992         __be32 *p;
2993         int status;
2994
2995         status = decode_op_hdr(xdr, OP_CLOSE);
2996         if (status)
2997                 return status;
2998         READ_BUF(NFS4_STATEID_SIZE);
2999         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3000         return 0;
3001 }
3002
3003 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3004 {
3005         __be32 *p;
3006         int status;
3007
3008         status = decode_op_hdr(xdr, OP_COMMIT);
3009         if (status)
3010                 return status;
3011         READ_BUF(8);
3012         COPYMEM(res->verf->verifier, 8);
3013         return 0;
3014 }
3015
3016 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3017 {
3018         __be32 *p;
3019         uint32_t bmlen;
3020         int status;
3021
3022         status = decode_op_hdr(xdr, OP_CREATE);
3023         if (status)
3024                 return status;
3025         if ((status = decode_change_info(xdr, cinfo)))
3026                 return status;
3027         READ_BUF(4);
3028         READ32(bmlen);
3029         READ_BUF(bmlen << 2);
3030         return 0;
3031 }
3032
3033 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3034 {
3035         __be32 *savep;
3036         uint32_t attrlen,
3037                  bitmap[2] = {0};
3038         int status;
3039
3040         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3041                 goto xdr_error;
3042         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3043                 goto xdr_error;
3044         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3045                 goto xdr_error;
3046         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3047                 goto xdr_error;
3048         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3049                 goto xdr_error;
3050         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3051                 goto xdr_error;
3052         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3053                 goto xdr_error;
3054         status = verify_attr_len(xdr, savep, attrlen);
3055 xdr_error:
3056         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3057         return status;
3058 }
3059
3060 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3061 {
3062         __be32 *savep;
3063         uint32_t attrlen,
3064                  bitmap[2] = {0};
3065         int status;
3066
3067         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3068                 goto xdr_error;
3069         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3070                 goto xdr_error;
3071         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3072                 goto xdr_error;
3073
3074         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3075                 goto xdr_error;
3076         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3077                 goto xdr_error;
3078         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3079                 goto xdr_error;
3080         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3081                 goto xdr_error;
3082         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3083                 goto xdr_error;
3084         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3085                 goto xdr_error;
3086
3087         status = verify_attr_len(xdr, savep, attrlen);
3088 xdr_error:
3089         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3090         return status;
3091 }
3092
3093 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3094 {
3095         __be32 *savep;
3096         uint32_t attrlen,
3097                  bitmap[2] = {0};
3098         int status;
3099
3100         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3101                 goto xdr_error;
3102         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3103                 goto xdr_error;
3104         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3105                 goto xdr_error;
3106
3107         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3108                 goto xdr_error;
3109         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3110                 goto xdr_error;
3111
3112         status = verify_attr_len(xdr, savep, attrlen);
3113 xdr_error:
3114         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3115         return status;
3116 }
3117
3118 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3119 {
3120         __be32 *savep;
3121         uint32_t attrlen,
3122                  bitmap[2] = {0},
3123                  type;
3124         int status, fmode = 0;
3125         uint64_t fileid;
3126
3127         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3128                 goto xdr_error;
3129         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3130                 goto xdr_error;
3131
3132         fattr->bitmap[0] = bitmap[0];
3133         fattr->bitmap[1] = bitmap[1];
3134
3135         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3136                 goto xdr_error;
3137
3138
3139         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3140                 goto xdr_error;
3141         fattr->type = nfs_type2fmt[type].nfs2type;
3142         fmode = nfs_type2fmt[type].mode;
3143
3144         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3145                 goto xdr_error;
3146         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3147                 goto xdr_error;
3148         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3149                 goto xdr_error;
3150         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3151                 goto xdr_error;
3152         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3153                                                 struct nfs4_fs_locations,
3154                                                 fattr))) != 0)
3155                 goto xdr_error;
3156         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3157                 goto xdr_error;
3158         fattr->mode |= fmode;
3159         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3160                 goto xdr_error;
3161         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3162                 goto xdr_error;
3163         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3164                 goto xdr_error;
3165         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3166                 goto xdr_error;
3167         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3168                 goto xdr_error;
3169         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3170                 goto xdr_error;
3171         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3172                 goto xdr_error;
3173         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3174                 goto xdr_error;
3175         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3176                 goto xdr_error;
3177         if (fattr->fileid == 0 && fileid != 0)
3178                 fattr->fileid = fileid;
3179         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3180                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3181 xdr_error:
3182         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3183         return status;
3184 }
3185
3186
3187 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3188 {
3189         __be32 *savep;
3190         uint32_t attrlen, bitmap[2];
3191         int status;
3192
3193         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3194                 goto xdr_error;
3195         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3196                 goto xdr_error;
3197         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3198                 goto xdr_error;
3199
3200         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3201
3202         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3203                 goto xdr_error;
3204         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3205                 goto xdr_error;
3206         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3207                 goto xdr_error;
3208         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3209         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3210                 goto xdr_error;
3211         fsinfo->wtpref = fsinfo->wtmax;
3212
3213         status = verify_attr_len(xdr, savep, attrlen);
3214 xdr_error:
3215         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3216         return status;
3217 }
3218
3219 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3220 {
3221         __be32 *p;
3222         uint32_t len;
3223         int status;
3224
3225         /* Zero handle first to allow comparisons */
3226         memset(fh, 0, sizeof(*fh));
3227
3228         status = decode_op_hdr(xdr, OP_GETFH);
3229         if (status)
3230                 return status;
3231
3232         READ_BUF(4);
3233         READ32(len);
3234         if (len > NFS4_FHSIZE)
3235                 return -EIO;
3236         fh->size = len;
3237         READ_BUF(len);
3238         COPYMEM(fh->data, len);
3239         return 0;
3240 }
3241
3242 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3243 {
3244         int status;
3245
3246         status = decode_op_hdr(xdr, OP_LINK);
3247         if (status)
3248                 return status;
3249         return decode_change_info(xdr, cinfo);
3250 }
3251
3252 /*
3253  * We create the owner, so we know a proper owner.id length is 4.
3254  */
3255 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3256 {
3257         uint64_t offset, length, clientid;
3258         __be32 *p;
3259         uint32_t namelen, type;
3260
3261         READ_BUF(32);
3262         READ64(offset);
3263         READ64(length);
3264         READ32(type);
3265         if (fl != NULL) {
3266                 fl->fl_start = (loff_t)offset;
3267                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3268                 if (length == ~(uint64_t)0)
3269                         fl->fl_end = OFFSET_MAX;
3270                 fl->fl_type = F_WRLCK;
3271                 if (type & 1)
3272                         fl->fl_type = F_RDLCK;
3273                 fl->fl_pid = 0;
3274         }
3275         READ64(clientid);
3276         READ32(namelen);
3277         READ_BUF(namelen);
3278         return -NFS4ERR_DENIED;
3279 }
3280
3281 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3282 {
3283         __be32 *p;
3284         int status;
3285
3286         status = decode_op_hdr(xdr, OP_LOCK);
3287         if (status == 0) {
3288                 READ_BUF(NFS4_STATEID_SIZE);
3289                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3290         } else if (status == -NFS4ERR_DENIED)
3291                 return decode_lock_denied(xdr, NULL);
3292         return status;
3293 }
3294
3295 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3296 {
3297         int status;
3298         status = decode_op_hdr(xdr, OP_LOCKT);
3299         if (status == -NFS4ERR_DENIED)
3300                 return decode_lock_denied(xdr, res->denied);
3301         return status;
3302 }
3303
3304 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3305 {
3306         __be32 *p;
3307         int status;
3308
3309         status = decode_op_hdr(xdr, OP_LOCKU);
3310         if (status == 0) {
3311                 READ_BUF(NFS4_STATEID_SIZE);
3312                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3313         }
3314         return status;
3315 }
3316
3317 static int decode_lookup(struct xdr_stream *xdr)
3318 {
3319         return decode_op_hdr(xdr, OP_LOOKUP);
3320 }
3321
3322 /* This is too sick! */
3323 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3324 {
3325         __be32 *p;
3326         uint32_t limit_type, nblocks, blocksize;
3327
3328         READ_BUF(12);
3329         READ32(limit_type);
3330         switch (limit_type) {
3331                 case 1:
3332                         READ64(*maxsize);
3333                         break;
3334                 case 2:
3335                         READ32(nblocks);
3336                         READ32(blocksize);
3337                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3338         }
3339         return 0;
3340 }
3341
3342 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3343 {
3344         __be32 *p;
3345         uint32_t delegation_type;
3346
3347         READ_BUF(4);
3348         READ32(delegation_type);
3349         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3350                 res->delegation_type = 0;
3351                 return 0;
3352         }
3353         READ_BUF(NFS4_STATEID_SIZE+4);
3354         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3355         READ32(res->do_recall);
3356         switch (delegation_type) {
3357                 case NFS4_OPEN_DELEGATE_READ:
3358                         res->delegation_type = FMODE_READ;
3359                         break;
3360                 case NFS4_OPEN_DELEGATE_WRITE:
3361                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3362                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3363                                 return -EIO;
3364         }
3365         return decode_ace(xdr, NULL, res->server->nfs_client);
3366 }
3367
3368 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3369 {
3370         __be32 *p;
3371         uint32_t savewords, bmlen, i;
3372         int status;
3373
3374         status = decode_op_hdr(xdr, OP_OPEN);
3375         if (status)
3376                 return status;
3377         READ_BUF(NFS4_STATEID_SIZE);
3378         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3379
3380         decode_change_info(xdr, &res->cinfo);
3381
3382         READ_BUF(8);
3383         READ32(res->rflags);
3384         READ32(bmlen);
3385         if (bmlen > 10)
3386                 goto xdr_error;
3387
3388         READ_BUF(bmlen << 2);
3389         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3390         for (i = 0; i < savewords; ++i)
3391                 READ32(res->attrset[i]);
3392         for (; i < NFS4_BITMAP_SIZE; i++)
3393                 res->attrset[i] = 0;
3394
3395         return decode_delegation(xdr, res);
3396 xdr_error:
3397         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3398         return -EIO;
3399 }
3400
3401 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3402 {
3403         __be32 *p;
3404         int status;
3405
3406         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3407         if (status)
3408                 return status;
3409         READ_BUF(NFS4_STATEID_SIZE);
3410         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3411         return 0;
3412 }
3413
3414 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3415 {
3416         __be32 *p;
3417         int status;
3418
3419         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3420         if (status)
3421                 return status;
3422         READ_BUF(NFS4_STATEID_SIZE);
3423         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3424         return 0;
3425 }
3426
3427 static int decode_putfh(struct xdr_stream *xdr)
3428 {
3429         return decode_op_hdr(xdr, OP_PUTFH);
3430 }
3431
3432 static int decode_putrootfh(struct xdr_stream *xdr)
3433 {
3434         return decode_op_hdr(xdr, OP_PUTROOTFH);
3435 }
3436
3437 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3438 {
3439         struct kvec *iov = req->rq_rcv_buf.head;
3440         __be32 *p;
3441         uint32_t count, eof, recvd, hdrlen;
3442         int status;
3443
3444         status = decode_op_hdr(xdr, OP_READ);
3445         if (status)
3446                 return status;
3447         READ_BUF(8);
3448         READ32(eof);
3449         READ32(count);
3450         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3451         recvd = req->rq_rcv_buf.len - hdrlen;
3452         if (count > recvd) {
3453                 dprintk("NFS: server cheating in read reply: "
3454                                 "count %u > recvd %u\n", count, recvd);
3455                 count = recvd;
3456                 eof = 0;
3457         }
3458         xdr_read_pages(xdr, count);
3459         res->eof = eof;
3460         res->count = count;
3461         return 0;
3462 }
3463
3464 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3465 {
3466         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3467         struct page     *page = *rcvbuf->pages;
3468         struct kvec     *iov = rcvbuf->head;
3469         unsigned int    nr, pglen = rcvbuf->page_len;
3470         __be32          *end, *entry, *p, *kaddr;
3471         uint32_t        len, attrlen, xlen;
3472         int             hdrlen, recvd, status;
3473
3474         status = decode_op_hdr(xdr, OP_READDIR);
3475         if (status)
3476                 return status;
3477         READ_BUF(8);
3478         COPYMEM(readdir->verifier.data, 8);
3479         dprintk("%s: verifier = 0x%x%x\n",
3480                         __FUNCTION__,
3481                         ((u32 *)readdir->verifier.data)[0],
3482                         ((u32 *)readdir->verifier.data)[1]);
3483
3484
3485         hdrlen = (char *) p - (char *) iov->iov_base;
3486         recvd = rcvbuf->len - hdrlen;
3487         if (pglen > recvd)
3488                 pglen = recvd;
3489         xdr_read_pages(xdr, pglen);
3490
3491         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3492         kaddr = p = kmap_atomic(page, KM_USER0);
3493         end = p + ((pglen + readdir->pgbase) >> 2);
3494         entry = p;
3495         for (nr = 0; *p++; nr++) {
3496                 if (end - p < 3)
3497                         goto short_pkt;
3498                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3499                 p += 2;                 /* cookie */
3500                 len = ntohl(*p++);      /* filename length */
3501                 if (len > NFS4_MAXNAMLEN) {
3502                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3503                                         len);
3504                         goto err_unmap;
3505                 }
3506                 xlen = XDR_QUADLEN(len);
3507                 if (end - p < xlen + 1)
3508                         goto short_pkt;
3509                 dprintk("filename = %*s\n", len, (char *)p);
3510                 p += xlen;
3511                 len = ntohl(*p++);      /* bitmap length */
3512                 if (end - p < len + 1)
3513                         goto short_pkt;
3514                 p += len;
3515                 attrlen = XDR_QUADLEN(ntohl(*p++));
3516                 if (end - p < attrlen + 2)
3517                         goto short_pkt;
3518                 p += attrlen;           /* attributes */
3519                 entry = p;
3520         }
3521         if (!nr && (entry[0] != 0 || entry[1] == 0))
3522                 goto short_pkt;
3523 out:
3524         kunmap_atomic(kaddr, KM_USER0);
3525         return 0;
3526 short_pkt:
3527         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3528         entry[0] = entry[1] = 0;
3529         /* truncate listing ? */
3530         if (!nr) {
3531                 dprintk("NFS: readdir reply truncated!\n");
3532                 entry[1] = 1;
3533         }
3534         goto out;
3535 err_unmap:
3536         kunmap_atomic(kaddr, KM_USER0);
3537         return -errno_NFSERR_IO;
3538 }
3539
3540 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3541 {
3542         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3543         struct kvec *iov = rcvbuf->head;
3544         int hdrlen, len, recvd;
3545         __be32 *p;
3546         char *kaddr;
3547         int status;
3548
3549         status = decode_op_hdr(xdr, OP_READLINK);
3550         if (status)
3551                 return status;
3552
3553         /* Convert length of symlink */
3554         READ_BUF(4);
3555         READ32(len);
3556         if (len >= rcvbuf->page_len || len <= 0) {
3557                 dprintk("nfs: server returned giant symlink!\n");
3558                 return -ENAMETOOLONG;
3559         }
3560         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3561         recvd = req->rq_rcv_buf.len - hdrlen;
3562         if (recvd < len) {
3563                 dprintk("NFS: server cheating in readlink reply: "
3564                                 "count %u > recvd %u\n", len, recvd);
3565                 return -EIO;
3566         }
3567         xdr_read_pages(xdr, len);
3568         /*
3569          * The XDR encode routine has set things up so that
3570          * the link text will be copied directly into the
3571          * buffer.  We just have to do overflow-checking,
3572          * and and null-terminate the text (the VFS expects
3573          * null-termination).
3574          */
3575         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3576         kaddr[len+rcvbuf->page_base] = '\0';
3577         kunmap_atomic(kaddr, KM_USER0);
3578         return 0;
3579 }
3580
3581 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3582 {
3583         int status;
3584
3585         status = decode_op_hdr(xdr, OP_REMOVE);
3586         if (status)
3587                 goto out;
3588         status = decode_change_info(xdr, cinfo);
3589 out:
3590         return status;
3591 }
3592
3593 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3594               struct nfs4_change_info *new_cinfo)
3595 {
3596         int status;
3597
3598         status = decode_op_hdr(xdr, OP_RENAME);
3599         if (status)
3600                 goto out;
3601         if ((status = decode_change_info(xdr, old_cinfo)))
3602                 goto out;
3603         status = decode_change_info(xdr, new_cinfo);
3604 out:
3605         return status;
3606 }
3607
3608 static int decode_renew(struct xdr_stream *xdr)
3609 {
3610         return decode_op_hdr(xdr, OP_RENEW);
3611 }
3612
3613 static int
3614 decode_restorefh(struct xdr_stream *xdr)
3615 {
3616         return decode_op_hdr(xdr, OP_RESTOREFH);
3617 }
3618
3619 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3620                 size_t *acl_len)
3621 {
3622         __be32 *savep;
3623         uint32_t attrlen,
3624                  bitmap[2] = {0};
3625         struct kvec *iov = req->rq_rcv_buf.head;
3626         int status;
3627
3628         *acl_len = 0;
3629         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3630                 goto out;
3631         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3632                 goto out;
3633         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3634                 goto out;
3635
3636         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3637                 return -EIO;
3638         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3639                 int hdrlen, recvd;
3640
3641                 /* We ignore &savep and don't do consistency checks on
3642                  * the attr length.  Let userspace figure it out.... */
3643                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3644                 recvd = req->rq_rcv_buf.len - hdrlen;
3645                 if (attrlen > recvd) {
3646                         dprintk("NFS: server cheating in getattr"
3647                                         " acl reply: attrlen %u > recvd %u\n",
3648                                         attrlen, recvd);
3649                         return -EINVAL;
3650                 }
3651                 xdr_read_pages(xdr, attrlen);
3652                 *acl_len = attrlen;
3653         } else
3654                 status = -EOPNOTSUPP;
3655
3656 out:
3657         return status;
3658 }
3659
3660 static int
3661 decode_savefh(struct xdr_stream *xdr)
3662 {
3663         return decode_op_hdr(xdr, OP_SAVEFH);
3664 }
3665
3666 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3667 {
3668         __be32 *p;
3669         uint32_t bmlen;
3670         int status;
3671
3672
3673         status = decode_op_hdr(xdr, OP_SETATTR);
3674         if (status)
3675                 return status;
3676         READ_BUF(4);
3677         READ32(bmlen);
3678         READ_BUF(bmlen << 2);
3679         return 0;
3680 }
3681
3682 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3683 {
3684         __be32 *p;
3685         uint32_t opnum;
3686         int32_t nfserr;
3687
3688         READ_BUF(8);
3689         READ32(opnum);
3690         if (opnum != OP_SETCLIENTID) {
3691                 dprintk("nfs: decode_setclientid: Server returned operation"
3692                                 " %d\n", opnum);
3693                 return -EIO;
3694         }
3695         READ32(nfserr);
3696         if (nfserr == NFS_OK) {
3697                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3698                 READ64(clp->cl_clientid);
3699                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3700         } else if (nfserr == NFSERR_CLID_INUSE) {
3701                 uint32_t len;
3702
3703                 /* skip netid string */
3704                 READ_BUF(4);
3705                 READ32(len);
3706                 READ_BUF(len);
3707
3708                 /* skip uaddr string */
3709                 READ_BUF(4);
3710                 READ32(len);
3711                 READ_BUF(len);
3712                 return -NFSERR_CLID_INUSE;
3713         } else
3714                 return -nfs4_stat_to_errno(nfserr);
3715
3716         return 0;
3717 }
3718
3719 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3720 {
3721         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3722 }
3723
3724 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3725 {
3726         __be32 *p;
3727         int status;
3728
3729         status = decode_op_hdr(xdr, OP_WRITE);
3730         if (status)
3731                 return status;
3732
3733         READ_BUF(16);
3734         READ32(res->count);
3735         READ32(res->verf->committed);
3736         COPYMEM(res->verf->verifier, 8);
3737         return 0;
3738 }
3739
3740 static int decode_delegreturn(struct xdr_stream *xdr)
3741 {
3742         return decode_op_hdr(xdr, OP_DELEGRETURN);
3743 }
3744
3745 /*
3746  * Decode OPEN_DOWNGRADE response
3747  */
3748 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3749 {
3750         struct xdr_stream xdr;
3751         struct compound_hdr hdr;
3752         int status;
3753
3754         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3755         status = decode_compound_hdr(&xdr, &hdr);
3756         if (status)
3757                 goto out;
3758         status = decode_putfh(&xdr);
3759         if (status)
3760                 goto out;
3761         status = decode_open_downgrade(&xdr, res);
3762         if (status != 0)
3763                 goto out;
3764         decode_getfattr(&xdr, res->fattr, res->server);
3765 out:
3766         return status;
3767 }
3768
3769 /*
3770  * END OF "GENERIC" DECODE ROUTINES.
3771  */
3772
3773 /*
3774  * Decode ACCESS response
3775  */
3776 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3777 {
3778         struct xdr_stream xdr;
3779         struct compound_hdr hdr;
3780         int status;
3781
3782         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3783         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3784                 goto out;
3785         if ((status = decode_putfh(&xdr)) == 0)
3786                 status = decode_access(&xdr, res);
3787 out:
3788         return status;
3789 }
3790
3791 /*
3792  * Decode LOOKUP response
3793  */
3794 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3795 {
3796         struct xdr_stream xdr;
3797         struct compound_hdr hdr;
3798         int status;
3799
3800         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3801         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3802                 goto out;
3803         if ((status = decode_putfh(&xdr)) != 0)
3804                 goto out;
3805         if ((status = decode_lookup(&xdr)) != 0)
3806                 goto out;
3807         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3808                 goto out;
3809         status = decode_getfattr(&xdr, res->fattr, res->server);
3810 out:
3811         return status;
3812 }
3813
3814 /*
3815  * Decode LOOKUP_ROOT response
3816  */
3817 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3818 {
3819         struct xdr_stream xdr;
3820         struct compound_hdr hdr;
3821         int status;
3822
3823         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3824         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3825                 goto out;
3826         if ((status = decode_putrootfh(&xdr)) != 0)
3827                 goto out;
3828         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3829                 status = decode_getfattr(&xdr, res->fattr, res->server);
3830 out:
3831         return status;
3832 }
3833
3834 /*
3835  * Decode REMOVE response
3836  */
3837 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3838 {
3839         struct xdr_stream xdr;
3840         struct compound_hdr hdr;
3841         int status;
3842
3843         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3844         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3845                 goto out;
3846         if ((status = decode_putfh(&xdr)) != 0)
3847                 goto out;
3848         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3849                 goto out;
3850         decode_getfattr(&xdr, &res->dir_attr, res->server);
3851 out:
3852         return status;
3853 }
3854
3855 /*
3856  * Decode RENAME response
3857  */
3858 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3859 {
3860         struct xdr_stream xdr;
3861         struct compound_hdr hdr;
3862         int status;
3863
3864         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3865         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3866                 goto out;
3867         if ((status = decode_putfh(&xdr)) != 0)
3868                 goto out;
3869         if ((status = decode_savefh(&xdr)) != 0)
3870                 goto out;
3871         if ((status = decode_putfh(&xdr)) != 0)
3872                 goto out;
3873         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3874                 goto out;
3875         /* Current FH is target directory */
3876         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3877                 goto out;
3878         if ((status = decode_restorefh(&xdr)) != 0)
3879                 goto out;
3880         decode_getfattr(&xdr, res->old_fattr, res->server);
3881 out:
3882         return status;
3883 }
3884
3885 /*
3886  * Decode LINK response
3887  */
3888 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3889 {
3890         struct xdr_stream xdr;
3891         struct compound_hdr hdr;
3892         int status;
3893
3894         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3895         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3896                 goto out;
3897         if ((status = decode_putfh(&xdr)) != 0)
3898                 goto out;
3899         if ((status = decode_savefh(&xdr)) != 0)
3900                 goto out;
3901         if ((status = decode_putfh(&xdr)) != 0)
3902                 goto out;
3903         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3904                 goto out;
3905         /*
3906          * Note order: OP_LINK leaves the directory as the current
3907          *             filehandle.
3908          */
3909         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3910                 goto out;
3911         if ((status = decode_restorefh(&xdr)) != 0)
3912                 goto out;
3913         decode_getfattr(&xdr, res->fattr, res->server);
3914 out:
3915         return status;
3916 }
3917
3918 /*
3919  * Decode CREATE response
3920  */
3921 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3922 {
3923         struct xdr_stream xdr;
3924         struct compound_hdr hdr;
3925         int status;
3926
3927         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3928         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3929                 goto out;
3930         if ((status = decode_putfh(&xdr)) != 0)
3931                 goto out;
3932         if ((status = decode_savefh(&xdr)) != 0)
3933                 goto out;
3934         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3935                 goto out;
3936         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3937                 goto out;
3938         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3939                 goto out;
3940         if ((status = decode_restorefh(&xdr)) != 0)
3941                 goto out;
3942         decode_getfattr(&xdr, res->dir_fattr, res->server);
3943 out:
3944         return status;
3945 }
3946
3947 /*
3948  * Decode SYMLINK response
3949  */
3950 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3951 {
3952         return nfs4_xdr_dec_create(rqstp, p, res);
3953 }
3954
3955 /*
3956  * Decode GETATTR response
3957  */
3958 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3959 {
3960         struct xdr_stream xdr;
3961         struct compound_hdr hdr;
3962         int status;
3963
3964         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3965         status = decode_compound_hdr(&xdr, &hdr);
3966         if (status)
3967                 goto out;
3968         status = decode_putfh(&xdr);
3969         if (status)
3970                 goto out;
3971         status = decode_getfattr(&xdr, res->fattr, res->server);
3972 out:
3973         return status;
3974
3975 }
3976
3977 /*
3978  * Encode an SETACL request
3979  */
3980 static int
3981 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3982 {
3983         struct xdr_stream xdr;
3984         struct compound_hdr hdr = {
3985                 .nops   = 2,
3986         };
3987         int status;
3988
3989         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3990         encode_compound_hdr(&xdr, &hdr);
3991         status = encode_putfh(&xdr, args->fh);
3992         if (status)
3993                 goto out;
3994         status = encode_setacl(&xdr, args);
3995 out:
3996         return status;
3997 }
3998 /*
3999  * Decode SETACL response
4000  */
4001 static int
4002 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4003 {
4004         struct xdr_stream xdr;
4005         struct compound_hdr hdr;
4006         int status;
4007
4008         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4009         status = decode_compound_hdr(&xdr, &hdr);
4010         if (status)
4011                 goto out;
4012         status = decode_putfh(&xdr);
4013         if (status)
4014                 goto out;
4015         status = decode_setattr(&xdr, res);
4016 out:
4017         return status;
4018 }
4019
4020 /*
4021  * Decode GETACL response
4022  */
4023 static int
4024 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4025 {
4026         struct xdr_stream xdr;
4027         struct compound_hdr hdr;
4028         int status;
4029
4030         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4031         status = decode_compound_hdr(&xdr, &hdr);
4032         if (status)
4033                 goto out;
4034         status = decode_putfh(&xdr);
4035         if (status)
4036                 goto out;
4037         status = decode_getacl(&xdr, rqstp, acl_len);
4038
4039 out:
4040         return status;
4041 }
4042
4043 /*
4044  * Decode CLOSE response
4045  */
4046 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4047 {
4048         struct xdr_stream xdr;
4049         struct compound_hdr hdr;
4050         int status;
4051
4052         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4053         status = decode_compound_hdr(&xdr, &hdr);
4054         if (status)
4055                 goto out;
4056         status = decode_putfh(&xdr);
4057         if (status)
4058                 goto out;
4059         status = decode_close(&xdr, res);
4060         if (status != 0)
4061                 goto out;
4062         /*
4063          * Note: Server may do delete on close for this file
4064          *      in which case the getattr call will fail with
4065          *      an ESTALE error. Shouldn't be a problem,
4066          *      though, since fattr->valid will remain unset.
4067          */
4068         decode_getfattr(&xdr, res->fattr, res->server);
4069 out:
4070         return status;
4071 }
4072
4073 /*
4074  * Decode OPEN response
4075  */
4076 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4077 {
4078         struct xdr_stream xdr;
4079         struct compound_hdr hdr;
4080         int status;
4081
4082         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4083         status = decode_compound_hdr(&xdr, &hdr);
4084         if (status)
4085                 goto out;
4086         status = decode_putfh(&xdr);
4087         if (status)
4088                 goto out;
4089         status = decode_savefh(&xdr);
4090         if (status)
4091                 goto out;
4092         status = decode_open(&xdr, res);
4093         if (status)
4094                 goto out;
4095         if (decode_getfh(&xdr, &res->fh) != 0)
4096                 goto out;
4097         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4098                 goto out;
4099         if (decode_restorefh(&xdr) != 0)
4100                 goto out;
4101         decode_getfattr(&xdr, res->dir_attr, res->server);
4102 out:
4103         return status;
4104 }
4105
4106 /*
4107  * Decode OPEN_CONFIRM response
4108  */
4109 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4110 {
4111         struct xdr_stream xdr;
4112         struct compound_hdr hdr;
4113         int status;
4114
4115         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4116         status = decode_compound_hdr(&xdr, &hdr);
4117         if (status)
4118                 goto out;
4119         status = decode_putfh(&xdr);
4120         if (status)
4121                 goto out;
4122         status = decode_open_confirm(&xdr, res);
4123 out:
4124         return status;
4125 }
4126
4127 /*
4128  * Decode OPEN response
4129  */
4130 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4131 {
4132         struct xdr_stream xdr;
4133         struct compound_hdr hdr;
4134         int status;
4135
4136         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4137         status = decode_compound_hdr(&xdr, &hdr);
4138         if (status)
4139                 goto out;
4140         status = decode_putfh(&xdr);
4141         if (status)
4142                 goto out;
4143         status = decode_open(&xdr, res);
4144         if (status)
4145                 goto out;
4146         decode_getfattr(&xdr, res->f_attr, res->server);
4147 out:
4148         return status;
4149 }
4150
4151 /*
4152  * Decode SETATTR response
4153  */
4154 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4155 {
4156         struct xdr_stream xdr;
4157         struct compound_hdr hdr;
4158         int status;
4159
4160         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4161         status = decode_compound_hdr(&xdr, &hdr);
4162         if (status)
4163                 goto out;
4164         status = decode_putfh(&xdr);
4165         if (status)
4166                 goto out;
4167         status = decode_setattr(&xdr, res);
4168         if (status)
4169                 goto out;
4170         status = decode_getfattr(&xdr, res->fattr, res->server);
4171         if (status == NFS4ERR_DELAY)
4172                 status = 0;
4173 out:
4174         return status;
4175 }
4176
4177 /*
4178  * Decode LOCK response
4179  */
4180 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4181 {
4182         struct xdr_stream xdr;
4183         struct compound_hdr hdr;
4184         int status;
4185
4186         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4187         status = decode_compound_hdr(&xdr, &hdr);
4188         if (status)
4189                 goto out;
4190         status = decode_putfh(&xdr);
4191         if (status)
4192                 goto out;
4193         status = decode_lock(&xdr, res);
4194 out:
4195         return status;
4196 }
4197
4198 /*
4199  * Decode LOCKT response
4200  */
4201 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4202 {
4203         struct xdr_stream xdr;
4204         struct compound_hdr hdr;
4205         int status;
4206
4207         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4208         status = decode_compound_hdr(&xdr, &hdr);
4209         if (status)
4210                 goto out;
4211         status = decode_putfh(&xdr);
4212         if (status)
4213                 goto out;
4214         status = decode_lockt(&xdr, res);
4215 out:
4216         return status;
4217 }
4218
4219 /*
4220  * Decode LOCKU response
4221  */
4222 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4223 {
4224         struct xdr_stream xdr;
4225         struct compound_hdr hdr;
4226         int status;
4227
4228         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4229         status = decode_compound_hdr(&xdr, &hdr);
4230         if (status)
4231                 goto out;
4232         status = decode_putfh(&xdr);
4233         if (status)
4234                 goto out;
4235         status = decode_locku(&xdr, res);
4236 out:
4237         return status;
4238 }
4239
4240 /*
4241  * Decode READLINK response
4242  */
4243 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4244 {
4245         struct xdr_stream xdr;
4246         struct compound_hdr hdr;
4247         int status;
4248
4249         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4250         status = decode_compound_hdr(&xdr, &hdr);
4251         if (status)
4252                 goto out;
4253         status = decode_putfh(&xdr);
4254         if (status)
4255                 goto out;
4256         status = decode_readlink(&xdr, rqstp);
4257 out:
4258         return status;
4259 }
4260
4261 /*
4262  * Decode READDIR response
4263  */
4264 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4265 {
4266         struct xdr_stream xdr;
4267         struct compound_hdr hdr;
4268         int status;
4269
4270         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4271         status = decode_compound_hdr(&xdr, &hdr);
4272         if (status)
4273                 goto out;
4274         status = decode_putfh(&xdr);
4275         if (status)
4276                 goto out;
4277         status = decode_readdir(&xdr, rqstp, res);
4278 out:
4279         return status;
4280 }
4281
4282 /*
4283  * Decode Read response
4284  */
4285 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4286 {
4287         struct xdr_stream xdr;
4288         struct compound_hdr hdr;
4289         int status;
4290
4291         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4292         status = decode_compound_hdr(&xdr, &hdr);
4293         if (status)
4294                 goto out;
4295         status = decode_putfh(&xdr);
4296         if (status)
4297                 goto out;
4298         status = decode_read(&xdr, rqstp, res);
4299         if (!status)
4300                 status = res->count;
4301 out:
4302         return status;
4303 }
4304
4305 /*
4306  * Decode WRITE response
4307  */
4308 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4309 {
4310         struct xdr_stream xdr;
4311         struct compound_hdr hdr;
4312         int status;
4313
4314         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4315         status = decode_compound_hdr(&xdr, &hdr);
4316         if (status)
4317                 goto out;
4318         status = decode_putfh(&xdr);
4319         if (status)
4320                 goto out;
4321         status = decode_write(&xdr, res);
4322         if (status)
4323                 goto out;
4324         decode_getfattr(&xdr, res->fattr, res->server);
4325         if (!status)
4326                 status = res->count;
4327 out:
4328         return status;
4329 }
4330
4331 /*
4332  * Decode COMMIT response
4333  */
4334 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4335 {
4336         struct xdr_stream xdr;
4337         struct compound_hdr hdr;
4338         int status;
4339
4340         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4341         status = decode_compound_hdr(&xdr, &hdr);
4342         if (status)
4343                 goto out;
4344         status = decode_putfh(&xdr);
4345         if (status)
4346                 goto out;
4347         status = decode_commit(&xdr, res);
4348         if (status)
4349                 goto out;
4350         decode_getfattr(&xdr, res->fattr, res->server);
4351 out:
4352         return status;
4353 }
4354
4355 /*
4356  * FSINFO request
4357  */
4358 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4359 {
4360         struct xdr_stream xdr;
4361         struct compound_hdr hdr;
4362         int status;
4363
4364         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4365         status = decode_compound_hdr(&xdr, &hdr);
4366         if (!status)
4367                 status = decode_putfh(&xdr);
4368         if (!status)
4369                 status = decode_fsinfo(&xdr, fsinfo);
4370         if (!status)
4371                 status = -nfs4_stat_to_errno(hdr.status);
4372         return status;
4373 }
4374
4375 /*
4376  * PATHCONF request
4377  */
4378 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4379 {
4380         struct xdr_stream xdr;
4381         struct compound_hdr hdr;
4382         int status;
4383
4384         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4385         status = decode_compound_hdr(&xdr, &hdr);
4386         if (!status)
4387                 status = decode_putfh(&xdr);
4388         if (!status)
4389                 status = decode_pathconf(&xdr, pathconf);
4390         return status;
4391 }
4392
4393 /*
4394  * STATFS request
4395  */
4396 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4397 {
4398         struct xdr_stream xdr;
4399         struct compound_hdr hdr;
4400         int status;
4401
4402         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4403         status = decode_compound_hdr(&xdr, &hdr);
4404         if (!status)
4405                 status = decode_putfh(&xdr);
4406         if (!status)
4407                 status = decode_statfs(&xdr, fsstat);
4408         return status;
4409 }
4410
4411 /*
4412  * GETATTR_BITMAP request
4413  */
4414 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4415 {
4416         struct xdr_stream xdr;
4417         struct compound_hdr hdr;
4418         int status;
4419
4420         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4421         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4422                 goto out;
4423         if ((status = decode_putfh(&xdr)) != 0)
4424                 goto out;
4425         status = decode_server_caps(&xdr, res);
4426 out:
4427         return status;
4428 }
4429
4430 /*
4431  * Decode RENEW response
4432  */
4433 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4434 {
4435         struct xdr_stream xdr;
4436         struct compound_hdr hdr;
4437         int status;
4438
4439         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4440         status = decode_compound_hdr(&xdr, &hdr);
4441         if (!status)
4442                 status = decode_renew(&xdr);
4443         return status;
4444 }
4445
4446 /*
4447  * a SETCLIENTID request
4448  */
4449 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4450                 struct nfs_client *clp)
4451 {
4452         struct xdr_stream xdr;
4453         struct compound_hdr hdr;
4454         int status;
4455
4456         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4457         status = decode_compound_hdr(&xdr, &hdr);
4458         if (!status)
4459                 status = decode_setclientid(&xdr, clp);
4460         if (!status)
4461                 status = -nfs4_stat_to_errno(hdr.status);
4462         return status;
4463 }
4464
4465 /*
4466  * a SETCLIENTID_CONFIRM request
4467  */
4468 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4469 {
4470         struct xdr_stream xdr;
4471         struct compound_hdr hdr;
4472         int status;
4473
4474         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4475         status = decode_compound_hdr(&xdr, &hdr);
4476         if (!status)
4477                 status = decode_setclientid_confirm(&xdr);
4478         if (!status)
4479                 status = decode_putrootfh(&xdr);
4480         if (!status)
4481                 status = decode_fsinfo(&xdr, fsinfo);
4482         if (!status)
4483                 status = -nfs4_stat_to_errno(hdr.status);
4484         return status;
4485 }
4486
4487 /*
4488  * DELEGRETURN request
4489  */
4490 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4491 {
4492         struct xdr_stream xdr;
4493         struct compound_hdr hdr;
4494         int status;
4495
4496         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4497         status = decode_compound_hdr(&xdr, &hdr);
4498         if (status != 0)
4499                 goto out;
4500         status = decode_putfh(&xdr);
4501         if (status != 0)
4502                 goto out;
4503         status = decode_delegreturn(&xdr);
4504         decode_getfattr(&xdr, res->fattr, res->server);
4505 out:
4506         return status;
4507 }
4508
4509 /*
4510  * FS_LOCATIONS request
4511  */
4512 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4513 {
4514         struct xdr_stream xdr;
4515         struct compound_hdr hdr;
4516         int status;
4517
4518         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4519         status = decode_compound_hdr(&xdr, &hdr);
4520         if (status != 0)
4521                 goto out;
4522         if ((status = decode_putfh(&xdr)) != 0)
4523                 goto out;
4524         if ((status = decode_lookup(&xdr)) != 0)
4525                 goto out;
4526         xdr_enter_page(&xdr, PAGE_SIZE);
4527         status = decode_getfattr(&xdr, &res->fattr, res->server);
4528 out:
4529         return status;
4530 }
4531
4532 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4533 {
4534         uint32_t bitmap[2] = {0};
4535         uint32_t len;
4536
4537         if (!*p++) {
4538                 if (!*p)
4539                         return ERR_PTR(-EAGAIN);
4540                 entry->eof = 1;
4541                 return ERR_PTR(-EBADCOOKIE);
4542         }
4543
4544         entry->prev_cookie = entry->cookie;
4545         p = xdr_decode_hyper(p, &entry->cookie);
4546         entry->len = ntohl(*p++);
4547         entry->name = (const char *) p;
4548         p += XDR_QUADLEN(entry->len);
4549
4550         /*
4551          * In case the server doesn't return an inode number,
4552          * we fake one here.  (We don't use inode number 0,
4553          * since glibc seems to choke on it...)
4554          */
4555         entry->ino = 1;
4556
4557         len = ntohl(*p++);              /* bitmap length */
4558         if (len-- > 0) {
4559                 bitmap[0] = ntohl(*p++);
4560                 if (len-- > 0) {
4561                         bitmap[1] = ntohl(*p++);
4562                         p += len;
4563                 }
4564         }
4565         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4566         if (len > 0) {
4567                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4568                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4569                         /* Ignore the return value of rdattr_error for now */
4570                         p++;
4571                         len--;
4572                 }
4573                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4574                         xdr_decode_hyper(p, &entry->ino);
4575                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4576                         xdr_decode_hyper(p, &entry->ino);
4577                 p += len;
4578         }
4579
4580         entry->eof = !p[0] && p[1];
4581         return p;
4582 }
4583
4584 /*
4585  * We need to translate between nfs status return values and
4586  * the local errno values which may not be the same.
4587  */
4588 static struct {
4589         int stat;
4590         int errno;
4591 } nfs_errtbl[] = {
4592         { NFS4_OK,              0               },
4593         { NFS4ERR_PERM,         EPERM           },
4594         { NFS4ERR_NOENT,        ENOENT          },
4595         { NFS4ERR_IO,           errno_NFSERR_IO },
4596         { NFS4ERR_NXIO,         ENXIO           },
4597         { NFS4ERR_ACCESS,       EACCES          },
4598         { NFS4ERR_EXIST,        EEXIST          },
4599         { NFS4ERR_XDEV,         EXDEV           },
4600         { NFS4ERR_NOTDIR,       ENOTDIR         },
4601         { NFS4ERR_ISDIR,        EISDIR          },
4602         { NFS4ERR_INVAL,        EINVAL          },
4603         { NFS4ERR_FBIG,         EFBIG           },
4604         { NFS4ERR_NOSPC,        ENOSPC          },
4605         { NFS4ERR_ROFS,         EROFS           },
4606         { NFS4ERR_MLINK,        EMLINK          },
4607         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4608         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4609         { NFS4ERR_DQUOT,        EDQUOT          },
4610         { NFS4ERR_STALE,        ESTALE          },
4611         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4612         { NFS4ERR_BADOWNER,     EINVAL          },
4613         { NFS4ERR_BADNAME,      EINVAL          },
4614         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4615         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4616         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4617         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4618         { NFS4ERR_BADTYPE,      EBADTYPE        },
4619         { NFS4ERR_LOCKED,       EAGAIN          },
4620         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4621         { NFS4ERR_SYMLINK,      ELOOP           },
4622         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4623         { NFS4ERR_DEADLOCK,     EDEADLK         },
4624         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4625                                                     * to be handled by a
4626                                                     * middle-layer.
4627                                                     */
4628         { -1,                   EIO             }
4629 };
4630
4631 /*
4632  * Convert an NFS error code to a local one.
4633  * This one is used jointly by NFSv2 and NFSv3.
4634  */
4635 static int
4636 nfs4_stat_to_errno(int stat)
4637 {
4638         int i;
4639         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4640                 if (nfs_errtbl[i].stat == stat)
4641                         return nfs_errtbl[i].errno;
4642         }
4643         if (stat <= 10000 || stat > 10100) {
4644                 /* The server is looney tunes. */
4645                 return ESERVERFAULT;
4646         }
4647         /* If we cannot translate the error, the recovery routines should
4648          * handle it.
4649          * Note: remaining NFSv4 error codes have values > 10000, so should
4650          * not conflict with native Linux error codes.
4651          */
4652         return stat;
4653 }
4654
4655 #define PROC(proc, argtype, restype)                            \
4656 [NFSPROC4_CLNT_##proc] = {                                      \
4657         .p_proc   = NFSPROC4_COMPOUND,                          \
4658         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4659         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4660         .p_arglen = NFS4_##argtype##_sz,                        \
4661         .p_replen = NFS4_##restype##_sz,                        \
4662         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4663         .p_name   = #proc,                                      \
4664     }
4665
4666 struct rpc_procinfo     nfs4_procedures[] = {
4667   PROC(READ,            enc_read,       dec_read),
4668   PROC(WRITE,           enc_write,      dec_write),
4669   PROC(COMMIT,          enc_commit,     dec_commit),
4670   PROC(OPEN,            enc_open,       dec_open),
4671   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4672   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4673   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4674   PROC(CLOSE,           enc_close,      dec_close),
4675   PROC(SETATTR,         enc_setattr,    dec_setattr),
4676   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4677   PROC(RENEW,           enc_renew,      dec_renew),
4678   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4679   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4680   PROC(LOCK,            enc_lock,       dec_lock),
4681   PROC(LOCKT,           enc_lockt,      dec_lockt),
4682   PROC(LOCKU,           enc_locku,      dec_locku),
4683   PROC(ACCESS,          enc_access,     dec_access),
4684   PROC(GETATTR,         enc_getattr,    dec_getattr),
4685   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4686   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4687   PROC(REMOVE,          enc_remove,     dec_remove),
4688   PROC(RENAME,          enc_rename,     dec_rename),
4689   PROC(LINK,            enc_link,       dec_link),
4690   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4691   PROC(CREATE,          enc_create,     dec_create),
4692   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4693   PROC(STATFS,          enc_statfs,     dec_statfs),
4694   PROC(READLINK,        enc_readlink,   dec_readlink),
4695   PROC(READDIR,         enc_readdir,    dec_readdir),
4696   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4697   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4698   PROC(GETACL,          enc_getacl,     dec_getacl),
4699   PROC(SETACL,          enc_setacl,     dec_setacl),
4700   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4701 };
4702
4703 struct rpc_version              nfs_version4 = {
4704         .number                 = 4,
4705         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4706         .procs                  = nfs4_procedures
4707 };
4708
4709 /*
4710  * Local variables:
4711  *  c-basic-offset: 8
4712  * End:
4713  */