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         if (!p) printk("RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
 566         BUG_ON(!p);                                             \
 567 } while (0)
 568
 569 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 570 {
 571         __be32 *p;
 572
 573         p = xdr_reserve_space(xdr, 4 + len);
 574         BUG_ON(p == NULL);
 575         xdr_encode_opaque(p, str, len);
 576 }
 577
 578 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 579 {
 580         __be32 *p;
 581
 582         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 583         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 584         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 585         WRITE32(hdr->taglen);
 586         WRITEMEM(hdr->tag, hdr->taglen);
 587         WRITE32(NFS4_MINOR_VERSION);
 588         WRITE32(hdr->nops);
 589         return 0;
 590 }
 591
 592 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 593 {
 594         __be32 *p;
 595
 596         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 597         BUG_ON(p == NULL);
 598         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 599 }
 600
 601 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 602 {
 603         char owner_name[IDMAP_NAMESZ];
 604         char owner_group[IDMAP_NAMESZ];
 605         int owner_namelen = 0;
 606         int owner_grouplen = 0;
 607         __be32 *p;
 608         __be32 *q;
 609         int len;
 610         uint32_t bmval0 = 0;
 611         uint32_t bmval1 = 0;
 612         int status;
 613
 614         /*
 615          * We reserve enough space to write the entire attribute buffer at once.
 616          * In the worst-case, this would be
 617          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 618          *          = 36 bytes, plus any contribution from variable-length fields
 619          *            such as owner/group.
 620          */
 621         len = 16;
 622
 623         /* Sigh */
 624         if (iap->ia_valid & ATTR_SIZE)
 625                 len += 8;
 626         if (iap->ia_valid & ATTR_MODE)
 627                 len += 4;
 628         if (iap->ia_valid & ATTR_UID) {
 629                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 630                 if (owner_namelen < 0) {
 631                         printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
 632                                iap->ia_uid);
 633                         /* XXX */
 634                         strcpy(owner_name, "nobody");
 635                         owner_namelen = sizeof("nobody") - 1;
 636                         /* goto out; */
 637                 }
 638                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 639         }
 640         if (iap->ia_valid & ATTR_GID) {
 641                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 642                 if (owner_grouplen < 0) {
 643                         printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
 644                                iap->ia_gid);
 645                         strcpy(owner_group, "nobody");
 646                         owner_grouplen = sizeof("nobody") - 1;
 647                         /* goto out; */
 648                 }
 649                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 650         }
 651         if (iap->ia_valid & ATTR_ATIME_SET)
 652                 len += 16;
 653         else if (iap->ia_valid & ATTR_ATIME)
 654                 len += 4;
 655         if (iap->ia_valid & ATTR_MTIME_SET)
 656                 len += 16;
 657         else if (iap->ia_valid & ATTR_MTIME)
 658                 len += 4;
 659         RESERVE_SPACE(len);
 660
 661         /*
 662          * We write the bitmap length now, but leave the bitmap and the attribute
 663          * buffer length to be backfilled at the end of this routine.
 664          */
 665         WRITE32(2);
 666         q = p;
 667         p += 3;
 668
 669         if (iap->ia_valid & ATTR_SIZE) {
 670                 bmval0 |= FATTR4_WORD0_SIZE;
 671                 WRITE64(iap->ia_size);
 672         }
 673         if (iap->ia_valid & ATTR_MODE) {
 674                 bmval1 |= FATTR4_WORD1_MODE;
 675                 WRITE32(iap->ia_mode & S_IALLUGO);
 676         }
 677         if (iap->ia_valid & ATTR_UID) {
 678                 bmval1 |= FATTR4_WORD1_OWNER;
 679                 WRITE32(owner_namelen);
 680                 WRITEMEM(owner_name, owner_namelen);
 681         }
 682         if (iap->ia_valid & ATTR_GID) {
 683                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 684                 WRITE32(owner_grouplen);
 685                 WRITEMEM(owner_group, owner_grouplen);
 686         }
 687         if (iap->ia_valid & ATTR_ATIME_SET) {
 688                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 689                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 690                 WRITE32(0);
 691                 WRITE32(iap->ia_mtime.tv_sec);
 692                 WRITE32(iap->ia_mtime.tv_nsec);
 693         }
 694         else if (iap->ia_valid & ATTR_ATIME) {
 695                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 696                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 697         }
 698         if (iap->ia_valid & ATTR_MTIME_SET) {
 699                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 700                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 701                 WRITE32(0);
 702                 WRITE32(iap->ia_mtime.tv_sec);
 703                 WRITE32(iap->ia_mtime.tv_nsec);
 704         }
 705         else if (iap->ia_valid & ATTR_MTIME) {
 706                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 707                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 708         }
 709
 710         /*
 711          * Now we backfill the bitmap and the attribute buffer length.
 712          */
 713         if (len != ((char *)p - (char *)q) + 4) {
 714                 printk ("encode_attr: Attr length calculation error! %u != %Zu\n",
 715                                 len, ((char *)p - (char *)q) + 4);
 716                 BUG();
 717         }
 718         len = (char *)p - (char *)q - 12;
 719         *q++ = htonl(bmval0);
 720         *q++ = htonl(bmval1);
 721         *q++ = htonl(len);
 722
 723         status = 0;
 724 /* out: */
 725         return status;
 726 }
 727
 728 static int encode_access(struct xdr_stream *xdr, u32 access)
 729 {
 730         __be32 *p;
 731
 732         RESERVE_SPACE(8);
 733         WRITE32(OP_ACCESS);
 734         WRITE32(access);
 735
 736         return 0;
 737 }
 738
 739 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 740 {
 741         __be32 *p;
 742
 743         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 744         WRITE32(OP_CLOSE);
 745         WRITE32(arg->seqid->sequence->counter);
 746         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 747
 748         return 0;
 749 }
 750
 751 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 752 {
 753         __be32 *p;
 754
 755         RESERVE_SPACE(16);
 756         WRITE32(OP_COMMIT);
 757         WRITE64(args->offset);
 758         WRITE32(args->count);
 759
 760         return 0;
 761 }
 762
 763 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 764 {
 765         __be32 *p;
 766
 767         RESERVE_SPACE(8);
 768         WRITE32(OP_CREATE);
 769         WRITE32(create->ftype);
 770
 771         switch (create->ftype) {
 772         case NF4LNK:
 773                 RESERVE_SPACE(4);
 774                 WRITE32(create->u.symlink.len);
 775                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 776                 break;
 777
 778         case NF4BLK: case NF4CHR:
 779                 RESERVE_SPACE(8);
 780                 WRITE32(create->u.device.specdata1);
 781                 WRITE32(create->u.device.specdata2);
 782                 break;
 783
 784         default:
 785                 break;
 786         }
 787
 788         RESERVE_SPACE(4 + create->name->len);
 789         WRITE32(create->name->len);
 790         WRITEMEM(create->name->name, create->name->len);
 791
 792         return encode_attrs(xdr, create->attrs, create->server);
 793 }
 794
 795 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 796 {
 797         __be32 *p;
 798
 799         RESERVE_SPACE(12);
 800         WRITE32(OP_GETATTR);
 801         WRITE32(1);
 802         WRITE32(bitmap);
 803         return 0;
 804 }
 805
 806 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 807 {
 808         __be32 *p;
 809
 810         RESERVE_SPACE(16);
 811         WRITE32(OP_GETATTR);
 812         WRITE32(2);
 813         WRITE32(bm0);
 814         WRITE32(bm1);
 815         return 0;
 816 }
 817
 818 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 819 {
 820         return encode_getattr_two(xdr,
 821                         bitmask[0] & nfs4_fattr_bitmap[0],
 822                         bitmask[1] & nfs4_fattr_bitmap[1]);
 823 }
 824
 825 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 826 {
 827         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 828                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 829 }
 830
 831 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 832 {
 833         return encode_getattr_two(xdr,
 834                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 835                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 836 }
 837
 838 static int encode_getfh(struct xdr_stream *xdr)
 839 {
 840         __be32 *p;
 841
 842         RESERVE_SPACE(4);
 843         WRITE32(OP_GETFH);
 844
 845         return 0;
 846 }
 847
 848 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 849 {
 850         __be32 *p;
 851
 852         RESERVE_SPACE(8 + name->len);
 853         WRITE32(OP_LINK);
 854         WRITE32(name->len);
 855         WRITEMEM(name->name, name->len);
 856
 857         return 0;
 858 }
 859
 860 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 861 {
 862         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 863                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 864         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 865 }
 866
 867 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 868 {
 869         if (fl->fl_end == OFFSET_MAX)
 870                 return ~(uint64_t)0;
 871         return fl->fl_end - fl->fl_start + 1;
 872 }
 873
 874 /*
 875  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 876  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 877  */
 878 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 879 {
 880         __be32 *p;
 881
 882         RESERVE_SPACE(32);
 883         WRITE32(OP_LOCK);
 884         WRITE32(nfs4_lock_type(args->fl, args->block));
 885         WRITE32(args->reclaim);
 886         WRITE64(args->fl->fl_start);
 887         WRITE64(nfs4_lock_length(args->fl));
 888         WRITE32(args->new_lock_owner);
 889         if (args->new_lock_owner){
 890                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 891                 WRITE32(args->open_seqid->sequence->counter);
 892                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 893                 WRITE32(args->lock_seqid->sequence->counter);
 894                 WRITE64(args->lock_owner.clientid);
 895                 WRITE32(16);
 896                 WRITEMEM("lock id:", 8);
 897                 WRITE64(args->lock_owner.id);
 898         }
 899         else {
 900                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 901                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 902                 WRITE32(args->lock_seqid->sequence->counter);
 903         }
 904
 905         return 0;
 906 }
 907
 908 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 909 {
 910         __be32 *p;
 911
 912         RESERVE_SPACE(52);
 913         WRITE32(OP_LOCKT);
 914         WRITE32(nfs4_lock_type(args->fl, 0));
 915         WRITE64(args->fl->fl_start);
 916         WRITE64(nfs4_lock_length(args->fl));
 917         WRITE64(args->lock_owner.clientid);
 918         WRITE32(16);
 919         WRITEMEM("lock id:", 8);
 920         WRITE64(args->lock_owner.id);
 921
 922         return 0;
 923 }
 924
 925 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 926 {
 927         __be32 *p;
 928
 929         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 930         WRITE32(OP_LOCKU);
 931         WRITE32(nfs4_lock_type(args->fl, 0));
 932         WRITE32(args->seqid->sequence->counter);
 933         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 934         WRITE64(args->fl->fl_start);
 935         WRITE64(nfs4_lock_length(args->fl));
 936
 937         return 0;
 938 }
 939
 940 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 941 {
 942         int len = name->len;
 943         __be32 *p;
 944
 945         RESERVE_SPACE(8 + len);
 946         WRITE32(OP_LOOKUP);
 947         WRITE32(len);
 948         WRITEMEM(name->name, len);
 949
 950         return 0;
 951 }
 952
 953 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 954 {
 955         __be32 *p;
 956
 957         RESERVE_SPACE(8);
 958         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 959                 case FMODE_READ:
 960                         WRITE32(NFS4_SHARE_ACCESS_READ);
 961                         break;
 962                 case FMODE_WRITE:
 963                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 964                         break;
 965                 case FMODE_READ|FMODE_WRITE:
 966                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 967                         break;
 968                 default:
 969                         BUG();
 970         }
 971         WRITE32(0);             /* for linux, share_deny = 0 always */
 972 }
 973
 974 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 975 {
 976         __be32 *p;
 977  /*
 978  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 979  * owner 4 = 32
 980  */
 981         RESERVE_SPACE(8);
 982         WRITE32(OP_OPEN);
 983         WRITE32(arg->seqid->sequence->counter);
 984         encode_share_access(xdr, arg->open_flags);
 985         RESERVE_SPACE(28);
 986         WRITE64(arg->clientid);
 987         WRITE32(16);
 988         WRITEMEM("open id:", 8);
 989         WRITE64(arg->id);
 990 }
 991
 992 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 993 {
 994         __be32 *p;
 995
 996         RESERVE_SPACE(4);
 997         switch(arg->open_flags & O_EXCL) {
 998                 case 0:
 999                         WRITE32(NFS4_CREATE_UNCHECKED);
1000                         encode_attrs(xdr, arg->u.attrs, arg->server);
1001                         break;
1002                 default:
1003                         WRITE32(NFS4_CREATE_EXCLUSIVE);
1004                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1005         }
1006 }
1007
1008 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1009 {
1010         __be32 *p;
1011
1012         RESERVE_SPACE(4);
1013         switch (arg->open_flags & O_CREAT) {
1014                 case 0:
1015                         WRITE32(NFS4_OPEN_NOCREATE);
1016                         break;
1017                 default:
1018                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1019                         WRITE32(NFS4_OPEN_CREATE);
1020                         encode_createmode(xdr, arg);
1021         }
1022 }
1023
1024 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
1025 {
1026         __be32 *p;
1027
1028         RESERVE_SPACE(4);
1029         switch (delegation_type) {
1030                 case 0:
1031                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
1032                         break;
1033                 case FMODE_READ:
1034                         WRITE32(NFS4_OPEN_DELEGATE_READ);
1035                         break;
1036                 case FMODE_WRITE|FMODE_READ:
1037                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1038                         break;
1039                 default:
1040                         BUG();
1041         }
1042 }
1043
1044 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1045 {
1046         __be32 *p;
1047
1048         RESERVE_SPACE(4);
1049         WRITE32(NFS4_OPEN_CLAIM_NULL);
1050         encode_string(xdr, name->len, name->name);
1051 }
1052
1053 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
1054 {
1055         __be32 *p;
1056
1057         RESERVE_SPACE(4);
1058         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1059         encode_delegation_type(xdr, type);
1060 }
1061
1062 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1063 {
1064         __be32 *p;
1065
1066         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1067         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1068         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1069         encode_string(xdr, name->len, name->name);
1070 }
1071
1072 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1073 {
1074         encode_openhdr(xdr, arg);
1075         encode_opentype(xdr, arg);
1076         switch (arg->claim) {
1077                 case NFS4_OPEN_CLAIM_NULL:
1078                         encode_claim_null(xdr, arg->name);
1079                         break;
1080                 case NFS4_OPEN_CLAIM_PREVIOUS:
1081                         encode_claim_previous(xdr, arg->u.delegation_type);
1082                         break;
1083                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1084                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1085                         break;
1086                 default:
1087                         BUG();
1088         }
1089         return 0;
1090 }
1091
1092 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1093 {
1094         __be32 *p;
1095
1096         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1097         WRITE32(OP_OPEN_CONFIRM);
1098         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1099         WRITE32(arg->seqid->sequence->counter);
1100
1101         return 0;
1102 }
1103
1104 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1105 {
1106         __be32 *p;
1107
1108         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1109         WRITE32(OP_OPEN_DOWNGRADE);
1110         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1111         WRITE32(arg->seqid->sequence->counter);
1112         encode_share_access(xdr, arg->open_flags);
1113         return 0;
1114 }
1115
1116 static int
1117 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1118 {
1119         int len = fh->size;
1120         __be32 *p;
1121
1122         RESERVE_SPACE(8 + len);
1123         WRITE32(OP_PUTFH);
1124         WRITE32(len);
1125         WRITEMEM(fh->data, len);
1126
1127         return 0;
1128 }
1129
1130 static int encode_putrootfh(struct xdr_stream *xdr)
1131 {
1132         __be32 *p;
1133
1134         RESERVE_SPACE(4);
1135         WRITE32(OP_PUTROOTFH);
1136
1137         return 0;
1138 }
1139
1140 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1141 {
1142         nfs4_stateid stateid;
1143         __be32 *p;
1144
1145         RESERVE_SPACE(NFS4_STATEID_SIZE);
1146         if (ctx->state != NULL) {
1147                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1148                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1149         } else
1150                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1151 }
1152
1153 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1154 {
1155         __be32 *p;
1156
1157         RESERVE_SPACE(4);
1158         WRITE32(OP_READ);
1159
1160         encode_stateid(xdr, args->context);
1161
1162         RESERVE_SPACE(12);
1163         WRITE64(args->offset);
1164         WRITE32(args->count);
1165
1166         return 0;
1167 }
1168
1169 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1170 {
1171         uint32_t attrs[2] = {
1172                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1173                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1174         };
1175         __be32 *p;
1176
1177         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1178         WRITE32(OP_READDIR);
1179         WRITE64(readdir->cookie);
1180         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1181         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1182         WRITE32(readdir->count);
1183         WRITE32(2);
1184         /* Switch to mounted_on_fileid if the server supports it */
1185         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1186                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1187         else
1188                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1189         WRITE32(attrs[0] & readdir->bitmask[0]);
1190         WRITE32(attrs[1] & readdir->bitmask[1]);
1191         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1192                         __FUNCTION__,
1193                         (unsigned long long)readdir->cookie,
1194                         ((u32 *)readdir->verifier.data)[0],
1195                         ((u32 *)readdir->verifier.data)[1],
1196                         attrs[0] & readdir->bitmask[0],
1197                         attrs[1] & readdir->bitmask[1]);
1198
1199         return 0;
1200 }
1201
1202 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1203 {
1204         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1205         unsigned int replen;
1206         __be32 *p;
1207
1208         RESERVE_SPACE(4);
1209         WRITE32(OP_READLINK);
1210
1211         /* set up reply kvec
1212          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1213          *      + OP_READLINK + status + string length = 8
1214          */
1215         replen = (RPC_REPHDRSIZE + auth->au_rslack + 8) << 2;
1216         xdr_inline_pages(&req->rq_rcv_buf, replen, readlink->pages,
1217                         readlink->pgbase, readlink->pglen);
1218
1219         return 0;
1220 }
1221
1222 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1223 {
1224         __be32 *p;
1225
1226         RESERVE_SPACE(8 + name->len);
1227         WRITE32(OP_REMOVE);
1228         WRITE32(name->len);
1229         WRITEMEM(name->name, name->len);
1230
1231         return 0;
1232 }
1233
1234 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1235 {
1236         __be32 *p;
1237
1238         RESERVE_SPACE(8 + oldname->len);
1239         WRITE32(OP_RENAME);
1240         WRITE32(oldname->len);
1241         WRITEMEM(oldname->name, oldname->len);
1242
1243         RESERVE_SPACE(4 + newname->len);
1244         WRITE32(newname->len);
1245         WRITEMEM(newname->name, newname->len);
1246
1247         return 0;
1248 }
1249
1250 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1251 {
1252         __be32 *p;
1253
1254         RESERVE_SPACE(12);
1255         WRITE32(OP_RENEW);
1256         WRITE64(client_stateid->cl_clientid);
1257
1258         return 0;
1259 }
1260
1261 static int
1262 encode_restorefh(struct xdr_stream *xdr)
1263 {
1264         __be32 *p;
1265
1266         RESERVE_SPACE(4);
1267         WRITE32(OP_RESTOREFH);
1268
1269         return 0;
1270 }
1271
1272 static int
1273 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1274 {
1275         __be32 *p;
1276
1277         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1278         WRITE32(OP_SETATTR);
1279         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1280         RESERVE_SPACE(2*4);
1281         WRITE32(1);
1282         WRITE32(FATTR4_WORD0_ACL);
1283         if (arg->acl_len % 4)
1284                 return -EINVAL;
1285         RESERVE_SPACE(4);
1286         WRITE32(arg->acl_len);
1287         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1288         return 0;
1289 }
1290
1291 static int
1292 encode_savefh(struct xdr_stream *xdr)
1293 {
1294         __be32 *p;
1295
1296         RESERVE_SPACE(4);
1297         WRITE32(OP_SAVEFH);
1298
1299         return 0;
1300 }
1301
1302 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1303 {
1304         int status;
1305         __be32 *p;
1306
1307         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1308         WRITE32(OP_SETATTR);
1309         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1310
1311         if ((status = encode_attrs(xdr, arg->iap, server)))
1312                 return status;
1313
1314         return 0;
1315 }
1316
1317 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1318 {
1319         __be32 *p;
1320
1321         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1322         WRITE32(OP_SETCLIENTID);
1323         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1324
1325         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1326         RESERVE_SPACE(4);
1327         WRITE32(setclientid->sc_prog);
1328         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1329         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1330         RESERVE_SPACE(4);
1331         WRITE32(setclientid->sc_cb_ident);
1332
1333         return 0;
1334 }
1335
1336 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1337 {
1338         __be32 *p;
1339
1340         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1341         WRITE32(OP_SETCLIENTID_CONFIRM);
1342         WRITE64(client_state->cl_clientid);
1343         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1344
1345         return 0;
1346 }
1347
1348 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1349 {
1350         __be32 *p;
1351
1352         RESERVE_SPACE(4);
1353         WRITE32(OP_WRITE);
1354
1355         encode_stateid(xdr, args->context);
1356
1357         RESERVE_SPACE(16);
1358         WRITE64(args->offset);
1359         WRITE32(args->stable);
1360         WRITE32(args->count);
1361
1362         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1363
1364         return 0;
1365 }
1366
1367 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1368 {
1369         __be32 *p;
1370
1371         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1372
1373         WRITE32(OP_DELEGRETURN);
1374         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1375         return 0;
1376
1377 }
1378 /*
1379  * END OF "GENERIC" ENCODE ROUTINES.
1380  */
1381
1382 /*
1383  * Encode an ACCESS request
1384  */
1385 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1386 {
1387         struct xdr_stream xdr;
1388         struct compound_hdr hdr = {
1389                 .nops = 2,
1390         };
1391         int status;
1392
1393         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1394         encode_compound_hdr(&xdr, &hdr);
1395         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1396                 status = encode_access(&xdr, args->access);
1397         return status;
1398 }
1399
1400 /*
1401  * Encode LOOKUP request
1402  */
1403 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1404 {
1405         struct xdr_stream xdr;
1406         struct compound_hdr hdr = {
1407                 .nops = 4,
1408         };
1409         int status;
1410
1411         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1412         encode_compound_hdr(&xdr, &hdr);
1413         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1414                 goto out;
1415         if ((status = encode_lookup(&xdr, args->name)) != 0)
1416                 goto out;
1417         if ((status = encode_getfh(&xdr)) != 0)
1418                 goto out;
1419         status = encode_getfattr(&xdr, args->bitmask);
1420 out:
1421         return status;
1422 }
1423
1424 /*
1425  * Encode LOOKUP_ROOT request
1426  */
1427 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1428 {
1429         struct xdr_stream xdr;
1430         struct compound_hdr hdr = {
1431                 .nops = 3,
1432         };
1433         int status;
1434
1435         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1436         encode_compound_hdr(&xdr, &hdr);
1437         if ((status = encode_putrootfh(&xdr)) != 0)
1438                 goto out;
1439         if ((status = encode_getfh(&xdr)) == 0)
1440                 status = encode_getfattr(&xdr, args->bitmask);
1441 out:
1442         return status;
1443 }
1444
1445 /*
1446  * Encode REMOVE request
1447  */
1448 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs4_remove_arg *args)
1449 {
1450         struct xdr_stream xdr;
1451         struct compound_hdr hdr = {
1452                 .nops = 3,
1453         };
1454         int status;
1455
1456         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1457         encode_compound_hdr(&xdr, &hdr);
1458         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1459                 goto out;
1460         if ((status = encode_remove(&xdr, args->name)) != 0)
1461                 goto out;
1462         status = encode_getfattr(&xdr, args->bitmask);
1463 out:
1464         return status;
1465 }
1466
1467 /*
1468  * Encode RENAME request
1469  */
1470 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1471 {
1472         struct xdr_stream xdr;
1473         struct compound_hdr hdr = {
1474                 .nops = 7,
1475         };
1476         int status;
1477
1478         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1479         encode_compound_hdr(&xdr, &hdr);
1480         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1481                 goto out;
1482         if ((status = encode_savefh(&xdr)) != 0)
1483                 goto out;
1484         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1485                 goto out;
1486         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1487                 goto out;
1488         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1489                 goto out;
1490         if ((status = encode_restorefh(&xdr)) != 0)
1491                 goto out;
1492         status = encode_getfattr(&xdr, args->bitmask);
1493 out:
1494         return status;
1495 }
1496
1497 /*
1498  * Encode LINK request
1499  */
1500 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1501 {
1502         struct xdr_stream xdr;
1503         struct compound_hdr hdr = {
1504                 .nops = 7,
1505         };
1506         int status;
1507
1508         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1509         encode_compound_hdr(&xdr, &hdr);
1510         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1511                 goto out;
1512         if ((status = encode_savefh(&xdr)) != 0)
1513                 goto out;
1514         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1515                 goto out;
1516         if ((status = encode_link(&xdr, args->name)) != 0)
1517                 goto out;
1518         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1519                 goto out;
1520         if ((status = encode_restorefh(&xdr)) != 0)
1521                 goto out;
1522         status = encode_getfattr(&xdr, args->bitmask);
1523 out:
1524         return status;
1525 }
1526
1527 /*
1528  * Encode CREATE request
1529  */
1530 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1531 {
1532         struct xdr_stream xdr;
1533         struct compound_hdr hdr = {
1534                 .nops = 7,
1535         };
1536         int status;
1537
1538         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1539         encode_compound_hdr(&xdr, &hdr);
1540         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1541                 goto out;
1542         if ((status = encode_savefh(&xdr)) != 0)
1543                 goto out;
1544         if ((status = encode_create(&xdr, args)) != 0)
1545                 goto out;
1546         if ((status = encode_getfh(&xdr)) != 0)
1547                 goto out;
1548         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1549                 goto out;
1550         if ((status = encode_restorefh(&xdr)) != 0)
1551                 goto out;
1552         status = encode_getfattr(&xdr, args->bitmask);
1553 out:
1554         return status;
1555 }
1556
1557 /*
1558  * Encode SYMLINK request
1559  */
1560 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1561 {
1562         return nfs4_xdr_enc_create(req, p, args);
1563 }
1564
1565 /*
1566  * Encode GETATTR request
1567  */
1568 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1569 {
1570         struct xdr_stream xdr;
1571         struct compound_hdr hdr = {
1572                 .nops = 2,
1573         };
1574         int status;
1575
1576         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1577         encode_compound_hdr(&xdr, &hdr);
1578         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1579                 status = encode_getfattr(&xdr, args->bitmask);
1580         return status;
1581 }
1582
1583 /*
1584  * Encode a CLOSE request
1585  */
1586 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1587 {
1588         struct xdr_stream xdr;
1589         struct compound_hdr hdr = {
1590                 .nops   = 3,
1591         };
1592         int status;
1593
1594         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1595         encode_compound_hdr(&xdr, &hdr);
1596         status = encode_putfh(&xdr, args->fh);
1597         if(status)
1598                 goto out;
1599         status = encode_close(&xdr, args);
1600         if (status != 0)
1601                 goto out;
1602         status = encode_getfattr(&xdr, args->bitmask);
1603 out:
1604         return status;
1605 }
1606
1607 /*
1608  * Encode an OPEN request
1609  */
1610 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1611 {
1612         struct xdr_stream xdr;
1613         struct compound_hdr hdr = {
1614                 .nops = 7,
1615         };
1616         int status;
1617
1618         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1619         encode_compound_hdr(&xdr, &hdr);
1620         status = encode_putfh(&xdr, args->fh);
1621         if (status)
1622                 goto out;
1623         status = encode_savefh(&xdr);
1624         if (status)
1625                 goto out;
1626         status = encode_open(&xdr, args);
1627         if (status)
1628                 goto out;
1629         status = encode_getfh(&xdr);
1630         if (status)
1631                 goto out;
1632         status = encode_getfattr(&xdr, args->bitmask);
1633         if (status)
1634                 goto out;
1635         status = encode_restorefh(&xdr);
1636         if (status)
1637                 goto out;
1638         status = encode_getfattr(&xdr, args->bitmask);
1639 out:
1640         return status;
1641 }
1642
1643 /*
1644  * Encode an OPEN_CONFIRM request
1645  */
1646 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1647 {
1648         struct xdr_stream xdr;
1649         struct compound_hdr hdr = {
1650                 .nops   = 2,
1651         };
1652         int status;
1653
1654         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1655         encode_compound_hdr(&xdr, &hdr);
1656         status = encode_putfh(&xdr, args->fh);
1657         if(status)
1658                 goto out;
1659         status = encode_open_confirm(&xdr, args);
1660 out:
1661         return status;
1662 }
1663
1664 /*
1665  * Encode an OPEN request with no attributes.
1666  */
1667 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1668 {
1669         struct xdr_stream xdr;
1670         struct compound_hdr hdr = {
1671                 .nops   = 3,
1672         };
1673         int status;
1674
1675         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1676         encode_compound_hdr(&xdr, &hdr);
1677         status = encode_putfh(&xdr, args->fh);
1678         if (status)
1679                 goto out;
1680         status = encode_open(&xdr, args);
1681         if (status)
1682                 goto out;
1683         status = encode_getfattr(&xdr, args->bitmask);
1684 out:
1685         return status;
1686 }
1687
1688 /*
1689  * Encode an OPEN_DOWNGRADE request
1690  */
1691 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1692 {
1693         struct xdr_stream xdr;
1694         struct compound_hdr hdr = {
1695                 .nops   = 3,
1696         };
1697         int status;
1698
1699         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1700         encode_compound_hdr(&xdr, &hdr);
1701         status = encode_putfh(&xdr, args->fh);
1702         if (status)
1703                 goto out;
1704         status = encode_open_downgrade(&xdr, args);
1705         if (status != 0)
1706                 goto out;
1707         status = encode_getfattr(&xdr, args->bitmask);
1708 out:
1709         return status;
1710 }
1711
1712 /*
1713  * Encode a LOCK request
1714  */
1715 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1716 {
1717         struct xdr_stream xdr;
1718         struct compound_hdr hdr = {
1719                 .nops   = 2,
1720         };
1721         int status;
1722
1723         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1724         encode_compound_hdr(&xdr, &hdr);
1725         status = encode_putfh(&xdr, args->fh);
1726         if(status)
1727                 goto out;
1728         status = encode_lock(&xdr, args);
1729 out:
1730         return status;
1731 }
1732
1733 /*
1734  * Encode a LOCKT request
1735  */
1736 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1737 {
1738         struct xdr_stream xdr;
1739         struct compound_hdr hdr = {
1740                 .nops   = 2,
1741         };
1742         int status;
1743
1744         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1745         encode_compound_hdr(&xdr, &hdr);
1746         status = encode_putfh(&xdr, args->fh);
1747         if(status)
1748                 goto out;
1749         status = encode_lockt(&xdr, args);
1750 out:
1751         return status;
1752 }
1753
1754 /*
1755  * Encode a LOCKU request
1756  */
1757 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1758 {
1759         struct xdr_stream xdr;
1760         struct compound_hdr hdr = {
1761                 .nops   = 2,
1762         };
1763         int status;
1764
1765         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1766         encode_compound_hdr(&xdr, &hdr);
1767         status = encode_putfh(&xdr, args->fh);
1768         if(status)
1769                 goto out;
1770         status = encode_locku(&xdr, args);
1771 out:
1772         return status;
1773 }
1774
1775 /*
1776  * Encode a READLINK request
1777  */
1778 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1779 {
1780         struct xdr_stream xdr;
1781         struct compound_hdr hdr = {
1782                 .nops = 2,
1783         };
1784         int status;
1785
1786         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1787         encode_compound_hdr(&xdr, &hdr);
1788         status = encode_putfh(&xdr, args->fh);
1789         if(status)
1790                 goto out;
1791         status = encode_readlink(&xdr, args, req);
1792 out:
1793         return status;
1794 }
1795
1796 /*
1797  * Encode a READDIR request
1798  */
1799 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1800 {
1801         struct xdr_stream xdr;
1802         struct compound_hdr hdr = {
1803                 .nops = 2,
1804         };
1805         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1806         int replen;
1807         int status;
1808
1809         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1810         encode_compound_hdr(&xdr, &hdr);
1811         status = encode_putfh(&xdr, args->fh);
1812         if(status)
1813                 goto out;
1814         status = encode_readdir(&xdr, args, req);
1815
1816         /* set up reply kvec
1817          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1818          *      + OP_READDIR + status + verifer(2)  = 9
1819          */
1820         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1821         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1822                          args->pgbase, args->count);
1823         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1824                         __FUNCTION__, replen, args->pages,
1825                         args->pgbase, args->count);
1826
1827 out:
1828         return status;
1829 }
1830
1831 /*
1832  * Encode a READ request
1833  */
1834 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1835 {
1836         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1837         struct xdr_stream xdr;
1838         struct compound_hdr hdr = {
1839                 .nops = 2,
1840         };
1841         int replen, status;
1842
1843         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844         encode_compound_hdr(&xdr, &hdr);
1845         status = encode_putfh(&xdr, args->fh);
1846         if (status)
1847                 goto out;
1848         status = encode_read(&xdr, args);
1849         if (status)
1850                 goto out;
1851
1852         /* set up reply kvec
1853          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1854          *       + OP_READ + status + eof + datalen = 9
1855          */
1856         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1857         xdr_inline_pages(&req->rq_rcv_buf, replen,
1858                          args->pages, args->pgbase, args->count);
1859 out:
1860         return status;
1861 }
1862
1863 /*
1864  * Encode an SETATTR request
1865  */
1866 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1867
1868 {
1869         struct xdr_stream xdr;
1870         struct compound_hdr hdr = {
1871                 .nops   = 3,
1872         };
1873         int status;
1874
1875         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1876         encode_compound_hdr(&xdr, &hdr);
1877         status = encode_putfh(&xdr, args->fh);
1878         if(status)
1879                 goto out;
1880         status = encode_setattr(&xdr, args, args->server);
1881         if(status)
1882                 goto out;
1883         status = encode_getfattr(&xdr, args->bitmask);
1884 out:
1885         return status;
1886 }
1887
1888 /*
1889  * Encode a GETACL request
1890  */
1891 static int
1892 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1893                 struct nfs_getaclargs *args)
1894 {
1895         struct xdr_stream xdr;
1896         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1897         struct compound_hdr hdr = {
1898                 .nops   = 2,
1899         };
1900         int replen, status;
1901
1902         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1903         encode_compound_hdr(&xdr, &hdr);
1904         status = encode_putfh(&xdr, args->fh);
1905         if (status)
1906                 goto out;
1907         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1908         /* set up reply buffer: */
1909         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1910         xdr_inline_pages(&req->rq_rcv_buf, replen,
1911                 args->acl_pages, args->acl_pgbase, args->acl_len);
1912 out:
1913         return status;
1914 }
1915
1916 /*
1917  * Encode a WRITE request
1918  */
1919 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .nops = 3,
1924         };
1925         int status;
1926
1927         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1928         encode_compound_hdr(&xdr, &hdr);
1929         status = encode_putfh(&xdr, args->fh);
1930         if (status)
1931                 goto out;
1932         status = encode_write(&xdr, args);
1933         if (status)
1934                 goto out;
1935         status = encode_getfattr(&xdr, args->bitmask);
1936 out:
1937         return status;
1938 }
1939
1940 /*
1941  *  a COMMIT request
1942  */
1943 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1944 {
1945         struct xdr_stream xdr;
1946         struct compound_hdr hdr = {
1947                 .nops = 3,
1948         };
1949         int status;
1950
1951         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1952         encode_compound_hdr(&xdr, &hdr);
1953         status = encode_putfh(&xdr, args->fh);
1954         if (status)
1955                 goto out;
1956         status = encode_commit(&xdr, args);
1957         if (status)
1958                 goto out;
1959         status = encode_getfattr(&xdr, args->bitmask);
1960 out:
1961         return status;
1962 }
1963
1964 /*
1965  * FSINFO request
1966  */
1967 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1968 {
1969         struct xdr_stream xdr;
1970         struct compound_hdr hdr = {
1971                 .nops   = 2,
1972         };
1973         int status;
1974
1975         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1976         encode_compound_hdr(&xdr, &hdr);
1977         status = encode_putfh(&xdr, args->fh);
1978         if (!status)
1979                 status = encode_fsinfo(&xdr, args->bitmask);
1980         return status;
1981 }
1982
1983 /*
1984  * a PATHCONF request
1985  */
1986 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1987 {
1988         struct xdr_stream xdr;
1989         struct compound_hdr hdr = {
1990                 .nops = 2,
1991         };
1992         int status;
1993
1994         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1995         encode_compound_hdr(&xdr, &hdr);
1996         status = encode_putfh(&xdr, args->fh);
1997         if (!status)
1998                 status = encode_getattr_one(&xdr,
1999                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2000         return status;
2001 }
2002
2003 /*
2004  * a STATFS request
2005  */
2006 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2007 {
2008         struct xdr_stream xdr;
2009         struct compound_hdr hdr = {
2010                 .nops = 2,
2011         };
2012         int status;
2013
2014         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2015         encode_compound_hdr(&xdr, &hdr);
2016         status = encode_putfh(&xdr, args->fh);
2017         if (status == 0)
2018                 status = encode_getattr_two(&xdr,
2019                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2020                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2021         return status;
2022 }
2023
2024 /*
2025  * GETATTR_BITMAP request
2026  */
2027 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2028 {
2029         struct xdr_stream xdr;
2030         struct compound_hdr hdr = {
2031                 .nops = 2,
2032         };
2033         int status;
2034
2035         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2036         encode_compound_hdr(&xdr, &hdr);
2037         status = encode_putfh(&xdr, fhandle);
2038         if (status == 0)
2039                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2040                                 FATTR4_WORD0_LINK_SUPPORT|
2041                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2042                                 FATTR4_WORD0_ACLSUPPORT);
2043         return status;
2044 }
2045
2046 /*
2047  * a RENEW request
2048  */
2049 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2050 {
2051         struct xdr_stream xdr;
2052         struct compound_hdr hdr = {
2053                 .nops   = 1,
2054         };
2055
2056         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2057         encode_compound_hdr(&xdr, &hdr);
2058         return encode_renew(&xdr, clp);
2059 }
2060
2061 /*
2062  * a SETCLIENTID request
2063  */
2064 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2065 {
2066         struct xdr_stream xdr;
2067         struct compound_hdr hdr = {
2068                 .nops   = 1,
2069         };
2070
2071         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2072         encode_compound_hdr(&xdr, &hdr);
2073         return encode_setclientid(&xdr, sc);
2074 }
2075
2076 /*
2077  * a SETCLIENTID_CONFIRM request
2078  */
2079 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2080 {
2081         struct xdr_stream xdr;
2082         struct compound_hdr hdr = {
2083                 .nops   = 3,
2084         };
2085         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2086         int status;
2087
2088         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2089         encode_compound_hdr(&xdr, &hdr);
2090         status = encode_setclientid_confirm(&xdr, clp);
2091         if (!status)
2092                 status = encode_putrootfh(&xdr);
2093         if (!status)
2094                 status = encode_fsinfo(&xdr, lease_bitmap);
2095         return status;
2096 }
2097
2098 /*
2099  * DELEGRETURN request
2100  */
2101 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2102 {
2103         struct xdr_stream xdr;
2104         struct compound_hdr hdr = {
2105                 .nops = 3,
2106         };
2107         int status;
2108
2109         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2110         encode_compound_hdr(&xdr, &hdr);
2111         status = encode_putfh(&xdr, args->fhandle);
2112         if (status != 0)
2113                 goto out;
2114         status = encode_delegreturn(&xdr, args->stateid);
2115         if (status != 0)
2116                 goto out;
2117         status = encode_getfattr(&xdr, args->bitmask);
2118 out:
2119         return status;
2120 }
2121
2122 /*
2123  * Encode FS_LOCATIONS request
2124  */
2125 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2126 {
2127         struct xdr_stream xdr;
2128         struct compound_hdr hdr = {
2129                 .nops = 3,
2130         };
2131         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2132         int replen;
2133         int status;
2134
2135         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2136         encode_compound_hdr(&xdr, &hdr);
2137         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2138                 goto out;
2139         if ((status = encode_lookup(&xdr, args->name)) != 0)
2140                 goto out;
2141         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2142                 goto out;
2143         /* set up reply
2144          *   toplevel_status + OP_PUTFH + status
2145          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2146          */
2147         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2148         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2149                         0, PAGE_SIZE);
2150 out:
2151         return status;
2152 }
2153
2154 /*
2155  * START OF "GENERIC" DECODE ROUTINES.
2156  *   These may look a little ugly since they are imported from a "generic"
2157  * set of XDR encode/decode routines which are intended to be shared by
2158  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2159  *
2160  * If the pain of reading these is too great, it should be a straightforward
2161  * task to translate them into Linux-specific versions which are more
2162  * consistent with the style used in NFSv2/v3...
2163  */
2164 #define READ32(x)         (x) = ntohl(*p++)
2165 #define READ64(x)         do {                  \
2166         (x) = (u64)ntohl(*p++) << 32;           \
2167         (x) |= ntohl(*p++);                     \
2168 } while (0)
2169 #define READTIME(x)       do {                  \
2170         p++;                                    \
2171         (x.tv_sec) = ntohl(*p++);               \
2172         (x.tv_nsec) = ntohl(*p++);              \
2173 } while (0)
2174 #define COPYMEM(x,nbytes) do {                  \
2175         memcpy((x), p, nbytes);                 \
2176         p += XDR_QUADLEN(nbytes);               \
2177 } while (0)
2178
2179 #define READ_BUF(nbytes)  do { \
2180         p = xdr_inline_decode(xdr, nbytes); \
2181         if (unlikely(!p)) { \
2182                 printk(KERN_INFO "%s: prematurely hit end of receive" \
2183                                 " buffer\n", __FUNCTION__); \
2184                 printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2185                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2186                 return -EIO; \
2187         } \
2188 } while (0)
2189
2190 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2191 {
2192         __be32 *p;
2193
2194         READ_BUF(4);
2195         READ32(*len);
2196         READ_BUF(*len);
2197         *string = (char *)p;
2198         return 0;
2199 }
2200
2201 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2202 {
2203         __be32 *p;
2204
2205         READ_BUF(8);
2206         READ32(hdr->status);
2207         READ32(hdr->taglen);
2208
2209         READ_BUF(hdr->taglen + 4);
2210         hdr->tag = (char *)p;
2211         p += XDR_QUADLEN(hdr->taglen);
2212         READ32(hdr->nops);
2213         return 0;
2214 }
2215
2216 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2217 {
2218         __be32 *p;
2219         uint32_t opnum;
2220         int32_t nfserr;
2221
2222         READ_BUF(8);
2223         READ32(opnum);
2224         if (opnum != expected) {
2225                 printk(KERN_NOTICE
2226                                 "nfs4_decode_op_hdr: Server returned operation"
2227                                 " %d but we issued a request for %d\n",
2228                                 opnum, expected);
2229                 return -EIO;
2230         }
2231         READ32(nfserr);
2232         if (nfserr != NFS_OK)
2233                 return -nfs4_stat_to_errno(nfserr);
2234         return 0;
2235 }
2236
2237 /* Dummy routine */
2238 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2239 {
2240         __be32 *p;
2241         unsigned int strlen;
2242         char *str;
2243
2244         READ_BUF(12);
2245         return decode_opaque_inline(xdr, &strlen, &str);
2246 }
2247
2248 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2249 {
2250         uint32_t bmlen;
2251         __be32 *p;
2252
2253         READ_BUF(4);
2254         READ32(bmlen);
2255
2256         bitmap[0] = bitmap[1] = 0;
2257         READ_BUF((bmlen << 2));
2258         if (bmlen > 0) {
2259                 READ32(bitmap[0]);
2260                 if (bmlen > 1)
2261                         READ32(bitmap[1]);
2262         }
2263         return 0;
2264 }
2265
2266 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2267 {
2268         __be32 *p;
2269
2270         READ_BUF(4);
2271         READ32(*attrlen);
2272         *savep = xdr->p;
2273         return 0;
2274 }
2275
2276 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2277 {
2278         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2279                 decode_attr_bitmap(xdr, bitmask);
2280                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2281         } else
2282                 bitmask[0] = bitmask[1] = 0;
2283         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2284         return 0;
2285 }
2286
2287 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2288 {
2289         __be32 *p;
2290
2291         *type = 0;
2292         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2293                 return -EIO;
2294         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2295                 READ_BUF(4);
2296                 READ32(*type);
2297                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2298                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2299                         return -EIO;
2300                 }
2301                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2302         }
2303         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2304         return 0;
2305 }
2306
2307 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2308 {
2309         __be32 *p;
2310
2311         *change = 0;
2312         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2313                 return -EIO;
2314         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2315                 READ_BUF(8);
2316                 READ64(*change);
2317                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2318         }
2319         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2320                         (unsigned long long)*change);
2321         return 0;
2322 }
2323
2324 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2325 {
2326         __be32 *p;
2327
2328         *size = 0;
2329         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2330                 return -EIO;
2331         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2332                 READ_BUF(8);
2333                 READ64(*size);
2334                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2335         }
2336         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2337         return 0;
2338 }
2339
2340 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2341 {
2342         __be32 *p;
2343
2344         *res = 0;
2345         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2346                 return -EIO;
2347         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2348                 READ_BUF(4);
2349                 READ32(*res);
2350                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2351         }
2352         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2353         return 0;
2354 }
2355
2356 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2357 {
2358         __be32 *p;
2359
2360         *res = 0;
2361         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2362                 return -EIO;
2363         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2364                 READ_BUF(4);
2365                 READ32(*res);
2366                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2367         }
2368         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2369         return 0;
2370 }
2371
2372 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2373 {
2374         __be32 *p;
2375
2376         fsid->major = 0;
2377         fsid->minor = 0;
2378         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2379                 return -EIO;
2380         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2381                 READ_BUF(16);
2382                 READ64(fsid->major);
2383                 READ64(fsid->minor);
2384                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2385         }
2386         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2387                         (unsigned long long)fsid->major,
2388                         (unsigned long long)fsid->minor);
2389         return 0;
2390 }
2391
2392 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2393 {
2394         __be32 *p;
2395
2396         *res = 60;
2397         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2398                 return -EIO;
2399         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2400                 READ_BUF(4);
2401                 READ32(*res);
2402                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2403         }
2404         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2405         return 0;
2406 }
2407
2408 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2409 {
2410         __be32 *p;
2411
2412         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2413         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2414                 return -EIO;
2415         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2416                 READ_BUF(4);
2417                 READ32(*res);
2418                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2419         }
2420         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2421         return 0;
2422 }
2423
2424 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2425 {
2426         __be32 *p;
2427
2428         *fileid = 0;
2429         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2430                 return -EIO;
2431         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2432                 READ_BUF(8);
2433                 READ64(*fileid);
2434                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2435         }
2436         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2437         return 0;
2438 }
2439
2440 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2441 {
2442         __be32 *p;
2443
2444         *fileid = 0;
2445         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2446                 return -EIO;
2447         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2448                 READ_BUF(8);
2449                 READ64(*fileid);
2450                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2451         }
2452         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2453         return 0;
2454 }
2455
2456 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2457 {
2458         __be32 *p;
2459         int status = 0;
2460
2461         *res = 0;
2462         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2463                 return -EIO;
2464         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2465                 READ_BUF(8);
2466                 READ64(*res);
2467                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2468         }
2469         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2470         return status;
2471 }
2472
2473 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2474 {
2475         __be32 *p;
2476         int status = 0;
2477
2478         *res = 0;
2479         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2480                 return -EIO;
2481         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2482                 READ_BUF(8);
2483                 READ64(*res);
2484                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2485         }
2486         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2487         return status;
2488 }
2489
2490 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2491 {
2492         __be32 *p;
2493         int status = 0;
2494
2495         *res = 0;
2496         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2497                 return -EIO;
2498         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2499                 READ_BUF(8);
2500                 READ64(*res);
2501                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2502         }
2503         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2504         return status;
2505 }
2506
2507 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2508 {
2509         int n;
2510         __be32 *p;
2511         int status = 0;
2512
2513         READ_BUF(4);
2514         READ32(n);
2515         if (n < 0)
2516                 goto out_eio;
2517         if (n == 0)
2518                 goto root_path;
2519         dprintk("path ");
2520         path->ncomponents = 0;
2521         while (path->ncomponents < n) {
2522                 struct nfs4_string *component = &path->components[path->ncomponents];
2523                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2524                 if (unlikely(status != 0))
2525                         goto out_eio;
2526                 if (path->ncomponents != n)
2527                         dprintk("/");
2528                 dprintk("%s", component->data);
2529                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2530                         path->ncomponents++;
2531                 else {
2532                         dprintk("cannot parse %d components in path\n", n);
2533                         goto out_eio;
2534                 }
2535         }
2536 out:
2537         dprintk("\n");
2538         return status;
2539 root_path:
2540 /* a root pathname is sent as a zero component4 */
2541         path->ncomponents = 1;
2542         path->components[0].len=0;
2543         path->components[0].data=NULL;
2544         dprintk("path /\n");
2545         goto out;
2546 out_eio:
2547         dprintk(" status %d", status);
2548         status = -EIO;
2549         goto out;
2550 }
2551
2552 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2553 {
2554         int n;
2555         __be32 *p;
2556         int status = -EIO;
2557
2558         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2559                 goto out;
2560         status = 0;
2561         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2562                 goto out;
2563         dprintk("%s: fsroot ", __FUNCTION__);
2564         status = decode_pathname(xdr, &res->fs_path);
2565         if (unlikely(status != 0))
2566                 goto out;
2567         READ_BUF(4);
2568         READ32(n);
2569         if (n <= 0)
2570                 goto out_eio;
2571         res->nlocations = 0;
2572         while (res->nlocations < n) {
2573                 int m;
2574                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2575
2576                 READ_BUF(4);
2577                 READ32(m);
2578                 if (m <= 0)
2579                         goto out_eio;
2580
2581                 loc->nservers = 0;
2582                 dprintk("%s: servers ", __FUNCTION__);
2583                 while (loc->nservers < m) {
2584                         struct nfs4_string *server = &loc->servers[loc->nservers];
2585                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2586                         if (unlikely(status != 0))
2587                                 goto out_eio;
2588                         dprintk("%s ", server->data);
2589                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2590                                 loc->nservers++;
2591                         else {
2592                                 int i;
2593                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2594                                 for (i = loc->nservers; i < m; i++) {
2595                                         unsigned int len;
2596                                         char *data;
2597                                         status = decode_opaque_inline(xdr, &len, &data);
2598                                         if (unlikely(status != 0))
2599                                                 goto out_eio;
2600                                 }
2601                         }
2602                 }
2603                 status = decode_pathname(xdr, &loc->rootpath);
2604                 if (unlikely(status != 0))
2605                         goto out_eio;
2606                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2607                         res->nlocations++;
2608         }
2609 out:
2610         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2611         return status;
2612 out_eio:
2613         status = -EIO;
2614         goto out;
2615 }
2616
2617 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2618 {
2619         __be32 *p;
2620         int status = 0;
2621
2622         *res = 0;
2623         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2624                 return -EIO;
2625         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2626                 READ_BUF(8);
2627                 READ64(*res);
2628                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2629         }
2630         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2631         return status;
2632 }
2633
2634 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2635 {
2636         __be32 *p;
2637         int status = 0;
2638
2639         *maxlink = 1;
2640         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2641                 return -EIO;
2642         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2643                 READ_BUF(4);
2644                 READ32(*maxlink);
2645                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2646         }
2647         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2648         return status;
2649 }
2650
2651 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2652 {
2653         __be32 *p;
2654         int status = 0;
2655
2656         *maxname = 1024;
2657         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2658                 return -EIO;
2659         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2660                 READ_BUF(4);
2661                 READ32(*maxname);
2662                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2663         }
2664         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2665         return status;
2666 }
2667
2668 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2669 {
2670         __be32 *p;
2671         int status = 0;
2672
2673         *res = 1024;
2674         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2675                 return -EIO;
2676         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2677                 uint64_t maxread;
2678                 READ_BUF(8);
2679                 READ64(maxread);
2680                 if (maxread > 0x7FFFFFFF)
2681                         maxread = 0x7FFFFFFF;
2682                 *res = (uint32_t)maxread;
2683                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2684         }
2685         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2686         return status;
2687 }
2688
2689 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2690 {
2691         __be32 *p;
2692         int status = 0;
2693
2694         *res = 1024;
2695         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2696                 return -EIO;
2697         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2698                 uint64_t maxwrite;
2699                 READ_BUF(8);
2700                 READ64(maxwrite);
2701                 if (maxwrite > 0x7FFFFFFF)
2702                         maxwrite = 0x7FFFFFFF;
2703                 *res = (uint32_t)maxwrite;
2704                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2705         }
2706         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2707         return status;
2708 }
2709
2710 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2711 {
2712         __be32 *p;
2713
2714         *mode = 0;
2715         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2716                 return -EIO;
2717         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2718                 READ_BUF(4);
2719                 READ32(*mode);
2720                 *mode &= ~S_IFMT;
2721                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2722         }
2723         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2724         return 0;
2725 }
2726
2727 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2728 {
2729         __be32 *p;
2730
2731         *nlink = 1;
2732         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2733                 return -EIO;
2734         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2735                 READ_BUF(4);
2736                 READ32(*nlink);
2737                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2738         }
2739         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2740         return 0;
2741 }
2742
2743 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2744 {
2745         uint32_t len;
2746         __be32 *p;
2747
2748         *uid = -2;
2749         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2750                 return -EIO;
2751         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2752                 READ_BUF(4);
2753                 READ32(len);
2754                 READ_BUF(len);
2755                 if (len < XDR_MAX_NETOBJ) {
2756                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2757                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2758                                                 __FUNCTION__);
2759                 } else
2760                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2761                                         __FUNCTION__, len);
2762                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2763         }
2764         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2765         return 0;
2766 }
2767
2768 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2769 {
2770         uint32_t len;
2771         __be32 *p;
2772
2773         *gid = -2;
2774         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2775                 return -EIO;
2776         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2777                 READ_BUF(4);
2778                 READ32(len);
2779                 READ_BUF(len);
2780                 if (len < XDR_MAX_NETOBJ) {
2781                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2782                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2783                                                 __FUNCTION__);
2784                 } else
2785                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2786                                         __FUNCTION__, len);
2787                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2788         }
2789         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2790         return 0;
2791 }
2792
2793 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2794 {
2795         uint32_t major = 0, minor = 0;
2796         __be32 *p;
2797
2798         *rdev = MKDEV(0,0);
2799         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2800                 return -EIO;
2801         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2802                 dev_t tmp;
2803
2804                 READ_BUF(8);
2805                 READ32(major);
2806                 READ32(minor);
2807                 tmp = MKDEV(major, minor);
2808                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2809                         *rdev = tmp;
2810                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2811         }
2812         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2813         return 0;
2814 }
2815
2816 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2817 {
2818         __be32 *p;
2819         int status = 0;
2820
2821         *res = 0;
2822         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2823                 return -EIO;
2824         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2825                 READ_BUF(8);
2826                 READ64(*res);
2827                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2828         }
2829         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2830         return status;
2831 }
2832
2833 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2834 {
2835         __be32 *p;
2836         int status = 0;
2837
2838         *res = 0;
2839         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2840                 return -EIO;
2841         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2842                 READ_BUF(8);
2843                 READ64(*res);
2844                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2845         }
2846         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2847         return status;
2848 }
2849
2850 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2851 {
2852         __be32 *p;
2853         int status = 0;
2854
2855         *res = 0;
2856         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2857                 return -EIO;
2858         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2859                 READ_BUF(8);
2860                 READ64(*res);
2861                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2862         }
2863         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2864         return status;
2865 }
2866
2867 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2868 {
2869         __be32 *p;
2870
2871         *used = 0;
2872         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2873                 return -EIO;
2874         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2875                 READ_BUF(8);
2876                 READ64(*used);
2877                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2878         }
2879         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2880                         (unsigned long long)*used);
2881         return 0;
2882 }
2883
2884 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2885 {
2886         __be32 *p;
2887         uint64_t sec;
2888         uint32_t nsec;
2889
2890         READ_BUF(12);
2891         READ64(sec);
2892         READ32(nsec);
2893         time->tv_sec = (time_t)sec;
2894         time->tv_nsec = (long)nsec;
2895         return 0;
2896 }
2897
2898 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2899 {
2900         int status = 0;
2901
2902         time->tv_sec = 0;
2903         time->tv_nsec = 0;
2904         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2905                 return -EIO;
2906         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2907                 status = decode_attr_time(xdr, time);
2908                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2909         }
2910         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2911         return status;
2912 }
2913
2914 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2915 {
2916         int status = 0;
2917
2918         time->tv_sec = 0;
2919         time->tv_nsec = 0;
2920         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2921                 return -EIO;
2922         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2923                 status = decode_attr_time(xdr, time);
2924                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2925         }
2926         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2927         return status;
2928 }
2929
2930 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2931 {
2932         int status = 0;
2933
2934         time->tv_sec = 0;
2935         time->tv_nsec = 0;
2936         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2937                 return -EIO;
2938         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2939                 status = decode_attr_time(xdr, time);
2940                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2941         }
2942         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2943         return status;
2944 }
2945
2946 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2947 {
2948         unsigned int attrwords = XDR_QUADLEN(attrlen);
2949         unsigned int nwords = xdr->p - savep;
2950
2951         if (unlikely(attrwords != nwords)) {
2952                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2953                                 __FUNCTION__,
2954                                 attrwords << 2,
2955                                 (attrwords < nwords) ? '<' : '>',
2956                                 nwords << 2);
2957                 return -EIO;
2958         }
2959         return 0;
2960 }
2961
2962 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2963 {
2964         __be32 *p;
2965
2966         READ_BUF(20);
2967         READ32(cinfo->atomic);
2968         READ64(cinfo->before);
2969         READ64(cinfo->after);
2970         return 0;
2971 }
2972
2973 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2974 {
2975         __be32 *p;
2976         uint32_t supp, acc;
2977         int status;
2978
2979         status = decode_op_hdr(xdr, OP_ACCESS);
2980         if (status)
2981                 return status;
2982         READ_BUF(8);
2983         READ32(supp);
2984         READ32(acc);
2985         access->supported = supp;
2986         access->access = acc;
2987         return 0;
2988 }
2989
2990 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2991 {
2992         __be32 *p;
2993         int status;
2994
2995         status = decode_op_hdr(xdr, OP_CLOSE);
2996         if (status)
2997                 return status;
2998         READ_BUF(NFS4_STATEID_SIZE);
2999         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3000         return 0;
3001 }
3002
3003 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3004 {
3005         __be32 *p;
3006         int status;
3007
3008         status = decode_op_hdr(xdr, OP_COMMIT);
3009         if (status)
3010                 return status;
3011         READ_BUF(8);
3012         COPYMEM(res->verf->verifier, 8);
3013         return 0;
3014 }
3015
3016 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3017 {
3018         __be32 *p;
3019         uint32_t bmlen;
3020         int status;
3021
3022         status = decode_op_hdr(xdr, OP_CREATE);
3023         if (status)
3024                 return status;
3025         if ((status = decode_change_info(xdr, cinfo)))
3026                 return status;
3027         READ_BUF(4);
3028         READ32(bmlen);
3029         READ_BUF(bmlen << 2);
3030         return 0;
3031 }
3032
3033 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3034 {
3035         __be32 *savep;
3036         uint32_t attrlen,
3037                  bitmap[2] = {0};
3038         int status;
3039
3040         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3041                 goto xdr_error;
3042         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3043                 goto xdr_error;
3044         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3045                 goto xdr_error;
3046         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3047                 goto xdr_error;
3048         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3049                 goto xdr_error;
3050         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3051                 goto xdr_error;
3052         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3053                 goto xdr_error;
3054         status = verify_attr_len(xdr, savep, attrlen);
3055 xdr_error:
3056         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3057         return status;
3058 }
3059
3060 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3061 {
3062         __be32 *savep;
3063         uint32_t attrlen,
3064                  bitmap[2] = {0};
3065         int status;
3066
3067         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3068                 goto xdr_error;
3069         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3070                 goto xdr_error;
3071         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3072                 goto xdr_error;
3073
3074         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3075                 goto xdr_error;
3076         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3077                 goto xdr_error;
3078         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3079                 goto xdr_error;
3080         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3081                 goto xdr_error;
3082         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3083                 goto xdr_error;
3084         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3085                 goto xdr_error;
3086
3087         status = verify_attr_len(xdr, savep, attrlen);
3088 xdr_error:
3089         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3090         return status;
3091 }
3092
3093 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3094 {
3095         __be32 *savep;
3096         uint32_t attrlen,
3097                  bitmap[2] = {0};
3098         int status;
3099
3100         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3101                 goto xdr_error;
3102         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3103                 goto xdr_error;
3104         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3105                 goto xdr_error;
3106
3107         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3108                 goto xdr_error;
3109         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3110                 goto xdr_error;
3111
3112         status = verify_attr_len(xdr, savep, attrlen);
3113 xdr_error:
3114         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3115         return status;
3116 }
3117
3118 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3119 {
3120         __be32 *savep;
3121         uint32_t attrlen,
3122                  bitmap[2] = {0},
3123                  type;
3124         int status, fmode = 0;
3125         uint64_t fileid;
3126
3127         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3128                 goto xdr_error;
3129         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3130                 goto xdr_error;
3131
3132         fattr->bitmap[0] = bitmap[0];
3133         fattr->bitmap[1] = bitmap[1];
3134
3135         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3136                 goto xdr_error;
3137
3138
3139         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3140                 goto xdr_error;
3141         fattr->type = nfs_type2fmt[type].nfs2type;
3142         fmode = nfs_type2fmt[type].mode;
3143
3144         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3145                 goto xdr_error;
3146         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3147                 goto xdr_error;
3148         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3149                 goto xdr_error;
3150         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3151                 goto xdr_error;
3152         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3153                                                 struct nfs4_fs_locations,
3154                                                 fattr))) != 0)
3155                 goto xdr_error;
3156         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3157                 goto xdr_error;
3158         fattr->mode |= fmode;
3159         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3160                 goto xdr_error;
3161         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3162                 goto xdr_error;
3163         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3164                 goto xdr_error;
3165         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3166                 goto xdr_error;
3167         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3168                 goto xdr_error;
3169         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3170                 goto xdr_error;
3171         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3172                 goto xdr_error;
3173         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3174                 goto xdr_error;
3175         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3176                 goto xdr_error;
3177         if (fattr->fileid == 0 && fileid != 0)
3178                 fattr->fileid = fileid;
3179         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3180                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3181 xdr_error:
3182         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3183         return status;
3184 }
3185
3186
3187 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3188 {
3189         __be32 *savep;
3190         uint32_t attrlen, bitmap[2];
3191         int status;
3192
3193         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3194                 goto xdr_error;
3195         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3196                 goto xdr_error;
3197         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3198                 goto xdr_error;
3199
3200         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3201
3202         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3203                 goto xdr_error;
3204         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3205                 goto xdr_error;
3206         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3207                 goto xdr_error;
3208         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3209         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3210                 goto xdr_error;
3211         fsinfo->wtpref = fsinfo->wtmax;
3212
3213         status = verify_attr_len(xdr, savep, attrlen);
3214 xdr_error:
3215         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3216         return status;
3217 }
3218
3219 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3220 {
3221         __be32 *p;
3222         uint32_t len;
3223         int status;
3224
3225         /* Zero handle first to allow comparisons */
3226         memset(fh, 0, sizeof(*fh));
3227
3228         status = decode_op_hdr(xdr, OP_GETFH);
3229         if (status)
3230                 return status;
3231
3232         READ_BUF(4);
3233         READ32(len);
3234         if (len > NFS4_FHSIZE)
3235                 return -EIO;
3236         fh->size = len;
3237         READ_BUF(len);
3238         COPYMEM(fh->data, len);
3239         return 0;
3240 }
3241
3242 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3243 {
3244         int status;
3245
3246         status = decode_op_hdr(xdr, OP_LINK);
3247         if (status)
3248                 return status;
3249         return decode_change_info(xdr, cinfo);
3250 }
3251
3252 /*
3253  * We create the owner, so we know a proper owner.id length is 4.
3254  */
3255 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3256 {
3257         uint64_t offset, length, clientid;
3258         __be32 *p;
3259         uint32_t namelen, type;
3260
3261         READ_BUF(32);
3262         READ64(offset);
3263         READ64(length);
3264         READ32(type);
3265         if (fl != NULL) {
3266                 fl->fl_start = (loff_t)offset;
3267                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3268                 if (length == ~(uint64_t)0)
3269                         fl->fl_end = OFFSET_MAX;
3270                 fl->fl_type = F_WRLCK;
3271                 if (type & 1)
3272                         fl->fl_type = F_RDLCK;
3273                 fl->fl_pid = 0;
3274         }
3275         READ64(clientid);
3276         READ32(namelen);
3277         READ_BUF(namelen);
3278         return -NFS4ERR_DENIED;
3279 }
3280
3281 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3282 {
3283         __be32 *p;
3284         int status;
3285
3286         status = decode_op_hdr(xdr, OP_LOCK);
3287         if (status == 0) {
3288                 READ_BUF(NFS4_STATEID_SIZE);
3289                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3290         } else if (status == -NFS4ERR_DENIED)
3291                 return decode_lock_denied(xdr, NULL);
3292         return status;
3293 }
3294
3295 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3296 {
3297         int status;
3298         status = decode_op_hdr(xdr, OP_LOCKT);
3299         if (status == -NFS4ERR_DENIED)
3300                 return decode_lock_denied(xdr, res->denied);
3301         return status;
3302 }
3303
3304 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3305 {
3306         __be32 *p;
3307         int status;
3308
3309         status = decode_op_hdr(xdr, OP_LOCKU);
3310         if (status == 0) {
3311                 READ_BUF(NFS4_STATEID_SIZE);
3312                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3313         }
3314         return status;
3315 }
3316
3317 static int decode_lookup(struct xdr_stream *xdr)
3318 {
3319         return decode_op_hdr(xdr, OP_LOOKUP);
3320 }
3321
3322 /* This is too sick! */
3323 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3324 {
3325         __be32 *p;
3326         uint32_t limit_type, nblocks, blocksize;
3327
3328         READ_BUF(12);
3329         READ32(limit_type);
3330         switch (limit_type) {
3331                 case 1:
3332                         READ64(*maxsize);
3333                         break;
3334                 case 2:
3335                         READ32(nblocks);
3336                         READ32(blocksize);
3337                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3338         }
3339         return 0;
3340 }
3341
3342 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3343 {
3344         __be32 *p;
3345         uint32_t delegation_type;
3346
3347         READ_BUF(4);
3348         READ32(delegation_type);
3349         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3350                 res->delegation_type = 0;
3351                 return 0;
3352         }
3353         READ_BUF(NFS4_STATEID_SIZE+4);
3354         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3355         READ32(res->do_recall);
3356         switch (delegation_type) {
3357                 case NFS4_OPEN_DELEGATE_READ:
3358                         res->delegation_type = FMODE_READ;
3359                         break;
3360                 case NFS4_OPEN_DELEGATE_WRITE:
3361                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3362                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3363                                 return -EIO;
3364         }
3365         return decode_ace(xdr, NULL, res->server->nfs_client);
3366 }
3367
3368 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3369 {
3370         __be32 *p;
3371         uint32_t savewords, bmlen, i;
3372         int status;
3373
3374         status = decode_op_hdr(xdr, OP_OPEN);
3375         if (status)
3376                 return status;
3377         READ_BUF(NFS4_STATEID_SIZE);
3378         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3379
3380         decode_change_info(xdr, &res->cinfo);
3381
3382         READ_BUF(8);
3383         READ32(res->rflags);
3384         READ32(bmlen);
3385         if (bmlen > 10)
3386                 goto xdr_error;
3387
3388         READ_BUF(bmlen << 2);
3389         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3390         for (i = 0; i < savewords; ++i)
3391                 READ32(res->attrset[i]);
3392         for (; i < NFS4_BITMAP_SIZE; i++)
3393                 res->attrset[i] = 0;
3394
3395         return decode_delegation(xdr, res);
3396 xdr_error:
3397         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3398         return -EIO;
3399 }
3400
3401 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3402 {
3403         __be32 *p;
3404         int status;
3405
3406         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3407         if (status)
3408                 return status;
3409         READ_BUF(NFS4_STATEID_SIZE);
3410         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3411         return 0;
3412 }
3413
3414 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3415 {
3416         __be32 *p;
3417         int status;
3418
3419         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3420         if (status)
3421                 return status;
3422         READ_BUF(NFS4_STATEID_SIZE);
3423         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3424         return 0;
3425 }
3426
3427 static int decode_putfh(struct xdr_stream *xdr)
3428 {
3429         return decode_op_hdr(xdr, OP_PUTFH);
3430 }
3431
3432 static int decode_putrootfh(struct xdr_stream *xdr)
3433 {
3434         return decode_op_hdr(xdr, OP_PUTROOTFH);
3435 }
3436
3437 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3438 {
3439         struct kvec *iov = req->rq_rcv_buf.head;
3440         __be32 *p;
3441         uint32_t count, eof, recvd, hdrlen;
3442         int status;
3443
3444         status = decode_op_hdr(xdr, OP_READ);
3445         if (status)
3446                 return status;
3447         READ_BUF(8);
3448         READ32(eof);
3449         READ32(count);
3450         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3451         recvd = req->rq_rcv_buf.len - hdrlen;
3452         if (count > recvd) {
3453                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3454                                 "count %u > recvd %u\n", count, recvd);
3455                 count = recvd;
3456                 eof = 0;
3457         }
3458         xdr_read_pages(xdr, count);
3459         res->eof = eof;
3460         res->count = count;
3461         return 0;
3462 }
3463
3464 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3465 {
3466         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3467         struct page     *page = *rcvbuf->pages;
3468         struct kvec     *iov = rcvbuf->head;
3469         unsigned int    nr, pglen = rcvbuf->page_len;
3470         __be32          *end, *entry, *p, *kaddr;
3471         uint32_t        len, attrlen, xlen;
3472         int             hdrlen, recvd, status;
3473
3474         status = decode_op_hdr(xdr, OP_READDIR);
3475         if (status)
3476                 return status;
3477         READ_BUF(8);
3478         COPYMEM(readdir->verifier.data, 8);
3479         dprintk("%s: verifier = 0x%x%x\n",
3480                         __FUNCTION__,
3481                         ((u32 *)readdir->verifier.data)[0],
3482                         ((u32 *)readdir->verifier.data)[1]);
3483
3484
3485         hdrlen = (char *) p - (char *) iov->iov_base;
3486         recvd = rcvbuf->len - hdrlen;
3487         if (pglen > recvd)
3488                 pglen = recvd;
3489         xdr_read_pages(xdr, pglen);
3490
3491         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3492         kaddr = p = kmap_atomic(page, KM_USER0);
3493         end = p + ((pglen + readdir->pgbase) >> 2);
3494         entry = p;
3495         for (nr = 0; *p++; nr++) {
3496                 if (end - p < 3)
3497                         goto short_pkt;
3498                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3499                 p += 2;                 /* cookie */
3500                 len = ntohl(*p++);      /* filename length */
3501                 if (len > NFS4_MAXNAMLEN) {
3502                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3503                         goto err_unmap;
3504                 }
3505                 xlen = XDR_QUADLEN(len);
3506                 if (end - p < xlen + 1)
3507                         goto short_pkt;
3508                 dprintk("filename = %*s\n", len, (char *)p);
3509                 p += xlen;
3510                 len = ntohl(*p++);      /* bitmap length */
3511                 if (end - p < len + 1)
3512                         goto short_pkt;
3513                 p += len;
3514                 attrlen = XDR_QUADLEN(ntohl(*p++));
3515                 if (end - p < attrlen + 2)
3516                         goto short_pkt;
3517                 p += attrlen;           /* attributes */
3518                 entry = p;
3519         }
3520         if (!nr && (entry[0] != 0 || entry[1] == 0))
3521                 goto short_pkt;
3522 out:
3523         kunmap_atomic(kaddr, KM_USER0);
3524         return 0;
3525 short_pkt:
3526         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3527         entry[0] = entry[1] = 0;
3528         /* truncate listing ? */
3529         if (!nr) {
3530                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3531                 entry[1] = 1;
3532         }
3533         goto out;
3534 err_unmap:
3535         kunmap_atomic(kaddr, KM_USER0);
3536         return -errno_NFSERR_IO;
3537 }
3538
3539 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3540 {
3541         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3542         struct kvec *iov = rcvbuf->head;
3543         int hdrlen, len, recvd;
3544         __be32 *p;
3545         char *kaddr;
3546         int status;
3547
3548         status = decode_op_hdr(xdr, OP_READLINK);
3549         if (status)
3550                 return status;
3551
3552         /* Convert length of symlink */
3553         READ_BUF(4);
3554         READ32(len);
3555         if (len >= rcvbuf->page_len || len <= 0) {
3556                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3557                 return -ENAMETOOLONG;
3558         }
3559         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3560         recvd = req->rq_rcv_buf.len - hdrlen;
3561         if (recvd < len) {
3562                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3563                                 "count %u > recvd %u\n", len, recvd);
3564                 return -EIO;
3565         }
3566         xdr_read_pages(xdr, len);
3567         /*
3568          * The XDR encode routine has set things up so that
3569          * the link text will be copied directly into the
3570          * buffer.  We just have to do overflow-checking,
3571          * and and null-terminate the text (the VFS expects
3572          * null-termination).
3573          */
3574         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3575         kaddr[len+rcvbuf->page_base] = '\0';
3576         kunmap_atomic(kaddr, KM_USER0);
3577         return 0;
3578 }
3579
3580 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3581 {
3582         int status;
3583
3584         status = decode_op_hdr(xdr, OP_REMOVE);
3585         if (status)
3586                 goto out;
3587         status = decode_change_info(xdr, cinfo);
3588 out:
3589         return status;
3590 }
3591
3592 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3593               struct nfs4_change_info *new_cinfo)
3594 {
3595         int status;
3596
3597         status = decode_op_hdr(xdr, OP_RENAME);
3598         if (status)
3599                 goto out;
3600         if ((status = decode_change_info(xdr, old_cinfo)))
3601                 goto out;
3602         status = decode_change_info(xdr, new_cinfo);
3603 out:
3604         return status;
3605 }
3606
3607 static int decode_renew(struct xdr_stream *xdr)
3608 {
3609         return decode_op_hdr(xdr, OP_RENEW);
3610 }
3611
3612 static int
3613 decode_restorefh(struct xdr_stream *xdr)
3614 {
3615         return decode_op_hdr(xdr, OP_RESTOREFH);
3616 }
3617
3618 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3619                 size_t *acl_len)
3620 {
3621         __be32 *savep;
3622         uint32_t attrlen,
3623                  bitmap[2] = {0};
3624         struct kvec *iov = req->rq_rcv_buf.head;
3625         int status;
3626
3627         *acl_len = 0;
3628         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3629                 goto out;
3630         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3631                 goto out;
3632         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3633                 goto out;
3634
3635         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3636                 return -EIO;
3637         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3638                 int hdrlen, recvd;
3639
3640                 /* We ignore &savep and don't do consistency checks on
3641                  * the attr length.  Let userspace figure it out.... */
3642                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3643                 recvd = req->rq_rcv_buf.len - hdrlen;
3644                 if (attrlen > recvd) {
3645                         printk(KERN_WARNING "NFS: server cheating in getattr"
3646                                         " acl reply: attrlen %u > recvd %u\n",
3647                                         attrlen, recvd);
3648                         return -EINVAL;
3649                 }
3650                 xdr_read_pages(xdr, attrlen);
3651                 *acl_len = attrlen;
3652         } else
3653                 status = -EOPNOTSUPP;
3654
3655 out:
3656         return status;
3657 }
3658
3659 static int
3660 decode_savefh(struct xdr_stream *xdr)
3661 {
3662         return decode_op_hdr(xdr, OP_SAVEFH);
3663 }
3664
3665 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3666 {
3667         __be32 *p;
3668         uint32_t bmlen;
3669         int status;
3670
3671
3672         status = decode_op_hdr(xdr, OP_SETATTR);
3673         if (status)
3674                 return status;
3675         READ_BUF(4);
3676         READ32(bmlen);
3677         READ_BUF(bmlen << 2);
3678         return 0;
3679 }
3680
3681 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3682 {
3683         __be32 *p;
3684         uint32_t opnum;
3685         int32_t nfserr;
3686
3687         READ_BUF(8);
3688         READ32(opnum);
3689         if (opnum != OP_SETCLIENTID) {
3690                 printk(KERN_NOTICE
3691                                 "nfs4_decode_setclientid: Server returned operation"
3692                                 " %d\n", opnum);
3693                 return -EIO;
3694         }
3695         READ32(nfserr);
3696         if (nfserr == NFS_OK) {
3697                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3698                 READ64(clp->cl_clientid);
3699                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3700         } else if (nfserr == NFSERR_CLID_INUSE) {
3701                 uint32_t len;
3702
3703                 /* skip netid string */
3704                 READ_BUF(4);
3705                 READ32(len);
3706                 READ_BUF(len);
3707
3708                 /* skip uaddr string */
3709                 READ_BUF(4);
3710                 READ32(len);
3711                 READ_BUF(len);
3712                 return -NFSERR_CLID_INUSE;
3713         } else
3714                 return -nfs4_stat_to_errno(nfserr);
3715
3716         return 0;
3717 }
3718
3719 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3720 {
3721         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3722 }
3723
3724 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3725 {
3726         __be32 *p;
3727         int status;
3728
3729         status = decode_op_hdr(xdr, OP_WRITE);
3730         if (status)
3731                 return status;
3732
3733         READ_BUF(16);
3734         READ32(res->count);
3735         READ32(res->verf->committed);
3736         COPYMEM(res->verf->verifier, 8);
3737         return 0;
3738 }
3739
3740 static int decode_delegreturn(struct xdr_stream *xdr)
3741 {
3742         return decode_op_hdr(xdr, OP_DELEGRETURN);
3743 }
3744
3745 /*
3746  * Decode OPEN_DOWNGRADE response
3747  */
3748 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3749 {
3750         struct xdr_stream xdr;
3751         struct compound_hdr hdr;
3752         int status;
3753
3754         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3755         status = decode_compound_hdr(&xdr, &hdr);
3756         if (status)
3757                 goto out;
3758         status = decode_putfh(&xdr);
3759         if (status)
3760                 goto out;
3761         status = decode_open_downgrade(&xdr, res);
3762         if (status != 0)
3763                 goto out;
3764         decode_getfattr(&xdr, res->fattr, res->server);
3765 out:
3766         return status;
3767 }
3768
3769 /*
3770  * END OF "GENERIC" DECODE ROUTINES.
3771  */
3772
3773 /*
3774  * Decode ACCESS response
3775  */
3776 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3777 {
3778         struct xdr_stream xdr;
3779         struct compound_hdr hdr;
3780         int status;
3781
3782         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3783         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3784                 goto out;
3785         if ((status = decode_putfh(&xdr)) == 0)
3786                 status = decode_access(&xdr, res);
3787 out:
3788         return status;
3789 }
3790
3791 /*
3792  * Decode LOOKUP response
3793  */
3794 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3795 {
3796         struct xdr_stream xdr;
3797         struct compound_hdr hdr;
3798         int status;
3799
3800         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3801         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3802                 goto out;
3803         if ((status = decode_putfh(&xdr)) != 0)
3804                 goto out;
3805         if ((status = decode_lookup(&xdr)) != 0)
3806                 goto out;
3807         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3808                 goto out;
3809         status = decode_getfattr(&xdr, res->fattr, res->server);
3810 out:
3811         return status;
3812 }
3813
3814 /*
3815  * Decode LOOKUP_ROOT response
3816  */
3817 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3818 {
3819         struct xdr_stream xdr;
3820         struct compound_hdr hdr;
3821         int status;
3822
3823         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3824         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3825                 goto out;
3826         if ((status = decode_putrootfh(&xdr)) != 0)
3827                 goto out;
3828         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3829                 status = decode_getfattr(&xdr, res->fattr, res->server);
3830 out:
3831         return status;
3832 }
3833
3834 /*
3835  * Decode REMOVE response
3836  */
3837 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_remove_res *res)
3838 {
3839         struct xdr_stream xdr;
3840         struct compound_hdr hdr;
3841         int status;
3842
3843         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3844         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3845                 goto out;
3846         if ((status = decode_putfh(&xdr)) != 0)
3847                 goto out;
3848         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3849                 goto out;
3850         decode_getfattr(&xdr, res->dir_attr, res->server);
3851 out:
3852         return status;
3853 }
3854
3855 /*
3856  * Decode RENAME response
3857  */
3858 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3859 {
3860         struct xdr_stream xdr;
3861         struct compound_hdr hdr;
3862         int status;
3863
3864         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3865         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3866                 goto out;
3867         if ((status = decode_putfh(&xdr)) != 0)
3868                 goto out;
3869         if ((status = decode_savefh(&xdr)) != 0)
3870                 goto out;
3871         if ((status = decode_putfh(&xdr)) != 0)
3872                 goto out;
3873         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3874                 goto out;
3875         /* Current FH is target directory */
3876         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3877                 goto out;
3878         if ((status = decode_restorefh(&xdr)) != 0)
3879                 goto out;
3880         decode_getfattr(&xdr, res->old_fattr, res->server);
3881 out:
3882         return status;
3883 }
3884
3885 /*
3886  * Decode LINK response
3887  */
3888 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3889 {
3890         struct xdr_stream xdr;
3891         struct compound_hdr hdr;
3892         int status;
3893
3894         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3895         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3896                 goto out;
3897         if ((status = decode_putfh(&xdr)) != 0)
3898                 goto out;
3899         if ((status = decode_savefh(&xdr)) != 0)
3900                 goto out;
3901         if ((status = decode_putfh(&xdr)) != 0)
3902                 goto out;
3903         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3904                 goto out;
3905         /*
3906          * Note order: OP_LINK leaves the directory as the current
3907          *             filehandle.
3908          */
3909         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3910                 goto out;
3911         if ((status = decode_restorefh(&xdr)) != 0)
3912                 goto out;
3913         decode_getfattr(&xdr, res->fattr, res->server);
3914 out:
3915         return status;
3916 }
3917
3918 /*
3919  * Decode CREATE response
3920  */
3921 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3922 {
3923         struct xdr_stream xdr;
3924         struct compound_hdr hdr;
3925         int status;
3926
3927         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3928         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3929                 goto out;
3930         if ((status = decode_putfh(&xdr)) != 0)
3931                 goto out;
3932         if ((status = decode_savefh(&xdr)) != 0)
3933                 goto out;
3934         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3935                 goto out;
3936         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3937                 goto out;
3938         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3939                 goto out;
3940         if ((status = decode_restorefh(&xdr)) != 0)
3941                 goto out;
3942         decode_getfattr(&xdr, res->dir_fattr, res->server);
3943 out:
3944         return status;
3945 }
3946
3947 /*
3948  * Decode SYMLINK response
3949  */
3950 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3951 {
3952         return nfs4_xdr_dec_create(rqstp, p, res);
3953 }
3954
3955 /*
3956  * Decode GETATTR response
3957  */
3958 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3959 {
3960         struct xdr_stream xdr;
3961         struct compound_hdr hdr;
3962         int status;
3963
3964         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3965         status = decode_compound_hdr(&xdr, &hdr);
3966         if (status)
3967                 goto out;
3968         status = decode_putfh(&xdr);
3969         if (status)
3970                 goto out;
3971         status = decode_getfattr(&xdr, res->fattr, res->server);
3972 out:
3973         return status;
3974
3975 }
3976
3977 /*
3978  * Encode an SETACL request
3979  */
3980 static int
3981 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3982 {
3983         struct xdr_stream xdr;
3984         struct compound_hdr hdr = {
3985                 .nops   = 2,
3986         };
3987         int status;
3988
3989         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3990         encode_compound_hdr(&xdr, &hdr);
3991         status = encode_putfh(&xdr, args->fh);
3992         if (status)
3993                 goto out;
3994         status = encode_setacl(&xdr, args);
3995 out:
3996         return status;
3997 }
3998 /*
3999  * Decode SETACL response
4000  */
4001 static int
4002 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4003 {
4004         struct xdr_stream xdr;
4005         struct compound_hdr hdr;
4006         int status;
4007
4008         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4009         status = decode_compound_hdr(&xdr, &hdr);
4010         if (status)
4011                 goto out;
4012         status = decode_putfh(&xdr);
4013         if (status)
4014                 goto out;
4015         status = decode_setattr(&xdr, res);
4016 out:
4017         return status;
4018 }
4019
4020 /*
4021  * Decode GETACL response
4022  */
4023 static int
4024 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4025 {
4026         struct xdr_stream xdr;
4027         struct compound_hdr hdr;
4028         int status;
4029
4030         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4031         status = decode_compound_hdr(&xdr, &hdr);
4032         if (status)
4033                 goto out;
4034         status = decode_putfh(&xdr);
4035         if (status)
4036                 goto out;
4037         status = decode_getacl(&xdr, rqstp, acl_len);
4038
4039 out:
4040         return status;
4041 }
4042
4043 /*
4044  * Decode CLOSE response
4045  */
4046 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4047 {
4048         struct xdr_stream xdr;
4049         struct compound_hdr hdr;
4050         int status;
4051
4052         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4053         status = decode_compound_hdr(&xdr, &hdr);
4054         if (status)
4055                 goto out;
4056         status = decode_putfh(&xdr);
4057         if (status)
4058                 goto out;
4059         status = decode_close(&xdr, res);
4060         if (status != 0)
4061                 goto out;
4062         /*
4063          * Note: Server may do delete on close for this file
4064          *      in which case the getattr call will fail with
4065          *      an ESTALE error. Shouldn't be a problem,
4066          *      though, since fattr->valid will remain unset.
4067          */
4068         decode_getfattr(&xdr, res->fattr, res->server);
4069 out:
4070         return status;
4071 }
4072
4073 /*
4074  * Decode OPEN response
4075  */
4076 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4077 {
4078         struct xdr_stream xdr;
4079         struct compound_hdr hdr;
4080         int status;
4081
4082         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4083         status = decode_compound_hdr(&xdr, &hdr);
4084         if (status)
4085                 goto out;
4086         status = decode_putfh(&xdr);
4087         if (status)
4088                 goto out;
4089         status = decode_savefh(&xdr);
4090         if (status)
4091                 goto out;
4092         status = decode_open(&xdr, res);
4093         if (status)
4094                 goto out;
4095         if (decode_getfh(&xdr, &res->fh) != 0)
4096                 goto out;
4097         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4098                 goto out;
4099         if (decode_restorefh(&xdr) != 0)
4100                 goto out;
4101         decode_getfattr(&xdr, res->dir_attr, res->server);
4102 out:
4103         return status;
4104 }
4105
4106 /*
4107  * Decode OPEN_CONFIRM response
4108  */
4109 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4110 {
4111         struct xdr_stream xdr;
4112         struct compound_hdr hdr;
4113         int status;
4114
4115         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4116         status = decode_compound_hdr(&xdr, &hdr);
4117         if (status)
4118                 goto out;
4119         status = decode_putfh(&xdr);
4120         if (status)
4121                 goto out;
4122         status = decode_open_confirm(&xdr, res);
4123 out:
4124         return status;
4125 }
4126
4127 /*
4128  * Decode OPEN response
4129  */
4130 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4131 {
4132         struct xdr_stream xdr;
4133         struct compound_hdr hdr;
4134         int status;
4135
4136         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4137         status = decode_compound_hdr(&xdr, &hdr);
4138         if (status)
4139                 goto out;
4140         status = decode_putfh(&xdr);
4141         if (status)
4142                 goto out;
4143         status = decode_open(&xdr, res);
4144         if (status)
4145                 goto out;
4146         decode_getfattr(&xdr, res->f_attr, res->server);
4147 out:
4148         return status;
4149 }
4150
4151 /*
4152  * Decode SETATTR response
4153  */
4154 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4155 {
4156         struct xdr_stream xdr;
4157         struct compound_hdr hdr;
4158         int status;
4159
4160         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4161         status = decode_compound_hdr(&xdr, &hdr);
4162         if (status)
4163                 goto out;
4164         status = decode_putfh(&xdr);
4165         if (status)
4166                 goto out;
4167         status = decode_setattr(&xdr, res);
4168         if (status)
4169                 goto out;
4170         status = decode_getfattr(&xdr, res->fattr, res->server);
4171         if (status == NFS4ERR_DELAY)
4172                 status = 0;
4173 out:
4174         return status;
4175 }
4176
4177 /*
4178  * Decode LOCK response
4179  */
4180 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4181 {
4182         struct xdr_stream xdr;
4183         struct compound_hdr hdr;
4184         int status;
4185
4186         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4187         status = decode_compound_hdr(&xdr, &hdr);
4188         if (status)
4189                 goto out;
4190         status = decode_putfh(&xdr);
4191         if (status)
4192                 goto out;
4193         status = decode_lock(&xdr, res);
4194 out:
4195         return status;
4196 }
4197
4198 /*
4199  * Decode LOCKT response
4200  */
4201 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4202 {
4203         struct xdr_stream xdr;
4204         struct compound_hdr hdr;
4205         int status;
4206
4207         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4208         status = decode_compound_hdr(&xdr, &hdr);
4209         if (status)
4210                 goto out;
4211         status = decode_putfh(&xdr);
4212         if (status)
4213                 goto out;
4214         status = decode_lockt(&xdr, res);
4215 out:
4216         return status;
4217 }
4218
4219 /*
4220  * Decode LOCKU response
4221  */
4222 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4223 {
4224         struct xdr_stream xdr;
4225         struct compound_hdr hdr;
4226         int status;
4227
4228         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4229         status = decode_compound_hdr(&xdr, &hdr);
4230         if (status)
4231                 goto out;
4232         status = decode_putfh(&xdr);
4233         if (status)
4234                 goto out;
4235         status = decode_locku(&xdr, res);
4236 out:
4237         return status;
4238 }
4239
4240 /*
4241  * Decode READLINK response
4242  */
4243 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4244 {
4245         struct xdr_stream xdr;
4246         struct compound_hdr hdr;
4247         int status;
4248
4249         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4250         status = decode_compound_hdr(&xdr, &hdr);
4251         if (status)
4252                 goto out;
4253         status = decode_putfh(&xdr);
4254         if (status)
4255                 goto out;
4256         status = decode_readlink(&xdr, rqstp);
4257 out:
4258         return status;
4259 }
4260
4261 /*
4262  * Decode READDIR response
4263  */
4264 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4265 {
4266         struct xdr_stream xdr;
4267         struct compound_hdr hdr;
4268         int status;
4269
4270         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4271         status = decode_compound_hdr(&xdr, &hdr);
4272         if (status)
4273                 goto out;
4274         status = decode_putfh(&xdr);
4275         if (status)
4276                 goto out;
4277         status = decode_readdir(&xdr, rqstp, res);
4278 out:
4279         return status;
4280 }
4281
4282 /*
4283  * Decode Read response
4284  */
4285 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4286 {
4287         struct xdr_stream xdr;
4288         struct compound_hdr hdr;
4289         int status;
4290
4291         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4292         status = decode_compound_hdr(&xdr, &hdr);
4293         if (status)
4294                 goto out;
4295         status = decode_putfh(&xdr);
4296         if (status)
4297                 goto out;
4298         status = decode_read(&xdr, rqstp, res);
4299         if (!status)
4300                 status = res->count;
4301 out:
4302         return status;
4303 }
4304
4305 /*
4306  * Decode WRITE response
4307  */
4308 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4309 {
4310         struct xdr_stream xdr;
4311         struct compound_hdr hdr;
4312         int status;
4313
4314         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4315         status = decode_compound_hdr(&xdr, &hdr);
4316         if (status)
4317                 goto out;
4318         status = decode_putfh(&xdr);
4319         if (status)
4320                 goto out;
4321         status = decode_write(&xdr, res);
4322         if (status)
4323                 goto out;
4324         decode_getfattr(&xdr, res->fattr, res->server);
4325         if (!status)
4326                 status = res->count;
4327 out:
4328         return status;
4329 }
4330
4331 /*
4332  * Decode COMMIT response
4333  */
4334 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4335 {
4336         struct xdr_stream xdr;
4337         struct compound_hdr hdr;
4338         int status;
4339
4340         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4341         status = decode_compound_hdr(&xdr, &hdr);
4342         if (status)
4343                 goto out;
4344         status = decode_putfh(&xdr);
4345         if (status)
4346                 goto out;
4347         status = decode_commit(&xdr, res);
4348         if (status)
4349                 goto out;
4350         decode_getfattr(&xdr, res->fattr, res->server);
4351 out:
4352         return status;
4353 }
4354
4355 /*
4356  * FSINFO request
4357  */
4358 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4359 {
4360         struct xdr_stream xdr;
4361         struct compound_hdr hdr;
4362         int status;
4363
4364         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4365         status = decode_compound_hdr(&xdr, &hdr);
4366         if (!status)
4367                 status = decode_putfh(&xdr);
4368         if (!status)
4369                 status = decode_fsinfo(&xdr, fsinfo);
4370         if (!status)
4371                 status = -nfs4_stat_to_errno(hdr.status);
4372         return status;
4373 }
4374
4375 /*
4376  * PATHCONF request
4377  */
4378 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4379 {
4380         struct xdr_stream xdr;
4381         struct compound_hdr hdr;
4382         int status;
4383
4384         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4385         status = decode_compound_hdr(&xdr, &hdr);
4386         if (!status)
4387                 status = decode_putfh(&xdr);
4388         if (!status)
4389                 status = decode_pathconf(&xdr, pathconf);
4390         return status;
4391 }
4392
4393 /*
4394  * STATFS request
4395  */
4396 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4397 {
4398         struct xdr_stream xdr;
4399         struct compound_hdr hdr;
4400         int status;
4401
4402         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4403         status = decode_compound_hdr(&xdr, &hdr);
4404         if (!status)
4405                 status = decode_putfh(&xdr);
4406         if (!status)
4407                 status = decode_statfs(&xdr, fsstat);
4408         return status;
4409 }
4410
4411 /*
4412  * GETATTR_BITMAP request
4413  */
4414 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4415 {
4416         struct xdr_stream xdr;
4417         struct compound_hdr hdr;
4418         int status;
4419
4420         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4421         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4422                 goto out;
4423         if ((status = decode_putfh(&xdr)) != 0)
4424                 goto out;
4425         status = decode_server_caps(&xdr, res);
4426 out:
4427         return status;
4428 }
4429
4430 /*
4431  * Decode RENEW response
4432  */
4433 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4434 {
4435         struct xdr_stream xdr;
4436         struct compound_hdr hdr;
4437         int status;
4438
4439         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4440         status = decode_compound_hdr(&xdr, &hdr);
4441         if (!status)
4442                 status = decode_renew(&xdr);
4443         return status;
4444 }
4445
4446 /*
4447  * a SETCLIENTID request
4448  */
4449 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4450                 struct nfs_client *clp)
4451 {
4452         struct xdr_stream xdr;
4453         struct compound_hdr hdr;
4454         int status;
4455
4456         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4457         status = decode_compound_hdr(&xdr, &hdr);
4458         if (!status)
4459                 status = decode_setclientid(&xdr, clp);
4460         if (!status)
4461                 status = -nfs4_stat_to_errno(hdr.status);
4462         return status;
4463 }
4464
4465 /*
4466  * a SETCLIENTID_CONFIRM request
4467  */
4468 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4469 {
4470         struct xdr_stream xdr;
4471         struct compound_hdr hdr;
4472         int status;
4473
4474         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4475         status = decode_compound_hdr(&xdr, &hdr);
4476         if (!status)
4477                 status = decode_setclientid_confirm(&xdr);
4478         if (!status)
4479                 status = decode_putrootfh(&xdr);
4480         if (!status)
4481                 status = decode_fsinfo(&xdr, fsinfo);
4482         if (!status)
4483                 status = -nfs4_stat_to_errno(hdr.status);
4484         return status;
4485 }
4486
4487 /*
4488  * DELEGRETURN request
4489  */
4490 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4491 {
4492         struct xdr_stream xdr;
4493         struct compound_hdr hdr;
4494         int status;
4495
4496         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4497         status = decode_compound_hdr(&xdr, &hdr);
4498         if (status != 0)
4499                 goto out;
4500         status = decode_putfh(&xdr);
4501         if (status != 0)
4502                 goto out;
4503         status = decode_delegreturn(&xdr);
4504         decode_getfattr(&xdr, res->fattr, res->server);
4505 out:
4506         return status;
4507 }
4508
4509 /*
4510  * FS_LOCATIONS request
4511  */
4512 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4513 {
4514         struct xdr_stream xdr;
4515         struct compound_hdr hdr;
4516         int status;
4517
4518         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4519         status = decode_compound_hdr(&xdr, &hdr);
4520         if (status != 0)
4521                 goto out;
4522         if ((status = decode_putfh(&xdr)) != 0)
4523                 goto out;
4524         if ((status = decode_lookup(&xdr)) != 0)
4525                 goto out;
4526         xdr_enter_page(&xdr, PAGE_SIZE);
4527         status = decode_getfattr(&xdr, &res->fattr, res->server);
4528 out:
4529         return status;
4530 }
4531
4532 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4533 {
4534         uint32_t bitmap[2] = {0};
4535         uint32_t len;
4536
4537         if (!*p++) {
4538                 if (!*p)
4539                         return ERR_PTR(-EAGAIN);
4540                 entry->eof = 1;
4541                 return ERR_PTR(-EBADCOOKIE);
4542         }
4543
4544         entry->prev_cookie = entry->cookie;
4545         p = xdr_decode_hyper(p, &entry->cookie);
4546         entry->len = ntohl(*p++);
4547         entry->name = (const char *) p;
4548         p += XDR_QUADLEN(entry->len);
4549
4550         /*
4551          * In case the server doesn't return an inode number,
4552          * we fake one here.  (We don't use inode number 0,
4553          * since glibc seems to choke on it...)
4554          */
4555         entry->ino = 1;
4556
4557         len = ntohl(*p++);              /* bitmap length */
4558         if (len-- > 0) {
4559                 bitmap[0] = ntohl(*p++);
4560                 if (len-- > 0) {
4561                         bitmap[1] = ntohl(*p++);
4562                         p += len;
4563                 }
4564         }
4565         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4566         if (len > 0) {
4567                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4568                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4569                         /* Ignore the return value of rdattr_error for now */
4570                         p++;
4571                         len--;
4572                 }
4573                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4574                         xdr_decode_hyper(p, &entry->ino);
4575                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4576                         xdr_decode_hyper(p, &entry->ino);
4577                 p += len;
4578         }
4579
4580         entry->eof = !p[0] && p[1];
4581         return p;
4582 }
4583
4584 /*
4585  * We need to translate between nfs status return values and
4586  * the local errno values which may not be the same.
4587  */
4588 static struct {
4589         int stat;
4590         int errno;
4591 } nfs_errtbl[] = {
4592         { NFS4_OK,              0               },
4593         { NFS4ERR_PERM,         EPERM           },
4594         { NFS4ERR_NOENT,        ENOENT          },
4595         { NFS4ERR_IO,           errno_NFSERR_IO },
4596         { NFS4ERR_NXIO,         ENXIO           },
4597         { NFS4ERR_ACCESS,       EACCES          },
4598         { NFS4ERR_EXIST,        EEXIST          },
4599         { NFS4ERR_XDEV,         EXDEV           },
4600         { NFS4ERR_NOTDIR,       ENOTDIR         },
4601         { NFS4ERR_ISDIR,        EISDIR          },
4602         { NFS4ERR_INVAL,        EINVAL          },
4603         { NFS4ERR_FBIG,         EFBIG           },
4604         { NFS4ERR_NOSPC,        ENOSPC          },
4605         { NFS4ERR_ROFS,         EROFS           },
4606         { NFS4ERR_MLINK,        EMLINK          },
4607         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4608         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4609         { NFS4ERR_DQUOT,        EDQUOT          },
4610         { NFS4ERR_STALE,        ESTALE          },
4611         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4612         { NFS4ERR_BADOWNER,     EINVAL          },
4613         { NFS4ERR_BADNAME,      EINVAL          },
4614         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4615         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4616         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4617         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4618         { NFS4ERR_BADTYPE,      EBADTYPE        },
4619         { NFS4ERR_LOCKED,       EAGAIN          },
4620         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4621         { NFS4ERR_SYMLINK,      ELOOP           },
4622         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4623         { NFS4ERR_DEADLOCK,     EDEADLK         },
4624         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4625                                                     * to be handled by a
4626                                                     * middle-layer.
4627                                                     */
4628         { -1,                   EIO             }
4629 };
4630
4631 /*
4632  * Convert an NFS error code to a local one.
4633  * This one is used jointly by NFSv2 and NFSv3.
4634  */
4635 static int
4636 nfs4_stat_to_errno(int stat)
4637 {
4638         int i;
4639         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4640                 if (nfs_errtbl[i].stat == stat)
4641                         return nfs_errtbl[i].errno;
4642         }
4643         if (stat <= 10000 || stat > 10100) {
4644                 /* The server is looney tunes. */
4645                 return ESERVERFAULT;
4646         }
4647         /* If we cannot translate the error, the recovery routines should
4648          * handle it.
4649          * Note: remaining NFSv4 error codes have values > 10000, so should
4650          * not conflict with native Linux error codes.
4651          */
4652         return stat;
4653 }
4654
4655 #define PROC(proc, argtype, restype)                            \
4656 [NFSPROC4_CLNT_##proc] = {                                      \
4657         .p_proc   = NFSPROC4_COMPOUND,                          \
4658         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4659         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4660         .p_arglen = NFS4_##argtype##_sz,                        \
4661         .p_replen = NFS4_##restype##_sz,                        \
4662         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4663         .p_name   = #proc,                                      \
4664     }
4665
4666 struct rpc_procinfo     nfs4_procedures[] = {
4667   PROC(READ,            enc_read,       dec_read),
4668   PROC(WRITE,           enc_write,      dec_write),
4669   PROC(COMMIT,          enc_commit,     dec_commit),
4670   PROC(OPEN,            enc_open,       dec_open),
4671   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4672   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4673   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4674   PROC(CLOSE,           enc_close,      dec_close),
4675   PROC(SETATTR,         enc_setattr,    dec_setattr),
4676   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4677   PROC(RENEW,           enc_renew,      dec_renew),
4678   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4679   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4680   PROC(LOCK,            enc_lock,       dec_lock),
4681   PROC(LOCKT,           enc_lockt,      dec_lockt),
4682   PROC(LOCKU,           enc_locku,      dec_locku),
4683   PROC(ACCESS,          enc_access,     dec_access),
4684   PROC(GETATTR,         enc_getattr,    dec_getattr),
4685   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4686   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4687   PROC(REMOVE,          enc_remove,     dec_remove),
4688   PROC(RENAME,          enc_rename,     dec_rename),
4689   PROC(LINK,            enc_link,       dec_link),
4690   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4691   PROC(CREATE,          enc_create,     dec_create),
4692   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4693   PROC(STATFS,          enc_statfs,     dec_statfs),
4694   PROC(READLINK,        enc_readlink,   dec_readlink),
4695   PROC(READDIR,         enc_readdir,    dec_readdir),
4696   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4697   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4698   PROC(GETACL,          enc_getacl,     dec_getacl),
4699   PROC(SETACL,          enc_setacl,     dec_setacl),
4700   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4701 };
4702
4703 struct rpc_version              nfs_version4 = {
4704         .number                 = 4,
4705         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4706         .procs                  = nfs4_procedures
4707 };
4708
4709 /*
4710  * Local variables:
4711  *  c-basic-offset: 8
4712  * End:
4713  */