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   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 250
 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 252                                 encode_verifier_maxsz + \
 253                                 1 /* co_ownerid.len */ + \
 254                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 255                                 1 /* flags */ + \
 256                                 1 /* spa_how */ + \
 257                                 0 /* SP4_NONE (for now) */ + \
 258                                 1 /* zero implemetation id array */)
 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 260                                 2 /* eir_clientid */ + \
 261                                 1 /* eir_sequenceid */ + \
 262                                 1 /* eir_flags */ + \
 263                                 1 /* spr_how */ + \
 264                                 0 /* SP4_NONE (for now) */ + \
 265                                 2 /* eir_server_owner.so_minor_id */ + \
 266                                 /* eir_server_owner.so_major_id<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 /* eir_server_scope<> */ \
 269                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 270                                 1 /* eir_server_impl_id array length */ + \
 271                                 0 /* ignored eir_server_impl_id contents */)
 272 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 273 #define decode_channel_attrs_maxsz  (6 + \
 274                                      1 /* ca_rdma_ird.len */ + \
 275                                      1 /* ca_rdma_ird */)
 276 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 277                                      2 /* csa_clientid */ + \
 278                                      1 /* csa_sequence */ + \
 279                                      1 /* csa_flags */ + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      1 /* csa_cb_program */ + \
 283                                      1 /* csa_sec_parms.len (1) */ + \
 284                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 285                                      1 /* stamp */ + \
 286                                      1 /* machinename.len */ + \
 287                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 288                                      1 /* uid */ + \
 289                                      1 /* gid */ + \
 290                                      1 /* gids.len (0) */)
 291 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 292                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 293                                      1 /* csr_sequence */ + \
 294                                      1 /* csr_flags */ + \
 295                                      decode_channel_attrs_maxsz + \
 296                                      decode_channel_attrs_maxsz)
 297 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 298 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 299 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 300                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 301 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 302                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 303 #else /* CONFIG_NFS_V4_1 */
 304 #define encode_sequence_maxsz   0
 305 #define decode_sequence_maxsz   0
 306 #endif /* CONFIG_NFS_V4_1 */
 307
 308 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 310 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 311                                 encode_sequence_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_read_maxsz)
 314 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 315                                 decode_sequence_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 decode_read_maxsz)
 318 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 319                                 encode_sequence_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_readlink_maxsz)
 322 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 323                                 decode_sequence_maxsz + \
 324                                 decode_putfh_maxsz + \
 325                                 decode_readlink_maxsz)
 326 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 327                                 encode_sequence_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_readdir_maxsz)
 330 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 331                                 decode_sequence_maxsz + \
 332                                 decode_putfh_maxsz + \
 333                                 decode_readdir_maxsz)
 334 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_write_maxsz + \
 338                                 encode_getattr_maxsz)
 339 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 340                                 decode_sequence_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_write_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_commit_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_commit_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_savefh_maxsz + \
 358                                 encode_open_maxsz + \
 359                                 encode_getfh_maxsz + \
 360                                 encode_getattr_maxsz + \
 361                                 encode_restorefh_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_savefh_maxsz + \
 367                                 decode_open_maxsz + \
 368                                 decode_getfh_maxsz + \
 369                                 decode_getattr_maxsz + \
 370                                 decode_restorefh_maxsz + \
 371                                 decode_getattr_maxsz)
 372 #define NFS4_enc_open_confirm_sz \
 373                                 (compound_encode_hdr_maxsz + \
 374                                  encode_putfh_maxsz + \
 375                                  encode_open_confirm_maxsz)
 376 #define NFS4_dec_open_confirm_sz \
 377                                 (compound_decode_hdr_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_open_confirm_maxsz)
 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 381                                         encode_sequence_maxsz + \
 382                                         encode_putfh_maxsz + \
 383                                         encode_open_maxsz + \
 384                                         encode_getattr_maxsz)
 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 386                                         decode_sequence_maxsz + \
 387                                         decode_putfh_maxsz + \
 388                                         decode_open_maxsz + \
 389                                         decode_getattr_maxsz)
 390 #define NFS4_enc_open_downgrade_sz \
 391                                 (compound_encode_hdr_maxsz + \
 392                                  encode_sequence_maxsz + \
 393                                  encode_putfh_maxsz + \
 394                                  encode_open_downgrade_maxsz + \
 395                                  encode_getattr_maxsz)
 396 #define NFS4_dec_open_downgrade_sz \
 397                                 (compound_decode_hdr_maxsz + \
 398                                  decode_sequence_maxsz + \
 399                                  decode_putfh_maxsz + \
 400                                  decode_open_downgrade_maxsz + \
 401                                  decode_getattr_maxsz)
 402 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 403                                  encode_sequence_maxsz + \
 404                                  encode_putfh_maxsz + \
 405                                  encode_close_maxsz + \
 406                                  encode_getattr_maxsz)
 407 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_close_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_setattr_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_setattr_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_fsinfo_maxsz)
 426 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_fsinfo_maxsz)
 430 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 431                                 encode_renew_maxsz)
 432 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 433                                 decode_renew_maxsz)
 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 435                                 encode_setclientid_maxsz)
 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 437                                 decode_setclientid_maxsz)
 438 #define NFS4_enc_setclientid_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                 encode_setclientid_confirm_maxsz + \
 441                                 encode_putrootfh_maxsz + \
 442                                 encode_fsinfo_maxsz)
 443 #define NFS4_dec_setclientid_confirm_sz \
 444                                 (compound_decode_hdr_maxsz + \
 445                                 decode_setclientid_confirm_maxsz + \
 446                                 decode_putrootfh_maxsz + \
 447                                 decode_fsinfo_maxsz)
 448 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_lock_maxsz)
 452 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_lock_maxsz)
 456 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_lockt_maxsz)
 460 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_lockt_maxsz)
 464 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_locku_maxsz)
 468 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_locku_maxsz)
 472 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_access_maxsz + \
 476                                 encode_getattr_maxsz)
 477 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getattr_maxsz)
 482 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_getattr_maxsz)
 490 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_lookup_maxsz + \
 494                                 encode_getattr_maxsz + \
 495                                 encode_getfh_maxsz)
 496 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 497                                 decode_sequence_maxsz + \
 498                                 decode_putfh_maxsz + \
 499                                 decode_lookup_maxsz + \
 500                                 decode_getattr_maxsz + \
 501                                 decode_getfh_maxsz)
 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putrootfh_maxsz + \
 505                                 encode_getattr_maxsz + \
 506                                 encode_getfh_maxsz)
 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putrootfh_maxsz + \
 510                                 decode_getattr_maxsz + \
 511                                 decode_getfh_maxsz)
 512 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_remove_maxsz + \
 516                                 encode_getattr_maxsz)
 517 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 518                                 decode_sequence_maxsz + \
 519                                 decode_putfh_maxsz + \
 520                                 decode_remove_maxsz + \
 521                                 decode_getattr_maxsz)
 522 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_savefh_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_rename_maxsz + \
 528                                 encode_getattr_maxsz + \
 529                                 encode_restorefh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_savefh_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_rename_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_restorefh_maxsz + \
 539                                 decode_getattr_maxsz)
 540 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 541                                 encode_sequence_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_savefh_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_link_maxsz + \
 546                                 decode_getattr_maxsz + \
 547                                 encode_restorefh_maxsz + \
 548                                 decode_getattr_maxsz)
 549 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_savefh_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_link_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_restorefh_maxsz + \
 557                                 decode_getattr_maxsz)
 558 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_symlink_maxsz + \
 562                                 encode_getattr_maxsz + \
 563                                 encode_getfh_maxsz)
 564 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 565                                 decode_sequence_maxsz + \
 566                                 decode_putfh_maxsz + \
 567                                 decode_symlink_maxsz + \
 568                                 decode_getattr_maxsz + \
 569                                 decode_getfh_maxsz)
 570 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_create_maxsz + \
 575                                 encode_getfh_maxsz + \
 576                                 encode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 encode_getattr_maxsz)
 579 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_create_maxsz + \
 584                                 decode_getfh_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_statfs_maxsz)
 600 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_statfs_maxsz)
 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_delegreturn_maxsz + \
 616                                 encode_getattr_maxsz)
 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_delegreturn_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_getacl_maxsz)
 625 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_getacl_maxsz)
 629 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_setacl_maxsz)
 633 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_setacl_maxsz)
 637 #define NFS4_enc_fs_locations_sz \
 638                                 (compound_encode_hdr_maxsz + \
 639                                  encode_sequence_maxsz + \
 640                                  encode_putfh_maxsz + \
 641                                  encode_lookup_maxsz + \
 642                                  encode_fs_locations_maxsz)
 643 #define NFS4_dec_fs_locations_sz \
 644                                 (compound_decode_hdr_maxsz + \
 645                                  decode_sequence_maxsz + \
 646                                  decode_putfh_maxsz + \
 647                                  decode_lookup_maxsz + \
 648                                  decode_fs_locations_maxsz)
 649 #if defined(CONFIG_NFS_V4_1)
 650 #define NFS4_enc_exchange_id_sz \
 651                                 (compound_encode_hdr_maxsz + \
 652                                  encode_exchange_id_maxsz)
 653 #define NFS4_dec_exchange_id_sz \
 654                                 (compound_decode_hdr_maxsz + \
 655                                  decode_exchange_id_maxsz)
 656 #define NFS4_enc_create_session_sz \
 657                                 (compound_encode_hdr_maxsz + \
 658                                  encode_create_session_maxsz)
 659 #define NFS4_dec_create_session_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_create_session_maxsz)
 662 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 663                                          encode_destroy_session_maxsz)
 664 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 665                                          decode_destroy_session_maxsz)
 666 #define NFS4_enc_sequence_sz \
 667                                 (compound_decode_hdr_maxsz + \
 668                                  encode_sequence_maxsz)
 669 #define NFS4_dec_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_sequence_maxsz)
 672 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 673                                          encode_sequence_maxsz + \
 674                                          encode_putrootfh_maxsz + \
 675                                          encode_fsinfo_maxsz)
 676 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 677                                          decode_sequence_maxsz + \
 678                                          decode_putrootfh_maxsz + \
 679                                          decode_fsinfo_maxsz)
 680 #endif /* CONFIG_NFS_V4_1 */
 681
 682 static const umode_t nfs_type2fmt[] = {
 683         [NF4BAD] = 0,
 684         [NF4REG] = S_IFREG,
 685         [NF4DIR] = S_IFDIR,
 686         [NF4BLK] = S_IFBLK,
 687         [NF4CHR] = S_IFCHR,
 688         [NF4LNK] = S_IFLNK,
 689         [NF4SOCK] = S_IFSOCK,
 690         [NF4FIFO] = S_IFIFO,
 691         [NF4ATTRDIR] = 0,
 692         [NF4NAMEDATTR] = 0,
 693 };
 694
 695 struct compound_hdr {
 696         int32_t         status;
 697         uint32_t        nops;
 698         __be32 *        nops_p;
 699         uint32_t        taglen;
 700         char *          tag;
 701         uint32_t        replen;         /* expected reply words */
 702         u32             minorversion;
 703 };
 704
 705 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 706 {
 707         __be32 *p = xdr_reserve_space(xdr, nbytes);
 708         BUG_ON(!p);
 709         return p;
 710 }
 711
 712 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 713 {
 714         __be32 *p;
 715
 716         p = xdr_reserve_space(xdr, 4 + len);
 717         BUG_ON(p == NULL);
 718         xdr_encode_opaque(p, str, len);
 719 }
 720
 721 static void encode_compound_hdr(struct xdr_stream *xdr,
 722                                 struct rpc_rqst *req,
 723                                 struct compound_hdr *hdr)
 724 {
 725         __be32 *p;
 726         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 727
 728         /* initialize running count of expected bytes in reply.
 729          * NOTE: the replied tag SHOULD be the same is the one sent,
 730          * but this is not required as a MUST for the server to do so. */
 731         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 732
 733         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 734         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 735         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 736         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 737         *p++ = cpu_to_be32(hdr->minorversion);
 738         hdr->nops_p = p;
 739         *p = cpu_to_be32(hdr->nops);
 740 }
 741
 742 static void encode_nops(struct compound_hdr *hdr)
 743 {
 744         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 745         *hdr->nops_p = htonl(hdr->nops);
 746 }
 747
 748 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 749 {
 750         __be32 *p;
 751
 752         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 753         BUG_ON(p == NULL);
 754         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 755 }
 756
 757 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 758 {
 759         char owner_name[IDMAP_NAMESZ];
 760         char owner_group[IDMAP_NAMESZ];
 761         int owner_namelen = 0;
 762         int owner_grouplen = 0;
 763         __be32 *p;
 764         __be32 *q;
 765         int len;
 766         uint32_t bmval0 = 0;
 767         uint32_t bmval1 = 0;
 768
 769         /*
 770          * We reserve enough space to write the entire attribute buffer at once.
 771          * In the worst-case, this would be
 772          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 773          *          = 36 bytes, plus any contribution from variable-length fields
 774          *            such as owner/group.
 775          */
 776         len = 16;
 777
 778         /* Sigh */
 779         if (iap->ia_valid & ATTR_SIZE)
 780                 len += 8;
 781         if (iap->ia_valid & ATTR_MODE)
 782                 len += 4;
 783         if (iap->ia_valid & ATTR_UID) {
 784                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 785                 if (owner_namelen < 0) {
 786                         dprintk("nfs: couldn't resolve uid %d to string\n",
 787                                         iap->ia_uid);
 788                         /* XXX */
 789                         strcpy(owner_name, "nobody");
 790                         owner_namelen = sizeof("nobody") - 1;
 791                         /* goto out; */
 792                 }
 793                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 794         }
 795         if (iap->ia_valid & ATTR_GID) {
 796                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 797                 if (owner_grouplen < 0) {
 798                         dprintk("nfs: couldn't resolve gid %d to string\n",
 799                                         iap->ia_gid);
 800                         strcpy(owner_group, "nobody");
 801                         owner_grouplen = sizeof("nobody") - 1;
 802                         /* goto out; */
 803                 }
 804                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 805         }
 806         if (iap->ia_valid & ATTR_ATIME_SET)
 807                 len += 16;
 808         else if (iap->ia_valid & ATTR_ATIME)
 809                 len += 4;
 810         if (iap->ia_valid & ATTR_MTIME_SET)
 811                 len += 16;
 812         else if (iap->ia_valid & ATTR_MTIME)
 813                 len += 4;
 814         p = reserve_space(xdr, len);
 815
 816         /*
 817          * We write the bitmap length now, but leave the bitmap and the attribute
 818          * buffer length to be backfilled at the end of this routine.
 819          */
 820         *p++ = cpu_to_be32(2);
 821         q = p;
 822         p += 3;
 823
 824         if (iap->ia_valid & ATTR_SIZE) {
 825                 bmval0 |= FATTR4_WORD0_SIZE;
 826                 p = xdr_encode_hyper(p, iap->ia_size);
 827         }
 828         if (iap->ia_valid & ATTR_MODE) {
 829                 bmval1 |= FATTR4_WORD1_MODE;
 830                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 831         }
 832         if (iap->ia_valid & ATTR_UID) {
 833                 bmval1 |= FATTR4_WORD1_OWNER;
 834                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 835         }
 836         if (iap->ia_valid & ATTR_GID) {
 837                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 838                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 839         }
 840         if (iap->ia_valid & ATTR_ATIME_SET) {
 841                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 842                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 843                 *p++ = cpu_to_be32(0);
 844                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 845                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 846         }
 847         else if (iap->ia_valid & ATTR_ATIME) {
 848                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 849                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 850         }
 851         if (iap->ia_valid & ATTR_MTIME_SET) {
 852                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 853                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 854                 *p++ = cpu_to_be32(0);
 855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 856                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 857         }
 858         else if (iap->ia_valid & ATTR_MTIME) {
 859                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 860                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 861         }
 862
 863         /*
 864          * Now we backfill the bitmap and the attribute buffer length.
 865          */
 866         if (len != ((char *)p - (char *)q) + 4) {
 867                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 868                                 len, ((char *)p - (char *)q) + 4);
 869                 BUG();
 870         }
 871         len = (char *)p - (char *)q - 12;
 872         *q++ = htonl(bmval0);
 873         *q++ = htonl(bmval1);
 874         *q = htonl(len);
 875
 876 /* out: */
 877 }
 878
 879 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 880 {
 881         __be32 *p;
 882
 883         p = reserve_space(xdr, 8);
 884         *p++ = cpu_to_be32(OP_ACCESS);
 885         *p = cpu_to_be32(access);
 886         hdr->nops++;
 887         hdr->replen += decode_access_maxsz;
 888 }
 889
 890 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 891 {
 892         __be32 *p;
 893
 894         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 895         *p++ = cpu_to_be32(OP_CLOSE);
 896         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 897         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 898         hdr->nops++;
 899         hdr->replen += decode_close_maxsz;
 900 }
 901
 902 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 903 {
 904         __be32 *p;
 905
 906         p = reserve_space(xdr, 16);
 907         *p++ = cpu_to_be32(OP_COMMIT);
 908         p = xdr_encode_hyper(p, args->offset);
 909         *p = cpu_to_be32(args->count);
 910         hdr->nops++;
 911         hdr->replen += decode_commit_maxsz;
 912 }
 913
 914 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 915 {
 916         __be32 *p;
 917
 918         p = reserve_space(xdr, 8);
 919         *p++ = cpu_to_be32(OP_CREATE);
 920         *p = cpu_to_be32(create->ftype);
 921
 922         switch (create->ftype) {
 923         case NF4LNK:
 924                 p = reserve_space(xdr, 4);
 925                 *p = cpu_to_be32(create->u.symlink.len);
 926                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 927                 break;
 928
 929         case NF4BLK: case NF4CHR:
 930                 p = reserve_space(xdr, 8);
 931                 *p++ = cpu_to_be32(create->u.device.specdata1);
 932                 *p = cpu_to_be32(create->u.device.specdata2);
 933                 break;
 934
 935         default:
 936                 break;
 937         }
 938
 939         encode_string(xdr, create->name->len, create->name->name);
 940         hdr->nops++;
 941         hdr->replen += decode_create_maxsz;
 942
 943         encode_attrs(xdr, create->attrs, create->server);
 944 }
 945
 946 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 947 {
 948         __be32 *p;
 949
 950         p = reserve_space(xdr, 12);
 951         *p++ = cpu_to_be32(OP_GETATTR);
 952         *p++ = cpu_to_be32(1);
 953         *p = cpu_to_be32(bitmap);
 954         hdr->nops++;
 955         hdr->replen += decode_getattr_maxsz;
 956 }
 957
 958 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 959 {
 960         __be32 *p;
 961
 962         p = reserve_space(xdr, 16);
 963         *p++ = cpu_to_be32(OP_GETATTR);
 964         *p++ = cpu_to_be32(2);
 965         *p++ = cpu_to_be32(bm0);
 966         *p = cpu_to_be32(bm1);
 967         hdr->nops++;
 968         hdr->replen += decode_getattr_maxsz;
 969 }
 970
 971 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 972 {
 973         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 974                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 975 }
 976
 977 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 978 {
 979         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 980                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 981 }
 982
 983 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 984 {
 985         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 986                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 987 }
 988
 989 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 990 {
 991         __be32 *p;
 992
 993         p = reserve_space(xdr, 4);
 994         *p = cpu_to_be32(OP_GETFH);
 995         hdr->nops++;
 996         hdr->replen += decode_getfh_maxsz;
 997 }
 998
 999 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1000 {
1001         __be32 *p;
1002
1003         p = reserve_space(xdr, 8 + name->len);
1004         *p++ = cpu_to_be32(OP_LINK);
1005         xdr_encode_opaque(p, name->name, name->len);
1006         hdr->nops++;
1007         hdr->replen += decode_link_maxsz;
1008 }
1009
1010 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1011 {
1012         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1013                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1014         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1015 }
1016
1017 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1018 {
1019         if (fl->fl_end == OFFSET_MAX)
1020                 return ~(uint64_t)0;
1021         return fl->fl_end - fl->fl_start + 1;
1022 }
1023
1024 /*
1025  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1026  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1027  */
1028 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1029 {
1030         __be32 *p;
1031
1032         p = reserve_space(xdr, 32);
1033         *p++ = cpu_to_be32(OP_LOCK);
1034         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1035         *p++ = cpu_to_be32(args->reclaim);
1036         p = xdr_encode_hyper(p, args->fl->fl_start);
1037         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1038         *p = cpu_to_be32(args->new_lock_owner);
1039         if (args->new_lock_owner){
1040                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1041                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1042                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1043                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1044                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1045                 *p++ = cpu_to_be32(16);
1046                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1047                 xdr_encode_hyper(p, args->lock_owner.id);
1048         }
1049         else {
1050                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1051                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1052                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1053         }
1054         hdr->nops++;
1055         hdr->replen += decode_lock_maxsz;
1056 }
1057
1058 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1059 {
1060         __be32 *p;
1061
1062         p = reserve_space(xdr, 52);
1063         *p++ = cpu_to_be32(OP_LOCKT);
1064         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1065         p = xdr_encode_hyper(p, args->fl->fl_start);
1066         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1067         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1068         *p++ = cpu_to_be32(16);
1069         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1070         xdr_encode_hyper(p, args->lock_owner.id);
1071         hdr->nops++;
1072         hdr->replen += decode_lockt_maxsz;
1073 }
1074
1075 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1076 {
1077         __be32 *p;
1078
1079         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1080         *p++ = cpu_to_be32(OP_LOCKU);
1081         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1082         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1083         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1084         p = xdr_encode_hyper(p, args->fl->fl_start);
1085         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1086         hdr->nops++;
1087         hdr->replen += decode_locku_maxsz;
1088 }
1089
1090 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1091 {
1092         int len = name->len;
1093         __be32 *p;
1094
1095         p = reserve_space(xdr, 8 + len);
1096         *p++ = cpu_to_be32(OP_LOOKUP);
1097         xdr_encode_opaque(p, name->name, len);
1098         hdr->nops++;
1099         hdr->replen += decode_lookup_maxsz;
1100 }
1101
1102 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1103 {
1104         __be32 *p;
1105
1106         p = reserve_space(xdr, 8);
1107         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1108         case FMODE_READ:
1109                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1110                 break;
1111         case FMODE_WRITE:
1112                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1113                 break;
1114         case FMODE_READ|FMODE_WRITE:
1115                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1116                 break;
1117         default:
1118                 *p++ = cpu_to_be32(0);
1119         }
1120         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1121 }
1122
1123 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1124 {
1125         __be32 *p;
1126  /*
1127  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1128  * owner 4 = 32
1129  */
1130         p = reserve_space(xdr, 8);
1131         *p++ = cpu_to_be32(OP_OPEN);
1132         *p = cpu_to_be32(arg->seqid->sequence->counter);
1133         encode_share_access(xdr, arg->fmode);
1134         p = reserve_space(xdr, 28);
1135         p = xdr_encode_hyper(p, arg->clientid);
1136         *p++ = cpu_to_be32(16);
1137         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1138         xdr_encode_hyper(p, arg->id);
1139 }
1140
1141 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1142 {
1143         __be32 *p;
1144
1145         p = reserve_space(xdr, 4);
1146         switch(arg->open_flags & O_EXCL) {
1147         case 0:
1148                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1149                 encode_attrs(xdr, arg->u.attrs, arg->server);
1150                 break;
1151         default:
1152                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1153                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1154         }
1155 }
1156
1157 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1158 {
1159         __be32 *p;
1160
1161         p = reserve_space(xdr, 4);
1162         switch (arg->open_flags & O_CREAT) {
1163         case 0:
1164                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1165                 break;
1166         default:
1167                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1168                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1169                 encode_createmode(xdr, arg);
1170         }
1171 }
1172
1173 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1174 {
1175         __be32 *p;
1176
1177         p = reserve_space(xdr, 4);
1178         switch (delegation_type) {
1179         case 0:
1180                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1181                 break;
1182         case FMODE_READ:
1183                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1184                 break;
1185         case FMODE_WRITE|FMODE_READ:
1186                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1187                 break;
1188         default:
1189                 BUG();
1190         }
1191 }
1192
1193 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1194 {
1195         __be32 *p;
1196
1197         p = reserve_space(xdr, 4);
1198         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1199         encode_string(xdr, name->len, name->name);
1200 }
1201
1202 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1203 {
1204         __be32 *p;
1205
1206         p = reserve_space(xdr, 4);
1207         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1208         encode_delegation_type(xdr, type);
1209 }
1210
1211 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1212 {
1213         __be32 *p;
1214
1215         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1216         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1217         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1218         encode_string(xdr, name->len, name->name);
1219 }
1220
1221 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1222 {
1223         encode_openhdr(xdr, arg);
1224         encode_opentype(xdr, arg);
1225         switch (arg->claim) {
1226         case NFS4_OPEN_CLAIM_NULL:
1227                 encode_claim_null(xdr, arg->name);
1228                 break;
1229         case NFS4_OPEN_CLAIM_PREVIOUS:
1230                 encode_claim_previous(xdr, arg->u.delegation_type);
1231                 break;
1232         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1233                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1234                 break;
1235         default:
1236                 BUG();
1237         }
1238         hdr->nops++;
1239         hdr->replen += decode_open_maxsz;
1240 }
1241
1242 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1243 {
1244         __be32 *p;
1245
1246         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1247         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1248         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1249         *p = cpu_to_be32(arg->seqid->sequence->counter);
1250         hdr->nops++;
1251         hdr->replen += decode_open_confirm_maxsz;
1252 }
1253
1254 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1255 {
1256         __be32 *p;
1257
1258         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1259         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1260         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1261         *p = cpu_to_be32(arg->seqid->sequence->counter);
1262         encode_share_access(xdr, arg->fmode);
1263         hdr->nops++;
1264         hdr->replen += decode_open_downgrade_maxsz;
1265 }
1266
1267 static void
1268 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1269 {
1270         int len = fh->size;
1271         __be32 *p;
1272
1273         p = reserve_space(xdr, 8 + len);
1274         *p++ = cpu_to_be32(OP_PUTFH);
1275         xdr_encode_opaque(p, fh->data, len);
1276         hdr->nops++;
1277         hdr->replen += decode_putfh_maxsz;
1278 }
1279
1280 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1281 {
1282         __be32 *p;
1283
1284         p = reserve_space(xdr, 4);
1285         *p = cpu_to_be32(OP_PUTROOTFH);
1286         hdr->nops++;
1287         hdr->replen += decode_putrootfh_maxsz;
1288 }
1289
1290 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1291 {
1292         nfs4_stateid stateid;
1293         __be32 *p;
1294
1295         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1296         if (ctx->state != NULL) {
1297                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1298                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1299         } else
1300                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1301 }
1302
1303 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         p = reserve_space(xdr, 4);
1308         *p = cpu_to_be32(OP_READ);
1309
1310         encode_stateid(xdr, args->context);
1311
1312         p = reserve_space(xdr, 12);
1313         p = xdr_encode_hyper(p, args->offset);
1314         *p = cpu_to_be32(args->count);
1315         hdr->nops++;
1316         hdr->replen += decode_read_maxsz;
1317 }
1318
1319 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1320 {
1321         uint32_t attrs[2] = {
1322                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1323                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1324         };
1325         __be32 *p;
1326
1327         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1328         *p++ = cpu_to_be32(OP_READDIR);
1329         p = xdr_encode_hyper(p, readdir->cookie);
1330         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1331         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1332         *p++ = cpu_to_be32(readdir->count);
1333         *p++ = cpu_to_be32(2);
1334         /* Switch to mounted_on_fileid if the server supports it */
1335         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1336                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1337         else
1338                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1339         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1340         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1341         hdr->nops++;
1342         hdr->replen += decode_readdir_maxsz;
1343         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1344                         __func__,
1345                         (unsigned long long)readdir->cookie,
1346                         ((u32 *)readdir->verifier.data)[0],
1347                         ((u32 *)readdir->verifier.data)[1],
1348                         attrs[0] & readdir->bitmask[0],
1349                         attrs[1] & readdir->bitmask[1]);
1350 }
1351
1352 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1353 {
1354         __be32 *p;
1355
1356         p = reserve_space(xdr, 4);
1357         *p = cpu_to_be32(OP_READLINK);
1358         hdr->nops++;
1359         hdr->replen += decode_readlink_maxsz;
1360 }
1361
1362 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 8 + name->len);
1367         *p++ = cpu_to_be32(OP_REMOVE);
1368         xdr_encode_opaque(p, name->name, name->len);
1369         hdr->nops++;
1370         hdr->replen += decode_remove_maxsz;
1371 }
1372
1373 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1374 {
1375         __be32 *p;
1376
1377         p = reserve_space(xdr, 4);
1378         *p = cpu_to_be32(OP_RENAME);
1379         encode_string(xdr, oldname->len, oldname->name);
1380         encode_string(xdr, newname->len, newname->name);
1381         hdr->nops++;
1382         hdr->replen += decode_rename_maxsz;
1383 }
1384
1385 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1386 {
1387         __be32 *p;
1388
1389         p = reserve_space(xdr, 12);
1390         *p++ = cpu_to_be32(OP_RENEW);
1391         xdr_encode_hyper(p, client_stateid->cl_clientid);
1392         hdr->nops++;
1393         hdr->replen += decode_renew_maxsz;
1394 }
1395
1396 static void
1397 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1398 {
1399         __be32 *p;
1400
1401         p = reserve_space(xdr, 4);
1402         *p = cpu_to_be32(OP_RESTOREFH);
1403         hdr->nops++;
1404         hdr->replen += decode_restorefh_maxsz;
1405 }
1406
1407 static int
1408 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1409 {
1410         __be32 *p;
1411
1412         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1413         *p++ = cpu_to_be32(OP_SETATTR);
1414         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1415         p = reserve_space(xdr, 2*4);
1416         *p++ = cpu_to_be32(1);
1417         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1418         if (arg->acl_len % 4)
1419                 return -EINVAL;
1420         p = reserve_space(xdr, 4);
1421         *p = cpu_to_be32(arg->acl_len);
1422         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1423         hdr->nops++;
1424         hdr->replen += decode_setacl_maxsz;
1425         return 0;
1426 }
1427
1428 static void
1429 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(OP_SAVEFH);
1435         hdr->nops++;
1436         hdr->replen += decode_savefh_maxsz;
1437 }
1438
1439 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1440 {
1441         __be32 *p;
1442
1443         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1444         *p++ = cpu_to_be32(OP_SETATTR);
1445         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1446         hdr->nops++;
1447         hdr->replen += decode_setattr_maxsz;
1448         encode_attrs(xdr, arg->iap, server);
1449 }
1450
1451 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1456         *p++ = cpu_to_be32(OP_SETCLIENTID);
1457         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1458
1459         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1460         p = reserve_space(xdr, 4);
1461         *p = cpu_to_be32(setclientid->sc_prog);
1462         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1463         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1464         p = reserve_space(xdr, 4);
1465         *p = cpu_to_be32(setclientid->sc_cb_ident);
1466         hdr->nops++;
1467         hdr->replen += decode_setclientid_maxsz;
1468 }
1469
1470 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1475         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1476         p = xdr_encode_hyper(p, client_state->cl_clientid);
1477         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1478         hdr->nops++;
1479         hdr->replen += decode_setclientid_confirm_maxsz;
1480 }
1481
1482 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1483 {
1484         __be32 *p;
1485
1486         p = reserve_space(xdr, 4);
1487         *p = cpu_to_be32(OP_WRITE);
1488
1489         encode_stateid(xdr, args->context);
1490
1491         p = reserve_space(xdr, 16);
1492         p = xdr_encode_hyper(p, args->offset);
1493         *p++ = cpu_to_be32(args->stable);
1494         *p = cpu_to_be32(args->count);
1495
1496         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1497         hdr->nops++;
1498         hdr->replen += decode_write_maxsz;
1499 }
1500
1501 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1502 {
1503         __be32 *p;
1504
1505         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1506
1507         *p++ = cpu_to_be32(OP_DELEGRETURN);
1508         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1509         hdr->nops++;
1510         hdr->replen += decode_delegreturn_maxsz;
1511 }
1512
1513 #if defined(CONFIG_NFS_V4_1)
1514 /* NFSv4.1 operations */
1515 static void encode_exchange_id(struct xdr_stream *xdr,
1516                                struct nfs41_exchange_id_args *args,
1517                                struct compound_hdr *hdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1522         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1523         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1524
1525         encode_string(xdr, args->id_len, args->id);
1526
1527         p = reserve_space(xdr, 12);
1528         *p++ = cpu_to_be32(args->flags);
1529         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1530         *p = cpu_to_be32(0);    /* zero length implementation id array */
1531         hdr->nops++;
1532         hdr->replen += decode_exchange_id_maxsz;
1533 }
1534
1535 static void encode_create_session(struct xdr_stream *xdr,
1536                                   struct nfs41_create_session_args *args,
1537                                   struct compound_hdr *hdr)
1538 {
1539         __be32 *p;
1540         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1541         uint32_t len;
1542         struct nfs_client *clp = args->client;
1543
1544         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1545                         clp->cl_ipaddr);
1546
1547         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1548         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1549         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1550         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1551         *p++ = cpu_to_be32(args->flags);                        /*flags */
1552
1553         /* Fore Channel */
1554         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1555         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1556         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1557         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1558         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1559         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1560         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1561
1562         /* Back Channel */
1563         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1564         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1565         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1566         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1567         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1568         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1569         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1570
1571         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1572         *p++ = cpu_to_be32(1);
1573         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1574
1575         /* authsys_parms rfc1831 */
1576         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1577         p = xdr_encode_opaque(p, machine_name, len);
1578         *p++ = cpu_to_be32(0);                          /* UID */
1579         *p++ = cpu_to_be32(0);                          /* GID */
1580         *p = cpu_to_be32(0);                            /* No more gids */
1581         hdr->nops++;
1582         hdr->replen += decode_create_session_maxsz;
1583 }
1584
1585 static void encode_destroy_session(struct xdr_stream *xdr,
1586                                    struct nfs4_session *session,
1587                                    struct compound_hdr *hdr)
1588 {
1589         __be32 *p;
1590         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1591         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1592         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1593         hdr->nops++;
1594         hdr->replen += decode_destroy_session_maxsz;
1595 }
1596 #endif /* CONFIG_NFS_V4_1 */
1597
1598 static void encode_sequence(struct xdr_stream *xdr,
1599                             const struct nfs4_sequence_args *args,
1600                             struct compound_hdr *hdr)
1601 {
1602 #if defined(CONFIG_NFS_V4_1)
1603         struct nfs4_session *session = args->sa_session;
1604         struct nfs4_slot_table *tp;
1605         struct nfs4_slot *slot;
1606         __be32 *p;
1607
1608         if (!session)
1609                 return;
1610
1611         tp = &session->fc_slot_table;
1612
1613         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1614         slot = tp->slots + args->sa_slotid;
1615
1616         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1617         *p++ = cpu_to_be32(OP_SEQUENCE);
1618
1619         /*
1620          * Sessionid + seqid + slotid + max slotid + cache_this
1621          */
1622         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1623                 "max_slotid=%d cache_this=%d\n",
1624                 __func__,
1625                 ((u32 *)session->sess_id.data)[0],
1626                 ((u32 *)session->sess_id.data)[1],
1627                 ((u32 *)session->sess_id.data)[2],
1628                 ((u32 *)session->sess_id.data)[3],
1629                 slot->seq_nr, args->sa_slotid,
1630                 tp->highest_used_slotid, args->sa_cache_this);
1631         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1632         *p++ = cpu_to_be32(slot->seq_nr);
1633         *p++ = cpu_to_be32(args->sa_slotid);
1634         *p++ = cpu_to_be32(tp->highest_used_slotid);
1635         *p = cpu_to_be32(args->sa_cache_this);
1636         hdr->nops++;
1637         hdr->replen += decode_sequence_maxsz;
1638 #endif /* CONFIG_NFS_V4_1 */
1639 }
1640
1641 /*
1642  * END OF "GENERIC" ENCODE ROUTINES.
1643  */
1644
1645 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1646 {
1647 #if defined(CONFIG_NFS_V4_1)
1648         if (args->sa_session)
1649                 return args->sa_session->clp->cl_minorversion;
1650 #endif /* CONFIG_NFS_V4_1 */
1651         return 0;
1652 }
1653
1654 /*
1655  * Encode an ACCESS request
1656  */
1657 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1658 {
1659         struct xdr_stream xdr;
1660         struct compound_hdr hdr = {
1661                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1662         };
1663
1664         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1665         encode_compound_hdr(&xdr, req, &hdr);
1666         encode_sequence(&xdr, &args->seq_args, &hdr);
1667         encode_putfh(&xdr, args->fh, &hdr);
1668         encode_access(&xdr, args->access, &hdr);
1669         encode_getfattr(&xdr, args->bitmask, &hdr);
1670         encode_nops(&hdr);
1671         return 0;
1672 }
1673
1674 /*
1675  * Encode LOOKUP request
1676  */
1677 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1678 {
1679         struct xdr_stream xdr;
1680         struct compound_hdr hdr = {
1681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1682         };
1683
1684         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1685         encode_compound_hdr(&xdr, req, &hdr);
1686         encode_sequence(&xdr, &args->seq_args, &hdr);
1687         encode_putfh(&xdr, args->dir_fh, &hdr);
1688         encode_lookup(&xdr, args->name, &hdr);
1689         encode_getfh(&xdr, &hdr);
1690         encode_getfattr(&xdr, args->bitmask, &hdr);
1691         encode_nops(&hdr);
1692         return 0;
1693 }
1694
1695 /*
1696  * Encode LOOKUP_ROOT request
1697  */
1698 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1699 {
1700         struct xdr_stream xdr;
1701         struct compound_hdr hdr = {
1702                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1703         };
1704
1705         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1706         encode_compound_hdr(&xdr, req, &hdr);
1707         encode_sequence(&xdr, &args->seq_args, &hdr);
1708         encode_putrootfh(&xdr, &hdr);
1709         encode_getfh(&xdr, &hdr);
1710         encode_getfattr(&xdr, args->bitmask, &hdr);
1711         encode_nops(&hdr);
1712         return 0;
1713 }
1714
1715 /*
1716  * Encode REMOVE request
1717  */
1718 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1719 {
1720         struct xdr_stream xdr;
1721         struct compound_hdr hdr = {
1722                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1723         };
1724
1725         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1726         encode_compound_hdr(&xdr, req, &hdr);
1727         encode_sequence(&xdr, &args->seq_args, &hdr);
1728         encode_putfh(&xdr, args->fh, &hdr);
1729         encode_remove(&xdr, &args->name, &hdr);
1730         encode_getfattr(&xdr, args->bitmask, &hdr);
1731         encode_nops(&hdr);
1732         return 0;
1733 }
1734
1735 /*
1736  * Encode RENAME request
1737  */
1738 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1739 {
1740         struct xdr_stream xdr;
1741         struct compound_hdr hdr = {
1742                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1743         };
1744
1745         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746         encode_compound_hdr(&xdr, req, &hdr);
1747         encode_sequence(&xdr, &args->seq_args, &hdr);
1748         encode_putfh(&xdr, args->old_dir, &hdr);
1749         encode_savefh(&xdr, &hdr);
1750         encode_putfh(&xdr, args->new_dir, &hdr);
1751         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1752         encode_getfattr(&xdr, args->bitmask, &hdr);
1753         encode_restorefh(&xdr, &hdr);
1754         encode_getfattr(&xdr, args->bitmask, &hdr);
1755         encode_nops(&hdr);
1756         return 0;
1757 }
1758
1759 /*
1760  * Encode LINK request
1761  */
1762 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1763 {
1764         struct xdr_stream xdr;
1765         struct compound_hdr hdr = {
1766                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1767         };
1768
1769         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770         encode_compound_hdr(&xdr, req, &hdr);
1771         encode_sequence(&xdr, &args->seq_args, &hdr);
1772         encode_putfh(&xdr, args->fh, &hdr);
1773         encode_savefh(&xdr, &hdr);
1774         encode_putfh(&xdr, args->dir_fh, &hdr);
1775         encode_link(&xdr, args->name, &hdr);
1776         encode_getfattr(&xdr, args->bitmask, &hdr);
1777         encode_restorefh(&xdr, &hdr);
1778         encode_getfattr(&xdr, args->bitmask, &hdr);
1779         encode_nops(&hdr);
1780         return 0;
1781 }
1782
1783 /*
1784  * Encode CREATE request
1785  */
1786 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1787 {
1788         struct xdr_stream xdr;
1789         struct compound_hdr hdr = {
1790                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1791         };
1792
1793         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1794         encode_compound_hdr(&xdr, req, &hdr);
1795         encode_sequence(&xdr, &args->seq_args, &hdr);
1796         encode_putfh(&xdr, args->dir_fh, &hdr);
1797         encode_savefh(&xdr, &hdr);
1798         encode_create(&xdr, args, &hdr);
1799         encode_getfh(&xdr, &hdr);
1800         encode_getfattr(&xdr, args->bitmask, &hdr);
1801         encode_restorefh(&xdr, &hdr);
1802         encode_getfattr(&xdr, args->bitmask, &hdr);
1803         encode_nops(&hdr);
1804         return 0;
1805 }
1806
1807 /*
1808  * Encode SYMLINK request
1809  */
1810 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1811 {
1812         return nfs4_xdr_enc_create(req, p, args);
1813 }
1814
1815 /*
1816  * Encode GETATTR request
1817  */
1818 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1819 {
1820         struct xdr_stream xdr;
1821         struct compound_hdr hdr = {
1822                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1823         };
1824
1825         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1826         encode_compound_hdr(&xdr, req, &hdr);
1827         encode_sequence(&xdr, &args->seq_args, &hdr);
1828         encode_putfh(&xdr, args->fh, &hdr);
1829         encode_getfattr(&xdr, args->bitmask, &hdr);
1830         encode_nops(&hdr);
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode a CLOSE request
1836  */
1837 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1838 {
1839         struct xdr_stream xdr;
1840         struct compound_hdr hdr = {
1841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842         };
1843
1844         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845         encode_compound_hdr(&xdr, req, &hdr);
1846         encode_sequence(&xdr, &args->seq_args, &hdr);
1847         encode_putfh(&xdr, args->fh, &hdr);
1848         encode_close(&xdr, args, &hdr);
1849         encode_getfattr(&xdr, args->bitmask, &hdr);
1850         encode_nops(&hdr);
1851         return 0;
1852 }
1853
1854 /*
1855  * Encode an OPEN request
1856  */
1857 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1858 {
1859         struct xdr_stream xdr;
1860         struct compound_hdr hdr = {
1861                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1862         };
1863
1864         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1865         encode_compound_hdr(&xdr, req, &hdr);
1866         encode_sequence(&xdr, &args->seq_args, &hdr);
1867         encode_putfh(&xdr, args->fh, &hdr);
1868         encode_savefh(&xdr, &hdr);
1869         encode_open(&xdr, args, &hdr);
1870         encode_getfh(&xdr, &hdr);
1871         encode_getfattr(&xdr, args->bitmask, &hdr);
1872         encode_restorefh(&xdr, &hdr);
1873         encode_getfattr(&xdr, args->bitmask, &hdr);
1874         encode_nops(&hdr);
1875         return 0;
1876 }
1877
1878 /*
1879  * Encode an OPEN_CONFIRM request
1880  */
1881 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1882 {
1883         struct xdr_stream xdr;
1884         struct compound_hdr hdr = {
1885                 .nops   = 0,
1886         };
1887
1888         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1889         encode_compound_hdr(&xdr, req, &hdr);
1890         encode_putfh(&xdr, args->fh, &hdr);
1891         encode_open_confirm(&xdr, args, &hdr);
1892         encode_nops(&hdr);
1893         return 0;
1894 }
1895
1896 /*
1897  * Encode an OPEN request with no attributes.
1898  */
1899 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1900 {
1901         struct xdr_stream xdr;
1902         struct compound_hdr hdr = {
1903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1904         };
1905
1906         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1907         encode_compound_hdr(&xdr, req, &hdr);
1908         encode_sequence(&xdr, &args->seq_args, &hdr);
1909         encode_putfh(&xdr, args->fh, &hdr);
1910         encode_open(&xdr, args, &hdr);
1911         encode_getfattr(&xdr, args->bitmask, &hdr);
1912         encode_nops(&hdr);
1913         return 0;
1914 }
1915
1916 /*
1917  * Encode an OPEN_DOWNGRADE request
1918  */
1919 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1924         };
1925
1926         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1927         encode_compound_hdr(&xdr, req, &hdr);
1928         encode_sequence(&xdr, &args->seq_args, &hdr);
1929         encode_putfh(&xdr, args->fh, &hdr);
1930         encode_open_downgrade(&xdr, args, &hdr);
1931         encode_getfattr(&xdr, args->bitmask, &hdr);
1932         encode_nops(&hdr);
1933         return 0;
1934 }
1935
1936 /*
1937  * Encode a LOCK request
1938  */
1939 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1940 {
1941         struct xdr_stream xdr;
1942         struct compound_hdr hdr = {
1943                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1944         };
1945
1946         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1947         encode_compound_hdr(&xdr, req, &hdr);
1948         encode_sequence(&xdr, &args->seq_args, &hdr);
1949         encode_putfh(&xdr, args->fh, &hdr);
1950         encode_lock(&xdr, args, &hdr);
1951         encode_nops(&hdr);
1952         return 0;
1953 }
1954
1955 /*
1956  * Encode a LOCKT request
1957  */
1958 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1963         };
1964
1965         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966         encode_compound_hdr(&xdr, req, &hdr);
1967         encode_sequence(&xdr, &args->seq_args, &hdr);
1968         encode_putfh(&xdr, args->fh, &hdr);
1969         encode_lockt(&xdr, args, &hdr);
1970         encode_nops(&hdr);
1971         return 0;
1972 }
1973
1974 /*
1975  * Encode a LOCKU request
1976  */
1977 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1978 {
1979         struct xdr_stream xdr;
1980         struct compound_hdr hdr = {
1981                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1982         };
1983
1984         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1985         encode_compound_hdr(&xdr, req, &hdr);
1986         encode_sequence(&xdr, &args->seq_args, &hdr);
1987         encode_putfh(&xdr, args->fh, &hdr);
1988         encode_locku(&xdr, args, &hdr);
1989         encode_nops(&hdr);
1990         return 0;
1991 }
1992
1993 /*
1994  * Encode a READLINK request
1995  */
1996 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1997 {
1998         struct xdr_stream xdr;
1999         struct compound_hdr hdr = {
2000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2001         };
2002
2003         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2004         encode_compound_hdr(&xdr, req, &hdr);
2005         encode_sequence(&xdr, &args->seq_args, &hdr);
2006         encode_putfh(&xdr, args->fh, &hdr);
2007         encode_readlink(&xdr, args, req, &hdr);
2008
2009         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2010                         args->pgbase, args->pglen);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  * Encode a READDIR request
2017  */
2018 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026         encode_compound_hdr(&xdr, req, &hdr);
2027         encode_sequence(&xdr, &args->seq_args, &hdr);
2028         encode_putfh(&xdr, args->fh, &hdr);
2029         encode_readdir(&xdr, args, req, &hdr);
2030
2031         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2032                          args->pgbase, args->count);
2033         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2034                         __func__, hdr.replen << 2, args->pages,
2035                         args->pgbase, args->count);
2036         encode_nops(&hdr);
2037         return 0;
2038 }
2039
2040 /*
2041  * Encode a READ request
2042  */
2043 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2044 {
2045         struct xdr_stream xdr;
2046         struct compound_hdr hdr = {
2047                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2048         };
2049
2050         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2051         encode_compound_hdr(&xdr, req, &hdr);
2052         encode_sequence(&xdr, &args->seq_args, &hdr);
2053         encode_putfh(&xdr, args->fh, &hdr);
2054         encode_read(&xdr, args, &hdr);
2055
2056         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2057                          args->pages, args->pgbase, args->count);
2058         req->rq_rcv_buf.flags |= XDRBUF_READ;
2059         encode_nops(&hdr);
2060         return 0;
2061 }
2062
2063 /*
2064  * Encode an SETATTR request
2065  */
2066 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2067 {
2068         struct xdr_stream xdr;
2069         struct compound_hdr hdr = {
2070                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2071         };
2072
2073         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2074         encode_compound_hdr(&xdr, req, &hdr);
2075         encode_sequence(&xdr, &args->seq_args, &hdr);
2076         encode_putfh(&xdr, args->fh, &hdr);
2077         encode_setattr(&xdr, args, args->server, &hdr);
2078         encode_getfattr(&xdr, args->bitmask, &hdr);
2079         encode_nops(&hdr);
2080         return 0;
2081 }
2082
2083 /*
2084  * Encode a GETACL request
2085  */
2086 static int
2087 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2088                 struct nfs_getaclargs *args)
2089 {
2090         struct xdr_stream xdr;
2091         struct compound_hdr hdr = {
2092                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093         };
2094         uint32_t replen;
2095
2096         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2097         encode_compound_hdr(&xdr, req, &hdr);
2098         encode_sequence(&xdr, &args->seq_args, &hdr);
2099         encode_putfh(&xdr, args->fh, &hdr);
2100         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2101         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2102
2103         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2104                 args->acl_pages, args->acl_pgbase, args->acl_len);
2105         encode_nops(&hdr);
2106         return 0;
2107 }
2108
2109 /*
2110  * Encode a WRITE request
2111  */
2112 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2113 {
2114         struct xdr_stream xdr;
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2120         encode_compound_hdr(&xdr, req, &hdr);
2121         encode_sequence(&xdr, &args->seq_args, &hdr);
2122         encode_putfh(&xdr, args->fh, &hdr);
2123         encode_write(&xdr, args, &hdr);
2124         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2125         encode_getfattr(&xdr, args->bitmask, &hdr);
2126         encode_nops(&hdr);
2127         return 0;
2128 }
2129
2130 /*
2131  *  a COMMIT request
2132  */
2133 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2134 {
2135         struct xdr_stream xdr;
2136         struct compound_hdr hdr = {
2137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138         };
2139
2140         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2141         encode_compound_hdr(&xdr, req, &hdr);
2142         encode_sequence(&xdr, &args->seq_args, &hdr);
2143         encode_putfh(&xdr, args->fh, &hdr);
2144         encode_commit(&xdr, args, &hdr);
2145         encode_getfattr(&xdr, args->bitmask, &hdr);
2146         encode_nops(&hdr);
2147         return 0;
2148 }
2149
2150 /*
2151  * FSINFO request
2152  */
2153 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2154 {
2155         struct xdr_stream xdr;
2156         struct compound_hdr hdr = {
2157                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2158         };
2159
2160         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2161         encode_compound_hdr(&xdr, req, &hdr);
2162         encode_sequence(&xdr, &args->seq_args, &hdr);
2163         encode_putfh(&xdr, args->fh, &hdr);
2164         encode_fsinfo(&xdr, args->bitmask, &hdr);
2165         encode_nops(&hdr);
2166         return 0;
2167 }
2168
2169 /*
2170  * a PATHCONF request
2171  */
2172 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2173 {
2174         struct xdr_stream xdr;
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2180         encode_compound_hdr(&xdr, req, &hdr);
2181         encode_sequence(&xdr, &args->seq_args, &hdr);
2182         encode_putfh(&xdr, args->fh, &hdr);
2183         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2184                            &hdr);
2185         encode_nops(&hdr);
2186         return 0;
2187 }
2188
2189 /*
2190  * a STATFS request
2191  */
2192 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2193 {
2194         struct xdr_stream xdr;
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2200         encode_compound_hdr(&xdr, req, &hdr);
2201         encode_sequence(&xdr, &args->seq_args, &hdr);
2202         encode_putfh(&xdr, args->fh, &hdr);
2203         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2204                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2205         encode_nops(&hdr);
2206         return 0;
2207 }
2208
2209 /*
2210  * GETATTR_BITMAP request
2211  */
2212 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2213                                     struct nfs4_server_caps_arg *args)
2214 {
2215         struct xdr_stream xdr;
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2221         encode_compound_hdr(&xdr, req, &hdr);
2222         encode_sequence(&xdr, &args->seq_args, &hdr);
2223         encode_putfh(&xdr, args->fhandle, &hdr);
2224         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2225                            FATTR4_WORD0_LINK_SUPPORT|
2226                            FATTR4_WORD0_SYMLINK_SUPPORT|
2227                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2228         encode_nops(&hdr);
2229         return 0;
2230 }
2231
2232 /*
2233  * a RENEW request
2234  */
2235 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2236 {
2237         struct xdr_stream xdr;
2238         struct compound_hdr hdr = {
2239                 .nops   = 0,
2240         };
2241
2242         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243         encode_compound_hdr(&xdr, req, &hdr);
2244         encode_renew(&xdr, clp, &hdr);
2245         encode_nops(&hdr);
2246         return 0;
2247 }
2248
2249 /*
2250  * a SETCLIENTID request
2251  */
2252 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2253 {
2254         struct xdr_stream xdr;
2255         struct compound_hdr hdr = {
2256                 .nops   = 0,
2257         };
2258
2259         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2260         encode_compound_hdr(&xdr, req, &hdr);
2261         encode_setclientid(&xdr, sc, &hdr);
2262         encode_nops(&hdr);
2263         return 0;
2264 }
2265
2266 /*
2267  * a SETCLIENTID_CONFIRM request
2268  */
2269 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2270 {
2271         struct xdr_stream xdr;
2272         struct compound_hdr hdr = {
2273                 .nops   = 0,
2274         };
2275         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2276
2277         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2278         encode_compound_hdr(&xdr, req, &hdr);
2279         encode_setclientid_confirm(&xdr, clp, &hdr);
2280         encode_putrootfh(&xdr, &hdr);
2281         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2282         encode_nops(&hdr);
2283         return 0;
2284 }
2285
2286 /*
2287  * DELEGRETURN request
2288  */
2289 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2290 {
2291         struct xdr_stream xdr;
2292         struct compound_hdr hdr = {
2293                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294         };
2295
2296         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2297         encode_compound_hdr(&xdr, req, &hdr);
2298         encode_sequence(&xdr, &args->seq_args, &hdr);
2299         encode_putfh(&xdr, args->fhandle, &hdr);
2300         encode_delegreturn(&xdr, args->stateid, &hdr);
2301         encode_getfattr(&xdr, args->bitmask, &hdr);
2302         encode_nops(&hdr);
2303         return 0;
2304 }
2305
2306 /*
2307  * Encode FS_LOCATIONS request
2308  */
2309 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2310 {
2311         struct xdr_stream xdr;
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315         uint32_t replen;
2316
2317         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2318         encode_compound_hdr(&xdr, req, &hdr);
2319         encode_sequence(&xdr, &args->seq_args, &hdr);
2320         encode_putfh(&xdr, args->dir_fh, &hdr);
2321         encode_lookup(&xdr, args->name, &hdr);
2322         replen = hdr.replen;    /* get the attribute into args->page */
2323         encode_fs_locations(&xdr, args->bitmask, &hdr);
2324
2325         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2326                         0, PAGE_SIZE);
2327         encode_nops(&hdr);
2328         return 0;
2329 }
2330
2331 #if defined(CONFIG_NFS_V4_1)
2332 /*
2333  * EXCHANGE_ID request
2334  */
2335 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2336                                     struct nfs41_exchange_id_args *args)
2337 {
2338         struct xdr_stream xdr;
2339         struct compound_hdr hdr = {
2340                 .minorversion = args->client->cl_minorversion,
2341         };
2342
2343         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2344         encode_compound_hdr(&xdr, req, &hdr);
2345         encode_exchange_id(&xdr, args, &hdr);
2346         encode_nops(&hdr);
2347         return 0;
2348 }
2349
2350 /*
2351  * a CREATE_SESSION request
2352  */
2353 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2354                                        struct nfs41_create_session_args *args)
2355 {
2356         struct xdr_stream xdr;
2357         struct compound_hdr hdr = {
2358                 .minorversion = args->client->cl_minorversion,
2359         };
2360
2361         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2362         encode_compound_hdr(&xdr, req, &hdr);
2363         encode_create_session(&xdr, args, &hdr);
2364         encode_nops(&hdr);
2365         return 0;
2366 }
2367
2368 /*
2369  * a DESTROY_SESSION request
2370  */
2371 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2372                                         struct nfs4_session *session)
2373 {
2374         struct xdr_stream xdr;
2375         struct compound_hdr hdr = {
2376                 .minorversion = session->clp->cl_minorversion,
2377         };
2378
2379         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2380         encode_compound_hdr(&xdr, req, &hdr);
2381         encode_destroy_session(&xdr, session, &hdr);
2382         encode_nops(&hdr);
2383         return 0;
2384 }
2385
2386 /*
2387  * a SEQUENCE request
2388  */
2389 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2390                                  struct nfs4_sequence_args *args)
2391 {
2392         struct xdr_stream xdr;
2393         struct compound_hdr hdr = {
2394                 .minorversion = nfs4_xdr_minorversion(args),
2395         };
2396
2397         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2398         encode_compound_hdr(&xdr, req, &hdr);
2399         encode_sequence(&xdr, args, &hdr);
2400         encode_nops(&hdr);
2401         return 0;
2402 }
2403
2404 /*
2405  * a GET_LEASE_TIME request
2406  */
2407 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2408                                        struct nfs4_get_lease_time_args *args)
2409 {
2410         struct xdr_stream xdr;
2411         struct compound_hdr hdr = {
2412                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2413         };
2414         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2415
2416         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2417         encode_compound_hdr(&xdr, req, &hdr);
2418         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2419         encode_putrootfh(&xdr, &hdr);
2420         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2421         encode_nops(&hdr);
2422         return 0;
2423 }
2424 #endif /* CONFIG_NFS_V4_1 */
2425
2426 /*
2427  * START OF "GENERIC" DECODE ROUTINES.
2428  *   These may look a little ugly since they are imported from a "generic"
2429  * set of XDR encode/decode routines which are intended to be shared by
2430  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2431  *
2432  * If the pain of reading these is too great, it should be a straightforward
2433  * task to translate them into Linux-specific versions which are more
2434  * consistent with the style used in NFSv2/v3...
2435  */
2436 #define READ_BUF(nbytes)  do { \
2437         p = xdr_inline_decode(xdr, nbytes); \
2438         if (unlikely(!p)) { \
2439                 print_overflow_msg(__func__, xdr); \
2440                 return -EIO; \
2441         } \
2442 } while (0)
2443
2444 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2445 {
2446         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2447                 "Remaining buffer length is %tu words.\n",
2448                 func, xdr->end - xdr->p);
2449 }
2450
2451 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2452 {
2453         __be32 *p;
2454
2455         READ_BUF(4);
2456         *len = be32_to_cpup(p++);
2457         READ_BUF(*len);
2458         *string = (char *)p;
2459         return 0;
2460 }
2461
2462 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2463 {
2464         __be32 *p;
2465
2466         READ_BUF(8);
2467         hdr->status = be32_to_cpup(p++);
2468         hdr->taglen = be32_to_cpup(p++);
2469
2470         READ_BUF(hdr->taglen + 4);
2471         hdr->tag = (char *)p;
2472         p += XDR_QUADLEN(hdr->taglen);
2473         hdr->nops = be32_to_cpup(p++);
2474         if (unlikely(hdr->nops < 1))
2475                 return nfs4_stat_to_errno(hdr->status);
2476         return 0;
2477 }
2478
2479 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2480 {
2481         __be32 *p;
2482         uint32_t opnum;
2483         int32_t nfserr;
2484
2485         READ_BUF(8);
2486         opnum = be32_to_cpup(p++);
2487         if (opnum != expected) {
2488                 dprintk("nfs: Server returned operation"
2489                         " %d but we issued a request for %d\n",
2490                                 opnum, expected);
2491                 return -EIO;
2492         }
2493         nfserr = be32_to_cpup(p++);
2494         if (nfserr != NFS_OK)
2495                 return nfs4_stat_to_errno(nfserr);
2496         return 0;
2497 }
2498
2499 /* Dummy routine */
2500 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2501 {
2502         __be32 *p;
2503         unsigned int strlen;
2504         char *str;
2505
2506         READ_BUF(12);
2507         return decode_opaque_inline(xdr, &strlen, &str);
2508 }
2509
2510 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2511 {
2512         uint32_t bmlen;
2513         __be32 *p;
2514
2515         READ_BUF(4);
2516         bmlen = be32_to_cpup(p++);
2517
2518         bitmap[0] = bitmap[1] = 0;
2519         READ_BUF((bmlen << 2));
2520         if (bmlen > 0) {
2521                 bitmap[0] = be32_to_cpup(p++);
2522                 if (bmlen > 1)
2523                         bitmap[1] = be32_to_cpup(p++);
2524         }
2525         return 0;
2526 }
2527
2528 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2529 {
2530         __be32 *p;
2531
2532         READ_BUF(4);
2533         *attrlen = be32_to_cpup(p++);
2534         *savep = xdr->p;
2535         return 0;
2536 }
2537
2538 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2539 {
2540         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2541                 decode_attr_bitmap(xdr, bitmask);
2542                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2543         } else
2544                 bitmask[0] = bitmask[1] = 0;
2545         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2546         return 0;
2547 }
2548
2549 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2550 {
2551         __be32 *p;
2552         int ret = 0;
2553
2554         *type = 0;
2555         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2556                 return -EIO;
2557         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2558                 READ_BUF(4);
2559                 *type = be32_to_cpup(p++);
2560                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2561                         dprintk("%s: bad type %d\n", __func__, *type);
2562                         return -EIO;
2563                 }
2564                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2565                 ret = NFS_ATTR_FATTR_TYPE;
2566         }
2567         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2568         return ret;
2569 }
2570
2571 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2572 {
2573         __be32 *p;
2574         int ret = 0;
2575
2576         *change = 0;
2577         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2578                 return -EIO;
2579         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2580                 READ_BUF(8);
2581                 p = xdr_decode_hyper(p, change);
2582                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2583                 ret = NFS_ATTR_FATTR_CHANGE;
2584         }
2585         dprintk("%s: change attribute=%Lu\n", __func__,
2586                         (unsigned long long)*change);
2587         return ret;
2588 }
2589
2590 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2591 {
2592         __be32 *p;
2593         int ret = 0;
2594
2595         *size = 0;
2596         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2597                 return -EIO;
2598         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2599                 READ_BUF(8);
2600                 p = xdr_decode_hyper(p, size);
2601                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2602                 ret = NFS_ATTR_FATTR_SIZE;
2603         }
2604         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2605         return ret;
2606 }
2607
2608 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2609 {
2610         __be32 *p;
2611
2612         *res = 0;
2613         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2614                 return -EIO;
2615         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2616                 READ_BUF(4);
2617                 *res = be32_to_cpup(p++);
2618                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2619         }
2620         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2621         return 0;
2622 }
2623
2624 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2625 {
2626         __be32 *p;
2627
2628         *res = 0;
2629         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2630                 return -EIO;
2631         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2632                 READ_BUF(4);
2633                 *res = be32_to_cpup(p++);
2634                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2635         }
2636         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2637         return 0;
2638 }
2639
2640 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2641 {
2642         __be32 *p;
2643         int ret = 0;
2644
2645         fsid->major = 0;
2646         fsid->minor = 0;
2647         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2648                 return -EIO;
2649         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2650                 READ_BUF(16);
2651                 p = xdr_decode_hyper(p, &fsid->major);
2652                 p = xdr_decode_hyper(p, &fsid->minor);
2653                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2654                 ret = NFS_ATTR_FATTR_FSID;
2655         }
2656         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2657                         (unsigned long long)fsid->major,
2658                         (unsigned long long)fsid->minor);
2659         return ret;
2660 }
2661
2662 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2663 {
2664         __be32 *p;
2665
2666         *res = 60;
2667         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2668                 return -EIO;
2669         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2670                 READ_BUF(4);
2671                 *res = be32_to_cpup(p++);
2672                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2673         }
2674         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2675         return 0;
2676 }
2677
2678 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2679 {
2680         __be32 *p;
2681
2682         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2683         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2684                 return -EIO;
2685         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2686                 READ_BUF(4);
2687                 *res = be32_to_cpup(p++);
2688                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2689         }
2690         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2691         return 0;
2692 }
2693
2694 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2695 {
2696         __be32 *p;
2697         int ret = 0;
2698
2699         *fileid = 0;
2700         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2701                 return -EIO;
2702         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2703                 READ_BUF(8);
2704                 p = xdr_decode_hyper(p, fileid);
2705                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2706                 ret = NFS_ATTR_FATTR_FILEID;
2707         }
2708         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2709         return ret;
2710 }
2711
2712 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2713 {
2714         __be32 *p;
2715         int ret = 0;
2716
2717         *fileid = 0;
2718         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2719                 return -EIO;
2720         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2721                 READ_BUF(8);
2722                 p = xdr_decode_hyper(p, fileid);
2723                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2724                 ret = NFS_ATTR_FATTR_FILEID;
2725         }
2726         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2727         return ret;
2728 }
2729
2730 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2731 {
2732         __be32 *p;
2733         int status = 0;
2734
2735         *res = 0;
2736         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2737                 return -EIO;
2738         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2739                 READ_BUF(8);
2740                 p = xdr_decode_hyper(p, res);
2741                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2742         }
2743         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2744         return status;
2745 }
2746
2747 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2748 {
2749         __be32 *p;
2750         int status = 0;
2751
2752         *res = 0;
2753         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2754                 return -EIO;
2755         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2756                 READ_BUF(8);
2757                 p = xdr_decode_hyper(p, res);
2758                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2759         }
2760         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2761         return status;
2762 }
2763
2764 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2765 {
2766         __be32 *p;
2767         int status = 0;
2768
2769         *res = 0;
2770         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2771                 return -EIO;
2772         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2773                 READ_BUF(8);
2774                 p = xdr_decode_hyper(p, res);
2775                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2776         }
2777         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2778         return status;
2779 }
2780
2781 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2782 {
2783         u32 n;
2784         __be32 *p;
2785         int status = 0;
2786
2787         READ_BUF(4);
2788         n = be32_to_cpup(p++);
2789         if (n == 0)
2790                 goto root_path;
2791         dprintk("path ");
2792         path->ncomponents = 0;
2793         while (path->ncomponents < n) {
2794                 struct nfs4_string *component = &path->components[path->ncomponents];
2795                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2796                 if (unlikely(status != 0))
2797                         goto out_eio;
2798                 if (path->ncomponents != n)
2799                         dprintk("/");
2800                 dprintk("%s", component->data);
2801                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2802                         path->ncomponents++;
2803                 else {
2804                         dprintk("cannot parse %d components in path\n", n);
2805                         goto out_eio;
2806                 }
2807         }
2808 out:
2809         dprintk("\n");
2810         return status;
2811 root_path:
2812 /* a root pathname is sent as a zero component4 */
2813         path->ncomponents = 1;
2814         path->components[0].len=0;
2815         path->components[0].data=NULL;
2816         dprintk("path /\n");
2817         goto out;
2818 out_eio:
2819         dprintk(" status %d", status);
2820         status = -EIO;
2821         goto out;
2822 }
2823
2824 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2825 {
2826         int n;
2827         __be32 *p;
2828         int status = -EIO;
2829
2830         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2831                 goto out;
2832         status = 0;
2833         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2834                 goto out;
2835         dprintk("%s: fsroot ", __func__);
2836         status = decode_pathname(xdr, &res->fs_path);
2837         if (unlikely(status != 0))
2838                 goto out;
2839         READ_BUF(4);
2840         n = be32_to_cpup(p++);
2841         if (n <= 0)
2842                 goto out_eio;
2843         res->nlocations = 0;
2844         while (res->nlocations < n) {
2845                 u32 m;
2846                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2847
2848                 READ_BUF(4);
2849                 m = be32_to_cpup(p++);
2850
2851                 loc->nservers = 0;
2852                 dprintk("%s: servers ", __func__);
2853                 while (loc->nservers < m) {
2854                         struct nfs4_string *server = &loc->servers[loc->nservers];
2855                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2856                         if (unlikely(status != 0))
2857                                 goto out_eio;
2858                         dprintk("%s ", server->data);
2859                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2860                                 loc->nservers++;
2861                         else {
2862                                 unsigned int i;
2863                                 dprintk("%s: using first %u of %u servers "
2864                                         "returned for location %u\n",
2865                                                 __func__,
2866                                                 NFS4_FS_LOCATION_MAXSERVERS,
2867                                                 m, res->nlocations);
2868                                 for (i = loc->nservers; i < m; i++) {
2869                                         unsigned int len;
2870                                         char *data;
2871                                         status = decode_opaque_inline(xdr, &len, &data);
2872                                         if (unlikely(status != 0))
2873                                                 goto out_eio;
2874                                 }
2875                         }
2876                 }
2877                 status = decode_pathname(xdr, &loc->rootpath);
2878                 if (unlikely(status != 0))
2879                         goto out_eio;
2880                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2881                         res->nlocations++;
2882         }
2883         if (res->nlocations != 0)
2884                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2885 out:
2886         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2887         return status;
2888 out_eio:
2889         status = -EIO;
2890         goto out;
2891 }
2892
2893 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2894 {
2895         __be32 *p;
2896         int status = 0;
2897
2898         *res = 0;
2899         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2900                 return -EIO;
2901         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2902                 READ_BUF(8);
2903                 p = xdr_decode_hyper(p, res);
2904                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2905         }
2906         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2907         return status;
2908 }
2909
2910 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2911 {
2912         __be32 *p;
2913         int status = 0;
2914
2915         *maxlink = 1;
2916         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2917                 return -EIO;
2918         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2919                 READ_BUF(4);
2920                 *maxlink = be32_to_cpup(p++);
2921                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2922         }
2923         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2924         return status;
2925 }
2926
2927 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2928 {
2929         __be32 *p;
2930         int status = 0;
2931
2932         *maxname = 1024;
2933         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2934                 return -EIO;
2935         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2936                 READ_BUF(4);
2937                 *maxname = be32_to_cpup(p++);
2938                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2939         }
2940         dprintk("%s: maxname=%u\n", __func__, *maxname);
2941         return status;
2942 }
2943
2944 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2945 {
2946         __be32 *p;
2947         int status = 0;
2948
2949         *res = 1024;
2950         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2951                 return -EIO;
2952         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2953                 uint64_t maxread;
2954                 READ_BUF(8);
2955                 p = xdr_decode_hyper(p, &maxread);
2956                 if (maxread > 0x7FFFFFFF)
2957                         maxread = 0x7FFFFFFF;
2958                 *res = (uint32_t)maxread;
2959                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2960         }
2961         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2962         return status;
2963 }
2964
2965 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2966 {
2967         __be32 *p;
2968         int status = 0;
2969
2970         *res = 1024;
2971         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2972                 return -EIO;
2973         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2974                 uint64_t maxwrite;
2975                 READ_BUF(8);
2976                 p = xdr_decode_hyper(p, &maxwrite);
2977                 if (maxwrite > 0x7FFFFFFF)
2978                         maxwrite = 0x7FFFFFFF;
2979                 *res = (uint32_t)maxwrite;
2980                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2981         }
2982         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2983         return status;
2984 }
2985
2986 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2987 {
2988         uint32_t tmp;
2989         __be32 *p;
2990         int ret = 0;
2991
2992         *mode = 0;
2993         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2994                 return -EIO;
2995         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2996                 READ_BUF(4);
2997                 tmp = be32_to_cpup(p++);
2998                 *mode = tmp & ~S_IFMT;
2999                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3000                 ret = NFS_ATTR_FATTR_MODE;
3001         }
3002         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3003         return ret;
3004 }
3005
3006 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3007 {
3008         __be32 *p;
3009         int ret = 0;
3010
3011         *nlink = 1;
3012         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3013                 return -EIO;
3014         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3015                 READ_BUF(4);
3016                 *nlink = be32_to_cpup(p++);
3017                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3018                 ret = NFS_ATTR_FATTR_NLINK;
3019         }
3020         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3021         return ret;
3022 }
3023
3024 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3025 {
3026         uint32_t len;
3027         __be32 *p;
3028         int ret = 0;
3029
3030         *uid = -2;
3031         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3032                 return -EIO;
3033         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3034                 READ_BUF(4);
3035                 len = be32_to_cpup(p++);
3036                 READ_BUF(len);
3037                 if (len < XDR_MAX_NETOBJ) {
3038                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3039                                 ret = NFS_ATTR_FATTR_OWNER;
3040                         else
3041                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3042                                                 __func__);
3043                 } else
3044                         dprintk("%s: name too long (%u)!\n",
3045                                         __func__, len);
3046                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3047         }
3048         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3049         return ret;
3050 }
3051
3052 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3053 {
3054         uint32_t len;
3055         __be32 *p;
3056         int ret = 0;
3057
3058         *gid = -2;
3059         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3060                 return -EIO;
3061         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3062                 READ_BUF(4);
3063                 len = be32_to_cpup(p++);
3064                 READ_BUF(len);
3065                 if (len < XDR_MAX_NETOBJ) {
3066                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3067                                 ret = NFS_ATTR_FATTR_GROUP;
3068                         else
3069                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3070                                                 __func__);
3071                 } else
3072                         dprintk("%s: name too long (%u)!\n",
3073                                         __func__, len);
3074                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3075         }
3076         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3077         return ret;
3078 }
3079
3080 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3081 {
3082         uint32_t major = 0, minor = 0;
3083         __be32 *p;
3084         int ret = 0;
3085
3086         *rdev = MKDEV(0,0);
3087         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3088                 return -EIO;
3089         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3090                 dev_t tmp;
3091
3092                 READ_BUF(8);
3093                 major = be32_to_cpup(p++);
3094                 minor = be32_to_cpup(p++);
3095                 tmp = MKDEV(major, minor);
3096                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3097                         *rdev = tmp;
3098                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3099                 ret = NFS_ATTR_FATTR_RDEV;
3100         }
3101         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3102         return ret;
3103 }
3104
3105 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3106 {
3107         __be32 *p;
3108         int status = 0;
3109
3110         *res = 0;
3111         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3112                 return -EIO;
3113         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3114                 READ_BUF(8);
3115                 p = xdr_decode_hyper(p, res);
3116                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3117         }
3118         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3119         return status;
3120 }
3121
3122 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3123 {
3124         __be32 *p;
3125         int status = 0;
3126
3127         *res = 0;
3128         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3129                 return -EIO;
3130         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3131                 READ_BUF(8);
3132                 p = xdr_decode_hyper(p, res);
3133                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3134         }
3135         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3136         return status;
3137 }
3138
3139 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3140 {
3141         __be32 *p;
3142         int status = 0;
3143
3144         *res = 0;
3145         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3146                 return -EIO;
3147         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3148                 READ_BUF(8);
3149                 p = xdr_decode_hyper(p, res);
3150                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3151         }
3152         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3153         return status;
3154 }
3155
3156 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3157 {
3158         __be32 *p;
3159         int ret = 0;
3160
3161         *used = 0;
3162         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3163                 return -EIO;
3164         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3165                 READ_BUF(8);
3166                 p = xdr_decode_hyper(p, used);
3167                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3168                 ret = NFS_ATTR_FATTR_SPACE_USED;
3169         }
3170         dprintk("%s: space used=%Lu\n", __func__,
3171                         (unsigned long long)*used);
3172         return ret;
3173 }
3174
3175 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3176 {
3177         __be32 *p;
3178         uint64_t sec;
3179         uint32_t nsec;
3180
3181         READ_BUF(12);
3182         p = xdr_decode_hyper(p, &sec);
3183         nsec = be32_to_cpup(p++);
3184         time->tv_sec = (time_t)sec;
3185         time->tv_nsec = (long)nsec;
3186         return 0;
3187 }
3188
3189 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3190 {
3191         int status = 0;
3192
3193         time->tv_sec = 0;
3194         time->tv_nsec = 0;
3195         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3196                 return -EIO;
3197         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3198                 status = decode_attr_time(xdr, time);
3199                 if (status == 0)
3200                         status = NFS_ATTR_FATTR_ATIME;
3201                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3202         }
3203         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3204         return status;
3205 }
3206
3207 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3208 {
3209         int status = 0;
3210
3211         time->tv_sec = 0;
3212         time->tv_nsec = 0;
3213         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3214                 return -EIO;
3215         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3216                 status = decode_attr_time(xdr, time);
3217                 if (status == 0)
3218                         status = NFS_ATTR_FATTR_CTIME;
3219                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3220         }
3221         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3222         return status;
3223 }
3224
3225 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3226 {
3227         int status = 0;
3228
3229         time->tv_sec = 0;
3230         time->tv_nsec = 0;
3231         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3232                 return -EIO;
3233         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3234                 status = decode_attr_time(xdr, time);
3235                 if (status == 0)
3236                         status = NFS_ATTR_FATTR_MTIME;
3237                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3238         }
3239         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3240         return status;
3241 }
3242
3243 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3244 {
3245         unsigned int attrwords = XDR_QUADLEN(attrlen);
3246         unsigned int nwords = xdr->p - savep;
3247
3248         if (unlikely(attrwords != nwords)) {
3249                 dprintk("%s: server returned incorrect attribute length: "
3250                         "%u %c %u\n",
3251                                 __func__,
3252                                 attrwords << 2,
3253                                 (attrwords < nwords) ? '<' : '>',
3254                                 nwords << 2);
3255                 return -EIO;
3256         }
3257         return 0;
3258 }
3259
3260 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3261 {
3262         __be32 *p;
3263
3264         READ_BUF(20);
3265         cinfo->atomic = be32_to_cpup(p++);
3266         p = xdr_decode_hyper(p, &cinfo->before);
3267         p = xdr_decode_hyper(p, &cinfo->after);
3268         return 0;
3269 }
3270
3271 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3272 {
3273         __be32 *p;
3274         uint32_t supp, acc;
3275         int status;
3276
3277         status = decode_op_hdr(xdr, OP_ACCESS);
3278         if (status)
3279                 return status;
3280         READ_BUF(8);
3281         supp = be32_to_cpup(p++);
3282         acc = be32_to_cpup(p++);
3283         access->supported = supp;
3284         access->access = acc;
3285         return 0;
3286 }
3287
3288 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3289 {
3290         __be32 *p;
3291
3292         p = xdr_inline_decode(xdr, len);
3293         if (likely(p)) {
3294                 memcpy(buf, p, len);
3295                 return 0;
3296         }
3297         print_overflow_msg(__func__, xdr);
3298         return -EIO;
3299 }
3300
3301 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3302 {
3303         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3304 }
3305
3306 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3307 {
3308         int status;
3309
3310         status = decode_op_hdr(xdr, OP_CLOSE);
3311         if (status != -EIO)
3312                 nfs_increment_open_seqid(status, res->seqid);
3313         if (!status)
3314                 status = decode_stateid(xdr, &res->stateid);
3315         return status;
3316 }
3317
3318 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3319 {
3320         return decode_opaque_fixed(xdr, verifier, 8);
3321 }
3322
3323 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3324 {
3325         int status;
3326
3327         status = decode_op_hdr(xdr, OP_COMMIT);
3328         if (!status)
3329                 status = decode_verifier(xdr, res->verf->verifier);
3330         return status;
3331 }
3332
3333 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3334 {
3335         __be32 *p;
3336         uint32_t bmlen;
3337         int status;
3338
3339         status = decode_op_hdr(xdr, OP_CREATE);
3340         if (status)
3341                 return status;
3342         if ((status = decode_change_info(xdr, cinfo)))
3343                 return status;
3344         READ_BUF(4);
3345         bmlen = be32_to_cpup(p++);
3346         READ_BUF(bmlen << 2);
3347         return 0;
3348 }
3349
3350 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3351 {
3352         __be32 *savep;
3353         uint32_t attrlen, bitmap[2] = {0};
3354         int status;
3355
3356         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3357                 goto xdr_error;
3358         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3359                 goto xdr_error;
3360         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3361                 goto xdr_error;
3362         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3363                 goto xdr_error;
3364         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3365                 goto xdr_error;
3366         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3367                 goto xdr_error;
3368         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3369                 goto xdr_error;
3370         status = verify_attr_len(xdr, savep, attrlen);
3371 xdr_error:
3372         dprintk("%s: xdr returned %d!\n", __func__, -status);
3373         return status;
3374 }
3375
3376 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3377 {
3378         __be32 *savep;
3379         uint32_t attrlen, bitmap[2] = {0};
3380         int status;
3381
3382         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3383                 goto xdr_error;
3384         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3385                 goto xdr_error;
3386         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3387                 goto xdr_error;
3388
3389         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3390                 goto xdr_error;
3391         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3392                 goto xdr_error;
3393         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3394                 goto xdr_error;
3395         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3396                 goto xdr_error;
3397         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3398                 goto xdr_error;
3399         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3400                 goto xdr_error;
3401
3402         status = verify_attr_len(xdr, savep, attrlen);
3403 xdr_error:
3404         dprintk("%s: xdr returned %d!\n", __func__, -status);
3405         return status;
3406 }
3407
3408 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3409 {
3410         __be32 *savep;
3411         uint32_t attrlen, bitmap[2] = {0};
3412         int status;
3413
3414         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3415                 goto xdr_error;
3416         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3417                 goto xdr_error;
3418         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3419                 goto xdr_error;
3420
3421         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3422                 goto xdr_error;
3423         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3424                 goto xdr_error;
3425
3426         status = verify_attr_len(xdr, savep, attrlen);
3427 xdr_error:
3428         dprintk("%s: xdr returned %d!\n", __func__, -status);
3429         return status;
3430 }
3431
3432 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3433 {
3434         __be32 *savep;
3435         uint32_t attrlen,
3436                  bitmap[2] = {0},
3437                  type;
3438         int status;
3439         umode_t fmode = 0;
3440         uint64_t fileid;
3441
3442         status = decode_op_hdr(xdr, OP_GETATTR);
3443         if (status < 0)
3444                 goto xdr_error;
3445
3446         status = decode_attr_bitmap(xdr, bitmap);
3447         if (status < 0)
3448                 goto xdr_error;
3449
3450         status = decode_attr_length(xdr, &attrlen, &savep);
3451         if (status < 0)
3452                 goto xdr_error;
3453
3454
3455         status = decode_attr_type(xdr, bitmap, &type);
3456         if (status < 0)
3457                 goto xdr_error;
3458         fattr->mode = 0;
3459         if (status != 0) {
3460                 fattr->mode |= nfs_type2fmt[type];
3461                 fattr->valid |= status;
3462         }
3463
3464         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3465         if (status < 0)
3466                 goto xdr_error;
3467         fattr->valid |= status;
3468
3469         status = decode_attr_size(xdr, bitmap, &fattr->size);
3470         if (status < 0)
3471                 goto xdr_error;
3472         fattr->valid |= status;
3473
3474         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3475         if (status < 0)
3476                 goto xdr_error;
3477         fattr->valid |= status;
3478
3479         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3480         if (status < 0)
3481                 goto xdr_error;
3482         fattr->valid |= status;
3483
3484         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3485                                                 struct nfs4_fs_locations,
3486                                                 fattr));
3487         if (status < 0)
3488                 goto xdr_error;
3489         fattr->valid |= status;
3490
3491         status = decode_attr_mode(xdr, bitmap, &fmode);
3492         if (status < 0)
3493                 goto xdr_error;
3494         if (status != 0) {
3495                 fattr->mode |= fmode;
3496                 fattr->valid |= status;
3497         }
3498
3499         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3500         if (status < 0)
3501                 goto xdr_error;
3502         fattr->valid |= status;
3503
3504         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3505         if (status < 0)
3506                 goto xdr_error;
3507         fattr->valid |= status;
3508
3509         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3510         if (status < 0)
3511                 goto xdr_error;
3512         fattr->valid |= status;
3513
3514         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3515         if (status < 0)
3516                 goto xdr_error;
3517         fattr->valid |= status;
3518
3519         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3520         if (status < 0)
3521                 goto xdr_error;
3522         fattr->valid |= status;
3523
3524         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3525         if (status < 0)
3526                 goto xdr_error;
3527         fattr->valid |= status;
3528
3529         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3530         if (status < 0)
3531                 goto xdr_error;
3532         fattr->valid |= status;
3533
3534         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3535         if (status < 0)
3536                 goto xdr_error;
3537         fattr->valid |= status;
3538
3539         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3540         if (status < 0)
3541                 goto xdr_error;
3542         if (status != 0 && !(fattr->valid & status)) {
3543                 fattr->fileid = fileid;
3544                 fattr->valid |= status;
3545         }
3546
3547         status = verify_attr_len(xdr, savep, attrlen);
3548 xdr_error:
3549         dprintk("%s: xdr returned %d\n", __func__, -status);
3550         return status;
3551 }
3552
3553
3554 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3555 {
3556         __be32 *savep;
3557         uint32_t attrlen, bitmap[2];
3558         int status;
3559
3560         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3561                 goto xdr_error;
3562         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3563                 goto xdr_error;
3564         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3565                 goto xdr_error;
3566
3567         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3568
3569         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3570                 goto xdr_error;
3571         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3572                 goto xdr_error;
3573         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3574                 goto xdr_error;
3575         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3576         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3577                 goto xdr_error;
3578         fsinfo->wtpref = fsinfo->wtmax;
3579
3580         status = verify_attr_len(xdr, savep, attrlen);
3581 xdr_error:
3582         dprintk("%s: xdr returned %d!\n", __func__, -status);
3583         return status;
3584 }
3585
3586 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3587 {
3588         __be32 *p;
3589         uint32_t len;
3590         int status;
3591
3592         /* Zero handle first to allow comparisons */
3593         memset(fh, 0, sizeof(*fh));
3594
3595         status = decode_op_hdr(xdr, OP_GETFH);
3596         if (status)
3597                 return status;
3598
3599         READ_BUF(4);
3600         len = be32_to_cpup(p++);
3601         if (len > NFS4_FHSIZE)
3602                 return -EIO;
3603         fh->size = len;
3604         READ_BUF(len);
3605         memcpy(fh->data, p, len);
3606         return 0;
3607 }
3608
3609 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3610 {
3611         int status;
3612
3613         status = decode_op_hdr(xdr, OP_LINK);
3614         if (status)
3615                 return status;
3616         return decode_change_info(xdr, cinfo);
3617 }
3618
3619 /*
3620  * We create the owner, so we know a proper owner.id length is 4.
3621  */
3622 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3623 {
3624         uint64_t offset, length, clientid;
3625         __be32 *p;
3626         uint32_t namelen, type;
3627
3628         READ_BUF(32);
3629         p = xdr_decode_hyper(p, &offset);
3630         p = xdr_decode_hyper(p, &length);
3631         type = be32_to_cpup(p++);
3632         if (fl != NULL) {
3633                 fl->fl_start = (loff_t)offset;
3634                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3635                 if (length == ~(uint64_t)0)
3636                         fl->fl_end = OFFSET_MAX;
3637                 fl->fl_type = F_WRLCK;
3638                 if (type & 1)
3639                         fl->fl_type = F_RDLCK;
3640                 fl->fl_pid = 0;
3641         }
3642         p = xdr_decode_hyper(p, &clientid);
3643         namelen = be32_to_cpup(p++);
3644         READ_BUF(namelen);
3645         return -NFS4ERR_DENIED;
3646 }
3647
3648 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3649 {
3650         int status;
3651
3652         status = decode_op_hdr(xdr, OP_LOCK);
3653         if (status == -EIO)
3654                 goto out;
3655         if (status == 0) {
3656                 status = decode_stateid(xdr, &res->stateid);
3657                 if (unlikely(status))
3658                         goto out;
3659         } else if (status == -NFS4ERR_DENIED)
3660                 status = decode_lock_denied(xdr, NULL);
3661         if (res->open_seqid != NULL)
3662                 nfs_increment_open_seqid(status, res->open_seqid);
3663         nfs_increment_lock_seqid(status, res->lock_seqid);
3664 out:
3665         return status;
3666 }
3667
3668 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3669 {
3670         int status;
3671         status = decode_op_hdr(xdr, OP_LOCKT);
3672         if (status == -NFS4ERR_DENIED)
3673                 return decode_lock_denied(xdr, res->denied);
3674         return status;
3675 }
3676
3677 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3678 {
3679         int status;
3680
3681         status = decode_op_hdr(xdr, OP_LOCKU);
3682         if (status != -EIO)
3683                 nfs_increment_lock_seqid(status, res->seqid);
3684         if (status == 0)
3685                 status = decode_stateid(xdr, &res->stateid);
3686         return status;
3687 }
3688
3689 static int decode_lookup(struct xdr_stream *xdr)
3690 {
3691         return decode_op_hdr(xdr, OP_LOOKUP);
3692 }
3693
3694 /* This is too sick! */
3695 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3696 {
3697         __be32 *p;
3698         uint32_t limit_type, nblocks, blocksize;
3699
3700         READ_BUF(12);
3701         limit_type = be32_to_cpup(p++);
3702         switch (limit_type) {
3703         case 1:
3704                 p = xdr_decode_hyper(p, maxsize);
3705                 break;
3706         case 2:
3707                 nblocks = be32_to_cpup(p++);
3708                 blocksize = be32_to_cpup(p++);
3709                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3710         }
3711         return 0;
3712 }
3713
3714 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3715 {
3716         __be32 *p;
3717         uint32_t delegation_type;
3718         int status;
3719
3720         READ_BUF(4);
3721         delegation_type = be32_to_cpup(p++);
3722         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3723                 res->delegation_type = 0;
3724                 return 0;
3725         }
3726         status = decode_stateid(xdr, &res->delegation);
3727         if (unlikely(status))
3728                 return status;
3729         READ_BUF(4);
3730         res->do_recall = be32_to_cpup(p++);
3731
3732         switch (delegation_type) {
3733         case NFS4_OPEN_DELEGATE_READ:
3734                 res->delegation_type = FMODE_READ;
3735                 break;
3736         case NFS4_OPEN_DELEGATE_WRITE:
3737                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3738                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3739                                 return -EIO;
3740         }
3741         return decode_ace(xdr, NULL, res->server->nfs_client);
3742 }
3743
3744 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3745 {
3746         __be32 *p;
3747         uint32_t savewords, bmlen, i;
3748         int status;
3749
3750         status = decode_op_hdr(xdr, OP_OPEN);
3751         if (status != -EIO)
3752                 nfs_increment_open_seqid(status, res->seqid);
3753         if (!status)
3754                 status = decode_stateid(xdr, &res->stateid);
3755         if (unlikely(status))
3756                 return status;
3757
3758         decode_change_info(xdr, &res->cinfo);
3759
3760         READ_BUF(8);
3761         res->rflags = be32_to_cpup(p++);
3762         bmlen = be32_to_cpup(p++);
3763         if (bmlen > 10)
3764                 goto xdr_error;
3765
3766         READ_BUF(bmlen << 2);
3767         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3768         for (i = 0; i < savewords; ++i)
3769                 res->attrset[i] = be32_to_cpup(p++);
3770         for (; i < NFS4_BITMAP_SIZE; i++)
3771                 res->attrset[i] = 0;
3772
3773         return decode_delegation(xdr, res);
3774 xdr_error:
3775         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3776         return -EIO;
3777 }
3778
3779 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3780 {
3781         int status;
3782
3783         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3784         if (status != -EIO)
3785                 nfs_increment_open_seqid(status, res->seqid);
3786         if (!status)
3787                 status = decode_stateid(xdr, &res->stateid);
3788         return status;
3789 }
3790
3791 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3792 {
3793         int status;
3794
3795         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3796         if (status != -EIO)
3797                 nfs_increment_open_seqid(status, res->seqid);
3798         if (!status)
3799                 status = decode_stateid(xdr, &res->stateid);
3800         return status;
3801 }
3802
3803 static int decode_putfh(struct xdr_stream *xdr)
3804 {
3805         return decode_op_hdr(xdr, OP_PUTFH);
3806 }
3807
3808 static int decode_putrootfh(struct xdr_stream *xdr)
3809 {
3810         return decode_op_hdr(xdr, OP_PUTROOTFH);
3811 }
3812
3813 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3814 {
3815         struct kvec *iov = req->rq_rcv_buf.head;
3816         __be32 *p;
3817         uint32_t count, eof, recvd, hdrlen;
3818         int status;
3819
3820         status = decode_op_hdr(xdr, OP_READ);
3821         if (status)
3822                 return status;
3823         READ_BUF(8);
3824         eof = be32_to_cpup(p++);
3825         count = be32_to_cpup(p++);
3826         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3827         recvd = req->rq_rcv_buf.len - hdrlen;
3828         if (count > recvd) {
3829                 dprintk("NFS: server cheating in read reply: "
3830                                 "count %u > recvd %u\n", count, recvd);
3831                 count = recvd;
3832                 eof = 0;
3833         }
3834         xdr_read_pages(xdr, count);
3835         res->eof = eof;
3836         res->count = count;
3837         return 0;
3838 }
3839
3840 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3841 {
3842         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3843         struct page     *page = *rcvbuf->pages;
3844         struct kvec     *iov = rcvbuf->head;
3845         size_t          hdrlen;
3846         u32             recvd, pglen = rcvbuf->page_len;
3847         __be32          *end, *entry, *p, *kaddr;
3848         unsigned int    nr = 0;
3849         int             status;
3850
3851         status = decode_op_hdr(xdr, OP_READDIR);
3852         if (!status)
3853                 status = decode_verifier(xdr, readdir->verifier.data);
3854         if (unlikely(status))
3855                 return status;
3856         dprintk("%s: verifier = %08x:%08x\n",
3857                         __func__,
3858                         ((u32 *)readdir->verifier.data)[0],
3859                         ((u32 *)readdir->verifier.data)[1]);
3860
3861
3862         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3863         recvd = rcvbuf->len - hdrlen;
3864         if (pglen > recvd)
3865                 pglen = recvd;
3866         xdr_read_pages(xdr, pglen);
3867
3868         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3869         kaddr = p = kmap_atomic(page, KM_USER0);
3870         end = p + ((pglen + readdir->pgbase) >> 2);
3871         entry = p;
3872
3873         /* Make sure the packet actually has a value_follows and EOF entry */
3874         if ((entry + 1) > end)
3875                 goto short_pkt;
3876
3877         for (; *p++; nr++) {
3878                 u32 len, attrlen, xlen;
3879                 if (end - p < 3)
3880                         goto short_pkt;
3881                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3882                 p += 2;                 /* cookie */
3883                 len = ntohl(*p++);      /* filename length */
3884                 if (len > NFS4_MAXNAMLEN) {
3885                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3886                                         len);
3887                         goto err_unmap;
3888                 }
3889                 xlen = XDR_QUADLEN(len);
3890                 if (end - p < xlen + 1)
3891                         goto short_pkt;
3892                 dprintk("filename = %*s\n", len, (char *)p);
3893                 p += xlen;
3894                 len = ntohl(*p++);      /* bitmap length */
3895                 if (end - p < len + 1)
3896                         goto short_pkt;
3897                 p += len;
3898                 attrlen = XDR_QUADLEN(ntohl(*p++));
3899                 if (end - p < attrlen + 2)
3900                         goto short_pkt;
3901                 p += attrlen;           /* attributes */
3902                 entry = p;
3903         }
3904         /*
3905          * Apparently some server sends responses that are a valid size, but
3906          * contain no entries, and have value_follows==0 and EOF==0. For
3907          * those, just set the EOF marker.
3908          */
3909         if (!nr && entry[1] == 0) {
3910                 dprintk("NFS: readdir reply truncated!\n");
3911                 entry[1] = 1;
3912         }
3913 out:
3914         kunmap_atomic(kaddr, KM_USER0);
3915         return 0;
3916 short_pkt:
3917         /*
3918          * When we get a short packet there are 2 possibilities. We can
3919          * return an error, or fix up the response to look like a valid
3920          * response and return what we have so far. If there are no
3921          * entries and the packet was short, then return -EIO. If there
3922          * are valid entries in the response, return them and pretend that
3923          * the call was successful, but incomplete. The caller can retry the
3924          * readdir starting at the last cookie.
3925          */
3926         dprintk("%s: short packet at entry %d\n", __func__, nr);
3927         entry[0] = entry[1] = 0;
3928         if (nr)
3929                 goto out;
3930 err_unmap:
3931         kunmap_atomic(kaddr, KM_USER0);
3932         return -errno_NFSERR_IO;
3933 }
3934
3935 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3936 {
3937         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3938         struct kvec *iov = rcvbuf->head;
3939         size_t hdrlen;
3940         u32 len, recvd;
3941         __be32 *p;
3942         char *kaddr;
3943         int status;
3944
3945         status = decode_op_hdr(xdr, OP_READLINK);
3946         if (status)
3947                 return status;
3948
3949         /* Convert length of symlink */
3950         READ_BUF(4);
3951         len = be32_to_cpup(p++);
3952         if (len >= rcvbuf->page_len || len <= 0) {
3953                 dprintk("nfs: server returned giant symlink!\n");
3954                 return -ENAMETOOLONG;
3955         }
3956         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3957         recvd = req->rq_rcv_buf.len - hdrlen;
3958         if (recvd < len) {
3959                 dprintk("NFS: server cheating in readlink reply: "
3960                                 "count %u > recvd %u\n", len, recvd);
3961                 return -EIO;
3962         }
3963         xdr_read_pages(xdr, len);
3964         /*
3965          * The XDR encode routine has set things up so that
3966          * the link text will be copied directly into the
3967          * buffer.  We just have to do overflow-checking,
3968          * and and null-terminate the text (the VFS expects
3969          * null-termination).
3970          */
3971         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3972         kaddr[len+rcvbuf->page_base] = '\0';
3973         kunmap_atomic(kaddr, KM_USER0);
3974         return 0;
3975 }
3976
3977 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3978 {
3979         int status;
3980
3981         status = decode_op_hdr(xdr, OP_REMOVE);
3982         if (status)
3983                 goto out;
3984         status = decode_change_info(xdr, cinfo);
3985 out:
3986         return status;
3987 }
3988
3989 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3990               struct nfs4_change_info *new_cinfo)
3991 {
3992         int status;
3993
3994         status = decode_op_hdr(xdr, OP_RENAME);
3995         if (status)
3996                 goto out;
3997         if ((status = decode_change_info(xdr, old_cinfo)))
3998                 goto out;
3999         status = decode_change_info(xdr, new_cinfo);
4000 out:
4001         return status;
4002 }
4003
4004 static int decode_renew(struct xdr_stream *xdr)
4005 {
4006         return decode_op_hdr(xdr, OP_RENEW);
4007 }
4008
4009 static int
4010 decode_restorefh(struct xdr_stream *xdr)
4011 {
4012         return decode_op_hdr(xdr, OP_RESTOREFH);
4013 }
4014
4015 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4016                 size_t *acl_len)
4017 {
4018         __be32 *savep;
4019         uint32_t attrlen,
4020                  bitmap[2] = {0};
4021         struct kvec *iov = req->rq_rcv_buf.head;
4022         int status;
4023
4024         *acl_len = 0;
4025         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4026                 goto out;
4027         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4028                 goto out;
4029         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4030                 goto out;
4031
4032         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4033                 return -EIO;
4034         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4035                 size_t hdrlen;
4036                 u32 recvd;
4037
4038                 /* We ignore &savep and don't do consistency checks on
4039                  * the attr length.  Let userspace figure it out.... */
4040                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4041                 recvd = req->rq_rcv_buf.len - hdrlen;
4042                 if (attrlen > recvd) {
4043                         dprintk("NFS: server cheating in getattr"
4044                                         " acl reply: attrlen %u > recvd %u\n",
4045                                         attrlen, recvd);
4046                         return -EINVAL;
4047                 }
4048                 xdr_read_pages(xdr, attrlen);
4049                 *acl_len = attrlen;
4050         } else
4051                 status = -EOPNOTSUPP;
4052
4053 out:
4054         return status;
4055 }
4056
4057 static int
4058 decode_savefh(struct xdr_stream *xdr)
4059 {
4060         return decode_op_hdr(xdr, OP_SAVEFH);
4061 }
4062
4063 static int decode_setattr(struct xdr_stream *xdr)
4064 {
4065         __be32 *p;
4066         uint32_t bmlen;
4067         int status;
4068
4069         status = decode_op_hdr(xdr, OP_SETATTR);
4070         if (status)
4071                 return status;
4072         READ_BUF(4);
4073         bmlen = be32_to_cpup(p++);
4074         READ_BUF(bmlen << 2);
4075         return 0;
4076 }
4077
4078 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4079 {
4080         __be32 *p;
4081         uint32_t opnum;
4082         int32_t nfserr;
4083
4084         READ_BUF(8);
4085         opnum = be32_to_cpup(p++);
4086         if (opnum != OP_SETCLIENTID) {
4087                 dprintk("nfs: decode_setclientid: Server returned operation"
4088                         " %d\n", opnum);
4089                 return -EIO;
4090         }
4091         nfserr = be32_to_cpup(p++);
4092         if (nfserr == NFS_OK) {
4093                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4094                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4095                 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4096         } else if (nfserr == NFSERR_CLID_INUSE) {
4097                 uint32_t len;
4098
4099                 /* skip netid string */
4100                 READ_BUF(4);
4101                 len = be32_to_cpup(p++);
4102                 READ_BUF(len);
4103
4104                 /* skip uaddr string */
4105                 READ_BUF(4);
4106                 len = be32_to_cpup(p++);
4107                 READ_BUF(len);
4108                 return -NFSERR_CLID_INUSE;
4109         } else
4110                 return nfs4_stat_to_errno(nfserr);
4111
4112         return 0;
4113 }
4114
4115 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4116 {
4117         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4118 }
4119
4120 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4121 {
4122         __be32 *p;
4123         int status;
4124
4125         status = decode_op_hdr(xdr, OP_WRITE);
4126         if (status)
4127                 return status;
4128
4129         READ_BUF(16);
4130         res->count = be32_to_cpup(p++);
4131         res->verf->committed = be32_to_cpup(p++);
4132         memcpy(res->verf->verifier, p, 8);
4133         return 0;
4134 }
4135
4136 static int decode_delegreturn(struct xdr_stream *xdr)
4137 {
4138         return decode_op_hdr(xdr, OP_DELEGRETURN);
4139 }
4140
4141 #if defined(CONFIG_NFS_V4_1)
4142 static int decode_exchange_id(struct xdr_stream *xdr,
4143                               struct nfs41_exchange_id_res *res)
4144 {
4145         __be32 *p;
4146         uint32_t dummy;
4147         char *dummy_str;
4148         int status;
4149         struct nfs_client *clp = res->client;
4150
4151         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4152         if (status)
4153                 return status;
4154
4155         READ_BUF(8);
4156         p = xdr_decode_hyper(p, &clp->cl_ex_clid);
4157         READ_BUF(12);
4158         clp->cl_seqid = be32_to_cpup(p++);
4159         clp->cl_exchange_flags = be32_to_cpup(p++);
4160
4161         /* We ask for SP4_NONE */
4162         dummy = be32_to_cpup(p++);
4163         if (dummy != SP4_NONE)
4164                 return -EIO;
4165
4166         /* Throw away minor_id */
4167         READ_BUF(8);
4168
4169         /* Throw away Major id */
4170         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4171         if (unlikely(status))
4172                 return status;
4173
4174         /* Throw away server_scope */
4175         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4176         if (unlikely(status))
4177                 return status;
4178
4179         /* Throw away Implementation id array */
4180         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4181         if (unlikely(status))
4182                 return status;
4183
4184         return 0;
4185 }
4186
4187 static int decode_chan_attrs(struct xdr_stream *xdr,
4188                              struct nfs4_channel_attrs *attrs)
4189 {
4190         __be32 *p;
4191         u32 nr_attrs;
4192
4193         READ_BUF(28);
4194         attrs->headerpadsz = be32_to_cpup(p++);
4195         attrs->max_rqst_sz = be32_to_cpup(p++);
4196         attrs->max_resp_sz = be32_to_cpup(p++);
4197         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4198         attrs->max_ops = be32_to_cpup(p++);
4199         attrs->max_reqs = be32_to_cpup(p++);
4200         nr_attrs = be32_to_cpup(p++);
4201         if (unlikely(nr_attrs > 1)) {
4202                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4203                         __func__, nr_attrs);
4204                 return -EINVAL;
4205         }
4206         if (nr_attrs == 1)
4207                 READ_BUF(4); /* skip rdma_attrs */
4208         return 0;
4209 }
4210
4211 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4212 {
4213         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4214 }
4215
4216 static int decode_create_session(struct xdr_stream *xdr,
4217                                  struct nfs41_create_session_res *res)
4218 {
4219         __be32 *p;
4220         int status;
4221         struct nfs_client *clp = res->client;
4222         struct nfs4_session *session = clp->cl_session;
4223
4224         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4225         if (!status)
4226                 status = decode_sessionid(xdr, &session->sess_id);
4227         if (unlikely(status))
4228                 return status;
4229
4230         /* seqid, flags */
4231         READ_BUF(8);
4232         clp->cl_seqid = be32_to_cpup(p++);
4233         session->flags = be32_to_cpup(p++);
4234
4235         /* Channel attributes */
4236         status = decode_chan_attrs(xdr, &session->fc_attrs);
4237         if (!status)
4238                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4239         return status;
4240 }
4241
4242 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4243 {
4244         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4245 }
4246 #endif /* CONFIG_NFS_V4_1 */
4247
4248 static int decode_sequence(struct xdr_stream *xdr,
4249                            struct nfs4_sequence_res *res,
4250                            struct rpc_rqst *rqstp)
4251 {
4252 #if defined(CONFIG_NFS_V4_1)
4253         struct nfs4_slot *slot;
4254         struct nfs4_sessionid id;
4255         u32 dummy;
4256         int status;
4257         __be32 *p;
4258
4259         if (!res->sr_session)
4260                 return 0;
4261
4262         status = decode_op_hdr(xdr, OP_SEQUENCE);
4263         if (!status)
4264                 status = decode_sessionid(xdr, &id);
4265         if (unlikely(status))
4266                 goto out_err;
4267
4268         /*
4269          * If the server returns different values for sessionID, slotID or
4270          * sequence number, the server is looney tunes.
4271          */
4272         status = -ESERVERFAULT;
4273
4274         if (memcmp(id.data, res->sr_session->sess_id.data,
4275                    NFS4_MAX_SESSIONID_LEN)) {
4276                 dprintk("%s Invalid session id\n", __func__);
4277                 goto out_err;
4278         }
4279
4280         READ_BUF(20);
4281
4282         /* seqid */
4283         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4284         dummy = be32_to_cpup(p++);
4285         if (dummy != slot->seq_nr) {
4286                 dprintk("%s Invalid sequence number\n", __func__);
4287                 goto out_err;
4288         }
4289         /* slot id */
4290         dummy = be32_to_cpup(p++);
4291         if (dummy != res->sr_slotid) {
4292                 dprintk("%s Invalid slot id\n", __func__);
4293                 goto out_err;
4294         }
4295         /* highest slot id - currently not processed */
4296         dummy = be32_to_cpup(p++);
4297         /* target highest slot id - currently not processed */
4298         dummy = be32_to_cpup(p++);
4299         /* result flags - currently not processed */
4300         dummy = be32_to_cpup(p++);
4301         status = 0;
4302 out_err:
4303         res->sr_status = status;
4304         return status;
4305 #else  /* CONFIG_NFS_V4_1 */
4306         return 0;
4307 #endif /* CONFIG_NFS_V4_1 */
4308 }
4309
4310 /*
4311  * END OF "GENERIC" DECODE ROUTINES.
4312  */
4313
4314 /*
4315  * Decode OPEN_DOWNGRADE response
4316  */
4317 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4318 {
4319         struct xdr_stream xdr;
4320         struct compound_hdr hdr;
4321         int status;
4322
4323         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4324         status = decode_compound_hdr(&xdr, &hdr);
4325         if (status)
4326                 goto out;
4327         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4328         if (status)
4329                 goto out;
4330         status = decode_putfh(&xdr);
4331         if (status)
4332                 goto out;
4333         status = decode_open_downgrade(&xdr, res);
4334         if (status != 0)
4335                 goto out;
4336         decode_getfattr(&xdr, res->fattr, res->server);
4337 out:
4338         return status;
4339 }
4340
4341 /*
4342  * Decode ACCESS response
4343  */
4344 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4345 {
4346         struct xdr_stream xdr;
4347         struct compound_hdr hdr;
4348         int status;
4349
4350         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4351         status = decode_compound_hdr(&xdr, &hdr);
4352         if (status)
4353                 goto out;
4354         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4355         if (status)
4356                 goto out;
4357         status = decode_putfh(&xdr);
4358         if (status != 0)
4359                 goto out;
4360         status = decode_access(&xdr, res);
4361         if (status != 0)
4362                 goto out;
4363         decode_getfattr(&xdr, res->fattr, res->server);
4364 out:
4365         return status;
4366 }
4367
4368 /*
4369  * Decode LOOKUP response
4370  */
4371 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4372 {
4373         struct xdr_stream xdr;
4374         struct compound_hdr hdr;
4375         int status;
4376
4377         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4378         status = decode_compound_hdr(&xdr, &hdr);
4379         if (status)
4380                 goto out;
4381         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4382         if (status)
4383                 goto out;
4384         if ((status = decode_putfh(&xdr)) != 0)
4385                 goto out;
4386         if ((status = decode_lookup(&xdr)) != 0)
4387                 goto out;
4388         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4389                 goto out;
4390         status = decode_getfattr(&xdr, res->fattr, res->server);
4391 out:
4392         return status;
4393 }
4394
4395 /*
4396  * Decode LOOKUP_ROOT response
4397  */
4398 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4399 {
4400         struct xdr_stream xdr;
4401         struct compound_hdr hdr;
4402         int status;
4403
4404         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4405         status = decode_compound_hdr(&xdr, &hdr);
4406         if (status)
4407                 goto out;
4408         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4409         if (status)
4410                 goto out;
4411         if ((status = decode_putrootfh(&xdr)) != 0)
4412                 goto out;
4413         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4414                 status = decode_getfattr(&xdr, res->fattr, res->server);
4415 out:
4416         return status;
4417 }
4418
4419 /*
4420  * Decode REMOVE response
4421  */
4422 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4423 {
4424         struct xdr_stream xdr;
4425         struct compound_hdr hdr;
4426         int status;
4427
4428         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4429         status = decode_compound_hdr(&xdr, &hdr);
4430         if (status)
4431                 goto out;
4432         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4433         if (status)
4434                 goto out;
4435         if ((status = decode_putfh(&xdr)) != 0)
4436                 goto out;
4437         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4438                 goto out;
4439         decode_getfattr(&xdr, &res->dir_attr, res->server);
4440 out:
4441         return status;
4442 }
4443
4444 /*
4445  * Decode RENAME response
4446  */
4447 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_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_putfh(&xdr)) != 0)
4461                 goto out;
4462         if ((status = decode_savefh(&xdr)) != 0)
4463                 goto out;
4464         if ((status = decode_putfh(&xdr)) != 0)
4465                 goto out;
4466         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4467                 goto out;
4468         /* Current FH is target directory */
4469         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4470                 goto out;
4471         if ((status = decode_restorefh(&xdr)) != 0)
4472                 goto out;
4473         decode_getfattr(&xdr, res->old_fattr, res->server);
4474 out:
4475         return status;
4476 }
4477
4478 /*
4479  * Decode LINK response
4480  */
4481 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4482 {
4483         struct xdr_stream xdr;
4484         struct compound_hdr hdr;
4485         int status;
4486
4487         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4488         status = decode_compound_hdr(&xdr, &hdr);
4489         if (status)
4490                 goto out;
4491         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4492         if (status)
4493                 goto out;
4494         if ((status = decode_putfh(&xdr)) != 0)
4495                 goto out;
4496         if ((status = decode_savefh(&xdr)) != 0)
4497                 goto out;
4498         if ((status = decode_putfh(&xdr)) != 0)
4499                 goto out;
4500         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4501                 goto out;
4502         /*
4503          * Note order: OP_LINK leaves the directory as the current
4504          *             filehandle.
4505          */
4506         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4507                 goto out;
4508         if ((status = decode_restorefh(&xdr)) != 0)
4509                 goto out;
4510         decode_getfattr(&xdr, res->fattr, res->server);
4511 out:
4512         return status;
4513 }
4514
4515 /*
4516  * Decode CREATE response
4517  */
4518 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4519 {
4520         struct xdr_stream xdr;
4521         struct compound_hdr hdr;
4522         int status;
4523
4524         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4525         status = decode_compound_hdr(&xdr, &hdr);
4526         if (status)
4527                 goto out;
4528         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4529         if (status)
4530                 goto out;
4531         if ((status = decode_putfh(&xdr)) != 0)
4532                 goto out;
4533         if ((status = decode_savefh(&xdr)) != 0)
4534                 goto out;
4535         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4536                 goto out;
4537         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4538                 goto out;
4539         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4540                 goto out;
4541         if ((status = decode_restorefh(&xdr)) != 0)
4542                 goto out;
4543         decode_getfattr(&xdr, res->dir_fattr, res->server);
4544 out:
4545         return status;
4546 }
4547
4548 /*
4549  * Decode SYMLINK response
4550  */
4551 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4552 {
4553         return nfs4_xdr_dec_create(rqstp, p, res);
4554 }
4555
4556 /*
4557  * Decode GETATTR response
4558  */
4559 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4560 {
4561         struct xdr_stream xdr;
4562         struct compound_hdr hdr;
4563         int status;
4564
4565         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4566         status = decode_compound_hdr(&xdr, &hdr);
4567         if (status)
4568                 goto out;
4569         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4570         if (status)
4571                 goto out;
4572         status = decode_putfh(&xdr);
4573         if (status)
4574                 goto out;
4575         status = decode_getfattr(&xdr, res->fattr, res->server);
4576 out:
4577         return status;
4578 }
4579
4580 /*
4581  * Encode an SETACL request
4582  */
4583 static int
4584 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4585 {
4586         struct xdr_stream xdr;
4587         struct compound_hdr hdr = {
4588                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4589         };
4590         int status;
4591
4592         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4593         encode_compound_hdr(&xdr, req, &hdr);
4594         encode_sequence(&xdr, &args->seq_args, &hdr);
4595         encode_putfh(&xdr, args->fh, &hdr);
4596         status = encode_setacl(&xdr, args, &hdr);
4597         encode_nops(&hdr);
4598         return status;
4599 }
4600
4601 /*
4602  * Decode SETACL response
4603  */
4604 static int
4605 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4606                     struct nfs_setaclres *res)
4607 {
4608         struct xdr_stream xdr;
4609         struct compound_hdr hdr;
4610         int status;
4611
4612         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4613         status = decode_compound_hdr(&xdr, &hdr);
4614         if (status)
4615                 goto out;
4616         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4617         if (status)
4618                 goto out;
4619         status = decode_putfh(&xdr);
4620         if (status)
4621                 goto out;
4622         status = decode_setattr(&xdr);
4623 out:
4624         return status;
4625 }
4626
4627 /*
4628  * Decode GETACL response
4629  */
4630 static int
4631 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4632                     struct nfs_getaclres *res)
4633 {
4634         struct xdr_stream xdr;
4635         struct compound_hdr hdr;
4636         int status;
4637
4638         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4639         status = decode_compound_hdr(&xdr, &hdr);
4640         if (status)
4641                 goto out;
4642         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4643         if (status)
4644                 goto out;
4645         status = decode_putfh(&xdr);
4646         if (status)
4647                 goto out;
4648         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4649
4650 out:
4651         return status;
4652 }
4653
4654 /*
4655  * Decode CLOSE response
4656  */
4657 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4658 {
4659         struct xdr_stream xdr;
4660         struct compound_hdr hdr;
4661         int status;
4662
4663         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4664         status = decode_compound_hdr(&xdr, &hdr);
4665         if (status)
4666                 goto out;
4667         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4668         if (status)
4669                 goto out;
4670         status = decode_putfh(&xdr);
4671         if (status)
4672                 goto out;
4673         status = decode_close(&xdr, res);
4674         if (status != 0)
4675                 goto out;
4676         /*
4677          * Note: Server may do delete on close for this file
4678          *      in which case the getattr call will fail with
4679          *      an ESTALE error. Shouldn't be a problem,
4680          *      though, since fattr->valid will remain unset.
4681          */
4682         decode_getfattr(&xdr, res->fattr, res->server);
4683 out:
4684         return status;
4685 }
4686
4687 /*
4688  * Decode OPEN response
4689  */
4690 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *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_savefh(&xdr);
4707         if (status)
4708                 goto out;
4709         status = decode_open(&xdr, res);
4710         if (status)
4711                 goto out;
4712         if (decode_getfh(&xdr, &res->fh) != 0)
4713                 goto out;
4714         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4715                 goto out;
4716         if (decode_restorefh(&xdr) != 0)
4717                 goto out;
4718         decode_getfattr(&xdr, res->dir_attr, res->server);
4719 out:
4720         return status;
4721 }
4722
4723 /*
4724  * Decode OPEN_CONFIRM response
4725  */
4726 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4727 {
4728         struct xdr_stream xdr;
4729         struct compound_hdr hdr;
4730         int status;
4731
4732         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4733         status = decode_compound_hdr(&xdr, &hdr);
4734         if (status)
4735                 goto out;
4736         status = decode_putfh(&xdr);
4737         if (status)
4738                 goto out;
4739         status = decode_open_confirm(&xdr, res);
4740 out:
4741         return status;
4742 }
4743
4744 /*
4745  * Decode OPEN response
4746  */
4747 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4748 {
4749         struct xdr_stream xdr;
4750         struct compound_hdr hdr;
4751         int status;
4752
4753         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4754         status = decode_compound_hdr(&xdr, &hdr);
4755         if (status)
4756                 goto out;
4757         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4758         if (status)
4759                 goto out;
4760         status = decode_putfh(&xdr);
4761         if (status)
4762                 goto out;
4763         status = decode_open(&xdr, res);
4764         if (status)
4765                 goto out;
4766         decode_getfattr(&xdr, res->f_attr, res->server);
4767 out:
4768         return status;
4769 }
4770
4771 /*
4772  * Decode SETATTR response
4773  */
4774 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4775 {
4776         struct xdr_stream xdr;
4777         struct compound_hdr hdr;
4778         int status;
4779
4780         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4781         status = decode_compound_hdr(&xdr, &hdr);
4782         if (status)
4783                 goto out;
4784         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4785         if (status)
4786                 goto out;
4787         status = decode_putfh(&xdr);
4788         if (status)
4789                 goto out;
4790         status = decode_setattr(&xdr);
4791         if (status)
4792                 goto out;
4793         decode_getfattr(&xdr, res->fattr, res->server);
4794 out:
4795         return status;
4796 }
4797
4798 /*
4799  * Decode LOCK response
4800  */
4801 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4802 {
4803         struct xdr_stream xdr;
4804         struct compound_hdr hdr;
4805         int status;
4806
4807         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4808         status = decode_compound_hdr(&xdr, &hdr);
4809         if (status)
4810                 goto out;
4811         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4812         if (status)
4813                 goto out;
4814         status = decode_putfh(&xdr);
4815         if (status)
4816                 goto out;
4817         status = decode_lock(&xdr, res);
4818 out:
4819         return status;
4820 }
4821
4822 /*
4823  * Decode LOCKT response
4824  */
4825 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4826 {
4827         struct xdr_stream xdr;
4828         struct compound_hdr hdr;
4829         int status;
4830
4831         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4832         status = decode_compound_hdr(&xdr, &hdr);
4833         if (status)
4834                 goto out;
4835         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4836         if (status)
4837                 goto out;
4838         status = decode_putfh(&xdr);
4839         if (status)
4840                 goto out;
4841         status = decode_lockt(&xdr, res);
4842 out:
4843         return status;
4844 }
4845
4846 /*
4847  * Decode LOCKU response
4848  */
4849 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4850 {
4851         struct xdr_stream xdr;
4852         struct compound_hdr hdr;
4853         int status;
4854
4855         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4856         status = decode_compound_hdr(&xdr, &hdr);
4857         if (status)
4858                 goto out;
4859         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4860         if (status)
4861                 goto out;
4862         status = decode_putfh(&xdr);
4863         if (status)
4864                 goto out;
4865         status = decode_locku(&xdr, res);
4866 out:
4867         return status;
4868 }
4869
4870 /*
4871  * Decode READLINK response
4872  */
4873 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4874                                  struct nfs4_readlink_res *res)
4875 {
4876         struct xdr_stream xdr;
4877         struct compound_hdr hdr;
4878         int status;
4879
4880         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4881         status = decode_compound_hdr(&xdr, &hdr);
4882         if (status)
4883                 goto out;
4884         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4885         if (status)
4886                 goto out;
4887         status = decode_putfh(&xdr);
4888         if (status)
4889                 goto out;
4890         status = decode_readlink(&xdr, rqstp);
4891 out:
4892         return status;
4893 }
4894
4895 /*
4896  * Decode READDIR response
4897  */
4898 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4899 {
4900         struct xdr_stream xdr;
4901         struct compound_hdr hdr;
4902         int status;
4903
4904         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4905         status = decode_compound_hdr(&xdr, &hdr);
4906         if (status)
4907                 goto out;
4908         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4909         if (status)
4910                 goto out;
4911         status = decode_putfh(&xdr);
4912         if (status)
4913                 goto out;
4914         status = decode_readdir(&xdr, rqstp, res);
4915 out:
4916         return status;
4917 }
4918
4919 /*
4920  * Decode Read response
4921  */
4922 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4923 {
4924         struct xdr_stream xdr;
4925         struct compound_hdr hdr;
4926         int status;
4927
4928         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4929         status = decode_compound_hdr(&xdr, &hdr);
4930         if (status)
4931                 goto out;
4932         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4933         if (status)
4934                 goto out;
4935         status = decode_putfh(&xdr);
4936         if (status)
4937                 goto out;
4938         status = decode_read(&xdr, rqstp, res);
4939         if (!status)
4940                 status = res->count;
4941 out:
4942         return status;
4943 }
4944
4945 /*
4946  * Decode WRITE response
4947  */
4948 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4949 {
4950         struct xdr_stream xdr;
4951         struct compound_hdr hdr;
4952         int status;
4953
4954         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4955         status = decode_compound_hdr(&xdr, &hdr);
4956         if (status)
4957                 goto out;
4958         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4959         if (status)
4960                 goto out;
4961         status = decode_putfh(&xdr);
4962         if (status)
4963                 goto out;
4964         status = decode_write(&xdr, res);
4965         if (status)
4966                 goto out;
4967         decode_getfattr(&xdr, res->fattr, res->server);
4968         if (!status)
4969                 status = res->count;
4970 out:
4971         return status;
4972 }
4973
4974 /*
4975  * Decode COMMIT response
4976  */
4977 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4978 {
4979         struct xdr_stream xdr;
4980         struct compound_hdr hdr;
4981         int status;
4982
4983         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4984         status = decode_compound_hdr(&xdr, &hdr);
4985         if (status)
4986                 goto out;
4987         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4988         if (status)
4989                 goto out;
4990         status = decode_putfh(&xdr);
4991         if (status)
4992                 goto out;
4993         status = decode_commit(&xdr, res);
4994         if (status)
4995                 goto out;
4996         decode_getfattr(&xdr, res->fattr, res->server);
4997 out:
4998         return status;
4999 }
5000
5001 /*
5002  * FSINFO request
5003  */
5004 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5005                                struct nfs4_fsinfo_res *res)
5006 {
5007         struct xdr_stream xdr;
5008         struct compound_hdr hdr;
5009         int status;
5010
5011         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5012         status = decode_compound_hdr(&xdr, &hdr);
5013         if (!status)
5014                 status = decode_sequence(&xdr, &res->seq_res, req);
5015         if (!status)
5016                 status = decode_putfh(&xdr);
5017         if (!status)
5018                 status = decode_fsinfo(&xdr, res->fsinfo);
5019         return status;
5020 }
5021
5022 /*
5023  * PATHCONF request
5024  */
5025 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5026                                  struct nfs4_pathconf_res *res)
5027 {
5028         struct xdr_stream xdr;
5029         struct compound_hdr hdr;
5030         int status;
5031
5032         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5033         status = decode_compound_hdr(&xdr, &hdr);
5034         if (!status)
5035                 status = decode_sequence(&xdr, &res->seq_res, req);
5036         if (!status)
5037                 status = decode_putfh(&xdr);
5038         if (!status)
5039                 status = decode_pathconf(&xdr, res->pathconf);
5040         return status;
5041 }
5042
5043 /*
5044  * STATFS request
5045  */
5046 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5047                                struct nfs4_statfs_res *res)
5048 {
5049         struct xdr_stream xdr;
5050         struct compound_hdr hdr;
5051         int status;
5052
5053         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5054         status = decode_compound_hdr(&xdr, &hdr);
5055         if (!status)
5056                 status = decode_sequence(&xdr, &res->seq_res, req);
5057         if (!status)
5058                 status = decode_putfh(&xdr);
5059         if (!status)
5060                 status = decode_statfs(&xdr, res->fsstat);
5061         return status;
5062 }
5063
5064 /*
5065  * GETATTR_BITMAP request
5066  */
5067 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5068 {
5069         struct xdr_stream xdr;
5070         struct compound_hdr hdr;
5071         int status;
5072
5073         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5074         status = decode_compound_hdr(&xdr, &hdr);
5075         if (status)
5076                 goto out;
5077         status = decode_sequence(&xdr, &res->seq_res, req);
5078         if (status)
5079                 goto out;
5080         if ((status = decode_putfh(&xdr)) != 0)
5081                 goto out;
5082         status = decode_server_caps(&xdr, res);
5083 out:
5084         return status;
5085 }
5086
5087 /*
5088  * Decode RENEW response
5089  */
5090 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5091 {
5092         struct xdr_stream xdr;
5093         struct compound_hdr hdr;
5094         int status;
5095
5096         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5097         status = decode_compound_hdr(&xdr, &hdr);
5098         if (!status)
5099                 status = decode_renew(&xdr);
5100         return status;
5101 }
5102
5103 /*
5104  * a SETCLIENTID request
5105  */
5106 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5107                 struct nfs_client *clp)
5108 {
5109         struct xdr_stream xdr;
5110         struct compound_hdr hdr;
5111         int status;
5112
5113         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5114         status = decode_compound_hdr(&xdr, &hdr);
5115         if (!status)
5116                 status = decode_setclientid(&xdr, clp);
5117         return status;
5118 }
5119
5120 /*
5121  * a SETCLIENTID_CONFIRM request
5122  */
5123 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5124 {
5125         struct xdr_stream xdr;
5126         struct compound_hdr hdr;
5127         int status;
5128
5129         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5130         status = decode_compound_hdr(&xdr, &hdr);
5131         if (!status)
5132                 status = decode_setclientid_confirm(&xdr);
5133         if (!status)
5134                 status = decode_putrootfh(&xdr);
5135         if (!status)
5136                 status = decode_fsinfo(&xdr, fsinfo);
5137         return status;
5138 }
5139
5140 /*
5141  * DELEGRETURN request
5142  */
5143 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5144 {
5145         struct xdr_stream xdr;
5146         struct compound_hdr hdr;
5147         int status;
5148
5149         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5150         status = decode_compound_hdr(&xdr, &hdr);
5151         if (status)
5152                 goto out;
5153         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5154         if (status)
5155                 goto out;
5156         status = decode_putfh(&xdr);
5157         if (status != 0)
5158                 goto out;
5159         status = decode_delegreturn(&xdr);
5160         decode_getfattr(&xdr, res->fattr, res->server);
5161 out:
5162         return status;
5163 }
5164
5165 /*
5166  * FS_LOCATIONS request
5167  */
5168 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5169                                      struct nfs4_fs_locations_res *res)
5170 {
5171         struct xdr_stream xdr;
5172         struct compound_hdr hdr;
5173         int status;
5174
5175         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5176         status = decode_compound_hdr(&xdr, &hdr);
5177         if (status)
5178                 goto out;
5179         status = decode_sequence(&xdr, &res->seq_res, req);
5180         if (status)
5181                 goto out;
5182         if ((status = decode_putfh(&xdr)) != 0)
5183                 goto out;
5184         if ((status = decode_lookup(&xdr)) != 0)
5185                 goto out;
5186         xdr_enter_page(&xdr, PAGE_SIZE);
5187         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5188                                  res->fs_locations->server);
5189 out:
5190         return status;
5191 }
5192
5193 #if defined(CONFIG_NFS_V4_1)
5194 /*
5195  * EXCHANGE_ID request
5196  */
5197 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5198                                     void *res)
5199 {
5200         struct xdr_stream xdr;
5201         struct compound_hdr hdr;
5202         int status;
5203
5204         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5205         status = decode_compound_hdr(&xdr, &hdr);
5206         if (!status)
5207                 status = decode_exchange_id(&xdr, res);
5208         return status;
5209 }
5210
5211 /*
5212  * a CREATE_SESSION request
5213  */
5214 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5215                                        struct nfs41_create_session_res *res)
5216 {
5217         struct xdr_stream xdr;
5218         struct compound_hdr hdr;
5219         int status;
5220
5221         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5222         status = decode_compound_hdr(&xdr, &hdr);
5223         if (!status)
5224                 status = decode_create_session(&xdr, res);
5225         return status;
5226 }
5227
5228 /*
5229  * a DESTROY_SESSION request
5230  */
5231 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5232                                         void *dummy)
5233 {
5234         struct xdr_stream xdr;
5235         struct compound_hdr hdr;
5236         int status;
5237
5238         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5239         status = decode_compound_hdr(&xdr, &hdr);
5240         if (!status)
5241                 status = decode_destroy_session(&xdr, dummy);
5242         return status;
5243 }
5244
5245 /*
5246  * a SEQUENCE request
5247  */
5248 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5249                                  struct nfs4_sequence_res *res)
5250 {
5251         struct xdr_stream xdr;
5252         struct compound_hdr hdr;
5253         int status;
5254
5255         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5256         status = decode_compound_hdr(&xdr, &hdr);
5257         if (!status)
5258                 status = decode_sequence(&xdr, res, rqstp);
5259         return status;
5260 }
5261
5262 /*
5263  * a GET_LEASE_TIME request
5264  */
5265 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5266                                        struct nfs4_get_lease_time_res *res)
5267 {
5268         struct xdr_stream xdr;
5269         struct compound_hdr hdr;
5270         int status;
5271
5272         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5273         status = decode_compound_hdr(&xdr, &hdr);
5274         if (!status)
5275                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5276         if (!status)
5277                 status = decode_putrootfh(&xdr);
5278         if (!status)
5279                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5280         return status;
5281 }
5282 #endif /* CONFIG_NFS_V4_1 */
5283
5284 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5285 {
5286         uint32_t bitmap[2] = {0};
5287         uint32_t len;
5288
5289         if (!*p++) {
5290                 if (!*p)
5291                         return ERR_PTR(-EAGAIN);
5292                 entry->eof = 1;
5293                 return ERR_PTR(-EBADCOOKIE);
5294         }
5295
5296         entry->prev_cookie = entry->cookie;
5297         p = xdr_decode_hyper(p, &entry->cookie);
5298         entry->len = ntohl(*p++);
5299         entry->name = (const char *) p;
5300         p += XDR_QUADLEN(entry->len);
5301
5302         /*
5303          * In case the server doesn't return an inode number,
5304          * we fake one here.  (We don't use inode number 0,
5305          * since glibc seems to choke on it...)
5306          */
5307         entry->ino = 1;
5308
5309         len = ntohl(*p++);              /* bitmap length */
5310         if (len-- > 0) {
5311                 bitmap[0] = ntohl(*p++);
5312                 if (len-- > 0) {
5313                         bitmap[1] = ntohl(*p++);
5314                         p += len;
5315                 }
5316         }
5317         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5318         if (len > 0) {
5319                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5320                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5321                         /* Ignore the return value of rdattr_error for now */
5322                         p++;
5323                         len--;
5324                 }
5325                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5326                         xdr_decode_hyper(p, &entry->ino);
5327                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5328                         xdr_decode_hyper(p, &entry->ino);
5329                 p += len;
5330         }
5331
5332         entry->eof = !p[0] && p[1];
5333         return p;
5334 }
5335
5336 /*
5337  * We need to translate between nfs status return values and
5338  * the local errno values which may not be the same.
5339  */
5340 static struct {
5341         int stat;
5342         int errno;
5343 } nfs_errtbl[] = {
5344         { NFS4_OK,              0               },
5345         { NFS4ERR_PERM,         -EPERM          },
5346         { NFS4ERR_NOENT,        -ENOENT         },
5347         { NFS4ERR_IO,           -errno_NFSERR_IO},
5348         { NFS4ERR_NXIO,         -ENXIO          },
5349         { NFS4ERR_ACCESS,       -EACCES         },
5350         { NFS4ERR_EXIST,        -EEXIST         },
5351         { NFS4ERR_XDEV,         -EXDEV          },
5352         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5353         { NFS4ERR_ISDIR,        -EISDIR         },
5354         { NFS4ERR_INVAL,        -EINVAL         },
5355         { NFS4ERR_FBIG,         -EFBIG          },
5356         { NFS4ERR_NOSPC,        -ENOSPC         },
5357         { NFS4ERR_ROFS,         -EROFS          },
5358         { NFS4ERR_MLINK,        -EMLINK         },
5359         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5360         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5361         { NFS4ERR_DQUOT,        -EDQUOT         },
5362         { NFS4ERR_STALE,        -ESTALE         },
5363         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5364         { NFS4ERR_BADOWNER,     -EINVAL         },
5365         { NFS4ERR_BADNAME,      -EINVAL         },
5366         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5367         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5368         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5369         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5370         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5371         { NFS4ERR_LOCKED,       -EAGAIN         },
5372         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5373         { NFS4ERR_SYMLINK,      -ELOOP          },
5374         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5375         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5376         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5377                                                     * to be handled by a
5378                                                     * middle-layer.
5379                                                     */
5380         { -1,                   -EIO            }
5381 };
5382
5383 /*
5384  * Convert an NFS error code to a local one.
5385  * This one is used jointly by NFSv2 and NFSv3.
5386  */
5387 static int
5388 nfs4_stat_to_errno(int stat)
5389 {
5390         int i;
5391         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5392                 if (nfs_errtbl[i].stat == stat)
5393                         return nfs_errtbl[i].errno;
5394         }
5395         if (stat <= 10000 || stat > 10100) {
5396                 /* The server is looney tunes. */
5397                 return -ESERVERFAULT;
5398         }
5399         /* If we cannot translate the error, the recovery routines should
5400          * handle it.
5401          * Note: remaining NFSv4 error codes have values > 10000, so should
5402          * not conflict with native Linux error codes.
5403          */
5404         return -stat;
5405 }
5406
5407 #define PROC(proc, argtype, restype)                            \
5408 [NFSPROC4_CLNT_##proc] = {                                      \
5409         .p_proc   = NFSPROC4_COMPOUND,                          \
5410         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5411         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5412         .p_arglen = NFS4_##argtype##_sz,                        \
5413         .p_replen = NFS4_##restype##_sz,                        \
5414         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5415         .p_name   = #proc,                                      \
5416 }
5417
5418 struct rpc_procinfo     nfs4_procedures[] = {
5419   PROC(READ,            enc_read,       dec_read),
5420   PROC(WRITE,           enc_write,      dec_write),
5421   PROC(COMMIT,          enc_commit,     dec_commit),
5422   PROC(OPEN,            enc_open,       dec_open),
5423   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5424   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5425   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5426   PROC(CLOSE,           enc_close,      dec_close),
5427   PROC(SETATTR,         enc_setattr,    dec_setattr),
5428   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5429   PROC(RENEW,           enc_renew,      dec_renew),
5430   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5431   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5432   PROC(LOCK,            enc_lock,       dec_lock),
5433   PROC(LOCKT,           enc_lockt,      dec_lockt),
5434   PROC(LOCKU,           enc_locku,      dec_locku),
5435   PROC(ACCESS,          enc_access,     dec_access),
5436   PROC(GETATTR,         enc_getattr,    dec_getattr),
5437   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5438   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5439   PROC(REMOVE,          enc_remove,     dec_remove),
5440   PROC(RENAME,          enc_rename,     dec_rename),
5441   PROC(LINK,            enc_link,       dec_link),
5442   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5443   PROC(CREATE,          enc_create,     dec_create),
5444   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5445   PROC(STATFS,          enc_statfs,     dec_statfs),
5446   PROC(READLINK,        enc_readlink,   dec_readlink),
5447   PROC(READDIR,         enc_readdir,    dec_readdir),
5448   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5449   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5450   PROC(GETACL,          enc_getacl,     dec_getacl),
5451   PROC(SETACL,          enc_setacl,     dec_setacl),
5452   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5453 #if defined(CONFIG_NFS_V4_1)
5454   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5455   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5456   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5457   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5458   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5459 #endif /* CONFIG_NFS_V4_1 */
5460 };
5461
5462 struct rpc_version              nfs_version4 = {
5463         .number                 = 4,
5464         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5465         .procs                  = nfs4_procedures
5466 };
5467
5468 /*
5469  * Local variables:
5470  *  c-basic-offset: 8
5471  * End:
5472  */