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   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 250
 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 252                                 encode_verifier_maxsz + \
 253                                 1 /* co_ownerid.len */ + \
 254                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 255                                 1 /* flags */ + \
 256                                 1 /* spa_how */ + \
 257                                 0 /* SP4_NONE (for now) */ + \
 258                                 1 /* zero implemetation id array */)
 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 260                                 2 /* eir_clientid */ + \
 261                                 1 /* eir_sequenceid */ + \
 262                                 1 /* eir_flags */ + \
 263                                 1 /* spr_how */ + \
 264                                 0 /* SP4_NONE (for now) */ + \
 265                                 2 /* eir_server_owner.so_minor_id */ + \
 266                                 /* eir_server_owner.so_major_id<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 /* eir_server_scope<> */ \
 269                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 270                                 1 /* eir_server_impl_id array length */ + \
 271                                 0 /* ignored eir_server_impl_id contents */)
 272 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 273 #define decode_channel_attrs_maxsz  (6 + \
 274                                      1 /* ca_rdma_ird.len */ + \
 275                                      1 /* ca_rdma_ird */)
 276 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 277                                      2 /* csa_clientid */ + \
 278                                      1 /* csa_sequence */ + \
 279                                      1 /* csa_flags */ + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      1 /* csa_cb_program */ + \
 283                                      1 /* csa_sec_parms.len (1) */ + \
 284                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 285                                      1 /* stamp */ + \
 286                                      1 /* machinename.len */ + \
 287                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 288                                      1 /* uid */ + \
 289                                      1 /* gid */ + \
 290                                      1 /* gids.len (0) */)
 291 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 292                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 293                                      1 /* csr_sequence */ + \
 294                                      1 /* csr_flags */ + \
 295                                      decode_channel_attrs_maxsz + \
 296                                      decode_channel_attrs_maxsz)
 297 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 298 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 299 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 300                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 301 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 302                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 303 #else /* CONFIG_NFS_V4_1 */
 304 #define encode_sequence_maxsz   0
 305 #define decode_sequence_maxsz   0
 306 #endif /* CONFIG_NFS_V4_1 */
 307
 308 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 310 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 311                                 encode_sequence_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_read_maxsz)
 314 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 315                                 decode_sequence_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 decode_read_maxsz)
 318 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 319                                 encode_sequence_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_readlink_maxsz)
 322 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 323                                 decode_sequence_maxsz + \
 324                                 decode_putfh_maxsz + \
 325                                 decode_readlink_maxsz)
 326 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 327                                 encode_sequence_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_readdir_maxsz)
 330 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 331                                 decode_sequence_maxsz + \
 332                                 decode_putfh_maxsz + \
 333                                 decode_readdir_maxsz)
 334 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_write_maxsz + \
 338                                 encode_getattr_maxsz)
 339 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 340                                 decode_sequence_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_write_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_commit_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_commit_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_savefh_maxsz + \
 358                                 encode_open_maxsz + \
 359                                 encode_getfh_maxsz + \
 360                                 encode_getattr_maxsz + \
 361                                 encode_restorefh_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_savefh_maxsz + \
 367                                 decode_open_maxsz + \
 368                                 decode_getfh_maxsz + \
 369                                 decode_getattr_maxsz + \
 370                                 decode_restorefh_maxsz + \
 371                                 decode_getattr_maxsz)
 372 #define NFS4_enc_open_confirm_sz \
 373                                 (compound_encode_hdr_maxsz + \
 374                                  encode_putfh_maxsz + \
 375                                  encode_open_confirm_maxsz)
 376 #define NFS4_dec_open_confirm_sz \
 377                                 (compound_decode_hdr_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_open_confirm_maxsz)
 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 381                                         encode_sequence_maxsz + \
 382                                         encode_putfh_maxsz + \
 383                                         encode_open_maxsz + \
 384                                         encode_getattr_maxsz)
 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 386                                         decode_sequence_maxsz + \
 387                                         decode_putfh_maxsz + \
 388                                         decode_open_maxsz + \
 389                                         decode_getattr_maxsz)
 390 #define NFS4_enc_open_downgrade_sz \
 391                                 (compound_encode_hdr_maxsz + \
 392                                  encode_sequence_maxsz + \
 393                                  encode_putfh_maxsz + \
 394                                  encode_open_downgrade_maxsz + \
 395                                  encode_getattr_maxsz)
 396 #define NFS4_dec_open_downgrade_sz \
 397                                 (compound_decode_hdr_maxsz + \
 398                                  decode_sequence_maxsz + \
 399                                  decode_putfh_maxsz + \
 400                                  decode_open_downgrade_maxsz + \
 401                                  decode_getattr_maxsz)
 402 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 403                                  encode_sequence_maxsz + \
 404                                  encode_putfh_maxsz + \
 405                                  encode_close_maxsz + \
 406                                  encode_getattr_maxsz)
 407 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_close_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_setattr_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_setattr_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_fsinfo_maxsz)
 426 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_fsinfo_maxsz)
 430 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 431                                 encode_renew_maxsz)
 432 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 433                                 decode_renew_maxsz)
 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 435                                 encode_setclientid_maxsz)
 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 437                                 decode_setclientid_maxsz)
 438 #define NFS4_enc_setclientid_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                 encode_setclientid_confirm_maxsz + \
 441                                 encode_putrootfh_maxsz + \
 442                                 encode_fsinfo_maxsz)
 443 #define NFS4_dec_setclientid_confirm_sz \
 444                                 (compound_decode_hdr_maxsz + \
 445                                 decode_setclientid_confirm_maxsz + \
 446                                 decode_putrootfh_maxsz + \
 447                                 decode_fsinfo_maxsz)
 448 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_lock_maxsz)
 452 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_lock_maxsz)
 456 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_lockt_maxsz)
 460 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_lockt_maxsz)
 464 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_locku_maxsz)
 468 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_locku_maxsz)
 472 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_access_maxsz + \
 476                                 encode_getattr_maxsz)
 477 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getattr_maxsz)
 482 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_getattr_maxsz)
 490 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_lookup_maxsz + \
 494                                 encode_getattr_maxsz + \
 495                                 encode_getfh_maxsz)
 496 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 497                                 decode_sequence_maxsz + \
 498                                 decode_putfh_maxsz + \
 499                                 decode_lookup_maxsz + \
 500                                 decode_getattr_maxsz + \
 501                                 decode_getfh_maxsz)
 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putrootfh_maxsz + \
 505                                 encode_getattr_maxsz + \
 506                                 encode_getfh_maxsz)
 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putrootfh_maxsz + \
 510                                 decode_getattr_maxsz + \
 511                                 decode_getfh_maxsz)
 512 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_remove_maxsz + \
 516                                 encode_getattr_maxsz)
 517 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 518                                 decode_sequence_maxsz + \
 519                                 decode_putfh_maxsz + \
 520                                 decode_remove_maxsz + \
 521                                 decode_getattr_maxsz)
 522 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_savefh_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_rename_maxsz + \
 528                                 encode_getattr_maxsz + \
 529                                 encode_restorefh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_savefh_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_rename_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_restorefh_maxsz + \
 539                                 decode_getattr_maxsz)
 540 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 541                                 encode_sequence_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_savefh_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_link_maxsz + \
 546                                 decode_getattr_maxsz + \
 547                                 encode_restorefh_maxsz + \
 548                                 decode_getattr_maxsz)
 549 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_savefh_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_link_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_restorefh_maxsz + \
 557                                 decode_getattr_maxsz)
 558 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_symlink_maxsz + \
 562                                 encode_getattr_maxsz + \
 563                                 encode_getfh_maxsz)
 564 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 565                                 decode_sequence_maxsz + \
 566                                 decode_putfh_maxsz + \
 567                                 decode_symlink_maxsz + \
 568                                 decode_getattr_maxsz + \
 569                                 decode_getfh_maxsz)
 570 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_create_maxsz + \
 575                                 encode_getfh_maxsz + \
 576                                 encode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 encode_getattr_maxsz)
 579 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_create_maxsz + \
 584                                 decode_getfh_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_statfs_maxsz)
 600 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_statfs_maxsz)
 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_delegreturn_maxsz + \
 616                                 encode_getattr_maxsz)
 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_delegreturn_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_getacl_maxsz)
 625 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_getacl_maxsz)
 629 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_setacl_maxsz)
 633 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_setacl_maxsz)
 637 #define NFS4_enc_fs_locations_sz \
 638                                 (compound_encode_hdr_maxsz + \
 639                                  encode_sequence_maxsz + \
 640                                  encode_putfh_maxsz + \
 641                                  encode_lookup_maxsz + \
 642                                  encode_fs_locations_maxsz)
 643 #define NFS4_dec_fs_locations_sz \
 644                                 (compound_decode_hdr_maxsz + \
 645                                  decode_sequence_maxsz + \
 646                                  decode_putfh_maxsz + \
 647                                  decode_lookup_maxsz + \
 648                                  decode_fs_locations_maxsz)
 649 #if defined(CONFIG_NFS_V4_1)
 650 #define NFS4_enc_exchange_id_sz \
 651                                 (compound_encode_hdr_maxsz + \
 652                                  encode_exchange_id_maxsz)
 653 #define NFS4_dec_exchange_id_sz \
 654                                 (compound_decode_hdr_maxsz + \
 655                                  decode_exchange_id_maxsz)
 656 #define NFS4_enc_create_session_sz \
 657                                 (compound_encode_hdr_maxsz + \
 658                                  encode_create_session_maxsz)
 659 #define NFS4_dec_create_session_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_create_session_maxsz)
 662 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 663                                          encode_destroy_session_maxsz)
 664 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 665                                          decode_destroy_session_maxsz)
 666 #define NFS4_enc_sequence_sz \
 667                                 (compound_decode_hdr_maxsz + \
 668                                  encode_sequence_maxsz)
 669 #define NFS4_dec_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_sequence_maxsz)
 672 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 673                                          encode_sequence_maxsz + \
 674                                          encode_putrootfh_maxsz + \
 675                                          encode_fsinfo_maxsz)
 676 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 677                                          decode_sequence_maxsz + \
 678                                          decode_putrootfh_maxsz + \
 679                                          decode_fsinfo_maxsz)
 680 #endif /* CONFIG_NFS_V4_1 */
 681
 682 static const umode_t nfs_type2fmt[] = {
 683         [NF4BAD] = 0,
 684         [NF4REG] = S_IFREG,
 685         [NF4DIR] = S_IFDIR,
 686         [NF4BLK] = S_IFBLK,
 687         [NF4CHR] = S_IFCHR,
 688         [NF4LNK] = S_IFLNK,
 689         [NF4SOCK] = S_IFSOCK,
 690         [NF4FIFO] = S_IFIFO,
 691         [NF4ATTRDIR] = 0,
 692         [NF4NAMEDATTR] = 0,
 693 };
 694
 695 struct compound_hdr {
 696         int32_t         status;
 697         uint32_t        nops;
 698         __be32 *        nops_p;
 699         uint32_t        taglen;
 700         char *          tag;
 701         uint32_t        replen;         /* expected reply words */
 702         u32             minorversion;
 703 };
 704
 705 /*
 706  * START OF "GENERIC" ENCODE ROUTINES.
 707  *   These may look a little ugly since they are imported from a "generic"
 708  * set of XDR encode/decode routines which are intended to be shared by
 709  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 710  *
 711  * If the pain of reading these is too great, it should be a straightforward
 712  * task to translate them into Linux-specific versions which are more
 713  * consistent with the style used in NFSv2/v3...
 714  */
 715 #define RESERVE_SPACE(nbytes)   do {                            \
 716         p = xdr_reserve_space(xdr, nbytes);                     \
 717         BUG_ON(!p);                                             \
 718 } while (0)
 719
 720 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 721 {
 722         __be32 *p;
 723
 724         p = xdr_reserve_space(xdr, 4 + len);
 725         BUG_ON(p == NULL);
 726         xdr_encode_opaque(p, str, len);
 727 }
 728
 729 static void encode_compound_hdr(struct xdr_stream *xdr,
 730                                 struct rpc_rqst *req,
 731                                 struct compound_hdr *hdr)
 732 {
 733         __be32 *p;
 734         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 735
 736         /* initialize running count of expected bytes in reply.
 737          * NOTE: the replied tag SHOULD be the same is the one sent,
 738          * but this is not required as a MUST for the server to do so. */
 739         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 740
 741         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 742         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 743         RESERVE_SPACE(12 + hdr->taglen);
 744         *p++ = cpu_to_be32(hdr->taglen);
 745         p = xdr_encode_opaque_fixed(p, hdr->tag, hdr->taglen);
 746         *p++ = cpu_to_be32(hdr->minorversion);
 747         hdr->nops_p = p;
 748         *p++ = cpu_to_be32(hdr->nops);
 749 }
 750
 751 static void encode_nops(struct compound_hdr *hdr)
 752 {
 753         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 754         *hdr->nops_p = htonl(hdr->nops);
 755 }
 756
 757 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 758 {
 759         __be32 *p;
 760
 761         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 762         BUG_ON(p == NULL);
 763         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 764 }
 765
 766 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 767 {
 768         char owner_name[IDMAP_NAMESZ];
 769         char owner_group[IDMAP_NAMESZ];
 770         int owner_namelen = 0;
 771         int owner_grouplen = 0;
 772         __be32 *p;
 773         __be32 *q;
 774         int len;
 775         uint32_t bmval0 = 0;
 776         uint32_t bmval1 = 0;
 777
 778         /*
 779          * We reserve enough space to write the entire attribute buffer at once.
 780          * In the worst-case, this would be
 781          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 782          *          = 36 bytes, plus any contribution from variable-length fields
 783          *            such as owner/group.
 784          */
 785         len = 16;
 786
 787         /* Sigh */
 788         if (iap->ia_valid & ATTR_SIZE)
 789                 len += 8;
 790         if (iap->ia_valid & ATTR_MODE)
 791                 len += 4;
 792         if (iap->ia_valid & ATTR_UID) {
 793                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 794                 if (owner_namelen < 0) {
 795                         dprintk("nfs: couldn't resolve uid %d to string\n",
 796                                         iap->ia_uid);
 797                         /* XXX */
 798                         strcpy(owner_name, "nobody");
 799                         owner_namelen = sizeof("nobody") - 1;
 800                         /* goto out; */
 801                 }
 802                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 803         }
 804         if (iap->ia_valid & ATTR_GID) {
 805                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 806                 if (owner_grouplen < 0) {
 807                         dprintk("nfs: couldn't resolve gid %d to string\n",
 808                                         iap->ia_gid);
 809                         strcpy(owner_group, "nobody");
 810                         owner_grouplen = sizeof("nobody") - 1;
 811                         /* goto out; */
 812                 }
 813                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 814         }
 815         if (iap->ia_valid & ATTR_ATIME_SET)
 816                 len += 16;
 817         else if (iap->ia_valid & ATTR_ATIME)
 818                 len += 4;
 819         if (iap->ia_valid & ATTR_MTIME_SET)
 820                 len += 16;
 821         else if (iap->ia_valid & ATTR_MTIME)
 822                 len += 4;
 823         RESERVE_SPACE(len);
 824
 825         /*
 826          * We write the bitmap length now, but leave the bitmap and the attribute
 827          * buffer length to be backfilled at the end of this routine.
 828          */
 829         *p++ = cpu_to_be32(2);
 830         q = p;
 831         p += 3;
 832
 833         if (iap->ia_valid & ATTR_SIZE) {
 834                 bmval0 |= FATTR4_WORD0_SIZE;
 835                 p = xdr_encode_hyper(p, iap->ia_size);
 836         }
 837         if (iap->ia_valid & ATTR_MODE) {
 838                 bmval1 |= FATTR4_WORD1_MODE;
 839                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 840         }
 841         if (iap->ia_valid & ATTR_UID) {
 842                 bmval1 |= FATTR4_WORD1_OWNER;
 843                 *p++ = cpu_to_be32(owner_namelen);
 844                 p = xdr_encode_opaque_fixed(p, owner_name, owner_namelen);
 845         }
 846         if (iap->ia_valid & ATTR_GID) {
 847                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 848                 *p++ = cpu_to_be32(owner_grouplen);
 849                 p = xdr_encode_opaque_fixed(p, owner_group, owner_grouplen);
 850         }
 851         if (iap->ia_valid & ATTR_ATIME_SET) {
 852                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 853                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 854                 *p++ = cpu_to_be32(0);
 855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 856                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 857         }
 858         else if (iap->ia_valid & ATTR_ATIME) {
 859                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 860                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 861         }
 862         if (iap->ia_valid & ATTR_MTIME_SET) {
 863                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 864                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 865                 *p++ = cpu_to_be32(0);
 866                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 867                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 868         }
 869         else if (iap->ia_valid & ATTR_MTIME) {
 870                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 871                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 872         }
 873
 874         /*
 875          * Now we backfill the bitmap and the attribute buffer length.
 876          */
 877         if (len != ((char *)p - (char *)q) + 4) {
 878                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 879                                 len, ((char *)p - (char *)q) + 4);
 880                 BUG();
 881         }
 882         len = (char *)p - (char *)q - 12;
 883         *q++ = htonl(bmval0);
 884         *q++ = htonl(bmval1);
 885         *q++ = htonl(len);
 886
 887 /* out: */
 888 }
 889
 890 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 891 {
 892         __be32 *p;
 893
 894         RESERVE_SPACE(8);
 895         *p++ = cpu_to_be32(OP_ACCESS);
 896         *p++ = cpu_to_be32(access);
 897         hdr->nops++;
 898         hdr->replen += decode_access_maxsz;
 899 }
 900
 901 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 902 {
 903         __be32 *p;
 904
 905         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 906         *p++ = cpu_to_be32(OP_CLOSE);
 907         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 908         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 909         hdr->nops++;
 910         hdr->replen += decode_close_maxsz;
 911 }
 912
 913 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 914 {
 915         __be32 *p;
 916
 917         RESERVE_SPACE(16);
 918         *p++ = cpu_to_be32(OP_COMMIT);
 919         p = xdr_encode_hyper(p, args->offset);
 920         *p++ = cpu_to_be32(args->count);
 921         hdr->nops++;
 922         hdr->replen += decode_commit_maxsz;
 923 }
 924
 925 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 926 {
 927         __be32 *p;
 928
 929         RESERVE_SPACE(8);
 930         *p++ = cpu_to_be32(OP_CREATE);
 931         *p++ = cpu_to_be32(create->ftype);
 932
 933         switch (create->ftype) {
 934         case NF4LNK:
 935                 RESERVE_SPACE(4);
 936                 *p++ = cpu_to_be32(create->u.symlink.len);
 937                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 938                 break;
 939
 940         case NF4BLK: case NF4CHR:
 941                 RESERVE_SPACE(8);
 942                 *p++ = cpu_to_be32(create->u.device.specdata1);
 943                 *p++ = cpu_to_be32(create->u.device.specdata2);
 944                 break;
 945
 946         default:
 947                 break;
 948         }
 949
 950         RESERVE_SPACE(4 + create->name->len);
 951         *p++ = cpu_to_be32(create->name->len);
 952         p = xdr_encode_opaque_fixed(p, create->name->name, create->name->len);
 953         hdr->nops++;
 954         hdr->replen += decode_create_maxsz;
 955
 956         encode_attrs(xdr, create->attrs, create->server);
 957 }
 958
 959 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 960 {
 961         __be32 *p;
 962
 963         RESERVE_SPACE(12);
 964         *p++ = cpu_to_be32(OP_GETATTR);
 965         *p++ = cpu_to_be32(1);
 966         *p++ = cpu_to_be32(bitmap);
 967         hdr->nops++;
 968         hdr->replen += decode_getattr_maxsz;
 969 }
 970
 971 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 972 {
 973         __be32 *p;
 974
 975         RESERVE_SPACE(16);
 976         *p++ = cpu_to_be32(OP_GETATTR);
 977         *p++ = cpu_to_be32(2);
 978         *p++ = cpu_to_be32(bm0);
 979         *p++ = cpu_to_be32(bm1);
 980         hdr->nops++;
 981         hdr->replen += decode_getattr_maxsz;
 982 }
 983
 984 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 985 {
 986         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 987                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 988 }
 989
 990 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 991 {
 992         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 993                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 994 }
 995
 996 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 997 {
 998         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 999                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1000 }
1001
1002 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1003 {
1004         __be32 *p;
1005
1006         RESERVE_SPACE(4);
1007         *p++ = cpu_to_be32(OP_GETFH);
1008         hdr->nops++;
1009         hdr->replen += decode_getfh_maxsz;
1010 }
1011
1012 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1013 {
1014         __be32 *p;
1015
1016         RESERVE_SPACE(8 + name->len);
1017         *p++ = cpu_to_be32(OP_LINK);
1018         *p++ = cpu_to_be32(name->len);
1019         p = xdr_encode_opaque_fixed(p, name->name, name->len);
1020         hdr->nops++;
1021         hdr->replen += decode_link_maxsz;
1022 }
1023
1024 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1025 {
1026         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1027                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1028         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1029 }
1030
1031 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1032 {
1033         if (fl->fl_end == OFFSET_MAX)
1034                 return ~(uint64_t)0;
1035         return fl->fl_end - fl->fl_start + 1;
1036 }
1037
1038 /*
1039  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1040  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1041  */
1042 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1043 {
1044         __be32 *p;
1045
1046         RESERVE_SPACE(32);
1047         *p++ = cpu_to_be32(OP_LOCK);
1048         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1049         *p++ = cpu_to_be32(args->reclaim);
1050         p = xdr_encode_hyper(p, args->fl->fl_start);
1051         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1052         *p++ = cpu_to_be32(args->new_lock_owner);
1053         if (args->new_lock_owner){
1054                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1055                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1056                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1057                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1058                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1059                 *p++ = cpu_to_be32(16);
1060                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1061                 p = xdr_encode_hyper(p, args->lock_owner.id);
1062         }
1063         else {
1064                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1065                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1066                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1067         }
1068         hdr->nops++;
1069         hdr->replen += decode_lock_maxsz;
1070 }
1071
1072 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1073 {
1074         __be32 *p;
1075
1076         RESERVE_SPACE(52);
1077         *p++ = cpu_to_be32(OP_LOCKT);
1078         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1079         p = xdr_encode_hyper(p, args->fl->fl_start);
1080         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1081         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1082         *p++ = cpu_to_be32(16);
1083         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1084         p = xdr_encode_hyper(p, args->lock_owner.id);
1085         hdr->nops++;
1086         hdr->replen += decode_lockt_maxsz;
1087 }
1088
1089 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1090 {
1091         __be32 *p;
1092
1093         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1094         *p++ = cpu_to_be32(OP_LOCKU);
1095         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1096         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1097         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1098         p = xdr_encode_hyper(p, args->fl->fl_start);
1099         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1100         hdr->nops++;
1101         hdr->replen += decode_locku_maxsz;
1102 }
1103
1104 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1105 {
1106         int len = name->len;
1107         __be32 *p;
1108
1109         RESERVE_SPACE(8 + len);
1110         *p++ = cpu_to_be32(OP_LOOKUP);
1111         *p++ = cpu_to_be32(len);
1112         p = xdr_encode_opaque_fixed(p, name->name, len);
1113         hdr->nops++;
1114         hdr->replen += decode_lookup_maxsz;
1115 }
1116
1117 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1118 {
1119         __be32 *p;
1120
1121         RESERVE_SPACE(8);
1122         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1123         case FMODE_READ:
1124                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1125                 break;
1126         case FMODE_WRITE:
1127                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1128                 break;
1129         case FMODE_READ|FMODE_WRITE:
1130                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1131                 break;
1132         default:
1133                 *p++ = cpu_to_be32(0);
1134         }
1135         *p++ = cpu_to_be32(0);          /* for linux, share_deny = 0 always */
1136 }
1137
1138 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1139 {
1140         __be32 *p;
1141  /*
1142  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1143  * owner 4 = 32
1144  */
1145         RESERVE_SPACE(8);
1146         *p++ = cpu_to_be32(OP_OPEN);
1147         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1148         encode_share_access(xdr, arg->fmode);
1149         RESERVE_SPACE(28);
1150         p = xdr_encode_hyper(p, arg->clientid);
1151         *p++ = cpu_to_be32(16);
1152         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1153         p = xdr_encode_hyper(p, arg->id);
1154 }
1155
1156 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1157 {
1158         __be32 *p;
1159
1160         RESERVE_SPACE(4);
1161         switch(arg->open_flags & O_EXCL) {
1162         case 0:
1163                 *p++ = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1164                 encode_attrs(xdr, arg->u.attrs, arg->server);
1165                 break;
1166         default:
1167                 *p++ = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1168                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1169         }
1170 }
1171
1172 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1173 {
1174         __be32 *p;
1175
1176         RESERVE_SPACE(4);
1177         switch (arg->open_flags & O_CREAT) {
1178         case 0:
1179                 *p++ = cpu_to_be32(NFS4_OPEN_NOCREATE);
1180                 break;
1181         default:
1182                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1183                 *p++ = cpu_to_be32(NFS4_OPEN_CREATE);
1184                 encode_createmode(xdr, arg);
1185         }
1186 }
1187
1188 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1189 {
1190         __be32 *p;
1191
1192         RESERVE_SPACE(4);
1193         switch (delegation_type) {
1194         case 0:
1195                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1196                 break;
1197         case FMODE_READ:
1198                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1199                 break;
1200         case FMODE_WRITE|FMODE_READ:
1201                 *p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1202                 break;
1203         default:
1204                 BUG();
1205         }
1206 }
1207
1208 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1209 {
1210         __be32 *p;
1211
1212         RESERVE_SPACE(4);
1213         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1214         encode_string(xdr, name->len, name->name);
1215 }
1216
1217 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1218 {
1219         __be32 *p;
1220
1221         RESERVE_SPACE(4);
1222         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1223         encode_delegation_type(xdr, type);
1224 }
1225
1226 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1227 {
1228         __be32 *p;
1229
1230         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1231         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1232         p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1233         encode_string(xdr, name->len, name->name);
1234 }
1235
1236 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1237 {
1238         encode_openhdr(xdr, arg);
1239         encode_opentype(xdr, arg);
1240         switch (arg->claim) {
1241         case NFS4_OPEN_CLAIM_NULL:
1242                 encode_claim_null(xdr, arg->name);
1243                 break;
1244         case NFS4_OPEN_CLAIM_PREVIOUS:
1245                 encode_claim_previous(xdr, arg->u.delegation_type);
1246                 break;
1247         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1248                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1249                 break;
1250         default:
1251                 BUG();
1252         }
1253         hdr->nops++;
1254         hdr->replen += decode_open_maxsz;
1255 }
1256
1257 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1258 {
1259         __be32 *p;
1260
1261         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1262         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1263         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1264         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1265         hdr->nops++;
1266         hdr->replen += decode_open_confirm_maxsz;
1267 }
1268
1269 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1270 {
1271         __be32 *p;
1272
1273         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1274         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1275         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1276         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
1277         encode_share_access(xdr, arg->fmode);
1278         hdr->nops++;
1279         hdr->replen += decode_open_downgrade_maxsz;
1280 }
1281
1282 static void
1283 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1284 {
1285         int len = fh->size;
1286         __be32 *p;
1287
1288         RESERVE_SPACE(8 + len);
1289         *p++ = cpu_to_be32(OP_PUTFH);
1290         *p++ = cpu_to_be32(len);
1291         p = xdr_encode_opaque_fixed(p, fh->data, len);
1292         hdr->nops++;
1293         hdr->replen += decode_putfh_maxsz;
1294 }
1295
1296 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1297 {
1298         __be32 *p;
1299
1300         RESERVE_SPACE(4);
1301         *p++ = cpu_to_be32(OP_PUTROOTFH);
1302         hdr->nops++;
1303         hdr->replen += decode_putrootfh_maxsz;
1304 }
1305
1306 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1307 {
1308         nfs4_stateid stateid;
1309         __be32 *p;
1310
1311         RESERVE_SPACE(NFS4_STATEID_SIZE);
1312         if (ctx->state != NULL) {
1313                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1314                 p = xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1315         } else
1316                 p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1317 }
1318
1319 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1320 {
1321         __be32 *p;
1322
1323         RESERVE_SPACE(4);
1324         *p++ = cpu_to_be32(OP_READ);
1325
1326         encode_stateid(xdr, args->context);
1327
1328         RESERVE_SPACE(12);
1329         p = xdr_encode_hyper(p, args->offset);
1330         *p++ = cpu_to_be32(args->count);
1331         hdr->nops++;
1332         hdr->replen += decode_read_maxsz;
1333 }
1334
1335 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1336 {
1337         uint32_t attrs[2] = {
1338                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1339                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1340         };
1341         __be32 *p;
1342
1343         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1344         *p++ = cpu_to_be32(OP_READDIR);
1345         p = xdr_encode_hyper(p, readdir->cookie);
1346         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1347         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1348         *p++ = cpu_to_be32(readdir->count);
1349         *p++ = cpu_to_be32(2);
1350         /* Switch to mounted_on_fileid if the server supports it */
1351         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1352                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1353         else
1354                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1355         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1356         *p++ = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1357         hdr->nops++;
1358         hdr->replen += decode_readdir_maxsz;
1359         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1360                         __func__,
1361                         (unsigned long long)readdir->cookie,
1362                         ((u32 *)readdir->verifier.data)[0],
1363                         ((u32 *)readdir->verifier.data)[1],
1364                         attrs[0] & readdir->bitmask[0],
1365                         attrs[1] & readdir->bitmask[1]);
1366 }
1367
1368 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1369 {
1370         __be32 *p;
1371
1372         RESERVE_SPACE(4);
1373         *p++ = cpu_to_be32(OP_READLINK);
1374         hdr->nops++;
1375         hdr->replen += decode_readlink_maxsz;
1376 }
1377
1378 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1379 {
1380         __be32 *p;
1381
1382         RESERVE_SPACE(8 + name->len);
1383         *p++ = cpu_to_be32(OP_REMOVE);
1384         *p++ = cpu_to_be32(name->len);
1385         p = xdr_encode_opaque_fixed(p, name->name, name->len);
1386         hdr->nops++;
1387         hdr->replen += decode_remove_maxsz;
1388 }
1389
1390 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1391 {
1392         __be32 *p;
1393
1394         RESERVE_SPACE(8 + oldname->len);
1395         *p++ = cpu_to_be32(OP_RENAME);
1396         *p++ = cpu_to_be32(oldname->len);
1397         p = xdr_encode_opaque_fixed(p, oldname->name, oldname->len);
1398
1399         RESERVE_SPACE(4 + newname->len);
1400         *p++ = cpu_to_be32(newname->len);
1401         p = xdr_encode_opaque_fixed(p, newname->name, newname->len);
1402         hdr->nops++;
1403         hdr->replen += decode_rename_maxsz;
1404 }
1405
1406 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1407 {
1408         __be32 *p;
1409
1410         RESERVE_SPACE(12);
1411         *p++ = cpu_to_be32(OP_RENEW);
1412         p = xdr_encode_hyper(p, client_stateid->cl_clientid);
1413         hdr->nops++;
1414         hdr->replen += decode_renew_maxsz;
1415 }
1416
1417 static void
1418 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1419 {
1420         __be32 *p;
1421
1422         RESERVE_SPACE(4);
1423         *p++ = cpu_to_be32(OP_RESTOREFH);
1424         hdr->nops++;
1425         hdr->replen += decode_restorefh_maxsz;
1426 }
1427
1428 static int
1429 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1430 {
1431         __be32 *p;
1432
1433         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1434         *p++ = cpu_to_be32(OP_SETATTR);
1435         p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1436         RESERVE_SPACE(2*4);
1437         *p++ = cpu_to_be32(1);
1438         *p++ = cpu_to_be32(FATTR4_WORD0_ACL);
1439         if (arg->acl_len % 4)
1440                 return -EINVAL;
1441         RESERVE_SPACE(4);
1442         *p++ = cpu_to_be32(arg->acl_len);
1443         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1444         hdr->nops++;
1445         hdr->replen += decode_setacl_maxsz;
1446         return 0;
1447 }
1448
1449 static void
1450 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1451 {
1452         __be32 *p;
1453
1454         RESERVE_SPACE(4);
1455         *p++ = cpu_to_be32(OP_SAVEFH);
1456         hdr->nops++;
1457         hdr->replen += decode_savefh_maxsz;
1458 }
1459
1460 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1461 {
1462         __be32 *p;
1463
1464         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1465         *p++ = cpu_to_be32(OP_SETATTR);
1466         p = xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1467         hdr->nops++;
1468         hdr->replen += decode_setattr_maxsz;
1469         encode_attrs(xdr, arg->iap, server);
1470 }
1471
1472 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1473 {
1474         __be32 *p;
1475
1476         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1477         *p++ = cpu_to_be32(OP_SETCLIENTID);
1478         p = xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1479
1480         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1481         RESERVE_SPACE(4);
1482         *p++ = cpu_to_be32(setclientid->sc_prog);
1483         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1484         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1485         RESERVE_SPACE(4);
1486         *p++ = cpu_to_be32(setclientid->sc_cb_ident);
1487         hdr->nops++;
1488         hdr->replen += decode_setclientid_maxsz;
1489 }
1490
1491 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1492 {
1493         __be32 *p;
1494
1495         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1496         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1497         p = xdr_encode_hyper(p, client_state->cl_clientid);
1498         p = xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1499         hdr->nops++;
1500         hdr->replen += decode_setclientid_confirm_maxsz;
1501 }
1502
1503 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1504 {
1505         __be32 *p;
1506
1507         RESERVE_SPACE(4);
1508         *p++ = cpu_to_be32(OP_WRITE);
1509
1510         encode_stateid(xdr, args->context);
1511
1512         RESERVE_SPACE(16);
1513         p = xdr_encode_hyper(p, args->offset);
1514         *p++ = cpu_to_be32(args->stable);
1515         *p++ = cpu_to_be32(args->count);
1516
1517         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1518         hdr->nops++;
1519         hdr->replen += decode_write_maxsz;
1520 }
1521
1522 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1523 {
1524         __be32 *p;
1525
1526         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1527
1528         *p++ = cpu_to_be32(OP_DELEGRETURN);
1529         p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1530         hdr->nops++;
1531         hdr->replen += decode_delegreturn_maxsz;
1532 }
1533
1534 #if defined(CONFIG_NFS_V4_1)
1535 /* NFSv4.1 operations */
1536 static void encode_exchange_id(struct xdr_stream *xdr,
1537                                struct nfs41_exchange_id_args *args,
1538                                struct compound_hdr *hdr)
1539 {
1540         __be32 *p;
1541
1542         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1543         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1544         p = xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1545
1546         encode_string(xdr, args->id_len, args->id);
1547
1548         RESERVE_SPACE(12);
1549         *p++ = cpu_to_be32(args->flags);
1550         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1551         *p++ = cpu_to_be32(0);  /* zero length implementation id array */
1552         hdr->nops++;
1553         hdr->replen += decode_exchange_id_maxsz;
1554 }
1555
1556 static void encode_create_session(struct xdr_stream *xdr,
1557                                   struct nfs41_create_session_args *args,
1558                                   struct compound_hdr *hdr)
1559 {
1560         __be32 *p;
1561         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1562         uint32_t len;
1563         struct nfs_client *clp = args->client;
1564
1565         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1566                         clp->cl_ipaddr);
1567
1568         RESERVE_SPACE(20 + 2*28 + 20 + len + 12);
1569         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1570         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1571         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1572         *p++ = cpu_to_be32(args->flags);                        /*flags */
1573
1574         /* Fore Channel */
1575         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1576         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1577         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1578         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1579         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1580         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1581         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1582
1583         /* Back Channel */
1584         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1585         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1586         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1587         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1588         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1589         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1590         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1591
1592         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1593         *p++ = cpu_to_be32(1);
1594         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1595
1596         /* authsys_parms rfc1831 */
1597         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1598         *p++ = cpu_to_be32(len);
1599         p = xdr_encode_opaque_fixed(p, machine_name, len);
1600         *p++ = cpu_to_be32(0);                          /* UID */
1601         *p++ = cpu_to_be32(0);                          /* GID */
1602         *p++ = cpu_to_be32(0);                          /* No more gids */
1603         hdr->nops++;
1604         hdr->replen += decode_create_session_maxsz;
1605 }
1606
1607 static void encode_destroy_session(struct xdr_stream *xdr,
1608                                    struct nfs4_session *session,
1609                                    struct compound_hdr *hdr)
1610 {
1611         __be32 *p;
1612         RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN);
1613         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1614         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1615         hdr->nops++;
1616         hdr->replen += decode_destroy_session_maxsz;
1617 }
1618 #endif /* CONFIG_NFS_V4_1 */
1619
1620 static void encode_sequence(struct xdr_stream *xdr,
1621                             const struct nfs4_sequence_args *args,
1622                             struct compound_hdr *hdr)
1623 {
1624 #if defined(CONFIG_NFS_V4_1)
1625         struct nfs4_session *session = args->sa_session;
1626         struct nfs4_slot_table *tp;
1627         struct nfs4_slot *slot;
1628         __be32 *p;
1629
1630         if (!session)
1631                 return;
1632
1633         tp = &session->fc_slot_table;
1634
1635         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1636         slot = tp->slots + args->sa_slotid;
1637
1638         RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN + 16);
1639         *p++ = cpu_to_be32(OP_SEQUENCE);
1640
1641         /*
1642          * Sessionid + seqid + slotid + max slotid + cache_this
1643          */
1644         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1645                 "max_slotid=%d cache_this=%d\n",
1646                 __func__,
1647                 ((u32 *)session->sess_id.data)[0],
1648                 ((u32 *)session->sess_id.data)[1],
1649                 ((u32 *)session->sess_id.data)[2],
1650                 ((u32 *)session->sess_id.data)[3],
1651                 slot->seq_nr, args->sa_slotid,
1652                 tp->highest_used_slotid, args->sa_cache_this);
1653         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1654         *p++ = cpu_to_be32(slot->seq_nr);
1655         *p++ = cpu_to_be32(args->sa_slotid);
1656         *p++ = cpu_to_be32(tp->highest_used_slotid);
1657         *p++ = cpu_to_be32(args->sa_cache_this);
1658         hdr->nops++;
1659         hdr->replen += decode_sequence_maxsz;
1660 #endif /* CONFIG_NFS_V4_1 */
1661 }
1662
1663 /*
1664  * END OF "GENERIC" ENCODE ROUTINES.
1665  */
1666
1667 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1668 {
1669 #if defined(CONFIG_NFS_V4_1)
1670         if (args->sa_session)
1671                 return args->sa_session->clp->cl_minorversion;
1672 #endif /* CONFIG_NFS_V4_1 */
1673         return 0;
1674 }
1675
1676 /*
1677  * Encode an ACCESS request
1678  */
1679 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1680 {
1681         struct xdr_stream xdr;
1682         struct compound_hdr hdr = {
1683                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1684         };
1685
1686         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1687         encode_compound_hdr(&xdr, req, &hdr);
1688         encode_sequence(&xdr, &args->seq_args, &hdr);
1689         encode_putfh(&xdr, args->fh, &hdr);
1690         encode_access(&xdr, args->access, &hdr);
1691         encode_getfattr(&xdr, args->bitmask, &hdr);
1692         encode_nops(&hdr);
1693         return 0;
1694 }
1695
1696 /*
1697  * Encode LOOKUP request
1698  */
1699 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1700 {
1701         struct xdr_stream xdr;
1702         struct compound_hdr hdr = {
1703                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1704         };
1705
1706         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1707         encode_compound_hdr(&xdr, req, &hdr);
1708         encode_sequence(&xdr, &args->seq_args, &hdr);
1709         encode_putfh(&xdr, args->dir_fh, &hdr);
1710         encode_lookup(&xdr, args->name, &hdr);
1711         encode_getfh(&xdr, &hdr);
1712         encode_getfattr(&xdr, args->bitmask, &hdr);
1713         encode_nops(&hdr);
1714         return 0;
1715 }
1716
1717 /*
1718  * Encode LOOKUP_ROOT request
1719  */
1720 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1721 {
1722         struct xdr_stream xdr;
1723         struct compound_hdr hdr = {
1724                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1725         };
1726
1727         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1728         encode_compound_hdr(&xdr, req, &hdr);
1729         encode_sequence(&xdr, &args->seq_args, &hdr);
1730         encode_putrootfh(&xdr, &hdr);
1731         encode_getfh(&xdr, &hdr);
1732         encode_getfattr(&xdr, args->bitmask, &hdr);
1733         encode_nops(&hdr);
1734         return 0;
1735 }
1736
1737 /*
1738  * Encode REMOVE request
1739  */
1740 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1741 {
1742         struct xdr_stream xdr;
1743         struct compound_hdr hdr = {
1744                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1745         };
1746
1747         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1748         encode_compound_hdr(&xdr, req, &hdr);
1749         encode_sequence(&xdr, &args->seq_args, &hdr);
1750         encode_putfh(&xdr, args->fh, &hdr);
1751         encode_remove(&xdr, &args->name, &hdr);
1752         encode_getfattr(&xdr, args->bitmask, &hdr);
1753         encode_nops(&hdr);
1754         return 0;
1755 }
1756
1757 /*
1758  * Encode RENAME request
1759  */
1760 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1761 {
1762         struct xdr_stream xdr;
1763         struct compound_hdr hdr = {
1764                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1765         };
1766
1767         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1768         encode_compound_hdr(&xdr, req, &hdr);
1769         encode_sequence(&xdr, &args->seq_args, &hdr);
1770         encode_putfh(&xdr, args->old_dir, &hdr);
1771         encode_savefh(&xdr, &hdr);
1772         encode_putfh(&xdr, args->new_dir, &hdr);
1773         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1774         encode_getfattr(&xdr, args->bitmask, &hdr);
1775         encode_restorefh(&xdr, &hdr);
1776         encode_getfattr(&xdr, args->bitmask, &hdr);
1777         encode_nops(&hdr);
1778         return 0;
1779 }
1780
1781 /*
1782  * Encode LINK request
1783  */
1784 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1785 {
1786         struct xdr_stream xdr;
1787         struct compound_hdr hdr = {
1788                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1789         };
1790
1791         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1792         encode_compound_hdr(&xdr, req, &hdr);
1793         encode_sequence(&xdr, &args->seq_args, &hdr);
1794         encode_putfh(&xdr, args->fh, &hdr);
1795         encode_savefh(&xdr, &hdr);
1796         encode_putfh(&xdr, args->dir_fh, &hdr);
1797         encode_link(&xdr, args->name, &hdr);
1798         encode_getfattr(&xdr, args->bitmask, &hdr);
1799         encode_restorefh(&xdr, &hdr);
1800         encode_getfattr(&xdr, args->bitmask, &hdr);
1801         encode_nops(&hdr);
1802         return 0;
1803 }
1804
1805 /*
1806  * Encode CREATE request
1807  */
1808 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1809 {
1810         struct xdr_stream xdr;
1811         struct compound_hdr hdr = {
1812                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1813         };
1814
1815         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1816         encode_compound_hdr(&xdr, req, &hdr);
1817         encode_sequence(&xdr, &args->seq_args, &hdr);
1818         encode_putfh(&xdr, args->dir_fh, &hdr);
1819         encode_savefh(&xdr, &hdr);
1820         encode_create(&xdr, args, &hdr);
1821         encode_getfh(&xdr, &hdr);
1822         encode_getfattr(&xdr, args->bitmask, &hdr);
1823         encode_restorefh(&xdr, &hdr);
1824         encode_getfattr(&xdr, args->bitmask, &hdr);
1825         encode_nops(&hdr);
1826         return 0;
1827 }
1828
1829 /*
1830  * Encode SYMLINK request
1831  */
1832 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1833 {
1834         return nfs4_xdr_enc_create(req, p, args);
1835 }
1836
1837 /*
1838  * Encode GETATTR request
1839  */
1840 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1841 {
1842         struct xdr_stream xdr;
1843         struct compound_hdr hdr = {
1844                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1845         };
1846
1847         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1848         encode_compound_hdr(&xdr, req, &hdr);
1849         encode_sequence(&xdr, &args->seq_args, &hdr);
1850         encode_putfh(&xdr, args->fh, &hdr);
1851         encode_getfattr(&xdr, args->bitmask, &hdr);
1852         encode_nops(&hdr);
1853         return 0;
1854 }
1855
1856 /*
1857  * Encode a CLOSE request
1858  */
1859 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1860 {
1861         struct xdr_stream xdr;
1862         struct compound_hdr hdr = {
1863                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1864         };
1865
1866         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1867         encode_compound_hdr(&xdr, req, &hdr);
1868         encode_sequence(&xdr, &args->seq_args, &hdr);
1869         encode_putfh(&xdr, args->fh, &hdr);
1870         encode_close(&xdr, args, &hdr);
1871         encode_getfattr(&xdr, args->bitmask, &hdr);
1872         encode_nops(&hdr);
1873         return 0;
1874 }
1875
1876 /*
1877  * Encode an OPEN request
1878  */
1879 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1880 {
1881         struct xdr_stream xdr;
1882         struct compound_hdr hdr = {
1883                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1884         };
1885
1886         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1887         encode_compound_hdr(&xdr, req, &hdr);
1888         encode_sequence(&xdr, &args->seq_args, &hdr);
1889         encode_putfh(&xdr, args->fh, &hdr);
1890         encode_savefh(&xdr, &hdr);
1891         encode_open(&xdr, args, &hdr);
1892         encode_getfh(&xdr, &hdr);
1893         encode_getfattr(&xdr, args->bitmask, &hdr);
1894         encode_restorefh(&xdr, &hdr);
1895         encode_getfattr(&xdr, args->bitmask, &hdr);
1896         encode_nops(&hdr);
1897         return 0;
1898 }
1899
1900 /*
1901  * Encode an OPEN_CONFIRM request
1902  */
1903 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1904 {
1905         struct xdr_stream xdr;
1906         struct compound_hdr hdr = {
1907                 .nops   = 0,
1908         };
1909
1910         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911         encode_compound_hdr(&xdr, req, &hdr);
1912         encode_putfh(&xdr, args->fh, &hdr);
1913         encode_open_confirm(&xdr, args, &hdr);
1914         encode_nops(&hdr);
1915         return 0;
1916 }
1917
1918 /*
1919  * Encode an OPEN request with no attributes.
1920  */
1921 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1922 {
1923         struct xdr_stream xdr;
1924         struct compound_hdr hdr = {
1925                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1926         };
1927
1928         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1929         encode_compound_hdr(&xdr, req, &hdr);
1930         encode_sequence(&xdr, &args->seq_args, &hdr);
1931         encode_putfh(&xdr, args->fh, &hdr);
1932         encode_open(&xdr, args, &hdr);
1933         encode_getfattr(&xdr, args->bitmask, &hdr);
1934         encode_nops(&hdr);
1935         return 0;
1936 }
1937
1938 /*
1939  * Encode an OPEN_DOWNGRADE request
1940  */
1941 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1942 {
1943         struct xdr_stream xdr;
1944         struct compound_hdr hdr = {
1945                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1946         };
1947
1948         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1949         encode_compound_hdr(&xdr, req, &hdr);
1950         encode_sequence(&xdr, &args->seq_args, &hdr);
1951         encode_putfh(&xdr, args->fh, &hdr);
1952         encode_open_downgrade(&xdr, args, &hdr);
1953         encode_getfattr(&xdr, args->bitmask, &hdr);
1954         encode_nops(&hdr);
1955         return 0;
1956 }
1957
1958 /*
1959  * Encode a LOCK request
1960  */
1961 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1962 {
1963         struct xdr_stream xdr;
1964         struct compound_hdr hdr = {
1965                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1966         };
1967
1968         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1969         encode_compound_hdr(&xdr, req, &hdr);
1970         encode_sequence(&xdr, &args->seq_args, &hdr);
1971         encode_putfh(&xdr, args->fh, &hdr);
1972         encode_lock(&xdr, args, &hdr);
1973         encode_nops(&hdr);
1974         return 0;
1975 }
1976
1977 /*
1978  * Encode a LOCKT request
1979  */
1980 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1981 {
1982         struct xdr_stream xdr;
1983         struct compound_hdr hdr = {
1984                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1985         };
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, req, &hdr);
1989         encode_sequence(&xdr, &args->seq_args, &hdr);
1990         encode_putfh(&xdr, args->fh, &hdr);
1991         encode_lockt(&xdr, args, &hdr);
1992         encode_nops(&hdr);
1993         return 0;
1994 }
1995
1996 /*
1997  * Encode a LOCKU request
1998  */
1999 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2000 {
2001         struct xdr_stream xdr;
2002         struct compound_hdr hdr = {
2003                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2004         };
2005
2006         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007         encode_compound_hdr(&xdr, req, &hdr);
2008         encode_sequence(&xdr, &args->seq_args, &hdr);
2009         encode_putfh(&xdr, args->fh, &hdr);
2010         encode_locku(&xdr, args, &hdr);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  * Encode a READLINK request
2017  */
2018 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *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_readlink(&xdr, args, req, &hdr);
2030
2031         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2032                         args->pgbase, args->pglen);
2033         encode_nops(&hdr);
2034         return 0;
2035 }
2036
2037 /*
2038  * Encode a READDIR request
2039  */
2040 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2041 {
2042         struct xdr_stream xdr;
2043         struct compound_hdr hdr = {
2044                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2045         };
2046
2047         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2048         encode_compound_hdr(&xdr, req, &hdr);
2049         encode_sequence(&xdr, &args->seq_args, &hdr);
2050         encode_putfh(&xdr, args->fh, &hdr);
2051         encode_readdir(&xdr, args, req, &hdr);
2052
2053         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2054                          args->pgbase, args->count);
2055         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2056                         __func__, hdr.replen << 2, args->pages,
2057                         args->pgbase, args->count);
2058         encode_nops(&hdr);
2059         return 0;
2060 }
2061
2062 /*
2063  * Encode a READ request
2064  */
2065 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2066 {
2067         struct xdr_stream xdr;
2068         struct compound_hdr hdr = {
2069                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070         };
2071
2072         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073         encode_compound_hdr(&xdr, req, &hdr);
2074         encode_sequence(&xdr, &args->seq_args, &hdr);
2075         encode_putfh(&xdr, args->fh, &hdr);
2076         encode_read(&xdr, args, &hdr);
2077
2078         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2079                          args->pages, args->pgbase, args->count);
2080         req->rq_rcv_buf.flags |= XDRBUF_READ;
2081         encode_nops(&hdr);
2082         return 0;
2083 }
2084
2085 /*
2086  * Encode an SETATTR request
2087  */
2088 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2089 {
2090         struct xdr_stream xdr;
2091         struct compound_hdr hdr = {
2092                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093         };
2094
2095         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2096         encode_compound_hdr(&xdr, req, &hdr);
2097         encode_sequence(&xdr, &args->seq_args, &hdr);
2098         encode_putfh(&xdr, args->fh, &hdr);
2099         encode_setattr(&xdr, args, args->server, &hdr);
2100         encode_getfattr(&xdr, args->bitmask, &hdr);
2101         encode_nops(&hdr);
2102         return 0;
2103 }
2104
2105 /*
2106  * Encode a GETACL request
2107  */
2108 static int
2109 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2110                 struct nfs_getaclargs *args)
2111 {
2112         struct xdr_stream xdr;
2113         struct compound_hdr hdr = {
2114                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115         };
2116         uint32_t replen;
2117
2118         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2119         encode_compound_hdr(&xdr, req, &hdr);
2120         encode_sequence(&xdr, &args->seq_args, &hdr);
2121         encode_putfh(&xdr, args->fh, &hdr);
2122         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2123         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2124
2125         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2126                 args->acl_pages, args->acl_pgbase, args->acl_len);
2127         encode_nops(&hdr);
2128         return 0;
2129 }
2130
2131 /*
2132  * Encode a WRITE request
2133  */
2134 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2135 {
2136         struct xdr_stream xdr;
2137         struct compound_hdr hdr = {
2138                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2139         };
2140
2141         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2142         encode_compound_hdr(&xdr, req, &hdr);
2143         encode_sequence(&xdr, &args->seq_args, &hdr);
2144         encode_putfh(&xdr, args->fh, &hdr);
2145         encode_write(&xdr, args, &hdr);
2146         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2147         encode_getfattr(&xdr, args->bitmask, &hdr);
2148         encode_nops(&hdr);
2149         return 0;
2150 }
2151
2152 /*
2153  *  a COMMIT request
2154  */
2155 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2156 {
2157         struct xdr_stream xdr;
2158         struct compound_hdr hdr = {
2159                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2160         };
2161
2162         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2163         encode_compound_hdr(&xdr, req, &hdr);
2164         encode_sequence(&xdr, &args->seq_args, &hdr);
2165         encode_putfh(&xdr, args->fh, &hdr);
2166         encode_commit(&xdr, args, &hdr);
2167         encode_getfattr(&xdr, args->bitmask, &hdr);
2168         encode_nops(&hdr);
2169         return 0;
2170 }
2171
2172 /*
2173  * FSINFO request
2174  */
2175 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2176 {
2177         struct xdr_stream xdr;
2178         struct compound_hdr hdr = {
2179                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2180         };
2181
2182         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2183         encode_compound_hdr(&xdr, req, &hdr);
2184         encode_sequence(&xdr, &args->seq_args, &hdr);
2185         encode_putfh(&xdr, args->fh, &hdr);
2186         encode_fsinfo(&xdr, args->bitmask, &hdr);
2187         encode_nops(&hdr);
2188         return 0;
2189 }
2190
2191 /*
2192  * a PATHCONF request
2193  */
2194 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2195 {
2196         struct xdr_stream xdr;
2197         struct compound_hdr hdr = {
2198                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199         };
2200
2201         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2202         encode_compound_hdr(&xdr, req, &hdr);
2203         encode_sequence(&xdr, &args->seq_args, &hdr);
2204         encode_putfh(&xdr, args->fh, &hdr);
2205         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2206                            &hdr);
2207         encode_nops(&hdr);
2208         return 0;
2209 }
2210
2211 /*
2212  * a STATFS request
2213  */
2214 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2215 {
2216         struct xdr_stream xdr;
2217         struct compound_hdr hdr = {
2218                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2219         };
2220
2221         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2222         encode_compound_hdr(&xdr, req, &hdr);
2223         encode_sequence(&xdr, &args->seq_args, &hdr);
2224         encode_putfh(&xdr, args->fh, &hdr);
2225         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2226                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2227         encode_nops(&hdr);
2228         return 0;
2229 }
2230
2231 /*
2232  * GETATTR_BITMAP request
2233  */
2234 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2235                                     struct nfs4_server_caps_arg *args)
2236 {
2237         struct xdr_stream xdr;
2238         struct compound_hdr hdr = {
2239                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2240         };
2241
2242         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243         encode_compound_hdr(&xdr, req, &hdr);
2244         encode_sequence(&xdr, &args->seq_args, &hdr);
2245         encode_putfh(&xdr, args->fhandle, &hdr);
2246         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2247                            FATTR4_WORD0_LINK_SUPPORT|
2248                            FATTR4_WORD0_SYMLINK_SUPPORT|
2249                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2250         encode_nops(&hdr);
2251         return 0;
2252 }
2253
2254 /*
2255  * a RENEW request
2256  */
2257 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2258 {
2259         struct xdr_stream xdr;
2260         struct compound_hdr hdr = {
2261                 .nops   = 0,
2262         };
2263
2264         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2265         encode_compound_hdr(&xdr, req, &hdr);
2266         encode_renew(&xdr, clp, &hdr);
2267         encode_nops(&hdr);
2268         return 0;
2269 }
2270
2271 /*
2272  * a SETCLIENTID request
2273  */
2274 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2275 {
2276         struct xdr_stream xdr;
2277         struct compound_hdr hdr = {
2278                 .nops   = 0,
2279         };
2280
2281         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2282         encode_compound_hdr(&xdr, req, &hdr);
2283         encode_setclientid(&xdr, sc, &hdr);
2284         encode_nops(&hdr);
2285         return 0;
2286 }
2287
2288 /*
2289  * a SETCLIENTID_CONFIRM request
2290  */
2291 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2292 {
2293         struct xdr_stream xdr;
2294         struct compound_hdr hdr = {
2295                 .nops   = 0,
2296         };
2297         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2298
2299         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2300         encode_compound_hdr(&xdr, req, &hdr);
2301         encode_setclientid_confirm(&xdr, clp, &hdr);
2302         encode_putrootfh(&xdr, &hdr);
2303         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2304         encode_nops(&hdr);
2305         return 0;
2306 }
2307
2308 /*
2309  * DELEGRETURN request
2310  */
2311 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2312 {
2313         struct xdr_stream xdr;
2314         struct compound_hdr hdr = {
2315                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2316         };
2317
2318         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2319         encode_compound_hdr(&xdr, req, &hdr);
2320         encode_sequence(&xdr, &args->seq_args, &hdr);
2321         encode_putfh(&xdr, args->fhandle, &hdr);
2322         encode_delegreturn(&xdr, args->stateid, &hdr);
2323         encode_getfattr(&xdr, args->bitmask, &hdr);
2324         encode_nops(&hdr);
2325         return 0;
2326 }
2327
2328 /*
2329  * Encode FS_LOCATIONS request
2330  */
2331 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2332 {
2333         struct xdr_stream xdr;
2334         struct compound_hdr hdr = {
2335                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2336         };
2337         uint32_t replen;
2338
2339         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2340         encode_compound_hdr(&xdr, req, &hdr);
2341         encode_sequence(&xdr, &args->seq_args, &hdr);
2342         encode_putfh(&xdr, args->dir_fh, &hdr);
2343         encode_lookup(&xdr, args->name, &hdr);
2344         replen = hdr.replen;    /* get the attribute into args->page */
2345         encode_fs_locations(&xdr, args->bitmask, &hdr);
2346
2347         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2348                         0, PAGE_SIZE);
2349         encode_nops(&hdr);
2350         return 0;
2351 }
2352
2353 #if defined(CONFIG_NFS_V4_1)
2354 /*
2355  * EXCHANGE_ID request
2356  */
2357 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2358                                     struct nfs41_exchange_id_args *args)
2359 {
2360         struct xdr_stream xdr;
2361         struct compound_hdr hdr = {
2362                 .minorversion = args->client->cl_minorversion,
2363         };
2364
2365         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2366         encode_compound_hdr(&xdr, req, &hdr);
2367         encode_exchange_id(&xdr, args, &hdr);
2368         encode_nops(&hdr);
2369         return 0;
2370 }
2371
2372 /*
2373  * a CREATE_SESSION request
2374  */
2375 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2376                                        struct nfs41_create_session_args *args)
2377 {
2378         struct xdr_stream xdr;
2379         struct compound_hdr hdr = {
2380                 .minorversion = args->client->cl_minorversion,
2381         };
2382
2383         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2384         encode_compound_hdr(&xdr, req, &hdr);
2385         encode_create_session(&xdr, args, &hdr);
2386         encode_nops(&hdr);
2387         return 0;
2388 }
2389
2390 /*
2391  * a DESTROY_SESSION request
2392  */
2393 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2394                                         struct nfs4_session *session)
2395 {
2396         struct xdr_stream xdr;
2397         struct compound_hdr hdr = {
2398                 .minorversion = session->clp->cl_minorversion,
2399         };
2400
2401         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2402         encode_compound_hdr(&xdr, req, &hdr);
2403         encode_destroy_session(&xdr, session, &hdr);
2404         encode_nops(&hdr);
2405         return 0;
2406 }
2407
2408 /*
2409  * a SEQUENCE request
2410  */
2411 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2412                                  struct nfs4_sequence_args *args)
2413 {
2414         struct xdr_stream xdr;
2415         struct compound_hdr hdr = {
2416                 .minorversion = nfs4_xdr_minorversion(args),
2417         };
2418
2419         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2420         encode_compound_hdr(&xdr, req, &hdr);
2421         encode_sequence(&xdr, args, &hdr);
2422         encode_nops(&hdr);
2423         return 0;
2424 }
2425
2426 /*
2427  * a GET_LEASE_TIME request
2428  */
2429 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2430                                        struct nfs4_get_lease_time_args *args)
2431 {
2432         struct xdr_stream xdr;
2433         struct compound_hdr hdr = {
2434                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2435         };
2436         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2437
2438         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2439         encode_compound_hdr(&xdr, req, &hdr);
2440         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2441         encode_putrootfh(&xdr, &hdr);
2442         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2443         encode_nops(&hdr);
2444         return 0;
2445 }
2446 #endif /* CONFIG_NFS_V4_1 */
2447
2448 /*
2449  * START OF "GENERIC" DECODE ROUTINES.
2450  *   These may look a little ugly since they are imported from a "generic"
2451  * set of XDR encode/decode routines which are intended to be shared by
2452  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2453  *
2454  * If the pain of reading these is too great, it should be a straightforward
2455  * task to translate them into Linux-specific versions which are more
2456  * consistent with the style used in NFSv2/v3...
2457  */
2458 #define READ32(x)         (x) = ntohl(*p++)
2459 #define READ64(x)         do {                  \
2460         (x) = (u64)ntohl(*p++) << 32;           \
2461         (x) |= ntohl(*p++);                     \
2462 } while (0)
2463 #define READTIME(x)       do {                  \
2464         p++;                                    \
2465         (x.tv_sec) = ntohl(*p++);               \
2466         (x.tv_nsec) = ntohl(*p++);              \
2467 } while (0)
2468 #define COPYMEM(x,nbytes) do {                  \
2469         memcpy((x), p, nbytes);                 \
2470         p += XDR_QUADLEN(nbytes);               \
2471 } while (0)
2472
2473 #define READ_BUF(nbytes)  do { \
2474         p = xdr_inline_decode(xdr, nbytes); \
2475         if (unlikely(!p)) { \
2476                 dprintk("nfs: %s: prematurely hit end of receive" \
2477                                 " buffer\n", __func__); \
2478                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2479                                 __func__, xdr->p, nbytes, xdr->end); \
2480                 return -EIO; \
2481         } \
2482 } while (0)
2483
2484 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2485 {
2486         __be32 *p;
2487
2488         READ_BUF(4);
2489         READ32(*len);
2490         READ_BUF(*len);
2491         *string = (char *)p;
2492         return 0;
2493 }
2494
2495 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2496 {
2497         __be32 *p;
2498
2499         READ_BUF(8);
2500         READ32(hdr->status);
2501         READ32(hdr->taglen);
2502
2503         READ_BUF(hdr->taglen + 4);
2504         hdr->tag = (char *)p;
2505         p += XDR_QUADLEN(hdr->taglen);
2506         READ32(hdr->nops);
2507         if (unlikely(hdr->nops < 1))
2508                 return nfs4_stat_to_errno(hdr->status);
2509         return 0;
2510 }
2511
2512 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2513 {
2514         __be32 *p;
2515         uint32_t opnum;
2516         int32_t nfserr;
2517
2518         READ_BUF(8);
2519         READ32(opnum);
2520         if (opnum != expected) {
2521                 dprintk("nfs: Server returned operation"
2522                         " %d but we issued a request for %d\n",
2523                                 opnum, expected);
2524                 return -EIO;
2525         }
2526         READ32(nfserr);
2527         if (nfserr != NFS_OK)
2528                 return nfs4_stat_to_errno(nfserr);
2529         return 0;
2530 }
2531
2532 /* Dummy routine */
2533 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2534 {
2535         __be32 *p;
2536         unsigned int strlen;
2537         char *str;
2538
2539         READ_BUF(12);
2540         return decode_opaque_inline(xdr, &strlen, &str);
2541 }
2542
2543 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2544 {
2545         uint32_t bmlen;
2546         __be32 *p;
2547
2548         READ_BUF(4);
2549         READ32(bmlen);
2550
2551         bitmap[0] = bitmap[1] = 0;
2552         READ_BUF((bmlen << 2));
2553         if (bmlen > 0) {
2554                 READ32(bitmap[0]);
2555                 if (bmlen > 1)
2556                         READ32(bitmap[1]);
2557         }
2558         return 0;
2559 }
2560
2561 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2562 {
2563         __be32 *p;
2564
2565         READ_BUF(4);
2566         READ32(*attrlen);
2567         *savep = xdr->p;
2568         return 0;
2569 }
2570
2571 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2572 {
2573         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2574                 decode_attr_bitmap(xdr, bitmask);
2575                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2576         } else
2577                 bitmask[0] = bitmask[1] = 0;
2578         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2579         return 0;
2580 }
2581
2582 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2583 {
2584         __be32 *p;
2585         int ret = 0;
2586
2587         *type = 0;
2588         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2589                 return -EIO;
2590         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2591                 READ_BUF(4);
2592                 READ32(*type);
2593                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2594                         dprintk("%s: bad type %d\n", __func__, *type);
2595                         return -EIO;
2596                 }
2597                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2598                 ret = NFS_ATTR_FATTR_TYPE;
2599         }
2600         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2601         return ret;
2602 }
2603
2604 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2605 {
2606         __be32 *p;
2607         int ret = 0;
2608
2609         *change = 0;
2610         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2611                 return -EIO;
2612         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2613                 READ_BUF(8);
2614                 READ64(*change);
2615                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2616                 ret = NFS_ATTR_FATTR_CHANGE;
2617         }
2618         dprintk("%s: change attribute=%Lu\n", __func__,
2619                         (unsigned long long)*change);
2620         return ret;
2621 }
2622
2623 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2624 {
2625         __be32 *p;
2626         int ret = 0;
2627
2628         *size = 0;
2629         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2630                 return -EIO;
2631         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2632                 READ_BUF(8);
2633                 READ64(*size);
2634                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2635                 ret = NFS_ATTR_FATTR_SIZE;
2636         }
2637         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2638         return ret;
2639 }
2640
2641 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2642 {
2643         __be32 *p;
2644
2645         *res = 0;
2646         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2647                 return -EIO;
2648         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2649                 READ_BUF(4);
2650                 READ32(*res);
2651                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2652         }
2653         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2654         return 0;
2655 }
2656
2657 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2658 {
2659         __be32 *p;
2660
2661         *res = 0;
2662         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2663                 return -EIO;
2664         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2665                 READ_BUF(4);
2666                 READ32(*res);
2667                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2668         }
2669         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2670         return 0;
2671 }
2672
2673 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2674 {
2675         __be32 *p;
2676         int ret = 0;
2677
2678         fsid->major = 0;
2679         fsid->minor = 0;
2680         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2681                 return -EIO;
2682         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2683                 READ_BUF(16);
2684                 READ64(fsid->major);
2685                 READ64(fsid->minor);
2686                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2687                 ret = NFS_ATTR_FATTR_FSID;
2688         }
2689         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2690                         (unsigned long long)fsid->major,
2691                         (unsigned long long)fsid->minor);
2692         return ret;
2693 }
2694
2695 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2696 {
2697         __be32 *p;
2698
2699         *res = 60;
2700         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2701                 return -EIO;
2702         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2703                 READ_BUF(4);
2704                 READ32(*res);
2705                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2706         }
2707         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2708         return 0;
2709 }
2710
2711 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2712 {
2713         __be32 *p;
2714
2715         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2716         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2717                 return -EIO;
2718         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2719                 READ_BUF(4);
2720                 READ32(*res);
2721                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2722         }
2723         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2724         return 0;
2725 }
2726
2727 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2728 {
2729         __be32 *p;
2730         int ret = 0;
2731
2732         *fileid = 0;
2733         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2734                 return -EIO;
2735         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2736                 READ_BUF(8);
2737                 READ64(*fileid);
2738                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2739                 ret = NFS_ATTR_FATTR_FILEID;
2740         }
2741         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2742         return ret;
2743 }
2744
2745 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2746 {
2747         __be32 *p;
2748         int ret = 0;
2749
2750         *fileid = 0;
2751         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2752                 return -EIO;
2753         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2754                 READ_BUF(8);
2755                 READ64(*fileid);
2756                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2757                 ret = NFS_ATTR_FATTR_FILEID;
2758         }
2759         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2760         return ret;
2761 }
2762
2763 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2764 {
2765         __be32 *p;
2766         int status = 0;
2767
2768         *res = 0;
2769         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2770                 return -EIO;
2771         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2772                 READ_BUF(8);
2773                 READ64(*res);
2774                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2775         }
2776         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2777         return status;
2778 }
2779
2780 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2781 {
2782         __be32 *p;
2783         int status = 0;
2784
2785         *res = 0;
2786         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2787                 return -EIO;
2788         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2789                 READ_BUF(8);
2790                 READ64(*res);
2791                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2792         }
2793         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2794         return status;
2795 }
2796
2797 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2798 {
2799         __be32 *p;
2800         int status = 0;
2801
2802         *res = 0;
2803         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2804                 return -EIO;
2805         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2806                 READ_BUF(8);
2807                 READ64(*res);
2808                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2809         }
2810         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2811         return status;
2812 }
2813
2814 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2815 {
2816         u32 n;
2817         __be32 *p;
2818         int status = 0;
2819
2820         READ_BUF(4);
2821         READ32(n);
2822         if (n == 0)
2823                 goto root_path;
2824         dprintk("path ");
2825         path->ncomponents = 0;
2826         while (path->ncomponents < n) {
2827                 struct nfs4_string *component = &path->components[path->ncomponents];
2828                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2829                 if (unlikely(status != 0))
2830                         goto out_eio;
2831                 if (path->ncomponents != n)
2832                         dprintk("/");
2833                 dprintk("%s", component->data);
2834                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2835                         path->ncomponents++;
2836                 else {
2837                         dprintk("cannot parse %d components in path\n", n);
2838                         goto out_eio;
2839                 }
2840         }
2841 out:
2842         dprintk("\n");
2843         return status;
2844 root_path:
2845 /* a root pathname is sent as a zero component4 */
2846         path->ncomponents = 1;
2847         path->components[0].len=0;
2848         path->components[0].data=NULL;
2849         dprintk("path /\n");
2850         goto out;
2851 out_eio:
2852         dprintk(" status %d", status);
2853         status = -EIO;
2854         goto out;
2855 }
2856
2857 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2858 {
2859         int n;
2860         __be32 *p;
2861         int status = -EIO;
2862
2863         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2864                 goto out;
2865         status = 0;
2866         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2867                 goto out;
2868         dprintk("%s: fsroot ", __func__);
2869         status = decode_pathname(xdr, &res->fs_path);
2870         if (unlikely(status != 0))
2871                 goto out;
2872         READ_BUF(4);
2873         READ32(n);
2874         if (n <= 0)
2875                 goto out_eio;
2876         res->nlocations = 0;
2877         while (res->nlocations < n) {
2878                 u32 m;
2879                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2880
2881                 READ_BUF(4);
2882                 READ32(m);
2883
2884                 loc->nservers = 0;
2885                 dprintk("%s: servers ", __func__);
2886                 while (loc->nservers < m) {
2887                         struct nfs4_string *server = &loc->servers[loc->nservers];
2888                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2889                         if (unlikely(status != 0))
2890                                 goto out_eio;
2891                         dprintk("%s ", server->data);
2892                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2893                                 loc->nservers++;
2894                         else {
2895                                 unsigned int i;
2896                                 dprintk("%s: using first %u of %u servers "
2897                                         "returned for location %u\n",
2898                                                 __func__,
2899                                                 NFS4_FS_LOCATION_MAXSERVERS,
2900                                                 m, res->nlocations);
2901                                 for (i = loc->nservers; i < m; i++) {
2902                                         unsigned int len;
2903                                         char *data;
2904                                         status = decode_opaque_inline(xdr, &len, &data);
2905                                         if (unlikely(status != 0))
2906                                                 goto out_eio;
2907                                 }
2908                         }
2909                 }
2910                 status = decode_pathname(xdr, &loc->rootpath);
2911                 if (unlikely(status != 0))
2912                         goto out_eio;
2913                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2914                         res->nlocations++;
2915         }
2916         if (res->nlocations != 0)
2917                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2918 out:
2919         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2920         return status;
2921 out_eio:
2922         status = -EIO;
2923         goto out;
2924 }
2925
2926 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2927 {
2928         __be32 *p;
2929         int status = 0;
2930
2931         *res = 0;
2932         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2933                 return -EIO;
2934         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2935                 READ_BUF(8);
2936                 READ64(*res);
2937                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2938         }
2939         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2940         return status;
2941 }
2942
2943 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2944 {
2945         __be32 *p;
2946         int status = 0;
2947
2948         *maxlink = 1;
2949         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2950                 return -EIO;
2951         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2952                 READ_BUF(4);
2953                 READ32(*maxlink);
2954                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2955         }
2956         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2957         return status;
2958 }
2959
2960 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2961 {
2962         __be32 *p;
2963         int status = 0;
2964
2965         *maxname = 1024;
2966         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2967                 return -EIO;
2968         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2969                 READ_BUF(4);
2970                 READ32(*maxname);
2971                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2972         }
2973         dprintk("%s: maxname=%u\n", __func__, *maxname);
2974         return status;
2975 }
2976
2977 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2978 {
2979         __be32 *p;
2980         int status = 0;
2981
2982         *res = 1024;
2983         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2984                 return -EIO;
2985         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2986                 uint64_t maxread;
2987                 READ_BUF(8);
2988                 READ64(maxread);
2989                 if (maxread > 0x7FFFFFFF)
2990                         maxread = 0x7FFFFFFF;
2991                 *res = (uint32_t)maxread;
2992                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2993         }
2994         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2995         return status;
2996 }
2997
2998 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2999 {
3000         __be32 *p;
3001         int status = 0;
3002
3003         *res = 1024;
3004         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3005                 return -EIO;
3006         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3007                 uint64_t maxwrite;
3008                 READ_BUF(8);
3009                 READ64(maxwrite);
3010                 if (maxwrite > 0x7FFFFFFF)
3011                         maxwrite = 0x7FFFFFFF;
3012                 *res = (uint32_t)maxwrite;
3013                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3014         }
3015         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3016         return status;
3017 }
3018
3019 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3020 {
3021         uint32_t tmp;
3022         __be32 *p;
3023         int ret = 0;
3024
3025         *mode = 0;
3026         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3027                 return -EIO;
3028         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3029                 READ_BUF(4);
3030                 READ32(tmp);
3031                 *mode = tmp & ~S_IFMT;
3032                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3033                 ret = NFS_ATTR_FATTR_MODE;
3034         }
3035         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3036         return ret;
3037 }
3038
3039 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3040 {
3041         __be32 *p;
3042         int ret = 0;
3043
3044         *nlink = 1;
3045         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3046                 return -EIO;
3047         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3048                 READ_BUF(4);
3049                 READ32(*nlink);
3050                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3051                 ret = NFS_ATTR_FATTR_NLINK;
3052         }
3053         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3054         return ret;
3055 }
3056
3057 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3058 {
3059         uint32_t len;
3060         __be32 *p;
3061         int ret = 0;
3062
3063         *uid = -2;
3064         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3065                 return -EIO;
3066         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3067                 READ_BUF(4);
3068                 READ32(len);
3069                 READ_BUF(len);
3070                 if (len < XDR_MAX_NETOBJ) {
3071                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3072                                 ret = NFS_ATTR_FATTR_OWNER;
3073                         else
3074                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3075                                                 __func__);
3076                 } else
3077                         dprintk("%s: name too long (%u)!\n",
3078                                         __func__, len);
3079                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3080         }
3081         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3082         return ret;
3083 }
3084
3085 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3086 {
3087         uint32_t len;
3088         __be32 *p;
3089         int ret = 0;
3090
3091         *gid = -2;
3092         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3093                 return -EIO;
3094         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3095                 READ_BUF(4);
3096                 READ32(len);
3097                 READ_BUF(len);
3098                 if (len < XDR_MAX_NETOBJ) {
3099                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3100                                 ret = NFS_ATTR_FATTR_GROUP;
3101                         else
3102                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3103                                                 __func__);
3104                 } else
3105                         dprintk("%s: name too long (%u)!\n",
3106                                         __func__, len);
3107                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3108         }
3109         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3110         return ret;
3111 }
3112
3113 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3114 {
3115         uint32_t major = 0, minor = 0;
3116         __be32 *p;
3117         int ret = 0;
3118
3119         *rdev = MKDEV(0,0);
3120         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3121                 return -EIO;
3122         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3123                 dev_t tmp;
3124
3125                 READ_BUF(8);
3126                 READ32(major);
3127                 READ32(minor);
3128                 tmp = MKDEV(major, minor);
3129                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3130                         *rdev = tmp;
3131                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3132                 ret = NFS_ATTR_FATTR_RDEV;
3133         }
3134         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3135         return ret;
3136 }
3137
3138 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3139 {
3140         __be32 *p;
3141         int status = 0;
3142
3143         *res = 0;
3144         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3145                 return -EIO;
3146         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3147                 READ_BUF(8);
3148                 READ64(*res);
3149                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3150         }
3151         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3152         return status;
3153 }
3154
3155 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3156 {
3157         __be32 *p;
3158         int status = 0;
3159
3160         *res = 0;
3161         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3162                 return -EIO;
3163         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3164                 READ_BUF(8);
3165                 READ64(*res);
3166                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3167         }
3168         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3169         return status;
3170 }
3171
3172 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3173 {
3174         __be32 *p;
3175         int status = 0;
3176
3177         *res = 0;
3178         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3179                 return -EIO;
3180         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3181                 READ_BUF(8);
3182                 READ64(*res);
3183                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3184         }
3185         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3186         return status;
3187 }
3188
3189 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3190 {
3191         __be32 *p;
3192         int ret = 0;
3193
3194         *used = 0;
3195         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3196                 return -EIO;
3197         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3198                 READ_BUF(8);
3199                 READ64(*used);
3200                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3201                 ret = NFS_ATTR_FATTR_SPACE_USED;
3202         }
3203         dprintk("%s: space used=%Lu\n", __func__,
3204                         (unsigned long long)*used);
3205         return ret;
3206 }
3207
3208 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3209 {
3210         __be32 *p;
3211         uint64_t sec;
3212         uint32_t nsec;
3213
3214         READ_BUF(12);
3215         READ64(sec);
3216         READ32(nsec);
3217         time->tv_sec = (time_t)sec;
3218         time->tv_nsec = (long)nsec;
3219         return 0;
3220 }
3221
3222 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3223 {
3224         int status = 0;
3225
3226         time->tv_sec = 0;
3227         time->tv_nsec = 0;
3228         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3229                 return -EIO;
3230         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3231                 status = decode_attr_time(xdr, time);
3232                 if (status == 0)
3233                         status = NFS_ATTR_FATTR_ATIME;
3234                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3235         }
3236         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3237         return status;
3238 }
3239
3240 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3241 {
3242         int status = 0;
3243
3244         time->tv_sec = 0;
3245         time->tv_nsec = 0;
3246         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3247                 return -EIO;
3248         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3249                 status = decode_attr_time(xdr, time);
3250                 if (status == 0)
3251                         status = NFS_ATTR_FATTR_CTIME;
3252                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3253         }
3254         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3255         return status;
3256 }
3257
3258 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3259 {
3260         int status = 0;
3261
3262         time->tv_sec = 0;
3263         time->tv_nsec = 0;
3264         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3265                 return -EIO;
3266         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3267                 status = decode_attr_time(xdr, time);
3268                 if (status == 0)
3269                         status = NFS_ATTR_FATTR_MTIME;
3270                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3271         }
3272         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3273         return status;
3274 }
3275
3276 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3277 {
3278         unsigned int attrwords = XDR_QUADLEN(attrlen);
3279         unsigned int nwords = xdr->p - savep;
3280
3281         if (unlikely(attrwords != nwords)) {
3282                 dprintk("%s: server returned incorrect attribute length: "
3283                         "%u %c %u\n",
3284                                 __func__,
3285                                 attrwords << 2,
3286                                 (attrwords < nwords) ? '<' : '>',
3287                                 nwords << 2);
3288                 return -EIO;
3289         }
3290         return 0;
3291 }
3292
3293 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3294 {
3295         __be32 *p;
3296
3297         READ_BUF(20);
3298         READ32(cinfo->atomic);
3299         READ64(cinfo->before);
3300         READ64(cinfo->after);
3301         return 0;
3302 }
3303
3304 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3305 {
3306         __be32 *p;
3307         uint32_t supp, acc;
3308         int status;
3309
3310         status = decode_op_hdr(xdr, OP_ACCESS);
3311         if (status)
3312                 return status;
3313         READ_BUF(8);
3314         READ32(supp);
3315         READ32(acc);
3316         access->supported = supp;
3317         access->access = acc;
3318         return 0;
3319 }
3320
3321 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3322 {
3323         __be32 *p;
3324         int status;
3325
3326         status = decode_op_hdr(xdr, OP_CLOSE);
3327         if (status != -EIO)
3328                 nfs_increment_open_seqid(status, res->seqid);
3329         if (status)
3330                 return status;
3331         READ_BUF(NFS4_STATEID_SIZE);
3332         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3333         return 0;
3334 }
3335
3336 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3337 {
3338         __be32 *p;
3339         int status;
3340
3341         status = decode_op_hdr(xdr, OP_COMMIT);
3342         if (status)
3343                 return status;
3344         READ_BUF(8);
3345         COPYMEM(res->verf->verifier, 8);
3346         return 0;
3347 }
3348
3349 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3350 {
3351         __be32 *p;
3352         uint32_t bmlen;
3353         int status;
3354
3355         status = decode_op_hdr(xdr, OP_CREATE);
3356         if (status)
3357                 return status;
3358         if ((status = decode_change_info(xdr, cinfo)))
3359                 return status;
3360         READ_BUF(4);
3361         READ32(bmlen);
3362         READ_BUF(bmlen << 2);
3363         return 0;
3364 }
3365
3366 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3367 {
3368         __be32 *savep;
3369         uint32_t attrlen, bitmap[2] = {0};
3370         int status;
3371
3372         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3373                 goto xdr_error;
3374         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3375                 goto xdr_error;
3376         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3377                 goto xdr_error;
3378         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3379                 goto xdr_error;
3380         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3381                 goto xdr_error;
3382         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3383                 goto xdr_error;
3384         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3385                 goto xdr_error;
3386         status = verify_attr_len(xdr, savep, attrlen);
3387 xdr_error:
3388         dprintk("%s: xdr returned %d!\n", __func__, -status);
3389         return status;
3390 }
3391
3392 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3393 {
3394         __be32 *savep;
3395         uint32_t attrlen, bitmap[2] = {0};
3396         int status;
3397
3398         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3399                 goto xdr_error;
3400         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3401                 goto xdr_error;
3402         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3403                 goto xdr_error;
3404
3405         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3406                 goto xdr_error;
3407         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3408                 goto xdr_error;
3409         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3410                 goto xdr_error;
3411         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3412                 goto xdr_error;
3413         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3414                 goto xdr_error;
3415         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3416                 goto xdr_error;
3417
3418         status = verify_attr_len(xdr, savep, attrlen);
3419 xdr_error:
3420         dprintk("%s: xdr returned %d!\n", __func__, -status);
3421         return status;
3422 }
3423
3424 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3425 {
3426         __be32 *savep;
3427         uint32_t attrlen, bitmap[2] = {0};
3428         int status;
3429
3430         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3431                 goto xdr_error;
3432         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3433                 goto xdr_error;
3434         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3435                 goto xdr_error;
3436
3437         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3438                 goto xdr_error;
3439         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3440                 goto xdr_error;
3441
3442         status = verify_attr_len(xdr, savep, attrlen);
3443 xdr_error:
3444         dprintk("%s: xdr returned %d!\n", __func__, -status);
3445         return status;
3446 }
3447
3448 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3449 {
3450         __be32 *savep;
3451         uint32_t attrlen,
3452                  bitmap[2] = {0},
3453                  type;
3454         int status;
3455         umode_t fmode = 0;
3456         uint64_t fileid;
3457
3458         status = decode_op_hdr(xdr, OP_GETATTR);
3459         if (status < 0)
3460                 goto xdr_error;
3461
3462         status = decode_attr_bitmap(xdr, bitmap);
3463         if (status < 0)
3464                 goto xdr_error;
3465
3466         status = decode_attr_length(xdr, &attrlen, &savep);
3467         if (status < 0)
3468                 goto xdr_error;
3469
3470
3471         status = decode_attr_type(xdr, bitmap, &type);
3472         if (status < 0)
3473                 goto xdr_error;
3474         fattr->mode = 0;
3475         if (status != 0) {
3476                 fattr->mode |= nfs_type2fmt[type];
3477                 fattr->valid |= status;
3478         }
3479
3480         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3481         if (status < 0)
3482                 goto xdr_error;
3483         fattr->valid |= status;
3484
3485         status = decode_attr_size(xdr, bitmap, &fattr->size);
3486         if (status < 0)
3487                 goto xdr_error;
3488         fattr->valid |= status;
3489
3490         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3491         if (status < 0)
3492                 goto xdr_error;
3493         fattr->valid |= status;
3494
3495         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3496         if (status < 0)
3497                 goto xdr_error;
3498         fattr->valid |= status;
3499
3500         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3501                                                 struct nfs4_fs_locations,
3502                                                 fattr));
3503         if (status < 0)
3504                 goto xdr_error;
3505         fattr->valid |= status;
3506
3507         status = decode_attr_mode(xdr, bitmap, &fmode);
3508         if (status < 0)
3509                 goto xdr_error;
3510         if (status != 0) {
3511                 fattr->mode |= fmode;
3512                 fattr->valid |= status;
3513         }
3514
3515         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3516         if (status < 0)
3517                 goto xdr_error;
3518         fattr->valid |= status;
3519
3520         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3521         if (status < 0)
3522                 goto xdr_error;
3523         fattr->valid |= status;
3524
3525         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3526         if (status < 0)
3527                 goto xdr_error;
3528         fattr->valid |= status;
3529
3530         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3531         if (status < 0)
3532                 goto xdr_error;
3533         fattr->valid |= status;
3534
3535         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3536         if (status < 0)
3537                 goto xdr_error;
3538         fattr->valid |= status;
3539
3540         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3541         if (status < 0)
3542                 goto xdr_error;
3543         fattr->valid |= status;
3544
3545         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3546         if (status < 0)
3547                 goto xdr_error;
3548         fattr->valid |= status;
3549
3550         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3551         if (status < 0)
3552                 goto xdr_error;
3553         fattr->valid |= status;
3554
3555         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3556         if (status < 0)
3557                 goto xdr_error;
3558         if (status != 0 && !(fattr->valid & status)) {
3559                 fattr->fileid = fileid;
3560                 fattr->valid |= status;
3561         }
3562
3563         status = verify_attr_len(xdr, savep, attrlen);
3564 xdr_error:
3565         dprintk("%s: xdr returned %d\n", __func__, -status);
3566         return status;
3567 }
3568
3569
3570 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3571 {
3572         __be32 *savep;
3573         uint32_t attrlen, bitmap[2];
3574         int status;
3575
3576         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3577                 goto xdr_error;
3578         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3579                 goto xdr_error;
3580         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3581                 goto xdr_error;
3582
3583         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3584
3585         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3586                 goto xdr_error;
3587         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3588                 goto xdr_error;
3589         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3590                 goto xdr_error;
3591         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3592         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3593                 goto xdr_error;
3594         fsinfo->wtpref = fsinfo->wtmax;
3595
3596         status = verify_attr_len(xdr, savep, attrlen);
3597 xdr_error:
3598         dprintk("%s: xdr returned %d!\n", __func__, -status);
3599         return status;
3600 }
3601
3602 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3603 {
3604         __be32 *p;
3605         uint32_t len;
3606         int status;
3607
3608         /* Zero handle first to allow comparisons */
3609         memset(fh, 0, sizeof(*fh));
3610
3611         status = decode_op_hdr(xdr, OP_GETFH);
3612         if (status)
3613                 return status;
3614
3615         READ_BUF(4);
3616         READ32(len);
3617         if (len > NFS4_FHSIZE)
3618                 return -EIO;
3619         fh->size = len;
3620         READ_BUF(len);
3621         COPYMEM(fh->data, len);
3622         return 0;
3623 }
3624
3625 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3626 {
3627         int status;
3628
3629         status = decode_op_hdr(xdr, OP_LINK);
3630         if (status)
3631                 return status;
3632         return decode_change_info(xdr, cinfo);
3633 }
3634
3635 /*
3636  * We create the owner, so we know a proper owner.id length is 4.
3637  */
3638 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3639 {
3640         uint64_t offset, length, clientid;
3641         __be32 *p;
3642         uint32_t namelen, type;
3643
3644         READ_BUF(32);
3645         READ64(offset);
3646         READ64(length);
3647         READ32(type);
3648         if (fl != NULL) {
3649                 fl->fl_start = (loff_t)offset;
3650                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3651                 if (length == ~(uint64_t)0)
3652                         fl->fl_end = OFFSET_MAX;
3653                 fl->fl_type = F_WRLCK;
3654                 if (type & 1)
3655                         fl->fl_type = F_RDLCK;
3656                 fl->fl_pid = 0;
3657         }
3658         READ64(clientid);
3659         READ32(namelen);
3660         READ_BUF(namelen);
3661         return -NFS4ERR_DENIED;
3662 }
3663
3664 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3665 {
3666         __be32 *p;
3667         int status;
3668
3669         status = decode_op_hdr(xdr, OP_LOCK);
3670         if (status == -EIO)
3671                 goto out;
3672         if (status == 0) {
3673                 READ_BUF(NFS4_STATEID_SIZE);
3674                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3675         } else if (status == -NFS4ERR_DENIED)
3676                 status = decode_lock_denied(xdr, NULL);
3677         if (res->open_seqid != NULL)
3678                 nfs_increment_open_seqid(status, res->open_seqid);
3679         nfs_increment_lock_seqid(status, res->lock_seqid);
3680 out:
3681         return status;
3682 }
3683
3684 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3685 {
3686         int status;
3687         status = decode_op_hdr(xdr, OP_LOCKT);
3688         if (status == -NFS4ERR_DENIED)
3689                 return decode_lock_denied(xdr, res->denied);
3690         return status;
3691 }
3692
3693 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3694 {
3695         __be32 *p;
3696         int status;
3697
3698         status = decode_op_hdr(xdr, OP_LOCKU);
3699         if (status != -EIO)
3700                 nfs_increment_lock_seqid(status, res->seqid);
3701         if (status == 0) {
3702                 READ_BUF(NFS4_STATEID_SIZE);
3703                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3704         }
3705         return status;
3706 }
3707
3708 static int decode_lookup(struct xdr_stream *xdr)
3709 {
3710         return decode_op_hdr(xdr, OP_LOOKUP);
3711 }
3712
3713 /* This is too sick! */
3714 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3715 {
3716         __be32 *p;
3717         uint32_t limit_type, nblocks, blocksize;
3718
3719         READ_BUF(12);
3720         READ32(limit_type);
3721         switch (limit_type) {
3722         case 1:
3723                 READ64(*maxsize);
3724                 break;
3725         case 2:
3726                 READ32(nblocks);
3727                 READ32(blocksize);
3728                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3729         }
3730         return 0;
3731 }
3732
3733 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3734 {
3735         __be32 *p;
3736         uint32_t delegation_type;
3737
3738         READ_BUF(4);
3739         READ32(delegation_type);
3740         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3741                 res->delegation_type = 0;
3742                 return 0;
3743         }
3744         READ_BUF(NFS4_STATEID_SIZE+4);
3745         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3746         READ32(res->do_recall);
3747
3748         switch (delegation_type) {
3749         case NFS4_OPEN_DELEGATE_READ:
3750                 res->delegation_type = FMODE_READ;
3751                 break;
3752         case NFS4_OPEN_DELEGATE_WRITE:
3753                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3754                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3755                                 return -EIO;
3756         }
3757         return decode_ace(xdr, NULL, res->server->nfs_client);
3758 }
3759
3760 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3761 {
3762         __be32 *p;
3763         uint32_t savewords, bmlen, i;
3764         int status;
3765
3766         status = decode_op_hdr(xdr, OP_OPEN);
3767         if (status != -EIO)
3768                 nfs_increment_open_seqid(status, res->seqid);
3769         if (status)
3770                 return status;
3771         READ_BUF(NFS4_STATEID_SIZE);
3772         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3773
3774         decode_change_info(xdr, &res->cinfo);
3775
3776         READ_BUF(8);
3777         READ32(res->rflags);
3778         READ32(bmlen);
3779         if (bmlen > 10)
3780                 goto xdr_error;
3781
3782         READ_BUF(bmlen << 2);
3783         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3784         for (i = 0; i < savewords; ++i)
3785                 READ32(res->attrset[i]);
3786         for (; i < NFS4_BITMAP_SIZE; i++)
3787                 res->attrset[i] = 0;
3788
3789         return decode_delegation(xdr, res);
3790 xdr_error:
3791         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3792         return -EIO;
3793 }
3794
3795 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3796 {
3797         __be32 *p;
3798         int status;
3799
3800         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3801         if (status != -EIO)
3802                 nfs_increment_open_seqid(status, res->seqid);
3803         if (status)
3804                 return status;
3805         READ_BUF(NFS4_STATEID_SIZE);
3806         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3807         return 0;
3808 }
3809
3810 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3811 {
3812         __be32 *p;
3813         int status;
3814
3815         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3816         if (status != -EIO)
3817                 nfs_increment_open_seqid(status, res->seqid);
3818         if (status)
3819                 return status;
3820         READ_BUF(NFS4_STATEID_SIZE);
3821         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3822         return 0;
3823 }
3824
3825 static int decode_putfh(struct xdr_stream *xdr)
3826 {
3827         return decode_op_hdr(xdr, OP_PUTFH);
3828 }
3829
3830 static int decode_putrootfh(struct xdr_stream *xdr)
3831 {
3832         return decode_op_hdr(xdr, OP_PUTROOTFH);
3833 }
3834
3835 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3836 {
3837         struct kvec *iov = req->rq_rcv_buf.head;
3838         __be32 *p;
3839         uint32_t count, eof, recvd, hdrlen;
3840         int status;
3841
3842         status = decode_op_hdr(xdr, OP_READ);
3843         if (status)
3844                 return status;
3845         READ_BUF(8);
3846         READ32(eof);
3847         READ32(count);
3848         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3849         recvd = req->rq_rcv_buf.len - hdrlen;
3850         if (count > recvd) {
3851                 dprintk("NFS: server cheating in read reply: "
3852                                 "count %u > recvd %u\n", count, recvd);
3853                 count = recvd;
3854                 eof = 0;
3855         }
3856         xdr_read_pages(xdr, count);
3857         res->eof = eof;
3858         res->count = count;
3859         return 0;
3860 }
3861
3862 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3863 {
3864         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3865         struct page     *page = *rcvbuf->pages;
3866         struct kvec     *iov = rcvbuf->head;
3867         size_t          hdrlen;
3868         u32             recvd, pglen = rcvbuf->page_len;
3869         __be32          *end, *entry, *p, *kaddr;
3870         unsigned int    nr = 0;
3871         int             status;
3872
3873         status = decode_op_hdr(xdr, OP_READDIR);
3874         if (status)
3875                 return status;
3876         READ_BUF(8);
3877         COPYMEM(readdir->verifier.data, 8);
3878         dprintk("%s: verifier = %08x:%08x\n",
3879                         __func__,
3880                         ((u32 *)readdir->verifier.data)[0],
3881                         ((u32 *)readdir->verifier.data)[1]);
3882
3883
3884         hdrlen = (char *) p - (char *) iov->iov_base;
3885         recvd = rcvbuf->len - hdrlen;
3886         if (pglen > recvd)
3887                 pglen = recvd;
3888         xdr_read_pages(xdr, pglen);
3889
3890         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3891         kaddr = p = kmap_atomic(page, KM_USER0);
3892         end = p + ((pglen + readdir->pgbase) >> 2);
3893         entry = p;
3894
3895         /* Make sure the packet actually has a value_follows and EOF entry */
3896         if ((entry + 1) > end)
3897                 goto short_pkt;
3898
3899         for (; *p++; nr++) {
3900                 u32 len, attrlen, xlen;
3901                 if (end - p < 3)
3902                         goto short_pkt;
3903                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3904                 p += 2;                 /* cookie */
3905                 len = ntohl(*p++);      /* filename length */
3906                 if (len > NFS4_MAXNAMLEN) {
3907                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3908                                         len);
3909                         goto err_unmap;
3910                 }
3911                 xlen = XDR_QUADLEN(len);
3912                 if (end - p < xlen + 1)
3913                         goto short_pkt;
3914                 dprintk("filename = %*s\n", len, (char *)p);
3915                 p += xlen;
3916                 len = ntohl(*p++);      /* bitmap length */
3917                 if (end - p < len + 1)
3918                         goto short_pkt;
3919                 p += len;
3920                 attrlen = XDR_QUADLEN(ntohl(*p++));
3921                 if (end - p < attrlen + 2)
3922                         goto short_pkt;
3923                 p += attrlen;           /* attributes */
3924                 entry = p;
3925         }
3926         /*
3927          * Apparently some server sends responses that are a valid size, but
3928          * contain no entries, and have value_follows==0 and EOF==0. For
3929          * those, just set the EOF marker.
3930          */
3931         if (!nr && entry[1] == 0) {
3932                 dprintk("NFS: readdir reply truncated!\n");
3933                 entry[1] = 1;
3934         }
3935 out:
3936         kunmap_atomic(kaddr, KM_USER0);
3937         return 0;
3938 short_pkt:
3939         /*
3940          * When we get a short packet there are 2 possibilities. We can
3941          * return an error, or fix up the response to look like a valid
3942          * response and return what we have so far. If there are no
3943          * entries and the packet was short, then return -EIO. If there
3944          * are valid entries in the response, return them and pretend that
3945          * the call was successful, but incomplete. The caller can retry the
3946          * readdir starting at the last cookie.
3947          */
3948         dprintk("%s: short packet at entry %d\n", __func__, nr);
3949         entry[0] = entry[1] = 0;
3950         if (nr)
3951                 goto out;
3952 err_unmap:
3953         kunmap_atomic(kaddr, KM_USER0);
3954         return -errno_NFSERR_IO;
3955 }
3956
3957 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3958 {
3959         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3960         struct kvec *iov = rcvbuf->head;
3961         size_t hdrlen;
3962         u32 len, recvd;
3963         __be32 *p;
3964         char *kaddr;
3965         int status;
3966
3967         status = decode_op_hdr(xdr, OP_READLINK);
3968         if (status)
3969                 return status;
3970
3971         /* Convert length of symlink */
3972         READ_BUF(4);
3973         READ32(len);
3974         if (len >= rcvbuf->page_len || len <= 0) {
3975                 dprintk("nfs: server returned giant symlink!\n");
3976                 return -ENAMETOOLONG;
3977         }
3978         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3979         recvd = req->rq_rcv_buf.len - hdrlen;
3980         if (recvd < len) {
3981                 dprintk("NFS: server cheating in readlink reply: "
3982                                 "count %u > recvd %u\n", len, recvd);
3983                 return -EIO;
3984         }
3985         xdr_read_pages(xdr, len);
3986         /*
3987          * The XDR encode routine has set things up so that
3988          * the link text will be copied directly into the
3989          * buffer.  We just have to do overflow-checking,
3990          * and and null-terminate the text (the VFS expects
3991          * null-termination).
3992          */
3993         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3994         kaddr[len+rcvbuf->page_base] = '\0';
3995         kunmap_atomic(kaddr, KM_USER0);
3996         return 0;
3997 }
3998
3999 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4000 {
4001         int status;
4002
4003         status = decode_op_hdr(xdr, OP_REMOVE);
4004         if (status)
4005                 goto out;
4006         status = decode_change_info(xdr, cinfo);
4007 out:
4008         return status;
4009 }
4010
4011 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4012               struct nfs4_change_info *new_cinfo)
4013 {
4014         int status;
4015
4016         status = decode_op_hdr(xdr, OP_RENAME);
4017         if (status)
4018                 goto out;
4019         if ((status = decode_change_info(xdr, old_cinfo)))
4020                 goto out;
4021         status = decode_change_info(xdr, new_cinfo);
4022 out:
4023         return status;
4024 }
4025
4026 static int decode_renew(struct xdr_stream *xdr)
4027 {
4028         return decode_op_hdr(xdr, OP_RENEW);
4029 }
4030
4031 static int
4032 decode_restorefh(struct xdr_stream *xdr)
4033 {
4034         return decode_op_hdr(xdr, OP_RESTOREFH);
4035 }
4036
4037 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4038                 size_t *acl_len)
4039 {
4040         __be32 *savep;
4041         uint32_t attrlen,
4042                  bitmap[2] = {0};
4043         struct kvec *iov = req->rq_rcv_buf.head;
4044         int status;
4045
4046         *acl_len = 0;
4047         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4048                 goto out;
4049         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4050                 goto out;
4051         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4052                 goto out;
4053
4054         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4055                 return -EIO;
4056         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4057                 size_t hdrlen;
4058                 u32 recvd;
4059
4060                 /* We ignore &savep and don't do consistency checks on
4061                  * the attr length.  Let userspace figure it out.... */
4062                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4063                 recvd = req->rq_rcv_buf.len - hdrlen;
4064                 if (attrlen > recvd) {
4065                         dprintk("NFS: server cheating in getattr"
4066                                         " acl reply: attrlen %u > recvd %u\n",
4067                                         attrlen, recvd);
4068                         return -EINVAL;
4069                 }
4070                 xdr_read_pages(xdr, attrlen);
4071                 *acl_len = attrlen;
4072         } else
4073                 status = -EOPNOTSUPP;
4074
4075 out:
4076         return status;
4077 }
4078
4079 static int
4080 decode_savefh(struct xdr_stream *xdr)
4081 {
4082         return decode_op_hdr(xdr, OP_SAVEFH);
4083 }
4084
4085 static int decode_setattr(struct xdr_stream *xdr)
4086 {
4087         __be32 *p;
4088         uint32_t bmlen;
4089         int status;
4090
4091         status = decode_op_hdr(xdr, OP_SETATTR);
4092         if (status)
4093                 return status;
4094         READ_BUF(4);
4095         READ32(bmlen);
4096         READ_BUF(bmlen << 2);
4097         return 0;
4098 }
4099
4100 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4101 {
4102         __be32 *p;
4103         uint32_t opnum;
4104         int32_t nfserr;
4105
4106         READ_BUF(8);
4107         READ32(opnum);
4108         if (opnum != OP_SETCLIENTID) {
4109                 dprintk("nfs: decode_setclientid: Server returned operation"
4110                         " %d\n", opnum);
4111                 return -EIO;
4112         }
4113         READ32(nfserr);
4114         if (nfserr == NFS_OK) {
4115                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4116                 READ64(clp->cl_clientid);
4117                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4118         } else if (nfserr == NFSERR_CLID_INUSE) {
4119                 uint32_t len;
4120
4121                 /* skip netid string */
4122                 READ_BUF(4);
4123                 READ32(len);
4124                 READ_BUF(len);
4125
4126                 /* skip uaddr string */
4127                 READ_BUF(4);
4128                 READ32(len);
4129                 READ_BUF(len);
4130                 return -NFSERR_CLID_INUSE;
4131         } else
4132                 return nfs4_stat_to_errno(nfserr);
4133
4134         return 0;
4135 }
4136
4137 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4138 {
4139         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4140 }
4141
4142 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4143 {
4144         __be32 *p;
4145         int status;
4146
4147         status = decode_op_hdr(xdr, OP_WRITE);
4148         if (status)
4149                 return status;
4150
4151         READ_BUF(16);
4152         READ32(res->count);
4153         READ32(res->verf->committed);
4154         COPYMEM(res->verf->verifier, 8);
4155         return 0;
4156 }
4157
4158 static int decode_delegreturn(struct xdr_stream *xdr)
4159 {
4160         return decode_op_hdr(xdr, OP_DELEGRETURN);
4161 }
4162
4163 #if defined(CONFIG_NFS_V4_1)
4164 static int decode_exchange_id(struct xdr_stream *xdr,
4165                               struct nfs41_exchange_id_res *res)
4166 {
4167         __be32 *p;
4168         uint32_t dummy;
4169         int status;
4170         struct nfs_client *clp = res->client;
4171
4172         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4173         if (status)
4174                 return status;
4175
4176         READ_BUF(8);
4177         READ64(clp->cl_ex_clid);
4178         READ_BUF(12);
4179         READ32(clp->cl_seqid);
4180         READ32(clp->cl_exchange_flags);
4181
4182         /* We ask for SP4_NONE */
4183         READ32(dummy);
4184         if (dummy != SP4_NONE)
4185                 return -EIO;
4186
4187         /* Throw away minor_id */
4188         READ_BUF(8);
4189
4190         /* Throw away Major id */
4191         READ_BUF(4);
4192         READ32(dummy);
4193         READ_BUF(dummy);
4194
4195         /* Throw away server_scope */
4196         READ_BUF(4);
4197         READ32(dummy);
4198         READ_BUF(dummy);
4199
4200         /* Throw away Implementation id array */
4201         READ_BUF(4);
4202         READ32(dummy);
4203         READ_BUF(dummy);
4204
4205         return 0;
4206 }
4207
4208 static int decode_chan_attrs(struct xdr_stream *xdr,
4209                              struct nfs4_channel_attrs *attrs)
4210 {
4211         __be32 *p;
4212         u32 nr_attrs;
4213
4214         READ_BUF(28);
4215         READ32(attrs->headerpadsz);
4216         READ32(attrs->max_rqst_sz);
4217         READ32(attrs->max_resp_sz);
4218         READ32(attrs->max_resp_sz_cached);
4219         READ32(attrs->max_ops);
4220         READ32(attrs->max_reqs);
4221         READ32(nr_attrs);
4222         if (unlikely(nr_attrs > 1)) {
4223                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4224                         __func__, nr_attrs);
4225                 return -EINVAL;
4226         }
4227         if (nr_attrs == 1)
4228                 READ_BUF(4); /* skip rdma_attrs */
4229         return 0;
4230 }
4231
4232 static int decode_create_session(struct xdr_stream *xdr,
4233                                  struct nfs41_create_session_res *res)
4234 {
4235         __be32 *p;
4236         int status;
4237         struct nfs_client *clp = res->client;
4238         struct nfs4_session *session = clp->cl_session;
4239
4240         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4241
4242         if (status)
4243                 return status;
4244
4245         /* sessionid */
4246         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4247         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4248
4249         /* seqid, flags */
4250         READ_BUF(8);
4251         READ32(clp->cl_seqid);
4252         READ32(session->flags);
4253
4254         /* Channel attributes */
4255         status = decode_chan_attrs(xdr, &session->fc_attrs);
4256         if (!status)
4257                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4258         return status;
4259 }
4260
4261 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4262 {
4263         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4264 }
4265 #endif /* CONFIG_NFS_V4_1 */
4266
4267 static int decode_sequence(struct xdr_stream *xdr,
4268                            struct nfs4_sequence_res *res,
4269                            struct rpc_rqst *rqstp)
4270 {
4271 #if defined(CONFIG_NFS_V4_1)
4272         struct nfs4_slot *slot;
4273         struct nfs4_sessionid id;
4274         u32 dummy;
4275         int status;
4276         __be32 *p;
4277
4278         if (!res->sr_session)
4279                 return 0;
4280
4281         status = decode_op_hdr(xdr, OP_SEQUENCE);
4282         if (status)
4283                 goto out_err;
4284
4285         /*
4286          * If the server returns different values for sessionID, slotID or
4287          * sequence number, the server is looney tunes.
4288          */
4289         status = -ESERVERFAULT;
4290
4291         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4292         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4293         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4294         if (memcmp(id.data, res->sr_session->sess_id.data,
4295                    NFS4_MAX_SESSIONID_LEN)) {
4296                 dprintk("%s Invalid session id\n", __func__);
4297                 goto out_err;
4298         }
4299         /* seqid */
4300         READ32(dummy);
4301         if (dummy != slot->seq_nr) {
4302                 dprintk("%s Invalid sequence number\n", __func__);
4303                 goto out_err;
4304         }
4305         /* slot id */
4306         READ32(dummy);
4307         if (dummy != res->sr_slotid) {
4308                 dprintk("%s Invalid slot id\n", __func__);
4309                 goto out_err;
4310         }
4311         /* highest slot id - currently not processed */
4312         READ32(dummy);
4313         /* target highest slot id - currently not processed */
4314         READ32(dummy);
4315         /* result flags - currently not processed */
4316         READ32(dummy);
4317         status = 0;
4318 out_err:
4319         res->sr_status = status;
4320         return status;
4321 #else  /* CONFIG_NFS_V4_1 */
4322         return 0;
4323 #endif /* CONFIG_NFS_V4_1 */
4324 }
4325
4326 /*
4327  * END OF "GENERIC" DECODE ROUTINES.
4328  */
4329
4330 /*
4331  * Decode OPEN_DOWNGRADE response
4332  */
4333 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4334 {
4335         struct xdr_stream xdr;
4336         struct compound_hdr hdr;
4337         int status;
4338
4339         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4340         status = decode_compound_hdr(&xdr, &hdr);
4341         if (status)
4342                 goto out;
4343         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4344         if (status)
4345                 goto out;
4346         status = decode_putfh(&xdr);
4347         if (status)
4348                 goto out;
4349         status = decode_open_downgrade(&xdr, res);
4350         if (status != 0)
4351                 goto out;
4352         decode_getfattr(&xdr, res->fattr, res->server);
4353 out:
4354         return status;
4355 }
4356
4357 /*
4358  * Decode ACCESS response
4359  */
4360 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4361 {
4362         struct xdr_stream xdr;
4363         struct compound_hdr hdr;
4364         int status;
4365
4366         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4367         status = decode_compound_hdr(&xdr, &hdr);
4368         if (status)
4369                 goto out;
4370         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4371         if (status)
4372                 goto out;
4373         status = decode_putfh(&xdr);
4374         if (status != 0)
4375                 goto out;
4376         status = decode_access(&xdr, res);
4377         if (status != 0)
4378                 goto out;
4379         decode_getfattr(&xdr, res->fattr, res->server);
4380 out:
4381         return status;
4382 }
4383
4384 /*
4385  * Decode LOOKUP response
4386  */
4387 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4388 {
4389         struct xdr_stream xdr;
4390         struct compound_hdr hdr;
4391         int status;
4392
4393         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4394         status = decode_compound_hdr(&xdr, &hdr);
4395         if (status)
4396                 goto out;
4397         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4398         if (status)
4399                 goto out;
4400         if ((status = decode_putfh(&xdr)) != 0)
4401                 goto out;
4402         if ((status = decode_lookup(&xdr)) != 0)
4403                 goto out;
4404         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4405                 goto out;
4406         status = decode_getfattr(&xdr, res->fattr, res->server);
4407 out:
4408         return status;
4409 }
4410
4411 /*
4412  * Decode LOOKUP_ROOT response
4413  */
4414 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4415 {
4416         struct xdr_stream xdr;
4417         struct compound_hdr hdr;
4418         int status;
4419
4420         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4421         status = decode_compound_hdr(&xdr, &hdr);
4422         if (status)
4423                 goto out;
4424         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4425         if (status)
4426                 goto out;
4427         if ((status = decode_putrootfh(&xdr)) != 0)
4428                 goto out;
4429         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4430                 status = decode_getfattr(&xdr, res->fattr, res->server);
4431 out:
4432         return status;
4433 }
4434
4435 /*
4436  * Decode REMOVE response
4437  */
4438 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4439 {
4440         struct xdr_stream xdr;
4441         struct compound_hdr hdr;
4442         int status;
4443
4444         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4445         status = decode_compound_hdr(&xdr, &hdr);
4446         if (status)
4447                 goto out;
4448         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4449         if (status)
4450                 goto out;
4451         if ((status = decode_putfh(&xdr)) != 0)
4452                 goto out;
4453         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4454                 goto out;
4455         decode_getfattr(&xdr, &res->dir_attr, res->server);
4456 out:
4457         return status;
4458 }
4459
4460 /*
4461  * Decode RENAME response
4462  */
4463 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4464 {
4465         struct xdr_stream xdr;
4466         struct compound_hdr hdr;
4467         int status;
4468
4469         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4470         status = decode_compound_hdr(&xdr, &hdr);
4471         if (status)
4472                 goto out;
4473         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4474         if (status)
4475                 goto out;
4476         if ((status = decode_putfh(&xdr)) != 0)
4477                 goto out;
4478         if ((status = decode_savefh(&xdr)) != 0)
4479                 goto out;
4480         if ((status = decode_putfh(&xdr)) != 0)
4481                 goto out;
4482         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4483                 goto out;
4484         /* Current FH is target directory */
4485         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4486                 goto out;
4487         if ((status = decode_restorefh(&xdr)) != 0)
4488                 goto out;
4489         decode_getfattr(&xdr, res->old_fattr, res->server);
4490 out:
4491         return status;
4492 }
4493
4494 /*
4495  * Decode LINK response
4496  */
4497 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4498 {
4499         struct xdr_stream xdr;
4500         struct compound_hdr hdr;
4501         int status;
4502
4503         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4504         status = decode_compound_hdr(&xdr, &hdr);
4505         if (status)
4506                 goto out;
4507         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4508         if (status)
4509                 goto out;
4510         if ((status = decode_putfh(&xdr)) != 0)
4511                 goto out;
4512         if ((status = decode_savefh(&xdr)) != 0)
4513                 goto out;
4514         if ((status = decode_putfh(&xdr)) != 0)
4515                 goto out;
4516         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4517                 goto out;
4518         /*
4519          * Note order: OP_LINK leaves the directory as the current
4520          *             filehandle.
4521          */
4522         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4523                 goto out;
4524         if ((status = decode_restorefh(&xdr)) != 0)
4525                 goto out;
4526         decode_getfattr(&xdr, res->fattr, res->server);
4527 out:
4528         return status;
4529 }
4530
4531 /*
4532  * Decode CREATE response
4533  */
4534 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4535 {
4536         struct xdr_stream xdr;
4537         struct compound_hdr hdr;
4538         int status;
4539
4540         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4541         status = decode_compound_hdr(&xdr, &hdr);
4542         if (status)
4543                 goto out;
4544         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4545         if (status)
4546                 goto out;
4547         if ((status = decode_putfh(&xdr)) != 0)
4548                 goto out;
4549         if ((status = decode_savefh(&xdr)) != 0)
4550                 goto out;
4551         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4552                 goto out;
4553         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4554                 goto out;
4555         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4556                 goto out;
4557         if ((status = decode_restorefh(&xdr)) != 0)
4558                 goto out;
4559         decode_getfattr(&xdr, res->dir_fattr, res->server);
4560 out:
4561         return status;
4562 }
4563
4564 /*
4565  * Decode SYMLINK response
4566  */
4567 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4568 {
4569         return nfs4_xdr_dec_create(rqstp, p, res);
4570 }
4571
4572 /*
4573  * Decode GETATTR response
4574  */
4575 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4576 {
4577         struct xdr_stream xdr;
4578         struct compound_hdr hdr;
4579         int status;
4580
4581         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4582         status = decode_compound_hdr(&xdr, &hdr);
4583         if (status)
4584                 goto out;
4585         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4586         if (status)
4587                 goto out;
4588         status = decode_putfh(&xdr);
4589         if (status)
4590                 goto out;
4591         status = decode_getfattr(&xdr, res->fattr, res->server);
4592 out:
4593         return status;
4594 }
4595
4596 /*
4597  * Encode an SETACL request
4598  */
4599 static int
4600 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4601 {
4602         struct xdr_stream xdr;
4603         struct compound_hdr hdr = {
4604                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4605         };
4606         int status;
4607
4608         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4609         encode_compound_hdr(&xdr, req, &hdr);
4610         encode_sequence(&xdr, &args->seq_args, &hdr);
4611         encode_putfh(&xdr, args->fh, &hdr);
4612         status = encode_setacl(&xdr, args, &hdr);
4613         encode_nops(&hdr);
4614         return status;
4615 }
4616
4617 /*
4618  * Decode SETACL response
4619  */
4620 static int
4621 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4622                     struct nfs_setaclres *res)
4623 {
4624         struct xdr_stream xdr;
4625         struct compound_hdr hdr;
4626         int status;
4627
4628         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4629         status = decode_compound_hdr(&xdr, &hdr);
4630         if (status)
4631                 goto out;
4632         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4633         if (status)
4634                 goto out;
4635         status = decode_putfh(&xdr);
4636         if (status)
4637                 goto out;
4638         status = decode_setattr(&xdr);
4639 out:
4640         return status;
4641 }
4642
4643 /*
4644  * Decode GETACL response
4645  */
4646 static int
4647 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4648                     struct nfs_getaclres *res)
4649 {
4650         struct xdr_stream xdr;
4651         struct compound_hdr hdr;
4652         int status;
4653
4654         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4655         status = decode_compound_hdr(&xdr, &hdr);
4656         if (status)
4657                 goto out;
4658         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4659         if (status)
4660                 goto out;
4661         status = decode_putfh(&xdr);
4662         if (status)
4663                 goto out;
4664         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4665
4666 out:
4667         return status;
4668 }
4669
4670 /*
4671  * Decode CLOSE response
4672  */
4673 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4674 {
4675         struct xdr_stream xdr;
4676         struct compound_hdr hdr;
4677         int status;
4678
4679         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4680         status = decode_compound_hdr(&xdr, &hdr);
4681         if (status)
4682                 goto out;
4683         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4684         if (status)
4685                 goto out;
4686         status = decode_putfh(&xdr);
4687         if (status)
4688                 goto out;
4689         status = decode_close(&xdr, res);
4690         if (status != 0)
4691                 goto out;
4692         /*
4693          * Note: Server may do delete on close for this file
4694          *      in which case the getattr call will fail with
4695          *      an ESTALE error. Shouldn't be a problem,
4696          *      though, since fattr->valid will remain unset.
4697          */
4698         decode_getfattr(&xdr, res->fattr, res->server);
4699 out:
4700         return status;
4701 }
4702
4703 /*
4704  * Decode OPEN response
4705  */
4706 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4707 {
4708         struct xdr_stream xdr;
4709         struct compound_hdr hdr;
4710         int status;
4711
4712         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4713         status = decode_compound_hdr(&xdr, &hdr);
4714         if (status)
4715                 goto out;
4716         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4717         if (status)
4718                 goto out;
4719         status = decode_putfh(&xdr);
4720         if (status)
4721                 goto out;
4722         status = decode_savefh(&xdr);
4723         if (status)
4724                 goto out;
4725         status = decode_open(&xdr, res);
4726         if (status)
4727                 goto out;
4728         if (decode_getfh(&xdr, &res->fh) != 0)
4729                 goto out;
4730         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4731                 goto out;
4732         if (decode_restorefh(&xdr) != 0)
4733                 goto out;
4734         decode_getfattr(&xdr, res->dir_attr, res->server);
4735 out:
4736         return status;
4737 }
4738
4739 /*
4740  * Decode OPEN_CONFIRM response
4741  */
4742 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4743 {
4744         struct xdr_stream xdr;
4745         struct compound_hdr hdr;
4746         int status;
4747
4748         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4749         status = decode_compound_hdr(&xdr, &hdr);
4750         if (status)
4751                 goto out;
4752         status = decode_putfh(&xdr);
4753         if (status)
4754                 goto out;
4755         status = decode_open_confirm(&xdr, res);
4756 out:
4757         return status;
4758 }
4759
4760 /*
4761  * Decode OPEN response
4762  */
4763 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4764 {
4765         struct xdr_stream xdr;
4766         struct compound_hdr hdr;
4767         int status;
4768
4769         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4770         status = decode_compound_hdr(&xdr, &hdr);
4771         if (status)
4772                 goto out;
4773         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4774         if (status)
4775                 goto out;
4776         status = decode_putfh(&xdr);
4777         if (status)
4778                 goto out;
4779         status = decode_open(&xdr, res);
4780         if (status)
4781                 goto out;
4782         decode_getfattr(&xdr, res->f_attr, res->server);
4783 out:
4784         return status;
4785 }
4786
4787 /*
4788  * Decode SETATTR response
4789  */
4790 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4791 {
4792         struct xdr_stream xdr;
4793         struct compound_hdr hdr;
4794         int status;
4795
4796         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4797         status = decode_compound_hdr(&xdr, &hdr);
4798         if (status)
4799                 goto out;
4800         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4801         if (status)
4802                 goto out;
4803         status = decode_putfh(&xdr);
4804         if (status)
4805                 goto out;
4806         status = decode_setattr(&xdr);
4807         if (status)
4808                 goto out;
4809         decode_getfattr(&xdr, res->fattr, res->server);
4810 out:
4811         return status;
4812 }
4813
4814 /*
4815  * Decode LOCK response
4816  */
4817 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4818 {
4819         struct xdr_stream xdr;
4820         struct compound_hdr hdr;
4821         int status;
4822
4823         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4824         status = decode_compound_hdr(&xdr, &hdr);
4825         if (status)
4826                 goto out;
4827         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4828         if (status)
4829                 goto out;
4830         status = decode_putfh(&xdr);
4831         if (status)
4832                 goto out;
4833         status = decode_lock(&xdr, res);
4834 out:
4835         return status;
4836 }
4837
4838 /*
4839  * Decode LOCKT response
4840  */
4841 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4842 {
4843         struct xdr_stream xdr;
4844         struct compound_hdr hdr;
4845         int status;
4846
4847         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4848         status = decode_compound_hdr(&xdr, &hdr);
4849         if (status)
4850                 goto out;
4851         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4852         if (status)
4853                 goto out;
4854         status = decode_putfh(&xdr);
4855         if (status)
4856                 goto out;
4857         status = decode_lockt(&xdr, res);
4858 out:
4859         return status;
4860 }
4861
4862 /*
4863  * Decode LOCKU response
4864  */
4865 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4866 {
4867         struct xdr_stream xdr;
4868         struct compound_hdr hdr;
4869         int status;
4870
4871         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4872         status = decode_compound_hdr(&xdr, &hdr);
4873         if (status)
4874                 goto out;
4875         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4876         if (status)
4877                 goto out;
4878         status = decode_putfh(&xdr);
4879         if (status)
4880                 goto out;
4881         status = decode_locku(&xdr, res);
4882 out:
4883         return status;
4884 }
4885
4886 /*
4887  * Decode READLINK response
4888  */
4889 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4890                                  struct nfs4_readlink_res *res)
4891 {
4892         struct xdr_stream xdr;
4893         struct compound_hdr hdr;
4894         int status;
4895
4896         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4897         status = decode_compound_hdr(&xdr, &hdr);
4898         if (status)
4899                 goto out;
4900         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4901         if (status)
4902                 goto out;
4903         status = decode_putfh(&xdr);
4904         if (status)
4905                 goto out;
4906         status = decode_readlink(&xdr, rqstp);
4907 out:
4908         return status;
4909 }
4910
4911 /*
4912  * Decode READDIR response
4913  */
4914 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4915 {
4916         struct xdr_stream xdr;
4917         struct compound_hdr hdr;
4918         int status;
4919
4920         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4921         status = decode_compound_hdr(&xdr, &hdr);
4922         if (status)
4923                 goto out;
4924         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4925         if (status)
4926                 goto out;
4927         status = decode_putfh(&xdr);
4928         if (status)
4929                 goto out;
4930         status = decode_readdir(&xdr, rqstp, res);
4931 out:
4932         return status;
4933 }
4934
4935 /*
4936  * Decode Read response
4937  */
4938 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4939 {
4940         struct xdr_stream xdr;
4941         struct compound_hdr hdr;
4942         int status;
4943
4944         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4945         status = decode_compound_hdr(&xdr, &hdr);
4946         if (status)
4947                 goto out;
4948         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4949         if (status)
4950                 goto out;
4951         status = decode_putfh(&xdr);
4952         if (status)
4953                 goto out;
4954         status = decode_read(&xdr, rqstp, res);
4955         if (!status)
4956                 status = res->count;
4957 out:
4958         return status;
4959 }
4960
4961 /*
4962  * Decode WRITE response
4963  */
4964 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4965 {
4966         struct xdr_stream xdr;
4967         struct compound_hdr hdr;
4968         int status;
4969
4970         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4971         status = decode_compound_hdr(&xdr, &hdr);
4972         if (status)
4973                 goto out;
4974         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4975         if (status)
4976                 goto out;
4977         status = decode_putfh(&xdr);
4978         if (status)
4979                 goto out;
4980         status = decode_write(&xdr, res);
4981         if (status)
4982                 goto out;
4983         decode_getfattr(&xdr, res->fattr, res->server);
4984         if (!status)
4985                 status = res->count;
4986 out:
4987         return status;
4988 }
4989
4990 /*
4991  * Decode COMMIT response
4992  */
4993 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4994 {
4995         struct xdr_stream xdr;
4996         struct compound_hdr hdr;
4997         int status;
4998
4999         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5000         status = decode_compound_hdr(&xdr, &hdr);
5001         if (status)
5002                 goto out;
5003         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5004         if (status)
5005                 goto out;
5006         status = decode_putfh(&xdr);
5007         if (status)
5008                 goto out;
5009         status = decode_commit(&xdr, res);
5010         if (status)
5011                 goto out;
5012         decode_getfattr(&xdr, res->fattr, res->server);
5013 out:
5014         return status;
5015 }
5016
5017 /*
5018  * FSINFO request
5019  */
5020 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5021                                struct nfs4_fsinfo_res *res)
5022 {
5023         struct xdr_stream xdr;
5024         struct compound_hdr hdr;
5025         int status;
5026
5027         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5028         status = decode_compound_hdr(&xdr, &hdr);
5029         if (!status)
5030                 status = decode_sequence(&xdr, &res->seq_res, req);
5031         if (!status)
5032                 status = decode_putfh(&xdr);
5033         if (!status)
5034                 status = decode_fsinfo(&xdr, res->fsinfo);
5035         return status;
5036 }
5037
5038 /*
5039  * PATHCONF request
5040  */
5041 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5042                                  struct nfs4_pathconf_res *res)
5043 {
5044         struct xdr_stream xdr;
5045         struct compound_hdr hdr;
5046         int status;
5047
5048         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5049         status = decode_compound_hdr(&xdr, &hdr);
5050         if (!status)
5051                 status = decode_sequence(&xdr, &res->seq_res, req);
5052         if (!status)
5053                 status = decode_putfh(&xdr);
5054         if (!status)
5055                 status = decode_pathconf(&xdr, res->pathconf);
5056         return status;
5057 }
5058
5059 /*
5060  * STATFS request
5061  */
5062 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5063                                struct nfs4_statfs_res *res)
5064 {
5065         struct xdr_stream xdr;
5066         struct compound_hdr hdr;
5067         int status;
5068
5069         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5070         status = decode_compound_hdr(&xdr, &hdr);
5071         if (!status)
5072                 status = decode_sequence(&xdr, &res->seq_res, req);
5073         if (!status)
5074                 status = decode_putfh(&xdr);
5075         if (!status)
5076                 status = decode_statfs(&xdr, res->fsstat);
5077         return status;
5078 }
5079
5080 /*
5081  * GETATTR_BITMAP request
5082  */
5083 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5084 {
5085         struct xdr_stream xdr;
5086         struct compound_hdr hdr;
5087         int status;
5088
5089         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5090         status = decode_compound_hdr(&xdr, &hdr);
5091         if (status)
5092                 goto out;
5093         status = decode_sequence(&xdr, &res->seq_res, req);
5094         if (status)
5095                 goto out;
5096         if ((status = decode_putfh(&xdr)) != 0)
5097                 goto out;
5098         status = decode_server_caps(&xdr, res);
5099 out:
5100         return status;
5101 }
5102
5103 /*
5104  * Decode RENEW response
5105  */
5106 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5107 {
5108         struct xdr_stream xdr;
5109         struct compound_hdr hdr;
5110         int status;
5111
5112         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5113         status = decode_compound_hdr(&xdr, &hdr);
5114         if (!status)
5115                 status = decode_renew(&xdr);
5116         return status;
5117 }
5118
5119 /*
5120  * a SETCLIENTID request
5121  */
5122 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5123                 struct nfs_client *clp)
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(&xdr, clp);
5133         return status;
5134 }
5135
5136 /*
5137  * a SETCLIENTID_CONFIRM request
5138  */
5139 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5140 {
5141         struct xdr_stream xdr;
5142         struct compound_hdr hdr;
5143         int status;
5144
5145         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5146         status = decode_compound_hdr(&xdr, &hdr);
5147         if (!status)
5148                 status = decode_setclientid_confirm(&xdr);
5149         if (!status)
5150                 status = decode_putrootfh(&xdr);
5151         if (!status)
5152                 status = decode_fsinfo(&xdr, fsinfo);
5153         return status;
5154 }
5155
5156 /*
5157  * DELEGRETURN request
5158  */
5159 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5160 {
5161         struct xdr_stream xdr;
5162         struct compound_hdr hdr;
5163         int status;
5164
5165         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5166         status = decode_compound_hdr(&xdr, &hdr);
5167         if (status)
5168                 goto out;
5169         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5170         if (status)
5171                 goto out;
5172         status = decode_putfh(&xdr);
5173         if (status != 0)
5174                 goto out;
5175         status = decode_delegreturn(&xdr);
5176         decode_getfattr(&xdr, res->fattr, res->server);
5177 out:
5178         return status;
5179 }
5180
5181 /*
5182  * FS_LOCATIONS request
5183  */
5184 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5185                                      struct nfs4_fs_locations_res *res)
5186 {
5187         struct xdr_stream xdr;
5188         struct compound_hdr hdr;
5189         int status;
5190
5191         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5192         status = decode_compound_hdr(&xdr, &hdr);
5193         if (status)
5194                 goto out;
5195         status = decode_sequence(&xdr, &res->seq_res, req);
5196         if (status)
5197                 goto out;
5198         if ((status = decode_putfh(&xdr)) != 0)
5199                 goto out;
5200         if ((status = decode_lookup(&xdr)) != 0)
5201                 goto out;
5202         xdr_enter_page(&xdr, PAGE_SIZE);
5203         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5204                                  res->fs_locations->server);
5205 out:
5206         return status;
5207 }
5208
5209 #if defined(CONFIG_NFS_V4_1)
5210 /*
5211  * EXCHANGE_ID request
5212  */
5213 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5214                                     void *res)
5215 {
5216         struct xdr_stream xdr;
5217         struct compound_hdr hdr;
5218         int status;
5219
5220         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5221         status = decode_compound_hdr(&xdr, &hdr);
5222         if (!status)
5223                 status = decode_exchange_id(&xdr, res);
5224         return status;
5225 }
5226
5227 /*
5228  * a CREATE_SESSION request
5229  */
5230 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5231                                        struct nfs41_create_session_res *res)
5232 {
5233         struct xdr_stream xdr;
5234         struct compound_hdr hdr;
5235         int status;
5236
5237         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5238         status = decode_compound_hdr(&xdr, &hdr);
5239         if (!status)
5240                 status = decode_create_session(&xdr, res);
5241         return status;
5242 }
5243
5244 /*
5245  * a DESTROY_SESSION request
5246  */
5247 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5248                                         void *dummy)
5249 {
5250         struct xdr_stream xdr;
5251         struct compound_hdr hdr;
5252         int status;
5253
5254         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5255         status = decode_compound_hdr(&xdr, &hdr);
5256         if (!status)
5257                 status = decode_destroy_session(&xdr, dummy);
5258         return status;
5259 }
5260
5261 /*
5262  * a SEQUENCE request
5263  */
5264 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5265                                  struct nfs4_sequence_res *res)
5266 {
5267         struct xdr_stream xdr;
5268         struct compound_hdr hdr;
5269         int status;
5270
5271         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5272         status = decode_compound_hdr(&xdr, &hdr);
5273         if (!status)
5274                 status = decode_sequence(&xdr, res, rqstp);
5275         return status;
5276 }
5277
5278 /*
5279  * a GET_LEASE_TIME request
5280  */
5281 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5282                                        struct nfs4_get_lease_time_res *res)
5283 {
5284         struct xdr_stream xdr;
5285         struct compound_hdr hdr;
5286         int status;
5287
5288         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5289         status = decode_compound_hdr(&xdr, &hdr);
5290         if (!status)
5291                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5292         if (!status)
5293                 status = decode_putrootfh(&xdr);
5294         if (!status)
5295                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5296         return status;
5297 }
5298 #endif /* CONFIG_NFS_V4_1 */
5299
5300 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5301 {
5302         uint32_t bitmap[2] = {0};
5303         uint32_t len;
5304
5305         if (!*p++) {
5306                 if (!*p)
5307                         return ERR_PTR(-EAGAIN);
5308                 entry->eof = 1;
5309                 return ERR_PTR(-EBADCOOKIE);
5310         }
5311
5312         entry->prev_cookie = entry->cookie;
5313         p = xdr_decode_hyper(p, &entry->cookie);
5314         entry->len = ntohl(*p++);
5315         entry->name = (const char *) p;
5316         p += XDR_QUADLEN(entry->len);
5317
5318         /*
5319          * In case the server doesn't return an inode number,
5320          * we fake one here.  (We don't use inode number 0,
5321          * since glibc seems to choke on it...)
5322          */
5323         entry->ino = 1;
5324
5325         len = ntohl(*p++);              /* bitmap length */
5326         if (len-- > 0) {
5327                 bitmap[0] = ntohl(*p++);
5328                 if (len-- > 0) {
5329                         bitmap[1] = ntohl(*p++);
5330                         p += len;
5331                 }
5332         }
5333         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5334         if (len > 0) {
5335                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5336                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5337                         /* Ignore the return value of rdattr_error for now */
5338                         p++;
5339                         len--;
5340                 }
5341                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5342                         xdr_decode_hyper(p, &entry->ino);
5343                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5344                         xdr_decode_hyper(p, &entry->ino);
5345                 p += len;
5346         }
5347
5348         entry->eof = !p[0] && p[1];
5349         return p;
5350 }
5351
5352 /*
5353  * We need to translate between nfs status return values and
5354  * the local errno values which may not be the same.
5355  */
5356 static struct {
5357         int stat;
5358         int errno;
5359 } nfs_errtbl[] = {
5360         { NFS4_OK,              0               },
5361         { NFS4ERR_PERM,         -EPERM          },
5362         { NFS4ERR_NOENT,        -ENOENT         },
5363         { NFS4ERR_IO,           -errno_NFSERR_IO},
5364         { NFS4ERR_NXIO,         -ENXIO          },
5365         { NFS4ERR_ACCESS,       -EACCES         },
5366         { NFS4ERR_EXIST,        -EEXIST         },
5367         { NFS4ERR_XDEV,         -EXDEV          },
5368         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5369         { NFS4ERR_ISDIR,        -EISDIR         },
5370         { NFS4ERR_INVAL,        -EINVAL         },
5371         { NFS4ERR_FBIG,         -EFBIG          },
5372         { NFS4ERR_NOSPC,        -ENOSPC         },
5373         { NFS4ERR_ROFS,         -EROFS          },
5374         { NFS4ERR_MLINK,        -EMLINK         },
5375         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5376         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5377         { NFS4ERR_DQUOT,        -EDQUOT         },
5378         { NFS4ERR_STALE,        -ESTALE         },
5379         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5380         { NFS4ERR_BADOWNER,     -EINVAL         },
5381         { NFS4ERR_BADNAME,      -EINVAL         },
5382         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5383         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5384         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5385         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5386         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5387         { NFS4ERR_LOCKED,       -EAGAIN         },
5388         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5389         { NFS4ERR_SYMLINK,      -ELOOP          },
5390         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5391         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5392         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5393                                                     * to be handled by a
5394                                                     * middle-layer.
5395                                                     */
5396         { -1,                   -EIO            }
5397 };
5398
5399 /*
5400  * Convert an NFS error code to a local one.
5401  * This one is used jointly by NFSv2 and NFSv3.
5402  */
5403 static int
5404 nfs4_stat_to_errno(int stat)
5405 {
5406         int i;
5407         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5408                 if (nfs_errtbl[i].stat == stat)
5409                         return nfs_errtbl[i].errno;
5410         }
5411         if (stat <= 10000 || stat > 10100) {
5412                 /* The server is looney tunes. */
5413                 return -ESERVERFAULT;
5414         }
5415         /* If we cannot translate the error, the recovery routines should
5416          * handle it.
5417          * Note: remaining NFSv4 error codes have values > 10000, so should
5418          * not conflict with native Linux error codes.
5419          */
5420         return -stat;
5421 }
5422
5423 #define PROC(proc, argtype, restype)                            \
5424 [NFSPROC4_CLNT_##proc] = {                                      \
5425         .p_proc   = NFSPROC4_COMPOUND,                          \
5426         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5427         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5428         .p_arglen = NFS4_##argtype##_sz,                        \
5429         .p_replen = NFS4_##restype##_sz,                        \
5430         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5431         .p_name   = #proc,                                      \
5432 }
5433
5434 struct rpc_procinfo     nfs4_procedures[] = {
5435   PROC(READ,            enc_read,       dec_read),
5436   PROC(WRITE,           enc_write,      dec_write),
5437   PROC(COMMIT,          enc_commit,     dec_commit),
5438   PROC(OPEN,            enc_open,       dec_open),
5439   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5440   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5441   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5442   PROC(CLOSE,           enc_close,      dec_close),
5443   PROC(SETATTR,         enc_setattr,    dec_setattr),
5444   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5445   PROC(RENEW,           enc_renew,      dec_renew),
5446   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5447   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5448   PROC(LOCK,            enc_lock,       dec_lock),
5449   PROC(LOCKT,           enc_lockt,      dec_lockt),
5450   PROC(LOCKU,           enc_locku,      dec_locku),
5451   PROC(ACCESS,          enc_access,     dec_access),
5452   PROC(GETATTR,         enc_getattr,    dec_getattr),
5453   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5454   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5455   PROC(REMOVE,          enc_remove,     dec_remove),
5456   PROC(RENAME,          enc_rename,     dec_rename),
5457   PROC(LINK,            enc_link,       dec_link),
5458   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5459   PROC(CREATE,          enc_create,     dec_create),
5460   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5461   PROC(STATFS,          enc_statfs,     dec_statfs),
5462   PROC(READLINK,        enc_readlink,   dec_readlink),
5463   PROC(READDIR,         enc_readdir,    dec_readdir),
5464   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5465   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5466   PROC(GETACL,          enc_getacl,     dec_getacl),
5467   PROC(SETACL,          enc_setacl,     dec_setacl),
5468   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5469 #if defined(CONFIG_NFS_V4_1)
5470   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5471   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5472   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5473   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5474   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5475 #endif /* CONFIG_NFS_V4_1 */
5476 };
5477
5478 struct rpc_version              nfs_version4 = {
5479         .number                 = 4,
5480         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5481         .procs                  = nfs4_procedures
5482 };
5483
5484 /*
5485  * Local variables:
5486  *  c-basic-offset: 8
5487  * End:
5488  */