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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 RESERVE_SPACE(nbytes)   do {                            \
 716         p = xdr_reserve_space(xdr, nbytes);                     \
 717         BUG_ON(!p);                                             \
 718 } while (0)
 719
 720 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 721 {
 722         __be32 *p;
 723
 724         p = xdr_reserve_space(xdr, 4 + len);
 725         BUG_ON(p == NULL);
 726         xdr_encode_opaque(p, str, len);
 727 }
 728
 729 static void encode_compound_hdr(struct xdr_stream *xdr,
 730                                 struct rpc_rqst *req,
 731                                 struct compound_hdr *hdr)
 732 {
 733         __be32 *p;
 734         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 735
 736         /* initialize running count of expected bytes in reply.
 737          * NOTE: the replied tag SHOULD be the same is the one sent,
 738          * but this is not required as a MUST for the server to do so. */
 739         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 740
 741         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 742         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 743         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 744         *p++ = cpu_to_be32(hdr->taglen);
 745         p = xdr_encode_opaque_fixed(p, hdr->tag, hdr->taglen);
 746         *p++ = cpu_to_be32(hdr->minorversion);
 747         hdr->nops_p = p;
 748         *p++ = cpu_to_be32(hdr->nops);
 749 }
 750
 751 static void encode_nops(struct compound_hdr *hdr)
 752 {
 753         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 754         *hdr->nops_p = htonl(hdr->nops);
 755 }
 756
 757 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 758 {
 759         __be32 *p;
 760
 761         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 762         BUG_ON(p == NULL);
 763         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 764 }
 765
 766 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 767 {
 768         char owner_name[IDMAP_NAMESZ];
 769         char owner_group[IDMAP_NAMESZ];
 770         int owner_namelen = 0;
 771         int owner_grouplen = 0;
 772         __be32 *p;
 773         __be32 *q;
 774         int len;
 775         uint32_t bmval0 = 0;
 776         uint32_t bmval1 = 0;
 777
 778         /*
 779          * We reserve enough space to write the entire attribute buffer at once.
 780          * In the worst-case, this would be
 781          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 782          *          = 36 bytes, plus any contribution from variable-length fields
 783          *            such as owner/group.
 784          */
 785         len = 16;
 786
 787         /* Sigh */
 788         if (iap->ia_valid & ATTR_SIZE)
 789                 len += 8;
 790         if (iap->ia_valid & ATTR_MODE)
 791                 len += 4;
 792         if (iap->ia_valid & ATTR_UID) {
 793                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 794                 if (owner_namelen < 0) {
 795                         dprintk("nfs: couldn't resolve uid %d to string\n",
 796                                         iap->ia_uid);
 797                         /* XXX */
 798                         strcpy(owner_name, "nobody");
 799                         owner_namelen = sizeof("nobody") - 1;
 800                         /* goto out; */
 801                 }
 802                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 803         }
 804         if (iap->ia_valid & ATTR_GID) {
 805                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 806                 if (owner_grouplen < 0) {
 807                         dprintk("nfs: couldn't resolve gid %d to string\n",
 808                                         iap->ia_gid);
 809                         strcpy(owner_group, "nobody");
 810                         owner_grouplen = sizeof("nobody") - 1;
 811                         /* goto out; */
 812                 }
 813                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 814         }
 815         if (iap->ia_valid & ATTR_ATIME_SET)
 816                 len += 16;
 817         else if (iap->ia_valid & ATTR_ATIME)
 818                 len += 4;
 819         if (iap->ia_valid & ATTR_MTIME_SET)
 820                 len += 16;
 821         else if (iap->ia_valid & ATTR_MTIME)
 822                 len += 4;
 823         RESERVE_SPACE(len);
 824
 825         /*
 826          * We write the bitmap length now, but leave the bitmap and the attribute
 827          * buffer length to be backfilled at the end of this routine.
 828          */
 829         *p++ = cpu_to_be32(2);
 830         q = p;
 831         p += 3;
 832
 833         if (iap->ia_valid & ATTR_SIZE) {
 834                 bmval0 |= FATTR4_WORD0_SIZE;
 835                 p = xdr_encode_hyper(p, iap->ia_size);
 836         }
 837         if (iap->ia_valid & ATTR_MODE) {
 838                 bmval1 |= FATTR4_WORD1_MODE;
 839                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 840         }
 841         if (iap->ia_valid & ATTR_UID) {
 842                 bmval1 |= FATTR4_WORD1_OWNER;
 843                 *p++ = cpu_to_be32(owner_namelen);
 844                 p = xdr_encode_opaque_fixed(p, owner_name, owner_namelen);
 845         }
 846         if (iap->ia_valid & ATTR_GID) {
 847                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 848                 *p++ = cpu_to_be32(owner_grouplen);
 849                 p = xdr_encode_opaque_fixed(p, owner_group, owner_grouplen);
 850         }
 851         if (iap->ia_valid & ATTR_ATIME_SET) {
 852                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 853                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 854                 *p++ = cpu_to_be32(0);
 855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 856                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 857         }
 858         else if (iap->ia_valid & ATTR_ATIME) {
 859                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 860                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 861         }
 862         if (iap->ia_valid & ATTR_MTIME_SET) {
 863                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 864                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 865                 *p++ = cpu_to_be32(0);
 866                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 867                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 868         }
 869         else if (iap->ia_valid & ATTR_MTIME) {
 870                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 871                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 872         }
 873
 874         /*
 875          * Now we backfill the bitmap and the attribute buffer length.
 876          */
 877         if (len != ((char *)p - (char *)q) + 4) {
 878                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 879                                 len, ((char *)p - (char *)q) + 4);
 880                 BUG();
 881         }
 882         len = (char *)p - (char *)q - 12;
 883         *q++ = htonl(bmval0);
 884         *q++ = htonl(bmval1);
 885         *q++ = htonl(len);
 886
 887 /* out: */
 888 }
 889
 890 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 891 {
 892         __be32 *p;
 893
 894         RESERVE_SPACE(8);
 895         *p++ = cpu_to_be32(OP_ACCESS);
 896         *p++ = cpu_to_be32(access);
 897         hdr->nops++;
 898         hdr->replen += decode_access_maxsz;
 899 }
 900
 901 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 902 {
 903         __be32 *p;
 904
 905         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 906         *p++ = cpu_to_be32(OP_CLOSE);
 907         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 908         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 909         hdr->nops++;
 910         hdr->replen += decode_close_maxsz;
 911 }
 912
 913 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 914 {
 915         __be32 *p;
 916
 917         RESERVE_SPACE(16);
 918         *p++ = cpu_to_be32(OP_COMMIT);
 919         p = xdr_encode_hyper(p, args->offset);
 920         *p++ = cpu_to_be32(args->count);
 921         hdr->nops++;
 922         hdr->replen += decode_commit_maxsz;
 923 }
 924
 925 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 926 {
 927         __be32 *p;
 928
 929         RESERVE_SPACE(8);
 930         *p++ = cpu_to_be32(OP_CREATE);
 931         *p++ = cpu_to_be32(create->ftype);
 932
 933         switch (create->ftype) {
 934         case NF4LNK:
 935                 RESERVE_SPACE(4);
 936                 *p++ = cpu_to_be32(create->u.symlink.len);
 937                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 938                 break;
 939
 940         case NF4BLK: case NF4CHR:
 941                 RESERVE_SPACE(8);
 942                 *p++ = cpu_to_be32(create->u.device.specdata1);
 943                 *p++ = cpu_to_be32(create->u.device.specdata2);
 944                 break;
 945
 946         default:
 947                 break;
 948         }
 949
 950         RESERVE_SPACE(4 + create->name->len);
 951         *p++ = cpu_to_be32(create->name->len);
 952         p = xdr_encode_opaque_fixed(p, create->name->name, create->name->len);
 953         hdr->nops++;
 954         hdr->replen += decode_create_maxsz;
 955
 956         encode_attrs(xdr, create->attrs, create->server);
 957 }
 958
 959 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 960 {
 961         __be32 *p;
 962
 963         RESERVE_SPACE(12);
 964         *p++ = cpu_to_be32(OP_GETATTR);
 965         *p++ = cpu_to_be32(1);
 966         *p++ = cpu_to_be32(bitmap);
 967         hdr->nops++;
 968         hdr->replen += decode_getattr_maxsz;
 969 }
 970
 971 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 972 {
 973         __be32 *p;
 974
 975         RESERVE_SPACE(16);
 976         *p++ = cpu_to_be32(OP_GETATTR);
 977         *p++ = cpu_to_be32(2);
 978         *p++ = cpu_to_be32(bm0);
 979         *p++ = cpu_to_be32(bm1);
 980         hdr->nops++;
 981         hdr->replen += decode_getattr_maxsz;
 982 }
 983
 984 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 985 {
 986         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 987                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 988 }
 989
 990 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 991 {
 992         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 993                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 994 }
 995
 996 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 997 {
 998         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 999                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1000 }
1001
1002 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1003 {
1004         __be32 *p;
1005
1006         RESERVE_SPACE(4);
1007         *p++ = cpu_to_be32(OP_GETFH);
1008         hdr->nops++;
1009         hdr->replen += decode_getfh_maxsz;
1010 }
1011
1012 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1013 {
1014         __be32 *p;
1015
1016         RESERVE_SPACE(8 + name->len);
1017         *p++ = cpu_to_be32(OP_LINK);
1018         *p++ = cpu_to_be32(name->len);
1019         p = xdr_encode_opaque_fixed(p, name->name, name->len);
1020         hdr->nops++;
1021         hdr->replen += decode_link_maxsz;
1022 }
1023
1024 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1025 {
1026         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1027                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1028         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1029 }
1030
1031 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1032 {
1033         if (fl->fl_end == OFFSET_MAX)
1034                 return ~(uint64_t)0;
1035         return fl->fl_end - fl->fl_start + 1;
1036 }
1037
1038 /*
1039  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1040  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1041  */
1042 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1043 {
1044         __be32 *p;
1045
1046         RESERVE_SPACE(32);
1047         *p++ = cpu_to_be32(OP_LOCK);
1048         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1049         *p++ = cpu_to_be32(args->reclaim);
1050         p = xdr_encode_hyper(p, args->fl->fl_start);
1051         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1052         *p++ = cpu_to_be32(args->new_lock_owner);
1053         if (args->new_lock_owner){
1054                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1055                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1056                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1057                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1058                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1059                 *p++ = cpu_to_be32(16);
1060                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1061                 p = xdr_encode_hyper(p, args->lock_owner.id);
1062         }
1063         else {
1064                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1065                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1066                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1067         }
1068         hdr->nops++;
1069         hdr->replen += decode_lock_maxsz;
1070 }
1071
1072 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1073 {
1074         __be32 *p;
1075
1076         RESERVE_SPACE(52);
1077         *p++ = cpu_to_be32(OP_LOCKT);
1078         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1079         p = xdr_encode_hyper(p, args->fl->fl_start);
1080         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1081         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1082         *p++ = cpu_to_be32(16);
1083         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1084         p = xdr_encode_hyper(p, args->lock_owner.id);
1085         hdr->nops++;
1086         hdr->replen += decode_lockt_maxsz;
1087 }
1088
1089 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1090 {
1091         __be32 *p;
1092
1093         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1094         *p++ = cpu_to_be32(OP_LOCKU);
1095         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1096         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1097         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1098         p = xdr_encode_hyper(p, args->fl->fl_start);
1099         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1100         hdr->nops++;
1101         hdr->replen += decode_locku_maxsz;
1102 }
1103
1104 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1105 {
1106         int len = name->len;
1107         __be32 *p;
1108
1109         RESERVE_SPACE(8 + len);
1110         *p++ = cpu_to_be32(OP_LOOKUP);
1111         *p++ = cpu_to_be32(len);
1112         p = xdr_encode_opaque_fixed(p, name->name, len);
1113         hdr->nops++;
1114         hdr->replen += decode_lookup_maxsz;
1115 }
1116
1117 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1118 {
1119         __be32 *p;
1120
1121         RESERVE_SPACE(8);
1122         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1123         case FMODE_READ:
1124                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1125                 break;
1126         case FMODE_WRITE:
1127                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1128                 break;
1129         case FMODE_READ|FMODE_WRITE:
1130                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1131                 break;
1132         default:
1133                 *p++ = cpu_to_be32(0);
1134         }
1135         *p++ = cpu_to_be32(0);          /* for linux, share_deny = 0 always */
1136 }
1137
1138 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1139 {
1140         __be32 *p;
1141  /*
1142  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1143  * owner 4 = 32
1144  */
1145         RESERVE_SPACE(8);
1146         *p++ = cpu_to_be32(OP_OPEN);
1147         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1148         encode_share_access(xdr, arg->fmode);
1149         RESERVE_SPACE(28);
1150         p = xdr_encode_hyper(p, arg->clientid);
1151         *p++ = cpu_to_be32(16);
1152         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1153         p = xdr_encode_hyper(p, arg->id);
1154 }
1155
1156 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1157 {
1158         __be32 *p;
1159
1160         RESERVE_SPACE(4);
1161         switch(arg->open_flags & O_EXCL) {
1162         case 0:
1163                 *p++ = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1164                 encode_attrs(xdr, arg->u.attrs, arg->server);
1165                 break;
1166         default:
1167                 *p++ = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1168                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1169         }
1170 }
1171
1172 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1173 {
1174         __be32 *p;
1175
1176         RESERVE_SPACE(4);
1177         switch (arg->open_flags & O_CREAT) {
1178         case 0:
1179                 *p++ = cpu_to_be32(NFS4_OPEN_NOCREATE);
1180                 break;
1181         default:
1182                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1183                 *p++ = cpu_to_be32(NFS4_OPEN_CREATE);
1184                 encode_createmode(xdr, arg);
1185         }
1186 }
1187
1188 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1189 {
1190         __be32 *p;
1191
1192         RESERVE_SPACE(4);
1193         switch (delegation_type) {
1194         case 0:
1195                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1196                 break;
1197         case FMODE_READ:
1198                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1199                 break;
1200         case FMODE_WRITE|FMODE_READ:
1201                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1202                 break;
1203         default:
1204                 BUG();
1205         }
1206 }
1207
1208 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1209 {
1210         __be32 *p;
1211
1212         RESERVE_SPACE(4);
1213         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1214         encode_string(xdr, name->len, name->name);
1215 }
1216
1217 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1218 {
1219         __be32 *p;
1220
1221         RESERVE_SPACE(4);
1222         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1223         encode_delegation_type(xdr, type);
1224 }
1225
1226 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1227 {
1228         __be32 *p;
1229
1230         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1231         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1232         p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1233         encode_string(xdr, name->len, name->name);
1234 }
1235
1236 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1237 {
1238         encode_openhdr(xdr, arg);
1239         encode_opentype(xdr, arg);
1240         switch (arg->claim) {
1241         case NFS4_OPEN_CLAIM_NULL:
1242                 encode_claim_null(xdr, arg->name);
1243                 break;
1244         case NFS4_OPEN_CLAIM_PREVIOUS:
1245                 encode_claim_previous(xdr, arg->u.delegation_type);
1246                 break;
1247         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1248                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1249                 break;
1250         default:
1251                 BUG();
1252         }
1253         hdr->nops++;
1254         hdr->replen += decode_open_maxsz;
1255 }
1256
1257 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1258 {
1259         __be32 *p;
1260
1261         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1262         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1263         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1264         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1265         hdr->nops++;
1266         hdr->replen += decode_open_confirm_maxsz;
1267 }
1268
1269 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1270 {
1271         __be32 *p;
1272
1273         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1274         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1275         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1276         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1277         encode_share_access(xdr, arg->fmode);
1278         hdr->nops++;
1279         hdr->replen += decode_open_downgrade_maxsz;
1280 }
1281
1282 static void
1283 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1284 {
1285         int len = fh->size;
1286         __be32 *p;
1287
1288         RESERVE_SPACE(8 + len);
1289         *p++ = cpu_to_be32(OP_PUTFH);
1290         *p++ = cpu_to_be32(len);
1291         p = xdr_encode_opaque_fixed(p, fh->data, len);
1292         hdr->nops++;
1293         hdr->replen += decode_putfh_maxsz;
1294 }
1295
1296 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1297 {
1298         __be32 *p;
1299
1300         RESERVE_SPACE(4);
1301         *p++ = cpu_to_be32(OP_PUTROOTFH);
1302         hdr->nops++;
1303         hdr->replen += decode_putrootfh_maxsz;
1304 }
1305
1306 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1307 {
1308         nfs4_stateid stateid;
1309         __be32 *p;
1310
1311         RESERVE_SPACE(NFS4_STATEID_SIZE);
1312         if (ctx->state != NULL) {
1313                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1314                 p = xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1315         } else
1316                 p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1317 }
1318
1319 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1320 {
1321         __be32 *p;
1322
1323         RESERVE_SPACE(4);
1324         *p++ = cpu_to_be32(OP_READ);
1325
1326         encode_stateid(xdr, args->context);
1327
1328         RESERVE_SPACE(12);
1329         p = xdr_encode_hyper(p, args->offset);
1330         *p++ = cpu_to_be32(args->count);
1331         hdr->nops++;
1332         hdr->replen += decode_read_maxsz;
1333 }
1334
1335 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1336 {
1337         uint32_t attrs[2] = {
1338                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1339                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1340         };
1341         __be32 *p;
1342
1343         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1344         *p++ = cpu_to_be32(OP_READDIR);
1345         p = xdr_encode_hyper(p, readdir->cookie);
1346         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1347         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1348         *p++ = cpu_to_be32(readdir->count);
1349         *p++ = cpu_to_be32(2);
1350         /* Switch to mounted_on_fileid if the server supports it */
1351         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1352                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1353         else
1354                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1355         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1356         *p++ = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1357         hdr->nops++;
1358         hdr->replen += decode_readdir_maxsz;
1359         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1360                         __func__,
1361                         (unsigned long long)readdir->cookie,
1362                         ((u32 *)readdir->verifier.data)[0],
1363                         ((u32 *)readdir->verifier.data)[1],
1364                         attrs[0] & readdir->bitmask[0],
1365                         attrs[1] & readdir->bitmask[1]);
1366 }
1367
1368 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1369 {
1370         __be32 *p;
1371
1372         RESERVE_SPACE(4);
1373         *p++ = cpu_to_be32(OP_READLINK);
1374         hdr->nops++;
1375         hdr->replen += decode_readlink_maxsz;
1376 }
1377
1378 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380         __be32 *p;
1381
1382         RESERVE_SPACE(8 + name->len);
1383         *p++ = cpu_to_be32(OP_REMOVE);
1384         *p++ = cpu_to_be32(name->len);
1385         p = xdr_encode_opaque_fixed(p, name->name, name->len);
1386         hdr->nops++;
1387         hdr->replen += decode_remove_maxsz;
1388 }
1389
1390 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1391 {
1392         __be32 *p;
1393
1394         RESERVE_SPACE(8 + oldname->len);
1395         *p++ = cpu_to_be32(OP_RENAME);
1396         *p++ = cpu_to_be32(oldname->len);
1397         p = xdr_encode_opaque_fixed(p, oldname->name, oldname->len);
1398
1399         RESERVE_SPACE(4 + newname->len);
1400         *p++ = cpu_to_be32(newname->len);
1401         p = xdr_encode_opaque_fixed(p, newname->name, newname->len);
1402         hdr->nops++;
1403         hdr->replen += decode_rename_maxsz;
1404 }
1405
1406 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1407 {
1408         __be32 *p;
1409
1410         RESERVE_SPACE(12);
1411         *p++ = cpu_to_be32(OP_RENEW);
1412         p = xdr_encode_hyper(p, client_stateid->cl_clientid);
1413         hdr->nops++;
1414         hdr->replen += decode_renew_maxsz;
1415 }
1416
1417 static void
1418 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1419 {
1420         __be32 *p;
1421
1422         RESERVE_SPACE(4);
1423         *p++ = cpu_to_be32(OP_RESTOREFH);
1424         hdr->nops++;
1425         hdr->replen += decode_restorefh_maxsz;
1426 }
1427
1428 static int
1429 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1430 {
1431         __be32 *p;
1432
1433         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1434         *p++ = cpu_to_be32(OP_SETATTR);
1435         p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1436         RESERVE_SPACE(2*4);
1437         *p++ = cpu_to_be32(1);
1438         *p++ = cpu_to_be32(FATTR4_WORD0_ACL);
1439         if (arg->acl_len % 4)
1440                 return -EINVAL;
1441         RESERVE_SPACE(4);
1442         *p++ = cpu_to_be32(arg->acl_len);
1443         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1444         hdr->nops++;
1445         hdr->replen += decode_setacl_maxsz;
1446         return 0;
1447 }
1448
1449 static void
1450 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1451 {
1452         __be32 *p;
1453
1454         RESERVE_SPACE(4);
1455         *p++ = cpu_to_be32(OP_SAVEFH);
1456         hdr->nops++;
1457         hdr->replen += decode_savefh_maxsz;
1458 }
1459
1460 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1461 {
1462         __be32 *p;
1463
1464         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1465         *p++ = cpu_to_be32(OP_SETATTR);
1466         p = xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1467         hdr->nops++;
1468         hdr->replen += decode_setattr_maxsz;
1469         encode_attrs(xdr, arg->iap, server);
1470 }
1471
1472 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1473 {
1474         __be32 *p;
1475
1476         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1477         *p++ = cpu_to_be32(OP_SETCLIENTID);
1478         p = xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1479
1480         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1481         RESERVE_SPACE(4);
1482         *p++ = cpu_to_be32(setclientid->sc_prog);
1483         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1484         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1485         RESERVE_SPACE(4);
1486         *p++ = cpu_to_be32(setclientid->sc_cb_ident);
1487         hdr->nops++;
1488         hdr->replen += decode_setclientid_maxsz;
1489 }
1490
1491 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1492 {
1493         __be32 *p;
1494
1495         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1496         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1497         p = xdr_encode_hyper(p, client_state->cl_clientid);
1498         p = xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1499         hdr->nops++;
1500         hdr->replen += decode_setclientid_confirm_maxsz;
1501 }
1502
1503 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1504 {
1505         __be32 *p;
1506
1507         RESERVE_SPACE(4);
1508         *p++ = cpu_to_be32(OP_WRITE);
1509
1510         encode_stateid(xdr, args->context);
1511
1512         RESERVE_SPACE(16);
1513         p = xdr_encode_hyper(p, args->offset);
1514         *p++ = cpu_to_be32(args->stable);
1515         *p++ = cpu_to_be32(args->count);
1516
1517         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1518         hdr->nops++;
1519         hdr->replen += decode_write_maxsz;
1520 }
1521
1522 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1523 {
1524         __be32 *p;
1525
1526         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1527
1528         *p++ = cpu_to_be32(OP_DELEGRETURN);
1529         p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1530         hdr->nops++;
1531         hdr->replen += decode_delegreturn_maxsz;
1532 }
1533
1534 #if defined(CONFIG_NFS_V4_1)
1535 /* NFSv4.1 operations */
1536 static void encode_exchange_id(struct xdr_stream *xdr,
1537                                struct nfs41_exchange_id_args *args,
1538                                struct compound_hdr *hdr)
1539 {
1540         __be32 *p;
1541
1542         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1543         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1544         p = xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1545
1546         encode_string(xdr, args->id_len, args->id);
1547
1548         RESERVE_SPACE(12);
1549         *p++ = cpu_to_be32(args->flags);
1550         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1551         *p++ = cpu_to_be32(0);  /* zero length implementation id array */
1552         hdr->nops++;
1553         hdr->replen += decode_exchange_id_maxsz;
1554 }
1555
1556 static void encode_create_session(struct xdr_stream *xdr,
1557                                   struct nfs41_create_session_args *args,
1558                                   struct compound_hdr *hdr)
1559 {
1560         __be32 *p;
1561         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1562         uint32_t len;
1563         struct nfs_client *clp = args->client;
1564
1565         RESERVE_SPACE(4);
1566         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1567
1568         RESERVE_SPACE(8);
1569         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1570
1571         RESERVE_SPACE(8);
1572         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1573         *p++ = cpu_to_be32(args->flags);                        /*flags */
1574
1575         RESERVE_SPACE(2*28);                    /* 2 channel_attrs */
1576         /* Fore Channel */
1577         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1578         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1579         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1580         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1581         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1582         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1583         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1584
1585         /* Back Channel */
1586         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1587         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1588         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1589         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1590         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1591         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1592         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1593
1594         RESERVE_SPACE(4);
1595         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1596
1597         RESERVE_SPACE(4);                       /* # of security flavors */
1598         *p++ = cpu_to_be32(1);
1599
1600         RESERVE_SPACE(4);
1601         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1602
1603         /* authsys_parms rfc1831 */
1604         RESERVE_SPACE(4);
1605         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1606         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1607                         clp->cl_ipaddr);
1608         RESERVE_SPACE(16 + len);
1609         *p++ = cpu_to_be32(len);
1610         p = xdr_encode_opaque_fixed(p, machine_name, len);
1611         *p++ = cpu_to_be32(0);                          /* UID */
1612         *p++ = cpu_to_be32(0);                          /* GID */
1613         *p++ = cpu_to_be32(0);                          /* No more gids */
1614         hdr->nops++;
1615         hdr->replen += decode_create_session_maxsz;
1616 }
1617
1618 static void encode_destroy_session(struct xdr_stream *xdr,
1619                                    struct nfs4_session *session,
1620                                    struct compound_hdr *hdr)
1621 {
1622         __be32 *p;
1623         RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN);
1624         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1625         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1626         hdr->nops++;
1627         hdr->replen += decode_destroy_session_maxsz;
1628 }
1629 #endif /* CONFIG_NFS_V4_1 */
1630
1631 static void encode_sequence(struct xdr_stream *xdr,
1632                             const struct nfs4_sequence_args *args,
1633                             struct compound_hdr *hdr)
1634 {
1635 #if defined(CONFIG_NFS_V4_1)
1636         struct nfs4_session *session = args->sa_session;
1637         struct nfs4_slot_table *tp;
1638         struct nfs4_slot *slot;
1639         __be32 *p;
1640
1641         if (!session)
1642                 return;
1643
1644         tp = &session->fc_slot_table;
1645
1646         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1647         slot = tp->slots + args->sa_slotid;
1648
1649         RESERVE_SPACE(4);
1650         *p++ = cpu_to_be32(OP_SEQUENCE);
1651
1652         /*
1653          * Sessionid + seqid + slotid + max slotid + cache_this
1654          */
1655         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1656                 "max_slotid=%d cache_this=%d\n",
1657                 __func__,
1658                 ((u32 *)session->sess_id.data)[0],
1659                 ((u32 *)session->sess_id.data)[1],
1660                 ((u32 *)session->sess_id.data)[2],
1661                 ((u32 *)session->sess_id.data)[3],
1662                 slot->seq_nr, args->sa_slotid,
1663                 tp->highest_used_slotid, args->sa_cache_this);
1664         RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 16);
1665         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1666         *p++ = cpu_to_be32(slot->seq_nr);
1667         *p++ = cpu_to_be32(args->sa_slotid);
1668         *p++ = cpu_to_be32(tp->highest_used_slotid);
1669         *p++ = cpu_to_be32(args->sa_cache_this);
1670         hdr->nops++;
1671         hdr->replen += decode_sequence_maxsz;
1672 #endif /* CONFIG_NFS_V4_1 */
1673 }
1674
1675 /*
1676  * END OF "GENERIC" ENCODE ROUTINES.
1677  */
1678
1679 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1680 {
1681 #if defined(CONFIG_NFS_V4_1)
1682         if (args->sa_session)
1683                 return args->sa_session->clp->cl_minorversion;
1684 #endif /* CONFIG_NFS_V4_1 */
1685         return 0;
1686 }
1687
1688 /*
1689  * Encode an ACCESS request
1690  */
1691 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1692 {
1693         struct xdr_stream xdr;
1694         struct compound_hdr hdr = {
1695                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1696         };
1697
1698         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1699         encode_compound_hdr(&xdr, req, &hdr);
1700         encode_sequence(&xdr, &args->seq_args, &hdr);
1701         encode_putfh(&xdr, args->fh, &hdr);
1702         encode_access(&xdr, args->access, &hdr);
1703         encode_getfattr(&xdr, args->bitmask, &hdr);
1704         encode_nops(&hdr);
1705         return 0;
1706 }
1707
1708 /*
1709  * Encode LOOKUP request
1710  */
1711 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1712 {
1713         struct xdr_stream xdr;
1714         struct compound_hdr hdr = {
1715                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1716         };
1717
1718         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1719         encode_compound_hdr(&xdr, req, &hdr);
1720         encode_sequence(&xdr, &args->seq_args, &hdr);
1721         encode_putfh(&xdr, args->dir_fh, &hdr);
1722         encode_lookup(&xdr, args->name, &hdr);
1723         encode_getfh(&xdr, &hdr);
1724         encode_getfattr(&xdr, args->bitmask, &hdr);
1725         encode_nops(&hdr);
1726         return 0;
1727 }
1728
1729 /*
1730  * Encode LOOKUP_ROOT request
1731  */
1732 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1733 {
1734         struct xdr_stream xdr;
1735         struct compound_hdr hdr = {
1736                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1737         };
1738
1739         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1740         encode_compound_hdr(&xdr, req, &hdr);
1741         encode_sequence(&xdr, &args->seq_args, &hdr);
1742         encode_putrootfh(&xdr, &hdr);
1743         encode_getfh(&xdr, &hdr);
1744         encode_getfattr(&xdr, args->bitmask, &hdr);
1745         encode_nops(&hdr);
1746         return 0;
1747 }
1748
1749 /*
1750  * Encode REMOVE request
1751  */
1752 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1753 {
1754         struct xdr_stream xdr;
1755         struct compound_hdr hdr = {
1756                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1757         };
1758
1759         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1760         encode_compound_hdr(&xdr, req, &hdr);
1761         encode_sequence(&xdr, &args->seq_args, &hdr);
1762         encode_putfh(&xdr, args->fh, &hdr);
1763         encode_remove(&xdr, &args->name, &hdr);
1764         encode_getfattr(&xdr, args->bitmask, &hdr);
1765         encode_nops(&hdr);
1766         return 0;
1767 }
1768
1769 /*
1770  * Encode RENAME request
1771  */
1772 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1773 {
1774         struct xdr_stream xdr;
1775         struct compound_hdr hdr = {
1776                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1777         };
1778
1779         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1780         encode_compound_hdr(&xdr, req, &hdr);
1781         encode_sequence(&xdr, &args->seq_args, &hdr);
1782         encode_putfh(&xdr, args->old_dir, &hdr);
1783         encode_savefh(&xdr, &hdr);
1784         encode_putfh(&xdr, args->new_dir, &hdr);
1785         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1786         encode_getfattr(&xdr, args->bitmask, &hdr);
1787         encode_restorefh(&xdr, &hdr);
1788         encode_getfattr(&xdr, args->bitmask, &hdr);
1789         encode_nops(&hdr);
1790         return 0;
1791 }
1792
1793 /*
1794  * Encode LINK request
1795  */
1796 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1797 {
1798         struct xdr_stream xdr;
1799         struct compound_hdr hdr = {
1800                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1801         };
1802
1803         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1804         encode_compound_hdr(&xdr, req, &hdr);
1805         encode_sequence(&xdr, &args->seq_args, &hdr);
1806         encode_putfh(&xdr, args->fh, &hdr);
1807         encode_savefh(&xdr, &hdr);
1808         encode_putfh(&xdr, args->dir_fh, &hdr);
1809         encode_link(&xdr, args->name, &hdr);
1810         encode_getfattr(&xdr, args->bitmask, &hdr);
1811         encode_restorefh(&xdr, &hdr);
1812         encode_getfattr(&xdr, args->bitmask, &hdr);
1813         encode_nops(&hdr);
1814         return 0;
1815 }
1816
1817 /*
1818  * Encode CREATE request
1819  */
1820 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1821 {
1822         struct xdr_stream xdr;
1823         struct compound_hdr hdr = {
1824                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1825         };
1826
1827         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1828         encode_compound_hdr(&xdr, req, &hdr);
1829         encode_sequence(&xdr, &args->seq_args, &hdr);
1830         encode_putfh(&xdr, args->dir_fh, &hdr);
1831         encode_savefh(&xdr, &hdr);
1832         encode_create(&xdr, args, &hdr);
1833         encode_getfh(&xdr, &hdr);
1834         encode_getfattr(&xdr, args->bitmask, &hdr);
1835         encode_restorefh(&xdr, &hdr);
1836         encode_getfattr(&xdr, args->bitmask, &hdr);
1837         encode_nops(&hdr);
1838         return 0;
1839 }
1840
1841 /*
1842  * Encode SYMLINK request
1843  */
1844 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1845 {
1846         return nfs4_xdr_enc_create(req, p, args);
1847 }
1848
1849 /*
1850  * Encode GETATTR request
1851  */
1852 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1853 {
1854         struct xdr_stream xdr;
1855         struct compound_hdr hdr = {
1856                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1857         };
1858
1859         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1860         encode_compound_hdr(&xdr, req, &hdr);
1861         encode_sequence(&xdr, &args->seq_args, &hdr);
1862         encode_putfh(&xdr, args->fh, &hdr);
1863         encode_getfattr(&xdr, args->bitmask, &hdr);
1864         encode_nops(&hdr);
1865         return 0;
1866 }
1867
1868 /*
1869  * Encode a CLOSE request
1870  */
1871 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1872 {
1873         struct xdr_stream xdr;
1874         struct compound_hdr hdr = {
1875                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1876         };
1877
1878         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1879         encode_compound_hdr(&xdr, req, &hdr);
1880         encode_sequence(&xdr, &args->seq_args, &hdr);
1881         encode_putfh(&xdr, args->fh, &hdr);
1882         encode_close(&xdr, args, &hdr);
1883         encode_getfattr(&xdr, args->bitmask, &hdr);
1884         encode_nops(&hdr);
1885         return 0;
1886 }
1887
1888 /*
1889  * Encode an OPEN request
1890  */
1891 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1892 {
1893         struct xdr_stream xdr;
1894         struct compound_hdr hdr = {
1895                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1896         };
1897
1898         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1899         encode_compound_hdr(&xdr, req, &hdr);
1900         encode_sequence(&xdr, &args->seq_args, &hdr);
1901         encode_putfh(&xdr, args->fh, &hdr);
1902         encode_savefh(&xdr, &hdr);
1903         encode_open(&xdr, args, &hdr);
1904         encode_getfh(&xdr, &hdr);
1905         encode_getfattr(&xdr, args->bitmask, &hdr);
1906         encode_restorefh(&xdr, &hdr);
1907         encode_getfattr(&xdr, args->bitmask, &hdr);
1908         encode_nops(&hdr);
1909         return 0;
1910 }
1911
1912 /*
1913  * Encode an OPEN_CONFIRM request
1914  */
1915 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1916 {
1917         struct xdr_stream xdr;
1918         struct compound_hdr hdr = {
1919                 .nops   = 0,
1920         };
1921
1922         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1923         encode_compound_hdr(&xdr, req, &hdr);
1924         encode_putfh(&xdr, args->fh, &hdr);
1925         encode_open_confirm(&xdr, args, &hdr);
1926         encode_nops(&hdr);
1927         return 0;
1928 }
1929
1930 /*
1931  * Encode an OPEN request with no attributes.
1932  */
1933 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1934 {
1935         struct xdr_stream xdr;
1936         struct compound_hdr hdr = {
1937                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1938         };
1939
1940         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1941         encode_compound_hdr(&xdr, req, &hdr);
1942         encode_sequence(&xdr, &args->seq_args, &hdr);
1943         encode_putfh(&xdr, args->fh, &hdr);
1944         encode_open(&xdr, args, &hdr);
1945         encode_getfattr(&xdr, args->bitmask, &hdr);
1946         encode_nops(&hdr);
1947         return 0;
1948 }
1949
1950 /*
1951  * Encode an OPEN_DOWNGRADE request
1952  */
1953 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1954 {
1955         struct xdr_stream xdr;
1956         struct compound_hdr hdr = {
1957                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1958         };
1959
1960         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1961         encode_compound_hdr(&xdr, req, &hdr);
1962         encode_sequence(&xdr, &args->seq_args, &hdr);
1963         encode_putfh(&xdr, args->fh, &hdr);
1964         encode_open_downgrade(&xdr, args, &hdr);
1965         encode_getfattr(&xdr, args->bitmask, &hdr);
1966         encode_nops(&hdr);
1967         return 0;
1968 }
1969
1970 /*
1971  * Encode a LOCK request
1972  */
1973 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1974 {
1975         struct xdr_stream xdr;
1976         struct compound_hdr hdr = {
1977                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1978         };
1979
1980         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1981         encode_compound_hdr(&xdr, req, &hdr);
1982         encode_sequence(&xdr, &args->seq_args, &hdr);
1983         encode_putfh(&xdr, args->fh, &hdr);
1984         encode_lock(&xdr, args, &hdr);
1985         encode_nops(&hdr);
1986         return 0;
1987 }
1988
1989 /*
1990  * Encode a LOCKT request
1991  */
1992 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1993 {
1994         struct xdr_stream xdr;
1995         struct compound_hdr hdr = {
1996                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1997         };
1998
1999         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2000         encode_compound_hdr(&xdr, req, &hdr);
2001         encode_sequence(&xdr, &args->seq_args, &hdr);
2002         encode_putfh(&xdr, args->fh, &hdr);
2003         encode_lockt(&xdr, args, &hdr);
2004         encode_nops(&hdr);
2005         return 0;
2006 }
2007
2008 /*
2009  * Encode a LOCKU request
2010  */
2011 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2012 {
2013         struct xdr_stream xdr;
2014         struct compound_hdr hdr = {
2015                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2016         };
2017
2018         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2019         encode_compound_hdr(&xdr, req, &hdr);
2020         encode_sequence(&xdr, &args->seq_args, &hdr);
2021         encode_putfh(&xdr, args->fh, &hdr);
2022         encode_locku(&xdr, args, &hdr);
2023         encode_nops(&hdr);
2024         return 0;
2025 }
2026
2027 /*
2028  * Encode a READLINK request
2029  */
2030 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2031 {
2032         struct xdr_stream xdr;
2033         struct compound_hdr hdr = {
2034                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2035         };
2036
2037         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2038         encode_compound_hdr(&xdr, req, &hdr);
2039         encode_sequence(&xdr, &args->seq_args, &hdr);
2040         encode_putfh(&xdr, args->fh, &hdr);
2041         encode_readlink(&xdr, args, req, &hdr);
2042
2043         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2044                         args->pgbase, args->pglen);
2045         encode_nops(&hdr);
2046         return 0;
2047 }
2048
2049 /*
2050  * Encode a READDIR request
2051  */
2052 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2053 {
2054         struct xdr_stream xdr;
2055         struct compound_hdr hdr = {
2056                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2057         };
2058
2059         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2060         encode_compound_hdr(&xdr, req, &hdr);
2061         encode_sequence(&xdr, &args->seq_args, &hdr);
2062         encode_putfh(&xdr, args->fh, &hdr);
2063         encode_readdir(&xdr, args, req, &hdr);
2064
2065         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2066                          args->pgbase, args->count);
2067         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2068                         __func__, hdr.replen << 2, args->pages,
2069                         args->pgbase, args->count);
2070         encode_nops(&hdr);
2071         return 0;
2072 }
2073
2074 /*
2075  * Encode a READ request
2076  */
2077 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2078 {
2079         struct xdr_stream xdr;
2080         struct compound_hdr hdr = {
2081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082         };
2083
2084         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2085         encode_compound_hdr(&xdr, req, &hdr);
2086         encode_sequence(&xdr, &args->seq_args, &hdr);
2087         encode_putfh(&xdr, args->fh, &hdr);
2088         encode_read(&xdr, args, &hdr);
2089
2090         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2091                          args->pages, args->pgbase, args->count);
2092         req->rq_rcv_buf.flags |= XDRBUF_READ;
2093         encode_nops(&hdr);
2094         return 0;
2095 }
2096
2097 /*
2098  * Encode an SETATTR request
2099  */
2100 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2101 {
2102         struct xdr_stream xdr;
2103         struct compound_hdr hdr = {
2104                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2105         };
2106
2107         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2108         encode_compound_hdr(&xdr, req, &hdr);
2109         encode_sequence(&xdr, &args->seq_args, &hdr);
2110         encode_putfh(&xdr, args->fh, &hdr);
2111         encode_setattr(&xdr, args, args->server, &hdr);
2112         encode_getfattr(&xdr, args->bitmask, &hdr);
2113         encode_nops(&hdr);
2114         return 0;
2115 }
2116
2117 /*
2118  * Encode a GETACL request
2119  */
2120 static int
2121 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2122                 struct nfs_getaclargs *args)
2123 {
2124         struct xdr_stream xdr;
2125         struct compound_hdr hdr = {
2126                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2127         };
2128         uint32_t replen;
2129
2130         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2131         encode_compound_hdr(&xdr, req, &hdr);
2132         encode_sequence(&xdr, &args->seq_args, &hdr);
2133         encode_putfh(&xdr, args->fh, &hdr);
2134         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2135         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2136
2137         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2138                 args->acl_pages, args->acl_pgbase, args->acl_len);
2139         encode_nops(&hdr);
2140         return 0;
2141 }
2142
2143 /*
2144  * Encode a WRITE request
2145  */
2146 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2147 {
2148         struct xdr_stream xdr;
2149         struct compound_hdr hdr = {
2150                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2151         };
2152
2153         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2154         encode_compound_hdr(&xdr, req, &hdr);
2155         encode_sequence(&xdr, &args->seq_args, &hdr);
2156         encode_putfh(&xdr, args->fh, &hdr);
2157         encode_write(&xdr, args, &hdr);
2158         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2159         encode_getfattr(&xdr, args->bitmask, &hdr);
2160         encode_nops(&hdr);
2161         return 0;
2162 }
2163
2164 /*
2165  *  a COMMIT request
2166  */
2167 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2168 {
2169         struct xdr_stream xdr;
2170         struct compound_hdr hdr = {
2171                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2172         };
2173
2174         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2175         encode_compound_hdr(&xdr, req, &hdr);
2176         encode_sequence(&xdr, &args->seq_args, &hdr);
2177         encode_putfh(&xdr, args->fh, &hdr);
2178         encode_commit(&xdr, args, &hdr);
2179         encode_getfattr(&xdr, args->bitmask, &hdr);
2180         encode_nops(&hdr);
2181         return 0;
2182 }
2183
2184 /*
2185  * FSINFO request
2186  */
2187 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2188 {
2189         struct xdr_stream xdr;
2190         struct compound_hdr hdr = {
2191                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2192         };
2193
2194         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2195         encode_compound_hdr(&xdr, req, &hdr);
2196         encode_sequence(&xdr, &args->seq_args, &hdr);
2197         encode_putfh(&xdr, args->fh, &hdr);
2198         encode_fsinfo(&xdr, args->bitmask, &hdr);
2199         encode_nops(&hdr);
2200         return 0;
2201 }
2202
2203 /*
2204  * a PATHCONF request
2205  */
2206 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2207 {
2208         struct xdr_stream xdr;
2209         struct compound_hdr hdr = {
2210                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211         };
2212
2213         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2214         encode_compound_hdr(&xdr, req, &hdr);
2215         encode_sequence(&xdr, &args->seq_args, &hdr);
2216         encode_putfh(&xdr, args->fh, &hdr);
2217         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2218                            &hdr);
2219         encode_nops(&hdr);
2220         return 0;
2221 }
2222
2223 /*
2224  * a STATFS request
2225  */
2226 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2227 {
2228         struct xdr_stream xdr;
2229         struct compound_hdr hdr = {
2230                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231         };
2232
2233         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2234         encode_compound_hdr(&xdr, req, &hdr);
2235         encode_sequence(&xdr, &args->seq_args, &hdr);
2236         encode_putfh(&xdr, args->fh, &hdr);
2237         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2238                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2239         encode_nops(&hdr);
2240         return 0;
2241 }
2242
2243 /*
2244  * GETATTR_BITMAP request
2245  */
2246 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2247                                     struct nfs4_server_caps_arg *args)
2248 {
2249         struct xdr_stream xdr;
2250         struct compound_hdr hdr = {
2251                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2252         };
2253
2254         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2255         encode_compound_hdr(&xdr, req, &hdr);
2256         encode_sequence(&xdr, &args->seq_args, &hdr);
2257         encode_putfh(&xdr, args->fhandle, &hdr);
2258         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2259                            FATTR4_WORD0_LINK_SUPPORT|
2260                            FATTR4_WORD0_SYMLINK_SUPPORT|
2261                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2262         encode_nops(&hdr);
2263         return 0;
2264 }
2265
2266 /*
2267  * a RENEW request
2268  */
2269 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2270 {
2271         struct xdr_stream xdr;
2272         struct compound_hdr hdr = {
2273                 .nops   = 0,
2274         };
2275
2276         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2277         encode_compound_hdr(&xdr, req, &hdr);
2278         encode_renew(&xdr, clp, &hdr);
2279         encode_nops(&hdr);
2280         return 0;
2281 }
2282
2283 /*
2284  * a SETCLIENTID request
2285  */
2286 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2287 {
2288         struct xdr_stream xdr;
2289         struct compound_hdr hdr = {
2290                 .nops   = 0,
2291         };
2292
2293         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2294         encode_compound_hdr(&xdr, req, &hdr);
2295         encode_setclientid(&xdr, sc, &hdr);
2296         encode_nops(&hdr);
2297         return 0;
2298 }
2299
2300 /*
2301  * a SETCLIENTID_CONFIRM request
2302  */
2303 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2304 {
2305         struct xdr_stream xdr;
2306         struct compound_hdr hdr = {
2307                 .nops   = 0,
2308         };
2309         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2310
2311         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2312         encode_compound_hdr(&xdr, req, &hdr);
2313         encode_setclientid_confirm(&xdr, clp, &hdr);
2314         encode_putrootfh(&xdr, &hdr);
2315         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2316         encode_nops(&hdr);
2317         return 0;
2318 }
2319
2320 /*
2321  * DELEGRETURN request
2322  */
2323 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2324 {
2325         struct xdr_stream xdr;
2326         struct compound_hdr hdr = {
2327                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2328         };
2329
2330         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2331         encode_compound_hdr(&xdr, req, &hdr);
2332         encode_sequence(&xdr, &args->seq_args, &hdr);
2333         encode_putfh(&xdr, args->fhandle, &hdr);
2334         encode_delegreturn(&xdr, args->stateid, &hdr);
2335         encode_getfattr(&xdr, args->bitmask, &hdr);
2336         encode_nops(&hdr);
2337         return 0;
2338 }
2339
2340 /*
2341  * Encode FS_LOCATIONS request
2342  */
2343 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2344 {
2345         struct xdr_stream xdr;
2346         struct compound_hdr hdr = {
2347                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2348         };
2349         uint32_t replen;
2350
2351         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2352         encode_compound_hdr(&xdr, req, &hdr);
2353         encode_sequence(&xdr, &args->seq_args, &hdr);
2354         encode_putfh(&xdr, args->dir_fh, &hdr);
2355         encode_lookup(&xdr, args->name, &hdr);
2356         replen = hdr.replen;    /* get the attribute into args->page */
2357         encode_fs_locations(&xdr, args->bitmask, &hdr);
2358
2359         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2360                         0, PAGE_SIZE);
2361         encode_nops(&hdr);
2362         return 0;
2363 }
2364
2365 #if defined(CONFIG_NFS_V4_1)
2366 /*
2367  * EXCHANGE_ID request
2368  */
2369 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2370                                     struct nfs41_exchange_id_args *args)
2371 {
2372         struct xdr_stream xdr;
2373         struct compound_hdr hdr = {
2374                 .minorversion = args->client->cl_minorversion,
2375         };
2376
2377         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2378         encode_compound_hdr(&xdr, req, &hdr);
2379         encode_exchange_id(&xdr, args, &hdr);
2380         encode_nops(&hdr);
2381         return 0;
2382 }
2383
2384 /*
2385  * a CREATE_SESSION request
2386  */
2387 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2388                                        struct nfs41_create_session_args *args)
2389 {
2390         struct xdr_stream xdr;
2391         struct compound_hdr hdr = {
2392                 .minorversion = args->client->cl_minorversion,
2393         };
2394
2395         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2396         encode_compound_hdr(&xdr, req, &hdr);
2397         encode_create_session(&xdr, args, &hdr);
2398         encode_nops(&hdr);
2399         return 0;
2400 }
2401
2402 /*
2403  * a DESTROY_SESSION request
2404  */
2405 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2406                                         struct nfs4_session *session)
2407 {
2408         struct xdr_stream xdr;
2409         struct compound_hdr hdr = {
2410                 .minorversion = session->clp->cl_minorversion,
2411         };
2412
2413         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2414         encode_compound_hdr(&xdr, req, &hdr);
2415         encode_destroy_session(&xdr, session, &hdr);
2416         encode_nops(&hdr);
2417         return 0;
2418 }
2419
2420 /*
2421  * a SEQUENCE request
2422  */
2423 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2424                                  struct nfs4_sequence_args *args)
2425 {
2426         struct xdr_stream xdr;
2427         struct compound_hdr hdr = {
2428                 .minorversion = nfs4_xdr_minorversion(args),
2429         };
2430
2431         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2432         encode_compound_hdr(&xdr, req, &hdr);
2433         encode_sequence(&xdr, args, &hdr);
2434         encode_nops(&hdr);
2435         return 0;
2436 }
2437
2438 /*
2439  * a GET_LEASE_TIME request
2440  */
2441 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2442                                        struct nfs4_get_lease_time_args *args)
2443 {
2444         struct xdr_stream xdr;
2445         struct compound_hdr hdr = {
2446                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2447         };
2448         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2449
2450         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2451         encode_compound_hdr(&xdr, req, &hdr);
2452         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2453         encode_putrootfh(&xdr, &hdr);
2454         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2455         encode_nops(&hdr);
2456         return 0;
2457 }
2458 #endif /* CONFIG_NFS_V4_1 */
2459
2460 /*
2461  * START OF "GENERIC" DECODE ROUTINES.
2462  *   These may look a little ugly since they are imported from a "generic"
2463  * set of XDR encode/decode routines which are intended to be shared by
2464  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2465  *
2466  * If the pain of reading these is too great, it should be a straightforward
2467  * task to translate them into Linux-specific versions which are more
2468  * consistent with the style used in NFSv2/v3...
2469  */
2470 #define READ32(x)         (x) = ntohl(*p++)
2471 #define READ64(x)         do {                  \
2472         (x) = (u64)ntohl(*p++) << 32;           \
2473         (x) |= ntohl(*p++);                     \
2474 } while (0)
2475 #define READTIME(x)       do {                  \
2476         p++;                                    \
2477         (x.tv_sec) = ntohl(*p++);               \
2478         (x.tv_nsec) = ntohl(*p++);              \
2479 } while (0)
2480 #define COPYMEM(x,nbytes) do {                  \
2481         memcpy((x), p, nbytes);                 \
2482         p += XDR_QUADLEN(nbytes);               \
2483 } while (0)
2484
2485 #define READ_BUF(nbytes)  do { \
2486         p = xdr_inline_decode(xdr, nbytes); \
2487         if (unlikely(!p)) { \
2488                 dprintk("nfs: %s: prematurely hit end of receive" \
2489                                 " buffer\n", __func__); \
2490                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2491                                 __func__, xdr->p, nbytes, xdr->end); \
2492                 return -EIO; \
2493         } \
2494 } while (0)
2495
2496 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2497 {
2498         __be32 *p;
2499
2500         READ_BUF(4);
2501         READ32(*len);
2502         READ_BUF(*len);
2503         *string = (char *)p;
2504         return 0;
2505 }
2506
2507 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2508 {
2509         __be32 *p;
2510
2511         READ_BUF(8);
2512         READ32(hdr->status);
2513         READ32(hdr->taglen);
2514
2515         READ_BUF(hdr->taglen + 4);
2516         hdr->tag = (char *)p;
2517         p += XDR_QUADLEN(hdr->taglen);
2518         READ32(hdr->nops);
2519         if (unlikely(hdr->nops < 1))
2520                 return nfs4_stat_to_errno(hdr->status);
2521         return 0;
2522 }
2523
2524 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2525 {
2526         __be32 *p;
2527         uint32_t opnum;
2528         int32_t nfserr;
2529
2530         READ_BUF(8);
2531         READ32(opnum);
2532         if (opnum != expected) {
2533                 dprintk("nfs: Server returned operation"
2534                         " %d but we issued a request for %d\n",
2535                                 opnum, expected);
2536                 return -EIO;
2537         }
2538         READ32(nfserr);
2539         if (nfserr != NFS_OK)
2540                 return nfs4_stat_to_errno(nfserr);
2541         return 0;
2542 }
2543
2544 /* Dummy routine */
2545 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2546 {
2547         __be32 *p;
2548         unsigned int strlen;
2549         char *str;
2550
2551         READ_BUF(12);
2552         return decode_opaque_inline(xdr, &strlen, &str);
2553 }
2554
2555 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2556 {
2557         uint32_t bmlen;
2558         __be32 *p;
2559
2560         READ_BUF(4);
2561         READ32(bmlen);
2562
2563         bitmap[0] = bitmap[1] = 0;
2564         READ_BUF((bmlen << 2));
2565         if (bmlen > 0) {
2566                 READ32(bitmap[0]);
2567                 if (bmlen > 1)
2568                         READ32(bitmap[1]);
2569         }
2570         return 0;
2571 }
2572
2573 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2574 {
2575         __be32 *p;
2576
2577         READ_BUF(4);
2578         READ32(*attrlen);
2579         *savep = xdr->p;
2580         return 0;
2581 }
2582
2583 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2584 {
2585         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2586                 decode_attr_bitmap(xdr, bitmask);
2587                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2588         } else
2589                 bitmask[0] = bitmask[1] = 0;
2590         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2591         return 0;
2592 }
2593
2594 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2595 {
2596         __be32 *p;
2597         int ret = 0;
2598
2599         *type = 0;
2600         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2601                 return -EIO;
2602         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2603                 READ_BUF(4);
2604                 READ32(*type);
2605                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2606                         dprintk("%s: bad type %d\n", __func__, *type);
2607                         return -EIO;
2608                 }
2609                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2610                 ret = NFS_ATTR_FATTR_TYPE;
2611         }
2612         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2613         return ret;
2614 }
2615
2616 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2617 {
2618         __be32 *p;
2619         int ret = 0;
2620
2621         *change = 0;
2622         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2623                 return -EIO;
2624         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2625                 READ_BUF(8);
2626                 READ64(*change);
2627                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2628                 ret = NFS_ATTR_FATTR_CHANGE;
2629         }
2630         dprintk("%s: change attribute=%Lu\n", __func__,
2631                         (unsigned long long)*change);
2632         return ret;
2633 }
2634
2635 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2636 {
2637         __be32 *p;
2638         int ret = 0;
2639
2640         *size = 0;
2641         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2642                 return -EIO;
2643         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2644                 READ_BUF(8);
2645                 READ64(*size);
2646                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2647                 ret = NFS_ATTR_FATTR_SIZE;
2648         }
2649         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2650         return ret;
2651 }
2652
2653 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2654 {
2655         __be32 *p;
2656
2657         *res = 0;
2658         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2659                 return -EIO;
2660         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2661                 READ_BUF(4);
2662                 READ32(*res);
2663                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2664         }
2665         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2666         return 0;
2667 }
2668
2669 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2670 {
2671         __be32 *p;
2672
2673         *res = 0;
2674         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2675                 return -EIO;
2676         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2677                 READ_BUF(4);
2678                 READ32(*res);
2679                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2680         }
2681         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2682         return 0;
2683 }
2684
2685 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2686 {
2687         __be32 *p;
2688         int ret = 0;
2689
2690         fsid->major = 0;
2691         fsid->minor = 0;
2692         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2693                 return -EIO;
2694         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2695                 READ_BUF(16);
2696                 READ64(fsid->major);
2697                 READ64(fsid->minor);
2698                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2699                 ret = NFS_ATTR_FATTR_FSID;
2700         }
2701         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2702                         (unsigned long long)fsid->major,
2703                         (unsigned long long)fsid->minor);
2704         return ret;
2705 }
2706
2707 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2708 {
2709         __be32 *p;
2710
2711         *res = 60;
2712         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2713                 return -EIO;
2714         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2715                 READ_BUF(4);
2716                 READ32(*res);
2717                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2718         }
2719         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2720         return 0;
2721 }
2722
2723 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2724 {
2725         __be32 *p;
2726
2727         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2728         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2729                 return -EIO;
2730         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2731                 READ_BUF(4);
2732                 READ32(*res);
2733                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2734         }
2735         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2736         return 0;
2737 }
2738
2739 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2740 {
2741         __be32 *p;
2742         int ret = 0;
2743
2744         *fileid = 0;
2745         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2746                 return -EIO;
2747         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2748                 READ_BUF(8);
2749                 READ64(*fileid);
2750                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2751                 ret = NFS_ATTR_FATTR_FILEID;
2752         }
2753         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2754         return ret;
2755 }
2756
2757 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2758 {
2759         __be32 *p;
2760         int ret = 0;
2761
2762         *fileid = 0;
2763         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2764                 return -EIO;
2765         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2766                 READ_BUF(8);
2767                 READ64(*fileid);
2768                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2769                 ret = NFS_ATTR_FATTR_FILEID;
2770         }
2771         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2772         return ret;
2773 }
2774
2775 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2776 {
2777         __be32 *p;
2778         int status = 0;
2779
2780         *res = 0;
2781         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2782                 return -EIO;
2783         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2784                 READ_BUF(8);
2785                 READ64(*res);
2786                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2787         }
2788         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2789         return status;
2790 }
2791
2792 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2793 {
2794         __be32 *p;
2795         int status = 0;
2796
2797         *res = 0;
2798         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2799                 return -EIO;
2800         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2801                 READ_BUF(8);
2802                 READ64(*res);
2803                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2804         }
2805         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2806         return status;
2807 }
2808
2809 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2810 {
2811         __be32 *p;
2812         int status = 0;
2813
2814         *res = 0;
2815         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2816                 return -EIO;
2817         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2818                 READ_BUF(8);
2819                 READ64(*res);
2820                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2821         }
2822         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2823         return status;
2824 }
2825
2826 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2827 {
2828         u32 n;
2829         __be32 *p;
2830         int status = 0;
2831
2832         READ_BUF(4);
2833         READ32(n);
2834         if (n == 0)
2835                 goto root_path;
2836         dprintk("path ");
2837         path->ncomponents = 0;
2838         while (path->ncomponents < n) {
2839                 struct nfs4_string *component = &path->components[path->ncomponents];
2840                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2841                 if (unlikely(status != 0))
2842                         goto out_eio;
2843                 if (path->ncomponents != n)
2844                         dprintk("/");
2845                 dprintk("%s", component->data);
2846                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2847                         path->ncomponents++;
2848                 else {
2849                         dprintk("cannot parse %d components in path\n", n);
2850                         goto out_eio;
2851                 }
2852         }
2853 out:
2854         dprintk("\n");
2855         return status;
2856 root_path:
2857 /* a root pathname is sent as a zero component4 */
2858         path->ncomponents = 1;
2859         path->components[0].len=0;
2860         path->components[0].data=NULL;
2861         dprintk("path /\n");
2862         goto out;
2863 out_eio:
2864         dprintk(" status %d", status);
2865         status = -EIO;
2866         goto out;
2867 }
2868
2869 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2870 {
2871         int n;
2872         __be32 *p;
2873         int status = -EIO;
2874
2875         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2876                 goto out;
2877         status = 0;
2878         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2879                 goto out;
2880         dprintk("%s: fsroot ", __func__);
2881         status = decode_pathname(xdr, &res->fs_path);
2882         if (unlikely(status != 0))
2883                 goto out;
2884         READ_BUF(4);
2885         READ32(n);
2886         if (n <= 0)
2887                 goto out_eio;
2888         res->nlocations = 0;
2889         while (res->nlocations < n) {
2890                 u32 m;
2891                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2892
2893                 READ_BUF(4);
2894                 READ32(m);
2895
2896                 loc->nservers = 0;
2897                 dprintk("%s: servers ", __func__);
2898                 while (loc->nservers < m) {
2899                         struct nfs4_string *server = &loc->servers[loc->nservers];
2900                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2901                         if (unlikely(status != 0))
2902                                 goto out_eio;
2903                         dprintk("%s ", server->data);
2904                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2905                                 loc->nservers++;
2906                         else {
2907                                 unsigned int i;
2908                                 dprintk("%s: using first %u of %u servers "
2909                                         "returned for location %u\n",
2910                                                 __func__,
2911                                                 NFS4_FS_LOCATION_MAXSERVERS,
2912                                                 m, res->nlocations);
2913                                 for (i = loc->nservers; i < m; i++) {
2914                                         unsigned int len;
2915                                         char *data;
2916                                         status = decode_opaque_inline(xdr, &len, &data);
2917                                         if (unlikely(status != 0))
2918                                                 goto out_eio;
2919                                 }
2920                         }
2921                 }
2922                 status = decode_pathname(xdr, &loc->rootpath);
2923                 if (unlikely(status != 0))
2924                         goto out_eio;
2925                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2926                         res->nlocations++;
2927         }
2928         if (res->nlocations != 0)
2929                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2930 out:
2931         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2932         return status;
2933 out_eio:
2934         status = -EIO;
2935         goto out;
2936 }
2937
2938 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2939 {
2940         __be32 *p;
2941         int status = 0;
2942
2943         *res = 0;
2944         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2945                 return -EIO;
2946         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2947                 READ_BUF(8);
2948                 READ64(*res);
2949                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2950         }
2951         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2952         return status;
2953 }
2954
2955 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2956 {
2957         __be32 *p;
2958         int status = 0;
2959
2960         *maxlink = 1;
2961         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2962                 return -EIO;
2963         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2964                 READ_BUF(4);
2965                 READ32(*maxlink);
2966                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2967         }
2968         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2969         return status;
2970 }
2971
2972 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2973 {
2974         __be32 *p;
2975         int status = 0;
2976
2977         *maxname = 1024;
2978         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2979                 return -EIO;
2980         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2981                 READ_BUF(4);
2982                 READ32(*maxname);
2983                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2984         }
2985         dprintk("%s: maxname=%u\n", __func__, *maxname);
2986         return status;
2987 }
2988
2989 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2990 {
2991         __be32 *p;
2992         int status = 0;
2993
2994         *res = 1024;
2995         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2996                 return -EIO;
2997         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2998                 uint64_t maxread;
2999                 READ_BUF(8);
3000                 READ64(maxread);
3001                 if (maxread > 0x7FFFFFFF)
3002                         maxread = 0x7FFFFFFF;
3003                 *res = (uint32_t)maxread;
3004                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3005         }
3006         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3007         return status;
3008 }
3009
3010 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3011 {
3012         __be32 *p;
3013         int status = 0;
3014
3015         *res = 1024;
3016         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3017                 return -EIO;
3018         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3019                 uint64_t maxwrite;
3020                 READ_BUF(8);
3021                 READ64(maxwrite);
3022                 if (maxwrite > 0x7FFFFFFF)
3023                         maxwrite = 0x7FFFFFFF;
3024                 *res = (uint32_t)maxwrite;
3025                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3026         }
3027         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3028         return status;
3029 }
3030
3031 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3032 {
3033         uint32_t tmp;
3034         __be32 *p;
3035         int ret = 0;
3036
3037         *mode = 0;
3038         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3039                 return -EIO;
3040         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3041                 READ_BUF(4);
3042                 READ32(tmp);
3043                 *mode = tmp & ~S_IFMT;
3044                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3045                 ret = NFS_ATTR_FATTR_MODE;
3046         }
3047         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3048         return ret;
3049 }
3050
3051 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3052 {
3053         __be32 *p;
3054         int ret = 0;
3055
3056         *nlink = 1;
3057         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3058                 return -EIO;
3059         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3060                 READ_BUF(4);
3061                 READ32(*nlink);
3062                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3063                 ret = NFS_ATTR_FATTR_NLINK;
3064         }
3065         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3066         return ret;
3067 }
3068
3069 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3070 {
3071         uint32_t len;
3072         __be32 *p;
3073         int ret = 0;
3074
3075         *uid = -2;
3076         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3077                 return -EIO;
3078         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3079                 READ_BUF(4);
3080                 READ32(len);
3081                 READ_BUF(len);
3082                 if (len < XDR_MAX_NETOBJ) {
3083                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3084                                 ret = NFS_ATTR_FATTR_OWNER;
3085                         else
3086                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3087                                                 __func__);
3088                 } else
3089                         dprintk("%s: name too long (%u)!\n",
3090                                         __func__, len);
3091                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3092         }
3093         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3094         return ret;
3095 }
3096
3097 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3098 {
3099         uint32_t len;
3100         __be32 *p;
3101         int ret = 0;
3102
3103         *gid = -2;
3104         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3105                 return -EIO;
3106         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3107                 READ_BUF(4);
3108                 READ32(len);
3109                 READ_BUF(len);
3110                 if (len < XDR_MAX_NETOBJ) {
3111                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3112                                 ret = NFS_ATTR_FATTR_GROUP;
3113                         else
3114                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3115                                                 __func__);
3116                 } else
3117                         dprintk("%s: name too long (%u)!\n",
3118                                         __func__, len);
3119                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3120         }
3121         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3122         return ret;
3123 }
3124
3125 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3126 {
3127         uint32_t major = 0, minor = 0;
3128         __be32 *p;
3129         int ret = 0;
3130
3131         *rdev = MKDEV(0,0);
3132         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3133                 return -EIO;
3134         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3135                 dev_t tmp;
3136
3137                 READ_BUF(8);
3138                 READ32(major);
3139                 READ32(minor);
3140                 tmp = MKDEV(major, minor);
3141                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3142                         *rdev = tmp;
3143                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3144                 ret = NFS_ATTR_FATTR_RDEV;
3145         }
3146         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3147         return ret;
3148 }
3149
3150 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3151 {
3152         __be32 *p;
3153         int status = 0;
3154
3155         *res = 0;
3156         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3157                 return -EIO;
3158         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3159                 READ_BUF(8);
3160                 READ64(*res);
3161                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3162         }
3163         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3164         return status;
3165 }
3166
3167 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3168 {
3169         __be32 *p;
3170         int status = 0;
3171
3172         *res = 0;
3173         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3174                 return -EIO;
3175         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3176                 READ_BUF(8);
3177                 READ64(*res);
3178                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3179         }
3180         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3181         return status;
3182 }
3183
3184 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3185 {
3186         __be32 *p;
3187         int status = 0;
3188
3189         *res = 0;
3190         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3191                 return -EIO;
3192         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3193                 READ_BUF(8);
3194                 READ64(*res);
3195                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3196         }
3197         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3198         return status;
3199 }
3200
3201 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3202 {
3203         __be32 *p;
3204         int ret = 0;
3205
3206         *used = 0;
3207         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3208                 return -EIO;
3209         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3210                 READ_BUF(8);
3211                 READ64(*used);
3212                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3213                 ret = NFS_ATTR_FATTR_SPACE_USED;
3214         }
3215         dprintk("%s: space used=%Lu\n", __func__,
3216                         (unsigned long long)*used);
3217         return ret;
3218 }
3219
3220 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3221 {
3222         __be32 *p;
3223         uint64_t sec;
3224         uint32_t nsec;
3225
3226         READ_BUF(12);
3227         READ64(sec);
3228         READ32(nsec);
3229         time->tv_sec = (time_t)sec;
3230         time->tv_nsec = (long)nsec;
3231         return 0;
3232 }
3233
3234 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3235 {
3236         int status = 0;
3237
3238         time->tv_sec = 0;
3239         time->tv_nsec = 0;
3240         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3241                 return -EIO;
3242         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3243                 status = decode_attr_time(xdr, time);
3244                 if (status == 0)
3245                         status = NFS_ATTR_FATTR_ATIME;
3246                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3247         }
3248         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3249         return status;
3250 }
3251
3252 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3253 {
3254         int status = 0;
3255
3256         time->tv_sec = 0;
3257         time->tv_nsec = 0;
3258         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3259                 return -EIO;
3260         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3261                 status = decode_attr_time(xdr, time);
3262                 if (status == 0)
3263                         status = NFS_ATTR_FATTR_CTIME;
3264                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3265         }
3266         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3267         return status;
3268 }
3269
3270 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3271 {
3272         int status = 0;
3273
3274         time->tv_sec = 0;
3275         time->tv_nsec = 0;
3276         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3277                 return -EIO;
3278         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3279                 status = decode_attr_time(xdr, time);
3280                 if (status == 0)
3281                         status = NFS_ATTR_FATTR_MTIME;
3282                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3283         }
3284         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3285         return status;
3286 }
3287
3288 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3289 {
3290         unsigned int attrwords = XDR_QUADLEN(attrlen);
3291         unsigned int nwords = xdr->p - savep;
3292
3293         if (unlikely(attrwords != nwords)) {
3294                 dprintk("%s: server returned incorrect attribute length: "
3295                         "%u %c %u\n",
3296                                 __func__,
3297                                 attrwords << 2,
3298                                 (attrwords < nwords) ? '<' : '>',
3299                                 nwords << 2);
3300                 return -EIO;
3301         }
3302         return 0;
3303 }
3304
3305 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3306 {
3307         __be32 *p;
3308
3309         READ_BUF(20);
3310         READ32(cinfo->atomic);
3311         READ64(cinfo->before);
3312         READ64(cinfo->after);
3313         return 0;
3314 }
3315
3316 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3317 {
3318         __be32 *p;
3319         uint32_t supp, acc;
3320         int status;
3321
3322         status = decode_op_hdr(xdr, OP_ACCESS);
3323         if (status)
3324                 return status;
3325         READ_BUF(8);
3326         READ32(supp);
3327         READ32(acc);
3328         access->supported = supp;
3329         access->access = acc;
3330         return 0;
3331 }
3332
3333 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3334 {
3335         __be32 *p;
3336         int status;
3337
3338         status = decode_op_hdr(xdr, OP_CLOSE);
3339         if (status != -EIO)
3340                 nfs_increment_open_seqid(status, res->seqid);
3341         if (status)
3342                 return status;
3343         READ_BUF(NFS4_STATEID_SIZE);
3344         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3345         return 0;
3346 }
3347
3348 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3349 {
3350         __be32 *p;
3351         int status;
3352
3353         status = decode_op_hdr(xdr, OP_COMMIT);
3354         if (status)
3355                 return status;
3356         READ_BUF(8);
3357         COPYMEM(res->verf->verifier, 8);
3358         return 0;
3359 }
3360
3361 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3362 {
3363         __be32 *p;
3364         uint32_t bmlen;
3365         int status;
3366
3367         status = decode_op_hdr(xdr, OP_CREATE);
3368         if (status)
3369                 return status;
3370         if ((status = decode_change_info(xdr, cinfo)))
3371                 return status;
3372         READ_BUF(4);
3373         READ32(bmlen);
3374         READ_BUF(bmlen << 2);
3375         return 0;
3376 }
3377
3378 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3379 {
3380         __be32 *savep;
3381         uint32_t attrlen, bitmap[2] = {0};
3382         int status;
3383
3384         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3385                 goto xdr_error;
3386         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3387                 goto xdr_error;
3388         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3389                 goto xdr_error;
3390         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3391                 goto xdr_error;
3392         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3393                 goto xdr_error;
3394         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3395                 goto xdr_error;
3396         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3397                 goto xdr_error;
3398         status = verify_attr_len(xdr, savep, attrlen);
3399 xdr_error:
3400         dprintk("%s: xdr returned %d!\n", __func__, -status);
3401         return status;
3402 }
3403
3404 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3405 {
3406         __be32 *savep;
3407         uint32_t attrlen, bitmap[2] = {0};
3408         int status;
3409
3410         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3411                 goto xdr_error;
3412         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3413                 goto xdr_error;
3414         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3415                 goto xdr_error;
3416
3417         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3418                 goto xdr_error;
3419         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3420                 goto xdr_error;
3421         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3422                 goto xdr_error;
3423         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3424                 goto xdr_error;
3425         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3426                 goto xdr_error;
3427         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3428                 goto xdr_error;
3429
3430         status = verify_attr_len(xdr, savep, attrlen);
3431 xdr_error:
3432         dprintk("%s: xdr returned %d!\n", __func__, -status);
3433         return status;
3434 }
3435
3436 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3437 {
3438         __be32 *savep;
3439         uint32_t attrlen, bitmap[2] = {0};
3440         int status;
3441
3442         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3443                 goto xdr_error;
3444         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3445                 goto xdr_error;
3446         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3447                 goto xdr_error;
3448
3449         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3450                 goto xdr_error;
3451         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3452                 goto xdr_error;
3453
3454         status = verify_attr_len(xdr, savep, attrlen);
3455 xdr_error:
3456         dprintk("%s: xdr returned %d!\n", __func__, -status);
3457         return status;
3458 }
3459
3460 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3461 {
3462         __be32 *savep;
3463         uint32_t attrlen,
3464                  bitmap[2] = {0},
3465                  type;
3466         int status;
3467         umode_t fmode = 0;
3468         uint64_t fileid;
3469
3470         status = decode_op_hdr(xdr, OP_GETATTR);
3471         if (status < 0)
3472                 goto xdr_error;
3473
3474         status = decode_attr_bitmap(xdr, bitmap);
3475         if (status < 0)
3476                 goto xdr_error;
3477
3478         status = decode_attr_length(xdr, &attrlen, &savep);
3479         if (status < 0)
3480                 goto xdr_error;
3481
3482
3483         status = decode_attr_type(xdr, bitmap, &type);
3484         if (status < 0)
3485                 goto xdr_error;
3486         fattr->mode = 0;
3487         if (status != 0) {
3488                 fattr->mode |= nfs_type2fmt[type];
3489                 fattr->valid |= status;
3490         }
3491
3492         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3493         if (status < 0)
3494                 goto xdr_error;
3495         fattr->valid |= status;
3496
3497         status = decode_attr_size(xdr, bitmap, &fattr->size);
3498         if (status < 0)
3499                 goto xdr_error;
3500         fattr->valid |= status;
3501
3502         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3503         if (status < 0)
3504                 goto xdr_error;
3505         fattr->valid |= status;
3506
3507         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3508         if (status < 0)
3509                 goto xdr_error;
3510         fattr->valid |= status;
3511
3512         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3513                                                 struct nfs4_fs_locations,
3514                                                 fattr));
3515         if (status < 0)
3516                 goto xdr_error;
3517         fattr->valid |= status;
3518
3519         status = decode_attr_mode(xdr, bitmap, &fmode);
3520         if (status < 0)
3521                 goto xdr_error;
3522         if (status != 0) {
3523                 fattr->mode |= fmode;
3524                 fattr->valid |= status;
3525         }
3526
3527         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3528         if (status < 0)
3529                 goto xdr_error;
3530         fattr->valid |= status;
3531
3532         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3533         if (status < 0)
3534                 goto xdr_error;
3535         fattr->valid |= status;
3536
3537         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3538         if (status < 0)
3539                 goto xdr_error;
3540         fattr->valid |= status;
3541
3542         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3543         if (status < 0)
3544                 goto xdr_error;
3545         fattr->valid |= status;
3546
3547         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3548         if (status < 0)
3549                 goto xdr_error;
3550         fattr->valid |= status;
3551
3552         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3553         if (status < 0)
3554                 goto xdr_error;
3555         fattr->valid |= status;
3556
3557         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3558         if (status < 0)
3559                 goto xdr_error;
3560         fattr->valid |= status;
3561
3562         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3563         if (status < 0)
3564                 goto xdr_error;
3565         fattr->valid |= status;
3566
3567         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3568         if (status < 0)
3569                 goto xdr_error;
3570         if (status != 0 && !(fattr->valid & status)) {
3571                 fattr->fileid = fileid;
3572                 fattr->valid |= status;
3573         }
3574
3575         status = verify_attr_len(xdr, savep, attrlen);
3576 xdr_error:
3577         dprintk("%s: xdr returned %d\n", __func__, -status);
3578         return status;
3579 }
3580
3581
3582 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3583 {
3584         __be32 *savep;
3585         uint32_t attrlen, bitmap[2];
3586         int status;
3587
3588         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3589                 goto xdr_error;
3590         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3591                 goto xdr_error;
3592         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3593                 goto xdr_error;
3594
3595         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3596
3597         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3598                 goto xdr_error;
3599         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3600                 goto xdr_error;
3601         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3602                 goto xdr_error;
3603         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3604         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3605                 goto xdr_error;
3606         fsinfo->wtpref = fsinfo->wtmax;
3607
3608         status = verify_attr_len(xdr, savep, attrlen);
3609 xdr_error:
3610         dprintk("%s: xdr returned %d!\n", __func__, -status);
3611         return status;
3612 }
3613
3614 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3615 {
3616         __be32 *p;
3617         uint32_t len;
3618         int status;
3619
3620         /* Zero handle first to allow comparisons */
3621         memset(fh, 0, sizeof(*fh));
3622
3623         status = decode_op_hdr(xdr, OP_GETFH);
3624         if (status)
3625                 return status;
3626
3627         READ_BUF(4);
3628         READ32(len);
3629         if (len > NFS4_FHSIZE)
3630                 return -EIO;
3631         fh->size = len;
3632         READ_BUF(len);
3633         COPYMEM(fh->data, len);
3634         return 0;
3635 }
3636
3637 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3638 {
3639         int status;
3640
3641         status = decode_op_hdr(xdr, OP_LINK);
3642         if (status)
3643                 return status;
3644         return decode_change_info(xdr, cinfo);
3645 }
3646
3647 /*
3648  * We create the owner, so we know a proper owner.id length is 4.
3649  */
3650 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3651 {
3652         uint64_t offset, length, clientid;
3653         __be32 *p;
3654         uint32_t namelen, type;
3655
3656         READ_BUF(32);
3657         READ64(offset);
3658         READ64(length);
3659         READ32(type);
3660         if (fl != NULL) {
3661                 fl->fl_start = (loff_t)offset;
3662                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3663                 if (length == ~(uint64_t)0)
3664                         fl->fl_end = OFFSET_MAX;
3665                 fl->fl_type = F_WRLCK;
3666                 if (type & 1)
3667                         fl->fl_type = F_RDLCK;
3668                 fl->fl_pid = 0;
3669         }
3670         READ64(clientid);
3671         READ32(namelen);
3672         READ_BUF(namelen);
3673         return -NFS4ERR_DENIED;
3674 }
3675
3676 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3677 {
3678         __be32 *p;
3679         int status;
3680
3681         status = decode_op_hdr(xdr, OP_LOCK);
3682         if (status == -EIO)
3683                 goto out;
3684         if (status == 0) {
3685                 READ_BUF(NFS4_STATEID_SIZE);
3686                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3687         } else if (status == -NFS4ERR_DENIED)
3688                 status = decode_lock_denied(xdr, NULL);
3689         if (res->open_seqid != NULL)
3690                 nfs_increment_open_seqid(status, res->open_seqid);
3691         nfs_increment_lock_seqid(status, res->lock_seqid);
3692 out:
3693         return status;
3694 }
3695
3696 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3697 {
3698         int status;
3699         status = decode_op_hdr(xdr, OP_LOCKT);
3700         if (status == -NFS4ERR_DENIED)
3701                 return decode_lock_denied(xdr, res->denied);
3702         return status;
3703 }
3704
3705 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3706 {
3707         __be32 *p;
3708         int status;
3709
3710         status = decode_op_hdr(xdr, OP_LOCKU);
3711         if (status != -EIO)
3712                 nfs_increment_lock_seqid(status, res->seqid);
3713         if (status == 0) {
3714                 READ_BUF(NFS4_STATEID_SIZE);
3715                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3716         }
3717         return status;
3718 }
3719
3720 static int decode_lookup(struct xdr_stream *xdr)
3721 {
3722         return decode_op_hdr(xdr, OP_LOOKUP);
3723 }
3724
3725 /* This is too sick! */
3726 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3727 {
3728         __be32 *p;
3729         uint32_t limit_type, nblocks, blocksize;
3730
3731         READ_BUF(12);
3732         READ32(limit_type);
3733         switch (limit_type) {
3734         case 1:
3735                 READ64(*maxsize);
3736                 break;
3737         case 2:
3738                 READ32(nblocks);
3739                 READ32(blocksize);
3740                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3741         }
3742         return 0;
3743 }
3744
3745 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3746 {
3747         __be32 *p;
3748         uint32_t delegation_type;
3749
3750         READ_BUF(4);
3751         READ32(delegation_type);
3752         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3753                 res->delegation_type = 0;
3754                 return 0;
3755         }
3756         READ_BUF(NFS4_STATEID_SIZE+4);
3757         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3758         READ32(res->do_recall);
3759
3760         switch (delegation_type) {
3761         case NFS4_OPEN_DELEGATE_READ:
3762                 res->delegation_type = FMODE_READ;
3763                 break;
3764         case NFS4_OPEN_DELEGATE_WRITE:
3765                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3766                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3767                                 return -EIO;
3768         }
3769         return decode_ace(xdr, NULL, res->server->nfs_client);
3770 }
3771
3772 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3773 {
3774         __be32 *p;
3775         uint32_t savewords, bmlen, i;
3776         int status;
3777
3778         status = decode_op_hdr(xdr, OP_OPEN);
3779         if (status != -EIO)
3780                 nfs_increment_open_seqid(status, res->seqid);
3781         if (status)
3782                 return status;
3783         READ_BUF(NFS4_STATEID_SIZE);
3784         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3785
3786         decode_change_info(xdr, &res->cinfo);
3787
3788         READ_BUF(8);
3789         READ32(res->rflags);
3790         READ32(bmlen);
3791         if (bmlen > 10)
3792                 goto xdr_error;
3793
3794         READ_BUF(bmlen << 2);
3795         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3796         for (i = 0; i < savewords; ++i)
3797                 READ32(res->attrset[i]);
3798         for (; i < NFS4_BITMAP_SIZE; i++)
3799                 res->attrset[i] = 0;
3800
3801         return decode_delegation(xdr, res);
3802 xdr_error:
3803         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3804         return -EIO;
3805 }
3806
3807 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3808 {
3809         __be32 *p;
3810         int status;
3811
3812         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3813         if (status != -EIO)
3814                 nfs_increment_open_seqid(status, res->seqid);
3815         if (status)
3816                 return status;
3817         READ_BUF(NFS4_STATEID_SIZE);
3818         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3819         return 0;
3820 }
3821
3822 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3823 {
3824         __be32 *p;
3825         int status;
3826
3827         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3828         if (status != -EIO)
3829                 nfs_increment_open_seqid(status, res->seqid);
3830         if (status)
3831                 return status;
3832         READ_BUF(NFS4_STATEID_SIZE);
3833         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3834         return 0;
3835 }
3836
3837 static int decode_putfh(struct xdr_stream *xdr)
3838 {
3839         return decode_op_hdr(xdr, OP_PUTFH);
3840 }
3841
3842 static int decode_putrootfh(struct xdr_stream *xdr)
3843 {
3844         return decode_op_hdr(xdr, OP_PUTROOTFH);
3845 }
3846
3847 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3848 {
3849         struct kvec *iov = req->rq_rcv_buf.head;
3850         __be32 *p;
3851         uint32_t count, eof, recvd, hdrlen;
3852         int status;
3853
3854         status = decode_op_hdr(xdr, OP_READ);
3855         if (status)
3856                 return status;
3857         READ_BUF(8);
3858         READ32(eof);
3859         READ32(count);
3860         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3861         recvd = req->rq_rcv_buf.len - hdrlen;
3862         if (count > recvd) {
3863                 dprintk("NFS: server cheating in read reply: "
3864                                 "count %u > recvd %u\n", count, recvd);
3865                 count = recvd;
3866                 eof = 0;
3867         }
3868         xdr_read_pages(xdr, count);
3869         res->eof = eof;
3870         res->count = count;
3871         return 0;
3872 }
3873
3874 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3875 {
3876         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3877         struct page     *page = *rcvbuf->pages;
3878         struct kvec     *iov = rcvbuf->head;
3879         size_t          hdrlen;
3880         u32             recvd, pglen = rcvbuf->page_len;
3881         __be32          *end, *entry, *p, *kaddr;
3882         unsigned int    nr = 0;
3883         int             status;
3884
3885         status = decode_op_hdr(xdr, OP_READDIR);
3886         if (status)
3887                 return status;
3888         READ_BUF(8);
3889         COPYMEM(readdir->verifier.data, 8);
3890         dprintk("%s: verifier = %08x:%08x\n",
3891                         __func__,
3892                         ((u32 *)readdir->verifier.data)[0],
3893                         ((u32 *)readdir->verifier.data)[1]);
3894
3895
3896         hdrlen = (char *) p - (char *) iov->iov_base;
3897         recvd = rcvbuf->len - hdrlen;
3898         if (pglen > recvd)
3899                 pglen = recvd;
3900         xdr_read_pages(xdr, pglen);
3901
3902         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3903         kaddr = p = kmap_atomic(page, KM_USER0);
3904         end = p + ((pglen + readdir->pgbase) >> 2);
3905         entry = p;
3906
3907         /* Make sure the packet actually has a value_follows and EOF entry */
3908         if ((entry + 1) > end)
3909                 goto short_pkt;
3910
3911         for (; *p++; nr++) {
3912                 u32 len, attrlen, xlen;
3913                 if (end - p < 3)
3914                         goto short_pkt;
3915                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3916                 p += 2;                 /* cookie */
3917                 len = ntohl(*p++);      /* filename length */
3918                 if (len > NFS4_MAXNAMLEN) {
3919                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3920                                         len);
3921                         goto err_unmap;
3922                 }
3923                 xlen = XDR_QUADLEN(len);
3924                 if (end - p < xlen + 1)
3925                         goto short_pkt;
3926                 dprintk("filename = %*s\n", len, (char *)p);
3927                 p += xlen;
3928                 len = ntohl(*p++);      /* bitmap length */
3929                 if (end - p < len + 1)
3930                         goto short_pkt;
3931                 p += len;
3932                 attrlen = XDR_QUADLEN(ntohl(*p++));
3933                 if (end - p < attrlen + 2)
3934                         goto short_pkt;
3935                 p += attrlen;           /* attributes */
3936                 entry = p;
3937         }
3938         /*
3939          * Apparently some server sends responses that are a valid size, but
3940          * contain no entries, and have value_follows==0 and EOF==0. For
3941          * those, just set the EOF marker.
3942          */
3943         if (!nr && entry[1] == 0) {
3944                 dprintk("NFS: readdir reply truncated!\n");
3945                 entry[1] = 1;
3946         }
3947 out:
3948         kunmap_atomic(kaddr, KM_USER0);
3949         return 0;
3950 short_pkt:
3951         /*
3952          * When we get a short packet there are 2 possibilities. We can
3953          * return an error, or fix up the response to look like a valid
3954          * response and return what we have so far. If there are no
3955          * entries and the packet was short, then return -EIO. If there
3956          * are valid entries in the response, return them and pretend that
3957          * the call was successful, but incomplete. The caller can retry the
3958          * readdir starting at the last cookie.
3959          */
3960         dprintk("%s: short packet at entry %d\n", __func__, nr);
3961         entry[0] = entry[1] = 0;
3962         if (nr)
3963                 goto out;
3964 err_unmap:
3965         kunmap_atomic(kaddr, KM_USER0);
3966         return -errno_NFSERR_IO;
3967 }
3968
3969 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3970 {
3971         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3972         struct kvec *iov = rcvbuf->head;
3973         size_t hdrlen;
3974         u32 len, recvd;
3975         __be32 *p;
3976         char *kaddr;
3977         int status;
3978
3979         status = decode_op_hdr(xdr, OP_READLINK);
3980         if (status)
3981                 return status;
3982
3983         /* Convert length of symlink */
3984         READ_BUF(4);
3985         READ32(len);
3986         if (len >= rcvbuf->page_len || len <= 0) {
3987                 dprintk("nfs: server returned giant symlink!\n");
3988                 return -ENAMETOOLONG;
3989         }
3990         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3991         recvd = req->rq_rcv_buf.len - hdrlen;
3992         if (recvd < len) {
3993                 dprintk("NFS: server cheating in readlink reply: "
3994                                 "count %u > recvd %u\n", len, recvd);
3995                 return -EIO;
3996         }
3997         xdr_read_pages(xdr, len);
3998         /*
3999          * The XDR encode routine has set things up so that
4000          * the link text will be copied directly into the
4001          * buffer.  We just have to do overflow-checking,
4002          * and and null-terminate the text (the VFS expects
4003          * null-termination).
4004          */
4005         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4006         kaddr[len+rcvbuf->page_base] = '\0';
4007         kunmap_atomic(kaddr, KM_USER0);
4008         return 0;
4009 }
4010
4011 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4012 {
4013         int status;
4014
4015         status = decode_op_hdr(xdr, OP_REMOVE);
4016         if (status)
4017                 goto out;
4018         status = decode_change_info(xdr, cinfo);
4019 out:
4020         return status;
4021 }
4022
4023 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4024               struct nfs4_change_info *new_cinfo)
4025 {
4026         int status;
4027
4028         status = decode_op_hdr(xdr, OP_RENAME);
4029         if (status)
4030                 goto out;
4031         if ((status = decode_change_info(xdr, old_cinfo)))
4032                 goto out;
4033         status = decode_change_info(xdr, new_cinfo);
4034 out:
4035         return status;
4036 }
4037
4038 static int decode_renew(struct xdr_stream *xdr)
4039 {
4040         return decode_op_hdr(xdr, OP_RENEW);
4041 }
4042
4043 static int
4044 decode_restorefh(struct xdr_stream *xdr)
4045 {
4046         return decode_op_hdr(xdr, OP_RESTOREFH);
4047 }
4048
4049 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4050                 size_t *acl_len)
4051 {
4052         __be32 *savep;
4053         uint32_t attrlen,
4054                  bitmap[2] = {0};
4055         struct kvec *iov = req->rq_rcv_buf.head;
4056         int status;
4057
4058         *acl_len = 0;
4059         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4060                 goto out;
4061         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4062                 goto out;
4063         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4064                 goto out;
4065
4066         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4067                 return -EIO;
4068         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4069                 size_t hdrlen;
4070                 u32 recvd;
4071
4072                 /* We ignore &savep and don't do consistency checks on
4073                  * the attr length.  Let userspace figure it out.... */
4074                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4075                 recvd = req->rq_rcv_buf.len - hdrlen;
4076                 if (attrlen > recvd) {
4077                         dprintk("NFS: server cheating in getattr"
4078                                         " acl reply: attrlen %u > recvd %u\n",
4079                                         attrlen, recvd);
4080                         return -EINVAL;
4081                 }
4082                 xdr_read_pages(xdr, attrlen);
4083                 *acl_len = attrlen;
4084         } else
4085                 status = -EOPNOTSUPP;
4086
4087 out:
4088         return status;
4089 }
4090
4091 static int
4092 decode_savefh(struct xdr_stream *xdr)
4093 {
4094         return decode_op_hdr(xdr, OP_SAVEFH);
4095 }
4096
4097 static int decode_setattr(struct xdr_stream *xdr)
4098 {
4099         __be32 *p;
4100         uint32_t bmlen;
4101         int status;
4102
4103         status = decode_op_hdr(xdr, OP_SETATTR);
4104         if (status)
4105                 return status;
4106         READ_BUF(4);
4107         READ32(bmlen);
4108         READ_BUF(bmlen << 2);
4109         return 0;
4110 }
4111
4112 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4113 {
4114         __be32 *p;
4115         uint32_t opnum;
4116         int32_t nfserr;
4117
4118         READ_BUF(8);
4119         READ32(opnum);
4120         if (opnum != OP_SETCLIENTID) {
4121                 dprintk("nfs: decode_setclientid: Server returned operation"
4122                         " %d\n", opnum);
4123                 return -EIO;
4124         }
4125         READ32(nfserr);
4126         if (nfserr == NFS_OK) {
4127                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4128                 READ64(clp->cl_clientid);
4129                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4130         } else if (nfserr == NFSERR_CLID_INUSE) {
4131                 uint32_t len;
4132
4133                 /* skip netid string */
4134                 READ_BUF(4);
4135                 READ32(len);
4136                 READ_BUF(len);
4137
4138                 /* skip uaddr string */
4139                 READ_BUF(4);
4140                 READ32(len);
4141                 READ_BUF(len);
4142                 return -NFSERR_CLID_INUSE;
4143         } else
4144                 return nfs4_stat_to_errno(nfserr);
4145
4146         return 0;
4147 }
4148
4149 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4150 {
4151         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4152 }
4153
4154 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4155 {
4156         __be32 *p;
4157         int status;
4158
4159         status = decode_op_hdr(xdr, OP_WRITE);
4160         if (status)
4161                 return status;
4162
4163         READ_BUF(16);
4164         READ32(res->count);
4165         READ32(res->verf->committed);
4166         COPYMEM(res->verf->verifier, 8);
4167         return 0;
4168 }
4169
4170 static int decode_delegreturn(struct xdr_stream *xdr)
4171 {
4172         return decode_op_hdr(xdr, OP_DELEGRETURN);
4173 }
4174
4175 #if defined(CONFIG_NFS_V4_1)
4176 static int decode_exchange_id(struct xdr_stream *xdr,
4177                               struct nfs41_exchange_id_res *res)
4178 {
4179         __be32 *p;
4180         uint32_t dummy;
4181         int status;
4182         struct nfs_client *clp = res->client;
4183
4184         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4185         if (status)
4186                 return status;
4187
4188         READ_BUF(8);
4189         READ64(clp->cl_ex_clid);
4190         READ_BUF(12);
4191         READ32(clp->cl_seqid);
4192         READ32(clp->cl_exchange_flags);
4193
4194         /* We ask for SP4_NONE */
4195         READ32(dummy);
4196         if (dummy != SP4_NONE)
4197                 return -EIO;
4198
4199         /* Throw away minor_id */
4200         READ_BUF(8);
4201
4202         /* Throw away Major id */
4203         READ_BUF(4);
4204         READ32(dummy);
4205         READ_BUF(dummy);
4206
4207         /* Throw away server_scope */
4208         READ_BUF(4);
4209         READ32(dummy);
4210         READ_BUF(dummy);
4211
4212         /* Throw away Implementation id array */
4213         READ_BUF(4);
4214         READ32(dummy);
4215         READ_BUF(dummy);
4216
4217         return 0;
4218 }
4219
4220 static int decode_chan_attrs(struct xdr_stream *xdr,
4221                              struct nfs4_channel_attrs *attrs)
4222 {
4223         __be32 *p;
4224         u32 nr_attrs;
4225
4226         READ_BUF(28);
4227         READ32(attrs->headerpadsz);
4228         READ32(attrs->max_rqst_sz);
4229         READ32(attrs->max_resp_sz);
4230         READ32(attrs->max_resp_sz_cached);
4231         READ32(attrs->max_ops);
4232         READ32(attrs->max_reqs);
4233         READ32(nr_attrs);
4234         if (unlikely(nr_attrs > 1)) {
4235                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4236                         __func__, nr_attrs);
4237                 return -EINVAL;
4238         }
4239         if (nr_attrs == 1)
4240                 READ_BUF(4); /* skip rdma_attrs */
4241         return 0;
4242 }
4243
4244 static int decode_create_session(struct xdr_stream *xdr,
4245                                  struct nfs41_create_session_res *res)
4246 {
4247         __be32 *p;
4248         int status;
4249         struct nfs_client *clp = res->client;
4250         struct nfs4_session *session = clp->cl_session;
4251
4252         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4253
4254         if (status)
4255                 return status;
4256
4257         /* sessionid */
4258         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4259         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4260
4261         /* seqid, flags */
4262         READ_BUF(8);
4263         READ32(clp->cl_seqid);
4264         READ32(session->flags);
4265
4266         /* Channel attributes */
4267         status = decode_chan_attrs(xdr, &session->fc_attrs);
4268         if (!status)
4269                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4270         return status;
4271 }
4272
4273 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4274 {
4275         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4276 }
4277 #endif /* CONFIG_NFS_V4_1 */
4278
4279 static int decode_sequence(struct xdr_stream *xdr,
4280                            struct nfs4_sequence_res *res,
4281                            struct rpc_rqst *rqstp)
4282 {
4283 #if defined(CONFIG_NFS_V4_1)
4284         struct nfs4_slot *slot;
4285         struct nfs4_sessionid id;
4286         u32 dummy;
4287         int status;
4288         __be32 *p;
4289
4290         if (!res->sr_session)
4291                 return 0;
4292
4293         status = decode_op_hdr(xdr, OP_SEQUENCE);
4294         if (status)
4295                 goto out_err;
4296
4297         /*
4298          * If the server returns different values for sessionID, slotID or
4299          * sequence number, the server is looney tunes.
4300          */
4301         status = -ESERVERFAULT;
4302
4303         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4304         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4305         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4306         if (memcmp(id.data, res->sr_session->sess_id.data,
4307                    NFS4_MAX_SESSIONID_LEN)) {
4308                 dprintk("%s Invalid session id\n", __func__);
4309                 goto out_err;
4310         }
4311         /* seqid */
4312         READ32(dummy);
4313         if (dummy != slot->seq_nr) {
4314                 dprintk("%s Invalid sequence number\n", __func__);
4315                 goto out_err;
4316         }
4317         /* slot id */
4318         READ32(dummy);
4319         if (dummy != res->sr_slotid) {
4320                 dprintk("%s Invalid slot id\n", __func__);
4321                 goto out_err;
4322         }
4323         /* highest slot id - currently not processed */
4324         READ32(dummy);
4325         /* target highest slot id - currently not processed */
4326         READ32(dummy);
4327         /* result flags - currently not processed */
4328         READ32(dummy);
4329         status = 0;
4330 out_err:
4331         res->sr_status = status;
4332         return status;
4333 #else  /* CONFIG_NFS_V4_1 */
4334         return 0;
4335 #endif /* CONFIG_NFS_V4_1 */
4336 }
4337
4338 /*
4339  * END OF "GENERIC" DECODE ROUTINES.
4340  */
4341
4342 /*
4343  * Decode OPEN_DOWNGRADE response
4344  */
4345 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4346 {
4347         struct xdr_stream xdr;
4348         struct compound_hdr hdr;
4349         int status;
4350
4351         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4352         status = decode_compound_hdr(&xdr, &hdr);
4353         if (status)
4354                 goto out;
4355         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4356         if (status)
4357                 goto out;
4358         status = decode_putfh(&xdr);
4359         if (status)
4360                 goto out;
4361         status = decode_open_downgrade(&xdr, res);
4362         if (status != 0)
4363                 goto out;
4364         decode_getfattr(&xdr, res->fattr, res->server);
4365 out:
4366         return status;
4367 }
4368
4369 /*
4370  * Decode ACCESS response
4371  */
4372 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4373 {
4374         struct xdr_stream xdr;
4375         struct compound_hdr hdr;
4376         int status;
4377
4378         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4379         status = decode_compound_hdr(&xdr, &hdr);
4380         if (status)
4381                 goto out;
4382         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4383         if (status)
4384                 goto out;
4385         status = decode_putfh(&xdr);
4386         if (status != 0)
4387                 goto out;
4388         status = decode_access(&xdr, res);
4389         if (status != 0)
4390                 goto out;
4391         decode_getfattr(&xdr, res->fattr, res->server);
4392 out:
4393         return status;
4394 }
4395
4396 /*
4397  * Decode LOOKUP response
4398  */
4399 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4400 {
4401         struct xdr_stream xdr;
4402         struct compound_hdr hdr;
4403         int status;
4404
4405         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4406         status = decode_compound_hdr(&xdr, &hdr);
4407         if (status)
4408                 goto out;
4409         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4410         if (status)
4411                 goto out;
4412         if ((status = decode_putfh(&xdr)) != 0)
4413                 goto out;
4414         if ((status = decode_lookup(&xdr)) != 0)
4415                 goto out;
4416         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4417                 goto out;
4418         status = decode_getfattr(&xdr, res->fattr, res->server);
4419 out:
4420         return status;
4421 }
4422
4423 /*
4424  * Decode LOOKUP_ROOT response
4425  */
4426 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4427 {
4428         struct xdr_stream xdr;
4429         struct compound_hdr hdr;
4430         int status;
4431
4432         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4433         status = decode_compound_hdr(&xdr, &hdr);
4434         if (status)
4435                 goto out;
4436         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4437         if (status)
4438                 goto out;
4439         if ((status = decode_putrootfh(&xdr)) != 0)
4440                 goto out;
4441         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4442                 status = decode_getfattr(&xdr, res->fattr, res->server);
4443 out:
4444         return status;
4445 }
4446
4447 /*
4448  * Decode REMOVE response
4449  */
4450 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4451 {
4452         struct xdr_stream xdr;
4453         struct compound_hdr hdr;
4454         int status;
4455
4456         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4457         status = decode_compound_hdr(&xdr, &hdr);
4458         if (status)
4459                 goto out;
4460         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4461         if (status)
4462                 goto out;
4463         if ((status = decode_putfh(&xdr)) != 0)
4464                 goto out;
4465         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4466                 goto out;
4467         decode_getfattr(&xdr, &res->dir_attr, res->server);
4468 out:
4469         return status;
4470 }
4471
4472 /*
4473  * Decode RENAME response
4474  */
4475 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4476 {
4477         struct xdr_stream xdr;
4478         struct compound_hdr hdr;
4479         int status;
4480
4481         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4482         status = decode_compound_hdr(&xdr, &hdr);
4483         if (status)
4484                 goto out;
4485         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4486         if (status)
4487                 goto out;
4488         if ((status = decode_putfh(&xdr)) != 0)
4489                 goto out;
4490         if ((status = decode_savefh(&xdr)) != 0)
4491                 goto out;
4492         if ((status = decode_putfh(&xdr)) != 0)
4493                 goto out;
4494         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4495                 goto out;
4496         /* Current FH is target directory */
4497         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4498                 goto out;
4499         if ((status = decode_restorefh(&xdr)) != 0)
4500                 goto out;
4501         decode_getfattr(&xdr, res->old_fattr, res->server);
4502 out:
4503         return status;
4504 }
4505
4506 /*
4507  * Decode LINK response
4508  */
4509 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4510 {
4511         struct xdr_stream xdr;
4512         struct compound_hdr hdr;
4513         int status;
4514
4515         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4516         status = decode_compound_hdr(&xdr, &hdr);
4517         if (status)
4518                 goto out;
4519         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4520         if (status)
4521                 goto out;
4522         if ((status = decode_putfh(&xdr)) != 0)
4523                 goto out;
4524         if ((status = decode_savefh(&xdr)) != 0)
4525                 goto out;
4526         if ((status = decode_putfh(&xdr)) != 0)
4527                 goto out;
4528         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4529                 goto out;
4530         /*
4531          * Note order: OP_LINK leaves the directory as the current
4532          *             filehandle.
4533          */
4534         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4535                 goto out;
4536         if ((status = decode_restorefh(&xdr)) != 0)
4537                 goto out;
4538         decode_getfattr(&xdr, res->fattr, res->server);
4539 out:
4540         return status;
4541 }
4542
4543 /*
4544  * Decode CREATE response
4545  */
4546 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4547 {
4548         struct xdr_stream xdr;
4549         struct compound_hdr hdr;
4550         int status;
4551
4552         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4553         status = decode_compound_hdr(&xdr, &hdr);
4554         if (status)
4555                 goto out;
4556         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4557         if (status)
4558                 goto out;
4559         if ((status = decode_putfh(&xdr)) != 0)
4560                 goto out;
4561         if ((status = decode_savefh(&xdr)) != 0)
4562                 goto out;
4563         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4564                 goto out;
4565         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4566                 goto out;
4567         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4568                 goto out;
4569         if ((status = decode_restorefh(&xdr)) != 0)
4570                 goto out;
4571         decode_getfattr(&xdr, res->dir_fattr, res->server);
4572 out:
4573         return status;
4574 }
4575
4576 /*
4577  * Decode SYMLINK response
4578  */
4579 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4580 {
4581         return nfs4_xdr_dec_create(rqstp, p, res);
4582 }
4583
4584 /*
4585  * Decode GETATTR response
4586  */
4587 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4588 {
4589         struct xdr_stream xdr;
4590         struct compound_hdr hdr;
4591         int status;
4592
4593         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4594         status = decode_compound_hdr(&xdr, &hdr);
4595         if (status)
4596                 goto out;
4597         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4598         if (status)
4599                 goto out;
4600         status = decode_putfh(&xdr);
4601         if (status)
4602                 goto out;
4603         status = decode_getfattr(&xdr, res->fattr, res->server);
4604 out:
4605         return status;
4606 }
4607
4608 /*
4609  * Encode an SETACL request
4610  */
4611 static int
4612 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4613 {
4614         struct xdr_stream xdr;
4615         struct compound_hdr hdr = {
4616                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4617         };
4618         int status;
4619
4620         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4621         encode_compound_hdr(&xdr, req, &hdr);
4622         encode_sequence(&xdr, &args->seq_args, &hdr);
4623         encode_putfh(&xdr, args->fh, &hdr);
4624         status = encode_setacl(&xdr, args, &hdr);
4625         encode_nops(&hdr);
4626         return status;
4627 }
4628
4629 /*
4630  * Decode SETACL response
4631  */
4632 static int
4633 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4634                     struct nfs_setaclres *res)
4635 {
4636         struct xdr_stream xdr;
4637         struct compound_hdr hdr;
4638         int status;
4639
4640         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4641         status = decode_compound_hdr(&xdr, &hdr);
4642         if (status)
4643                 goto out;
4644         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4645         if (status)
4646                 goto out;
4647         status = decode_putfh(&xdr);
4648         if (status)
4649                 goto out;
4650         status = decode_setattr(&xdr);
4651 out:
4652         return status;
4653 }
4654
4655 /*
4656  * Decode GETACL response
4657  */
4658 static int
4659 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4660                     struct nfs_getaclres *res)
4661 {
4662         struct xdr_stream xdr;
4663         struct compound_hdr hdr;
4664         int status;
4665
4666         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4667         status = decode_compound_hdr(&xdr, &hdr);
4668         if (status)
4669                 goto out;
4670         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4671         if (status)
4672                 goto out;
4673         status = decode_putfh(&xdr);
4674         if (status)
4675                 goto out;
4676         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4677
4678 out:
4679         return status;
4680 }
4681
4682 /*
4683  * Decode CLOSE response
4684  */
4685 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4686 {
4687         struct xdr_stream xdr;
4688         struct compound_hdr hdr;
4689         int status;
4690
4691         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4692         status = decode_compound_hdr(&xdr, &hdr);
4693         if (status)
4694                 goto out;
4695         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4696         if (status)
4697                 goto out;
4698         status = decode_putfh(&xdr);
4699         if (status)
4700                 goto out;
4701         status = decode_close(&xdr, res);
4702         if (status != 0)
4703                 goto out;
4704         /*
4705          * Note: Server may do delete on close for this file
4706          *      in which case the getattr call will fail with
4707          *      an ESTALE error. Shouldn't be a problem,
4708          *      though, since fattr->valid will remain unset.
4709          */
4710         decode_getfattr(&xdr, res->fattr, res->server);
4711 out:
4712         return status;
4713 }
4714
4715 /*
4716  * Decode OPEN response
4717  */
4718 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4719 {
4720         struct xdr_stream xdr;
4721         struct compound_hdr hdr;
4722         int status;
4723
4724         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4725         status = decode_compound_hdr(&xdr, &hdr);
4726         if (status)
4727                 goto out;
4728         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4729         if (status)
4730                 goto out;
4731         status = decode_putfh(&xdr);
4732         if (status)
4733                 goto out;
4734         status = decode_savefh(&xdr);
4735         if (status)
4736                 goto out;
4737         status = decode_open(&xdr, res);
4738         if (status)
4739                 goto out;
4740         if (decode_getfh(&xdr, &res->fh) != 0)
4741                 goto out;
4742         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4743                 goto out;
4744         if (decode_restorefh(&xdr) != 0)
4745                 goto out;
4746         decode_getfattr(&xdr, res->dir_attr, res->server);
4747 out:
4748         return status;
4749 }
4750
4751 /*
4752  * Decode OPEN_CONFIRM response
4753  */
4754 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4755 {
4756         struct xdr_stream xdr;
4757         struct compound_hdr hdr;
4758         int status;
4759
4760         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4761         status = decode_compound_hdr(&xdr, &hdr);
4762         if (status)
4763                 goto out;
4764         status = decode_putfh(&xdr);
4765         if (status)
4766                 goto out;
4767         status = decode_open_confirm(&xdr, res);
4768 out:
4769         return status;
4770 }
4771
4772 /*
4773  * Decode OPEN response
4774  */
4775 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4776 {
4777         struct xdr_stream xdr;
4778         struct compound_hdr hdr;
4779         int status;
4780
4781         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4782         status = decode_compound_hdr(&xdr, &hdr);
4783         if (status)
4784                 goto out;
4785         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4786         if (status)
4787                 goto out;
4788         status = decode_putfh(&xdr);
4789         if (status)
4790                 goto out;
4791         status = decode_open(&xdr, res);
4792         if (status)
4793                 goto out;
4794         decode_getfattr(&xdr, res->f_attr, res->server);
4795 out:
4796         return status;
4797 }
4798
4799 /*
4800  * Decode SETATTR response
4801  */
4802 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4803 {
4804         struct xdr_stream xdr;
4805         struct compound_hdr hdr;
4806         int status;
4807
4808         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4809         status = decode_compound_hdr(&xdr, &hdr);
4810         if (status)
4811                 goto out;
4812         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4813         if (status)
4814                 goto out;
4815         status = decode_putfh(&xdr);
4816         if (status)
4817                 goto out;
4818         status = decode_setattr(&xdr);
4819         if (status)
4820                 goto out;
4821         decode_getfattr(&xdr, res->fattr, res->server);
4822 out:
4823         return status;
4824 }
4825
4826 /*
4827  * Decode LOCK response
4828  */
4829 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4830 {
4831         struct xdr_stream xdr;
4832         struct compound_hdr hdr;
4833         int status;
4834
4835         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4836         status = decode_compound_hdr(&xdr, &hdr);
4837         if (status)
4838                 goto out;
4839         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4840         if (status)
4841                 goto out;
4842         status = decode_putfh(&xdr);
4843         if (status)
4844                 goto out;
4845         status = decode_lock(&xdr, res);
4846 out:
4847         return status;
4848 }
4849
4850 /*
4851  * Decode LOCKT response
4852  */
4853 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4854 {
4855         struct xdr_stream xdr;
4856         struct compound_hdr hdr;
4857         int status;
4858
4859         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4860         status = decode_compound_hdr(&xdr, &hdr);
4861         if (status)
4862                 goto out;
4863         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4864         if (status)
4865                 goto out;
4866         status = decode_putfh(&xdr);
4867         if (status)
4868                 goto out;
4869         status = decode_lockt(&xdr, res);
4870 out:
4871         return status;
4872 }
4873
4874 /*
4875  * Decode LOCKU response
4876  */
4877 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4878 {
4879         struct xdr_stream xdr;
4880         struct compound_hdr hdr;
4881         int status;
4882
4883         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4884         status = decode_compound_hdr(&xdr, &hdr);
4885         if (status)
4886                 goto out;
4887         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4888         if (status)
4889                 goto out;
4890         status = decode_putfh(&xdr);
4891         if (status)
4892                 goto out;
4893         status = decode_locku(&xdr, res);
4894 out:
4895         return status;
4896 }
4897
4898 /*
4899  * Decode READLINK response
4900  */
4901 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4902                                  struct nfs4_readlink_res *res)
4903 {
4904         struct xdr_stream xdr;
4905         struct compound_hdr hdr;
4906         int status;
4907
4908         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4909         status = decode_compound_hdr(&xdr, &hdr);
4910         if (status)
4911                 goto out;
4912         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4913         if (status)
4914                 goto out;
4915         status = decode_putfh(&xdr);
4916         if (status)
4917                 goto out;
4918         status = decode_readlink(&xdr, rqstp);
4919 out:
4920         return status;
4921 }
4922
4923 /*
4924  * Decode READDIR response
4925  */
4926 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4927 {
4928         struct xdr_stream xdr;
4929         struct compound_hdr hdr;
4930         int status;
4931
4932         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4933         status = decode_compound_hdr(&xdr, &hdr);
4934         if (status)
4935                 goto out;
4936         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4937         if (status)
4938                 goto out;
4939         status = decode_putfh(&xdr);
4940         if (status)
4941                 goto out;
4942         status = decode_readdir(&xdr, rqstp, res);
4943 out:
4944         return status;
4945 }
4946
4947 /*
4948  * Decode Read response
4949  */
4950 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4951 {
4952         struct xdr_stream xdr;
4953         struct compound_hdr hdr;
4954         int status;
4955
4956         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4957         status = decode_compound_hdr(&xdr, &hdr);
4958         if (status)
4959                 goto out;
4960         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4961         if (status)
4962                 goto out;
4963         status = decode_putfh(&xdr);
4964         if (status)
4965                 goto out;
4966         status = decode_read(&xdr, rqstp, res);
4967         if (!status)
4968                 status = res->count;
4969 out:
4970         return status;
4971 }
4972
4973 /*
4974  * Decode WRITE response
4975  */
4976 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4977 {
4978         struct xdr_stream xdr;
4979         struct compound_hdr hdr;
4980         int status;
4981
4982         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4983         status = decode_compound_hdr(&xdr, &hdr);
4984         if (status)
4985                 goto out;
4986         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4987         if (status)
4988                 goto out;
4989         status = decode_putfh(&xdr);
4990         if (status)
4991                 goto out;
4992         status = decode_write(&xdr, res);
4993         if (status)
4994                 goto out;
4995         decode_getfattr(&xdr, res->fattr, res->server);
4996         if (!status)
4997                 status = res->count;
4998 out:
4999         return status;
5000 }
5001
5002 /*
5003  * Decode COMMIT response
5004  */
5005 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5006 {
5007         struct xdr_stream xdr;
5008         struct compound_hdr hdr;
5009         int status;
5010
5011         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5012         status = decode_compound_hdr(&xdr, &hdr);
5013         if (status)
5014                 goto out;
5015         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5016         if (status)
5017                 goto out;
5018         status = decode_putfh(&xdr);
5019         if (status)
5020                 goto out;
5021         status = decode_commit(&xdr, res);
5022         if (status)
5023                 goto out;
5024         decode_getfattr(&xdr, res->fattr, res->server);
5025 out:
5026         return status;
5027 }
5028
5029 /*
5030  * FSINFO request
5031  */
5032 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5033                                struct nfs4_fsinfo_res *res)
5034 {
5035         struct xdr_stream xdr;
5036         struct compound_hdr hdr;
5037         int status;
5038
5039         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5040         status = decode_compound_hdr(&xdr, &hdr);
5041         if (!status)
5042                 status = decode_sequence(&xdr, &res->seq_res, req);
5043         if (!status)
5044                 status = decode_putfh(&xdr);
5045         if (!status)
5046                 status = decode_fsinfo(&xdr, res->fsinfo);
5047         return status;
5048 }
5049
5050 /*
5051  * PATHCONF request
5052  */
5053 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5054                                  struct nfs4_pathconf_res *res)
5055 {
5056         struct xdr_stream xdr;
5057         struct compound_hdr hdr;
5058         int status;
5059
5060         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5061         status = decode_compound_hdr(&xdr, &hdr);
5062         if (!status)
5063                 status = decode_sequence(&xdr, &res->seq_res, req);
5064         if (!status)
5065                 status = decode_putfh(&xdr);
5066         if (!status)
5067                 status = decode_pathconf(&xdr, res->pathconf);
5068         return status;
5069 }
5070
5071 /*
5072  * STATFS request
5073  */
5074 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5075                                struct nfs4_statfs_res *res)
5076 {
5077         struct xdr_stream xdr;
5078         struct compound_hdr hdr;
5079         int status;
5080
5081         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5082         status = decode_compound_hdr(&xdr, &hdr);
5083         if (!status)
5084                 status = decode_sequence(&xdr, &res->seq_res, req);
5085         if (!status)
5086                 status = decode_putfh(&xdr);
5087         if (!status)
5088                 status = decode_statfs(&xdr, res->fsstat);
5089         return status;
5090 }
5091
5092 /*
5093  * GETATTR_BITMAP request
5094  */
5095 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5096 {
5097         struct xdr_stream xdr;
5098         struct compound_hdr hdr;
5099         int status;
5100
5101         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5102         status = decode_compound_hdr(&xdr, &hdr);
5103         if (status)
5104                 goto out;
5105         status = decode_sequence(&xdr, &res->seq_res, req);
5106         if (status)
5107                 goto out;
5108         if ((status = decode_putfh(&xdr)) != 0)
5109                 goto out;
5110         status = decode_server_caps(&xdr, res);
5111 out:
5112         return status;
5113 }
5114
5115 /*
5116  * Decode RENEW response
5117  */
5118 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5119 {
5120         struct xdr_stream xdr;
5121         struct compound_hdr hdr;
5122         int status;
5123
5124         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5125         status = decode_compound_hdr(&xdr, &hdr);
5126         if (!status)
5127                 status = decode_renew(&xdr);
5128         return status;
5129 }
5130
5131 /*
5132  * a SETCLIENTID request
5133  */
5134 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5135                 struct nfs_client *clp)
5136 {
5137         struct xdr_stream xdr;
5138         struct compound_hdr hdr;
5139         int status;
5140
5141         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5142         status = decode_compound_hdr(&xdr, &hdr);
5143         if (!status)
5144                 status = decode_setclientid(&xdr, clp);
5145         return status;
5146 }
5147
5148 /*
5149  * a SETCLIENTID_CONFIRM request
5150  */
5151 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5152 {
5153         struct xdr_stream xdr;
5154         struct compound_hdr hdr;
5155         int status;
5156
5157         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5158         status = decode_compound_hdr(&xdr, &hdr);
5159         if (!status)
5160                 status = decode_setclientid_confirm(&xdr);
5161         if (!status)
5162                 status = decode_putrootfh(&xdr);
5163         if (!status)
5164                 status = decode_fsinfo(&xdr, fsinfo);
5165         return status;
5166 }
5167
5168 /*
5169  * DELEGRETURN request
5170  */
5171 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5172 {
5173         struct xdr_stream xdr;
5174         struct compound_hdr hdr;
5175         int status;
5176
5177         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5178         status = decode_compound_hdr(&xdr, &hdr);
5179         if (status)
5180                 goto out;
5181         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5182         if (status)
5183                 goto out;
5184         status = decode_putfh(&xdr);
5185         if (status != 0)
5186                 goto out;
5187         status = decode_delegreturn(&xdr);
5188         decode_getfattr(&xdr, res->fattr, res->server);
5189 out:
5190         return status;
5191 }
5192
5193 /*
5194  * FS_LOCATIONS request
5195  */
5196 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5197                                      struct nfs4_fs_locations_res *res)
5198 {
5199         struct xdr_stream xdr;
5200         struct compound_hdr hdr;
5201         int status;
5202
5203         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5204         status = decode_compound_hdr(&xdr, &hdr);
5205         if (status)
5206                 goto out;
5207         status = decode_sequence(&xdr, &res->seq_res, req);
5208         if (status)
5209                 goto out;
5210         if ((status = decode_putfh(&xdr)) != 0)
5211                 goto out;
5212         if ((status = decode_lookup(&xdr)) != 0)
5213                 goto out;
5214         xdr_enter_page(&xdr, PAGE_SIZE);
5215         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5216                                  res->fs_locations->server);
5217 out:
5218         return status;
5219 }
5220
5221 #if defined(CONFIG_NFS_V4_1)
5222 /*
5223  * EXCHANGE_ID request
5224  */
5225 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5226                                     void *res)
5227 {
5228         struct xdr_stream xdr;
5229         struct compound_hdr hdr;
5230         int status;
5231
5232         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5233         status = decode_compound_hdr(&xdr, &hdr);
5234         if (!status)
5235                 status = decode_exchange_id(&xdr, res);
5236         return status;
5237 }
5238
5239 /*
5240  * a CREATE_SESSION request
5241  */
5242 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5243                                        struct nfs41_create_session_res *res)
5244 {
5245         struct xdr_stream xdr;
5246         struct compound_hdr hdr;
5247         int status;
5248
5249         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5250         status = decode_compound_hdr(&xdr, &hdr);
5251         if (!status)
5252                 status = decode_create_session(&xdr, res);
5253         return status;
5254 }
5255
5256 /*
5257  * a DESTROY_SESSION request
5258  */
5259 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5260                                         void *dummy)
5261 {
5262         struct xdr_stream xdr;
5263         struct compound_hdr hdr;
5264         int status;
5265
5266         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5267         status = decode_compound_hdr(&xdr, &hdr);
5268         if (!status)
5269                 status = decode_destroy_session(&xdr, dummy);
5270         return status;
5271 }
5272
5273 /*
5274  * a SEQUENCE request
5275  */
5276 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5277                                  struct nfs4_sequence_res *res)
5278 {
5279         struct xdr_stream xdr;
5280         struct compound_hdr hdr;
5281         int status;
5282
5283         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5284         status = decode_compound_hdr(&xdr, &hdr);
5285         if (!status)
5286                 status = decode_sequence(&xdr, res, rqstp);
5287         return status;
5288 }
5289
5290 /*
5291  * a GET_LEASE_TIME request
5292  */
5293 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5294                                        struct nfs4_get_lease_time_res *res)
5295 {
5296         struct xdr_stream xdr;
5297         struct compound_hdr hdr;
5298         int status;
5299
5300         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5301         status = decode_compound_hdr(&xdr, &hdr);
5302         if (!status)
5303                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5304         if (!status)
5305                 status = decode_putrootfh(&xdr);
5306         if (!status)
5307                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5308         return status;
5309 }
5310 #endif /* CONFIG_NFS_V4_1 */
5311
5312 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5313 {
5314         uint32_t bitmap[2] = {0};
5315         uint32_t len;
5316
5317         if (!*p++) {
5318                 if (!*p)
5319                         return ERR_PTR(-EAGAIN);
5320                 entry->eof = 1;
5321                 return ERR_PTR(-EBADCOOKIE);
5322         }
5323
5324         entry->prev_cookie = entry->cookie;
5325         p = xdr_decode_hyper(p, &entry->cookie);
5326         entry->len = ntohl(*p++);
5327         entry->name = (const char *) p;
5328         p += XDR_QUADLEN(entry->len);
5329
5330         /*
5331          * In case the server doesn't return an inode number,
5332          * we fake one here.  (We don't use inode number 0,
5333          * since glibc seems to choke on it...)
5334          */
5335         entry->ino = 1;
5336
5337         len = ntohl(*p++);              /* bitmap length */
5338         if (len-- > 0) {
5339                 bitmap[0] = ntohl(*p++);
5340                 if (len-- > 0) {
5341                         bitmap[1] = ntohl(*p++);
5342                         p += len;
5343                 }
5344         }
5345         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5346         if (len > 0) {
5347                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5348                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5349                         /* Ignore the return value of rdattr_error for now */
5350                         p++;
5351                         len--;
5352                 }
5353                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5354                         xdr_decode_hyper(p, &entry->ino);
5355                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5356                         xdr_decode_hyper(p, &entry->ino);
5357                 p += len;
5358         }
5359
5360         entry->eof = !p[0] && p[1];
5361         return p;
5362 }
5363
5364 /*
5365  * We need to translate between nfs status return values and
5366  * the local errno values which may not be the same.
5367  */
5368 static struct {
5369         int stat;
5370         int errno;
5371 } nfs_errtbl[] = {
5372         { NFS4_OK,              0               },
5373         { NFS4ERR_PERM,         -EPERM          },
5374         { NFS4ERR_NOENT,        -ENOENT         },
5375         { NFS4ERR_IO,           -errno_NFSERR_IO},
5376         { NFS4ERR_NXIO,         -ENXIO          },
5377         { NFS4ERR_ACCESS,       -EACCES         },
5378         { NFS4ERR_EXIST,        -EEXIST         },
5379         { NFS4ERR_XDEV,         -EXDEV          },
5380         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5381         { NFS4ERR_ISDIR,        -EISDIR         },
5382         { NFS4ERR_INVAL,        -EINVAL         },
5383         { NFS4ERR_FBIG,         -EFBIG          },
5384         { NFS4ERR_NOSPC,        -ENOSPC         },
5385         { NFS4ERR_ROFS,         -EROFS          },
5386         { NFS4ERR_MLINK,        -EMLINK         },
5387         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5388         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5389         { NFS4ERR_DQUOT,        -EDQUOT         },
5390         { NFS4ERR_STALE,        -ESTALE         },
5391         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5392         { NFS4ERR_BADOWNER,     -EINVAL         },
5393         { NFS4ERR_BADNAME,      -EINVAL         },
5394         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5395         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5396         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5397         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5398         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5399         { NFS4ERR_LOCKED,       -EAGAIN         },
5400         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5401         { NFS4ERR_SYMLINK,      -ELOOP          },
5402         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5403         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5404         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5405                                                     * to be handled by a
5406                                                     * middle-layer.
5407                                                     */
5408         { -1,                   -EIO            }
5409 };
5410
5411 /*
5412  * Convert an NFS error code to a local one.
5413  * This one is used jointly by NFSv2 and NFSv3.
5414  */
5415 static int
5416 nfs4_stat_to_errno(int stat)
5417 {
5418         int i;
5419         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5420                 if (nfs_errtbl[i].stat == stat)
5421                         return nfs_errtbl[i].errno;
5422         }
5423         if (stat <= 10000 || stat > 10100) {
5424                 /* The server is looney tunes. */
5425                 return -ESERVERFAULT;
5426         }
5427         /* If we cannot translate the error, the recovery routines should
5428          * handle it.
5429          * Note: remaining NFSv4 error codes have values > 10000, so should
5430          * not conflict with native Linux error codes.
5431          */
5432         return -stat;
5433 }
5434
5435 #define PROC(proc, argtype, restype)                            \
5436 [NFSPROC4_CLNT_##proc] = {                                      \
5437         .p_proc   = NFSPROC4_COMPOUND,                          \
5438         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5439         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5440         .p_arglen = NFS4_##argtype##_sz,                        \
5441         .p_replen = NFS4_##restype##_sz,                        \
5442         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5443         .p_name   = #proc,                                      \
5444 }
5445
5446 struct rpc_procinfo     nfs4_procedures[] = {
5447   PROC(READ,            enc_read,       dec_read),
5448   PROC(WRITE,           enc_write,      dec_write),
5449   PROC(COMMIT,          enc_commit,     dec_commit),
5450   PROC(OPEN,            enc_open,       dec_open),
5451   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5452   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5453   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5454   PROC(CLOSE,           enc_close,      dec_close),
5455   PROC(SETATTR,         enc_setattr,    dec_setattr),
5456   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5457   PROC(RENEW,           enc_renew,      dec_renew),
5458   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5459   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5460   PROC(LOCK,            enc_lock,       dec_lock),
5461   PROC(LOCKT,           enc_lockt,      dec_lockt),
5462   PROC(LOCKU,           enc_locku,      dec_locku),
5463   PROC(ACCESS,          enc_access,     dec_access),
5464   PROC(GETATTR,         enc_getattr,    dec_getattr),
5465   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5466   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5467   PROC(REMOVE,          enc_remove,     dec_remove),
5468   PROC(RENAME,          enc_rename,     dec_rename),
5469   PROC(LINK,            enc_link,       dec_link),
5470   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5471   PROC(CREATE,          enc_create,     dec_create),
5472   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5473   PROC(STATFS,          enc_statfs,     dec_statfs),
5474   PROC(READLINK,        enc_readlink,   dec_readlink),
5475   PROC(READDIR,         enc_readdir,    dec_readdir),
5476   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5477   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5478   PROC(GETACL,          enc_getacl,     dec_getacl),
5479   PROC(SETACL,          enc_setacl,     dec_setacl),
5480   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5481 #if defined(CONFIG_NFS_V4_1)
5482   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5483   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5484   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5485   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5486   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5487 #endif /* CONFIG_NFS_V4_1 */
5488 };
5489
5490 struct rpc_version              nfs_version4 = {
5491         .number                 = 4,
5492         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5493         .procs                  = nfs4_procedures
5494 };
5495
5496 /*
5497  * Local variables:
5498  *  c-basic-offset: 8
5499  * End:
5500  */