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                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 196                                 2 * nfs4_name_maxsz)
 197 #define decode_rename_maxsz     (op_decode_hdr_maxsz + 5 + 5)
 198 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 199                                 nfs4_name_maxsz)
 200 #define decode_link_maxsz       (op_decode_hdr_maxsz + 5)
 201 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 202                                  7 + \
 203                                  1 + encode_stateid_maxsz + 8)
 204 #define decode_lock_denied_maxsz \
 205                                 (8 + decode_lockowner_maxsz)
 206 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 207                                  decode_lock_denied_maxsz)
 208 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 209 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 212                                  encode_stateid_maxsz + \
 213                                  4)
 214 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_stateid_maxsz)
 216 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 217 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 218 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 219                                 1 + nfs4_name_maxsz + \
 220                                 1 + \
 221                                 nfs4_fattr_maxsz)
 222 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 223 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 224                                 1 + 2 + nfs4_name_maxsz + \
 225                                 encode_attrs_maxsz)
 226 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 227                                 decode_change_info_maxsz + \
 228                                 nfs4_fattr_bitmap_maxsz)
 229 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 230 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 231 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 232 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 233 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 234 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 235                                  nfs4_fattr_bitmap_maxsz + 1)
 236 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 237                                  encode_stateid_maxsz + 3)
 238 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 239 #define encode_fs_locations_maxsz \
 240                                 (encode_getattr_maxsz)
 241 #define decode_fs_locations_maxsz \
 242                                 (0)
 243 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 244 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 245 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 246                                 encode_putfh_maxsz + \
 247                                 encode_read_maxsz)
 248 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 249                                 decode_putfh_maxsz + \
 250                                 decode_read_maxsz)
 251 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 252                                 encode_putfh_maxsz + \
 253                                 encode_readlink_maxsz)
 254 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 255                                 decode_putfh_maxsz + \
 256                                 decode_readlink_maxsz)
 257 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 258                                 encode_putfh_maxsz + \
 259                                 encode_readdir_maxsz)
 260 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 261                                 decode_putfh_maxsz + \
 262                                 decode_readdir_maxsz)
 263 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 264                                 encode_putfh_maxsz + \
 265                                 encode_write_maxsz + \
 266                                 encode_getattr_maxsz)
 267 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 268                                 decode_putfh_maxsz + \
 269                                 decode_write_maxsz + \
 270                                 decode_getattr_maxsz)
 271 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 272                                 encode_putfh_maxsz + \
 273                                 encode_commit_maxsz + \
 274                                 encode_getattr_maxsz)
 275 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 276                                 decode_putfh_maxsz + \
 277                                 decode_commit_maxsz + \
 278                                 decode_getattr_maxsz)
 279 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_putfh_maxsz + \
 281                                 encode_savefh_maxsz + \
 282                                 encode_open_maxsz + \
 283                                 encode_getfh_maxsz + \
 284                                 encode_getattr_maxsz + \
 285                                 encode_restorefh_maxsz + \
 286                                 encode_getattr_maxsz)
 287 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 288                                 decode_putfh_maxsz + \
 289                                 decode_savefh_maxsz + \
 290                                 decode_open_maxsz + \
 291                                 decode_getfh_maxsz + \
 292                                 decode_getattr_maxsz + \
 293                                 decode_restorefh_maxsz + \
 294                                 decode_getattr_maxsz)
 295 #define NFS4_enc_open_confirm_sz \
 296                                 (compound_encode_hdr_maxsz + \
 297                                  encode_putfh_maxsz + \
 298                                  encode_open_confirm_maxsz)
 299 #define NFS4_dec_open_confirm_sz \
 300                                 (compound_decode_hdr_maxsz + \
 301                                  decode_putfh_maxsz + \
 302                                  decode_open_confirm_maxsz)
 303 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 304                                         encode_putfh_maxsz + \
 305                                         encode_open_maxsz + \
 306                                         encode_getattr_maxsz)
 307 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 308                                         decode_putfh_maxsz + \
 309                                         decode_open_maxsz + \
 310                                         decode_getattr_maxsz)
 311 #define NFS4_enc_open_downgrade_sz \
 312                                 (compound_encode_hdr_maxsz + \
 313                                  encode_putfh_maxsz + \
 314                                  encode_open_downgrade_maxsz + \
 315                                  encode_getattr_maxsz)
 316 #define NFS4_dec_open_downgrade_sz \
 317                                 (compound_decode_hdr_maxsz + \
 318                                  decode_putfh_maxsz + \
 319                                  decode_open_downgrade_maxsz + \
 320                                  decode_getattr_maxsz)
 321 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 322                                  encode_putfh_maxsz + \
 323                                  encode_close_maxsz + \
 324                                  encode_getattr_maxsz)
 325 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 326                                  decode_putfh_maxsz + \
 327                                  decode_close_maxsz + \
 328                                  decode_getattr_maxsz)
 329 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 330                                  encode_putfh_maxsz + \
 331                                  encode_setattr_maxsz + \
 332                                  encode_getattr_maxsz)
 333 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 334                                  decode_putfh_maxsz + \
 335                                  decode_setattr_maxsz + \
 336                                  decode_getattr_maxsz)
 337 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_fsinfo_maxsz)
 340 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_fsinfo_maxsz)
 343 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 344                                 encode_renew_maxsz)
 345 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 346                                 decode_renew_maxsz)
 347 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 348                                 encode_setclientid_maxsz)
 349 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 350                                 decode_setclientid_maxsz)
 351 #define NFS4_enc_setclientid_confirm_sz \
 352                                 (compound_encode_hdr_maxsz + \
 353                                 encode_setclientid_confirm_maxsz + \
 354                                 encode_putrootfh_maxsz + \
 355                                 encode_fsinfo_maxsz)
 356 #define NFS4_dec_setclientid_confirm_sz \
 357                                 (compound_decode_hdr_maxsz + \
 358                                 decode_setclientid_confirm_maxsz + \
 359                                 decode_putrootfh_maxsz + \
 360                                 decode_fsinfo_maxsz)
 361 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 362                                 encode_putfh_maxsz + \
 363                                 encode_lock_maxsz)
 364 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_lock_maxsz)
 367 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 368                                 encode_putfh_maxsz + \
 369                                 encode_lockt_maxsz)
 370 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 371                                  decode_putfh_maxsz + \
 372                                  decode_lockt_maxsz)
 373 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_putfh_maxsz + \
 375                                 encode_locku_maxsz)
 376 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_locku_maxsz)
 379 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_access_maxsz + \
 382                                 encode_getattr_maxsz)
 383 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 384                                 decode_putfh_maxsz + \
 385                                 decode_access_maxsz + \
 386                                 decode_getattr_maxsz)
 387 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 388                                 encode_putfh_maxsz + \
 389                                 encode_getattr_maxsz)
 390 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 391                                 decode_putfh_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 394                                 encode_putfh_maxsz + \
 395                                 encode_lookup_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_getfh_maxsz)
 398 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 399                                 decode_putfh_maxsz + \
 400                                 decode_lookup_maxsz + \
 401                                 decode_getattr_maxsz + \
 402                                 decode_getfh_maxsz)
 403 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 404                                 encode_putrootfh_maxsz + \
 405                                 encode_getattr_maxsz + \
 406                                 encode_getfh_maxsz)
 407 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 408                                 decode_putrootfh_maxsz + \
 409                                 decode_getattr_maxsz + \
 410                                 decode_getfh_maxsz)
 411 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 412                                 encode_putfh_maxsz + \
 413                                 encode_remove_maxsz + \
 414                                 encode_getattr_maxsz)
 415 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 416                                 decode_putfh_maxsz + \
 417                                 op_decode_hdr_maxsz + 5 + \
 418                                 decode_getattr_maxsz)
 419 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 420                                 encode_putfh_maxsz + \
 421                                 encode_savefh_maxsz + \
 422                                 encode_putfh_maxsz + \
 423                                 encode_rename_maxsz + \
 424                                 encode_getattr_maxsz + \
 425                                 encode_restorefh_maxsz + \
 426                                 encode_getattr_maxsz)
 427 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_savefh_maxsz + \
 430                                 decode_putfh_maxsz + \
 431                                 decode_rename_maxsz + \
 432                                 decode_getattr_maxsz + \
 433                                 decode_restorefh_maxsz + \
 434                                 decode_getattr_maxsz)
 435 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 436                                 encode_putfh_maxsz + \
 437                                 encode_savefh_maxsz + \
 438                                 encode_putfh_maxsz + \
 439                                 encode_link_maxsz + \
 440                                 decode_getattr_maxsz + \
 441                                 encode_restorefh_maxsz + \
 442                                 decode_getattr_maxsz)
 443 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 444                                 decode_putfh_maxsz + \
 445                                 decode_savefh_maxsz + \
 446                                 decode_putfh_maxsz + \
 447                                 decode_link_maxsz + \
 448                                 decode_getattr_maxsz + \
 449                                 decode_restorefh_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_putfh_maxsz + \
 453                                 encode_symlink_maxsz + \
 454                                 encode_getattr_maxsz + \
 455                                 encode_getfh_maxsz)
 456 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_symlink_maxsz + \
 459                                 decode_getattr_maxsz + \
 460                                 decode_getfh_maxsz)
 461 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_putfh_maxsz + \
 463                                 encode_savefh_maxsz + \
 464                                 encode_create_maxsz + \
 465                                 encode_getfh_maxsz + \
 466                                 encode_getattr_maxsz + \
 467                                 encode_restorefh_maxsz + \
 468                                 encode_getattr_maxsz)
 469 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_savefh_maxsz + \
 472                                 decode_create_maxsz + \
 473                                 decode_getfh_maxsz + \
 474                                 decode_getattr_maxsz + \
 475                                 decode_restorefh_maxsz + \
 476                                 decode_getattr_maxsz)
 477 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 478                                 encode_putfh_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 481                                 decode_putfh_maxsz + \
 482                                 decode_getattr_maxsz)
 483 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_statfs_maxsz)
 486 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_statfs_maxsz)
 489 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_getattr_maxsz)
 492 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_getattr_maxsz)
 495 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 496                                 encode_putfh_maxsz + \
 497                                 encode_delegreturn_maxsz + \
 498                                 encode_getattr_maxsz)
 499 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 500                                 decode_delegreturn_maxsz + \
 501                                 decode_getattr_maxsz)
 502 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_putfh_maxsz + \
 504                                 encode_getacl_maxsz)
 505 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_getacl_maxsz)
 508 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 509                                 encode_putfh_maxsz + \
 510                                 encode_setacl_maxsz)
 511 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 512                                 decode_putfh_maxsz + \
 513                                 decode_setacl_maxsz)
 514 #define NFS4_enc_fs_locations_sz \
 515                                 (compound_encode_hdr_maxsz + \
 516                                  encode_putfh_maxsz + \
 517                                  encode_lookup_maxsz + \
 518                                  encode_fs_locations_maxsz)
 519 #define NFS4_dec_fs_locations_sz \
 520                                 (compound_decode_hdr_maxsz + \
 521                                  decode_putfh_maxsz + \
 522                                  decode_lookup_maxsz + \
 523                                  decode_fs_locations_maxsz)
 524
 525 static struct {
 526         unsigned int    mode;
 527         unsigned int    nfs2type;
 528 } nfs_type2fmt[] = {
 529         { 0,            NFNON        },
 530         { S_IFREG,      NFREG        },
 531         { S_IFDIR,      NFDIR        },
 532         { S_IFBLK,      NFBLK        },
 533         { S_IFCHR,      NFCHR        },
 534         { S_IFLNK,      NFLNK        },
 535         { S_IFSOCK,     NFSOCK       },
 536         { S_IFIFO,      NFFIFO       },
 537         { 0,            NFNON        },
 538         { 0,            NFNON        },
 539 };
 540
 541 struct compound_hdr {
 542         int32_t         status;
 543         uint32_t        nops;
 544         uint32_t        taglen;
 545         char *          tag;
 546 };
 547
 548 /*
 549  * START OF "GENERIC" ENCODE ROUTINES.
 550  *   These may look a little ugly since they are imported from a "generic"
 551  * set of XDR encode/decode routines which are intended to be shared by
 552  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 553  *
 554  * If the pain of reading these is too great, it should be a straightforward
 555  * task to translate them into Linux-specific versions which are more
 556  * consistent with the style used in NFSv2/v3...
 557  */
 558 #define WRITE32(n)               *p++ = htonl(n)
 559 #define WRITE64(n)               do {                           \
 560         *p++ = htonl((uint32_t)((n) >> 32));                            \
 561         *p++ = htonl((uint32_t)(n));                                    \
 562 } while (0)
 563 #define WRITEMEM(ptr,nbytes)     do {                           \
 564         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 565 } while (0)
 566
 567 #define RESERVE_SPACE(nbytes)   do {                            \
 568         p = xdr_reserve_space(xdr, nbytes);                     \
 569         BUG_ON(!p);                                             \
 570 } while (0)
 571
 572 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 573 {
 574         __be32 *p;
 575
 576         p = xdr_reserve_space(xdr, 4 + len);
 577         BUG_ON(p == NULL);
 578         xdr_encode_opaque(p, str, len);
 579 }
 580
 581 static int encode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 582 {
 583         __be32 *p;
 584
 585         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 586         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 587         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 588         WRITE32(hdr->taglen);
 589         WRITEMEM(hdr->tag, hdr->taglen);
 590         WRITE32(NFS4_MINOR_VERSION);
 591         WRITE32(hdr->nops);
 592         return 0;
 593 }
 594
 595 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 596 {
 597         __be32 *p;
 598
 599         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 600         BUG_ON(p == NULL);
 601         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 602 }
 603
 604 static int encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 605 {
 606         char owner_name[IDMAP_NAMESZ];
 607         char owner_group[IDMAP_NAMESZ];
 608         int owner_namelen = 0;
 609         int owner_grouplen = 0;
 610         __be32 *p;
 611         __be32 *q;
 612         int len;
 613         uint32_t bmval0 = 0;
 614         uint32_t bmval1 = 0;
 615         int status;
 616
 617         /*
 618          * We reserve enough space to write the entire attribute buffer at once.
 619          * In the worst-case, this would be
 620          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 621          *          = 36 bytes, plus any contribution from variable-length fields
 622          *            such as owner/group.
 623          */
 624         len = 16;
 625
 626         /* Sigh */
 627         if (iap->ia_valid & ATTR_SIZE)
 628                 len += 8;
 629         if (iap->ia_valid & ATTR_MODE)
 630                 len += 4;
 631         if (iap->ia_valid & ATTR_UID) {
 632                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 633                 if (owner_namelen < 0) {
 634                         dprintk("nfs: couldn't resolve uid %d to string\n",
 635                                         iap->ia_uid);
 636                         /* XXX */
 637                         strcpy(owner_name, "nobody");
 638                         owner_namelen = sizeof("nobody") - 1;
 639                         /* goto out; */
 640                 }
 641                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 642         }
 643         if (iap->ia_valid & ATTR_GID) {
 644                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 645                 if (owner_grouplen < 0) {
 646                         dprintk("nfs: couldn't resolve gid %d to string\n",
 647                                         iap->ia_gid);
 648                         strcpy(owner_group, "nobody");
 649                         owner_grouplen = sizeof("nobody") - 1;
 650                         /* goto out; */
 651                 }
 652                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 653         }
 654         if (iap->ia_valid & ATTR_ATIME_SET)
 655                 len += 16;
 656         else if (iap->ia_valid & ATTR_ATIME)
 657                 len += 4;
 658         if (iap->ia_valid & ATTR_MTIME_SET)
 659                 len += 16;
 660         else if (iap->ia_valid & ATTR_MTIME)
 661                 len += 4;
 662         RESERVE_SPACE(len);
 663
 664         /*
 665          * We write the bitmap length now, but leave the bitmap and the attribute
 666          * buffer length to be backfilled at the end of this routine.
 667          */
 668         WRITE32(2);
 669         q = p;
 670         p += 3;
 671
 672         if (iap->ia_valid & ATTR_SIZE) {
 673                 bmval0 |= FATTR4_WORD0_SIZE;
 674                 WRITE64(iap->ia_size);
 675         }
 676         if (iap->ia_valid & ATTR_MODE) {
 677                 bmval1 |= FATTR4_WORD1_MODE;
 678                 WRITE32(iap->ia_mode & S_IALLUGO);
 679         }
 680         if (iap->ia_valid & ATTR_UID) {
 681                 bmval1 |= FATTR4_WORD1_OWNER;
 682                 WRITE32(owner_namelen);
 683                 WRITEMEM(owner_name, owner_namelen);
 684         }
 685         if (iap->ia_valid & ATTR_GID) {
 686                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 687                 WRITE32(owner_grouplen);
 688                 WRITEMEM(owner_group, owner_grouplen);
 689         }
 690         if (iap->ia_valid & ATTR_ATIME_SET) {
 691                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 692                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 693                 WRITE32(0);
 694                 WRITE32(iap->ia_mtime.tv_sec);
 695                 WRITE32(iap->ia_mtime.tv_nsec);
 696         }
 697         else if (iap->ia_valid & ATTR_ATIME) {
 698                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 699                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 700         }
 701         if (iap->ia_valid & ATTR_MTIME_SET) {
 702                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 703                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 704                 WRITE32(0);
 705                 WRITE32(iap->ia_mtime.tv_sec);
 706                 WRITE32(iap->ia_mtime.tv_nsec);
 707         }
 708         else if (iap->ia_valid & ATTR_MTIME) {
 709                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 710                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 711         }
 712
 713         /*
 714          * Now we backfill the bitmap and the attribute buffer length.
 715          */
 716         if (len != ((char *)p - (char *)q) + 4) {
 717                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 718                                 len, ((char *)p - (char *)q) + 4);
 719                 BUG();
 720         }
 721         len = (char *)p - (char *)q - 12;
 722         *q++ = htonl(bmval0);
 723         *q++ = htonl(bmval1);
 724         *q++ = htonl(len);
 725
 726         status = 0;
 727 /* out: */
 728         return status;
 729 }
 730
 731 static int encode_access(struct xdr_stream *xdr, u32 access)
 732 {
 733         __be32 *p;
 734
 735         RESERVE_SPACE(8);
 736         WRITE32(OP_ACCESS);
 737         WRITE32(access);
 738
 739         return 0;
 740 }
 741
 742 static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
 743 {
 744         __be32 *p;
 745
 746         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 747         WRITE32(OP_CLOSE);
 748         WRITE32(arg->seqid->sequence->counter);
 749         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 750
 751         return 0;
 752 }
 753
 754 static int encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args)
 755 {
 756         __be32 *p;
 757
 758         RESERVE_SPACE(16);
 759         WRITE32(OP_COMMIT);
 760         WRITE64(args->offset);
 761         WRITE32(args->count);
 762
 763         return 0;
 764 }
 765
 766 static int encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create)
 767 {
 768         __be32 *p;
 769
 770         RESERVE_SPACE(8);
 771         WRITE32(OP_CREATE);
 772         WRITE32(create->ftype);
 773
 774         switch (create->ftype) {
 775         case NF4LNK:
 776                 RESERVE_SPACE(4);
 777                 WRITE32(create->u.symlink.len);
 778                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 779                 break;
 780
 781         case NF4BLK: case NF4CHR:
 782                 RESERVE_SPACE(8);
 783                 WRITE32(create->u.device.specdata1);
 784                 WRITE32(create->u.device.specdata2);
 785                 break;
 786
 787         default:
 788                 break;
 789         }
 790
 791         RESERVE_SPACE(4 + create->name->len);
 792         WRITE32(create->name->len);
 793         WRITEMEM(create->name->name, create->name->len);
 794
 795         return encode_attrs(xdr, create->attrs, create->server);
 796 }
 797
 798 static int encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap)
 799 {
 800         __be32 *p;
 801
 802         RESERVE_SPACE(12);
 803         WRITE32(OP_GETATTR);
 804         WRITE32(1);
 805         WRITE32(bitmap);
 806         return 0;
 807 }
 808
 809 static int encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1)
 810 {
 811         __be32 *p;
 812
 813         RESERVE_SPACE(16);
 814         WRITE32(OP_GETATTR);
 815         WRITE32(2);
 816         WRITE32(bm0);
 817         WRITE32(bm1);
 818         return 0;
 819 }
 820
 821 static int encode_getfattr(struct xdr_stream *xdr, const u32* bitmask)
 822 {
 823         return encode_getattr_two(xdr,
 824                         bitmask[0] & nfs4_fattr_bitmap[0],
 825                         bitmask[1] & nfs4_fattr_bitmap[1]);
 826 }
 827
 828 static int encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask)
 829 {
 830         return encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 831                         bitmask[1] & nfs4_fsinfo_bitmap[1]);
 832 }
 833
 834 static int encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask)
 835 {
 836         return encode_getattr_two(xdr,
 837                                   bitmask[0] & nfs4_fs_locations_bitmap[0],
 838                                   bitmask[1] & nfs4_fs_locations_bitmap[1]);
 839 }
 840
 841 static int encode_getfh(struct xdr_stream *xdr)
 842 {
 843         __be32 *p;
 844
 845         RESERVE_SPACE(4);
 846         WRITE32(OP_GETFH);
 847
 848         return 0;
 849 }
 850
 851 static int encode_link(struct xdr_stream *xdr, const struct qstr *name)
 852 {
 853         __be32 *p;
 854
 855         RESERVE_SPACE(8 + name->len);
 856         WRITE32(OP_LINK);
 857         WRITE32(name->len);
 858         WRITEMEM(name->name, name->len);
 859
 860         return 0;
 861 }
 862
 863 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 864 {
 865         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 866                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 867         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 868 }
 869
 870 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 871 {
 872         if (fl->fl_end == OFFSET_MAX)
 873                 return ~(uint64_t)0;
 874         return fl->fl_end - fl->fl_start + 1;
 875 }
 876
 877 /*
 878  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 879  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 880  */
 881 static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 882 {
 883         __be32 *p;
 884
 885         RESERVE_SPACE(32);
 886         WRITE32(OP_LOCK);
 887         WRITE32(nfs4_lock_type(args->fl, args->block));
 888         WRITE32(args->reclaim);
 889         WRITE64(args->fl->fl_start);
 890         WRITE64(nfs4_lock_length(args->fl));
 891         WRITE32(args->new_lock_owner);
 892         if (args->new_lock_owner){
 893                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 894                 WRITE32(args->open_seqid->sequence->counter);
 895                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 896                 WRITE32(args->lock_seqid->sequence->counter);
 897                 WRITE64(args->lock_owner.clientid);
 898                 WRITE32(16);
 899                 WRITEMEM("lock id:", 8);
 900                 WRITE64(args->lock_owner.id);
 901         }
 902         else {
 903                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
 904                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
 905                 WRITE32(args->lock_seqid->sequence->counter);
 906         }
 907
 908         return 0;
 909 }
 910
 911 static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args)
 912 {
 913         __be32 *p;
 914
 915         RESERVE_SPACE(52);
 916         WRITE32(OP_LOCKT);
 917         WRITE32(nfs4_lock_type(args->fl, 0));
 918         WRITE64(args->fl->fl_start);
 919         WRITE64(nfs4_lock_length(args->fl));
 920         WRITE64(args->lock_owner.clientid);
 921         WRITE32(16);
 922         WRITEMEM("lock id:", 8);
 923         WRITE64(args->lock_owner.id);
 924
 925         return 0;
 926 }
 927
 928 static int encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args)
 929 {
 930         __be32 *p;
 931
 932         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
 933         WRITE32(OP_LOCKU);
 934         WRITE32(nfs4_lock_type(args->fl, 0));
 935         WRITE32(args->seqid->sequence->counter);
 936         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
 937         WRITE64(args->fl->fl_start);
 938         WRITE64(nfs4_lock_length(args->fl));
 939
 940         return 0;
 941 }
 942
 943 static int encode_lookup(struct xdr_stream *xdr, const struct qstr *name)
 944 {
 945         int len = name->len;
 946         __be32 *p;
 947
 948         RESERVE_SPACE(8 + len);
 949         WRITE32(OP_LOOKUP);
 950         WRITE32(len);
 951         WRITEMEM(name->name, len);
 952
 953         return 0;
 954 }
 955
 956 static void encode_share_access(struct xdr_stream *xdr, int open_flags)
 957 {
 958         __be32 *p;
 959
 960         RESERVE_SPACE(8);
 961         switch (open_flags & (FMODE_READ|FMODE_WRITE)) {
 962                 case FMODE_READ:
 963                         WRITE32(NFS4_SHARE_ACCESS_READ);
 964                         break;
 965                 case FMODE_WRITE:
 966                         WRITE32(NFS4_SHARE_ACCESS_WRITE);
 967                         break;
 968                 case FMODE_READ|FMODE_WRITE:
 969                         WRITE32(NFS4_SHARE_ACCESS_BOTH);
 970                         break;
 971                 default:
 972                         BUG();
 973         }
 974         WRITE32(0);             /* for linux, share_deny = 0 always */
 975 }
 976
 977 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 978 {
 979         __be32 *p;
 980  /*
 981  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 982  * owner 4 = 32
 983  */
 984         RESERVE_SPACE(8);
 985         WRITE32(OP_OPEN);
 986         WRITE32(arg->seqid->sequence->counter);
 987         encode_share_access(xdr, arg->open_flags);
 988         RESERVE_SPACE(28);
 989         WRITE64(arg->clientid);
 990         WRITE32(16);
 991         WRITEMEM("open id:", 8);
 992         WRITE64(arg->id);
 993 }
 994
 995 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
 996 {
 997         __be32 *p;
 998
 999         RESERVE_SPACE(4);
1000         switch(arg->open_flags & O_EXCL) {
1001                 case 0:
1002                         WRITE32(NFS4_CREATE_UNCHECKED);
1003                         encode_attrs(xdr, arg->u.attrs, arg->server);
1004                         break;
1005                 default:
1006                         WRITE32(NFS4_CREATE_EXCLUSIVE);
1007                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1008         }
1009 }
1010
1011 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1012 {
1013         __be32 *p;
1014
1015         RESERVE_SPACE(4);
1016         switch (arg->open_flags & O_CREAT) {
1017                 case 0:
1018                         WRITE32(NFS4_OPEN_NOCREATE);
1019                         break;
1020                 default:
1021                         BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1022                         WRITE32(NFS4_OPEN_CREATE);
1023                         encode_createmode(xdr, arg);
1024         }
1025 }
1026
1027 static inline void encode_delegation_type(struct xdr_stream *xdr, int delegation_type)
1028 {
1029         __be32 *p;
1030
1031         RESERVE_SPACE(4);
1032         switch (delegation_type) {
1033                 case 0:
1034                         WRITE32(NFS4_OPEN_DELEGATE_NONE);
1035                         break;
1036                 case FMODE_READ:
1037                         WRITE32(NFS4_OPEN_DELEGATE_READ);
1038                         break;
1039                 case FMODE_WRITE|FMODE_READ:
1040                         WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1041                         break;
1042                 default:
1043                         BUG();
1044         }
1045 }
1046
1047 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1048 {
1049         __be32 *p;
1050
1051         RESERVE_SPACE(4);
1052         WRITE32(NFS4_OPEN_CLAIM_NULL);
1053         encode_string(xdr, name->len, name->name);
1054 }
1055
1056 static inline void encode_claim_previous(struct xdr_stream *xdr, int type)
1057 {
1058         __be32 *p;
1059
1060         RESERVE_SPACE(4);
1061         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1062         encode_delegation_type(xdr, type);
1063 }
1064
1065 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1066 {
1067         __be32 *p;
1068
1069         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1070         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1071         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1072         encode_string(xdr, name->len, name->name);
1073 }
1074
1075 static int encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1076 {
1077         encode_openhdr(xdr, arg);
1078         encode_opentype(xdr, arg);
1079         switch (arg->claim) {
1080                 case NFS4_OPEN_CLAIM_NULL:
1081                         encode_claim_null(xdr, arg->name);
1082                         break;
1083                 case NFS4_OPEN_CLAIM_PREVIOUS:
1084                         encode_claim_previous(xdr, arg->u.delegation_type);
1085                         break;
1086                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1087                         encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1088                         break;
1089                 default:
1090                         BUG();
1091         }
1092         return 0;
1093 }
1094
1095 static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg)
1096 {
1097         __be32 *p;
1098
1099         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1100         WRITE32(OP_OPEN_CONFIRM);
1101         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1102         WRITE32(arg->seqid->sequence->counter);
1103
1104         return 0;
1105 }
1106
1107 static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg)
1108 {
1109         __be32 *p;
1110
1111         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1112         WRITE32(OP_OPEN_DOWNGRADE);
1113         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1114         WRITE32(arg->seqid->sequence->counter);
1115         encode_share_access(xdr, arg->open_flags);
1116         return 0;
1117 }
1118
1119 static int
1120 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh)
1121 {
1122         int len = fh->size;
1123         __be32 *p;
1124
1125         RESERVE_SPACE(8 + len);
1126         WRITE32(OP_PUTFH);
1127         WRITE32(len);
1128         WRITEMEM(fh->data, len);
1129
1130         return 0;
1131 }
1132
1133 static int encode_putrootfh(struct xdr_stream *xdr)
1134 {
1135         __be32 *p;
1136
1137         RESERVE_SPACE(4);
1138         WRITE32(OP_PUTROOTFH);
1139
1140         return 0;
1141 }
1142
1143 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1144 {
1145         nfs4_stateid stateid;
1146         __be32 *p;
1147
1148         RESERVE_SPACE(NFS4_STATEID_SIZE);
1149         if (ctx->state != NULL) {
1150                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1151                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1152         } else
1153                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1154 }
1155
1156 static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
1157 {
1158         __be32 *p;
1159
1160         RESERVE_SPACE(4);
1161         WRITE32(OP_READ);
1162
1163         encode_stateid(xdr, args->context);
1164
1165         RESERVE_SPACE(12);
1166         WRITE64(args->offset);
1167         WRITE32(args->count);
1168
1169         return 0;
1170 }
1171
1172 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
1173 {
1174         uint32_t attrs[2] = {
1175                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1176                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1177         };
1178         __be32 *p;
1179
1180         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1181         WRITE32(OP_READDIR);
1182         WRITE64(readdir->cookie);
1183         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1184         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1185         WRITE32(readdir->count);
1186         WRITE32(2);
1187         /* Switch to mounted_on_fileid if the server supports it */
1188         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1189                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1190         else
1191                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1192         WRITE32(attrs[0] & readdir->bitmask[0]);
1193         WRITE32(attrs[1] & readdir->bitmask[1]);
1194         dprintk("%s: cookie = %Lu, verifier = 0x%x%x, bitmap = 0x%x%x\n",
1195                         __FUNCTION__,
1196                         (unsigned long long)readdir->cookie,
1197                         ((u32 *)readdir->verifier.data)[0],
1198                         ((u32 *)readdir->verifier.data)[1],
1199                         attrs[0] & readdir->bitmask[0],
1200                         attrs[1] & readdir->bitmask[1]);
1201
1202         return 0;
1203 }
1204
1205 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
1206 {
1207         __be32 *p;
1208
1209         RESERVE_SPACE(4);
1210         WRITE32(OP_READLINK);
1211
1212         return 0;
1213 }
1214
1215 static int encode_remove(struct xdr_stream *xdr, const struct qstr *name)
1216 {
1217         __be32 *p;
1218
1219         RESERVE_SPACE(8 + name->len);
1220         WRITE32(OP_REMOVE);
1221         WRITE32(name->len);
1222         WRITEMEM(name->name, name->len);
1223
1224         return 0;
1225 }
1226
1227 static int encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname)
1228 {
1229         __be32 *p;
1230
1231         RESERVE_SPACE(8 + oldname->len);
1232         WRITE32(OP_RENAME);
1233         WRITE32(oldname->len);
1234         WRITEMEM(oldname->name, oldname->len);
1235
1236         RESERVE_SPACE(4 + newname->len);
1237         WRITE32(newname->len);
1238         WRITEMEM(newname->name, newname->len);
1239
1240         return 0;
1241 }
1242
1243 static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
1244 {
1245         __be32 *p;
1246
1247         RESERVE_SPACE(12);
1248         WRITE32(OP_RENEW);
1249         WRITE64(client_stateid->cl_clientid);
1250
1251         return 0;
1252 }
1253
1254 static int
1255 encode_restorefh(struct xdr_stream *xdr)
1256 {
1257         __be32 *p;
1258
1259         RESERVE_SPACE(4);
1260         WRITE32(OP_RESTOREFH);
1261
1262         return 0;
1263 }
1264
1265 static int
1266 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1271         WRITE32(OP_SETATTR);
1272         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1273         RESERVE_SPACE(2*4);
1274         WRITE32(1);
1275         WRITE32(FATTR4_WORD0_ACL);
1276         if (arg->acl_len % 4)
1277                 return -EINVAL;
1278         RESERVE_SPACE(4);
1279         WRITE32(arg->acl_len);
1280         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1281         return 0;
1282 }
1283
1284 static int
1285 encode_savefh(struct xdr_stream *xdr)
1286 {
1287         __be32 *p;
1288
1289         RESERVE_SPACE(4);
1290         WRITE32(OP_SAVEFH);
1291
1292         return 0;
1293 }
1294
1295 static int encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server)
1296 {
1297         int status;
1298         __be32 *p;
1299
1300         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1301         WRITE32(OP_SETATTR);
1302         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1303
1304         if ((status = encode_attrs(xdr, arg->iap, server)))
1305                 return status;
1306
1307         return 0;
1308 }
1309
1310 static int encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid)
1311 {
1312         __be32 *p;
1313
1314         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1315         WRITE32(OP_SETCLIENTID);
1316         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1317
1318         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1319         RESERVE_SPACE(4);
1320         WRITE32(setclientid->sc_prog);
1321         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1322         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1323         RESERVE_SPACE(4);
1324         WRITE32(setclientid->sc_cb_ident);
1325
1326         return 0;
1327 }
1328
1329 static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
1330 {
1331         __be32 *p;
1332
1333         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1334         WRITE32(OP_SETCLIENTID_CONFIRM);
1335         WRITE64(client_state->cl_clientid);
1336         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1337
1338         return 0;
1339 }
1340
1341 static int encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args)
1342 {
1343         __be32 *p;
1344
1345         RESERVE_SPACE(4);
1346         WRITE32(OP_WRITE);
1347
1348         encode_stateid(xdr, args->context);
1349
1350         RESERVE_SPACE(16);
1351         WRITE64(args->offset);
1352         WRITE32(args->stable);
1353         WRITE32(args->count);
1354
1355         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1356
1357         return 0;
1358 }
1359
1360 static int encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid)
1361 {
1362         __be32 *p;
1363
1364         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1365
1366         WRITE32(OP_DELEGRETURN);
1367         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1368         return 0;
1369
1370 }
1371 /*
1372  * END OF "GENERIC" ENCODE ROUTINES.
1373  */
1374
1375 /*
1376  * Encode an ACCESS request
1377  */
1378 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1379 {
1380         struct xdr_stream xdr;
1381         struct compound_hdr hdr = {
1382                 .nops = 3,
1383         };
1384         int status;
1385
1386         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1387         encode_compound_hdr(&xdr, &hdr);
1388         status = encode_putfh(&xdr, args->fh);
1389         if (status != 0)
1390                 goto out;
1391         status = encode_access(&xdr, args->access);
1392         if (status != 0)
1393                 goto out;
1394         status = encode_getfattr(&xdr, args->bitmask);
1395 out:
1396         return status;
1397 }
1398
1399 /*
1400  * Encode LOOKUP request
1401  */
1402 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1403 {
1404         struct xdr_stream xdr;
1405         struct compound_hdr hdr = {
1406                 .nops = 4,
1407         };
1408         int status;
1409
1410         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1411         encode_compound_hdr(&xdr, &hdr);
1412         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1413                 goto out;
1414         if ((status = encode_lookup(&xdr, args->name)) != 0)
1415                 goto out;
1416         if ((status = encode_getfh(&xdr)) != 0)
1417                 goto out;
1418         status = encode_getfattr(&xdr, args->bitmask);
1419 out:
1420         return status;
1421 }
1422
1423 /*
1424  * Encode LOOKUP_ROOT request
1425  */
1426 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1427 {
1428         struct xdr_stream xdr;
1429         struct compound_hdr hdr = {
1430                 .nops = 3,
1431         };
1432         int status;
1433
1434         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1435         encode_compound_hdr(&xdr, &hdr);
1436         if ((status = encode_putrootfh(&xdr)) != 0)
1437                 goto out;
1438         if ((status = encode_getfh(&xdr)) == 0)
1439                 status = encode_getfattr(&xdr, args->bitmask);
1440 out:
1441         return status;
1442 }
1443
1444 /*
1445  * Encode REMOVE request
1446  */
1447 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1448 {
1449         struct xdr_stream xdr;
1450         struct compound_hdr hdr = {
1451                 .nops = 3,
1452         };
1453         int status;
1454
1455         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1456         encode_compound_hdr(&xdr, &hdr);
1457         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1458                 goto out;
1459         if ((status = encode_remove(&xdr, &args->name)) != 0)
1460                 goto out;
1461         status = encode_getfattr(&xdr, args->bitmask);
1462 out:
1463         return status;
1464 }
1465
1466 /*
1467  * Encode RENAME request
1468  */
1469 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1470 {
1471         struct xdr_stream xdr;
1472         struct compound_hdr hdr = {
1473                 .nops = 7,
1474         };
1475         int status;
1476
1477         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1478         encode_compound_hdr(&xdr, &hdr);
1479         if ((status = encode_putfh(&xdr, args->old_dir)) != 0)
1480                 goto out;
1481         if ((status = encode_savefh(&xdr)) != 0)
1482                 goto out;
1483         if ((status = encode_putfh(&xdr, args->new_dir)) != 0)
1484                 goto out;
1485         if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0)
1486                 goto out;
1487         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1488                 goto out;
1489         if ((status = encode_restorefh(&xdr)) != 0)
1490                 goto out;
1491         status = encode_getfattr(&xdr, args->bitmask);
1492 out:
1493         return status;
1494 }
1495
1496 /*
1497  * Encode LINK request
1498  */
1499 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1500 {
1501         struct xdr_stream xdr;
1502         struct compound_hdr hdr = {
1503                 .nops = 7,
1504         };
1505         int status;
1506
1507         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1508         encode_compound_hdr(&xdr, &hdr);
1509         if ((status = encode_putfh(&xdr, args->fh)) != 0)
1510                 goto out;
1511         if ((status = encode_savefh(&xdr)) != 0)
1512                 goto out;
1513         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1514                 goto out;
1515         if ((status = encode_link(&xdr, args->name)) != 0)
1516                 goto out;
1517         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1518                 goto out;
1519         if ((status = encode_restorefh(&xdr)) != 0)
1520                 goto out;
1521         status = encode_getfattr(&xdr, args->bitmask);
1522 out:
1523         return status;
1524 }
1525
1526 /*
1527  * Encode CREATE request
1528  */
1529 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1530 {
1531         struct xdr_stream xdr;
1532         struct compound_hdr hdr = {
1533                 .nops = 7,
1534         };
1535         int status;
1536
1537         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1538         encode_compound_hdr(&xdr, &hdr);
1539         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
1540                 goto out;
1541         if ((status = encode_savefh(&xdr)) != 0)
1542                 goto out;
1543         if ((status = encode_create(&xdr, args)) != 0)
1544                 goto out;
1545         if ((status = encode_getfh(&xdr)) != 0)
1546                 goto out;
1547         if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)
1548                 goto out;
1549         if ((status = encode_restorefh(&xdr)) != 0)
1550                 goto out;
1551         status = encode_getfattr(&xdr, args->bitmask);
1552 out:
1553         return status;
1554 }
1555
1556 /*
1557  * Encode SYMLINK request
1558  */
1559 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1560 {
1561         return nfs4_xdr_enc_create(req, p, args);
1562 }
1563
1564 /*
1565  * Encode GETATTR request
1566  */
1567 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1568 {
1569         struct xdr_stream xdr;
1570         struct compound_hdr hdr = {
1571                 .nops = 2,
1572         };
1573         int status;
1574
1575         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1576         encode_compound_hdr(&xdr, &hdr);
1577         if ((status = encode_putfh(&xdr, args->fh)) == 0)
1578                 status = encode_getfattr(&xdr, args->bitmask);
1579         return status;
1580 }
1581
1582 /*
1583  * Encode a CLOSE request
1584  */
1585 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1586 {
1587         struct xdr_stream xdr;
1588         struct compound_hdr hdr = {
1589                 .nops   = 3,
1590         };
1591         int status;
1592
1593         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1594         encode_compound_hdr(&xdr, &hdr);
1595         status = encode_putfh(&xdr, args->fh);
1596         if(status)
1597                 goto out;
1598         status = encode_close(&xdr, args);
1599         if (status != 0)
1600                 goto out;
1601         status = encode_getfattr(&xdr, args->bitmask);
1602 out:
1603         return status;
1604 }
1605
1606 /*
1607  * Encode an OPEN request
1608  */
1609 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1610 {
1611         struct xdr_stream xdr;
1612         struct compound_hdr hdr = {
1613                 .nops = 7,
1614         };
1615         int status;
1616
1617         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1618         encode_compound_hdr(&xdr, &hdr);
1619         status = encode_putfh(&xdr, args->fh);
1620         if (status)
1621                 goto out;
1622         status = encode_savefh(&xdr);
1623         if (status)
1624                 goto out;
1625         status = encode_open(&xdr, args);
1626         if (status)
1627                 goto out;
1628         status = encode_getfh(&xdr);
1629         if (status)
1630                 goto out;
1631         status = encode_getfattr(&xdr, args->bitmask);
1632         if (status)
1633                 goto out;
1634         status = encode_restorefh(&xdr);
1635         if (status)
1636                 goto out;
1637         status = encode_getfattr(&xdr, args->bitmask);
1638 out:
1639         return status;
1640 }
1641
1642 /*
1643  * Encode an OPEN_CONFIRM request
1644  */
1645 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1646 {
1647         struct xdr_stream xdr;
1648         struct compound_hdr hdr = {
1649                 .nops   = 2,
1650         };
1651         int status;
1652
1653         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1654         encode_compound_hdr(&xdr, &hdr);
1655         status = encode_putfh(&xdr, args->fh);
1656         if(status)
1657                 goto out;
1658         status = encode_open_confirm(&xdr, args);
1659 out:
1660         return status;
1661 }
1662
1663 /*
1664  * Encode an OPEN request with no attributes.
1665  */
1666 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1667 {
1668         struct xdr_stream xdr;
1669         struct compound_hdr hdr = {
1670                 .nops   = 3,
1671         };
1672         int status;
1673
1674         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1675         encode_compound_hdr(&xdr, &hdr);
1676         status = encode_putfh(&xdr, args->fh);
1677         if (status)
1678                 goto out;
1679         status = encode_open(&xdr, args);
1680         if (status)
1681                 goto out;
1682         status = encode_getfattr(&xdr, args->bitmask);
1683 out:
1684         return status;
1685 }
1686
1687 /*
1688  * Encode an OPEN_DOWNGRADE request
1689  */
1690 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1691 {
1692         struct xdr_stream xdr;
1693         struct compound_hdr hdr = {
1694                 .nops   = 3,
1695         };
1696         int status;
1697
1698         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1699         encode_compound_hdr(&xdr, &hdr);
1700         status = encode_putfh(&xdr, args->fh);
1701         if (status)
1702                 goto out;
1703         status = encode_open_downgrade(&xdr, args);
1704         if (status != 0)
1705                 goto out;
1706         status = encode_getfattr(&xdr, args->bitmask);
1707 out:
1708         return status;
1709 }
1710
1711 /*
1712  * Encode a LOCK request
1713  */
1714 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1715 {
1716         struct xdr_stream xdr;
1717         struct compound_hdr hdr = {
1718                 .nops   = 2,
1719         };
1720         int status;
1721
1722         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1723         encode_compound_hdr(&xdr, &hdr);
1724         status = encode_putfh(&xdr, args->fh);
1725         if(status)
1726                 goto out;
1727         status = encode_lock(&xdr, args);
1728 out:
1729         return status;
1730 }
1731
1732 /*
1733  * Encode a LOCKT request
1734  */
1735 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1736 {
1737         struct xdr_stream xdr;
1738         struct compound_hdr hdr = {
1739                 .nops   = 2,
1740         };
1741         int status;
1742
1743         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744         encode_compound_hdr(&xdr, &hdr);
1745         status = encode_putfh(&xdr, args->fh);
1746         if(status)
1747                 goto out;
1748         status = encode_lockt(&xdr, args);
1749 out:
1750         return status;
1751 }
1752
1753 /*
1754  * Encode a LOCKU request
1755  */
1756 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1757 {
1758         struct xdr_stream xdr;
1759         struct compound_hdr hdr = {
1760                 .nops   = 2,
1761         };
1762         int status;
1763
1764         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1765         encode_compound_hdr(&xdr, &hdr);
1766         status = encode_putfh(&xdr, args->fh);
1767         if(status)
1768                 goto out;
1769         status = encode_locku(&xdr, args);
1770 out:
1771         return status;
1772 }
1773
1774 /*
1775  * Encode a READLINK request
1776  */
1777 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1778 {
1779         struct xdr_stream xdr;
1780         struct compound_hdr hdr = {
1781                 .nops = 2,
1782         };
1783         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1784         unsigned int replen;
1785         int status;
1786
1787         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1788         encode_compound_hdr(&xdr, &hdr);
1789         status = encode_putfh(&xdr, args->fh);
1790         if(status)
1791                 goto out;
1792         status = encode_readlink(&xdr, args, req);
1793
1794         /* set up reply kvec
1795          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1796          *      + OP_READLINK + status + string length = 8
1797          */
1798         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
1799         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1800                         args->pgbase, args->pglen);
1801
1802 out:
1803         return status;
1804 }
1805
1806 /*
1807  * Encode a READDIR request
1808  */
1809 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1810 {
1811         struct xdr_stream xdr;
1812         struct compound_hdr hdr = {
1813                 .nops = 2,
1814         };
1815         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1816         int replen;
1817         int status;
1818
1819         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1820         encode_compound_hdr(&xdr, &hdr);
1821         status = encode_putfh(&xdr, args->fh);
1822         if(status)
1823                 goto out;
1824         status = encode_readdir(&xdr, args, req);
1825
1826         /* set up reply kvec
1827          *    toplevel_status + taglen + rescount + OP_PUTFH + status
1828          *      + OP_READDIR + status + verifer(2)  = 9
1829          */
1830         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
1831         xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
1832                          args->pgbase, args->count);
1833         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1834                         __FUNCTION__, replen, args->pages,
1835                         args->pgbase, args->count);
1836
1837 out:
1838         return status;
1839 }
1840
1841 /*
1842  * Encode a READ request
1843  */
1844 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1845 {
1846         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1847         struct xdr_stream xdr;
1848         struct compound_hdr hdr = {
1849                 .nops = 2,
1850         };
1851         int replen, status;
1852
1853         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1854         encode_compound_hdr(&xdr, &hdr);
1855         status = encode_putfh(&xdr, args->fh);
1856         if (status)
1857                 goto out;
1858         status = encode_read(&xdr, args);
1859         if (status)
1860                 goto out;
1861
1862         /* set up reply kvec
1863          *    toplevel status + taglen=0 + rescount + OP_PUTFH + status
1864          *       + OP_READ + status + eof + datalen = 9
1865          */
1866         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
1867         xdr_inline_pages(&req->rq_rcv_buf, replen,
1868                          args->pages, args->pgbase, args->count);
1869         req->rq_rcv_buf.flags |= XDRBUF_READ;
1870 out:
1871         return status;
1872 }
1873
1874 /*
1875  * Encode an SETATTR request
1876  */
1877 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1878
1879 {
1880         struct xdr_stream xdr;
1881         struct compound_hdr hdr = {
1882                 .nops   = 3,
1883         };
1884         int status;
1885
1886         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1887         encode_compound_hdr(&xdr, &hdr);
1888         status = encode_putfh(&xdr, args->fh);
1889         if(status)
1890                 goto out;
1891         status = encode_setattr(&xdr, args, args->server);
1892         if(status)
1893                 goto out;
1894         status = encode_getfattr(&xdr, args->bitmask);
1895 out:
1896         return status;
1897 }
1898
1899 /*
1900  * Encode a GETACL request
1901  */
1902 static int
1903 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1904                 struct nfs_getaclargs *args)
1905 {
1906         struct xdr_stream xdr;
1907         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
1908         struct compound_hdr hdr = {
1909                 .nops   = 2,
1910         };
1911         int replen, status;
1912
1913         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1914         encode_compound_hdr(&xdr, &hdr);
1915         status = encode_putfh(&xdr, args->fh);
1916         if (status)
1917                 goto out;
1918         status = encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0);
1919         /* set up reply buffer: */
1920         replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
1921         xdr_inline_pages(&req->rq_rcv_buf, replen,
1922                 args->acl_pages, args->acl_pgbase, args->acl_len);
1923 out:
1924         return status;
1925 }
1926
1927 /*
1928  * Encode a WRITE request
1929  */
1930 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1931 {
1932         struct xdr_stream xdr;
1933         struct compound_hdr hdr = {
1934                 .nops = 3,
1935         };
1936         int status;
1937
1938         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1939         encode_compound_hdr(&xdr, &hdr);
1940         status = encode_putfh(&xdr, args->fh);
1941         if (status)
1942                 goto out;
1943         status = encode_write(&xdr, args);
1944         if (status)
1945                 goto out;
1946         req->rq_snd_buf.flags |= XDRBUF_WRITE;
1947         status = encode_getfattr(&xdr, args->bitmask);
1948 out:
1949         return status;
1950 }
1951
1952 /*
1953  *  a COMMIT request
1954  */
1955 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1956 {
1957         struct xdr_stream xdr;
1958         struct compound_hdr hdr = {
1959                 .nops = 3,
1960         };
1961         int status;
1962
1963         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964         encode_compound_hdr(&xdr, &hdr);
1965         status = encode_putfh(&xdr, args->fh);
1966         if (status)
1967                 goto out;
1968         status = encode_commit(&xdr, args);
1969         if (status)
1970                 goto out;
1971         status = encode_getfattr(&xdr, args->bitmask);
1972 out:
1973         return status;
1974 }
1975
1976 /*
1977  * FSINFO request
1978  */
1979 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
1980 {
1981         struct xdr_stream xdr;
1982         struct compound_hdr hdr = {
1983                 .nops   = 2,
1984         };
1985         int status;
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, &hdr);
1989         status = encode_putfh(&xdr, args->fh);
1990         if (!status)
1991                 status = encode_fsinfo(&xdr, args->bitmask);
1992         return status;
1993 }
1994
1995 /*
1996  * a PATHCONF request
1997  */
1998 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
1999 {
2000         struct xdr_stream xdr;
2001         struct compound_hdr hdr = {
2002                 .nops = 2,
2003         };
2004         int status;
2005
2006         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007         encode_compound_hdr(&xdr, &hdr);
2008         status = encode_putfh(&xdr, args->fh);
2009         if (!status)
2010                 status = encode_getattr_one(&xdr,
2011                                 args->bitmask[0] & nfs4_pathconf_bitmap[0]);
2012         return status;
2013 }
2014
2015 /*
2016  * a STATFS request
2017  */
2018 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .nops = 2,
2023         };
2024         int status;
2025
2026         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2027         encode_compound_hdr(&xdr, &hdr);
2028         status = encode_putfh(&xdr, args->fh);
2029         if (status == 0)
2030                 status = encode_getattr_two(&xdr,
2031                                 args->bitmask[0] & nfs4_statfs_bitmap[0],
2032                                 args->bitmask[1] & nfs4_statfs_bitmap[1]);
2033         return status;
2034 }
2035
2036 /*
2037  * GETATTR_BITMAP request
2038  */
2039 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, const struct nfs_fh *fhandle)
2040 {
2041         struct xdr_stream xdr;
2042         struct compound_hdr hdr = {
2043                 .nops = 2,
2044         };
2045         int status;
2046
2047         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2048         encode_compound_hdr(&xdr, &hdr);
2049         status = encode_putfh(&xdr, fhandle);
2050         if (status == 0)
2051                 status = encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2052                                 FATTR4_WORD0_LINK_SUPPORT|
2053                                 FATTR4_WORD0_SYMLINK_SUPPORT|
2054                                 FATTR4_WORD0_ACLSUPPORT);
2055         return status;
2056 }
2057
2058 /*
2059  * a RENEW request
2060  */
2061 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2062 {
2063         struct xdr_stream xdr;
2064         struct compound_hdr hdr = {
2065                 .nops   = 1,
2066         };
2067
2068         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2069         encode_compound_hdr(&xdr, &hdr);
2070         return encode_renew(&xdr, clp);
2071 }
2072
2073 /*
2074  * a SETCLIENTID request
2075  */
2076 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2077 {
2078         struct xdr_stream xdr;
2079         struct compound_hdr hdr = {
2080                 .nops   = 1,
2081         };
2082
2083         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084         encode_compound_hdr(&xdr, &hdr);
2085         return encode_setclientid(&xdr, sc);
2086 }
2087
2088 /*
2089  * a SETCLIENTID_CONFIRM request
2090  */
2091 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2092 {
2093         struct xdr_stream xdr;
2094         struct compound_hdr hdr = {
2095                 .nops   = 3,
2096         };
2097         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2098         int status;
2099
2100         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2101         encode_compound_hdr(&xdr, &hdr);
2102         status = encode_setclientid_confirm(&xdr, clp);
2103         if (!status)
2104                 status = encode_putrootfh(&xdr);
2105         if (!status)
2106                 status = encode_fsinfo(&xdr, lease_bitmap);
2107         return status;
2108 }
2109
2110 /*
2111  * DELEGRETURN request
2112  */
2113 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2114 {
2115         struct xdr_stream xdr;
2116         struct compound_hdr hdr = {
2117                 .nops = 3,
2118         };
2119         int status;
2120
2121         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2122         encode_compound_hdr(&xdr, &hdr);
2123         status = encode_putfh(&xdr, args->fhandle);
2124         if (status != 0)
2125                 goto out;
2126         status = encode_delegreturn(&xdr, args->stateid);
2127         if (status != 0)
2128                 goto out;
2129         status = encode_getfattr(&xdr, args->bitmask);
2130 out:
2131         return status;
2132 }
2133
2134 /*
2135  * Encode FS_LOCATIONS request
2136  */
2137 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2138 {
2139         struct xdr_stream xdr;
2140         struct compound_hdr hdr = {
2141                 .nops = 3,
2142         };
2143         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
2144         int replen;
2145         int status;
2146
2147         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2148         encode_compound_hdr(&xdr, &hdr);
2149         if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)
2150                 goto out;
2151         if ((status = encode_lookup(&xdr, args->name)) != 0)
2152                 goto out;
2153         if ((status = encode_fs_locations(&xdr, args->bitmask)) != 0)
2154                 goto out;
2155         /* set up reply
2156          *   toplevel_status + OP_PUTFH + status
2157          *   + OP_LOOKUP + status + OP_GETATTR + status = 7
2158          */
2159         replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
2160         xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
2161                         0, PAGE_SIZE);
2162 out:
2163         return status;
2164 }
2165
2166 /*
2167  * START OF "GENERIC" DECODE ROUTINES.
2168  *   These may look a little ugly since they are imported from a "generic"
2169  * set of XDR encode/decode routines which are intended to be shared by
2170  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2171  *
2172  * If the pain of reading these is too great, it should be a straightforward
2173  * task to translate them into Linux-specific versions which are more
2174  * consistent with the style used in NFSv2/v3...
2175  */
2176 #define READ32(x)         (x) = ntohl(*p++)
2177 #define READ64(x)         do {                  \
2178         (x) = (u64)ntohl(*p++) << 32;           \
2179         (x) |= ntohl(*p++);                     \
2180 } while (0)
2181 #define READTIME(x)       do {                  \
2182         p++;                                    \
2183         (x.tv_sec) = ntohl(*p++);               \
2184         (x.tv_nsec) = ntohl(*p++);              \
2185 } while (0)
2186 #define COPYMEM(x,nbytes) do {                  \
2187         memcpy((x), p, nbytes);                 \
2188         p += XDR_QUADLEN(nbytes);               \
2189 } while (0)
2190
2191 #define READ_BUF(nbytes)  do { \
2192         p = xdr_inline_decode(xdr, nbytes); \
2193         if (unlikely(!p)) { \
2194                 dprintk("nfs: %s: prematurely hit end of receive" \
2195                                 " buffer\n", __FUNCTION__); \
2196                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2197                                 __FUNCTION__, xdr->p, nbytes, xdr->end); \
2198                 return -EIO; \
2199         } \
2200 } while (0)
2201
2202 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2203 {
2204         __be32 *p;
2205
2206         READ_BUF(4);
2207         READ32(*len);
2208         READ_BUF(*len);
2209         *string = (char *)p;
2210         return 0;
2211 }
2212
2213 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2214 {
2215         __be32 *p;
2216
2217         READ_BUF(8);
2218         READ32(hdr->status);
2219         READ32(hdr->taglen);
2220
2221         READ_BUF(hdr->taglen + 4);
2222         hdr->tag = (char *)p;
2223         p += XDR_QUADLEN(hdr->taglen);
2224         READ32(hdr->nops);
2225         return 0;
2226 }
2227
2228 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2229 {
2230         __be32 *p;
2231         uint32_t opnum;
2232         int32_t nfserr;
2233
2234         READ_BUF(8);
2235         READ32(opnum);
2236         if (opnum != expected) {
2237                 dprintk("nfs: Server returned operation"
2238                         " %d but we issued a request for %d\n",
2239                                 opnum, expected);
2240                 return -EIO;
2241         }
2242         READ32(nfserr);
2243         if (nfserr != NFS_OK)
2244                 return -nfs4_stat_to_errno(nfserr);
2245         return 0;
2246 }
2247
2248 /* Dummy routine */
2249 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2250 {
2251         __be32 *p;
2252         unsigned int strlen;
2253         char *str;
2254
2255         READ_BUF(12);
2256         return decode_opaque_inline(xdr, &strlen, &str);
2257 }
2258
2259 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2260 {
2261         uint32_t bmlen;
2262         __be32 *p;
2263
2264         READ_BUF(4);
2265         READ32(bmlen);
2266
2267         bitmap[0] = bitmap[1] = 0;
2268         READ_BUF((bmlen << 2));
2269         if (bmlen > 0) {
2270                 READ32(bitmap[0]);
2271                 if (bmlen > 1)
2272                         READ32(bitmap[1]);
2273         }
2274         return 0;
2275 }
2276
2277 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2278 {
2279         __be32 *p;
2280
2281         READ_BUF(4);
2282         READ32(*attrlen);
2283         *savep = xdr->p;
2284         return 0;
2285 }
2286
2287 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2288 {
2289         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2290                 decode_attr_bitmap(xdr, bitmask);
2291                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2292         } else
2293                 bitmask[0] = bitmask[1] = 0;
2294         dprintk("%s: bitmask=0x%x%x\n", __FUNCTION__, bitmask[0], bitmask[1]);
2295         return 0;
2296 }
2297
2298 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2299 {
2300         __be32 *p;
2301
2302         *type = 0;
2303         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2304                 return -EIO;
2305         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2306                 READ_BUF(4);
2307                 READ32(*type);
2308                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2309                         dprintk("%s: bad type %d\n", __FUNCTION__, *type);
2310                         return -EIO;
2311                 }
2312                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2313         }
2314         dprintk("%s: type=0%o\n", __FUNCTION__, nfs_type2fmt[*type].nfs2type);
2315         return 0;
2316 }
2317
2318 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2319 {
2320         __be32 *p;
2321
2322         *change = 0;
2323         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2324                 return -EIO;
2325         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2326                 READ_BUF(8);
2327                 READ64(*change);
2328                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2329         }
2330         dprintk("%s: change attribute=%Lu\n", __FUNCTION__,
2331                         (unsigned long long)*change);
2332         return 0;
2333 }
2334
2335 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2336 {
2337         __be32 *p;
2338
2339         *size = 0;
2340         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2341                 return -EIO;
2342         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2343                 READ_BUF(8);
2344                 READ64(*size);
2345                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2346         }
2347         dprintk("%s: file size=%Lu\n", __FUNCTION__, (unsigned long long)*size);
2348         return 0;
2349 }
2350
2351 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2352 {
2353         __be32 *p;
2354
2355         *res = 0;
2356         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2357                 return -EIO;
2358         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2359                 READ_BUF(4);
2360                 READ32(*res);
2361                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2362         }
2363         dprintk("%s: link support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2364         return 0;
2365 }
2366
2367 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2368 {
2369         __be32 *p;
2370
2371         *res = 0;
2372         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2373                 return -EIO;
2374         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2375                 READ_BUF(4);
2376                 READ32(*res);
2377                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2378         }
2379         dprintk("%s: symlink support=%s\n", __FUNCTION__, *res == 0 ? "false" : "true");
2380         return 0;
2381 }
2382
2383 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2384 {
2385         __be32 *p;
2386
2387         fsid->major = 0;
2388         fsid->minor = 0;
2389         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2390                 return -EIO;
2391         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2392                 READ_BUF(16);
2393                 READ64(fsid->major);
2394                 READ64(fsid->minor);
2395                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2396         }
2397         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __FUNCTION__,
2398                         (unsigned long long)fsid->major,
2399                         (unsigned long long)fsid->minor);
2400         return 0;
2401 }
2402
2403 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2404 {
2405         __be32 *p;
2406
2407         *res = 60;
2408         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2409                 return -EIO;
2410         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2411                 READ_BUF(4);
2412                 READ32(*res);
2413                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2414         }
2415         dprintk("%s: file size=%u\n", __FUNCTION__, (unsigned int)*res);
2416         return 0;
2417 }
2418
2419 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2420 {
2421         __be32 *p;
2422
2423         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2424         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2425                 return -EIO;
2426         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2427                 READ_BUF(4);
2428                 READ32(*res);
2429                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2430         }
2431         dprintk("%s: ACLs supported=%u\n", __FUNCTION__, (unsigned int)*res);
2432         return 0;
2433 }
2434
2435 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2436 {
2437         __be32 *p;
2438
2439         *fileid = 0;
2440         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2441                 return -EIO;
2442         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2443                 READ_BUF(8);
2444                 READ64(*fileid);
2445                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2446         }
2447         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2448         return 0;
2449 }
2450
2451 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2452 {
2453         __be32 *p;
2454
2455         *fileid = 0;
2456         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2457                 return -EIO;
2458         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2459                 READ_BUF(8);
2460                 READ64(*fileid);
2461                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2462         }
2463         dprintk("%s: fileid=%Lu\n", __FUNCTION__, (unsigned long long)*fileid);
2464         return 0;
2465 }
2466
2467 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2468 {
2469         __be32 *p;
2470         int status = 0;
2471
2472         *res = 0;
2473         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2474                 return -EIO;
2475         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2476                 READ_BUF(8);
2477                 READ64(*res);
2478                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2479         }
2480         dprintk("%s: files avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2481         return status;
2482 }
2483
2484 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2485 {
2486         __be32 *p;
2487         int status = 0;
2488
2489         *res = 0;
2490         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2491                 return -EIO;
2492         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2493                 READ_BUF(8);
2494                 READ64(*res);
2495                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2496         }
2497         dprintk("%s: files free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2498         return status;
2499 }
2500
2501 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2502 {
2503         __be32 *p;
2504         int status = 0;
2505
2506         *res = 0;
2507         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2508                 return -EIO;
2509         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2510                 READ_BUF(8);
2511                 READ64(*res);
2512                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2513         }
2514         dprintk("%s: files total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2515         return status;
2516 }
2517
2518 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2519 {
2520         u32 n;
2521         __be32 *p;
2522         int status = 0;
2523
2524         READ_BUF(4);
2525         READ32(n);
2526         if (n == 0)
2527                 goto root_path;
2528         dprintk("path ");
2529         path->ncomponents = 0;
2530         while (path->ncomponents < n) {
2531                 struct nfs4_string *component = &path->components[path->ncomponents];
2532                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2533                 if (unlikely(status != 0))
2534                         goto out_eio;
2535                 if (path->ncomponents != n)
2536                         dprintk("/");
2537                 dprintk("%s", component->data);
2538                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2539                         path->ncomponents++;
2540                 else {
2541                         dprintk("cannot parse %d components in path\n", n);
2542                         goto out_eio;
2543                 }
2544         }
2545 out:
2546         dprintk("\n");
2547         return status;
2548 root_path:
2549 /* a root pathname is sent as a zero component4 */
2550         path->ncomponents = 1;
2551         path->components[0].len=0;
2552         path->components[0].data=NULL;
2553         dprintk("path /\n");
2554         goto out;
2555 out_eio:
2556         dprintk(" status %d", status);
2557         status = -EIO;
2558         goto out;
2559 }
2560
2561 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2562 {
2563         int n;
2564         __be32 *p;
2565         int status = -EIO;
2566
2567         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2568                 goto out;
2569         status = 0;
2570         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2571                 goto out;
2572         dprintk("%s: fsroot ", __FUNCTION__);
2573         status = decode_pathname(xdr, &res->fs_path);
2574         if (unlikely(status != 0))
2575                 goto out;
2576         READ_BUF(4);
2577         READ32(n);
2578         if (n <= 0)
2579                 goto out_eio;
2580         res->nlocations = 0;
2581         while (res->nlocations < n) {
2582                 u32 m;
2583                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2584
2585                 READ_BUF(4);
2586                 READ32(m);
2587
2588                 loc->nservers = 0;
2589                 dprintk("%s: servers ", __FUNCTION__);
2590                 while (loc->nservers < m) {
2591                         struct nfs4_string *server = &loc->servers[loc->nservers];
2592                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2593                         if (unlikely(status != 0))
2594                                 goto out_eio;
2595                         dprintk("%s ", server->data);
2596                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2597                                 loc->nservers++;
2598                         else {
2599                                 unsigned int i;
2600                                 dprintk("%s: using first %u of %u servers "
2601                                         "returned for location %u\n",
2602                                                 __FUNCTION__,
2603                                                 NFS4_FS_LOCATION_MAXSERVERS,
2604                                                 m, res->nlocations);
2605                                 for (i = loc->nservers; i < m; i++) {
2606                                         unsigned int len;
2607                                         char *data;
2608                                         status = decode_opaque_inline(xdr, &len, &data);
2609                                         if (unlikely(status != 0))
2610                                                 goto out_eio;
2611                                 }
2612                         }
2613                 }
2614                 status = decode_pathname(xdr, &loc->rootpath);
2615                 if (unlikely(status != 0))
2616                         goto out_eio;
2617                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2618                         res->nlocations++;
2619         }
2620 out:
2621         dprintk("%s: fs_locations done, error = %d\n", __FUNCTION__, status);
2622         return status;
2623 out_eio:
2624         status = -EIO;
2625         goto out;
2626 }
2627
2628 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2629 {
2630         __be32 *p;
2631         int status = 0;
2632
2633         *res = 0;
2634         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2635                 return -EIO;
2636         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2637                 READ_BUF(8);
2638                 READ64(*res);
2639                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2640         }
2641         dprintk("%s: maxfilesize=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2642         return status;
2643 }
2644
2645 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2646 {
2647         __be32 *p;
2648         int status = 0;
2649
2650         *maxlink = 1;
2651         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2652                 return -EIO;
2653         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2654                 READ_BUF(4);
2655                 READ32(*maxlink);
2656                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2657         }
2658         dprintk("%s: maxlink=%u\n", __FUNCTION__, *maxlink);
2659         return status;
2660 }
2661
2662 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2663 {
2664         __be32 *p;
2665         int status = 0;
2666
2667         *maxname = 1024;
2668         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2669                 return -EIO;
2670         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2671                 READ_BUF(4);
2672                 READ32(*maxname);
2673                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2674         }
2675         dprintk("%s: maxname=%u\n", __FUNCTION__, *maxname);
2676         return status;
2677 }
2678
2679 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2680 {
2681         __be32 *p;
2682         int status = 0;
2683
2684         *res = 1024;
2685         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2686                 return -EIO;
2687         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2688                 uint64_t maxread;
2689                 READ_BUF(8);
2690                 READ64(maxread);
2691                 if (maxread > 0x7FFFFFFF)
2692                         maxread = 0x7FFFFFFF;
2693                 *res = (uint32_t)maxread;
2694                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2695         }
2696         dprintk("%s: maxread=%lu\n", __FUNCTION__, (unsigned long)*res);
2697         return status;
2698 }
2699
2700 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2701 {
2702         __be32 *p;
2703         int status = 0;
2704
2705         *res = 1024;
2706         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2707                 return -EIO;
2708         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2709                 uint64_t maxwrite;
2710                 READ_BUF(8);
2711                 READ64(maxwrite);
2712                 if (maxwrite > 0x7FFFFFFF)
2713                         maxwrite = 0x7FFFFFFF;
2714                 *res = (uint32_t)maxwrite;
2715                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2716         }
2717         dprintk("%s: maxwrite=%lu\n", __FUNCTION__, (unsigned long)*res);
2718         return status;
2719 }
2720
2721 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *mode)
2722 {
2723         __be32 *p;
2724
2725         *mode = 0;
2726         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2727                 return -EIO;
2728         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2729                 READ_BUF(4);
2730                 READ32(*mode);
2731                 *mode &= ~S_IFMT;
2732                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2733         }
2734         dprintk("%s: file mode=0%o\n", __FUNCTION__, (unsigned int)*mode);
2735         return 0;
2736 }
2737
2738 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2739 {
2740         __be32 *p;
2741
2742         *nlink = 1;
2743         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2744                 return -EIO;
2745         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2746                 READ_BUF(4);
2747                 READ32(*nlink);
2748                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2749         }
2750         dprintk("%s: nlink=%u\n", __FUNCTION__, (unsigned int)*nlink);
2751         return 0;
2752 }
2753
2754 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2755 {
2756         uint32_t len;
2757         __be32 *p;
2758
2759         *uid = -2;
2760         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2761                 return -EIO;
2762         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2763                 READ_BUF(4);
2764                 READ32(len);
2765                 READ_BUF(len);
2766                 if (len < XDR_MAX_NETOBJ) {
2767                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) != 0)
2768                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2769                                                 __FUNCTION__);
2770                 } else
2771                         dprintk("%s: name too long (%u)!\n",
2772                                         __FUNCTION__, len);
2773                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2774         }
2775         dprintk("%s: uid=%d\n", __FUNCTION__, (int)*uid);
2776         return 0;
2777 }
2778
2779 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2780 {
2781         uint32_t len;
2782         __be32 *p;
2783
2784         *gid = -2;
2785         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2786                 return -EIO;
2787         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2788                 READ_BUF(4);
2789                 READ32(len);
2790                 READ_BUF(len);
2791                 if (len < XDR_MAX_NETOBJ) {
2792                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) != 0)
2793                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2794                                                 __FUNCTION__);
2795                 } else
2796                         dprintk("%s: name too long (%u)!\n",
2797                                         __FUNCTION__, len);
2798                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2799         }
2800         dprintk("%s: gid=%d\n", __FUNCTION__, (int)*gid);
2801         return 0;
2802 }
2803
2804 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2805 {
2806         uint32_t major = 0, minor = 0;
2807         __be32 *p;
2808
2809         *rdev = MKDEV(0,0);
2810         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2811                 return -EIO;
2812         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2813                 dev_t tmp;
2814
2815                 READ_BUF(8);
2816                 READ32(major);
2817                 READ32(minor);
2818                 tmp = MKDEV(major, minor);
2819                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2820                         *rdev = tmp;
2821                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2822         }
2823         dprintk("%s: rdev=(0x%x:0x%x)\n", __FUNCTION__, major, minor);
2824         return 0;
2825 }
2826
2827 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2828 {
2829         __be32 *p;
2830         int status = 0;
2831
2832         *res = 0;
2833         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2834                 return -EIO;
2835         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2836                 READ_BUF(8);
2837                 READ64(*res);
2838                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2839         }
2840         dprintk("%s: space avail=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2841         return status;
2842 }
2843
2844 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2845 {
2846         __be32 *p;
2847         int status = 0;
2848
2849         *res = 0;
2850         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2851                 return -EIO;
2852         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2853                 READ_BUF(8);
2854                 READ64(*res);
2855                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2856         }
2857         dprintk("%s: space free=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2858         return status;
2859 }
2860
2861 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2862 {
2863         __be32 *p;
2864         int status = 0;
2865
2866         *res = 0;
2867         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2868                 return -EIO;
2869         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2870                 READ_BUF(8);
2871                 READ64(*res);
2872                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2873         }
2874         dprintk("%s: space total=%Lu\n", __FUNCTION__, (unsigned long long)*res);
2875         return status;
2876 }
2877
2878 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2879 {
2880         __be32 *p;
2881
2882         *used = 0;
2883         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2884                 return -EIO;
2885         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2886                 READ_BUF(8);
2887                 READ64(*used);
2888                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2889         }
2890         dprintk("%s: space used=%Lu\n", __FUNCTION__,
2891                         (unsigned long long)*used);
2892         return 0;
2893 }
2894
2895 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2896 {
2897         __be32 *p;
2898         uint64_t sec;
2899         uint32_t nsec;
2900
2901         READ_BUF(12);
2902         READ64(sec);
2903         READ32(nsec);
2904         time->tv_sec = (time_t)sec;
2905         time->tv_nsec = (long)nsec;
2906         return 0;
2907 }
2908
2909 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2910 {
2911         int status = 0;
2912
2913         time->tv_sec = 0;
2914         time->tv_nsec = 0;
2915         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
2916                 return -EIO;
2917         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
2918                 status = decode_attr_time(xdr, time);
2919                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
2920         }
2921         dprintk("%s: atime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2922         return status;
2923 }
2924
2925 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2926 {
2927         int status = 0;
2928
2929         time->tv_sec = 0;
2930         time->tv_nsec = 0;
2931         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
2932                 return -EIO;
2933         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
2934                 status = decode_attr_time(xdr, time);
2935                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
2936         }
2937         dprintk("%s: ctime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2938         return status;
2939 }
2940
2941 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
2942 {
2943         int status = 0;
2944
2945         time->tv_sec = 0;
2946         time->tv_nsec = 0;
2947         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
2948                 return -EIO;
2949         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
2950                 status = decode_attr_time(xdr, time);
2951                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
2952         }
2953         dprintk("%s: mtime=%ld\n", __FUNCTION__, (long)time->tv_sec);
2954         return status;
2955 }
2956
2957 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
2958 {
2959         unsigned int attrwords = XDR_QUADLEN(attrlen);
2960         unsigned int nwords = xdr->p - savep;
2961
2962         if (unlikely(attrwords != nwords)) {
2963                 dprintk("%s: server returned incorrect attribute length: "
2964                         "%u %c %u\n",
2965                                 __FUNCTION__,
2966                                 attrwords << 2,
2967                                 (attrwords < nwords) ? '<' : '>',
2968                                 nwords << 2);
2969                 return -EIO;
2970         }
2971         return 0;
2972 }
2973
2974 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
2975 {
2976         __be32 *p;
2977
2978         READ_BUF(20);
2979         READ32(cinfo->atomic);
2980         READ64(cinfo->before);
2981         READ64(cinfo->after);
2982         return 0;
2983 }
2984
2985 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
2986 {
2987         __be32 *p;
2988         uint32_t supp, acc;
2989         int status;
2990
2991         status = decode_op_hdr(xdr, OP_ACCESS);
2992         if (status)
2993                 return status;
2994         READ_BUF(8);
2995         READ32(supp);
2996         READ32(acc);
2997         access->supported = supp;
2998         access->access = acc;
2999         return 0;
3000 }
3001
3002 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3003 {
3004         __be32 *p;
3005         int status;
3006
3007         status = decode_op_hdr(xdr, OP_CLOSE);
3008         if (status)
3009                 return status;
3010         READ_BUF(NFS4_STATEID_SIZE);
3011         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3012         return 0;
3013 }
3014
3015 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3016 {
3017         __be32 *p;
3018         int status;
3019
3020         status = decode_op_hdr(xdr, OP_COMMIT);
3021         if (status)
3022                 return status;
3023         READ_BUF(8);
3024         COPYMEM(res->verf->verifier, 8);
3025         return 0;
3026 }
3027
3028 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3029 {
3030         __be32 *p;
3031         uint32_t bmlen;
3032         int status;
3033
3034         status = decode_op_hdr(xdr, OP_CREATE);
3035         if (status)
3036                 return status;
3037         if ((status = decode_change_info(xdr, cinfo)))
3038                 return status;
3039         READ_BUF(4);
3040         READ32(bmlen);
3041         READ_BUF(bmlen << 2);
3042         return 0;
3043 }
3044
3045 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3046 {
3047         __be32 *savep;
3048         uint32_t attrlen,
3049                  bitmap[2] = {0};
3050         int status;
3051
3052         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3053                 goto xdr_error;
3054         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3055                 goto xdr_error;
3056         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3057                 goto xdr_error;
3058         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3059                 goto xdr_error;
3060         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3061                 goto xdr_error;
3062         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3063                 goto xdr_error;
3064         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3065                 goto xdr_error;
3066         status = verify_attr_len(xdr, savep, attrlen);
3067 xdr_error:
3068         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3069         return status;
3070 }
3071
3072 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3073 {
3074         __be32 *savep;
3075         uint32_t attrlen,
3076                  bitmap[2] = {0};
3077         int status;
3078
3079         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3080                 goto xdr_error;
3081         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3082                 goto xdr_error;
3083         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3084                 goto xdr_error;
3085
3086         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3087                 goto xdr_error;
3088         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3089                 goto xdr_error;
3090         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3091                 goto xdr_error;
3092         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3093                 goto xdr_error;
3094         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3095                 goto xdr_error;
3096         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3097                 goto xdr_error;
3098
3099         status = verify_attr_len(xdr, savep, attrlen);
3100 xdr_error:
3101         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3102         return status;
3103 }
3104
3105 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3106 {
3107         __be32 *savep;
3108         uint32_t attrlen,
3109                  bitmap[2] = {0};
3110         int status;
3111
3112         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3113                 goto xdr_error;
3114         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3115                 goto xdr_error;
3116         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3117                 goto xdr_error;
3118
3119         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3120                 goto xdr_error;
3121         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3122                 goto xdr_error;
3123
3124         status = verify_attr_len(xdr, savep, attrlen);
3125 xdr_error:
3126         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3127         return status;
3128 }
3129
3130 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3131 {
3132         __be32 *savep;
3133         uint32_t attrlen,
3134                  bitmap[2] = {0},
3135                  type;
3136         int status, fmode = 0;
3137         uint64_t fileid;
3138
3139         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3140                 goto xdr_error;
3141         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3142                 goto xdr_error;
3143
3144         fattr->bitmap[0] = bitmap[0];
3145         fattr->bitmap[1] = bitmap[1];
3146
3147         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3148                 goto xdr_error;
3149
3150
3151         if ((status = decode_attr_type(xdr, bitmap, &type)) != 0)
3152                 goto xdr_error;
3153         fattr->type = nfs_type2fmt[type].nfs2type;
3154         fmode = nfs_type2fmt[type].mode;
3155
3156         if ((status = decode_attr_change(xdr, bitmap, &fattr->change_attr)) != 0)
3157                 goto xdr_error;
3158         if ((status = decode_attr_size(xdr, bitmap, &fattr->size)) != 0)
3159                 goto xdr_error;
3160         if ((status = decode_attr_fsid(xdr, bitmap, &fattr->fsid)) != 0)
3161                 goto xdr_error;
3162         if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
3163                 goto xdr_error;
3164         if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3165                                                 struct nfs4_fs_locations,
3166                                                 fattr))) != 0)
3167                 goto xdr_error;
3168         if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
3169                 goto xdr_error;
3170         fattr->mode |= fmode;
3171         if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
3172                 goto xdr_error;
3173         if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
3174                 goto xdr_error;
3175         if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
3176                 goto xdr_error;
3177         if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
3178                 goto xdr_error;
3179         if ((status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used)) != 0)
3180                 goto xdr_error;
3181         if ((status = decode_attr_time_access(xdr, bitmap, &fattr->atime)) != 0)
3182                 goto xdr_error;
3183         if ((status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime)) != 0)
3184                 goto xdr_error;
3185         if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0)
3186                 goto xdr_error;
3187         if ((status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid)) != 0)
3188                 goto xdr_error;
3189         if (fattr->fileid == 0 && fileid != 0)
3190                 fattr->fileid = fileid;
3191         if ((status = verify_attr_len(xdr, savep, attrlen)) == 0)
3192                 fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4;
3193 xdr_error:
3194         dprintk("%s: xdr returned %d\n", __FUNCTION__, -status);
3195         return status;
3196 }
3197
3198
3199 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3200 {
3201         __be32 *savep;
3202         uint32_t attrlen, bitmap[2];
3203         int status;
3204
3205         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3206                 goto xdr_error;
3207         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3208                 goto xdr_error;
3209         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3210                 goto xdr_error;
3211
3212         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3213
3214         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3215                 goto xdr_error;
3216         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3217                 goto xdr_error;
3218         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3219                 goto xdr_error;
3220         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3221         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3222                 goto xdr_error;
3223         fsinfo->wtpref = fsinfo->wtmax;
3224
3225         status = verify_attr_len(xdr, savep, attrlen);
3226 xdr_error:
3227         dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status);
3228         return status;
3229 }
3230
3231 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3232 {
3233         __be32 *p;
3234         uint32_t len;
3235         int status;
3236
3237         /* Zero handle first to allow comparisons */
3238         memset(fh, 0, sizeof(*fh));
3239
3240         status = decode_op_hdr(xdr, OP_GETFH);
3241         if (status)
3242                 return status;
3243
3244         READ_BUF(4);
3245         READ32(len);
3246         if (len > NFS4_FHSIZE)
3247                 return -EIO;
3248         fh->size = len;
3249         READ_BUF(len);
3250         COPYMEM(fh->data, len);
3251         return 0;
3252 }
3253
3254 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3255 {
3256         int status;
3257
3258         status = decode_op_hdr(xdr, OP_LINK);
3259         if (status)
3260                 return status;
3261         return decode_change_info(xdr, cinfo);
3262 }
3263
3264 /*
3265  * We create the owner, so we know a proper owner.id length is 4.
3266  */
3267 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3268 {
3269         uint64_t offset, length, clientid;
3270         __be32 *p;
3271         uint32_t namelen, type;
3272
3273         READ_BUF(32);
3274         READ64(offset);
3275         READ64(length);
3276         READ32(type);
3277         if (fl != NULL) {
3278                 fl->fl_start = (loff_t)offset;
3279                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3280                 if (length == ~(uint64_t)0)
3281                         fl->fl_end = OFFSET_MAX;
3282                 fl->fl_type = F_WRLCK;
3283                 if (type & 1)
3284                         fl->fl_type = F_RDLCK;
3285                 fl->fl_pid = 0;
3286         }
3287         READ64(clientid);
3288         READ32(namelen);
3289         READ_BUF(namelen);
3290         return -NFS4ERR_DENIED;
3291 }
3292
3293 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3294 {
3295         __be32 *p;
3296         int status;
3297
3298         status = decode_op_hdr(xdr, OP_LOCK);
3299         if (status == 0) {
3300                 READ_BUF(NFS4_STATEID_SIZE);
3301                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3302         } else if (status == -NFS4ERR_DENIED)
3303                 return decode_lock_denied(xdr, NULL);
3304         return status;
3305 }
3306
3307 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3308 {
3309         int status;
3310         status = decode_op_hdr(xdr, OP_LOCKT);
3311         if (status == -NFS4ERR_DENIED)
3312                 return decode_lock_denied(xdr, res->denied);
3313         return status;
3314 }
3315
3316 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3317 {
3318         __be32 *p;
3319         int status;
3320
3321         status = decode_op_hdr(xdr, OP_LOCKU);
3322         if (status == 0) {
3323                 READ_BUF(NFS4_STATEID_SIZE);
3324                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3325         }
3326         return status;
3327 }
3328
3329 static int decode_lookup(struct xdr_stream *xdr)
3330 {
3331         return decode_op_hdr(xdr, OP_LOOKUP);
3332 }
3333
3334 /* This is too sick! */
3335 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3336 {
3337         __be32 *p;
3338         uint32_t limit_type, nblocks, blocksize;
3339
3340         READ_BUF(12);
3341         READ32(limit_type);
3342         switch (limit_type) {
3343                 case 1:
3344                         READ64(*maxsize);
3345                         break;
3346                 case 2:
3347                         READ32(nblocks);
3348                         READ32(blocksize);
3349                         *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3350         }
3351         return 0;
3352 }
3353
3354 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3355 {
3356         __be32 *p;
3357         uint32_t delegation_type;
3358
3359         READ_BUF(4);
3360         READ32(delegation_type);
3361         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3362                 res->delegation_type = 0;
3363                 return 0;
3364         }
3365         READ_BUF(NFS4_STATEID_SIZE+4);
3366         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3367         READ32(res->do_recall);
3368         switch (delegation_type) {
3369                 case NFS4_OPEN_DELEGATE_READ:
3370                         res->delegation_type = FMODE_READ;
3371                         break;
3372                 case NFS4_OPEN_DELEGATE_WRITE:
3373                         res->delegation_type = FMODE_WRITE|FMODE_READ;
3374                         if (decode_space_limit(xdr, &res->maxsize) < 0)
3375                                 return -EIO;
3376         }
3377         return decode_ace(xdr, NULL, res->server->nfs_client);
3378 }
3379
3380 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3381 {
3382         __be32 *p;
3383         uint32_t savewords, bmlen, i;
3384         int status;
3385
3386         status = decode_op_hdr(xdr, OP_OPEN);
3387         if (status)
3388                 return status;
3389         READ_BUF(NFS4_STATEID_SIZE);
3390         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3391
3392         decode_change_info(xdr, &res->cinfo);
3393
3394         READ_BUF(8);
3395         READ32(res->rflags);
3396         READ32(bmlen);
3397         if (bmlen > 10)
3398                 goto xdr_error;
3399
3400         READ_BUF(bmlen << 2);
3401         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3402         for (i = 0; i < savewords; ++i)
3403                 READ32(res->attrset[i]);
3404         for (; i < NFS4_BITMAP_SIZE; i++)
3405                 res->attrset[i] = 0;
3406
3407         return decode_delegation(xdr, res);
3408 xdr_error:
3409         dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
3410         return -EIO;
3411 }
3412
3413 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3414 {
3415         __be32 *p;
3416         int status;
3417
3418         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3419         if (status)
3420                 return status;
3421         READ_BUF(NFS4_STATEID_SIZE);
3422         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3423         return 0;
3424 }
3425
3426 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3427 {
3428         __be32 *p;
3429         int status;
3430
3431         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3432         if (status)
3433                 return status;
3434         READ_BUF(NFS4_STATEID_SIZE);
3435         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3436         return 0;
3437 }
3438
3439 static int decode_putfh(struct xdr_stream *xdr)
3440 {
3441         return decode_op_hdr(xdr, OP_PUTFH);
3442 }
3443
3444 static int decode_putrootfh(struct xdr_stream *xdr)
3445 {
3446         return decode_op_hdr(xdr, OP_PUTROOTFH);
3447 }
3448
3449 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3450 {
3451         struct kvec *iov = req->rq_rcv_buf.head;
3452         __be32 *p;
3453         uint32_t count, eof, recvd, hdrlen;
3454         int status;
3455
3456         status = decode_op_hdr(xdr, OP_READ);
3457         if (status)
3458                 return status;
3459         READ_BUF(8);
3460         READ32(eof);
3461         READ32(count);
3462         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3463         recvd = req->rq_rcv_buf.len - hdrlen;
3464         if (count > recvd) {
3465                 dprintk("NFS: server cheating in read reply: "
3466                                 "count %u > recvd %u\n", count, recvd);
3467                 count = recvd;
3468                 eof = 0;
3469         }
3470         xdr_read_pages(xdr, count);
3471         res->eof = eof;
3472         res->count = count;
3473         return 0;
3474 }
3475
3476 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3477 {
3478         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3479         struct page     *page = *rcvbuf->pages;
3480         struct kvec     *iov = rcvbuf->head;
3481         size_t          hdrlen;
3482         u32             recvd, pglen = rcvbuf->page_len;
3483         __be32          *end, *entry, *p, *kaddr;
3484         unsigned int    nr;
3485         int             status;
3486
3487         status = decode_op_hdr(xdr, OP_READDIR);
3488         if (status)
3489                 return status;
3490         READ_BUF(8);
3491         COPYMEM(readdir->verifier.data, 8);
3492         dprintk("%s: verifier = 0x%x%x\n",
3493                         __FUNCTION__,
3494                         ((u32 *)readdir->verifier.data)[0],
3495                         ((u32 *)readdir->verifier.data)[1]);
3496
3497
3498         hdrlen = (char *) p - (char *) iov->iov_base;
3499         recvd = rcvbuf->len - hdrlen;
3500         if (pglen > recvd)
3501                 pglen = recvd;
3502         xdr_read_pages(xdr, pglen);
3503
3504         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3505         kaddr = p = kmap_atomic(page, KM_USER0);
3506         end = p + ((pglen + readdir->pgbase) >> 2);
3507         entry = p;
3508         for (nr = 0; *p++; nr++) {
3509                 u32 len, attrlen, xlen;
3510                 if (end - p < 3)
3511                         goto short_pkt;
3512                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3513                 p += 2;                 /* cookie */
3514                 len = ntohl(*p++);      /* filename length */
3515                 if (len > NFS4_MAXNAMLEN) {
3516                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3517                                         len);
3518                         goto err_unmap;
3519                 }
3520                 xlen = XDR_QUADLEN(len);
3521                 if (end - p < xlen + 1)
3522                         goto short_pkt;
3523                 dprintk("filename = %*s\n", len, (char *)p);
3524                 p += xlen;
3525                 len = ntohl(*p++);      /* bitmap length */
3526                 if (end - p < len + 1)
3527                         goto short_pkt;
3528                 p += len;
3529                 attrlen = XDR_QUADLEN(ntohl(*p++));
3530                 if (end - p < attrlen + 2)
3531                         goto short_pkt;
3532                 p += attrlen;           /* attributes */
3533                 entry = p;
3534         }
3535         if (!nr && (entry[0] != 0 || entry[1] == 0))
3536                 goto short_pkt;
3537 out:
3538         kunmap_atomic(kaddr, KM_USER0);
3539         return 0;
3540 short_pkt:
3541         dprintk("%s: short packet at entry %d\n", __FUNCTION__, nr);
3542         entry[0] = entry[1] = 0;
3543         /* truncate listing ? */
3544         if (!nr) {
3545                 dprintk("NFS: readdir reply truncated!\n");
3546                 entry[1] = 1;
3547         }
3548         goto out;
3549 err_unmap:
3550         kunmap_atomic(kaddr, KM_USER0);
3551         return -errno_NFSERR_IO;
3552 }
3553
3554 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3555 {
3556         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3557         struct kvec *iov = rcvbuf->head;
3558         size_t hdrlen;
3559         u32 len, recvd;
3560         __be32 *p;
3561         char *kaddr;
3562         int status;
3563
3564         status = decode_op_hdr(xdr, OP_READLINK);
3565         if (status)
3566                 return status;
3567
3568         /* Convert length of symlink */
3569         READ_BUF(4);
3570         READ32(len);
3571         if (len >= rcvbuf->page_len || len <= 0) {
3572                 dprintk("nfs: server returned giant symlink!\n");
3573                 return -ENAMETOOLONG;
3574         }
3575         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3576         recvd = req->rq_rcv_buf.len - hdrlen;
3577         if (recvd < len) {
3578                 dprintk("NFS: server cheating in readlink reply: "
3579                                 "count %u > recvd %u\n", len, recvd);
3580                 return -EIO;
3581         }
3582         xdr_read_pages(xdr, len);
3583         /*
3584          * The XDR encode routine has set things up so that
3585          * the link text will be copied directly into the
3586          * buffer.  We just have to do overflow-checking,
3587          * and and null-terminate the text (the VFS expects
3588          * null-termination).
3589          */
3590         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3591         kaddr[len+rcvbuf->page_base] = '\0';
3592         kunmap_atomic(kaddr, KM_USER0);
3593         return 0;
3594 }
3595
3596 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3597 {
3598         int status;
3599
3600         status = decode_op_hdr(xdr, OP_REMOVE);
3601         if (status)
3602                 goto out;
3603         status = decode_change_info(xdr, cinfo);
3604 out:
3605         return status;
3606 }
3607
3608 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3609               struct nfs4_change_info *new_cinfo)
3610 {
3611         int status;
3612
3613         status = decode_op_hdr(xdr, OP_RENAME);
3614         if (status)
3615                 goto out;
3616         if ((status = decode_change_info(xdr, old_cinfo)))
3617                 goto out;
3618         status = decode_change_info(xdr, new_cinfo);
3619 out:
3620         return status;
3621 }
3622
3623 static int decode_renew(struct xdr_stream *xdr)
3624 {
3625         return decode_op_hdr(xdr, OP_RENEW);
3626 }
3627
3628 static int
3629 decode_restorefh(struct xdr_stream *xdr)
3630 {
3631         return decode_op_hdr(xdr, OP_RESTOREFH);
3632 }
3633
3634 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3635                 size_t *acl_len)
3636 {
3637         __be32 *savep;
3638         uint32_t attrlen,
3639                  bitmap[2] = {0};
3640         struct kvec *iov = req->rq_rcv_buf.head;
3641         int status;
3642
3643         *acl_len = 0;
3644         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3645                 goto out;
3646         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3647                 goto out;
3648         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3649                 goto out;
3650
3651         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3652                 return -EIO;
3653         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3654                 size_t hdrlen;
3655                 u32 recvd;
3656
3657                 /* We ignore &savep and don't do consistency checks on
3658                  * the attr length.  Let userspace figure it out.... */
3659                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3660                 recvd = req->rq_rcv_buf.len - hdrlen;
3661                 if (attrlen > recvd) {
3662                         dprintk("NFS: server cheating in getattr"
3663                                         " acl reply: attrlen %u > recvd %u\n",
3664                                         attrlen, recvd);
3665                         return -EINVAL;
3666                 }
3667                 xdr_read_pages(xdr, attrlen);
3668                 *acl_len = attrlen;
3669         } else
3670                 status = -EOPNOTSUPP;
3671
3672 out:
3673         return status;
3674 }
3675
3676 static int
3677 decode_savefh(struct xdr_stream *xdr)
3678 {
3679         return decode_op_hdr(xdr, OP_SAVEFH);
3680 }
3681
3682 static int decode_setattr(struct xdr_stream *xdr, struct nfs_setattrres *res)
3683 {
3684         __be32 *p;
3685         uint32_t bmlen;
3686         int status;
3687
3688
3689         status = decode_op_hdr(xdr, OP_SETATTR);
3690         if (status)
3691                 return status;
3692         READ_BUF(4);
3693         READ32(bmlen);
3694         READ_BUF(bmlen << 2);
3695         return 0;
3696 }
3697
3698 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3699 {
3700         __be32 *p;
3701         uint32_t opnum;
3702         int32_t nfserr;
3703
3704         READ_BUF(8);
3705         READ32(opnum);
3706         if (opnum != OP_SETCLIENTID) {
3707                 dprintk("nfs: decode_setclientid: Server returned operation"
3708                                 " %d\n", opnum);
3709                 return -EIO;
3710         }
3711         READ32(nfserr);
3712         if (nfserr == NFS_OK) {
3713                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3714                 READ64(clp->cl_clientid);
3715                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3716         } else if (nfserr == NFSERR_CLID_INUSE) {
3717                 uint32_t len;
3718
3719                 /* skip netid string */
3720                 READ_BUF(4);
3721                 READ32(len);
3722                 READ_BUF(len);
3723
3724                 /* skip uaddr string */
3725                 READ_BUF(4);
3726                 READ32(len);
3727                 READ_BUF(len);
3728                 return -NFSERR_CLID_INUSE;
3729         } else
3730                 return -nfs4_stat_to_errno(nfserr);
3731
3732         return 0;
3733 }
3734
3735 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3736 {
3737         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3738 }
3739
3740 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3741 {
3742         __be32 *p;
3743         int status;
3744
3745         status = decode_op_hdr(xdr, OP_WRITE);
3746         if (status)
3747                 return status;
3748
3749         READ_BUF(16);
3750         READ32(res->count);
3751         READ32(res->verf->committed);
3752         COPYMEM(res->verf->verifier, 8);
3753         return 0;
3754 }
3755
3756 static int decode_delegreturn(struct xdr_stream *xdr)
3757 {
3758         return decode_op_hdr(xdr, OP_DELEGRETURN);
3759 }
3760
3761 /*
3762  * Decode OPEN_DOWNGRADE response
3763  */
3764 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
3765 {
3766         struct xdr_stream xdr;
3767         struct compound_hdr hdr;
3768         int status;
3769
3770         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3771         status = decode_compound_hdr(&xdr, &hdr);
3772         if (status)
3773                 goto out;
3774         status = decode_putfh(&xdr);
3775         if (status)
3776                 goto out;
3777         status = decode_open_downgrade(&xdr, res);
3778         if (status != 0)
3779                 goto out;
3780         decode_getfattr(&xdr, res->fattr, res->server);
3781 out:
3782         return status;
3783 }
3784
3785 /*
3786  * END OF "GENERIC" DECODE ROUTINES.
3787  */
3788
3789 /*
3790  * Decode ACCESS response
3791  */
3792 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
3793 {
3794         struct xdr_stream xdr;
3795         struct compound_hdr hdr;
3796         int status;
3797
3798         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3799         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3800                 goto out;
3801         status = decode_putfh(&xdr);
3802         if (status != 0)
3803                 goto out;
3804         status = decode_access(&xdr, res);
3805         if (status != 0)
3806                 goto out;
3807         decode_getfattr(&xdr, res->fattr, res->server);
3808 out:
3809         return status;
3810 }
3811
3812 /*
3813  * Decode LOOKUP response
3814  */
3815 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
3816 {
3817         struct xdr_stream xdr;
3818         struct compound_hdr hdr;
3819         int status;
3820
3821         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3822         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3823                 goto out;
3824         if ((status = decode_putfh(&xdr)) != 0)
3825                 goto out;
3826         if ((status = decode_lookup(&xdr)) != 0)
3827                 goto out;
3828         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3829                 goto out;
3830         status = decode_getfattr(&xdr, res->fattr, res->server);
3831 out:
3832         return status;
3833 }
3834
3835 /*
3836  * Decode LOOKUP_ROOT response
3837  */
3838 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *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_putrootfh(&xdr)) != 0)
3848                 goto out;
3849         if ((status = decode_getfh(&xdr, res->fh)) == 0)
3850                 status = decode_getfattr(&xdr, res->fattr, res->server);
3851 out:
3852         return status;
3853 }
3854
3855 /*
3856  * Decode REMOVE response
3857  */
3858 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
3859 {
3860         struct xdr_stream xdr;
3861         struct compound_hdr hdr;
3862         int status;
3863
3864         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3865         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3866                 goto out;
3867         if ((status = decode_putfh(&xdr)) != 0)
3868                 goto out;
3869         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
3870                 goto out;
3871         decode_getfattr(&xdr, &res->dir_attr, res->server);
3872 out:
3873         return status;
3874 }
3875
3876 /*
3877  * Decode RENAME response
3878  */
3879 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
3880 {
3881         struct xdr_stream xdr;
3882         struct compound_hdr hdr;
3883         int status;
3884
3885         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3886         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3887                 goto out;
3888         if ((status = decode_putfh(&xdr)) != 0)
3889                 goto out;
3890         if ((status = decode_savefh(&xdr)) != 0)
3891                 goto out;
3892         if ((status = decode_putfh(&xdr)) != 0)
3893                 goto out;
3894         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
3895                 goto out;
3896         /* Current FH is target directory */
3897         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
3898                 goto out;
3899         if ((status = decode_restorefh(&xdr)) != 0)
3900                 goto out;
3901         decode_getfattr(&xdr, res->old_fattr, res->server);
3902 out:
3903         return status;
3904 }
3905
3906 /*
3907  * Decode LINK response
3908  */
3909 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
3910 {
3911         struct xdr_stream xdr;
3912         struct compound_hdr hdr;
3913         int status;
3914
3915         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3916         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3917                 goto out;
3918         if ((status = decode_putfh(&xdr)) != 0)
3919                 goto out;
3920         if ((status = decode_savefh(&xdr)) != 0)
3921                 goto out;
3922         if ((status = decode_putfh(&xdr)) != 0)
3923                 goto out;
3924         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
3925                 goto out;
3926         /*
3927          * Note order: OP_LINK leaves the directory as the current
3928          *             filehandle.
3929          */
3930         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
3931                 goto out;
3932         if ((status = decode_restorefh(&xdr)) != 0)
3933                 goto out;
3934         decode_getfattr(&xdr, res->fattr, res->server);
3935 out:
3936         return status;
3937 }
3938
3939 /*
3940  * Decode CREATE response
3941  */
3942 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3943 {
3944         struct xdr_stream xdr;
3945         struct compound_hdr hdr;
3946         int status;
3947
3948         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3949         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
3950                 goto out;
3951         if ((status = decode_putfh(&xdr)) != 0)
3952                 goto out;
3953         if ((status = decode_savefh(&xdr)) != 0)
3954                 goto out;
3955         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
3956                 goto out;
3957         if ((status = decode_getfh(&xdr, res->fh)) != 0)
3958                 goto out;
3959         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
3960                 goto out;
3961         if ((status = decode_restorefh(&xdr)) != 0)
3962                 goto out;
3963         decode_getfattr(&xdr, res->dir_fattr, res->server);
3964 out:
3965         return status;
3966 }
3967
3968 /*
3969  * Decode SYMLINK response
3970  */
3971 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
3972 {
3973         return nfs4_xdr_dec_create(rqstp, p, res);
3974 }
3975
3976 /*
3977  * Decode GETATTR response
3978  */
3979 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
3980 {
3981         struct xdr_stream xdr;
3982         struct compound_hdr hdr;
3983         int status;
3984
3985         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
3986         status = decode_compound_hdr(&xdr, &hdr);
3987         if (status)
3988                 goto out;
3989         status = decode_putfh(&xdr);
3990         if (status)
3991                 goto out;
3992         status = decode_getfattr(&xdr, res->fattr, res->server);
3993 out:
3994         return status;
3995
3996 }
3997
3998 /*
3999  * Encode an SETACL request
4000  */
4001 static int
4002 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4003 {
4004         struct xdr_stream xdr;
4005         struct compound_hdr hdr = {
4006                 .nops   = 2,
4007         };
4008         int status;
4009
4010         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4011         encode_compound_hdr(&xdr, &hdr);
4012         status = encode_putfh(&xdr, args->fh);
4013         if (status)
4014                 goto out;
4015         status = encode_setacl(&xdr, args);
4016 out:
4017         return status;
4018 }
4019 /*
4020  * Decode SETACL response
4021  */
4022 static int
4023 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, void *res)
4024 {
4025         struct xdr_stream xdr;
4026         struct compound_hdr hdr;
4027         int status;
4028
4029         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4030         status = decode_compound_hdr(&xdr, &hdr);
4031         if (status)
4032                 goto out;
4033         status = decode_putfh(&xdr);
4034         if (status)
4035                 goto out;
4036         status = decode_setattr(&xdr, res);
4037 out:
4038         return status;
4039 }
4040
4041 /*
4042  * Decode GETACL response
4043  */
4044 static int
4045 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, size_t *acl_len)
4046 {
4047         struct xdr_stream xdr;
4048         struct compound_hdr hdr;
4049         int status;
4050
4051         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4052         status = decode_compound_hdr(&xdr, &hdr);
4053         if (status)
4054                 goto out;
4055         status = decode_putfh(&xdr);
4056         if (status)
4057                 goto out;
4058         status = decode_getacl(&xdr, rqstp, acl_len);
4059
4060 out:
4061         return status;
4062 }
4063
4064 /*
4065  * Decode CLOSE response
4066  */
4067 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4068 {
4069         struct xdr_stream xdr;
4070         struct compound_hdr hdr;
4071         int status;
4072
4073         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4074         status = decode_compound_hdr(&xdr, &hdr);
4075         if (status)
4076                 goto out;
4077         status = decode_putfh(&xdr);
4078         if (status)
4079                 goto out;
4080         status = decode_close(&xdr, res);
4081         if (status != 0)
4082                 goto out;
4083         /*
4084          * Note: Server may do delete on close for this file
4085          *      in which case the getattr call will fail with
4086          *      an ESTALE error. Shouldn't be a problem,
4087          *      though, since fattr->valid will remain unset.
4088          */
4089         decode_getfattr(&xdr, res->fattr, res->server);
4090 out:
4091         return status;
4092 }
4093
4094 /*
4095  * Decode OPEN response
4096  */
4097 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4098 {
4099         struct xdr_stream xdr;
4100         struct compound_hdr hdr;
4101         int status;
4102
4103         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4104         status = decode_compound_hdr(&xdr, &hdr);
4105         if (status)
4106                 goto out;
4107         status = decode_putfh(&xdr);
4108         if (status)
4109                 goto out;
4110         status = decode_savefh(&xdr);
4111         if (status)
4112                 goto out;
4113         status = decode_open(&xdr, res);
4114         if (status)
4115                 goto out;
4116         if (decode_getfh(&xdr, &res->fh) != 0)
4117                 goto out;
4118         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4119                 goto out;
4120         if (decode_restorefh(&xdr) != 0)
4121                 goto out;
4122         decode_getfattr(&xdr, res->dir_attr, res->server);
4123 out:
4124         return status;
4125 }
4126
4127 /*
4128  * Decode OPEN_CONFIRM response
4129  */
4130 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4131 {
4132         struct xdr_stream xdr;
4133         struct compound_hdr hdr;
4134         int status;
4135
4136         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4137         status = decode_compound_hdr(&xdr, &hdr);
4138         if (status)
4139                 goto out;
4140         status = decode_putfh(&xdr);
4141         if (status)
4142                 goto out;
4143         status = decode_open_confirm(&xdr, res);
4144 out:
4145         return status;
4146 }
4147
4148 /*
4149  * Decode OPEN response
4150  */
4151 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4152 {
4153         struct xdr_stream xdr;
4154         struct compound_hdr hdr;
4155         int status;
4156
4157         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4158         status = decode_compound_hdr(&xdr, &hdr);
4159         if (status)
4160                 goto out;
4161         status = decode_putfh(&xdr);
4162         if (status)
4163                 goto out;
4164         status = decode_open(&xdr, res);
4165         if (status)
4166                 goto out;
4167         decode_getfattr(&xdr, res->f_attr, res->server);
4168 out:
4169         return status;
4170 }
4171
4172 /*
4173  * Decode SETATTR response
4174  */
4175 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4176 {
4177         struct xdr_stream xdr;
4178         struct compound_hdr hdr;
4179         int status;
4180
4181         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4182         status = decode_compound_hdr(&xdr, &hdr);
4183         if (status)
4184                 goto out;
4185         status = decode_putfh(&xdr);
4186         if (status)
4187                 goto out;
4188         status = decode_setattr(&xdr, res);
4189         if (status)
4190                 goto out;
4191         status = decode_getfattr(&xdr, res->fattr, res->server);
4192         if (status == NFS4ERR_DELAY)
4193                 status = 0;
4194 out:
4195         return status;
4196 }
4197
4198 /*
4199  * Decode LOCK response
4200  */
4201 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4202 {
4203         struct xdr_stream xdr;
4204         struct compound_hdr hdr;
4205         int status;
4206
4207         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4208         status = decode_compound_hdr(&xdr, &hdr);
4209         if (status)
4210                 goto out;
4211         status = decode_putfh(&xdr);
4212         if (status)
4213                 goto out;
4214         status = decode_lock(&xdr, res);
4215 out:
4216         return status;
4217 }
4218
4219 /*
4220  * Decode LOCKT response
4221  */
4222 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4223 {
4224         struct xdr_stream xdr;
4225         struct compound_hdr hdr;
4226         int status;
4227
4228         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4229         status = decode_compound_hdr(&xdr, &hdr);
4230         if (status)
4231                 goto out;
4232         status = decode_putfh(&xdr);
4233         if (status)
4234                 goto out;
4235         status = decode_lockt(&xdr, res);
4236 out:
4237         return status;
4238 }
4239
4240 /*
4241  * Decode LOCKU response
4242  */
4243 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4244 {
4245         struct xdr_stream xdr;
4246         struct compound_hdr hdr;
4247         int status;
4248
4249         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4250         status = decode_compound_hdr(&xdr, &hdr);
4251         if (status)
4252                 goto out;
4253         status = decode_putfh(&xdr);
4254         if (status)
4255                 goto out;
4256         status = decode_locku(&xdr, res);
4257 out:
4258         return status;
4259 }
4260
4261 /*
4262  * Decode READLINK response
4263  */
4264 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, void *res)
4265 {
4266         struct xdr_stream xdr;
4267         struct compound_hdr hdr;
4268         int status;
4269
4270         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4271         status = decode_compound_hdr(&xdr, &hdr);
4272         if (status)
4273                 goto out;
4274         status = decode_putfh(&xdr);
4275         if (status)
4276                 goto out;
4277         status = decode_readlink(&xdr, rqstp);
4278 out:
4279         return status;
4280 }
4281
4282 /*
4283  * Decode READDIR response
4284  */
4285 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4286 {
4287         struct xdr_stream xdr;
4288         struct compound_hdr hdr;
4289         int status;
4290
4291         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4292         status = decode_compound_hdr(&xdr, &hdr);
4293         if (status)
4294                 goto out;
4295         status = decode_putfh(&xdr);
4296         if (status)
4297                 goto out;
4298         status = decode_readdir(&xdr, rqstp, res);
4299 out:
4300         return status;
4301 }
4302
4303 /*
4304  * Decode Read response
4305  */
4306 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4307 {
4308         struct xdr_stream xdr;
4309         struct compound_hdr hdr;
4310         int status;
4311
4312         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4313         status = decode_compound_hdr(&xdr, &hdr);
4314         if (status)
4315                 goto out;
4316         status = decode_putfh(&xdr);
4317         if (status)
4318                 goto out;
4319         status = decode_read(&xdr, rqstp, res);
4320         if (!status)
4321                 status = res->count;
4322 out:
4323         return status;
4324 }
4325
4326 /*
4327  * Decode WRITE response
4328  */
4329 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4330 {
4331         struct xdr_stream xdr;
4332         struct compound_hdr hdr;
4333         int status;
4334
4335         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4336         status = decode_compound_hdr(&xdr, &hdr);
4337         if (status)
4338                 goto out;
4339         status = decode_putfh(&xdr);
4340         if (status)
4341                 goto out;
4342         status = decode_write(&xdr, res);
4343         if (status)
4344                 goto out;
4345         decode_getfattr(&xdr, res->fattr, res->server);
4346         if (!status)
4347                 status = res->count;
4348 out:
4349         return status;
4350 }
4351
4352 /*
4353  * Decode COMMIT response
4354  */
4355 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4356 {
4357         struct xdr_stream xdr;
4358         struct compound_hdr hdr;
4359         int status;
4360
4361         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4362         status = decode_compound_hdr(&xdr, &hdr);
4363         if (status)
4364                 goto out;
4365         status = decode_putfh(&xdr);
4366         if (status)
4367                 goto out;
4368         status = decode_commit(&xdr, res);
4369         if (status)
4370                 goto out;
4371         decode_getfattr(&xdr, res->fattr, res->server);
4372 out:
4373         return status;
4374 }
4375
4376 /*
4377  * FSINFO request
4378  */
4379 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
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_fsinfo(&xdr, fsinfo);
4391         if (!status)
4392                 status = -nfs4_stat_to_errno(hdr.status);
4393         return status;
4394 }
4395
4396 /*
4397  * PATHCONF request
4398  */
4399 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *pathconf)
4400 {
4401         struct xdr_stream xdr;
4402         struct compound_hdr hdr;
4403         int status;
4404
4405         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4406         status = decode_compound_hdr(&xdr, &hdr);
4407         if (!status)
4408                 status = decode_putfh(&xdr);
4409         if (!status)
4410                 status = decode_pathconf(&xdr, pathconf);
4411         return status;
4412 }
4413
4414 /*
4415  * STATFS request
4416  */
4417 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *fsstat)
4418 {
4419         struct xdr_stream xdr;
4420         struct compound_hdr hdr;
4421         int status;
4422
4423         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4424         status = decode_compound_hdr(&xdr, &hdr);
4425         if (!status)
4426                 status = decode_putfh(&xdr);
4427         if (!status)
4428                 status = decode_statfs(&xdr, fsstat);
4429         return status;
4430 }
4431
4432 /*
4433  * GETATTR_BITMAP request
4434  */
4435 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4436 {
4437         struct xdr_stream xdr;
4438         struct compound_hdr hdr;
4439         int status;
4440
4441         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4442         if ((status = decode_compound_hdr(&xdr, &hdr)) != 0)
4443                 goto out;
4444         if ((status = decode_putfh(&xdr)) != 0)
4445                 goto out;
4446         status = decode_server_caps(&xdr, res);
4447 out:
4448         return status;
4449 }
4450
4451 /*
4452  * Decode RENEW response
4453  */
4454 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4455 {
4456         struct xdr_stream xdr;
4457         struct compound_hdr hdr;
4458         int status;
4459
4460         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4461         status = decode_compound_hdr(&xdr, &hdr);
4462         if (!status)
4463                 status = decode_renew(&xdr);
4464         return status;
4465 }
4466
4467 /*
4468  * a SETCLIENTID request
4469  */
4470 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4471                 struct nfs_client *clp)
4472 {
4473         struct xdr_stream xdr;
4474         struct compound_hdr hdr;
4475         int status;
4476
4477         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4478         status = decode_compound_hdr(&xdr, &hdr);
4479         if (!status)
4480                 status = decode_setclientid(&xdr, clp);
4481         if (!status)
4482                 status = -nfs4_stat_to_errno(hdr.status);
4483         return status;
4484 }
4485
4486 /*
4487  * a SETCLIENTID_CONFIRM request
4488  */
4489 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4490 {
4491         struct xdr_stream xdr;
4492         struct compound_hdr hdr;
4493         int status;
4494
4495         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4496         status = decode_compound_hdr(&xdr, &hdr);
4497         if (!status)
4498                 status = decode_setclientid_confirm(&xdr);
4499         if (!status)
4500                 status = decode_putrootfh(&xdr);
4501         if (!status)
4502                 status = decode_fsinfo(&xdr, fsinfo);
4503         if (!status)
4504                 status = -nfs4_stat_to_errno(hdr.status);
4505         return status;
4506 }
4507
4508 /*
4509  * DELEGRETURN request
4510  */
4511 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4512 {
4513         struct xdr_stream xdr;
4514         struct compound_hdr hdr;
4515         int status;
4516
4517         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4518         status = decode_compound_hdr(&xdr, &hdr);
4519         if (status != 0)
4520                 goto out;
4521         status = decode_putfh(&xdr);
4522         if (status != 0)
4523                 goto out;
4524         status = decode_delegreturn(&xdr);
4525         decode_getfattr(&xdr, res->fattr, res->server);
4526 out:
4527         return status;
4528 }
4529
4530 /*
4531  * FS_LOCATIONS request
4532  */
4533 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations *res)
4534 {
4535         struct xdr_stream xdr;
4536         struct compound_hdr hdr;
4537         int status;
4538
4539         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4540         status = decode_compound_hdr(&xdr, &hdr);
4541         if (status != 0)
4542                 goto out;
4543         if ((status = decode_putfh(&xdr)) != 0)
4544                 goto out;
4545         if ((status = decode_lookup(&xdr)) != 0)
4546                 goto out;
4547         xdr_enter_page(&xdr, PAGE_SIZE);
4548         status = decode_getfattr(&xdr, &res->fattr, res->server);
4549 out:
4550         return status;
4551 }
4552
4553 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4554 {
4555         uint32_t bitmap[2] = {0};
4556         uint32_t len;
4557
4558         if (!*p++) {
4559                 if (!*p)
4560                         return ERR_PTR(-EAGAIN);
4561                 entry->eof = 1;
4562                 return ERR_PTR(-EBADCOOKIE);
4563         }
4564
4565         entry->prev_cookie = entry->cookie;
4566         p = xdr_decode_hyper(p, &entry->cookie);
4567         entry->len = ntohl(*p++);
4568         entry->name = (const char *) p;
4569         p += XDR_QUADLEN(entry->len);
4570
4571         /*
4572          * In case the server doesn't return an inode number,
4573          * we fake one here.  (We don't use inode number 0,
4574          * since glibc seems to choke on it...)
4575          */
4576         entry->ino = 1;
4577
4578         len = ntohl(*p++);              /* bitmap length */
4579         if (len-- > 0) {
4580                 bitmap[0] = ntohl(*p++);
4581                 if (len-- > 0) {
4582                         bitmap[1] = ntohl(*p++);
4583                         p += len;
4584                 }
4585         }
4586         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4587         if (len > 0) {
4588                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4589                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4590                         /* Ignore the return value of rdattr_error for now */
4591                         p++;
4592                         len--;
4593                 }
4594                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4595                         xdr_decode_hyper(p, &entry->ino);
4596                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4597                         xdr_decode_hyper(p, &entry->ino);
4598                 p += len;
4599         }
4600
4601         entry->eof = !p[0] && p[1];
4602         return p;
4603 }
4604
4605 /*
4606  * We need to translate between nfs status return values and
4607  * the local errno values which may not be the same.
4608  */
4609 static struct {
4610         int stat;
4611         int errno;
4612 } nfs_errtbl[] = {
4613         { NFS4_OK,              0               },
4614         { NFS4ERR_PERM,         EPERM           },
4615         { NFS4ERR_NOENT,        ENOENT          },
4616         { NFS4ERR_IO,           errno_NFSERR_IO },
4617         { NFS4ERR_NXIO,         ENXIO           },
4618         { NFS4ERR_ACCESS,       EACCES          },
4619         { NFS4ERR_EXIST,        EEXIST          },
4620         { NFS4ERR_XDEV,         EXDEV           },
4621         { NFS4ERR_NOTDIR,       ENOTDIR         },
4622         { NFS4ERR_ISDIR,        EISDIR          },
4623         { NFS4ERR_INVAL,        EINVAL          },
4624         { NFS4ERR_FBIG,         EFBIG           },
4625         { NFS4ERR_NOSPC,        ENOSPC          },
4626         { NFS4ERR_ROFS,         EROFS           },
4627         { NFS4ERR_MLINK,        EMLINK          },
4628         { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
4629         { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
4630         { NFS4ERR_DQUOT,        EDQUOT          },
4631         { NFS4ERR_STALE,        ESTALE          },
4632         { NFS4ERR_BADHANDLE,    EBADHANDLE      },
4633         { NFS4ERR_BADOWNER,     EINVAL          },
4634         { NFS4ERR_BADNAME,      EINVAL          },
4635         { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
4636         { NFS4ERR_NOTSUPP,      ENOTSUPP        },
4637         { NFS4ERR_TOOSMALL,     ETOOSMALL       },
4638         { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
4639         { NFS4ERR_BADTYPE,      EBADTYPE        },
4640         { NFS4ERR_LOCKED,       EAGAIN          },
4641         { NFS4ERR_RESOURCE,     EREMOTEIO       },
4642         { NFS4ERR_SYMLINK,      ELOOP           },
4643         { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
4644         { NFS4ERR_DEADLOCK,     EDEADLK         },
4645         { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
4646                                                     * to be handled by a
4647                                                     * middle-layer.
4648                                                     */
4649         { -1,                   EIO             }
4650 };
4651
4652 /*
4653  * Convert an NFS error code to a local one.
4654  * This one is used jointly by NFSv2 and NFSv3.
4655  */
4656 static int
4657 nfs4_stat_to_errno(int stat)
4658 {
4659         int i;
4660         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
4661                 if (nfs_errtbl[i].stat == stat)
4662                         return nfs_errtbl[i].errno;
4663         }
4664         if (stat <= 10000 || stat > 10100) {
4665                 /* The server is looney tunes. */
4666                 return ESERVERFAULT;
4667         }
4668         /* If we cannot translate the error, the recovery routines should
4669          * handle it.
4670          * Note: remaining NFSv4 error codes have values > 10000, so should
4671          * not conflict with native Linux error codes.
4672          */
4673         return stat;
4674 }
4675
4676 #define PROC(proc, argtype, restype)                            \
4677 [NFSPROC4_CLNT_##proc] = {                                      \
4678         .p_proc   = NFSPROC4_COMPOUND,                          \
4679         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
4680         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
4681         .p_arglen = NFS4_##argtype##_sz,                        \
4682         .p_replen = NFS4_##restype##_sz,                        \
4683         .p_statidx = NFSPROC4_CLNT_##proc,                      \
4684         .p_name   = #proc,                                      \
4685     }
4686
4687 struct rpc_procinfo     nfs4_procedures[] = {
4688   PROC(READ,            enc_read,       dec_read),
4689   PROC(WRITE,           enc_write,      dec_write),
4690   PROC(COMMIT,          enc_commit,     dec_commit),
4691   PROC(OPEN,            enc_open,       dec_open),
4692   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
4693   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
4694   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
4695   PROC(CLOSE,           enc_close,      dec_close),
4696   PROC(SETATTR,         enc_setattr,    dec_setattr),
4697   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
4698   PROC(RENEW,           enc_renew,      dec_renew),
4699   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
4700   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
4701   PROC(LOCK,            enc_lock,       dec_lock),
4702   PROC(LOCKT,           enc_lockt,      dec_lockt),
4703   PROC(LOCKU,           enc_locku,      dec_locku),
4704   PROC(ACCESS,          enc_access,     dec_access),
4705   PROC(GETATTR,         enc_getattr,    dec_getattr),
4706   PROC(LOOKUP,          enc_lookup,     dec_lookup),
4707   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
4708   PROC(REMOVE,          enc_remove,     dec_remove),
4709   PROC(RENAME,          enc_rename,     dec_rename),
4710   PROC(LINK,            enc_link,       dec_link),
4711   PROC(SYMLINK,         enc_symlink,    dec_symlink),
4712   PROC(CREATE,          enc_create,     dec_create),
4713   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
4714   PROC(STATFS,          enc_statfs,     dec_statfs),
4715   PROC(READLINK,        enc_readlink,   dec_readlink),
4716   PROC(READDIR,         enc_readdir,    dec_readdir),
4717   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
4718   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
4719   PROC(GETACL,          enc_getacl,     dec_getacl),
4720   PROC(SETACL,          enc_setacl,     dec_setacl),
4721   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
4722 };
4723
4724 struct rpc_version              nfs_version4 = {
4725         .number                 = 4,
4726         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
4727         .procs                  = nfs4_procedures
4728 };
4729
4730 /*
4731  * Local variables:
4732  *  c-basic-offset: 8
4733  * End:
4734  */