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     (encode_getattr_maxsz)
 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 decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 250
 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 252                                 encode_verifier_maxsz + \
 253                                 1 /* co_ownerid.len */ + \
 254                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 255                                 1 /* flags */ + \
 256                                 1 /* spa_how */ + \
 257                                 0 /* SP4_NONE (for now) */ + \
 258                                 1 /* zero implemetation id array */)
 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 260                                 2 /* eir_clientid */ + \
 261                                 1 /* eir_sequenceid */ + \
 262                                 1 /* eir_flags */ + \
 263                                 1 /* spr_how */ + \
 264                                 0 /* SP4_NONE (for now) */ + \
 265                                 2 /* eir_server_owner.so_minor_id */ + \
 266                                 /* eir_server_owner.so_major_id<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 /* eir_server_scope<> */ \
 269                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 270                                 1 /* eir_server_impl_id array length */ + \
 271                                 0 /* ignored eir_server_impl_id contents */)
 272 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 273 #define decode_channel_attrs_maxsz  (6 + \
 274                                      1 /* ca_rdma_ird.len */ + \
 275                                      1 /* ca_rdma_ird */)
 276 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 277                                      2 /* csa_clientid */ + \
 278                                      1 /* csa_sequence */ + \
 279                                      1 /* csa_flags */ + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      1 /* csa_cb_program */ + \
 283                                      1 /* csa_sec_parms.len (1) */ + \
 284                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 285                                      1 /* stamp */ + \
 286                                      1 /* machinename.len */ + \
 287                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 288                                      1 /* uid */ + \
 289                                      1 /* gid */ + \
 290                                      1 /* gids.len (0) */)
 291 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 292                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 293                                      1 /* csr_sequence */ + \
 294                                      1 /* csr_flags */ + \
 295                                      decode_channel_attrs_maxsz + \
 296                                      decode_channel_attrs_maxsz)
 297 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 298 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 299 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 300                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 301 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 302                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 303 #else /* CONFIG_NFS_V4_1 */
 304 #define encode_sequence_maxsz   0
 305 #define decode_sequence_maxsz   0
 306 #endif /* CONFIG_NFS_V4_1 */
 307
 308 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 310 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 311                                 encode_sequence_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_read_maxsz)
 314 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 315                                 decode_sequence_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 decode_read_maxsz)
 318 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 319                                 encode_sequence_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_readlink_maxsz)
 322 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 323                                 decode_sequence_maxsz + \
 324                                 decode_putfh_maxsz + \
 325                                 decode_readlink_maxsz)
 326 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 327                                 encode_sequence_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_readdir_maxsz)
 330 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 331                                 decode_sequence_maxsz + \
 332                                 decode_putfh_maxsz + \
 333                                 decode_readdir_maxsz)
 334 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_write_maxsz + \
 338                                 encode_getattr_maxsz)
 339 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 340                                 decode_sequence_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_write_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_commit_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_commit_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_savefh_maxsz + \
 358                                 encode_open_maxsz + \
 359                                 encode_getfh_maxsz + \
 360                                 encode_getattr_maxsz + \
 361                                 encode_restorefh_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_savefh_maxsz + \
 367                                 decode_open_maxsz + \
 368                                 decode_getfh_maxsz + \
 369                                 decode_getattr_maxsz + \
 370                                 decode_restorefh_maxsz + \
 371                                 decode_getattr_maxsz)
 372 #define NFS4_enc_open_confirm_sz \
 373                                 (compound_encode_hdr_maxsz + \
 374                                  encode_putfh_maxsz + \
 375                                  encode_open_confirm_maxsz)
 376 #define NFS4_dec_open_confirm_sz \
 377                                 (compound_decode_hdr_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_open_confirm_maxsz)
 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 381                                         encode_sequence_maxsz + \
 382                                         encode_putfh_maxsz + \
 383                                         encode_open_maxsz + \
 384                                         encode_getattr_maxsz)
 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 386                                         decode_sequence_maxsz + \
 387                                         decode_putfh_maxsz + \
 388                                         decode_open_maxsz + \
 389                                         decode_getattr_maxsz)
 390 #define NFS4_enc_open_downgrade_sz \
 391                                 (compound_encode_hdr_maxsz + \
 392                                  encode_sequence_maxsz + \
 393                                  encode_putfh_maxsz + \
 394                                  encode_open_downgrade_maxsz + \
 395                                  encode_getattr_maxsz)
 396 #define NFS4_dec_open_downgrade_sz \
 397                                 (compound_decode_hdr_maxsz + \
 398                                  decode_sequence_maxsz + \
 399                                  decode_putfh_maxsz + \
 400                                  decode_open_downgrade_maxsz + \
 401                                  decode_getattr_maxsz)
 402 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 403                                  encode_sequence_maxsz + \
 404                                  encode_putfh_maxsz + \
 405                                  encode_close_maxsz + \
 406                                  encode_getattr_maxsz)
 407 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_close_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_setattr_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_setattr_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_fsinfo_maxsz)
 426 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_fsinfo_maxsz)
 430 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 431                                 encode_renew_maxsz)
 432 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 433                                 decode_renew_maxsz)
 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 435                                 encode_setclientid_maxsz)
 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 437                                 decode_setclientid_maxsz)
 438 #define NFS4_enc_setclientid_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                 encode_setclientid_confirm_maxsz + \
 441                                 encode_putrootfh_maxsz + \
 442                                 encode_fsinfo_maxsz)
 443 #define NFS4_dec_setclientid_confirm_sz \
 444                                 (compound_decode_hdr_maxsz + \
 445                                 decode_setclientid_confirm_maxsz + \
 446                                 decode_putrootfh_maxsz + \
 447                                 decode_fsinfo_maxsz)
 448 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_lock_maxsz)
 452 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_lock_maxsz)
 456 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_lockt_maxsz)
 460 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_lockt_maxsz)
 464 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_locku_maxsz)
 468 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_locku_maxsz)
 472 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_access_maxsz + \
 476                                 encode_getattr_maxsz)
 477 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getattr_maxsz)
 482 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_getattr_maxsz)
 490 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_lookup_maxsz + \
 494                                 encode_getattr_maxsz + \
 495                                 encode_getfh_maxsz)
 496 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 497                                 decode_sequence_maxsz + \
 498                                 decode_putfh_maxsz + \
 499                                 decode_lookup_maxsz + \
 500                                 decode_getattr_maxsz + \
 501                                 decode_getfh_maxsz)
 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putrootfh_maxsz + \
 505                                 encode_getattr_maxsz + \
 506                                 encode_getfh_maxsz)
 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putrootfh_maxsz + \
 510                                 decode_getattr_maxsz + \
 511                                 decode_getfh_maxsz)
 512 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_remove_maxsz + \
 516                                 encode_getattr_maxsz)
 517 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 518                                 decode_sequence_maxsz + \
 519                                 decode_putfh_maxsz + \
 520                                 decode_remove_maxsz + \
 521                                 decode_getattr_maxsz)
 522 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_savefh_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_rename_maxsz + \
 528                                 encode_getattr_maxsz + \
 529                                 encode_restorefh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_savefh_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_rename_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_restorefh_maxsz + \
 539                                 decode_getattr_maxsz)
 540 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 541                                 encode_sequence_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_savefh_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_link_maxsz + \
 546                                 decode_getattr_maxsz + \
 547                                 encode_restorefh_maxsz + \
 548                                 decode_getattr_maxsz)
 549 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_savefh_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_link_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_restorefh_maxsz + \
 557                                 decode_getattr_maxsz)
 558 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_symlink_maxsz + \
 562                                 encode_getattr_maxsz + \
 563                                 encode_getfh_maxsz)
 564 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 565                                 decode_sequence_maxsz + \
 566                                 decode_putfh_maxsz + \
 567                                 decode_symlink_maxsz + \
 568                                 decode_getattr_maxsz + \
 569                                 decode_getfh_maxsz)
 570 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_create_maxsz + \
 575                                 encode_getfh_maxsz + \
 576                                 encode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 encode_getattr_maxsz)
 579 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_create_maxsz + \
 584                                 decode_getfh_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_statfs_maxsz)
 600 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_statfs_maxsz)
 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_delegreturn_maxsz + \
 616                                 encode_getattr_maxsz)
 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_delegreturn_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_getacl_maxsz)
 625 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_getacl_maxsz)
 629 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_setacl_maxsz)
 633 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_setacl_maxsz)
 637 #define NFS4_enc_fs_locations_sz \
 638                                 (compound_encode_hdr_maxsz + \
 639                                  encode_sequence_maxsz + \
 640                                  encode_putfh_maxsz + \
 641                                  encode_lookup_maxsz + \
 642                                  encode_fs_locations_maxsz)
 643 #define NFS4_dec_fs_locations_sz \
 644                                 (compound_decode_hdr_maxsz + \
 645                                  decode_sequence_maxsz + \
 646                                  decode_putfh_maxsz + \
 647                                  decode_lookup_maxsz + \
 648                                  decode_fs_locations_maxsz)
 649 #if defined(CONFIG_NFS_V4_1)
 650 #define NFS4_enc_exchange_id_sz \
 651                                 (compound_encode_hdr_maxsz + \
 652                                  encode_exchange_id_maxsz)
 653 #define NFS4_dec_exchange_id_sz \
 654                                 (compound_decode_hdr_maxsz + \
 655                                  decode_exchange_id_maxsz)
 656 #define NFS4_enc_create_session_sz \
 657                                 (compound_encode_hdr_maxsz + \
 658                                  encode_create_session_maxsz)
 659 #define NFS4_dec_create_session_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_create_session_maxsz)
 662 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 663                                          encode_destroy_session_maxsz)
 664 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 665                                          decode_destroy_session_maxsz)
 666 #define NFS4_enc_sequence_sz \
 667                                 (compound_decode_hdr_maxsz + \
 668                                  encode_sequence_maxsz)
 669 #define NFS4_dec_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_sequence_maxsz)
 672 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 673                                          encode_sequence_maxsz + \
 674                                          encode_putrootfh_maxsz + \
 675                                          encode_fsinfo_maxsz)
 676 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 677                                          decode_sequence_maxsz + \
 678                                          decode_putrootfh_maxsz + \
 679                                          decode_fsinfo_maxsz)
 680 #endif /* CONFIG_NFS_V4_1 */
 681
 682 static const umode_t nfs_type2fmt[] = {
 683         [NF4BAD] = 0,
 684         [NF4REG] = S_IFREG,
 685         [NF4DIR] = S_IFDIR,
 686         [NF4BLK] = S_IFBLK,
 687         [NF4CHR] = S_IFCHR,
 688         [NF4LNK] = S_IFLNK,
 689         [NF4SOCK] = S_IFSOCK,
 690         [NF4FIFO] = S_IFIFO,
 691         [NF4ATTRDIR] = 0,
 692         [NF4NAMEDATTR] = 0,
 693 };
 694
 695 struct compound_hdr {
 696         int32_t         status;
 697         uint32_t        nops;
 698         __be32 *        nops_p;
 699         uint32_t        taglen;
 700         char *          tag;
 701         uint32_t        replen;         /* expected reply words */
 702         u32             minorversion;
 703 };
 704
 705 /*
 706  * START OF "GENERIC" ENCODE ROUTINES.
 707  *   These may look a little ugly since they are imported from a "generic"
 708  * set of XDR encode/decode routines which are intended to be shared by
 709  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 710  *
 711  * If the pain of reading these is too great, it should be a straightforward
 712  * task to translate them into Linux-specific versions which are more
 713  * consistent with the style used in NFSv2/v3...
 714  */
 715 #define WRITE32(n)               *p++ = htonl(n)
 716 #define WRITE64(n)               do {                           \
 717         *p++ = htonl((uint32_t)((n) >> 32));                            \
 718         *p++ = htonl((uint32_t)(n));                                    \
 719 } while (0)
 720 #define WRITEMEM(ptr,nbytes)     do {                           \
 721         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 722 } while (0)
 723
 724 #define RESERVE_SPACE(nbytes)   do {                            \
 725         p = xdr_reserve_space(xdr, nbytes);                     \
 726         BUG_ON(!p);                                             \
 727 } while (0)
 728
 729 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 730 {
 731         __be32 *p;
 732
 733         p = xdr_reserve_space(xdr, 4 + len);
 734         BUG_ON(p == NULL);
 735         xdr_encode_opaque(p, str, len);
 736 }
 737
 738 static void encode_compound_hdr(struct xdr_stream *xdr,
 739                                 struct rpc_rqst *req,
 740                                 struct compound_hdr *hdr)
 741 {
 742         __be32 *p;
 743         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 744
 745         /* initialize running count of expected bytes in reply.
 746          * NOTE: the replied tag SHOULD be the same is the one sent,
 747          * but this is not required as a MUST for the server to do so. */
 748         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 749
 750         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 751         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 752         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 753         WRITE32(hdr->taglen);
 754         WRITEMEM(hdr->tag, hdr->taglen);
 755         WRITE32(hdr->minorversion);
 756         hdr->nops_p = p;
 757         WRITE32(hdr->nops);
 758 }
 759
 760 static void encode_nops(struct compound_hdr *hdr)
 761 {
 762         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 763         *hdr->nops_p = htonl(hdr->nops);
 764 }
 765
 766 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 767 {
 768         __be32 *p;
 769
 770         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 771         BUG_ON(p == NULL);
 772         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 773 }
 774
 775 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 776 {
 777         char owner_name[IDMAP_NAMESZ];
 778         char owner_group[IDMAP_NAMESZ];
 779         int owner_namelen = 0;
 780         int owner_grouplen = 0;
 781         __be32 *p;
 782         __be32 *q;
 783         int len;
 784         uint32_t bmval0 = 0;
 785         uint32_t bmval1 = 0;
 786
 787         /*
 788          * We reserve enough space to write the entire attribute buffer at once.
 789          * In the worst-case, this would be
 790          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 791          *          = 36 bytes, plus any contribution from variable-length fields
 792          *            such as owner/group.
 793          */
 794         len = 16;
 795
 796         /* Sigh */
 797         if (iap->ia_valid & ATTR_SIZE)
 798                 len += 8;
 799         if (iap->ia_valid & ATTR_MODE)
 800                 len += 4;
 801         if (iap->ia_valid & ATTR_UID) {
 802                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 803                 if (owner_namelen < 0) {
 804                         dprintk("nfs: couldn't resolve uid %d to string\n",
 805                                         iap->ia_uid);
 806                         /* XXX */
 807                         strcpy(owner_name, "nobody");
 808                         owner_namelen = sizeof("nobody") - 1;
 809                         /* goto out; */
 810                 }
 811                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 812         }
 813         if (iap->ia_valid & ATTR_GID) {
 814                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 815                 if (owner_grouplen < 0) {
 816                         dprintk("nfs: couldn't resolve gid %d to string\n",
 817                                         iap->ia_gid);
 818                         strcpy(owner_group, "nobody");
 819                         owner_grouplen = sizeof("nobody") - 1;
 820                         /* goto out; */
 821                 }
 822                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 823         }
 824         if (iap->ia_valid & ATTR_ATIME_SET)
 825                 len += 16;
 826         else if (iap->ia_valid & ATTR_ATIME)
 827                 len += 4;
 828         if (iap->ia_valid & ATTR_MTIME_SET)
 829                 len += 16;
 830         else if (iap->ia_valid & ATTR_MTIME)
 831                 len += 4;
 832         RESERVE_SPACE(len);
 833
 834         /*
 835          * We write the bitmap length now, but leave the bitmap and the attribute
 836          * buffer length to be backfilled at the end of this routine.
 837          */
 838         WRITE32(2);
 839         q = p;
 840         p += 3;
 841
 842         if (iap->ia_valid & ATTR_SIZE) {
 843                 bmval0 |= FATTR4_WORD0_SIZE;
 844                 WRITE64(iap->ia_size);
 845         }
 846         if (iap->ia_valid & ATTR_MODE) {
 847                 bmval1 |= FATTR4_WORD1_MODE;
 848                 WRITE32(iap->ia_mode & S_IALLUGO);
 849         }
 850         if (iap->ia_valid & ATTR_UID) {
 851                 bmval1 |= FATTR4_WORD1_OWNER;
 852                 WRITE32(owner_namelen);
 853                 WRITEMEM(owner_name, owner_namelen);
 854         }
 855         if (iap->ia_valid & ATTR_GID) {
 856                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 857                 WRITE32(owner_grouplen);
 858                 WRITEMEM(owner_group, owner_grouplen);
 859         }
 860         if (iap->ia_valid & ATTR_ATIME_SET) {
 861                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 862                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 863                 WRITE32(0);
 864                 WRITE32(iap->ia_mtime.tv_sec);
 865                 WRITE32(iap->ia_mtime.tv_nsec);
 866         }
 867         else if (iap->ia_valid & ATTR_ATIME) {
 868                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 869                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 870         }
 871         if (iap->ia_valid & ATTR_MTIME_SET) {
 872                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 873                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 874                 WRITE32(0);
 875                 WRITE32(iap->ia_mtime.tv_sec);
 876                 WRITE32(iap->ia_mtime.tv_nsec);
 877         }
 878         else if (iap->ia_valid & ATTR_MTIME) {
 879                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 880                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 881         }
 882
 883         /*
 884          * Now we backfill the bitmap and the attribute buffer length.
 885          */
 886         if (len != ((char *)p - (char *)q) + 4) {
 887                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 888                                 len, ((char *)p - (char *)q) + 4);
 889                 BUG();
 890         }
 891         len = (char *)p - (char *)q - 12;
 892         *q++ = htonl(bmval0);
 893         *q++ = htonl(bmval1);
 894         *q++ = htonl(len);
 895
 896 /* out: */
 897 }
 898
 899 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 900 {
 901         __be32 *p;
 902
 903         RESERVE_SPACE(8);
 904         WRITE32(OP_ACCESS);
 905         WRITE32(access);
 906         hdr->nops++;
 907         hdr->replen += decode_access_maxsz;
 908 }
 909
 910 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 911 {
 912         __be32 *p;
 913
 914         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 915         WRITE32(OP_CLOSE);
 916         WRITE32(arg->seqid->sequence->counter);
 917         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 918         hdr->nops++;
 919         hdr->replen += decode_close_maxsz;
 920 }
 921
 922 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 923 {
 924         __be32 *p;
 925
 926         RESERVE_SPACE(16);
 927         WRITE32(OP_COMMIT);
 928         WRITE64(args->offset);
 929         WRITE32(args->count);
 930         hdr->nops++;
 931         hdr->replen += decode_commit_maxsz;
 932 }
 933
 934 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 935 {
 936         __be32 *p;
 937
 938         RESERVE_SPACE(8);
 939         WRITE32(OP_CREATE);
 940         WRITE32(create->ftype);
 941
 942         switch (create->ftype) {
 943         case NF4LNK:
 944                 RESERVE_SPACE(4);
 945                 WRITE32(create->u.symlink.len);
 946                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 947                 break;
 948
 949         case NF4BLK: case NF4CHR:
 950                 RESERVE_SPACE(8);
 951                 WRITE32(create->u.device.specdata1);
 952                 WRITE32(create->u.device.specdata2);
 953                 break;
 954
 955         default:
 956                 break;
 957         }
 958
 959         RESERVE_SPACE(4 + create->name->len);
 960         WRITE32(create->name->len);
 961         WRITEMEM(create->name->name, create->name->len);
 962         hdr->nops++;
 963         hdr->replen += decode_create_maxsz;
 964
 965         encode_attrs(xdr, create->attrs, create->server);
 966 }
 967
 968 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 969 {
 970         __be32 *p;
 971
 972         RESERVE_SPACE(12);
 973         WRITE32(OP_GETATTR);
 974         WRITE32(1);
 975         WRITE32(bitmap);
 976         hdr->nops++;
 977         hdr->replen += decode_getattr_maxsz;
 978 }
 979
 980 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 981 {
 982         __be32 *p;
 983
 984         RESERVE_SPACE(16);
 985         WRITE32(OP_GETATTR);
 986         WRITE32(2);
 987         WRITE32(bm0);
 988         WRITE32(bm1);
 989         hdr->nops++;
 990         hdr->replen += decode_getattr_maxsz;
 991 }
 992
 993 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 994 {
 995         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 996                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 997 }
 998
 999 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1000 {
1001         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1002                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1003 }
1004
1005 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1006 {
1007         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1008                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1009 }
1010
1011 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1012 {
1013         __be32 *p;
1014
1015         RESERVE_SPACE(4);
1016         WRITE32(OP_GETFH);
1017         hdr->nops++;
1018         hdr->replen += decode_getfh_maxsz;
1019 }
1020
1021 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1022 {
1023         __be32 *p;
1024
1025         RESERVE_SPACE(8 + name->len);
1026         WRITE32(OP_LINK);
1027         WRITE32(name->len);
1028         WRITEMEM(name->name, name->len);
1029         hdr->nops++;
1030         hdr->replen += decode_link_maxsz;
1031 }
1032
1033 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1034 {
1035         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1036                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1037         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1038 }
1039
1040 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1041 {
1042         if (fl->fl_end == OFFSET_MAX)
1043                 return ~(uint64_t)0;
1044         return fl->fl_end - fl->fl_start + 1;
1045 }
1046
1047 /*
1048  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1049  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1050  */
1051 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1052 {
1053         __be32 *p;
1054
1055         RESERVE_SPACE(32);
1056         WRITE32(OP_LOCK);
1057         WRITE32(nfs4_lock_type(args->fl, args->block));
1058         WRITE32(args->reclaim);
1059         WRITE64(args->fl->fl_start);
1060         WRITE64(nfs4_lock_length(args->fl));
1061         WRITE32(args->new_lock_owner);
1062         if (args->new_lock_owner){
1063                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1064                 WRITE32(args->open_seqid->sequence->counter);
1065                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
1066                 WRITE32(args->lock_seqid->sequence->counter);
1067                 WRITE64(args->lock_owner.clientid);
1068                 WRITE32(16);
1069                 WRITEMEM("lock id:", 8);
1070                 WRITE64(args->lock_owner.id);
1071         }
1072         else {
1073                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1074                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
1075                 WRITE32(args->lock_seqid->sequence->counter);
1076         }
1077         hdr->nops++;
1078         hdr->replen += decode_lock_maxsz;
1079 }
1080
1081 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1082 {
1083         __be32 *p;
1084
1085         RESERVE_SPACE(52);
1086         WRITE32(OP_LOCKT);
1087         WRITE32(nfs4_lock_type(args->fl, 0));
1088         WRITE64(args->fl->fl_start);
1089         WRITE64(nfs4_lock_length(args->fl));
1090         WRITE64(args->lock_owner.clientid);
1091         WRITE32(16);
1092         WRITEMEM("lock id:", 8);
1093         WRITE64(args->lock_owner.id);
1094         hdr->nops++;
1095         hdr->replen += decode_lockt_maxsz;
1096 }
1097
1098 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1099 {
1100         __be32 *p;
1101
1102         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1103         WRITE32(OP_LOCKU);
1104         WRITE32(nfs4_lock_type(args->fl, 0));
1105         WRITE32(args->seqid->sequence->counter);
1106         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
1107         WRITE64(args->fl->fl_start);
1108         WRITE64(nfs4_lock_length(args->fl));
1109         hdr->nops++;
1110         hdr->replen += decode_locku_maxsz;
1111 }
1112
1113 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1114 {
1115         int len = name->len;
1116         __be32 *p;
1117
1118         RESERVE_SPACE(8 + len);
1119         WRITE32(OP_LOOKUP);
1120         WRITE32(len);
1121         WRITEMEM(name->name, len);
1122         hdr->nops++;
1123         hdr->replen += decode_lookup_maxsz;
1124 }
1125
1126 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1127 {
1128         __be32 *p;
1129
1130         RESERVE_SPACE(8);
1131         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1132         case FMODE_READ:
1133                 WRITE32(NFS4_SHARE_ACCESS_READ);
1134                 break;
1135         case FMODE_WRITE:
1136                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
1137                 break;
1138         case FMODE_READ|FMODE_WRITE:
1139                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
1140                 break;
1141         default:
1142                 WRITE32(0);
1143         }
1144         WRITE32(0);             /* for linux, share_deny = 0 always */
1145 }
1146
1147 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1148 {
1149         __be32 *p;
1150  /*
1151  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1152  * owner 4 = 32
1153  */
1154         RESERVE_SPACE(8);
1155         WRITE32(OP_OPEN);
1156         WRITE32(arg->seqid->sequence->counter);
1157         encode_share_access(xdr, arg->fmode);
1158         RESERVE_SPACE(28);
1159         WRITE64(arg->clientid);
1160         WRITE32(16);
1161         WRITEMEM("open id:", 8);
1162         WRITE64(arg->id);
1163 }
1164
1165 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1166 {
1167         __be32 *p;
1168
1169         RESERVE_SPACE(4);
1170         switch(arg->open_flags & O_EXCL) {
1171         case 0:
1172                 WRITE32(NFS4_CREATE_UNCHECKED);
1173                 encode_attrs(xdr, arg->u.attrs, arg->server);
1174                 break;
1175         default:
1176                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1177                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1178         }
1179 }
1180
1181 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1182 {
1183         __be32 *p;
1184
1185         RESERVE_SPACE(4);
1186         switch (arg->open_flags & O_CREAT) {
1187         case 0:
1188                 WRITE32(NFS4_OPEN_NOCREATE);
1189                 break;
1190         default:
1191                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1192                 WRITE32(NFS4_OPEN_CREATE);
1193                 encode_createmode(xdr, arg);
1194         }
1195 }
1196
1197 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1198 {
1199         __be32 *p;
1200
1201         RESERVE_SPACE(4);
1202         switch (delegation_type) {
1203         case 0:
1204                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1205                 break;
1206         case FMODE_READ:
1207                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1208                 break;
1209         case FMODE_WRITE|FMODE_READ:
1210                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1211                 break;
1212         default:
1213                 BUG();
1214         }
1215 }
1216
1217 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1218 {
1219         __be32 *p;
1220
1221         RESERVE_SPACE(4);
1222         WRITE32(NFS4_OPEN_CLAIM_NULL);
1223         encode_string(xdr, name->len, name->name);
1224 }
1225
1226 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1227 {
1228         __be32 *p;
1229
1230         RESERVE_SPACE(4);
1231         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1232         encode_delegation_type(xdr, type);
1233 }
1234
1235 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1236 {
1237         __be32 *p;
1238
1239         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1240         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1241         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1242         encode_string(xdr, name->len, name->name);
1243 }
1244
1245 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1246 {
1247         encode_openhdr(xdr, arg);
1248         encode_opentype(xdr, arg);
1249         switch (arg->claim) {
1250         case NFS4_OPEN_CLAIM_NULL:
1251                 encode_claim_null(xdr, arg->name);
1252                 break;
1253         case NFS4_OPEN_CLAIM_PREVIOUS:
1254                 encode_claim_previous(xdr, arg->u.delegation_type);
1255                 break;
1256         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1257                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1258                 break;
1259         default:
1260                 BUG();
1261         }
1262         hdr->nops++;
1263         hdr->replen += decode_open_maxsz;
1264 }
1265
1266 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1271         WRITE32(OP_OPEN_CONFIRM);
1272         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1273         WRITE32(arg->seqid->sequence->counter);
1274         hdr->nops++;
1275         hdr->replen += decode_open_confirm_maxsz;
1276 }
1277
1278 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1279 {
1280         __be32 *p;
1281
1282         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1283         WRITE32(OP_OPEN_DOWNGRADE);
1284         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1285         WRITE32(arg->seqid->sequence->counter);
1286         encode_share_access(xdr, arg->fmode);
1287         hdr->nops++;
1288         hdr->replen += decode_open_downgrade_maxsz;
1289 }
1290
1291 static void
1292 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1293 {
1294         int len = fh->size;
1295         __be32 *p;
1296
1297         RESERVE_SPACE(8 + len);
1298         WRITE32(OP_PUTFH);
1299         WRITE32(len);
1300         WRITEMEM(fh->data, len);
1301         hdr->nops++;
1302         hdr->replen += decode_putfh_maxsz;
1303 }
1304
1305 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1306 {
1307         __be32 *p;
1308
1309         RESERVE_SPACE(4);
1310         WRITE32(OP_PUTROOTFH);
1311         hdr->nops++;
1312         hdr->replen += decode_putrootfh_maxsz;
1313 }
1314
1315 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1316 {
1317         nfs4_stateid stateid;
1318         __be32 *p;
1319
1320         RESERVE_SPACE(NFS4_STATEID_SIZE);
1321         if (ctx->state != NULL) {
1322                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1323                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1324         } else
1325                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1326 }
1327
1328 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1329 {
1330         __be32 *p;
1331
1332         RESERVE_SPACE(4);
1333         WRITE32(OP_READ);
1334
1335         encode_stateid(xdr, args->context);
1336
1337         RESERVE_SPACE(12);
1338         WRITE64(args->offset);
1339         WRITE32(args->count);
1340         hdr->nops++;
1341         hdr->replen += decode_read_maxsz;
1342 }
1343
1344 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1345 {
1346         uint32_t attrs[2] = {
1347                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1348                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1349         };
1350         __be32 *p;
1351
1352         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1353         WRITE32(OP_READDIR);
1354         WRITE64(readdir->cookie);
1355         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1356         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1357         WRITE32(readdir->count);
1358         WRITE32(2);
1359         /* Switch to mounted_on_fileid if the server supports it */
1360         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1361                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1362         else
1363                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1364         WRITE32(attrs[0] & readdir->bitmask[0]);
1365         WRITE32(attrs[1] & readdir->bitmask[1]);
1366         hdr->nops++;
1367         hdr->replen += decode_readdir_maxsz;
1368         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1369                         __func__,
1370                         (unsigned long long)readdir->cookie,
1371                         ((u32 *)readdir->verifier.data)[0],
1372                         ((u32 *)readdir->verifier.data)[1],
1373                         attrs[0] & readdir->bitmask[0],
1374                         attrs[1] & readdir->bitmask[1]);
1375 }
1376
1377 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1378 {
1379         __be32 *p;
1380
1381         RESERVE_SPACE(4);
1382         WRITE32(OP_READLINK);
1383         hdr->nops++;
1384         hdr->replen += decode_readlink_maxsz;
1385 }
1386
1387 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1388 {
1389         __be32 *p;
1390
1391         RESERVE_SPACE(8 + name->len);
1392         WRITE32(OP_REMOVE);
1393         WRITE32(name->len);
1394         WRITEMEM(name->name, name->len);
1395         hdr->nops++;
1396         hdr->replen += decode_remove_maxsz;
1397 }
1398
1399 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1400 {
1401         __be32 *p;
1402
1403         RESERVE_SPACE(8 + oldname->len);
1404         WRITE32(OP_RENAME);
1405         WRITE32(oldname->len);
1406         WRITEMEM(oldname->name, oldname->len);
1407
1408         RESERVE_SPACE(4 + newname->len);
1409         WRITE32(newname->len);
1410         WRITEMEM(newname->name, newname->len);
1411         hdr->nops++;
1412         hdr->replen += decode_rename_maxsz;
1413 }
1414
1415 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1416 {
1417         __be32 *p;
1418
1419         RESERVE_SPACE(12);
1420         WRITE32(OP_RENEW);
1421         WRITE64(client_stateid->cl_clientid);
1422         hdr->nops++;
1423         hdr->replen += decode_renew_maxsz;
1424 }
1425
1426 static void
1427 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1428 {
1429         __be32 *p;
1430
1431         RESERVE_SPACE(4);
1432         WRITE32(OP_RESTOREFH);
1433         hdr->nops++;
1434         hdr->replen += decode_restorefh_maxsz;
1435 }
1436
1437 static int
1438 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1439 {
1440         __be32 *p;
1441
1442         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1443         WRITE32(OP_SETATTR);
1444         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1445         RESERVE_SPACE(2*4);
1446         WRITE32(1);
1447         WRITE32(FATTR4_WORD0_ACL);
1448         if (arg->acl_len % 4)
1449                 return -EINVAL;
1450         RESERVE_SPACE(4);
1451         WRITE32(arg->acl_len);
1452         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1453         hdr->nops++;
1454         hdr->replen += decode_setacl_maxsz;
1455         return 0;
1456 }
1457
1458 static void
1459 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1460 {
1461         __be32 *p;
1462
1463         RESERVE_SPACE(4);
1464         WRITE32(OP_SAVEFH);
1465         hdr->nops++;
1466         hdr->replen += decode_savefh_maxsz;
1467 }
1468
1469 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1470 {
1471         __be32 *p;
1472
1473         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1474         WRITE32(OP_SETATTR);
1475         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1476         hdr->nops++;
1477         hdr->replen += decode_setattr_maxsz;
1478         encode_attrs(xdr, arg->iap, server);
1479 }
1480
1481 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1482 {
1483         __be32 *p;
1484
1485         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1486         WRITE32(OP_SETCLIENTID);
1487         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1488
1489         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1490         RESERVE_SPACE(4);
1491         WRITE32(setclientid->sc_prog);
1492         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1493         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1494         RESERVE_SPACE(4);
1495         WRITE32(setclientid->sc_cb_ident);
1496         hdr->nops++;
1497         hdr->replen += decode_setclientid_maxsz;
1498 }
1499
1500 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1501 {
1502         __be32 *p;
1503
1504         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1505         WRITE32(OP_SETCLIENTID_CONFIRM);
1506         WRITE64(client_state->cl_clientid);
1507         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1508         hdr->nops++;
1509         hdr->replen += decode_setclientid_confirm_maxsz;
1510 }
1511
1512 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1513 {
1514         __be32 *p;
1515
1516         RESERVE_SPACE(4);
1517         WRITE32(OP_WRITE);
1518
1519         encode_stateid(xdr, args->context);
1520
1521         RESERVE_SPACE(16);
1522         WRITE64(args->offset);
1523         WRITE32(args->stable);
1524         WRITE32(args->count);
1525
1526         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1527         hdr->nops++;
1528         hdr->replen += decode_write_maxsz;
1529 }
1530
1531 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1532 {
1533         __be32 *p;
1534
1535         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1536
1537         WRITE32(OP_DELEGRETURN);
1538         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1539         hdr->nops++;
1540         hdr->replen += decode_delegreturn_maxsz;
1541 }
1542
1543 #if defined(CONFIG_NFS_V4_1)
1544 /* NFSv4.1 operations */
1545 static void encode_exchange_id(struct xdr_stream *xdr,
1546                                struct nfs41_exchange_id_args *args,
1547                                struct compound_hdr *hdr)
1548 {
1549         __be32 *p;
1550
1551         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1552         WRITE32(OP_EXCHANGE_ID);
1553         WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
1554
1555         encode_string(xdr, args->id_len, args->id);
1556
1557         RESERVE_SPACE(12);
1558         WRITE32(args->flags);
1559         WRITE32(0);     /* zero length state_protect4_a */
1560         WRITE32(0);     /* zero length implementation id array */
1561         hdr->nops++;
1562         hdr->replen += decode_exchange_id_maxsz;
1563 }
1564
1565 static void encode_create_session(struct xdr_stream *xdr,
1566                                   struct nfs41_create_session_args *args,
1567                                   struct compound_hdr *hdr)
1568 {
1569         __be32 *p;
1570         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1571         uint32_t len;
1572         struct nfs_client *clp = args->client;
1573
1574         RESERVE_SPACE(4);
1575         WRITE32(OP_CREATE_SESSION);
1576
1577         RESERVE_SPACE(8);
1578         WRITE64(clp->cl_ex_clid);
1579
1580         RESERVE_SPACE(8);
1581         WRITE32(clp->cl_seqid);                 /*Sequence id */
1582         WRITE32(args->flags);                   /*flags */
1583
1584         RESERVE_SPACE(2*28);                    /* 2 channel_attrs */
1585         /* Fore Channel */
1586         WRITE32(args->fc_attrs.headerpadsz);    /* header padding size */
1587         WRITE32(args->fc_attrs.max_rqst_sz);    /* max req size */
1588         WRITE32(args->fc_attrs.max_resp_sz);    /* max resp size */
1589         WRITE32(args->fc_attrs.max_resp_sz_cached);     /* Max resp sz cached */
1590         WRITE32(args->fc_attrs.max_ops);        /* max operations */
1591         WRITE32(args->fc_attrs.max_reqs);       /* max requests */
1592         WRITE32(0);                             /* rdmachannel_attrs */
1593
1594         /* Back Channel */
1595         WRITE32(args->fc_attrs.headerpadsz);    /* header padding size */
1596         WRITE32(args->bc_attrs.max_rqst_sz);    /* max req size */
1597         WRITE32(args->bc_attrs.max_resp_sz);    /* max resp size */
1598         WRITE32(args->bc_attrs.max_resp_sz_cached);     /* Max resp sz cached */
1599         WRITE32(args->bc_attrs.max_ops);        /* max operations */
1600         WRITE32(args->bc_attrs.max_reqs);       /* max requests */
1601         WRITE32(0);                             /* rdmachannel_attrs */
1602
1603         RESERVE_SPACE(4);
1604         WRITE32(args->cb_program);              /* cb_program */
1605
1606         RESERVE_SPACE(4);                       /* # of security flavors */
1607         WRITE32(1);
1608
1609         RESERVE_SPACE(4);
1610         WRITE32(RPC_AUTH_UNIX);                 /* auth_sys */
1611
1612         /* authsys_parms rfc1831 */
1613         RESERVE_SPACE(4);
1614         WRITE32((u32)clp->cl_boot_time.tv_nsec);        /* stamp */
1615         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1616                         clp->cl_ipaddr);
1617         RESERVE_SPACE(16 + len);
1618         WRITE32(len);
1619         WRITEMEM(machine_name, len);
1620         WRITE32(0);                             /* UID */
1621         WRITE32(0);                             /* GID */
1622         WRITE32(0);                             /* No more gids */
1623         hdr->nops++;
1624         hdr->replen += decode_create_session_maxsz;
1625 }
1626
1627 static void encode_destroy_session(struct xdr_stream *xdr,
1628                                    struct nfs4_session *session,
1629                                    struct compound_hdr *hdr)
1630 {
1631         __be32 *p;
1632         RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN);
1633         WRITE32(OP_DESTROY_SESSION);
1634         WRITEMEM(session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1635         hdr->nops++;
1636         hdr->replen += decode_destroy_session_maxsz;
1637 }
1638 #endif /* CONFIG_NFS_V4_1 */
1639
1640 static void encode_sequence(struct xdr_stream *xdr,
1641                             const struct nfs4_sequence_args *args,
1642                             struct compound_hdr *hdr)
1643 {
1644 #if defined(CONFIG_NFS_V4_1)
1645         struct nfs4_session *session = args->sa_session;
1646         struct nfs4_slot_table *tp;
1647         struct nfs4_slot *slot;
1648         __be32 *p;
1649
1650         if (!session)
1651                 return;
1652
1653         tp = &session->fc_slot_table;
1654
1655         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1656         slot = tp->slots + args->sa_slotid;
1657
1658         RESERVE_SPACE(4);
1659         WRITE32(OP_SEQUENCE);
1660
1661         /*
1662          * Sessionid + seqid + slotid + max slotid + cache_this
1663          */
1664         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1665                 "max_slotid=%d cache_this=%d\n",
1666                 __func__,
1667                 ((u32 *)session->sess_id.data)[0],
1668                 ((u32 *)session->sess_id.data)[1],
1669                 ((u32 *)session->sess_id.data)[2],
1670                 ((u32 *)session->sess_id.data)[3],
1671                 slot->seq_nr, args->sa_slotid,
1672                 tp->highest_used_slotid, args->sa_cache_this);
1673         RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 16);
1674         WRITEMEM(session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1675         WRITE32(slot->seq_nr);
1676         WRITE32(args->sa_slotid);
1677         WRITE32(tp->highest_used_slotid);
1678         WRITE32(args->sa_cache_this);
1679         hdr->nops++;
1680         hdr->replen += decode_sequence_maxsz;
1681 #endif /* CONFIG_NFS_V4_1 */
1682 }
1683
1684 /*
1685  * END OF "GENERIC" ENCODE ROUTINES.
1686  */
1687
1688 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1689 {
1690 #if defined(CONFIG_NFS_V4_1)
1691         if (args->sa_session)
1692                 return args->sa_session->clp->cl_minorversion;
1693 #endif /* CONFIG_NFS_V4_1 */
1694         return 0;
1695 }
1696
1697 /*
1698  * Encode an ACCESS request
1699  */
1700 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1701 {
1702         struct xdr_stream xdr;
1703         struct compound_hdr hdr = {
1704                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1705         };
1706
1707         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1708         encode_compound_hdr(&xdr, req, &hdr);
1709         encode_sequence(&xdr, &args->seq_args, &hdr);
1710         encode_putfh(&xdr, args->fh, &hdr);
1711         encode_access(&xdr, args->access, &hdr);
1712         encode_getfattr(&xdr, args->bitmask, &hdr);
1713         encode_nops(&hdr);
1714         return 0;
1715 }
1716
1717 /*
1718  * Encode LOOKUP request
1719  */
1720 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1721 {
1722         struct xdr_stream xdr;
1723         struct compound_hdr hdr = {
1724                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1725         };
1726
1727         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1728         encode_compound_hdr(&xdr, req, &hdr);
1729         encode_sequence(&xdr, &args->seq_args, &hdr);
1730         encode_putfh(&xdr, args->dir_fh, &hdr);
1731         encode_lookup(&xdr, args->name, &hdr);
1732         encode_getfh(&xdr, &hdr);
1733         encode_getfattr(&xdr, args->bitmask, &hdr);
1734         encode_nops(&hdr);
1735         return 0;
1736 }
1737
1738 /*
1739  * Encode LOOKUP_ROOT request
1740  */
1741 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1742 {
1743         struct xdr_stream xdr;
1744         struct compound_hdr hdr = {
1745                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1746         };
1747
1748         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1749         encode_compound_hdr(&xdr, req, &hdr);
1750         encode_sequence(&xdr, &args->seq_args, &hdr);
1751         encode_putrootfh(&xdr, &hdr);
1752         encode_getfh(&xdr, &hdr);
1753         encode_getfattr(&xdr, args->bitmask, &hdr);
1754         encode_nops(&hdr);
1755         return 0;
1756 }
1757
1758 /*
1759  * Encode REMOVE request
1760  */
1761 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1762 {
1763         struct xdr_stream xdr;
1764         struct compound_hdr hdr = {
1765                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1766         };
1767
1768         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1769         encode_compound_hdr(&xdr, req, &hdr);
1770         encode_sequence(&xdr, &args->seq_args, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_remove(&xdr, &args->name, &hdr);
1773         encode_getfattr(&xdr, args->bitmask, &hdr);
1774         encode_nops(&hdr);
1775         return 0;
1776 }
1777
1778 /*
1779  * Encode RENAME request
1780  */
1781 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1782 {
1783         struct xdr_stream xdr;
1784         struct compound_hdr hdr = {
1785                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1786         };
1787
1788         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1789         encode_compound_hdr(&xdr, req, &hdr);
1790         encode_sequence(&xdr, &args->seq_args, &hdr);
1791         encode_putfh(&xdr, args->old_dir, &hdr);
1792         encode_savefh(&xdr, &hdr);
1793         encode_putfh(&xdr, args->new_dir, &hdr);
1794         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1795         encode_getfattr(&xdr, args->bitmask, &hdr);
1796         encode_restorefh(&xdr, &hdr);
1797         encode_getfattr(&xdr, args->bitmask, &hdr);
1798         encode_nops(&hdr);
1799         return 0;
1800 }
1801
1802 /*
1803  * Encode LINK request
1804  */
1805 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1806 {
1807         struct xdr_stream xdr;
1808         struct compound_hdr hdr = {
1809                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1810         };
1811
1812         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1813         encode_compound_hdr(&xdr, req, &hdr);
1814         encode_sequence(&xdr, &args->seq_args, &hdr);
1815         encode_putfh(&xdr, args->fh, &hdr);
1816         encode_savefh(&xdr, &hdr);
1817         encode_putfh(&xdr, args->dir_fh, &hdr);
1818         encode_link(&xdr, args->name, &hdr);
1819         encode_getfattr(&xdr, args->bitmask, &hdr);
1820         encode_restorefh(&xdr, &hdr);
1821         encode_getfattr(&xdr, args->bitmask, &hdr);
1822         encode_nops(&hdr);
1823         return 0;
1824 }
1825
1826 /*
1827  * Encode CREATE request
1828  */
1829 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1830 {
1831         struct xdr_stream xdr;
1832         struct compound_hdr hdr = {
1833                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1834         };
1835
1836         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1837         encode_compound_hdr(&xdr, req, &hdr);
1838         encode_sequence(&xdr, &args->seq_args, &hdr);
1839         encode_putfh(&xdr, args->dir_fh, &hdr);
1840         encode_savefh(&xdr, &hdr);
1841         encode_create(&xdr, args, &hdr);
1842         encode_getfh(&xdr, &hdr);
1843         encode_getfattr(&xdr, args->bitmask, &hdr);
1844         encode_restorefh(&xdr, &hdr);
1845         encode_getfattr(&xdr, args->bitmask, &hdr);
1846         encode_nops(&hdr);
1847         return 0;
1848 }
1849
1850 /*
1851  * Encode SYMLINK request
1852  */
1853 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1854 {
1855         return nfs4_xdr_enc_create(req, p, args);
1856 }
1857
1858 /*
1859  * Encode GETATTR request
1860  */
1861 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1862 {
1863         struct xdr_stream xdr;
1864         struct compound_hdr hdr = {
1865                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1866         };
1867
1868         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1869         encode_compound_hdr(&xdr, req, &hdr);
1870         encode_sequence(&xdr, &args->seq_args, &hdr);
1871         encode_putfh(&xdr, args->fh, &hdr);
1872         encode_getfattr(&xdr, args->bitmask, &hdr);
1873         encode_nops(&hdr);
1874         return 0;
1875 }
1876
1877 /*
1878  * Encode a CLOSE request
1879  */
1880 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1881 {
1882         struct xdr_stream xdr;
1883         struct compound_hdr hdr = {
1884                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1885         };
1886
1887         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1888         encode_compound_hdr(&xdr, req, &hdr);
1889         encode_sequence(&xdr, &args->seq_args, &hdr);
1890         encode_putfh(&xdr, args->fh, &hdr);
1891         encode_close(&xdr, args, &hdr);
1892         encode_getfattr(&xdr, args->bitmask, &hdr);
1893         encode_nops(&hdr);
1894         return 0;
1895 }
1896
1897 /*
1898  * Encode an OPEN request
1899  */
1900 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1901 {
1902         struct xdr_stream xdr;
1903         struct compound_hdr hdr = {
1904                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1905         };
1906
1907         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1908         encode_compound_hdr(&xdr, req, &hdr);
1909         encode_sequence(&xdr, &args->seq_args, &hdr);
1910         encode_putfh(&xdr, args->fh, &hdr);
1911         encode_savefh(&xdr, &hdr);
1912         encode_open(&xdr, args, &hdr);
1913         encode_getfh(&xdr, &hdr);
1914         encode_getfattr(&xdr, args->bitmask, &hdr);
1915         encode_restorefh(&xdr, &hdr);
1916         encode_getfattr(&xdr, args->bitmask, &hdr);
1917         encode_nops(&hdr);
1918         return 0;
1919 }
1920
1921 /*
1922  * Encode an OPEN_CONFIRM request
1923  */
1924 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1925 {
1926         struct xdr_stream xdr;
1927         struct compound_hdr hdr = {
1928                 .nops   = 0,
1929         };
1930
1931         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1932         encode_compound_hdr(&xdr, req, &hdr);
1933         encode_putfh(&xdr, args->fh, &hdr);
1934         encode_open_confirm(&xdr, args, &hdr);
1935         encode_nops(&hdr);
1936         return 0;
1937 }
1938
1939 /*
1940  * Encode an OPEN request with no attributes.
1941  */
1942 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1943 {
1944         struct xdr_stream xdr;
1945         struct compound_hdr hdr = {
1946                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1947         };
1948
1949         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1950         encode_compound_hdr(&xdr, req, &hdr);
1951         encode_sequence(&xdr, &args->seq_args, &hdr);
1952         encode_putfh(&xdr, args->fh, &hdr);
1953         encode_open(&xdr, args, &hdr);
1954         encode_getfattr(&xdr, args->bitmask, &hdr);
1955         encode_nops(&hdr);
1956         return 0;
1957 }
1958
1959 /*
1960  * Encode an OPEN_DOWNGRADE request
1961  */
1962 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1963 {
1964         struct xdr_stream xdr;
1965         struct compound_hdr hdr = {
1966                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1967         };
1968
1969         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1970         encode_compound_hdr(&xdr, req, &hdr);
1971         encode_sequence(&xdr, &args->seq_args, &hdr);
1972         encode_putfh(&xdr, args->fh, &hdr);
1973         encode_open_downgrade(&xdr, args, &hdr);
1974         encode_getfattr(&xdr, args->bitmask, &hdr);
1975         encode_nops(&hdr);
1976         return 0;
1977 }
1978
1979 /*
1980  * Encode a LOCK request
1981  */
1982 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1983 {
1984         struct xdr_stream xdr;
1985         struct compound_hdr hdr = {
1986                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1987         };
1988
1989         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1990         encode_compound_hdr(&xdr, req, &hdr);
1991         encode_sequence(&xdr, &args->seq_args, &hdr);
1992         encode_putfh(&xdr, args->fh, &hdr);
1993         encode_lock(&xdr, args, &hdr);
1994         encode_nops(&hdr);
1995         return 0;
1996 }
1997
1998 /*
1999  * Encode a LOCKT request
2000  */
2001 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2002 {
2003         struct xdr_stream xdr;
2004         struct compound_hdr hdr = {
2005                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2006         };
2007
2008         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2009         encode_compound_hdr(&xdr, req, &hdr);
2010         encode_sequence(&xdr, &args->seq_args, &hdr);
2011         encode_putfh(&xdr, args->fh, &hdr);
2012         encode_lockt(&xdr, args, &hdr);
2013         encode_nops(&hdr);
2014         return 0;
2015 }
2016
2017 /*
2018  * Encode a LOCKU request
2019  */
2020 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2021 {
2022         struct xdr_stream xdr;
2023         struct compound_hdr hdr = {
2024                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2025         };
2026
2027         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2028         encode_compound_hdr(&xdr, req, &hdr);
2029         encode_sequence(&xdr, &args->seq_args, &hdr);
2030         encode_putfh(&xdr, args->fh, &hdr);
2031         encode_locku(&xdr, args, &hdr);
2032         encode_nops(&hdr);
2033         return 0;
2034 }
2035
2036 /*
2037  * Encode a READLINK request
2038  */
2039 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2040 {
2041         struct xdr_stream xdr;
2042         struct compound_hdr hdr = {
2043                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2044         };
2045
2046         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2047         encode_compound_hdr(&xdr, req, &hdr);
2048         encode_sequence(&xdr, &args->seq_args, &hdr);
2049         encode_putfh(&xdr, args->fh, &hdr);
2050         encode_readlink(&xdr, args, req, &hdr);
2051
2052         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2053                         args->pgbase, args->pglen);
2054         encode_nops(&hdr);
2055         return 0;
2056 }
2057
2058 /*
2059  * Encode a READDIR request
2060  */
2061 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2062 {
2063         struct xdr_stream xdr;
2064         struct compound_hdr hdr = {
2065                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2066         };
2067
2068         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2069         encode_compound_hdr(&xdr, req, &hdr);
2070         encode_sequence(&xdr, &args->seq_args, &hdr);
2071         encode_putfh(&xdr, args->fh, &hdr);
2072         encode_readdir(&xdr, args, req, &hdr);
2073
2074         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2075                          args->pgbase, args->count);
2076         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2077                         __func__, hdr.replen << 2, args->pages,
2078                         args->pgbase, args->count);
2079         encode_nops(&hdr);
2080         return 0;
2081 }
2082
2083 /*
2084  * Encode a READ request
2085  */
2086 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2087 {
2088         struct xdr_stream xdr;
2089         struct compound_hdr hdr = {
2090                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2091         };
2092
2093         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2094         encode_compound_hdr(&xdr, req, &hdr);
2095         encode_sequence(&xdr, &args->seq_args, &hdr);
2096         encode_putfh(&xdr, args->fh, &hdr);
2097         encode_read(&xdr, args, &hdr);
2098
2099         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2100                          args->pages, args->pgbase, args->count);
2101         req->rq_rcv_buf.flags |= XDRBUF_READ;
2102         encode_nops(&hdr);
2103         return 0;
2104 }
2105
2106 /*
2107  * Encode an SETATTR request
2108  */
2109 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2110 {
2111         struct xdr_stream xdr;
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115
2116         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2117         encode_compound_hdr(&xdr, req, &hdr);
2118         encode_sequence(&xdr, &args->seq_args, &hdr);
2119         encode_putfh(&xdr, args->fh, &hdr);
2120         encode_setattr(&xdr, args, args->server, &hdr);
2121         encode_getfattr(&xdr, args->bitmask, &hdr);
2122         encode_nops(&hdr);
2123         return 0;
2124 }
2125
2126 /*
2127  * Encode a GETACL request
2128  */
2129 static int
2130 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2131                 struct nfs_getaclargs *args)
2132 {
2133         struct xdr_stream xdr;
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137         uint32_t replen;
2138
2139         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140         encode_compound_hdr(&xdr, req, &hdr);
2141         encode_sequence(&xdr, &args->seq_args, &hdr);
2142         encode_putfh(&xdr, args->fh, &hdr);
2143         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2144         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2145
2146         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2147                 args->acl_pages, args->acl_pgbase, args->acl_len);
2148         encode_nops(&hdr);
2149         return 0;
2150 }
2151
2152 /*
2153  * Encode a WRITE request
2154  */
2155 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2156 {
2157         struct xdr_stream xdr;
2158         struct compound_hdr hdr = {
2159                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160         };
2161
2162         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2163         encode_compound_hdr(&xdr, req, &hdr);
2164         encode_sequence(&xdr, &args->seq_args, &hdr);
2165         encode_putfh(&xdr, args->fh, &hdr);
2166         encode_write(&xdr, args, &hdr);
2167         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2168         encode_getfattr(&xdr, args->bitmask, &hdr);
2169         encode_nops(&hdr);
2170         return 0;
2171 }
2172
2173 /*
2174  *  a COMMIT request
2175  */
2176 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2177 {
2178         struct xdr_stream xdr;
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2184         encode_compound_hdr(&xdr, req, &hdr);
2185         encode_sequence(&xdr, &args->seq_args, &hdr);
2186         encode_putfh(&xdr, args->fh, &hdr);
2187         encode_commit(&xdr, args, &hdr);
2188         encode_getfattr(&xdr, args->bitmask, &hdr);
2189         encode_nops(&hdr);
2190         return 0;
2191 }
2192
2193 /*
2194  * FSINFO request
2195  */
2196 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2197 {
2198         struct xdr_stream xdr;
2199         struct compound_hdr hdr = {
2200                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2201         };
2202
2203         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2204         encode_compound_hdr(&xdr, req, &hdr);
2205         encode_sequence(&xdr, &args->seq_args, &hdr);
2206         encode_putfh(&xdr, args->fh, &hdr);
2207         encode_fsinfo(&xdr, args->bitmask, &hdr);
2208         encode_nops(&hdr);
2209         return 0;
2210 }
2211
2212 /*
2213  * a PATHCONF request
2214  */
2215 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2216 {
2217         struct xdr_stream xdr;
2218         struct compound_hdr hdr = {
2219                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220         };
2221
2222         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2223         encode_compound_hdr(&xdr, req, &hdr);
2224         encode_sequence(&xdr, &args->seq_args, &hdr);
2225         encode_putfh(&xdr, args->fh, &hdr);
2226         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2227                            &hdr);
2228         encode_nops(&hdr);
2229         return 0;
2230 }
2231
2232 /*
2233  * a STATFS request
2234  */
2235 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2236 {
2237         struct xdr_stream xdr;
2238         struct compound_hdr hdr = {
2239                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240         };
2241
2242         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243         encode_compound_hdr(&xdr, req, &hdr);
2244         encode_sequence(&xdr, &args->seq_args, &hdr);
2245         encode_putfh(&xdr, args->fh, &hdr);
2246         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2247                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2248         encode_nops(&hdr);
2249         return 0;
2250 }
2251
2252 /*
2253  * GETATTR_BITMAP request
2254  */
2255 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2256                                     struct nfs4_server_caps_arg *args)
2257 {
2258         struct xdr_stream xdr;
2259         struct compound_hdr hdr = {
2260                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261         };
2262
2263         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2264         encode_compound_hdr(&xdr, req, &hdr);
2265         encode_sequence(&xdr, &args->seq_args, &hdr);
2266         encode_putfh(&xdr, args->fhandle, &hdr);
2267         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2268                            FATTR4_WORD0_LINK_SUPPORT|
2269                            FATTR4_WORD0_SYMLINK_SUPPORT|
2270                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2271         encode_nops(&hdr);
2272         return 0;
2273 }
2274
2275 /*
2276  * a RENEW request
2277  */
2278 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2279 {
2280         struct xdr_stream xdr;
2281         struct compound_hdr hdr = {
2282                 .nops   = 0,
2283         };
2284
2285         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2286         encode_compound_hdr(&xdr, req, &hdr);
2287         encode_renew(&xdr, clp, &hdr);
2288         encode_nops(&hdr);
2289         return 0;
2290 }
2291
2292 /*
2293  * a SETCLIENTID request
2294  */
2295 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2296 {
2297         struct xdr_stream xdr;
2298         struct compound_hdr hdr = {
2299                 .nops   = 0,
2300         };
2301
2302         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2303         encode_compound_hdr(&xdr, req, &hdr);
2304         encode_setclientid(&xdr, sc, &hdr);
2305         encode_nops(&hdr);
2306         return 0;
2307 }
2308
2309 /*
2310  * a SETCLIENTID_CONFIRM request
2311  */
2312 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2313 {
2314         struct xdr_stream xdr;
2315         struct compound_hdr hdr = {
2316                 .nops   = 0,
2317         };
2318         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2319
2320         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2321         encode_compound_hdr(&xdr, req, &hdr);
2322         encode_setclientid_confirm(&xdr, clp, &hdr);
2323         encode_putrootfh(&xdr, &hdr);
2324         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2325         encode_nops(&hdr);
2326         return 0;
2327 }
2328
2329 /*
2330  * DELEGRETURN request
2331  */
2332 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2333 {
2334         struct xdr_stream xdr;
2335         struct compound_hdr hdr = {
2336                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337         };
2338
2339         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2340         encode_compound_hdr(&xdr, req, &hdr);
2341         encode_sequence(&xdr, &args->seq_args, &hdr);
2342         encode_putfh(&xdr, args->fhandle, &hdr);
2343         encode_delegreturn(&xdr, args->stateid, &hdr);
2344         encode_getfattr(&xdr, args->bitmask, &hdr);
2345         encode_nops(&hdr);
2346         return 0;
2347 }
2348
2349 /*
2350  * Encode FS_LOCATIONS request
2351  */
2352 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2353 {
2354         struct xdr_stream xdr;
2355         struct compound_hdr hdr = {
2356                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2357         };
2358         uint32_t replen;
2359
2360         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2361         encode_compound_hdr(&xdr, req, &hdr);
2362         encode_sequence(&xdr, &args->seq_args, &hdr);
2363         encode_putfh(&xdr, args->dir_fh, &hdr);
2364         encode_lookup(&xdr, args->name, &hdr);
2365         replen = hdr.replen;    /* get the attribute into args->page */
2366         encode_fs_locations(&xdr, args->bitmask, &hdr);
2367
2368         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2369                         0, PAGE_SIZE);
2370         encode_nops(&hdr);
2371         return 0;
2372 }
2373
2374 #if defined(CONFIG_NFS_V4_1)
2375 /*
2376  * EXCHANGE_ID request
2377  */
2378 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2379                                     struct nfs41_exchange_id_args *args)
2380 {
2381         struct xdr_stream xdr;
2382         struct compound_hdr hdr = {
2383                 .minorversion = args->client->cl_minorversion,
2384         };
2385
2386         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2387         encode_compound_hdr(&xdr, req, &hdr);
2388         encode_exchange_id(&xdr, args, &hdr);
2389         encode_nops(&hdr);
2390         return 0;
2391 }
2392
2393 /*
2394  * a CREATE_SESSION request
2395  */
2396 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2397                                        struct nfs41_create_session_args *args)
2398 {
2399         struct xdr_stream xdr;
2400         struct compound_hdr hdr = {
2401                 .minorversion = args->client->cl_minorversion,
2402         };
2403
2404         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2405         encode_compound_hdr(&xdr, req, &hdr);
2406         encode_create_session(&xdr, args, &hdr);
2407         encode_nops(&hdr);
2408         return 0;
2409 }
2410
2411 /*
2412  * a DESTROY_SESSION request
2413  */
2414 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2415                                         struct nfs4_session *session)
2416 {
2417         struct xdr_stream xdr;
2418         struct compound_hdr hdr = {
2419                 .minorversion = session->clp->cl_minorversion,
2420         };
2421
2422         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2423         encode_compound_hdr(&xdr, req, &hdr);
2424         encode_destroy_session(&xdr, session, &hdr);
2425         encode_nops(&hdr);
2426         return 0;
2427 }
2428
2429 /*
2430  * a SEQUENCE request
2431  */
2432 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2433                                  struct nfs4_sequence_args *args)
2434 {
2435         struct xdr_stream xdr;
2436         struct compound_hdr hdr = {
2437                 .minorversion = nfs4_xdr_minorversion(args),
2438         };
2439
2440         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2441         encode_compound_hdr(&xdr, req, &hdr);
2442         encode_sequence(&xdr, args, &hdr);
2443         encode_nops(&hdr);
2444         return 0;
2445 }
2446
2447 /*
2448  * a GET_LEASE_TIME request
2449  */
2450 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2451                                        struct nfs4_get_lease_time_args *args)
2452 {
2453         struct xdr_stream xdr;
2454         struct compound_hdr hdr = {
2455                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2456         };
2457         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2458
2459         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2460         encode_compound_hdr(&xdr, req, &hdr);
2461         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2462         encode_putrootfh(&xdr, &hdr);
2463         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2464         encode_nops(&hdr);
2465         return 0;
2466 }
2467 #endif /* CONFIG_NFS_V4_1 */
2468
2469 /*
2470  * START OF "GENERIC" DECODE ROUTINES.
2471  *   These may look a little ugly since they are imported from a "generic"
2472  * set of XDR encode/decode routines which are intended to be shared by
2473  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2474  *
2475  * If the pain of reading these is too great, it should be a straightforward
2476  * task to translate them into Linux-specific versions which are more
2477  * consistent with the style used in NFSv2/v3...
2478  */
2479 #define READ32(x)         (x) = ntohl(*p++)
2480 #define READ64(x)         do {                  \
2481         (x) = (u64)ntohl(*p++) << 32;           \
2482         (x) |= ntohl(*p++);                     \
2483 } while (0)
2484 #define READTIME(x)       do {                  \
2485         p++;                                    \
2486         (x.tv_sec) = ntohl(*p++);               \
2487         (x.tv_nsec) = ntohl(*p++);              \
2488 } while (0)
2489 #define COPYMEM(x,nbytes) do {                  \
2490         memcpy((x), p, nbytes);                 \
2491         p += XDR_QUADLEN(nbytes);               \
2492 } while (0)
2493
2494 #define READ_BUF(nbytes)  do { \
2495         p = xdr_inline_decode(xdr, nbytes); \
2496         if (unlikely(!p)) { \
2497                 dprintk("nfs: %s: prematurely hit end of receive" \
2498                                 " buffer\n", __func__); \
2499                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2500                                 __func__, xdr->p, nbytes, xdr->end); \
2501                 return -EIO; \
2502         } \
2503 } while (0)
2504
2505 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2506 {
2507         __be32 *p;
2508
2509         READ_BUF(4);
2510         READ32(*len);
2511         READ_BUF(*len);
2512         *string = (char *)p;
2513         return 0;
2514 }
2515
2516 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2517 {
2518         __be32 *p;
2519
2520         READ_BUF(8);
2521         READ32(hdr->status);
2522         READ32(hdr->taglen);
2523
2524         READ_BUF(hdr->taglen + 4);
2525         hdr->tag = (char *)p;
2526         p += XDR_QUADLEN(hdr->taglen);
2527         READ32(hdr->nops);
2528         if (unlikely(hdr->nops < 1))
2529                 return nfs4_stat_to_errno(hdr->status);
2530         return 0;
2531 }
2532
2533 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2534 {
2535         __be32 *p;
2536         uint32_t opnum;
2537         int32_t nfserr;
2538
2539         READ_BUF(8);
2540         READ32(opnum);
2541         if (opnum != expected) {
2542                 dprintk("nfs: Server returned operation"
2543                         " %d but we issued a request for %d\n",
2544                                 opnum, expected);
2545                 return -EIO;
2546         }
2547         READ32(nfserr);
2548         if (nfserr != NFS_OK)
2549                 return nfs4_stat_to_errno(nfserr);
2550         return 0;
2551 }
2552
2553 /* Dummy routine */
2554 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2555 {
2556         __be32 *p;
2557         unsigned int strlen;
2558         char *str;
2559
2560         READ_BUF(12);
2561         return decode_opaque_inline(xdr, &strlen, &str);
2562 }
2563
2564 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2565 {
2566         uint32_t bmlen;
2567         __be32 *p;
2568
2569         READ_BUF(4);
2570         READ32(bmlen);
2571
2572         bitmap[0] = bitmap[1] = 0;
2573         READ_BUF((bmlen << 2));
2574         if (bmlen > 0) {
2575                 READ32(bitmap[0]);
2576                 if (bmlen > 1)
2577                         READ32(bitmap[1]);
2578         }
2579         return 0;
2580 }
2581
2582 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2583 {
2584         __be32 *p;
2585
2586         READ_BUF(4);
2587         READ32(*attrlen);
2588         *savep = xdr->p;
2589         return 0;
2590 }
2591
2592 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2593 {
2594         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2595                 decode_attr_bitmap(xdr, bitmask);
2596                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2597         } else
2598                 bitmask[0] = bitmask[1] = 0;
2599         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2600         return 0;
2601 }
2602
2603 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2604 {
2605         __be32 *p;
2606         int ret = 0;
2607
2608         *type = 0;
2609         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2610                 return -EIO;
2611         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2612                 READ_BUF(4);
2613                 READ32(*type);
2614                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2615                         dprintk("%s: bad type %d\n", __func__, *type);
2616                         return -EIO;
2617                 }
2618                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2619                 ret = NFS_ATTR_FATTR_TYPE;
2620         }
2621         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2622         return ret;
2623 }
2624
2625 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2626 {
2627         __be32 *p;
2628         int ret = 0;
2629
2630         *change = 0;
2631         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2632                 return -EIO;
2633         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2634                 READ_BUF(8);
2635                 READ64(*change);
2636                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2637                 ret = NFS_ATTR_FATTR_CHANGE;
2638         }
2639         dprintk("%s: change attribute=%Lu\n", __func__,
2640                         (unsigned long long)*change);
2641         return ret;
2642 }
2643
2644 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2645 {
2646         __be32 *p;
2647         int ret = 0;
2648
2649         *size = 0;
2650         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2651                 return -EIO;
2652         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2653                 READ_BUF(8);
2654                 READ64(*size);
2655                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2656                 ret = NFS_ATTR_FATTR_SIZE;
2657         }
2658         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2659         return ret;
2660 }
2661
2662 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2663 {
2664         __be32 *p;
2665
2666         *res = 0;
2667         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2668                 return -EIO;
2669         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2670                 READ_BUF(4);
2671                 READ32(*res);
2672                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2673         }
2674         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2675         return 0;
2676 }
2677
2678 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2679 {
2680         __be32 *p;
2681
2682         *res = 0;
2683         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2684                 return -EIO;
2685         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2686                 READ_BUF(4);
2687                 READ32(*res);
2688                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2689         }
2690         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2691         return 0;
2692 }
2693
2694 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2695 {
2696         __be32 *p;
2697         int ret = 0;
2698
2699         fsid->major = 0;
2700         fsid->minor = 0;
2701         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2702                 return -EIO;
2703         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2704                 READ_BUF(16);
2705                 READ64(fsid->major);
2706                 READ64(fsid->minor);
2707                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2708                 ret = NFS_ATTR_FATTR_FSID;
2709         }
2710         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2711                         (unsigned long long)fsid->major,
2712                         (unsigned long long)fsid->minor);
2713         return ret;
2714 }
2715
2716 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2717 {
2718         __be32 *p;
2719
2720         *res = 60;
2721         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2722                 return -EIO;
2723         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2724                 READ_BUF(4);
2725                 READ32(*res);
2726                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2727         }
2728         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2729         return 0;
2730 }
2731
2732 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2733 {
2734         __be32 *p;
2735
2736         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2737         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2738                 return -EIO;
2739         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2740                 READ_BUF(4);
2741                 READ32(*res);
2742                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2743         }
2744         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2745         return 0;
2746 }
2747
2748 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2749 {
2750         __be32 *p;
2751         int ret = 0;
2752
2753         *fileid = 0;
2754         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2755                 return -EIO;
2756         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2757                 READ_BUF(8);
2758                 READ64(*fileid);
2759                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2760                 ret = NFS_ATTR_FATTR_FILEID;
2761         }
2762         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2763         return ret;
2764 }
2765
2766 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2767 {
2768         __be32 *p;
2769         int ret = 0;
2770
2771         *fileid = 0;
2772         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2773                 return -EIO;
2774         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2775                 READ_BUF(8);
2776                 READ64(*fileid);
2777                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2778                 ret = NFS_ATTR_FATTR_FILEID;
2779         }
2780         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2781         return ret;
2782 }
2783
2784 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2785 {
2786         __be32 *p;
2787         int status = 0;
2788
2789         *res = 0;
2790         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2791                 return -EIO;
2792         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2793                 READ_BUF(8);
2794                 READ64(*res);
2795                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2796         }
2797         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2798         return status;
2799 }
2800
2801 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2802 {
2803         __be32 *p;
2804         int status = 0;
2805
2806         *res = 0;
2807         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2808                 return -EIO;
2809         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2810                 READ_BUF(8);
2811                 READ64(*res);
2812                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2813         }
2814         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2815         return status;
2816 }
2817
2818 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2819 {
2820         __be32 *p;
2821         int status = 0;
2822
2823         *res = 0;
2824         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2825                 return -EIO;
2826         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2827                 READ_BUF(8);
2828                 READ64(*res);
2829                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2830         }
2831         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2832         return status;
2833 }
2834
2835 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2836 {
2837         u32 n;
2838         __be32 *p;
2839         int status = 0;
2840
2841         READ_BUF(4);
2842         READ32(n);
2843         if (n == 0)
2844                 goto root_path;
2845         dprintk("path ");
2846         path->ncomponents = 0;
2847         while (path->ncomponents < n) {
2848                 struct nfs4_string *component = &path->components[path->ncomponents];
2849                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2850                 if (unlikely(status != 0))
2851                         goto out_eio;
2852                 if (path->ncomponents != n)
2853                         dprintk("/");
2854                 dprintk("%s", component->data);
2855                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2856                         path->ncomponents++;
2857                 else {
2858                         dprintk("cannot parse %d components in path\n", n);
2859                         goto out_eio;
2860                 }
2861         }
2862 out:
2863         dprintk("\n");
2864         return status;
2865 root_path:
2866 /* a root pathname is sent as a zero component4 */
2867         path->ncomponents = 1;
2868         path->components[0].len=0;
2869         path->components[0].data=NULL;
2870         dprintk("path /\n");
2871         goto out;
2872 out_eio:
2873         dprintk(" status %d", status);
2874         status = -EIO;
2875         goto out;
2876 }
2877
2878 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2879 {
2880         int n;
2881         __be32 *p;
2882         int status = -EIO;
2883
2884         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2885                 goto out;
2886         status = 0;
2887         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2888                 goto out;
2889         dprintk("%s: fsroot ", __func__);
2890         status = decode_pathname(xdr, &res->fs_path);
2891         if (unlikely(status != 0))
2892                 goto out;
2893         READ_BUF(4);
2894         READ32(n);
2895         if (n <= 0)
2896                 goto out_eio;
2897         res->nlocations = 0;
2898         while (res->nlocations < n) {
2899                 u32 m;
2900                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2901
2902                 READ_BUF(4);
2903                 READ32(m);
2904
2905                 loc->nservers = 0;
2906                 dprintk("%s: servers ", __func__);
2907                 while (loc->nservers < m) {
2908                         struct nfs4_string *server = &loc->servers[loc->nservers];
2909                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2910                         if (unlikely(status != 0))
2911                                 goto out_eio;
2912                         dprintk("%s ", server->data);
2913                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2914                                 loc->nservers++;
2915                         else {
2916                                 unsigned int i;
2917                                 dprintk("%s: using first %u of %u servers "
2918                                         "returned for location %u\n",
2919                                                 __func__,
2920                                                 NFS4_FS_LOCATION_MAXSERVERS,
2921                                                 m, res->nlocations);
2922                                 for (i = loc->nservers; i < m; i++) {
2923                                         unsigned int len;
2924                                         char *data;
2925                                         status = decode_opaque_inline(xdr, &len, &data);
2926                                         if (unlikely(status != 0))
2927                                                 goto out_eio;
2928                                 }
2929                         }
2930                 }
2931                 status = decode_pathname(xdr, &loc->rootpath);
2932                 if (unlikely(status != 0))
2933                         goto out_eio;
2934                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2935                         res->nlocations++;
2936         }
2937         if (res->nlocations != 0)
2938                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2939 out:
2940         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2941         return status;
2942 out_eio:
2943         status = -EIO;
2944         goto out;
2945 }
2946
2947 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2948 {
2949         __be32 *p;
2950         int status = 0;
2951
2952         *res = 0;
2953         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2954                 return -EIO;
2955         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2956                 READ_BUF(8);
2957                 READ64(*res);
2958                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2959         }
2960         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2961         return status;
2962 }
2963
2964 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2965 {
2966         __be32 *p;
2967         int status = 0;
2968
2969         *maxlink = 1;
2970         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2971                 return -EIO;
2972         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2973                 READ_BUF(4);
2974                 READ32(*maxlink);
2975                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2976         }
2977         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2978         return status;
2979 }
2980
2981 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2982 {
2983         __be32 *p;
2984         int status = 0;
2985
2986         *maxname = 1024;
2987         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2988                 return -EIO;
2989         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2990                 READ_BUF(4);
2991                 READ32(*maxname);
2992                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2993         }
2994         dprintk("%s: maxname=%u\n", __func__, *maxname);
2995         return status;
2996 }
2997
2998 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2999 {
3000         __be32 *p;
3001         int status = 0;
3002
3003         *res = 1024;
3004         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3005                 return -EIO;
3006         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3007                 uint64_t maxread;
3008                 READ_BUF(8);
3009                 READ64(maxread);
3010                 if (maxread > 0x7FFFFFFF)
3011                         maxread = 0x7FFFFFFF;
3012                 *res = (uint32_t)maxread;
3013                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3014         }
3015         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3016         return status;
3017 }
3018
3019 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3020 {
3021         __be32 *p;
3022         int status = 0;
3023
3024         *res = 1024;
3025         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3026                 return -EIO;
3027         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3028                 uint64_t maxwrite;
3029                 READ_BUF(8);
3030                 READ64(maxwrite);
3031                 if (maxwrite > 0x7FFFFFFF)
3032                         maxwrite = 0x7FFFFFFF;
3033                 *res = (uint32_t)maxwrite;
3034                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3035         }
3036         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3037         return status;
3038 }
3039
3040 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3041 {
3042         uint32_t tmp;
3043         __be32 *p;
3044         int ret = 0;
3045
3046         *mode = 0;
3047         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3048                 return -EIO;
3049         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3050                 READ_BUF(4);
3051                 READ32(tmp);
3052                 *mode = tmp & ~S_IFMT;
3053                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3054                 ret = NFS_ATTR_FATTR_MODE;
3055         }
3056         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3057         return ret;
3058 }
3059
3060 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3061 {
3062         __be32 *p;
3063         int ret = 0;
3064
3065         *nlink = 1;
3066         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3067                 return -EIO;
3068         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3069                 READ_BUF(4);
3070                 READ32(*nlink);
3071                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3072                 ret = NFS_ATTR_FATTR_NLINK;
3073         }
3074         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3075         return ret;
3076 }
3077
3078 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3079 {
3080         uint32_t len;
3081         __be32 *p;
3082         int ret = 0;
3083
3084         *uid = -2;
3085         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3086                 return -EIO;
3087         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3088                 READ_BUF(4);
3089                 READ32(len);
3090                 READ_BUF(len);
3091                 if (len < XDR_MAX_NETOBJ) {
3092                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3093                                 ret = NFS_ATTR_FATTR_OWNER;
3094                         else
3095                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3096                                                 __func__);
3097                 } else
3098                         dprintk("%s: name too long (%u)!\n",
3099                                         __func__, len);
3100                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3101         }
3102         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3103         return ret;
3104 }
3105
3106 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3107 {
3108         uint32_t len;
3109         __be32 *p;
3110         int ret = 0;
3111
3112         *gid = -2;
3113         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3114                 return -EIO;
3115         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3116                 READ_BUF(4);
3117                 READ32(len);
3118                 READ_BUF(len);
3119                 if (len < XDR_MAX_NETOBJ) {
3120                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3121                                 ret = NFS_ATTR_FATTR_GROUP;
3122                         else
3123                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3124                                                 __func__);
3125                 } else
3126                         dprintk("%s: name too long (%u)!\n",
3127                                         __func__, len);
3128                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3129         }
3130         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3131         return ret;
3132 }
3133
3134 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3135 {
3136         uint32_t major = 0, minor = 0;
3137         __be32 *p;
3138         int ret = 0;
3139
3140         *rdev = MKDEV(0,0);
3141         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3142                 return -EIO;
3143         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3144                 dev_t tmp;
3145
3146                 READ_BUF(8);
3147                 READ32(major);
3148                 READ32(minor);
3149                 tmp = MKDEV(major, minor);
3150                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3151                         *rdev = tmp;
3152                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3153                 ret = NFS_ATTR_FATTR_RDEV;
3154         }
3155         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3156         return ret;
3157 }
3158
3159 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3160 {
3161         __be32 *p;
3162         int status = 0;
3163
3164         *res = 0;
3165         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3166                 return -EIO;
3167         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3168                 READ_BUF(8);
3169                 READ64(*res);
3170                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3171         }
3172         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3173         return status;
3174 }
3175
3176 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3177 {
3178         __be32 *p;
3179         int status = 0;
3180
3181         *res = 0;
3182         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3183                 return -EIO;
3184         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3185                 READ_BUF(8);
3186                 READ64(*res);
3187                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3188         }
3189         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3190         return status;
3191 }
3192
3193 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3194 {
3195         __be32 *p;
3196         int status = 0;
3197
3198         *res = 0;
3199         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3200                 return -EIO;
3201         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3202                 READ_BUF(8);
3203                 READ64(*res);
3204                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3205         }
3206         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3207         return status;
3208 }
3209
3210 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3211 {
3212         __be32 *p;
3213         int ret = 0;
3214
3215         *used = 0;
3216         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3217                 return -EIO;
3218         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3219                 READ_BUF(8);
3220                 READ64(*used);
3221                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3222                 ret = NFS_ATTR_FATTR_SPACE_USED;
3223         }
3224         dprintk("%s: space used=%Lu\n", __func__,
3225                         (unsigned long long)*used);
3226         return ret;
3227 }
3228
3229 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3230 {
3231         __be32 *p;
3232         uint64_t sec;
3233         uint32_t nsec;
3234
3235         READ_BUF(12);
3236         READ64(sec);
3237         READ32(nsec);
3238         time->tv_sec = (time_t)sec;
3239         time->tv_nsec = (long)nsec;
3240         return 0;
3241 }
3242
3243 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3244 {
3245         int status = 0;
3246
3247         time->tv_sec = 0;
3248         time->tv_nsec = 0;
3249         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3250                 return -EIO;
3251         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3252                 status = decode_attr_time(xdr, time);
3253                 if (status == 0)
3254                         status = NFS_ATTR_FATTR_ATIME;
3255                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3256         }
3257         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3258         return status;
3259 }
3260
3261 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3262 {
3263         int status = 0;
3264
3265         time->tv_sec = 0;
3266         time->tv_nsec = 0;
3267         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3268                 return -EIO;
3269         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3270                 status = decode_attr_time(xdr, time);
3271                 if (status == 0)
3272                         status = NFS_ATTR_FATTR_CTIME;
3273                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3274         }
3275         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3276         return status;
3277 }
3278
3279 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3280 {
3281         int status = 0;
3282
3283         time->tv_sec = 0;
3284         time->tv_nsec = 0;
3285         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3286                 return -EIO;
3287         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3288                 status = decode_attr_time(xdr, time);
3289                 if (status == 0)
3290                         status = NFS_ATTR_FATTR_MTIME;
3291                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3292         }
3293         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3294         return status;
3295 }
3296
3297 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3298 {
3299         unsigned int attrwords = XDR_QUADLEN(attrlen);
3300         unsigned int nwords = xdr->p - savep;
3301
3302         if (unlikely(attrwords != nwords)) {
3303                 dprintk("%s: server returned incorrect attribute length: "
3304                         "%u %c %u\n",
3305                                 __func__,
3306                                 attrwords << 2,
3307                                 (attrwords < nwords) ? '<' : '>',
3308                                 nwords << 2);
3309                 return -EIO;
3310         }
3311         return 0;
3312 }
3313
3314 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3315 {
3316         __be32 *p;
3317
3318         READ_BUF(20);
3319         READ32(cinfo->atomic);
3320         READ64(cinfo->before);
3321         READ64(cinfo->after);
3322         return 0;
3323 }
3324
3325 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3326 {
3327         __be32 *p;
3328         uint32_t supp, acc;
3329         int status;
3330
3331         status = decode_op_hdr(xdr, OP_ACCESS);
3332         if (status)
3333                 return status;
3334         READ_BUF(8);
3335         READ32(supp);
3336         READ32(acc);
3337         access->supported = supp;
3338         access->access = acc;
3339         return 0;
3340 }
3341
3342 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3343 {
3344         __be32 *p;
3345         int status;
3346
3347         status = decode_op_hdr(xdr, OP_CLOSE);
3348         if (status != -EIO)
3349                 nfs_increment_open_seqid(status, res->seqid);
3350         if (status)
3351                 return status;
3352         READ_BUF(NFS4_STATEID_SIZE);
3353         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3354         return 0;
3355 }
3356
3357 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3358 {
3359         __be32 *p;
3360         int status;
3361
3362         status = decode_op_hdr(xdr, OP_COMMIT);
3363         if (status)
3364                 return status;
3365         READ_BUF(8);
3366         COPYMEM(res->verf->verifier, 8);
3367         return 0;
3368 }
3369
3370 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3371 {
3372         __be32 *p;
3373         uint32_t bmlen;
3374         int status;
3375
3376         status = decode_op_hdr(xdr, OP_CREATE);
3377         if (status)
3378                 return status;
3379         if ((status = decode_change_info(xdr, cinfo)))
3380                 return status;
3381         READ_BUF(4);
3382         READ32(bmlen);
3383         READ_BUF(bmlen << 2);
3384         return 0;
3385 }
3386
3387 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3388 {
3389         __be32 *savep;
3390         uint32_t attrlen, bitmap[2] = {0};
3391         int status;
3392
3393         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3394                 goto xdr_error;
3395         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3396                 goto xdr_error;
3397         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3398                 goto xdr_error;
3399         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3400                 goto xdr_error;
3401         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3402                 goto xdr_error;
3403         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3404                 goto xdr_error;
3405         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3406                 goto xdr_error;
3407         status = verify_attr_len(xdr, savep, attrlen);
3408 xdr_error:
3409         dprintk("%s: xdr returned %d!\n", __func__, -status);
3410         return status;
3411 }
3412
3413 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3414 {
3415         __be32 *savep;
3416         uint32_t attrlen, bitmap[2] = {0};
3417         int status;
3418
3419         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3420                 goto xdr_error;
3421         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3422                 goto xdr_error;
3423         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3424                 goto xdr_error;
3425
3426         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3427                 goto xdr_error;
3428         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3429                 goto xdr_error;
3430         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3431                 goto xdr_error;
3432         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3433                 goto xdr_error;
3434         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3435                 goto xdr_error;
3436         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3437                 goto xdr_error;
3438
3439         status = verify_attr_len(xdr, savep, attrlen);
3440 xdr_error:
3441         dprintk("%s: xdr returned %d!\n", __func__, -status);
3442         return status;
3443 }
3444
3445 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3446 {
3447         __be32 *savep;
3448         uint32_t attrlen, bitmap[2] = {0};
3449         int status;
3450
3451         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3452                 goto xdr_error;
3453         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3454                 goto xdr_error;
3455         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3456                 goto xdr_error;
3457
3458         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3459                 goto xdr_error;
3460         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3461                 goto xdr_error;
3462
3463         status = verify_attr_len(xdr, savep, attrlen);
3464 xdr_error:
3465         dprintk("%s: xdr returned %d!\n", __func__, -status);
3466         return status;
3467 }
3468
3469 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3470 {
3471         __be32 *savep;
3472         uint32_t attrlen,
3473                  bitmap[2] = {0},
3474                  type;
3475         int status;
3476         umode_t fmode = 0;
3477         uint64_t fileid;
3478
3479         status = decode_op_hdr(xdr, OP_GETATTR);
3480         if (status < 0)
3481                 goto xdr_error;
3482
3483         status = decode_attr_bitmap(xdr, bitmap);
3484         if (status < 0)
3485                 goto xdr_error;
3486
3487         status = decode_attr_length(xdr, &attrlen, &savep);
3488         if (status < 0)
3489                 goto xdr_error;
3490
3491
3492         status = decode_attr_type(xdr, bitmap, &type);
3493         if (status < 0)
3494                 goto xdr_error;
3495         fattr->mode = 0;
3496         if (status != 0) {
3497                 fattr->mode |= nfs_type2fmt[type];
3498                 fattr->valid |= status;
3499         }
3500
3501         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3502         if (status < 0)
3503                 goto xdr_error;
3504         fattr->valid |= status;
3505
3506         status = decode_attr_size(xdr, bitmap, &fattr->size);
3507         if (status < 0)
3508                 goto xdr_error;
3509         fattr->valid |= status;
3510
3511         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3512         if (status < 0)
3513                 goto xdr_error;
3514         fattr->valid |= status;
3515
3516         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3517         if (status < 0)
3518                 goto xdr_error;
3519         fattr->valid |= status;
3520
3521         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3522                                                 struct nfs4_fs_locations,
3523                                                 fattr));
3524         if (status < 0)
3525                 goto xdr_error;
3526         fattr->valid |= status;
3527
3528         status = decode_attr_mode(xdr, bitmap, &fmode);
3529         if (status < 0)
3530                 goto xdr_error;
3531         if (status != 0) {
3532                 fattr->mode |= fmode;
3533                 fattr->valid |= status;
3534         }
3535
3536         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3537         if (status < 0)
3538                 goto xdr_error;
3539         fattr->valid |= status;
3540
3541         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3542         if (status < 0)
3543                 goto xdr_error;
3544         fattr->valid |= status;
3545
3546         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3547         if (status < 0)
3548                 goto xdr_error;
3549         fattr->valid |= status;
3550
3551         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3552         if (status < 0)
3553                 goto xdr_error;
3554         fattr->valid |= status;
3555
3556         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3557         if (status < 0)
3558                 goto xdr_error;
3559         fattr->valid |= status;
3560
3561         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3562         if (status < 0)
3563                 goto xdr_error;
3564         fattr->valid |= status;
3565
3566         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3567         if (status < 0)
3568                 goto xdr_error;
3569         fattr->valid |= status;
3570
3571         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3572         if (status < 0)
3573                 goto xdr_error;
3574         fattr->valid |= status;
3575
3576         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3577         if (status < 0)
3578                 goto xdr_error;
3579         if (status != 0 && !(fattr->valid & status)) {
3580                 fattr->fileid = fileid;
3581                 fattr->valid |= status;
3582         }
3583
3584         status = verify_attr_len(xdr, savep, attrlen);
3585 xdr_error:
3586         dprintk("%s: xdr returned %d\n", __func__, -status);
3587         return status;
3588 }
3589
3590
3591 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3592 {
3593         __be32 *savep;
3594         uint32_t attrlen, bitmap[2];
3595         int status;
3596
3597         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3598                 goto xdr_error;
3599         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3600                 goto xdr_error;
3601         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3602                 goto xdr_error;
3603
3604         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3605
3606         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3607                 goto xdr_error;
3608         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3609                 goto xdr_error;
3610         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3611                 goto xdr_error;
3612         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3613         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3614                 goto xdr_error;
3615         fsinfo->wtpref = fsinfo->wtmax;
3616
3617         status = verify_attr_len(xdr, savep, attrlen);
3618 xdr_error:
3619         dprintk("%s: xdr returned %d!\n", __func__, -status);
3620         return status;
3621 }
3622
3623 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3624 {
3625         __be32 *p;
3626         uint32_t len;
3627         int status;
3628
3629         /* Zero handle first to allow comparisons */
3630         memset(fh, 0, sizeof(*fh));
3631
3632         status = decode_op_hdr(xdr, OP_GETFH);
3633         if (status)
3634                 return status;
3635
3636         READ_BUF(4);
3637         READ32(len);
3638         if (len > NFS4_FHSIZE)
3639                 return -EIO;
3640         fh->size = len;
3641         READ_BUF(len);
3642         COPYMEM(fh->data, len);
3643         return 0;
3644 }
3645
3646 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3647 {
3648         int status;
3649
3650         status = decode_op_hdr(xdr, OP_LINK);
3651         if (status)
3652                 return status;
3653         return decode_change_info(xdr, cinfo);
3654 }
3655
3656 /*
3657  * We create the owner, so we know a proper owner.id length is 4.
3658  */
3659 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3660 {
3661         uint64_t offset, length, clientid;
3662         __be32 *p;
3663         uint32_t namelen, type;
3664
3665         READ_BUF(32);
3666         READ64(offset);
3667         READ64(length);
3668         READ32(type);
3669         if (fl != NULL) {
3670                 fl->fl_start = (loff_t)offset;
3671                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3672                 if (length == ~(uint64_t)0)
3673                         fl->fl_end = OFFSET_MAX;
3674                 fl->fl_type = F_WRLCK;
3675                 if (type & 1)
3676                         fl->fl_type = F_RDLCK;
3677                 fl->fl_pid = 0;
3678         }
3679         READ64(clientid);
3680         READ32(namelen);
3681         READ_BUF(namelen);
3682         return -NFS4ERR_DENIED;
3683 }
3684
3685 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3686 {
3687         __be32 *p;
3688         int status;
3689
3690         status = decode_op_hdr(xdr, OP_LOCK);
3691         if (status == -EIO)
3692                 goto out;
3693         if (status == 0) {
3694                 READ_BUF(NFS4_STATEID_SIZE);
3695                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3696         } else if (status == -NFS4ERR_DENIED)
3697                 status = decode_lock_denied(xdr, NULL);
3698         if (res->open_seqid != NULL)
3699                 nfs_increment_open_seqid(status, res->open_seqid);
3700         nfs_increment_lock_seqid(status, res->lock_seqid);
3701 out:
3702         return status;
3703 }
3704
3705 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3706 {
3707         int status;
3708         status = decode_op_hdr(xdr, OP_LOCKT);
3709         if (status == -NFS4ERR_DENIED)
3710                 return decode_lock_denied(xdr, res->denied);
3711         return status;
3712 }
3713
3714 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3715 {
3716         __be32 *p;
3717         int status;
3718
3719         status = decode_op_hdr(xdr, OP_LOCKU);
3720         if (status != -EIO)
3721                 nfs_increment_lock_seqid(status, res->seqid);
3722         if (status == 0) {
3723                 READ_BUF(NFS4_STATEID_SIZE);
3724                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3725         }
3726         return status;
3727 }
3728
3729 static int decode_lookup(struct xdr_stream *xdr)
3730 {
3731         return decode_op_hdr(xdr, OP_LOOKUP);
3732 }
3733
3734 /* This is too sick! */
3735 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3736 {
3737         __be32 *p;
3738         uint32_t limit_type, nblocks, blocksize;
3739
3740         READ_BUF(12);
3741         READ32(limit_type);
3742         switch (limit_type) {
3743         case 1:
3744                 READ64(*maxsize);
3745                 break;
3746         case 2:
3747                 READ32(nblocks);
3748                 READ32(blocksize);
3749                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3750         }
3751         return 0;
3752 }
3753
3754 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3755 {
3756         __be32 *p;
3757         uint32_t delegation_type;
3758
3759         READ_BUF(4);
3760         READ32(delegation_type);
3761         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3762                 res->delegation_type = 0;
3763                 return 0;
3764         }
3765         READ_BUF(NFS4_STATEID_SIZE+4);
3766         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3767         READ32(res->do_recall);
3768
3769         switch (delegation_type) {
3770         case NFS4_OPEN_DELEGATE_READ:
3771                 res->delegation_type = FMODE_READ;
3772                 break;
3773         case NFS4_OPEN_DELEGATE_WRITE:
3774                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3775                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3776                                 return -EIO;
3777         }
3778         return decode_ace(xdr, NULL, res->server->nfs_client);
3779 }
3780
3781 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3782 {
3783         __be32 *p;
3784         uint32_t savewords, bmlen, i;
3785         int status;
3786
3787         status = decode_op_hdr(xdr, OP_OPEN);
3788         if (status != -EIO)
3789                 nfs_increment_open_seqid(status, res->seqid);
3790         if (status)
3791                 return status;
3792         READ_BUF(NFS4_STATEID_SIZE);
3793         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3794
3795         decode_change_info(xdr, &res->cinfo);
3796
3797         READ_BUF(8);
3798         READ32(res->rflags);
3799         READ32(bmlen);
3800         if (bmlen > 10)
3801                 goto xdr_error;
3802
3803         READ_BUF(bmlen << 2);
3804         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3805         for (i = 0; i < savewords; ++i)
3806                 READ32(res->attrset[i]);
3807         for (; i < NFS4_BITMAP_SIZE; i++)
3808                 res->attrset[i] = 0;
3809
3810         return decode_delegation(xdr, res);
3811 xdr_error:
3812         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3813         return -EIO;
3814 }
3815
3816 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3817 {
3818         __be32 *p;
3819         int status;
3820
3821         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3822         if (status != -EIO)
3823                 nfs_increment_open_seqid(status, res->seqid);
3824         if (status)
3825                 return status;
3826         READ_BUF(NFS4_STATEID_SIZE);
3827         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3828         return 0;
3829 }
3830
3831 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3832 {
3833         __be32 *p;
3834         int status;
3835
3836         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3837         if (status != -EIO)
3838                 nfs_increment_open_seqid(status, res->seqid);
3839         if (status)
3840                 return status;
3841         READ_BUF(NFS4_STATEID_SIZE);
3842         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3843         return 0;
3844 }
3845
3846 static int decode_putfh(struct xdr_stream *xdr)
3847 {
3848         return decode_op_hdr(xdr, OP_PUTFH);
3849 }
3850
3851 static int decode_putrootfh(struct xdr_stream *xdr)
3852 {
3853         return decode_op_hdr(xdr, OP_PUTROOTFH);
3854 }
3855
3856 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3857 {
3858         struct kvec *iov = req->rq_rcv_buf.head;
3859         __be32 *p;
3860         uint32_t count, eof, recvd, hdrlen;
3861         int status;
3862
3863         status = decode_op_hdr(xdr, OP_READ);
3864         if (status)
3865                 return status;
3866         READ_BUF(8);
3867         READ32(eof);
3868         READ32(count);
3869         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3870         recvd = req->rq_rcv_buf.len - hdrlen;
3871         if (count > recvd) {
3872                 dprintk("NFS: server cheating in read reply: "
3873                                 "count %u > recvd %u\n", count, recvd);
3874                 count = recvd;
3875                 eof = 0;
3876         }
3877         xdr_read_pages(xdr, count);
3878         res->eof = eof;
3879         res->count = count;
3880         return 0;
3881 }
3882
3883 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3884 {
3885         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3886         struct page     *page = *rcvbuf->pages;
3887         struct kvec     *iov = rcvbuf->head;
3888         size_t          hdrlen;
3889         u32             recvd, pglen = rcvbuf->page_len;
3890         __be32          *end, *entry, *p, *kaddr;
3891         unsigned int    nr = 0;
3892         int             status;
3893
3894         status = decode_op_hdr(xdr, OP_READDIR);
3895         if (status)
3896                 return status;
3897         READ_BUF(8);
3898         COPYMEM(readdir->verifier.data, 8);
3899         dprintk("%s: verifier = %08x:%08x\n",
3900                         __func__,
3901                         ((u32 *)readdir->verifier.data)[0],
3902                         ((u32 *)readdir->verifier.data)[1]);
3903
3904
3905         hdrlen = (char *) p - (char *) iov->iov_base;
3906         recvd = rcvbuf->len - hdrlen;
3907         if (pglen > recvd)
3908                 pglen = recvd;
3909         xdr_read_pages(xdr, pglen);
3910
3911         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3912         kaddr = p = kmap_atomic(page, KM_USER0);
3913         end = p + ((pglen + readdir->pgbase) >> 2);
3914         entry = p;
3915
3916         /* Make sure the packet actually has a value_follows and EOF entry */
3917         if ((entry + 1) > end)
3918                 goto short_pkt;
3919
3920         for (; *p++; nr++) {
3921                 u32 len, attrlen, xlen;
3922                 if (end - p < 3)
3923                         goto short_pkt;
3924                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3925                 p += 2;                 /* cookie */
3926                 len = ntohl(*p++);      /* filename length */
3927                 if (len > NFS4_MAXNAMLEN) {
3928                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3929                                         len);
3930                         goto err_unmap;
3931                 }
3932                 xlen = XDR_QUADLEN(len);
3933                 if (end - p < xlen + 1)
3934                         goto short_pkt;
3935                 dprintk("filename = %*s\n", len, (char *)p);
3936                 p += xlen;
3937                 len = ntohl(*p++);      /* bitmap length */
3938                 if (end - p < len + 1)
3939                         goto short_pkt;
3940                 p += len;
3941                 attrlen = XDR_QUADLEN(ntohl(*p++));
3942                 if (end - p < attrlen + 2)
3943                         goto short_pkt;
3944                 p += attrlen;           /* attributes */
3945                 entry = p;
3946         }
3947         /*
3948          * Apparently some server sends responses that are a valid size, but
3949          * contain no entries, and have value_follows==0 and EOF==0. For
3950          * those, just set the EOF marker.
3951          */
3952         if (!nr && entry[1] == 0) {
3953                 dprintk("NFS: readdir reply truncated!\n");
3954                 entry[1] = 1;
3955         }
3956 out:
3957         kunmap_atomic(kaddr, KM_USER0);
3958         return 0;
3959 short_pkt:
3960         /*
3961          * When we get a short packet there are 2 possibilities. We can
3962          * return an error, or fix up the response to look like a valid
3963          * response and return what we have so far. If there are no
3964          * entries and the packet was short, then return -EIO. If there
3965          * are valid entries in the response, return them and pretend that
3966          * the call was successful, but incomplete. The caller can retry the
3967          * readdir starting at the last cookie.
3968          */
3969         dprintk("%s: short packet at entry %d\n", __func__, nr);
3970         entry[0] = entry[1] = 0;
3971         if (nr)
3972                 goto out;
3973 err_unmap:
3974         kunmap_atomic(kaddr, KM_USER0);
3975         return -errno_NFSERR_IO;
3976 }
3977
3978 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3979 {
3980         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3981         struct kvec *iov = rcvbuf->head;
3982         size_t hdrlen;
3983         u32 len, recvd;
3984         __be32 *p;
3985         char *kaddr;
3986         int status;
3987
3988         status = decode_op_hdr(xdr, OP_READLINK);
3989         if (status)
3990                 return status;
3991
3992         /* Convert length of symlink */
3993         READ_BUF(4);
3994         READ32(len);
3995         if (len >= rcvbuf->page_len || len <= 0) {
3996                 dprintk("nfs: server returned giant symlink!\n");
3997                 return -ENAMETOOLONG;
3998         }
3999         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4000         recvd = req->rq_rcv_buf.len - hdrlen;
4001         if (recvd < len) {
4002                 dprintk("NFS: server cheating in readlink reply: "
4003                                 "count %u > recvd %u\n", len, recvd);
4004                 return -EIO;
4005         }
4006         xdr_read_pages(xdr, len);
4007         /*
4008          * The XDR encode routine has set things up so that
4009          * the link text will be copied directly into the
4010          * buffer.  We just have to do overflow-checking,
4011          * and and null-terminate the text (the VFS expects
4012          * null-termination).
4013          */
4014         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4015         kaddr[len+rcvbuf->page_base] = '\0';
4016         kunmap_atomic(kaddr, KM_USER0);
4017         return 0;
4018 }
4019
4020 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4021 {
4022         int status;
4023
4024         status = decode_op_hdr(xdr, OP_REMOVE);
4025         if (status)
4026                 goto out;
4027         status = decode_change_info(xdr, cinfo);
4028 out:
4029         return status;
4030 }
4031
4032 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4033               struct nfs4_change_info *new_cinfo)
4034 {
4035         int status;
4036
4037         status = decode_op_hdr(xdr, OP_RENAME);
4038         if (status)
4039                 goto out;
4040         if ((status = decode_change_info(xdr, old_cinfo)))
4041                 goto out;
4042         status = decode_change_info(xdr, new_cinfo);
4043 out:
4044         return status;
4045 }
4046
4047 static int decode_renew(struct xdr_stream *xdr)
4048 {
4049         return decode_op_hdr(xdr, OP_RENEW);
4050 }
4051
4052 static int
4053 decode_restorefh(struct xdr_stream *xdr)
4054 {
4055         return decode_op_hdr(xdr, OP_RESTOREFH);
4056 }
4057
4058 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4059                 size_t *acl_len)
4060 {
4061         __be32 *savep;
4062         uint32_t attrlen,
4063                  bitmap[2] = {0};
4064         struct kvec *iov = req->rq_rcv_buf.head;
4065         int status;
4066
4067         *acl_len = 0;
4068         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4069                 goto out;
4070         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4071                 goto out;
4072         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4073                 goto out;
4074
4075         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4076                 return -EIO;
4077         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4078                 size_t hdrlen;
4079                 u32 recvd;
4080
4081                 /* We ignore &savep and don't do consistency checks on
4082                  * the attr length.  Let userspace figure it out.... */
4083                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4084                 recvd = req->rq_rcv_buf.len - hdrlen;
4085                 if (attrlen > recvd) {
4086                         dprintk("NFS: server cheating in getattr"
4087                                         " acl reply: attrlen %u > recvd %u\n",
4088                                         attrlen, recvd);
4089                         return -EINVAL;
4090                 }
4091                 xdr_read_pages(xdr, attrlen);
4092                 *acl_len = attrlen;
4093         } else
4094                 status = -EOPNOTSUPP;
4095
4096 out:
4097         return status;
4098 }
4099
4100 static int
4101 decode_savefh(struct xdr_stream *xdr)
4102 {
4103         return decode_op_hdr(xdr, OP_SAVEFH);
4104 }
4105
4106 static int decode_setattr(struct xdr_stream *xdr)
4107 {
4108         __be32 *p;
4109         uint32_t bmlen;
4110         int status;
4111
4112         status = decode_op_hdr(xdr, OP_SETATTR);
4113         if (status)
4114                 return status;
4115         READ_BUF(4);
4116         READ32(bmlen);
4117         READ_BUF(bmlen << 2);
4118         return 0;
4119 }
4120
4121 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4122 {
4123         __be32 *p;
4124         uint32_t opnum;
4125         int32_t nfserr;
4126
4127         READ_BUF(8);
4128         READ32(opnum);
4129         if (opnum != OP_SETCLIENTID) {
4130                 dprintk("nfs: decode_setclientid: Server returned operation"
4131                         " %d\n", opnum);
4132                 return -EIO;
4133         }
4134         READ32(nfserr);
4135         if (nfserr == NFS_OK) {
4136                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4137                 READ64(clp->cl_clientid);
4138                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4139         } else if (nfserr == NFSERR_CLID_INUSE) {
4140                 uint32_t len;
4141
4142                 /* skip netid string */
4143                 READ_BUF(4);
4144                 READ32(len);
4145                 READ_BUF(len);
4146
4147                 /* skip uaddr string */
4148                 READ_BUF(4);
4149                 READ32(len);
4150                 READ_BUF(len);
4151                 return -NFSERR_CLID_INUSE;
4152         } else
4153                 return nfs4_stat_to_errno(nfserr);
4154
4155         return 0;
4156 }
4157
4158 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4159 {
4160         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4161 }
4162
4163 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4164 {
4165         __be32 *p;
4166         int status;
4167
4168         status = decode_op_hdr(xdr, OP_WRITE);
4169         if (status)
4170                 return status;
4171
4172         READ_BUF(16);
4173         READ32(res->count);
4174         READ32(res->verf->committed);
4175         COPYMEM(res->verf->verifier, 8);
4176         return 0;
4177 }
4178
4179 static int decode_delegreturn(struct xdr_stream *xdr)
4180 {
4181         return decode_op_hdr(xdr, OP_DELEGRETURN);
4182 }
4183
4184 #if defined(CONFIG_NFS_V4_1)
4185 static int decode_exchange_id(struct xdr_stream *xdr,
4186                               struct nfs41_exchange_id_res *res)
4187 {
4188         __be32 *p;
4189         uint32_t dummy;
4190         int status;
4191         struct nfs_client *clp = res->client;
4192
4193         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4194         if (status)
4195                 return status;
4196
4197         READ_BUF(8);
4198         READ64(clp->cl_ex_clid);
4199         READ_BUF(12);
4200         READ32(clp->cl_seqid);
4201         READ32(clp->cl_exchange_flags);
4202
4203         /* We ask for SP4_NONE */
4204         READ32(dummy);
4205         if (dummy != SP4_NONE)
4206                 return -EIO;
4207
4208         /* Throw away minor_id */
4209         READ_BUF(8);
4210
4211         /* Throw away Major id */
4212         READ_BUF(4);
4213         READ32(dummy);
4214         READ_BUF(dummy);
4215
4216         /* Throw away server_scope */
4217         READ_BUF(4);
4218         READ32(dummy);
4219         READ_BUF(dummy);
4220
4221         /* Throw away Implementation id array */
4222         READ_BUF(4);
4223         READ32(dummy);
4224         READ_BUF(dummy);
4225
4226         return 0;
4227 }
4228
4229 static int decode_chan_attrs(struct xdr_stream *xdr,
4230                              struct nfs4_channel_attrs *attrs)
4231 {
4232         __be32 *p;
4233         u32 nr_attrs;
4234
4235         READ_BUF(28);
4236         READ32(attrs->headerpadsz);
4237         READ32(attrs->max_rqst_sz);
4238         READ32(attrs->max_resp_sz);
4239         READ32(attrs->max_resp_sz_cached);
4240         READ32(attrs->max_ops);
4241         READ32(attrs->max_reqs);
4242         READ32(nr_attrs);
4243         if (unlikely(nr_attrs > 1)) {
4244                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4245                         __func__, nr_attrs);
4246                 return -EINVAL;
4247         }
4248         if (nr_attrs == 1)
4249                 READ_BUF(4); /* skip rdma_attrs */
4250         return 0;
4251 }
4252
4253 static int decode_create_session(struct xdr_stream *xdr,
4254                                  struct nfs41_create_session_res *res)
4255 {
4256         __be32 *p;
4257         int status;
4258         struct nfs_client *clp = res->client;
4259         struct nfs4_session *session = clp->cl_session;
4260
4261         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4262
4263         if (status)
4264                 return status;
4265
4266         /* sessionid */
4267         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4268         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4269
4270         /* seqid, flags */
4271         READ_BUF(8);
4272         READ32(clp->cl_seqid);
4273         READ32(session->flags);
4274
4275         /* Channel attributes */
4276         status = decode_chan_attrs(xdr, &session->fc_attrs);
4277         if (!status)
4278                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4279         return status;
4280 }
4281
4282 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4283 {
4284         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4285 }
4286 #endif /* CONFIG_NFS_V4_1 */
4287
4288 static int decode_sequence(struct xdr_stream *xdr,
4289                            struct nfs4_sequence_res *res,
4290                            struct rpc_rqst *rqstp)
4291 {
4292 #if defined(CONFIG_NFS_V4_1)
4293         struct nfs4_slot *slot;
4294         struct nfs4_sessionid id;
4295         u32 dummy;
4296         int status;
4297         __be32 *p;
4298
4299         if (!res->sr_session)
4300                 return 0;
4301
4302         status = decode_op_hdr(xdr, OP_SEQUENCE);
4303         if (status)
4304                 goto out_err;
4305
4306         /*
4307          * If the server returns different values for sessionID, slotID or
4308          * sequence number, the server is looney tunes.
4309          */
4310         status = -ESERVERFAULT;
4311
4312         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4313         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4314         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4315         if (memcmp(id.data, res->sr_session->sess_id.data,
4316                    NFS4_MAX_SESSIONID_LEN)) {
4317                 dprintk("%s Invalid session id\n", __func__);
4318                 goto out_err;
4319         }
4320         /* seqid */
4321         READ32(dummy);
4322         if (dummy != slot->seq_nr) {
4323                 dprintk("%s Invalid sequence number\n", __func__);
4324                 goto out_err;
4325         }
4326         /* slot id */
4327         READ32(dummy);
4328         if (dummy != res->sr_slotid) {
4329                 dprintk("%s Invalid slot id\n", __func__);
4330                 goto out_err;
4331         }
4332         /* highest slot id - currently not processed */
4333         READ32(dummy);
4334         /* target highest slot id - currently not processed */
4335         READ32(dummy);
4336         /* result flags - currently not processed */
4337         READ32(dummy);
4338         status = 0;
4339 out_err:
4340         res->sr_status = status;
4341         return status;
4342 #else  /* CONFIG_NFS_V4_1 */
4343         return 0;
4344 #endif /* CONFIG_NFS_V4_1 */
4345 }
4346
4347 /*
4348  * END OF "GENERIC" DECODE ROUTINES.
4349  */
4350
4351 /*
4352  * Decode OPEN_DOWNGRADE response
4353  */
4354 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4355 {
4356         struct xdr_stream xdr;
4357         struct compound_hdr hdr;
4358         int status;
4359
4360         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4361         status = decode_compound_hdr(&xdr, &hdr);
4362         if (status)
4363                 goto out;
4364         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4365         if (status)
4366                 goto out;
4367         status = decode_putfh(&xdr);
4368         if (status)
4369                 goto out;
4370         status = decode_open_downgrade(&xdr, res);
4371         if (status != 0)
4372                 goto out;
4373         decode_getfattr(&xdr, res->fattr, res->server);
4374 out:
4375         return status;
4376 }
4377
4378 /*
4379  * Decode ACCESS response
4380  */
4381 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4382 {
4383         struct xdr_stream xdr;
4384         struct compound_hdr hdr;
4385         int status;
4386
4387         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4388         status = decode_compound_hdr(&xdr, &hdr);
4389         if (status)
4390                 goto out;
4391         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4392         if (status)
4393                 goto out;
4394         status = decode_putfh(&xdr);
4395         if (status != 0)
4396                 goto out;
4397         status = decode_access(&xdr, res);
4398         if (status != 0)
4399                 goto out;
4400         decode_getfattr(&xdr, res->fattr, res->server);
4401 out:
4402         return status;
4403 }
4404
4405 /*
4406  * Decode LOOKUP response
4407  */
4408 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4409 {
4410         struct xdr_stream xdr;
4411         struct compound_hdr hdr;
4412         int status;
4413
4414         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4415         status = decode_compound_hdr(&xdr, &hdr);
4416         if (status)
4417                 goto out;
4418         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4419         if (status)
4420                 goto out;
4421         if ((status = decode_putfh(&xdr)) != 0)
4422                 goto out;
4423         if ((status = decode_lookup(&xdr)) != 0)
4424                 goto out;
4425         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4426                 goto out;
4427         status = decode_getfattr(&xdr, res->fattr, res->server);
4428 out:
4429         return status;
4430 }
4431
4432 /*
4433  * Decode LOOKUP_ROOT response
4434  */
4435 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4436 {
4437         struct xdr_stream xdr;
4438         struct compound_hdr hdr;
4439         int status;
4440
4441         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4442         status = decode_compound_hdr(&xdr, &hdr);
4443         if (status)
4444                 goto out;
4445         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4446         if (status)
4447                 goto out;
4448         if ((status = decode_putrootfh(&xdr)) != 0)
4449                 goto out;
4450         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4451                 status = decode_getfattr(&xdr, res->fattr, res->server);
4452 out:
4453         return status;
4454 }
4455
4456 /*
4457  * Decode REMOVE response
4458  */
4459 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4460 {
4461         struct xdr_stream xdr;
4462         struct compound_hdr hdr;
4463         int status;
4464
4465         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4466         status = decode_compound_hdr(&xdr, &hdr);
4467         if (status)
4468                 goto out;
4469         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4470         if (status)
4471                 goto out;
4472         if ((status = decode_putfh(&xdr)) != 0)
4473                 goto out;
4474         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4475                 goto out;
4476         decode_getfattr(&xdr, &res->dir_attr, res->server);
4477 out:
4478         return status;
4479 }
4480
4481 /*
4482  * Decode RENAME response
4483  */
4484 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4485 {
4486         struct xdr_stream xdr;
4487         struct compound_hdr hdr;
4488         int status;
4489
4490         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4491         status = decode_compound_hdr(&xdr, &hdr);
4492         if (status)
4493                 goto out;
4494         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4495         if (status)
4496                 goto out;
4497         if ((status = decode_putfh(&xdr)) != 0)
4498                 goto out;
4499         if ((status = decode_savefh(&xdr)) != 0)
4500                 goto out;
4501         if ((status = decode_putfh(&xdr)) != 0)
4502                 goto out;
4503         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4504                 goto out;
4505         /* Current FH is target directory */
4506         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4507                 goto out;
4508         if ((status = decode_restorefh(&xdr)) != 0)
4509                 goto out;
4510         decode_getfattr(&xdr, res->old_fattr, res->server);
4511 out:
4512         return status;
4513 }
4514
4515 /*
4516  * Decode LINK response
4517  */
4518 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4519 {
4520         struct xdr_stream xdr;
4521         struct compound_hdr hdr;
4522         int status;
4523
4524         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4525         status = decode_compound_hdr(&xdr, &hdr);
4526         if (status)
4527                 goto out;
4528         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4529         if (status)
4530                 goto out;
4531         if ((status = decode_putfh(&xdr)) != 0)
4532                 goto out;
4533         if ((status = decode_savefh(&xdr)) != 0)
4534                 goto out;
4535         if ((status = decode_putfh(&xdr)) != 0)
4536                 goto out;
4537         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4538                 goto out;
4539         /*
4540          * Note order: OP_LINK leaves the directory as the current
4541          *             filehandle.
4542          */
4543         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4544                 goto out;
4545         if ((status = decode_restorefh(&xdr)) != 0)
4546                 goto out;
4547         decode_getfattr(&xdr, res->fattr, res->server);
4548 out:
4549         return status;
4550 }
4551
4552 /*
4553  * Decode CREATE response
4554  */
4555 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4556 {
4557         struct xdr_stream xdr;
4558         struct compound_hdr hdr;
4559         int status;
4560
4561         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4562         status = decode_compound_hdr(&xdr, &hdr);
4563         if (status)
4564                 goto out;
4565         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4566         if (status)
4567                 goto out;
4568         if ((status = decode_putfh(&xdr)) != 0)
4569                 goto out;
4570         if ((status = decode_savefh(&xdr)) != 0)
4571                 goto out;
4572         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4573                 goto out;
4574         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4575                 goto out;
4576         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4577                 goto out;
4578         if ((status = decode_restorefh(&xdr)) != 0)
4579                 goto out;
4580         decode_getfattr(&xdr, res->dir_fattr, res->server);
4581 out:
4582         return status;
4583 }
4584
4585 /*
4586  * Decode SYMLINK response
4587  */
4588 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4589 {
4590         return nfs4_xdr_dec_create(rqstp, p, res);
4591 }
4592
4593 /*
4594  * Decode GETATTR response
4595  */
4596 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4597 {
4598         struct xdr_stream xdr;
4599         struct compound_hdr hdr;
4600         int status;
4601
4602         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4603         status = decode_compound_hdr(&xdr, &hdr);
4604         if (status)
4605                 goto out;
4606         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4607         if (status)
4608                 goto out;
4609         status = decode_putfh(&xdr);
4610         if (status)
4611                 goto out;
4612         status = decode_getfattr(&xdr, res->fattr, res->server);
4613 out:
4614         return status;
4615 }
4616
4617 /*
4618  * Encode an SETACL request
4619  */
4620 static int
4621 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4622 {
4623         struct xdr_stream xdr;
4624         struct compound_hdr hdr = {
4625                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4626         };
4627         int status;
4628
4629         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4630         encode_compound_hdr(&xdr, req, &hdr);
4631         encode_sequence(&xdr, &args->seq_args, &hdr);
4632         encode_putfh(&xdr, args->fh, &hdr);
4633         status = encode_setacl(&xdr, args, &hdr);
4634         encode_nops(&hdr);
4635         return status;
4636 }
4637
4638 /*
4639  * Decode SETACL response
4640  */
4641 static int
4642 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4643                     struct nfs_setaclres *res)
4644 {
4645         struct xdr_stream xdr;
4646         struct compound_hdr hdr;
4647         int status;
4648
4649         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4650         status = decode_compound_hdr(&xdr, &hdr);
4651         if (status)
4652                 goto out;
4653         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4654         if (status)
4655                 goto out;
4656         status = decode_putfh(&xdr);
4657         if (status)
4658                 goto out;
4659         status = decode_setattr(&xdr);
4660 out:
4661         return status;
4662 }
4663
4664 /*
4665  * Decode GETACL response
4666  */
4667 static int
4668 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4669                     struct nfs_getaclres *res)
4670 {
4671         struct xdr_stream xdr;
4672         struct compound_hdr hdr;
4673         int status;
4674
4675         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4676         status = decode_compound_hdr(&xdr, &hdr);
4677         if (status)
4678                 goto out;
4679         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4680         if (status)
4681                 goto out;
4682         status = decode_putfh(&xdr);
4683         if (status)
4684                 goto out;
4685         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4686
4687 out:
4688         return status;
4689 }
4690
4691 /*
4692  * Decode CLOSE response
4693  */
4694 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4695 {
4696         struct xdr_stream xdr;
4697         struct compound_hdr hdr;
4698         int status;
4699
4700         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4701         status = decode_compound_hdr(&xdr, &hdr);
4702         if (status)
4703                 goto out;
4704         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4705         if (status)
4706                 goto out;
4707         status = decode_putfh(&xdr);
4708         if (status)
4709                 goto out;
4710         status = decode_close(&xdr, res);
4711         if (status != 0)
4712                 goto out;
4713         /*
4714          * Note: Server may do delete on close for this file
4715          *      in which case the getattr call will fail with
4716          *      an ESTALE error. Shouldn't be a problem,
4717          *      though, since fattr->valid will remain unset.
4718          */
4719         decode_getfattr(&xdr, res->fattr, res->server);
4720 out:
4721         return status;
4722 }
4723
4724 /*
4725  * Decode OPEN response
4726  */
4727 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4728 {
4729         struct xdr_stream xdr;
4730         struct compound_hdr hdr;
4731         int status;
4732
4733         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4734         status = decode_compound_hdr(&xdr, &hdr);
4735         if (status)
4736                 goto out;
4737         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4738         if (status)
4739                 goto out;
4740         status = decode_putfh(&xdr);
4741         if (status)
4742                 goto out;
4743         status = decode_savefh(&xdr);
4744         if (status)
4745                 goto out;
4746         status = decode_open(&xdr, res);
4747         if (status)
4748                 goto out;
4749         if (decode_getfh(&xdr, &res->fh) != 0)
4750                 goto out;
4751         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4752                 goto out;
4753         if (decode_restorefh(&xdr) != 0)
4754                 goto out;
4755         decode_getfattr(&xdr, res->dir_attr, res->server);
4756 out:
4757         return status;
4758 }
4759
4760 /*
4761  * Decode OPEN_CONFIRM response
4762  */
4763 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4764 {
4765         struct xdr_stream xdr;
4766         struct compound_hdr hdr;
4767         int status;
4768
4769         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4770         status = decode_compound_hdr(&xdr, &hdr);
4771         if (status)
4772                 goto out;
4773         status = decode_putfh(&xdr);
4774         if (status)
4775                 goto out;
4776         status = decode_open_confirm(&xdr, res);
4777 out:
4778         return status;
4779 }
4780
4781 /*
4782  * Decode OPEN response
4783  */
4784 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4785 {
4786         struct xdr_stream xdr;
4787         struct compound_hdr hdr;
4788         int status;
4789
4790         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4791         status = decode_compound_hdr(&xdr, &hdr);
4792         if (status)
4793                 goto out;
4794         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4795         if (status)
4796                 goto out;
4797         status = decode_putfh(&xdr);
4798         if (status)
4799                 goto out;
4800         status = decode_open(&xdr, res);
4801         if (status)
4802                 goto out;
4803         decode_getfattr(&xdr, res->f_attr, res->server);
4804 out:
4805         return status;
4806 }
4807
4808 /*
4809  * Decode SETATTR response
4810  */
4811 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4812 {
4813         struct xdr_stream xdr;
4814         struct compound_hdr hdr;
4815         int status;
4816
4817         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4818         status = decode_compound_hdr(&xdr, &hdr);
4819         if (status)
4820                 goto out;
4821         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4822         if (status)
4823                 goto out;
4824         status = decode_putfh(&xdr);
4825         if (status)
4826                 goto out;
4827         status = decode_setattr(&xdr);
4828         if (status)
4829                 goto out;
4830         decode_getfattr(&xdr, res->fattr, res->server);
4831 out:
4832         return status;
4833 }
4834
4835 /*
4836  * Decode LOCK response
4837  */
4838 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4839 {
4840         struct xdr_stream xdr;
4841         struct compound_hdr hdr;
4842         int status;
4843
4844         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4845         status = decode_compound_hdr(&xdr, &hdr);
4846         if (status)
4847                 goto out;
4848         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4849         if (status)
4850                 goto out;
4851         status = decode_putfh(&xdr);
4852         if (status)
4853                 goto out;
4854         status = decode_lock(&xdr, res);
4855 out:
4856         return status;
4857 }
4858
4859 /*
4860  * Decode LOCKT response
4861  */
4862 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4863 {
4864         struct xdr_stream xdr;
4865         struct compound_hdr hdr;
4866         int status;
4867
4868         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4869         status = decode_compound_hdr(&xdr, &hdr);
4870         if (status)
4871                 goto out;
4872         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4873         if (status)
4874                 goto out;
4875         status = decode_putfh(&xdr);
4876         if (status)
4877                 goto out;
4878         status = decode_lockt(&xdr, res);
4879 out:
4880         return status;
4881 }
4882
4883 /*
4884  * Decode LOCKU response
4885  */
4886 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4887 {
4888         struct xdr_stream xdr;
4889         struct compound_hdr hdr;
4890         int status;
4891
4892         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4893         status = decode_compound_hdr(&xdr, &hdr);
4894         if (status)
4895                 goto out;
4896         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4897         if (status)
4898                 goto out;
4899         status = decode_putfh(&xdr);
4900         if (status)
4901                 goto out;
4902         status = decode_locku(&xdr, res);
4903 out:
4904         return status;
4905 }
4906
4907 /*
4908  * Decode READLINK response
4909  */
4910 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4911                                  struct nfs4_readlink_res *res)
4912 {
4913         struct xdr_stream xdr;
4914         struct compound_hdr hdr;
4915         int status;
4916
4917         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4918         status = decode_compound_hdr(&xdr, &hdr);
4919         if (status)
4920                 goto out;
4921         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4922         if (status)
4923                 goto out;
4924         status = decode_putfh(&xdr);
4925         if (status)
4926                 goto out;
4927         status = decode_readlink(&xdr, rqstp);
4928 out:
4929         return status;
4930 }
4931
4932 /*
4933  * Decode READDIR response
4934  */
4935 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4936 {
4937         struct xdr_stream xdr;
4938         struct compound_hdr hdr;
4939         int status;
4940
4941         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4942         status = decode_compound_hdr(&xdr, &hdr);
4943         if (status)
4944                 goto out;
4945         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4946         if (status)
4947                 goto out;
4948         status = decode_putfh(&xdr);
4949         if (status)
4950                 goto out;
4951         status = decode_readdir(&xdr, rqstp, res);
4952 out:
4953         return status;
4954 }
4955
4956 /*
4957  * Decode Read response
4958  */
4959 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4960 {
4961         struct xdr_stream xdr;
4962         struct compound_hdr hdr;
4963         int status;
4964
4965         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4966         status = decode_compound_hdr(&xdr, &hdr);
4967         if (status)
4968                 goto out;
4969         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4970         if (status)
4971                 goto out;
4972         status = decode_putfh(&xdr);
4973         if (status)
4974                 goto out;
4975         status = decode_read(&xdr, rqstp, res);
4976         if (!status)
4977                 status = res->count;
4978 out:
4979         return status;
4980 }
4981
4982 /*
4983  * Decode WRITE response
4984  */
4985 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4986 {
4987         struct xdr_stream xdr;
4988         struct compound_hdr hdr;
4989         int status;
4990
4991         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4992         status = decode_compound_hdr(&xdr, &hdr);
4993         if (status)
4994                 goto out;
4995         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4996         if (status)
4997                 goto out;
4998         status = decode_putfh(&xdr);
4999         if (status)
5000                 goto out;
5001         status = decode_write(&xdr, res);
5002         if (status)
5003                 goto out;
5004         decode_getfattr(&xdr, res->fattr, res->server);
5005         if (!status)
5006                 status = res->count;
5007 out:
5008         return status;
5009 }
5010
5011 /*
5012  * Decode COMMIT response
5013  */
5014 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5015 {
5016         struct xdr_stream xdr;
5017         struct compound_hdr hdr;
5018         int status;
5019
5020         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5021         status = decode_compound_hdr(&xdr, &hdr);
5022         if (status)
5023                 goto out;
5024         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5025         if (status)
5026                 goto out;
5027         status = decode_putfh(&xdr);
5028         if (status)
5029                 goto out;
5030         status = decode_commit(&xdr, res);
5031         if (status)
5032                 goto out;
5033         decode_getfattr(&xdr, res->fattr, res->server);
5034 out:
5035         return status;
5036 }
5037
5038 /*
5039  * FSINFO request
5040  */
5041 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5042                                struct nfs4_fsinfo_res *res)
5043 {
5044         struct xdr_stream xdr;
5045         struct compound_hdr hdr;
5046         int status;
5047
5048         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5049         status = decode_compound_hdr(&xdr, &hdr);
5050         if (!status)
5051                 status = decode_sequence(&xdr, &res->seq_res, req);
5052         if (!status)
5053                 status = decode_putfh(&xdr);
5054         if (!status)
5055                 status = decode_fsinfo(&xdr, res->fsinfo);
5056         return status;
5057 }
5058
5059 /*
5060  * PATHCONF request
5061  */
5062 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5063                                  struct nfs4_pathconf_res *res)
5064 {
5065         struct xdr_stream xdr;
5066         struct compound_hdr hdr;
5067         int status;
5068
5069         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5070         status = decode_compound_hdr(&xdr, &hdr);
5071         if (!status)
5072                 status = decode_sequence(&xdr, &res->seq_res, req);
5073         if (!status)
5074                 status = decode_putfh(&xdr);
5075         if (!status)
5076                 status = decode_pathconf(&xdr, res->pathconf);
5077         return status;
5078 }
5079
5080 /*
5081  * STATFS request
5082  */
5083 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5084                                struct nfs4_statfs_res *res)
5085 {
5086         struct xdr_stream xdr;
5087         struct compound_hdr hdr;
5088         int status;
5089
5090         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5091         status = decode_compound_hdr(&xdr, &hdr);
5092         if (!status)
5093                 status = decode_sequence(&xdr, &res->seq_res, req);
5094         if (!status)
5095                 status = decode_putfh(&xdr);
5096         if (!status)
5097                 status = decode_statfs(&xdr, res->fsstat);
5098         return status;
5099 }
5100
5101 /*
5102  * GETATTR_BITMAP request
5103  */
5104 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5105 {
5106         struct xdr_stream xdr;
5107         struct compound_hdr hdr;
5108         int status;
5109
5110         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5111         status = decode_compound_hdr(&xdr, &hdr);
5112         if (status)
5113                 goto out;
5114         status = decode_sequence(&xdr, &res->seq_res, req);
5115         if (status)
5116                 goto out;
5117         if ((status = decode_putfh(&xdr)) != 0)
5118                 goto out;
5119         status = decode_server_caps(&xdr, res);
5120 out:
5121         return status;
5122 }
5123
5124 /*
5125  * Decode RENEW response
5126  */
5127 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5128 {
5129         struct xdr_stream xdr;
5130         struct compound_hdr hdr;
5131         int status;
5132
5133         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5134         status = decode_compound_hdr(&xdr, &hdr);
5135         if (!status)
5136                 status = decode_renew(&xdr);
5137         return status;
5138 }
5139
5140 /*
5141  * a SETCLIENTID request
5142  */
5143 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5144                 struct nfs_client *clp)
5145 {
5146         struct xdr_stream xdr;
5147         struct compound_hdr hdr;
5148         int status;
5149
5150         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5151         status = decode_compound_hdr(&xdr, &hdr);
5152         if (!status)
5153                 status = decode_setclientid(&xdr, clp);
5154         return status;
5155 }
5156
5157 /*
5158  * a SETCLIENTID_CONFIRM request
5159  */
5160 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5161 {
5162         struct xdr_stream xdr;
5163         struct compound_hdr hdr;
5164         int status;
5165
5166         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5167         status = decode_compound_hdr(&xdr, &hdr);
5168         if (!status)
5169                 status = decode_setclientid_confirm(&xdr);
5170         if (!status)
5171                 status = decode_putrootfh(&xdr);
5172         if (!status)
5173                 status = decode_fsinfo(&xdr, fsinfo);
5174         return status;
5175 }
5176
5177 /*
5178  * DELEGRETURN request
5179  */
5180 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5181 {
5182         struct xdr_stream xdr;
5183         struct compound_hdr hdr;
5184         int status;
5185
5186         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5187         status = decode_compound_hdr(&xdr, &hdr);
5188         if (status)
5189                 goto out;
5190         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5191         if (status)
5192                 goto out;
5193         status = decode_putfh(&xdr);
5194         if (status != 0)
5195                 goto out;
5196         status = decode_delegreturn(&xdr);
5197         decode_getfattr(&xdr, res->fattr, res->server);
5198 out:
5199         return status;
5200 }
5201
5202 /*
5203  * FS_LOCATIONS request
5204  */
5205 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5206                                      struct nfs4_fs_locations_res *res)
5207 {
5208         struct xdr_stream xdr;
5209         struct compound_hdr hdr;
5210         int status;
5211
5212         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5213         status = decode_compound_hdr(&xdr, &hdr);
5214         if (status)
5215                 goto out;
5216         status = decode_sequence(&xdr, &res->seq_res, req);
5217         if (status)
5218                 goto out;
5219         if ((status = decode_putfh(&xdr)) != 0)
5220                 goto out;
5221         if ((status = decode_lookup(&xdr)) != 0)
5222                 goto out;
5223         xdr_enter_page(&xdr, PAGE_SIZE);
5224         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5225                                  res->fs_locations->server);
5226 out:
5227         return status;
5228 }
5229
5230 #if defined(CONFIG_NFS_V4_1)
5231 /*
5232  * EXCHANGE_ID request
5233  */
5234 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5235                                     void *res)
5236 {
5237         struct xdr_stream xdr;
5238         struct compound_hdr hdr;
5239         int status;
5240
5241         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5242         status = decode_compound_hdr(&xdr, &hdr);
5243         if (!status)
5244                 status = decode_exchange_id(&xdr, res);
5245         return status;
5246 }
5247
5248 /*
5249  * a CREATE_SESSION request
5250  */
5251 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5252                                        struct nfs41_create_session_res *res)
5253 {
5254         struct xdr_stream xdr;
5255         struct compound_hdr hdr;
5256         int status;
5257
5258         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5259         status = decode_compound_hdr(&xdr, &hdr);
5260         if (!status)
5261                 status = decode_create_session(&xdr, res);
5262         return status;
5263 }
5264
5265 /*
5266  * a DESTROY_SESSION request
5267  */
5268 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5269                                         void *dummy)
5270 {
5271         struct xdr_stream xdr;
5272         struct compound_hdr hdr;
5273         int status;
5274
5275         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5276         status = decode_compound_hdr(&xdr, &hdr);
5277         if (!status)
5278                 status = decode_destroy_session(&xdr, dummy);
5279         return status;
5280 }
5281
5282 /*
5283  * a SEQUENCE request
5284  */
5285 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5286                                  struct nfs4_sequence_res *res)
5287 {
5288         struct xdr_stream xdr;
5289         struct compound_hdr hdr;
5290         int status;
5291
5292         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5293         status = decode_compound_hdr(&xdr, &hdr);
5294         if (!status)
5295                 status = decode_sequence(&xdr, res, rqstp);
5296         return status;
5297 }
5298
5299 /*
5300  * a GET_LEASE_TIME request
5301  */
5302 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5303                                        struct nfs4_get_lease_time_res *res)
5304 {
5305         struct xdr_stream xdr;
5306         struct compound_hdr hdr;
5307         int status;
5308
5309         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5310         status = decode_compound_hdr(&xdr, &hdr);
5311         if (!status)
5312                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5313         if (!status)
5314                 status = decode_putrootfh(&xdr);
5315         if (!status)
5316                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5317         return status;
5318 }
5319 #endif /* CONFIG_NFS_V4_1 */
5320
5321 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5322 {
5323         uint32_t bitmap[2] = {0};
5324         uint32_t len;
5325
5326         if (!*p++) {
5327                 if (!*p)
5328                         return ERR_PTR(-EAGAIN);
5329                 entry->eof = 1;
5330                 return ERR_PTR(-EBADCOOKIE);
5331         }
5332
5333         entry->prev_cookie = entry->cookie;
5334         p = xdr_decode_hyper(p, &entry->cookie);
5335         entry->len = ntohl(*p++);
5336         entry->name = (const char *) p;
5337         p += XDR_QUADLEN(entry->len);
5338
5339         /*
5340          * In case the server doesn't return an inode number,
5341          * we fake one here.  (We don't use inode number 0,
5342          * since glibc seems to choke on it...)
5343          */
5344         entry->ino = 1;
5345
5346         len = ntohl(*p++);              /* bitmap length */
5347         if (len-- > 0) {
5348                 bitmap[0] = ntohl(*p++);
5349                 if (len-- > 0) {
5350                         bitmap[1] = ntohl(*p++);
5351                         p += len;
5352                 }
5353         }
5354         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5355         if (len > 0) {
5356                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5357                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5358                         /* Ignore the return value of rdattr_error for now */
5359                         p++;
5360                         len--;
5361                 }
5362                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5363                         xdr_decode_hyper(p, &entry->ino);
5364                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5365                         xdr_decode_hyper(p, &entry->ino);
5366                 p += len;
5367         }
5368
5369         entry->eof = !p[0] && p[1];
5370         return p;
5371 }
5372
5373 /*
5374  * We need to translate between nfs status return values and
5375  * the local errno values which may not be the same.
5376  */
5377 static struct {
5378         int stat;
5379         int errno;
5380 } nfs_errtbl[] = {
5381         { NFS4_OK,              0               },
5382         { NFS4ERR_PERM,         -EPERM          },
5383         { NFS4ERR_NOENT,        -ENOENT         },
5384         { NFS4ERR_IO,           -errno_NFSERR_IO},
5385         { NFS4ERR_NXIO,         -ENXIO          },
5386         { NFS4ERR_ACCESS,       -EACCES         },
5387         { NFS4ERR_EXIST,        -EEXIST         },
5388         { NFS4ERR_XDEV,         -EXDEV          },
5389         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5390         { NFS4ERR_ISDIR,        -EISDIR         },
5391         { NFS4ERR_INVAL,        -EINVAL         },
5392         { NFS4ERR_FBIG,         -EFBIG          },
5393         { NFS4ERR_NOSPC,        -ENOSPC         },
5394         { NFS4ERR_ROFS,         -EROFS          },
5395         { NFS4ERR_MLINK,        -EMLINK         },
5396         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5397         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5398         { NFS4ERR_DQUOT,        -EDQUOT         },
5399         { NFS4ERR_STALE,        -ESTALE         },
5400         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5401         { NFS4ERR_BADOWNER,     -EINVAL         },
5402         { NFS4ERR_BADNAME,      -EINVAL         },
5403         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5404         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5405         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5406         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5407         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5408         { NFS4ERR_LOCKED,       -EAGAIN         },
5409         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5410         { NFS4ERR_SYMLINK,      -ELOOP          },
5411         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5412         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5413         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5414                                                     * to be handled by a
5415                                                     * middle-layer.
5416                                                     */
5417         { -1,                   -EIO            }
5418 };
5419
5420 /*
5421  * Convert an NFS error code to a local one.
5422  * This one is used jointly by NFSv2 and NFSv3.
5423  */
5424 static int
5425 nfs4_stat_to_errno(int stat)
5426 {
5427         int i;
5428         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5429                 if (nfs_errtbl[i].stat == stat)
5430                         return nfs_errtbl[i].errno;
5431         }
5432         if (stat <= 10000 || stat > 10100) {
5433                 /* The server is looney tunes. */
5434                 return -ESERVERFAULT;
5435         }
5436         /* If we cannot translate the error, the recovery routines should
5437          * handle it.
5438          * Note: remaining NFSv4 error codes have values > 10000, so should
5439          * not conflict with native Linux error codes.
5440          */
5441         return -stat;
5442 }
5443
5444 #define PROC(proc, argtype, restype)                            \
5445 [NFSPROC4_CLNT_##proc] = {                                      \
5446         .p_proc   = NFSPROC4_COMPOUND,                          \
5447         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5448         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5449         .p_arglen = NFS4_##argtype##_sz,                        \
5450         .p_replen = NFS4_##restype##_sz,                        \
5451         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5452         .p_name   = #proc,                                      \
5453 }
5454
5455 struct rpc_procinfo     nfs4_procedures[] = {
5456   PROC(READ,            enc_read,       dec_read),
5457   PROC(WRITE,           enc_write,      dec_write),
5458   PROC(COMMIT,          enc_commit,     dec_commit),
5459   PROC(OPEN,            enc_open,       dec_open),
5460   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5461   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5462   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5463   PROC(CLOSE,           enc_close,      dec_close),
5464   PROC(SETATTR,         enc_setattr,    dec_setattr),
5465   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5466   PROC(RENEW,           enc_renew,      dec_renew),
5467   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5468   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5469   PROC(LOCK,            enc_lock,       dec_lock),
5470   PROC(LOCKT,           enc_lockt,      dec_lockt),
5471   PROC(LOCKU,           enc_locku,      dec_locku),
5472   PROC(ACCESS,          enc_access,     dec_access),
5473   PROC(GETATTR,         enc_getattr,    dec_getattr),
5474   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5475   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5476   PROC(REMOVE,          enc_remove,     dec_remove),
5477   PROC(RENAME,          enc_rename,     dec_rename),
5478   PROC(LINK,            enc_link,       dec_link),
5479   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5480   PROC(CREATE,          enc_create,     dec_create),
5481   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5482   PROC(STATFS,          enc_statfs,     dec_statfs),
5483   PROC(READLINK,        enc_readlink,   dec_readlink),
5484   PROC(READDIR,         enc_readdir,    dec_readdir),
5485   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5486   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5487   PROC(GETACL,          enc_getacl,     dec_getacl),
5488   PROC(SETACL,          enc_setacl,     dec_setacl),
5489   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5490 #if defined(CONFIG_NFS_V4_1)
5491   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5492   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5493   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5494   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5495   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5496 #endif /* CONFIG_NFS_V4_1 */
5497 };
5498
5499 struct rpc_version              nfs_version4 = {
5500         .number                 = 4,
5501         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5502         .procs                  = nfs4_procedures
5503 };
5504
5505 /*
5506  * Local variables:
5507  *  c-basic-offset: 8
5508  * End:
5509  */