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

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (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         __be32 *p;
1205
1206         RESERVE_SPACE(4);
1207         WRITE32(OP_READLINK);
1208
1209         return 0;
1210 }
1211
1212 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1213 {
1214         __be32 *p;
1215
1216         RESERVE_SPACE(8 + name->len);
1217         WRITE32(OP_REMOVE);
1218         WRITE32(name->len);
1219         WRITEMEM(name->name, name->len);
1220
1221         return 0;
1222 }
1223
1224 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1225 {
1226         __be32 *p;
1227
1228         RESERVE_SPACE(8 + oldname->len);
1229         WRITE32(OP_RENAME);
1230         WRITE32(oldname->len);
1231         WRITEMEM(oldname->name, oldname->len);
1232
1233         RESERVE_SPACE(4 + newname->len);
1234         WRITE32(newname->len);
1235         WRITEMEM(newname->name, newname->len);
1236
1237         return 0;
1238 }
1239
1240 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1241 {
1242         __be32 *p;
1243
1244         RESERVE_SPACE(12);
1245         WRITE32(OP_RENEW);
1246         WRITE64(client_stateid->cl_clientid);
1247
1248         return 0;
1249 }
1250
1251 static int
1252 encode_restorefh(struct xdr_stream *xdr)
1253 {
1254         __be32 *p;
1255
1256         RESERVE_SPACE(4);
1257         WRITE32(OP_RESTOREFH);
1258
1259         return 0;
1260 }
1261
1262 static int
1263 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1264 {
1265         __be32 *p;
1266
1267         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1268         WRITE32(OP_SETATTR);
1269         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1270         RESERVE_SPACE(2*4);
1271         WRITE32(1);
1272         WRITE32(FATTR4_WORD0_ACL);
1273         if (arg->acl_len % 4)
1274                 return -EINVAL;
1275         RESERVE_SPACE(4);
1276         WRITE32(arg->acl_len);
1277         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1278         return 0;
1279 }
1280
1281 static int
1282 encode_savefh(struct xdr_stream *xdr)
1283 {
1284         __be32 *p;
1285
1286         RESERVE_SPACE(4);
1287         WRITE32(OP_SAVEFH);
1288
1289         return 0;
1290 }
1291
1292 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1293 {
1294         int status;
1295         __be32 *p;
1296
1297         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1298         WRITE32(OP_SETATTR);
1299         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1300
1301         if ((status = encode_attrs(xdr, arg->iap, server)))
1302                 return status;
1303
1304         return 0;
1305 }
1306
1307 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1308 {
1309         __be32 *p;
1310
1311         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1312         WRITE32(OP_SETCLIENTID);
1313         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1314
1315         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1316         RESERVE_SPACE(4);
1317         WRITE32(setclientid->sc_prog);
1318         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1319         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1320         RESERVE_SPACE(4);
1321         WRITE32(setclientid->sc_cb_ident);
1322
1323         return 0;
1324 }
1325
1326 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1327 {
1328         __be32 *p;
1329
1330         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1331         WRITE32(OP_SETCLIENTID_CONFIRM);
1332         WRITE64(client_state->cl_clientid);
1333         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1334
1335         return 0;
1336 }
1337
1338 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1339 {
1340         __be32 *p;
1341
1342         RESERVE_SPACE(4);
1343         WRITE32(OP_WRITE);
1344
1345         encode_stateid(xdr, args->context);
1346
1347         RESERVE_SPACE(16);
1348         WRITE64(args->offset);
1349         WRITE32(args->stable);
1350         WRITE32(args->count);
1351
1352         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1353
1354         return 0;
1355 }
1356
1357 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1358 {
1359         __be32 *p;
1360
1361         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1362
1363         WRITE32(OP_DELEGRETURN);
1364         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1365         return 0;
1366
1367 }
1368 /*
1369  * END OF "GENERIC" ENCODE ROUTINES.
1370  */
1371
1372 /*
1373  * Encode an ACCESS request
1374  */
1375 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1376 {
1377         struct xdr_stream xdr;
1378         struct compound_hdr hdr = {
1379                 .nops = 2,
1380         };
1381         int status;
1382
1383         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1384         encode_compound_hdr(&xdr, &hdr);
1385         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1386                 status = encode_access(&xdr, args->access);
1387         return status;
1388 }
1389
1390 /*
1391  * Encode LOOKUP request
1392  */
1393 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1394 {
1395         struct xdr_stream xdr;
1396         struct compound_hdr hdr = {
1397                 .nops = 4,
1398         };
1399         int status;
1400
1401         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1402         encode_compound_hdr(&xdr, &hdr);
1403         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1404                 goto out;
1405         if ((status = encode_lookup(&xdr, args->name)) != 0)
1406                 goto out;
1407         if ((status = encode_getfh(&xdr)) != 0)
1408                 goto out;
1409         status = encode_getfattr(&xdr, args->bitmask);
1410 out:
1411         return status;
1412 }
1413
1414 /*
1415  * Encode LOOKUP_ROOT request
1416  */
1417 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1418 {
1419         struct xdr_stream xdr;
1420         struct compound_hdr hdr = {
1421                 .nops = 3,
1422         };
1423         int status;
1424
1425         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1426         encode_compound_hdr(&xdr, &hdr);
1427         if ((status = encode_putrootfh(&xdr)) != 0)
1428                 goto out;
1429         if ((status = encode_getfh(&xdr)) == 0)
1430                 status = encode_getfattr(&xdr, args->bitmask);
1431 out:
1432         return status;
1433 }
1434
1435 /*
1436  * Encode REMOVE request
1437  */
1438 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1439 {
1440         struct xdr_stream xdr;
1441         struct compound_hdr hdr = {
1442                 .nops = 3,
1443         };
1444         int status;
1445
1446         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1447         encode_compound_hdr(&xdr, &hdr);
1448         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1449                 goto out;
1450         if ((status = encode_remove(&xdr, &args->name)) != 0)
1451                 goto out;
1452         status = encode_getfattr(&xdr, args->bitmask);
1453 out:
1454         return status;
1455 }
1456
1457 /*
1458  * Encode RENAME request
1459  */
1460 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1461 {
1462         struct xdr_stream xdr;
1463         struct compound_hdr hdr = {
1464                 .nops = 7,
1465         };
1466         int status;
1467
1468         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1469         encode_compound_hdr(&xdr, &hdr);
1470         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1471                 goto out;
1472         if ((status = encode_savefh(&xdr)) != 0)
1473                 goto out;
1474         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1475                 goto out;
1476         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1477                 goto out;
1478         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1479                 goto out;
1480         if ((status = encode_restorefh(&xdr)) != 0)
1481                 goto out;
1482         status = encode_getfattr(&xdr, args->bitmask);
1483 out:
1484         return status;
1485 }
1486
1487 /*
1488  * Encode LINK request
1489  */
1490 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1491 {
1492         struct xdr_stream xdr;
1493         struct compound_hdr hdr = {
1494                 .nops = 7,
1495         };
1496         int status;
1497
1498         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1499         encode_compound_hdr(&xdr, &hdr);
1500         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1501                 goto out;
1502         if ((status = encode_savefh(&xdr)) != 0)
1503                 goto out;
1504         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1505                 goto out;
1506         if ((status = encode_link(&xdr, args->name)) != 0)
1507                 goto out;
1508         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1509                 goto out;
1510         if ((status = encode_restorefh(&xdr)) != 0)
1511                 goto out;
1512         status = encode_getfattr(&xdr, args->bitmask);
1513 out:
1514         return status;
1515 }
1516
1517 /*
1518  * Encode CREATE request
1519  */
1520 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1521 {
1522         struct xdr_stream xdr;
1523         struct compound_hdr hdr = {
1524                 .nops = 7,
1525         };
1526         int status;
1527
1528         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1529         encode_compound_hdr(&xdr, &hdr);
1530         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1531                 goto out;
1532         if ((status = encode_savefh(&xdr)) != 0)
1533                 goto out;
1534         if ((status = encode_create(&xdr, args)) != 0)
1535                 goto out;
1536         if ((status = encode_getfh(&xdr)) != 0)
1537                 goto out;
1538         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1539                 goto out;
1540         if ((status = encode_restorefh(&xdr)) != 0)
1541                 goto out;
1542         status = encode_getfattr(&xdr, args->bitmask);
1543 out:
1544         return status;
1545 }
1546
1547 /*
1548  * Encode SYMLINK request
1549  */
1550 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1551 {
1552         return nfs4_xdr_enc_create(req, p, args);
1553 }
1554
1555 /*
1556  * Encode GETATTR request
1557  */
1558 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1559 {
1560         struct xdr_stream xdr;
1561         struct compound_hdr hdr = {
1562                 .nops = 2,
1563         };
1564         int status;
1565
1566         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1567         encode_compound_hdr(&xdr, &hdr);
1568         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1569                 status = encode_getfattr(&xdr, args->bitmask);
1570         return status;
1571 }
1572
1573 /*
1574  * Encode a CLOSE request
1575  */
1576 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1577 {
1578         struct xdr_stream xdr;
1579         struct compound_hdr hdr = {
1580                 .nops   = 3,
1581         };
1582         int status;
1583
1584         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1585         encode_compound_hdr(&xdr, &hdr);
1586         status = encode_putfh(&xdr, args->fh);
1587         if(status)
1588                 goto out;
1589         status = encode_close(&xdr, args);
1590         if (status != 0)
1591                 goto out;
1592         status = encode_getfattr(&xdr, args->bitmask);
1593 out:
1594         return status;
1595 }
1596
1597 /*
1598  * Encode an OPEN request
1599  */
1600 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1601 {
1602         struct xdr_stream xdr;
1603         struct compound_hdr hdr = {
1604                 .nops = 7,
1605         };
1606         int status;
1607
1608         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1609         encode_compound_hdr(&xdr, &hdr);
1610         status = encode_putfh(&xdr, args->fh);
1611         if (status)
1612                 goto out;
1613         status = encode_savefh(&xdr);
1614         if (status)
1615                 goto out;
1616         status = encode_open(&xdr, args);
1617         if (status)
1618                 goto out;
1619         status = encode_getfh(&xdr);
1620         if (status)
1621                 goto out;
1622         status = encode_getfattr(&xdr, args->bitmask);
1623         if (status)
1624                 goto out;
1625         status = encode_restorefh(&xdr);
1626         if (status)
1627                 goto out;
1628         status = encode_getfattr(&xdr, args->bitmask);
1629 out:
1630         return status;
1631 }
1632
1633 /*
1634  * Encode an OPEN_CONFIRM request
1635  */
1636 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1637 {
1638         struct xdr_stream xdr;
1639         struct compound_hdr hdr = {
1640                 .nops   = 2,
1641         };
1642         int status;
1643
1644         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1645         encode_compound_hdr(&xdr, &hdr);
1646         status = encode_putfh(&xdr, args->fh);
1647         if(status)
1648                 goto out;
1649         status = encode_open_confirm(&xdr, args);
1650 out:
1651         return status;
1652 }
1653
1654 /*
1655  * Encode an OPEN request with no attributes.
1656  */
1657 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1658 {
1659         struct xdr_stream xdr;
1660         struct compound_hdr hdr = {
1661                 .nops   = 3,
1662         };
1663         int status;
1664
1665         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1666         encode_compound_hdr(&xdr, &hdr);
1667         status = encode_putfh(&xdr, args->fh);
1668         if (status)
1669                 goto out;
1670         status = encode_open(&xdr, args);
1671         if (status)
1672                 goto out;
1673         status = encode_getfattr(&xdr, args->bitmask);
1674 out:
1675         return status;
1676 }
1677
1678 /*
1679  * Encode an OPEN_DOWNGRADE request
1680  */
1681 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1682 {
1683         struct xdr_stream xdr;
1684         struct compound_hdr hdr = {
1685                 .nops   = 3,
1686         };
1687         int status;
1688
1689         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1690         encode_compound_hdr(&xdr, &hdr);
1691         status = encode_putfh(&xdr, args->fh);
1692         if (status)
1693                 goto out;
1694         status = encode_open_downgrade(&xdr, args);
1695         if (status != 0)
1696                 goto out;
1697         status = encode_getfattr(&xdr, args->bitmask);
1698 out:
1699         return status;
1700 }
1701
1702 /*
1703  * Encode a LOCK request
1704  */
1705 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1706 {
1707         struct xdr_stream xdr;
1708         struct compound_hdr hdr = {
1709                 .nops   = 2,
1710         };
1711         int status;
1712
1713         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1714         encode_compound_hdr(&xdr, &hdr);
1715         status = encode_putfh(&xdr, args->fh);
1716         if(status)
1717                 goto out;
1718         status = encode_lock(&xdr, args);
1719 out:
1720         return status;
1721 }
1722
1723 /*
1724  * Encode a LOCKT request
1725  */
1726 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1727 {
1728         struct xdr_stream xdr;
1729         struct compound_hdr hdr = {
1730                 .nops   = 2,
1731         };
1732         int status;
1733
1734         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1735         encode_compound_hdr(&xdr, &hdr);
1736         status = encode_putfh(&xdr, args->fh);
1737         if(status)
1738                 goto out;
1739         status = encode_lockt(&xdr, args);
1740 out:
1741         return status;
1742 }
1743
1744 /*
1745  * Encode a LOCKU request
1746  */
1747 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1748 {
1749         struct xdr_stream xdr;
1750         struct compound_hdr hdr = {
1751                 .nops   = 2,
1752         };
1753         int status;
1754
1755         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1756         encode_compound_hdr(&xdr, &hdr);
1757         status = encode_putfh(&xdr, args->fh);
1758         if(status)
1759                 goto out;
1760         status = encode_locku(&xdr, args);
1761 out:
1762         return status;
1763 }
1764
1765 /*
1766  * Encode a READLINK request
1767  */
1768 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1769 {
1770         struct xdr_stream xdr;
1771         struct compound_hdr hdr = {
1772                 .nops = 2,
1773         };
1774         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1775         unsigned int replen;
1776         int status;
1777
1778         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1779         encode_compound_hdr(&xdr, &hdr);
1780         status = encode_putfh(&xdr, args->fh);
1781         if(status)
1782                 goto out;
1783         status = encode_readlink(&xdr, args, req);
1784
1785         /* set up reply kvec
1786          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1787          *      + OP_READLINK + status + string length = 8
1788          */
1789         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1790         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1791                         args->pgbase, args->pglen);
1792
1793 out:
1794         return status;
1795 }
1796
1797 /*
1798  * Encode a READDIR request
1799  */
1800 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1801 {
1802         struct xdr_stream xdr;
1803         struct compound_hdr hdr = {
1804                 .nops = 2,
1805         };
1806         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1807         int replen;
1808         int status;
1809
1810         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1811         encode_compound_hdr(&xdr, &hdr);
1812         status = encode_putfh(&xdr, args->fh);
1813         if(status)
1814                 goto out;
1815         status = encode_readdir(&xdr, args, req);
1816
1817         /* set up reply kvec
1818          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1819          *      + OP_READDIR + status + verifer(2)  = 9
1820          */
1821         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1822         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1823                          args->pgbase, args->count);
1824         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1825                         __FUNCTION__, replen, args->pages,
1826                         args->pgbase, args->count);
1827
1828 out:
1829         return status;
1830 }
1831
1832 /*
1833  * Encode a READ request
1834  */
1835 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1836 {
1837         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1838         struct xdr_stream xdr;
1839         struct compound_hdr hdr = {
1840                 .nops = 2,
1841         };
1842         int replen, status;
1843
1844         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845         encode_compound_hdr(&xdr, &hdr);
1846         status = encode_putfh(&xdr, args->fh);
1847         if (status)
1848                 goto out;
1849         status = encode_read(&xdr, args);
1850         if (status)
1851                 goto out;
1852
1853         /* set up reply kvec
1854          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1855          *       + OP_READ + status + eof + datalen = 9
1856          */
1857         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1858         xdr_inline_pages(&req->rq_rcv_buf, replen,
1859                          args->pages, args->pgbase, args->count);
1860 out:
1861         return status;
1862 }
1863
1864 /*
1865  * Encode an SETATTR request
1866  */
1867 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1868
1869 {
1870         struct xdr_stream xdr;
1871         struct compound_hdr hdr = {
1872                 .nops   = 3,
1873         };
1874         int status;
1875
1876         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1877         encode_compound_hdr(&xdr, &hdr);
1878         status = encode_putfh(&xdr, args->fh);
1879         if(status)
1880                 goto out;
1881         status = encode_setattr(&xdr, args, args->server);
1882         if(status)
1883                 goto out;
1884         status = encode_getfattr(&xdr, args->bitmask);
1885 out:
1886         return status;
1887 }
1888
1889 /*
1890  * Encode a GETACL request
1891  */
1892 static int
1893 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1894                 struct nfs_getaclargs *args)
1895 {
1896         struct xdr_stream xdr;
1897         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1898         struct compound_hdr hdr = {
1899                 .nops   = 2,
1900         };
1901         int replen, status;
1902
1903         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1904         encode_compound_hdr(&xdr, &hdr);
1905         status = encode_putfh(&xdr, args->fh);
1906         if (status)
1907                 goto out;
1908         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1909         /* set up reply buffer: */
1910         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1911         xdr_inline_pages(&req->rq_rcv_buf, replen,
1912                 args->acl_pages, args->acl_pgbase, args->acl_len);
1913 out:
1914         return status;
1915 }
1916
1917 /*
1918  * Encode a WRITE request
1919  */
1920 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1921 {
1922         struct xdr_stream xdr;
1923         struct compound_hdr hdr = {
1924                 .nops = 3,
1925         };
1926         int status;
1927
1928         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1929         encode_compound_hdr(&xdr, &hdr);
1930         status = encode_putfh(&xdr, args->fh);
1931         if (status)
1932                 goto out;
1933         status = encode_write(&xdr, args);
1934         if (status)
1935                 goto out;
1936         status = encode_getfattr(&xdr, args->bitmask);
1937 out:
1938         return status;
1939 }
1940
1941 /*
1942  *  a COMMIT request
1943  */
1944 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1945 {
1946         struct xdr_stream xdr;
1947         struct compound_hdr hdr = {
1948                 .nops = 3,
1949         };
1950         int status;
1951
1952         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1953         encode_compound_hdr(&xdr, &hdr);
1954         status = encode_putfh(&xdr, args->fh);
1955         if (status)
1956                 goto out;
1957         status = encode_commit(&xdr, args);
1958         if (status)
1959                 goto out;
1960         status = encode_getfattr(&xdr, args->bitmask);
1961 out:
1962         return status;
1963 }
1964
1965 /*
1966  * FSINFO request
1967  */
1968 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1969 {
1970         struct xdr_stream xdr;
1971         struct compound_hdr hdr = {
1972                 .nops   = 2,
1973         };
1974         int status;
1975
1976         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1977         encode_compound_hdr(&xdr, &hdr);
1978         status = encode_putfh(&xdr, args->fh);
1979         if (!status)
1980                 status = encode_fsinfo(&xdr, args->bitmask);
1981         return status;
1982 }
1983
1984 /*
1985  * a PATHCONF request
1986  */
1987 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1988 {
1989         struct xdr_stream xdr;
1990         struct compound_hdr hdr = {
1991                 .nops = 2,
1992         };
1993         int status;
1994
1995         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1996         encode_compound_hdr(&xdr, &hdr);
1997         status = encode_putfh(&xdr, args->fh);
1998         if (!status)
1999                 status = encode_getattr_one(&xdr,
2000                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2001         return status;
2002 }
2003
2004 /*
2005  * a STATFS request
2006  */
2007 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2008 {
2009         struct xdr_stream xdr;
2010         struct compound_hdr hdr = {
2011                 .nops = 2,
2012         };
2013         int status;
2014
2015         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2016         encode_compound_hdr(&xdr, &hdr);
2017         status = encode_putfh(&xdr, args->fh);
2018         if (status == 0)
2019                 status = encode_getattr_two(&xdr,
2020                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2021                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2022         return status;
2023 }
2024
2025 /*
2026  * GETATTR_BITMAP request
2027  */
2028 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2029 {
2030         struct xdr_stream xdr;
2031         struct compound_hdr hdr = {
2032                 .nops = 2,
2033         };
2034         int status;
2035
2036         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2037         encode_compound_hdr(&xdr, &hdr);
2038         status = encode_putfh(&xdr, fhandle);
2039         if (status == 0)
2040                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2041                                 FATTR4_WORD0_LINK_SUPPORT|
2042                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2043                                 FATTR4_WORD0_ACLSUPPORT);
2044         return status;
2045 }
2046
2047 /*
2048  * a RENEW request
2049  */
2050 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2051 {
2052         struct xdr_stream xdr;
2053         struct compound_hdr hdr = {
2054                 .nops   = 1,
2055         };
2056
2057         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2058         encode_compound_hdr(&xdr, &hdr);
2059         return encode_renew(&xdr, clp);
2060 }
2061
2062 /*
2063  * a SETCLIENTID request
2064  */
2065 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2066 {
2067         struct xdr_stream xdr;
2068         struct compound_hdr hdr = {
2069                 .nops   = 1,
2070         };
2071
2072         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073         encode_compound_hdr(&xdr, &hdr);
2074         return encode_setclientid(&xdr, sc);
2075 }
2076
2077 /*
2078  * a SETCLIENTID_CONFIRM request
2079  */
2080 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2081 {
2082         struct xdr_stream xdr;
2083         struct compound_hdr hdr = {
2084                 .nops   = 3,
2085         };
2086         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2087         int status;
2088
2089         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2090         encode_compound_hdr(&xdr, &hdr);
2091         status = encode_setclientid_confirm(&xdr, clp);
2092         if (!status)
2093                 status = encode_putrootfh(&xdr);
2094         if (!status)
2095                 status = encode_fsinfo(&xdr, lease_bitmap);
2096         return status;
2097 }
2098
2099 /*
2100  * DELEGRETURN request
2101  */
2102 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2103 {
2104         struct xdr_stream xdr;
2105         struct compound_hdr hdr = {
2106                 .nops = 3,
2107         };
2108         int status;
2109
2110         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2111         encode_compound_hdr(&xdr, &hdr);
2112         status = encode_putfh(&xdr, args->fhandle);
2113         if (status != 0)
2114                 goto out;
2115         status = encode_delegreturn(&xdr, args->stateid);
2116         if (status != 0)
2117                 goto out;
2118         status = encode_getfattr(&xdr, args->bitmask);
2119 out:
2120         return status;
2121 }
2122
2123 /*
2124  * Encode FS_LOCATIONS request
2125  */
2126 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2127 {
2128         struct xdr_stream xdr;
2129         struct compound_hdr hdr = {
2130                 .nops = 3,
2131         };
2132         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2133         int replen;
2134         int status;
2135
2136         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2137         encode_compound_hdr(&xdr, &hdr);
2138         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2139                 goto out;
2140         if ((status = encode_lookup(&xdr, args->name)) != 0)
2141                 goto out;
2142         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2143                 goto out;
2144         /* set up reply
2145          *   toplevel_status + OP_PUTFH + status
2146          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2147          */
2148         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2149         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2150                         0, PAGE_SIZE);
2151 out:
2152         return status;
2153 }
2154
2155 /*
2156  * START OF "GENERIC" DECODE ROUTINES.
2157  *   These may look a little ugly since they are imported from a "generic"
2158  * set of XDR encode/decode routines which are intended to be shared by
2159  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2160  *
2161  * If the pain of reading these is too great, it should be a straightforward
2162  * task to translate them into Linux-specific versions which are more
2163  * consistent with the style used in NFSv2/v3...
2164  */
2165 #define READ32(x)         (x) = ntohl(*p++)
2166 #define READ64(x)         do {                  \
2167         (x) = (u64)ntohl(*p++) << 32;           \
2168         (x) |= ntohl(*p++);                     \
2169 } while (0)
2170 #define READTIME(x)       do {                  \
2171         p++;                                    \
2172         (x.tv_sec) = ntohl(*p++);               \
2173         (x.tv_nsec) = ntohl(*p++);              \
2174 } while (0)
2175 #define COPYMEM(x,nbytes) do {                  \
2176         memcpy((x), p, nbytes);                 \
2177         p += XDR_QUADLEN(nbytes);               \
2178 } while (0)
2179
2180 #define READ_BUF(nbytes)  do { \
2181         p = xdr_inline_decode(xdr, nbytes); \
2182         if (unlikely(!p)) { \
2183                 printk(KERN_INFO "%s: prematurely hit end of receive" \
2184                                 " buffer\n", __FUNCTION__); \
2185                 printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2186                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2187                 return -EIO; \
2188         } \
2189 } while (0)
2190
2191 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2192 {
2193         __be32 *p;
2194
2195         READ_BUF(4);
2196         READ32(*len);
2197         READ_BUF(*len);
2198         *string = (char *)p;
2199         return 0;
2200 }
2201
2202 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2203 {
2204         __be32 *p;
2205
2206         READ_BUF(8);
2207         READ32(hdr->status);
2208         READ32(hdr->taglen);
2209
2210         READ_BUF(hdr->taglen + 4);
2211         hdr->tag = (char *)p;
2212         p += XDR_QUADLEN(hdr->taglen);
2213         READ32(hdr->nops);
2214         return 0;
2215 }
2216
2217 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2218 {
2219         __be32 *p;
2220         uint32_t opnum;
2221         int32_t nfserr;
2222
2223         READ_BUF(8);
2224         READ32(opnum);
2225         if (opnum != expected) {
2226                 printk(KERN_NOTICE
2227                                 "nfs4_decode_op_hdr: Server returned operation"
2228                                 " %d but we issued a request for %d\n",
2229                                 opnum, expected);
2230                 return -EIO;
2231         }
2232         READ32(nfserr);
2233         if (nfserr != NFS_OK)
2234                 return -nfs4_stat_to_errno(nfserr);
2235         return 0;
2236 }
2237
2238 /* Dummy routine */
2239 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2240 {
2241         __be32 *p;
2242         unsigned int strlen;
2243         char *str;
2244
2245         READ_BUF(12);
2246         return decode_opaque_inline(xdr, &strlen, &str);
2247 }
2248
2249 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2250 {
2251         uint32_t bmlen;
2252         __be32 *p;
2253
2254         READ_BUF(4);
2255         READ32(bmlen);
2256
2257         bitmap[0] = bitmap[1] = 0;
2258         READ_BUF((bmlen << 2));
2259         if (bmlen > 0) {
2260                 READ32(bitmap[0]);
2261                 if (bmlen > 1)
2262                         READ32(bitmap[1]);
2263         }
2264         return 0;
2265 }
2266
2267 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2268 {
2269         __be32 *p;
2270
2271         READ_BUF(4);
2272         READ32(*attrlen);
2273         *savep = xdr->p;
2274         return 0;
2275 }
2276
2277 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2278 {
2279         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2280                 decode_attr_bitmap(xdr, bitmask);
2281                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2282         } else
2283                 bitmask[0] = bitmask[1] = 0;
2284         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2285         return 0;
2286 }
2287
2288 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2289 {
2290         __be32 *p;
2291
2292         *type = 0;
2293         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2294                 return -EIO;
2295         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2296                 READ_BUF(4);
2297                 READ32(*type);
2298                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2299                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2300                         return -EIO;
2301                 }
2302                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2303         }
2304         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2305         return 0;
2306 }
2307
2308 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2309 {
2310         __be32 *p;
2311
2312         *change = 0;
2313         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2314                 return -EIO;
2315         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2316                 READ_BUF(8);
2317                 READ64(*change);
2318                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2319         }
2320         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2321                         (unsigned long long)*change);
2322         return 0;
2323 }
2324
2325 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2326 {
2327         __be32 *p;
2328
2329         *size = 0;
2330         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2331                 return -EIO;
2332         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2333                 READ_BUF(8);
2334                 READ64(*size);
2335                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2336         }
2337         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2338         return 0;
2339 }
2340
2341 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2342 {
2343         __be32 *p;
2344
2345         *res = 0;
2346         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2347                 return -EIO;
2348         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2349                 READ_BUF(4);
2350                 READ32(*res);
2351                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2352         }
2353         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2354         return 0;
2355 }
2356
2357 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2358 {
2359         __be32 *p;
2360
2361         *res = 0;
2362         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2363                 return -EIO;
2364         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2365                 READ_BUF(4);
2366                 READ32(*res);
2367                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2368         }
2369         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2370         return 0;
2371 }
2372
2373 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2374 {
2375         __be32 *p;
2376
2377         fsid->major = 0;
2378         fsid->minor = 0;
2379         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2380                 return -EIO;
2381         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2382                 READ_BUF(16);
2383                 READ64(fsid->major);
2384                 READ64(fsid->minor);
2385                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2386         }
2387         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2388                         (unsigned long long)fsid->major,
2389                         (unsigned long long)fsid->minor);
2390         return 0;
2391 }
2392
2393 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2394 {
2395         __be32 *p;
2396
2397         *res = 60;
2398         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2399                 return -EIO;
2400         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2401                 READ_BUF(4);
2402                 READ32(*res);
2403                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2404         }
2405         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2406         return 0;
2407 }
2408
2409 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2410 {
2411         __be32 *p;
2412
2413         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2414         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2415                 return -EIO;
2416         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2417                 READ_BUF(4);
2418                 READ32(*res);
2419                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2420         }
2421         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2422         return 0;
2423 }
2424
2425 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2426 {
2427         __be32 *p;
2428
2429         *fileid = 0;
2430         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2431                 return -EIO;
2432         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2433                 READ_BUF(8);
2434                 READ64(*fileid);
2435                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2436         }
2437         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2438         return 0;
2439 }
2440
2441 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2442 {
2443         __be32 *p;
2444
2445         *fileid = 0;
2446         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2447                 return -EIO;
2448         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2449                 READ_BUF(8);
2450                 READ64(*fileid);
2451                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2452         }
2453         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2454         return 0;
2455 }
2456
2457 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2458 {
2459         __be32 *p;
2460         int status = 0;
2461
2462         *res = 0;
2463         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2464                 return -EIO;
2465         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2466                 READ_BUF(8);
2467                 READ64(*res);
2468                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2469         }
2470         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2471         return status;
2472 }
2473
2474 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2475 {
2476         __be32 *p;
2477         int status = 0;
2478
2479         *res = 0;
2480         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2481                 return -EIO;
2482         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2483                 READ_BUF(8);
2484                 READ64(*res);
2485                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2486         }
2487         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2488         return status;
2489 }
2490
2491 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2492 {
2493         __be32 *p;
2494         int status = 0;
2495
2496         *res = 0;
2497         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2498                 return -EIO;
2499         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2500                 READ_BUF(8);
2501                 READ64(*res);
2502                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2503         }
2504         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2505         return status;
2506 }
2507
2508 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2509 {
2510         int n;
2511         __be32 *p;
2512         int status = 0;
2513
2514         READ_BUF(4);
2515         READ32(n);
2516         if (n < 0)
2517                 goto out_eio;
2518         if (n == 0)
2519                 goto root_path;
2520         dprintk("path ");
2521         path->ncomponents = 0;
2522         while (path->ncomponents < n) {
2523                 struct nfs4_string *component = &path->components[path->ncomponents];
2524                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2525                 if (unlikely(status != 0))
2526                         goto out_eio;
2527                 if (path->ncomponents != n)
2528                         dprintk("/");
2529                 dprintk("%s", component->data);
2530                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2531                         path->ncomponents++;
2532                 else {
2533                         dprintk("cannot parse %d components in path\n", n);
2534                         goto out_eio;
2535                 }
2536         }
2537 out:
2538         dprintk("\n");
2539         return status;
2540 root_path:
2541 /* a root pathname is sent as a zero component4 */
2542         path->ncomponents = 1;
2543         path->components[0].len=0;
2544         path->components[0].data=NULL;
2545         dprintk("path /\n");
2546         goto out;
2547 out_eio:
2548         dprintk(" status %d", status);
2549         status = -EIO;
2550         goto out;
2551 }
2552
2553 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2554 {
2555         int n;
2556         __be32 *p;
2557         int status = -EIO;
2558
2559         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2560                 goto out;
2561         status = 0;
2562         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2563                 goto out;
2564         dprintk("%s: fsroot ", __FUNCTION__);
2565         status = decode_pathname(xdr, &res->fs_path);
2566         if (unlikely(status != 0))
2567                 goto out;
2568         READ_BUF(4);
2569         READ32(n);
2570         if (n <= 0)
2571                 goto out_eio;
2572         res->nlocations = 0;
2573         while (res->nlocations < n) {
2574                 int m;
2575                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2576
2577                 READ_BUF(4);
2578                 READ32(m);
2579                 if (m <= 0)
2580                         goto out_eio;
2581
2582                 loc->nservers = 0;
2583                 dprintk("%s: servers ", __FUNCTION__);
2584                 while (loc->nservers < m) {
2585                         struct nfs4_string *server = &loc->servers[loc->nservers];
2586                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2587                         if (unlikely(status != 0))
2588                                 goto out_eio;
2589                         dprintk("%s ", server->data);
2590                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2591                                 loc->nservers++;
2592                         else {
2593                                 int i;
2594                                 dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
2595                                 for (i = loc->nservers; i < m; i++) {
2596                                         unsigned int len;
2597                                         char *data;
2598                                         status = decode_opaque_inline(xdr, &len, &data);
2599                                         if (unlikely(status != 0))
2600                                                 goto out_eio;
2601                                 }
2602                         }
2603                 }
2604                 status = decode_pathname(xdr, &loc->rootpath);
2605                 if (unlikely(status != 0))
2606                         goto out_eio;
2607                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2608                         res->nlocations++;
2609         }
2610 out:
2611         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2612         return status;
2613 out_eio:
2614         status = -EIO;
2615         goto out;
2616 }
2617
2618 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2619 {
2620         __be32 *p;
2621         int status = 0;
2622
2623         *res = 0;
2624         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2625                 return -EIO;
2626         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2627                 READ_BUF(8);
2628                 READ64(*res);
2629                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2630         }
2631         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2632         return status;
2633 }
2634
2635 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2636 {
2637         __be32 *p;
2638         int status = 0;
2639
2640         *maxlink = 1;
2641         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2642                 return -EIO;
2643         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2644                 READ_BUF(4);
2645                 READ32(*maxlink);
2646                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2647         }
2648         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2649         return status;
2650 }
2651
2652 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2653 {
2654         __be32 *p;
2655         int status = 0;
2656
2657         *maxname = 1024;
2658         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2659                 return -EIO;
2660         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2661                 READ_BUF(4);
2662                 READ32(*maxname);
2663                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2664         }
2665         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2666         return status;
2667 }
2668
2669 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2670 {
2671         __be32 *p;
2672         int status = 0;
2673
2674         *res = 1024;
2675         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2676                 return -EIO;
2677         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2678                 uint64_t maxread;
2679                 READ_BUF(8);
2680                 READ64(maxread);
2681                 if (maxread > 0x7FFFFFFF)
2682                         maxread = 0x7FFFFFFF;
2683                 *res = (uint32_t)maxread;
2684                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2685         }
2686         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2687         return status;
2688 }
2689
2690 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2691 {
2692         __be32 *p;
2693         int status = 0;
2694
2695         *res = 1024;
2696         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2697                 return -EIO;
2698         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2699                 uint64_t maxwrite;
2700                 READ_BUF(8);
2701                 READ64(maxwrite);
2702                 if (maxwrite > 0x7FFFFFFF)
2703                         maxwrite = 0x7FFFFFFF;
2704                 *res = (uint32_t)maxwrite;
2705                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2706         }
2707         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2708         return status;
2709 }
2710
2711 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2712 {
2713         __be32 *p;
2714
2715         *mode = 0;
2716         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2717                 return -EIO;
2718         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2719                 READ_BUF(4);
2720                 READ32(*mode);
2721                 *mode &= ~S_IFMT;
2722                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2723         }
2724         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2725         return 0;
2726 }
2727
2728 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2729 {
2730         __be32 *p;
2731
2732         *nlink = 1;
2733         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2734                 return -EIO;
2735         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2736                 READ_BUF(4);
2737                 READ32(*nlink);
2738                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2739         }
2740         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2741         return 0;
2742 }
2743
2744 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2745 {
2746         uint32_t len;
2747         __be32 *p;
2748
2749         *uid = -2;
2750         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2751                 return -EIO;
2752         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2753                 READ_BUF(4);
2754                 READ32(len);
2755                 READ_BUF(len);
2756                 if (len < XDR_MAX_NETOBJ) {
2757                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2758                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2759                                                 __FUNCTION__);
2760                 } else
2761                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2762                                         __FUNCTION__, len);
2763                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2764         }
2765         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2766         return 0;
2767 }
2768
2769 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2770 {
2771         uint32_t len;
2772         __be32 *p;
2773
2774         *gid = -2;
2775         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2776                 return -EIO;
2777         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2778                 READ_BUF(4);
2779                 READ32(len);
2780                 READ_BUF(len);
2781                 if (len < XDR_MAX_NETOBJ) {
2782                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2783                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2784                                                 __FUNCTION__);
2785                 } else
2786                         printk(KERN_WARNING "%s: name too long (%u)!\n",
2787                                         __FUNCTION__, len);
2788                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2789         }
2790         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2791         return 0;
2792 }
2793
2794 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2795 {
2796         uint32_t major = 0, minor = 0;
2797         __be32 *p;
2798
2799         *rdev = MKDEV(0,0);
2800         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2801                 return -EIO;
2802         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2803                 dev_t tmp;
2804
2805                 READ_BUF(8);
2806                 READ32(major);
2807                 READ32(minor);
2808                 tmp = MKDEV(major, minor);
2809                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2810                         *rdev = tmp;
2811                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2812         }
2813         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2814         return 0;
2815 }
2816
2817 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2818 {
2819         __be32 *p;
2820         int status = 0;
2821
2822         *res = 0;
2823         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2824                 return -EIO;
2825         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2826                 READ_BUF(8);
2827                 READ64(*res);
2828                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2829         }
2830         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2831         return status;
2832 }
2833
2834 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2835 {
2836         __be32 *p;
2837         int status = 0;
2838
2839         *res = 0;
2840         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2841                 return -EIO;
2842         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2843                 READ_BUF(8);
2844                 READ64(*res);
2845                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2846         }
2847         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2848         return status;
2849 }
2850
2851 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2852 {
2853         __be32 *p;
2854         int status = 0;
2855
2856         *res = 0;
2857         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2858                 return -EIO;
2859         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2860                 READ_BUF(8);
2861                 READ64(*res);
2862                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2863         }
2864         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2865         return status;
2866 }
2867
2868 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2869 {
2870         __be32 *p;
2871
2872         *used = 0;
2873         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2874                 return -EIO;
2875         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2876                 READ_BUF(8);
2877                 READ64(*used);
2878                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2879         }
2880         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2881                         (unsigned long long)*used);
2882         return 0;
2883 }
2884
2885 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2886 {
2887         __be32 *p;
2888         uint64_t sec;
2889         uint32_t nsec;
2890
2891         READ_BUF(12);
2892         READ64(sec);
2893         READ32(nsec);
2894         time->tv_sec = (time_t)sec;
2895         time->tv_nsec = (long)nsec;
2896         return 0;
2897 }
2898
2899 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2900 {
2901         int status = 0;
2902
2903         time->tv_sec = 0;
2904         time->tv_nsec = 0;
2905         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2906                 return -EIO;
2907         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2908                 status = decode_attr_time(xdr, time);
2909                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2910         }
2911         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2912         return status;
2913 }
2914
2915 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2916 {
2917         int status = 0;
2918
2919         time->tv_sec = 0;
2920         time->tv_nsec = 0;
2921         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2922                 return -EIO;
2923         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2924                 status = decode_attr_time(xdr, time);
2925                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2926         }
2927         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2928         return status;
2929 }
2930
2931 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2932 {
2933         int status = 0;
2934
2935         time->tv_sec = 0;
2936         time->tv_nsec = 0;
2937         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2938                 return -EIO;
2939         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2940                 status = decode_attr_time(xdr, time);
2941                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2942         }
2943         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2944         return status;
2945 }
2946
2947 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2948 {
2949         unsigned int attrwords = XDR_QUADLEN(attrlen);
2950         unsigned int nwords = xdr->p - savep;
2951
2952         if (unlikely(attrwords != nwords)) {
2953                 printk(KERN_WARNING "%s: server returned incorrect attribute length: %u %c %u\n",
2954                                 __FUNCTION__,
2955                                 attrwords << 2,
2956                                 (attrwords < nwords) ? '<' : '>',
2957                                 nwords << 2);
2958                 return -EIO;
2959         }
2960         return 0;
2961 }
2962
2963 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2964 {
2965         __be32 *p;
2966
2967         READ_BUF(20);
2968         READ32(cinfo->atomic);
2969         READ64(cinfo->before);
2970         READ64(cinfo->after);
2971         return 0;
2972 }
2973
2974 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2975 {
2976         __be32 *p;
2977         uint32_t supp, acc;
2978         int status;
2979
2980         status = decode_op_hdr(xdr, OP_ACCESS);
2981         if (status)
2982                 return status;
2983         READ_BUF(8);
2984         READ32(supp);
2985         READ32(acc);
2986         access->supported = supp;
2987         access->access = acc;
2988         return 0;
2989 }
2990
2991 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
2992 {
2993         __be32 *p;
2994         int status;
2995
2996         status = decode_op_hdr(xdr, OP_CLOSE);
2997         if (status)
2998                 return status;
2999         READ_BUF(NFS4_STATEID_SIZE);
3000         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3001         return 0;
3002 }
3003
3004 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3005 {
3006         __be32 *p;
3007         int status;
3008
3009         status = decode_op_hdr(xdr, OP_COMMIT);
3010         if (status)
3011                 return status;
3012         READ_BUF(8);
3013         COPYMEM(res->verf->verifier, 8);
3014         return 0;
3015 }
3016
3017 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3018 {
3019         __be32 *p;
3020         uint32_t bmlen;
3021         int status;
3022
3023         status = decode_op_hdr(xdr, OP_CREATE);
3024         if (status)
3025                 return status;
3026         if ((status = decode_change_info(xdr, cinfo)))
3027                 return status;
3028         READ_BUF(4);
3029         READ32(bmlen);
3030         READ_BUF(bmlen << 2);
3031         return 0;
3032 }
3033
3034 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3035 {
3036         __be32 *savep;
3037         uint32_t attrlen,
3038                  bitmap[2] = {0};
3039         int status;
3040
3041         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3042                 goto xdr_error;
3043         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3044                 goto xdr_error;
3045         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3046                 goto xdr_error;
3047         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3048                 goto xdr_error;
3049         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3050                 goto xdr_error;
3051         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3052                 goto xdr_error;
3053         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3054                 goto xdr_error;
3055         status = verify_attr_len(xdr, savep, attrlen);
3056 xdr_error:
3057         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3058         return status;
3059 }
3060
3061 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3062 {
3063         __be32 *savep;
3064         uint32_t attrlen,
3065                  bitmap[2] = {0};
3066         int status;
3067
3068         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3069                 goto xdr_error;
3070         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3071                 goto xdr_error;
3072         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3073                 goto xdr_error;
3074
3075         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3076                 goto xdr_error;
3077         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3078                 goto xdr_error;
3079         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3080                 goto xdr_error;
3081         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3082                 goto xdr_error;
3083         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3084                 goto xdr_error;
3085         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3086                 goto xdr_error;
3087
3088         status = verify_attr_len(xdr, savep, attrlen);
3089 xdr_error:
3090         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3091         return status;
3092 }
3093
3094 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3095 {
3096         __be32 *savep;
3097         uint32_t attrlen,
3098                  bitmap[2] = {0};
3099         int status;
3100
3101         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3102                 goto xdr_error;
3103         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3104                 goto xdr_error;
3105         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3106                 goto xdr_error;
3107
3108         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3109                 goto xdr_error;
3110         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3111                 goto xdr_error;
3112
3113         status = verify_attr_len(xdr, savep, attrlen);
3114 xdr_error:
3115         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3116         return status;
3117 }
3118
3119 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3120 {
3121         __be32 *savep;
3122         uint32_t attrlen,
3123                  bitmap[2] = {0},
3124                  type;
3125         int status, fmode = 0;
3126         uint64_t fileid;
3127
3128         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3129                 goto xdr_error;
3130         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3131                 goto xdr_error;
3132
3133         fattr->bitmap[0] = bitmap[0];
3134         fattr->bitmap[1] = bitmap[1];
3135
3136         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3137                 goto xdr_error;
3138
3139
3140         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3141                 goto xdr_error;
3142         fattr->type = nfs_type2fmt[type].nfs2type;
3143         fmode = nfs_type2fmt[type].mode;
3144
3145         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3146                 goto xdr_error;
3147         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3148                 goto xdr_error;
3149         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3150                 goto xdr_error;
3151         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3152                 goto xdr_error;
3153         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3154                                                 struct nfs4_fs_locations,
3155                                                 fattr))) != 0)
3156                 goto xdr_error;
3157         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3158                 goto xdr_error;
3159         fattr->mode |= fmode;
3160         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3161                 goto xdr_error;
3162         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3163                 goto xdr_error;
3164         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3165                 goto xdr_error;
3166         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3167                 goto xdr_error;
3168         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3169                 goto xdr_error;
3170         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3171                 goto xdr_error;
3172         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3173                 goto xdr_error;
3174         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3175                 goto xdr_error;
3176         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3177                 goto xdr_error;
3178         if (fattr->fileid == 0 && fileid != 0)
3179                 fattr->fileid = fileid;
3180         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3181                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3182 xdr_error:
3183         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3184         return status;
3185 }
3186
3187
3188 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3189 {
3190         __be32 *savep;
3191         uint32_t attrlen, bitmap[2];
3192         int status;
3193
3194         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3195                 goto xdr_error;
3196         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3197                 goto xdr_error;
3198         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3199                 goto xdr_error;
3200
3201         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3202
3203         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3204                 goto xdr_error;
3205         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3206                 goto xdr_error;
3207         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3208                 goto xdr_error;
3209         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3210         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3211                 goto xdr_error;
3212         fsinfo->wtpref = fsinfo->wtmax;
3213
3214         status = verify_attr_len(xdr, savep, attrlen);
3215 xdr_error:
3216         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3217         return status;
3218 }
3219
3220 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3221 {
3222         __be32 *p;
3223         uint32_t len;
3224         int status;
3225
3226         /* Zero handle first to allow comparisons */
3227         memset(fh, 0, sizeof(*fh));
3228
3229         status = decode_op_hdr(xdr, OP_GETFH);
3230         if (status)
3231                 return status;
3232
3233         READ_BUF(4);
3234         READ32(len);
3235         if (len > NFS4_FHSIZE)
3236                 return -EIO;
3237         fh->size = len;
3238         READ_BUF(len);
3239         COPYMEM(fh->data, len);
3240         return 0;
3241 }
3242
3243 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3244 {
3245         int status;
3246
3247         status = decode_op_hdr(xdr, OP_LINK);
3248         if (status)
3249                 return status;
3250         return decode_change_info(xdr, cinfo);
3251 }
3252
3253 /*
3254  * We create the owner, so we know a proper owner.id length is 4.
3255  */
3256 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3257 {
3258         uint64_t offset, length, clientid;
3259         __be32 *p;
3260         uint32_t namelen, type;
3261
3262         READ_BUF(32);
3263         READ64(offset);
3264         READ64(length);
3265         READ32(type);
3266         if (fl != NULL) {
3267                 fl->fl_start = (loff_t)offset;
3268                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3269                 if (length == ~(uint64_t)0)
3270                         fl->fl_end = OFFSET_MAX;
3271                 fl->fl_type = F_WRLCK;
3272                 if (type & 1)
3273                         fl->fl_type = F_RDLCK;
3274                 fl->fl_pid = 0;
3275         }
3276         READ64(clientid);
3277         READ32(namelen);
3278         READ_BUF(namelen);
3279         return -NFS4ERR_DENIED;
3280 }
3281
3282 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3283 {
3284         __be32 *p;
3285         int status;
3286
3287         status = decode_op_hdr(xdr, OP_LOCK);
3288         if (status == 0) {
3289                 READ_BUF(NFS4_STATEID_SIZE);
3290                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3291         } else if (status == -NFS4ERR_DENIED)
3292                 return decode_lock_denied(xdr, NULL);
3293         return status;
3294 }
3295
3296 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3297 {
3298         int status;
3299         status = decode_op_hdr(xdr, OP_LOCKT);
3300         if (status == -NFS4ERR_DENIED)
3301                 return decode_lock_denied(xdr, res->denied);
3302         return status;
3303 }
3304
3305 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3306 {
3307         __be32 *p;
3308         int status;
3309
3310         status = decode_op_hdr(xdr, OP_LOCKU);
3311         if (status == 0) {
3312                 READ_BUF(NFS4_STATEID_SIZE);
3313                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3314         }
3315         return status;
3316 }
3317
3318 static int decode_lookup(struct xdr_stream *xdr)
3319 {
3320         return decode_op_hdr(xdr, OP_LOOKUP);
3321 }
3322
3323 /* This is too sick! */
3324 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3325 {
3326         __be32 *p;
3327         uint32_t limit_type, nblocks, blocksize;
3328
3329         READ_BUF(12);
3330         READ32(limit_type);
3331         switch (limit_type) {
3332                 case 1:
3333                         READ64(*maxsize);
3334                         break;
3335                 case 2:
3336                         READ32(nblocks);
3337                         READ32(blocksize);
3338                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3339         }
3340         return 0;
3341 }
3342
3343 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3344 {
3345         __be32 *p;
3346         uint32_t delegation_type;
3347
3348         READ_BUF(4);
3349         READ32(delegation_type);
3350         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3351                 res->delegation_type = 0;
3352                 return 0;
3353         }
3354         READ_BUF(NFS4_STATEID_SIZE+4);
3355         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3356         READ32(res->do_recall);
3357         switch (delegation_type) {
3358                 case NFS4_OPEN_DELEGATE_READ:
3359                         res->delegation_type = FMODE_READ;
3360                         break;
3361                 case NFS4_OPEN_DELEGATE_WRITE:
3362                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3363                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3364                                 return -EIO;
3365         }
3366         return decode_ace(xdr, NULL, res->server->nfs_client);
3367 }
3368
3369 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3370 {
3371         __be32 *p;
3372         uint32_t savewords, bmlen, i;
3373         int status;
3374
3375         status = decode_op_hdr(xdr, OP_OPEN);
3376         if (status)
3377                 return status;
3378         READ_BUF(NFS4_STATEID_SIZE);
3379         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3380
3381         decode_change_info(xdr, &res->cinfo);
3382
3383         READ_BUF(8);
3384         READ32(res->rflags);
3385         READ32(bmlen);
3386         if (bmlen > 10)
3387                 goto xdr_error;
3388
3389         READ_BUF(bmlen << 2);
3390         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3391         for (i = 0; i < savewords; ++i)
3392                 READ32(res->attrset[i]);
3393         for (; i < NFS4_BITMAP_SIZE; i++)
3394                 res->attrset[i] = 0;
3395
3396         return decode_delegation(xdr, res);
3397 xdr_error:
3398         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3399         return -EIO;
3400 }
3401
3402 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3403 {
3404         __be32 *p;
3405         int status;
3406
3407         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3408         if (status)
3409                 return status;
3410         READ_BUF(NFS4_STATEID_SIZE);
3411         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3412         return 0;
3413 }
3414
3415 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3416 {
3417         __be32 *p;
3418         int status;
3419
3420         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3421         if (status)
3422                 return status;
3423         READ_BUF(NFS4_STATEID_SIZE);
3424         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3425         return 0;
3426 }
3427
3428 static int decode_putfh(struct xdr_stream *xdr)
3429 {
3430         return decode_op_hdr(xdr, OP_PUTFH);
3431 }
3432
3433 static int decode_putrootfh(struct xdr_stream *xdr)
3434 {
3435         return decode_op_hdr(xdr, OP_PUTROOTFH);
3436 }
3437
3438 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3439 {
3440         struct kvec *iov = req->rq_rcv_buf.head;
3441         __be32 *p;
3442         uint32_t count, eof, recvd, hdrlen;
3443         int status;
3444
3445         status = decode_op_hdr(xdr, OP_READ);
3446         if (status)
3447                 return status;
3448         READ_BUF(8);
3449         READ32(eof);
3450         READ32(count);
3451         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3452         recvd = req->rq_rcv_buf.len - hdrlen;
3453         if (count > recvd) {
3454                 printk(KERN_WARNING "NFS: server cheating in read reply: "
3455                                 "count %u > recvd %u\n", count, recvd);
3456                 count = recvd;
3457                 eof = 0;
3458         }
3459         xdr_read_pages(xdr, count);
3460         res->eof = eof;
3461         res->count = count;
3462         return 0;
3463 }
3464
3465 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3466 {
3467         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3468         struct page     *page = *rcvbuf->pages;
3469         struct kvec     *iov = rcvbuf->head;
3470         unsigned int    nr, pglen = rcvbuf->page_len;
3471         __be32          *end, *entry, *p, *kaddr;
3472         uint32_t        len, attrlen, xlen;
3473         int             hdrlen, recvd, status;
3474
3475         status = decode_op_hdr(xdr, OP_READDIR);
3476         if (status)
3477                 return status;
3478         READ_BUF(8);
3479         COPYMEM(readdir->verifier.data, 8);
3480         dprintk("%s: verifier = 0x%x%x\n",
3481                         __FUNCTION__,
3482                         ((u32 *)readdir->verifier.data)[0],
3483                         ((u32 *)readdir->verifier.data)[1]);
3484
3485
3486         hdrlen = (char *) p - (char *) iov->iov_base;
3487         recvd = rcvbuf->len - hdrlen;
3488         if (pglen > recvd)
3489                 pglen = recvd;
3490         xdr_read_pages(xdr, pglen);
3491
3492         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3493         kaddr = p = kmap_atomic(page, KM_USER0);
3494         end = p + ((pglen + readdir->pgbase) >> 2);
3495         entry = p;
3496         for (nr = 0; *p++; nr++) {
3497                 if (end - p < 3)
3498                         goto short_pkt;
3499                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3500                 p += 2;                 /* cookie */
3501                 len = ntohl(*p++);      /* filename length */
3502                 if (len > NFS4_MAXNAMLEN) {
3503                         printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
3504                         goto err_unmap;
3505                 }
3506                 xlen = XDR_QUADLEN(len);
3507                 if (end - p < xlen + 1)
3508                         goto short_pkt;
3509                 dprintk("filename = %*s\n", len, (char *)p);
3510                 p += xlen;
3511                 len = ntohl(*p++);      /* bitmap length */
3512                 if (end - p < len + 1)
3513                         goto short_pkt;
3514                 p += len;
3515                 attrlen = XDR_QUADLEN(ntohl(*p++));
3516                 if (end - p < attrlen + 2)
3517                         goto short_pkt;
3518                 p += attrlen;           /* attributes */
3519                 entry = p;
3520         }
3521         if (!nr && (entry[0] != 0 || entry[1] == 0))
3522                 goto short_pkt;
3523 out:
3524         kunmap_atomic(kaddr, KM_USER0);
3525         return 0;
3526 short_pkt:
3527         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3528         entry[0] = entry[1] = 0;
3529         /* truncate listing ? */
3530         if (!nr) {
3531                 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
3532                 entry[1] = 1;
3533         }
3534         goto out;
3535 err_unmap:
3536         kunmap_atomic(kaddr, KM_USER0);
3537         return -errno_NFSERR_IO;
3538 }
3539
3540 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3541 {
3542         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3543         struct kvec *iov = rcvbuf->head;
3544         int hdrlen, len, recvd;
3545         __be32 *p;
3546         char *kaddr;
3547         int status;
3548
3549         status = decode_op_hdr(xdr, OP_READLINK);
3550         if (status)
3551                 return status;
3552
3553         /* Convert length of symlink */
3554         READ_BUF(4);
3555         READ32(len);
3556         if (len >= rcvbuf->page_len || len <= 0) {
3557                 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
3558                 return -ENAMETOOLONG;
3559         }
3560         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3561         recvd = req->rq_rcv_buf.len - hdrlen;
3562         if (recvd < len) {
3563                 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
3564                                 "count %u > recvd %u\n", len, recvd);
3565                 return -EIO;
3566         }
3567         xdr_read_pages(xdr, len);
3568         /*
3569          * The XDR encode routine has set things up so that
3570          * the link text will be copied directly into the
3571          * buffer.  We just have to do overflow-checking,
3572          * and and null-terminate the text (the VFS expects
3573          * null-termination).
3574          */
3575         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3576         kaddr[len+rcvbuf->page_base] = '\0';
3577         kunmap_atomic(kaddr, KM_USER0);
3578         return 0;
3579 }
3580
3581 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3582 {
3583         int status;
3584
3585         status = decode_op_hdr(xdr, OP_REMOVE);
3586         if (status)
3587                 goto out;
3588         status = decode_change_info(xdr, cinfo);
3589 out:
3590         return status;
3591 }
3592
3593 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3594               struct nfs4_change_info *new_cinfo)
3595 {
3596         int status;
3597
3598         status = decode_op_hdr(xdr, OP_RENAME);
3599         if (status)
3600                 goto out;
3601         if ((status = decode_change_info(xdr, old_cinfo)))
3602                 goto out;
3603         status = decode_change_info(xdr, new_cinfo);
3604 out:
3605         return status;
3606 }
3607
3608 static int decode_renew(struct xdr_stream *xdr)
3609 {
3610         return decode_op_hdr(xdr, OP_RENEW);
3611 }
3612
3613 static int
3614 decode_restorefh(struct xdr_stream *xdr)
3615 {
3616         return decode_op_hdr(xdr, OP_RESTOREFH);
3617 }
3618
3619 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3620                 size_t *acl_len)
3621 {
3622         __be32 *savep;
3623         uint32_t attrlen,
3624                  bitmap[2] = {0};
3625         struct kvec *iov = req->rq_rcv_buf.head;
3626         int status;
3627
3628         *acl_len = 0;
3629         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3630                 goto out;
3631         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3632                 goto out;
3633         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3634                 goto out;
3635
3636         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3637                 return -EIO;
3638         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3639                 int hdrlen, recvd;
3640
3641                 /* We ignore &savep and don't do consistency checks on
3642                  * the attr length.  Let userspace figure it out.... */
3643                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3644                 recvd = req->rq_rcv_buf.len - hdrlen;
3645                 if (attrlen > recvd) {
3646                         printk(KERN_WARNING "NFS: server cheating in getattr"
3647                                         " acl reply: attrlen %u > recvd %u\n",
3648                                         attrlen, recvd);
3649                         return -EINVAL;
3650                 }
3651                 xdr_read_pages(xdr, attrlen);
3652                 *acl_len = attrlen;
3653         } else
3654                 status = -EOPNOTSUPP;
3655
3656 out:
3657         return status;
3658 }
3659
3660 static int
3661 decode_savefh(struct xdr_stream *xdr)
3662 {
3663         return decode_op_hdr(xdr, OP_SAVEFH);
3664 }
3665
3666 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3667 {
3668         __be32 *p;
3669         uint32_t bmlen;
3670         int status;
3671
3672
3673         status = decode_op_hdr(xdr, OP_SETATTR);
3674         if (status)
3675                 return status;
3676         READ_BUF(4);
3677         READ32(bmlen);
3678         READ_BUF(bmlen << 2);
3679         return 0;
3680 }
3681
3682 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3683 {
3684         __be32 *p;
3685         uint32_t opnum;
3686         int32_t nfserr;
3687
3688         READ_BUF(8);
3689         READ32(opnum);
3690         if (opnum != OP_SETCLIENTID) {
3691                 printk(KERN_NOTICE
3692                                 "nfs4_decode_setclientid: Server returned operation"
3693                                 " %d\n", opnum);
3694                 return -EIO;
3695         }
3696         READ32(nfserr);
3697         if (nfserr == NFS_OK) {
3698                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3699                 READ64(clp->cl_clientid);
3700                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3701         } else if (nfserr == NFSERR_CLID_INUSE) {
3702                 uint32_t len;
3703
3704                 /* skip netid string */
3705                 READ_BUF(4);
3706                 READ32(len);
3707                 READ_BUF(len);
3708
3709                 /* skip uaddr string */
3710                 READ_BUF(4);
3711                 READ32(len);
3712                 READ_BUF(len);
3713                 return -NFSERR_CLID_INUSE;
3714         } else
3715                 return -nfs4_stat_to_errno(nfserr);
3716
3717         return 0;
3718 }
3719
3720 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3721 {
3722         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3723 }
3724
3725 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3726 {
3727         __be32 *p;
3728         int status;
3729
3730         status = decode_op_hdr(xdr, OP_WRITE);
3731         if (status)
3732                 return status;
3733
3734         READ_BUF(16);
3735         READ32(res->count);
3736         READ32(res->verf->committed);
3737         COPYMEM(res->verf->verifier, 8);
3738         return 0;
3739 }
3740
3741 static int decode_delegreturn(struct xdr_stream *xdr)
3742 {
3743         return decode_op_hdr(xdr, OP_DELEGRETURN);
3744 }
3745
3746 /*
3747  * Decode OPEN_DOWNGRADE response
3748  */
3749 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3750 {
3751         struct xdr_stream xdr;
3752         struct compound_hdr hdr;
3753         int status;
3754
3755         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3756         status = decode_compound_hdr(&xdr, &hdr);
3757         if (status)
3758                 goto out;
3759         status = decode_putfh(&xdr);
3760         if (status)
3761                 goto out;
3762         status = decode_open_downgrade(&xdr, res);
3763         if (status != 0)
3764                 goto out;
3765         decode_getfattr(&xdr, res->fattr, res->server);
3766 out:
3767         return status;
3768 }
3769
3770 /*
3771  * END OF "GENERIC" DECODE ROUTINES.
3772  */
3773
3774 /*
3775  * Decode ACCESS response
3776  */
3777 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3778 {
3779         struct xdr_stream xdr;
3780         struct compound_hdr hdr;
3781         int status;
3782
3783         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3784         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3785                 goto out;
3786         if ((status = decode_putfh(&xdr)) == 0)
3787                 status = decode_access(&xdr, res);
3788 out:
3789         return status;
3790 }
3791
3792 /*
3793  * Decode LOOKUP response
3794  */
3795 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3796 {
3797         struct xdr_stream xdr;
3798         struct compound_hdr hdr;
3799         int status;
3800
3801         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3802         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3803                 goto out;
3804         if ((status = decode_putfh(&xdr)) != 0)
3805                 goto out;
3806         if ((status = decode_lookup(&xdr)) != 0)
3807                 goto out;
3808         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3809                 goto out;
3810         status = decode_getfattr(&xdr, res->fattr, res->server);
3811 out:
3812         return status;
3813 }
3814
3815 /*
3816  * Decode LOOKUP_ROOT response
3817  */
3818 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3819 {
3820         struct xdr_stream xdr;
3821         struct compound_hdr hdr;
3822         int status;
3823
3824         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3825         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3826                 goto out;
3827         if ((status = decode_putrootfh(&xdr)) != 0)
3828                 goto out;
3829         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3830                 status = decode_getfattr(&xdr, res->fattr, res->server);
3831 out:
3832         return status;
3833 }
3834
3835 /*
3836  * Decode REMOVE response
3837  */
3838 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3839 {
3840         struct xdr_stream xdr;
3841         struct compound_hdr hdr;
3842         int status;
3843
3844         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3845         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3846                 goto out;
3847         if ((status = decode_putfh(&xdr)) != 0)
3848                 goto out;
3849         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3850                 goto out;
3851         decode_getfattr(&xdr, &res->dir_attr, res->server);
3852 out:
3853         return status;
3854 }
3855
3856 /*
3857  * Decode RENAME response
3858  */
3859 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3860 {
3861         struct xdr_stream xdr;
3862         struct compound_hdr hdr;
3863         int status;
3864
3865         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3866         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3867                 goto out;
3868         if ((status = decode_putfh(&xdr)) != 0)
3869                 goto out;
3870         if ((status = decode_savefh(&xdr)) != 0)
3871                 goto out;
3872         if ((status = decode_putfh(&xdr)) != 0)
3873                 goto out;
3874         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3875                 goto out;
3876         /* Current FH is target directory */
3877         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3878                 goto out;
3879         if ((status = decode_restorefh(&xdr)) != 0)
3880                 goto out;
3881         decode_getfattr(&xdr, res->old_fattr, res->server);
3882 out:
3883         return status;
3884 }
3885
3886 /*
3887  * Decode LINK response
3888  */
3889 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3890 {
3891         struct xdr_stream xdr;
3892         struct compound_hdr hdr;
3893         int status;
3894
3895         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3896         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3897                 goto out;
3898         if ((status = decode_putfh(&xdr)) != 0)
3899                 goto out;
3900         if ((status = decode_savefh(&xdr)) != 0)
3901                 goto out;
3902         if ((status = decode_putfh(&xdr)) != 0)
3903                 goto out;
3904         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3905                 goto out;
3906         /*
3907          * Note order: OP_LINK leaves the directory as the current
3908          *             filehandle.
3909          */
3910         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3911                 goto out;
3912         if ((status = decode_restorefh(&xdr)) != 0)
3913                 goto out;
3914         decode_getfattr(&xdr, res->fattr, res->server);
3915 out:
3916         return status;
3917 }
3918
3919 /*
3920  * Decode CREATE response
3921  */
3922 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3923 {
3924         struct xdr_stream xdr;
3925         struct compound_hdr hdr;
3926         int status;
3927
3928         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3929         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3930                 goto out;
3931         if ((status = decode_putfh(&xdr)) != 0)
3932                 goto out;
3933         if ((status = decode_savefh(&xdr)) != 0)
3934                 goto out;
3935         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3936                 goto out;
3937         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3938                 goto out;
3939         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3940                 goto out;
3941         if ((status = decode_restorefh(&xdr)) != 0)
3942                 goto out;
3943         decode_getfattr(&xdr, res->dir_fattr, res->server);
3944 out:
3945         return status;
3946 }
3947
3948 /*
3949  * Decode SYMLINK response
3950  */
3951 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3952 {
3953         return nfs4_xdr_dec_create(rqstp, p, res);
3954 }
3955
3956 /*
3957  * Decode GETATTR response
3958  */
3959 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3960 {
3961         struct xdr_stream xdr;
3962         struct compound_hdr hdr;
3963         int status;
3964
3965         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3966         status = decode_compound_hdr(&xdr, &hdr);
3967         if (status)
3968                 goto out;
3969         status = decode_putfh(&xdr);
3970         if (status)
3971                 goto out;
3972         status = decode_getfattr(&xdr, res->fattr, res->server);
3973 out:
3974         return status;
3975
3976 }
3977
3978 /*
3979  * Encode an SETACL request
3980  */
3981 static int
3982 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
3983 {
3984         struct xdr_stream xdr;
3985         struct compound_hdr hdr = {
3986                 .nops   = 2,
3987         };
3988         int status;
3989
3990         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
3991         encode_compound_hdr(&xdr, &hdr);
3992         status = encode_putfh(&xdr, args->fh);
3993         if (status)
3994                 goto out;
3995         status = encode_setacl(&xdr, args);
3996 out:
3997         return status;
3998 }
3999 /*
4000  * Decode SETACL response
4001  */
4002 static int
4003 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4004 {
4005         struct xdr_stream xdr;
4006         struct compound_hdr hdr;
4007         int status;
4008
4009         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4010         status = decode_compound_hdr(&xdr, &hdr);
4011         if (status)
4012                 goto out;
4013         status = decode_putfh(&xdr);
4014         if (status)
4015                 goto out;
4016         status = decode_setattr(&xdr, res);
4017 out:
4018         return status;
4019 }
4020
4021 /*
4022  * Decode GETACL response
4023  */
4024 static int
4025 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4026 {
4027         struct xdr_stream xdr;
4028         struct compound_hdr hdr;
4029         int status;
4030
4031         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4032         status = decode_compound_hdr(&xdr, &hdr);
4033         if (status)
4034                 goto out;
4035         status = decode_putfh(&xdr);
4036         if (status)
4037                 goto out;
4038         status = decode_getacl(&xdr, rqstp, acl_len);
4039
4040 out:
4041         return status;
4042 }
4043
4044 /*
4045  * Decode CLOSE response
4046  */
4047 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4048 {
4049         struct xdr_stream xdr;
4050         struct compound_hdr hdr;
4051         int status;
4052
4053         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4054         status = decode_compound_hdr(&xdr, &hdr);
4055         if (status)
4056                 goto out;
4057         status = decode_putfh(&xdr);
4058         if (status)
4059                 goto out;
4060         status = decode_close(&xdr, res);
4061         if (status != 0)
4062                 goto out;
4063         /*
4064          * Note: Server may do delete on close for this file
4065          *      in which case the getattr call will fail with
4066          *      an ESTALE error. Shouldn't be a problem,
4067          *      though, since fattr->valid will remain unset.
4068          */
4069         decode_getfattr(&xdr, res->fattr, res->server);
4070 out:
4071         return status;
4072 }
4073
4074 /*
4075  * Decode OPEN response
4076  */
4077 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4078 {
4079         struct xdr_stream xdr;
4080         struct compound_hdr hdr;
4081         int status;
4082
4083         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4084         status = decode_compound_hdr(&xdr, &hdr);
4085         if (status)
4086                 goto out;
4087         status = decode_putfh(&xdr);
4088         if (status)
4089                 goto out;
4090         status = decode_savefh(&xdr);
4091         if (status)
4092                 goto out;
4093         status = decode_open(&xdr, res);
4094         if (status)
4095                 goto out;
4096         if (decode_getfh(&xdr, &res->fh) != 0)
4097                 goto out;
4098         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4099                 goto out;
4100         if (decode_restorefh(&xdr) != 0)
4101                 goto out;
4102         decode_getfattr(&xdr, res->dir_attr, res->server);
4103 out:
4104         return status;
4105 }
4106
4107 /*
4108  * Decode OPEN_CONFIRM response
4109  */
4110 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4111 {
4112         struct xdr_stream xdr;
4113         struct compound_hdr hdr;
4114         int status;
4115
4116         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4117         status = decode_compound_hdr(&xdr, &hdr);
4118         if (status)
4119                 goto out;
4120         status = decode_putfh(&xdr);
4121         if (status)
4122                 goto out;
4123         status = decode_open_confirm(&xdr, res);
4124 out:
4125         return status;
4126 }
4127
4128 /*
4129  * Decode OPEN response
4130  */
4131 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4132 {
4133         struct xdr_stream xdr;
4134         struct compound_hdr hdr;
4135         int status;
4136
4137         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4138         status = decode_compound_hdr(&xdr, &hdr);
4139         if (status)
4140                 goto out;
4141         status = decode_putfh(&xdr);
4142         if (status)
4143                 goto out;
4144         status = decode_open(&xdr, res);
4145         if (status)
4146                 goto out;
4147         decode_getfattr(&xdr, res->f_attr, res->server);
4148 out:
4149         return status;
4150 }
4151
4152 /*
4153  * Decode SETATTR response
4154  */
4155 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4156 {
4157         struct xdr_stream xdr;
4158         struct compound_hdr hdr;
4159         int status;
4160
4161         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4162         status = decode_compound_hdr(&xdr, &hdr);
4163         if (status)
4164                 goto out;
4165         status = decode_putfh(&xdr);
4166         if (status)
4167                 goto out;
4168         status = decode_setattr(&xdr, res);
4169         if (status)
4170                 goto out;
4171         status = decode_getfattr(&xdr, res->fattr, res->server);
4172         if (status == NFS4ERR_DELAY)
4173                 status = 0;
4174 out:
4175         return status;
4176 }
4177
4178 /*
4179  * Decode LOCK response
4180  */
4181 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4182 {
4183         struct xdr_stream xdr;
4184         struct compound_hdr hdr;
4185         int status;
4186
4187         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4188         status = decode_compound_hdr(&xdr, &hdr);
4189         if (status)
4190                 goto out;
4191         status = decode_putfh(&xdr);
4192         if (status)
4193                 goto out;
4194         status = decode_lock(&xdr, res);
4195 out:
4196         return status;
4197 }
4198
4199 /*
4200  * Decode LOCKT response
4201  */
4202 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4203 {
4204         struct xdr_stream xdr;
4205         struct compound_hdr hdr;
4206         int status;
4207
4208         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4209         status = decode_compound_hdr(&xdr, &hdr);
4210         if (status)
4211                 goto out;
4212         status = decode_putfh(&xdr);
4213         if (status)
4214                 goto out;
4215         status = decode_lockt(&xdr, res);
4216 out:
4217         return status;
4218 }
4219
4220 /*
4221  * Decode LOCKU response
4222  */
4223 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4224 {
4225         struct xdr_stream xdr;
4226         struct compound_hdr hdr;
4227         int status;
4228
4229         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4230         status = decode_compound_hdr(&xdr, &hdr);
4231         if (status)
4232                 goto out;
4233         status = decode_putfh(&xdr);
4234         if (status)
4235                 goto out;
4236         status = decode_locku(&xdr, res);
4237 out:
4238         return status;
4239 }
4240
4241 /*
4242  * Decode READLINK response
4243  */
4244 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4245 {
4246         struct xdr_stream xdr;
4247         struct compound_hdr hdr;
4248         int status;
4249
4250         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4251         status = decode_compound_hdr(&xdr, &hdr);
4252         if (status)
4253                 goto out;
4254         status = decode_putfh(&xdr);
4255         if (status)
4256                 goto out;
4257         status = decode_readlink(&xdr, rqstp);
4258 out:
4259         return status;
4260 }
4261
4262 /*
4263  * Decode READDIR response
4264  */
4265 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4266 {
4267         struct xdr_stream xdr;
4268         struct compound_hdr hdr;
4269         int status;
4270
4271         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4272         status = decode_compound_hdr(&xdr, &hdr);
4273         if (status)
4274                 goto out;
4275         status = decode_putfh(&xdr);
4276         if (status)
4277                 goto out;
4278         status = decode_readdir(&xdr, rqstp, res);
4279 out:
4280         return status;
4281 }
4282
4283 /*
4284  * Decode Read response
4285  */
4286 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4287 {
4288         struct xdr_stream xdr;
4289         struct compound_hdr hdr;
4290         int status;
4291
4292         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4293         status = decode_compound_hdr(&xdr, &hdr);
4294         if (status)
4295                 goto out;
4296         status = decode_putfh(&xdr);
4297         if (status)
4298                 goto out;
4299         status = decode_read(&xdr, rqstp, res);
4300         if (!status)
4301                 status = res->count;
4302 out:
4303         return status;
4304 }
4305
4306 /*
4307  * Decode WRITE response
4308  */
4309 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4310 {
4311         struct xdr_stream xdr;
4312         struct compound_hdr hdr;
4313         int status;
4314
4315         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4316         status = decode_compound_hdr(&xdr, &hdr);
4317         if (status)
4318                 goto out;
4319         status = decode_putfh(&xdr);
4320         if (status)
4321                 goto out;
4322         status = decode_write(&xdr, res);
4323         if (status)
4324                 goto out;
4325         decode_getfattr(&xdr, res->fattr, res->server);
4326         if (!status)
4327                 status = res->count;
4328 out:
4329         return status;
4330 }
4331
4332 /*
4333  * Decode COMMIT response
4334  */
4335 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4336 {
4337         struct xdr_stream xdr;
4338         struct compound_hdr hdr;
4339         int status;
4340
4341         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4342         status = decode_compound_hdr(&xdr, &hdr);
4343         if (status)
4344                 goto out;
4345         status = decode_putfh(&xdr);
4346         if (status)
4347                 goto out;
4348         status = decode_commit(&xdr, res);
4349         if (status)
4350                 goto out;
4351         decode_getfattr(&xdr, res->fattr, res->server);
4352 out:
4353         return status;
4354 }
4355
4356 /*
4357  * FSINFO request
4358  */
4359 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4360 {
4361         struct xdr_stream xdr;
4362         struct compound_hdr hdr;
4363         int status;
4364
4365         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4366         status = decode_compound_hdr(&xdr, &hdr);
4367         if (!status)
4368                 status = decode_putfh(&xdr);
4369         if (!status)
4370                 status = decode_fsinfo(&xdr, fsinfo);
4371         if (!status)
4372                 status = -nfs4_stat_to_errno(hdr.status);
4373         return status;
4374 }
4375
4376 /*
4377  * PATHCONF request
4378  */
4379 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4380 {
4381         struct xdr_stream xdr;
4382         struct compound_hdr hdr;
4383         int status;
4384
4385         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4386         status = decode_compound_hdr(&xdr, &hdr);
4387         if (!status)
4388                 status = decode_putfh(&xdr);
4389         if (!status)
4390                 status = decode_pathconf(&xdr, pathconf);
4391         return status;
4392 }
4393
4394 /*
4395  * STATFS request
4396  */
4397 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4398 {
4399         struct xdr_stream xdr;
4400         struct compound_hdr hdr;
4401         int status;
4402
4403         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4404         status = decode_compound_hdr(&xdr, &hdr);
4405         if (!status)
4406                 status = decode_putfh(&xdr);
4407         if (!status)
4408                 status = decode_statfs(&xdr, fsstat);
4409         return status;
4410 }
4411
4412 /*
4413  * GETATTR_BITMAP request
4414  */
4415 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4416 {
4417         struct xdr_stream xdr;
4418         struct compound_hdr hdr;
4419         int status;
4420
4421         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4422         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4423                 goto out;
4424         if ((status = decode_putfh(&xdr)) != 0)
4425                 goto out;
4426         status = decode_server_caps(&xdr, res);
4427 out:
4428         return status;
4429 }
4430
4431 /*
4432  * Decode RENEW response
4433  */
4434 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4435 {
4436         struct xdr_stream xdr;
4437         struct compound_hdr hdr;
4438         int status;
4439
4440         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4441         status = decode_compound_hdr(&xdr, &hdr);
4442         if (!status)
4443                 status = decode_renew(&xdr);
4444         return status;
4445 }
4446
4447 /*
4448  * a SETCLIENTID request
4449  */
4450 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4451                 struct nfs_client *clp)
4452 {
4453         struct xdr_stream xdr;
4454         struct compound_hdr hdr;
4455         int status;
4456
4457         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4458         status = decode_compound_hdr(&xdr, &hdr);
4459         if (!status)
4460                 status = decode_setclientid(&xdr, clp);
4461         if (!status)
4462                 status = -nfs4_stat_to_errno(hdr.status);
4463         return status;
4464 }
4465
4466 /*
4467  * a SETCLIENTID_CONFIRM request
4468  */
4469 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4470 {
4471         struct xdr_stream xdr;
4472         struct compound_hdr hdr;
4473         int status;
4474
4475         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4476         status = decode_compound_hdr(&xdr, &hdr);
4477         if (!status)
4478                 status = decode_setclientid_confirm(&xdr);
4479         if (!status)
4480                 status = decode_putrootfh(&xdr);
4481         if (!status)
4482                 status = decode_fsinfo(&xdr, fsinfo);
4483         if (!status)
4484                 status = -nfs4_stat_to_errno(hdr.status);
4485         return status;
4486 }
4487
4488 /*
4489  * DELEGRETURN request
4490  */
4491 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4492 {
4493         struct xdr_stream xdr;
4494         struct compound_hdr hdr;
4495         int status;
4496
4497         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4498         status = decode_compound_hdr(&xdr, &hdr);
4499         if (status != 0)
4500                 goto out;
4501         status = decode_putfh(&xdr);
4502         if (status != 0)
4503                 goto out;
4504         status = decode_delegreturn(&xdr);
4505         decode_getfattr(&xdr, res->fattr, res->server);
4506 out:
4507         return status;
4508 }
4509
4510 /*
4511  * FS_LOCATIONS request
4512  */
4513 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4514 {
4515         struct xdr_stream xdr;
4516         struct compound_hdr hdr;
4517         int status;
4518
4519         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4520         status = decode_compound_hdr(&xdr, &hdr);
4521         if (status != 0)
4522                 goto out;
4523         if ((status = decode_putfh(&xdr)) != 0)
4524                 goto out;
4525         if ((status = decode_lookup(&xdr)) != 0)
4526                 goto out;
4527         xdr_enter_page(&xdr, PAGE_SIZE);
4528         status = decode_getfattr(&xdr, &res->fattr, res->server);
4529 out:
4530         return status;
4531 }
4532
4533 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4534 {
4535         uint32_t bitmap[2] = {0};
4536         uint32_t len;
4537
4538         if (!*p++) {
4539                 if (!*p)
4540                         return ERR_PTR(-EAGAIN);
4541                 entry->eof = 1;
4542                 return ERR_PTR(-EBADCOOKIE);
4543         }
4544
4545         entry->prev_cookie = entry->cookie;
4546         p = xdr_decode_hyper(p, &entry->cookie);
4547         entry->len = ntohl(*p++);
4548         entry->name = (const char *) p;
4549         p += XDR_QUADLEN(entry->len);
4550
4551         /*
4552          * In case the server doesn't return an inode number,
4553          * we fake one here.  (We don't use inode number 0,
4554          * since glibc seems to choke on it...)
4555          */
4556         entry->ino = 1;
4557
4558         len = ntohl(*p++);              /* bitmap length */
4559         if (len-- > 0) {
4560                 bitmap[0] = ntohl(*p++);
4561                 if (len-- > 0) {
4562                         bitmap[1] = ntohl(*p++);
4563                         p += len;
4564                 }
4565         }
4566         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4567         if (len > 0) {
4568                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4569                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4570                         /* Ignore the return value of rdattr_error for now */
4571                         p++;
4572                         len--;
4573                 }
4574                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4575                         xdr_decode_hyper(p, &entry->ino);
4576                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4577                         xdr_decode_hyper(p, &entry->ino);
4578                 p += len;
4579         }
4580
4581         entry->eof = !p[0] && p[1];
4582         return p;
4583 }
4584
4585 /*
4586  * We need to translate between nfs status return values and
4587  * the local errno values which may not be the same.
4588  */
4589 static struct {
4590         int stat;
4591         int errno;
4592 } nfs_errtbl[] = {
4593         { NFS4_OK,              0               },
4594         { NFS4ERR_PERM,         EPERM           },
4595         { NFS4ERR_NOENT,        ENOENT          },
4596         { NFS4ERR_IO,           errno_NFSERR_IO },
4597         { NFS4ERR_NXIO,         ENXIO           },
4598         { NFS4ERR_ACCESS,       EACCES          },
4599         { NFS4ERR_EXIST,        EEXIST          },
4600         { NFS4ERR_XDEV,         EXDEV           },
4601         { NFS4ERR_NOTDIR,       ENOTDIR         },
4602         { NFS4ERR_ISDIR,        EISDIR          },
4603         { NFS4ERR_INVAL,        EINVAL          },
4604         { NFS4ERR_FBIG,         EFBIG           },
4605         { NFS4ERR_NOSPC,        ENOSPC          },
4606         { NFS4ERR_ROFS,         EROFS           },
4607         { NFS4ERR_MLINK,        EMLINK          },
4608         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4609         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4610         { NFS4ERR_DQUOT,        EDQUOT          },
4611         { NFS4ERR_STALE,        ESTALE          },
4612         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4613         { NFS4ERR_BADOWNER,     EINVAL          },
4614         { NFS4ERR_BADNAME,      EINVAL          },
4615         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4616         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4617         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4618         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4619         { NFS4ERR_BADTYPE,      EBADTYPE        },
4620         { NFS4ERR_LOCKED,       EAGAIN          },
4621         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4622         { NFS4ERR_SYMLINK,      ELOOP           },
4623         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4624         { NFS4ERR_DEADLOCK,     EDEADLK         },
4625         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4626                                                     * to be handled by a
4627                                                     * middle-layer.
4628                                                     */
4629         { -1,                   EIO             }
4630 };
4631
4632 /*
4633  * Convert an NFS error code to a local one.
4634  * This one is used jointly by NFSv2 and NFSv3.
4635  */
4636 static int
4637 nfs4_stat_to_errno(int stat)
4638 {
4639         int i;
4640         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4641                 if (nfs_errtbl[i].stat == stat)
4642                         return nfs_errtbl[i].errno;
4643         }
4644         if (stat <= 10000 || stat > 10100) {
4645                 /* The server is looney tunes. */
4646                 return ESERVERFAULT;
4647         }
4648         /* If we cannot translate the error, the recovery routines should
4649          * handle it.
4650          * Note: remaining NFSv4 error codes have values > 10000, so should
4651          * not conflict with native Linux error codes.
4652          */
4653         return stat;
4654 }
4655
4656 #define PROC(proc, argtype, restype)                            \
4657 [NFSPROC4_CLNT_##proc] = {                                      \
4658         .p_proc   = NFSPROC4_COMPOUND,                          \
4659         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4660         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4661         .p_arglen = NFS4_##argtype##_sz,                        \
4662         .p_replen = NFS4_##restype##_sz,                        \
4663         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4664         .p_name   = #proc,                                      \
4665     }
4666
4667 struct rpc_procinfo     nfs4_procedures[] = {
4668   PROC(READ,            enc_read,       dec_read),
4669   PROC(WRITE,           enc_write,      dec_write),
4670   PROC(COMMIT,          enc_commit,     dec_commit),
4671   PROC(OPEN,            enc_open,       dec_open),
4672   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4673   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4674   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4675   PROC(CLOSE,           enc_close,      dec_close),
4676   PROC(SETATTR,         enc_setattr,    dec_setattr),
4677   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4678   PROC(RENEW,           enc_renew,      dec_renew),
4679   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4680   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4681   PROC(LOCK,            enc_lock,       dec_lock),
4682   PROC(LOCKT,           enc_lockt,      dec_lockt),
4683   PROC(LOCKU,           enc_locku,      dec_locku),
4684   PROC(ACCESS,          enc_access,     dec_access),
4685   PROC(GETATTR,         enc_getattr,    dec_getattr),
4686   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4687   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4688   PROC(REMOVE,          enc_remove,     dec_remove),
4689   PROC(RENAME,          enc_rename,     dec_rename),
4690   PROC(LINK,            enc_link,       dec_link),
4691   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4692   PROC(CREATE,          enc_create,     dec_create),
4693   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4694   PROC(STATFS,          enc_statfs,     dec_statfs),
4695   PROC(READLINK,        enc_readlink,   dec_readlink),
4696   PROC(READDIR,         enc_readdir,    dec_readdir),
4697   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4698   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4699   PROC(GETACL,          enc_getacl,     dec_getacl),
4700   PROC(SETACL,          enc_setacl,     dec_setacl),
4701   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4702 };
4703
4704 struct rpc_version              nfs_version4 = {
4705         .number                 = 4,
4706         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4707         .procs                  = nfs4_procedures
4708 };
4709
4710 /*
4711  * Local variables:
4712  *  c-basic-offset: 8
4713  * End:
4714  */