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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 /*
 706  * START OF "GENERIC" ENCODE ROUTINES.
 707  *   These may look a little ugly since they are imported from a "generic"
 708  * set of XDR encode/decode routines which are intended to be shared by
 709  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 710  *
 711  * If the pain of reading these is too great, it should be a straightforward
 712  * task to translate them into Linux-specific versions which are more
 713  * consistent with the style used in NFSv2/v3...
 714  */
 715 #define WRITEMEM(ptr,nbytes)     do {                           \
 716         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 717 } while (0)
 718
 719 #define RESERVE_SPACE(nbytes)   do {                            \
 720         p = xdr_reserve_space(xdr, nbytes);                     \
 721         BUG_ON(!p);                                             \
 722 } while (0)
 723
 724 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 725 {
 726         __be32 *p;
 727
 728         p = xdr_reserve_space(xdr, 4 + len);
 729         BUG_ON(p == NULL);
 730         xdr_encode_opaque(p, str, len);
 731 }
 732
 733 static void encode_compound_hdr(struct xdr_stream *xdr,
 734                                 struct rpc_rqst *req,
 735                                 struct compound_hdr *hdr)
 736 {
 737         __be32 *p;
 738         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 739
 740         /* initialize running count of expected bytes in reply.
 741          * NOTE: the replied tag SHOULD be the same is the one sent,
 742          * but this is not required as a MUST for the server to do so. */
 743         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 744
 745         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 746         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 747         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 748         *p++ = cpu_to_be32(hdr->taglen);
 749         WRITEMEM(hdr->tag, hdr->taglen);
 750         *p++ = cpu_to_be32(hdr->minorversion);
 751         hdr->nops_p = p;
 752         *p++ = cpu_to_be32(hdr->nops);
 753 }
 754
 755 static void encode_nops(struct compound_hdr *hdr)
 756 {
 757         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 758         *hdr->nops_p = htonl(hdr->nops);
 759 }
 760
 761 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 762 {
 763         __be32 *p;
 764
 765         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 766         BUG_ON(p == NULL);
 767         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 768 }
 769
 770 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 771 {
 772         char owner_name[IDMAP_NAMESZ];
 773         char owner_group[IDMAP_NAMESZ];
 774         int owner_namelen = 0;
 775         int owner_grouplen = 0;
 776         __be32 *p;
 777         __be32 *q;
 778         int len;
 779         uint32_t bmval0 = 0;
 780         uint32_t bmval1 = 0;
 781
 782         /*
 783          * We reserve enough space to write the entire attribute buffer at once.
 784          * In the worst-case, this would be
 785          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 786          *          = 36 bytes, plus any contribution from variable-length fields
 787          *            such as owner/group.
 788          */
 789         len = 16;
 790
 791         /* Sigh */
 792         if (iap->ia_valid & ATTR_SIZE)
 793                 len += 8;
 794         if (iap->ia_valid & ATTR_MODE)
 795                 len += 4;
 796         if (iap->ia_valid & ATTR_UID) {
 797                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 798                 if (owner_namelen < 0) {
 799                         dprintk("nfs: couldn't resolve uid %d to string\n",
 800                                         iap->ia_uid);
 801                         /* XXX */
 802                         strcpy(owner_name, "nobody");
 803                         owner_namelen = sizeof("nobody") - 1;
 804                         /* goto out; */
 805                 }
 806                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 807         }
 808         if (iap->ia_valid & ATTR_GID) {
 809                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 810                 if (owner_grouplen < 0) {
 811                         dprintk("nfs: couldn't resolve gid %d to string\n",
 812                                         iap->ia_gid);
 813                         strcpy(owner_group, "nobody");
 814                         owner_grouplen = sizeof("nobody") - 1;
 815                         /* goto out; */
 816                 }
 817                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 818         }
 819         if (iap->ia_valid & ATTR_ATIME_SET)
 820                 len += 16;
 821         else if (iap->ia_valid & ATTR_ATIME)
 822                 len += 4;
 823         if (iap->ia_valid & ATTR_MTIME_SET)
 824                 len += 16;
 825         else if (iap->ia_valid & ATTR_MTIME)
 826                 len += 4;
 827         RESERVE_SPACE(len);
 828
 829         /*
 830          * We write the bitmap length now, but leave the bitmap and the attribute
 831          * buffer length to be backfilled at the end of this routine.
 832          */
 833         *p++ = cpu_to_be32(2);
 834         q = p;
 835         p += 3;
 836
 837         if (iap->ia_valid & ATTR_SIZE) {
 838                 bmval0 |= FATTR4_WORD0_SIZE;
 839                 p = xdr_encode_hyper(p, iap->ia_size);
 840         }
 841         if (iap->ia_valid & ATTR_MODE) {
 842                 bmval1 |= FATTR4_WORD1_MODE;
 843                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 844         }
 845         if (iap->ia_valid & ATTR_UID) {
 846                 bmval1 |= FATTR4_WORD1_OWNER;
 847                 *p++ = cpu_to_be32(owner_namelen);
 848                 WRITEMEM(owner_name, owner_namelen);
 849         }
 850         if (iap->ia_valid & ATTR_GID) {
 851                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 852                 *p++ = cpu_to_be32(owner_grouplen);
 853                 WRITEMEM(owner_group, owner_grouplen);
 854         }
 855         if (iap->ia_valid & ATTR_ATIME_SET) {
 856                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 857                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 858                 *p++ = cpu_to_be32(0);
 859                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 860                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 861         }
 862         else if (iap->ia_valid & ATTR_ATIME) {
 863                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 864                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 865         }
 866         if (iap->ia_valid & ATTR_MTIME_SET) {
 867                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 868                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 869                 *p++ = cpu_to_be32(0);
 870                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 871                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 872         }
 873         else if (iap->ia_valid & ATTR_MTIME) {
 874                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 875                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 876         }
 877
 878         /*
 879          * Now we backfill the bitmap and the attribute buffer length.
 880          */
 881         if (len != ((char *)p - (char *)q) + 4) {
 882                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 883                                 len, ((char *)p - (char *)q) + 4);
 884                 BUG();
 885         }
 886         len = (char *)p - (char *)q - 12;
 887         *q++ = htonl(bmval0);
 888         *q++ = htonl(bmval1);
 889         *q++ = htonl(len);
 890
 891 /* out: */
 892 }
 893
 894 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 895 {
 896         __be32 *p;
 897
 898         RESERVE_SPACE(8);
 899         *p++ = cpu_to_be32(OP_ACCESS);
 900         *p++ = cpu_to_be32(access);
 901         hdr->nops++;
 902         hdr->replen += decode_access_maxsz;
 903 }
 904
 905 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 906 {
 907         __be32 *p;
 908
 909         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 910         *p++ = cpu_to_be32(OP_CLOSE);
 911         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 912         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 913         hdr->nops++;
 914         hdr->replen += decode_close_maxsz;
 915 }
 916
 917 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 918 {
 919         __be32 *p;
 920
 921         RESERVE_SPACE(16);
 922         *p++ = cpu_to_be32(OP_COMMIT);
 923         p = xdr_encode_hyper(p, args->offset);
 924         *p++ = cpu_to_be32(args->count);
 925         hdr->nops++;
 926         hdr->replen += decode_commit_maxsz;
 927 }
 928
 929 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 930 {
 931         __be32 *p;
 932
 933         RESERVE_SPACE(8);
 934         *p++ = cpu_to_be32(OP_CREATE);
 935         *p++ = cpu_to_be32(create->ftype);
 936
 937         switch (create->ftype) {
 938         case NF4LNK:
 939                 RESERVE_SPACE(4);
 940                 *p++ = cpu_to_be32(create->u.symlink.len);
 941                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 942                 break;
 943
 944         case NF4BLK: case NF4CHR:
 945                 RESERVE_SPACE(8);
 946                 *p++ = cpu_to_be32(create->u.device.specdata1);
 947                 *p++ = cpu_to_be32(create->u.device.specdata2);
 948                 break;
 949
 950         default:
 951                 break;
 952         }
 953
 954         RESERVE_SPACE(4 + create->name->len);
 955         *p++ = cpu_to_be32(create->name->len);
 956         WRITEMEM(create->name->name, create->name->len);
 957         hdr->nops++;
 958         hdr->replen += decode_create_maxsz;
 959
 960         encode_attrs(xdr, create->attrs, create->server);
 961 }
 962
 963 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 964 {
 965         __be32 *p;
 966
 967         RESERVE_SPACE(12);
 968         *p++ = cpu_to_be32(OP_GETATTR);
 969         *p++ = cpu_to_be32(1);
 970         *p++ = cpu_to_be32(bitmap);
 971         hdr->nops++;
 972         hdr->replen += decode_getattr_maxsz;
 973 }
 974
 975 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 976 {
 977         __be32 *p;
 978
 979         RESERVE_SPACE(16);
 980         *p++ = cpu_to_be32(OP_GETATTR);
 981         *p++ = cpu_to_be32(2);
 982         *p++ = cpu_to_be32(bm0);
 983         *p++ = cpu_to_be32(bm1);
 984         hdr->nops++;
 985         hdr->replen += decode_getattr_maxsz;
 986 }
 987
 988 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 989 {
 990         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 991                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 992 }
 993
 994 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 995 {
 996         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 997                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 998 }
 999
1000 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1001 {
1002         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1003                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1004 }
1005
1006 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1007 {
1008         __be32 *p;
1009
1010         RESERVE_SPACE(4);
1011         *p++ = cpu_to_be32(OP_GETFH);
1012         hdr->nops++;
1013         hdr->replen += decode_getfh_maxsz;
1014 }
1015
1016 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1017 {
1018         __be32 *p;
1019
1020         RESERVE_SPACE(8 + name->len);
1021         *p++ = cpu_to_be32(OP_LINK);
1022         *p++ = cpu_to_be32(name->len);
1023         WRITEMEM(name->name, name->len);
1024         hdr->nops++;
1025         hdr->replen += decode_link_maxsz;
1026 }
1027
1028 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1029 {
1030         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1031                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1032         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1033 }
1034
1035 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1036 {
1037         if (fl->fl_end == OFFSET_MAX)
1038                 return ~(uint64_t)0;
1039         return fl->fl_end - fl->fl_start + 1;
1040 }
1041
1042 /*
1043  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1044  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1045  */
1046 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1047 {
1048         __be32 *p;
1049
1050         RESERVE_SPACE(32);
1051         *p++ = cpu_to_be32(OP_LOCK);
1052         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1053         *p++ = cpu_to_be32(args->reclaim);
1054         p = xdr_encode_hyper(p, args->fl->fl_start);
1055         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1056         *p++ = cpu_to_be32(args->new_lock_owner);
1057         if (args->new_lock_owner){
1058                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1059                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1060                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
1061                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1062                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1063                 *p++ = cpu_to_be32(16);
1064                 WRITEMEM("lock id:", 8);
1065                 p = xdr_encode_hyper(p, args->lock_owner.id);
1066         }
1067         else {
1068                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1069                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
1070                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1071         }
1072         hdr->nops++;
1073         hdr->replen += decode_lock_maxsz;
1074 }
1075
1076 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1077 {
1078         __be32 *p;
1079
1080         RESERVE_SPACE(52);
1081         *p++ = cpu_to_be32(OP_LOCKT);
1082         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1083         p = xdr_encode_hyper(p, args->fl->fl_start);
1084         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1085         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1086         *p++ = cpu_to_be32(16);
1087         WRITEMEM("lock id:", 8);
1088         p = xdr_encode_hyper(p, args->lock_owner.id);
1089         hdr->nops++;
1090         hdr->replen += decode_lockt_maxsz;
1091 }
1092
1093 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1094 {
1095         __be32 *p;
1096
1097         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1098         *p++ = cpu_to_be32(OP_LOCKU);
1099         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1100         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1101         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
1102         p = xdr_encode_hyper(p, args->fl->fl_start);
1103         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1104         hdr->nops++;
1105         hdr->replen += decode_locku_maxsz;
1106 }
1107
1108 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1109 {
1110         int len = name->len;
1111         __be32 *p;
1112
1113         RESERVE_SPACE(8 + len);
1114         *p++ = cpu_to_be32(OP_LOOKUP);
1115         *p++ = cpu_to_be32(len);
1116         WRITEMEM(name->name, len);
1117         hdr->nops++;
1118         hdr->replen += decode_lookup_maxsz;
1119 }
1120
1121 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1122 {
1123         __be32 *p;
1124
1125         RESERVE_SPACE(8);
1126         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1127         case FMODE_READ:
1128                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1129                 break;
1130         case FMODE_WRITE:
1131                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1132                 break;
1133         case FMODE_READ|FMODE_WRITE:
1134                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1135                 break;
1136         default:
1137                 *p++ = cpu_to_be32(0);
1138         }
1139         *p++ = cpu_to_be32(0);          /* for linux, share_deny = 0 always */
1140 }
1141
1142 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1143 {
1144         __be32 *p;
1145  /*
1146  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1147  * owner 4 = 32
1148  */
1149         RESERVE_SPACE(8);
1150         *p++ = cpu_to_be32(OP_OPEN);
1151         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1152         encode_share_access(xdr, arg->fmode);
1153         RESERVE_SPACE(28);
1154         p = xdr_encode_hyper(p, arg->clientid);
1155         *p++ = cpu_to_be32(16);
1156         WRITEMEM("open id:", 8);
1157         p = xdr_encode_hyper(p, arg->id);
1158 }
1159
1160 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1161 {
1162         __be32 *p;
1163
1164         RESERVE_SPACE(4);
1165         switch(arg->open_flags & O_EXCL) {
1166         case 0:
1167                 *p++ = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1168                 encode_attrs(xdr, arg->u.attrs, arg->server);
1169                 break;
1170         default:
1171                 *p++ = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1172                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1173         }
1174 }
1175
1176 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1177 {
1178         __be32 *p;
1179
1180         RESERVE_SPACE(4);
1181         switch (arg->open_flags & O_CREAT) {
1182         case 0:
1183                 *p++ = cpu_to_be32(NFS4_OPEN_NOCREATE);
1184                 break;
1185         default:
1186                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1187                 *p++ = cpu_to_be32(NFS4_OPEN_CREATE);
1188                 encode_createmode(xdr, arg);
1189         }
1190 }
1191
1192 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1193 {
1194         __be32 *p;
1195
1196         RESERVE_SPACE(4);
1197         switch (delegation_type) {
1198         case 0:
1199                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1200                 break;
1201         case FMODE_READ:
1202                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1203                 break;
1204         case FMODE_WRITE|FMODE_READ:
1205                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1206                 break;
1207         default:
1208                 BUG();
1209         }
1210 }
1211
1212 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1213 {
1214         __be32 *p;
1215
1216         RESERVE_SPACE(4);
1217         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1218         encode_string(xdr, name->len, name->name);
1219 }
1220
1221 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1222 {
1223         __be32 *p;
1224
1225         RESERVE_SPACE(4);
1226         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1227         encode_delegation_type(xdr, type);
1228 }
1229
1230 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1231 {
1232         __be32 *p;
1233
1234         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1235         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1236         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1237         encode_string(xdr, name->len, name->name);
1238 }
1239
1240 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1241 {
1242         encode_openhdr(xdr, arg);
1243         encode_opentype(xdr, arg);
1244         switch (arg->claim) {
1245         case NFS4_OPEN_CLAIM_NULL:
1246                 encode_claim_null(xdr, arg->name);
1247                 break;
1248         case NFS4_OPEN_CLAIM_PREVIOUS:
1249                 encode_claim_previous(xdr, arg->u.delegation_type);
1250                 break;
1251         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1252                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1253                 break;
1254         default:
1255                 BUG();
1256         }
1257         hdr->nops++;
1258         hdr->replen += decode_open_maxsz;
1259 }
1260
1261 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1262 {
1263         __be32 *p;
1264
1265         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1266         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1267         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1268         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1269         hdr->nops++;
1270         hdr->replen += decode_open_confirm_maxsz;
1271 }
1272
1273 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1274 {
1275         __be32 *p;
1276
1277         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1278         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1279         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1280         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1281         encode_share_access(xdr, arg->fmode);
1282         hdr->nops++;
1283         hdr->replen += decode_open_downgrade_maxsz;
1284 }
1285
1286 static void
1287 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1288 {
1289         int len = fh->size;
1290         __be32 *p;
1291
1292         RESERVE_SPACE(8 + len);
1293         *p++ = cpu_to_be32(OP_PUTFH);
1294         *p++ = cpu_to_be32(len);
1295         WRITEMEM(fh->data, len);
1296         hdr->nops++;
1297         hdr->replen += decode_putfh_maxsz;
1298 }
1299
1300 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1301 {
1302         __be32 *p;
1303
1304         RESERVE_SPACE(4);
1305         *p++ = cpu_to_be32(OP_PUTROOTFH);
1306         hdr->nops++;
1307         hdr->replen += decode_putrootfh_maxsz;
1308 }
1309
1310 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1311 {
1312         nfs4_stateid stateid;
1313         __be32 *p;
1314
1315         RESERVE_SPACE(NFS4_STATEID_SIZE);
1316         if (ctx->state != NULL) {
1317                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1318                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1319         } else
1320                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1321 }
1322
1323 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1324 {
1325         __be32 *p;
1326
1327         RESERVE_SPACE(4);
1328         *p++ = cpu_to_be32(OP_READ);
1329
1330         encode_stateid(xdr, args->context);
1331
1332         RESERVE_SPACE(12);
1333         p = xdr_encode_hyper(p, args->offset);
1334         *p++ = cpu_to_be32(args->count);
1335         hdr->nops++;
1336         hdr->replen += decode_read_maxsz;
1337 }
1338
1339 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1340 {
1341         uint32_t attrs[2] = {
1342                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1343                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1344         };
1345         __be32 *p;
1346
1347         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1348         *p++ = cpu_to_be32(OP_READDIR);
1349         p = xdr_encode_hyper(p, readdir->cookie);
1350         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1351         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1352         *p++ = cpu_to_be32(readdir->count);
1353         *p++ = cpu_to_be32(2);
1354         /* Switch to mounted_on_fileid if the server supports it */
1355         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1356                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1357         else
1358                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1359         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1360         *p++ = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1361         hdr->nops++;
1362         hdr->replen += decode_readdir_maxsz;
1363         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1364                         __func__,
1365                         (unsigned long long)readdir->cookie,
1366                         ((u32 *)readdir->verifier.data)[0],
1367                         ((u32 *)readdir->verifier.data)[1],
1368                         attrs[0] & readdir->bitmask[0],
1369                         attrs[1] & readdir->bitmask[1]);
1370 }
1371
1372 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1373 {
1374         __be32 *p;
1375
1376         RESERVE_SPACE(4);
1377         *p++ = cpu_to_be32(OP_READLINK);
1378         hdr->nops++;
1379         hdr->replen += decode_readlink_maxsz;
1380 }
1381
1382 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1383 {
1384         __be32 *p;
1385
1386         RESERVE_SPACE(8 + name->len);
1387         *p++ = cpu_to_be32(OP_REMOVE);
1388         *p++ = cpu_to_be32(name->len);
1389         WRITEMEM(name->name, name->len);
1390         hdr->nops++;
1391         hdr->replen += decode_remove_maxsz;
1392 }
1393
1394 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1395 {
1396         __be32 *p;
1397
1398         RESERVE_SPACE(8 + oldname->len);
1399         *p++ = cpu_to_be32(OP_RENAME);
1400         *p++ = cpu_to_be32(oldname->len);
1401         WRITEMEM(oldname->name, oldname->len);
1402
1403         RESERVE_SPACE(4 + newname->len);
1404         *p++ = cpu_to_be32(newname->len);
1405         WRITEMEM(newname->name, newname->len);
1406         hdr->nops++;
1407         hdr->replen += decode_rename_maxsz;
1408 }
1409
1410 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1411 {
1412         __be32 *p;
1413
1414         RESERVE_SPACE(12);
1415         *p++ = cpu_to_be32(OP_RENEW);
1416         p = xdr_encode_hyper(p, client_stateid->cl_clientid);
1417         hdr->nops++;
1418         hdr->replen += decode_renew_maxsz;
1419 }
1420
1421 static void
1422 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1423 {
1424         __be32 *p;
1425
1426         RESERVE_SPACE(4);
1427         *p++ = cpu_to_be32(OP_RESTOREFH);
1428         hdr->nops++;
1429         hdr->replen += decode_restorefh_maxsz;
1430 }
1431
1432 static int
1433 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1434 {
1435         __be32 *p;
1436
1437         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1438         *p++ = cpu_to_be32(OP_SETATTR);
1439         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1440         RESERVE_SPACE(2*4);
1441         *p++ = cpu_to_be32(1);
1442         *p++ = cpu_to_be32(FATTR4_WORD0_ACL);
1443         if (arg->acl_len % 4)
1444                 return -EINVAL;
1445         RESERVE_SPACE(4);
1446         *p++ = cpu_to_be32(arg->acl_len);
1447         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1448         hdr->nops++;
1449         hdr->replen += decode_setacl_maxsz;
1450         return 0;
1451 }
1452
1453 static void
1454 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1455 {
1456         __be32 *p;
1457
1458         RESERVE_SPACE(4);
1459         *p++ = cpu_to_be32(OP_SAVEFH);
1460         hdr->nops++;
1461         hdr->replen += decode_savefh_maxsz;
1462 }
1463
1464 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1465 {
1466         __be32 *p;
1467
1468         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1469         *p++ = cpu_to_be32(OP_SETATTR);
1470         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1471         hdr->nops++;
1472         hdr->replen += decode_setattr_maxsz;
1473         encode_attrs(xdr, arg->iap, server);
1474 }
1475
1476 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1477 {
1478         __be32 *p;
1479
1480         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1481         *p++ = cpu_to_be32(OP_SETCLIENTID);
1482         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1483
1484         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1485         RESERVE_SPACE(4);
1486         *p++ = cpu_to_be32(setclientid->sc_prog);
1487         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1488         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1489         RESERVE_SPACE(4);
1490         *p++ = cpu_to_be32(setclientid->sc_cb_ident);
1491         hdr->nops++;
1492         hdr->replen += decode_setclientid_maxsz;
1493 }
1494
1495 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1496 {
1497         __be32 *p;
1498
1499         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1500         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1501         p = xdr_encode_hyper(p, client_state->cl_clientid);
1502         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1503         hdr->nops++;
1504         hdr->replen += decode_setclientid_confirm_maxsz;
1505 }
1506
1507 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         RESERVE_SPACE(4);
1512         *p++ = cpu_to_be32(OP_WRITE);
1513
1514         encode_stateid(xdr, args->context);
1515
1516         RESERVE_SPACE(16);
1517         p = xdr_encode_hyper(p, args->offset);
1518         *p++ = cpu_to_be32(args->stable);
1519         *p++ = cpu_to_be32(args->count);
1520
1521         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1522         hdr->nops++;
1523         hdr->replen += decode_write_maxsz;
1524 }
1525
1526 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1527 {
1528         __be32 *p;
1529
1530         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1531
1532         *p++ = cpu_to_be32(OP_DELEGRETURN);
1533         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1534         hdr->nops++;
1535         hdr->replen += decode_delegreturn_maxsz;
1536 }
1537
1538 #if defined(CONFIG_NFS_V4_1)
1539 /* NFSv4.1 operations */
1540 static void encode_exchange_id(struct xdr_stream *xdr,
1541                                struct nfs41_exchange_id_args *args,
1542                                struct compound_hdr *hdr)
1543 {
1544         __be32 *p;
1545
1546         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1547         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1548         WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
1549
1550         encode_string(xdr, args->id_len, args->id);
1551
1552         RESERVE_SPACE(12);
1553         *p++ = cpu_to_be32(args->flags);
1554         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1555         *p++ = cpu_to_be32(0);  /* zero length implementation id array */
1556         hdr->nops++;
1557         hdr->replen += decode_exchange_id_maxsz;
1558 }
1559
1560 static void encode_create_session(struct xdr_stream *xdr,
1561                                   struct nfs41_create_session_args *args,
1562                                   struct compound_hdr *hdr)
1563 {
1564         __be32 *p;
1565         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1566         uint32_t len;
1567         struct nfs_client *clp = args->client;
1568
1569         RESERVE_SPACE(4);
1570         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1571
1572         RESERVE_SPACE(8);
1573         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1574
1575         RESERVE_SPACE(8);
1576         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1577         *p++ = cpu_to_be32(args->flags);                        /*flags */
1578
1579         RESERVE_SPACE(2*28);                    /* 2 channel_attrs */
1580         /* Fore Channel */
1581         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1582         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1583         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1584         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1585         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1586         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1587         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1588
1589         /* Back Channel */
1590         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1591         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1592         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1593         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1594         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1595         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1596         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1597
1598         RESERVE_SPACE(4);
1599         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1600
1601         RESERVE_SPACE(4);                       /* # of security flavors */
1602         *p++ = cpu_to_be32(1);
1603
1604         RESERVE_SPACE(4);
1605         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1606
1607         /* authsys_parms rfc1831 */
1608         RESERVE_SPACE(4);
1609         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1610         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1611                         clp->cl_ipaddr);
1612         RESERVE_SPACE(16 + len);
1613         *p++ = cpu_to_be32(len);
1614         WRITEMEM(machine_name, len);
1615         *p++ = cpu_to_be32(0);                          /* UID */
1616         *p++ = cpu_to_be32(0);                          /* GID */
1617         *p++ = cpu_to_be32(0);                          /* No more gids */
1618         hdr->nops++;
1619         hdr->replen += decode_create_session_maxsz;
1620 }
1621
1622 static void encode_destroy_session(struct xdr_stream *xdr,
1623                                    struct nfs4_session *session,
1624                                    struct compound_hdr *hdr)
1625 {
1626         __be32 *p;
1627         RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN);
1628         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1629         WRITEMEM(session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1630         hdr->nops++;
1631         hdr->replen += decode_destroy_session_maxsz;
1632 }
1633 #endif /* CONFIG_NFS_V4_1 */
1634
1635 static void encode_sequence(struct xdr_stream *xdr,
1636                             const struct nfs4_sequence_args *args,
1637                             struct compound_hdr *hdr)
1638 {
1639 #if defined(CONFIG_NFS_V4_1)
1640         struct nfs4_session *session = args->sa_session;
1641         struct nfs4_slot_table *tp;
1642         struct nfs4_slot *slot;
1643         __be32 *p;
1644
1645         if (!session)
1646                 return;
1647
1648         tp = &session->fc_slot_table;
1649
1650         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1651         slot = tp->slots + args->sa_slotid;
1652
1653         RESERVE_SPACE(4);
1654         *p++ = cpu_to_be32(OP_SEQUENCE);
1655
1656         /*
1657          * Sessionid + seqid + slotid + max slotid + cache_this
1658          */
1659         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1660                 "max_slotid=%d cache_this=%d\n",
1661                 __func__,
1662                 ((u32 *)session->sess_id.data)[0],
1663                 ((u32 *)session->sess_id.data)[1],
1664                 ((u32 *)session->sess_id.data)[2],
1665                 ((u32 *)session->sess_id.data)[3],
1666                 slot->seq_nr, args->sa_slotid,
1667                 tp->highest_used_slotid, args->sa_cache_this);
1668         RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 16);
1669         WRITEMEM(session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1670         *p++ = cpu_to_be32(slot->seq_nr);
1671         *p++ = cpu_to_be32(args->sa_slotid);
1672         *p++ = cpu_to_be32(tp->highest_used_slotid);
1673         *p++ = cpu_to_be32(args->sa_cache_this);
1674         hdr->nops++;
1675         hdr->replen += decode_sequence_maxsz;
1676 #endif /* CONFIG_NFS_V4_1 */
1677 }
1678
1679 /*
1680  * END OF "GENERIC" ENCODE ROUTINES.
1681  */
1682
1683 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1684 {
1685 #if defined(CONFIG_NFS_V4_1)
1686         if (args->sa_session)
1687                 return args->sa_session->clp->cl_minorversion;
1688 #endif /* CONFIG_NFS_V4_1 */
1689         return 0;
1690 }
1691
1692 /*
1693  * Encode an ACCESS request
1694  */
1695 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1696 {
1697         struct xdr_stream xdr;
1698         struct compound_hdr hdr = {
1699                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1700         };
1701
1702         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1703         encode_compound_hdr(&xdr, req, &hdr);
1704         encode_sequence(&xdr, &args->seq_args, &hdr);
1705         encode_putfh(&xdr, args->fh, &hdr);
1706         encode_access(&xdr, args->access, &hdr);
1707         encode_getfattr(&xdr, args->bitmask, &hdr);
1708         encode_nops(&hdr);
1709         return 0;
1710 }
1711
1712 /*
1713  * Encode LOOKUP request
1714  */
1715 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1716 {
1717         struct xdr_stream xdr;
1718         struct compound_hdr hdr = {
1719                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1720         };
1721
1722         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1723         encode_compound_hdr(&xdr, req, &hdr);
1724         encode_sequence(&xdr, &args->seq_args, &hdr);
1725         encode_putfh(&xdr, args->dir_fh, &hdr);
1726         encode_lookup(&xdr, args->name, &hdr);
1727         encode_getfh(&xdr, &hdr);
1728         encode_getfattr(&xdr, args->bitmask, &hdr);
1729         encode_nops(&hdr);
1730         return 0;
1731 }
1732
1733 /*
1734  * Encode LOOKUP_ROOT request
1735  */
1736 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1737 {
1738         struct xdr_stream xdr;
1739         struct compound_hdr hdr = {
1740                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1741         };
1742
1743         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744         encode_compound_hdr(&xdr, req, &hdr);
1745         encode_sequence(&xdr, &args->seq_args, &hdr);
1746         encode_putrootfh(&xdr, &hdr);
1747         encode_getfh(&xdr, &hdr);
1748         encode_getfattr(&xdr, args->bitmask, &hdr);
1749         encode_nops(&hdr);
1750         return 0;
1751 }
1752
1753 /*
1754  * Encode REMOVE request
1755  */
1756 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1757 {
1758         struct xdr_stream xdr;
1759         struct compound_hdr hdr = {
1760                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1761         };
1762
1763         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1764         encode_compound_hdr(&xdr, req, &hdr);
1765         encode_sequence(&xdr, &args->seq_args, &hdr);
1766         encode_putfh(&xdr, args->fh, &hdr);
1767         encode_remove(&xdr, &args->name, &hdr);
1768         encode_getfattr(&xdr, args->bitmask, &hdr);
1769         encode_nops(&hdr);
1770         return 0;
1771 }
1772
1773 /*
1774  * Encode RENAME request
1775  */
1776 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_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->old_dir, &hdr);
1787         encode_savefh(&xdr, &hdr);
1788         encode_putfh(&xdr, args->new_dir, &hdr);
1789         encode_rename(&xdr, args->old_name, args->new_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 LINK request
1799  */
1800 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_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->fh, &hdr);
1811         encode_savefh(&xdr, &hdr);
1812         encode_putfh(&xdr, args->dir_fh, &hdr);
1813         encode_link(&xdr, args->name, &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 CREATE request
1823  */
1824 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1825 {
1826         struct xdr_stream xdr;
1827         struct compound_hdr hdr = {
1828                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1829         };
1830
1831         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1832         encode_compound_hdr(&xdr, req, &hdr);
1833         encode_sequence(&xdr, &args->seq_args, &hdr);
1834         encode_putfh(&xdr, args->dir_fh, &hdr);
1835         encode_savefh(&xdr, &hdr);
1836         encode_create(&xdr, args, &hdr);
1837         encode_getfh(&xdr, &hdr);
1838         encode_getfattr(&xdr, args->bitmask, &hdr);
1839         encode_restorefh(&xdr, &hdr);
1840         encode_getfattr(&xdr, args->bitmask, &hdr);
1841         encode_nops(&hdr);
1842         return 0;
1843 }
1844
1845 /*
1846  * Encode SYMLINK request
1847  */
1848 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1849 {
1850         return nfs4_xdr_enc_create(req, p, args);
1851 }
1852
1853 /*
1854  * Encode GETATTR request
1855  */
1856 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1857 {
1858         struct xdr_stream xdr;
1859         struct compound_hdr hdr = {
1860                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1861         };
1862
1863         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1864         encode_compound_hdr(&xdr, req, &hdr);
1865         encode_sequence(&xdr, &args->seq_args, &hdr);
1866         encode_putfh(&xdr, args->fh, &hdr);
1867         encode_getfattr(&xdr, args->bitmask, &hdr);
1868         encode_nops(&hdr);
1869         return 0;
1870 }
1871
1872 /*
1873  * Encode a CLOSE request
1874  */
1875 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1876 {
1877         struct xdr_stream xdr;
1878         struct compound_hdr hdr = {
1879                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1880         };
1881
1882         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1883         encode_compound_hdr(&xdr, req, &hdr);
1884         encode_sequence(&xdr, &args->seq_args, &hdr);
1885         encode_putfh(&xdr, args->fh, &hdr);
1886         encode_close(&xdr, args, &hdr);
1887         encode_getfattr(&xdr, args->bitmask, &hdr);
1888         encode_nops(&hdr);
1889         return 0;
1890 }
1891
1892 /*
1893  * Encode an OPEN request
1894  */
1895 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1896 {
1897         struct xdr_stream xdr;
1898         struct compound_hdr hdr = {
1899                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1900         };
1901
1902         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1903         encode_compound_hdr(&xdr, req, &hdr);
1904         encode_sequence(&xdr, &args->seq_args, &hdr);
1905         encode_putfh(&xdr, args->fh, &hdr);
1906         encode_savefh(&xdr, &hdr);
1907         encode_open(&xdr, args, &hdr);
1908         encode_getfh(&xdr, &hdr);
1909         encode_getfattr(&xdr, args->bitmask, &hdr);
1910         encode_restorefh(&xdr, &hdr);
1911         encode_getfattr(&xdr, args->bitmask, &hdr);
1912         encode_nops(&hdr);
1913         return 0;
1914 }
1915
1916 /*
1917  * Encode an OPEN_CONFIRM request
1918  */
1919 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .nops   = 0,
1924         };
1925
1926         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1927         encode_compound_hdr(&xdr, req, &hdr);
1928         encode_putfh(&xdr, args->fh, &hdr);
1929         encode_open_confirm(&xdr, args, &hdr);
1930         encode_nops(&hdr);
1931         return 0;
1932 }
1933
1934 /*
1935  * Encode an OPEN request with no attributes.
1936  */
1937 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1938 {
1939         struct xdr_stream xdr;
1940         struct compound_hdr hdr = {
1941                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1942         };
1943
1944         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1945         encode_compound_hdr(&xdr, req, &hdr);
1946         encode_sequence(&xdr, &args->seq_args, &hdr);
1947         encode_putfh(&xdr, args->fh, &hdr);
1948         encode_open(&xdr, args, &hdr);
1949         encode_getfattr(&xdr, args->bitmask, &hdr);
1950         encode_nops(&hdr);
1951         return 0;
1952 }
1953
1954 /*
1955  * Encode an OPEN_DOWNGRADE request
1956  */
1957 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1958 {
1959         struct xdr_stream xdr;
1960         struct compound_hdr hdr = {
1961                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1962         };
1963
1964         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1965         encode_compound_hdr(&xdr, req, &hdr);
1966         encode_sequence(&xdr, &args->seq_args, &hdr);
1967         encode_putfh(&xdr, args->fh, &hdr);
1968         encode_open_downgrade(&xdr, args, &hdr);
1969         encode_getfattr(&xdr, args->bitmask, &hdr);
1970         encode_nops(&hdr);
1971         return 0;
1972 }
1973
1974 /*
1975  * Encode a LOCK request
1976  */
1977 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1978 {
1979         struct xdr_stream xdr;
1980         struct compound_hdr hdr = {
1981                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1982         };
1983
1984         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1985         encode_compound_hdr(&xdr, req, &hdr);
1986         encode_sequence(&xdr, &args->seq_args, &hdr);
1987         encode_putfh(&xdr, args->fh, &hdr);
1988         encode_lock(&xdr, args, &hdr);
1989         encode_nops(&hdr);
1990         return 0;
1991 }
1992
1993 /*
1994  * Encode a LOCKT request
1995  */
1996 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1997 {
1998         struct xdr_stream xdr;
1999         struct compound_hdr hdr = {
2000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2001         };
2002
2003         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2004         encode_compound_hdr(&xdr, req, &hdr);
2005         encode_sequence(&xdr, &args->seq_args, &hdr);
2006         encode_putfh(&xdr, args->fh, &hdr);
2007         encode_lockt(&xdr, args, &hdr);
2008         encode_nops(&hdr);
2009         return 0;
2010 }
2011
2012 /*
2013  * Encode a LOCKU request
2014  */
2015 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2016 {
2017         struct xdr_stream xdr;
2018         struct compound_hdr hdr = {
2019                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2020         };
2021
2022         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2023         encode_compound_hdr(&xdr, req, &hdr);
2024         encode_sequence(&xdr, &args->seq_args, &hdr);
2025         encode_putfh(&xdr, args->fh, &hdr);
2026         encode_locku(&xdr, args, &hdr);
2027         encode_nops(&hdr);
2028         return 0;
2029 }
2030
2031 /*
2032  * Encode a READLINK request
2033  */
2034 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2035 {
2036         struct xdr_stream xdr;
2037         struct compound_hdr hdr = {
2038                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2039         };
2040
2041         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2042         encode_compound_hdr(&xdr, req, &hdr);
2043         encode_sequence(&xdr, &args->seq_args, &hdr);
2044         encode_putfh(&xdr, args->fh, &hdr);
2045         encode_readlink(&xdr, args, req, &hdr);
2046
2047         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2048                         args->pgbase, args->pglen);
2049         encode_nops(&hdr);
2050         return 0;
2051 }
2052
2053 /*
2054  * Encode a READDIR request
2055  */
2056 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2057 {
2058         struct xdr_stream xdr;
2059         struct compound_hdr hdr = {
2060                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2061         };
2062
2063         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2064         encode_compound_hdr(&xdr, req, &hdr);
2065         encode_sequence(&xdr, &args->seq_args, &hdr);
2066         encode_putfh(&xdr, args->fh, &hdr);
2067         encode_readdir(&xdr, args, req, &hdr);
2068
2069         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2070                          args->pgbase, args->count);
2071         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2072                         __func__, hdr.replen << 2, args->pages,
2073                         args->pgbase, args->count);
2074         encode_nops(&hdr);
2075         return 0;
2076 }
2077
2078 /*
2079  * Encode a READ request
2080  */
2081 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2082 {
2083         struct xdr_stream xdr;
2084         struct compound_hdr hdr = {
2085                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2086         };
2087
2088         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2089         encode_compound_hdr(&xdr, req, &hdr);
2090         encode_sequence(&xdr, &args->seq_args, &hdr);
2091         encode_putfh(&xdr, args->fh, &hdr);
2092         encode_read(&xdr, args, &hdr);
2093
2094         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2095                          args->pages, args->pgbase, args->count);
2096         req->rq_rcv_buf.flags |= XDRBUF_READ;
2097         encode_nops(&hdr);
2098         return 0;
2099 }
2100
2101 /*
2102  * Encode an SETATTR request
2103  */
2104 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2105 {
2106         struct xdr_stream xdr;
2107         struct compound_hdr hdr = {
2108                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2109         };
2110
2111         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2112         encode_compound_hdr(&xdr, req, &hdr);
2113         encode_sequence(&xdr, &args->seq_args, &hdr);
2114         encode_putfh(&xdr, args->fh, &hdr);
2115         encode_setattr(&xdr, args, args->server, &hdr);
2116         encode_getfattr(&xdr, args->bitmask, &hdr);
2117         encode_nops(&hdr);
2118         return 0;
2119 }
2120
2121 /*
2122  * Encode a GETACL request
2123  */
2124 static int
2125 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2126                 struct nfs_getaclargs *args)
2127 {
2128         struct xdr_stream xdr;
2129         struct compound_hdr hdr = {
2130                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2131         };
2132         uint32_t replen;
2133
2134         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2135         encode_compound_hdr(&xdr, req, &hdr);
2136         encode_sequence(&xdr, &args->seq_args, &hdr);
2137         encode_putfh(&xdr, args->fh, &hdr);
2138         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2139         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2140
2141         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2142                 args->acl_pages, args->acl_pgbase, args->acl_len);
2143         encode_nops(&hdr);
2144         return 0;
2145 }
2146
2147 /*
2148  * Encode a WRITE request
2149  */
2150 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2151 {
2152         struct xdr_stream xdr;
2153         struct compound_hdr hdr = {
2154                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2155         };
2156
2157         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2158         encode_compound_hdr(&xdr, req, &hdr);
2159         encode_sequence(&xdr, &args->seq_args, &hdr);
2160         encode_putfh(&xdr, args->fh, &hdr);
2161         encode_write(&xdr, args, &hdr);
2162         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2163         encode_getfattr(&xdr, args->bitmask, &hdr);
2164         encode_nops(&hdr);
2165         return 0;
2166 }
2167
2168 /*
2169  *  a COMMIT request
2170  */
2171 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2172 {
2173         struct xdr_stream xdr;
2174         struct compound_hdr hdr = {
2175                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176         };
2177
2178         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2179         encode_compound_hdr(&xdr, req, &hdr);
2180         encode_sequence(&xdr, &args->seq_args, &hdr);
2181         encode_putfh(&xdr, args->fh, &hdr);
2182         encode_commit(&xdr, args, &hdr);
2183         encode_getfattr(&xdr, args->bitmask, &hdr);
2184         encode_nops(&hdr);
2185         return 0;
2186 }
2187
2188 /*
2189  * FSINFO request
2190  */
2191 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2192 {
2193         struct xdr_stream xdr;
2194         struct compound_hdr hdr = {
2195                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196         };
2197
2198         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2199         encode_compound_hdr(&xdr, req, &hdr);
2200         encode_sequence(&xdr, &args->seq_args, &hdr);
2201         encode_putfh(&xdr, args->fh, &hdr);
2202         encode_fsinfo(&xdr, args->bitmask, &hdr);
2203         encode_nops(&hdr);
2204         return 0;
2205 }
2206
2207 /*
2208  * a PATHCONF request
2209  */
2210 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2211 {
2212         struct xdr_stream xdr;
2213         struct compound_hdr hdr = {
2214                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2215         };
2216
2217         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2218         encode_compound_hdr(&xdr, req, &hdr);
2219         encode_sequence(&xdr, &args->seq_args, &hdr);
2220         encode_putfh(&xdr, args->fh, &hdr);
2221         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2222                            &hdr);
2223         encode_nops(&hdr);
2224         return 0;
2225 }
2226
2227 /*
2228  * a STATFS request
2229  */
2230 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2231 {
2232         struct xdr_stream xdr;
2233         struct compound_hdr hdr = {
2234                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2235         };
2236
2237         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2238         encode_compound_hdr(&xdr, req, &hdr);
2239         encode_sequence(&xdr, &args->seq_args, &hdr);
2240         encode_putfh(&xdr, args->fh, &hdr);
2241         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2242                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2243         encode_nops(&hdr);
2244         return 0;
2245 }
2246
2247 /*
2248  * GETATTR_BITMAP request
2249  */
2250 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2251                                     struct nfs4_server_caps_arg *args)
2252 {
2253         struct xdr_stream xdr;
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2259         encode_compound_hdr(&xdr, req, &hdr);
2260         encode_sequence(&xdr, &args->seq_args, &hdr);
2261         encode_putfh(&xdr, args->fhandle, &hdr);
2262         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2263                            FATTR4_WORD0_LINK_SUPPORT|
2264                            FATTR4_WORD0_SYMLINK_SUPPORT|
2265                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2266         encode_nops(&hdr);
2267         return 0;
2268 }
2269
2270 /*
2271  * a RENEW request
2272  */
2273 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2274 {
2275         struct xdr_stream xdr;
2276         struct compound_hdr hdr = {
2277                 .nops   = 0,
2278         };
2279
2280         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2281         encode_compound_hdr(&xdr, req, &hdr);
2282         encode_renew(&xdr, clp, &hdr);
2283         encode_nops(&hdr);
2284         return 0;
2285 }
2286
2287 /*
2288  * a SETCLIENTID request
2289  */
2290 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2291 {
2292         struct xdr_stream xdr;
2293         struct compound_hdr hdr = {
2294                 .nops   = 0,
2295         };
2296
2297         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2298         encode_compound_hdr(&xdr, req, &hdr);
2299         encode_setclientid(&xdr, sc, &hdr);
2300         encode_nops(&hdr);
2301         return 0;
2302 }
2303
2304 /*
2305  * a SETCLIENTID_CONFIRM request
2306  */
2307 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2308 {
2309         struct xdr_stream xdr;
2310         struct compound_hdr hdr = {
2311                 .nops   = 0,
2312         };
2313         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2314
2315         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2316         encode_compound_hdr(&xdr, req, &hdr);
2317         encode_setclientid_confirm(&xdr, clp, &hdr);
2318         encode_putrootfh(&xdr, &hdr);
2319         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2320         encode_nops(&hdr);
2321         return 0;
2322 }
2323
2324 /*
2325  * DELEGRETURN request
2326  */
2327 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2328 {
2329         struct xdr_stream xdr;
2330         struct compound_hdr hdr = {
2331                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332         };
2333
2334         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2335         encode_compound_hdr(&xdr, req, &hdr);
2336         encode_sequence(&xdr, &args->seq_args, &hdr);
2337         encode_putfh(&xdr, args->fhandle, &hdr);
2338         encode_delegreturn(&xdr, args->stateid, &hdr);
2339         encode_getfattr(&xdr, args->bitmask, &hdr);
2340         encode_nops(&hdr);
2341         return 0;
2342 }
2343
2344 /*
2345  * Encode FS_LOCATIONS request
2346  */
2347 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2348 {
2349         struct xdr_stream xdr;
2350         struct compound_hdr hdr = {
2351                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2352         };
2353         uint32_t replen;
2354
2355         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2356         encode_compound_hdr(&xdr, req, &hdr);
2357         encode_sequence(&xdr, &args->seq_args, &hdr);
2358         encode_putfh(&xdr, args->dir_fh, &hdr);
2359         encode_lookup(&xdr, args->name, &hdr);
2360         replen = hdr.replen;    /* get the attribute into args->page */
2361         encode_fs_locations(&xdr, args->bitmask, &hdr);
2362
2363         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2364                         0, PAGE_SIZE);
2365         encode_nops(&hdr);
2366         return 0;
2367 }
2368
2369 #if defined(CONFIG_NFS_V4_1)
2370 /*
2371  * EXCHANGE_ID request
2372  */
2373 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2374                                     struct nfs41_exchange_id_args *args)
2375 {
2376         struct xdr_stream xdr;
2377         struct compound_hdr hdr = {
2378                 .minorversion = args->client->cl_minorversion,
2379         };
2380
2381         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2382         encode_compound_hdr(&xdr, req, &hdr);
2383         encode_exchange_id(&xdr, args, &hdr);
2384         encode_nops(&hdr);
2385         return 0;
2386 }
2387
2388 /*
2389  * a CREATE_SESSION request
2390  */
2391 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2392                                        struct nfs41_create_session_args *args)
2393 {
2394         struct xdr_stream xdr;
2395         struct compound_hdr hdr = {
2396                 .minorversion = args->client->cl_minorversion,
2397         };
2398
2399         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2400         encode_compound_hdr(&xdr, req, &hdr);
2401         encode_create_session(&xdr, args, &hdr);
2402         encode_nops(&hdr);
2403         return 0;
2404 }
2405
2406 /*
2407  * a DESTROY_SESSION request
2408  */
2409 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2410                                         struct nfs4_session *session)
2411 {
2412         struct xdr_stream xdr;
2413         struct compound_hdr hdr = {
2414                 .minorversion = session->clp->cl_minorversion,
2415         };
2416
2417         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2418         encode_compound_hdr(&xdr, req, &hdr);
2419         encode_destroy_session(&xdr, session, &hdr);
2420         encode_nops(&hdr);
2421         return 0;
2422 }
2423
2424 /*
2425  * a SEQUENCE request
2426  */
2427 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2428                                  struct nfs4_sequence_args *args)
2429 {
2430         struct xdr_stream xdr;
2431         struct compound_hdr hdr = {
2432                 .minorversion = nfs4_xdr_minorversion(args),
2433         };
2434
2435         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2436         encode_compound_hdr(&xdr, req, &hdr);
2437         encode_sequence(&xdr, args, &hdr);
2438         encode_nops(&hdr);
2439         return 0;
2440 }
2441
2442 /*
2443  * a GET_LEASE_TIME request
2444  */
2445 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2446                                        struct nfs4_get_lease_time_args *args)
2447 {
2448         struct xdr_stream xdr;
2449         struct compound_hdr hdr = {
2450                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2451         };
2452         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2453
2454         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2455         encode_compound_hdr(&xdr, req, &hdr);
2456         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2457         encode_putrootfh(&xdr, &hdr);
2458         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2459         encode_nops(&hdr);
2460         return 0;
2461 }
2462 #endif /* CONFIG_NFS_V4_1 */
2463
2464 /*
2465  * START OF "GENERIC" DECODE ROUTINES.
2466  *   These may look a little ugly since they are imported from a "generic"
2467  * set of XDR encode/decode routines which are intended to be shared by
2468  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2469  *
2470  * If the pain of reading these is too great, it should be a straightforward
2471  * task to translate them into Linux-specific versions which are more
2472  * consistent with the style used in NFSv2/v3...
2473  */
2474 #define READ32(x)         (x) = ntohl(*p++)
2475 #define READ64(x)         do {                  \
2476         (x) = (u64)ntohl(*p++) << 32;           \
2477         (x) |= ntohl(*p++);                     \
2478 } while (0)
2479 #define READTIME(x)       do {                  \
2480         p++;                                    \
2481         (x.tv_sec) = ntohl(*p++);               \
2482         (x.tv_nsec) = ntohl(*p++);              \
2483 } while (0)
2484 #define COPYMEM(x,nbytes) do {                  \
2485         memcpy((x), p, nbytes);                 \
2486         p += XDR_QUADLEN(nbytes);               \
2487 } while (0)
2488
2489 #define READ_BUF(nbytes)  do { \
2490         p = xdr_inline_decode(xdr, nbytes); \
2491         if (unlikely(!p)) { \
2492                 dprintk("nfs: %s: prematurely hit end of receive" \
2493                                 " buffer\n", __func__); \
2494                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2495                                 __func__, xdr->p, nbytes, xdr->end); \
2496                 return -EIO; \
2497         } \
2498 } while (0)
2499
2500 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2501 {
2502         __be32 *p;
2503
2504         READ_BUF(4);
2505         READ32(*len);
2506         READ_BUF(*len);
2507         *string = (char *)p;
2508         return 0;
2509 }
2510
2511 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2512 {
2513         __be32 *p;
2514
2515         READ_BUF(8);
2516         READ32(hdr->status);
2517         READ32(hdr->taglen);
2518
2519         READ_BUF(hdr->taglen + 4);
2520         hdr->tag = (char *)p;
2521         p += XDR_QUADLEN(hdr->taglen);
2522         READ32(hdr->nops);
2523         if (unlikely(hdr->nops < 1))
2524                 return nfs4_stat_to_errno(hdr->status);
2525         return 0;
2526 }
2527
2528 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2529 {
2530         __be32 *p;
2531         uint32_t opnum;
2532         int32_t nfserr;
2533
2534         READ_BUF(8);
2535         READ32(opnum);
2536         if (opnum != expected) {
2537                 dprintk("nfs: Server returned operation"
2538                         " %d but we issued a request for %d\n",
2539                                 opnum, expected);
2540                 return -EIO;
2541         }
2542         READ32(nfserr);
2543         if (nfserr != NFS_OK)
2544                 return nfs4_stat_to_errno(nfserr);
2545         return 0;
2546 }
2547
2548 /* Dummy routine */
2549 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2550 {
2551         __be32 *p;
2552         unsigned int strlen;
2553         char *str;
2554
2555         READ_BUF(12);
2556         return decode_opaque_inline(xdr, &strlen, &str);
2557 }
2558
2559 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2560 {
2561         uint32_t bmlen;
2562         __be32 *p;
2563
2564         READ_BUF(4);
2565         READ32(bmlen);
2566
2567         bitmap[0] = bitmap[1] = 0;
2568         READ_BUF((bmlen << 2));
2569         if (bmlen > 0) {
2570                 READ32(bitmap[0]);
2571                 if (bmlen > 1)
2572                         READ32(bitmap[1]);
2573         }
2574         return 0;
2575 }
2576
2577 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2578 {
2579         __be32 *p;
2580
2581         READ_BUF(4);
2582         READ32(*attrlen);
2583         *savep = xdr->p;
2584         return 0;
2585 }
2586
2587 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2588 {
2589         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2590                 decode_attr_bitmap(xdr, bitmask);
2591                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2592         } else
2593                 bitmask[0] = bitmask[1] = 0;
2594         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2595         return 0;
2596 }
2597
2598 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2599 {
2600         __be32 *p;
2601         int ret = 0;
2602
2603         *type = 0;
2604         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2605                 return -EIO;
2606         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2607                 READ_BUF(4);
2608                 READ32(*type);
2609                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2610                         dprintk("%s: bad type %d\n", __func__, *type);
2611                         return -EIO;
2612                 }
2613                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2614                 ret = NFS_ATTR_FATTR_TYPE;
2615         }
2616         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2617         return ret;
2618 }
2619
2620 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2621 {
2622         __be32 *p;
2623         int ret = 0;
2624
2625         *change = 0;
2626         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2627                 return -EIO;
2628         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2629                 READ_BUF(8);
2630                 READ64(*change);
2631                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2632                 ret = NFS_ATTR_FATTR_CHANGE;
2633         }
2634         dprintk("%s: change attribute=%Lu\n", __func__,
2635                         (unsigned long long)*change);
2636         return ret;
2637 }
2638
2639 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2640 {
2641         __be32 *p;
2642         int ret = 0;
2643
2644         *size = 0;
2645         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2646                 return -EIO;
2647         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2648                 READ_BUF(8);
2649                 READ64(*size);
2650                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2651                 ret = NFS_ATTR_FATTR_SIZE;
2652         }
2653         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2654         return ret;
2655 }
2656
2657 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2658 {
2659         __be32 *p;
2660
2661         *res = 0;
2662         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2663                 return -EIO;
2664         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2665                 READ_BUF(4);
2666                 READ32(*res);
2667                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2668         }
2669         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2670         return 0;
2671 }
2672
2673 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2674 {
2675         __be32 *p;
2676
2677         *res = 0;
2678         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2679                 return -EIO;
2680         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2681                 READ_BUF(4);
2682                 READ32(*res);
2683                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2684         }
2685         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2686         return 0;
2687 }
2688
2689 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2690 {
2691         __be32 *p;
2692         int ret = 0;
2693
2694         fsid->major = 0;
2695         fsid->minor = 0;
2696         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2697                 return -EIO;
2698         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2699                 READ_BUF(16);
2700                 READ64(fsid->major);
2701                 READ64(fsid->minor);
2702                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2703                 ret = NFS_ATTR_FATTR_FSID;
2704         }
2705         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2706                         (unsigned long long)fsid->major,
2707                         (unsigned long long)fsid->minor);
2708         return ret;
2709 }
2710
2711 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2712 {
2713         __be32 *p;
2714
2715         *res = 60;
2716         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2717                 return -EIO;
2718         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2719                 READ_BUF(4);
2720                 READ32(*res);
2721                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2722         }
2723         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2724         return 0;
2725 }
2726
2727 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2728 {
2729         __be32 *p;
2730
2731         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2732         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2733                 return -EIO;
2734         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2735                 READ_BUF(4);
2736                 READ32(*res);
2737                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2738         }
2739         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2740         return 0;
2741 }
2742
2743 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2744 {
2745         __be32 *p;
2746         int ret = 0;
2747
2748         *fileid = 0;
2749         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2750                 return -EIO;
2751         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2752                 READ_BUF(8);
2753                 READ64(*fileid);
2754                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2755                 ret = NFS_ATTR_FATTR_FILEID;
2756         }
2757         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2758         return ret;
2759 }
2760
2761 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2762 {
2763         __be32 *p;
2764         int ret = 0;
2765
2766         *fileid = 0;
2767         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2768                 return -EIO;
2769         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2770                 READ_BUF(8);
2771                 READ64(*fileid);
2772                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2773                 ret = NFS_ATTR_FATTR_FILEID;
2774         }
2775         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2776         return ret;
2777 }
2778
2779 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2780 {
2781         __be32 *p;
2782         int status = 0;
2783
2784         *res = 0;
2785         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2786                 return -EIO;
2787         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2788                 READ_BUF(8);
2789                 READ64(*res);
2790                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2791         }
2792         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2793         return status;
2794 }
2795
2796 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2797 {
2798         __be32 *p;
2799         int status = 0;
2800
2801         *res = 0;
2802         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2803                 return -EIO;
2804         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2805                 READ_BUF(8);
2806                 READ64(*res);
2807                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2808         }
2809         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2810         return status;
2811 }
2812
2813 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2814 {
2815         __be32 *p;
2816         int status = 0;
2817
2818         *res = 0;
2819         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2820                 return -EIO;
2821         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2822                 READ_BUF(8);
2823                 READ64(*res);
2824                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2825         }
2826         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2827         return status;
2828 }
2829
2830 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2831 {
2832         u32 n;
2833         __be32 *p;
2834         int status = 0;
2835
2836         READ_BUF(4);
2837         READ32(n);
2838         if (n == 0)
2839                 goto root_path;
2840         dprintk("path ");
2841         path->ncomponents = 0;
2842         while (path->ncomponents < n) {
2843                 struct nfs4_string *component = &path->components[path->ncomponents];
2844                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2845                 if (unlikely(status != 0))
2846                         goto out_eio;
2847                 if (path->ncomponents != n)
2848                         dprintk("/");
2849                 dprintk("%s", component->data);
2850                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2851                         path->ncomponents++;
2852                 else {
2853                         dprintk("cannot parse %d components in path\n", n);
2854                         goto out_eio;
2855                 }
2856         }
2857 out:
2858         dprintk("\n");
2859         return status;
2860 root_path:
2861 /* a root pathname is sent as a zero component4 */
2862         path->ncomponents = 1;
2863         path->components[0].len=0;
2864         path->components[0].data=NULL;
2865         dprintk("path /\n");
2866         goto out;
2867 out_eio:
2868         dprintk(" status %d", status);
2869         status = -EIO;
2870         goto out;
2871 }
2872
2873 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2874 {
2875         int n;
2876         __be32 *p;
2877         int status = -EIO;
2878
2879         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2880                 goto out;
2881         status = 0;
2882         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2883                 goto out;
2884         dprintk("%s: fsroot ", __func__);
2885         status = decode_pathname(xdr, &res->fs_path);
2886         if (unlikely(status != 0))
2887                 goto out;
2888         READ_BUF(4);
2889         READ32(n);
2890         if (n <= 0)
2891                 goto out_eio;
2892         res->nlocations = 0;
2893         while (res->nlocations < n) {
2894                 u32 m;
2895                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2896
2897                 READ_BUF(4);
2898                 READ32(m);
2899
2900                 loc->nservers = 0;
2901                 dprintk("%s: servers ", __func__);
2902                 while (loc->nservers < m) {
2903                         struct nfs4_string *server = &loc->servers[loc->nservers];
2904                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2905                         if (unlikely(status != 0))
2906                                 goto out_eio;
2907                         dprintk("%s ", server->data);
2908                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2909                                 loc->nservers++;
2910                         else {
2911                                 unsigned int i;
2912                                 dprintk("%s: using first %u of %u servers "
2913                                         "returned for location %u\n",
2914                                                 __func__,
2915                                                 NFS4_FS_LOCATION_MAXSERVERS,
2916                                                 m, res->nlocations);
2917                                 for (i = loc->nservers; i < m; i++) {
2918                                         unsigned int len;
2919                                         char *data;
2920                                         status = decode_opaque_inline(xdr, &len, &data);
2921                                         if (unlikely(status != 0))
2922                                                 goto out_eio;
2923                                 }
2924                         }
2925                 }
2926                 status = decode_pathname(xdr, &loc->rootpath);
2927                 if (unlikely(status != 0))
2928                         goto out_eio;
2929                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2930                         res->nlocations++;
2931         }
2932         if (res->nlocations != 0)
2933                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2934 out:
2935         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2936         return status;
2937 out_eio:
2938         status = -EIO;
2939         goto out;
2940 }
2941
2942 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2943 {
2944         __be32 *p;
2945         int status = 0;
2946
2947         *res = 0;
2948         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2949                 return -EIO;
2950         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2951                 READ_BUF(8);
2952                 READ64(*res);
2953                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2954         }
2955         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2956         return status;
2957 }
2958
2959 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2960 {
2961         __be32 *p;
2962         int status = 0;
2963
2964         *maxlink = 1;
2965         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2966                 return -EIO;
2967         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2968                 READ_BUF(4);
2969                 READ32(*maxlink);
2970                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2971         }
2972         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2973         return status;
2974 }
2975
2976 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2977 {
2978         __be32 *p;
2979         int status = 0;
2980
2981         *maxname = 1024;
2982         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2983                 return -EIO;
2984         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2985                 READ_BUF(4);
2986                 READ32(*maxname);
2987                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2988         }
2989         dprintk("%s: maxname=%u\n", __func__, *maxname);
2990         return status;
2991 }
2992
2993 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2994 {
2995         __be32 *p;
2996         int status = 0;
2997
2998         *res = 1024;
2999         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3000                 return -EIO;
3001         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3002                 uint64_t maxread;
3003                 READ_BUF(8);
3004                 READ64(maxread);
3005                 if (maxread > 0x7FFFFFFF)
3006                         maxread = 0x7FFFFFFF;
3007                 *res = (uint32_t)maxread;
3008                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3009         }
3010         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3011         return status;
3012 }
3013
3014 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3015 {
3016         __be32 *p;
3017         int status = 0;
3018
3019         *res = 1024;
3020         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3021                 return -EIO;
3022         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3023                 uint64_t maxwrite;
3024                 READ_BUF(8);
3025                 READ64(maxwrite);
3026                 if (maxwrite > 0x7FFFFFFF)
3027                         maxwrite = 0x7FFFFFFF;
3028                 *res = (uint32_t)maxwrite;
3029                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3030         }
3031         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3032         return status;
3033 }
3034
3035 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3036 {
3037         uint32_t tmp;
3038         __be32 *p;
3039         int ret = 0;
3040
3041         *mode = 0;
3042         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3043                 return -EIO;
3044         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3045                 READ_BUF(4);
3046                 READ32(tmp);
3047                 *mode = tmp & ~S_IFMT;
3048                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3049                 ret = NFS_ATTR_FATTR_MODE;
3050         }
3051         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3052         return ret;
3053 }
3054
3055 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3056 {
3057         __be32 *p;
3058         int ret = 0;
3059
3060         *nlink = 1;
3061         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3062                 return -EIO;
3063         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3064                 READ_BUF(4);
3065                 READ32(*nlink);
3066                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3067                 ret = NFS_ATTR_FATTR_NLINK;
3068         }
3069         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3070         return ret;
3071 }
3072
3073 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3074 {
3075         uint32_t len;
3076         __be32 *p;
3077         int ret = 0;
3078
3079         *uid = -2;
3080         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3081                 return -EIO;
3082         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3083                 READ_BUF(4);
3084                 READ32(len);
3085                 READ_BUF(len);
3086                 if (len < XDR_MAX_NETOBJ) {
3087                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3088                                 ret = NFS_ATTR_FATTR_OWNER;
3089                         else
3090                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3091                                                 __func__);
3092                 } else
3093                         dprintk("%s: name too long (%u)!\n",
3094                                         __func__, len);
3095                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3096         }
3097         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3098         return ret;
3099 }
3100
3101 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3102 {
3103         uint32_t len;
3104         __be32 *p;
3105         int ret = 0;
3106
3107         *gid = -2;
3108         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3109                 return -EIO;
3110         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3111                 READ_BUF(4);
3112                 READ32(len);
3113                 READ_BUF(len);
3114                 if (len < XDR_MAX_NETOBJ) {
3115                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3116                                 ret = NFS_ATTR_FATTR_GROUP;
3117                         else
3118                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3119                                                 __func__);
3120                 } else
3121                         dprintk("%s: name too long (%u)!\n",
3122                                         __func__, len);
3123                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3124         }
3125         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3126         return ret;
3127 }
3128
3129 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3130 {
3131         uint32_t major = 0, minor = 0;
3132         __be32 *p;
3133         int ret = 0;
3134
3135         *rdev = MKDEV(0,0);
3136         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3137                 return -EIO;
3138         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3139                 dev_t tmp;
3140
3141                 READ_BUF(8);
3142                 READ32(major);
3143                 READ32(minor);
3144                 tmp = MKDEV(major, minor);
3145                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3146                         *rdev = tmp;
3147                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3148                 ret = NFS_ATTR_FATTR_RDEV;
3149         }
3150         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3151         return ret;
3152 }
3153
3154 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3155 {
3156         __be32 *p;
3157         int status = 0;
3158
3159         *res = 0;
3160         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3161                 return -EIO;
3162         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3163                 READ_BUF(8);
3164                 READ64(*res);
3165                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3166         }
3167         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3168         return status;
3169 }
3170
3171 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3172 {
3173         __be32 *p;
3174         int status = 0;
3175
3176         *res = 0;
3177         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3178                 return -EIO;
3179         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3180                 READ_BUF(8);
3181                 READ64(*res);
3182                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3183         }
3184         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3185         return status;
3186 }
3187
3188 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3189 {
3190         __be32 *p;
3191         int status = 0;
3192
3193         *res = 0;
3194         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3195                 return -EIO;
3196         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3197                 READ_BUF(8);
3198                 READ64(*res);
3199                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3200         }
3201         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3202         return status;
3203 }
3204
3205 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3206 {
3207         __be32 *p;
3208         int ret = 0;
3209
3210         *used = 0;
3211         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3212                 return -EIO;
3213         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3214                 READ_BUF(8);
3215                 READ64(*used);
3216                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3217                 ret = NFS_ATTR_FATTR_SPACE_USED;
3218         }
3219         dprintk("%s: space used=%Lu\n", __func__,
3220                         (unsigned long long)*used);
3221         return ret;
3222 }
3223
3224 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3225 {
3226         __be32 *p;
3227         uint64_t sec;
3228         uint32_t nsec;
3229
3230         READ_BUF(12);
3231         READ64(sec);
3232         READ32(nsec);
3233         time->tv_sec = (time_t)sec;
3234         time->tv_nsec = (long)nsec;
3235         return 0;
3236 }
3237
3238 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3239 {
3240         int status = 0;
3241
3242         time->tv_sec = 0;
3243         time->tv_nsec = 0;
3244         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3245                 return -EIO;
3246         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3247                 status = decode_attr_time(xdr, time);
3248                 if (status == 0)
3249                         status = NFS_ATTR_FATTR_ATIME;
3250                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3251         }
3252         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3253         return status;
3254 }
3255
3256 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3257 {
3258         int status = 0;
3259
3260         time->tv_sec = 0;
3261         time->tv_nsec = 0;
3262         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3263                 return -EIO;
3264         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3265                 status = decode_attr_time(xdr, time);
3266                 if (status == 0)
3267                         status = NFS_ATTR_FATTR_CTIME;
3268                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3269         }
3270         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3271         return status;
3272 }
3273
3274 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3275 {
3276         int status = 0;
3277
3278         time->tv_sec = 0;
3279         time->tv_nsec = 0;
3280         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3281                 return -EIO;
3282         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3283                 status = decode_attr_time(xdr, time);
3284                 if (status == 0)
3285                         status = NFS_ATTR_FATTR_MTIME;
3286                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3287         }
3288         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3289         return status;
3290 }
3291
3292 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3293 {
3294         unsigned int attrwords = XDR_QUADLEN(attrlen);
3295         unsigned int nwords = xdr->p - savep;
3296
3297         if (unlikely(attrwords != nwords)) {
3298                 dprintk("%s: server returned incorrect attribute length: "
3299                         "%u %c %u\n",
3300                                 __func__,
3301                                 attrwords << 2,
3302                                 (attrwords < nwords) ? '<' : '>',
3303                                 nwords << 2);
3304                 return -EIO;
3305         }
3306         return 0;
3307 }
3308
3309 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3310 {
3311         __be32 *p;
3312
3313         READ_BUF(20);
3314         READ32(cinfo->atomic);
3315         READ64(cinfo->before);
3316         READ64(cinfo->after);
3317         return 0;
3318 }
3319
3320 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3321 {
3322         __be32 *p;
3323         uint32_t supp, acc;
3324         int status;
3325
3326         status = decode_op_hdr(xdr, OP_ACCESS);
3327         if (status)
3328                 return status;
3329         READ_BUF(8);
3330         READ32(supp);
3331         READ32(acc);
3332         access->supported = supp;
3333         access->access = acc;
3334         return 0;
3335 }
3336
3337 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3338 {
3339         __be32 *p;
3340         int status;
3341
3342         status = decode_op_hdr(xdr, OP_CLOSE);
3343         if (status != -EIO)
3344                 nfs_increment_open_seqid(status, res->seqid);
3345         if (status)
3346                 return status;
3347         READ_BUF(NFS4_STATEID_SIZE);
3348         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3349         return 0;
3350 }
3351
3352 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3353 {
3354         __be32 *p;
3355         int status;
3356
3357         status = decode_op_hdr(xdr, OP_COMMIT);
3358         if (status)
3359                 return status;
3360         READ_BUF(8);
3361         COPYMEM(res->verf->verifier, 8);
3362         return 0;
3363 }
3364
3365 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3366 {
3367         __be32 *p;
3368         uint32_t bmlen;
3369         int status;
3370
3371         status = decode_op_hdr(xdr, OP_CREATE);
3372         if (status)
3373                 return status;
3374         if ((status = decode_change_info(xdr, cinfo)))
3375                 return status;
3376         READ_BUF(4);
3377         READ32(bmlen);
3378         READ_BUF(bmlen << 2);
3379         return 0;
3380 }
3381
3382 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3383 {
3384         __be32 *savep;
3385         uint32_t attrlen, bitmap[2] = {0};
3386         int status;
3387
3388         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3389                 goto xdr_error;
3390         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3391                 goto xdr_error;
3392         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3393                 goto xdr_error;
3394         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3395                 goto xdr_error;
3396         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3397                 goto xdr_error;
3398         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3399                 goto xdr_error;
3400         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3401                 goto xdr_error;
3402         status = verify_attr_len(xdr, savep, attrlen);
3403 xdr_error:
3404         dprintk("%s: xdr returned %d!\n", __func__, -status);
3405         return status;
3406 }
3407
3408 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3409 {
3410         __be32 *savep;
3411         uint32_t attrlen, bitmap[2] = {0};
3412         int status;
3413
3414         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3415                 goto xdr_error;
3416         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3417                 goto xdr_error;
3418         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3419                 goto xdr_error;
3420
3421         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3422                 goto xdr_error;
3423         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3424                 goto xdr_error;
3425         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3426                 goto xdr_error;
3427         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3428                 goto xdr_error;
3429         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3430                 goto xdr_error;
3431         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 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_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3441 {
3442         __be32 *savep;
3443         uint32_t attrlen, bitmap[2] = {0};
3444         int status;
3445
3446         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3447                 goto xdr_error;
3448         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3449                 goto xdr_error;
3450         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3451                 goto xdr_error;
3452
3453         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3454                 goto xdr_error;
3455         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3456                 goto xdr_error;
3457
3458         status = verify_attr_len(xdr, savep, attrlen);
3459 xdr_error:
3460         dprintk("%s: xdr returned %d!\n", __func__, -status);
3461         return status;
3462 }
3463
3464 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3465 {
3466         __be32 *savep;
3467         uint32_t attrlen,
3468                  bitmap[2] = {0},
3469                  type;
3470         int status;
3471         umode_t fmode = 0;
3472         uint64_t fileid;
3473
3474         status = decode_op_hdr(xdr, OP_GETATTR);
3475         if (status < 0)
3476                 goto xdr_error;
3477
3478         status = decode_attr_bitmap(xdr, bitmap);
3479         if (status < 0)
3480                 goto xdr_error;
3481
3482         status = decode_attr_length(xdr, &attrlen, &savep);
3483         if (status < 0)
3484                 goto xdr_error;
3485
3486
3487         status = decode_attr_type(xdr, bitmap, &type);
3488         if (status < 0)
3489                 goto xdr_error;
3490         fattr->mode = 0;
3491         if (status != 0) {
3492                 fattr->mode |= nfs_type2fmt[type];
3493                 fattr->valid |= status;
3494         }
3495
3496         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3497         if (status < 0)
3498                 goto xdr_error;
3499         fattr->valid |= status;
3500
3501         status = decode_attr_size(xdr, bitmap, &fattr->size);
3502         if (status < 0)
3503                 goto xdr_error;
3504         fattr->valid |= status;
3505
3506         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3507         if (status < 0)
3508                 goto xdr_error;
3509         fattr->valid |= status;
3510
3511         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3512         if (status < 0)
3513                 goto xdr_error;
3514         fattr->valid |= status;
3515
3516         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3517                                                 struct nfs4_fs_locations,
3518                                                 fattr));
3519         if (status < 0)
3520                 goto xdr_error;
3521         fattr->valid |= status;
3522
3523         status = decode_attr_mode(xdr, bitmap, &fmode);
3524         if (status < 0)
3525                 goto xdr_error;
3526         if (status != 0) {
3527                 fattr->mode |= fmode;
3528                 fattr->valid |= status;
3529         }
3530
3531         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3532         if (status < 0)
3533                 goto xdr_error;
3534         fattr->valid |= status;
3535
3536         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3537         if (status < 0)
3538                 goto xdr_error;
3539         fattr->valid |= status;
3540
3541         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3542         if (status < 0)
3543                 goto xdr_error;
3544         fattr->valid |= status;
3545
3546         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3547         if (status < 0)
3548                 goto xdr_error;
3549         fattr->valid |= status;
3550
3551         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3552         if (status < 0)
3553                 goto xdr_error;
3554         fattr->valid |= status;
3555
3556         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3557         if (status < 0)
3558                 goto xdr_error;
3559         fattr->valid |= status;
3560
3561         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3562         if (status < 0)
3563                 goto xdr_error;
3564         fattr->valid |= status;
3565
3566         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3567         if (status < 0)
3568                 goto xdr_error;
3569         fattr->valid |= status;
3570
3571         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3572         if (status < 0)
3573                 goto xdr_error;
3574         if (status != 0 && !(fattr->valid & status)) {
3575                 fattr->fileid = fileid;
3576                 fattr->valid |= status;
3577         }
3578
3579         status = verify_attr_len(xdr, savep, attrlen);
3580 xdr_error:
3581         dprintk("%s: xdr returned %d\n", __func__, -status);
3582         return status;
3583 }
3584
3585
3586 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3587 {
3588         __be32 *savep;
3589         uint32_t attrlen, bitmap[2];
3590         int status;
3591
3592         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3593                 goto xdr_error;
3594         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3595                 goto xdr_error;
3596         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3597                 goto xdr_error;
3598
3599         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3600
3601         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3602                 goto xdr_error;
3603         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3604                 goto xdr_error;
3605         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3606                 goto xdr_error;
3607         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3608         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3609                 goto xdr_error;
3610         fsinfo->wtpref = fsinfo->wtmax;
3611
3612         status = verify_attr_len(xdr, savep, attrlen);
3613 xdr_error:
3614         dprintk("%s: xdr returned %d!\n", __func__, -status);
3615         return status;
3616 }
3617
3618 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3619 {
3620         __be32 *p;
3621         uint32_t len;
3622         int status;
3623
3624         /* Zero handle first to allow comparisons */
3625         memset(fh, 0, sizeof(*fh));
3626
3627         status = decode_op_hdr(xdr, OP_GETFH);
3628         if (status)
3629                 return status;
3630
3631         READ_BUF(4);
3632         READ32(len);
3633         if (len > NFS4_FHSIZE)
3634                 return -EIO;
3635         fh->size = len;
3636         READ_BUF(len);
3637         COPYMEM(fh->data, len);
3638         return 0;
3639 }
3640
3641 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3642 {
3643         int status;
3644
3645         status = decode_op_hdr(xdr, OP_LINK);
3646         if (status)
3647                 return status;
3648         return decode_change_info(xdr, cinfo);
3649 }
3650
3651 /*
3652  * We create the owner, so we know a proper owner.id length is 4.
3653  */
3654 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3655 {
3656         uint64_t offset, length, clientid;
3657         __be32 *p;
3658         uint32_t namelen, type;
3659
3660         READ_BUF(32);
3661         READ64(offset);
3662         READ64(length);
3663         READ32(type);
3664         if (fl != NULL) {
3665                 fl->fl_start = (loff_t)offset;
3666                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3667                 if (length == ~(uint64_t)0)
3668                         fl->fl_end = OFFSET_MAX;
3669                 fl->fl_type = F_WRLCK;
3670                 if (type & 1)
3671                         fl->fl_type = F_RDLCK;
3672                 fl->fl_pid = 0;
3673         }
3674         READ64(clientid);
3675         READ32(namelen);
3676         READ_BUF(namelen);
3677         return -NFS4ERR_DENIED;
3678 }
3679
3680 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3681 {
3682         __be32 *p;
3683         int status;
3684
3685         status = decode_op_hdr(xdr, OP_LOCK);
3686         if (status == -EIO)
3687                 goto out;
3688         if (status == 0) {
3689                 READ_BUF(NFS4_STATEID_SIZE);
3690                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3691         } else if (status == -NFS4ERR_DENIED)
3692                 status = decode_lock_denied(xdr, NULL);
3693         if (res->open_seqid != NULL)
3694                 nfs_increment_open_seqid(status, res->open_seqid);
3695         nfs_increment_lock_seqid(status, res->lock_seqid);
3696 out:
3697         return status;
3698 }
3699
3700 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3701 {
3702         int status;
3703         status = decode_op_hdr(xdr, OP_LOCKT);
3704         if (status == -NFS4ERR_DENIED)
3705                 return decode_lock_denied(xdr, res->denied);
3706         return status;
3707 }
3708
3709 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3710 {
3711         __be32 *p;
3712         int status;
3713
3714         status = decode_op_hdr(xdr, OP_LOCKU);
3715         if (status != -EIO)
3716                 nfs_increment_lock_seqid(status, res->seqid);
3717         if (status == 0) {
3718                 READ_BUF(NFS4_STATEID_SIZE);
3719                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3720         }
3721         return status;
3722 }
3723
3724 static int decode_lookup(struct xdr_stream *xdr)
3725 {
3726         return decode_op_hdr(xdr, OP_LOOKUP);
3727 }
3728
3729 /* This is too sick! */
3730 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3731 {
3732         __be32 *p;
3733         uint32_t limit_type, nblocks, blocksize;
3734
3735         READ_BUF(12);
3736         READ32(limit_type);
3737         switch (limit_type) {
3738         case 1:
3739                 READ64(*maxsize);
3740                 break;
3741         case 2:
3742                 READ32(nblocks);
3743                 READ32(blocksize);
3744                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3745         }
3746         return 0;
3747 }
3748
3749 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3750 {
3751         __be32 *p;
3752         uint32_t delegation_type;
3753
3754         READ_BUF(4);
3755         READ32(delegation_type);
3756         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3757                 res->delegation_type = 0;
3758                 return 0;
3759         }
3760         READ_BUF(NFS4_STATEID_SIZE+4);
3761         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3762         READ32(res->do_recall);
3763
3764         switch (delegation_type) {
3765         case NFS4_OPEN_DELEGATE_READ:
3766                 res->delegation_type = FMODE_READ;
3767                 break;
3768         case NFS4_OPEN_DELEGATE_WRITE:
3769                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3770                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3771                                 return -EIO;
3772         }
3773         return decode_ace(xdr, NULL, res->server->nfs_client);
3774 }
3775
3776 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3777 {
3778         __be32 *p;
3779         uint32_t savewords, bmlen, i;
3780         int status;
3781
3782         status = decode_op_hdr(xdr, OP_OPEN);
3783         if (status != -EIO)
3784                 nfs_increment_open_seqid(status, res->seqid);
3785         if (status)
3786                 return status;
3787         READ_BUF(NFS4_STATEID_SIZE);
3788         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3789
3790         decode_change_info(xdr, &res->cinfo);
3791
3792         READ_BUF(8);
3793         READ32(res->rflags);
3794         READ32(bmlen);
3795         if (bmlen > 10)
3796                 goto xdr_error;
3797
3798         READ_BUF(bmlen << 2);
3799         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3800         for (i = 0; i < savewords; ++i)
3801                 READ32(res->attrset[i]);
3802         for (; i < NFS4_BITMAP_SIZE; i++)
3803                 res->attrset[i] = 0;
3804
3805         return decode_delegation(xdr, res);
3806 xdr_error:
3807         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3808         return -EIO;
3809 }
3810
3811 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3812 {
3813         __be32 *p;
3814         int status;
3815
3816         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3817         if (status != -EIO)
3818                 nfs_increment_open_seqid(status, res->seqid);
3819         if (status)
3820                 return status;
3821         READ_BUF(NFS4_STATEID_SIZE);
3822         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3823         return 0;
3824 }
3825
3826 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3827 {
3828         __be32 *p;
3829         int status;
3830
3831         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3832         if (status != -EIO)
3833                 nfs_increment_open_seqid(status, res->seqid);
3834         if (status)
3835                 return status;
3836         READ_BUF(NFS4_STATEID_SIZE);
3837         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3838         return 0;
3839 }
3840
3841 static int decode_putfh(struct xdr_stream *xdr)
3842 {
3843         return decode_op_hdr(xdr, OP_PUTFH);
3844 }
3845
3846 static int decode_putrootfh(struct xdr_stream *xdr)
3847 {
3848         return decode_op_hdr(xdr, OP_PUTROOTFH);
3849 }
3850
3851 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3852 {
3853         struct kvec *iov = req->rq_rcv_buf.head;
3854         __be32 *p;
3855         uint32_t count, eof, recvd, hdrlen;
3856         int status;
3857
3858         status = decode_op_hdr(xdr, OP_READ);
3859         if (status)
3860                 return status;
3861         READ_BUF(8);
3862         READ32(eof);
3863         READ32(count);
3864         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3865         recvd = req->rq_rcv_buf.len - hdrlen;
3866         if (count > recvd) {
3867                 dprintk("NFS: server cheating in read reply: "
3868                                 "count %u > recvd %u\n", count, recvd);
3869                 count = recvd;
3870                 eof = 0;
3871         }
3872         xdr_read_pages(xdr, count);
3873         res->eof = eof;
3874         res->count = count;
3875         return 0;
3876 }
3877
3878 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3879 {
3880         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3881         struct page     *page = *rcvbuf->pages;
3882         struct kvec     *iov = rcvbuf->head;
3883         size_t          hdrlen;
3884         u32             recvd, pglen = rcvbuf->page_len;
3885         __be32          *end, *entry, *p, *kaddr;
3886         unsigned int    nr = 0;
3887         int             status;
3888
3889         status = decode_op_hdr(xdr, OP_READDIR);
3890         if (status)
3891                 return status;
3892         READ_BUF(8);
3893         COPYMEM(readdir->verifier.data, 8);
3894         dprintk("%s: verifier = %08x:%08x\n",
3895                         __func__,
3896                         ((u32 *)readdir->verifier.data)[0],
3897                         ((u32 *)readdir->verifier.data)[1]);
3898
3899
3900         hdrlen = (char *) p - (char *) iov->iov_base;
3901         recvd = rcvbuf->len - hdrlen;
3902         if (pglen > recvd)
3903                 pglen = recvd;
3904         xdr_read_pages(xdr, pglen);
3905
3906         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3907         kaddr = p = kmap_atomic(page, KM_USER0);
3908         end = p + ((pglen + readdir->pgbase) >> 2);
3909         entry = p;
3910
3911         /* Make sure the packet actually has a value_follows and EOF entry */
3912         if ((entry + 1) > end)
3913                 goto short_pkt;
3914
3915         for (; *p++; nr++) {
3916                 u32 len, attrlen, xlen;
3917                 if (end - p < 3)
3918                         goto short_pkt;
3919                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3920                 p += 2;                 /* cookie */
3921                 len = ntohl(*p++);      /* filename length */
3922                 if (len > NFS4_MAXNAMLEN) {
3923                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3924                                         len);
3925                         goto err_unmap;
3926                 }
3927                 xlen = XDR_QUADLEN(len);
3928                 if (end - p < xlen + 1)
3929                         goto short_pkt;
3930                 dprintk("filename = %*s\n", len, (char *)p);
3931                 p += xlen;
3932                 len = ntohl(*p++);      /* bitmap length */
3933                 if (end - p < len + 1)
3934                         goto short_pkt;
3935                 p += len;
3936                 attrlen = XDR_QUADLEN(ntohl(*p++));
3937                 if (end - p < attrlen + 2)
3938                         goto short_pkt;
3939                 p += attrlen;           /* attributes */
3940                 entry = p;
3941         }
3942         /*
3943          * Apparently some server sends responses that are a valid size, but
3944          * contain no entries, and have value_follows==0 and EOF==0. For
3945          * those, just set the EOF marker.
3946          */
3947         if (!nr && entry[1] == 0) {
3948                 dprintk("NFS: readdir reply truncated!\n");
3949                 entry[1] = 1;
3950         }
3951 out:
3952         kunmap_atomic(kaddr, KM_USER0);
3953         return 0;
3954 short_pkt:
3955         /*
3956          * When we get a short packet there are 2 possibilities. We can
3957          * return an error, or fix up the response to look like a valid
3958          * response and return what we have so far. If there are no
3959          * entries and the packet was short, then return -EIO. If there
3960          * are valid entries in the response, return them and pretend that
3961          * the call was successful, but incomplete. The caller can retry the
3962          * readdir starting at the last cookie.
3963          */
3964         dprintk("%s: short packet at entry %d\n", __func__, nr);
3965         entry[0] = entry[1] = 0;
3966         if (nr)
3967                 goto out;
3968 err_unmap:
3969         kunmap_atomic(kaddr, KM_USER0);
3970         return -errno_NFSERR_IO;
3971 }
3972
3973 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3974 {
3975         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3976         struct kvec *iov = rcvbuf->head;
3977         size_t hdrlen;
3978         u32 len, recvd;
3979         __be32 *p;
3980         char *kaddr;
3981         int status;
3982
3983         status = decode_op_hdr(xdr, OP_READLINK);
3984         if (status)
3985                 return status;
3986
3987         /* Convert length of symlink */
3988         READ_BUF(4);
3989         READ32(len);
3990         if (len >= rcvbuf->page_len || len <= 0) {
3991                 dprintk("nfs: server returned giant symlink!\n");
3992                 return -ENAMETOOLONG;
3993         }
3994         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3995         recvd = req->rq_rcv_buf.len - hdrlen;
3996         if (recvd < len) {
3997                 dprintk("NFS: server cheating in readlink reply: "
3998                                 "count %u > recvd %u\n", len, recvd);
3999                 return -EIO;
4000         }
4001         xdr_read_pages(xdr, len);
4002         /*
4003          * The XDR encode routine has set things up so that
4004          * the link text will be copied directly into the
4005          * buffer.  We just have to do overflow-checking,
4006          * and and null-terminate the text (the VFS expects
4007          * null-termination).
4008          */
4009         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4010         kaddr[len+rcvbuf->page_base] = '\0';
4011         kunmap_atomic(kaddr, KM_USER0);
4012         return 0;
4013 }
4014
4015 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4016 {
4017         int status;
4018
4019         status = decode_op_hdr(xdr, OP_REMOVE);
4020         if (status)
4021                 goto out;
4022         status = decode_change_info(xdr, cinfo);
4023 out:
4024         return status;
4025 }
4026
4027 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4028               struct nfs4_change_info *new_cinfo)
4029 {
4030         int status;
4031
4032         status = decode_op_hdr(xdr, OP_RENAME);
4033         if (status)
4034                 goto out;
4035         if ((status = decode_change_info(xdr, old_cinfo)))
4036                 goto out;
4037         status = decode_change_info(xdr, new_cinfo);
4038 out:
4039         return status;
4040 }
4041
4042 static int decode_renew(struct xdr_stream *xdr)
4043 {
4044         return decode_op_hdr(xdr, OP_RENEW);
4045 }
4046
4047 static int
4048 decode_restorefh(struct xdr_stream *xdr)
4049 {
4050         return decode_op_hdr(xdr, OP_RESTOREFH);
4051 }
4052
4053 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4054                 size_t *acl_len)
4055 {
4056         __be32 *savep;
4057         uint32_t attrlen,
4058                  bitmap[2] = {0};
4059         struct kvec *iov = req->rq_rcv_buf.head;
4060         int status;
4061
4062         *acl_len = 0;
4063         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4064                 goto out;
4065         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4066                 goto out;
4067         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4068                 goto out;
4069
4070         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4071                 return -EIO;
4072         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4073                 size_t hdrlen;
4074                 u32 recvd;
4075
4076                 /* We ignore &savep and don't do consistency checks on
4077                  * the attr length.  Let userspace figure it out.... */
4078                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4079                 recvd = req->rq_rcv_buf.len - hdrlen;
4080                 if (attrlen > recvd) {
4081                         dprintk("NFS: server cheating in getattr"
4082                                         " acl reply: attrlen %u > recvd %u\n",
4083                                         attrlen, recvd);
4084                         return -EINVAL;
4085                 }
4086                 xdr_read_pages(xdr, attrlen);
4087                 *acl_len = attrlen;
4088         } else
4089                 status = -EOPNOTSUPP;
4090
4091 out:
4092         return status;
4093 }
4094
4095 static int
4096 decode_savefh(struct xdr_stream *xdr)
4097 {
4098         return decode_op_hdr(xdr, OP_SAVEFH);
4099 }
4100
4101 static int decode_setattr(struct xdr_stream *xdr)
4102 {
4103         __be32 *p;
4104         uint32_t bmlen;
4105         int status;
4106
4107         status = decode_op_hdr(xdr, OP_SETATTR);
4108         if (status)
4109                 return status;
4110         READ_BUF(4);
4111         READ32(bmlen);
4112         READ_BUF(bmlen << 2);
4113         return 0;
4114 }
4115
4116 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4117 {
4118         __be32 *p;
4119         uint32_t opnum;
4120         int32_t nfserr;
4121
4122         READ_BUF(8);
4123         READ32(opnum);
4124         if (opnum != OP_SETCLIENTID) {
4125                 dprintk("nfs: decode_setclientid: Server returned operation"
4126                         " %d\n", opnum);
4127                 return -EIO;
4128         }
4129         READ32(nfserr);
4130         if (nfserr == NFS_OK) {
4131                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4132                 READ64(clp->cl_clientid);
4133                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4134         } else if (nfserr == NFSERR_CLID_INUSE) {
4135                 uint32_t len;
4136
4137                 /* skip netid string */
4138                 READ_BUF(4);
4139                 READ32(len);
4140                 READ_BUF(len);
4141
4142                 /* skip uaddr string */
4143                 READ_BUF(4);
4144                 READ32(len);
4145                 READ_BUF(len);
4146                 return -NFSERR_CLID_INUSE;
4147         } else
4148                 return nfs4_stat_to_errno(nfserr);
4149
4150         return 0;
4151 }
4152
4153 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4154 {
4155         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4156 }
4157
4158 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4159 {
4160         __be32 *p;
4161         int status;
4162
4163         status = decode_op_hdr(xdr, OP_WRITE);
4164         if (status)
4165                 return status;
4166
4167         READ_BUF(16);
4168         READ32(res->count);
4169         READ32(res->verf->committed);
4170         COPYMEM(res->verf->verifier, 8);
4171         return 0;
4172 }
4173
4174 static int decode_delegreturn(struct xdr_stream *xdr)
4175 {
4176         return decode_op_hdr(xdr, OP_DELEGRETURN);
4177 }
4178
4179 #if defined(CONFIG_NFS_V4_1)
4180 static int decode_exchange_id(struct xdr_stream *xdr,
4181                               struct nfs41_exchange_id_res *res)
4182 {
4183         __be32 *p;
4184         uint32_t dummy;
4185         int status;
4186         struct nfs_client *clp = res->client;
4187
4188         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4189         if (status)
4190                 return status;
4191
4192         READ_BUF(8);
4193         READ64(clp->cl_ex_clid);
4194         READ_BUF(12);
4195         READ32(clp->cl_seqid);
4196         READ32(clp->cl_exchange_flags);
4197
4198         /* We ask for SP4_NONE */
4199         READ32(dummy);
4200         if (dummy != SP4_NONE)
4201                 return -EIO;
4202
4203         /* Throw away minor_id */
4204         READ_BUF(8);
4205
4206         /* Throw away Major id */
4207         READ_BUF(4);
4208         READ32(dummy);
4209         READ_BUF(dummy);
4210
4211         /* Throw away server_scope */
4212         READ_BUF(4);
4213         READ32(dummy);
4214         READ_BUF(dummy);
4215
4216         /* Throw away Implementation id array */
4217         READ_BUF(4);
4218         READ32(dummy);
4219         READ_BUF(dummy);
4220
4221         return 0;
4222 }
4223
4224 static int decode_chan_attrs(struct xdr_stream *xdr,
4225                              struct nfs4_channel_attrs *attrs)
4226 {
4227         __be32 *p;
4228         u32 nr_attrs;
4229
4230         READ_BUF(28);
4231         READ32(attrs->headerpadsz);
4232         READ32(attrs->max_rqst_sz);
4233         READ32(attrs->max_resp_sz);
4234         READ32(attrs->max_resp_sz_cached);
4235         READ32(attrs->max_ops);
4236         READ32(attrs->max_reqs);
4237         READ32(nr_attrs);
4238         if (unlikely(nr_attrs > 1)) {
4239                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4240                         __func__, nr_attrs);
4241                 return -EINVAL;
4242         }
4243         if (nr_attrs == 1)
4244                 READ_BUF(4); /* skip rdma_attrs */
4245         return 0;
4246 }
4247
4248 static int decode_create_session(struct xdr_stream *xdr,
4249                                  struct nfs41_create_session_res *res)
4250 {
4251         __be32 *p;
4252         int status;
4253         struct nfs_client *clp = res->client;
4254         struct nfs4_session *session = clp->cl_session;
4255
4256         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4257
4258         if (status)
4259                 return status;
4260
4261         /* sessionid */
4262         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4263         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4264
4265         /* seqid, flags */
4266         READ_BUF(8);
4267         READ32(clp->cl_seqid);
4268         READ32(session->flags);
4269
4270         /* Channel attributes */
4271         status = decode_chan_attrs(xdr, &session->fc_attrs);
4272         if (!status)
4273                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4274         return status;
4275 }
4276
4277 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4278 {
4279         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4280 }
4281 #endif /* CONFIG_NFS_V4_1 */
4282
4283 static int decode_sequence(struct xdr_stream *xdr,
4284                            struct nfs4_sequence_res *res,
4285                            struct rpc_rqst *rqstp)
4286 {
4287 #if defined(CONFIG_NFS_V4_1)
4288         struct nfs4_slot *slot;
4289         struct nfs4_sessionid id;
4290         u32 dummy;
4291         int status;
4292         __be32 *p;
4293
4294         if (!res->sr_session)
4295                 return 0;
4296
4297         status = decode_op_hdr(xdr, OP_SEQUENCE);
4298         if (status)
4299                 goto out_err;
4300
4301         /*
4302          * If the server returns different values for sessionID, slotID or
4303          * sequence number, the server is looney tunes.
4304          */
4305         status = -ESERVERFAULT;
4306
4307         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4308         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4309         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4310         if (memcmp(id.data, res->sr_session->sess_id.data,
4311                    NFS4_MAX_SESSIONID_LEN)) {
4312                 dprintk("%s Invalid session id\n", __func__);
4313                 goto out_err;
4314         }
4315         /* seqid */
4316         READ32(dummy);
4317         if (dummy != slot->seq_nr) {
4318                 dprintk("%s Invalid sequence number\n", __func__);
4319                 goto out_err;
4320         }
4321         /* slot id */
4322         READ32(dummy);
4323         if (dummy != res->sr_slotid) {
4324                 dprintk("%s Invalid slot id\n", __func__);
4325                 goto out_err;
4326         }
4327         /* highest slot id - currently not processed */
4328         READ32(dummy);
4329         /* target highest slot id - currently not processed */
4330         READ32(dummy);
4331         /* result flags - currently not processed */
4332         READ32(dummy);
4333         status = 0;
4334 out_err:
4335         res->sr_status = status;
4336         return status;
4337 #else  /* CONFIG_NFS_V4_1 */
4338         return 0;
4339 #endif /* CONFIG_NFS_V4_1 */
4340 }
4341
4342 /*
4343  * END OF "GENERIC" DECODE ROUTINES.
4344  */
4345
4346 /*
4347  * Decode OPEN_DOWNGRADE response
4348  */
4349 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4350 {
4351         struct xdr_stream xdr;
4352         struct compound_hdr hdr;
4353         int status;
4354
4355         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4356         status = decode_compound_hdr(&xdr, &hdr);
4357         if (status)
4358                 goto out;
4359         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4360         if (status)
4361                 goto out;
4362         status = decode_putfh(&xdr);
4363         if (status)
4364                 goto out;
4365         status = decode_open_downgrade(&xdr, res);
4366         if (status != 0)
4367                 goto out;
4368         decode_getfattr(&xdr, res->fattr, res->server);
4369 out:
4370         return status;
4371 }
4372
4373 /*
4374  * Decode ACCESS response
4375  */
4376 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4377 {
4378         struct xdr_stream xdr;
4379         struct compound_hdr hdr;
4380         int status;
4381
4382         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4383         status = decode_compound_hdr(&xdr, &hdr);
4384         if (status)
4385                 goto out;
4386         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4387         if (status)
4388                 goto out;
4389         status = decode_putfh(&xdr);
4390         if (status != 0)
4391                 goto out;
4392         status = decode_access(&xdr, res);
4393         if (status != 0)
4394                 goto out;
4395         decode_getfattr(&xdr, res->fattr, res->server);
4396 out:
4397         return status;
4398 }
4399
4400 /*
4401  * Decode LOOKUP response
4402  */
4403 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4404 {
4405         struct xdr_stream xdr;
4406         struct compound_hdr hdr;
4407         int status;
4408
4409         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4410         status = decode_compound_hdr(&xdr, &hdr);
4411         if (status)
4412                 goto out;
4413         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4414         if (status)
4415                 goto out;
4416         if ((status = decode_putfh(&xdr)) != 0)
4417                 goto out;
4418         if ((status = decode_lookup(&xdr)) != 0)
4419                 goto out;
4420         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4421                 goto out;
4422         status = decode_getfattr(&xdr, res->fattr, res->server);
4423 out:
4424         return status;
4425 }
4426
4427 /*
4428  * Decode LOOKUP_ROOT response
4429  */
4430 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *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_putrootfh(&xdr)) != 0)
4444                 goto out;
4445         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4446                 status = decode_getfattr(&xdr, res->fattr, res->server);
4447 out:
4448         return status;
4449 }
4450
4451 /*
4452  * Decode REMOVE response
4453  */
4454 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4455 {
4456         struct xdr_stream xdr;
4457         struct compound_hdr hdr;
4458         int status;
4459
4460         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4461         status = decode_compound_hdr(&xdr, &hdr);
4462         if (status)
4463                 goto out;
4464         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4465         if (status)
4466                 goto out;
4467         if ((status = decode_putfh(&xdr)) != 0)
4468                 goto out;
4469         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4470                 goto out;
4471         decode_getfattr(&xdr, &res->dir_attr, res->server);
4472 out:
4473         return status;
4474 }
4475
4476 /*
4477  * Decode RENAME response
4478  */
4479 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4480 {
4481         struct xdr_stream xdr;
4482         struct compound_hdr hdr;
4483         int status;
4484
4485         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4486         status = decode_compound_hdr(&xdr, &hdr);
4487         if (status)
4488                 goto out;
4489         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4490         if (status)
4491                 goto out;
4492         if ((status = decode_putfh(&xdr)) != 0)
4493                 goto out;
4494         if ((status = decode_savefh(&xdr)) != 0)
4495                 goto out;
4496         if ((status = decode_putfh(&xdr)) != 0)
4497                 goto out;
4498         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4499                 goto out;
4500         /* Current FH is target directory */
4501         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4502                 goto out;
4503         if ((status = decode_restorefh(&xdr)) != 0)
4504                 goto out;
4505         decode_getfattr(&xdr, res->old_fattr, res->server);
4506 out:
4507         return status;
4508 }
4509
4510 /*
4511  * Decode LINK response
4512  */
4513 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4514 {
4515         struct xdr_stream xdr;
4516         struct compound_hdr hdr;
4517         int status;
4518
4519         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4520         status = decode_compound_hdr(&xdr, &hdr);
4521         if (status)
4522                 goto out;
4523         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4524         if (status)
4525                 goto out;
4526         if ((status = decode_putfh(&xdr)) != 0)
4527                 goto out;
4528         if ((status = decode_savefh(&xdr)) != 0)
4529                 goto out;
4530         if ((status = decode_putfh(&xdr)) != 0)
4531                 goto out;
4532         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4533                 goto out;
4534         /*
4535          * Note order: OP_LINK leaves the directory as the current
4536          *             filehandle.
4537          */
4538         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4539                 goto out;
4540         if ((status = decode_restorefh(&xdr)) != 0)
4541                 goto out;
4542         decode_getfattr(&xdr, res->fattr, res->server);
4543 out:
4544         return status;
4545 }
4546
4547 /*
4548  * Decode CREATE response
4549  */
4550 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4551 {
4552         struct xdr_stream xdr;
4553         struct compound_hdr hdr;
4554         int status;
4555
4556         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4557         status = decode_compound_hdr(&xdr, &hdr);
4558         if (status)
4559                 goto out;
4560         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4561         if (status)
4562                 goto out;
4563         if ((status = decode_putfh(&xdr)) != 0)
4564                 goto out;
4565         if ((status = decode_savefh(&xdr)) != 0)
4566                 goto out;
4567         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4568                 goto out;
4569         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4570                 goto out;
4571         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4572                 goto out;
4573         if ((status = decode_restorefh(&xdr)) != 0)
4574                 goto out;
4575         decode_getfattr(&xdr, res->dir_fattr, res->server);
4576 out:
4577         return status;
4578 }
4579
4580 /*
4581  * Decode SYMLINK response
4582  */
4583 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4584 {
4585         return nfs4_xdr_dec_create(rqstp, p, res);
4586 }
4587
4588 /*
4589  * Decode GETATTR response
4590  */
4591 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4592 {
4593         struct xdr_stream xdr;
4594         struct compound_hdr hdr;
4595         int status;
4596
4597         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4598         status = decode_compound_hdr(&xdr, &hdr);
4599         if (status)
4600                 goto out;
4601         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4602         if (status)
4603                 goto out;
4604         status = decode_putfh(&xdr);
4605         if (status)
4606                 goto out;
4607         status = decode_getfattr(&xdr, res->fattr, res->server);
4608 out:
4609         return status;
4610 }
4611
4612 /*
4613  * Encode an SETACL request
4614  */
4615 static int
4616 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4617 {
4618         struct xdr_stream xdr;
4619         struct compound_hdr hdr = {
4620                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4621         };
4622         int status;
4623
4624         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4625         encode_compound_hdr(&xdr, req, &hdr);
4626         encode_sequence(&xdr, &args->seq_args, &hdr);
4627         encode_putfh(&xdr, args->fh, &hdr);
4628         status = encode_setacl(&xdr, args, &hdr);
4629         encode_nops(&hdr);
4630         return status;
4631 }
4632
4633 /*
4634  * Decode SETACL response
4635  */
4636 static int
4637 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4638                     struct nfs_setaclres *res)
4639 {
4640         struct xdr_stream xdr;
4641         struct compound_hdr hdr;
4642         int status;
4643
4644         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4645         status = decode_compound_hdr(&xdr, &hdr);
4646         if (status)
4647                 goto out;
4648         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4649         if (status)
4650                 goto out;
4651         status = decode_putfh(&xdr);
4652         if (status)
4653                 goto out;
4654         status = decode_setattr(&xdr);
4655 out:
4656         return status;
4657 }
4658
4659 /*
4660  * Decode GETACL response
4661  */
4662 static int
4663 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4664                     struct nfs_getaclres *res)
4665 {
4666         struct xdr_stream xdr;
4667         struct compound_hdr hdr;
4668         int status;
4669
4670         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4671         status = decode_compound_hdr(&xdr, &hdr);
4672         if (status)
4673                 goto out;
4674         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4675         if (status)
4676                 goto out;
4677         status = decode_putfh(&xdr);
4678         if (status)
4679                 goto out;
4680         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4681
4682 out:
4683         return status;
4684 }
4685
4686 /*
4687  * Decode CLOSE response
4688  */
4689 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4690 {
4691         struct xdr_stream xdr;
4692         struct compound_hdr hdr;
4693         int status;
4694
4695         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4696         status = decode_compound_hdr(&xdr, &hdr);
4697         if (status)
4698                 goto out;
4699         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4700         if (status)
4701                 goto out;
4702         status = decode_putfh(&xdr);
4703         if (status)
4704                 goto out;
4705         status = decode_close(&xdr, res);
4706         if (status != 0)
4707                 goto out;
4708         /*
4709          * Note: Server may do delete on close for this file
4710          *      in which case the getattr call will fail with
4711          *      an ESTALE error. Shouldn't be a problem,
4712          *      though, since fattr->valid will remain unset.
4713          */
4714         decode_getfattr(&xdr, res->fattr, res->server);
4715 out:
4716         return status;
4717 }
4718
4719 /*
4720  * Decode OPEN response
4721  */
4722 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4723 {
4724         struct xdr_stream xdr;
4725         struct compound_hdr hdr;
4726         int status;
4727
4728         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4729         status = decode_compound_hdr(&xdr, &hdr);
4730         if (status)
4731                 goto out;
4732         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4733         if (status)
4734                 goto out;
4735         status = decode_putfh(&xdr);
4736         if (status)
4737                 goto out;
4738         status = decode_savefh(&xdr);
4739         if (status)
4740                 goto out;
4741         status = decode_open(&xdr, res);
4742         if (status)
4743                 goto out;
4744         if (decode_getfh(&xdr, &res->fh) != 0)
4745                 goto out;
4746         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4747                 goto out;
4748         if (decode_restorefh(&xdr) != 0)
4749                 goto out;
4750         decode_getfattr(&xdr, res->dir_attr, res->server);
4751 out:
4752         return status;
4753 }
4754
4755 /*
4756  * Decode OPEN_CONFIRM response
4757  */
4758 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4759 {
4760         struct xdr_stream xdr;
4761         struct compound_hdr hdr;
4762         int status;
4763
4764         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4765         status = decode_compound_hdr(&xdr, &hdr);
4766         if (status)
4767                 goto out;
4768         status = decode_putfh(&xdr);
4769         if (status)
4770                 goto out;
4771         status = decode_open_confirm(&xdr, res);
4772 out:
4773         return status;
4774 }
4775
4776 /*
4777  * Decode OPEN response
4778  */
4779 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4780 {
4781         struct xdr_stream xdr;
4782         struct compound_hdr hdr;
4783         int status;
4784
4785         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4786         status = decode_compound_hdr(&xdr, &hdr);
4787         if (status)
4788                 goto out;
4789         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4790         if (status)
4791                 goto out;
4792         status = decode_putfh(&xdr);
4793         if (status)
4794                 goto out;
4795         status = decode_open(&xdr, res);
4796         if (status)
4797                 goto out;
4798         decode_getfattr(&xdr, res->f_attr, res->server);
4799 out:
4800         return status;
4801 }
4802
4803 /*
4804  * Decode SETATTR response
4805  */
4806 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4807 {
4808         struct xdr_stream xdr;
4809         struct compound_hdr hdr;
4810         int status;
4811
4812         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4813         status = decode_compound_hdr(&xdr, &hdr);
4814         if (status)
4815                 goto out;
4816         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4817         if (status)
4818                 goto out;
4819         status = decode_putfh(&xdr);
4820         if (status)
4821                 goto out;
4822         status = decode_setattr(&xdr);
4823         if (status)
4824                 goto out;
4825         decode_getfattr(&xdr, res->fattr, res->server);
4826 out:
4827         return status;
4828 }
4829
4830 /*
4831  * Decode LOCK response
4832  */
4833 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_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_lock(&xdr, res);
4850 out:
4851         return status;
4852 }
4853
4854 /*
4855  * Decode LOCKT response
4856  */
4857 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_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_lockt(&xdr, res);
4874 out:
4875         return status;
4876 }
4877
4878 /*
4879  * Decode LOCKU response
4880  */
4881 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4882 {
4883         struct xdr_stream xdr;
4884         struct compound_hdr hdr;
4885         int status;
4886
4887         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4888         status = decode_compound_hdr(&xdr, &hdr);
4889         if (status)
4890                 goto out;
4891         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4892         if (status)
4893                 goto out;
4894         status = decode_putfh(&xdr);
4895         if (status)
4896                 goto out;
4897         status = decode_locku(&xdr, res);
4898 out:
4899         return status;
4900 }
4901
4902 /*
4903  * Decode READLINK response
4904  */
4905 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4906                                  struct nfs4_readlink_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_readlink(&xdr, rqstp);
4923 out:
4924         return status;
4925 }
4926
4927 /*
4928  * Decode READDIR response
4929  */
4930 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *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_readdir(&xdr, rqstp, res);
4947 out:
4948         return status;
4949 }
4950
4951 /*
4952  * Decode Read response
4953  */
4954 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4955 {
4956         struct xdr_stream xdr;
4957         struct compound_hdr hdr;
4958         int status;
4959
4960         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4961         status = decode_compound_hdr(&xdr, &hdr);
4962         if (status)
4963                 goto out;
4964         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4965         if (status)
4966                 goto out;
4967         status = decode_putfh(&xdr);
4968         if (status)
4969                 goto out;
4970         status = decode_read(&xdr, rqstp, res);
4971         if (!status)
4972                 status = res->count;
4973 out:
4974         return status;
4975 }
4976
4977 /*
4978  * Decode WRITE response
4979  */
4980 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4981 {
4982         struct xdr_stream xdr;
4983         struct compound_hdr hdr;
4984         int status;
4985
4986         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4987         status = decode_compound_hdr(&xdr, &hdr);
4988         if (status)
4989                 goto out;
4990         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4991         if (status)
4992                 goto out;
4993         status = decode_putfh(&xdr);
4994         if (status)
4995                 goto out;
4996         status = decode_write(&xdr, res);
4997         if (status)
4998                 goto out;
4999         decode_getfattr(&xdr, res->fattr, res->server);
5000         if (!status)
5001                 status = res->count;
5002 out:
5003         return status;
5004 }
5005
5006 /*
5007  * Decode COMMIT response
5008  */
5009 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5010 {
5011         struct xdr_stream xdr;
5012         struct compound_hdr hdr;
5013         int status;
5014
5015         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5016         status = decode_compound_hdr(&xdr, &hdr);
5017         if (status)
5018                 goto out;
5019         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5020         if (status)
5021                 goto out;
5022         status = decode_putfh(&xdr);
5023         if (status)
5024                 goto out;
5025         status = decode_commit(&xdr, res);
5026         if (status)
5027                 goto out;
5028         decode_getfattr(&xdr, res->fattr, res->server);
5029 out:
5030         return status;
5031 }
5032
5033 /*
5034  * FSINFO request
5035  */
5036 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5037                                struct nfs4_fsinfo_res *res)
5038 {
5039         struct xdr_stream xdr;
5040         struct compound_hdr hdr;
5041         int status;
5042
5043         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5044         status = decode_compound_hdr(&xdr, &hdr);
5045         if (!status)
5046                 status = decode_sequence(&xdr, &res->seq_res, req);
5047         if (!status)
5048                 status = decode_putfh(&xdr);
5049         if (!status)
5050                 status = decode_fsinfo(&xdr, res->fsinfo);
5051         return status;
5052 }
5053
5054 /*
5055  * PATHCONF request
5056  */
5057 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5058                                  struct nfs4_pathconf_res *res)
5059 {
5060         struct xdr_stream xdr;
5061         struct compound_hdr hdr;
5062         int status;
5063
5064         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5065         status = decode_compound_hdr(&xdr, &hdr);
5066         if (!status)
5067                 status = decode_sequence(&xdr, &res->seq_res, req);
5068         if (!status)
5069                 status = decode_putfh(&xdr);
5070         if (!status)
5071                 status = decode_pathconf(&xdr, res->pathconf);
5072         return status;
5073 }
5074
5075 /*
5076  * STATFS request
5077  */
5078 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5079                                struct nfs4_statfs_res *res)
5080 {
5081         struct xdr_stream xdr;
5082         struct compound_hdr hdr;
5083         int status;
5084
5085         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5086         status = decode_compound_hdr(&xdr, &hdr);
5087         if (!status)
5088                 status = decode_sequence(&xdr, &res->seq_res, req);
5089         if (!status)
5090                 status = decode_putfh(&xdr);
5091         if (!status)
5092                 status = decode_statfs(&xdr, res->fsstat);
5093         return status;
5094 }
5095
5096 /*
5097  * GETATTR_BITMAP request
5098  */
5099 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5100 {
5101         struct xdr_stream xdr;
5102         struct compound_hdr hdr;
5103         int status;
5104
5105         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5106         status = decode_compound_hdr(&xdr, &hdr);
5107         if (status)
5108                 goto out;
5109         status = decode_sequence(&xdr, &res->seq_res, req);
5110         if (status)
5111                 goto out;
5112         if ((status = decode_putfh(&xdr)) != 0)
5113                 goto out;
5114         status = decode_server_caps(&xdr, res);
5115 out:
5116         return status;
5117 }
5118
5119 /*
5120  * Decode RENEW response
5121  */
5122 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5123 {
5124         struct xdr_stream xdr;
5125         struct compound_hdr hdr;
5126         int status;
5127
5128         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5129         status = decode_compound_hdr(&xdr, &hdr);
5130         if (!status)
5131                 status = decode_renew(&xdr);
5132         return status;
5133 }
5134
5135 /*
5136  * a SETCLIENTID request
5137  */
5138 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5139                 struct nfs_client *clp)
5140 {
5141         struct xdr_stream xdr;
5142         struct compound_hdr hdr;
5143         int status;
5144
5145         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5146         status = decode_compound_hdr(&xdr, &hdr);
5147         if (!status)
5148                 status = decode_setclientid(&xdr, clp);
5149         return status;
5150 }
5151
5152 /*
5153  * a SETCLIENTID_CONFIRM request
5154  */
5155 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5156 {
5157         struct xdr_stream xdr;
5158         struct compound_hdr hdr;
5159         int status;
5160
5161         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5162         status = decode_compound_hdr(&xdr, &hdr);
5163         if (!status)
5164                 status = decode_setclientid_confirm(&xdr);
5165         if (!status)
5166                 status = decode_putrootfh(&xdr);
5167         if (!status)
5168                 status = decode_fsinfo(&xdr, fsinfo);
5169         return status;
5170 }
5171
5172 /*
5173  * DELEGRETURN request
5174  */
5175 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5176 {
5177         struct xdr_stream xdr;
5178         struct compound_hdr hdr;
5179         int status;
5180
5181         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5182         status = decode_compound_hdr(&xdr, &hdr);
5183         if (status)
5184                 goto out;
5185         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5186         if (status)
5187                 goto out;
5188         status = decode_putfh(&xdr);
5189         if (status != 0)
5190                 goto out;
5191         status = decode_delegreturn(&xdr);
5192         decode_getfattr(&xdr, res->fattr, res->server);
5193 out:
5194         return status;
5195 }
5196
5197 /*
5198  * FS_LOCATIONS request
5199  */
5200 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5201                                      struct nfs4_fs_locations_res *res)
5202 {
5203         struct xdr_stream xdr;
5204         struct compound_hdr hdr;
5205         int status;
5206
5207         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5208         status = decode_compound_hdr(&xdr, &hdr);
5209         if (status)
5210                 goto out;
5211         status = decode_sequence(&xdr, &res->seq_res, req);
5212         if (status)
5213                 goto out;
5214         if ((status = decode_putfh(&xdr)) != 0)
5215                 goto out;
5216         if ((status = decode_lookup(&xdr)) != 0)
5217                 goto out;
5218         xdr_enter_page(&xdr, PAGE_SIZE);
5219         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5220                                  res->fs_locations->server);
5221 out:
5222         return status;
5223 }
5224
5225 #if defined(CONFIG_NFS_V4_1)
5226 /*
5227  * EXCHANGE_ID request
5228  */
5229 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5230                                     void *res)
5231 {
5232         struct xdr_stream xdr;
5233         struct compound_hdr hdr;
5234         int status;
5235
5236         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5237         status = decode_compound_hdr(&xdr, &hdr);
5238         if (!status)
5239                 status = decode_exchange_id(&xdr, res);
5240         return status;
5241 }
5242
5243 /*
5244  * a CREATE_SESSION request
5245  */
5246 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5247                                        struct nfs41_create_session_res *res)
5248 {
5249         struct xdr_stream xdr;
5250         struct compound_hdr hdr;
5251         int status;
5252
5253         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5254         status = decode_compound_hdr(&xdr, &hdr);
5255         if (!status)
5256                 status = decode_create_session(&xdr, res);
5257         return status;
5258 }
5259
5260 /*
5261  * a DESTROY_SESSION request
5262  */
5263 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5264                                         void *dummy)
5265 {
5266         struct xdr_stream xdr;
5267         struct compound_hdr hdr;
5268         int status;
5269
5270         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5271         status = decode_compound_hdr(&xdr, &hdr);
5272         if (!status)
5273                 status = decode_destroy_session(&xdr, dummy);
5274         return status;
5275 }
5276
5277 /*
5278  * a SEQUENCE request
5279  */
5280 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5281                                  struct nfs4_sequence_res *res)
5282 {
5283         struct xdr_stream xdr;
5284         struct compound_hdr hdr;
5285         int status;
5286
5287         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5288         status = decode_compound_hdr(&xdr, &hdr);
5289         if (!status)
5290                 status = decode_sequence(&xdr, res, rqstp);
5291         return status;
5292 }
5293
5294 /*
5295  * a GET_LEASE_TIME request
5296  */
5297 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5298                                        struct nfs4_get_lease_time_res *res)
5299 {
5300         struct xdr_stream xdr;
5301         struct compound_hdr hdr;
5302         int status;
5303
5304         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5305         status = decode_compound_hdr(&xdr, &hdr);
5306         if (!status)
5307                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5308         if (!status)
5309                 status = decode_putrootfh(&xdr);
5310         if (!status)
5311                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5312         return status;
5313 }
5314 #endif /* CONFIG_NFS_V4_1 */
5315
5316 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5317 {
5318         uint32_t bitmap[2] = {0};
5319         uint32_t len;
5320
5321         if (!*p++) {
5322                 if (!*p)
5323                         return ERR_PTR(-EAGAIN);
5324                 entry->eof = 1;
5325                 return ERR_PTR(-EBADCOOKIE);
5326         }
5327
5328         entry->prev_cookie = entry->cookie;
5329         p = xdr_decode_hyper(p, &entry->cookie);
5330         entry->len = ntohl(*p++);
5331         entry->name = (const char *) p;
5332         p += XDR_QUADLEN(entry->len);
5333
5334         /*
5335          * In case the server doesn't return an inode number,
5336          * we fake one here.  (We don't use inode number 0,
5337          * since glibc seems to choke on it...)
5338          */
5339         entry->ino = 1;
5340
5341         len = ntohl(*p++);              /* bitmap length */
5342         if (len-- > 0) {
5343                 bitmap[0] = ntohl(*p++);
5344                 if (len-- > 0) {
5345                         bitmap[1] = ntohl(*p++);
5346                         p += len;
5347                 }
5348         }
5349         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5350         if (len > 0) {
5351                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5352                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5353                         /* Ignore the return value of rdattr_error for now */
5354                         p++;
5355                         len--;
5356                 }
5357                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5358                         xdr_decode_hyper(p, &entry->ino);
5359                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5360                         xdr_decode_hyper(p, &entry->ino);
5361                 p += len;
5362         }
5363
5364         entry->eof = !p[0] && p[1];
5365         return p;
5366 }
5367
5368 /*
5369  * We need to translate between nfs status return values and
5370  * the local errno values which may not be the same.
5371  */
5372 static struct {
5373         int stat;
5374         int errno;
5375 } nfs_errtbl[] = {
5376         { NFS4_OK,              0               },
5377         { NFS4ERR_PERM,         -EPERM          },
5378         { NFS4ERR_NOENT,        -ENOENT         },
5379         { NFS4ERR_IO,           -errno_NFSERR_IO},
5380         { NFS4ERR_NXIO,         -ENXIO          },
5381         { NFS4ERR_ACCESS,       -EACCES         },
5382         { NFS4ERR_EXIST,        -EEXIST         },
5383         { NFS4ERR_XDEV,         -EXDEV          },
5384         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5385         { NFS4ERR_ISDIR,        -EISDIR         },
5386         { NFS4ERR_INVAL,        -EINVAL         },
5387         { NFS4ERR_FBIG,         -EFBIG          },
5388         { NFS4ERR_NOSPC,        -ENOSPC         },
5389         { NFS4ERR_ROFS,         -EROFS          },
5390         { NFS4ERR_MLINK,        -EMLINK         },
5391         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5392         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5393         { NFS4ERR_DQUOT,        -EDQUOT         },
5394         { NFS4ERR_STALE,        -ESTALE         },
5395         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5396         { NFS4ERR_BADOWNER,     -EINVAL         },
5397         { NFS4ERR_BADNAME,      -EINVAL         },
5398         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5399         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5400         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5401         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5402         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5403         { NFS4ERR_LOCKED,       -EAGAIN         },
5404         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5405         { NFS4ERR_SYMLINK,      -ELOOP          },
5406         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5407         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5408         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5409                                                     * to be handled by a
5410                                                     * middle-layer.
5411                                                     */
5412         { -1,                   -EIO            }
5413 };
5414
5415 /*
5416  * Convert an NFS error code to a local one.
5417  * This one is used jointly by NFSv2 and NFSv3.
5418  */
5419 static int
5420 nfs4_stat_to_errno(int stat)
5421 {
5422         int i;
5423         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5424                 if (nfs_errtbl[i].stat == stat)
5425                         return nfs_errtbl[i].errno;
5426         }
5427         if (stat <= 10000 || stat > 10100) {
5428                 /* The server is looney tunes. */
5429                 return -ESERVERFAULT;
5430         }
5431         /* If we cannot translate the error, the recovery routines should
5432          * handle it.
5433          * Note: remaining NFSv4 error codes have values > 10000, so should
5434          * not conflict with native Linux error codes.
5435          */
5436         return -stat;
5437 }
5438
5439 #define PROC(proc, argtype, restype)                            \
5440 [NFSPROC4_CLNT_##proc] = {                                      \
5441         .p_proc   = NFSPROC4_COMPOUND,                          \
5442         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5443         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5444         .p_arglen = NFS4_##argtype##_sz,                        \
5445         .p_replen = NFS4_##restype##_sz,                        \
5446         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5447         .p_name   = #proc,                                      \
5448 }
5449
5450 struct rpc_procinfo     nfs4_procedures[] = {
5451   PROC(READ,            enc_read,       dec_read),
5452   PROC(WRITE,           enc_write,      dec_write),
5453   PROC(COMMIT,          enc_commit,     dec_commit),
5454   PROC(OPEN,            enc_open,       dec_open),
5455   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5456   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5457   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5458   PROC(CLOSE,           enc_close,      dec_close),
5459   PROC(SETATTR,         enc_setattr,    dec_setattr),
5460   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5461   PROC(RENEW,           enc_renew,      dec_renew),
5462   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5463   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5464   PROC(LOCK,            enc_lock,       dec_lock),
5465   PROC(LOCKT,           enc_lockt,      dec_lockt),
5466   PROC(LOCKU,           enc_locku,      dec_locku),
5467   PROC(ACCESS,          enc_access,     dec_access),
5468   PROC(GETATTR,         enc_getattr,    dec_getattr),
5469   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5470   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5471   PROC(REMOVE,          enc_remove,     dec_remove),
5472   PROC(RENAME,          enc_rename,     dec_rename),
5473   PROC(LINK,            enc_link,       dec_link),
5474   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5475   PROC(CREATE,          enc_create,     dec_create),
5476   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5477   PROC(STATFS,          enc_statfs,     dec_statfs),
5478   PROC(READLINK,        enc_readlink,   dec_readlink),
5479   PROC(READDIR,         enc_readdir,    dec_readdir),
5480   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5481   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5482   PROC(GETACL,          enc_getacl,     dec_getacl),
5483   PROC(SETACL,          enc_setacl,     dec_setacl),
5484   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5485 #if defined(CONFIG_NFS_V4_1)
5486   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5487   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5488   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5489   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5490   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5491 #endif /* CONFIG_NFS_V4_1 */
5492 };
5493
5494 struct rpc_version              nfs_version4 = {
5495         .number                 = 4,
5496         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5497         .procs                  = nfs4_procedures
5498 };
5499
5500 /*
5501  * Local variables:
5502  *  c-basic-offset: 8
5503  * End:
5504  */