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   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 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 706 {
 707         __be32 *p = xdr_reserve_space(xdr, nbytes);
 708         BUG_ON(!p);
 709         return p;
 710 }
 711
 712 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 713 {
 714         __be32 *p;
 715
 716         p = xdr_reserve_space(xdr, 4 + len);
 717         BUG_ON(p == NULL);
 718         xdr_encode_opaque(p, str, len);
 719 }
 720
 721 static void encode_compound_hdr(struct xdr_stream *xdr,
 722                                 struct rpc_rqst *req,
 723                                 struct compound_hdr *hdr)
 724 {
 725         __be32 *p;
 726         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 727
 728         /* initialize running count of expected bytes in reply.
 729          * NOTE: the replied tag SHOULD be the same is the one sent,
 730          * but this is not required as a MUST for the server to do so. */
 731         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 732
 733         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 734         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 735         p = reserve_space(xdr, 12 + hdr->taglen);
 736         *p++ = cpu_to_be32(hdr->taglen);
 737         p = xdr_encode_opaque_fixed(p, hdr->tag, hdr->taglen);
 738         *p++ = cpu_to_be32(hdr->minorversion);
 739         hdr->nops_p = p;
 740         *p = cpu_to_be32(hdr->nops);
 741 }
 742
 743 static void encode_nops(struct compound_hdr *hdr)
 744 {
 745         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 746         *hdr->nops_p = htonl(hdr->nops);
 747 }
 748
 749 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 750 {
 751         __be32 *p;
 752
 753         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 754         BUG_ON(p == NULL);
 755         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 756 }
 757
 758 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 759 {
 760         char owner_name[IDMAP_NAMESZ];
 761         char owner_group[IDMAP_NAMESZ];
 762         int owner_namelen = 0;
 763         int owner_grouplen = 0;
 764         __be32 *p;
 765         __be32 *q;
 766         int len;
 767         uint32_t bmval0 = 0;
 768         uint32_t bmval1 = 0;
 769
 770         /*
 771          * We reserve enough space to write the entire attribute buffer at once.
 772          * In the worst-case, this would be
 773          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 774          *          = 36 bytes, plus any contribution from variable-length fields
 775          *            such as owner/group.
 776          */
 777         len = 16;
 778
 779         /* Sigh */
 780         if (iap->ia_valid & ATTR_SIZE)
 781                 len += 8;
 782         if (iap->ia_valid & ATTR_MODE)
 783                 len += 4;
 784         if (iap->ia_valid & ATTR_UID) {
 785                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 786                 if (owner_namelen < 0) {
 787                         dprintk("nfs: couldn't resolve uid %d to string\n",
 788                                         iap->ia_uid);
 789                         /* XXX */
 790                         strcpy(owner_name, "nobody");
 791                         owner_namelen = sizeof("nobody") - 1;
 792                         /* goto out; */
 793                 }
 794                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 795         }
 796         if (iap->ia_valid & ATTR_GID) {
 797                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 798                 if (owner_grouplen < 0) {
 799                         dprintk("nfs: couldn't resolve gid %d to string\n",
 800                                         iap->ia_gid);
 801                         strcpy(owner_group, "nobody");
 802                         owner_grouplen = sizeof("nobody") - 1;
 803                         /* goto out; */
 804                 }
 805                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 806         }
 807         if (iap->ia_valid & ATTR_ATIME_SET)
 808                 len += 16;
 809         else if (iap->ia_valid & ATTR_ATIME)
 810                 len += 4;
 811         if (iap->ia_valid & ATTR_MTIME_SET)
 812                 len += 16;
 813         else if (iap->ia_valid & ATTR_MTIME)
 814                 len += 4;
 815         p = reserve_space(xdr, len);
 816
 817         /*
 818          * We write the bitmap length now, but leave the bitmap and the attribute
 819          * buffer length to be backfilled at the end of this routine.
 820          */
 821         *p++ = cpu_to_be32(2);
 822         q = p;
 823         p += 3;
 824
 825         if (iap->ia_valid & ATTR_SIZE) {
 826                 bmval0 |= FATTR4_WORD0_SIZE;
 827                 p = xdr_encode_hyper(p, iap->ia_size);
 828         }
 829         if (iap->ia_valid & ATTR_MODE) {
 830                 bmval1 |= FATTR4_WORD1_MODE;
 831                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 832         }
 833         if (iap->ia_valid & ATTR_UID) {
 834                 bmval1 |= FATTR4_WORD1_OWNER;
 835                 *p++ = cpu_to_be32(owner_namelen);
 836                 p = xdr_encode_opaque_fixed(p, owner_name, owner_namelen);
 837         }
 838         if (iap->ia_valid & ATTR_GID) {
 839                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 840                 *p++ = cpu_to_be32(owner_grouplen);
 841                 p = xdr_encode_opaque_fixed(p, owner_group, owner_grouplen);
 842         }
 843         if (iap->ia_valid & ATTR_ATIME_SET) {
 844                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 845                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 846                 *p++ = cpu_to_be32(0);
 847                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 848                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 849         }
 850         else if (iap->ia_valid & ATTR_ATIME) {
 851                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 852                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 853         }
 854         if (iap->ia_valid & ATTR_MTIME_SET) {
 855                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 856                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 857                 *p++ = cpu_to_be32(0);
 858                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 859                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 860         }
 861         else if (iap->ia_valid & ATTR_MTIME) {
 862                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 863                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 864         }
 865
 866         /*
 867          * Now we backfill the bitmap and the attribute buffer length.
 868          */
 869         if (len != ((char *)p - (char *)q) + 4) {
 870                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 871                                 len, ((char *)p - (char *)q) + 4);
 872                 BUG();
 873         }
 874         len = (char *)p - (char *)q - 12;
 875         *q++ = htonl(bmval0);
 876         *q++ = htonl(bmval1);
 877         *q = htonl(len);
 878
 879 /* out: */
 880 }
 881
 882 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 883 {
 884         __be32 *p;
 885
 886         p = reserve_space(xdr, 8);
 887         *p++ = cpu_to_be32(OP_ACCESS);
 888         *p = cpu_to_be32(access);
 889         hdr->nops++;
 890         hdr->replen += decode_access_maxsz;
 891 }
 892
 893 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 894 {
 895         __be32 *p;
 896
 897         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 898         *p++ = cpu_to_be32(OP_CLOSE);
 899         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 900         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 901         hdr->nops++;
 902         hdr->replen += decode_close_maxsz;
 903 }
 904
 905 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 906 {
 907         __be32 *p;
 908
 909         p = reserve_space(xdr, 16);
 910         *p++ = cpu_to_be32(OP_COMMIT);
 911         p = xdr_encode_hyper(p, args->offset);
 912         *p = cpu_to_be32(args->count);
 913         hdr->nops++;
 914         hdr->replen += decode_commit_maxsz;
 915 }
 916
 917 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 918 {
 919         __be32 *p;
 920
 921         p = reserve_space(xdr, 8);
 922         *p++ = cpu_to_be32(OP_CREATE);
 923         *p = cpu_to_be32(create->ftype);
 924
 925         switch (create->ftype) {
 926         case NF4LNK:
 927                 p = reserve_space(xdr, 4);
 928                 *p = cpu_to_be32(create->u.symlink.len);
 929                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 930                 break;
 931
 932         case NF4BLK: case NF4CHR:
 933                 p = reserve_space(xdr, 8);
 934                 *p++ = cpu_to_be32(create->u.device.specdata1);
 935                 *p = cpu_to_be32(create->u.device.specdata2);
 936                 break;
 937
 938         default:
 939                 break;
 940         }
 941
 942         p = reserve_space(xdr, 4 + create->name->len);
 943         *p++ = cpu_to_be32(create->name->len);
 944         xdr_encode_opaque_fixed(p, create->name->name, create->name->len);
 945         hdr->nops++;
 946         hdr->replen += decode_create_maxsz;
 947
 948         encode_attrs(xdr, create->attrs, create->server);
 949 }
 950
 951 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 952 {
 953         __be32 *p;
 954
 955         p = reserve_space(xdr, 12);
 956         *p++ = cpu_to_be32(OP_GETATTR);
 957         *p++ = cpu_to_be32(1);
 958         *p = cpu_to_be32(bitmap);
 959         hdr->nops++;
 960         hdr->replen += decode_getattr_maxsz;
 961 }
 962
 963 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 964 {
 965         __be32 *p;
 966
 967         p = reserve_space(xdr, 16);
 968         *p++ = cpu_to_be32(OP_GETATTR);
 969         *p++ = cpu_to_be32(2);
 970         *p++ = cpu_to_be32(bm0);
 971         *p = cpu_to_be32(bm1);
 972         hdr->nops++;
 973         hdr->replen += decode_getattr_maxsz;
 974 }
 975
 976 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 977 {
 978         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 979                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 980 }
 981
 982 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 983 {
 984         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 985                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 986 }
 987
 988 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 989 {
 990         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 991                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 992 }
 993
 994 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 995 {
 996         __be32 *p;
 997
 998         p = reserve_space(xdr, 4);
 999         *p = cpu_to_be32(OP_GETFH);
1000         hdr->nops++;
1001         hdr->replen += decode_getfh_maxsz;
1002 }
1003
1004 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1005 {
1006         __be32 *p;
1007
1008         p = reserve_space(xdr, 8 + name->len);
1009         *p++ = cpu_to_be32(OP_LINK);
1010         *p++ = cpu_to_be32(name->len);
1011         xdr_encode_opaque_fixed(p, name->name, name->len);
1012         hdr->nops++;
1013         hdr->replen += decode_link_maxsz;
1014 }
1015
1016 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1017 {
1018         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1019                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1020         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1021 }
1022
1023 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1024 {
1025         if (fl->fl_end == OFFSET_MAX)
1026                 return ~(uint64_t)0;
1027         return fl->fl_end - fl->fl_start + 1;
1028 }
1029
1030 /*
1031  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1032  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1033  */
1034 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1035 {
1036         __be32 *p;
1037
1038         p = reserve_space(xdr, 32);
1039         *p++ = cpu_to_be32(OP_LOCK);
1040         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1041         *p++ = cpu_to_be32(args->reclaim);
1042         p = xdr_encode_hyper(p, args->fl->fl_start);
1043         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1044         *p = cpu_to_be32(args->new_lock_owner);
1045         if (args->new_lock_owner){
1046                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1047                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1048                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1049                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1050                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1051                 *p++ = cpu_to_be32(16);
1052                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1053                 xdr_encode_hyper(p, args->lock_owner.id);
1054         }
1055         else {
1056                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1057                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1058                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1059         }
1060         hdr->nops++;
1061         hdr->replen += decode_lock_maxsz;
1062 }
1063
1064 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1065 {
1066         __be32 *p;
1067
1068         p = reserve_space(xdr, 52);
1069         *p++ = cpu_to_be32(OP_LOCKT);
1070         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1071         p = xdr_encode_hyper(p, args->fl->fl_start);
1072         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1073         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1074         *p++ = cpu_to_be32(16);
1075         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1076         xdr_encode_hyper(p, args->lock_owner.id);
1077         hdr->nops++;
1078         hdr->replen += decode_lockt_maxsz;
1079 }
1080
1081 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1082 {
1083         __be32 *p;
1084
1085         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1086         *p++ = cpu_to_be32(OP_LOCKU);
1087         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1088         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1089         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1090         p = xdr_encode_hyper(p, args->fl->fl_start);
1091         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1092         hdr->nops++;
1093         hdr->replen += decode_locku_maxsz;
1094 }
1095
1096 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1097 {
1098         int len = name->len;
1099         __be32 *p;
1100
1101         p = reserve_space(xdr, 8 + len);
1102         *p++ = cpu_to_be32(OP_LOOKUP);
1103         *p++ = cpu_to_be32(len);
1104         xdr_encode_opaque_fixed(p, name->name, len);
1105         hdr->nops++;
1106         hdr->replen += decode_lookup_maxsz;
1107 }
1108
1109 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1110 {
1111         __be32 *p;
1112
1113         p = reserve_space(xdr, 8);
1114         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1115         case FMODE_READ:
1116                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1117                 break;
1118         case FMODE_WRITE:
1119                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1120                 break;
1121         case FMODE_READ|FMODE_WRITE:
1122                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1123                 break;
1124         default:
1125                 *p++ = cpu_to_be32(0);
1126         }
1127         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1128 }
1129
1130 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1131 {
1132         __be32 *p;
1133  /*
1134  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1135  * owner 4 = 32
1136  */
1137         p = reserve_space(xdr, 8);
1138         *p++ = cpu_to_be32(OP_OPEN);
1139         *p = cpu_to_be32(arg->seqid->sequence->counter);
1140         encode_share_access(xdr, arg->fmode);
1141         p = reserve_space(xdr, 28);
1142         p = xdr_encode_hyper(p, arg->clientid);
1143         *p++ = cpu_to_be32(16);
1144         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1145         xdr_encode_hyper(p, arg->id);
1146 }
1147
1148 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1149 {
1150         __be32 *p;
1151
1152         p = reserve_space(xdr, 4);
1153         switch(arg->open_flags & O_EXCL) {
1154         case 0:
1155                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1156                 encode_attrs(xdr, arg->u.attrs, arg->server);
1157                 break;
1158         default:
1159                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1160                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1161         }
1162 }
1163
1164 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1165 {
1166         __be32 *p;
1167
1168         p = reserve_space(xdr, 4);
1169         switch (arg->open_flags & O_CREAT) {
1170         case 0:
1171                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1172                 break;
1173         default:
1174                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1175                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1176                 encode_createmode(xdr, arg);
1177         }
1178 }
1179
1180 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1181 {
1182         __be32 *p;
1183
1184         p = reserve_space(xdr, 4);
1185         switch (delegation_type) {
1186         case 0:
1187                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1188                 break;
1189         case FMODE_READ:
1190                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1191                 break;
1192         case FMODE_WRITE|FMODE_READ:
1193                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1194                 break;
1195         default:
1196                 BUG();
1197         }
1198 }
1199
1200 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1201 {
1202         __be32 *p;
1203
1204         p = reserve_space(xdr, 4);
1205         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1206         encode_string(xdr, name->len, name->name);
1207 }
1208
1209 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1210 {
1211         __be32 *p;
1212
1213         p = reserve_space(xdr, 4);
1214         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1215         encode_delegation_type(xdr, type);
1216 }
1217
1218 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1219 {
1220         __be32 *p;
1221
1222         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1223         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1224         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1225         encode_string(xdr, name->len, name->name);
1226 }
1227
1228 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1229 {
1230         encode_openhdr(xdr, arg);
1231         encode_opentype(xdr, arg);
1232         switch (arg->claim) {
1233         case NFS4_OPEN_CLAIM_NULL:
1234                 encode_claim_null(xdr, arg->name);
1235                 break;
1236         case NFS4_OPEN_CLAIM_PREVIOUS:
1237                 encode_claim_previous(xdr, arg->u.delegation_type);
1238                 break;
1239         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1240                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1241                 break;
1242         default:
1243                 BUG();
1244         }
1245         hdr->nops++;
1246         hdr->replen += decode_open_maxsz;
1247 }
1248
1249 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1250 {
1251         __be32 *p;
1252
1253         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1254         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1255         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1256         *p = cpu_to_be32(arg->seqid->sequence->counter);
1257         hdr->nops++;
1258         hdr->replen += decode_open_confirm_maxsz;
1259 }
1260
1261 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1262 {
1263         __be32 *p;
1264
1265         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1266         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1267         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1268         *p = cpu_to_be32(arg->seqid->sequence->counter);
1269         encode_share_access(xdr, arg->fmode);
1270         hdr->nops++;
1271         hdr->replen += decode_open_downgrade_maxsz;
1272 }
1273
1274 static void
1275 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1276 {
1277         int len = fh->size;
1278         __be32 *p;
1279
1280         p = reserve_space(xdr, 8 + len);
1281         *p++ = cpu_to_be32(OP_PUTFH);
1282         *p++ = cpu_to_be32(len);
1283         xdr_encode_opaque_fixed(p, fh->data, len);
1284         hdr->nops++;
1285         hdr->replen += decode_putfh_maxsz;
1286 }
1287
1288 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1289 {
1290         __be32 *p;
1291
1292         p = reserve_space(xdr, 4);
1293         *p = cpu_to_be32(OP_PUTROOTFH);
1294         hdr->nops++;
1295         hdr->replen += decode_putrootfh_maxsz;
1296 }
1297
1298 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1299 {
1300         nfs4_stateid stateid;
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1304         if (ctx->state != NULL) {
1305                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1306                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1307         } else
1308                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1309 }
1310
1311 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1312 {
1313         __be32 *p;
1314
1315         p = reserve_space(xdr, 4);
1316         *p = cpu_to_be32(OP_READ);
1317
1318         encode_stateid(xdr, args->context);
1319
1320         p = reserve_space(xdr, 12);
1321         p = xdr_encode_hyper(p, args->offset);
1322         *p = cpu_to_be32(args->count);
1323         hdr->nops++;
1324         hdr->replen += decode_read_maxsz;
1325 }
1326
1327 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1328 {
1329         uint32_t attrs[2] = {
1330                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1331                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1332         };
1333         __be32 *p;
1334
1335         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1336         *p++ = cpu_to_be32(OP_READDIR);
1337         p = xdr_encode_hyper(p, readdir->cookie);
1338         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1339         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1340         *p++ = cpu_to_be32(readdir->count);
1341         *p++ = cpu_to_be32(2);
1342         /* Switch to mounted_on_fileid if the server supports it */
1343         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1344                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1345         else
1346                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1347         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1348         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1349         hdr->nops++;
1350         hdr->replen += decode_readdir_maxsz;
1351         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1352                         __func__,
1353                         (unsigned long long)readdir->cookie,
1354                         ((u32 *)readdir->verifier.data)[0],
1355                         ((u32 *)readdir->verifier.data)[1],
1356                         attrs[0] & readdir->bitmask[0],
1357                         attrs[1] & readdir->bitmask[1]);
1358 }
1359
1360 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1361 {
1362         __be32 *p;
1363
1364         p = reserve_space(xdr, 4);
1365         *p = cpu_to_be32(OP_READLINK);
1366         hdr->nops++;
1367         hdr->replen += decode_readlink_maxsz;
1368 }
1369
1370 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1371 {
1372         __be32 *p;
1373
1374         p = reserve_space(xdr, 8 + name->len);
1375         *p++ = cpu_to_be32(OP_REMOVE);
1376         *p++ = cpu_to_be32(name->len);
1377         xdr_encode_opaque_fixed(p, name->name, name->len);
1378         hdr->nops++;
1379         hdr->replen += decode_remove_maxsz;
1380 }
1381
1382 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1383 {
1384         __be32 *p;
1385
1386         p = reserve_space(xdr, 8 + oldname->len);
1387         *p++ = cpu_to_be32(OP_RENAME);
1388         *p++ = cpu_to_be32(oldname->len);
1389         xdr_encode_opaque_fixed(p, oldname->name, oldname->len);
1390
1391         p = reserve_space(xdr, 4 + newname->len);
1392         *p++ = cpu_to_be32(newname->len);
1393         xdr_encode_opaque_fixed(p, newname->name, newname->len);
1394         hdr->nops++;
1395         hdr->replen += decode_rename_maxsz;
1396 }
1397
1398 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 12);
1403         *p++ = cpu_to_be32(OP_RENEW);
1404         xdr_encode_hyper(p, client_stateid->cl_clientid);
1405         hdr->nops++;
1406         hdr->replen += decode_renew_maxsz;
1407 }
1408
1409 static void
1410 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1411 {
1412         __be32 *p;
1413
1414         p = reserve_space(xdr, 4);
1415         *p = cpu_to_be32(OP_RESTOREFH);
1416         hdr->nops++;
1417         hdr->replen += decode_restorefh_maxsz;
1418 }
1419
1420 static int
1421 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1422 {
1423         __be32 *p;
1424
1425         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1426         *p++ = cpu_to_be32(OP_SETATTR);
1427         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1428         p = reserve_space(xdr, 2*4);
1429         *p++ = cpu_to_be32(1);
1430         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1431         if (arg->acl_len % 4)
1432                 return -EINVAL;
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(arg->acl_len);
1435         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1436         hdr->nops++;
1437         hdr->replen += decode_setacl_maxsz;
1438         return 0;
1439 }
1440
1441 static void
1442 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1443 {
1444         __be32 *p;
1445
1446         p = reserve_space(xdr, 4);
1447         *p = cpu_to_be32(OP_SAVEFH);
1448         hdr->nops++;
1449         hdr->replen += decode_savefh_maxsz;
1450 }
1451
1452 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1457         *p++ = cpu_to_be32(OP_SETATTR);
1458         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1459         hdr->nops++;
1460         hdr->replen += decode_setattr_maxsz;
1461         encode_attrs(xdr, arg->iap, server);
1462 }
1463
1464 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1465 {
1466         __be32 *p;
1467
1468         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1469         *p++ = cpu_to_be32(OP_SETCLIENTID);
1470         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1471
1472         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1473         p = reserve_space(xdr, 4);
1474         *p = cpu_to_be32(setclientid->sc_prog);
1475         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1476         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1477         p = reserve_space(xdr, 4);
1478         *p = cpu_to_be32(setclientid->sc_cb_ident);
1479         hdr->nops++;
1480         hdr->replen += decode_setclientid_maxsz;
1481 }
1482
1483 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1484 {
1485         __be32 *p;
1486
1487         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1488         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1489         p = xdr_encode_hyper(p, client_state->cl_clientid);
1490         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1491         hdr->nops++;
1492         hdr->replen += decode_setclientid_confirm_maxsz;
1493 }
1494
1495 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1496 {
1497         __be32 *p;
1498
1499         p = reserve_space(xdr, 4);
1500         *p = cpu_to_be32(OP_WRITE);
1501
1502         encode_stateid(xdr, args->context);
1503
1504         p = reserve_space(xdr, 16);
1505         p = xdr_encode_hyper(p, args->offset);
1506         *p++ = cpu_to_be32(args->stable);
1507         *p = cpu_to_be32(args->count);
1508
1509         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1510         hdr->nops++;
1511         hdr->replen += decode_write_maxsz;
1512 }
1513
1514 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1515 {
1516         __be32 *p;
1517
1518         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1519
1520         *p++ = cpu_to_be32(OP_DELEGRETURN);
1521         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1522         hdr->nops++;
1523         hdr->replen += decode_delegreturn_maxsz;
1524 }
1525
1526 #if defined(CONFIG_NFS_V4_1)
1527 /* NFSv4.1 operations */
1528 static void encode_exchange_id(struct xdr_stream *xdr,
1529                                struct nfs41_exchange_id_args *args,
1530                                struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1535         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1536         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1537
1538         encode_string(xdr, args->id_len, args->id);
1539
1540         p = reserve_space(xdr, 12);
1541         *p++ = cpu_to_be32(args->flags);
1542         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1543         *p = cpu_to_be32(0);    /* zero length implementation id array */
1544         hdr->nops++;
1545         hdr->replen += decode_exchange_id_maxsz;
1546 }
1547
1548 static void encode_create_session(struct xdr_stream *xdr,
1549                                   struct nfs41_create_session_args *args,
1550                                   struct compound_hdr *hdr)
1551 {
1552         __be32 *p;
1553         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1554         uint32_t len;
1555         struct nfs_client *clp = args->client;
1556
1557         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1558                         clp->cl_ipaddr);
1559
1560         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1561         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1562         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1563         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1564         *p++ = cpu_to_be32(args->flags);                        /*flags */
1565
1566         /* Fore Channel */
1567         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1568         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1569         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1570         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1571         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1572         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1573         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1574
1575         /* Back Channel */
1576         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1577         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1578         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1579         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1580         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1581         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1582         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1583
1584         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1585         *p++ = cpu_to_be32(1);
1586         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1587
1588         /* authsys_parms rfc1831 */
1589         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1590         *p++ = cpu_to_be32(len);
1591         p = xdr_encode_opaque_fixed(p, machine_name, len);
1592         *p++ = cpu_to_be32(0);                          /* UID */
1593         *p++ = cpu_to_be32(0);                          /* GID */
1594         *p = cpu_to_be32(0);                            /* No more gids */
1595         hdr->nops++;
1596         hdr->replen += decode_create_session_maxsz;
1597 }
1598
1599 static void encode_destroy_session(struct xdr_stream *xdr,
1600                                    struct nfs4_session *session,
1601                                    struct compound_hdr *hdr)
1602 {
1603         __be32 *p;
1604         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1605         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1606         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1607         hdr->nops++;
1608         hdr->replen += decode_destroy_session_maxsz;
1609 }
1610 #endif /* CONFIG_NFS_V4_1 */
1611
1612 static void encode_sequence(struct xdr_stream *xdr,
1613                             const struct nfs4_sequence_args *args,
1614                             struct compound_hdr *hdr)
1615 {
1616 #if defined(CONFIG_NFS_V4_1)
1617         struct nfs4_session *session = args->sa_session;
1618         struct nfs4_slot_table *tp;
1619         struct nfs4_slot *slot;
1620         __be32 *p;
1621
1622         if (!session)
1623                 return;
1624
1625         tp = &session->fc_slot_table;
1626
1627         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1628         slot = tp->slots + args->sa_slotid;
1629
1630         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1631         *p++ = cpu_to_be32(OP_SEQUENCE);
1632
1633         /*
1634          * Sessionid + seqid + slotid + max slotid + cache_this
1635          */
1636         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1637                 "max_slotid=%d cache_this=%d\n",
1638                 __func__,
1639                 ((u32 *)session->sess_id.data)[0],
1640                 ((u32 *)session->sess_id.data)[1],
1641                 ((u32 *)session->sess_id.data)[2],
1642                 ((u32 *)session->sess_id.data)[3],
1643                 slot->seq_nr, args->sa_slotid,
1644                 tp->highest_used_slotid, args->sa_cache_this);
1645         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1646         *p++ = cpu_to_be32(slot->seq_nr);
1647         *p++ = cpu_to_be32(args->sa_slotid);
1648         *p++ = cpu_to_be32(tp->highest_used_slotid);
1649         *p = cpu_to_be32(args->sa_cache_this);
1650         hdr->nops++;
1651         hdr->replen += decode_sequence_maxsz;
1652 #endif /* CONFIG_NFS_V4_1 */
1653 }
1654
1655 /*
1656  * END OF "GENERIC" ENCODE ROUTINES.
1657  */
1658
1659 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1660 {
1661 #if defined(CONFIG_NFS_V4_1)
1662         if (args->sa_session)
1663                 return args->sa_session->clp->cl_minorversion;
1664 #endif /* CONFIG_NFS_V4_1 */
1665         return 0;
1666 }
1667
1668 /*
1669  * Encode an ACCESS request
1670  */
1671 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1672 {
1673         struct xdr_stream xdr;
1674         struct compound_hdr hdr = {
1675                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1676         };
1677
1678         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1679         encode_compound_hdr(&xdr, req, &hdr);
1680         encode_sequence(&xdr, &args->seq_args, &hdr);
1681         encode_putfh(&xdr, args->fh, &hdr);
1682         encode_access(&xdr, args->access, &hdr);
1683         encode_getfattr(&xdr, args->bitmask, &hdr);
1684         encode_nops(&hdr);
1685         return 0;
1686 }
1687
1688 /*
1689  * Encode LOOKUP request
1690  */
1691 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1692 {
1693         struct xdr_stream xdr;
1694         struct compound_hdr hdr = {
1695                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1696         };
1697
1698         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1699         encode_compound_hdr(&xdr, req, &hdr);
1700         encode_sequence(&xdr, &args->seq_args, &hdr);
1701         encode_putfh(&xdr, args->dir_fh, &hdr);
1702         encode_lookup(&xdr, args->name, &hdr);
1703         encode_getfh(&xdr, &hdr);
1704         encode_getfattr(&xdr, args->bitmask, &hdr);
1705         encode_nops(&hdr);
1706         return 0;
1707 }
1708
1709 /*
1710  * Encode LOOKUP_ROOT request
1711  */
1712 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1713 {
1714         struct xdr_stream xdr;
1715         struct compound_hdr hdr = {
1716                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1717         };
1718
1719         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1720         encode_compound_hdr(&xdr, req, &hdr);
1721         encode_sequence(&xdr, &args->seq_args, &hdr);
1722         encode_putrootfh(&xdr, &hdr);
1723         encode_getfh(&xdr, &hdr);
1724         encode_getfattr(&xdr, args->bitmask, &hdr);
1725         encode_nops(&hdr);
1726         return 0;
1727 }
1728
1729 /*
1730  * Encode REMOVE request
1731  */
1732 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1733 {
1734         struct xdr_stream xdr;
1735         struct compound_hdr hdr = {
1736                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1737         };
1738
1739         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1740         encode_compound_hdr(&xdr, req, &hdr);
1741         encode_sequence(&xdr, &args->seq_args, &hdr);
1742         encode_putfh(&xdr, args->fh, &hdr);
1743         encode_remove(&xdr, &args->name, &hdr);
1744         encode_getfattr(&xdr, args->bitmask, &hdr);
1745         encode_nops(&hdr);
1746         return 0;
1747 }
1748
1749 /*
1750  * Encode RENAME request
1751  */
1752 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1753 {
1754         struct xdr_stream xdr;
1755         struct compound_hdr hdr = {
1756                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1757         };
1758
1759         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1760         encode_compound_hdr(&xdr, req, &hdr);
1761         encode_sequence(&xdr, &args->seq_args, &hdr);
1762         encode_putfh(&xdr, args->old_dir, &hdr);
1763         encode_savefh(&xdr, &hdr);
1764         encode_putfh(&xdr, args->new_dir, &hdr);
1765         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1766         encode_getfattr(&xdr, args->bitmask, &hdr);
1767         encode_restorefh(&xdr, &hdr);
1768         encode_getfattr(&xdr, args->bitmask, &hdr);
1769         encode_nops(&hdr);
1770         return 0;
1771 }
1772
1773 /*
1774  * Encode LINK request
1775  */
1776 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1777 {
1778         struct xdr_stream xdr;
1779         struct compound_hdr hdr = {
1780                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1781         };
1782
1783         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1784         encode_compound_hdr(&xdr, req, &hdr);
1785         encode_sequence(&xdr, &args->seq_args, &hdr);
1786         encode_putfh(&xdr, args->fh, &hdr);
1787         encode_savefh(&xdr, &hdr);
1788         encode_putfh(&xdr, args->dir_fh, &hdr);
1789         encode_link(&xdr, args->name, &hdr);
1790         encode_getfattr(&xdr, args->bitmask, &hdr);
1791         encode_restorefh(&xdr, &hdr);
1792         encode_getfattr(&xdr, args->bitmask, &hdr);
1793         encode_nops(&hdr);
1794         return 0;
1795 }
1796
1797 /*
1798  * Encode CREATE request
1799  */
1800 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1801 {
1802         struct xdr_stream xdr;
1803         struct compound_hdr hdr = {
1804                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1805         };
1806
1807         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1808         encode_compound_hdr(&xdr, req, &hdr);
1809         encode_sequence(&xdr, &args->seq_args, &hdr);
1810         encode_putfh(&xdr, args->dir_fh, &hdr);
1811         encode_savefh(&xdr, &hdr);
1812         encode_create(&xdr, args, &hdr);
1813         encode_getfh(&xdr, &hdr);
1814         encode_getfattr(&xdr, args->bitmask, &hdr);
1815         encode_restorefh(&xdr, &hdr);
1816         encode_getfattr(&xdr, args->bitmask, &hdr);
1817         encode_nops(&hdr);
1818         return 0;
1819 }
1820
1821 /*
1822  * Encode SYMLINK request
1823  */
1824 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1825 {
1826         return nfs4_xdr_enc_create(req, p, args);
1827 }
1828
1829 /*
1830  * Encode GETATTR request
1831  */
1832 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1833 {
1834         struct xdr_stream xdr;
1835         struct compound_hdr hdr = {
1836                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1837         };
1838
1839         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1840         encode_compound_hdr(&xdr, req, &hdr);
1841         encode_sequence(&xdr, &args->seq_args, &hdr);
1842         encode_putfh(&xdr, args->fh, &hdr);
1843         encode_getfattr(&xdr, args->bitmask, &hdr);
1844         encode_nops(&hdr);
1845         return 0;
1846 }
1847
1848 /*
1849  * Encode a CLOSE request
1850  */
1851 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1852 {
1853         struct xdr_stream xdr;
1854         struct compound_hdr hdr = {
1855                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1856         };
1857
1858         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1859         encode_compound_hdr(&xdr, req, &hdr);
1860         encode_sequence(&xdr, &args->seq_args, &hdr);
1861         encode_putfh(&xdr, args->fh, &hdr);
1862         encode_close(&xdr, args, &hdr);
1863         encode_getfattr(&xdr, args->bitmask, &hdr);
1864         encode_nops(&hdr);
1865         return 0;
1866 }
1867
1868 /*
1869  * Encode an OPEN request
1870  */
1871 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1872 {
1873         struct xdr_stream xdr;
1874         struct compound_hdr hdr = {
1875                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1876         };
1877
1878         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1879         encode_compound_hdr(&xdr, req, &hdr);
1880         encode_sequence(&xdr, &args->seq_args, &hdr);
1881         encode_putfh(&xdr, args->fh, &hdr);
1882         encode_savefh(&xdr, &hdr);
1883         encode_open(&xdr, args, &hdr);
1884         encode_getfh(&xdr, &hdr);
1885         encode_getfattr(&xdr, args->bitmask, &hdr);
1886         encode_restorefh(&xdr, &hdr);
1887         encode_getfattr(&xdr, args->bitmask, &hdr);
1888         encode_nops(&hdr);
1889         return 0;
1890 }
1891
1892 /*
1893  * Encode an OPEN_CONFIRM request
1894  */
1895 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1896 {
1897         struct xdr_stream xdr;
1898         struct compound_hdr hdr = {
1899                 .nops   = 0,
1900         };
1901
1902         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1903         encode_compound_hdr(&xdr, req, &hdr);
1904         encode_putfh(&xdr, args->fh, &hdr);
1905         encode_open_confirm(&xdr, args, &hdr);
1906         encode_nops(&hdr);
1907         return 0;
1908 }
1909
1910 /*
1911  * Encode an OPEN request with no attributes.
1912  */
1913 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1914 {
1915         struct xdr_stream xdr;
1916         struct compound_hdr hdr = {
1917                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1918         };
1919
1920         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1921         encode_compound_hdr(&xdr, req, &hdr);
1922         encode_sequence(&xdr, &args->seq_args, &hdr);
1923         encode_putfh(&xdr, args->fh, &hdr);
1924         encode_open(&xdr, args, &hdr);
1925         encode_getfattr(&xdr, args->bitmask, &hdr);
1926         encode_nops(&hdr);
1927         return 0;
1928 }
1929
1930 /*
1931  * Encode an OPEN_DOWNGRADE request
1932  */
1933 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1934 {
1935         struct xdr_stream xdr;
1936         struct compound_hdr hdr = {
1937                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1938         };
1939
1940         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1941         encode_compound_hdr(&xdr, req, &hdr);
1942         encode_sequence(&xdr, &args->seq_args, &hdr);
1943         encode_putfh(&xdr, args->fh, &hdr);
1944         encode_open_downgrade(&xdr, args, &hdr);
1945         encode_getfattr(&xdr, args->bitmask, &hdr);
1946         encode_nops(&hdr);
1947         return 0;
1948 }
1949
1950 /*
1951  * Encode a LOCK request
1952  */
1953 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1954 {
1955         struct xdr_stream xdr;
1956         struct compound_hdr hdr = {
1957                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1958         };
1959
1960         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1961         encode_compound_hdr(&xdr, req, &hdr);
1962         encode_sequence(&xdr, &args->seq_args, &hdr);
1963         encode_putfh(&xdr, args->fh, &hdr);
1964         encode_lock(&xdr, args, &hdr);
1965         encode_nops(&hdr);
1966         return 0;
1967 }
1968
1969 /*
1970  * Encode a LOCKT request
1971  */
1972 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1973 {
1974         struct xdr_stream xdr;
1975         struct compound_hdr hdr = {
1976                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1977         };
1978
1979         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1980         encode_compound_hdr(&xdr, req, &hdr);
1981         encode_sequence(&xdr, &args->seq_args, &hdr);
1982         encode_putfh(&xdr, args->fh, &hdr);
1983         encode_lockt(&xdr, args, &hdr);
1984         encode_nops(&hdr);
1985         return 0;
1986 }
1987
1988 /*
1989  * Encode a LOCKU request
1990  */
1991 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1992 {
1993         struct xdr_stream xdr;
1994         struct compound_hdr hdr = {
1995                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1996         };
1997
1998         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1999         encode_compound_hdr(&xdr, req, &hdr);
2000         encode_sequence(&xdr, &args->seq_args, &hdr);
2001         encode_putfh(&xdr, args->fh, &hdr);
2002         encode_locku(&xdr, args, &hdr);
2003         encode_nops(&hdr);
2004         return 0;
2005 }
2006
2007 /*
2008  * Encode a READLINK request
2009  */
2010 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2011 {
2012         struct xdr_stream xdr;
2013         struct compound_hdr hdr = {
2014                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2015         };
2016
2017         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2018         encode_compound_hdr(&xdr, req, &hdr);
2019         encode_sequence(&xdr, &args->seq_args, &hdr);
2020         encode_putfh(&xdr, args->fh, &hdr);
2021         encode_readlink(&xdr, args, req, &hdr);
2022
2023         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2024                         args->pgbase, args->pglen);
2025         encode_nops(&hdr);
2026         return 0;
2027 }
2028
2029 /*
2030  * Encode a READDIR request
2031  */
2032 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2033 {
2034         struct xdr_stream xdr;
2035         struct compound_hdr hdr = {
2036                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2037         };
2038
2039         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2040         encode_compound_hdr(&xdr, req, &hdr);
2041         encode_sequence(&xdr, &args->seq_args, &hdr);
2042         encode_putfh(&xdr, args->fh, &hdr);
2043         encode_readdir(&xdr, args, req, &hdr);
2044
2045         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2046                          args->pgbase, args->count);
2047         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2048                         __func__, hdr.replen << 2, args->pages,
2049                         args->pgbase, args->count);
2050         encode_nops(&hdr);
2051         return 0;
2052 }
2053
2054 /*
2055  * Encode a READ request
2056  */
2057 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2058 {
2059         struct xdr_stream xdr;
2060         struct compound_hdr hdr = {
2061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062         };
2063
2064         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2065         encode_compound_hdr(&xdr, req, &hdr);
2066         encode_sequence(&xdr, &args->seq_args, &hdr);
2067         encode_putfh(&xdr, args->fh, &hdr);
2068         encode_read(&xdr, args, &hdr);
2069
2070         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2071                          args->pages, args->pgbase, args->count);
2072         req->rq_rcv_buf.flags |= XDRBUF_READ;
2073         encode_nops(&hdr);
2074         return 0;
2075 }
2076
2077 /*
2078  * Encode an SETATTR request
2079  */
2080 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2081 {
2082         struct xdr_stream xdr;
2083         struct compound_hdr hdr = {
2084                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2085         };
2086
2087         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2088         encode_compound_hdr(&xdr, req, &hdr);
2089         encode_sequence(&xdr, &args->seq_args, &hdr);
2090         encode_putfh(&xdr, args->fh, &hdr);
2091         encode_setattr(&xdr, args, args->server, &hdr);
2092         encode_getfattr(&xdr, args->bitmask, &hdr);
2093         encode_nops(&hdr);
2094         return 0;
2095 }
2096
2097 /*
2098  * Encode a GETACL request
2099  */
2100 static int
2101 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2102                 struct nfs_getaclargs *args)
2103 {
2104         struct xdr_stream xdr;
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108         uint32_t replen;
2109
2110         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2111         encode_compound_hdr(&xdr, req, &hdr);
2112         encode_sequence(&xdr, &args->seq_args, &hdr);
2113         encode_putfh(&xdr, args->fh, &hdr);
2114         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2115         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2116
2117         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2118                 args->acl_pages, args->acl_pgbase, args->acl_len);
2119         encode_nops(&hdr);
2120         return 0;
2121 }
2122
2123 /*
2124  * Encode a WRITE request
2125  */
2126 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2127 {
2128         struct xdr_stream xdr;
2129         struct compound_hdr hdr = {
2130                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2131         };
2132
2133         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2134         encode_compound_hdr(&xdr, req, &hdr);
2135         encode_sequence(&xdr, &args->seq_args, &hdr);
2136         encode_putfh(&xdr, args->fh, &hdr);
2137         encode_write(&xdr, args, &hdr);
2138         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2139         encode_getfattr(&xdr, args->bitmask, &hdr);
2140         encode_nops(&hdr);
2141         return 0;
2142 }
2143
2144 /*
2145  *  a COMMIT request
2146  */
2147 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2148 {
2149         struct xdr_stream xdr;
2150         struct compound_hdr hdr = {
2151                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2152         };
2153
2154         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2155         encode_compound_hdr(&xdr, req, &hdr);
2156         encode_sequence(&xdr, &args->seq_args, &hdr);
2157         encode_putfh(&xdr, args->fh, &hdr);
2158         encode_commit(&xdr, args, &hdr);
2159         encode_getfattr(&xdr, args->bitmask, &hdr);
2160         encode_nops(&hdr);
2161         return 0;
2162 }
2163
2164 /*
2165  * FSINFO request
2166  */
2167 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2168 {
2169         struct xdr_stream xdr;
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2175         encode_compound_hdr(&xdr, req, &hdr);
2176         encode_sequence(&xdr, &args->seq_args, &hdr);
2177         encode_putfh(&xdr, args->fh, &hdr);
2178         encode_fsinfo(&xdr, args->bitmask, &hdr);
2179         encode_nops(&hdr);
2180         return 0;
2181 }
2182
2183 /*
2184  * a PATHCONF request
2185  */
2186 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2187 {
2188         struct xdr_stream xdr;
2189         struct compound_hdr hdr = {
2190                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2191         };
2192
2193         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2194         encode_compound_hdr(&xdr, req, &hdr);
2195         encode_sequence(&xdr, &args->seq_args, &hdr);
2196         encode_putfh(&xdr, args->fh, &hdr);
2197         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2198                            &hdr);
2199         encode_nops(&hdr);
2200         return 0;
2201 }
2202
2203 /*
2204  * a STATFS request
2205  */
2206 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2207 {
2208         struct xdr_stream xdr;
2209         struct compound_hdr hdr = {
2210                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211         };
2212
2213         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2214         encode_compound_hdr(&xdr, req, &hdr);
2215         encode_sequence(&xdr, &args->seq_args, &hdr);
2216         encode_putfh(&xdr, args->fh, &hdr);
2217         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2218                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2219         encode_nops(&hdr);
2220         return 0;
2221 }
2222
2223 /*
2224  * GETATTR_BITMAP request
2225  */
2226 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2227                                     struct nfs4_server_caps_arg *args)
2228 {
2229         struct xdr_stream xdr;
2230         struct compound_hdr hdr = {
2231                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2232         };
2233
2234         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2235         encode_compound_hdr(&xdr, req, &hdr);
2236         encode_sequence(&xdr, &args->seq_args, &hdr);
2237         encode_putfh(&xdr, args->fhandle, &hdr);
2238         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2239                            FATTR4_WORD0_LINK_SUPPORT|
2240                            FATTR4_WORD0_SYMLINK_SUPPORT|
2241                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2242         encode_nops(&hdr);
2243         return 0;
2244 }
2245
2246 /*
2247  * a RENEW request
2248  */
2249 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2250 {
2251         struct xdr_stream xdr;
2252         struct compound_hdr hdr = {
2253                 .nops   = 0,
2254         };
2255
2256         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2257         encode_compound_hdr(&xdr, req, &hdr);
2258         encode_renew(&xdr, clp, &hdr);
2259         encode_nops(&hdr);
2260         return 0;
2261 }
2262
2263 /*
2264  * a SETCLIENTID request
2265  */
2266 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2267 {
2268         struct xdr_stream xdr;
2269         struct compound_hdr hdr = {
2270                 .nops   = 0,
2271         };
2272
2273         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2274         encode_compound_hdr(&xdr, req, &hdr);
2275         encode_setclientid(&xdr, sc, &hdr);
2276         encode_nops(&hdr);
2277         return 0;
2278 }
2279
2280 /*
2281  * a SETCLIENTID_CONFIRM request
2282  */
2283 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2284 {
2285         struct xdr_stream xdr;
2286         struct compound_hdr hdr = {
2287                 .nops   = 0,
2288         };
2289         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2290
2291         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2292         encode_compound_hdr(&xdr, req, &hdr);
2293         encode_setclientid_confirm(&xdr, clp, &hdr);
2294         encode_putrootfh(&xdr, &hdr);
2295         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2296         encode_nops(&hdr);
2297         return 0;
2298 }
2299
2300 /*
2301  * DELEGRETURN request
2302  */
2303 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2304 {
2305         struct xdr_stream xdr;
2306         struct compound_hdr hdr = {
2307                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2308         };
2309
2310         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2311         encode_compound_hdr(&xdr, req, &hdr);
2312         encode_sequence(&xdr, &args->seq_args, &hdr);
2313         encode_putfh(&xdr, args->fhandle, &hdr);
2314         encode_delegreturn(&xdr, args->stateid, &hdr);
2315         encode_getfattr(&xdr, args->bitmask, &hdr);
2316         encode_nops(&hdr);
2317         return 0;
2318 }
2319
2320 /*
2321  * Encode FS_LOCATIONS request
2322  */
2323 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2324 {
2325         struct xdr_stream xdr;
2326         struct compound_hdr hdr = {
2327                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2328         };
2329         uint32_t replen;
2330
2331         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2332         encode_compound_hdr(&xdr, req, &hdr);
2333         encode_sequence(&xdr, &args->seq_args, &hdr);
2334         encode_putfh(&xdr, args->dir_fh, &hdr);
2335         encode_lookup(&xdr, args->name, &hdr);
2336         replen = hdr.replen;    /* get the attribute into args->page */
2337         encode_fs_locations(&xdr, args->bitmask, &hdr);
2338
2339         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2340                         0, PAGE_SIZE);
2341         encode_nops(&hdr);
2342         return 0;
2343 }
2344
2345 #if defined(CONFIG_NFS_V4_1)
2346 /*
2347  * EXCHANGE_ID request
2348  */
2349 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2350                                     struct nfs41_exchange_id_args *args)
2351 {
2352         struct xdr_stream xdr;
2353         struct compound_hdr hdr = {
2354                 .minorversion = args->client->cl_minorversion,
2355         };
2356
2357         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2358         encode_compound_hdr(&xdr, req, &hdr);
2359         encode_exchange_id(&xdr, args, &hdr);
2360         encode_nops(&hdr);
2361         return 0;
2362 }
2363
2364 /*
2365  * a CREATE_SESSION request
2366  */
2367 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2368                                        struct nfs41_create_session_args *args)
2369 {
2370         struct xdr_stream xdr;
2371         struct compound_hdr hdr = {
2372                 .minorversion = args->client->cl_minorversion,
2373         };
2374
2375         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2376         encode_compound_hdr(&xdr, req, &hdr);
2377         encode_create_session(&xdr, args, &hdr);
2378         encode_nops(&hdr);
2379         return 0;
2380 }
2381
2382 /*
2383  * a DESTROY_SESSION request
2384  */
2385 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2386                                         struct nfs4_session *session)
2387 {
2388         struct xdr_stream xdr;
2389         struct compound_hdr hdr = {
2390                 .minorversion = session->clp->cl_minorversion,
2391         };
2392
2393         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2394         encode_compound_hdr(&xdr, req, &hdr);
2395         encode_destroy_session(&xdr, session, &hdr);
2396         encode_nops(&hdr);
2397         return 0;
2398 }
2399
2400 /*
2401  * a SEQUENCE request
2402  */
2403 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2404                                  struct nfs4_sequence_args *args)
2405 {
2406         struct xdr_stream xdr;
2407         struct compound_hdr hdr = {
2408                 .minorversion = nfs4_xdr_minorversion(args),
2409         };
2410
2411         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2412         encode_compound_hdr(&xdr, req, &hdr);
2413         encode_sequence(&xdr, args, &hdr);
2414         encode_nops(&hdr);
2415         return 0;
2416 }
2417
2418 /*
2419  * a GET_LEASE_TIME request
2420  */
2421 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2422                                        struct nfs4_get_lease_time_args *args)
2423 {
2424         struct xdr_stream xdr;
2425         struct compound_hdr hdr = {
2426                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2427         };
2428         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2429
2430         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2431         encode_compound_hdr(&xdr, req, &hdr);
2432         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2433         encode_putrootfh(&xdr, &hdr);
2434         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2435         encode_nops(&hdr);
2436         return 0;
2437 }
2438 #endif /* CONFIG_NFS_V4_1 */
2439
2440 /*
2441  * START OF "GENERIC" DECODE ROUTINES.
2442  *   These may look a little ugly since they are imported from a "generic"
2443  * set of XDR encode/decode routines which are intended to be shared by
2444  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2445  *
2446  * If the pain of reading these is too great, it should be a straightforward
2447  * task to translate them into Linux-specific versions which are more
2448  * consistent with the style used in NFSv2/v3...
2449  */
2450 #define READ32(x)         (x) = ntohl(*p++)
2451 #define READ64(x)         do {                  \
2452         (x) = (u64)ntohl(*p++) << 32;           \
2453         (x) |= ntohl(*p++);                     \
2454 } while (0)
2455 #define READTIME(x)       do {                  \
2456         p++;                                    \
2457         (x.tv_sec) = ntohl(*p++);               \
2458         (x.tv_nsec) = ntohl(*p++);              \
2459 } while (0)
2460 #define COPYMEM(x,nbytes) do {                  \
2461         memcpy((x), p, nbytes);                 \
2462         p += XDR_QUADLEN(nbytes);               \
2463 } while (0)
2464
2465 #define READ_BUF(nbytes)  do { \
2466         p = xdr_inline_decode(xdr, nbytes); \
2467         if (unlikely(!p)) { \
2468                 dprintk("nfs: %s: prematurely hit end of receive" \
2469                                 " buffer\n", __func__); \
2470                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2471                                 __func__, xdr->p, nbytes, xdr->end); \
2472                 return -EIO; \
2473         } \
2474 } while (0)
2475
2476 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2477 {
2478         __be32 *p;
2479
2480         READ_BUF(4);
2481         READ32(*len);
2482         READ_BUF(*len);
2483         *string = (char *)p;
2484         return 0;
2485 }
2486
2487 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2488 {
2489         __be32 *p;
2490
2491         READ_BUF(8);
2492         READ32(hdr->status);
2493         READ32(hdr->taglen);
2494
2495         READ_BUF(hdr->taglen + 4);
2496         hdr->tag = (char *)p;
2497         p += XDR_QUADLEN(hdr->taglen);
2498         READ32(hdr->nops);
2499         if (unlikely(hdr->nops < 1))
2500                 return nfs4_stat_to_errno(hdr->status);
2501         return 0;
2502 }
2503
2504 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2505 {
2506         __be32 *p;
2507         uint32_t opnum;
2508         int32_t nfserr;
2509
2510         READ_BUF(8);
2511         READ32(opnum);
2512         if (opnum != expected) {
2513                 dprintk("nfs: Server returned operation"
2514                         " %d but we issued a request for %d\n",
2515                                 opnum, expected);
2516                 return -EIO;
2517         }
2518         READ32(nfserr);
2519         if (nfserr != NFS_OK)
2520                 return nfs4_stat_to_errno(nfserr);
2521         return 0;
2522 }
2523
2524 /* Dummy routine */
2525 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2526 {
2527         __be32 *p;
2528         unsigned int strlen;
2529         char *str;
2530
2531         READ_BUF(12);
2532         return decode_opaque_inline(xdr, &strlen, &str);
2533 }
2534
2535 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2536 {
2537         uint32_t bmlen;
2538         __be32 *p;
2539
2540         READ_BUF(4);
2541         READ32(bmlen);
2542
2543         bitmap[0] = bitmap[1] = 0;
2544         READ_BUF((bmlen << 2));
2545         if (bmlen > 0) {
2546                 READ32(bitmap[0]);
2547                 if (bmlen > 1)
2548                         READ32(bitmap[1]);
2549         }
2550         return 0;
2551 }
2552
2553 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2554 {
2555         __be32 *p;
2556
2557         READ_BUF(4);
2558         READ32(*attrlen);
2559         *savep = xdr->p;
2560         return 0;
2561 }
2562
2563 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2564 {
2565         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2566                 decode_attr_bitmap(xdr, bitmask);
2567                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2568         } else
2569                 bitmask[0] = bitmask[1] = 0;
2570         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2571         return 0;
2572 }
2573
2574 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2575 {
2576         __be32 *p;
2577         int ret = 0;
2578
2579         *type = 0;
2580         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2581                 return -EIO;
2582         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2583                 READ_BUF(4);
2584                 READ32(*type);
2585                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2586                         dprintk("%s: bad type %d\n", __func__, *type);
2587                         return -EIO;
2588                 }
2589                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2590                 ret = NFS_ATTR_FATTR_TYPE;
2591         }
2592         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2593         return ret;
2594 }
2595
2596 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2597 {
2598         __be32 *p;
2599         int ret = 0;
2600
2601         *change = 0;
2602         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2603                 return -EIO;
2604         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2605                 READ_BUF(8);
2606                 READ64(*change);
2607                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2608                 ret = NFS_ATTR_FATTR_CHANGE;
2609         }
2610         dprintk("%s: change attribute=%Lu\n", __func__,
2611                         (unsigned long long)*change);
2612         return ret;
2613 }
2614
2615 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2616 {
2617         __be32 *p;
2618         int ret = 0;
2619
2620         *size = 0;
2621         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2622                 return -EIO;
2623         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2624                 READ_BUF(8);
2625                 READ64(*size);
2626                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2627                 ret = NFS_ATTR_FATTR_SIZE;
2628         }
2629         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2630         return ret;
2631 }
2632
2633 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2634 {
2635         __be32 *p;
2636
2637         *res = 0;
2638         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2639                 return -EIO;
2640         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2641                 READ_BUF(4);
2642                 READ32(*res);
2643                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2644         }
2645         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2646         return 0;
2647 }
2648
2649 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2650 {
2651         __be32 *p;
2652
2653         *res = 0;
2654         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2655                 return -EIO;
2656         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2657                 READ_BUF(4);
2658                 READ32(*res);
2659                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2660         }
2661         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2662         return 0;
2663 }
2664
2665 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2666 {
2667         __be32 *p;
2668         int ret = 0;
2669
2670         fsid->major = 0;
2671         fsid->minor = 0;
2672         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2673                 return -EIO;
2674         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2675                 READ_BUF(16);
2676                 READ64(fsid->major);
2677                 READ64(fsid->minor);
2678                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2679                 ret = NFS_ATTR_FATTR_FSID;
2680         }
2681         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2682                         (unsigned long long)fsid->major,
2683                         (unsigned long long)fsid->minor);
2684         return ret;
2685 }
2686
2687 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2688 {
2689         __be32 *p;
2690
2691         *res = 60;
2692         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2693                 return -EIO;
2694         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2695                 READ_BUF(4);
2696                 READ32(*res);
2697                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2698         }
2699         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2700         return 0;
2701 }
2702
2703 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2704 {
2705         __be32 *p;
2706
2707         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2708         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2709                 return -EIO;
2710         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2711                 READ_BUF(4);
2712                 READ32(*res);
2713                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2714         }
2715         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2716         return 0;
2717 }
2718
2719 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2720 {
2721         __be32 *p;
2722         int ret = 0;
2723
2724         *fileid = 0;
2725         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2726                 return -EIO;
2727         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2728                 READ_BUF(8);
2729                 READ64(*fileid);
2730                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2731                 ret = NFS_ATTR_FATTR_FILEID;
2732         }
2733         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2734         return ret;
2735 }
2736
2737 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2738 {
2739         __be32 *p;
2740         int ret = 0;
2741
2742         *fileid = 0;
2743         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2744                 return -EIO;
2745         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2746                 READ_BUF(8);
2747                 READ64(*fileid);
2748                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2749                 ret = NFS_ATTR_FATTR_FILEID;
2750         }
2751         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2752         return ret;
2753 }
2754
2755 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2756 {
2757         __be32 *p;
2758         int status = 0;
2759
2760         *res = 0;
2761         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2762                 return -EIO;
2763         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2764                 READ_BUF(8);
2765                 READ64(*res);
2766                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2767         }
2768         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2769         return status;
2770 }
2771
2772 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2773 {
2774         __be32 *p;
2775         int status = 0;
2776
2777         *res = 0;
2778         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2779                 return -EIO;
2780         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2781                 READ_BUF(8);
2782                 READ64(*res);
2783                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2784         }
2785         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2786         return status;
2787 }
2788
2789 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2790 {
2791         __be32 *p;
2792         int status = 0;
2793
2794         *res = 0;
2795         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2796                 return -EIO;
2797         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2798                 READ_BUF(8);
2799                 READ64(*res);
2800                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2801         }
2802         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2803         return status;
2804 }
2805
2806 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2807 {
2808         u32 n;
2809         __be32 *p;
2810         int status = 0;
2811
2812         READ_BUF(4);
2813         READ32(n);
2814         if (n == 0)
2815                 goto root_path;
2816         dprintk("path ");
2817         path->ncomponents = 0;
2818         while (path->ncomponents < n) {
2819                 struct nfs4_string *component = &path->components[path->ncomponents];
2820                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2821                 if (unlikely(status != 0))
2822                         goto out_eio;
2823                 if (path->ncomponents != n)
2824                         dprintk("/");
2825                 dprintk("%s", component->data);
2826                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2827                         path->ncomponents++;
2828                 else {
2829                         dprintk("cannot parse %d components in path\n", n);
2830                         goto out_eio;
2831                 }
2832         }
2833 out:
2834         dprintk("\n");
2835         return status;
2836 root_path:
2837 /* a root pathname is sent as a zero component4 */
2838         path->ncomponents = 1;
2839         path->components[0].len=0;
2840         path->components[0].data=NULL;
2841         dprintk("path /\n");
2842         goto out;
2843 out_eio:
2844         dprintk(" status %d", status);
2845         status = -EIO;
2846         goto out;
2847 }
2848
2849 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2850 {
2851         int n;
2852         __be32 *p;
2853         int status = -EIO;
2854
2855         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2856                 goto out;
2857         status = 0;
2858         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2859                 goto out;
2860         dprintk("%s: fsroot ", __func__);
2861         status = decode_pathname(xdr, &res->fs_path);
2862         if (unlikely(status != 0))
2863                 goto out;
2864         READ_BUF(4);
2865         READ32(n);
2866         if (n <= 0)
2867                 goto out_eio;
2868         res->nlocations = 0;
2869         while (res->nlocations < n) {
2870                 u32 m;
2871                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2872
2873                 READ_BUF(4);
2874                 READ32(m);
2875
2876                 loc->nservers = 0;
2877                 dprintk("%s: servers ", __func__);
2878                 while (loc->nservers < m) {
2879                         struct nfs4_string *server = &loc->servers[loc->nservers];
2880                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2881                         if (unlikely(status != 0))
2882                                 goto out_eio;
2883                         dprintk("%s ", server->data);
2884                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2885                                 loc->nservers++;
2886                         else {
2887                                 unsigned int i;
2888                                 dprintk("%s: using first %u of %u servers "
2889                                         "returned for location %u\n",
2890                                                 __func__,
2891                                                 NFS4_FS_LOCATION_MAXSERVERS,
2892                                                 m, res->nlocations);
2893                                 for (i = loc->nservers; i < m; i++) {
2894                                         unsigned int len;
2895                                         char *data;
2896                                         status = decode_opaque_inline(xdr, &len, &data);
2897                                         if (unlikely(status != 0))
2898                                                 goto out_eio;
2899                                 }
2900                         }
2901                 }
2902                 status = decode_pathname(xdr, &loc->rootpath);
2903                 if (unlikely(status != 0))
2904                         goto out_eio;
2905                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2906                         res->nlocations++;
2907         }
2908         if (res->nlocations != 0)
2909                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2910 out:
2911         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2912         return status;
2913 out_eio:
2914         status = -EIO;
2915         goto out;
2916 }
2917
2918 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2919 {
2920         __be32 *p;
2921         int status = 0;
2922
2923         *res = 0;
2924         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2925                 return -EIO;
2926         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2927                 READ_BUF(8);
2928                 READ64(*res);
2929                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2930         }
2931         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2932         return status;
2933 }
2934
2935 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2936 {
2937         __be32 *p;
2938         int status = 0;
2939
2940         *maxlink = 1;
2941         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2942                 return -EIO;
2943         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2944                 READ_BUF(4);
2945                 READ32(*maxlink);
2946                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2947         }
2948         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2949         return status;
2950 }
2951
2952 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2953 {
2954         __be32 *p;
2955         int status = 0;
2956
2957         *maxname = 1024;
2958         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2959                 return -EIO;
2960         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2961                 READ_BUF(4);
2962                 READ32(*maxname);
2963                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2964         }
2965         dprintk("%s: maxname=%u\n", __func__, *maxname);
2966         return status;
2967 }
2968
2969 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2970 {
2971         __be32 *p;
2972         int status = 0;
2973
2974         *res = 1024;
2975         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2976                 return -EIO;
2977         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2978                 uint64_t maxread;
2979                 READ_BUF(8);
2980                 READ64(maxread);
2981                 if (maxread > 0x7FFFFFFF)
2982                         maxread = 0x7FFFFFFF;
2983                 *res = (uint32_t)maxread;
2984                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2985         }
2986         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2987         return status;
2988 }
2989
2990 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2991 {
2992         __be32 *p;
2993         int status = 0;
2994
2995         *res = 1024;
2996         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2997                 return -EIO;
2998         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2999                 uint64_t maxwrite;
3000                 READ_BUF(8);
3001                 READ64(maxwrite);
3002                 if (maxwrite > 0x7FFFFFFF)
3003                         maxwrite = 0x7FFFFFFF;
3004                 *res = (uint32_t)maxwrite;
3005                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3006         }
3007         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3008         return status;
3009 }
3010
3011 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3012 {
3013         uint32_t tmp;
3014         __be32 *p;
3015         int ret = 0;
3016
3017         *mode = 0;
3018         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3019                 return -EIO;
3020         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3021                 READ_BUF(4);
3022                 READ32(tmp);
3023                 *mode = tmp & ~S_IFMT;
3024                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3025                 ret = NFS_ATTR_FATTR_MODE;
3026         }
3027         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3028         return ret;
3029 }
3030
3031 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3032 {
3033         __be32 *p;
3034         int ret = 0;
3035
3036         *nlink = 1;
3037         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3038                 return -EIO;
3039         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3040                 READ_BUF(4);
3041                 READ32(*nlink);
3042                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3043                 ret = NFS_ATTR_FATTR_NLINK;
3044         }
3045         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3046         return ret;
3047 }
3048
3049 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3050 {
3051         uint32_t len;
3052         __be32 *p;
3053         int ret = 0;
3054
3055         *uid = -2;
3056         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3057                 return -EIO;
3058         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3059                 READ_BUF(4);
3060                 READ32(len);
3061                 READ_BUF(len);
3062                 if (len < XDR_MAX_NETOBJ) {
3063                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3064                                 ret = NFS_ATTR_FATTR_OWNER;
3065                         else
3066                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3067                                                 __func__);
3068                 } else
3069                         dprintk("%s: name too long (%u)!\n",
3070                                         __func__, len);
3071                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3072         }
3073         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3074         return ret;
3075 }
3076
3077 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3078 {
3079         uint32_t len;
3080         __be32 *p;
3081         int ret = 0;
3082
3083         *gid = -2;
3084         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3085                 return -EIO;
3086         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3087                 READ_BUF(4);
3088                 READ32(len);
3089                 READ_BUF(len);
3090                 if (len < XDR_MAX_NETOBJ) {
3091                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3092                                 ret = NFS_ATTR_FATTR_GROUP;
3093                         else
3094                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3095                                                 __func__);
3096                 } else
3097                         dprintk("%s: name too long (%u)!\n",
3098                                         __func__, len);
3099                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3100         }
3101         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3102         return ret;
3103 }
3104
3105 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3106 {
3107         uint32_t major = 0, minor = 0;
3108         __be32 *p;
3109         int ret = 0;
3110
3111         *rdev = MKDEV(0,0);
3112         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3113                 return -EIO;
3114         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3115                 dev_t tmp;
3116
3117                 READ_BUF(8);
3118                 READ32(major);
3119                 READ32(minor);
3120                 tmp = MKDEV(major, minor);
3121                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3122                         *rdev = tmp;
3123                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3124                 ret = NFS_ATTR_FATTR_RDEV;
3125         }
3126         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3127         return ret;
3128 }
3129
3130 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3131 {
3132         __be32 *p;
3133         int status = 0;
3134
3135         *res = 0;
3136         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3137                 return -EIO;
3138         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3139                 READ_BUF(8);
3140                 READ64(*res);
3141                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3142         }
3143         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3144         return status;
3145 }
3146
3147 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3148 {
3149         __be32 *p;
3150         int status = 0;
3151
3152         *res = 0;
3153         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3154                 return -EIO;
3155         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3156                 READ_BUF(8);
3157                 READ64(*res);
3158                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3159         }
3160         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3161         return status;
3162 }
3163
3164 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3165 {
3166         __be32 *p;
3167         int status = 0;
3168
3169         *res = 0;
3170         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3171                 return -EIO;
3172         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3173                 READ_BUF(8);
3174                 READ64(*res);
3175                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3176         }
3177         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3178         return status;
3179 }
3180
3181 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3182 {
3183         __be32 *p;
3184         int ret = 0;
3185
3186         *used = 0;
3187         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3188                 return -EIO;
3189         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3190                 READ_BUF(8);
3191                 READ64(*used);
3192                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3193                 ret = NFS_ATTR_FATTR_SPACE_USED;
3194         }
3195         dprintk("%s: space used=%Lu\n", __func__,
3196                         (unsigned long long)*used);
3197         return ret;
3198 }
3199
3200 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3201 {
3202         __be32 *p;
3203         uint64_t sec;
3204         uint32_t nsec;
3205
3206         READ_BUF(12);
3207         READ64(sec);
3208         READ32(nsec);
3209         time->tv_sec = (time_t)sec;
3210         time->tv_nsec = (long)nsec;
3211         return 0;
3212 }
3213
3214 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3215 {
3216         int status = 0;
3217
3218         time->tv_sec = 0;
3219         time->tv_nsec = 0;
3220         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3221                 return -EIO;
3222         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3223                 status = decode_attr_time(xdr, time);
3224                 if (status == 0)
3225                         status = NFS_ATTR_FATTR_ATIME;
3226                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3227         }
3228         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3229         return status;
3230 }
3231
3232 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3233 {
3234         int status = 0;
3235
3236         time->tv_sec = 0;
3237         time->tv_nsec = 0;
3238         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3241                 status = decode_attr_time(xdr, time);
3242                 if (status == 0)
3243                         status = NFS_ATTR_FATTR_CTIME;
3244                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3245         }
3246         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3247         return status;
3248 }
3249
3250 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3251 {
3252         int status = 0;
3253
3254         time->tv_sec = 0;
3255         time->tv_nsec = 0;
3256         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3257                 return -EIO;
3258         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3259                 status = decode_attr_time(xdr, time);
3260                 if (status == 0)
3261                         status = NFS_ATTR_FATTR_MTIME;
3262                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3263         }
3264         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3265         return status;
3266 }
3267
3268 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3269 {
3270         unsigned int attrwords = XDR_QUADLEN(attrlen);
3271         unsigned int nwords = xdr->p - savep;
3272
3273         if (unlikely(attrwords != nwords)) {
3274                 dprintk("%s: server returned incorrect attribute length: "
3275                         "%u %c %u\n",
3276                                 __func__,
3277                                 attrwords << 2,
3278                                 (attrwords < nwords) ? '<' : '>',
3279                                 nwords << 2);
3280                 return -EIO;
3281         }
3282         return 0;
3283 }
3284
3285 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3286 {
3287         __be32 *p;
3288
3289         READ_BUF(20);
3290         READ32(cinfo->atomic);
3291         READ64(cinfo->before);
3292         READ64(cinfo->after);
3293         return 0;
3294 }
3295
3296 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3297 {
3298         __be32 *p;
3299         uint32_t supp, acc;
3300         int status;
3301
3302         status = decode_op_hdr(xdr, OP_ACCESS);
3303         if (status)
3304                 return status;
3305         READ_BUF(8);
3306         READ32(supp);
3307         READ32(acc);
3308         access->supported = supp;
3309         access->access = acc;
3310         return 0;
3311 }
3312
3313 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3314 {
3315         __be32 *p;
3316         int status;
3317
3318         status = decode_op_hdr(xdr, OP_CLOSE);
3319         if (status != -EIO)
3320                 nfs_increment_open_seqid(status, res->seqid);
3321         if (status)
3322                 return status;
3323         READ_BUF(NFS4_STATEID_SIZE);
3324         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3325         return 0;
3326 }
3327
3328 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3329 {
3330         __be32 *p;
3331         int status;
3332
3333         status = decode_op_hdr(xdr, OP_COMMIT);
3334         if (status)
3335                 return status;
3336         READ_BUF(8);
3337         COPYMEM(res->verf->verifier, 8);
3338         return 0;
3339 }
3340
3341 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3342 {
3343         __be32 *p;
3344         uint32_t bmlen;
3345         int status;
3346
3347         status = decode_op_hdr(xdr, OP_CREATE);
3348         if (status)
3349                 return status;
3350         if ((status = decode_change_info(xdr, cinfo)))
3351                 return status;
3352         READ_BUF(4);
3353         READ32(bmlen);
3354         READ_BUF(bmlen << 2);
3355         return 0;
3356 }
3357
3358 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3359 {
3360         __be32 *savep;
3361         uint32_t attrlen, bitmap[2] = {0};
3362         int status;
3363
3364         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3365                 goto xdr_error;
3366         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3367                 goto xdr_error;
3368         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3369                 goto xdr_error;
3370         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3371                 goto xdr_error;
3372         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3373                 goto xdr_error;
3374         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3375                 goto xdr_error;
3376         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3377                 goto xdr_error;
3378         status = verify_attr_len(xdr, savep, attrlen);
3379 xdr_error:
3380         dprintk("%s: xdr returned %d!\n", __func__, -status);
3381         return status;
3382 }
3383
3384 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3385 {
3386         __be32 *savep;
3387         uint32_t attrlen, bitmap[2] = {0};
3388         int status;
3389
3390         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3391                 goto xdr_error;
3392         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3393                 goto xdr_error;
3394         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3395                 goto xdr_error;
3396
3397         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3398                 goto xdr_error;
3399         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3400                 goto xdr_error;
3401         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3402                 goto xdr_error;
3403         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3404                 goto xdr_error;
3405         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3406                 goto xdr_error;
3407         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3408                 goto xdr_error;
3409
3410         status = verify_attr_len(xdr, savep, attrlen);
3411 xdr_error:
3412         dprintk("%s: xdr returned %d!\n", __func__, -status);
3413         return status;
3414 }
3415
3416 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3417 {
3418         __be32 *savep;
3419         uint32_t attrlen, bitmap[2] = {0};
3420         int status;
3421
3422         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3423                 goto xdr_error;
3424         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3425                 goto xdr_error;
3426         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3427                 goto xdr_error;
3428
3429         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3430                 goto xdr_error;
3431         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3432                 goto xdr_error;
3433
3434         status = verify_attr_len(xdr, savep, attrlen);
3435 xdr_error:
3436         dprintk("%s: xdr returned %d!\n", __func__, -status);
3437         return status;
3438 }
3439
3440 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3441 {
3442         __be32 *savep;
3443         uint32_t attrlen,
3444                  bitmap[2] = {0},
3445                  type;
3446         int status;
3447         umode_t fmode = 0;
3448         uint64_t fileid;
3449
3450         status = decode_op_hdr(xdr, OP_GETATTR);
3451         if (status < 0)
3452                 goto xdr_error;
3453
3454         status = decode_attr_bitmap(xdr, bitmap);
3455         if (status < 0)
3456                 goto xdr_error;
3457
3458         status = decode_attr_length(xdr, &attrlen, &savep);
3459         if (status < 0)
3460                 goto xdr_error;
3461
3462
3463         status = decode_attr_type(xdr, bitmap, &type);
3464         if (status < 0)
3465                 goto xdr_error;
3466         fattr->mode = 0;
3467         if (status != 0) {
3468                 fattr->mode |= nfs_type2fmt[type];
3469                 fattr->valid |= status;
3470         }
3471
3472         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3473         if (status < 0)
3474                 goto xdr_error;
3475         fattr->valid |= status;
3476
3477         status = decode_attr_size(xdr, bitmap, &fattr->size);
3478         if (status < 0)
3479                 goto xdr_error;
3480         fattr->valid |= status;
3481
3482         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3483         if (status < 0)
3484                 goto xdr_error;
3485         fattr->valid |= status;
3486
3487         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3488         if (status < 0)
3489                 goto xdr_error;
3490         fattr->valid |= status;
3491
3492         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3493                                                 struct nfs4_fs_locations,
3494                                                 fattr));
3495         if (status < 0)
3496                 goto xdr_error;
3497         fattr->valid |= status;
3498
3499         status = decode_attr_mode(xdr, bitmap, &fmode);
3500         if (status < 0)
3501                 goto xdr_error;
3502         if (status != 0) {
3503                 fattr->mode |= fmode;
3504                 fattr->valid |= status;
3505         }
3506
3507         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3508         if (status < 0)
3509                 goto xdr_error;
3510         fattr->valid |= status;
3511
3512         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3513         if (status < 0)
3514                 goto xdr_error;
3515         fattr->valid |= status;
3516
3517         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3518         if (status < 0)
3519                 goto xdr_error;
3520         fattr->valid |= status;
3521
3522         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3523         if (status < 0)
3524                 goto xdr_error;
3525         fattr->valid |= status;
3526
3527         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3528         if (status < 0)
3529                 goto xdr_error;
3530         fattr->valid |= status;
3531
3532         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3533         if (status < 0)
3534                 goto xdr_error;
3535         fattr->valid |= status;
3536
3537         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3538         if (status < 0)
3539                 goto xdr_error;
3540         fattr->valid |= status;
3541
3542         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3543         if (status < 0)
3544                 goto xdr_error;
3545         fattr->valid |= status;
3546
3547         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3548         if (status < 0)
3549                 goto xdr_error;
3550         if (status != 0 && !(fattr->valid & status)) {
3551                 fattr->fileid = fileid;
3552                 fattr->valid |= status;
3553         }
3554
3555         status = verify_attr_len(xdr, savep, attrlen);
3556 xdr_error:
3557         dprintk("%s: xdr returned %d\n", __func__, -status);
3558         return status;
3559 }
3560
3561
3562 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3563 {
3564         __be32 *savep;
3565         uint32_t attrlen, bitmap[2];
3566         int status;
3567
3568         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3569                 goto xdr_error;
3570         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3571                 goto xdr_error;
3572         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3573                 goto xdr_error;
3574
3575         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3576
3577         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3578                 goto xdr_error;
3579         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3580                 goto xdr_error;
3581         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3582                 goto xdr_error;
3583         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3584         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3585                 goto xdr_error;
3586         fsinfo->wtpref = fsinfo->wtmax;
3587
3588         status = verify_attr_len(xdr, savep, attrlen);
3589 xdr_error:
3590         dprintk("%s: xdr returned %d!\n", __func__, -status);
3591         return status;
3592 }
3593
3594 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3595 {
3596         __be32 *p;
3597         uint32_t len;
3598         int status;
3599
3600         /* Zero handle first to allow comparisons */
3601         memset(fh, 0, sizeof(*fh));
3602
3603         status = decode_op_hdr(xdr, OP_GETFH);
3604         if (status)
3605                 return status;
3606
3607         READ_BUF(4);
3608         READ32(len);
3609         if (len > NFS4_FHSIZE)
3610                 return -EIO;
3611         fh->size = len;
3612         READ_BUF(len);
3613         COPYMEM(fh->data, len);
3614         return 0;
3615 }
3616
3617 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3618 {
3619         int status;
3620
3621         status = decode_op_hdr(xdr, OP_LINK);
3622         if (status)
3623                 return status;
3624         return decode_change_info(xdr, cinfo);
3625 }
3626
3627 /*
3628  * We create the owner, so we know a proper owner.id length is 4.
3629  */
3630 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3631 {
3632         uint64_t offset, length, clientid;
3633         __be32 *p;
3634         uint32_t namelen, type;
3635
3636         READ_BUF(32);
3637         READ64(offset);
3638         READ64(length);
3639         READ32(type);
3640         if (fl != NULL) {
3641                 fl->fl_start = (loff_t)offset;
3642                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3643                 if (length == ~(uint64_t)0)
3644                         fl->fl_end = OFFSET_MAX;
3645                 fl->fl_type = F_WRLCK;
3646                 if (type & 1)
3647                         fl->fl_type = F_RDLCK;
3648                 fl->fl_pid = 0;
3649         }
3650         READ64(clientid);
3651         READ32(namelen);
3652         READ_BUF(namelen);
3653         return -NFS4ERR_DENIED;
3654 }
3655
3656 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3657 {
3658         __be32 *p;
3659         int status;
3660
3661         status = decode_op_hdr(xdr, OP_LOCK);
3662         if (status == -EIO)
3663                 goto out;
3664         if (status == 0) {
3665                 READ_BUF(NFS4_STATEID_SIZE);
3666                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3667         } else if (status == -NFS4ERR_DENIED)
3668                 status = decode_lock_denied(xdr, NULL);
3669         if (res->open_seqid != NULL)
3670                 nfs_increment_open_seqid(status, res->open_seqid);
3671         nfs_increment_lock_seqid(status, res->lock_seqid);
3672 out:
3673         return status;
3674 }
3675
3676 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3677 {
3678         int status;
3679         status = decode_op_hdr(xdr, OP_LOCKT);
3680         if (status == -NFS4ERR_DENIED)
3681                 return decode_lock_denied(xdr, res->denied);
3682         return status;
3683 }
3684
3685 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3686 {
3687         __be32 *p;
3688         int status;
3689
3690         status = decode_op_hdr(xdr, OP_LOCKU);
3691         if (status != -EIO)
3692                 nfs_increment_lock_seqid(status, res->seqid);
3693         if (status == 0) {
3694                 READ_BUF(NFS4_STATEID_SIZE);
3695                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3696         }
3697         return status;
3698 }
3699
3700 static int decode_lookup(struct xdr_stream *xdr)
3701 {
3702         return decode_op_hdr(xdr, OP_LOOKUP);
3703 }
3704
3705 /* This is too sick! */
3706 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3707 {
3708         __be32 *p;
3709         uint32_t limit_type, nblocks, blocksize;
3710
3711         READ_BUF(12);
3712         READ32(limit_type);
3713         switch (limit_type) {
3714         case 1:
3715                 READ64(*maxsize);
3716                 break;
3717         case 2:
3718                 READ32(nblocks);
3719                 READ32(blocksize);
3720                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3721         }
3722         return 0;
3723 }
3724
3725 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3726 {
3727         __be32 *p;
3728         uint32_t delegation_type;
3729
3730         READ_BUF(4);
3731         READ32(delegation_type);
3732         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3733                 res->delegation_type = 0;
3734                 return 0;
3735         }
3736         READ_BUF(NFS4_STATEID_SIZE+4);
3737         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3738         READ32(res->do_recall);
3739
3740         switch (delegation_type) {
3741         case NFS4_OPEN_DELEGATE_READ:
3742                 res->delegation_type = FMODE_READ;
3743                 break;
3744         case NFS4_OPEN_DELEGATE_WRITE:
3745                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3746                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3747                                 return -EIO;
3748         }
3749         return decode_ace(xdr, NULL, res->server->nfs_client);
3750 }
3751
3752 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3753 {
3754         __be32 *p;
3755         uint32_t savewords, bmlen, i;
3756         int status;
3757
3758         status = decode_op_hdr(xdr, OP_OPEN);
3759         if (status != -EIO)
3760                 nfs_increment_open_seqid(status, res->seqid);
3761         if (status)
3762                 return status;
3763         READ_BUF(NFS4_STATEID_SIZE);
3764         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3765
3766         decode_change_info(xdr, &res->cinfo);
3767
3768         READ_BUF(8);
3769         READ32(res->rflags);
3770         READ32(bmlen);
3771         if (bmlen > 10)
3772                 goto xdr_error;
3773
3774         READ_BUF(bmlen << 2);
3775         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3776         for (i = 0; i < savewords; ++i)
3777                 READ32(res->attrset[i]);
3778         for (; i < NFS4_BITMAP_SIZE; i++)
3779                 res->attrset[i] = 0;
3780
3781         return decode_delegation(xdr, res);
3782 xdr_error:
3783         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3784         return -EIO;
3785 }
3786
3787 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3788 {
3789         __be32 *p;
3790         int status;
3791
3792         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3793         if (status != -EIO)
3794                 nfs_increment_open_seqid(status, res->seqid);
3795         if (status)
3796                 return status;
3797         READ_BUF(NFS4_STATEID_SIZE);
3798         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3799         return 0;
3800 }
3801
3802 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3803 {
3804         __be32 *p;
3805         int status;
3806
3807         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3808         if (status != -EIO)
3809                 nfs_increment_open_seqid(status, res->seqid);
3810         if (status)
3811                 return status;
3812         READ_BUF(NFS4_STATEID_SIZE);
3813         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3814         return 0;
3815 }
3816
3817 static int decode_putfh(struct xdr_stream *xdr)
3818 {
3819         return decode_op_hdr(xdr, OP_PUTFH);
3820 }
3821
3822 static int decode_putrootfh(struct xdr_stream *xdr)
3823 {
3824         return decode_op_hdr(xdr, OP_PUTROOTFH);
3825 }
3826
3827 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3828 {
3829         struct kvec *iov = req->rq_rcv_buf.head;
3830         __be32 *p;
3831         uint32_t count, eof, recvd, hdrlen;
3832         int status;
3833
3834         status = decode_op_hdr(xdr, OP_READ);
3835         if (status)
3836                 return status;
3837         READ_BUF(8);
3838         READ32(eof);
3839         READ32(count);
3840         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3841         recvd = req->rq_rcv_buf.len - hdrlen;
3842         if (count > recvd) {
3843                 dprintk("NFS: server cheating in read reply: "
3844                                 "count %u > recvd %u\n", count, recvd);
3845                 count = recvd;
3846                 eof = 0;
3847         }
3848         xdr_read_pages(xdr, count);
3849         res->eof = eof;
3850         res->count = count;
3851         return 0;
3852 }
3853
3854 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3855 {
3856         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3857         struct page     *page = *rcvbuf->pages;
3858         struct kvec     *iov = rcvbuf->head;
3859         size_t          hdrlen;
3860         u32             recvd, pglen = rcvbuf->page_len;
3861         __be32          *end, *entry, *p, *kaddr;
3862         unsigned int    nr = 0;
3863         int             status;
3864
3865         status = decode_op_hdr(xdr, OP_READDIR);
3866         if (status)
3867                 return status;
3868         READ_BUF(8);
3869         COPYMEM(readdir->verifier.data, 8);
3870         dprintk("%s: verifier = %08x:%08x\n",
3871                         __func__,
3872                         ((u32 *)readdir->verifier.data)[0],
3873                         ((u32 *)readdir->verifier.data)[1]);
3874
3875
3876         hdrlen = (char *) p - (char *) iov->iov_base;
3877         recvd = rcvbuf->len - hdrlen;
3878         if (pglen > recvd)
3879                 pglen = recvd;
3880         xdr_read_pages(xdr, pglen);
3881
3882         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3883         kaddr = p = kmap_atomic(page, KM_USER0);
3884         end = p + ((pglen + readdir->pgbase) >> 2);
3885         entry = p;
3886
3887         /* Make sure the packet actually has a value_follows and EOF entry */
3888         if ((entry + 1) > end)
3889                 goto short_pkt;
3890
3891         for (; *p++; nr++) {
3892                 u32 len, attrlen, xlen;
3893                 if (end - p < 3)
3894                         goto short_pkt;
3895                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3896                 p += 2;                 /* cookie */
3897                 len = ntohl(*p++);      /* filename length */
3898                 if (len > NFS4_MAXNAMLEN) {
3899                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3900                                         len);
3901                         goto err_unmap;
3902                 }
3903                 xlen = XDR_QUADLEN(len);
3904                 if (end - p < xlen + 1)
3905                         goto short_pkt;
3906                 dprintk("filename = %*s\n", len, (char *)p);
3907                 p += xlen;
3908                 len = ntohl(*p++);      /* bitmap length */
3909                 if (end - p < len + 1)
3910                         goto short_pkt;
3911                 p += len;
3912                 attrlen = XDR_QUADLEN(ntohl(*p++));
3913                 if (end - p < attrlen + 2)
3914                         goto short_pkt;
3915                 p += attrlen;           /* attributes */
3916                 entry = p;
3917         }
3918         /*
3919          * Apparently some server sends responses that are a valid size, but
3920          * contain no entries, and have value_follows==0 and EOF==0. For
3921          * those, just set the EOF marker.
3922          */
3923         if (!nr && entry[1] == 0) {
3924                 dprintk("NFS: readdir reply truncated!\n");
3925                 entry[1] = 1;
3926         }
3927 out:
3928         kunmap_atomic(kaddr, KM_USER0);
3929         return 0;
3930 short_pkt:
3931         /*
3932          * When we get a short packet there are 2 possibilities. We can
3933          * return an error, or fix up the response to look like a valid
3934          * response and return what we have so far. If there are no
3935          * entries and the packet was short, then return -EIO. If there
3936          * are valid entries in the response, return them and pretend that
3937          * the call was successful, but incomplete. The caller can retry the
3938          * readdir starting at the last cookie.
3939          */
3940         dprintk("%s: short packet at entry %d\n", __func__, nr);
3941         entry[0] = entry[1] = 0;
3942         if (nr)
3943                 goto out;
3944 err_unmap:
3945         kunmap_atomic(kaddr, KM_USER0);
3946         return -errno_NFSERR_IO;
3947 }
3948
3949 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3950 {
3951         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3952         struct kvec *iov = rcvbuf->head;
3953         size_t hdrlen;
3954         u32 len, recvd;
3955         __be32 *p;
3956         char *kaddr;
3957         int status;
3958
3959         status = decode_op_hdr(xdr, OP_READLINK);
3960         if (status)
3961                 return status;
3962
3963         /* Convert length of symlink */
3964         READ_BUF(4);
3965         READ32(len);
3966         if (len >= rcvbuf->page_len || len <= 0) {
3967                 dprintk("nfs: server returned giant symlink!\n");
3968                 return -ENAMETOOLONG;
3969         }
3970         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3971         recvd = req->rq_rcv_buf.len - hdrlen;
3972         if (recvd < len) {
3973                 dprintk("NFS: server cheating in readlink reply: "
3974                                 "count %u > recvd %u\n", len, recvd);
3975                 return -EIO;
3976         }
3977         xdr_read_pages(xdr, len);
3978         /*
3979          * The XDR encode routine has set things up so that
3980          * the link text will be copied directly into the
3981          * buffer.  We just have to do overflow-checking,
3982          * and and null-terminate the text (the VFS expects
3983          * null-termination).
3984          */
3985         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3986         kaddr[len+rcvbuf->page_base] = '\0';
3987         kunmap_atomic(kaddr, KM_USER0);
3988         return 0;
3989 }
3990
3991 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3992 {
3993         int status;
3994
3995         status = decode_op_hdr(xdr, OP_REMOVE);
3996         if (status)
3997                 goto out;
3998         status = decode_change_info(xdr, cinfo);
3999 out:
4000         return status;
4001 }
4002
4003 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4004               struct nfs4_change_info *new_cinfo)
4005 {
4006         int status;
4007
4008         status = decode_op_hdr(xdr, OP_RENAME);
4009         if (status)
4010                 goto out;
4011         if ((status = decode_change_info(xdr, old_cinfo)))
4012                 goto out;
4013         status = decode_change_info(xdr, new_cinfo);
4014 out:
4015         return status;
4016 }
4017
4018 static int decode_renew(struct xdr_stream *xdr)
4019 {
4020         return decode_op_hdr(xdr, OP_RENEW);
4021 }
4022
4023 static int
4024 decode_restorefh(struct xdr_stream *xdr)
4025 {
4026         return decode_op_hdr(xdr, OP_RESTOREFH);
4027 }
4028
4029 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4030                 size_t *acl_len)
4031 {
4032         __be32 *savep;
4033         uint32_t attrlen,
4034                  bitmap[2] = {0};
4035         struct kvec *iov = req->rq_rcv_buf.head;
4036         int status;
4037
4038         *acl_len = 0;
4039         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4040                 goto out;
4041         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4042                 goto out;
4043         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4044                 goto out;
4045
4046         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4047                 return -EIO;
4048         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4049                 size_t hdrlen;
4050                 u32 recvd;
4051
4052                 /* We ignore &savep and don't do consistency checks on
4053                  * the attr length.  Let userspace figure it out.... */
4054                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4055                 recvd = req->rq_rcv_buf.len - hdrlen;
4056                 if (attrlen > recvd) {
4057                         dprintk("NFS: server cheating in getattr"
4058                                         " acl reply: attrlen %u > recvd %u\n",
4059                                         attrlen, recvd);
4060                         return -EINVAL;
4061                 }
4062                 xdr_read_pages(xdr, attrlen);
4063                 *acl_len = attrlen;
4064         } else
4065                 status = -EOPNOTSUPP;
4066
4067 out:
4068         return status;
4069 }
4070
4071 static int
4072 decode_savefh(struct xdr_stream *xdr)
4073 {
4074         return decode_op_hdr(xdr, OP_SAVEFH);
4075 }
4076
4077 static int decode_setattr(struct xdr_stream *xdr)
4078 {
4079         __be32 *p;
4080         uint32_t bmlen;
4081         int status;
4082
4083         status = decode_op_hdr(xdr, OP_SETATTR);
4084         if (status)
4085                 return status;
4086         READ_BUF(4);
4087         READ32(bmlen);
4088         READ_BUF(bmlen << 2);
4089         return 0;
4090 }
4091
4092 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4093 {
4094         __be32 *p;
4095         uint32_t opnum;
4096         int32_t nfserr;
4097
4098         READ_BUF(8);
4099         READ32(opnum);
4100         if (opnum != OP_SETCLIENTID) {
4101                 dprintk("nfs: decode_setclientid: Server returned operation"
4102                         " %d\n", opnum);
4103                 return -EIO;
4104         }
4105         READ32(nfserr);
4106         if (nfserr == NFS_OK) {
4107                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4108                 READ64(clp->cl_clientid);
4109                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4110         } else if (nfserr == NFSERR_CLID_INUSE) {
4111                 uint32_t len;
4112
4113                 /* skip netid string */
4114                 READ_BUF(4);
4115                 READ32(len);
4116                 READ_BUF(len);
4117
4118                 /* skip uaddr string */
4119                 READ_BUF(4);
4120                 READ32(len);
4121                 READ_BUF(len);
4122                 return -NFSERR_CLID_INUSE;
4123         } else
4124                 return nfs4_stat_to_errno(nfserr);
4125
4126         return 0;
4127 }
4128
4129 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4130 {
4131         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4132 }
4133
4134 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4135 {
4136         __be32 *p;
4137         int status;
4138
4139         status = decode_op_hdr(xdr, OP_WRITE);
4140         if (status)
4141                 return status;
4142
4143         READ_BUF(16);
4144         READ32(res->count);
4145         READ32(res->verf->committed);
4146         COPYMEM(res->verf->verifier, 8);
4147         return 0;
4148 }
4149
4150 static int decode_delegreturn(struct xdr_stream *xdr)
4151 {
4152         return decode_op_hdr(xdr, OP_DELEGRETURN);
4153 }
4154
4155 #if defined(CONFIG_NFS_V4_1)
4156 static int decode_exchange_id(struct xdr_stream *xdr,
4157                               struct nfs41_exchange_id_res *res)
4158 {
4159         __be32 *p;
4160         uint32_t dummy;
4161         int status;
4162         struct nfs_client *clp = res->client;
4163
4164         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4165         if (status)
4166                 return status;
4167
4168         READ_BUF(8);
4169         READ64(clp->cl_ex_clid);
4170         READ_BUF(12);
4171         READ32(clp->cl_seqid);
4172         READ32(clp->cl_exchange_flags);
4173
4174         /* We ask for SP4_NONE */
4175         READ32(dummy);
4176         if (dummy != SP4_NONE)
4177                 return -EIO;
4178
4179         /* Throw away minor_id */
4180         READ_BUF(8);
4181
4182         /* Throw away Major id */
4183         READ_BUF(4);
4184         READ32(dummy);
4185         READ_BUF(dummy);
4186
4187         /* Throw away server_scope */
4188         READ_BUF(4);
4189         READ32(dummy);
4190         READ_BUF(dummy);
4191
4192         /* Throw away Implementation id array */
4193         READ_BUF(4);
4194         READ32(dummy);
4195         READ_BUF(dummy);
4196
4197         return 0;
4198 }
4199
4200 static int decode_chan_attrs(struct xdr_stream *xdr,
4201                              struct nfs4_channel_attrs *attrs)
4202 {
4203         __be32 *p;
4204         u32 nr_attrs;
4205
4206         READ_BUF(28);
4207         READ32(attrs->headerpadsz);
4208         READ32(attrs->max_rqst_sz);
4209         READ32(attrs->max_resp_sz);
4210         READ32(attrs->max_resp_sz_cached);
4211         READ32(attrs->max_ops);
4212         READ32(attrs->max_reqs);
4213         READ32(nr_attrs);
4214         if (unlikely(nr_attrs > 1)) {
4215                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4216                         __func__, nr_attrs);
4217                 return -EINVAL;
4218         }
4219         if (nr_attrs == 1)
4220                 READ_BUF(4); /* skip rdma_attrs */
4221         return 0;
4222 }
4223
4224 static int decode_create_session(struct xdr_stream *xdr,
4225                                  struct nfs41_create_session_res *res)
4226 {
4227         __be32 *p;
4228         int status;
4229         struct nfs_client *clp = res->client;
4230         struct nfs4_session *session = clp->cl_session;
4231
4232         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4233
4234         if (status)
4235                 return status;
4236
4237         /* sessionid */
4238         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4239         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4240
4241         /* seqid, flags */
4242         READ_BUF(8);
4243         READ32(clp->cl_seqid);
4244         READ32(session->flags);
4245
4246         /* Channel attributes */
4247         status = decode_chan_attrs(xdr, &session->fc_attrs);
4248         if (!status)
4249                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4250         return status;
4251 }
4252
4253 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4254 {
4255         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4256 }
4257 #endif /* CONFIG_NFS_V4_1 */
4258
4259 static int decode_sequence(struct xdr_stream *xdr,
4260                            struct nfs4_sequence_res *res,
4261                            struct rpc_rqst *rqstp)
4262 {
4263 #if defined(CONFIG_NFS_V4_1)
4264         struct nfs4_slot *slot;
4265         struct nfs4_sessionid id;
4266         u32 dummy;
4267         int status;
4268         __be32 *p;
4269
4270         if (!res->sr_session)
4271                 return 0;
4272
4273         status = decode_op_hdr(xdr, OP_SEQUENCE);
4274         if (status)
4275                 goto out_err;
4276
4277         /*
4278          * If the server returns different values for sessionID, slotID or
4279          * sequence number, the server is looney tunes.
4280          */
4281         status = -ESERVERFAULT;
4282
4283         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4284         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4285         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4286         if (memcmp(id.data, res->sr_session->sess_id.data,
4287                    NFS4_MAX_SESSIONID_LEN)) {
4288                 dprintk("%s Invalid session id\n", __func__);
4289                 goto out_err;
4290         }
4291         /* seqid */
4292         READ32(dummy);
4293         if (dummy != slot->seq_nr) {
4294                 dprintk("%s Invalid sequence number\n", __func__);
4295                 goto out_err;
4296         }
4297         /* slot id */
4298         READ32(dummy);
4299         if (dummy != res->sr_slotid) {
4300                 dprintk("%s Invalid slot id\n", __func__);
4301                 goto out_err;
4302         }
4303         /* highest slot id - currently not processed */
4304         READ32(dummy);
4305         /* target highest slot id - currently not processed */
4306         READ32(dummy);
4307         /* result flags - currently not processed */
4308         READ32(dummy);
4309         status = 0;
4310 out_err:
4311         res->sr_status = status;
4312         return status;
4313 #else  /* CONFIG_NFS_V4_1 */
4314         return 0;
4315 #endif /* CONFIG_NFS_V4_1 */
4316 }
4317
4318 /*
4319  * END OF "GENERIC" DECODE ROUTINES.
4320  */
4321
4322 /*
4323  * Decode OPEN_DOWNGRADE response
4324  */
4325 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4326 {
4327         struct xdr_stream xdr;
4328         struct compound_hdr hdr;
4329         int status;
4330
4331         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4332         status = decode_compound_hdr(&xdr, &hdr);
4333         if (status)
4334                 goto out;
4335         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4336         if (status)
4337                 goto out;
4338         status = decode_putfh(&xdr);
4339         if (status)
4340                 goto out;
4341         status = decode_open_downgrade(&xdr, res);
4342         if (status != 0)
4343                 goto out;
4344         decode_getfattr(&xdr, res->fattr, res->server);
4345 out:
4346         return status;
4347 }
4348
4349 /*
4350  * Decode ACCESS response
4351  */
4352 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4353 {
4354         struct xdr_stream xdr;
4355         struct compound_hdr hdr;
4356         int status;
4357
4358         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4359         status = decode_compound_hdr(&xdr, &hdr);
4360         if (status)
4361                 goto out;
4362         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4363         if (status)
4364                 goto out;
4365         status = decode_putfh(&xdr);
4366         if (status != 0)
4367                 goto out;
4368         status = decode_access(&xdr, res);
4369         if (status != 0)
4370                 goto out;
4371         decode_getfattr(&xdr, res->fattr, res->server);
4372 out:
4373         return status;
4374 }
4375
4376 /*
4377  * Decode LOOKUP response
4378  */
4379 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4380 {
4381         struct xdr_stream xdr;
4382         struct compound_hdr hdr;
4383         int status;
4384
4385         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4386         status = decode_compound_hdr(&xdr, &hdr);
4387         if (status)
4388                 goto out;
4389         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4390         if (status)
4391                 goto out;
4392         if ((status = decode_putfh(&xdr)) != 0)
4393                 goto out;
4394         if ((status = decode_lookup(&xdr)) != 0)
4395                 goto out;
4396         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4397                 goto out;
4398         status = decode_getfattr(&xdr, res->fattr, res->server);
4399 out:
4400         return status;
4401 }
4402
4403 /*
4404  * Decode LOOKUP_ROOT response
4405  */
4406 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4407 {
4408         struct xdr_stream xdr;
4409         struct compound_hdr hdr;
4410         int status;
4411
4412         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4413         status = decode_compound_hdr(&xdr, &hdr);
4414         if (status)
4415                 goto out;
4416         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4417         if (status)
4418                 goto out;
4419         if ((status = decode_putrootfh(&xdr)) != 0)
4420                 goto out;
4421         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4422                 status = decode_getfattr(&xdr, res->fattr, res->server);
4423 out:
4424         return status;
4425 }
4426
4427 /*
4428  * Decode REMOVE response
4429  */
4430 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4431 {
4432         struct xdr_stream xdr;
4433         struct compound_hdr hdr;
4434         int status;
4435
4436         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4437         status = decode_compound_hdr(&xdr, &hdr);
4438         if (status)
4439                 goto out;
4440         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4441         if (status)
4442                 goto out;
4443         if ((status = decode_putfh(&xdr)) != 0)
4444                 goto out;
4445         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4446                 goto out;
4447         decode_getfattr(&xdr, &res->dir_attr, res->server);
4448 out:
4449         return status;
4450 }
4451
4452 /*
4453  * Decode RENAME response
4454  */
4455 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4456 {
4457         struct xdr_stream xdr;
4458         struct compound_hdr hdr;
4459         int status;
4460
4461         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4462         status = decode_compound_hdr(&xdr, &hdr);
4463         if (status)
4464                 goto out;
4465         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4466         if (status)
4467                 goto out;
4468         if ((status = decode_putfh(&xdr)) != 0)
4469                 goto out;
4470         if ((status = decode_savefh(&xdr)) != 0)
4471                 goto out;
4472         if ((status = decode_putfh(&xdr)) != 0)
4473                 goto out;
4474         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4475                 goto out;
4476         /* Current FH is target directory */
4477         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4478                 goto out;
4479         if ((status = decode_restorefh(&xdr)) != 0)
4480                 goto out;
4481         decode_getfattr(&xdr, res->old_fattr, res->server);
4482 out:
4483         return status;
4484 }
4485
4486 /*
4487  * Decode LINK response
4488  */
4489 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4490 {
4491         struct xdr_stream xdr;
4492         struct compound_hdr hdr;
4493         int status;
4494
4495         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4496         status = decode_compound_hdr(&xdr, &hdr);
4497         if (status)
4498                 goto out;
4499         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4500         if (status)
4501                 goto out;
4502         if ((status = decode_putfh(&xdr)) != 0)
4503                 goto out;
4504         if ((status = decode_savefh(&xdr)) != 0)
4505                 goto out;
4506         if ((status = decode_putfh(&xdr)) != 0)
4507                 goto out;
4508         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4509                 goto out;
4510         /*
4511          * Note order: OP_LINK leaves the directory as the current
4512          *             filehandle.
4513          */
4514         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4515                 goto out;
4516         if ((status = decode_restorefh(&xdr)) != 0)
4517                 goto out;
4518         decode_getfattr(&xdr, res->fattr, res->server);
4519 out:
4520         return status;
4521 }
4522
4523 /*
4524  * Decode CREATE response
4525  */
4526 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4527 {
4528         struct xdr_stream xdr;
4529         struct compound_hdr hdr;
4530         int status;
4531
4532         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4533         status = decode_compound_hdr(&xdr, &hdr);
4534         if (status)
4535                 goto out;
4536         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4537         if (status)
4538                 goto out;
4539         if ((status = decode_putfh(&xdr)) != 0)
4540                 goto out;
4541         if ((status = decode_savefh(&xdr)) != 0)
4542                 goto out;
4543         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4544                 goto out;
4545         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4546                 goto out;
4547         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4548                 goto out;
4549         if ((status = decode_restorefh(&xdr)) != 0)
4550                 goto out;
4551         decode_getfattr(&xdr, res->dir_fattr, res->server);
4552 out:
4553         return status;
4554 }
4555
4556 /*
4557  * Decode SYMLINK response
4558  */
4559 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4560 {
4561         return nfs4_xdr_dec_create(rqstp, p, res);
4562 }
4563
4564 /*
4565  * Decode GETATTR response
4566  */
4567 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4568 {
4569         struct xdr_stream xdr;
4570         struct compound_hdr hdr;
4571         int status;
4572
4573         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4574         status = decode_compound_hdr(&xdr, &hdr);
4575         if (status)
4576                 goto out;
4577         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4578         if (status)
4579                 goto out;
4580         status = decode_putfh(&xdr);
4581         if (status)
4582                 goto out;
4583         status = decode_getfattr(&xdr, res->fattr, res->server);
4584 out:
4585         return status;
4586 }
4587
4588 /*
4589  * Encode an SETACL request
4590  */
4591 static int
4592 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4593 {
4594         struct xdr_stream xdr;
4595         struct compound_hdr hdr = {
4596                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4597         };
4598         int status;
4599
4600         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4601         encode_compound_hdr(&xdr, req, &hdr);
4602         encode_sequence(&xdr, &args->seq_args, &hdr);
4603         encode_putfh(&xdr, args->fh, &hdr);
4604         status = encode_setacl(&xdr, args, &hdr);
4605         encode_nops(&hdr);
4606         return status;
4607 }
4608
4609 /*
4610  * Decode SETACL response
4611  */
4612 static int
4613 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4614                     struct nfs_setaclres *res)
4615 {
4616         struct xdr_stream xdr;
4617         struct compound_hdr hdr;
4618         int status;
4619
4620         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4621         status = decode_compound_hdr(&xdr, &hdr);
4622         if (status)
4623                 goto out;
4624         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4625         if (status)
4626                 goto out;
4627         status = decode_putfh(&xdr);
4628         if (status)
4629                 goto out;
4630         status = decode_setattr(&xdr);
4631 out:
4632         return status;
4633 }
4634
4635 /*
4636  * Decode GETACL response
4637  */
4638 static int
4639 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4640                     struct nfs_getaclres *res)
4641 {
4642         struct xdr_stream xdr;
4643         struct compound_hdr hdr;
4644         int status;
4645
4646         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4647         status = decode_compound_hdr(&xdr, &hdr);
4648         if (status)
4649                 goto out;
4650         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4651         if (status)
4652                 goto out;
4653         status = decode_putfh(&xdr);
4654         if (status)
4655                 goto out;
4656         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4657
4658 out:
4659         return status;
4660 }
4661
4662 /*
4663  * Decode CLOSE response
4664  */
4665 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4666 {
4667         struct xdr_stream xdr;
4668         struct compound_hdr hdr;
4669         int status;
4670
4671         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4672         status = decode_compound_hdr(&xdr, &hdr);
4673         if (status)
4674                 goto out;
4675         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4676         if (status)
4677                 goto out;
4678         status = decode_putfh(&xdr);
4679         if (status)
4680                 goto out;
4681         status = decode_close(&xdr, res);
4682         if (status != 0)
4683                 goto out;
4684         /*
4685          * Note: Server may do delete on close for this file
4686          *      in which case the getattr call will fail with
4687          *      an ESTALE error. Shouldn't be a problem,
4688          *      though, since fattr->valid will remain unset.
4689          */
4690         decode_getfattr(&xdr, res->fattr, res->server);
4691 out:
4692         return status;
4693 }
4694
4695 /*
4696  * Decode OPEN response
4697  */
4698 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4699 {
4700         struct xdr_stream xdr;
4701         struct compound_hdr hdr;
4702         int status;
4703
4704         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4705         status = decode_compound_hdr(&xdr, &hdr);
4706         if (status)
4707                 goto out;
4708         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4709         if (status)
4710                 goto out;
4711         status = decode_putfh(&xdr);
4712         if (status)
4713                 goto out;
4714         status = decode_savefh(&xdr);
4715         if (status)
4716                 goto out;
4717         status = decode_open(&xdr, res);
4718         if (status)
4719                 goto out;
4720         if (decode_getfh(&xdr, &res->fh) != 0)
4721                 goto out;
4722         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4723                 goto out;
4724         if (decode_restorefh(&xdr) != 0)
4725                 goto out;
4726         decode_getfattr(&xdr, res->dir_attr, res->server);
4727 out:
4728         return status;
4729 }
4730
4731 /*
4732  * Decode OPEN_CONFIRM response
4733  */
4734 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4735 {
4736         struct xdr_stream xdr;
4737         struct compound_hdr hdr;
4738         int status;
4739
4740         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4741         status = decode_compound_hdr(&xdr, &hdr);
4742         if (status)
4743                 goto out;
4744         status = decode_putfh(&xdr);
4745         if (status)
4746                 goto out;
4747         status = decode_open_confirm(&xdr, res);
4748 out:
4749         return status;
4750 }
4751
4752 /*
4753  * Decode OPEN response
4754  */
4755 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4756 {
4757         struct xdr_stream xdr;
4758         struct compound_hdr hdr;
4759         int status;
4760
4761         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4762         status = decode_compound_hdr(&xdr, &hdr);
4763         if (status)
4764                 goto out;
4765         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4766         if (status)
4767                 goto out;
4768         status = decode_putfh(&xdr);
4769         if (status)
4770                 goto out;
4771         status = decode_open(&xdr, res);
4772         if (status)
4773                 goto out;
4774         decode_getfattr(&xdr, res->f_attr, res->server);
4775 out:
4776         return status;
4777 }
4778
4779 /*
4780  * Decode SETATTR response
4781  */
4782 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4783 {
4784         struct xdr_stream xdr;
4785         struct compound_hdr hdr;
4786         int status;
4787
4788         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4789         status = decode_compound_hdr(&xdr, &hdr);
4790         if (status)
4791                 goto out;
4792         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4793         if (status)
4794                 goto out;
4795         status = decode_putfh(&xdr);
4796         if (status)
4797                 goto out;
4798         status = decode_setattr(&xdr);
4799         if (status)
4800                 goto out;
4801         decode_getfattr(&xdr, res->fattr, res->server);
4802 out:
4803         return status;
4804 }
4805
4806 /*
4807  * Decode LOCK response
4808  */
4809 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4810 {
4811         struct xdr_stream xdr;
4812         struct compound_hdr hdr;
4813         int status;
4814
4815         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4816         status = decode_compound_hdr(&xdr, &hdr);
4817         if (status)
4818                 goto out;
4819         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4820         if (status)
4821                 goto out;
4822         status = decode_putfh(&xdr);
4823         if (status)
4824                 goto out;
4825         status = decode_lock(&xdr, res);
4826 out:
4827         return status;
4828 }
4829
4830 /*
4831  * Decode LOCKT response
4832  */
4833 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4834 {
4835         struct xdr_stream xdr;
4836         struct compound_hdr hdr;
4837         int status;
4838
4839         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4840         status = decode_compound_hdr(&xdr, &hdr);
4841         if (status)
4842                 goto out;
4843         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4844         if (status)
4845                 goto out;
4846         status = decode_putfh(&xdr);
4847         if (status)
4848                 goto out;
4849         status = decode_lockt(&xdr, res);
4850 out:
4851         return status;
4852 }
4853
4854 /*
4855  * Decode LOCKU response
4856  */
4857 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4858 {
4859         struct xdr_stream xdr;
4860         struct compound_hdr hdr;
4861         int status;
4862
4863         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4864         status = decode_compound_hdr(&xdr, &hdr);
4865         if (status)
4866                 goto out;
4867         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4868         if (status)
4869                 goto out;
4870         status = decode_putfh(&xdr);
4871         if (status)
4872                 goto out;
4873         status = decode_locku(&xdr, res);
4874 out:
4875         return status;
4876 }
4877
4878 /*
4879  * Decode READLINK response
4880  */
4881 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4882                                  struct nfs4_readlink_res *res)
4883 {
4884         struct xdr_stream xdr;
4885         struct compound_hdr hdr;
4886         int status;
4887
4888         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4889         status = decode_compound_hdr(&xdr, &hdr);
4890         if (status)
4891                 goto out;
4892         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4893         if (status)
4894                 goto out;
4895         status = decode_putfh(&xdr);
4896         if (status)
4897                 goto out;
4898         status = decode_readlink(&xdr, rqstp);
4899 out:
4900         return status;
4901 }
4902
4903 /*
4904  * Decode READDIR response
4905  */
4906 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4907 {
4908         struct xdr_stream xdr;
4909         struct compound_hdr hdr;
4910         int status;
4911
4912         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4913         status = decode_compound_hdr(&xdr, &hdr);
4914         if (status)
4915                 goto out;
4916         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4917         if (status)
4918                 goto out;
4919         status = decode_putfh(&xdr);
4920         if (status)
4921                 goto out;
4922         status = decode_readdir(&xdr, rqstp, res);
4923 out:
4924         return status;
4925 }
4926
4927 /*
4928  * Decode Read response
4929  */
4930 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4931 {
4932         struct xdr_stream xdr;
4933         struct compound_hdr hdr;
4934         int status;
4935
4936         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4937         status = decode_compound_hdr(&xdr, &hdr);
4938         if (status)
4939                 goto out;
4940         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4941         if (status)
4942                 goto out;
4943         status = decode_putfh(&xdr);
4944         if (status)
4945                 goto out;
4946         status = decode_read(&xdr, rqstp, res);
4947         if (!status)
4948                 status = res->count;
4949 out:
4950         return status;
4951 }
4952
4953 /*
4954  * Decode WRITE response
4955  */
4956 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4957 {
4958         struct xdr_stream xdr;
4959         struct compound_hdr hdr;
4960         int status;
4961
4962         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4963         status = decode_compound_hdr(&xdr, &hdr);
4964         if (status)
4965                 goto out;
4966         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4967         if (status)
4968                 goto out;
4969         status = decode_putfh(&xdr);
4970         if (status)
4971                 goto out;
4972         status = decode_write(&xdr, res);
4973         if (status)
4974                 goto out;
4975         decode_getfattr(&xdr, res->fattr, res->server);
4976         if (!status)
4977                 status = res->count;
4978 out:
4979         return status;
4980 }
4981
4982 /*
4983  * Decode COMMIT response
4984  */
4985 static int nfs4_xdr_dec_commit(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_commit(&xdr, res);
5002         if (status)
5003                 goto out;
5004         decode_getfattr(&xdr, res->fattr, res->server);
5005 out:
5006         return status;
5007 }
5008
5009 /*
5010  * FSINFO request
5011  */
5012 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5013                                struct nfs4_fsinfo_res *res)
5014 {
5015         struct xdr_stream xdr;
5016         struct compound_hdr hdr;
5017         int status;
5018
5019         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5020         status = decode_compound_hdr(&xdr, &hdr);
5021         if (!status)
5022                 status = decode_sequence(&xdr, &res->seq_res, req);
5023         if (!status)
5024                 status = decode_putfh(&xdr);
5025         if (!status)
5026                 status = decode_fsinfo(&xdr, res->fsinfo);
5027         return status;
5028 }
5029
5030 /*
5031  * PATHCONF request
5032  */
5033 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5034                                  struct nfs4_pathconf_res *res)
5035 {
5036         struct xdr_stream xdr;
5037         struct compound_hdr hdr;
5038         int status;
5039
5040         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5041         status = decode_compound_hdr(&xdr, &hdr);
5042         if (!status)
5043                 status = decode_sequence(&xdr, &res->seq_res, req);
5044         if (!status)
5045                 status = decode_putfh(&xdr);
5046         if (!status)
5047                 status = decode_pathconf(&xdr, res->pathconf);
5048         return status;
5049 }
5050
5051 /*
5052  * STATFS request
5053  */
5054 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5055                                struct nfs4_statfs_res *res)
5056 {
5057         struct xdr_stream xdr;
5058         struct compound_hdr hdr;
5059         int status;
5060
5061         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5062         status = decode_compound_hdr(&xdr, &hdr);
5063         if (!status)
5064                 status = decode_sequence(&xdr, &res->seq_res, req);
5065         if (!status)
5066                 status = decode_putfh(&xdr);
5067         if (!status)
5068                 status = decode_statfs(&xdr, res->fsstat);
5069         return status;
5070 }
5071
5072 /*
5073  * GETATTR_BITMAP request
5074  */
5075 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5076 {
5077         struct xdr_stream xdr;
5078         struct compound_hdr hdr;
5079         int status;
5080
5081         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5082         status = decode_compound_hdr(&xdr, &hdr);
5083         if (status)
5084                 goto out;
5085         status = decode_sequence(&xdr, &res->seq_res, req);
5086         if (status)
5087                 goto out;
5088         if ((status = decode_putfh(&xdr)) != 0)
5089                 goto out;
5090         status = decode_server_caps(&xdr, res);
5091 out:
5092         return status;
5093 }
5094
5095 /*
5096  * Decode RENEW response
5097  */
5098 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5099 {
5100         struct xdr_stream xdr;
5101         struct compound_hdr hdr;
5102         int status;
5103
5104         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5105         status = decode_compound_hdr(&xdr, &hdr);
5106         if (!status)
5107                 status = decode_renew(&xdr);
5108         return status;
5109 }
5110
5111 /*
5112  * a SETCLIENTID request
5113  */
5114 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5115                 struct nfs_client *clp)
5116 {
5117         struct xdr_stream xdr;
5118         struct compound_hdr hdr;
5119         int status;
5120
5121         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5122         status = decode_compound_hdr(&xdr, &hdr);
5123         if (!status)
5124                 status = decode_setclientid(&xdr, clp);
5125         return status;
5126 }
5127
5128 /*
5129  * a SETCLIENTID_CONFIRM request
5130  */
5131 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5132 {
5133         struct xdr_stream xdr;
5134         struct compound_hdr hdr;
5135         int status;
5136
5137         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5138         status = decode_compound_hdr(&xdr, &hdr);
5139         if (!status)
5140                 status = decode_setclientid_confirm(&xdr);
5141         if (!status)
5142                 status = decode_putrootfh(&xdr);
5143         if (!status)
5144                 status = decode_fsinfo(&xdr, fsinfo);
5145         return status;
5146 }
5147
5148 /*
5149  * DELEGRETURN request
5150  */
5151 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5152 {
5153         struct xdr_stream xdr;
5154         struct compound_hdr hdr;
5155         int status;
5156
5157         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5158         status = decode_compound_hdr(&xdr, &hdr);
5159         if (status)
5160                 goto out;
5161         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5162         if (status)
5163                 goto out;
5164         status = decode_putfh(&xdr);
5165         if (status != 0)
5166                 goto out;
5167         status = decode_delegreturn(&xdr);
5168         decode_getfattr(&xdr, res->fattr, res->server);
5169 out:
5170         return status;
5171 }
5172
5173 /*
5174  * FS_LOCATIONS request
5175  */
5176 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5177                                      struct nfs4_fs_locations_res *res)
5178 {
5179         struct xdr_stream xdr;
5180         struct compound_hdr hdr;
5181         int status;
5182
5183         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5184         status = decode_compound_hdr(&xdr, &hdr);
5185         if (status)
5186                 goto out;
5187         status = decode_sequence(&xdr, &res->seq_res, req);
5188         if (status)
5189                 goto out;
5190         if ((status = decode_putfh(&xdr)) != 0)
5191                 goto out;
5192         if ((status = decode_lookup(&xdr)) != 0)
5193                 goto out;
5194         xdr_enter_page(&xdr, PAGE_SIZE);
5195         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5196                                  res->fs_locations->server);
5197 out:
5198         return status;
5199 }
5200
5201 #if defined(CONFIG_NFS_V4_1)
5202 /*
5203  * EXCHANGE_ID request
5204  */
5205 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5206                                     void *res)
5207 {
5208         struct xdr_stream xdr;
5209         struct compound_hdr hdr;
5210         int status;
5211
5212         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5213         status = decode_compound_hdr(&xdr, &hdr);
5214         if (!status)
5215                 status = decode_exchange_id(&xdr, res);
5216         return status;
5217 }
5218
5219 /*
5220  * a CREATE_SESSION request
5221  */
5222 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5223                                        struct nfs41_create_session_res *res)
5224 {
5225         struct xdr_stream xdr;
5226         struct compound_hdr hdr;
5227         int status;
5228
5229         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5230         status = decode_compound_hdr(&xdr, &hdr);
5231         if (!status)
5232                 status = decode_create_session(&xdr, res);
5233         return status;
5234 }
5235
5236 /*
5237  * a DESTROY_SESSION request
5238  */
5239 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5240                                         void *dummy)
5241 {
5242         struct xdr_stream xdr;
5243         struct compound_hdr hdr;
5244         int status;
5245
5246         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5247         status = decode_compound_hdr(&xdr, &hdr);
5248         if (!status)
5249                 status = decode_destroy_session(&xdr, dummy);
5250         return status;
5251 }
5252
5253 /*
5254  * a SEQUENCE request
5255  */
5256 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5257                                  struct nfs4_sequence_res *res)
5258 {
5259         struct xdr_stream xdr;
5260         struct compound_hdr hdr;
5261         int status;
5262
5263         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5264         status = decode_compound_hdr(&xdr, &hdr);
5265         if (!status)
5266                 status = decode_sequence(&xdr, res, rqstp);
5267         return status;
5268 }
5269
5270 /*
5271  * a GET_LEASE_TIME request
5272  */
5273 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5274                                        struct nfs4_get_lease_time_res *res)
5275 {
5276         struct xdr_stream xdr;
5277         struct compound_hdr hdr;
5278         int status;
5279
5280         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5281         status = decode_compound_hdr(&xdr, &hdr);
5282         if (!status)
5283                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5284         if (!status)
5285                 status = decode_putrootfh(&xdr);
5286         if (!status)
5287                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5288         return status;
5289 }
5290 #endif /* CONFIG_NFS_V4_1 */
5291
5292 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5293 {
5294         uint32_t bitmap[2] = {0};
5295         uint32_t len;
5296
5297         if (!*p++) {
5298                 if (!*p)
5299                         return ERR_PTR(-EAGAIN);
5300                 entry->eof = 1;
5301                 return ERR_PTR(-EBADCOOKIE);
5302         }
5303
5304         entry->prev_cookie = entry->cookie;
5305         p = xdr_decode_hyper(p, &entry->cookie);
5306         entry->len = ntohl(*p++);
5307         entry->name = (const char *) p;
5308         p += XDR_QUADLEN(entry->len);
5309
5310         /*
5311          * In case the server doesn't return an inode number,
5312          * we fake one here.  (We don't use inode number 0,
5313          * since glibc seems to choke on it...)
5314          */
5315         entry->ino = 1;
5316
5317         len = ntohl(*p++);              /* bitmap length */
5318         if (len-- > 0) {
5319                 bitmap[0] = ntohl(*p++);
5320                 if (len-- > 0) {
5321                         bitmap[1] = ntohl(*p++);
5322                         p += len;
5323                 }
5324         }
5325         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5326         if (len > 0) {
5327                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5328                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5329                         /* Ignore the return value of rdattr_error for now */
5330                         p++;
5331                         len--;
5332                 }
5333                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5334                         xdr_decode_hyper(p, &entry->ino);
5335                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5336                         xdr_decode_hyper(p, &entry->ino);
5337                 p += len;
5338         }
5339
5340         entry->eof = !p[0] && p[1];
5341         return p;
5342 }
5343
5344 /*
5345  * We need to translate between nfs status return values and
5346  * the local errno values which may not be the same.
5347  */
5348 static struct {
5349         int stat;
5350         int errno;
5351 } nfs_errtbl[] = {
5352         { NFS4_OK,              0               },
5353         { NFS4ERR_PERM,         -EPERM          },
5354         { NFS4ERR_NOENT,        -ENOENT         },
5355         { NFS4ERR_IO,           -errno_NFSERR_IO},
5356         { NFS4ERR_NXIO,         -ENXIO          },
5357         { NFS4ERR_ACCESS,       -EACCES         },
5358         { NFS4ERR_EXIST,        -EEXIST         },
5359         { NFS4ERR_XDEV,         -EXDEV          },
5360         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5361         { NFS4ERR_ISDIR,        -EISDIR         },
5362         { NFS4ERR_INVAL,        -EINVAL         },
5363         { NFS4ERR_FBIG,         -EFBIG          },
5364         { NFS4ERR_NOSPC,        -ENOSPC         },
5365         { NFS4ERR_ROFS,         -EROFS          },
5366         { NFS4ERR_MLINK,        -EMLINK         },
5367         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5368         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5369         { NFS4ERR_DQUOT,        -EDQUOT         },
5370         { NFS4ERR_STALE,        -ESTALE         },
5371         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5372         { NFS4ERR_BADOWNER,     -EINVAL         },
5373         { NFS4ERR_BADNAME,      -EINVAL         },
5374         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5375         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5376         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5377         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5378         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5379         { NFS4ERR_LOCKED,       -EAGAIN         },
5380         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5381         { NFS4ERR_SYMLINK,      -ELOOP          },
5382         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5383         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5384         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5385                                                     * to be handled by a
5386                                                     * middle-layer.
5387                                                     */
5388         { -1,                   -EIO            }
5389 };
5390
5391 /*
5392  * Convert an NFS error code to a local one.
5393  * This one is used jointly by NFSv2 and NFSv3.
5394  */
5395 static int
5396 nfs4_stat_to_errno(int stat)
5397 {
5398         int i;
5399         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5400                 if (nfs_errtbl[i].stat == stat)
5401                         return nfs_errtbl[i].errno;
5402         }
5403         if (stat <= 10000 || stat > 10100) {
5404                 /* The server is looney tunes. */
5405                 return -ESERVERFAULT;
5406         }
5407         /* If we cannot translate the error, the recovery routines should
5408          * handle it.
5409          * Note: remaining NFSv4 error codes have values > 10000, so should
5410          * not conflict with native Linux error codes.
5411          */
5412         return -stat;
5413 }
5414
5415 #define PROC(proc, argtype, restype)                            \
5416 [NFSPROC4_CLNT_##proc] = {                                      \
5417         .p_proc   = NFSPROC4_COMPOUND,                          \
5418         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5419         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5420         .p_arglen = NFS4_##argtype##_sz,                        \
5421         .p_replen = NFS4_##restype##_sz,                        \
5422         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5423         .p_name   = #proc,                                      \
5424 }
5425
5426 struct rpc_procinfo     nfs4_procedures[] = {
5427   PROC(READ,            enc_read,       dec_read),
5428   PROC(WRITE,           enc_write,      dec_write),
5429   PROC(COMMIT,          enc_commit,     dec_commit),
5430   PROC(OPEN,            enc_open,       dec_open),
5431   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5432   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5433   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5434   PROC(CLOSE,           enc_close,      dec_close),
5435   PROC(SETATTR,         enc_setattr,    dec_setattr),
5436   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5437   PROC(RENEW,           enc_renew,      dec_renew),
5438   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5439   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5440   PROC(LOCK,            enc_lock,       dec_lock),
5441   PROC(LOCKT,           enc_lockt,      dec_lockt),
5442   PROC(LOCKU,           enc_locku,      dec_locku),
5443   PROC(ACCESS,          enc_access,     dec_access),
5444   PROC(GETATTR,         enc_getattr,    dec_getattr),
5445   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5446   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5447   PROC(REMOVE,          enc_remove,     dec_remove),
5448   PROC(RENAME,          enc_rename,     dec_rename),
5449   PROC(LINK,            enc_link,       dec_link),
5450   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5451   PROC(CREATE,          enc_create,     dec_create),
5452   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5453   PROC(STATFS,          enc_statfs,     dec_statfs),
5454   PROC(READLINK,        enc_readlink,   dec_readlink),
5455   PROC(READDIR,         enc_readdir,    dec_readdir),
5456   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5457   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5458   PROC(GETACL,          enc_getacl,     dec_getacl),
5459   PROC(SETACL,          enc_setacl,     dec_setacl),
5460   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5461 #if defined(CONFIG_NFS_V4_1)
5462   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5463   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5464   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5465   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5466   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5467 #endif /* CONFIG_NFS_V4_1 */
5468 };
5469
5470 struct rpc_version              nfs_version4 = {
5471         .number                 = 4,
5472         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5473         .procs                  = nfs4_procedures
5474 };
5475
5476 /*
5477  * Local variables:
5478  *  c-basic-offset: 8
5479  * End:
5480  */