SAFE public projects git trees. - safe/jmp/linux-2.6/blob - fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 250
 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 252                                 encode_verifier_maxsz + \
 253                                 1 /* co_ownerid.len */ + \
 254                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 255                                 1 /* flags */ + \
 256                                 1 /* spa_how */ + \
 257                                 0 /* SP4_NONE (for now) */ + \
 258                                 1 /* zero implemetation id array */)
 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 260                                 2 /* eir_clientid */ + \
 261                                 1 /* eir_sequenceid */ + \
 262                                 1 /* eir_flags */ + \
 263                                 1 /* spr_how */ + \
 264                                 0 /* SP4_NONE (for now) */ + \
 265                                 2 /* eir_server_owner.so_minor_id */ + \
 266                                 /* eir_server_owner.so_major_id<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 /* eir_server_scope<> */ \
 269                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 270                                 1 /* eir_server_impl_id array length */ + \
 271                                 0 /* ignored eir_server_impl_id contents */)
 272 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 273 #define decode_channel_attrs_maxsz  (6 + \
 274                                      1 /* ca_rdma_ird.len */ + \
 275                                      1 /* ca_rdma_ird */)
 276 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 277                                      2 /* csa_clientid */ + \
 278                                      1 /* csa_sequence */ + \
 279                                      1 /* csa_flags */ + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      1 /* csa_cb_program */ + \
 283                                      1 /* csa_sec_parms.len (1) */ + \
 284                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 285                                      1 /* stamp */ + \
 286                                      1 /* machinename.len */ + \
 287                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 288                                      1 /* uid */ + \
 289                                      1 /* gid */ + \
 290                                      1 /* gids.len (0) */)
 291 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 292                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 293                                      1 /* csr_sequence */ + \
 294                                      1 /* csr_flags */ + \
 295                                      decode_channel_attrs_maxsz + \
 296                                      decode_channel_attrs_maxsz)
 297 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 298 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 299 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 300                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 301 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 302                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 303 #else /* CONFIG_NFS_V4_1 */
 304 #define encode_sequence_maxsz   0
 305 #define decode_sequence_maxsz   0
 306 #endif /* CONFIG_NFS_V4_1 */
 307
 308 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 310 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 311                                 encode_sequence_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_read_maxsz)
 314 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 315                                 decode_sequence_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 decode_read_maxsz)
 318 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 319                                 encode_sequence_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_readlink_maxsz)
 322 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 323                                 decode_sequence_maxsz + \
 324                                 decode_putfh_maxsz + \
 325                                 decode_readlink_maxsz)
 326 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 327                                 encode_sequence_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_readdir_maxsz)
 330 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 331                                 decode_sequence_maxsz + \
 332                                 decode_putfh_maxsz + \
 333                                 decode_readdir_maxsz)
 334 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_write_maxsz + \
 338                                 encode_getattr_maxsz)
 339 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 340                                 decode_sequence_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_write_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_commit_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_commit_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_savefh_maxsz + \
 358                                 encode_open_maxsz + \
 359                                 encode_getfh_maxsz + \
 360                                 encode_getattr_maxsz + \
 361                                 encode_restorefh_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_savefh_maxsz + \
 367                                 decode_open_maxsz + \
 368                                 decode_getfh_maxsz + \
 369                                 decode_getattr_maxsz + \
 370                                 decode_restorefh_maxsz + \
 371                                 decode_getattr_maxsz)
 372 #define NFS4_enc_open_confirm_sz \
 373                                 (compound_encode_hdr_maxsz + \
 374                                  encode_putfh_maxsz + \
 375                                  encode_open_confirm_maxsz)
 376 #define NFS4_dec_open_confirm_sz \
 377                                 (compound_decode_hdr_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_open_confirm_maxsz)
 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 381                                         encode_sequence_maxsz + \
 382                                         encode_putfh_maxsz + \
 383                                         encode_open_maxsz + \
 384                                         encode_getattr_maxsz)
 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 386                                         decode_sequence_maxsz + \
 387                                         decode_putfh_maxsz + \
 388                                         decode_open_maxsz + \
 389                                         decode_getattr_maxsz)
 390 #define NFS4_enc_open_downgrade_sz \
 391                                 (compound_encode_hdr_maxsz + \
 392                                  encode_sequence_maxsz + \
 393                                  encode_putfh_maxsz + \
 394                                  encode_open_downgrade_maxsz + \
 395                                  encode_getattr_maxsz)
 396 #define NFS4_dec_open_downgrade_sz \
 397                                 (compound_decode_hdr_maxsz + \
 398                                  decode_sequence_maxsz + \
 399                                  decode_putfh_maxsz + \
 400                                  decode_open_downgrade_maxsz + \
 401                                  decode_getattr_maxsz)
 402 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 403                                  encode_sequence_maxsz + \
 404                                  encode_putfh_maxsz + \
 405                                  encode_close_maxsz + \
 406                                  encode_getattr_maxsz)
 407 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_close_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_setattr_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_setattr_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_fsinfo_maxsz)
 426 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_fsinfo_maxsz)
 430 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 431                                 encode_renew_maxsz)
 432 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 433                                 decode_renew_maxsz)
 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 435                                 encode_setclientid_maxsz)
 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 437                                 decode_setclientid_maxsz)
 438 #define NFS4_enc_setclientid_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                 encode_setclientid_confirm_maxsz + \
 441                                 encode_putrootfh_maxsz + \
 442                                 encode_fsinfo_maxsz)
 443 #define NFS4_dec_setclientid_confirm_sz \
 444                                 (compound_decode_hdr_maxsz + \
 445                                 decode_setclientid_confirm_maxsz + \
 446                                 decode_putrootfh_maxsz + \
 447                                 decode_fsinfo_maxsz)
 448 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_lock_maxsz)
 452 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_lock_maxsz)
 456 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_lockt_maxsz)
 460 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_lockt_maxsz)
 464 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_locku_maxsz)
 468 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_locku_maxsz)
 472 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_access_maxsz + \
 476                                 encode_getattr_maxsz)
 477 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getattr_maxsz)
 482 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_getattr_maxsz)
 490 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_lookup_maxsz + \
 494                                 encode_getattr_maxsz + \
 495                                 encode_getfh_maxsz)
 496 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 497                                 decode_sequence_maxsz + \
 498                                 decode_putfh_maxsz + \
 499                                 decode_lookup_maxsz + \
 500                                 decode_getattr_maxsz + \
 501                                 decode_getfh_maxsz)
 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putrootfh_maxsz + \
 505                                 encode_getattr_maxsz + \
 506                                 encode_getfh_maxsz)
 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putrootfh_maxsz + \
 510                                 decode_getattr_maxsz + \
 511                                 decode_getfh_maxsz)
 512 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_remove_maxsz + \
 516                                 encode_getattr_maxsz)
 517 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 518                                 decode_sequence_maxsz + \
 519                                 decode_putfh_maxsz + \
 520                                 decode_remove_maxsz + \
 521                                 decode_getattr_maxsz)
 522 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_savefh_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_rename_maxsz + \
 528                                 encode_getattr_maxsz + \
 529                                 encode_restorefh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_savefh_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_rename_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_restorefh_maxsz + \
 539                                 decode_getattr_maxsz)
 540 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 541                                 encode_sequence_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_savefh_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_link_maxsz + \
 546                                 decode_getattr_maxsz + \
 547                                 encode_restorefh_maxsz + \
 548                                 decode_getattr_maxsz)
 549 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_savefh_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_link_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_restorefh_maxsz + \
 557                                 decode_getattr_maxsz)
 558 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_symlink_maxsz + \
 562                                 encode_getattr_maxsz + \
 563                                 encode_getfh_maxsz)
 564 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 565                                 decode_sequence_maxsz + \
 566                                 decode_putfh_maxsz + \
 567                                 decode_symlink_maxsz + \
 568                                 decode_getattr_maxsz + \
 569                                 decode_getfh_maxsz)
 570 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_create_maxsz + \
 575                                 encode_getfh_maxsz + \
 576                                 encode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 encode_getattr_maxsz)
 579 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_create_maxsz + \
 584                                 decode_getfh_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_statfs_maxsz)
 600 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_statfs_maxsz)
 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_delegreturn_maxsz + \
 616                                 encode_getattr_maxsz)
 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_delegreturn_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_getacl_maxsz)
 625 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_getacl_maxsz)
 629 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_setacl_maxsz)
 633 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_setacl_maxsz)
 637 #define NFS4_enc_fs_locations_sz \
 638                                 (compound_encode_hdr_maxsz + \
 639                                  encode_sequence_maxsz + \
 640                                  encode_putfh_maxsz + \
 641                                  encode_lookup_maxsz + \
 642                                  encode_fs_locations_maxsz)
 643 #define NFS4_dec_fs_locations_sz \
 644                                 (compound_decode_hdr_maxsz + \
 645                                  decode_sequence_maxsz + \
 646                                  decode_putfh_maxsz + \
 647                                  decode_lookup_maxsz + \
 648                                  decode_fs_locations_maxsz)
 649 #if defined(CONFIG_NFS_V4_1)
 650 #define NFS4_enc_exchange_id_sz \
 651                                 (compound_encode_hdr_maxsz + \
 652                                  encode_exchange_id_maxsz)
 653 #define NFS4_dec_exchange_id_sz \
 654                                 (compound_decode_hdr_maxsz + \
 655                                  decode_exchange_id_maxsz)
 656 #define NFS4_enc_create_session_sz \
 657                                 (compound_encode_hdr_maxsz + \
 658                                  encode_create_session_maxsz)
 659 #define NFS4_dec_create_session_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_create_session_maxsz)
 662 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 663                                          encode_destroy_session_maxsz)
 664 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 665                                          decode_destroy_session_maxsz)
 666 #define NFS4_enc_sequence_sz \
 667                                 (compound_decode_hdr_maxsz + \
 668                                  encode_sequence_maxsz)
 669 #define NFS4_dec_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_sequence_maxsz)
 672 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 673                                          encode_sequence_maxsz + \
 674                                          encode_putrootfh_maxsz + \
 675                                          encode_fsinfo_maxsz)
 676 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 677                                          decode_sequence_maxsz + \
 678                                          decode_putrootfh_maxsz + \
 679                                          decode_fsinfo_maxsz)
 680 #endif /* CONFIG_NFS_V4_1 */
 681
 682 static const umode_t nfs_type2fmt[] = {
 683         [NF4BAD] = 0,
 684         [NF4REG] = S_IFREG,
 685         [NF4DIR] = S_IFDIR,
 686         [NF4BLK] = S_IFBLK,
 687         [NF4CHR] = S_IFCHR,
 688         [NF4LNK] = S_IFLNK,
 689         [NF4SOCK] = S_IFSOCK,
 690         [NF4FIFO] = S_IFIFO,
 691         [NF4ATTRDIR] = 0,
 692         [NF4NAMEDATTR] = 0,
 693 };
 694
 695 struct compound_hdr {
 696         int32_t         status;
 697         uint32_t        nops;
 698         __be32 *        nops_p;
 699         uint32_t        taglen;
 700         char *          tag;
 701         uint32_t        replen;         /* expected reply words */
 702         u32             minorversion;
 703 };
 704
 705 /*
 706  * START OF "GENERIC" ENCODE ROUTINES.
 707  *   These may look a little ugly since they are imported from a "generic"
 708  * set of XDR encode/decode routines which are intended to be shared by
 709  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 710  *
 711  * If the pain of reading these is too great, it should be a straightforward
 712  * task to translate them into Linux-specific versions which are more
 713  * consistent with the style used in NFSv2/v3...
 714  */
 715 #define WRITE32(n)               *p++ = htonl(n)
 716 #define WRITE64(n)               do {                           \
 717         *p++ = htonl((uint32_t)((n) >> 32));                            \
 718         *p++ = htonl((uint32_t)(n));                                    \
 719 } while (0)
 720 #define WRITEMEM(ptr,nbytes)     do {                           \
 721         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 722 } while (0)
 723
 724 #define RESERVE_SPACE(nbytes)   do {                            \
 725         p = xdr_reserve_space(xdr, nbytes);                     \
 726         BUG_ON(!p);                                             \
 727 } while (0)
 728
 729 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 730 {
 731         __be32 *p;
 732
 733         p = xdr_reserve_space(xdr, 4 + len);
 734         BUG_ON(p == NULL);
 735         xdr_encode_opaque(p, str, len);
 736 }
 737
 738 static void encode_compound_hdr(struct xdr_stream *xdr,
 739                                 struct rpc_rqst *req,
 740                                 struct compound_hdr *hdr)
 741 {
 742         __be32 *p;
 743         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 744
 745         /* initialize running count of expected bytes in reply.
 746          * NOTE: the replied tag SHOULD be the same is the one sent,
 747          * but this is not required as a MUST for the server to do so. */
 748         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 749
 750         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 751         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 752         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 753         WRITE32(hdr->taglen);
 754         WRITEMEM(hdr->tag, hdr->taglen);
 755         WRITE32(hdr->minorversion);
 756         hdr->nops_p = p;
 757         WRITE32(hdr->nops);
 758 }
 759
 760 static void encode_nops(struct compound_hdr *hdr)
 761 {
 762         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 763         *hdr->nops_p = htonl(hdr->nops);
 764 }
 765
 766 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 767 {
 768         __be32 *p;
 769
 770         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 771         BUG_ON(p == NULL);
 772         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 773 }
 774
 775 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 776 {
 777         char owner_name[IDMAP_NAMESZ];
 778         char owner_group[IDMAP_NAMESZ];
 779         int owner_namelen = 0;
 780         int owner_grouplen = 0;
 781         __be32 *p;
 782         __be32 *q;
 783         int len;
 784         uint32_t bmval0 = 0;
 785         uint32_t bmval1 = 0;
 786
 787         /*
 788          * We reserve enough space to write the entire attribute buffer at once.
 789          * In the worst-case, this would be
 790          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 791          *          = 36 bytes, plus any contribution from variable-length fields
 792          *            such as owner/group.
 793          */
 794         len = 16;
 795
 796         /* Sigh */
 797         if (iap->ia_valid & ATTR_SIZE)
 798                 len += 8;
 799         if (iap->ia_valid & ATTR_MODE)
 800                 len += 4;
 801         if (iap->ia_valid & ATTR_UID) {
 802                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 803                 if (owner_namelen < 0) {
 804                         dprintk("nfs: couldn't resolve uid %d to string\n",
 805                                         iap->ia_uid);
 806                         /* XXX */
 807                         strcpy(owner_name, "nobody");
 808                         owner_namelen = sizeof("nobody") - 1;
 809                         /* goto out; */
 810                 }
 811                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 812         }
 813         if (iap->ia_valid & ATTR_GID) {
 814                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 815                 if (owner_grouplen < 0) {
 816                         dprintk("nfs: couldn't resolve gid %d to string\n",
 817                                         iap->ia_gid);
 818                         strcpy(owner_group, "nobody");
 819                         owner_grouplen = sizeof("nobody") - 1;
 820                         /* goto out; */
 821                 }
 822                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 823         }
 824         if (iap->ia_valid & ATTR_ATIME_SET)
 825                 len += 16;
 826         else if (iap->ia_valid & ATTR_ATIME)
 827                 len += 4;
 828         if (iap->ia_valid & ATTR_MTIME_SET)
 829                 len += 16;
 830         else if (iap->ia_valid & ATTR_MTIME)
 831                 len += 4;
 832         RESERVE_SPACE(len);
 833
 834         /*
 835          * We write the bitmap length now, but leave the bitmap and the attribute
 836          * buffer length to be backfilled at the end of this routine.
 837          */
 838         WRITE32(2);
 839         q = p;
 840         p += 3;
 841
 842         if (iap->ia_valid & ATTR_SIZE) {
 843                 bmval0 |= FATTR4_WORD0_SIZE;
 844                 WRITE64(iap->ia_size);
 845         }
 846         if (iap->ia_valid & ATTR_MODE) {
 847                 bmval1 |= FATTR4_WORD1_MODE;
 848                 WRITE32(iap->ia_mode & S_IALLUGO);
 849         }
 850         if (iap->ia_valid & ATTR_UID) {
 851                 bmval1 |= FATTR4_WORD1_OWNER;
 852                 WRITE32(owner_namelen);
 853                 WRITEMEM(owner_name, owner_namelen);
 854         }
 855         if (iap->ia_valid & ATTR_GID) {
 856                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 857                 WRITE32(owner_grouplen);
 858                 WRITEMEM(owner_group, owner_grouplen);
 859         }
 860         if (iap->ia_valid & ATTR_ATIME_SET) {
 861                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 862                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 863                 WRITE32(0);
 864                 WRITE32(iap->ia_mtime.tv_sec);
 865                 WRITE32(iap->ia_mtime.tv_nsec);
 866         }
 867         else if (iap->ia_valid & ATTR_ATIME) {
 868                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 869                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 870         }
 871         if (iap->ia_valid & ATTR_MTIME_SET) {
 872                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 873                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 874                 WRITE32(0);
 875                 WRITE32(iap->ia_mtime.tv_sec);
 876                 WRITE32(iap->ia_mtime.tv_nsec);
 877         }
 878         else if (iap->ia_valid & ATTR_MTIME) {
 879                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 880                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 881         }
 882
 883         /*
 884          * Now we backfill the bitmap and the attribute buffer length.
 885          */
 886         if (len != ((char *)p - (char *)q) + 4) {
 887                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 888                                 len, ((char *)p - (char *)q) + 4);
 889                 BUG();
 890         }
 891         len = (char *)p - (char *)q - 12;
 892         *q++ = htonl(bmval0);
 893         *q++ = htonl(bmval1);
 894         *q++ = htonl(len);
 895
 896 /* out: */
 897 }
 898
 899 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 900 {
 901         __be32 *p;
 902
 903         RESERVE_SPACE(8);
 904         WRITE32(OP_ACCESS);
 905         WRITE32(access);
 906         hdr->nops++;
 907         hdr->replen += decode_access_maxsz;
 908 }
 909
 910 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 911 {
 912         __be32 *p;
 913
 914         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 915         WRITE32(OP_CLOSE);
 916         WRITE32(arg->seqid->sequence->counter);
 917         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 918         hdr->nops++;
 919         hdr->replen += decode_close_maxsz;
 920 }
 921
 922 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 923 {
 924         __be32 *p;
 925
 926         RESERVE_SPACE(16);
 927         WRITE32(OP_COMMIT);
 928         WRITE64(args->offset);
 929         WRITE32(args->count);
 930         hdr->nops++;
 931         hdr->replen += decode_commit_maxsz;
 932 }
 933
 934 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 935 {
 936         __be32 *p;
 937
 938         RESERVE_SPACE(8);
 939         WRITE32(OP_CREATE);
 940         WRITE32(create->ftype);
 941
 942         switch (create->ftype) {
 943         case NF4LNK:
 944                 RESERVE_SPACE(4);
 945                 WRITE32(create->u.symlink.len);
 946                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 947                 break;
 948
 949         case NF4BLK: case NF4CHR:
 950                 RESERVE_SPACE(8);
 951                 WRITE32(create->u.device.specdata1);
 952                 WRITE32(create->u.device.specdata2);
 953                 break;
 954
 955         default:
 956                 break;
 957         }
 958
 959         RESERVE_SPACE(4 + create->name->len);
 960         WRITE32(create->name->len);
 961         WRITEMEM(create->name->name, create->name->len);
 962         hdr->nops++;
 963         hdr->replen += decode_create_maxsz;
 964
 965         encode_attrs(xdr, create->attrs, create->server);
 966 }
 967
 968 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 969 {
 970         __be32 *p;
 971
 972         RESERVE_SPACE(12);
 973         WRITE32(OP_GETATTR);
 974         WRITE32(1);
 975         WRITE32(bitmap);
 976         hdr->nops++;
 977         hdr->replen += decode_getattr_maxsz;
 978 }
 979
 980 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 981 {
 982         __be32 *p;
 983
 984         RESERVE_SPACE(16);
 985         WRITE32(OP_GETATTR);
 986         WRITE32(2);
 987         WRITE32(bm0);
 988         WRITE32(bm1);
 989         hdr->nops++;
 990         hdr->replen += decode_getattr_maxsz;
 991 }
 992
 993 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 994 {
 995         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 996                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 997 }
 998
 999 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1000 {
1001         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1002                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1003 }
1004
1005 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1006 {
1007         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1008                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1009 }
1010
1011 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1012 {
1013         __be32 *p;
1014
1015         RESERVE_SPACE(4);
1016         WRITE32(OP_GETFH);
1017         hdr->nops++;
1018         hdr->replen += decode_getfh_maxsz;
1019 }
1020
1021 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1022 {
1023         __be32 *p;
1024
1025         RESERVE_SPACE(8 + name->len);
1026         WRITE32(OP_LINK);
1027         WRITE32(name->len);
1028         WRITEMEM(name->name, name->len);
1029         hdr->nops++;
1030         hdr->replen += decode_link_maxsz;
1031 }
1032
1033 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1034 {
1035         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1036                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1037         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1038 }
1039
1040 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1041 {
1042         if (fl->fl_end == OFFSET_MAX)
1043                 return ~(uint64_t)0;
1044         return fl->fl_end - fl->fl_start + 1;
1045 }
1046
1047 /*
1048  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1049  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1050  */
1051 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1052 {
1053         __be32 *p;
1054
1055         RESERVE_SPACE(32);
1056         WRITE32(OP_LOCK);
1057         WRITE32(nfs4_lock_type(args->fl, args->block));
1058         WRITE32(args->reclaim);
1059         WRITE64(args->fl->fl_start);
1060         WRITE64(nfs4_lock_length(args->fl));
1061         WRITE32(args->new_lock_owner);
1062         if (args->new_lock_owner){
1063                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1064                 WRITE32(args->open_seqid->sequence->counter);
1065                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
1066                 WRITE32(args->lock_seqid->sequence->counter);
1067                 WRITE64(args->lock_owner.clientid);
1068                 WRITE32(16);
1069                 WRITEMEM("lock id:", 8);
1070                 WRITE64(args->lock_owner.id);
1071         }
1072         else {
1073                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1074                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
1075                 WRITE32(args->lock_seqid->sequence->counter);
1076         }
1077         hdr->nops++;
1078         hdr->replen += decode_lock_maxsz;
1079 }
1080
1081 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1082 {
1083         __be32 *p;
1084
1085         RESERVE_SPACE(52);
1086         WRITE32(OP_LOCKT);
1087         WRITE32(nfs4_lock_type(args->fl, 0));
1088         WRITE64(args->fl->fl_start);
1089         WRITE64(nfs4_lock_length(args->fl));
1090         WRITE64(args->lock_owner.clientid);
1091         WRITE32(16);
1092         WRITEMEM("lock id:", 8);
1093         WRITE64(args->lock_owner.id);
1094         hdr->nops++;
1095         hdr->replen += decode_lockt_maxsz;
1096 }
1097
1098 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1099 {
1100         __be32 *p;
1101
1102         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1103         WRITE32(OP_LOCKU);
1104         WRITE32(nfs4_lock_type(args->fl, 0));
1105         WRITE32(args->seqid->sequence->counter);
1106         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
1107         WRITE64(args->fl->fl_start);
1108         WRITE64(nfs4_lock_length(args->fl));
1109         hdr->nops++;
1110         hdr->replen += decode_locku_maxsz;
1111 }
1112
1113 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1114 {
1115         int len = name->len;
1116         __be32 *p;
1117
1118         RESERVE_SPACE(8 + len);
1119         WRITE32(OP_LOOKUP);
1120         WRITE32(len);
1121         WRITEMEM(name->name, len);
1122         hdr->nops++;
1123         hdr->replen += decode_lookup_maxsz;
1124 }
1125
1126 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1127 {
1128         __be32 *p;
1129
1130         RESERVE_SPACE(8);
1131         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1132         case FMODE_READ:
1133                 WRITE32(NFS4_SHARE_ACCESS_READ);
1134                 break;
1135         case FMODE_WRITE:
1136                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
1137                 break;
1138         case FMODE_READ|FMODE_WRITE:
1139                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
1140                 break;
1141         default:
1142                 WRITE32(0);
1143         }
1144         WRITE32(0);             /* for linux, share_deny = 0 always */
1145 }
1146
1147 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1148 {
1149         __be32 *p;
1150  /*
1151  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1152  * owner 4 = 32
1153  */
1154         RESERVE_SPACE(8);
1155         WRITE32(OP_OPEN);
1156         WRITE32(arg->seqid->sequence->counter);
1157         encode_share_access(xdr, arg->fmode);
1158         RESERVE_SPACE(28);
1159         WRITE64(arg->clientid);
1160         WRITE32(16);
1161         WRITEMEM("open id:", 8);
1162         WRITE64(arg->id);
1163 }
1164
1165 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1166 {
1167         __be32 *p;
1168
1169         RESERVE_SPACE(4);
1170         switch(arg->open_flags & O_EXCL) {
1171         case 0:
1172                 WRITE32(NFS4_CREATE_UNCHECKED);
1173                 encode_attrs(xdr, arg->u.attrs, arg->server);
1174                 break;
1175         default:
1176                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1177                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1178         }
1179 }
1180
1181 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1182 {
1183         __be32 *p;
1184
1185         RESERVE_SPACE(4);
1186         switch (arg->open_flags & O_CREAT) {
1187         case 0:
1188                 WRITE32(NFS4_OPEN_NOCREATE);
1189                 break;
1190         default:
1191                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1192                 WRITE32(NFS4_OPEN_CREATE);
1193                 encode_createmode(xdr, arg);
1194         }
1195 }
1196
1197 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1198 {
1199         __be32 *p;
1200
1201         RESERVE_SPACE(4);
1202         switch (delegation_type) {
1203         case 0:
1204                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1205                 break;
1206         case FMODE_READ:
1207                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1208                 break;
1209         case FMODE_WRITE|FMODE_READ:
1210                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1211                 break;
1212         default:
1213                 BUG();
1214         }
1215 }
1216
1217 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1218 {
1219         __be32 *p;
1220
1221         RESERVE_SPACE(4);
1222         WRITE32(NFS4_OPEN_CLAIM_NULL);
1223         encode_string(xdr, name->len, name->name);
1224 }
1225
1226 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1227 {
1228         __be32 *p;
1229
1230         RESERVE_SPACE(4);
1231         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1232         encode_delegation_type(xdr, type);
1233 }
1234
1235 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1236 {
1237         __be32 *p;
1238
1239         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1240         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1241         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1242         encode_string(xdr, name->len, name->name);
1243 }
1244
1245 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1246 {
1247         encode_openhdr(xdr, arg);
1248         encode_opentype(xdr, arg);
1249         switch (arg->claim) {
1250         case NFS4_OPEN_CLAIM_NULL:
1251                 encode_claim_null(xdr, arg->name);
1252                 break;
1253         case NFS4_OPEN_CLAIM_PREVIOUS:
1254                 encode_claim_previous(xdr, arg->u.delegation_type);
1255                 break;
1256         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1257                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1258                 break;
1259         default:
1260                 BUG();
1261         }
1262         hdr->nops++;
1263         hdr->replen += decode_open_maxsz;
1264 }
1265
1266 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1267 {
1268         __be32 *p;
1269
1270         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1271         WRITE32(OP_OPEN_CONFIRM);
1272         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1273         WRITE32(arg->seqid->sequence->counter);
1274         hdr->nops++;
1275         hdr->replen += decode_open_confirm_maxsz;
1276 }
1277
1278 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1279 {
1280         __be32 *p;
1281
1282         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1283         WRITE32(OP_OPEN_DOWNGRADE);
1284         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1285         WRITE32(arg->seqid->sequence->counter);
1286         encode_share_access(xdr, arg->fmode);
1287         hdr->nops++;
1288         hdr->replen += decode_open_downgrade_maxsz;
1289 }
1290
1291 static void
1292 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1293 {
1294         int len = fh->size;
1295         __be32 *p;
1296
1297         RESERVE_SPACE(8 + len);
1298         WRITE32(OP_PUTFH);
1299         WRITE32(len);
1300         WRITEMEM(fh->data, len);
1301         hdr->nops++;
1302         hdr->replen += decode_putfh_maxsz;
1303 }
1304
1305 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1306 {
1307         __be32 *p;
1308
1309         RESERVE_SPACE(4);
1310         WRITE32(OP_PUTROOTFH);
1311         hdr->nops++;
1312         hdr->replen += decode_putrootfh_maxsz;
1313 }
1314
1315 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1316 {
1317         nfs4_stateid stateid;
1318         __be32 *p;
1319
1320         RESERVE_SPACE(NFS4_STATEID_SIZE);
1321         if (ctx->state != NULL) {
1322                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1323                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1324         } else
1325                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1326 }
1327
1328 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1329 {
1330         __be32 *p;
1331
1332         RESERVE_SPACE(4);
1333         WRITE32(OP_READ);
1334
1335         encode_stateid(xdr, args->context);
1336
1337         RESERVE_SPACE(12);
1338         WRITE64(args->offset);
1339         WRITE32(args->count);
1340         hdr->nops++;
1341         hdr->replen += decode_read_maxsz;
1342 }
1343
1344 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1345 {
1346         uint32_t attrs[2] = {
1347                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1348                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1349         };
1350         __be32 *p;
1351
1352         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1353         WRITE32(OP_READDIR);
1354         WRITE64(readdir->cookie);
1355         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1356         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1357         WRITE32(readdir->count);
1358         WRITE32(2);
1359         /* Switch to mounted_on_fileid if the server supports it */
1360         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1361                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1362         else
1363                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1364         WRITE32(attrs[0] & readdir->bitmask[0]);
1365         WRITE32(attrs[1] & readdir->bitmask[1]);
1366         hdr->nops++;
1367         hdr->replen += decode_readdir_maxsz;
1368         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1369                         __func__,
1370                         (unsigned long long)readdir->cookie,
1371                         ((u32 *)readdir->verifier.data)[0],
1372                         ((u32 *)readdir->verifier.data)[1],
1373                         attrs[0] & readdir->bitmask[0],
1374                         attrs[1] & readdir->bitmask[1]);
1375 }
1376
1377 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1378 {
1379         __be32 *p;
1380
1381         RESERVE_SPACE(4);
1382         WRITE32(OP_READLINK);
1383         hdr->nops++;
1384         hdr->replen += decode_readlink_maxsz;
1385 }
1386
1387 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1388 {
1389         __be32 *p;
1390
1391         RESERVE_SPACE(8 + name->len);
1392         WRITE32(OP_REMOVE);
1393         WRITE32(name->len);
1394         WRITEMEM(name->name, name->len);
1395         hdr->nops++;
1396         hdr->replen += decode_remove_maxsz;
1397 }
1398
1399 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1400 {
1401         __be32 *p;
1402
1403         RESERVE_SPACE(8 + oldname->len);
1404         WRITE32(OP_RENAME);
1405         WRITE32(oldname->len);
1406         WRITEMEM(oldname->name, oldname->len);
1407
1408         RESERVE_SPACE(4 + newname->len);
1409         WRITE32(newname->len);
1410         WRITEMEM(newname->name, newname->len);
1411         hdr->nops++;
1412         hdr->replen += decode_rename_maxsz;
1413 }
1414
1415 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1416 {
1417         __be32 *p;
1418
1419         RESERVE_SPACE(12);
1420         WRITE32(OP_RENEW);
1421         WRITE64(client_stateid->cl_clientid);
1422         hdr->nops++;
1423         hdr->replen += decode_renew_maxsz;
1424 }
1425
1426 static void
1427 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1428 {
1429         __be32 *p;
1430
1431         RESERVE_SPACE(4);
1432         WRITE32(OP_RESTOREFH);
1433         hdr->nops++;
1434         hdr->replen += decode_restorefh_maxsz;
1435 }
1436
1437 static int
1438 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1439 {
1440         __be32 *p;
1441
1442         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1443         WRITE32(OP_SETATTR);
1444         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1445         RESERVE_SPACE(2*4);
1446         WRITE32(1);
1447         WRITE32(FATTR4_WORD0_ACL);
1448         if (arg->acl_len % 4)
1449                 return -EINVAL;
1450         RESERVE_SPACE(4);
1451         WRITE32(arg->acl_len);
1452         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1453         hdr->nops++;
1454         hdr->replen += decode_setacl_maxsz;
1455         return 0;
1456 }
1457
1458 static void
1459 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1460 {
1461         __be32 *p;
1462
1463         RESERVE_SPACE(4);
1464         WRITE32(OP_SAVEFH);
1465         hdr->nops++;
1466         hdr->replen += decode_savefh_maxsz;
1467 }
1468
1469 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1470 {
1471         __be32 *p;
1472
1473         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1474         WRITE32(OP_SETATTR);
1475         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1476         hdr->nops++;
1477         hdr->replen += decode_setattr_maxsz;
1478         encode_attrs(xdr, arg->iap, server);
1479 }
1480
1481 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1482 {
1483         __be32 *p;
1484
1485         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1486         WRITE32(OP_SETCLIENTID);
1487         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1488
1489         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1490         RESERVE_SPACE(4);
1491         WRITE32(setclientid->sc_prog);
1492         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1493         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1494         RESERVE_SPACE(4);
1495         WRITE32(setclientid->sc_cb_ident);
1496         hdr->nops++;
1497         hdr->replen += decode_setclientid_maxsz;
1498 }
1499
1500 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1501 {
1502         __be32 *p;
1503
1504         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1505         WRITE32(OP_SETCLIENTID_CONFIRM);
1506         WRITE64(client_state->cl_clientid);
1507         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1508         hdr->nops++;
1509         hdr->replen += decode_setclientid_confirm_maxsz;
1510 }
1511
1512 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1513 {
1514         __be32 *p;
1515
1516         RESERVE_SPACE(4);
1517         WRITE32(OP_WRITE);
1518
1519         encode_stateid(xdr, args->context);
1520
1521         RESERVE_SPACE(16);
1522         WRITE64(args->offset);
1523         WRITE32(args->stable);
1524         WRITE32(args->count);
1525
1526         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1527         hdr->nops++;
1528         hdr->replen += decode_write_maxsz;
1529 }
1530
1531 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1532 {
1533         __be32 *p;
1534
1535         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1536
1537         WRITE32(OP_DELEGRETURN);
1538         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1539         hdr->nops++;
1540         hdr->replen += decode_delegreturn_maxsz;
1541 }
1542
1543 #if defined(CONFIG_NFS_V4_1)
1544 /* NFSv4.1 operations */
1545 static void encode_exchange_id(struct xdr_stream *xdr,
1546                                struct nfs41_exchange_id_args *args,
1547                                struct compound_hdr *hdr)
1548 {
1549         __be32 *p;
1550
1551         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1552         WRITE32(OP_EXCHANGE_ID);
1553         WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
1554
1555         encode_string(xdr, args->id_len, args->id);
1556
1557         RESERVE_SPACE(12);
1558         WRITE32(args->flags);
1559         WRITE32(0);     /* zero length state_protect4_a */
1560         WRITE32(0);     /* zero length implementation id array */
1561         hdr->nops++;
1562         hdr->replen += decode_exchange_id_maxsz;
1563 }
1564
1565 static void encode_create_session(struct xdr_stream *xdr,
1566                                   struct nfs41_create_session_args *args,
1567                                   struct compound_hdr *hdr)
1568 {
1569         __be32 *p;
1570         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1571         uint32_t len;
1572         struct nfs_client *clp = args->client;
1573
1574         RESERVE_SPACE(4);
1575         WRITE32(OP_CREATE_SESSION);
1576
1577         RESERVE_SPACE(8);
1578         WRITE64(clp->cl_ex_clid);
1579
1580         RESERVE_SPACE(8);
1581         WRITE32(clp->cl_seqid);                 /*Sequence id */
1582         WRITE32(args->flags);                   /*flags */
1583
1584         RESERVE_SPACE(2*28);                    /* 2 channel_attrs */
1585         /* Fore Channel */
1586         WRITE32(args->fc_attrs.headerpadsz);    /* header padding size */
1587         WRITE32(args->fc_attrs.max_rqst_sz);    /* max req size */
1588         WRITE32(args->fc_attrs.max_resp_sz);    /* max resp size */
1589         WRITE32(args->fc_attrs.max_resp_sz_cached);     /* Max resp sz cached */
1590         WRITE32(args->fc_attrs.max_ops);        /* max operations */
1591         WRITE32(args->fc_attrs.max_reqs);       /* max requests */
1592         WRITE32(0);                             /* rdmachannel_attrs */
1593
1594         /* Back Channel */
1595         WRITE32(args->fc_attrs.headerpadsz);    /* header padding size */
1596         WRITE32(args->bc_attrs.max_rqst_sz);    /* max req size */
1597         WRITE32(args->bc_attrs.max_resp_sz);    /* max resp size */
1598         WRITE32(args->bc_attrs.max_resp_sz_cached);     /* Max resp sz cached */
1599         WRITE32(args->bc_attrs.max_ops);        /* max operations */
1600         WRITE32(args->bc_attrs.max_reqs);       /* max requests */
1601         WRITE32(0);                             /* rdmachannel_attrs */
1602
1603         RESERVE_SPACE(4);
1604         WRITE32(args->cb_program);              /* cb_program */
1605
1606         RESERVE_SPACE(4);                       /* # of security flavors */
1607         WRITE32(1);
1608
1609         RESERVE_SPACE(4);
1610         WRITE32(RPC_AUTH_UNIX);                 /* auth_sys */
1611
1612         /* authsys_parms rfc1831 */
1613         RESERVE_SPACE(4);
1614         WRITE32((u32)clp->cl_boot_time.tv_nsec);        /* stamp */
1615         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1616                         clp->cl_ipaddr);
1617         RESERVE_SPACE(16 + len);
1618         WRITE32(len);
1619         WRITEMEM(machine_name, len);
1620         WRITE32(0);                             /* UID */
1621         WRITE32(0);                             /* GID */
1622         WRITE32(0);                             /* No more gids */
1623         hdr->nops++;
1624         hdr->replen += decode_create_session_maxsz;
1625 }
1626
1627 static void encode_destroy_session(struct xdr_stream *xdr,
1628                                    struct nfs4_session *session,
1629                                    struct compound_hdr *hdr)
1630 {
1631         __be32 *p;
1632         RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN);
1633         WRITE32(OP_DESTROY_SESSION);
1634         WRITEMEM(session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1635         hdr->nops++;
1636         hdr->replen += decode_destroy_session_maxsz;
1637 }
1638 #endif /* CONFIG_NFS_V4_1 */
1639
1640 static void encode_sequence(struct xdr_stream *xdr,
1641                             const struct nfs4_sequence_args *args,
1642                             struct compound_hdr *hdr)
1643 {
1644 #if defined(CONFIG_NFS_V4_1)
1645         struct nfs4_session *session = args->sa_session;
1646         struct nfs4_slot_table *tp;
1647         struct nfs4_slot *slot;
1648         __be32 *p;
1649
1650         if (!session)
1651                 return;
1652
1653         tp = &session->fc_slot_table;
1654
1655         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1656         slot = tp->slots + args->sa_slotid;
1657
1658         RESERVE_SPACE(4);
1659         WRITE32(OP_SEQUENCE);
1660
1661         /*
1662          * Sessionid + seqid + slotid + max slotid + cache_this
1663          */
1664         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1665                 "max_slotid=%d cache_this=%d\n",
1666                 __func__,
1667                 ((u32 *)session->sess_id.data)[0],
1668                 ((u32 *)session->sess_id.data)[1],
1669                 ((u32 *)session->sess_id.data)[2],
1670                 ((u32 *)session->sess_id.data)[3],
1671                 slot->seq_nr, args->sa_slotid,
1672                 tp->highest_used_slotid, args->sa_cache_this);
1673         RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 16);
1674         WRITEMEM(session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1675         WRITE32(slot->seq_nr);
1676         WRITE32(args->sa_slotid);
1677         WRITE32(tp->highest_used_slotid);
1678         WRITE32(args->sa_cache_this);
1679         hdr->nops++;
1680         hdr->replen += decode_sequence_maxsz;
1681 #endif /* CONFIG_NFS_V4_1 */
1682 }
1683
1684 /*
1685  * END OF "GENERIC" ENCODE ROUTINES.
1686  */
1687
1688 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1689 {
1690 #if defined(CONFIG_NFS_V4_1)
1691         if (args->sa_session)
1692                 return args->sa_session->clp->cl_minorversion;
1693 #endif /* CONFIG_NFS_V4_1 */
1694         return 0;
1695 }
1696
1697 /*
1698  * Encode an ACCESS request
1699  */
1700 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1701 {
1702         struct xdr_stream xdr;
1703         struct compound_hdr hdr = {
1704                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1705         };
1706
1707         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1708         encode_compound_hdr(&xdr, req, &hdr);
1709         encode_sequence(&xdr, &args->seq_args, &hdr);
1710         encode_putfh(&xdr, args->fh, &hdr);
1711         encode_access(&xdr, args->access, &hdr);
1712         encode_getfattr(&xdr, args->bitmask, &hdr);
1713         encode_nops(&hdr);
1714         return 0;
1715 }
1716
1717 /*
1718  * Encode LOOKUP request
1719  */
1720 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1721 {
1722         struct xdr_stream xdr;
1723         struct compound_hdr hdr = {
1724                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1725         };
1726
1727         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1728         encode_compound_hdr(&xdr, req, &hdr);
1729         encode_sequence(&xdr, &args->seq_args, &hdr);
1730         encode_putfh(&xdr, args->dir_fh, &hdr);
1731         encode_lookup(&xdr, args->name, &hdr);
1732         encode_getfh(&xdr, &hdr);
1733         encode_getfattr(&xdr, args->bitmask, &hdr);
1734         encode_nops(&hdr);
1735         return 0;
1736 }
1737
1738 /*
1739  * Encode LOOKUP_ROOT request
1740  */
1741 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1742 {
1743         struct xdr_stream xdr;
1744         struct compound_hdr hdr = {
1745                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1746         };
1747
1748         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1749         encode_compound_hdr(&xdr, req, &hdr);
1750         encode_sequence(&xdr, &args->seq_args, &hdr);
1751         encode_putrootfh(&xdr, &hdr);
1752         encode_getfh(&xdr, &hdr);
1753         encode_getfattr(&xdr, args->bitmask, &hdr);
1754         encode_nops(&hdr);
1755         return 0;
1756 }
1757
1758 /*
1759  * Encode REMOVE request
1760  */
1761 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1762 {
1763         struct xdr_stream xdr;
1764         struct compound_hdr hdr = {
1765                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1766         };
1767
1768         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1769         encode_compound_hdr(&xdr, req, &hdr);
1770         encode_sequence(&xdr, &args->seq_args, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_remove(&xdr, &args->name, &hdr);
1773         encode_getfattr(&xdr, args->bitmask, &hdr);
1774         encode_nops(&hdr);
1775         return 0;
1776 }
1777
1778 /*
1779  * Encode RENAME request
1780  */
1781 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1782 {
1783         struct xdr_stream xdr;
1784         struct compound_hdr hdr = {
1785                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1786         };
1787
1788         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1789         encode_compound_hdr(&xdr, req, &hdr);
1790         encode_sequence(&xdr, &args->seq_args, &hdr);
1791         encode_putfh(&xdr, args->old_dir, &hdr);
1792         encode_savefh(&xdr, &hdr);
1793         encode_putfh(&xdr, args->new_dir, &hdr);
1794         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1795         encode_getfattr(&xdr, args->bitmask, &hdr);
1796         encode_restorefh(&xdr, &hdr);
1797         encode_getfattr(&xdr, args->bitmask, &hdr);
1798         encode_nops(&hdr);
1799         return 0;
1800 }
1801
1802 /*
1803  * Encode LINK request
1804  */
1805 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1806 {
1807         struct xdr_stream xdr;
1808         struct compound_hdr hdr = {
1809                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1810         };
1811
1812         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1813         encode_compound_hdr(&xdr, req, &hdr);
1814         encode_sequence(&xdr, &args->seq_args, &hdr);
1815         encode_putfh(&xdr, args->fh, &hdr);
1816         encode_savefh(&xdr, &hdr);
1817         encode_putfh(&xdr, args->dir_fh, &hdr);
1818         encode_link(&xdr, args->name, &hdr);
1819         encode_getfattr(&xdr, args->bitmask, &hdr);
1820         encode_restorefh(&xdr, &hdr);
1821         encode_getfattr(&xdr, args->bitmask, &hdr);
1822         encode_nops(&hdr);
1823         return 0;
1824 }
1825
1826 /*
1827  * Encode CREATE request
1828  */
1829 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1830 {
1831         struct xdr_stream xdr;
1832         struct compound_hdr hdr = {
1833                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1834         };
1835
1836         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1837         encode_compound_hdr(&xdr, req, &hdr);
1838         encode_sequence(&xdr, &args->seq_args, &hdr);
1839         encode_putfh(&xdr, args->dir_fh, &hdr);
1840         encode_savefh(&xdr, &hdr);
1841         encode_create(&xdr, args, &hdr);
1842         encode_getfh(&xdr, &hdr);
1843         encode_getfattr(&xdr, args->bitmask, &hdr);
1844         encode_restorefh(&xdr, &hdr);
1845         encode_getfattr(&xdr, args->bitmask, &hdr);
1846         encode_nops(&hdr);
1847         return 0;
1848 }
1849
1850 /*
1851  * Encode SYMLINK request
1852  */
1853 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1854 {
1855         return nfs4_xdr_enc_create(req, p, args);
1856 }
1857
1858 /*
1859  * Encode GETATTR request
1860  */
1861 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1862 {
1863         struct xdr_stream xdr;
1864         struct compound_hdr hdr = {
1865                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1866         };
1867
1868         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1869         encode_compound_hdr(&xdr, req, &hdr);
1870         encode_sequence(&xdr, &args->seq_args, &hdr);
1871         encode_putfh(&xdr, args->fh, &hdr);
1872         encode_getfattr(&xdr, args->bitmask, &hdr);
1873         encode_nops(&hdr);
1874         return 0;
1875 }
1876
1877 /*
1878  * Encode a CLOSE request
1879  */
1880 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1881 {
1882         struct xdr_stream xdr;
1883         struct compound_hdr hdr = {
1884                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1885         };
1886
1887         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1888         encode_compound_hdr(&xdr, req, &hdr);
1889         encode_sequence(&xdr, &args->seq_args, &hdr);
1890         encode_putfh(&xdr, args->fh, &hdr);
1891         encode_close(&xdr, args, &hdr);
1892         encode_getfattr(&xdr, args->bitmask, &hdr);
1893         encode_nops(&hdr);
1894         return 0;
1895 }
1896
1897 /*
1898  * Encode an OPEN request
1899  */
1900 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1901 {
1902         struct xdr_stream xdr;
1903         struct compound_hdr hdr = {
1904                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1905         };
1906
1907         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1908         encode_compound_hdr(&xdr, req, &hdr);
1909         encode_sequence(&xdr, &args->seq_args, &hdr);
1910         encode_putfh(&xdr, args->fh, &hdr);
1911         encode_savefh(&xdr, &hdr);
1912         encode_open(&xdr, args, &hdr);
1913         encode_getfh(&xdr, &hdr);
1914         encode_getfattr(&xdr, args->bitmask, &hdr);
1915         encode_restorefh(&xdr, &hdr);
1916         encode_getfattr(&xdr, args->bitmask, &hdr);
1917         encode_nops(&hdr);
1918         return 0;
1919 }
1920
1921 /*
1922  * Encode an OPEN_CONFIRM request
1923  */
1924 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1925 {
1926         struct xdr_stream xdr;
1927         struct compound_hdr hdr = {
1928                 .nops   = 0,
1929         };
1930
1931         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1932         encode_compound_hdr(&xdr, req, &hdr);
1933         encode_putfh(&xdr, args->fh, &hdr);
1934         encode_open_confirm(&xdr, args, &hdr);
1935         encode_nops(&hdr);
1936         return 0;
1937 }
1938
1939 /*
1940  * Encode an OPEN request with no attributes.
1941  */
1942 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1943 {
1944         struct xdr_stream xdr;
1945         struct compound_hdr hdr = {
1946                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1947         };
1948
1949         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1950         encode_compound_hdr(&xdr, req, &hdr);
1951         encode_sequence(&xdr, &args->seq_args, &hdr);
1952         encode_putfh(&xdr, args->fh, &hdr);
1953         encode_open(&xdr, args, &hdr);
1954         encode_getfattr(&xdr, args->bitmask, &hdr);
1955         encode_nops(&hdr);
1956         return 0;
1957 }
1958
1959 /*
1960  * Encode an OPEN_DOWNGRADE request
1961  */
1962 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1963 {
1964         struct xdr_stream xdr;
1965         struct compound_hdr hdr = {
1966                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1967         };
1968
1969         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1970         encode_compound_hdr(&xdr, req, &hdr);
1971         encode_sequence(&xdr, &args->seq_args, &hdr);
1972         encode_putfh(&xdr, args->fh, &hdr);
1973         encode_open_downgrade(&xdr, args, &hdr);
1974         encode_getfattr(&xdr, args->bitmask, &hdr);
1975         encode_nops(&hdr);
1976         return 0;
1977 }
1978
1979 /*
1980  * Encode a LOCK request
1981  */
1982 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1983 {
1984         struct xdr_stream xdr;
1985         struct compound_hdr hdr = {
1986                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1987         };
1988
1989         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1990         encode_compound_hdr(&xdr, req, &hdr);
1991         encode_sequence(&xdr, &args->seq_args, &hdr);
1992         encode_putfh(&xdr, args->fh, &hdr);
1993         encode_lock(&xdr, args, &hdr);
1994         encode_nops(&hdr);
1995         return 0;
1996 }
1997
1998 /*
1999  * Encode a LOCKT request
2000  */
2001 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2002 {
2003         struct xdr_stream xdr;
2004         struct compound_hdr hdr = {
2005                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2006         };
2007
2008         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2009         encode_compound_hdr(&xdr, req, &hdr);
2010         encode_sequence(&xdr, &args->seq_args, &hdr);
2011         encode_putfh(&xdr, args->fh, &hdr);
2012         encode_lockt(&xdr, args, &hdr);
2013         encode_nops(&hdr);
2014         return 0;
2015 }
2016
2017 /*
2018  * Encode a LOCKU request
2019  */
2020 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2021 {
2022         struct xdr_stream xdr;
2023         struct compound_hdr hdr = {
2024                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2025         };
2026
2027         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2028         encode_compound_hdr(&xdr, req, &hdr);
2029         encode_sequence(&xdr, &args->seq_args, &hdr);
2030         encode_putfh(&xdr, args->fh, &hdr);
2031         encode_locku(&xdr, args, &hdr);
2032         encode_nops(&hdr);
2033         return 0;
2034 }
2035
2036 /*
2037  * Encode a READLINK request
2038  */
2039 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2040 {
2041         struct xdr_stream xdr;
2042         struct compound_hdr hdr = {
2043                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2044         };
2045
2046         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2047         encode_compound_hdr(&xdr, req, &hdr);
2048         encode_sequence(&xdr, &args->seq_args, &hdr);
2049         encode_putfh(&xdr, args->fh, &hdr);
2050         encode_readlink(&xdr, args, req, &hdr);
2051
2052         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2053                         args->pgbase, args->pglen);
2054         encode_nops(&hdr);
2055         return 0;
2056 }
2057
2058 /*
2059  * Encode a READDIR request
2060  */
2061 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2062 {
2063         struct xdr_stream xdr;
2064         struct compound_hdr hdr = {
2065                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2066         };
2067
2068         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2069         encode_compound_hdr(&xdr, req, &hdr);
2070         encode_sequence(&xdr, &args->seq_args, &hdr);
2071         encode_putfh(&xdr, args->fh, &hdr);
2072         encode_readdir(&xdr, args, req, &hdr);
2073
2074         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2075                          args->pgbase, args->count);
2076         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2077                         __func__, hdr.replen << 2, args->pages,
2078                         args->pgbase, args->count);
2079         encode_nops(&hdr);
2080         return 0;
2081 }
2082
2083 /*
2084  * Encode a READ request
2085  */
2086 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2087 {
2088         struct xdr_stream xdr;
2089         struct compound_hdr hdr = {
2090                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2091         };
2092
2093         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2094         encode_compound_hdr(&xdr, req, &hdr);
2095         encode_sequence(&xdr, &args->seq_args, &hdr);
2096         encode_putfh(&xdr, args->fh, &hdr);
2097         encode_read(&xdr, args, &hdr);
2098
2099         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2100                          args->pages, args->pgbase, args->count);
2101         req->rq_rcv_buf.flags |= XDRBUF_READ;
2102         encode_nops(&hdr);
2103         return 0;
2104 }
2105
2106 /*
2107  * Encode an SETATTR request
2108  */
2109 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2110 {
2111         struct xdr_stream xdr;
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115
2116         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2117         encode_compound_hdr(&xdr, req, &hdr);
2118         encode_sequence(&xdr, &args->seq_args, &hdr);
2119         encode_putfh(&xdr, args->fh, &hdr);
2120         encode_setattr(&xdr, args, args->server, &hdr);
2121         encode_getfattr(&xdr, args->bitmask, &hdr);
2122         encode_nops(&hdr);
2123         return 0;
2124 }
2125
2126 /*
2127  * Encode a GETACL request
2128  */
2129 static int
2130 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2131                 struct nfs_getaclargs *args)
2132 {
2133         struct xdr_stream xdr;
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137         uint32_t replen;
2138
2139         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140         encode_compound_hdr(&xdr, req, &hdr);
2141         encode_sequence(&xdr, &args->seq_args, &hdr);
2142         encode_putfh(&xdr, args->fh, &hdr);
2143         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2144         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2145
2146         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2147                 args->acl_pages, args->acl_pgbase, args->acl_len);
2148         encode_nops(&hdr);
2149         return 0;
2150 }
2151
2152 /*
2153  * Encode a WRITE request
2154  */
2155 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2156 {
2157         struct xdr_stream xdr;
2158         struct compound_hdr hdr = {
2159                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160         };
2161
2162         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2163         encode_compound_hdr(&xdr, req, &hdr);
2164         encode_sequence(&xdr, &args->seq_args, &hdr);
2165         encode_putfh(&xdr, args->fh, &hdr);
2166         encode_write(&xdr, args, &hdr);
2167         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2168         encode_getfattr(&xdr, args->bitmask, &hdr);
2169         encode_nops(&hdr);
2170         return 0;
2171 }
2172
2173 /*
2174  *  a COMMIT request
2175  */
2176 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2177 {
2178         struct xdr_stream xdr;
2179         struct compound_hdr hdr = {
2180                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2181         };
2182
2183         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2184         encode_compound_hdr(&xdr, req, &hdr);
2185         encode_sequence(&xdr, &args->seq_args, &hdr);
2186         encode_putfh(&xdr, args->fh, &hdr);
2187         encode_commit(&xdr, args, &hdr);
2188         encode_getfattr(&xdr, args->bitmask, &hdr);
2189         encode_nops(&hdr);
2190         return 0;
2191 }
2192
2193 /*
2194  * FSINFO request
2195  */
2196 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2197 {
2198         struct xdr_stream xdr;
2199         struct compound_hdr hdr = {
2200                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2201         };
2202
2203         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2204         encode_compound_hdr(&xdr, req, &hdr);
2205         encode_sequence(&xdr, &args->seq_args, &hdr);
2206         encode_putfh(&xdr, args->fh, &hdr);
2207         encode_fsinfo(&xdr, args->bitmask, &hdr);
2208         encode_nops(&hdr);
2209         return 0;
2210 }
2211
2212 /*
2213  * a PATHCONF request
2214  */
2215 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2216 {
2217         struct xdr_stream xdr;
2218         struct compound_hdr hdr = {
2219                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2220         };
2221
2222         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2223         encode_compound_hdr(&xdr, req, &hdr);
2224         encode_sequence(&xdr, &args->seq_args, &hdr);
2225         encode_putfh(&xdr, args->fh, &hdr);
2226         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2227                            &hdr);
2228         encode_nops(&hdr);
2229         return 0;
2230 }
2231
2232 /*
2233  * a STATFS request
2234  */
2235 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2236 {
2237         struct xdr_stream xdr;
2238         struct compound_hdr hdr = {
2239                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240         };
2241
2242         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243         encode_compound_hdr(&xdr, req, &hdr);
2244         encode_sequence(&xdr, &args->seq_args, &hdr);
2245         encode_putfh(&xdr, args->fh, &hdr);
2246         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2247                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2248         encode_nops(&hdr);
2249         return 0;
2250 }
2251
2252 /*
2253  * GETATTR_BITMAP request
2254  */
2255 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2256                                     struct nfs4_server_caps_arg *args)
2257 {
2258         struct xdr_stream xdr;
2259         struct compound_hdr hdr = {
2260                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261         };
2262
2263         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2264         encode_compound_hdr(&xdr, req, &hdr);
2265         encode_sequence(&xdr, &args->seq_args, &hdr);
2266         encode_putfh(&xdr, args->fhandle, &hdr);
2267         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2268                            FATTR4_WORD0_LINK_SUPPORT|
2269                            FATTR4_WORD0_SYMLINK_SUPPORT|
2270                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2271         encode_nops(&hdr);
2272         return 0;
2273 }
2274
2275 /*
2276  * a RENEW request
2277  */
2278 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2279 {
2280         struct xdr_stream xdr;
2281         struct compound_hdr hdr = {
2282                 .nops   = 0,
2283         };
2284
2285         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2286         encode_compound_hdr(&xdr, req, &hdr);
2287         encode_renew(&xdr, clp, &hdr);
2288         encode_nops(&hdr);
2289         return 0;
2290 }
2291
2292 /*
2293  * a SETCLIENTID request
2294  */
2295 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2296 {
2297         struct xdr_stream xdr;
2298         struct compound_hdr hdr = {
2299                 .nops   = 0,
2300         };
2301
2302         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2303         encode_compound_hdr(&xdr, req, &hdr);
2304         encode_setclientid(&xdr, sc, &hdr);
2305         encode_nops(&hdr);
2306         return 0;
2307 }
2308
2309 /*
2310  * a SETCLIENTID_CONFIRM request
2311  */
2312 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2313 {
2314         struct xdr_stream xdr;
2315         struct compound_hdr hdr = {
2316                 .nops   = 0,
2317         };
2318         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2319
2320         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2321         encode_compound_hdr(&xdr, req, &hdr);
2322         encode_setclientid_confirm(&xdr, clp, &hdr);
2323         encode_putrootfh(&xdr, &hdr);
2324         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2325         encode_nops(&hdr);
2326         return 0;
2327 }
2328
2329 /*
2330  * DELEGRETURN request
2331  */
2332 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2333 {
2334         struct xdr_stream xdr;
2335         struct compound_hdr hdr = {
2336                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2337         };
2338
2339         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2340         encode_compound_hdr(&xdr, req, &hdr);
2341         encode_sequence(&xdr, &args->seq_args, &hdr);
2342         encode_putfh(&xdr, args->fhandle, &hdr);
2343         encode_delegreturn(&xdr, args->stateid, &hdr);
2344         encode_getfattr(&xdr, args->bitmask, &hdr);
2345         encode_nops(&hdr);
2346         return 0;
2347 }
2348
2349 /*
2350  * Encode FS_LOCATIONS request
2351  */
2352 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2353 {
2354         struct xdr_stream xdr;
2355         struct compound_hdr hdr = {
2356                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2357         };
2358         uint32_t replen;
2359
2360         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2361         encode_compound_hdr(&xdr, req, &hdr);
2362         encode_sequence(&xdr, &args->seq_args, &hdr);
2363         encode_putfh(&xdr, args->dir_fh, &hdr);
2364         encode_lookup(&xdr, args->name, &hdr);
2365         replen = hdr.replen;    /* get the attribute into args->page */
2366         encode_fs_locations(&xdr, args->bitmask, &hdr);
2367
2368         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2369                         0, PAGE_SIZE);
2370         encode_nops(&hdr);
2371         return 0;
2372 }
2373
2374 #if defined(CONFIG_NFS_V4_1)
2375 /*
2376  * EXCHANGE_ID request
2377  */
2378 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2379                                     struct nfs41_exchange_id_args *args)
2380 {
2381         struct xdr_stream xdr;
2382         struct compound_hdr hdr = {
2383                 .minorversion = args->client->cl_minorversion,
2384         };
2385
2386         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2387         encode_compound_hdr(&xdr, req, &hdr);
2388         encode_exchange_id(&xdr, args, &hdr);
2389         encode_nops(&hdr);
2390         return 0;
2391 }
2392
2393 /*
2394  * a CREATE_SESSION request
2395  */
2396 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2397                                        struct nfs41_create_session_args *args)
2398 {
2399         struct xdr_stream xdr;
2400         struct compound_hdr hdr = {
2401                 .minorversion = args->client->cl_minorversion,
2402         };
2403
2404         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2405         encode_compound_hdr(&xdr, req, &hdr);
2406         encode_create_session(&xdr, args, &hdr);
2407         encode_nops(&hdr);
2408         return 0;
2409 }
2410
2411 /*
2412  * a DESTROY_SESSION request
2413  */
2414 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2415                                         struct nfs4_session *session)
2416 {
2417         struct xdr_stream xdr;
2418         struct compound_hdr hdr = {
2419                 .minorversion = session->clp->cl_minorversion,
2420         };
2421
2422         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2423         encode_compound_hdr(&xdr, req, &hdr);
2424         encode_destroy_session(&xdr, session, &hdr);
2425         encode_nops(&hdr);
2426         return 0;
2427 }
2428
2429 /*
2430  * a SEQUENCE request
2431  */
2432 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2433                                  struct nfs4_sequence_args *args)
2434 {
2435         struct xdr_stream xdr;
2436         struct compound_hdr hdr = {
2437                 .minorversion = nfs4_xdr_minorversion(args),
2438         };
2439
2440         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2441         encode_compound_hdr(&xdr, req, &hdr);
2442         encode_sequence(&xdr, args, &hdr);
2443         encode_nops(&hdr);
2444         return 0;
2445 }
2446
2447 /*
2448  * a GET_LEASE_TIME request
2449  */
2450 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2451                                        struct nfs4_get_lease_time_args *args)
2452 {
2453         struct xdr_stream xdr;
2454         struct compound_hdr hdr = {
2455                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2456         };
2457         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2458
2459         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2460         encode_compound_hdr(&xdr, req, &hdr);
2461         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2462         encode_putrootfh(&xdr, &hdr);
2463         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2464         encode_nops(&hdr);
2465         return 0;
2466 }
2467 #endif /* CONFIG_NFS_V4_1 */
2468
2469 /*
2470  * START OF "GENERIC" DECODE ROUTINES.
2471  *   These may look a little ugly since they are imported from a "generic"
2472  * set of XDR encode/decode routines which are intended to be shared by
2473  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2474  *
2475  * If the pain of reading these is too great, it should be a straightforward
2476  * task to translate them into Linux-specific versions which are more
2477  * consistent with the style used in NFSv2/v3...
2478  */
2479 #define READ32(x)         (x) = ntohl(*p++)
2480 #define READ64(x)         do {                  \
2481         (x) = (u64)ntohl(*p++) << 32;           \
2482         (x) |= ntohl(*p++);                     \
2483 } while (0)
2484 #define READTIME(x)       do {                  \
2485         p++;                                    \
2486         (x.tv_sec) = ntohl(*p++);               \
2487         (x.tv_nsec) = ntohl(*p++);              \
2488 } while (0)
2489 #define COPYMEM(x,nbytes) do {                  \
2490         memcpy((x), p, nbytes);                 \
2491         p += XDR_QUADLEN(nbytes);               \
2492 } while (0)
2493
2494 #define READ_BUF(nbytes)  do { \
2495         p = xdr_inline_decode(xdr, nbytes); \
2496         if (unlikely(!p)) { \
2497                 dprintk("nfs: %s: prematurely hit end of receive" \
2498                                 " buffer\n", __func__); \
2499                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2500                                 __func__, xdr->p, nbytes, xdr->end); \
2501                 return -EIO; \
2502         } \
2503 } while (0)
2504
2505 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2506 {
2507         __be32 *p;
2508
2509         READ_BUF(4);
2510         READ32(*len);
2511         READ_BUF(*len);
2512         *string = (char *)p;
2513         return 0;
2514 }
2515
2516 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2517 {
2518         __be32 *p;
2519
2520         READ_BUF(8);
2521         READ32(hdr->status);
2522         READ32(hdr->taglen);
2523
2524         READ_BUF(hdr->taglen + 4);
2525         hdr->tag = (char *)p;
2526         p += XDR_QUADLEN(hdr->taglen);
2527         READ32(hdr->nops);
2528         if (unlikely(hdr->nops < 1))
2529                 return nfs4_stat_to_errno(hdr->status);
2530         return 0;
2531 }
2532
2533 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2534 {
2535         __be32 *p;
2536         uint32_t opnum;
2537         int32_t nfserr;
2538
2539         READ_BUF(8);
2540         READ32(opnum);
2541         if (opnum != expected) {
2542                 dprintk("nfs: Server returned operation"
2543                         " %d but we issued a request for %d\n",
2544                                 opnum, expected);
2545                 return -EIO;
2546         }
2547         READ32(nfserr);
2548         if (nfserr != NFS_OK)
2549                 return nfs4_stat_to_errno(nfserr);
2550         return 0;
2551 }
2552
2553 /* Dummy routine */
2554 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2555 {
2556         __be32 *p;
2557         unsigned int strlen;
2558         char *str;
2559
2560         READ_BUF(12);
2561         return decode_opaque_inline(xdr, &strlen, &str);
2562 }
2563
2564 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2565 {
2566         uint32_t bmlen;
2567         __be32 *p;
2568
2569         READ_BUF(4);
2570         READ32(bmlen);
2571
2572         bitmap[0] = bitmap[1] = 0;
2573         READ_BUF((bmlen << 2));
2574         if (bmlen > 0) {
2575                 READ32(bitmap[0]);
2576                 if (bmlen > 1)
2577                         READ32(bitmap[1]);
2578         }
2579         return 0;
2580 }
2581
2582 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2583 {
2584         __be32 *p;
2585
2586         READ_BUF(4);
2587         READ32(*attrlen);
2588         *savep = xdr->p;
2589         return 0;
2590 }
2591
2592 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2593 {
2594         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2595                 decode_attr_bitmap(xdr, bitmask);
2596                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2597         } else
2598                 bitmask[0] = bitmask[1] = 0;
2599         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2600         return 0;
2601 }
2602
2603 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2604 {
2605         __be32 *p;
2606         int ret = 0;
2607
2608         *type = 0;
2609         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2610                 return -EIO;
2611         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2612                 READ_BUF(4);
2613                 READ32(*type);
2614                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2615                         dprintk("%s: bad type %d\n", __func__, *type);
2616                         return -EIO;
2617                 }
2618                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2619                 ret = NFS_ATTR_FATTR_TYPE;
2620         }
2621         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2622         return ret;
2623 }
2624
2625 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2626 {
2627         __be32 *p;
2628         int ret = 0;
2629
2630         *change = 0;
2631         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2632                 return -EIO;
2633         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2634                 READ_BUF(8);
2635                 READ64(*change);
2636                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2637                 ret = NFS_ATTR_FATTR_CHANGE;
2638         }
2639         dprintk("%s: change attribute=%Lu\n", __func__,
2640                         (unsigned long long)*change);
2641         return ret;
2642 }
2643
2644 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2645 {
2646         __be32 *p;
2647         int ret = 0;
2648
2649         *size = 0;
2650         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2651                 return -EIO;
2652         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2653                 READ_BUF(8);
2654                 READ64(*size);
2655                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2656                 ret = NFS_ATTR_FATTR_SIZE;
2657         }
2658         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2659         return ret;
2660 }
2661
2662 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2663 {
2664         __be32 *p;
2665
2666         *res = 0;
2667         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2668                 return -EIO;
2669         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2670                 READ_BUF(4);
2671                 READ32(*res);
2672                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2673         }
2674         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2675         return 0;
2676 }
2677
2678 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2679 {
2680         __be32 *p;
2681
2682         *res = 0;
2683         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2684                 return -EIO;
2685         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2686                 READ_BUF(4);
2687                 READ32(*res);
2688                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2689         }
2690         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2691         return 0;
2692 }
2693
2694 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2695 {
2696         __be32 *p;
2697         int ret = 0;
2698
2699         fsid->major = 0;
2700         fsid->minor = 0;
2701         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2702                 return -EIO;
2703         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2704                 READ_BUF(16);
2705                 READ64(fsid->major);
2706                 READ64(fsid->minor);
2707                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2708                 ret = NFS_ATTR_FATTR_FSID;
2709         }
2710         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2711                         (unsigned long long)fsid->major,
2712                         (unsigned long long)fsid->minor);
2713         return ret;
2714 }
2715
2716 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2717 {
2718         __be32 *p;
2719
2720         *res = 60;
2721         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2722                 return -EIO;
2723         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2724                 READ_BUF(4);
2725                 READ32(*res);
2726                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2727         }
2728         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2729         return 0;
2730 }
2731
2732 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2733 {
2734         __be32 *p;
2735
2736         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2737         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2738                 return -EIO;
2739         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2740                 READ_BUF(4);
2741                 READ32(*res);
2742                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2743         }
2744         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2745         return 0;
2746 }
2747
2748 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2749 {
2750         __be32 *p;
2751         int ret = 0;
2752
2753         *fileid = 0;
2754         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2755                 return -EIO;
2756         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2757                 READ_BUF(8);
2758                 READ64(*fileid);
2759                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2760                 ret = NFS_ATTR_FATTR_FILEID;
2761         }
2762         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2763         return ret;
2764 }
2765
2766 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2767 {
2768         __be32 *p;
2769         int ret = 0;
2770
2771         *fileid = 0;
2772         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2773                 return -EIO;
2774         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2775                 READ_BUF(8);
2776                 READ64(*fileid);
2777                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2778                 ret = NFS_ATTR_FATTR_FILEID;
2779         }
2780         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2781         return ret;
2782 }
2783
2784 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2785 {
2786         __be32 *p;
2787         int status = 0;
2788
2789         *res = 0;
2790         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2791                 return -EIO;
2792         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2793                 READ_BUF(8);
2794                 READ64(*res);
2795                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2796         }
2797         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2798         return status;
2799 }
2800
2801 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2802 {
2803         __be32 *p;
2804         int status = 0;
2805
2806         *res = 0;
2807         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2808                 return -EIO;
2809         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2810                 READ_BUF(8);
2811                 READ64(*res);
2812                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2813         }
2814         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2815         return status;
2816 }
2817
2818 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2819 {
2820         __be32 *p;
2821         int status = 0;
2822
2823         *res = 0;
2824         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2825                 return -EIO;
2826         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2827                 READ_BUF(8);
2828                 READ64(*res);
2829                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2830         }
2831         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2832         return status;
2833 }
2834
2835 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2836 {
2837         u32 n;
2838         __be32 *p;
2839         int status = 0;
2840
2841         READ_BUF(4);
2842         READ32(n);
2843         if (n == 0)
2844                 goto root_path;
2845         dprintk("path ");
2846         path->ncomponents = 0;
2847         while (path->ncomponents < n) {
2848                 struct nfs4_string *component = &path->components[path->ncomponents];
2849                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2850                 if (unlikely(status != 0))
2851                         goto out_eio;
2852                 if (path->ncomponents != n)
2853                         dprintk("/");
2854                 dprintk("%s", component->data);
2855                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2856                         path->ncomponents++;
2857                 else {
2858                         dprintk("cannot parse %d components in path\n", n);
2859                         goto out_eio;
2860                 }
2861         }
2862 out:
2863         dprintk("\n");
2864         return status;
2865 root_path:
2866 /* a root pathname is sent as a zero component4 */
2867         path->ncomponents = 1;
2868         path->components[0].len=0;
2869         path->components[0].data=NULL;
2870         dprintk("path /\n");
2871         goto out;
2872 out_eio:
2873         dprintk(" status %d", status);
2874         status = -EIO;
2875         goto out;
2876 }
2877
2878 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2879 {
2880         int n;
2881         __be32 *p;
2882         int status = -EIO;
2883
2884         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2885                 goto out;
2886         status = 0;
2887         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2888                 goto out;
2889         dprintk("%s: fsroot ", __func__);
2890         status = decode_pathname(xdr, &res->fs_path);
2891         if (unlikely(status != 0))
2892                 goto out;
2893         READ_BUF(4);
2894         READ32(n);
2895         if (n <= 0)
2896                 goto out_eio;
2897         res->nlocations = 0;
2898         while (res->nlocations < n) {
2899                 u32 m;
2900                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2901
2902                 READ_BUF(4);
2903                 READ32(m);
2904
2905                 loc->nservers = 0;
2906                 dprintk("%s: servers ", __func__);
2907                 while (loc->nservers < m) {
2908                         struct nfs4_string *server = &loc->servers[loc->nservers];
2909                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2910                         if (unlikely(status != 0))
2911                                 goto out_eio;
2912                         dprintk("%s ", server->data);
2913                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2914                                 loc->nservers++;
2915                         else {
2916                                 unsigned int i;
2917                                 dprintk("%s: using first %u of %u servers "
2918                                         "returned for location %u\n",
2919                                                 __func__,
2920                                                 NFS4_FS_LOCATION_MAXSERVERS,
2921                                                 m, res->nlocations);
2922                                 for (i = loc->nservers; i < m; i++) {
2923                                         unsigned int len;
2924                                         char *data;
2925                                         status = decode_opaque_inline(xdr, &len, &data);
2926                                         if (unlikely(status != 0))
2927                                                 goto out_eio;
2928                                 }
2929                         }
2930                 }
2931                 status = decode_pathname(xdr, &loc->rootpath);
2932                 if (unlikely(status != 0))
2933                         goto out_eio;
2934                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2935                         res->nlocations++;
2936         }
2937         if (res->nlocations != 0)
2938                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2939 out:
2940         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2941         return status;
2942 out_eio:
2943         status = -EIO;
2944         goto out;
2945 }
2946
2947 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2948 {
2949         __be32 *p;
2950         int status = 0;
2951
2952         *res = 0;
2953         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2954                 return -EIO;
2955         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2956                 READ_BUF(8);
2957                 READ64(*res);
2958                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2959         }
2960         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2961         return status;
2962 }
2963
2964 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2965 {
2966         __be32 *p;
2967         int status = 0;
2968
2969         *maxlink = 1;
2970         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2971                 return -EIO;
2972         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2973                 READ_BUF(4);
2974                 READ32(*maxlink);
2975                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2976         }
2977         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2978         return status;
2979 }
2980
2981 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2982 {
2983         __be32 *p;
2984         int status = 0;
2985
2986         *maxname = 1024;
2987         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2988                 return -EIO;
2989         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2990                 READ_BUF(4);
2991                 READ32(*maxname);
2992                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2993         }
2994         dprintk("%s: maxname=%u\n", __func__, *maxname);
2995         return status;
2996 }
2997
2998 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2999 {
3000         __be32 *p;
3001         int status = 0;
3002
3003         *res = 1024;
3004         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3005                 return -EIO;
3006         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3007                 uint64_t maxread;
3008                 READ_BUF(8);
3009                 READ64(maxread);
3010                 if (maxread > 0x7FFFFFFF)
3011                         maxread = 0x7FFFFFFF;
3012                 *res = (uint32_t)maxread;
3013                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3014         }
3015         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3016         return status;
3017 }
3018
3019 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3020 {
3021         __be32 *p;
3022         int status = 0;
3023
3024         *res = 1024;
3025         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3026                 return -EIO;
3027         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3028                 uint64_t maxwrite;
3029                 READ_BUF(8);
3030                 READ64(maxwrite);
3031                 if (maxwrite > 0x7FFFFFFF)
3032                         maxwrite = 0x7FFFFFFF;
3033                 *res = (uint32_t)maxwrite;
3034                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3035         }
3036         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3037         return status;
3038 }
3039
3040 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3041 {
3042         uint32_t tmp;
3043         __be32 *p;
3044         int ret = 0;
3045
3046         *mode = 0;
3047         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3048                 return -EIO;
3049         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3050                 READ_BUF(4);
3051                 READ32(tmp);
3052                 *mode = tmp & ~S_IFMT;
3053                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3054                 ret = NFS_ATTR_FATTR_MODE;
3055         }
3056         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3057         return ret;
3058 }
3059
3060 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3061 {
3062         __be32 *p;
3063         int ret = 0;
3064
3065         *nlink = 1;
3066         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3067                 return -EIO;
3068         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3069                 READ_BUF(4);
3070                 READ32(*nlink);
3071                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3072                 ret = NFS_ATTR_FATTR_NLINK;
3073         }
3074         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3075         return ret;
3076 }
3077
3078 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3079                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3080 {
3081         uint32_t len;
3082         __be32 *p;
3083         int ret = 0;
3084
3085         *uid = -2;
3086         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3087                 return -EIO;
3088         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3089                 READ_BUF(4);
3090                 READ32(len);
3091                 READ_BUF(len);
3092                 if (!may_sleep) {
3093                         /* do nothing */
3094                 } else if (len < XDR_MAX_NETOBJ) {
3095                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3096                                 ret = NFS_ATTR_FATTR_OWNER;
3097                         else
3098                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3099                                                 __func__);
3100                 } else
3101                         dprintk("%s: name too long (%u)!\n",
3102                                         __func__, len);
3103                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3104         }
3105         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3106         return ret;
3107 }
3108
3109 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3110                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3111 {
3112         uint32_t len;
3113         __be32 *p;
3114         int ret = 0;
3115
3116         *gid = -2;
3117         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3118                 return -EIO;
3119         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3120                 READ_BUF(4);
3121                 READ32(len);
3122                 READ_BUF(len);
3123                 if (!may_sleep) {
3124                         /* do nothing */
3125                 } else if (len < XDR_MAX_NETOBJ) {
3126                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3127                                 ret = NFS_ATTR_FATTR_GROUP;
3128                         else
3129                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3130                                                 __func__);
3131                 } else
3132                         dprintk("%s: name too long (%u)!\n",
3133                                         __func__, len);
3134                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3135         }
3136         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3137         return ret;
3138 }
3139
3140 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3141 {
3142         uint32_t major = 0, minor = 0;
3143         __be32 *p;
3144         int ret = 0;
3145
3146         *rdev = MKDEV(0,0);
3147         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3148                 return -EIO;
3149         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3150                 dev_t tmp;
3151
3152                 READ_BUF(8);
3153                 READ32(major);
3154                 READ32(minor);
3155                 tmp = MKDEV(major, minor);
3156                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3157                         *rdev = tmp;
3158                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3159                 ret = NFS_ATTR_FATTR_RDEV;
3160         }
3161         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3162         return ret;
3163 }
3164
3165 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3166 {
3167         __be32 *p;
3168         int status = 0;
3169
3170         *res = 0;
3171         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3172                 return -EIO;
3173         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3174                 READ_BUF(8);
3175                 READ64(*res);
3176                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3177         }
3178         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3179         return status;
3180 }
3181
3182 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3183 {
3184         __be32 *p;
3185         int status = 0;
3186
3187         *res = 0;
3188         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3189                 return -EIO;
3190         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3191                 READ_BUF(8);
3192                 READ64(*res);
3193                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3194         }
3195         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3196         return status;
3197 }
3198
3199 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3200 {
3201         __be32 *p;
3202         int status = 0;
3203
3204         *res = 0;
3205         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3206                 return -EIO;
3207         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3208                 READ_BUF(8);
3209                 READ64(*res);
3210                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3211         }
3212         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3213         return status;
3214 }
3215
3216 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3217 {
3218         __be32 *p;
3219         int ret = 0;
3220
3221         *used = 0;
3222         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3223                 return -EIO;
3224         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3225                 READ_BUF(8);
3226                 READ64(*used);
3227                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3228                 ret = NFS_ATTR_FATTR_SPACE_USED;
3229         }
3230         dprintk("%s: space used=%Lu\n", __func__,
3231                         (unsigned long long)*used);
3232         return ret;
3233 }
3234
3235 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3236 {
3237         __be32 *p;
3238         uint64_t sec;
3239         uint32_t nsec;
3240
3241         READ_BUF(12);
3242         READ64(sec);
3243         READ32(nsec);
3244         time->tv_sec = (time_t)sec;
3245         time->tv_nsec = (long)nsec;
3246         return 0;
3247 }
3248
3249 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3250 {
3251         int status = 0;
3252
3253         time->tv_sec = 0;
3254         time->tv_nsec = 0;
3255         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3256                 return -EIO;
3257         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3258                 status = decode_attr_time(xdr, time);
3259                 if (status == 0)
3260                         status = NFS_ATTR_FATTR_ATIME;
3261                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3262         }
3263         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3264         return status;
3265 }
3266
3267 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3268 {
3269         int status = 0;
3270
3271         time->tv_sec = 0;
3272         time->tv_nsec = 0;
3273         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3274                 return -EIO;
3275         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3276                 status = decode_attr_time(xdr, time);
3277                 if (status == 0)
3278                         status = NFS_ATTR_FATTR_CTIME;
3279                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3280         }
3281         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3282         return status;
3283 }
3284
3285 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3286 {
3287         int status = 0;
3288
3289         time->tv_sec = 0;
3290         time->tv_nsec = 0;
3291         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3292                 return -EIO;
3293         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3294                 status = decode_attr_time(xdr, time);
3295                 if (status == 0)
3296                         status = NFS_ATTR_FATTR_MTIME;
3297                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3298         }
3299         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3300         return status;
3301 }
3302
3303 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3304 {
3305         unsigned int attrwords = XDR_QUADLEN(attrlen);
3306         unsigned int nwords = xdr->p - savep;
3307
3308         if (unlikely(attrwords != nwords)) {
3309                 dprintk("%s: server returned incorrect attribute length: "
3310                         "%u %c %u\n",
3311                                 __func__,
3312                                 attrwords << 2,
3313                                 (attrwords < nwords) ? '<' : '>',
3314                                 nwords << 2);
3315                 return -EIO;
3316         }
3317         return 0;
3318 }
3319
3320 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3321 {
3322         __be32 *p;
3323
3324         READ_BUF(20);
3325         READ32(cinfo->atomic);
3326         READ64(cinfo->before);
3327         READ64(cinfo->after);
3328         return 0;
3329 }
3330
3331 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3332 {
3333         __be32 *p;
3334         uint32_t supp, acc;
3335         int status;
3336
3337         status = decode_op_hdr(xdr, OP_ACCESS);
3338         if (status)
3339                 return status;
3340         READ_BUF(8);
3341         READ32(supp);
3342         READ32(acc);
3343         access->supported = supp;
3344         access->access = acc;
3345         return 0;
3346 }
3347
3348 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3349 {
3350         __be32 *p;
3351         int status;
3352
3353         status = decode_op_hdr(xdr, OP_CLOSE);
3354         if (status != -EIO)
3355                 nfs_increment_open_seqid(status, res->seqid);
3356         if (status)
3357                 return status;
3358         READ_BUF(NFS4_STATEID_SIZE);
3359         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3360         return 0;
3361 }
3362
3363 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3364 {
3365         __be32 *p;
3366         int status;
3367
3368         status = decode_op_hdr(xdr, OP_COMMIT);
3369         if (status)
3370                 return status;
3371         READ_BUF(8);
3372         COPYMEM(res->verf->verifier, 8);
3373         return 0;
3374 }
3375
3376 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3377 {
3378         __be32 *p;
3379         uint32_t bmlen;
3380         int status;
3381
3382         status = decode_op_hdr(xdr, OP_CREATE);
3383         if (status)
3384                 return status;
3385         if ((status = decode_change_info(xdr, cinfo)))
3386                 return status;
3387         READ_BUF(4);
3388         READ32(bmlen);
3389         READ_BUF(bmlen << 2);
3390         return 0;
3391 }
3392
3393 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3394 {
3395         __be32 *savep;
3396         uint32_t attrlen, bitmap[2] = {0};
3397         int status;
3398
3399         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3400                 goto xdr_error;
3401         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3402                 goto xdr_error;
3403         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3404                 goto xdr_error;
3405         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3406                 goto xdr_error;
3407         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3408                 goto xdr_error;
3409         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3410                 goto xdr_error;
3411         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3412                 goto xdr_error;
3413         status = verify_attr_len(xdr, savep, attrlen);
3414 xdr_error:
3415         dprintk("%s: xdr returned %d!\n", __func__, -status);
3416         return status;
3417 }
3418
3419 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3420 {
3421         __be32 *savep;
3422         uint32_t attrlen, bitmap[2] = {0};
3423         int status;
3424
3425         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3426                 goto xdr_error;
3427         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3428                 goto xdr_error;
3429         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3430                 goto xdr_error;
3431
3432         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3433                 goto xdr_error;
3434         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3435                 goto xdr_error;
3436         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3437                 goto xdr_error;
3438         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3439                 goto xdr_error;
3440         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3441                 goto xdr_error;
3442         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3443                 goto xdr_error;
3444
3445         status = verify_attr_len(xdr, savep, attrlen);
3446 xdr_error:
3447         dprintk("%s: xdr returned %d!\n", __func__, -status);
3448         return status;
3449 }
3450
3451 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3452 {
3453         __be32 *savep;
3454         uint32_t attrlen, bitmap[2] = {0};
3455         int status;
3456
3457         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3458                 goto xdr_error;
3459         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3460                 goto xdr_error;
3461         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3462                 goto xdr_error;
3463
3464         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3465                 goto xdr_error;
3466         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3467                 goto xdr_error;
3468
3469         status = verify_attr_len(xdr, savep, attrlen);
3470 xdr_error:
3471         dprintk("%s: xdr returned %d!\n", __func__, -status);
3472         return status;
3473 }
3474
3475 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3476                 const struct nfs_server *server, int may_sleep)
3477 {
3478         __be32 *savep;
3479         uint32_t attrlen,
3480                  bitmap[2] = {0},
3481                  type;
3482         int status;
3483         umode_t fmode = 0;
3484         uint64_t fileid;
3485
3486         status = decode_op_hdr(xdr, OP_GETATTR);
3487         if (status < 0)
3488                 goto xdr_error;
3489
3490         status = decode_attr_bitmap(xdr, bitmap);
3491         if (status < 0)
3492                 goto xdr_error;
3493
3494         status = decode_attr_length(xdr, &attrlen, &savep);
3495         if (status < 0)
3496                 goto xdr_error;
3497
3498
3499         status = decode_attr_type(xdr, bitmap, &type);
3500         if (status < 0)
3501                 goto xdr_error;
3502         fattr->mode = 0;
3503         if (status != 0) {
3504                 fattr->mode |= nfs_type2fmt[type];
3505                 fattr->valid |= status;
3506         }
3507
3508         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3509         if (status < 0)
3510                 goto xdr_error;
3511         fattr->valid |= status;
3512
3513         status = decode_attr_size(xdr, bitmap, &fattr->size);
3514         if (status < 0)
3515                 goto xdr_error;
3516         fattr->valid |= status;
3517
3518         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3519         if (status < 0)
3520                 goto xdr_error;
3521         fattr->valid |= status;
3522
3523         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3524         if (status < 0)
3525                 goto xdr_error;
3526         fattr->valid |= status;
3527
3528         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3529                                                 struct nfs4_fs_locations,
3530                                                 fattr));
3531         if (status < 0)
3532                 goto xdr_error;
3533         fattr->valid |= status;
3534
3535         status = decode_attr_mode(xdr, bitmap, &fmode);
3536         if (status < 0)
3537                 goto xdr_error;
3538         if (status != 0) {
3539                 fattr->mode |= fmode;
3540                 fattr->valid |= status;
3541         }
3542
3543         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3544         if (status < 0)
3545                 goto xdr_error;
3546         fattr->valid |= status;
3547
3548         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3549                         &fattr->uid, may_sleep);
3550         if (status < 0)
3551                 goto xdr_error;
3552         fattr->valid |= status;
3553
3554         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3555                         &fattr->gid, may_sleep);
3556         if (status < 0)
3557                 goto xdr_error;
3558         fattr->valid |= status;
3559
3560         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3561         if (status < 0)
3562                 goto xdr_error;
3563         fattr->valid |= status;
3564
3565         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3566         if (status < 0)
3567                 goto xdr_error;
3568         fattr->valid |= status;
3569
3570         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3571         if (status < 0)
3572                 goto xdr_error;
3573         fattr->valid |= status;
3574
3575         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3576         if (status < 0)
3577                 goto xdr_error;
3578         fattr->valid |= status;
3579
3580         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3581         if (status < 0)
3582                 goto xdr_error;
3583         fattr->valid |= status;
3584
3585         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3586         if (status < 0)
3587                 goto xdr_error;
3588         if (status != 0 && !(fattr->valid & status)) {
3589                 fattr->fileid = fileid;
3590                 fattr->valid |= status;
3591         }
3592
3593         status = verify_attr_len(xdr, savep, attrlen);
3594 xdr_error:
3595         dprintk("%s: xdr returned %d\n", __func__, -status);
3596         return status;
3597 }
3598
3599
3600 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3601 {
3602         __be32 *savep;
3603         uint32_t attrlen, bitmap[2];
3604         int status;
3605
3606         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3607                 goto xdr_error;
3608         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3609                 goto xdr_error;
3610         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3611                 goto xdr_error;
3612
3613         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3614
3615         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3616                 goto xdr_error;
3617         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3618                 goto xdr_error;
3619         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3620                 goto xdr_error;
3621         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3622         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3623                 goto xdr_error;
3624         fsinfo->wtpref = fsinfo->wtmax;
3625
3626         status = verify_attr_len(xdr, savep, attrlen);
3627 xdr_error:
3628         dprintk("%s: xdr returned %d!\n", __func__, -status);
3629         return status;
3630 }
3631
3632 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3633 {
3634         __be32 *p;
3635         uint32_t len;
3636         int status;
3637
3638         /* Zero handle first to allow comparisons */
3639         memset(fh, 0, sizeof(*fh));
3640
3641         status = decode_op_hdr(xdr, OP_GETFH);
3642         if (status)
3643                 return status;
3644
3645         READ_BUF(4);
3646         READ32(len);
3647         if (len > NFS4_FHSIZE)
3648                 return -EIO;
3649         fh->size = len;
3650         READ_BUF(len);
3651         COPYMEM(fh->data, len);
3652         return 0;
3653 }
3654
3655 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3656 {
3657         int status;
3658
3659         status = decode_op_hdr(xdr, OP_LINK);
3660         if (status)
3661                 return status;
3662         return decode_change_info(xdr, cinfo);
3663 }
3664
3665 /*
3666  * We create the owner, so we know a proper owner.id length is 4.
3667  */
3668 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3669 {
3670         uint64_t offset, length, clientid;
3671         __be32 *p;
3672         uint32_t namelen, type;
3673
3674         READ_BUF(32);
3675         READ64(offset);
3676         READ64(length);
3677         READ32(type);
3678         if (fl != NULL) {
3679                 fl->fl_start = (loff_t)offset;
3680                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3681                 if (length == ~(uint64_t)0)
3682                         fl->fl_end = OFFSET_MAX;
3683                 fl->fl_type = F_WRLCK;
3684                 if (type & 1)
3685                         fl->fl_type = F_RDLCK;
3686                 fl->fl_pid = 0;
3687         }
3688         READ64(clientid);
3689         READ32(namelen);
3690         READ_BUF(namelen);
3691         return -NFS4ERR_DENIED;
3692 }
3693
3694 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3695 {
3696         __be32 *p;
3697         int status;
3698
3699         status = decode_op_hdr(xdr, OP_LOCK);
3700         if (status == -EIO)
3701                 goto out;
3702         if (status == 0) {
3703                 READ_BUF(NFS4_STATEID_SIZE);
3704                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3705         } else if (status == -NFS4ERR_DENIED)
3706                 status = decode_lock_denied(xdr, NULL);
3707         if (res->open_seqid != NULL)
3708                 nfs_increment_open_seqid(status, res->open_seqid);
3709         nfs_increment_lock_seqid(status, res->lock_seqid);
3710 out:
3711         return status;
3712 }
3713
3714 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3715 {
3716         int status;
3717         status = decode_op_hdr(xdr, OP_LOCKT);
3718         if (status == -NFS4ERR_DENIED)
3719                 return decode_lock_denied(xdr, res->denied);
3720         return status;
3721 }
3722
3723 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3724 {
3725         __be32 *p;
3726         int status;
3727
3728         status = decode_op_hdr(xdr, OP_LOCKU);
3729         if (status != -EIO)
3730                 nfs_increment_lock_seqid(status, res->seqid);
3731         if (status == 0) {
3732                 READ_BUF(NFS4_STATEID_SIZE);
3733                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3734         }
3735         return status;
3736 }
3737
3738 static int decode_lookup(struct xdr_stream *xdr)
3739 {
3740         return decode_op_hdr(xdr, OP_LOOKUP);
3741 }
3742
3743 /* This is too sick! */
3744 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3745 {
3746         __be32 *p;
3747         uint32_t limit_type, nblocks, blocksize;
3748
3749         READ_BUF(12);
3750         READ32(limit_type);
3751         switch (limit_type) {
3752         case 1:
3753                 READ64(*maxsize);
3754                 break;
3755         case 2:
3756                 READ32(nblocks);
3757                 READ32(blocksize);
3758                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3759         }
3760         return 0;
3761 }
3762
3763 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3764 {
3765         __be32 *p;
3766         uint32_t delegation_type;
3767
3768         READ_BUF(4);
3769         READ32(delegation_type);
3770         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3771                 res->delegation_type = 0;
3772                 return 0;
3773         }
3774         READ_BUF(NFS4_STATEID_SIZE+4);
3775         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3776         READ32(res->do_recall);
3777
3778         switch (delegation_type) {
3779         case NFS4_OPEN_DELEGATE_READ:
3780                 res->delegation_type = FMODE_READ;
3781                 break;
3782         case NFS4_OPEN_DELEGATE_WRITE:
3783                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3784                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3785                                 return -EIO;
3786         }
3787         return decode_ace(xdr, NULL, res->server->nfs_client);
3788 }
3789
3790 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3791 {
3792         __be32 *p;
3793         uint32_t savewords, bmlen, i;
3794         int status;
3795
3796         status = decode_op_hdr(xdr, OP_OPEN);
3797         if (status != -EIO)
3798                 nfs_increment_open_seqid(status, res->seqid);
3799         if (status)
3800                 return status;
3801         READ_BUF(NFS4_STATEID_SIZE);
3802         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3803
3804         decode_change_info(xdr, &res->cinfo);
3805
3806         READ_BUF(8);
3807         READ32(res->rflags);
3808         READ32(bmlen);
3809         if (bmlen > 10)
3810                 goto xdr_error;
3811
3812         READ_BUF(bmlen << 2);
3813         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3814         for (i = 0; i < savewords; ++i)
3815                 READ32(res->attrset[i]);
3816         for (; i < NFS4_BITMAP_SIZE; i++)
3817                 res->attrset[i] = 0;
3818
3819         return decode_delegation(xdr, res);
3820 xdr_error:
3821         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3822         return -EIO;
3823 }
3824
3825 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3826 {
3827         __be32 *p;
3828         int status;
3829
3830         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3831         if (status != -EIO)
3832                 nfs_increment_open_seqid(status, res->seqid);
3833         if (status)
3834                 return status;
3835         READ_BUF(NFS4_STATEID_SIZE);
3836         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3837         return 0;
3838 }
3839
3840 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3841 {
3842         __be32 *p;
3843         int status;
3844
3845         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3846         if (status != -EIO)
3847                 nfs_increment_open_seqid(status, res->seqid);
3848         if (status)
3849                 return status;
3850         READ_BUF(NFS4_STATEID_SIZE);
3851         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3852         return 0;
3853 }
3854
3855 static int decode_putfh(struct xdr_stream *xdr)
3856 {
3857         return decode_op_hdr(xdr, OP_PUTFH);
3858 }
3859
3860 static int decode_putrootfh(struct xdr_stream *xdr)
3861 {
3862         return decode_op_hdr(xdr, OP_PUTROOTFH);
3863 }
3864
3865 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3866 {
3867         struct kvec *iov = req->rq_rcv_buf.head;
3868         __be32 *p;
3869         uint32_t count, eof, recvd, hdrlen;
3870         int status;
3871
3872         status = decode_op_hdr(xdr, OP_READ);
3873         if (status)
3874                 return status;
3875         READ_BUF(8);
3876         READ32(eof);
3877         READ32(count);
3878         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3879         recvd = req->rq_rcv_buf.len - hdrlen;
3880         if (count > recvd) {
3881                 dprintk("NFS: server cheating in read reply: "
3882                                 "count %u > recvd %u\n", count, recvd);
3883                 count = recvd;
3884                 eof = 0;
3885         }
3886         xdr_read_pages(xdr, count);
3887         res->eof = eof;
3888         res->count = count;
3889         return 0;
3890 }
3891
3892 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3893 {
3894         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3895         struct page     *page = *rcvbuf->pages;
3896         struct kvec     *iov = rcvbuf->head;
3897         size_t          hdrlen;
3898         u32             recvd, pglen = rcvbuf->page_len;
3899         __be32          *end, *entry, *p, *kaddr;
3900         unsigned int    nr = 0;
3901         int             status;
3902
3903         status = decode_op_hdr(xdr, OP_READDIR);
3904         if (status)
3905                 return status;
3906         READ_BUF(8);
3907         COPYMEM(readdir->verifier.data, 8);
3908         dprintk("%s: verifier = %08x:%08x\n",
3909                         __func__,
3910                         ((u32 *)readdir->verifier.data)[0],
3911                         ((u32 *)readdir->verifier.data)[1]);
3912
3913
3914         hdrlen = (char *) p - (char *) iov->iov_base;
3915         recvd = rcvbuf->len - hdrlen;
3916         if (pglen > recvd)
3917                 pglen = recvd;
3918         xdr_read_pages(xdr, pglen);
3919
3920         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3921         kaddr = p = kmap_atomic(page, KM_USER0);
3922         end = p + ((pglen + readdir->pgbase) >> 2);
3923         entry = p;
3924
3925         /* Make sure the packet actually has a value_follows and EOF entry */
3926         if ((entry + 1) > end)
3927                 goto short_pkt;
3928
3929         for (; *p++; nr++) {
3930                 u32 len, attrlen, xlen;
3931                 if (end - p < 3)
3932                         goto short_pkt;
3933                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3934                 p += 2;                 /* cookie */
3935                 len = ntohl(*p++);      /* filename length */
3936                 if (len > NFS4_MAXNAMLEN) {
3937                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3938                                         len);
3939                         goto err_unmap;
3940                 }
3941                 xlen = XDR_QUADLEN(len);
3942                 if (end - p < xlen + 1)
3943                         goto short_pkt;
3944                 dprintk("filename = %*s\n", len, (char *)p);
3945                 p += xlen;
3946                 len = ntohl(*p++);      /* bitmap length */
3947                 if (end - p < len + 1)
3948                         goto short_pkt;
3949                 p += len;
3950                 attrlen = XDR_QUADLEN(ntohl(*p++));
3951                 if (end - p < attrlen + 2)
3952                         goto short_pkt;
3953                 p += attrlen;           /* attributes */
3954                 entry = p;
3955         }
3956         /*
3957          * Apparently some server sends responses that are a valid size, but
3958          * contain no entries, and have value_follows==0 and EOF==0. For
3959          * those, just set the EOF marker.
3960          */
3961         if (!nr && entry[1] == 0) {
3962                 dprintk("NFS: readdir reply truncated!\n");
3963                 entry[1] = 1;
3964         }
3965 out:
3966         kunmap_atomic(kaddr, KM_USER0);
3967         return 0;
3968 short_pkt:
3969         /*
3970          * When we get a short packet there are 2 possibilities. We can
3971          * return an error, or fix up the response to look like a valid
3972          * response and return what we have so far. If there are no
3973          * entries and the packet was short, then return -EIO. If there
3974          * are valid entries in the response, return them and pretend that
3975          * the call was successful, but incomplete. The caller can retry the
3976          * readdir starting at the last cookie.
3977          */
3978         dprintk("%s: short packet at entry %d\n", __func__, nr);
3979         entry[0] = entry[1] = 0;
3980         if (nr)
3981                 goto out;
3982 err_unmap:
3983         kunmap_atomic(kaddr, KM_USER0);
3984         return -errno_NFSERR_IO;
3985 }
3986
3987 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3988 {
3989         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3990         struct kvec *iov = rcvbuf->head;
3991         size_t hdrlen;
3992         u32 len, recvd;
3993         __be32 *p;
3994         char *kaddr;
3995         int status;
3996
3997         status = decode_op_hdr(xdr, OP_READLINK);
3998         if (status)
3999                 return status;
4000
4001         /* Convert length of symlink */
4002         READ_BUF(4);
4003         READ32(len);
4004         if (len >= rcvbuf->page_len || len <= 0) {
4005                 dprintk("nfs: server returned giant symlink!\n");
4006                 return -ENAMETOOLONG;
4007         }
4008         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4009         recvd = req->rq_rcv_buf.len - hdrlen;
4010         if (recvd < len) {
4011                 dprintk("NFS: server cheating in readlink reply: "
4012                                 "count %u > recvd %u\n", len, recvd);
4013                 return -EIO;
4014         }
4015         xdr_read_pages(xdr, len);
4016         /*
4017          * The XDR encode routine has set things up so that
4018          * the link text will be copied directly into the
4019          * buffer.  We just have to do overflow-checking,
4020          * and and null-terminate the text (the VFS expects
4021          * null-termination).
4022          */
4023         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4024         kaddr[len+rcvbuf->page_base] = '\0';
4025         kunmap_atomic(kaddr, KM_USER0);
4026         return 0;
4027 }
4028
4029 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4030 {
4031         int status;
4032
4033         status = decode_op_hdr(xdr, OP_REMOVE);
4034         if (status)
4035                 goto out;
4036         status = decode_change_info(xdr, cinfo);
4037 out:
4038         return status;
4039 }
4040
4041 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4042               struct nfs4_change_info *new_cinfo)
4043 {
4044         int status;
4045
4046         status = decode_op_hdr(xdr, OP_RENAME);
4047         if (status)
4048                 goto out;
4049         if ((status = decode_change_info(xdr, old_cinfo)))
4050                 goto out;
4051         status = decode_change_info(xdr, new_cinfo);
4052 out:
4053         return status;
4054 }
4055
4056 static int decode_renew(struct xdr_stream *xdr)
4057 {
4058         return decode_op_hdr(xdr, OP_RENEW);
4059 }
4060
4061 static int
4062 decode_restorefh(struct xdr_stream *xdr)
4063 {
4064         return decode_op_hdr(xdr, OP_RESTOREFH);
4065 }
4066
4067 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4068                 size_t *acl_len)
4069 {
4070         __be32 *savep;
4071         uint32_t attrlen,
4072                  bitmap[2] = {0};
4073         struct kvec *iov = req->rq_rcv_buf.head;
4074         int status;
4075
4076         *acl_len = 0;
4077         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4078                 goto out;
4079         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4080                 goto out;
4081         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4082                 goto out;
4083
4084         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4085                 return -EIO;
4086         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4087                 size_t hdrlen;
4088                 u32 recvd;
4089
4090                 /* We ignore &savep and don't do consistency checks on
4091                  * the attr length.  Let userspace figure it out.... */
4092                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4093                 recvd = req->rq_rcv_buf.len - hdrlen;
4094                 if (attrlen > recvd) {
4095                         dprintk("NFS: server cheating in getattr"
4096                                         " acl reply: attrlen %u > recvd %u\n",
4097                                         attrlen, recvd);
4098                         return -EINVAL;
4099                 }
4100                 xdr_read_pages(xdr, attrlen);
4101                 *acl_len = attrlen;
4102         } else
4103                 status = -EOPNOTSUPP;
4104
4105 out:
4106         return status;
4107 }
4108
4109 static int
4110 decode_savefh(struct xdr_stream *xdr)
4111 {
4112         return decode_op_hdr(xdr, OP_SAVEFH);
4113 }
4114
4115 static int decode_setattr(struct xdr_stream *xdr)
4116 {
4117         __be32 *p;
4118         uint32_t bmlen;
4119         int status;
4120
4121         status = decode_op_hdr(xdr, OP_SETATTR);
4122         if (status)
4123                 return status;
4124         READ_BUF(4);
4125         READ32(bmlen);
4126         READ_BUF(bmlen << 2);
4127         return 0;
4128 }
4129
4130 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4131 {
4132         __be32 *p;
4133         uint32_t opnum;
4134         int32_t nfserr;
4135
4136         READ_BUF(8);
4137         READ32(opnum);
4138         if (opnum != OP_SETCLIENTID) {
4139                 dprintk("nfs: decode_setclientid: Server returned operation"
4140                         " %d\n", opnum);
4141                 return -EIO;
4142         }
4143         READ32(nfserr);
4144         if (nfserr == NFS_OK) {
4145                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4146                 READ64(clp->cl_clientid);
4147                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4148         } else if (nfserr == NFSERR_CLID_INUSE) {
4149                 uint32_t len;
4150
4151                 /* skip netid string */
4152                 READ_BUF(4);
4153                 READ32(len);
4154                 READ_BUF(len);
4155
4156                 /* skip uaddr string */
4157                 READ_BUF(4);
4158                 READ32(len);
4159                 READ_BUF(len);
4160                 return -NFSERR_CLID_INUSE;
4161         } else
4162                 return nfs4_stat_to_errno(nfserr);
4163
4164         return 0;
4165 }
4166
4167 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4168 {
4169         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4170 }
4171
4172 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4173 {
4174         __be32 *p;
4175         int status;
4176
4177         status = decode_op_hdr(xdr, OP_WRITE);
4178         if (status)
4179                 return status;
4180
4181         READ_BUF(16);
4182         READ32(res->count);
4183         READ32(res->verf->committed);
4184         COPYMEM(res->verf->verifier, 8);
4185         return 0;
4186 }
4187
4188 static int decode_delegreturn(struct xdr_stream *xdr)
4189 {
4190         return decode_op_hdr(xdr, OP_DELEGRETURN);
4191 }
4192
4193 #if defined(CONFIG_NFS_V4_1)
4194 static int decode_exchange_id(struct xdr_stream *xdr,
4195                               struct nfs41_exchange_id_res *res)
4196 {
4197         __be32 *p;
4198         uint32_t dummy;
4199         int status;
4200         struct nfs_client *clp = res->client;
4201
4202         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4203         if (status)
4204                 return status;
4205
4206         READ_BUF(8);
4207         READ64(clp->cl_ex_clid);
4208         READ_BUF(12);
4209         READ32(clp->cl_seqid);
4210         READ32(clp->cl_exchange_flags);
4211
4212         /* We ask for SP4_NONE */
4213         READ32(dummy);
4214         if (dummy != SP4_NONE)
4215                 return -EIO;
4216
4217         /* Throw away minor_id */
4218         READ_BUF(8);
4219
4220         /* Throw away Major id */
4221         READ_BUF(4);
4222         READ32(dummy);
4223         READ_BUF(dummy);
4224
4225         /* Throw away server_scope */
4226         READ_BUF(4);
4227         READ32(dummy);
4228         READ_BUF(dummy);
4229
4230         /* Throw away Implementation id array */
4231         READ_BUF(4);
4232         READ32(dummy);
4233         READ_BUF(dummy);
4234
4235         return 0;
4236 }
4237
4238 static int decode_chan_attrs(struct xdr_stream *xdr,
4239                              struct nfs4_channel_attrs *attrs)
4240 {
4241         __be32 *p;
4242         u32 nr_attrs;
4243
4244         READ_BUF(28);
4245         READ32(attrs->headerpadsz);
4246         READ32(attrs->max_rqst_sz);
4247         READ32(attrs->max_resp_sz);
4248         READ32(attrs->max_resp_sz_cached);
4249         READ32(attrs->max_ops);
4250         READ32(attrs->max_reqs);
4251         READ32(nr_attrs);
4252         if (unlikely(nr_attrs > 1)) {
4253                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4254                         __func__, nr_attrs);
4255                 return -EINVAL;
4256         }
4257         if (nr_attrs == 1)
4258                 READ_BUF(4); /* skip rdma_attrs */
4259         return 0;
4260 }
4261
4262 static int decode_create_session(struct xdr_stream *xdr,
4263                                  struct nfs41_create_session_res *res)
4264 {
4265         __be32 *p;
4266         int status;
4267         struct nfs_client *clp = res->client;
4268         struct nfs4_session *session = clp->cl_session;
4269
4270         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4271
4272         if (status)
4273                 return status;
4274
4275         /* sessionid */
4276         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4277         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4278
4279         /* seqid, flags */
4280         READ_BUF(8);
4281         READ32(clp->cl_seqid);
4282         READ32(session->flags);
4283
4284         /* Channel attributes */
4285         status = decode_chan_attrs(xdr, &session->fc_attrs);
4286         if (!status)
4287                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4288         return status;
4289 }
4290
4291 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4292 {
4293         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4294 }
4295 #endif /* CONFIG_NFS_V4_1 */
4296
4297 static int decode_sequence(struct xdr_stream *xdr,
4298                            struct nfs4_sequence_res *res,
4299                            struct rpc_rqst *rqstp)
4300 {
4301 #if defined(CONFIG_NFS_V4_1)
4302         struct nfs4_slot *slot;
4303         struct nfs4_sessionid id;
4304         u32 dummy;
4305         int status;
4306         __be32 *p;
4307
4308         if (!res->sr_session)
4309                 return 0;
4310
4311         status = decode_op_hdr(xdr, OP_SEQUENCE);
4312         if (status)
4313                 goto out_err;
4314
4315         /*
4316          * If the server returns different values for sessionID, slotID or
4317          * sequence number, the server is looney tunes.
4318          */
4319         status = -ESERVERFAULT;
4320
4321         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4322         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4323         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4324         if (memcmp(id.data, res->sr_session->sess_id.data,
4325                    NFS4_MAX_SESSIONID_LEN)) {
4326                 dprintk("%s Invalid session id\n", __func__);
4327                 goto out_err;
4328         }
4329         /* seqid */
4330         READ32(dummy);
4331         if (dummy != slot->seq_nr) {
4332                 dprintk("%s Invalid sequence number\n", __func__);
4333                 goto out_err;
4334         }
4335         /* slot id */
4336         READ32(dummy);
4337         if (dummy != res->sr_slotid) {
4338                 dprintk("%s Invalid slot id\n", __func__);
4339                 goto out_err;
4340         }
4341         /* highest slot id - currently not processed */
4342         READ32(dummy);
4343         /* target highest slot id - currently not processed */
4344         READ32(dummy);
4345         /* result flags - currently not processed */
4346         READ32(dummy);
4347         status = 0;
4348 out_err:
4349         res->sr_status = status;
4350         return status;
4351 #else  /* CONFIG_NFS_V4_1 */
4352         return 0;
4353 #endif /* CONFIG_NFS_V4_1 */
4354 }
4355
4356 /*
4357  * END OF "GENERIC" DECODE ROUTINES.
4358  */
4359
4360 /*
4361  * Decode OPEN_DOWNGRADE response
4362  */
4363 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4364 {
4365         struct xdr_stream xdr;
4366         struct compound_hdr hdr;
4367         int status;
4368
4369         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4370         status = decode_compound_hdr(&xdr, &hdr);
4371         if (status)
4372                 goto out;
4373         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4374         if (status)
4375                 goto out;
4376         status = decode_putfh(&xdr);
4377         if (status)
4378                 goto out;
4379         status = decode_open_downgrade(&xdr, res);
4380         if (status != 0)
4381                 goto out;
4382         decode_getfattr(&xdr, res->fattr, res->server,
4383                         !RPC_IS_ASYNC(rqstp->rq_task));
4384 out:
4385         return status;
4386 }
4387
4388 /*
4389  * Decode ACCESS response
4390  */
4391 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4392 {
4393         struct xdr_stream xdr;
4394         struct compound_hdr hdr;
4395         int status;
4396
4397         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4398         status = decode_compound_hdr(&xdr, &hdr);
4399         if (status)
4400                 goto out;
4401         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4402         if (status)
4403                 goto out;
4404         status = decode_putfh(&xdr);
4405         if (status != 0)
4406                 goto out;
4407         status = decode_access(&xdr, res);
4408         if (status != 0)
4409                 goto out;
4410         decode_getfattr(&xdr, res->fattr, res->server,
4411                         !RPC_IS_ASYNC(rqstp->rq_task));
4412 out:
4413         return status;
4414 }
4415
4416 /*
4417  * Decode LOOKUP response
4418  */
4419 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4420 {
4421         struct xdr_stream xdr;
4422         struct compound_hdr hdr;
4423         int status;
4424
4425         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4426         status = decode_compound_hdr(&xdr, &hdr);
4427         if (status)
4428                 goto out;
4429         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4430         if (status)
4431                 goto out;
4432         if ((status = decode_putfh(&xdr)) != 0)
4433                 goto out;
4434         if ((status = decode_lookup(&xdr)) != 0)
4435                 goto out;
4436         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4437                 goto out;
4438         status = decode_getfattr(&xdr, res->fattr, res->server
4439                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4440 out:
4441         return status;
4442 }
4443
4444 /*
4445  * Decode LOOKUP_ROOT response
4446  */
4447 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4448 {
4449         struct xdr_stream xdr;
4450         struct compound_hdr hdr;
4451         int status;
4452
4453         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4454         status = decode_compound_hdr(&xdr, &hdr);
4455         if (status)
4456                 goto out;
4457         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4458         if (status)
4459                 goto out;
4460         if ((status = decode_putrootfh(&xdr)) != 0)
4461                 goto out;
4462         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4463                 status = decode_getfattr(&xdr, res->fattr, res->server,
4464                                 !RPC_IS_ASYNC(rqstp->rq_task));
4465 out:
4466         return status;
4467 }
4468
4469 /*
4470  * Decode REMOVE response
4471  */
4472 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4473 {
4474         struct xdr_stream xdr;
4475         struct compound_hdr hdr;
4476         int status;
4477
4478         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4479         status = decode_compound_hdr(&xdr, &hdr);
4480         if (status)
4481                 goto out;
4482         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4483         if (status)
4484                 goto out;
4485         if ((status = decode_putfh(&xdr)) != 0)
4486                 goto out;
4487         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4488                 goto out;
4489         decode_getfattr(&xdr, &res->dir_attr, res->server,
4490                         !RPC_IS_ASYNC(rqstp->rq_task));
4491 out:
4492         return status;
4493 }
4494
4495 /*
4496  * Decode RENAME response
4497  */
4498 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4499 {
4500         struct xdr_stream xdr;
4501         struct compound_hdr hdr;
4502         int status;
4503
4504         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4505         status = decode_compound_hdr(&xdr, &hdr);
4506         if (status)
4507                 goto out;
4508         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4509         if (status)
4510                 goto out;
4511         if ((status = decode_putfh(&xdr)) != 0)
4512                 goto out;
4513         if ((status = decode_savefh(&xdr)) != 0)
4514                 goto out;
4515         if ((status = decode_putfh(&xdr)) != 0)
4516                 goto out;
4517         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4518                 goto out;
4519         /* Current FH is target directory */
4520         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4521                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4522                 goto out;
4523         if ((status = decode_restorefh(&xdr)) != 0)
4524                 goto out;
4525         decode_getfattr(&xdr, res->old_fattr, res->server,
4526                         !RPC_IS_ASYNC(rqstp->rq_task));
4527 out:
4528         return status;
4529 }
4530
4531 /*
4532  * Decode LINK response
4533  */
4534 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4535 {
4536         struct xdr_stream xdr;
4537         struct compound_hdr hdr;
4538         int status;
4539
4540         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4541         status = decode_compound_hdr(&xdr, &hdr);
4542         if (status)
4543                 goto out;
4544         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4545         if (status)
4546                 goto out;
4547         if ((status = decode_putfh(&xdr)) != 0)
4548                 goto out;
4549         if ((status = decode_savefh(&xdr)) != 0)
4550                 goto out;
4551         if ((status = decode_putfh(&xdr)) != 0)
4552                 goto out;
4553         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4554                 goto out;
4555         /*
4556          * Note order: OP_LINK leaves the directory as the current
4557          *             filehandle.
4558          */
4559         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4560                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4561                 goto out;
4562         if ((status = decode_restorefh(&xdr)) != 0)
4563                 goto out;
4564         decode_getfattr(&xdr, res->fattr, res->server,
4565                         !RPC_IS_ASYNC(rqstp->rq_task));
4566 out:
4567         return status;
4568 }
4569
4570 /*
4571  * Decode CREATE response
4572  */
4573 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4574 {
4575         struct xdr_stream xdr;
4576         struct compound_hdr hdr;
4577         int status;
4578
4579         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4580         status = decode_compound_hdr(&xdr, &hdr);
4581         if (status)
4582                 goto out;
4583         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4584         if (status)
4585                 goto out;
4586         if ((status = decode_putfh(&xdr)) != 0)
4587                 goto out;
4588         if ((status = decode_savefh(&xdr)) != 0)
4589                 goto out;
4590         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4591                 goto out;
4592         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4593                 goto out;
4594         if (decode_getfattr(&xdr, res->fattr, res->server,
4595                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4596                 goto out;
4597         if ((status = decode_restorefh(&xdr)) != 0)
4598                 goto out;
4599         decode_getfattr(&xdr, res->dir_fattr, res->server,
4600                         !RPC_IS_ASYNC(rqstp->rq_task));
4601 out:
4602         return status;
4603 }
4604
4605 /*
4606  * Decode SYMLINK response
4607  */
4608 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4609 {
4610         return nfs4_xdr_dec_create(rqstp, p, res);
4611 }
4612
4613 /*
4614  * Decode GETATTR response
4615  */
4616 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4617 {
4618         struct xdr_stream xdr;
4619         struct compound_hdr hdr;
4620         int status;
4621
4622         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4623         status = decode_compound_hdr(&xdr, &hdr);
4624         if (status)
4625                 goto out;
4626         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4627         if (status)
4628                 goto out;
4629         status = decode_putfh(&xdr);
4630         if (status)
4631                 goto out;
4632         status = decode_getfattr(&xdr, res->fattr, res->server,
4633                         !RPC_IS_ASYNC(rqstp->rq_task));
4634 out:
4635         return status;
4636 }
4637
4638 /*
4639  * Encode an SETACL request
4640  */
4641 static int
4642 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4643 {
4644         struct xdr_stream xdr;
4645         struct compound_hdr hdr = {
4646                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4647         };
4648         int status;
4649
4650         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4651         encode_compound_hdr(&xdr, req, &hdr);
4652         encode_sequence(&xdr, &args->seq_args, &hdr);
4653         encode_putfh(&xdr, args->fh, &hdr);
4654         status = encode_setacl(&xdr, args, &hdr);
4655         encode_nops(&hdr);
4656         return status;
4657 }
4658
4659 /*
4660  * Decode SETACL response
4661  */
4662 static int
4663 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4664                     struct nfs_setaclres *res)
4665 {
4666         struct xdr_stream xdr;
4667         struct compound_hdr hdr;
4668         int status;
4669
4670         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4671         status = decode_compound_hdr(&xdr, &hdr);
4672         if (status)
4673                 goto out;
4674         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4675         if (status)
4676                 goto out;
4677         status = decode_putfh(&xdr);
4678         if (status)
4679                 goto out;
4680         status = decode_setattr(&xdr);
4681 out:
4682         return status;
4683 }
4684
4685 /*
4686  * Decode GETACL response
4687  */
4688 static int
4689 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4690                     struct nfs_getaclres *res)
4691 {
4692         struct xdr_stream xdr;
4693         struct compound_hdr hdr;
4694         int status;
4695
4696         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4697         status = decode_compound_hdr(&xdr, &hdr);
4698         if (status)
4699                 goto out;
4700         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4701         if (status)
4702                 goto out;
4703         status = decode_putfh(&xdr);
4704         if (status)
4705                 goto out;
4706         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4707
4708 out:
4709         return status;
4710 }
4711
4712 /*
4713  * Decode CLOSE response
4714  */
4715 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4716 {
4717         struct xdr_stream xdr;
4718         struct compound_hdr hdr;
4719         int status;
4720
4721         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4722         status = decode_compound_hdr(&xdr, &hdr);
4723         if (status)
4724                 goto out;
4725         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4726         if (status)
4727                 goto out;
4728         status = decode_putfh(&xdr);
4729         if (status)
4730                 goto out;
4731         status = decode_close(&xdr, res);
4732         if (status != 0)
4733                 goto out;
4734         /*
4735          * Note: Server may do delete on close for this file
4736          *      in which case the getattr call will fail with
4737          *      an ESTALE error. Shouldn't be a problem,
4738          *      though, since fattr->valid will remain unset.
4739          */
4740         decode_getfattr(&xdr, res->fattr, res->server,
4741                         !RPC_IS_ASYNC(rqstp->rq_task));
4742 out:
4743         return status;
4744 }
4745
4746 /*
4747  * Decode OPEN response
4748  */
4749 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4750 {
4751         struct xdr_stream xdr;
4752         struct compound_hdr hdr;
4753         int status;
4754
4755         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4756         status = decode_compound_hdr(&xdr, &hdr);
4757         if (status)
4758                 goto out;
4759         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4760         if (status)
4761                 goto out;
4762         status = decode_putfh(&xdr);
4763         if (status)
4764                 goto out;
4765         status = decode_savefh(&xdr);
4766         if (status)
4767                 goto out;
4768         status = decode_open(&xdr, res);
4769         if (status)
4770                 goto out;
4771         if (decode_getfh(&xdr, &res->fh) != 0)
4772                 goto out;
4773         if (decode_getfattr(&xdr, res->f_attr, res->server,
4774                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4775                 goto out;
4776         if (decode_restorefh(&xdr) != 0)
4777                 goto out;
4778         decode_getfattr(&xdr, res->dir_attr, res->server,
4779                         !RPC_IS_ASYNC(rqstp->rq_task));
4780 out:
4781         return status;
4782 }
4783
4784 /*
4785  * Decode OPEN_CONFIRM response
4786  */
4787 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4788 {
4789         struct xdr_stream xdr;
4790         struct compound_hdr hdr;
4791         int status;
4792
4793         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4794         status = decode_compound_hdr(&xdr, &hdr);
4795         if (status)
4796                 goto out;
4797         status = decode_putfh(&xdr);
4798         if (status)
4799                 goto out;
4800         status = decode_open_confirm(&xdr, res);
4801 out:
4802         return status;
4803 }
4804
4805 /*
4806  * Decode OPEN response
4807  */
4808 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4809 {
4810         struct xdr_stream xdr;
4811         struct compound_hdr hdr;
4812         int status;
4813
4814         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4815         status = decode_compound_hdr(&xdr, &hdr);
4816         if (status)
4817                 goto out;
4818         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4819         if (status)
4820                 goto out;
4821         status = decode_putfh(&xdr);
4822         if (status)
4823                 goto out;
4824         status = decode_open(&xdr, res);
4825         if (status)
4826                 goto out;
4827         decode_getfattr(&xdr, res->f_attr, res->server,
4828                         !RPC_IS_ASYNC(rqstp->rq_task));
4829 out:
4830         return status;
4831 }
4832
4833 /*
4834  * Decode SETATTR response
4835  */
4836 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4837 {
4838         struct xdr_stream xdr;
4839         struct compound_hdr hdr;
4840         int status;
4841
4842         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4843         status = decode_compound_hdr(&xdr, &hdr);
4844         if (status)
4845                 goto out;
4846         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4847         if (status)
4848                 goto out;
4849         status = decode_putfh(&xdr);
4850         if (status)
4851                 goto out;
4852         status = decode_setattr(&xdr);
4853         if (status)
4854                 goto out;
4855         decode_getfattr(&xdr, res->fattr, res->server,
4856                         !RPC_IS_ASYNC(rqstp->rq_task));
4857 out:
4858         return status;
4859 }
4860
4861 /*
4862  * Decode LOCK response
4863  */
4864 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4865 {
4866         struct xdr_stream xdr;
4867         struct compound_hdr hdr;
4868         int status;
4869
4870         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4871         status = decode_compound_hdr(&xdr, &hdr);
4872         if (status)
4873                 goto out;
4874         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4875         if (status)
4876                 goto out;
4877         status = decode_putfh(&xdr);
4878         if (status)
4879                 goto out;
4880         status = decode_lock(&xdr, res);
4881 out:
4882         return status;
4883 }
4884
4885 /*
4886  * Decode LOCKT response
4887  */
4888 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4889 {
4890         struct xdr_stream xdr;
4891         struct compound_hdr hdr;
4892         int status;
4893
4894         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4895         status = decode_compound_hdr(&xdr, &hdr);
4896         if (status)
4897                 goto out;
4898         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4899         if (status)
4900                 goto out;
4901         status = decode_putfh(&xdr);
4902         if (status)
4903                 goto out;
4904         status = decode_lockt(&xdr, res);
4905 out:
4906         return status;
4907 }
4908
4909 /*
4910  * Decode LOCKU response
4911  */
4912 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4913 {
4914         struct xdr_stream xdr;
4915         struct compound_hdr hdr;
4916         int status;
4917
4918         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4919         status = decode_compound_hdr(&xdr, &hdr);
4920         if (status)
4921                 goto out;
4922         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4923         if (status)
4924                 goto out;
4925         status = decode_putfh(&xdr);
4926         if (status)
4927                 goto out;
4928         status = decode_locku(&xdr, res);
4929 out:
4930         return status;
4931 }
4932
4933 /*
4934  * Decode READLINK response
4935  */
4936 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4937                                  struct nfs4_readlink_res *res)
4938 {
4939         struct xdr_stream xdr;
4940         struct compound_hdr hdr;
4941         int status;
4942
4943         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4944         status = decode_compound_hdr(&xdr, &hdr);
4945         if (status)
4946                 goto out;
4947         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4948         if (status)
4949                 goto out;
4950         status = decode_putfh(&xdr);
4951         if (status)
4952                 goto out;
4953         status = decode_readlink(&xdr, rqstp);
4954 out:
4955         return status;
4956 }
4957
4958 /*
4959  * Decode READDIR response
4960  */
4961 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4962 {
4963         struct xdr_stream xdr;
4964         struct compound_hdr hdr;
4965         int status;
4966
4967         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4968         status = decode_compound_hdr(&xdr, &hdr);
4969         if (status)
4970                 goto out;
4971         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4972         if (status)
4973                 goto out;
4974         status = decode_putfh(&xdr);
4975         if (status)
4976                 goto out;
4977         status = decode_readdir(&xdr, rqstp, res);
4978 out:
4979         return status;
4980 }
4981
4982 /*
4983  * Decode Read response
4984  */
4985 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4986 {
4987         struct xdr_stream xdr;
4988         struct compound_hdr hdr;
4989         int status;
4990
4991         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4992         status = decode_compound_hdr(&xdr, &hdr);
4993         if (status)
4994                 goto out;
4995         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4996         if (status)
4997                 goto out;
4998         status = decode_putfh(&xdr);
4999         if (status)
5000                 goto out;
5001         status = decode_read(&xdr, rqstp, res);
5002         if (!status)
5003                 status = res->count;
5004 out:
5005         return status;
5006 }
5007
5008 /*
5009  * Decode WRITE response
5010  */
5011 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5012 {
5013         struct xdr_stream xdr;
5014         struct compound_hdr hdr;
5015         int status;
5016
5017         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5018         status = decode_compound_hdr(&xdr, &hdr);
5019         if (status)
5020                 goto out;
5021         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5022         if (status)
5023                 goto out;
5024         status = decode_putfh(&xdr);
5025         if (status)
5026                 goto out;
5027         status = decode_write(&xdr, res);
5028         if (status)
5029                 goto out;
5030         decode_getfattr(&xdr, res->fattr, res->server,
5031                         !RPC_IS_ASYNC(rqstp->rq_task));
5032         if (!status)
5033                 status = res->count;
5034 out:
5035         return status;
5036 }
5037
5038 /*
5039  * Decode COMMIT response
5040  */
5041 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5042 {
5043         struct xdr_stream xdr;
5044         struct compound_hdr hdr;
5045         int status;
5046
5047         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5048         status = decode_compound_hdr(&xdr, &hdr);
5049         if (status)
5050                 goto out;
5051         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5052         if (status)
5053                 goto out;
5054         status = decode_putfh(&xdr);
5055         if (status)
5056                 goto out;
5057         status = decode_commit(&xdr, res);
5058         if (status)
5059                 goto out;
5060         decode_getfattr(&xdr, res->fattr, res->server,
5061                         !RPC_IS_ASYNC(rqstp->rq_task));
5062 out:
5063         return status;
5064 }
5065
5066 /*
5067  * FSINFO request
5068  */
5069 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5070                                struct nfs4_fsinfo_res *res)
5071 {
5072         struct xdr_stream xdr;
5073         struct compound_hdr hdr;
5074         int status;
5075
5076         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5077         status = decode_compound_hdr(&xdr, &hdr);
5078         if (!status)
5079                 status = decode_sequence(&xdr, &res->seq_res, req);
5080         if (!status)
5081                 status = decode_putfh(&xdr);
5082         if (!status)
5083                 status = decode_fsinfo(&xdr, res->fsinfo);
5084         return status;
5085 }
5086
5087 /*
5088  * PATHCONF request
5089  */
5090 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5091                                  struct nfs4_pathconf_res *res)
5092 {
5093         struct xdr_stream xdr;
5094         struct compound_hdr hdr;
5095         int status;
5096
5097         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5098         status = decode_compound_hdr(&xdr, &hdr);
5099         if (!status)
5100                 status = decode_sequence(&xdr, &res->seq_res, req);
5101         if (!status)
5102                 status = decode_putfh(&xdr);
5103         if (!status)
5104                 status = decode_pathconf(&xdr, res->pathconf);
5105         return status;
5106 }
5107
5108 /*
5109  * STATFS request
5110  */
5111 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5112                                struct nfs4_statfs_res *res)
5113 {
5114         struct xdr_stream xdr;
5115         struct compound_hdr hdr;
5116         int status;
5117
5118         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5119         status = decode_compound_hdr(&xdr, &hdr);
5120         if (!status)
5121                 status = decode_sequence(&xdr, &res->seq_res, req);
5122         if (!status)
5123                 status = decode_putfh(&xdr);
5124         if (!status)
5125                 status = decode_statfs(&xdr, res->fsstat);
5126         return status;
5127 }
5128
5129 /*
5130  * GETATTR_BITMAP request
5131  */
5132 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5133 {
5134         struct xdr_stream xdr;
5135         struct compound_hdr hdr;
5136         int status;
5137
5138         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5139         status = decode_compound_hdr(&xdr, &hdr);
5140         if (status)
5141                 goto out;
5142         status = decode_sequence(&xdr, &res->seq_res, req);
5143         if (status)
5144                 goto out;
5145         if ((status = decode_putfh(&xdr)) != 0)
5146                 goto out;
5147         status = decode_server_caps(&xdr, res);
5148 out:
5149         return status;
5150 }
5151
5152 /*
5153  * Decode RENEW response
5154  */
5155 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5156 {
5157         struct xdr_stream xdr;
5158         struct compound_hdr hdr;
5159         int status;
5160
5161         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5162         status = decode_compound_hdr(&xdr, &hdr);
5163         if (!status)
5164                 status = decode_renew(&xdr);
5165         return status;
5166 }
5167
5168 /*
5169  * a SETCLIENTID request
5170  */
5171 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5172                 struct nfs_client *clp)
5173 {
5174         struct xdr_stream xdr;
5175         struct compound_hdr hdr;
5176         int status;
5177
5178         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5179         status = decode_compound_hdr(&xdr, &hdr);
5180         if (!status)
5181                 status = decode_setclientid(&xdr, clp);
5182         return status;
5183 }
5184
5185 /*
5186  * a SETCLIENTID_CONFIRM request
5187  */
5188 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5189 {
5190         struct xdr_stream xdr;
5191         struct compound_hdr hdr;
5192         int status;
5193
5194         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5195         status = decode_compound_hdr(&xdr, &hdr);
5196         if (!status)
5197                 status = decode_setclientid_confirm(&xdr);
5198         if (!status)
5199                 status = decode_putrootfh(&xdr);
5200         if (!status)
5201                 status = decode_fsinfo(&xdr, fsinfo);
5202         return status;
5203 }
5204
5205 /*
5206  * DELEGRETURN request
5207  */
5208 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5209 {
5210         struct xdr_stream xdr;
5211         struct compound_hdr hdr;
5212         int status;
5213
5214         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5215         status = decode_compound_hdr(&xdr, &hdr);
5216         if (status)
5217                 goto out;
5218         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5219         if (status)
5220                 goto out;
5221         status = decode_putfh(&xdr);
5222         if (status != 0)
5223                 goto out;
5224         status = decode_delegreturn(&xdr);
5225         decode_getfattr(&xdr, res->fattr, res->server,
5226                         !RPC_IS_ASYNC(rqstp->rq_task));
5227 out:
5228         return status;
5229 }
5230
5231 /*
5232  * FS_LOCATIONS request
5233  */
5234 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5235                                      struct nfs4_fs_locations_res *res)
5236 {
5237         struct xdr_stream xdr;
5238         struct compound_hdr hdr;
5239         int status;
5240
5241         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5242         status = decode_compound_hdr(&xdr, &hdr);
5243         if (status)
5244                 goto out;
5245         status = decode_sequence(&xdr, &res->seq_res, req);
5246         if (status)
5247                 goto out;
5248         if ((status = decode_putfh(&xdr)) != 0)
5249                 goto out;
5250         if ((status = decode_lookup(&xdr)) != 0)
5251                 goto out;
5252         xdr_enter_page(&xdr, PAGE_SIZE);
5253         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5254                                  res->fs_locations->server,
5255                                  !RPC_IS_ASYNC(req->rq_task));
5256 out:
5257         return status;
5258 }
5259
5260 #if defined(CONFIG_NFS_V4_1)
5261 /*
5262  * EXCHANGE_ID request
5263  */
5264 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5265                                     void *res)
5266 {
5267         struct xdr_stream xdr;
5268         struct compound_hdr hdr;
5269         int status;
5270
5271         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5272         status = decode_compound_hdr(&xdr, &hdr);
5273         if (!status)
5274                 status = decode_exchange_id(&xdr, res);
5275         return status;
5276 }
5277
5278 /*
5279  * a CREATE_SESSION request
5280  */
5281 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5282                                        struct nfs41_create_session_res *res)
5283 {
5284         struct xdr_stream xdr;
5285         struct compound_hdr hdr;
5286         int status;
5287
5288         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5289         status = decode_compound_hdr(&xdr, &hdr);
5290         if (!status)
5291                 status = decode_create_session(&xdr, res);
5292         return status;
5293 }
5294
5295 /*
5296  * a DESTROY_SESSION request
5297  */
5298 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5299                                         void *dummy)
5300 {
5301         struct xdr_stream xdr;
5302         struct compound_hdr hdr;
5303         int status;
5304
5305         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5306         status = decode_compound_hdr(&xdr, &hdr);
5307         if (!status)
5308                 status = decode_destroy_session(&xdr, dummy);
5309         return status;
5310 }
5311
5312 /*
5313  * a SEQUENCE request
5314  */
5315 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5316                                  struct nfs4_sequence_res *res)
5317 {
5318         struct xdr_stream xdr;
5319         struct compound_hdr hdr;
5320         int status;
5321
5322         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5323         status = decode_compound_hdr(&xdr, &hdr);
5324         if (!status)
5325                 status = decode_sequence(&xdr, res, rqstp);
5326         return status;
5327 }
5328
5329 /*
5330  * a GET_LEASE_TIME request
5331  */
5332 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5333                                        struct nfs4_get_lease_time_res *res)
5334 {
5335         struct xdr_stream xdr;
5336         struct compound_hdr hdr;
5337         int status;
5338
5339         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5340         status = decode_compound_hdr(&xdr, &hdr);
5341         if (!status)
5342                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5343         if (!status)
5344                 status = decode_putrootfh(&xdr);
5345         if (!status)
5346                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5347         return status;
5348 }
5349 #endif /* CONFIG_NFS_V4_1 */
5350
5351 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5352 {
5353         uint32_t bitmap[2] = {0};
5354         uint32_t len;
5355
5356         if (!*p++) {
5357                 if (!*p)
5358                         return ERR_PTR(-EAGAIN);
5359                 entry->eof = 1;
5360                 return ERR_PTR(-EBADCOOKIE);
5361         }
5362
5363         entry->prev_cookie = entry->cookie;
5364         p = xdr_decode_hyper(p, &entry->cookie);
5365         entry->len = ntohl(*p++);
5366         entry->name = (const char *) p;
5367         p += XDR_QUADLEN(entry->len);
5368
5369         /*
5370          * In case the server doesn't return an inode number,
5371          * we fake one here.  (We don't use inode number 0,
5372          * since glibc seems to choke on it...)
5373          */
5374         entry->ino = 1;
5375
5376         len = ntohl(*p++);              /* bitmap length */
5377         if (len-- > 0) {
5378                 bitmap[0] = ntohl(*p++);
5379                 if (len-- > 0) {
5380                         bitmap[1] = ntohl(*p++);
5381                         p += len;
5382                 }
5383         }
5384         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5385         if (len > 0) {
5386                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5387                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5388                         /* Ignore the return value of rdattr_error for now */
5389                         p++;
5390                         len--;
5391                 }
5392                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5393                         xdr_decode_hyper(p, &entry->ino);
5394                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5395                         xdr_decode_hyper(p, &entry->ino);
5396                 p += len;
5397         }
5398
5399         entry->eof = !p[0] && p[1];
5400         return p;
5401 }
5402
5403 /*
5404  * We need to translate between nfs status return values and
5405  * the local errno values which may not be the same.
5406  */
5407 static struct {
5408         int stat;
5409         int errno;
5410 } nfs_errtbl[] = {
5411         { NFS4_OK,              0               },
5412         { NFS4ERR_PERM,         -EPERM          },
5413         { NFS4ERR_NOENT,        -ENOENT         },
5414         { NFS4ERR_IO,           -errno_NFSERR_IO},
5415         { NFS4ERR_NXIO,         -ENXIO          },
5416         { NFS4ERR_ACCESS,       -EACCES         },
5417         { NFS4ERR_EXIST,        -EEXIST         },
5418         { NFS4ERR_XDEV,         -EXDEV          },
5419         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5420         { NFS4ERR_ISDIR,        -EISDIR         },
5421         { NFS4ERR_INVAL,        -EINVAL         },
5422         { NFS4ERR_FBIG,         -EFBIG          },
5423         { NFS4ERR_NOSPC,        -ENOSPC         },
5424         { NFS4ERR_ROFS,         -EROFS          },
5425         { NFS4ERR_MLINK,        -EMLINK         },
5426         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5427         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5428         { NFS4ERR_DQUOT,        -EDQUOT         },
5429         { NFS4ERR_STALE,        -ESTALE         },
5430         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5431         { NFS4ERR_BADOWNER,     -EINVAL         },
5432         { NFS4ERR_BADNAME,      -EINVAL         },
5433         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5434         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5435         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5436         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5437         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5438         { NFS4ERR_LOCKED,       -EAGAIN         },
5439         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5440         { NFS4ERR_SYMLINK,      -ELOOP          },
5441         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5442         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5443         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5444                                                     * to be handled by a
5445                                                     * middle-layer.
5446                                                     */
5447         { -1,                   -EIO            }
5448 };
5449
5450 /*
5451  * Convert an NFS error code to a local one.
5452  * This one is used jointly by NFSv2 and NFSv3.
5453  */
5454 static int
5455 nfs4_stat_to_errno(int stat)
5456 {
5457         int i;
5458         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5459                 if (nfs_errtbl[i].stat == stat)
5460                         return nfs_errtbl[i].errno;
5461         }
5462         if (stat <= 10000 || stat > 10100) {
5463                 /* The server is looney tunes. */
5464                 return -ESERVERFAULT;
5465         }
5466         /* If we cannot translate the error, the recovery routines should
5467          * handle it.
5468          * Note: remaining NFSv4 error codes have values > 10000, so should
5469          * not conflict with native Linux error codes.
5470          */
5471         return -stat;
5472 }
5473
5474 #define PROC(proc, argtype, restype)                            \
5475 [NFSPROC4_CLNT_##proc] = {                                      \
5476         .p_proc   = NFSPROC4_COMPOUND,                          \
5477         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5478         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5479         .p_arglen = NFS4_##argtype##_sz,                        \
5480         .p_replen = NFS4_##restype##_sz,                        \
5481         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5482         .p_name   = #proc,                                      \
5483 }
5484
5485 struct rpc_procinfo     nfs4_procedures[] = {
5486   PROC(READ,            enc_read,       dec_read),
5487   PROC(WRITE,           enc_write,      dec_write),
5488   PROC(COMMIT,          enc_commit,     dec_commit),
5489   PROC(OPEN,            enc_open,       dec_open),
5490   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5491   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5492   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5493   PROC(CLOSE,           enc_close,      dec_close),
5494   PROC(SETATTR,         enc_setattr,    dec_setattr),
5495   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5496   PROC(RENEW,           enc_renew,      dec_renew),
5497   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5498   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5499   PROC(LOCK,            enc_lock,       dec_lock),
5500   PROC(LOCKT,           enc_lockt,      dec_lockt),
5501   PROC(LOCKU,           enc_locku,      dec_locku),
5502   PROC(ACCESS,          enc_access,     dec_access),
5503   PROC(GETATTR,         enc_getattr,    dec_getattr),
5504   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5505   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5506   PROC(REMOVE,          enc_remove,     dec_remove),
5507   PROC(RENAME,          enc_rename,     dec_rename),
5508   PROC(LINK,            enc_link,       dec_link),
5509   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5510   PROC(CREATE,          enc_create,     dec_create),
5511   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5512   PROC(STATFS,          enc_statfs,     dec_statfs),
5513   PROC(READLINK,        enc_readlink,   dec_readlink),
5514   PROC(READDIR,         enc_readdir,    dec_readdir),
5515   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5516   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5517   PROC(GETACL,          enc_getacl,     dec_getacl),
5518   PROC(SETACL,          enc_setacl,     dec_setacl),
5519   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5520 #if defined(CONFIG_NFS_V4_1)
5521   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5522   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5523   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5524   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5525   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5526 #endif /* CONFIG_NFS_V4_1 */
5527 };
5528
5529 struct rpc_version              nfs_version4 = {
5530         .number                 = 4,
5531         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5532         .procs                  = nfs4_procedures
5533 };
5534
5535 /*
5536  * Local variables:
5537  *  c-basic-offset: 8
5538  * End:
5539  */