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   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 250
 251 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 252                                 encode_verifier_maxsz + \
 253                                 1 /* co_ownerid.len */ + \
 254                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 255                                 1 /* flags */ + \
 256                                 1 /* spa_how */ + \
 257                                 0 /* SP4_NONE (for now) */ + \
 258                                 1 /* zero implemetation id array */)
 259 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 260                                 2 /* eir_clientid */ + \
 261                                 1 /* eir_sequenceid */ + \
 262                                 1 /* eir_flags */ + \
 263                                 1 /* spr_how */ + \
 264                                 0 /* SP4_NONE (for now) */ + \
 265                                 2 /* eir_server_owner.so_minor_id */ + \
 266                                 /* eir_server_owner.so_major_id<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 /* eir_server_scope<> */ \
 269                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 270                                 1 /* eir_server_impl_id array length */ + \
 271                                 0 /* ignored eir_server_impl_id contents */)
 272 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 273 #define decode_channel_attrs_maxsz  (6 + \
 274                                      1 /* ca_rdma_ird.len */ + \
 275                                      1 /* ca_rdma_ird */)
 276 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 277                                      2 /* csa_clientid */ + \
 278                                      1 /* csa_sequence */ + \
 279                                      1 /* csa_flags */ + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      1 /* csa_cb_program */ + \
 283                                      1 /* csa_sec_parms.len (1) */ + \
 284                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 285                                      1 /* stamp */ + \
 286                                      1 /* machinename.len */ + \
 287                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 288                                      1 /* uid */ + \
 289                                      1 /* gid */ + \
 290                                      1 /* gids.len (0) */)
 291 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 292                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 293                                      1 /* csr_sequence */ + \
 294                                      1 /* csr_flags */ + \
 295                                      decode_channel_attrs_maxsz + \
 296                                      decode_channel_attrs_maxsz)
 297 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 298 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 299 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 300                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 301 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 302                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 303 #else /* CONFIG_NFS_V4_1 */
 304 #define encode_sequence_maxsz   0
 305 #define decode_sequence_maxsz   0
 306 #endif /* CONFIG_NFS_V4_1 */
 307
 308 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 310 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 311                                 encode_sequence_maxsz + \
 312                                 encode_putfh_maxsz + \
 313                                 encode_read_maxsz)
 314 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 315                                 decode_sequence_maxsz + \
 316                                 decode_putfh_maxsz + \
 317                                 decode_read_maxsz)
 318 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 319                                 encode_sequence_maxsz + \
 320                                 encode_putfh_maxsz + \
 321                                 encode_readlink_maxsz)
 322 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 323                                 decode_sequence_maxsz + \
 324                                 decode_putfh_maxsz + \
 325                                 decode_readlink_maxsz)
 326 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 327                                 encode_sequence_maxsz + \
 328                                 encode_putfh_maxsz + \
 329                                 encode_readdir_maxsz)
 330 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 331                                 decode_sequence_maxsz + \
 332                                 decode_putfh_maxsz + \
 333                                 decode_readdir_maxsz)
 334 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_write_maxsz + \
 338                                 encode_getattr_maxsz)
 339 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 340                                 decode_sequence_maxsz + \
 341                                 decode_putfh_maxsz + \
 342                                 decode_write_maxsz + \
 343                                 decode_getattr_maxsz)
 344 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_commit_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_commit_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_savefh_maxsz + \
 358                                 encode_open_maxsz + \
 359                                 encode_getfh_maxsz + \
 360                                 encode_getattr_maxsz + \
 361                                 encode_restorefh_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_savefh_maxsz + \
 367                                 decode_open_maxsz + \
 368                                 decode_getfh_maxsz + \
 369                                 decode_getattr_maxsz + \
 370                                 decode_restorefh_maxsz + \
 371                                 decode_getattr_maxsz)
 372 #define NFS4_enc_open_confirm_sz \
 373                                 (compound_encode_hdr_maxsz + \
 374                                  encode_putfh_maxsz + \
 375                                  encode_open_confirm_maxsz)
 376 #define NFS4_dec_open_confirm_sz \
 377                                 (compound_decode_hdr_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_open_confirm_maxsz)
 380 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 381                                         encode_sequence_maxsz + \
 382                                         encode_putfh_maxsz + \
 383                                         encode_open_maxsz + \
 384                                         encode_getattr_maxsz)
 385 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 386                                         decode_sequence_maxsz + \
 387                                         decode_putfh_maxsz + \
 388                                         decode_open_maxsz + \
 389                                         decode_getattr_maxsz)
 390 #define NFS4_enc_open_downgrade_sz \
 391                                 (compound_encode_hdr_maxsz + \
 392                                  encode_sequence_maxsz + \
 393                                  encode_putfh_maxsz + \
 394                                  encode_open_downgrade_maxsz + \
 395                                  encode_getattr_maxsz)
 396 #define NFS4_dec_open_downgrade_sz \
 397                                 (compound_decode_hdr_maxsz + \
 398                                  decode_sequence_maxsz + \
 399                                  decode_putfh_maxsz + \
 400                                  decode_open_downgrade_maxsz + \
 401                                  decode_getattr_maxsz)
 402 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 403                                  encode_sequence_maxsz + \
 404                                  encode_putfh_maxsz + \
 405                                  encode_close_maxsz + \
 406                                  encode_getattr_maxsz)
 407 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_close_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_setattr_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_setattr_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 423                                 encode_sequence_maxsz + \
 424                                 encode_putfh_maxsz + \
 425                                 encode_fsinfo_maxsz)
 426 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 427                                 decode_sequence_maxsz + \
 428                                 decode_putfh_maxsz + \
 429                                 decode_fsinfo_maxsz)
 430 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 431                                 encode_renew_maxsz)
 432 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 433                                 decode_renew_maxsz)
 434 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 435                                 encode_setclientid_maxsz)
 436 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 437                                 decode_setclientid_maxsz)
 438 #define NFS4_enc_setclientid_confirm_sz \
 439                                 (compound_encode_hdr_maxsz + \
 440                                 encode_setclientid_confirm_maxsz + \
 441                                 encode_putrootfh_maxsz + \
 442                                 encode_fsinfo_maxsz)
 443 #define NFS4_dec_setclientid_confirm_sz \
 444                                 (compound_decode_hdr_maxsz + \
 445                                 decode_setclientid_confirm_maxsz + \
 446                                 decode_putrootfh_maxsz + \
 447                                 decode_fsinfo_maxsz)
 448 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 449                                 encode_sequence_maxsz + \
 450                                 encode_putfh_maxsz + \
 451                                 encode_lock_maxsz)
 452 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 453                                 decode_sequence_maxsz + \
 454                                 decode_putfh_maxsz + \
 455                                 decode_lock_maxsz)
 456 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 457                                 encode_sequence_maxsz + \
 458                                 encode_putfh_maxsz + \
 459                                 encode_lockt_maxsz)
 460 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 461                                  decode_sequence_maxsz + \
 462                                  decode_putfh_maxsz + \
 463                                  decode_lockt_maxsz)
 464 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 465                                 encode_sequence_maxsz + \
 466                                 encode_putfh_maxsz + \
 467                                 encode_locku_maxsz)
 468 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_sequence_maxsz + \
 470                                 decode_putfh_maxsz + \
 471                                 decode_locku_maxsz)
 472 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_access_maxsz + \
 476                                 encode_getattr_maxsz)
 477 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 478                                 decode_sequence_maxsz + \
 479                                 decode_putfh_maxsz + \
 480                                 decode_access_maxsz + \
 481                                 decode_getattr_maxsz)
 482 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 483                                 encode_sequence_maxsz + \
 484                                 encode_putfh_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_getattr_maxsz)
 490 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 491                                 encode_sequence_maxsz + \
 492                                 encode_putfh_maxsz + \
 493                                 encode_lookup_maxsz + \
 494                                 encode_getattr_maxsz + \
 495                                 encode_getfh_maxsz)
 496 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 497                                 decode_sequence_maxsz + \
 498                                 decode_putfh_maxsz + \
 499                                 decode_lookup_maxsz + \
 500                                 decode_getattr_maxsz + \
 501                                 decode_getfh_maxsz)
 502 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putrootfh_maxsz + \
 505                                 encode_getattr_maxsz + \
 506                                 encode_getfh_maxsz)
 507 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putrootfh_maxsz + \
 510                                 decode_getattr_maxsz + \
 511                                 decode_getfh_maxsz)
 512 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_remove_maxsz + \
 516                                 encode_getattr_maxsz)
 517 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 518                                 decode_sequence_maxsz + \
 519                                 decode_putfh_maxsz + \
 520                                 decode_remove_maxsz + \
 521                                 decode_getattr_maxsz)
 522 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 523                                 encode_sequence_maxsz + \
 524                                 encode_putfh_maxsz + \
 525                                 encode_savefh_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_rename_maxsz + \
 528                                 encode_getattr_maxsz + \
 529                                 encode_restorefh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_savefh_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_rename_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_restorefh_maxsz + \
 539                                 decode_getattr_maxsz)
 540 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 541                                 encode_sequence_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_savefh_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_link_maxsz + \
 546                                 decode_getattr_maxsz + \
 547                                 encode_restorefh_maxsz + \
 548                                 decode_getattr_maxsz)
 549 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_savefh_maxsz + \
 553                                 decode_putfh_maxsz + \
 554                                 decode_link_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_restorefh_maxsz + \
 557                                 decode_getattr_maxsz)
 558 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 559                                 encode_sequence_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_symlink_maxsz + \
 562                                 encode_getattr_maxsz + \
 563                                 encode_getfh_maxsz)
 564 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 565                                 decode_sequence_maxsz + \
 566                                 decode_putfh_maxsz + \
 567                                 decode_symlink_maxsz + \
 568                                 decode_getattr_maxsz + \
 569                                 decode_getfh_maxsz)
 570 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_create_maxsz + \
 575                                 encode_getfh_maxsz + \
 576                                 encode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 encode_getattr_maxsz)
 579 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_create_maxsz + \
 584                                 decode_getfh_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_getattr_maxsz)
 592 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 593                                 decode_sequence_maxsz + \
 594                                 decode_putfh_maxsz + \
 595                                 decode_getattr_maxsz)
 596 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 597                                 encode_sequence_maxsz + \
 598                                 encode_putfh_maxsz + \
 599                                 encode_statfs_maxsz)
 600 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 601                                 decode_sequence_maxsz + \
 602                                 decode_putfh_maxsz + \
 603                                 decode_statfs_maxsz)
 604 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_delegreturn_maxsz + \
 616                                 encode_getattr_maxsz)
 617 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 618                                 decode_sequence_maxsz + \
 619                                 decode_delegreturn_maxsz + \
 620                                 decode_getattr_maxsz)
 621 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 622                                 encode_sequence_maxsz + \
 623                                 encode_putfh_maxsz + \
 624                                 encode_getacl_maxsz)
 625 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 626                                 decode_sequence_maxsz + \
 627                                 decode_putfh_maxsz + \
 628                                 decode_getacl_maxsz)
 629 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 630                                 encode_sequence_maxsz + \
 631                                 encode_putfh_maxsz + \
 632                                 encode_setacl_maxsz)
 633 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_putfh_maxsz + \
 636                                 decode_setacl_maxsz)
 637 #define NFS4_enc_fs_locations_sz \
 638                                 (compound_encode_hdr_maxsz + \
 639                                  encode_sequence_maxsz + \
 640                                  encode_putfh_maxsz + \
 641                                  encode_lookup_maxsz + \
 642                                  encode_fs_locations_maxsz)
 643 #define NFS4_dec_fs_locations_sz \
 644                                 (compound_decode_hdr_maxsz + \
 645                                  decode_sequence_maxsz + \
 646                                  decode_putfh_maxsz + \
 647                                  decode_lookup_maxsz + \
 648                                  decode_fs_locations_maxsz)
 649 #if defined(CONFIG_NFS_V4_1)
 650 #define NFS4_enc_exchange_id_sz \
 651                                 (compound_encode_hdr_maxsz + \
 652                                  encode_exchange_id_maxsz)
 653 #define NFS4_dec_exchange_id_sz \
 654                                 (compound_decode_hdr_maxsz + \
 655                                  decode_exchange_id_maxsz)
 656 #define NFS4_enc_create_session_sz \
 657                                 (compound_encode_hdr_maxsz + \
 658                                  encode_create_session_maxsz)
 659 #define NFS4_dec_create_session_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_create_session_maxsz)
 662 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 663                                          encode_destroy_session_maxsz)
 664 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 665                                          decode_destroy_session_maxsz)
 666 #define NFS4_enc_sequence_sz \
 667                                 (compound_decode_hdr_maxsz + \
 668                                  encode_sequence_maxsz)
 669 #define NFS4_dec_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_sequence_maxsz)
 672 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 673                                          encode_sequence_maxsz + \
 674                                          encode_putrootfh_maxsz + \
 675                                          encode_fsinfo_maxsz)
 676 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 677                                          decode_sequence_maxsz + \
 678                                          decode_putrootfh_maxsz + \
 679                                          decode_fsinfo_maxsz)
 680 #endif /* CONFIG_NFS_V4_1 */
 681
 682 static const umode_t nfs_type2fmt[] = {
 683         [NF4BAD] = 0,
 684         [NF4REG] = S_IFREG,
 685         [NF4DIR] = S_IFDIR,
 686         [NF4BLK] = S_IFBLK,
 687         [NF4CHR] = S_IFCHR,
 688         [NF4LNK] = S_IFLNK,
 689         [NF4SOCK] = S_IFSOCK,
 690         [NF4FIFO] = S_IFIFO,
 691         [NF4ATTRDIR] = 0,
 692         [NF4NAMEDATTR] = 0,
 693 };
 694
 695 struct compound_hdr {
 696         int32_t         status;
 697         uint32_t        nops;
 698         __be32 *        nops_p;
 699         uint32_t        taglen;
 700         char *          tag;
 701         uint32_t        replen;         /* expected reply words */
 702         u32             minorversion;
 703 };
 704
 705 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 706 {
 707         __be32 *p = xdr_reserve_space(xdr, nbytes);
 708         BUG_ON(!p);
 709         return p;
 710 }
 711
 712 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 713 {
 714         __be32 *p;
 715
 716         p = xdr_reserve_space(xdr, 4 + len);
 717         BUG_ON(p == NULL);
 718         xdr_encode_opaque(p, str, len);
 719 }
 720
 721 static void encode_compound_hdr(struct xdr_stream *xdr,
 722                                 struct rpc_rqst *req,
 723                                 struct compound_hdr *hdr)
 724 {
 725         __be32 *p;
 726         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 727
 728         /* initialize running count of expected bytes in reply.
 729          * NOTE: the replied tag SHOULD be the same is the one sent,
 730          * but this is not required as a MUST for the server to do so. */
 731         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 732
 733         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 734         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 735         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 736         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 737         *p++ = cpu_to_be32(hdr->minorversion);
 738         hdr->nops_p = p;
 739         *p = cpu_to_be32(hdr->nops);
 740 }
 741
 742 static void encode_nops(struct compound_hdr *hdr)
 743 {
 744         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 745         *hdr->nops_p = htonl(hdr->nops);
 746 }
 747
 748 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 749 {
 750         __be32 *p;
 751
 752         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 753         BUG_ON(p == NULL);
 754         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 755 }
 756
 757 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 758 {
 759         char owner_name[IDMAP_NAMESZ];
 760         char owner_group[IDMAP_NAMESZ];
 761         int owner_namelen = 0;
 762         int owner_grouplen = 0;
 763         __be32 *p;
 764         __be32 *q;
 765         int len;
 766         uint32_t bmval0 = 0;
 767         uint32_t bmval1 = 0;
 768
 769         /*
 770          * We reserve enough space to write the entire attribute buffer at once.
 771          * In the worst-case, this would be
 772          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 773          *          = 36 bytes, plus any contribution from variable-length fields
 774          *            such as owner/group.
 775          */
 776         len = 16;
 777
 778         /* Sigh */
 779         if (iap->ia_valid & ATTR_SIZE)
 780                 len += 8;
 781         if (iap->ia_valid & ATTR_MODE)
 782                 len += 4;
 783         if (iap->ia_valid & ATTR_UID) {
 784                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 785                 if (owner_namelen < 0) {
 786                         dprintk("nfs: couldn't resolve uid %d to string\n",
 787                                         iap->ia_uid);
 788                         /* XXX */
 789                         strcpy(owner_name, "nobody");
 790                         owner_namelen = sizeof("nobody") - 1;
 791                         /* goto out; */
 792                 }
 793                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 794         }
 795         if (iap->ia_valid & ATTR_GID) {
 796                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 797                 if (owner_grouplen < 0) {
 798                         dprintk("nfs: couldn't resolve gid %d to string\n",
 799                                         iap->ia_gid);
 800                         strcpy(owner_group, "nobody");
 801                         owner_grouplen = sizeof("nobody") - 1;
 802                         /* goto out; */
 803                 }
 804                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 805         }
 806         if (iap->ia_valid & ATTR_ATIME_SET)
 807                 len += 16;
 808         else if (iap->ia_valid & ATTR_ATIME)
 809                 len += 4;
 810         if (iap->ia_valid & ATTR_MTIME_SET)
 811                 len += 16;
 812         else if (iap->ia_valid & ATTR_MTIME)
 813                 len += 4;
 814         p = reserve_space(xdr, len);
 815
 816         /*
 817          * We write the bitmap length now, but leave the bitmap and the attribute
 818          * buffer length to be backfilled at the end of this routine.
 819          */
 820         *p++ = cpu_to_be32(2);
 821         q = p;
 822         p += 3;
 823
 824         if (iap->ia_valid & ATTR_SIZE) {
 825                 bmval0 |= FATTR4_WORD0_SIZE;
 826                 p = xdr_encode_hyper(p, iap->ia_size);
 827         }
 828         if (iap->ia_valid & ATTR_MODE) {
 829                 bmval1 |= FATTR4_WORD1_MODE;
 830                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 831         }
 832         if (iap->ia_valid & ATTR_UID) {
 833                 bmval1 |= FATTR4_WORD1_OWNER;
 834                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 835         }
 836         if (iap->ia_valid & ATTR_GID) {
 837                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 838                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 839         }
 840         if (iap->ia_valid & ATTR_ATIME_SET) {
 841                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 842                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 843                 *p++ = cpu_to_be32(0);
 844                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 845                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 846         }
 847         else if (iap->ia_valid & ATTR_ATIME) {
 848                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 849                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 850         }
 851         if (iap->ia_valid & ATTR_MTIME_SET) {
 852                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 853                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 854                 *p++ = cpu_to_be32(0);
 855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 856                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 857         }
 858         else if (iap->ia_valid & ATTR_MTIME) {
 859                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 860                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 861         }
 862
 863         /*
 864          * Now we backfill the bitmap and the attribute buffer length.
 865          */
 866         if (len != ((char *)p - (char *)q) + 4) {
 867                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 868                                 len, ((char *)p - (char *)q) + 4);
 869                 BUG();
 870         }
 871         len = (char *)p - (char *)q - 12;
 872         *q++ = htonl(bmval0);
 873         *q++ = htonl(bmval1);
 874         *q = htonl(len);
 875
 876 /* out: */
 877 }
 878
 879 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 880 {
 881         __be32 *p;
 882
 883         p = reserve_space(xdr, 8);
 884         *p++ = cpu_to_be32(OP_ACCESS);
 885         *p = cpu_to_be32(access);
 886         hdr->nops++;
 887         hdr->replen += decode_access_maxsz;
 888 }
 889
 890 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 891 {
 892         __be32 *p;
 893
 894         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 895         *p++ = cpu_to_be32(OP_CLOSE);
 896         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 897         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 898         hdr->nops++;
 899         hdr->replen += decode_close_maxsz;
 900 }
 901
 902 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 903 {
 904         __be32 *p;
 905
 906         p = reserve_space(xdr, 16);
 907         *p++ = cpu_to_be32(OP_COMMIT);
 908         p = xdr_encode_hyper(p, args->offset);
 909         *p = cpu_to_be32(args->count);
 910         hdr->nops++;
 911         hdr->replen += decode_commit_maxsz;
 912 }
 913
 914 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 915 {
 916         __be32 *p;
 917
 918         p = reserve_space(xdr, 8);
 919         *p++ = cpu_to_be32(OP_CREATE);
 920         *p = cpu_to_be32(create->ftype);
 921
 922         switch (create->ftype) {
 923         case NF4LNK:
 924                 p = reserve_space(xdr, 4);
 925                 *p = cpu_to_be32(create->u.symlink.len);
 926                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 927                 break;
 928
 929         case NF4BLK: case NF4CHR:
 930                 p = reserve_space(xdr, 8);
 931                 *p++ = cpu_to_be32(create->u.device.specdata1);
 932                 *p = cpu_to_be32(create->u.device.specdata2);
 933                 break;
 934
 935         default:
 936                 break;
 937         }
 938
 939         encode_string(xdr, create->name->len, create->name->name);
 940         hdr->nops++;
 941         hdr->replen += decode_create_maxsz;
 942
 943         encode_attrs(xdr, create->attrs, create->server);
 944 }
 945
 946 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 947 {
 948         __be32 *p;
 949
 950         p = reserve_space(xdr, 12);
 951         *p++ = cpu_to_be32(OP_GETATTR);
 952         *p++ = cpu_to_be32(1);
 953         *p = cpu_to_be32(bitmap);
 954         hdr->nops++;
 955         hdr->replen += decode_getattr_maxsz;
 956 }
 957
 958 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 959 {
 960         __be32 *p;
 961
 962         p = reserve_space(xdr, 16);
 963         *p++ = cpu_to_be32(OP_GETATTR);
 964         *p++ = cpu_to_be32(2);
 965         *p++ = cpu_to_be32(bm0);
 966         *p = cpu_to_be32(bm1);
 967         hdr->nops++;
 968         hdr->replen += decode_getattr_maxsz;
 969 }
 970
 971 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 972 {
 973         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 974                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 975 }
 976
 977 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 978 {
 979         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 980                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 981 }
 982
 983 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 984 {
 985         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 986                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 987 }
 988
 989 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 990 {
 991         __be32 *p;
 992
 993         p = reserve_space(xdr, 4);
 994         *p = cpu_to_be32(OP_GETFH);
 995         hdr->nops++;
 996         hdr->replen += decode_getfh_maxsz;
 997 }
 998
 999 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1000 {
1001         __be32 *p;
1002
1003         p = reserve_space(xdr, 8 + name->len);
1004         *p++ = cpu_to_be32(OP_LINK);
1005         xdr_encode_opaque(p, name->name, name->len);
1006         hdr->nops++;
1007         hdr->replen += decode_link_maxsz;
1008 }
1009
1010 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1011 {
1012         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1013                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1014         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1015 }
1016
1017 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1018 {
1019         if (fl->fl_end == OFFSET_MAX)
1020                 return ~(uint64_t)0;
1021         return fl->fl_end - fl->fl_start + 1;
1022 }
1023
1024 /*
1025  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1026  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1027  */
1028 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1029 {
1030         __be32 *p;
1031
1032         p = reserve_space(xdr, 32);
1033         *p++ = cpu_to_be32(OP_LOCK);
1034         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1035         *p++ = cpu_to_be32(args->reclaim);
1036         p = xdr_encode_hyper(p, args->fl->fl_start);
1037         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1038         *p = cpu_to_be32(args->new_lock_owner);
1039         if (args->new_lock_owner){
1040                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1041                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1042                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1043                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1044                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1045                 *p++ = cpu_to_be32(16);
1046                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1047                 xdr_encode_hyper(p, args->lock_owner.id);
1048         }
1049         else {
1050                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1051                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1052                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1053         }
1054         hdr->nops++;
1055         hdr->replen += decode_lock_maxsz;
1056 }
1057
1058 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1059 {
1060         __be32 *p;
1061
1062         p = reserve_space(xdr, 52);
1063         *p++ = cpu_to_be32(OP_LOCKT);
1064         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1065         p = xdr_encode_hyper(p, args->fl->fl_start);
1066         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1067         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1068         *p++ = cpu_to_be32(16);
1069         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1070         xdr_encode_hyper(p, args->lock_owner.id);
1071         hdr->nops++;
1072         hdr->replen += decode_lockt_maxsz;
1073 }
1074
1075 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1076 {
1077         __be32 *p;
1078
1079         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1080         *p++ = cpu_to_be32(OP_LOCKU);
1081         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1082         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1083         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1084         p = xdr_encode_hyper(p, args->fl->fl_start);
1085         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1086         hdr->nops++;
1087         hdr->replen += decode_locku_maxsz;
1088 }
1089
1090 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1091 {
1092         int len = name->len;
1093         __be32 *p;
1094
1095         p = reserve_space(xdr, 8 + len);
1096         *p++ = cpu_to_be32(OP_LOOKUP);
1097         xdr_encode_opaque(p, name->name, len);
1098         hdr->nops++;
1099         hdr->replen += decode_lookup_maxsz;
1100 }
1101
1102 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1103 {
1104         __be32 *p;
1105
1106         p = reserve_space(xdr, 8);
1107         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1108         case FMODE_READ:
1109                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1110                 break;
1111         case FMODE_WRITE:
1112                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1113                 break;
1114         case FMODE_READ|FMODE_WRITE:
1115                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1116                 break;
1117         default:
1118                 *p++ = cpu_to_be32(0);
1119         }
1120         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1121 }
1122
1123 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1124 {
1125         __be32 *p;
1126  /*
1127  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1128  * owner 4 = 32
1129  */
1130         p = reserve_space(xdr, 8);
1131         *p++ = cpu_to_be32(OP_OPEN);
1132         *p = cpu_to_be32(arg->seqid->sequence->counter);
1133         encode_share_access(xdr, arg->fmode);
1134         p = reserve_space(xdr, 28);
1135         p = xdr_encode_hyper(p, arg->clientid);
1136         *p++ = cpu_to_be32(16);
1137         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1138         xdr_encode_hyper(p, arg->id);
1139 }
1140
1141 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1142 {
1143         __be32 *p;
1144
1145         p = reserve_space(xdr, 4);
1146         switch(arg->open_flags & O_EXCL) {
1147         case 0:
1148                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1149                 encode_attrs(xdr, arg->u.attrs, arg->server);
1150                 break;
1151         default:
1152                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1153                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1154         }
1155 }
1156
1157 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1158 {
1159         __be32 *p;
1160
1161         p = reserve_space(xdr, 4);
1162         switch (arg->open_flags & O_CREAT) {
1163         case 0:
1164                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1165                 break;
1166         default:
1167                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1168                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1169                 encode_createmode(xdr, arg);
1170         }
1171 }
1172
1173 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1174 {
1175         __be32 *p;
1176
1177         p = reserve_space(xdr, 4);
1178         switch (delegation_type) {
1179         case 0:
1180                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1181                 break;
1182         case FMODE_READ:
1183                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1184                 break;
1185         case FMODE_WRITE|FMODE_READ:
1186                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1187                 break;
1188         default:
1189                 BUG();
1190         }
1191 }
1192
1193 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1194 {
1195         __be32 *p;
1196
1197         p = reserve_space(xdr, 4);
1198         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1199         encode_string(xdr, name->len, name->name);
1200 }
1201
1202 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1203 {
1204         __be32 *p;
1205
1206         p = reserve_space(xdr, 4);
1207         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1208         encode_delegation_type(xdr, type);
1209 }
1210
1211 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1212 {
1213         __be32 *p;
1214
1215         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1216         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1217         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1218         encode_string(xdr, name->len, name->name);
1219 }
1220
1221 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1222 {
1223         encode_openhdr(xdr, arg);
1224         encode_opentype(xdr, arg);
1225         switch (arg->claim) {
1226         case NFS4_OPEN_CLAIM_NULL:
1227                 encode_claim_null(xdr, arg->name);
1228                 break;
1229         case NFS4_OPEN_CLAIM_PREVIOUS:
1230                 encode_claim_previous(xdr, arg->u.delegation_type);
1231                 break;
1232         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1233                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1234                 break;
1235         default:
1236                 BUG();
1237         }
1238         hdr->nops++;
1239         hdr->replen += decode_open_maxsz;
1240 }
1241
1242 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1243 {
1244         __be32 *p;
1245
1246         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1247         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1248         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1249         *p = cpu_to_be32(arg->seqid->sequence->counter);
1250         hdr->nops++;
1251         hdr->replen += decode_open_confirm_maxsz;
1252 }
1253
1254 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1255 {
1256         __be32 *p;
1257
1258         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1259         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1260         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1261         *p = cpu_to_be32(arg->seqid->sequence->counter);
1262         encode_share_access(xdr, arg->fmode);
1263         hdr->nops++;
1264         hdr->replen += decode_open_downgrade_maxsz;
1265 }
1266
1267 static void
1268 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1269 {
1270         int len = fh->size;
1271         __be32 *p;
1272
1273         p = reserve_space(xdr, 8 + len);
1274         *p++ = cpu_to_be32(OP_PUTFH);
1275         xdr_encode_opaque(p, fh->data, len);
1276         hdr->nops++;
1277         hdr->replen += decode_putfh_maxsz;
1278 }
1279
1280 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1281 {
1282         __be32 *p;
1283
1284         p = reserve_space(xdr, 4);
1285         *p = cpu_to_be32(OP_PUTROOTFH);
1286         hdr->nops++;
1287         hdr->replen += decode_putrootfh_maxsz;
1288 }
1289
1290 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1291 {
1292         nfs4_stateid stateid;
1293         __be32 *p;
1294
1295         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1296         if (ctx->state != NULL) {
1297                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1298                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1299         } else
1300                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1301 }
1302
1303 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1304 {
1305         __be32 *p;
1306
1307         p = reserve_space(xdr, 4);
1308         *p = cpu_to_be32(OP_READ);
1309
1310         encode_stateid(xdr, args->context);
1311
1312         p = reserve_space(xdr, 12);
1313         p = xdr_encode_hyper(p, args->offset);
1314         *p = cpu_to_be32(args->count);
1315         hdr->nops++;
1316         hdr->replen += decode_read_maxsz;
1317 }
1318
1319 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1320 {
1321         uint32_t attrs[2] = {
1322                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1323                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1324         };
1325         __be32 *p;
1326
1327         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1328         *p++ = cpu_to_be32(OP_READDIR);
1329         p = xdr_encode_hyper(p, readdir->cookie);
1330         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1331         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1332         *p++ = cpu_to_be32(readdir->count);
1333         *p++ = cpu_to_be32(2);
1334         /* Switch to mounted_on_fileid if the server supports it */
1335         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1336                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1337         else
1338                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1339         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1340         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1341         hdr->nops++;
1342         hdr->replen += decode_readdir_maxsz;
1343         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1344                         __func__,
1345                         (unsigned long long)readdir->cookie,
1346                         ((u32 *)readdir->verifier.data)[0],
1347                         ((u32 *)readdir->verifier.data)[1],
1348                         attrs[0] & readdir->bitmask[0],
1349                         attrs[1] & readdir->bitmask[1]);
1350 }
1351
1352 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1353 {
1354         __be32 *p;
1355
1356         p = reserve_space(xdr, 4);
1357         *p = cpu_to_be32(OP_READLINK);
1358         hdr->nops++;
1359         hdr->replen += decode_readlink_maxsz;
1360 }
1361
1362 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 8 + name->len);
1367         *p++ = cpu_to_be32(OP_REMOVE);
1368         xdr_encode_opaque(p, name->name, name->len);
1369         hdr->nops++;
1370         hdr->replen += decode_remove_maxsz;
1371 }
1372
1373 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1374 {
1375         __be32 *p;
1376
1377         p = reserve_space(xdr, 4);
1378         *p = cpu_to_be32(OP_RENAME);
1379         encode_string(xdr, oldname->len, oldname->name);
1380         encode_string(xdr, newname->len, newname->name);
1381         hdr->nops++;
1382         hdr->replen += decode_rename_maxsz;
1383 }
1384
1385 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1386 {
1387         __be32 *p;
1388
1389         p = reserve_space(xdr, 12);
1390         *p++ = cpu_to_be32(OP_RENEW);
1391         xdr_encode_hyper(p, client_stateid->cl_clientid);
1392         hdr->nops++;
1393         hdr->replen += decode_renew_maxsz;
1394 }
1395
1396 static void
1397 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1398 {
1399         __be32 *p;
1400
1401         p = reserve_space(xdr, 4);
1402         *p = cpu_to_be32(OP_RESTOREFH);
1403         hdr->nops++;
1404         hdr->replen += decode_restorefh_maxsz;
1405 }
1406
1407 static int
1408 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1409 {
1410         __be32 *p;
1411
1412         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1413         *p++ = cpu_to_be32(OP_SETATTR);
1414         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1415         p = reserve_space(xdr, 2*4);
1416         *p++ = cpu_to_be32(1);
1417         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1418         if (arg->acl_len % 4)
1419                 return -EINVAL;
1420         p = reserve_space(xdr, 4);
1421         *p = cpu_to_be32(arg->acl_len);
1422         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1423         hdr->nops++;
1424         hdr->replen += decode_setacl_maxsz;
1425         return 0;
1426 }
1427
1428 static void
1429 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1430 {
1431         __be32 *p;
1432
1433         p = reserve_space(xdr, 4);
1434         *p = cpu_to_be32(OP_SAVEFH);
1435         hdr->nops++;
1436         hdr->replen += decode_savefh_maxsz;
1437 }
1438
1439 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1440 {
1441         __be32 *p;
1442
1443         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1444         *p++ = cpu_to_be32(OP_SETATTR);
1445         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1446         hdr->nops++;
1447         hdr->replen += decode_setattr_maxsz;
1448         encode_attrs(xdr, arg->iap, server);
1449 }
1450
1451 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1456         *p++ = cpu_to_be32(OP_SETCLIENTID);
1457         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1458
1459         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1460         p = reserve_space(xdr, 4);
1461         *p = cpu_to_be32(setclientid->sc_prog);
1462         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1463         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1464         p = reserve_space(xdr, 4);
1465         *p = cpu_to_be32(setclientid->sc_cb_ident);
1466         hdr->nops++;
1467         hdr->replen += decode_setclientid_maxsz;
1468 }
1469
1470 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1475         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1476         p = xdr_encode_hyper(p, client_state->cl_clientid);
1477         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1478         hdr->nops++;
1479         hdr->replen += decode_setclientid_confirm_maxsz;
1480 }
1481
1482 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1483 {
1484         __be32 *p;
1485
1486         p = reserve_space(xdr, 4);
1487         *p = cpu_to_be32(OP_WRITE);
1488
1489         encode_stateid(xdr, args->context);
1490
1491         p = reserve_space(xdr, 16);
1492         p = xdr_encode_hyper(p, args->offset);
1493         *p++ = cpu_to_be32(args->stable);
1494         *p = cpu_to_be32(args->count);
1495
1496         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1497         hdr->nops++;
1498         hdr->replen += decode_write_maxsz;
1499 }
1500
1501 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1502 {
1503         __be32 *p;
1504
1505         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1506
1507         *p++ = cpu_to_be32(OP_DELEGRETURN);
1508         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1509         hdr->nops++;
1510         hdr->replen += decode_delegreturn_maxsz;
1511 }
1512
1513 #if defined(CONFIG_NFS_V4_1)
1514 /* NFSv4.1 operations */
1515 static void encode_exchange_id(struct xdr_stream *xdr,
1516                                struct nfs41_exchange_id_args *args,
1517                                struct compound_hdr *hdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1522         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1523         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1524
1525         encode_string(xdr, args->id_len, args->id);
1526
1527         p = reserve_space(xdr, 12);
1528         *p++ = cpu_to_be32(args->flags);
1529         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1530         *p = cpu_to_be32(0);    /* zero length implementation id array */
1531         hdr->nops++;
1532         hdr->replen += decode_exchange_id_maxsz;
1533 }
1534
1535 static void encode_create_session(struct xdr_stream *xdr,
1536                                   struct nfs41_create_session_args *args,
1537                                   struct compound_hdr *hdr)
1538 {
1539         __be32 *p;
1540         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1541         uint32_t len;
1542         struct nfs_client *clp = args->client;
1543
1544         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1545                         clp->cl_ipaddr);
1546
1547         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1548         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1549         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1550         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1551         *p++ = cpu_to_be32(args->flags);                        /*flags */
1552
1553         /* Fore Channel */
1554         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1555         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1556         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1557         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1558         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1559         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1560         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1561
1562         /* Back Channel */
1563         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1564         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1565         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1566         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1567         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1568         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1569         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1570
1571         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1572         *p++ = cpu_to_be32(1);
1573         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1574
1575         /* authsys_parms rfc1831 */
1576         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1577         p = xdr_encode_opaque(p, machine_name, len);
1578         *p++ = cpu_to_be32(0);                          /* UID */
1579         *p++ = cpu_to_be32(0);                          /* GID */
1580         *p = cpu_to_be32(0);                            /* No more gids */
1581         hdr->nops++;
1582         hdr->replen += decode_create_session_maxsz;
1583 }
1584
1585 static void encode_destroy_session(struct xdr_stream *xdr,
1586                                    struct nfs4_session *session,
1587                                    struct compound_hdr *hdr)
1588 {
1589         __be32 *p;
1590         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1591         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1592         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1593         hdr->nops++;
1594         hdr->replen += decode_destroy_session_maxsz;
1595 }
1596 #endif /* CONFIG_NFS_V4_1 */
1597
1598 static void encode_sequence(struct xdr_stream *xdr,
1599                             const struct nfs4_sequence_args *args,
1600                             struct compound_hdr *hdr)
1601 {
1602 #if defined(CONFIG_NFS_V4_1)
1603         struct nfs4_session *session = args->sa_session;
1604         struct nfs4_slot_table *tp;
1605         struct nfs4_slot *slot;
1606         __be32 *p;
1607
1608         if (!session)
1609                 return;
1610
1611         tp = &session->fc_slot_table;
1612
1613         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1614         slot = tp->slots + args->sa_slotid;
1615
1616         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1617         *p++ = cpu_to_be32(OP_SEQUENCE);
1618
1619         /*
1620          * Sessionid + seqid + slotid + max slotid + cache_this
1621          */
1622         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1623                 "max_slotid=%d cache_this=%d\n",
1624                 __func__,
1625                 ((u32 *)session->sess_id.data)[0],
1626                 ((u32 *)session->sess_id.data)[1],
1627                 ((u32 *)session->sess_id.data)[2],
1628                 ((u32 *)session->sess_id.data)[3],
1629                 slot->seq_nr, args->sa_slotid,
1630                 tp->highest_used_slotid, args->sa_cache_this);
1631         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1632         *p++ = cpu_to_be32(slot->seq_nr);
1633         *p++ = cpu_to_be32(args->sa_slotid);
1634         *p++ = cpu_to_be32(tp->highest_used_slotid);
1635         *p = cpu_to_be32(args->sa_cache_this);
1636         hdr->nops++;
1637         hdr->replen += decode_sequence_maxsz;
1638 #endif /* CONFIG_NFS_V4_1 */
1639 }
1640
1641 /*
1642  * END OF "GENERIC" ENCODE ROUTINES.
1643  */
1644
1645 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1646 {
1647 #if defined(CONFIG_NFS_V4_1)
1648         if (args->sa_session)
1649                 return args->sa_session->clp->cl_minorversion;
1650 #endif /* CONFIG_NFS_V4_1 */
1651         return 0;
1652 }
1653
1654 /*
1655  * Encode an ACCESS request
1656  */
1657 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1658 {
1659         struct xdr_stream xdr;
1660         struct compound_hdr hdr = {
1661                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1662         };
1663
1664         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1665         encode_compound_hdr(&xdr, req, &hdr);
1666         encode_sequence(&xdr, &args->seq_args, &hdr);
1667         encode_putfh(&xdr, args->fh, &hdr);
1668         encode_access(&xdr, args->access, &hdr);
1669         encode_getfattr(&xdr, args->bitmask, &hdr);
1670         encode_nops(&hdr);
1671         return 0;
1672 }
1673
1674 /*
1675  * Encode LOOKUP request
1676  */
1677 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1678 {
1679         struct xdr_stream xdr;
1680         struct compound_hdr hdr = {
1681                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1682         };
1683
1684         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1685         encode_compound_hdr(&xdr, req, &hdr);
1686         encode_sequence(&xdr, &args->seq_args, &hdr);
1687         encode_putfh(&xdr, args->dir_fh, &hdr);
1688         encode_lookup(&xdr, args->name, &hdr);
1689         encode_getfh(&xdr, &hdr);
1690         encode_getfattr(&xdr, args->bitmask, &hdr);
1691         encode_nops(&hdr);
1692         return 0;
1693 }
1694
1695 /*
1696  * Encode LOOKUP_ROOT request
1697  */
1698 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1699 {
1700         struct xdr_stream xdr;
1701         struct compound_hdr hdr = {
1702                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1703         };
1704
1705         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1706         encode_compound_hdr(&xdr, req, &hdr);
1707         encode_sequence(&xdr, &args->seq_args, &hdr);
1708         encode_putrootfh(&xdr, &hdr);
1709         encode_getfh(&xdr, &hdr);
1710         encode_getfattr(&xdr, args->bitmask, &hdr);
1711         encode_nops(&hdr);
1712         return 0;
1713 }
1714
1715 /*
1716  * Encode REMOVE request
1717  */
1718 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1719 {
1720         struct xdr_stream xdr;
1721         struct compound_hdr hdr = {
1722                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1723         };
1724
1725         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1726         encode_compound_hdr(&xdr, req, &hdr);
1727         encode_sequence(&xdr, &args->seq_args, &hdr);
1728         encode_putfh(&xdr, args->fh, &hdr);
1729         encode_remove(&xdr, &args->name, &hdr);
1730         encode_getfattr(&xdr, args->bitmask, &hdr);
1731         encode_nops(&hdr);
1732         return 0;
1733 }
1734
1735 /*
1736  * Encode RENAME request
1737  */
1738 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1739 {
1740         struct xdr_stream xdr;
1741         struct compound_hdr hdr = {
1742                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1743         };
1744
1745         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1746         encode_compound_hdr(&xdr, req, &hdr);
1747         encode_sequence(&xdr, &args->seq_args, &hdr);
1748         encode_putfh(&xdr, args->old_dir, &hdr);
1749         encode_savefh(&xdr, &hdr);
1750         encode_putfh(&xdr, args->new_dir, &hdr);
1751         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1752         encode_getfattr(&xdr, args->bitmask, &hdr);
1753         encode_restorefh(&xdr, &hdr);
1754         encode_getfattr(&xdr, args->bitmask, &hdr);
1755         encode_nops(&hdr);
1756         return 0;
1757 }
1758
1759 /*
1760  * Encode LINK request
1761  */
1762 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1763 {
1764         struct xdr_stream xdr;
1765         struct compound_hdr hdr = {
1766                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1767         };
1768
1769         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1770         encode_compound_hdr(&xdr, req, &hdr);
1771         encode_sequence(&xdr, &args->seq_args, &hdr);
1772         encode_putfh(&xdr, args->fh, &hdr);
1773         encode_savefh(&xdr, &hdr);
1774         encode_putfh(&xdr, args->dir_fh, &hdr);
1775         encode_link(&xdr, args->name, &hdr);
1776         encode_getfattr(&xdr, args->bitmask, &hdr);
1777         encode_restorefh(&xdr, &hdr);
1778         encode_getfattr(&xdr, args->bitmask, &hdr);
1779         encode_nops(&hdr);
1780         return 0;
1781 }
1782
1783 /*
1784  * Encode CREATE request
1785  */
1786 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1787 {
1788         struct xdr_stream xdr;
1789         struct compound_hdr hdr = {
1790                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1791         };
1792
1793         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1794         encode_compound_hdr(&xdr, req, &hdr);
1795         encode_sequence(&xdr, &args->seq_args, &hdr);
1796         encode_putfh(&xdr, args->dir_fh, &hdr);
1797         encode_savefh(&xdr, &hdr);
1798         encode_create(&xdr, args, &hdr);
1799         encode_getfh(&xdr, &hdr);
1800         encode_getfattr(&xdr, args->bitmask, &hdr);
1801         encode_restorefh(&xdr, &hdr);
1802         encode_getfattr(&xdr, args->bitmask, &hdr);
1803         encode_nops(&hdr);
1804         return 0;
1805 }
1806
1807 /*
1808  * Encode SYMLINK request
1809  */
1810 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1811 {
1812         return nfs4_xdr_enc_create(req, p, args);
1813 }
1814
1815 /*
1816  * Encode GETATTR request
1817  */
1818 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1819 {
1820         struct xdr_stream xdr;
1821         struct compound_hdr hdr = {
1822                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1823         };
1824
1825         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1826         encode_compound_hdr(&xdr, req, &hdr);
1827         encode_sequence(&xdr, &args->seq_args, &hdr);
1828         encode_putfh(&xdr, args->fh, &hdr);
1829         encode_getfattr(&xdr, args->bitmask, &hdr);
1830         encode_nops(&hdr);
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode a CLOSE request
1836  */
1837 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1838 {
1839         struct xdr_stream xdr;
1840         struct compound_hdr hdr = {
1841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842         };
1843
1844         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845         encode_compound_hdr(&xdr, req, &hdr);
1846         encode_sequence(&xdr, &args->seq_args, &hdr);
1847         encode_putfh(&xdr, args->fh, &hdr);
1848         encode_close(&xdr, args, &hdr);
1849         encode_getfattr(&xdr, args->bitmask, &hdr);
1850         encode_nops(&hdr);
1851         return 0;
1852 }
1853
1854 /*
1855  * Encode an OPEN request
1856  */
1857 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1858 {
1859         struct xdr_stream xdr;
1860         struct compound_hdr hdr = {
1861                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1862         };
1863
1864         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1865         encode_compound_hdr(&xdr, req, &hdr);
1866         encode_sequence(&xdr, &args->seq_args, &hdr);
1867         encode_putfh(&xdr, args->fh, &hdr);
1868         encode_savefh(&xdr, &hdr);
1869         encode_open(&xdr, args, &hdr);
1870         encode_getfh(&xdr, &hdr);
1871         encode_getfattr(&xdr, args->bitmask, &hdr);
1872         encode_restorefh(&xdr, &hdr);
1873         encode_getfattr(&xdr, args->bitmask, &hdr);
1874         encode_nops(&hdr);
1875         return 0;
1876 }
1877
1878 /*
1879  * Encode an OPEN_CONFIRM request
1880  */
1881 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1882 {
1883         struct xdr_stream xdr;
1884         struct compound_hdr hdr = {
1885                 .nops   = 0,
1886         };
1887
1888         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1889         encode_compound_hdr(&xdr, req, &hdr);
1890         encode_putfh(&xdr, args->fh, &hdr);
1891         encode_open_confirm(&xdr, args, &hdr);
1892         encode_nops(&hdr);
1893         return 0;
1894 }
1895
1896 /*
1897  * Encode an OPEN request with no attributes.
1898  */
1899 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1900 {
1901         struct xdr_stream xdr;
1902         struct compound_hdr hdr = {
1903                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1904         };
1905
1906         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1907         encode_compound_hdr(&xdr, req, &hdr);
1908         encode_sequence(&xdr, &args->seq_args, &hdr);
1909         encode_putfh(&xdr, args->fh, &hdr);
1910         encode_open(&xdr, args, &hdr);
1911         encode_getfattr(&xdr, args->bitmask, &hdr);
1912         encode_nops(&hdr);
1913         return 0;
1914 }
1915
1916 /*
1917  * Encode an OPEN_DOWNGRADE request
1918  */
1919 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1920 {
1921         struct xdr_stream xdr;
1922         struct compound_hdr hdr = {
1923                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1924         };
1925
1926         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1927         encode_compound_hdr(&xdr, req, &hdr);
1928         encode_sequence(&xdr, &args->seq_args, &hdr);
1929         encode_putfh(&xdr, args->fh, &hdr);
1930         encode_open_downgrade(&xdr, args, &hdr);
1931         encode_getfattr(&xdr, args->bitmask, &hdr);
1932         encode_nops(&hdr);
1933         return 0;
1934 }
1935
1936 /*
1937  * Encode a LOCK request
1938  */
1939 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1940 {
1941         struct xdr_stream xdr;
1942         struct compound_hdr hdr = {
1943                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1944         };
1945
1946         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1947         encode_compound_hdr(&xdr, req, &hdr);
1948         encode_sequence(&xdr, &args->seq_args, &hdr);
1949         encode_putfh(&xdr, args->fh, &hdr);
1950         encode_lock(&xdr, args, &hdr);
1951         encode_nops(&hdr);
1952         return 0;
1953 }
1954
1955 /*
1956  * Encode a LOCKT request
1957  */
1958 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1963         };
1964
1965         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966         encode_compound_hdr(&xdr, req, &hdr);
1967         encode_sequence(&xdr, &args->seq_args, &hdr);
1968         encode_putfh(&xdr, args->fh, &hdr);
1969         encode_lockt(&xdr, args, &hdr);
1970         encode_nops(&hdr);
1971         return 0;
1972 }
1973
1974 /*
1975  * Encode a LOCKU request
1976  */
1977 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1978 {
1979         struct xdr_stream xdr;
1980         struct compound_hdr hdr = {
1981                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1982         };
1983
1984         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1985         encode_compound_hdr(&xdr, req, &hdr);
1986         encode_sequence(&xdr, &args->seq_args, &hdr);
1987         encode_putfh(&xdr, args->fh, &hdr);
1988         encode_locku(&xdr, args, &hdr);
1989         encode_nops(&hdr);
1990         return 0;
1991 }
1992
1993 /*
1994  * Encode a READLINK request
1995  */
1996 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1997 {
1998         struct xdr_stream xdr;
1999         struct compound_hdr hdr = {
2000                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2001         };
2002
2003         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2004         encode_compound_hdr(&xdr, req, &hdr);
2005         encode_sequence(&xdr, &args->seq_args, &hdr);
2006         encode_putfh(&xdr, args->fh, &hdr);
2007         encode_readlink(&xdr, args, req, &hdr);
2008
2009         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2010                         args->pgbase, args->pglen);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  * Encode a READDIR request
2017  */
2018 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026         encode_compound_hdr(&xdr, req, &hdr);
2027         encode_sequence(&xdr, &args->seq_args, &hdr);
2028         encode_putfh(&xdr, args->fh, &hdr);
2029         encode_readdir(&xdr, args, req, &hdr);
2030
2031         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2032                          args->pgbase, args->count);
2033         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2034                         __func__, hdr.replen << 2, args->pages,
2035                         args->pgbase, args->count);
2036         encode_nops(&hdr);
2037         return 0;
2038 }
2039
2040 /*
2041  * Encode a READ request
2042  */
2043 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2044 {
2045         struct xdr_stream xdr;
2046         struct compound_hdr hdr = {
2047                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2048         };
2049
2050         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2051         encode_compound_hdr(&xdr, req, &hdr);
2052         encode_sequence(&xdr, &args->seq_args, &hdr);
2053         encode_putfh(&xdr, args->fh, &hdr);
2054         encode_read(&xdr, args, &hdr);
2055
2056         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2057                          args->pages, args->pgbase, args->count);
2058         req->rq_rcv_buf.flags |= XDRBUF_READ;
2059         encode_nops(&hdr);
2060         return 0;
2061 }
2062
2063 /*
2064  * Encode an SETATTR request
2065  */
2066 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2067 {
2068         struct xdr_stream xdr;
2069         struct compound_hdr hdr = {
2070                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2071         };
2072
2073         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2074         encode_compound_hdr(&xdr, req, &hdr);
2075         encode_sequence(&xdr, &args->seq_args, &hdr);
2076         encode_putfh(&xdr, args->fh, &hdr);
2077         encode_setattr(&xdr, args, args->server, &hdr);
2078         encode_getfattr(&xdr, args->bitmask, &hdr);
2079         encode_nops(&hdr);
2080         return 0;
2081 }
2082
2083 /*
2084  * Encode a GETACL request
2085  */
2086 static int
2087 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2088                 struct nfs_getaclargs *args)
2089 {
2090         struct xdr_stream xdr;
2091         struct compound_hdr hdr = {
2092                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2093         };
2094         uint32_t replen;
2095
2096         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2097         encode_compound_hdr(&xdr, req, &hdr);
2098         encode_sequence(&xdr, &args->seq_args, &hdr);
2099         encode_putfh(&xdr, args->fh, &hdr);
2100         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2101         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2102
2103         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2104                 args->acl_pages, args->acl_pgbase, args->acl_len);
2105         encode_nops(&hdr);
2106         return 0;
2107 }
2108
2109 /*
2110  * Encode a WRITE request
2111  */
2112 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2113 {
2114         struct xdr_stream xdr;
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2120         encode_compound_hdr(&xdr, req, &hdr);
2121         encode_sequence(&xdr, &args->seq_args, &hdr);
2122         encode_putfh(&xdr, args->fh, &hdr);
2123         encode_write(&xdr, args, &hdr);
2124         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2125         encode_getfattr(&xdr, args->bitmask, &hdr);
2126         encode_nops(&hdr);
2127         return 0;
2128 }
2129
2130 /*
2131  *  a COMMIT request
2132  */
2133 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2134 {
2135         struct xdr_stream xdr;
2136         struct compound_hdr hdr = {
2137                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2138         };
2139
2140         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2141         encode_compound_hdr(&xdr, req, &hdr);
2142         encode_sequence(&xdr, &args->seq_args, &hdr);
2143         encode_putfh(&xdr, args->fh, &hdr);
2144         encode_commit(&xdr, args, &hdr);
2145         encode_getfattr(&xdr, args->bitmask, &hdr);
2146         encode_nops(&hdr);
2147         return 0;
2148 }
2149
2150 /*
2151  * FSINFO request
2152  */
2153 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2154 {
2155         struct xdr_stream xdr;
2156         struct compound_hdr hdr = {
2157                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2158         };
2159
2160         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2161         encode_compound_hdr(&xdr, req, &hdr);
2162         encode_sequence(&xdr, &args->seq_args, &hdr);
2163         encode_putfh(&xdr, args->fh, &hdr);
2164         encode_fsinfo(&xdr, args->bitmask, &hdr);
2165         encode_nops(&hdr);
2166         return 0;
2167 }
2168
2169 /*
2170  * a PATHCONF request
2171  */
2172 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2173 {
2174         struct xdr_stream xdr;
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2180         encode_compound_hdr(&xdr, req, &hdr);
2181         encode_sequence(&xdr, &args->seq_args, &hdr);
2182         encode_putfh(&xdr, args->fh, &hdr);
2183         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2184                            &hdr);
2185         encode_nops(&hdr);
2186         return 0;
2187 }
2188
2189 /*
2190  * a STATFS request
2191  */
2192 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2193 {
2194         struct xdr_stream xdr;
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2200         encode_compound_hdr(&xdr, req, &hdr);
2201         encode_sequence(&xdr, &args->seq_args, &hdr);
2202         encode_putfh(&xdr, args->fh, &hdr);
2203         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2204                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2205         encode_nops(&hdr);
2206         return 0;
2207 }
2208
2209 /*
2210  * GETATTR_BITMAP request
2211  */
2212 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2213                                     struct nfs4_server_caps_arg *args)
2214 {
2215         struct xdr_stream xdr;
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2221         encode_compound_hdr(&xdr, req, &hdr);
2222         encode_sequence(&xdr, &args->seq_args, &hdr);
2223         encode_putfh(&xdr, args->fhandle, &hdr);
2224         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2225                            FATTR4_WORD0_LINK_SUPPORT|
2226                            FATTR4_WORD0_SYMLINK_SUPPORT|
2227                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2228         encode_nops(&hdr);
2229         return 0;
2230 }
2231
2232 /*
2233  * a RENEW request
2234  */
2235 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2236 {
2237         struct xdr_stream xdr;
2238         struct compound_hdr hdr = {
2239                 .nops   = 0,
2240         };
2241
2242         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2243         encode_compound_hdr(&xdr, req, &hdr);
2244         encode_renew(&xdr, clp, &hdr);
2245         encode_nops(&hdr);
2246         return 0;
2247 }
2248
2249 /*
2250  * a SETCLIENTID request
2251  */
2252 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2253 {
2254         struct xdr_stream xdr;
2255         struct compound_hdr hdr = {
2256                 .nops   = 0,
2257         };
2258
2259         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2260         encode_compound_hdr(&xdr, req, &hdr);
2261         encode_setclientid(&xdr, sc, &hdr);
2262         encode_nops(&hdr);
2263         return 0;
2264 }
2265
2266 /*
2267  * a SETCLIENTID_CONFIRM request
2268  */
2269 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2270 {
2271         struct xdr_stream xdr;
2272         struct compound_hdr hdr = {
2273                 .nops   = 0,
2274         };
2275         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2276
2277         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2278         encode_compound_hdr(&xdr, req, &hdr);
2279         encode_setclientid_confirm(&xdr, clp, &hdr);
2280         encode_putrootfh(&xdr, &hdr);
2281         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2282         encode_nops(&hdr);
2283         return 0;
2284 }
2285
2286 /*
2287  * DELEGRETURN request
2288  */
2289 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2290 {
2291         struct xdr_stream xdr;
2292         struct compound_hdr hdr = {
2293                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2294         };
2295
2296         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2297         encode_compound_hdr(&xdr, req, &hdr);
2298         encode_sequence(&xdr, &args->seq_args, &hdr);
2299         encode_putfh(&xdr, args->fhandle, &hdr);
2300         encode_delegreturn(&xdr, args->stateid, &hdr);
2301         encode_getfattr(&xdr, args->bitmask, &hdr);
2302         encode_nops(&hdr);
2303         return 0;
2304 }
2305
2306 /*
2307  * Encode FS_LOCATIONS request
2308  */
2309 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2310 {
2311         struct xdr_stream xdr;
2312         struct compound_hdr hdr = {
2313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2314         };
2315         uint32_t replen;
2316
2317         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2318         encode_compound_hdr(&xdr, req, &hdr);
2319         encode_sequence(&xdr, &args->seq_args, &hdr);
2320         encode_putfh(&xdr, args->dir_fh, &hdr);
2321         encode_lookup(&xdr, args->name, &hdr);
2322         replen = hdr.replen;    /* get the attribute into args->page */
2323         encode_fs_locations(&xdr, args->bitmask, &hdr);
2324
2325         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2326                         0, PAGE_SIZE);
2327         encode_nops(&hdr);
2328         return 0;
2329 }
2330
2331 #if defined(CONFIG_NFS_V4_1)
2332 /*
2333  * EXCHANGE_ID request
2334  */
2335 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2336                                     struct nfs41_exchange_id_args *args)
2337 {
2338         struct xdr_stream xdr;
2339         struct compound_hdr hdr = {
2340                 .minorversion = args->client->cl_minorversion,
2341         };
2342
2343         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2344         encode_compound_hdr(&xdr, req, &hdr);
2345         encode_exchange_id(&xdr, args, &hdr);
2346         encode_nops(&hdr);
2347         return 0;
2348 }
2349
2350 /*
2351  * a CREATE_SESSION request
2352  */
2353 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2354                                        struct nfs41_create_session_args *args)
2355 {
2356         struct xdr_stream xdr;
2357         struct compound_hdr hdr = {
2358                 .minorversion = args->client->cl_minorversion,
2359         };
2360
2361         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2362         encode_compound_hdr(&xdr, req, &hdr);
2363         encode_create_session(&xdr, args, &hdr);
2364         encode_nops(&hdr);
2365         return 0;
2366 }
2367
2368 /*
2369  * a DESTROY_SESSION request
2370  */
2371 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2372                                         struct nfs4_session *session)
2373 {
2374         struct xdr_stream xdr;
2375         struct compound_hdr hdr = {
2376                 .minorversion = session->clp->cl_minorversion,
2377         };
2378
2379         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2380         encode_compound_hdr(&xdr, req, &hdr);
2381         encode_destroy_session(&xdr, session, &hdr);
2382         encode_nops(&hdr);
2383         return 0;
2384 }
2385
2386 /*
2387  * a SEQUENCE request
2388  */
2389 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2390                                  struct nfs4_sequence_args *args)
2391 {
2392         struct xdr_stream xdr;
2393         struct compound_hdr hdr = {
2394                 .minorversion = nfs4_xdr_minorversion(args),
2395         };
2396
2397         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2398         encode_compound_hdr(&xdr, req, &hdr);
2399         encode_sequence(&xdr, args, &hdr);
2400         encode_nops(&hdr);
2401         return 0;
2402 }
2403
2404 /*
2405  * a GET_LEASE_TIME request
2406  */
2407 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2408                                        struct nfs4_get_lease_time_args *args)
2409 {
2410         struct xdr_stream xdr;
2411         struct compound_hdr hdr = {
2412                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2413         };
2414         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2415
2416         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2417         encode_compound_hdr(&xdr, req, &hdr);
2418         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2419         encode_putrootfh(&xdr, &hdr);
2420         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2421         encode_nops(&hdr);
2422         return 0;
2423 }
2424 #endif /* CONFIG_NFS_V4_1 */
2425
2426 /*
2427  * START OF "GENERIC" DECODE ROUTINES.
2428  *   These may look a little ugly since they are imported from a "generic"
2429  * set of XDR encode/decode routines which are intended to be shared by
2430  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2431  *
2432  * If the pain of reading these is too great, it should be a straightforward
2433  * task to translate them into Linux-specific versions which are more
2434  * consistent with the style used in NFSv2/v3...
2435  */
2436 #define COPYMEM(x,nbytes) do {                  \
2437         memcpy((x), p, nbytes);                 \
2438         p += XDR_QUADLEN(nbytes);               \
2439 } while (0)
2440
2441 #define READ_BUF(nbytes)  do { \
2442         p = xdr_inline_decode(xdr, nbytes); \
2443         if (unlikely(!p)) { \
2444                 print_overflow_msg(__func__, xdr); \
2445                 return -EIO; \
2446         } \
2447 } while (0)
2448
2449 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2450 {
2451         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2452                 "Remaining buffer length is %tu words.\n",
2453                 func, xdr->end - xdr->p);
2454 }
2455
2456 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2457 {
2458         __be32 *p;
2459
2460         READ_BUF(4);
2461         *len = be32_to_cpup(p++);
2462         READ_BUF(*len);
2463         *string = (char *)p;
2464         return 0;
2465 }
2466
2467 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2468 {
2469         __be32 *p;
2470
2471         READ_BUF(8);
2472         hdr->status = be32_to_cpup(p++);
2473         hdr->taglen = be32_to_cpup(p++);
2474
2475         READ_BUF(hdr->taglen + 4);
2476         hdr->tag = (char *)p;
2477         p += XDR_QUADLEN(hdr->taglen);
2478         hdr->nops = be32_to_cpup(p++);
2479         if (unlikely(hdr->nops < 1))
2480                 return nfs4_stat_to_errno(hdr->status);
2481         return 0;
2482 }
2483
2484 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2485 {
2486         __be32 *p;
2487         uint32_t opnum;
2488         int32_t nfserr;
2489
2490         READ_BUF(8);
2491         opnum = be32_to_cpup(p++);
2492         if (opnum != expected) {
2493                 dprintk("nfs: Server returned operation"
2494                         " %d but we issued a request for %d\n",
2495                                 opnum, expected);
2496                 return -EIO;
2497         }
2498         nfserr = be32_to_cpup(p++);
2499         if (nfserr != NFS_OK)
2500                 return nfs4_stat_to_errno(nfserr);
2501         return 0;
2502 }
2503
2504 /* Dummy routine */
2505 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2506 {
2507         __be32 *p;
2508         unsigned int strlen;
2509         char *str;
2510
2511         READ_BUF(12);
2512         return decode_opaque_inline(xdr, &strlen, &str);
2513 }
2514
2515 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2516 {
2517         uint32_t bmlen;
2518         __be32 *p;
2519
2520         READ_BUF(4);
2521         bmlen = be32_to_cpup(p++);
2522
2523         bitmap[0] = bitmap[1] = 0;
2524         READ_BUF((bmlen << 2));
2525         if (bmlen > 0) {
2526                 bitmap[0] = be32_to_cpup(p++);
2527                 if (bmlen > 1)
2528                         bitmap[1] = be32_to_cpup(p++);
2529         }
2530         return 0;
2531 }
2532
2533 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2534 {
2535         __be32 *p;
2536
2537         READ_BUF(4);
2538         *attrlen = be32_to_cpup(p++);
2539         *savep = xdr->p;
2540         return 0;
2541 }
2542
2543 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2544 {
2545         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2546                 decode_attr_bitmap(xdr, bitmask);
2547                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2548         } else
2549                 bitmask[0] = bitmask[1] = 0;
2550         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2551         return 0;
2552 }
2553
2554 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2555 {
2556         __be32 *p;
2557         int ret = 0;
2558
2559         *type = 0;
2560         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2561                 return -EIO;
2562         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2563                 READ_BUF(4);
2564                 *type = be32_to_cpup(p++);
2565                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2566                         dprintk("%s: bad type %d\n", __func__, *type);
2567                         return -EIO;
2568                 }
2569                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2570                 ret = NFS_ATTR_FATTR_TYPE;
2571         }
2572         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2573         return ret;
2574 }
2575
2576 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2577 {
2578         __be32 *p;
2579         int ret = 0;
2580
2581         *change = 0;
2582         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2583                 return -EIO;
2584         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2585                 READ_BUF(8);
2586                 p = xdr_decode_hyper(p, change);
2587                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2588                 ret = NFS_ATTR_FATTR_CHANGE;
2589         }
2590         dprintk("%s: change attribute=%Lu\n", __func__,
2591                         (unsigned long long)*change);
2592         return ret;
2593 }
2594
2595 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2596 {
2597         __be32 *p;
2598         int ret = 0;
2599
2600         *size = 0;
2601         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2602                 return -EIO;
2603         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2604                 READ_BUF(8);
2605                 p = xdr_decode_hyper(p, size);
2606                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2607                 ret = NFS_ATTR_FATTR_SIZE;
2608         }
2609         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2610         return ret;
2611 }
2612
2613 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2614 {
2615         __be32 *p;
2616
2617         *res = 0;
2618         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2619                 return -EIO;
2620         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2621                 READ_BUF(4);
2622                 *res = be32_to_cpup(p++);
2623                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2624         }
2625         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2626         return 0;
2627 }
2628
2629 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2630 {
2631         __be32 *p;
2632
2633         *res = 0;
2634         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2635                 return -EIO;
2636         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2637                 READ_BUF(4);
2638                 *res = be32_to_cpup(p++);
2639                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2640         }
2641         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2642         return 0;
2643 }
2644
2645 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2646 {
2647         __be32 *p;
2648         int ret = 0;
2649
2650         fsid->major = 0;
2651         fsid->minor = 0;
2652         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2653                 return -EIO;
2654         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2655                 READ_BUF(16);
2656                 p = xdr_decode_hyper(p, &fsid->major);
2657                 p = xdr_decode_hyper(p, &fsid->minor);
2658                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2659                 ret = NFS_ATTR_FATTR_FSID;
2660         }
2661         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2662                         (unsigned long long)fsid->major,
2663                         (unsigned long long)fsid->minor);
2664         return ret;
2665 }
2666
2667 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2668 {
2669         __be32 *p;
2670
2671         *res = 60;
2672         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2673                 return -EIO;
2674         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2675                 READ_BUF(4);
2676                 *res = be32_to_cpup(p++);
2677                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2678         }
2679         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2680         return 0;
2681 }
2682
2683 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2684 {
2685         __be32 *p;
2686
2687         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2688         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2689                 return -EIO;
2690         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2691                 READ_BUF(4);
2692                 *res = be32_to_cpup(p++);
2693                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2694         }
2695         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2696         return 0;
2697 }
2698
2699 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2700 {
2701         __be32 *p;
2702         int ret = 0;
2703
2704         *fileid = 0;
2705         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2706                 return -EIO;
2707         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2708                 READ_BUF(8);
2709                 p = xdr_decode_hyper(p, fileid);
2710                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2711                 ret = NFS_ATTR_FATTR_FILEID;
2712         }
2713         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2714         return ret;
2715 }
2716
2717 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2718 {
2719         __be32 *p;
2720         int ret = 0;
2721
2722         *fileid = 0;
2723         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2724                 return -EIO;
2725         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2726                 READ_BUF(8);
2727                 p = xdr_decode_hyper(p, fileid);
2728                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2729                 ret = NFS_ATTR_FATTR_FILEID;
2730         }
2731         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2732         return ret;
2733 }
2734
2735 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2736 {
2737         __be32 *p;
2738         int status = 0;
2739
2740         *res = 0;
2741         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2742                 return -EIO;
2743         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2744                 READ_BUF(8);
2745                 p = xdr_decode_hyper(p, res);
2746                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2747         }
2748         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2749         return status;
2750 }
2751
2752 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2753 {
2754         __be32 *p;
2755         int status = 0;
2756
2757         *res = 0;
2758         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2759                 return -EIO;
2760         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2761                 READ_BUF(8);
2762                 p = xdr_decode_hyper(p, res);
2763                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2764         }
2765         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2766         return status;
2767 }
2768
2769 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2770 {
2771         __be32 *p;
2772         int status = 0;
2773
2774         *res = 0;
2775         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2776                 return -EIO;
2777         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2778                 READ_BUF(8);
2779                 p = xdr_decode_hyper(p, res);
2780                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2781         }
2782         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2783         return status;
2784 }
2785
2786 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2787 {
2788         u32 n;
2789         __be32 *p;
2790         int status = 0;
2791
2792         READ_BUF(4);
2793         n = be32_to_cpup(p++);
2794         if (n == 0)
2795                 goto root_path;
2796         dprintk("path ");
2797         path->ncomponents = 0;
2798         while (path->ncomponents < n) {
2799                 struct nfs4_string *component = &path->components[path->ncomponents];
2800                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2801                 if (unlikely(status != 0))
2802                         goto out_eio;
2803                 if (path->ncomponents != n)
2804                         dprintk("/");
2805                 dprintk("%s", component->data);
2806                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2807                         path->ncomponents++;
2808                 else {
2809                         dprintk("cannot parse %d components in path\n", n);
2810                         goto out_eio;
2811                 }
2812         }
2813 out:
2814         dprintk("\n");
2815         return status;
2816 root_path:
2817 /* a root pathname is sent as a zero component4 */
2818         path->ncomponents = 1;
2819         path->components[0].len=0;
2820         path->components[0].data=NULL;
2821         dprintk("path /\n");
2822         goto out;
2823 out_eio:
2824         dprintk(" status %d", status);
2825         status = -EIO;
2826         goto out;
2827 }
2828
2829 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2830 {
2831         int n;
2832         __be32 *p;
2833         int status = -EIO;
2834
2835         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2836                 goto out;
2837         status = 0;
2838         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2839                 goto out;
2840         dprintk("%s: fsroot ", __func__);
2841         status = decode_pathname(xdr, &res->fs_path);
2842         if (unlikely(status != 0))
2843                 goto out;
2844         READ_BUF(4);
2845         n = be32_to_cpup(p++);
2846         if (n <= 0)
2847                 goto out_eio;
2848         res->nlocations = 0;
2849         while (res->nlocations < n) {
2850                 u32 m;
2851                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2852
2853                 READ_BUF(4);
2854                 m = be32_to_cpup(p++);
2855
2856                 loc->nservers = 0;
2857                 dprintk("%s: servers ", __func__);
2858                 while (loc->nservers < m) {
2859                         struct nfs4_string *server = &loc->servers[loc->nservers];
2860                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2861                         if (unlikely(status != 0))
2862                                 goto out_eio;
2863                         dprintk("%s ", server->data);
2864                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2865                                 loc->nservers++;
2866                         else {
2867                                 unsigned int i;
2868                                 dprintk("%s: using first %u of %u servers "
2869                                         "returned for location %u\n",
2870                                                 __func__,
2871                                                 NFS4_FS_LOCATION_MAXSERVERS,
2872                                                 m, res->nlocations);
2873                                 for (i = loc->nservers; i < m; i++) {
2874                                         unsigned int len;
2875                                         char *data;
2876                                         status = decode_opaque_inline(xdr, &len, &data);
2877                                         if (unlikely(status != 0))
2878                                                 goto out_eio;
2879                                 }
2880                         }
2881                 }
2882                 status = decode_pathname(xdr, &loc->rootpath);
2883                 if (unlikely(status != 0))
2884                         goto out_eio;
2885                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2886                         res->nlocations++;
2887         }
2888         if (res->nlocations != 0)
2889                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2890 out:
2891         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2892         return status;
2893 out_eio:
2894         status = -EIO;
2895         goto out;
2896 }
2897
2898 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2899 {
2900         __be32 *p;
2901         int status = 0;
2902
2903         *res = 0;
2904         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2905                 return -EIO;
2906         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2907                 READ_BUF(8);
2908                 p = xdr_decode_hyper(p, res);
2909                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2910         }
2911         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2912         return status;
2913 }
2914
2915 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2916 {
2917         __be32 *p;
2918         int status = 0;
2919
2920         *maxlink = 1;
2921         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2922                 return -EIO;
2923         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2924                 READ_BUF(4);
2925                 *maxlink = be32_to_cpup(p++);
2926                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2927         }
2928         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2929         return status;
2930 }
2931
2932 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2933 {
2934         __be32 *p;
2935         int status = 0;
2936
2937         *maxname = 1024;
2938         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2939                 return -EIO;
2940         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2941                 READ_BUF(4);
2942                 *maxname = be32_to_cpup(p++);
2943                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2944         }
2945         dprintk("%s: maxname=%u\n", __func__, *maxname);
2946         return status;
2947 }
2948
2949 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2950 {
2951         __be32 *p;
2952         int status = 0;
2953
2954         *res = 1024;
2955         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2956                 return -EIO;
2957         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2958                 uint64_t maxread;
2959                 READ_BUF(8);
2960                 p = xdr_decode_hyper(p, &maxread);
2961                 if (maxread > 0x7FFFFFFF)
2962                         maxread = 0x7FFFFFFF;
2963                 *res = (uint32_t)maxread;
2964                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2965         }
2966         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2967         return status;
2968 }
2969
2970 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2971 {
2972         __be32 *p;
2973         int status = 0;
2974
2975         *res = 1024;
2976         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2977                 return -EIO;
2978         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2979                 uint64_t maxwrite;
2980                 READ_BUF(8);
2981                 p = xdr_decode_hyper(p, &maxwrite);
2982                 if (maxwrite > 0x7FFFFFFF)
2983                         maxwrite = 0x7FFFFFFF;
2984                 *res = (uint32_t)maxwrite;
2985                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2986         }
2987         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2988         return status;
2989 }
2990
2991 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2992 {
2993         uint32_t tmp;
2994         __be32 *p;
2995         int ret = 0;
2996
2997         *mode = 0;
2998         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2999                 return -EIO;
3000         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3001                 READ_BUF(4);
3002                 tmp = be32_to_cpup(p++);
3003                 *mode = tmp & ~S_IFMT;
3004                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3005                 ret = NFS_ATTR_FATTR_MODE;
3006         }
3007         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3008         return ret;
3009 }
3010
3011 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3012 {
3013         __be32 *p;
3014         int ret = 0;
3015
3016         *nlink = 1;
3017         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3018                 return -EIO;
3019         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3020                 READ_BUF(4);
3021                 *nlink = be32_to_cpup(p++);
3022                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3023                 ret = NFS_ATTR_FATTR_NLINK;
3024         }
3025         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3026         return ret;
3027 }
3028
3029 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3030 {
3031         uint32_t len;
3032         __be32 *p;
3033         int ret = 0;
3034
3035         *uid = -2;
3036         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3037                 return -EIO;
3038         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3039                 READ_BUF(4);
3040                 len = be32_to_cpup(p++);
3041                 READ_BUF(len);
3042                 if (len < XDR_MAX_NETOBJ) {
3043                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3044                                 ret = NFS_ATTR_FATTR_OWNER;
3045                         else
3046                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3047                                                 __func__);
3048                 } else
3049                         dprintk("%s: name too long (%u)!\n",
3050                                         __func__, len);
3051                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3052         }
3053         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3054         return ret;
3055 }
3056
3057 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3058 {
3059         uint32_t len;
3060         __be32 *p;
3061         int ret = 0;
3062
3063         *gid = -2;
3064         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3065                 return -EIO;
3066         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3067                 READ_BUF(4);
3068                 len = be32_to_cpup(p++);
3069                 READ_BUF(len);
3070                 if (len < XDR_MAX_NETOBJ) {
3071                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3072                                 ret = NFS_ATTR_FATTR_GROUP;
3073                         else
3074                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3075                                                 __func__);
3076                 } else
3077                         dprintk("%s: name too long (%u)!\n",
3078                                         __func__, len);
3079                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3080         }
3081         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3082         return ret;
3083 }
3084
3085 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3086 {
3087         uint32_t major = 0, minor = 0;
3088         __be32 *p;
3089         int ret = 0;
3090
3091         *rdev = MKDEV(0,0);
3092         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3093                 return -EIO;
3094         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3095                 dev_t tmp;
3096
3097                 READ_BUF(8);
3098                 major = be32_to_cpup(p++);
3099                 minor = be32_to_cpup(p++);
3100                 tmp = MKDEV(major, minor);
3101                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3102                         *rdev = tmp;
3103                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3104                 ret = NFS_ATTR_FATTR_RDEV;
3105         }
3106         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3107         return ret;
3108 }
3109
3110 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3111 {
3112         __be32 *p;
3113         int status = 0;
3114
3115         *res = 0;
3116         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3117                 return -EIO;
3118         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3119                 READ_BUF(8);
3120                 p = xdr_decode_hyper(p, res);
3121                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3122         }
3123         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3124         return status;
3125 }
3126
3127 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3128 {
3129         __be32 *p;
3130         int status = 0;
3131
3132         *res = 0;
3133         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3134                 return -EIO;
3135         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3136                 READ_BUF(8);
3137                 p = xdr_decode_hyper(p, res);
3138                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3139         }
3140         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3141         return status;
3142 }
3143
3144 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3145 {
3146         __be32 *p;
3147         int status = 0;
3148
3149         *res = 0;
3150         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3151                 return -EIO;
3152         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3153                 READ_BUF(8);
3154                 p = xdr_decode_hyper(p, res);
3155                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3156         }
3157         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3158         return status;
3159 }
3160
3161 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3162 {
3163         __be32 *p;
3164         int ret = 0;
3165
3166         *used = 0;
3167         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3168                 return -EIO;
3169         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3170                 READ_BUF(8);
3171                 p = xdr_decode_hyper(p, used);
3172                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3173                 ret = NFS_ATTR_FATTR_SPACE_USED;
3174         }
3175         dprintk("%s: space used=%Lu\n", __func__,
3176                         (unsigned long long)*used);
3177         return ret;
3178 }
3179
3180 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3181 {
3182         __be32 *p;
3183         uint64_t sec;
3184         uint32_t nsec;
3185
3186         READ_BUF(12);
3187         p = xdr_decode_hyper(p, &sec);
3188         nsec = be32_to_cpup(p++);
3189         time->tv_sec = (time_t)sec;
3190         time->tv_nsec = (long)nsec;
3191         return 0;
3192 }
3193
3194 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3195 {
3196         int status = 0;
3197
3198         time->tv_sec = 0;
3199         time->tv_nsec = 0;
3200         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3201                 return -EIO;
3202         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3203                 status = decode_attr_time(xdr, time);
3204                 if (status == 0)
3205                         status = NFS_ATTR_FATTR_ATIME;
3206                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3207         }
3208         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3209         return status;
3210 }
3211
3212 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3213 {
3214         int status = 0;
3215
3216         time->tv_sec = 0;
3217         time->tv_nsec = 0;
3218         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3219                 return -EIO;
3220         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3221                 status = decode_attr_time(xdr, time);
3222                 if (status == 0)
3223                         status = NFS_ATTR_FATTR_CTIME;
3224                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3225         }
3226         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3227         return status;
3228 }
3229
3230 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3231 {
3232         int status = 0;
3233
3234         time->tv_sec = 0;
3235         time->tv_nsec = 0;
3236         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3237                 return -EIO;
3238         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3239                 status = decode_attr_time(xdr, time);
3240                 if (status == 0)
3241                         status = NFS_ATTR_FATTR_MTIME;
3242                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3243         }
3244         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3245         return status;
3246 }
3247
3248 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3249 {
3250         unsigned int attrwords = XDR_QUADLEN(attrlen);
3251         unsigned int nwords = xdr->p - savep;
3252
3253         if (unlikely(attrwords != nwords)) {
3254                 dprintk("%s: server returned incorrect attribute length: "
3255                         "%u %c %u\n",
3256                                 __func__,
3257                                 attrwords << 2,
3258                                 (attrwords < nwords) ? '<' : '>',
3259                                 nwords << 2);
3260                 return -EIO;
3261         }
3262         return 0;
3263 }
3264
3265 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3266 {
3267         __be32 *p;
3268
3269         READ_BUF(20);
3270         cinfo->atomic = be32_to_cpup(p++);
3271         p = xdr_decode_hyper(p, &cinfo->before);
3272         p = xdr_decode_hyper(p, &cinfo->after);
3273         return 0;
3274 }
3275
3276 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3277 {
3278         __be32 *p;
3279         uint32_t supp, acc;
3280         int status;
3281
3282         status = decode_op_hdr(xdr, OP_ACCESS);
3283         if (status)
3284                 return status;
3285         READ_BUF(8);
3286         supp = be32_to_cpup(p++);
3287         acc = be32_to_cpup(p++);
3288         access->supported = supp;
3289         access->access = acc;
3290         return 0;
3291 }
3292
3293 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3294 {
3295         __be32 *p;
3296
3297         p = xdr_inline_decode(xdr, len);
3298         if (likely(p)) {
3299                 memcpy(buf, p, len);
3300                 return 0;
3301         }
3302         print_overflow_msg(__func__, xdr);
3303         return -EIO;
3304 }
3305
3306 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3307 {
3308         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3309 }
3310
3311 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3312 {
3313         int status;
3314
3315         status = decode_op_hdr(xdr, OP_CLOSE);
3316         if (status != -EIO)
3317                 nfs_increment_open_seqid(status, res->seqid);
3318         if (!status)
3319                 status = decode_stateid(xdr, &res->stateid);
3320         return status;
3321 }
3322
3323 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3324 {
3325         __be32 *p;
3326         int status;
3327
3328         status = decode_op_hdr(xdr, OP_COMMIT);
3329         if (status)
3330                 return status;
3331         READ_BUF(8);
3332         COPYMEM(res->verf->verifier, 8);
3333         return 0;
3334 }
3335
3336 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3337 {
3338         __be32 *p;
3339         uint32_t bmlen;
3340         int status;
3341
3342         status = decode_op_hdr(xdr, OP_CREATE);
3343         if (status)
3344                 return status;
3345         if ((status = decode_change_info(xdr, cinfo)))
3346                 return status;
3347         READ_BUF(4);
3348         bmlen = be32_to_cpup(p++);
3349         READ_BUF(bmlen << 2);
3350         return 0;
3351 }
3352
3353 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3354 {
3355         __be32 *savep;
3356         uint32_t attrlen, bitmap[2] = {0};
3357         int status;
3358
3359         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3360                 goto xdr_error;
3361         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3362                 goto xdr_error;
3363         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3364                 goto xdr_error;
3365         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3366                 goto xdr_error;
3367         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3368                 goto xdr_error;
3369         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3370                 goto xdr_error;
3371         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3372                 goto xdr_error;
3373         status = verify_attr_len(xdr, savep, attrlen);
3374 xdr_error:
3375         dprintk("%s: xdr returned %d!\n", __func__, -status);
3376         return status;
3377 }
3378
3379 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3380 {
3381         __be32 *savep;
3382         uint32_t attrlen, bitmap[2] = {0};
3383         int status;
3384
3385         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3386                 goto xdr_error;
3387         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3388                 goto xdr_error;
3389         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3390                 goto xdr_error;
3391
3392         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3393                 goto xdr_error;
3394         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3395                 goto xdr_error;
3396         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3397                 goto xdr_error;
3398         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3399                 goto xdr_error;
3400         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3401                 goto xdr_error;
3402         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3403                 goto xdr_error;
3404
3405         status = verify_attr_len(xdr, savep, attrlen);
3406 xdr_error:
3407         dprintk("%s: xdr returned %d!\n", __func__, -status);
3408         return status;
3409 }
3410
3411 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3412 {
3413         __be32 *savep;
3414         uint32_t attrlen, bitmap[2] = {0};
3415         int status;
3416
3417         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3418                 goto xdr_error;
3419         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3420                 goto xdr_error;
3421         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3422                 goto xdr_error;
3423
3424         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3425                 goto xdr_error;
3426         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3427                 goto xdr_error;
3428
3429         status = verify_attr_len(xdr, savep, attrlen);
3430 xdr_error:
3431         dprintk("%s: xdr returned %d!\n", __func__, -status);
3432         return status;
3433 }
3434
3435 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3436 {
3437         __be32 *savep;
3438         uint32_t attrlen,
3439                  bitmap[2] = {0},
3440                  type;
3441         int status;
3442         umode_t fmode = 0;
3443         uint64_t fileid;
3444
3445         status = decode_op_hdr(xdr, OP_GETATTR);
3446         if (status < 0)
3447                 goto xdr_error;
3448
3449         status = decode_attr_bitmap(xdr, bitmap);
3450         if (status < 0)
3451                 goto xdr_error;
3452
3453         status = decode_attr_length(xdr, &attrlen, &savep);
3454         if (status < 0)
3455                 goto xdr_error;
3456
3457
3458         status = decode_attr_type(xdr, bitmap, &type);
3459         if (status < 0)
3460                 goto xdr_error;
3461         fattr->mode = 0;
3462         if (status != 0) {
3463                 fattr->mode |= nfs_type2fmt[type];
3464                 fattr->valid |= status;
3465         }
3466
3467         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3468         if (status < 0)
3469                 goto xdr_error;
3470         fattr->valid |= status;
3471
3472         status = decode_attr_size(xdr, bitmap, &fattr->size);
3473         if (status < 0)
3474                 goto xdr_error;
3475         fattr->valid |= status;
3476
3477         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3478         if (status < 0)
3479                 goto xdr_error;
3480         fattr->valid |= status;
3481
3482         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3483         if (status < 0)
3484                 goto xdr_error;
3485         fattr->valid |= status;
3486
3487         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3488                                                 struct nfs4_fs_locations,
3489                                                 fattr));
3490         if (status < 0)
3491                 goto xdr_error;
3492         fattr->valid |= status;
3493
3494         status = decode_attr_mode(xdr, bitmap, &fmode);
3495         if (status < 0)
3496                 goto xdr_error;
3497         if (status != 0) {
3498                 fattr->mode |= fmode;
3499                 fattr->valid |= status;
3500         }
3501
3502         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3503         if (status < 0)
3504                 goto xdr_error;
3505         fattr->valid |= status;
3506
3507         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3508         if (status < 0)
3509                 goto xdr_error;
3510         fattr->valid |= status;
3511
3512         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3513         if (status < 0)
3514                 goto xdr_error;
3515         fattr->valid |= status;
3516
3517         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3518         if (status < 0)
3519                 goto xdr_error;
3520         fattr->valid |= status;
3521
3522         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3523         if (status < 0)
3524                 goto xdr_error;
3525         fattr->valid |= status;
3526
3527         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3528         if (status < 0)
3529                 goto xdr_error;
3530         fattr->valid |= status;
3531
3532         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3533         if (status < 0)
3534                 goto xdr_error;
3535         fattr->valid |= status;
3536
3537         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3538         if (status < 0)
3539                 goto xdr_error;
3540         fattr->valid |= status;
3541
3542         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3543         if (status < 0)
3544                 goto xdr_error;
3545         if (status != 0 && !(fattr->valid & status)) {
3546                 fattr->fileid = fileid;
3547                 fattr->valid |= status;
3548         }
3549
3550         status = verify_attr_len(xdr, savep, attrlen);
3551 xdr_error:
3552         dprintk("%s: xdr returned %d\n", __func__, -status);
3553         return status;
3554 }
3555
3556
3557 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3558 {
3559         __be32 *savep;
3560         uint32_t attrlen, bitmap[2];
3561         int status;
3562
3563         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3564                 goto xdr_error;
3565         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3566                 goto xdr_error;
3567         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3568                 goto xdr_error;
3569
3570         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3571
3572         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3573                 goto xdr_error;
3574         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3575                 goto xdr_error;
3576         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3577                 goto xdr_error;
3578         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3579         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3580                 goto xdr_error;
3581         fsinfo->wtpref = fsinfo->wtmax;
3582
3583         status = verify_attr_len(xdr, savep, attrlen);
3584 xdr_error:
3585         dprintk("%s: xdr returned %d!\n", __func__, -status);
3586         return status;
3587 }
3588
3589 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3590 {
3591         __be32 *p;
3592         uint32_t len;
3593         int status;
3594
3595         /* Zero handle first to allow comparisons */
3596         memset(fh, 0, sizeof(*fh));
3597
3598         status = decode_op_hdr(xdr, OP_GETFH);
3599         if (status)
3600                 return status;
3601
3602         READ_BUF(4);
3603         len = be32_to_cpup(p++);
3604         if (len > NFS4_FHSIZE)
3605                 return -EIO;
3606         fh->size = len;
3607         READ_BUF(len);
3608         COPYMEM(fh->data, len);
3609         return 0;
3610 }
3611
3612 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3613 {
3614         int status;
3615
3616         status = decode_op_hdr(xdr, OP_LINK);
3617         if (status)
3618                 return status;
3619         return decode_change_info(xdr, cinfo);
3620 }
3621
3622 /*
3623  * We create the owner, so we know a proper owner.id length is 4.
3624  */
3625 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3626 {
3627         uint64_t offset, length, clientid;
3628         __be32 *p;
3629         uint32_t namelen, type;
3630
3631         READ_BUF(32);
3632         p = xdr_decode_hyper(p, &offset);
3633         p = xdr_decode_hyper(p, &length);
3634         type = be32_to_cpup(p++);
3635         if (fl != NULL) {
3636                 fl->fl_start = (loff_t)offset;
3637                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3638                 if (length == ~(uint64_t)0)
3639                         fl->fl_end = OFFSET_MAX;
3640                 fl->fl_type = F_WRLCK;
3641                 if (type & 1)
3642                         fl->fl_type = F_RDLCK;
3643                 fl->fl_pid = 0;
3644         }
3645         p = xdr_decode_hyper(p, &clientid);
3646         namelen = be32_to_cpup(p++);
3647         READ_BUF(namelen);
3648         return -NFS4ERR_DENIED;
3649 }
3650
3651 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3652 {
3653         int status;
3654
3655         status = decode_op_hdr(xdr, OP_LOCK);
3656         if (status == -EIO)
3657                 goto out;
3658         if (status == 0) {
3659                 status = decode_stateid(xdr, &res->stateid);
3660                 if (unlikely(status))
3661                         goto out;
3662         } else if (status == -NFS4ERR_DENIED)
3663                 status = decode_lock_denied(xdr, NULL);
3664         if (res->open_seqid != NULL)
3665                 nfs_increment_open_seqid(status, res->open_seqid);
3666         nfs_increment_lock_seqid(status, res->lock_seqid);
3667 out:
3668         return status;
3669 }
3670
3671 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3672 {
3673         int status;
3674         status = decode_op_hdr(xdr, OP_LOCKT);
3675         if (status == -NFS4ERR_DENIED)
3676                 return decode_lock_denied(xdr, res->denied);
3677         return status;
3678 }
3679
3680 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3681 {
3682         int status;
3683
3684         status = decode_op_hdr(xdr, OP_LOCKU);
3685         if (status != -EIO)
3686                 nfs_increment_lock_seqid(status, res->seqid);
3687         if (status == 0)
3688                 status = decode_stateid(xdr, &res->stateid);
3689         return status;
3690 }
3691
3692 static int decode_lookup(struct xdr_stream *xdr)
3693 {
3694         return decode_op_hdr(xdr, OP_LOOKUP);
3695 }
3696
3697 /* This is too sick! */
3698 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3699 {
3700         __be32 *p;
3701         uint32_t limit_type, nblocks, blocksize;
3702
3703         READ_BUF(12);
3704         limit_type = be32_to_cpup(p++);
3705         switch (limit_type) {
3706         case 1:
3707                 p = xdr_decode_hyper(p, maxsize);
3708                 break;
3709         case 2:
3710                 nblocks = be32_to_cpup(p++);
3711                 blocksize = be32_to_cpup(p++);
3712                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3713         }
3714         return 0;
3715 }
3716
3717 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3718 {
3719         __be32 *p;
3720         uint32_t delegation_type;
3721         int status;
3722
3723         READ_BUF(4);
3724         delegation_type = be32_to_cpup(p++);
3725         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3726                 res->delegation_type = 0;
3727                 return 0;
3728         }
3729         status = decode_stateid(xdr, &res->delegation);
3730         if (unlikely(status))
3731                 return status;
3732         READ_BUF(4);
3733         res->do_recall = be32_to_cpup(p++);
3734
3735         switch (delegation_type) {
3736         case NFS4_OPEN_DELEGATE_READ:
3737                 res->delegation_type = FMODE_READ;
3738                 break;
3739         case NFS4_OPEN_DELEGATE_WRITE:
3740                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3741                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3742                                 return -EIO;
3743         }
3744         return decode_ace(xdr, NULL, res->server->nfs_client);
3745 }
3746
3747 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3748 {
3749         __be32 *p;
3750         uint32_t savewords, bmlen, i;
3751         int status;
3752
3753         status = decode_op_hdr(xdr, OP_OPEN);
3754         if (status != -EIO)
3755                 nfs_increment_open_seqid(status, res->seqid);
3756         if (!status)
3757                 status = decode_stateid(xdr, &res->stateid);
3758         if (unlikely(status))
3759                 return status;
3760
3761         decode_change_info(xdr, &res->cinfo);
3762
3763         READ_BUF(8);
3764         res->rflags = be32_to_cpup(p++);
3765         bmlen = be32_to_cpup(p++);
3766         if (bmlen > 10)
3767                 goto xdr_error;
3768
3769         READ_BUF(bmlen << 2);
3770         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3771         for (i = 0; i < savewords; ++i)
3772                 res->attrset[i] = be32_to_cpup(p++);
3773         for (; i < NFS4_BITMAP_SIZE; i++)
3774                 res->attrset[i] = 0;
3775
3776         return decode_delegation(xdr, res);
3777 xdr_error:
3778         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3779         return -EIO;
3780 }
3781
3782 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3783 {
3784         int status;
3785
3786         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3787         if (status != -EIO)
3788                 nfs_increment_open_seqid(status, res->seqid);
3789         if (!status)
3790                 status = decode_stateid(xdr, &res->stateid);
3791         return status;
3792 }
3793
3794 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3795 {
3796         int status;
3797
3798         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3799         if (status != -EIO)
3800                 nfs_increment_open_seqid(status, res->seqid);
3801         if (!status)
3802                 status = decode_stateid(xdr, &res->stateid);
3803         return status;
3804 }
3805
3806 static int decode_putfh(struct xdr_stream *xdr)
3807 {
3808         return decode_op_hdr(xdr, OP_PUTFH);
3809 }
3810
3811 static int decode_putrootfh(struct xdr_stream *xdr)
3812 {
3813         return decode_op_hdr(xdr, OP_PUTROOTFH);
3814 }
3815
3816 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3817 {
3818         struct kvec *iov = req->rq_rcv_buf.head;
3819         __be32 *p;
3820         uint32_t count, eof, recvd, hdrlen;
3821         int status;
3822
3823         status = decode_op_hdr(xdr, OP_READ);
3824         if (status)
3825                 return status;
3826         READ_BUF(8);
3827         eof = be32_to_cpup(p++);
3828         count = be32_to_cpup(p++);
3829         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3830         recvd = req->rq_rcv_buf.len - hdrlen;
3831         if (count > recvd) {
3832                 dprintk("NFS: server cheating in read reply: "
3833                                 "count %u > recvd %u\n", count, recvd);
3834                 count = recvd;
3835                 eof = 0;
3836         }
3837         xdr_read_pages(xdr, count);
3838         res->eof = eof;
3839         res->count = count;
3840         return 0;
3841 }
3842
3843 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3844 {
3845         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3846         struct page     *page = *rcvbuf->pages;
3847         struct kvec     *iov = rcvbuf->head;
3848         size_t          hdrlen;
3849         u32             recvd, pglen = rcvbuf->page_len;
3850         __be32          *end, *entry, *p, *kaddr;
3851         unsigned int    nr = 0;
3852         int             status;
3853
3854         status = decode_op_hdr(xdr, OP_READDIR);
3855         if (status)
3856                 return status;
3857         READ_BUF(8);
3858         COPYMEM(readdir->verifier.data, 8);
3859         dprintk("%s: verifier = %08x:%08x\n",
3860                         __func__,
3861                         ((u32 *)readdir->verifier.data)[0],
3862                         ((u32 *)readdir->verifier.data)[1]);
3863
3864
3865         hdrlen = (char *) p - (char *) iov->iov_base;
3866         recvd = rcvbuf->len - hdrlen;
3867         if (pglen > recvd)
3868                 pglen = recvd;
3869         xdr_read_pages(xdr, pglen);
3870
3871         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3872         kaddr = p = kmap_atomic(page, KM_USER0);
3873         end = p + ((pglen + readdir->pgbase) >> 2);
3874         entry = p;
3875
3876         /* Make sure the packet actually has a value_follows and EOF entry */
3877         if ((entry + 1) > end)
3878                 goto short_pkt;
3879
3880         for (; *p++; nr++) {
3881                 u32 len, attrlen, xlen;
3882                 if (end - p < 3)
3883                         goto short_pkt;
3884                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3885                 p += 2;                 /* cookie */
3886                 len = ntohl(*p++);      /* filename length */
3887                 if (len > NFS4_MAXNAMLEN) {
3888                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3889                                         len);
3890                         goto err_unmap;
3891                 }
3892                 xlen = XDR_QUADLEN(len);
3893                 if (end - p < xlen + 1)
3894                         goto short_pkt;
3895                 dprintk("filename = %*s\n", len, (char *)p);
3896                 p += xlen;
3897                 len = ntohl(*p++);      /* bitmap length */
3898                 if (end - p < len + 1)
3899                         goto short_pkt;
3900                 p += len;
3901                 attrlen = XDR_QUADLEN(ntohl(*p++));
3902                 if (end - p < attrlen + 2)
3903                         goto short_pkt;
3904                 p += attrlen;           /* attributes */
3905                 entry = p;
3906         }
3907         /*
3908          * Apparently some server sends responses that are a valid size, but
3909          * contain no entries, and have value_follows==0 and EOF==0. For
3910          * those, just set the EOF marker.
3911          */
3912         if (!nr && entry[1] == 0) {
3913                 dprintk("NFS: readdir reply truncated!\n");
3914                 entry[1] = 1;
3915         }
3916 out:
3917         kunmap_atomic(kaddr, KM_USER0);
3918         return 0;
3919 short_pkt:
3920         /*
3921          * When we get a short packet there are 2 possibilities. We can
3922          * return an error, or fix up the response to look like a valid
3923          * response and return what we have so far. If there are no
3924          * entries and the packet was short, then return -EIO. If there
3925          * are valid entries in the response, return them and pretend that
3926          * the call was successful, but incomplete. The caller can retry the
3927          * readdir starting at the last cookie.
3928          */
3929         dprintk("%s: short packet at entry %d\n", __func__, nr);
3930         entry[0] = entry[1] = 0;
3931         if (nr)
3932                 goto out;
3933 err_unmap:
3934         kunmap_atomic(kaddr, KM_USER0);
3935         return -errno_NFSERR_IO;
3936 }
3937
3938 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3939 {
3940         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3941         struct kvec *iov = rcvbuf->head;
3942         size_t hdrlen;
3943         u32 len, recvd;
3944         __be32 *p;
3945         char *kaddr;
3946         int status;
3947
3948         status = decode_op_hdr(xdr, OP_READLINK);
3949         if (status)
3950                 return status;
3951
3952         /* Convert length of symlink */
3953         READ_BUF(4);
3954         len = be32_to_cpup(p++);
3955         if (len >= rcvbuf->page_len || len <= 0) {
3956                 dprintk("nfs: server returned giant symlink!\n");
3957                 return -ENAMETOOLONG;
3958         }
3959         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3960         recvd = req->rq_rcv_buf.len - hdrlen;
3961         if (recvd < len) {
3962                 dprintk("NFS: server cheating in readlink reply: "
3963                                 "count %u > recvd %u\n", len, recvd);
3964                 return -EIO;
3965         }
3966         xdr_read_pages(xdr, len);
3967         /*
3968          * The XDR encode routine has set things up so that
3969          * the link text will be copied directly into the
3970          * buffer.  We just have to do overflow-checking,
3971          * and and null-terminate the text (the VFS expects
3972          * null-termination).
3973          */
3974         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3975         kaddr[len+rcvbuf->page_base] = '\0';
3976         kunmap_atomic(kaddr, KM_USER0);
3977         return 0;
3978 }
3979
3980 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3981 {
3982         int status;
3983
3984         status = decode_op_hdr(xdr, OP_REMOVE);
3985         if (status)
3986                 goto out;
3987         status = decode_change_info(xdr, cinfo);
3988 out:
3989         return status;
3990 }
3991
3992 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3993               struct nfs4_change_info *new_cinfo)
3994 {
3995         int status;
3996
3997         status = decode_op_hdr(xdr, OP_RENAME);
3998         if (status)
3999                 goto out;
4000         if ((status = decode_change_info(xdr, old_cinfo)))
4001                 goto out;
4002         status = decode_change_info(xdr, new_cinfo);
4003 out:
4004         return status;
4005 }
4006
4007 static int decode_renew(struct xdr_stream *xdr)
4008 {
4009         return decode_op_hdr(xdr, OP_RENEW);
4010 }
4011
4012 static int
4013 decode_restorefh(struct xdr_stream *xdr)
4014 {
4015         return decode_op_hdr(xdr, OP_RESTOREFH);
4016 }
4017
4018 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4019                 size_t *acl_len)
4020 {
4021         __be32 *savep;
4022         uint32_t attrlen,
4023                  bitmap[2] = {0};
4024         struct kvec *iov = req->rq_rcv_buf.head;
4025         int status;
4026
4027         *acl_len = 0;
4028         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4029                 goto out;
4030         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4031                 goto out;
4032         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4033                 goto out;
4034
4035         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4036                 return -EIO;
4037         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4038                 size_t hdrlen;
4039                 u32 recvd;
4040
4041                 /* We ignore &savep and don't do consistency checks on
4042                  * the attr length.  Let userspace figure it out.... */
4043                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4044                 recvd = req->rq_rcv_buf.len - hdrlen;
4045                 if (attrlen > recvd) {
4046                         dprintk("NFS: server cheating in getattr"
4047                                         " acl reply: attrlen %u > recvd %u\n",
4048                                         attrlen, recvd);
4049                         return -EINVAL;
4050                 }
4051                 xdr_read_pages(xdr, attrlen);
4052                 *acl_len = attrlen;
4053         } else
4054                 status = -EOPNOTSUPP;
4055
4056 out:
4057         return status;
4058 }
4059
4060 static int
4061 decode_savefh(struct xdr_stream *xdr)
4062 {
4063         return decode_op_hdr(xdr, OP_SAVEFH);
4064 }
4065
4066 static int decode_setattr(struct xdr_stream *xdr)
4067 {
4068         __be32 *p;
4069         uint32_t bmlen;
4070         int status;
4071
4072         status = decode_op_hdr(xdr, OP_SETATTR);
4073         if (status)
4074                 return status;
4075         READ_BUF(4);
4076         bmlen = be32_to_cpup(p++);
4077         READ_BUF(bmlen << 2);
4078         return 0;
4079 }
4080
4081 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4082 {
4083         __be32 *p;
4084         uint32_t opnum;
4085         int32_t nfserr;
4086
4087         READ_BUF(8);
4088         opnum = be32_to_cpup(p++);
4089         if (opnum != OP_SETCLIENTID) {
4090                 dprintk("nfs: decode_setclientid: Server returned operation"
4091                         " %d\n", opnum);
4092                 return -EIO;
4093         }
4094         nfserr = be32_to_cpup(p++);
4095         if (nfserr == NFS_OK) {
4096                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4097                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4098                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4099         } else if (nfserr == NFSERR_CLID_INUSE) {
4100                 uint32_t len;
4101
4102                 /* skip netid string */
4103                 READ_BUF(4);
4104                 len = be32_to_cpup(p++);
4105                 READ_BUF(len);
4106
4107                 /* skip uaddr string */
4108                 READ_BUF(4);
4109                 len = be32_to_cpup(p++);
4110                 READ_BUF(len);
4111                 return -NFSERR_CLID_INUSE;
4112         } else
4113                 return nfs4_stat_to_errno(nfserr);
4114
4115         return 0;
4116 }
4117
4118 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4119 {
4120         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4121 }
4122
4123 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4124 {
4125         __be32 *p;
4126         int status;
4127
4128         status = decode_op_hdr(xdr, OP_WRITE);
4129         if (status)
4130                 return status;
4131
4132         READ_BUF(16);
4133         res->count = be32_to_cpup(p++);
4134         res->verf->committed = be32_to_cpup(p++);
4135         COPYMEM(res->verf->verifier, 8);
4136         return 0;
4137 }
4138
4139 static int decode_delegreturn(struct xdr_stream *xdr)
4140 {
4141         return decode_op_hdr(xdr, OP_DELEGRETURN);
4142 }
4143
4144 #if defined(CONFIG_NFS_V4_1)
4145 static int decode_exchange_id(struct xdr_stream *xdr,
4146                               struct nfs41_exchange_id_res *res)
4147 {
4148         __be32 *p;
4149         uint32_t dummy;
4150         int status;
4151         struct nfs_client *clp = res->client;
4152
4153         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4154         if (status)
4155                 return status;
4156
4157         READ_BUF(8);
4158         p = xdr_decode_hyper(p, &clp->cl_ex_clid);
4159         READ_BUF(12);
4160         clp->cl_seqid = be32_to_cpup(p++);
4161         clp->cl_exchange_flags = be32_to_cpup(p++);
4162
4163         /* We ask for SP4_NONE */
4164         dummy = be32_to_cpup(p++);
4165         if (dummy != SP4_NONE)
4166                 return -EIO;
4167
4168         /* Throw away minor_id */
4169         READ_BUF(8);
4170
4171         /* Throw away Major id */
4172         READ_BUF(4);
4173         dummy = be32_to_cpup(p++);
4174         READ_BUF(dummy);
4175
4176         /* Throw away server_scope */
4177         READ_BUF(4);
4178         dummy = be32_to_cpup(p++);
4179         READ_BUF(dummy);
4180
4181         /* Throw away Implementation id array */
4182         READ_BUF(4);
4183         dummy = be32_to_cpup(p++);
4184         READ_BUF(dummy);
4185
4186         return 0;
4187 }
4188
4189 static int decode_chan_attrs(struct xdr_stream *xdr,
4190                              struct nfs4_channel_attrs *attrs)
4191 {
4192         __be32 *p;
4193         u32 nr_attrs;
4194
4195         READ_BUF(28);
4196         attrs->headerpadsz = be32_to_cpup(p++);
4197         attrs->max_rqst_sz = be32_to_cpup(p++);
4198         attrs->max_resp_sz = be32_to_cpup(p++);
4199         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4200         attrs->max_ops = be32_to_cpup(p++);
4201         attrs->max_reqs = be32_to_cpup(p++);
4202         nr_attrs = be32_to_cpup(p++);
4203         if (unlikely(nr_attrs > 1)) {
4204                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4205                         __func__, nr_attrs);
4206                 return -EINVAL;
4207         }
4208         if (nr_attrs == 1)
4209                 READ_BUF(4); /* skip rdma_attrs */
4210         return 0;
4211 }
4212
4213 static int decode_create_session(struct xdr_stream *xdr,
4214                                  struct nfs41_create_session_res *res)
4215 {
4216         __be32 *p;
4217         int status;
4218         struct nfs_client *clp = res->client;
4219         struct nfs4_session *session = clp->cl_session;
4220
4221         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4222
4223         if (status)
4224                 return status;
4225
4226         /* sessionid */
4227         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4228         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4229
4230         /* seqid, flags */
4231         READ_BUF(8);
4232         clp->cl_seqid = be32_to_cpup(p++);
4233         session->flags = be32_to_cpup(p++);
4234
4235         /* Channel attributes */
4236         status = decode_chan_attrs(xdr, &session->fc_attrs);
4237         if (!status)
4238                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4239         return status;
4240 }
4241
4242 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4243 {
4244         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4245 }
4246 #endif /* CONFIG_NFS_V4_1 */
4247
4248 static int decode_sequence(struct xdr_stream *xdr,
4249                            struct nfs4_sequence_res *res,
4250                            struct rpc_rqst *rqstp)
4251 {
4252 #if defined(CONFIG_NFS_V4_1)
4253         struct nfs4_slot *slot;
4254         struct nfs4_sessionid id;
4255         u32 dummy;
4256         int status;
4257         __be32 *p;
4258
4259         if (!res->sr_session)
4260                 return 0;
4261
4262         status = decode_op_hdr(xdr, OP_SEQUENCE);
4263         if (status)
4264                 goto out_err;
4265
4266         /*
4267          * If the server returns different values for sessionID, slotID or
4268          * sequence number, the server is looney tunes.
4269          */
4270         status = -ESERVERFAULT;
4271
4272         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4273         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4274         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4275         if (memcmp(id.data, res->sr_session->sess_id.data,
4276                    NFS4_MAX_SESSIONID_LEN)) {
4277                 dprintk("%s Invalid session id\n", __func__);
4278                 goto out_err;
4279         }
4280         /* seqid */
4281         dummy = be32_to_cpup(p++);
4282         if (dummy != slot->seq_nr) {
4283                 dprintk("%s Invalid sequence number\n", __func__);
4284                 goto out_err;
4285         }
4286         /* slot id */
4287         dummy = be32_to_cpup(p++);
4288         if (dummy != res->sr_slotid) {
4289                 dprintk("%s Invalid slot id\n", __func__);
4290                 goto out_err;
4291         }
4292         /* highest slot id - currently not processed */
4293         dummy = be32_to_cpup(p++);
4294         /* target highest slot id - currently not processed */
4295         dummy = be32_to_cpup(p++);
4296         /* result flags - currently not processed */
4297         dummy = be32_to_cpup(p++);
4298         status = 0;
4299 out_err:
4300         res->sr_status = status;
4301         return status;
4302 #else  /* CONFIG_NFS_V4_1 */
4303         return 0;
4304 #endif /* CONFIG_NFS_V4_1 */
4305 }
4306
4307 /*
4308  * END OF "GENERIC" DECODE ROUTINES.
4309  */
4310
4311 /*
4312  * Decode OPEN_DOWNGRADE response
4313  */
4314 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4315 {
4316         struct xdr_stream xdr;
4317         struct compound_hdr hdr;
4318         int status;
4319
4320         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4321         status = decode_compound_hdr(&xdr, &hdr);
4322         if (status)
4323                 goto out;
4324         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4325         if (status)
4326                 goto out;
4327         status = decode_putfh(&xdr);
4328         if (status)
4329                 goto out;
4330         status = decode_open_downgrade(&xdr, res);
4331         if (status != 0)
4332                 goto out;
4333         decode_getfattr(&xdr, res->fattr, res->server);
4334 out:
4335         return status;
4336 }
4337
4338 /*
4339  * Decode ACCESS response
4340  */
4341 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4342 {
4343         struct xdr_stream xdr;
4344         struct compound_hdr hdr;
4345         int status;
4346
4347         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4348         status = decode_compound_hdr(&xdr, &hdr);
4349         if (status)
4350                 goto out;
4351         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4352         if (status)
4353                 goto out;
4354         status = decode_putfh(&xdr);
4355         if (status != 0)
4356                 goto out;
4357         status = decode_access(&xdr, res);
4358         if (status != 0)
4359                 goto out;
4360         decode_getfattr(&xdr, res->fattr, res->server);
4361 out:
4362         return status;
4363 }
4364
4365 /*
4366  * Decode LOOKUP response
4367  */
4368 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4369 {
4370         struct xdr_stream xdr;
4371         struct compound_hdr hdr;
4372         int status;
4373
4374         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4375         status = decode_compound_hdr(&xdr, &hdr);
4376         if (status)
4377                 goto out;
4378         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4379         if (status)
4380                 goto out;
4381         if ((status = decode_putfh(&xdr)) != 0)
4382                 goto out;
4383         if ((status = decode_lookup(&xdr)) != 0)
4384                 goto out;
4385         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4386                 goto out;
4387         status = decode_getfattr(&xdr, res->fattr, res->server);
4388 out:
4389         return status;
4390 }
4391
4392 /*
4393  * Decode LOOKUP_ROOT response
4394  */
4395 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4396 {
4397         struct xdr_stream xdr;
4398         struct compound_hdr hdr;
4399         int status;
4400
4401         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4402         status = decode_compound_hdr(&xdr, &hdr);
4403         if (status)
4404                 goto out;
4405         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4406         if (status)
4407                 goto out;
4408         if ((status = decode_putrootfh(&xdr)) != 0)
4409                 goto out;
4410         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4411                 status = decode_getfattr(&xdr, res->fattr, res->server);
4412 out:
4413         return status;
4414 }
4415
4416 /*
4417  * Decode REMOVE response
4418  */
4419 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4420 {
4421         struct xdr_stream xdr;
4422         struct compound_hdr hdr;
4423         int status;
4424
4425         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4426         status = decode_compound_hdr(&xdr, &hdr);
4427         if (status)
4428                 goto out;
4429         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4430         if (status)
4431                 goto out;
4432         if ((status = decode_putfh(&xdr)) != 0)
4433                 goto out;
4434         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4435                 goto out;
4436         decode_getfattr(&xdr, &res->dir_attr, res->server);
4437 out:
4438         return status;
4439 }
4440
4441 /*
4442  * Decode RENAME response
4443  */
4444 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4445 {
4446         struct xdr_stream xdr;
4447         struct compound_hdr hdr;
4448         int status;
4449
4450         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4451         status = decode_compound_hdr(&xdr, &hdr);
4452         if (status)
4453                 goto out;
4454         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4455         if (status)
4456                 goto out;
4457         if ((status = decode_putfh(&xdr)) != 0)
4458                 goto out;
4459         if ((status = decode_savefh(&xdr)) != 0)
4460                 goto out;
4461         if ((status = decode_putfh(&xdr)) != 0)
4462                 goto out;
4463         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4464                 goto out;
4465         /* Current FH is target directory */
4466         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4467                 goto out;
4468         if ((status = decode_restorefh(&xdr)) != 0)
4469                 goto out;
4470         decode_getfattr(&xdr, res->old_fattr, res->server);
4471 out:
4472         return status;
4473 }
4474
4475 /*
4476  * Decode LINK response
4477  */
4478 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4479 {
4480         struct xdr_stream xdr;
4481         struct compound_hdr hdr;
4482         int status;
4483
4484         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4485         status = decode_compound_hdr(&xdr, &hdr);
4486         if (status)
4487                 goto out;
4488         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4489         if (status)
4490                 goto out;
4491         if ((status = decode_putfh(&xdr)) != 0)
4492                 goto out;
4493         if ((status = decode_savefh(&xdr)) != 0)
4494                 goto out;
4495         if ((status = decode_putfh(&xdr)) != 0)
4496                 goto out;
4497         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4498                 goto out;
4499         /*
4500          * Note order: OP_LINK leaves the directory as the current
4501          *             filehandle.
4502          */
4503         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4504                 goto out;
4505         if ((status = decode_restorefh(&xdr)) != 0)
4506                 goto out;
4507         decode_getfattr(&xdr, res->fattr, res->server);
4508 out:
4509         return status;
4510 }
4511
4512 /*
4513  * Decode CREATE response
4514  */
4515 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4516 {
4517         struct xdr_stream xdr;
4518         struct compound_hdr hdr;
4519         int status;
4520
4521         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4522         status = decode_compound_hdr(&xdr, &hdr);
4523         if (status)
4524                 goto out;
4525         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4526         if (status)
4527                 goto out;
4528         if ((status = decode_putfh(&xdr)) != 0)
4529                 goto out;
4530         if ((status = decode_savefh(&xdr)) != 0)
4531                 goto out;
4532         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4533                 goto out;
4534         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4535                 goto out;
4536         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4537                 goto out;
4538         if ((status = decode_restorefh(&xdr)) != 0)
4539                 goto out;
4540         decode_getfattr(&xdr, res->dir_fattr, res->server);
4541 out:
4542         return status;
4543 }
4544
4545 /*
4546  * Decode SYMLINK response
4547  */
4548 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4549 {
4550         return nfs4_xdr_dec_create(rqstp, p, res);
4551 }
4552
4553 /*
4554  * Decode GETATTR response
4555  */
4556 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4557 {
4558         struct xdr_stream xdr;
4559         struct compound_hdr hdr;
4560         int status;
4561
4562         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4563         status = decode_compound_hdr(&xdr, &hdr);
4564         if (status)
4565                 goto out;
4566         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4567         if (status)
4568                 goto out;
4569         status = decode_putfh(&xdr);
4570         if (status)
4571                 goto out;
4572         status = decode_getfattr(&xdr, res->fattr, res->server);
4573 out:
4574         return status;
4575 }
4576
4577 /*
4578  * Encode an SETACL request
4579  */
4580 static int
4581 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4582 {
4583         struct xdr_stream xdr;
4584         struct compound_hdr hdr = {
4585                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4586         };
4587         int status;
4588
4589         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4590         encode_compound_hdr(&xdr, req, &hdr);
4591         encode_sequence(&xdr, &args->seq_args, &hdr);
4592         encode_putfh(&xdr, args->fh, &hdr);
4593         status = encode_setacl(&xdr, args, &hdr);
4594         encode_nops(&hdr);
4595         return status;
4596 }
4597
4598 /*
4599  * Decode SETACL response
4600  */
4601 static int
4602 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4603                     struct nfs_setaclres *res)
4604 {
4605         struct xdr_stream xdr;
4606         struct compound_hdr hdr;
4607         int status;
4608
4609         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4610         status = decode_compound_hdr(&xdr, &hdr);
4611         if (status)
4612                 goto out;
4613         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4614         if (status)
4615                 goto out;
4616         status = decode_putfh(&xdr);
4617         if (status)
4618                 goto out;
4619         status = decode_setattr(&xdr);
4620 out:
4621         return status;
4622 }
4623
4624 /*
4625  * Decode GETACL response
4626  */
4627 static int
4628 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4629                     struct nfs_getaclres *res)
4630 {
4631         struct xdr_stream xdr;
4632         struct compound_hdr hdr;
4633         int status;
4634
4635         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4636         status = decode_compound_hdr(&xdr, &hdr);
4637         if (status)
4638                 goto out;
4639         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4640         if (status)
4641                 goto out;
4642         status = decode_putfh(&xdr);
4643         if (status)
4644                 goto out;
4645         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4646
4647 out:
4648         return status;
4649 }
4650
4651 /*
4652  * Decode CLOSE response
4653  */
4654 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4655 {
4656         struct xdr_stream xdr;
4657         struct compound_hdr hdr;
4658         int status;
4659
4660         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4661         status = decode_compound_hdr(&xdr, &hdr);
4662         if (status)
4663                 goto out;
4664         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4665         if (status)
4666                 goto out;
4667         status = decode_putfh(&xdr);
4668         if (status)
4669                 goto out;
4670         status = decode_close(&xdr, res);
4671         if (status != 0)
4672                 goto out;
4673         /*
4674          * Note: Server may do delete on close for this file
4675          *      in which case the getattr call will fail with
4676          *      an ESTALE error. Shouldn't be a problem,
4677          *      though, since fattr->valid will remain unset.
4678          */
4679         decode_getfattr(&xdr, res->fattr, res->server);
4680 out:
4681         return status;
4682 }
4683
4684 /*
4685  * Decode OPEN response
4686  */
4687 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4688 {
4689         struct xdr_stream xdr;
4690         struct compound_hdr hdr;
4691         int status;
4692
4693         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4694         status = decode_compound_hdr(&xdr, &hdr);
4695         if (status)
4696                 goto out;
4697         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4698         if (status)
4699                 goto out;
4700         status = decode_putfh(&xdr);
4701         if (status)
4702                 goto out;
4703         status = decode_savefh(&xdr);
4704         if (status)
4705                 goto out;
4706         status = decode_open(&xdr, res);
4707         if (status)
4708                 goto out;
4709         if (decode_getfh(&xdr, &res->fh) != 0)
4710                 goto out;
4711         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4712                 goto out;
4713         if (decode_restorefh(&xdr) != 0)
4714                 goto out;
4715         decode_getfattr(&xdr, res->dir_attr, res->server);
4716 out:
4717         return status;
4718 }
4719
4720 /*
4721  * Decode OPEN_CONFIRM response
4722  */
4723 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4724 {
4725         struct xdr_stream xdr;
4726         struct compound_hdr hdr;
4727         int status;
4728
4729         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4730         status = decode_compound_hdr(&xdr, &hdr);
4731         if (status)
4732                 goto out;
4733         status = decode_putfh(&xdr);
4734         if (status)
4735                 goto out;
4736         status = decode_open_confirm(&xdr, res);
4737 out:
4738         return status;
4739 }
4740
4741 /*
4742  * Decode OPEN response
4743  */
4744 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4745 {
4746         struct xdr_stream xdr;
4747         struct compound_hdr hdr;
4748         int status;
4749
4750         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4751         status = decode_compound_hdr(&xdr, &hdr);
4752         if (status)
4753                 goto out;
4754         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4755         if (status)
4756                 goto out;
4757         status = decode_putfh(&xdr);
4758         if (status)
4759                 goto out;
4760         status = decode_open(&xdr, res);
4761         if (status)
4762                 goto out;
4763         decode_getfattr(&xdr, res->f_attr, res->server);
4764 out:
4765         return status;
4766 }
4767
4768 /*
4769  * Decode SETATTR response
4770  */
4771 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4772 {
4773         struct xdr_stream xdr;
4774         struct compound_hdr hdr;
4775         int status;
4776
4777         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4778         status = decode_compound_hdr(&xdr, &hdr);
4779         if (status)
4780                 goto out;
4781         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4782         if (status)
4783                 goto out;
4784         status = decode_putfh(&xdr);
4785         if (status)
4786                 goto out;
4787         status = decode_setattr(&xdr);
4788         if (status)
4789                 goto out;
4790         decode_getfattr(&xdr, res->fattr, res->server);
4791 out:
4792         return status;
4793 }
4794
4795 /*
4796  * Decode LOCK response
4797  */
4798 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4799 {
4800         struct xdr_stream xdr;
4801         struct compound_hdr hdr;
4802         int status;
4803
4804         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4805         status = decode_compound_hdr(&xdr, &hdr);
4806         if (status)
4807                 goto out;
4808         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4809         if (status)
4810                 goto out;
4811         status = decode_putfh(&xdr);
4812         if (status)
4813                 goto out;
4814         status = decode_lock(&xdr, res);
4815 out:
4816         return status;
4817 }
4818
4819 /*
4820  * Decode LOCKT response
4821  */
4822 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4823 {
4824         struct xdr_stream xdr;
4825         struct compound_hdr hdr;
4826         int status;
4827
4828         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4829         status = decode_compound_hdr(&xdr, &hdr);
4830         if (status)
4831                 goto out;
4832         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4833         if (status)
4834                 goto out;
4835         status = decode_putfh(&xdr);
4836         if (status)
4837                 goto out;
4838         status = decode_lockt(&xdr, res);
4839 out:
4840         return status;
4841 }
4842
4843 /*
4844  * Decode LOCKU response
4845  */
4846 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4847 {
4848         struct xdr_stream xdr;
4849         struct compound_hdr hdr;
4850         int status;
4851
4852         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4853         status = decode_compound_hdr(&xdr, &hdr);
4854         if (status)
4855                 goto out;
4856         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4857         if (status)
4858                 goto out;
4859         status = decode_putfh(&xdr);
4860         if (status)
4861                 goto out;
4862         status = decode_locku(&xdr, res);
4863 out:
4864         return status;
4865 }
4866
4867 /*
4868  * Decode READLINK response
4869  */
4870 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4871                                  struct nfs4_readlink_res *res)
4872 {
4873         struct xdr_stream xdr;
4874         struct compound_hdr hdr;
4875         int status;
4876
4877         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4878         status = decode_compound_hdr(&xdr, &hdr);
4879         if (status)
4880                 goto out;
4881         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4882         if (status)
4883                 goto out;
4884         status = decode_putfh(&xdr);
4885         if (status)
4886                 goto out;
4887         status = decode_readlink(&xdr, rqstp);
4888 out:
4889         return status;
4890 }
4891
4892 /*
4893  * Decode READDIR response
4894  */
4895 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4896 {
4897         struct xdr_stream xdr;
4898         struct compound_hdr hdr;
4899         int status;
4900
4901         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4902         status = decode_compound_hdr(&xdr, &hdr);
4903         if (status)
4904                 goto out;
4905         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4906         if (status)
4907                 goto out;
4908         status = decode_putfh(&xdr);
4909         if (status)
4910                 goto out;
4911         status = decode_readdir(&xdr, rqstp, res);
4912 out:
4913         return status;
4914 }
4915
4916 /*
4917  * Decode Read response
4918  */
4919 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4920 {
4921         struct xdr_stream xdr;
4922         struct compound_hdr hdr;
4923         int status;
4924
4925         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4926         status = decode_compound_hdr(&xdr, &hdr);
4927         if (status)
4928                 goto out;
4929         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4930         if (status)
4931                 goto out;
4932         status = decode_putfh(&xdr);
4933         if (status)
4934                 goto out;
4935         status = decode_read(&xdr, rqstp, res);
4936         if (!status)
4937                 status = res->count;
4938 out:
4939         return status;
4940 }
4941
4942 /*
4943  * Decode WRITE response
4944  */
4945 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4946 {
4947         struct xdr_stream xdr;
4948         struct compound_hdr hdr;
4949         int status;
4950
4951         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4952         status = decode_compound_hdr(&xdr, &hdr);
4953         if (status)
4954                 goto out;
4955         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4956         if (status)
4957                 goto out;
4958         status = decode_putfh(&xdr);
4959         if (status)
4960                 goto out;
4961         status = decode_write(&xdr, res);
4962         if (status)
4963                 goto out;
4964         decode_getfattr(&xdr, res->fattr, res->server);
4965         if (!status)
4966                 status = res->count;
4967 out:
4968         return status;
4969 }
4970
4971 /*
4972  * Decode COMMIT response
4973  */
4974 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4975 {
4976         struct xdr_stream xdr;
4977         struct compound_hdr hdr;
4978         int status;
4979
4980         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4981         status = decode_compound_hdr(&xdr, &hdr);
4982         if (status)
4983                 goto out;
4984         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4985         if (status)
4986                 goto out;
4987         status = decode_putfh(&xdr);
4988         if (status)
4989                 goto out;
4990         status = decode_commit(&xdr, res);
4991         if (status)
4992                 goto out;
4993         decode_getfattr(&xdr, res->fattr, res->server);
4994 out:
4995         return status;
4996 }
4997
4998 /*
4999  * FSINFO request
5000  */
5001 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5002                                struct nfs4_fsinfo_res *res)
5003 {
5004         struct xdr_stream xdr;
5005         struct compound_hdr hdr;
5006         int status;
5007
5008         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5009         status = decode_compound_hdr(&xdr, &hdr);
5010         if (!status)
5011                 status = decode_sequence(&xdr, &res->seq_res, req);
5012         if (!status)
5013                 status = decode_putfh(&xdr);
5014         if (!status)
5015                 status = decode_fsinfo(&xdr, res->fsinfo);
5016         return status;
5017 }
5018
5019 /*
5020  * PATHCONF request
5021  */
5022 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5023                                  struct nfs4_pathconf_res *res)
5024 {
5025         struct xdr_stream xdr;
5026         struct compound_hdr hdr;
5027         int status;
5028
5029         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5030         status = decode_compound_hdr(&xdr, &hdr);
5031         if (!status)
5032                 status = decode_sequence(&xdr, &res->seq_res, req);
5033         if (!status)
5034                 status = decode_putfh(&xdr);
5035         if (!status)
5036                 status = decode_pathconf(&xdr, res->pathconf);
5037         return status;
5038 }
5039
5040 /*
5041  * STATFS request
5042  */
5043 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5044                                struct nfs4_statfs_res *res)
5045 {
5046         struct xdr_stream xdr;
5047         struct compound_hdr hdr;
5048         int status;
5049
5050         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5051         status = decode_compound_hdr(&xdr, &hdr);
5052         if (!status)
5053                 status = decode_sequence(&xdr, &res->seq_res, req);
5054         if (!status)
5055                 status = decode_putfh(&xdr);
5056         if (!status)
5057                 status = decode_statfs(&xdr, res->fsstat);
5058         return status;
5059 }
5060
5061 /*
5062  * GETATTR_BITMAP request
5063  */
5064 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5065 {
5066         struct xdr_stream xdr;
5067         struct compound_hdr hdr;
5068         int status;
5069
5070         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5071         status = decode_compound_hdr(&xdr, &hdr);
5072         if (status)
5073                 goto out;
5074         status = decode_sequence(&xdr, &res->seq_res, req);
5075         if (status)
5076                 goto out;
5077         if ((status = decode_putfh(&xdr)) != 0)
5078                 goto out;
5079         status = decode_server_caps(&xdr, res);
5080 out:
5081         return status;
5082 }
5083
5084 /*
5085  * Decode RENEW response
5086  */
5087 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5088 {
5089         struct xdr_stream xdr;
5090         struct compound_hdr hdr;
5091         int status;
5092
5093         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5094         status = decode_compound_hdr(&xdr, &hdr);
5095         if (!status)
5096                 status = decode_renew(&xdr);
5097         return status;
5098 }
5099
5100 /*
5101  * a SETCLIENTID request
5102  */
5103 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5104                 struct nfs_client *clp)
5105 {
5106         struct xdr_stream xdr;
5107         struct compound_hdr hdr;
5108         int status;
5109
5110         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5111         status = decode_compound_hdr(&xdr, &hdr);
5112         if (!status)
5113                 status = decode_setclientid(&xdr, clp);
5114         return status;
5115 }
5116
5117 /*
5118  * a SETCLIENTID_CONFIRM request
5119  */
5120 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5121 {
5122         struct xdr_stream xdr;
5123         struct compound_hdr hdr;
5124         int status;
5125
5126         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5127         status = decode_compound_hdr(&xdr, &hdr);
5128         if (!status)
5129                 status = decode_setclientid_confirm(&xdr);
5130         if (!status)
5131                 status = decode_putrootfh(&xdr);
5132         if (!status)
5133                 status = decode_fsinfo(&xdr, fsinfo);
5134         return status;
5135 }
5136
5137 /*
5138  * DELEGRETURN request
5139  */
5140 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5141 {
5142         struct xdr_stream xdr;
5143         struct compound_hdr hdr;
5144         int status;
5145
5146         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5147         status = decode_compound_hdr(&xdr, &hdr);
5148         if (status)
5149                 goto out;
5150         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5151         if (status)
5152                 goto out;
5153         status = decode_putfh(&xdr);
5154         if (status != 0)
5155                 goto out;
5156         status = decode_delegreturn(&xdr);
5157         decode_getfattr(&xdr, res->fattr, res->server);
5158 out:
5159         return status;
5160 }
5161
5162 /*
5163  * FS_LOCATIONS request
5164  */
5165 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5166                                      struct nfs4_fs_locations_res *res)
5167 {
5168         struct xdr_stream xdr;
5169         struct compound_hdr hdr;
5170         int status;
5171
5172         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5173         status = decode_compound_hdr(&xdr, &hdr);
5174         if (status)
5175                 goto out;
5176         status = decode_sequence(&xdr, &res->seq_res, req);
5177         if (status)
5178                 goto out;
5179         if ((status = decode_putfh(&xdr)) != 0)
5180                 goto out;
5181         if ((status = decode_lookup(&xdr)) != 0)
5182                 goto out;
5183         xdr_enter_page(&xdr, PAGE_SIZE);
5184         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5185                                  res->fs_locations->server);
5186 out:
5187         return status;
5188 }
5189
5190 #if defined(CONFIG_NFS_V4_1)
5191 /*
5192  * EXCHANGE_ID request
5193  */
5194 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5195                                     void *res)
5196 {
5197         struct xdr_stream xdr;
5198         struct compound_hdr hdr;
5199         int status;
5200
5201         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5202         status = decode_compound_hdr(&xdr, &hdr);
5203         if (!status)
5204                 status = decode_exchange_id(&xdr, res);
5205         return status;
5206 }
5207
5208 /*
5209  * a CREATE_SESSION request
5210  */
5211 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5212                                        struct nfs41_create_session_res *res)
5213 {
5214         struct xdr_stream xdr;
5215         struct compound_hdr hdr;
5216         int status;
5217
5218         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5219         status = decode_compound_hdr(&xdr, &hdr);
5220         if (!status)
5221                 status = decode_create_session(&xdr, res);
5222         return status;
5223 }
5224
5225 /*
5226  * a DESTROY_SESSION request
5227  */
5228 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5229                                         void *dummy)
5230 {
5231         struct xdr_stream xdr;
5232         struct compound_hdr hdr;
5233         int status;
5234
5235         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5236         status = decode_compound_hdr(&xdr, &hdr);
5237         if (!status)
5238                 status = decode_destroy_session(&xdr, dummy);
5239         return status;
5240 }
5241
5242 /*
5243  * a SEQUENCE request
5244  */
5245 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5246                                  struct nfs4_sequence_res *res)
5247 {
5248         struct xdr_stream xdr;
5249         struct compound_hdr hdr;
5250         int status;
5251
5252         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5253         status = decode_compound_hdr(&xdr, &hdr);
5254         if (!status)
5255                 status = decode_sequence(&xdr, res, rqstp);
5256         return status;
5257 }
5258
5259 /*
5260  * a GET_LEASE_TIME request
5261  */
5262 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5263                                        struct nfs4_get_lease_time_res *res)
5264 {
5265         struct xdr_stream xdr;
5266         struct compound_hdr hdr;
5267         int status;
5268
5269         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5270         status = decode_compound_hdr(&xdr, &hdr);
5271         if (!status)
5272                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5273         if (!status)
5274                 status = decode_putrootfh(&xdr);
5275         if (!status)
5276                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5277         return status;
5278 }
5279 #endif /* CONFIG_NFS_V4_1 */
5280
5281 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5282 {
5283         uint32_t bitmap[2] = {0};
5284         uint32_t len;
5285
5286         if (!*p++) {
5287                 if (!*p)
5288                         return ERR_PTR(-EAGAIN);
5289                 entry->eof = 1;
5290                 return ERR_PTR(-EBADCOOKIE);
5291         }
5292
5293         entry->prev_cookie = entry->cookie;
5294         p = xdr_decode_hyper(p, &entry->cookie);
5295         entry->len = ntohl(*p++);
5296         entry->name = (const char *) p;
5297         p += XDR_QUADLEN(entry->len);
5298
5299         /*
5300          * In case the server doesn't return an inode number,
5301          * we fake one here.  (We don't use inode number 0,
5302          * since glibc seems to choke on it...)
5303          */
5304         entry->ino = 1;
5305
5306         len = ntohl(*p++);              /* bitmap length */
5307         if (len-- > 0) {
5308                 bitmap[0] = ntohl(*p++);
5309                 if (len-- > 0) {
5310                         bitmap[1] = ntohl(*p++);
5311                         p += len;
5312                 }
5313         }
5314         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5315         if (len > 0) {
5316                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5317                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5318                         /* Ignore the return value of rdattr_error for now */
5319                         p++;
5320                         len--;
5321                 }
5322                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5323                         xdr_decode_hyper(p, &entry->ino);
5324                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5325                         xdr_decode_hyper(p, &entry->ino);
5326                 p += len;
5327         }
5328
5329         entry->eof = !p[0] && p[1];
5330         return p;
5331 }
5332
5333 /*
5334  * We need to translate between nfs status return values and
5335  * the local errno values which may not be the same.
5336  */
5337 static struct {
5338         int stat;
5339         int errno;
5340 } nfs_errtbl[] = {
5341         { NFS4_OK,              0               },
5342         { NFS4ERR_PERM,         -EPERM          },
5343         { NFS4ERR_NOENT,        -ENOENT         },
5344         { NFS4ERR_IO,           -errno_NFSERR_IO},
5345         { NFS4ERR_NXIO,         -ENXIO          },
5346         { NFS4ERR_ACCESS,       -EACCES         },
5347         { NFS4ERR_EXIST,        -EEXIST         },
5348         { NFS4ERR_XDEV,         -EXDEV          },
5349         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5350         { NFS4ERR_ISDIR,        -EISDIR         },
5351         { NFS4ERR_INVAL,        -EINVAL         },
5352         { NFS4ERR_FBIG,         -EFBIG          },
5353         { NFS4ERR_NOSPC,        -ENOSPC         },
5354         { NFS4ERR_ROFS,         -EROFS          },
5355         { NFS4ERR_MLINK,        -EMLINK         },
5356         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5357         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5358         { NFS4ERR_DQUOT,        -EDQUOT         },
5359         { NFS4ERR_STALE,        -ESTALE         },
5360         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5361         { NFS4ERR_BADOWNER,     -EINVAL         },
5362         { NFS4ERR_BADNAME,      -EINVAL         },
5363         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5364         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5365         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5366         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5367         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5368         { NFS4ERR_LOCKED,       -EAGAIN         },
5369         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5370         { NFS4ERR_SYMLINK,      -ELOOP          },
5371         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5372         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5373         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5374                                                     * to be handled by a
5375                                                     * middle-layer.
5376                                                     */
5377         { -1,                   -EIO            }
5378 };
5379
5380 /*
5381  * Convert an NFS error code to a local one.
5382  * This one is used jointly by NFSv2 and NFSv3.
5383  */
5384 static int
5385 nfs4_stat_to_errno(int stat)
5386 {
5387         int i;
5388         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5389                 if (nfs_errtbl[i].stat == stat)
5390                         return nfs_errtbl[i].errno;
5391         }
5392         if (stat <= 10000 || stat > 10100) {
5393                 /* The server is looney tunes. */
5394                 return -ESERVERFAULT;
5395         }
5396         /* If we cannot translate the error, the recovery routines should
5397          * handle it.
5398          * Note: remaining NFSv4 error codes have values > 10000, so should
5399          * not conflict with native Linux error codes.
5400          */
5401         return -stat;
5402 }
5403
5404 #define PROC(proc, argtype, restype)                            \
5405 [NFSPROC4_CLNT_##proc] = {                                      \
5406         .p_proc   = NFSPROC4_COMPOUND,                          \
5407         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5408         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5409         .p_arglen = NFS4_##argtype##_sz,                        \
5410         .p_replen = NFS4_##restype##_sz,                        \
5411         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5412         .p_name   = #proc,                                      \
5413 }
5414
5415 struct rpc_procinfo     nfs4_procedures[] = {
5416   PROC(READ,            enc_read,       dec_read),
5417   PROC(WRITE,           enc_write,      dec_write),
5418   PROC(COMMIT,          enc_commit,     dec_commit),
5419   PROC(OPEN,            enc_open,       dec_open),
5420   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5421   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5422   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5423   PROC(CLOSE,           enc_close,      dec_close),
5424   PROC(SETATTR,         enc_setattr,    dec_setattr),
5425   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5426   PROC(RENEW,           enc_renew,      dec_renew),
5427   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5428   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5429   PROC(LOCK,            enc_lock,       dec_lock),
5430   PROC(LOCKT,           enc_lockt,      dec_lockt),
5431   PROC(LOCKU,           enc_locku,      dec_locku),
5432   PROC(ACCESS,          enc_access,     dec_access),
5433   PROC(GETATTR,         enc_getattr,    dec_getattr),
5434   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5435   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5436   PROC(REMOVE,          enc_remove,     dec_remove),
5437   PROC(RENAME,          enc_rename,     dec_rename),
5438   PROC(LINK,            enc_link,       dec_link),
5439   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5440   PROC(CREATE,          enc_create,     dec_create),
5441   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5442   PROC(STATFS,          enc_statfs,     dec_statfs),
5443   PROC(READLINK,        enc_readlink,   dec_readlink),
5444   PROC(READDIR,         enc_readdir,    dec_readdir),
5445   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5446   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5447   PROC(GETACL,          enc_getacl,     dec_getacl),
5448   PROC(SETACL,          enc_setacl,     dec_setacl),
5449   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5450 #if defined(CONFIG_NFS_V4_1)
5451   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5452   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5453   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5454   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5455   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5456 #endif /* CONFIG_NFS_V4_1 */
5457 };
5458
5459 struct rpc_version              nfs_version4 = {
5460         .number                 = 4,
5461         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5462         .procs                  = nfs4_procedures
5463 };
5464
5465 /*
5466  * Local variables:
5467  *  c-basic-offset: 8
5468  * End:
5469  */