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         req->rq_rcv_buf.flags |= XDRBUF_READ;
1860 out:
1861         return status;
1862 }
1863
1864 /*
1865  * Encode an SETATTR request
1866  */
1867 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1868
1869 {
1870         struct xdr_stream xdr;
1871         struct compound_hdr hdr = {
1872                 .nops   = 3,
1873         };
1874         int status;
1875
1876         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1877         encode_compound_hdr(&xdr, &hdr);
1878         status = encode_putfh(&xdr, args->fh);
1879         if(status)
1880                 goto out;
1881         status = encode_setattr(&xdr, args, args->server);
1882         if(status)
1883                 goto out;
1884         status = encode_getfattr(&xdr, args->bitmask);
1885 out:
1886         return status;
1887 }
1888
1889 /*
1890  * Encode a GETACL request
1891  */
1892 static int
1893 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1894                 struct nfs_getaclargs *args)
1895 {
1896         struct xdr_stream xdr;
1897         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1898         struct compound_hdr hdr = {
1899                 .nops   = 2,
1900         };
1901         int replen, status;
1902
1903         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1904         encode_compound_hdr(&xdr, &hdr);
1905         status = encode_putfh(&xdr, args->fh);
1906         if (status)
1907                 goto out;
1908         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1909         /* set up reply buffer: */
1910         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1911         xdr_inline_pages(&req->rq_rcv_buf, replen,
1912                 args->acl_pages, args->acl_pgbase, args->acl_len);
1913 out:
1914         return status;
1915 }
1916
1917 /*
1918  * Encode a WRITE request
1919  */
1920 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1921 {
1922         struct xdr_stream xdr;
1923         struct compound_hdr hdr = {
1924                 .nops = 3,
1925         };
1926         int status;
1927
1928         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1929         encode_compound_hdr(&xdr, &hdr);
1930         status = encode_putfh(&xdr, args->fh);
1931         if (status)
1932                 goto out;
1933         status = encode_write(&xdr, args);
1934         if (status)
1935                 goto out;
1936         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1937         status = encode_getfattr(&xdr, args->bitmask);
1938 out:
1939         return status;
1940 }
1941
1942 /*
1943  *  a COMMIT request
1944  */
1945 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1946 {
1947         struct xdr_stream xdr;
1948         struct compound_hdr hdr = {
1949                 .nops = 3,
1950         };
1951         int status;
1952
1953         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1954         encode_compound_hdr(&xdr, &hdr);
1955         status = encode_putfh(&xdr, args->fh);
1956         if (status)
1957                 goto out;
1958         status = encode_commit(&xdr, args);
1959         if (status)
1960                 goto out;
1961         status = encode_getfattr(&xdr, args->bitmask);
1962 out:
1963         return status;
1964 }
1965
1966 /*
1967  * FSINFO request
1968  */
1969 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1970 {
1971         struct xdr_stream xdr;
1972         struct compound_hdr hdr = {
1973                 .nops   = 2,
1974         };
1975         int status;
1976
1977         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1978         encode_compound_hdr(&xdr, &hdr);
1979         status = encode_putfh(&xdr, args->fh);
1980         if (!status)
1981                 status = encode_fsinfo(&xdr, args->bitmask);
1982         return status;
1983 }
1984
1985 /*
1986  * a PATHCONF request
1987  */
1988 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1989 {
1990         struct xdr_stream xdr;
1991         struct compound_hdr hdr = {
1992                 .nops = 2,
1993         };
1994         int status;
1995
1996         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1997         encode_compound_hdr(&xdr, &hdr);
1998         status = encode_putfh(&xdr, args->fh);
1999         if (!status)
2000                 status = encode_getattr_one(&xdr,
2001                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2002         return status;
2003 }
2004
2005 /*
2006  * a STATFS request
2007  */
2008 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2009 {
2010         struct xdr_stream xdr;
2011         struct compound_hdr hdr = {
2012                 .nops = 2,
2013         };
2014         int status;
2015
2016         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2017         encode_compound_hdr(&xdr, &hdr);
2018         status = encode_putfh(&xdr, args->fh);
2019         if (status == 0)
2020                 status = encode_getattr_two(&xdr,
2021                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2022                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2023         return status;
2024 }
2025
2026 /*
2027  * GETATTR_BITMAP request
2028  */
2029 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2030 {
2031         struct xdr_stream xdr;
2032         struct compound_hdr hdr = {
2033                 .nops = 2,
2034         };
2035         int status;
2036
2037         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2038         encode_compound_hdr(&xdr, &hdr);
2039         status = encode_putfh(&xdr, fhandle);
2040         if (status == 0)
2041                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2042                                 FATTR4_WORD0_LINK_SUPPORT|
2043                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2044                                 FATTR4_WORD0_ACLSUPPORT);
2045         return status;
2046 }
2047
2048 /*
2049  * a RENEW request
2050  */
2051 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2052 {
2053         struct xdr_stream xdr;
2054         struct compound_hdr hdr = {
2055                 .nops   = 1,
2056         };
2057
2058         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2059         encode_compound_hdr(&xdr, &hdr);
2060         return encode_renew(&xdr, clp);
2061 }
2062
2063 /*
2064  * a SETCLIENTID request
2065  */
2066 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2067 {
2068         struct xdr_stream xdr;
2069         struct compound_hdr hdr = {
2070                 .nops   = 1,
2071         };
2072
2073         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2074         encode_compound_hdr(&xdr, &hdr);
2075         return encode_setclientid(&xdr, sc);
2076 }
2077
2078 /*
2079  * a SETCLIENTID_CONFIRM request
2080  */
2081 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2082 {
2083         struct xdr_stream xdr;
2084         struct compound_hdr hdr = {
2085                 .nops   = 3,
2086         };
2087         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2088         int status;
2089
2090         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2091         encode_compound_hdr(&xdr, &hdr);
2092         status = encode_setclientid_confirm(&xdr, clp);
2093         if (!status)
2094                 status = encode_putrootfh(&xdr);
2095         if (!status)
2096                 status = encode_fsinfo(&xdr, lease_bitmap);
2097         return status;
2098 }
2099
2100 /*
2101  * DELEGRETURN request
2102  */
2103 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2104 {
2105         struct xdr_stream xdr;
2106         struct compound_hdr hdr = {
2107                 .nops = 3,
2108         };
2109         int status;
2110
2111         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2112         encode_compound_hdr(&xdr, &hdr);
2113         status = encode_putfh(&xdr, args->fhandle);
2114         if (status != 0)
2115                 goto out;
2116         status = encode_delegreturn(&xdr, args->stateid);
2117         if (status != 0)
2118                 goto out;
2119         status = encode_getfattr(&xdr, args->bitmask);
2120 out:
2121         return status;
2122 }
2123
2124 /*
2125  * Encode FS_LOCATIONS request
2126  */
2127 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2128 {
2129         struct xdr_stream xdr;
2130         struct compound_hdr hdr = {
2131                 .nops = 3,
2132         };
2133         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2134         int replen;
2135         int status;
2136
2137         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2138         encode_compound_hdr(&xdr, &hdr);
2139         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2140                 goto out;
2141         if ((status = encode_lookup(&xdr, args->name)) != 0)
2142                 goto out;
2143         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2144                 goto out;
2145         /* set up reply
2146          *   toplevel_status + OP_PUTFH + status
2147          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2148          */
2149         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2150         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2151                         0, PAGE_SIZE);
2152 out:
2153         return status;
2154 }
2155
2156 /*
2157  * START OF "GENERIC" DECODE ROUTINES.
2158  *   These may look a little ugly since they are imported from a "generic"
2159  * set of XDR encode/decode routines which are intended to be shared by
2160  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2161  *
2162  * If the pain of reading these is too great, it should be a straightforward
2163  * task to translate them into Linux-specific versions which are more
2164  * consistent with the style used in NFSv2/v3...
2165  */
2166 #define READ32(x)         (x) = ntohl(*p++)
2167 #define READ64(x)         do {                  \
2168         (x) = (u64)ntohl(*p++) << 32;           \
2169         (x) |= ntohl(*p++);                     \
2170 } while (0)
2171 #define READTIME(x)       do {                  \
2172         p++;                                    \
2173         (x.tv_sec) = ntohl(*p++);               \
2174         (x.tv_nsec) = ntohl(*p++);              \
2175 } while (0)
2176 #define COPYMEM(x,nbytes) do {                  \
2177         memcpy((x), p, nbytes);                 \
2178         p += XDR_QUADLEN(nbytes);               \
2179 } while (0)
2180
2181 #define READ_BUF(nbytes)  do { \
2182         p = xdr_inline_decode(xdr, nbytes); \
2183         if (unlikely(!p)) { \
2184                 dprintk("nfs: %s: prematurely hit end of receive" \
2185                                 " buffer\n", __FUNCTION__); \
2186                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2187                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2188                 return -EIO; \
2189         } \
2190 } while (0)
2191
2192 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2193 {
2194         __be32 *p;
2195
2196         READ_BUF(4);
2197         READ32(*len);
2198         READ_BUF(*len);
2199         *string = (char *)p;
2200         return 0;
2201 }
2202
2203 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2204 {
2205         __be32 *p;
2206
2207         READ_BUF(8);
2208         READ32(hdr->status);
2209         READ32(hdr->taglen);
2210
2211         READ_BUF(hdr->taglen + 4);
2212         hdr->tag = (char *)p;
2213         p += XDR_QUADLEN(hdr->taglen);
2214         READ32(hdr->nops);
2215         return 0;
2216 }
2217
2218 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2219 {
2220         __be32 *p;
2221         uint32_t opnum;
2222         int32_t nfserr;
2223
2224         READ_BUF(8);
2225         READ32(opnum);
2226         if (opnum != expected) {
2227                 dprintk("nfs: Server returned operation"
2228                         " %d but we issued a request for %d\n",
2229                                 opnum, expected);
2230                 return -EIO;
2231         }
2232         READ32(nfserr);
2233         if (nfserr != NFS_OK)
2234                 return -nfs4_stat_to_errno(nfserr);
2235         return 0;
2236 }
2237
2238 /* Dummy routine */
2239 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2240 {
2241         __be32 *p;
2242         unsigned int strlen;
2243         char *str;
2244
2245         READ_BUF(12);
2246         return decode_opaque_inline(xdr, &strlen, &str);
2247 }
2248
2249 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2250 {
2251         uint32_t bmlen;
2252         __be32 *p;
2253
2254         READ_BUF(4);
2255         READ32(bmlen);
2256
2257         bitmap[0] = bitmap[1] = 0;
2258         READ_BUF((bmlen << 2));
2259         if (bmlen > 0) {
2260                 READ32(bitmap[0]);
2261                 if (bmlen > 1)
2262                         READ32(bitmap[1]);
2263         }
2264         return 0;
2265 }
2266
2267 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2268 {
2269         __be32 *p;
2270
2271         READ_BUF(4);
2272         READ32(*attrlen);
2273         *savep = xdr->p;
2274         return 0;
2275 }
2276
2277 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2278 {
2279         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2280                 decode_attr_bitmap(xdr, bitmask);
2281                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2282         } else
2283                 bitmask[0] = bitmask[1] = 0;
2284         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2285         return 0;
2286 }
2287
2288 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2289 {
2290         __be32 *p;
2291
2292         *type = 0;
2293         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2294                 return -EIO;
2295         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2296                 READ_BUF(4);
2297                 READ32(*type);
2298                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2299                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2300                         return -EIO;
2301                 }
2302                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2303         }
2304         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2305         return 0;
2306 }
2307
2308 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2309 {
2310         __be32 *p;
2311
2312         *change = 0;
2313         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2314                 return -EIO;
2315         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2316                 READ_BUF(8);
2317                 READ64(*change);
2318                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2319         }
2320         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2321                         (unsigned long long)*change);
2322         return 0;
2323 }
2324
2325 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2326 {
2327         __be32 *p;
2328
2329         *size = 0;
2330         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2331                 return -EIO;
2332         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2333                 READ_BUF(8);
2334                 READ64(*size);
2335                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2336         }
2337         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2338         return 0;
2339 }
2340
2341 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2342 {
2343         __be32 *p;
2344
2345         *res = 0;
2346         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2347                 return -EIO;
2348         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2349                 READ_BUF(4);
2350                 READ32(*res);
2351                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2352         }
2353         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2354         return 0;
2355 }
2356
2357 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2358 {
2359         __be32 *p;
2360
2361         *res = 0;
2362         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2363                 return -EIO;
2364         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2365                 READ_BUF(4);
2366                 READ32(*res);
2367                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2368         }
2369         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2370         return 0;
2371 }
2372
2373 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2374 {
2375         __be32 *p;
2376
2377         fsid->major = 0;
2378         fsid->minor = 0;
2379         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2380                 return -EIO;
2381         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2382                 READ_BUF(16);
2383                 READ64(fsid->major);
2384                 READ64(fsid->minor);
2385                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2386         }
2387         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2388                         (unsigned long long)fsid->major,
2389                         (unsigned long long)fsid->minor);
2390         return 0;
2391 }
2392
2393 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2394 {
2395         __be32 *p;
2396
2397         *res = 60;
2398         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2399                 return -EIO;
2400         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2401                 READ_BUF(4);
2402                 READ32(*res);
2403                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2404         }
2405         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2406         return 0;
2407 }
2408
2409 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2410 {
2411         __be32 *p;
2412
2413         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2414         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2415                 return -EIO;
2416         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2417                 READ_BUF(4);
2418                 READ32(*res);
2419                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2420         }
2421         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2422         return 0;
2423 }
2424
2425 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2426 {
2427         __be32 *p;
2428
2429         *fileid = 0;
2430         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2431                 return -EIO;
2432         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2433                 READ_BUF(8);
2434                 READ64(*fileid);
2435                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2436         }
2437         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2438         return 0;
2439 }
2440
2441 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2442 {
2443         __be32 *p;
2444
2445         *fileid = 0;
2446         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2447                 return -EIO;
2448         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2449                 READ_BUF(8);
2450                 READ64(*fileid);
2451                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2452         }
2453         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2454         return 0;
2455 }
2456
2457 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2458 {
2459         __be32 *p;
2460         int status = 0;
2461
2462         *res = 0;
2463         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2464                 return -EIO;
2465         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2466                 READ_BUF(8);
2467                 READ64(*res);
2468                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2469         }
2470         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2471         return status;
2472 }
2473
2474 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2475 {
2476         __be32 *p;
2477         int status = 0;
2478
2479         *res = 0;
2480         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2481                 return -EIO;
2482         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2483                 READ_BUF(8);
2484                 READ64(*res);
2485                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2486         }
2487         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2488         return status;
2489 }
2490
2491 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2492 {
2493         __be32 *p;
2494         int status = 0;
2495
2496         *res = 0;
2497         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2498                 return -EIO;
2499         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2500                 READ_BUF(8);
2501                 READ64(*res);
2502                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2503         }
2504         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2505         return status;
2506 }
2507
2508 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2509 {
2510         int n;
2511         __be32 *p;
2512         int status = 0;
2513
2514         READ_BUF(4);
2515         READ32(n);
2516         if (n < 0)
2517                 goto out_eio;
2518         if (n == 0)
2519                 goto root_path;
2520         dprintk("path ");
2521         path->ncomponents = 0;
2522         while (path->ncomponents < n) {
2523                 struct nfs4_string *component = &path->components[path->ncomponents];
2524                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2525                 if (unlikely(status != 0))
2526                         goto out_eio;
2527                 if (path->ncomponents != n)
2528                         dprintk("/");
2529                 dprintk("%s", component->data);
2530                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2531                         path->ncomponents++;
2532                 else {
2533                         dprintk("cannot parse %d components in path\n", n);
2534                         goto out_eio;
2535                 }
2536         }
2537 out:
2538         dprintk("\n");
2539         return status;
2540 root_path:
2541 /* a root pathname is sent as a zero component4 */
2542         path->ncomponents = 1;
2543         path->components[0].len=0;
2544         path->components[0].data=NULL;
2545         dprintk("path /\n");
2546         goto out;
2547 out_eio:
2548         dprintk(" status %d", status);
2549         status = -EIO;
2550         goto out;
2551 }
2552
2553 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2554 {
2555         int n;
2556         __be32 *p;
2557         int status = -EIO;
2558
2559         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2560                 goto out;
2561         status = 0;
2562         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2563                 goto out;
2564         dprintk("%s: fsroot ", __FUNCTION__);
2565         status = decode_pathname(xdr, &res->fs_path);
2566         if (unlikely(status != 0))
2567                 goto out;
2568         READ_BUF(4);
2569         READ32(n);
2570         if (n <= 0)
2571                 goto out_eio;
2572         res->nlocations = 0;
2573         while (res->nlocations < n) {
2574                 int m;
2575                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2576
2577                 READ_BUF(4);
2578                 READ32(m);
2579                 if (m <= 0)
2580                         goto out_eio;
2581
2582                 loc->nservers = 0;
2583                 dprintk("%s: servers ", __FUNCTION__);
2584                 while (loc->nservers < m) {
2585                         struct nfs4_string *server = &loc->servers[loc->nservers];
2586                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2587                         if (unlikely(status != 0))
2588                                 goto out_eio;
2589                         dprintk("%s ", server->data);
2590                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2591                                 loc->nservers++;
2592                         else {
2593                                 int i;
2594                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2595                                 for (i = loc->nservers; i < m; i++) {
2596                                         unsigned int len;
2597                                         char *data;
2598                                         status = decode_opaque_inline(xdr, &len, &data);
2599                                         if (unlikely(status != 0))
2600                                                 goto out_eio;
2601                                 }
2602                         }
2603                 }
2604                 status = decode_pathname(xdr, &loc->rootpath);
2605                 if (unlikely(status != 0))
2606                         goto out_eio;
2607                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2608                         res->nlocations++;
2609         }
2610 out:
2611         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2612         return status;
2613 out_eio:
2614         status = -EIO;
2615         goto out;
2616 }
2617
2618 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2619 {
2620         __be32 *p;
2621         int status = 0;
2622
2623         *res = 0;
2624         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2625                 return -EIO;
2626         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2627                 READ_BUF(8);
2628                 READ64(*res);
2629                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2630         }
2631         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2632         return status;
2633 }
2634
2635 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2636 {
2637         __be32 *p;
2638         int status = 0;
2639
2640         *maxlink = 1;
2641         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2642                 return -EIO;
2643         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2644                 READ_BUF(4);
2645                 READ32(*maxlink);
2646                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2647         }
2648         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2649         return status;
2650 }
2651
2652 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2653 {
2654         __be32 *p;
2655         int status = 0;
2656
2657         *maxname = 1024;
2658         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2659                 return -EIO;
2660         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2661                 READ_BUF(4);
2662                 READ32(*maxname);
2663                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2664         }
2665         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2666         return status;
2667 }
2668
2669 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2670 {
2671         __be32 *p;
2672         int status = 0;
2673
2674         *res = 1024;
2675         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2676                 return -EIO;
2677         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2678                 uint64_t maxread;
2679                 READ_BUF(8);
2680                 READ64(maxread);
2681                 if (maxread > 0x7FFFFFFF)
2682                         maxread = 0x7FFFFFFF;
2683                 *res = (uint32_t)maxread;
2684                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2685         }
2686         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2687         return status;
2688 }
2689
2690 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2691 {
2692         __be32 *p;
2693         int status = 0;
2694
2695         *res = 1024;
2696         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2697                 return -EIO;
2698         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2699                 uint64_t maxwrite;
2700                 READ_BUF(8);
2701                 READ64(maxwrite);
2702                 if (maxwrite > 0x7FFFFFFF)
2703                         maxwrite = 0x7FFFFFFF;
2704                 *res = (uint32_t)maxwrite;
2705                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2706         }
2707         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2708         return status;
2709 }
2710
2711 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2712 {
2713         __be32 *p;
2714
2715         *mode = 0;
2716         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2717                 return -EIO;
2718         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2719                 READ_BUF(4);
2720                 READ32(*mode);
2721                 *mode &= ~S_IFMT;
2722                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2723         }
2724         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2725         return 0;
2726 }
2727
2728 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2729 {
2730         __be32 *p;
2731
2732         *nlink = 1;
2733         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2734                 return -EIO;
2735         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2736                 READ_BUF(4);
2737                 READ32(*nlink);
2738                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2739         }
2740         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2741         return 0;
2742 }
2743
2744 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2745 {
2746         uint32_t len;
2747         __be32 *p;
2748
2749         *uid = -2;
2750         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2751                 return -EIO;
2752         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2753                 READ_BUF(4);
2754                 READ32(len);
2755                 READ_BUF(len);
2756                 if (len < XDR_MAX_NETOBJ) {
2757                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2758                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2759                                                 __FUNCTION__);
2760                 } else
2761                         dprintk("%s: name too long (%u)!\n",
2762                                         __FUNCTION__, len);
2763                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2764         }
2765         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2766         return 0;
2767 }
2768
2769 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2770 {
2771         uint32_t len;
2772         __be32 *p;
2773
2774         *gid = -2;
2775         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2776                 return -EIO;
2777         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2778                 READ_BUF(4);
2779                 READ32(len);
2780                 READ_BUF(len);
2781                 if (len < XDR_MAX_NETOBJ) {
2782                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2783                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2784                                                 __FUNCTION__);
2785                 } else
2786                         dprintk("%s: name too long (%u)!\n",
2787                                         __FUNCTION__, len);
2788                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2789         }
2790         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2791         return 0;
2792 }
2793
2794 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2795 {
2796         uint32_t major = 0, minor = 0;
2797         __be32 *p;
2798
2799         *rdev = MKDEV(0,0);
2800         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2801                 return -EIO;
2802         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2803                 dev_t tmp;
2804
2805                 READ_BUF(8);
2806                 READ32(major);
2807                 READ32(minor);
2808                 tmp = MKDEV(major, minor);
2809                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2810                         *rdev = tmp;
2811                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2812         }
2813         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2814         return 0;
2815 }
2816
2817 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2818 {
2819         __be32 *p;
2820         int status = 0;
2821
2822         *res = 0;
2823         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2824                 return -EIO;
2825         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2826                 READ_BUF(8);
2827                 READ64(*res);
2828                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2829         }
2830         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2831         return status;
2832 }
2833
2834 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2835 {
2836         __be32 *p;
2837         int status = 0;
2838
2839         *res = 0;
2840         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2841                 return -EIO;
2842         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2843                 READ_BUF(8);
2844                 READ64(*res);
2845                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2846         }
2847         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2848         return status;
2849 }
2850
2851 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2852 {
2853         __be32 *p;
2854         int status = 0;
2855
2856         *res = 0;
2857         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2858                 return -EIO;
2859         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2860                 READ_BUF(8);
2861                 READ64(*res);
2862                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2863         }
2864         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2865         return status;
2866 }
2867
2868 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2869 {
2870         __be32 *p;
2871
2872         *used = 0;
2873         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2874                 return -EIO;
2875         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2876                 READ_BUF(8);
2877                 READ64(*used);
2878                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2879         }
2880         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2881                         (unsigned long long)*used);
2882         return 0;
2883 }
2884
2885 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2886 {
2887         __be32 *p;
2888         uint64_t sec;
2889         uint32_t nsec;
2890
2891         READ_BUF(12);
2892         READ64(sec);
2893         READ32(nsec);
2894         time->tv_sec = (time_t)sec;
2895         time->tv_nsec = (long)nsec;
2896         return 0;
2897 }
2898
2899 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2900 {
2901         int status = 0;
2902
2903         time->tv_sec = 0;
2904         time->tv_nsec = 0;
2905         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2906                 return -EIO;
2907         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2908                 status = decode_attr_time(xdr, time);
2909                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2910         }
2911         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2912         return status;
2913 }
2914
2915 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2916 {
2917         int status = 0;
2918
2919         time->tv_sec = 0;
2920         time->tv_nsec = 0;
2921         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2922                 return -EIO;
2923         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2924                 status = decode_attr_time(xdr, time);
2925                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2926         }
2927         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2928         return status;
2929 }
2930
2931 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2932 {
2933         int status = 0;
2934
2935         time->tv_sec = 0;
2936         time->tv_nsec = 0;
2937         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2938                 return -EIO;
2939         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2940                 status = decode_attr_time(xdr, time);
2941                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2942         }
2943         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2944         return status;
2945 }
2946
2947 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2948 {
2949         unsigned int attrwords = XDR_QUADLEN(attrlen);
2950         unsigned int nwords = xdr->p - savep;
2951
2952         if (unlikely(attrwords != nwords)) {
2953                 dprintk("%s: server returned incorrect attribute length: "
2954                         "%u %c %u\n",
2955                                 __FUNCTION__,
2956                                 attrwords << 2,
2957                                 (attrwords < nwords) ? '<' : '>',
2958                                 nwords << 2);
2959                 return -EIO;
2960         }
2961         return 0;
2962 }
2963
2964 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2965 {
2966         __be32 *p;
2967
2968         READ_BUF(20);
2969         READ32(cinfo->atomic);
2970         READ64(cinfo->before);
2971         READ64(cinfo->after);
2972         return 0;
2973 }
2974
2975 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2976 {
2977         __be32 *p;
2978         uint32_t supp, acc;
2979         int status;
2980
2981         status = decode_op_hdr(xdr, OP_ACCESS);
2982         if (status)
2983                 return status;
2984         READ_BUF(8);
2985         READ32(supp);
2986         READ32(acc);
2987         access->supported = supp;
2988         access->access = acc;
2989         return 0;
2990 }
2991
2992 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2993 {
2994         __be32 *p;
2995         int status;
2996
2997         status = decode_op_hdr(xdr, OP_CLOSE);
2998         if (status)
2999                 return status;
3000         READ_BUF(NFS4_STATEID_SIZE);
3001         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3002         return 0;
3003 }
3004
3005 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3006 {
3007         __be32 *p;
3008         int status;
3009
3010         status = decode_op_hdr(xdr, OP_COMMIT);
3011         if (status)
3012                 return status;
3013         READ_BUF(8);
3014         COPYMEM(res->verf->verifier, 8);
3015         return 0;
3016 }
3017
3018 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3019 {
3020         __be32 *p;
3021         uint32_t bmlen;
3022         int status;
3023
3024         status = decode_op_hdr(xdr, OP_CREATE);
3025         if (status)
3026                 return status;
3027         if ((status = decode_change_info(xdr, cinfo)))
3028                 return status;
3029         READ_BUF(4);
3030         READ32(bmlen);
3031         READ_BUF(bmlen << 2);
3032         return 0;
3033 }
3034
3035 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3036 {
3037         __be32 *savep;
3038         uint32_t attrlen,
3039                  bitmap[2] = {0};
3040         int status;
3041
3042         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3043                 goto xdr_error;
3044         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3045                 goto xdr_error;
3046         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3047                 goto xdr_error;
3048         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3049                 goto xdr_error;
3050         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3051                 goto xdr_error;
3052         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3053                 goto xdr_error;
3054         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3055                 goto xdr_error;
3056         status = verify_attr_len(xdr, savep, attrlen);
3057 xdr_error:
3058         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3059         return status;
3060 }
3061
3062 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3063 {
3064         __be32 *savep;
3065         uint32_t attrlen,
3066                  bitmap[2] = {0};
3067         int status;
3068
3069         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3070                 goto xdr_error;
3071         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3072                 goto xdr_error;
3073         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3074                 goto xdr_error;
3075
3076         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3077                 goto xdr_error;
3078         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3079                 goto xdr_error;
3080         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3081                 goto xdr_error;
3082         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3083                 goto xdr_error;
3084         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3085                 goto xdr_error;
3086         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3087                 goto xdr_error;
3088
3089         status = verify_attr_len(xdr, savep, attrlen);
3090 xdr_error:
3091         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3092         return status;
3093 }
3094
3095 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3096 {
3097         __be32 *savep;
3098         uint32_t attrlen,
3099                  bitmap[2] = {0};
3100         int status;
3101
3102         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3103                 goto xdr_error;
3104         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3105                 goto xdr_error;
3106         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3107                 goto xdr_error;
3108
3109         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3110                 goto xdr_error;
3111         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3112                 goto xdr_error;
3113
3114         status = verify_attr_len(xdr, savep, attrlen);
3115 xdr_error:
3116         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3117         return status;
3118 }
3119
3120 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3121 {
3122         __be32 *savep;
3123         uint32_t attrlen,
3124                  bitmap[2] = {0},
3125                  type;
3126         int status, fmode = 0;
3127         uint64_t fileid;
3128
3129         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3130                 goto xdr_error;
3131         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3132                 goto xdr_error;
3133
3134         fattr->bitmap[0] = bitmap[0];
3135         fattr->bitmap[1] = bitmap[1];
3136
3137         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3138                 goto xdr_error;
3139
3140
3141         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3142                 goto xdr_error;
3143         fattr->type = nfs_type2fmt[type].nfs2type;
3144         fmode = nfs_type2fmt[type].mode;
3145
3146         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3147                 goto xdr_error;
3148         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3149                 goto xdr_error;
3150         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3151                 goto xdr_error;
3152         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3153                 goto xdr_error;
3154         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3155                                                 struct nfs4_fs_locations,
3156                                                 fattr))) != 0)
3157                 goto xdr_error;
3158         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3159                 goto xdr_error;
3160         fattr->mode |= fmode;
3161         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3162                 goto xdr_error;
3163         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3164                 goto xdr_error;
3165         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3166                 goto xdr_error;
3167         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3168                 goto xdr_error;
3169         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3170                 goto xdr_error;
3171         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3172                 goto xdr_error;
3173         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3174                 goto xdr_error;
3175         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3176                 goto xdr_error;
3177         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3178                 goto xdr_error;
3179         if (fattr->fileid == 0 && fileid != 0)
3180                 fattr->fileid = fileid;
3181         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3182                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3183 xdr_error:
3184         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3185         return status;
3186 }
3187
3188
3189 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3190 {
3191         __be32 *savep;
3192         uint32_t attrlen, bitmap[2];
3193         int status;
3194
3195         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3196                 goto xdr_error;
3197         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3198                 goto xdr_error;
3199         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3200                 goto xdr_error;
3201
3202         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3203
3204         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3205                 goto xdr_error;
3206         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3207                 goto xdr_error;
3208         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3209                 goto xdr_error;
3210         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3211         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3212                 goto xdr_error;
3213         fsinfo->wtpref = fsinfo->wtmax;
3214
3215         status = verify_attr_len(xdr, savep, attrlen);
3216 xdr_error:
3217         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3218         return status;
3219 }
3220
3221 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3222 {
3223         __be32 *p;
3224         uint32_t len;
3225         int status;
3226
3227         /* Zero handle first to allow comparisons */
3228         memset(fh, 0, sizeof(*fh));
3229
3230         status = decode_op_hdr(xdr, OP_GETFH);
3231         if (status)
3232                 return status;
3233
3234         READ_BUF(4);
3235         READ32(len);
3236         if (len > NFS4_FHSIZE)
3237                 return -EIO;
3238         fh->size = len;
3239         READ_BUF(len);
3240         COPYMEM(fh->data, len);
3241         return 0;
3242 }
3243
3244 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3245 {
3246         int status;
3247
3248         status = decode_op_hdr(xdr, OP_LINK);
3249         if (status)
3250                 return status;
3251         return decode_change_info(xdr, cinfo);
3252 }
3253
3254 /*
3255  * We create the owner, so we know a proper owner.id length is 4.
3256  */
3257 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3258 {
3259         uint64_t offset, length, clientid;
3260         __be32 *p;
3261         uint32_t namelen, type;
3262
3263         READ_BUF(32);
3264         READ64(offset);
3265         READ64(length);
3266         READ32(type);
3267         if (fl != NULL) {
3268                 fl->fl_start = (loff_t)offset;
3269                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3270                 if (length == ~(uint64_t)0)
3271                         fl->fl_end = OFFSET_MAX;
3272                 fl->fl_type = F_WRLCK;
3273                 if (type & 1)
3274                         fl->fl_type = F_RDLCK;
3275                 fl->fl_pid = 0;
3276         }
3277         READ64(clientid);
3278         READ32(namelen);
3279         READ_BUF(namelen);
3280         return -NFS4ERR_DENIED;
3281 }
3282
3283 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3284 {
3285         __be32 *p;
3286         int status;
3287
3288         status = decode_op_hdr(xdr, OP_LOCK);
3289         if (status == 0) {
3290                 READ_BUF(NFS4_STATEID_SIZE);
3291                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3292         } else if (status == -NFS4ERR_DENIED)
3293                 return decode_lock_denied(xdr, NULL);
3294         return status;
3295 }
3296
3297 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3298 {
3299         int status;
3300         status = decode_op_hdr(xdr, OP_LOCKT);
3301         if (status == -NFS4ERR_DENIED)
3302                 return decode_lock_denied(xdr, res->denied);
3303         return status;
3304 }
3305
3306 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3307 {
3308         __be32 *p;
3309         int status;
3310
3311         status = decode_op_hdr(xdr, OP_LOCKU);
3312         if (status == 0) {
3313                 READ_BUF(NFS4_STATEID_SIZE);
3314                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3315         }
3316         return status;
3317 }
3318
3319 static int decode_lookup(struct xdr_stream *xdr)
3320 {
3321         return decode_op_hdr(xdr, OP_LOOKUP);
3322 }
3323
3324 /* This is too sick! */
3325 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3326 {
3327         __be32 *p;
3328         uint32_t limit_type, nblocks, blocksize;
3329
3330         READ_BUF(12);
3331         READ32(limit_type);
3332         switch (limit_type) {
3333                 case 1:
3334                         READ64(*maxsize);
3335                         break;
3336                 case 2:
3337                         READ32(nblocks);
3338                         READ32(blocksize);
3339                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3340         }
3341         return 0;
3342 }
3343
3344 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3345 {
3346         __be32 *p;
3347         uint32_t delegation_type;
3348
3349         READ_BUF(4);
3350         READ32(delegation_type);
3351         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3352                 res->delegation_type = 0;
3353                 return 0;
3354         }
3355         READ_BUF(NFS4_STATEID_SIZE+4);
3356         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3357         READ32(res->do_recall);
3358         switch (delegation_type) {
3359                 case NFS4_OPEN_DELEGATE_READ:
3360                         res->delegation_type = FMODE_READ;
3361                         break;
3362                 case NFS4_OPEN_DELEGATE_WRITE:
3363                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3364                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3365                                 return -EIO;
3366         }
3367         return decode_ace(xdr, NULL, res->server->nfs_client);
3368 }
3369
3370 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3371 {
3372         __be32 *p;
3373         uint32_t savewords, bmlen, i;
3374         int status;
3375
3376         status = decode_op_hdr(xdr, OP_OPEN);
3377         if (status)
3378                 return status;
3379         READ_BUF(NFS4_STATEID_SIZE);
3380         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3381
3382         decode_change_info(xdr, &res->cinfo);
3383
3384         READ_BUF(8);
3385         READ32(res->rflags);
3386         READ32(bmlen);
3387         if (bmlen > 10)
3388                 goto xdr_error;
3389
3390         READ_BUF(bmlen << 2);
3391         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3392         for (i = 0; i < savewords; ++i)
3393                 READ32(res->attrset[i]);
3394         for (; i < NFS4_BITMAP_SIZE; i++)
3395                 res->attrset[i] = 0;
3396
3397         return decode_delegation(xdr, res);
3398 xdr_error:
3399         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3400         return -EIO;
3401 }
3402
3403 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3404 {
3405         __be32 *p;
3406         int status;
3407
3408         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3409         if (status)
3410                 return status;
3411         READ_BUF(NFS4_STATEID_SIZE);
3412         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3413         return 0;
3414 }
3415
3416 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3417 {
3418         __be32 *p;
3419         int status;
3420
3421         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3422         if (status)
3423                 return status;
3424         READ_BUF(NFS4_STATEID_SIZE);
3425         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3426         return 0;
3427 }
3428
3429 static int decode_putfh(struct xdr_stream *xdr)
3430 {
3431         return decode_op_hdr(xdr, OP_PUTFH);
3432 }
3433
3434 static int decode_putrootfh(struct xdr_stream *xdr)
3435 {
3436         return decode_op_hdr(xdr, OP_PUTROOTFH);
3437 }
3438
3439 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3440 {
3441         struct kvec *iov = req->rq_rcv_buf.head;
3442         __be32 *p;
3443         uint32_t count, eof, recvd, hdrlen;
3444         int status;
3445
3446         status = decode_op_hdr(xdr, OP_READ);
3447         if (status)
3448                 return status;
3449         READ_BUF(8);
3450         READ32(eof);
3451         READ32(count);
3452         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3453         recvd = req->rq_rcv_buf.len - hdrlen;
3454         if (count > recvd) {
3455                 dprintk("NFS: server cheating in read reply: "
3456                                 "count %u > recvd %u\n", count, recvd);
3457                 count = recvd;
3458                 eof = 0;
3459         }
3460         xdr_read_pages(xdr, count);
3461         res->eof = eof;
3462         res->count = count;
3463         return 0;
3464 }
3465
3466 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3467 {
3468         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3469         struct page     *page = *rcvbuf->pages;
3470         struct kvec     *iov = rcvbuf->head;
3471         unsigned int    nr, pglen = rcvbuf->page_len;
3472         __be32          *end, *entry, *p, *kaddr;
3473         uint32_t        len, attrlen, xlen;
3474         int             hdrlen, recvd, status;
3475
3476         status = decode_op_hdr(xdr, OP_READDIR);
3477         if (status)
3478                 return status;
3479         READ_BUF(8);
3480         COPYMEM(readdir->verifier.data, 8);
3481         dprintk("%s: verifier = 0x%x%x\n",
3482                         __FUNCTION__,
3483                         ((u32 *)readdir->verifier.data)[0],
3484                         ((u32 *)readdir->verifier.data)[1]);
3485
3486
3487         hdrlen = (char *) p - (char *) iov->iov_base;
3488         recvd = rcvbuf->len - hdrlen;
3489         if (pglen > recvd)
3490                 pglen = recvd;
3491         xdr_read_pages(xdr, pglen);
3492
3493         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3494         kaddr = p = kmap_atomic(page, KM_USER0);
3495         end = p + ((pglen + readdir->pgbase) >> 2);
3496         entry = p;
3497         for (nr = 0; *p++; nr++) {
3498                 if (end - p < 3)
3499                         goto short_pkt;
3500                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3501                 p += 2;                 /* cookie */
3502                 len = ntohl(*p++);      /* filename length */
3503                 if (len > NFS4_MAXNAMLEN) {
3504                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3505                                         len);
3506                         goto err_unmap;
3507                 }
3508                 xlen = XDR_QUADLEN(len);
3509                 if (end - p < xlen + 1)
3510                         goto short_pkt;
3511                 dprintk("filename = %*s\n", len, (char *)p);
3512                 p += xlen;
3513                 len = ntohl(*p++);      /* bitmap length */
3514                 if (end - p < len + 1)
3515                         goto short_pkt;
3516                 p += len;
3517                 attrlen = XDR_QUADLEN(ntohl(*p++));
3518                 if (end - p < attrlen + 2)
3519                         goto short_pkt;
3520                 p += attrlen;           /* attributes */
3521                 entry = p;
3522         }
3523         if (!nr && (entry[0] != 0 || entry[1] == 0))
3524                 goto short_pkt;
3525 out:
3526         kunmap_atomic(kaddr, KM_USER0);
3527         return 0;
3528 short_pkt:
3529         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3530         entry[0] = entry[1] = 0;
3531         /* truncate listing ? */
3532         if (!nr) {
3533                 dprintk("NFS: readdir reply truncated!\n");
3534                 entry[1] = 1;
3535         }
3536         goto out;
3537 err_unmap:
3538         kunmap_atomic(kaddr, KM_USER0);
3539         return -errno_NFSERR_IO;
3540 }
3541
3542 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3543 {
3544         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3545         struct kvec *iov = rcvbuf->head;
3546         int hdrlen, len, recvd;
3547         __be32 *p;
3548         char *kaddr;
3549         int status;
3550
3551         status = decode_op_hdr(xdr, OP_READLINK);
3552         if (status)
3553                 return status;
3554
3555         /* Convert length of symlink */
3556         READ_BUF(4);
3557         READ32(len);
3558         if (len >= rcvbuf->page_len || len <= 0) {
3559                 dprintk("nfs: server returned giant symlink!\n");
3560                 return -ENAMETOOLONG;
3561         }
3562         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3563         recvd = req->rq_rcv_buf.len - hdrlen;
3564         if (recvd < len) {
3565                 dprintk("NFS: server cheating in readlink reply: "
3566                                 "count %u > recvd %u\n", len, recvd);
3567                 return -EIO;
3568         }
3569         xdr_read_pages(xdr, len);
3570         /*
3571          * The XDR encode routine has set things up so that
3572          * the link text will be copied directly into the
3573          * buffer.  We just have to do overflow-checking,
3574          * and and null-terminate the text (the VFS expects
3575          * null-termination).
3576          */
3577         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3578         kaddr[len+rcvbuf->page_base] = '\0';
3579         kunmap_atomic(kaddr, KM_USER0);
3580         return 0;
3581 }
3582
3583 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3584 {
3585         int status;
3586
3587         status = decode_op_hdr(xdr, OP_REMOVE);
3588         if (status)
3589                 goto out;
3590         status = decode_change_info(xdr, cinfo);
3591 out:
3592         return status;
3593 }
3594
3595 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3596               struct nfs4_change_info *new_cinfo)
3597 {
3598         int status;
3599
3600         status = decode_op_hdr(xdr, OP_RENAME);
3601         if (status)
3602                 goto out;
3603         if ((status = decode_change_info(xdr, old_cinfo)))
3604                 goto out;
3605         status = decode_change_info(xdr, new_cinfo);
3606 out:
3607         return status;
3608 }
3609
3610 static int decode_renew(struct xdr_stream *xdr)
3611 {
3612         return decode_op_hdr(xdr, OP_RENEW);
3613 }
3614
3615 static int
3616 decode_restorefh(struct xdr_stream *xdr)
3617 {
3618         return decode_op_hdr(xdr, OP_RESTOREFH);
3619 }
3620
3621 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3622                 size_t *acl_len)
3623 {
3624         __be32 *savep;
3625         uint32_t attrlen,
3626                  bitmap[2] = {0};
3627         struct kvec *iov = req->rq_rcv_buf.head;
3628         int status;
3629
3630         *acl_len = 0;
3631         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3632                 goto out;
3633         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3634                 goto out;
3635         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3636                 goto out;
3637
3638         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3639                 return -EIO;
3640         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3641                 int hdrlen, recvd;
3642
3643                 /* We ignore &savep and don't do consistency checks on
3644                  * the attr length.  Let userspace figure it out.... */
3645                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3646                 recvd = req->rq_rcv_buf.len - hdrlen;
3647                 if (attrlen > recvd) {
3648                         dprintk("NFS: server cheating in getattr"
3649                                         " acl reply: attrlen %u > recvd %u\n",
3650                                         attrlen, recvd);
3651                         return -EINVAL;
3652                 }
3653                 xdr_read_pages(xdr, attrlen);
3654                 *acl_len = attrlen;
3655         } else
3656                 status = -EOPNOTSUPP;
3657
3658 out:
3659         return status;
3660 }
3661
3662 static int
3663 decode_savefh(struct xdr_stream *xdr)
3664 {
3665         return decode_op_hdr(xdr, OP_SAVEFH);
3666 }
3667
3668 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3669 {
3670         __be32 *p;
3671         uint32_t bmlen;
3672         int status;
3673
3674
3675         status = decode_op_hdr(xdr, OP_SETATTR);
3676         if (status)
3677                 return status;
3678         READ_BUF(4);
3679         READ32(bmlen);
3680         READ_BUF(bmlen << 2);
3681         return 0;
3682 }
3683
3684 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3685 {
3686         __be32 *p;
3687         uint32_t opnum;
3688         int32_t nfserr;
3689
3690         READ_BUF(8);
3691         READ32(opnum);
3692         if (opnum != OP_SETCLIENTID) {
3693                 dprintk("nfs: decode_setclientid: Server returned operation"
3694                                 " %d\n", opnum);
3695                 return -EIO;
3696         }
3697         READ32(nfserr);
3698         if (nfserr == NFS_OK) {
3699                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3700                 READ64(clp->cl_clientid);
3701                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3702         } else if (nfserr == NFSERR_CLID_INUSE) {
3703                 uint32_t len;
3704
3705                 /* skip netid string */
3706                 READ_BUF(4);
3707                 READ32(len);
3708                 READ_BUF(len);
3709
3710                 /* skip uaddr string */
3711                 READ_BUF(4);
3712                 READ32(len);
3713                 READ_BUF(len);
3714                 return -NFSERR_CLID_INUSE;
3715         } else
3716                 return -nfs4_stat_to_errno(nfserr);
3717
3718         return 0;
3719 }
3720
3721 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3722 {
3723         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3724 }
3725
3726 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3727 {
3728         __be32 *p;
3729         int status;
3730
3731         status = decode_op_hdr(xdr, OP_WRITE);
3732         if (status)
3733                 return status;
3734
3735         READ_BUF(16);
3736         READ32(res->count);
3737         READ32(res->verf->committed);
3738         COPYMEM(res->verf->verifier, 8);
3739         return 0;
3740 }
3741
3742 static int decode_delegreturn(struct xdr_stream *xdr)
3743 {
3744         return decode_op_hdr(xdr, OP_DELEGRETURN);
3745 }
3746
3747 /*
3748  * Decode OPEN_DOWNGRADE response
3749  */
3750 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3751 {
3752         struct xdr_stream xdr;
3753         struct compound_hdr hdr;
3754         int status;
3755
3756         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3757         status = decode_compound_hdr(&xdr, &hdr);
3758         if (status)
3759                 goto out;
3760         status = decode_putfh(&xdr);
3761         if (status)
3762                 goto out;
3763         status = decode_open_downgrade(&xdr, res);
3764         if (status != 0)
3765                 goto out;
3766         decode_getfattr(&xdr, res->fattr, res->server);
3767 out:
3768         return status;
3769 }
3770
3771 /*
3772  * END OF "GENERIC" DECODE ROUTINES.
3773  */
3774
3775 /*
3776  * Decode ACCESS response
3777  */
3778 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3779 {
3780         struct xdr_stream xdr;
3781         struct compound_hdr hdr;
3782         int status;
3783
3784         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3785         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3786                 goto out;
3787         if ((status = decode_putfh(&xdr)) == 0)
3788                 status = decode_access(&xdr, res);
3789 out:
3790         return status;
3791 }
3792
3793 /*
3794  * Decode LOOKUP response
3795  */
3796 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3797 {
3798         struct xdr_stream xdr;
3799         struct compound_hdr hdr;
3800         int status;
3801
3802         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3803         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3804                 goto out;
3805         if ((status = decode_putfh(&xdr)) != 0)
3806                 goto out;
3807         if ((status = decode_lookup(&xdr)) != 0)
3808                 goto out;
3809         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3810                 goto out;
3811         status = decode_getfattr(&xdr, res->fattr, res->server);
3812 out:
3813         return status;
3814 }
3815
3816 /*
3817  * Decode LOOKUP_ROOT response
3818  */
3819 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3820 {
3821         struct xdr_stream xdr;
3822         struct compound_hdr hdr;
3823         int status;
3824
3825         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3826         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3827                 goto out;
3828         if ((status = decode_putrootfh(&xdr)) != 0)
3829                 goto out;
3830         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3831                 status = decode_getfattr(&xdr, res->fattr, res->server);
3832 out:
3833         return status;
3834 }
3835
3836 /*
3837  * Decode REMOVE response
3838  */
3839 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3840 {
3841         struct xdr_stream xdr;
3842         struct compound_hdr hdr;
3843         int status;
3844
3845         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3846         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3847                 goto out;
3848         if ((status = decode_putfh(&xdr)) != 0)
3849                 goto out;
3850         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3851                 goto out;
3852         decode_getfattr(&xdr, &res->dir_attr, res->server);
3853 out:
3854         return status;
3855 }
3856
3857 /*
3858  * Decode RENAME response
3859  */
3860 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3861 {
3862         struct xdr_stream xdr;
3863         struct compound_hdr hdr;
3864         int status;
3865
3866         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3867         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3868                 goto out;
3869         if ((status = decode_putfh(&xdr)) != 0)
3870                 goto out;
3871         if ((status = decode_savefh(&xdr)) != 0)
3872                 goto out;
3873         if ((status = decode_putfh(&xdr)) != 0)
3874                 goto out;
3875         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3876                 goto out;
3877         /* Current FH is target directory */
3878         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3879                 goto out;
3880         if ((status = decode_restorefh(&xdr)) != 0)
3881                 goto out;
3882         decode_getfattr(&xdr, res->old_fattr, res->server);
3883 out:
3884         return status;
3885 }
3886
3887 /*
3888  * Decode LINK response
3889  */
3890 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3891 {
3892         struct xdr_stream xdr;
3893         struct compound_hdr hdr;
3894         int status;
3895
3896         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3897         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3898                 goto out;
3899         if ((status = decode_putfh(&xdr)) != 0)
3900                 goto out;
3901         if ((status = decode_savefh(&xdr)) != 0)
3902                 goto out;
3903         if ((status = decode_putfh(&xdr)) != 0)
3904                 goto out;
3905         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3906                 goto out;
3907         /*
3908          * Note order: OP_LINK leaves the directory as the current
3909          *             filehandle.
3910          */
3911         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3912                 goto out;
3913         if ((status = decode_restorefh(&xdr)) != 0)
3914                 goto out;
3915         decode_getfattr(&xdr, res->fattr, res->server);
3916 out:
3917         return status;
3918 }
3919
3920 /*
3921  * Decode CREATE response
3922  */
3923 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3924 {
3925         struct xdr_stream xdr;
3926         struct compound_hdr hdr;
3927         int status;
3928
3929         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3930         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3931                 goto out;
3932         if ((status = decode_putfh(&xdr)) != 0)
3933                 goto out;
3934         if ((status = decode_savefh(&xdr)) != 0)
3935                 goto out;
3936         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3937                 goto out;
3938         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3939                 goto out;
3940         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3941                 goto out;
3942         if ((status = decode_restorefh(&xdr)) != 0)
3943                 goto out;
3944         decode_getfattr(&xdr, res->dir_fattr, res->server);
3945 out:
3946         return status;
3947 }
3948
3949 /*
3950  * Decode SYMLINK response
3951  */
3952 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3953 {
3954         return nfs4_xdr_dec_create(rqstp, p, res);
3955 }
3956
3957 /*
3958  * Decode GETATTR response
3959  */
3960 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3961 {
3962         struct xdr_stream xdr;
3963         struct compound_hdr hdr;
3964         int status;
3965
3966         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3967         status = decode_compound_hdr(&xdr, &hdr);
3968         if (status)
3969                 goto out;
3970         status = decode_putfh(&xdr);
3971         if (status)
3972                 goto out;
3973         status = decode_getfattr(&xdr, res->fattr, res->server);
3974 out:
3975         return status;
3976
3977 }
3978
3979 /*
3980  * Encode an SETACL request
3981  */
3982 static int
3983 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3984 {
3985         struct xdr_stream xdr;
3986         struct compound_hdr hdr = {
3987                 .nops   = 2,
3988         };
3989         int status;
3990
3991         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3992         encode_compound_hdr(&xdr, &hdr);
3993         status = encode_putfh(&xdr, args->fh);
3994         if (status)
3995                 goto out;
3996         status = encode_setacl(&xdr, args);
3997 out:
3998         return status;
3999 }
4000 /*
4001  * Decode SETACL response
4002  */
4003 static int
4004 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4005 {
4006         struct xdr_stream xdr;
4007         struct compound_hdr hdr;
4008         int status;
4009
4010         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4011         status = decode_compound_hdr(&xdr, &hdr);
4012         if (status)
4013                 goto out;
4014         status = decode_putfh(&xdr);
4015         if (status)
4016                 goto out;
4017         status = decode_setattr(&xdr, res);
4018 out:
4019         return status;
4020 }
4021
4022 /*
4023  * Decode GETACL response
4024  */
4025 static int
4026 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4027 {
4028         struct xdr_stream xdr;
4029         struct compound_hdr hdr;
4030         int status;
4031
4032         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4033         status = decode_compound_hdr(&xdr, &hdr);
4034         if (status)
4035                 goto out;
4036         status = decode_putfh(&xdr);
4037         if (status)
4038                 goto out;
4039         status = decode_getacl(&xdr, rqstp, acl_len);
4040
4041 out:
4042         return status;
4043 }
4044
4045 /*
4046  * Decode CLOSE response
4047  */
4048 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4049 {
4050         struct xdr_stream xdr;
4051         struct compound_hdr hdr;
4052         int status;
4053
4054         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4055         status = decode_compound_hdr(&xdr, &hdr);
4056         if (status)
4057                 goto out;
4058         status = decode_putfh(&xdr);
4059         if (status)
4060                 goto out;
4061         status = decode_close(&xdr, res);
4062         if (status != 0)
4063                 goto out;
4064         /*
4065          * Note: Server may do delete on close for this file
4066          *      in which case the getattr call will fail with
4067          *      an ESTALE error. Shouldn't be a problem,
4068          *      though, since fattr->valid will remain unset.
4069          */
4070         decode_getfattr(&xdr, res->fattr, res->server);
4071 out:
4072         return status;
4073 }
4074
4075 /*
4076  * Decode OPEN response
4077  */
4078 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4079 {
4080         struct xdr_stream xdr;
4081         struct compound_hdr hdr;
4082         int status;
4083
4084         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4085         status = decode_compound_hdr(&xdr, &hdr);
4086         if (status)
4087                 goto out;
4088         status = decode_putfh(&xdr);
4089         if (status)
4090                 goto out;
4091         status = decode_savefh(&xdr);
4092         if (status)
4093                 goto out;
4094         status = decode_open(&xdr, res);
4095         if (status)
4096                 goto out;
4097         if (decode_getfh(&xdr, &res->fh) != 0)
4098                 goto out;
4099         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4100                 goto out;
4101         if (decode_restorefh(&xdr) != 0)
4102                 goto out;
4103         decode_getfattr(&xdr, res->dir_attr, res->server);
4104 out:
4105         return status;
4106 }
4107
4108 /*
4109  * Decode OPEN_CONFIRM response
4110  */
4111 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4112 {
4113         struct xdr_stream xdr;
4114         struct compound_hdr hdr;
4115         int status;
4116
4117         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4118         status = decode_compound_hdr(&xdr, &hdr);
4119         if (status)
4120                 goto out;
4121         status = decode_putfh(&xdr);
4122         if (status)
4123                 goto out;
4124         status = decode_open_confirm(&xdr, res);
4125 out:
4126         return status;
4127 }
4128
4129 /*
4130  * Decode OPEN response
4131  */
4132 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4133 {
4134         struct xdr_stream xdr;
4135         struct compound_hdr hdr;
4136         int status;
4137
4138         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4139         status = decode_compound_hdr(&xdr, &hdr);
4140         if (status)
4141                 goto out;
4142         status = decode_putfh(&xdr);
4143         if (status)
4144                 goto out;
4145         status = decode_open(&xdr, res);
4146         if (status)
4147                 goto out;
4148         decode_getfattr(&xdr, res->f_attr, res->server);
4149 out:
4150         return status;
4151 }
4152
4153 /*
4154  * Decode SETATTR response
4155  */
4156 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4157 {
4158         struct xdr_stream xdr;
4159         struct compound_hdr hdr;
4160         int status;
4161
4162         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4163         status = decode_compound_hdr(&xdr, &hdr);
4164         if (status)
4165                 goto out;
4166         status = decode_putfh(&xdr);
4167         if (status)
4168                 goto out;
4169         status = decode_setattr(&xdr, res);
4170         if (status)
4171                 goto out;
4172         status = decode_getfattr(&xdr, res->fattr, res->server);
4173         if (status == NFS4ERR_DELAY)
4174                 status = 0;
4175 out:
4176         return status;
4177 }
4178
4179 /*
4180  * Decode LOCK response
4181  */
4182 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4183 {
4184         struct xdr_stream xdr;
4185         struct compound_hdr hdr;
4186         int status;
4187
4188         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4189         status = decode_compound_hdr(&xdr, &hdr);
4190         if (status)
4191                 goto out;
4192         status = decode_putfh(&xdr);
4193         if (status)
4194                 goto out;
4195         status = decode_lock(&xdr, res);
4196 out:
4197         return status;
4198 }
4199
4200 /*
4201  * Decode LOCKT response
4202  */
4203 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4204 {
4205         struct xdr_stream xdr;
4206         struct compound_hdr hdr;
4207         int status;
4208
4209         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4210         status = decode_compound_hdr(&xdr, &hdr);
4211         if (status)
4212                 goto out;
4213         status = decode_putfh(&xdr);
4214         if (status)
4215                 goto out;
4216         status = decode_lockt(&xdr, res);
4217 out:
4218         return status;
4219 }
4220
4221 /*
4222  * Decode LOCKU response
4223  */
4224 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4225 {
4226         struct xdr_stream xdr;
4227         struct compound_hdr hdr;
4228         int status;
4229
4230         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4231         status = decode_compound_hdr(&xdr, &hdr);
4232         if (status)
4233                 goto out;
4234         status = decode_putfh(&xdr);
4235         if (status)
4236                 goto out;
4237         status = decode_locku(&xdr, res);
4238 out:
4239         return status;
4240 }
4241
4242 /*
4243  * Decode READLINK response
4244  */
4245 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4246 {
4247         struct xdr_stream xdr;
4248         struct compound_hdr hdr;
4249         int status;
4250
4251         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4252         status = decode_compound_hdr(&xdr, &hdr);
4253         if (status)
4254                 goto out;
4255         status = decode_putfh(&xdr);
4256         if (status)
4257                 goto out;
4258         status = decode_readlink(&xdr, rqstp);
4259 out:
4260         return status;
4261 }
4262
4263 /*
4264  * Decode READDIR response
4265  */
4266 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4267 {
4268         struct xdr_stream xdr;
4269         struct compound_hdr hdr;
4270         int status;
4271
4272         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4273         status = decode_compound_hdr(&xdr, &hdr);
4274         if (status)
4275                 goto out;
4276         status = decode_putfh(&xdr);
4277         if (status)
4278                 goto out;
4279         status = decode_readdir(&xdr, rqstp, res);
4280 out:
4281         return status;
4282 }
4283
4284 /*
4285  * Decode Read response
4286  */
4287 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4288 {
4289         struct xdr_stream xdr;
4290         struct compound_hdr hdr;
4291         int status;
4292
4293         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4294         status = decode_compound_hdr(&xdr, &hdr);
4295         if (status)
4296                 goto out;
4297         status = decode_putfh(&xdr);
4298         if (status)
4299                 goto out;
4300         status = decode_read(&xdr, rqstp, res);
4301         if (!status)
4302                 status = res->count;
4303 out:
4304         return status;
4305 }
4306
4307 /*
4308  * Decode WRITE response
4309  */
4310 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4311 {
4312         struct xdr_stream xdr;
4313         struct compound_hdr hdr;
4314         int status;
4315
4316         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4317         status = decode_compound_hdr(&xdr, &hdr);
4318         if (status)
4319                 goto out;
4320         status = decode_putfh(&xdr);
4321         if (status)
4322                 goto out;
4323         status = decode_write(&xdr, res);
4324         if (status)
4325                 goto out;
4326         decode_getfattr(&xdr, res->fattr, res->server);
4327         if (!status)
4328                 status = res->count;
4329 out:
4330         return status;
4331 }
4332
4333 /*
4334  * Decode COMMIT response
4335  */
4336 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4337 {
4338         struct xdr_stream xdr;
4339         struct compound_hdr hdr;
4340         int status;
4341
4342         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4343         status = decode_compound_hdr(&xdr, &hdr);
4344         if (status)
4345                 goto out;
4346         status = decode_putfh(&xdr);
4347         if (status)
4348                 goto out;
4349         status = decode_commit(&xdr, res);
4350         if (status)
4351                 goto out;
4352         decode_getfattr(&xdr, res->fattr, res->server);
4353 out:
4354         return status;
4355 }
4356
4357 /*
4358  * FSINFO request
4359  */
4360 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4361 {
4362         struct xdr_stream xdr;
4363         struct compound_hdr hdr;
4364         int status;
4365
4366         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4367         status = decode_compound_hdr(&xdr, &hdr);
4368         if (!status)
4369                 status = decode_putfh(&xdr);
4370         if (!status)
4371                 status = decode_fsinfo(&xdr, fsinfo);
4372         if (!status)
4373                 status = -nfs4_stat_to_errno(hdr.status);
4374         return status;
4375 }
4376
4377 /*
4378  * PATHCONF request
4379  */
4380 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4381 {
4382         struct xdr_stream xdr;
4383         struct compound_hdr hdr;
4384         int status;
4385
4386         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4387         status = decode_compound_hdr(&xdr, &hdr);
4388         if (!status)
4389                 status = decode_putfh(&xdr);
4390         if (!status)
4391                 status = decode_pathconf(&xdr, pathconf);
4392         return status;
4393 }
4394
4395 /*
4396  * STATFS request
4397  */
4398 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4399 {
4400         struct xdr_stream xdr;
4401         struct compound_hdr hdr;
4402         int status;
4403
4404         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4405         status = decode_compound_hdr(&xdr, &hdr);
4406         if (!status)
4407                 status = decode_putfh(&xdr);
4408         if (!status)
4409                 status = decode_statfs(&xdr, fsstat);
4410         return status;
4411 }
4412
4413 /*
4414  * GETATTR_BITMAP request
4415  */
4416 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4417 {
4418         struct xdr_stream xdr;
4419         struct compound_hdr hdr;
4420         int status;
4421
4422         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4423         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4424                 goto out;
4425         if ((status = decode_putfh(&xdr)) != 0)
4426                 goto out;
4427         status = decode_server_caps(&xdr, res);
4428 out:
4429         return status;
4430 }
4431
4432 /*
4433  * Decode RENEW response
4434  */
4435 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4436 {
4437         struct xdr_stream xdr;
4438         struct compound_hdr hdr;
4439         int status;
4440
4441         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4442         status = decode_compound_hdr(&xdr, &hdr);
4443         if (!status)
4444                 status = decode_renew(&xdr);
4445         return status;
4446 }
4447
4448 /*
4449  * a SETCLIENTID request
4450  */
4451 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4452                 struct nfs_client *clp)
4453 {
4454         struct xdr_stream xdr;
4455         struct compound_hdr hdr;
4456         int status;
4457
4458         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4459         status = decode_compound_hdr(&xdr, &hdr);
4460         if (!status)
4461                 status = decode_setclientid(&xdr, clp);
4462         if (!status)
4463                 status = -nfs4_stat_to_errno(hdr.status);
4464         return status;
4465 }
4466
4467 /*
4468  * a SETCLIENTID_CONFIRM request
4469  */
4470 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4471 {
4472         struct xdr_stream xdr;
4473         struct compound_hdr hdr;
4474         int status;
4475
4476         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4477         status = decode_compound_hdr(&xdr, &hdr);
4478         if (!status)
4479                 status = decode_setclientid_confirm(&xdr);
4480         if (!status)
4481                 status = decode_putrootfh(&xdr);
4482         if (!status)
4483                 status = decode_fsinfo(&xdr, fsinfo);
4484         if (!status)
4485                 status = -nfs4_stat_to_errno(hdr.status);
4486         return status;
4487 }
4488
4489 /*
4490  * DELEGRETURN request
4491  */
4492 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4493 {
4494         struct xdr_stream xdr;
4495         struct compound_hdr hdr;
4496         int status;
4497
4498         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4499         status = decode_compound_hdr(&xdr, &hdr);
4500         if (status != 0)
4501                 goto out;
4502         status = decode_putfh(&xdr);
4503         if (status != 0)
4504                 goto out;
4505         status = decode_delegreturn(&xdr);
4506         decode_getfattr(&xdr, res->fattr, res->server);
4507 out:
4508         return status;
4509 }
4510
4511 /*
4512  * FS_LOCATIONS request
4513  */
4514 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4515 {
4516         struct xdr_stream xdr;
4517         struct compound_hdr hdr;
4518         int status;
4519
4520         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4521         status = decode_compound_hdr(&xdr, &hdr);
4522         if (status != 0)
4523                 goto out;
4524         if ((status = decode_putfh(&xdr)) != 0)
4525                 goto out;
4526         if ((status = decode_lookup(&xdr)) != 0)
4527                 goto out;
4528         xdr_enter_page(&xdr, PAGE_SIZE);
4529         status = decode_getfattr(&xdr, &res->fattr, res->server);
4530 out:
4531         return status;
4532 }
4533
4534 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4535 {
4536         uint32_t bitmap[2] = {0};
4537         uint32_t len;
4538
4539         if (!*p++) {
4540                 if (!*p)
4541                         return ERR_PTR(-EAGAIN);
4542                 entry->eof = 1;
4543                 return ERR_PTR(-EBADCOOKIE);
4544         }
4545
4546         entry->prev_cookie = entry->cookie;
4547         p = xdr_decode_hyper(p, &entry->cookie);
4548         entry->len = ntohl(*p++);
4549         entry->name = (const char *) p;
4550         p += XDR_QUADLEN(entry->len);
4551
4552         /*
4553          * In case the server doesn't return an inode number,
4554          * we fake one here.  (We don't use inode number 0,
4555          * since glibc seems to choke on it...)
4556          */
4557         entry->ino = 1;
4558
4559         len = ntohl(*p++);              /* bitmap length */
4560         if (len-- > 0) {
4561                 bitmap[0] = ntohl(*p++);
4562                 if (len-- > 0) {
4563                         bitmap[1] = ntohl(*p++);
4564                         p += len;
4565                 }
4566         }
4567         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4568         if (len > 0) {
4569                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4570                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4571                         /* Ignore the return value of rdattr_error for now */
4572                         p++;
4573                         len--;
4574                 }
4575                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4576                         xdr_decode_hyper(p, &entry->ino);
4577                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4578                         xdr_decode_hyper(p, &entry->ino);
4579                 p += len;
4580         }
4581
4582         entry->eof = !p[0] && p[1];
4583         return p;
4584 }
4585
4586 /*
4587  * We need to translate between nfs status return values and
4588  * the local errno values which may not be the same.
4589  */
4590 static struct {
4591         int stat;
4592         int errno;
4593 } nfs_errtbl[] = {
4594         { NFS4_OK,              0               },
4595         { NFS4ERR_PERM,         EPERM           },
4596         { NFS4ERR_NOENT,        ENOENT          },
4597         { NFS4ERR_IO,           errno_NFSERR_IO },
4598         { NFS4ERR_NXIO,         ENXIO           },
4599         { NFS4ERR_ACCESS,       EACCES          },
4600         { NFS4ERR_EXIST,        EEXIST          },
4601         { NFS4ERR_XDEV,         EXDEV           },
4602         { NFS4ERR_NOTDIR,       ENOTDIR         },
4603         { NFS4ERR_ISDIR,        EISDIR          },
4604         { NFS4ERR_INVAL,        EINVAL          },
4605         { NFS4ERR_FBIG,         EFBIG           },
4606         { NFS4ERR_NOSPC,        ENOSPC          },
4607         { NFS4ERR_ROFS,         EROFS           },
4608         { NFS4ERR_MLINK,        EMLINK          },
4609         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4610         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4611         { NFS4ERR_DQUOT,        EDQUOT          },
4612         { NFS4ERR_STALE,        ESTALE          },
4613         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4614         { NFS4ERR_BADOWNER,     EINVAL          },
4615         { NFS4ERR_BADNAME,      EINVAL          },
4616         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4617         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4618         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4619         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4620         { NFS4ERR_BADTYPE,      EBADTYPE        },
4621         { NFS4ERR_LOCKED,       EAGAIN          },
4622         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4623         { NFS4ERR_SYMLINK,      ELOOP           },
4624         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4625         { NFS4ERR_DEADLOCK,     EDEADLK         },
4626         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4627                                                     * to be handled by a
4628                                                     * middle-layer.
4629                                                     */
4630         { -1,                   EIO             }
4631 };
4632
4633 /*
4634  * Convert an NFS error code to a local one.
4635  * This one is used jointly by NFSv2 and NFSv3.
4636  */
4637 static int
4638 nfs4_stat_to_errno(int stat)
4639 {
4640         int i;
4641         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4642                 if (nfs_errtbl[i].stat == stat)
4643                         return nfs_errtbl[i].errno;
4644         }
4645         if (stat <= 10000 || stat > 10100) {
4646                 /* The server is looney tunes. */
4647                 return ESERVERFAULT;
4648         }
4649         /* If we cannot translate the error, the recovery routines should
4650          * handle it.
4651          * Note: remaining NFSv4 error codes have values > 10000, so should
4652          * not conflict with native Linux error codes.
4653          */
4654         return stat;
4655 }
4656
4657 #define PROC(proc, argtype, restype)                            \
4658 [NFSPROC4_CLNT_##proc] = {                                      \
4659         .p_proc   = NFSPROC4_COMPOUND,                          \
4660         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4661         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4662         .p_arglen = NFS4_##argtype##_sz,                        \
4663         .p_replen = NFS4_##restype##_sz,                        \
4664         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4665         .p_name   = #proc,                                      \
4666     }
4667
4668 struct rpc_procinfo     nfs4_procedures[] = {
4669   PROC(READ,            enc_read,       dec_read),
4670   PROC(WRITE,           enc_write,      dec_write),
4671   PROC(COMMIT,          enc_commit,     dec_commit),
4672   PROC(OPEN,            enc_open,       dec_open),
4673   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4674   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4675   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4676   PROC(CLOSE,           enc_close,      dec_close),
4677   PROC(SETATTR,         enc_setattr,    dec_setattr),
4678   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4679   PROC(RENEW,           enc_renew,      dec_renew),
4680   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4681   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4682   PROC(LOCK,            enc_lock,       dec_lock),
4683   PROC(LOCKT,           enc_lockt,      dec_lockt),
4684   PROC(LOCKU,           enc_locku,      dec_locku),
4685   PROC(ACCESS,          enc_access,     dec_access),
4686   PROC(GETATTR,         enc_getattr,    dec_getattr),
4687   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4688   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4689   PROC(REMOVE,          enc_remove,     dec_remove),
4690   PROC(RENAME,          enc_rename,     dec_rename),
4691   PROC(LINK,            enc_link,       dec_link),
4692   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4693   PROC(CREATE,          enc_create,     dec_create),
4694   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4695   PROC(STATFS,          enc_statfs,     dec_statfs),
4696   PROC(READLINK,        enc_readlink,   dec_readlink),
4697   PROC(READDIR,         enc_readdir,    dec_readdir),
4698   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4699   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4700   PROC(GETACL,          enc_getacl,     dec_getacl),
4701   PROC(SETACL,          enc_setacl,     dec_setacl),
4702   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4703 };
4704
4705 struct rpc_version              nfs_version4 = {
4706         .number                 = 4,
4707         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4708         .procs                  = nfs4_procedures
4709 };
4710
4711 /*
4712  * Local variables:
4713  *  c-basic-offset: 8
4714  * End:
4715  */