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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 READTIME(x)       do {                  \
2437         p++;                                    \
2438         (x.tv_sec) = ntohl(*p++);               \
2439         (x.tv_nsec) = ntohl(*p++);              \
2440 } while (0)
2441 #define COPYMEM(x,nbytes) do {                  \
2442         memcpy((x), p, nbytes);                 \
2443         p += XDR_QUADLEN(nbytes);               \
2444 } while (0)
2445
2446 #define READ_BUF(nbytes)  do { \
2447         p = xdr_inline_decode(xdr, nbytes); \
2448         if (unlikely(!p)) { \
2449                 dprintk("nfs: %s: prematurely hit end of receive" \
2450                                 " buffer\n", __func__); \
2451                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2452                                 __func__, xdr->p, nbytes, xdr->end); \
2453                 return -EIO; \
2454         } \
2455 } while (0)
2456
2457 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2458 {
2459         __be32 *p;
2460
2461         READ_BUF(4);
2462         *len = be32_to_cpup(p++);
2463         READ_BUF(*len);
2464         *string = (char *)p;
2465         return 0;
2466 }
2467
2468 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2469 {
2470         __be32 *p;
2471
2472         READ_BUF(8);
2473         hdr->status = be32_to_cpup(p++);
2474         hdr->taglen = be32_to_cpup(p++);
2475
2476         READ_BUF(hdr->taglen + 4);
2477         hdr->tag = (char *)p;
2478         p += XDR_QUADLEN(hdr->taglen);
2479         hdr->nops = be32_to_cpup(p++);
2480         if (unlikely(hdr->nops < 1))
2481                 return nfs4_stat_to_errno(hdr->status);
2482         return 0;
2483 }
2484
2485 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2486 {
2487         __be32 *p;
2488         uint32_t opnum;
2489         int32_t nfserr;
2490
2491         READ_BUF(8);
2492         opnum = be32_to_cpup(p++);
2493         if (opnum != expected) {
2494                 dprintk("nfs: Server returned operation"
2495                         " %d but we issued a request for %d\n",
2496                                 opnum, expected);
2497                 return -EIO;
2498         }
2499         nfserr = be32_to_cpup(p++);
2500         if (nfserr != NFS_OK)
2501                 return nfs4_stat_to_errno(nfserr);
2502         return 0;
2503 }
2504
2505 /* Dummy routine */
2506 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2507 {
2508         __be32 *p;
2509         unsigned int strlen;
2510         char *str;
2511
2512         READ_BUF(12);
2513         return decode_opaque_inline(xdr, &strlen, &str);
2514 }
2515
2516 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2517 {
2518         uint32_t bmlen;
2519         __be32 *p;
2520
2521         READ_BUF(4);
2522         bmlen = be32_to_cpup(p++);
2523
2524         bitmap[0] = bitmap[1] = 0;
2525         READ_BUF((bmlen << 2));
2526         if (bmlen > 0) {
2527                 bitmap[0] = be32_to_cpup(p++);
2528                 if (bmlen > 1)
2529                         bitmap[1] = be32_to_cpup(p++);
2530         }
2531         return 0;
2532 }
2533
2534 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2535 {
2536         __be32 *p;
2537
2538         READ_BUF(4);
2539         *attrlen = be32_to_cpup(p++);
2540         *savep = xdr->p;
2541         return 0;
2542 }
2543
2544 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2545 {
2546         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2547                 decode_attr_bitmap(xdr, bitmask);
2548                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2549         } else
2550                 bitmask[0] = bitmask[1] = 0;
2551         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2552         return 0;
2553 }
2554
2555 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2556 {
2557         __be32 *p;
2558         int ret = 0;
2559
2560         *type = 0;
2561         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2562                 return -EIO;
2563         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2564                 READ_BUF(4);
2565                 *type = be32_to_cpup(p++);
2566                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2567                         dprintk("%s: bad type %d\n", __func__, *type);
2568                         return -EIO;
2569                 }
2570                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2571                 ret = NFS_ATTR_FATTR_TYPE;
2572         }
2573         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2574         return ret;
2575 }
2576
2577 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2578 {
2579         __be32 *p;
2580         int ret = 0;
2581
2582         *change = 0;
2583         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2584                 return -EIO;
2585         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2586                 READ_BUF(8);
2587                 p = xdr_decode_hyper(p, change);
2588                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2589                 ret = NFS_ATTR_FATTR_CHANGE;
2590         }
2591         dprintk("%s: change attribute=%Lu\n", __func__,
2592                         (unsigned long long)*change);
2593         return ret;
2594 }
2595
2596 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2597 {
2598         __be32 *p;
2599         int ret = 0;
2600
2601         *size = 0;
2602         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2603                 return -EIO;
2604         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2605                 READ_BUF(8);
2606                 p = xdr_decode_hyper(p, size);
2607                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2608                 ret = NFS_ATTR_FATTR_SIZE;
2609         }
2610         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2611         return ret;
2612 }
2613
2614 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2615 {
2616         __be32 *p;
2617
2618         *res = 0;
2619         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2620                 return -EIO;
2621         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2622                 READ_BUF(4);
2623                 *res = be32_to_cpup(p++);
2624                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2625         }
2626         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2627         return 0;
2628 }
2629
2630 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2631 {
2632         __be32 *p;
2633
2634         *res = 0;
2635         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2636                 return -EIO;
2637         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2638                 READ_BUF(4);
2639                 *res = be32_to_cpup(p++);
2640                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2641         }
2642         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2643         return 0;
2644 }
2645
2646 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2647 {
2648         __be32 *p;
2649         int ret = 0;
2650
2651         fsid->major = 0;
2652         fsid->minor = 0;
2653         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2654                 return -EIO;
2655         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2656                 READ_BUF(16);
2657                 p = xdr_decode_hyper(p, &fsid->major);
2658                 p = xdr_decode_hyper(p, &fsid->minor);
2659                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2660                 ret = NFS_ATTR_FATTR_FSID;
2661         }
2662         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2663                         (unsigned long long)fsid->major,
2664                         (unsigned long long)fsid->minor);
2665         return ret;
2666 }
2667
2668 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2669 {
2670         __be32 *p;
2671
2672         *res = 60;
2673         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2674                 return -EIO;
2675         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2676                 READ_BUF(4);
2677                 *res = be32_to_cpup(p++);
2678                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2679         }
2680         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2681         return 0;
2682 }
2683
2684 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2685 {
2686         __be32 *p;
2687
2688         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2689         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2690                 return -EIO;
2691         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2692                 READ_BUF(4);
2693                 *res = be32_to_cpup(p++);
2694                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2695         }
2696         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2697         return 0;
2698 }
2699
2700 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2701 {
2702         __be32 *p;
2703         int ret = 0;
2704
2705         *fileid = 0;
2706         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2707                 return -EIO;
2708         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2709                 READ_BUF(8);
2710                 p = xdr_decode_hyper(p, fileid);
2711                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2712                 ret = NFS_ATTR_FATTR_FILEID;
2713         }
2714         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2715         return ret;
2716 }
2717
2718 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2719 {
2720         __be32 *p;
2721         int ret = 0;
2722
2723         *fileid = 0;
2724         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2725                 return -EIO;
2726         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2727                 READ_BUF(8);
2728                 p = xdr_decode_hyper(p, fileid);
2729                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2730                 ret = NFS_ATTR_FATTR_FILEID;
2731         }
2732         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2733         return ret;
2734 }
2735
2736 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2737 {
2738         __be32 *p;
2739         int status = 0;
2740
2741         *res = 0;
2742         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2743                 return -EIO;
2744         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2745                 READ_BUF(8);
2746                 p = xdr_decode_hyper(p, res);
2747                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2748         }
2749         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2750         return status;
2751 }
2752
2753 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2754 {
2755         __be32 *p;
2756         int status = 0;
2757
2758         *res = 0;
2759         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2760                 return -EIO;
2761         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2762                 READ_BUF(8);
2763                 p = xdr_decode_hyper(p, res);
2764                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2765         }
2766         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2767         return status;
2768 }
2769
2770 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2771 {
2772         __be32 *p;
2773         int status = 0;
2774
2775         *res = 0;
2776         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2777                 return -EIO;
2778         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2779                 READ_BUF(8);
2780                 p = xdr_decode_hyper(p, res);
2781                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2782         }
2783         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2784         return status;
2785 }
2786
2787 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2788 {
2789         u32 n;
2790         __be32 *p;
2791         int status = 0;
2792
2793         READ_BUF(4);
2794         n = be32_to_cpup(p++);
2795         if (n == 0)
2796                 goto root_path;
2797         dprintk("path ");
2798         path->ncomponents = 0;
2799         while (path->ncomponents < n) {
2800                 struct nfs4_string *component = &path->components[path->ncomponents];
2801                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2802                 if (unlikely(status != 0))
2803                         goto out_eio;
2804                 if (path->ncomponents != n)
2805                         dprintk("/");
2806                 dprintk("%s", component->data);
2807                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2808                         path->ncomponents++;
2809                 else {
2810                         dprintk("cannot parse %d components in path\n", n);
2811                         goto out_eio;
2812                 }
2813         }
2814 out:
2815         dprintk("\n");
2816         return status;
2817 root_path:
2818 /* a root pathname is sent as a zero component4 */
2819         path->ncomponents = 1;
2820         path->components[0].len=0;
2821         path->components[0].data=NULL;
2822         dprintk("path /\n");
2823         goto out;
2824 out_eio:
2825         dprintk(" status %d", status);
2826         status = -EIO;
2827         goto out;
2828 }
2829
2830 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2831 {
2832         int n;
2833         __be32 *p;
2834         int status = -EIO;
2835
2836         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2837                 goto out;
2838         status = 0;
2839         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2840                 goto out;
2841         dprintk("%s: fsroot ", __func__);
2842         status = decode_pathname(xdr, &res->fs_path);
2843         if (unlikely(status != 0))
2844                 goto out;
2845         READ_BUF(4);
2846         n = be32_to_cpup(p++);
2847         if (n <= 0)
2848                 goto out_eio;
2849         res->nlocations = 0;
2850         while (res->nlocations < n) {
2851                 u32 m;
2852                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2853
2854                 READ_BUF(4);
2855                 m = be32_to_cpup(p++);
2856
2857                 loc->nservers = 0;
2858                 dprintk("%s: servers ", __func__);
2859                 while (loc->nservers < m) {
2860                         struct nfs4_string *server = &loc->servers[loc->nservers];
2861                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2862                         if (unlikely(status != 0))
2863                                 goto out_eio;
2864                         dprintk("%s ", server->data);
2865                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2866                                 loc->nservers++;
2867                         else {
2868                                 unsigned int i;
2869                                 dprintk("%s: using first %u of %u servers "
2870                                         "returned for location %u\n",
2871                                                 __func__,
2872                                                 NFS4_FS_LOCATION_MAXSERVERS,
2873                                                 m, res->nlocations);
2874                                 for (i = loc->nservers; i < m; i++) {
2875                                         unsigned int len;
2876                                         char *data;
2877                                         status = decode_opaque_inline(xdr, &len, &data);
2878                                         if (unlikely(status != 0))
2879                                                 goto out_eio;
2880                                 }
2881                         }
2882                 }
2883                 status = decode_pathname(xdr, &loc->rootpath);
2884                 if (unlikely(status != 0))
2885                         goto out_eio;
2886                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2887                         res->nlocations++;
2888         }
2889         if (res->nlocations != 0)
2890                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2891 out:
2892         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2893         return status;
2894 out_eio:
2895         status = -EIO;
2896         goto out;
2897 }
2898
2899 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2900 {
2901         __be32 *p;
2902         int status = 0;
2903
2904         *res = 0;
2905         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2906                 return -EIO;
2907         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2908                 READ_BUF(8);
2909                 p = xdr_decode_hyper(p, res);
2910                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2911         }
2912         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2913         return status;
2914 }
2915
2916 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2917 {
2918         __be32 *p;
2919         int status = 0;
2920
2921         *maxlink = 1;
2922         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2923                 return -EIO;
2924         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2925                 READ_BUF(4);
2926                 *maxlink = be32_to_cpup(p++);
2927                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2928         }
2929         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2930         return status;
2931 }
2932
2933 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2934 {
2935         __be32 *p;
2936         int status = 0;
2937
2938         *maxname = 1024;
2939         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2940                 return -EIO;
2941         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2942                 READ_BUF(4);
2943                 *maxname = be32_to_cpup(p++);
2944                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2945         }
2946         dprintk("%s: maxname=%u\n", __func__, *maxname);
2947         return status;
2948 }
2949
2950 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2951 {
2952         __be32 *p;
2953         int status = 0;
2954
2955         *res = 1024;
2956         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2957                 return -EIO;
2958         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2959                 uint64_t maxread;
2960                 READ_BUF(8);
2961                 p = xdr_decode_hyper(p, &maxread);
2962                 if (maxread > 0x7FFFFFFF)
2963                         maxread = 0x7FFFFFFF;
2964                 *res = (uint32_t)maxread;
2965                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2966         }
2967         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2968         return status;
2969 }
2970
2971 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2972 {
2973         __be32 *p;
2974         int status = 0;
2975
2976         *res = 1024;
2977         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2978                 return -EIO;
2979         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2980                 uint64_t maxwrite;
2981                 READ_BUF(8);
2982                 p = xdr_decode_hyper(p, &maxwrite);
2983                 if (maxwrite > 0x7FFFFFFF)
2984                         maxwrite = 0x7FFFFFFF;
2985                 *res = (uint32_t)maxwrite;
2986                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2987         }
2988         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2989         return status;
2990 }
2991
2992 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2993 {
2994         uint32_t tmp;
2995         __be32 *p;
2996         int ret = 0;
2997
2998         *mode = 0;
2999         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3000                 return -EIO;
3001         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3002                 READ_BUF(4);
3003                 tmp = be32_to_cpup(p++);
3004                 *mode = tmp & ~S_IFMT;
3005                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3006                 ret = NFS_ATTR_FATTR_MODE;
3007         }
3008         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3009         return ret;
3010 }
3011
3012 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3013 {
3014         __be32 *p;
3015         int ret = 0;
3016
3017         *nlink = 1;
3018         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3019                 return -EIO;
3020         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3021                 READ_BUF(4);
3022                 *nlink = be32_to_cpup(p++);
3023                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3024                 ret = NFS_ATTR_FATTR_NLINK;
3025         }
3026         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3027         return ret;
3028 }
3029
3030 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
3031 {
3032         uint32_t len;
3033         __be32 *p;
3034         int ret = 0;
3035
3036         *uid = -2;
3037         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3038                 return -EIO;
3039         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3040                 READ_BUF(4);
3041                 len = be32_to_cpup(p++);
3042                 READ_BUF(len);
3043                 if (len < XDR_MAX_NETOBJ) {
3044                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3045                                 ret = NFS_ATTR_FATTR_OWNER;
3046                         else
3047                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3048                                                 __func__);
3049                 } else
3050                         dprintk("%s: name too long (%u)!\n",
3051                                         __func__, len);
3052                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3053         }
3054         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3055         return ret;
3056 }
3057
3058 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
3059 {
3060         uint32_t len;
3061         __be32 *p;
3062         int ret = 0;
3063
3064         *gid = -2;
3065         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3066                 return -EIO;
3067         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3068                 READ_BUF(4);
3069                 len = be32_to_cpup(p++);
3070                 READ_BUF(len);
3071                 if (len < XDR_MAX_NETOBJ) {
3072                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3073                                 ret = NFS_ATTR_FATTR_GROUP;
3074                         else
3075                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3076                                                 __func__);
3077                 } else
3078                         dprintk("%s: name too long (%u)!\n",
3079                                         __func__, len);
3080                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3081         }
3082         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3083         return ret;
3084 }
3085
3086 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3087 {
3088         uint32_t major = 0, minor = 0;
3089         __be32 *p;
3090         int ret = 0;
3091
3092         *rdev = MKDEV(0,0);
3093         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3094                 return -EIO;
3095         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3096                 dev_t tmp;
3097
3098                 READ_BUF(8);
3099                 major = be32_to_cpup(p++);
3100                 minor = be32_to_cpup(p++);
3101                 tmp = MKDEV(major, minor);
3102                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3103                         *rdev = tmp;
3104                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3105                 ret = NFS_ATTR_FATTR_RDEV;
3106         }
3107         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3108         return ret;
3109 }
3110
3111 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3112 {
3113         __be32 *p;
3114         int status = 0;
3115
3116         *res = 0;
3117         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3118                 return -EIO;
3119         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3120                 READ_BUF(8);
3121                 p = xdr_decode_hyper(p, res);
3122                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3123         }
3124         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3125         return status;
3126 }
3127
3128 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3129 {
3130         __be32 *p;
3131         int status = 0;
3132
3133         *res = 0;
3134         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3135                 return -EIO;
3136         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3137                 READ_BUF(8);
3138                 p = xdr_decode_hyper(p, res);
3139                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3140         }
3141         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3142         return status;
3143 }
3144
3145 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3146 {
3147         __be32 *p;
3148         int status = 0;
3149
3150         *res = 0;
3151         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3152                 return -EIO;
3153         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3154                 READ_BUF(8);
3155                 p = xdr_decode_hyper(p, res);
3156                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3157         }
3158         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3159         return status;
3160 }
3161
3162 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3163 {
3164         __be32 *p;
3165         int ret = 0;
3166
3167         *used = 0;
3168         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3169                 return -EIO;
3170         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3171                 READ_BUF(8);
3172                 p = xdr_decode_hyper(p, used);
3173                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3174                 ret = NFS_ATTR_FATTR_SPACE_USED;
3175         }
3176         dprintk("%s: space used=%Lu\n", __func__,
3177                         (unsigned long long)*used);
3178         return ret;
3179 }
3180
3181 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3182 {
3183         __be32 *p;
3184         uint64_t sec;
3185         uint32_t nsec;
3186
3187         READ_BUF(12);
3188         p = xdr_decode_hyper(p, &sec);
3189         nsec = be32_to_cpup(p++);
3190         time->tv_sec = (time_t)sec;
3191         time->tv_nsec = (long)nsec;
3192         return 0;
3193 }
3194
3195 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3196 {
3197         int status = 0;
3198
3199         time->tv_sec = 0;
3200         time->tv_nsec = 0;
3201         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3202                 return -EIO;
3203         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3204                 status = decode_attr_time(xdr, time);
3205                 if (status == 0)
3206                         status = NFS_ATTR_FATTR_ATIME;
3207                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3208         }
3209         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3210         return status;
3211 }
3212
3213 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3214 {
3215         int status = 0;
3216
3217         time->tv_sec = 0;
3218         time->tv_nsec = 0;
3219         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3220                 return -EIO;
3221         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3222                 status = decode_attr_time(xdr, time);
3223                 if (status == 0)
3224                         status = NFS_ATTR_FATTR_CTIME;
3225                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3226         }
3227         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3228         return status;
3229 }
3230
3231 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3232 {
3233         int status = 0;
3234
3235         time->tv_sec = 0;
3236         time->tv_nsec = 0;
3237         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3238                 return -EIO;
3239         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3240                 status = decode_attr_time(xdr, time);
3241                 if (status == 0)
3242                         status = NFS_ATTR_FATTR_MTIME;
3243                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3244         }
3245         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3246         return status;
3247 }
3248
3249 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3250 {
3251         unsigned int attrwords = XDR_QUADLEN(attrlen);
3252         unsigned int nwords = xdr->p - savep;
3253
3254         if (unlikely(attrwords != nwords)) {
3255                 dprintk("%s: server returned incorrect attribute length: "
3256                         "%u %c %u\n",
3257                                 __func__,
3258                                 attrwords << 2,
3259                                 (attrwords < nwords) ? '<' : '>',
3260                                 nwords << 2);
3261                 return -EIO;
3262         }
3263         return 0;
3264 }
3265
3266 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3267 {
3268         __be32 *p;
3269
3270         READ_BUF(20);
3271         cinfo->atomic = be32_to_cpup(p++);
3272         p = xdr_decode_hyper(p, &cinfo->before);
3273         p = xdr_decode_hyper(p, &cinfo->after);
3274         return 0;
3275 }
3276
3277 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3278 {
3279         __be32 *p;
3280         uint32_t supp, acc;
3281         int status;
3282
3283         status = decode_op_hdr(xdr, OP_ACCESS);
3284         if (status)
3285                 return status;
3286         READ_BUF(8);
3287         supp = be32_to_cpup(p++);
3288         acc = be32_to_cpup(p++);
3289         access->supported = supp;
3290         access->access = acc;
3291         return 0;
3292 }
3293
3294 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3295 {
3296         __be32 *p;
3297         int status;
3298
3299         status = decode_op_hdr(xdr, OP_CLOSE);
3300         if (status != -EIO)
3301                 nfs_increment_open_seqid(status, res->seqid);
3302         if (status)
3303                 return status;
3304         READ_BUF(NFS4_STATEID_SIZE);
3305         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3306         return 0;
3307 }
3308
3309 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3310 {
3311         __be32 *p;
3312         int status;
3313
3314         status = decode_op_hdr(xdr, OP_COMMIT);
3315         if (status)
3316                 return status;
3317         READ_BUF(8);
3318         COPYMEM(res->verf->verifier, 8);
3319         return 0;
3320 }
3321
3322 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3323 {
3324         __be32 *p;
3325         uint32_t bmlen;
3326         int status;
3327
3328         status = decode_op_hdr(xdr, OP_CREATE);
3329         if (status)
3330                 return status;
3331         if ((status = decode_change_info(xdr, cinfo)))
3332                 return status;
3333         READ_BUF(4);
3334         bmlen = be32_to_cpup(p++);
3335         READ_BUF(bmlen << 2);
3336         return 0;
3337 }
3338
3339 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3340 {
3341         __be32 *savep;
3342         uint32_t attrlen, bitmap[2] = {0};
3343         int status;
3344
3345         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3346                 goto xdr_error;
3347         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3348                 goto xdr_error;
3349         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3350                 goto xdr_error;
3351         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3352                 goto xdr_error;
3353         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3354                 goto xdr_error;
3355         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3356                 goto xdr_error;
3357         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3358                 goto xdr_error;
3359         status = verify_attr_len(xdr, savep, attrlen);
3360 xdr_error:
3361         dprintk("%s: xdr returned %d!\n", __func__, -status);
3362         return status;
3363 }
3364
3365 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3366 {
3367         __be32 *savep;
3368         uint32_t attrlen, bitmap[2] = {0};
3369         int status;
3370
3371         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3372                 goto xdr_error;
3373         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3374                 goto xdr_error;
3375         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3376                 goto xdr_error;
3377
3378         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3379                 goto xdr_error;
3380         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3381                 goto xdr_error;
3382         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3383                 goto xdr_error;
3384         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3385                 goto xdr_error;
3386         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3387                 goto xdr_error;
3388         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3389                 goto xdr_error;
3390
3391         status = verify_attr_len(xdr, savep, attrlen);
3392 xdr_error:
3393         dprintk("%s: xdr returned %d!\n", __func__, -status);
3394         return status;
3395 }
3396
3397 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3398 {
3399         __be32 *savep;
3400         uint32_t attrlen, bitmap[2] = {0};
3401         int status;
3402
3403         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3404                 goto xdr_error;
3405         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3406                 goto xdr_error;
3407         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3408                 goto xdr_error;
3409
3410         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3411                 goto xdr_error;
3412         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3413                 goto xdr_error;
3414
3415         status = verify_attr_len(xdr, savep, attrlen);
3416 xdr_error:
3417         dprintk("%s: xdr returned %d!\n", __func__, -status);
3418         return status;
3419 }
3420
3421 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3422 {
3423         __be32 *savep;
3424         uint32_t attrlen,
3425                  bitmap[2] = {0},
3426                  type;
3427         int status;
3428         umode_t fmode = 0;
3429         uint64_t fileid;
3430
3431         status = decode_op_hdr(xdr, OP_GETATTR);
3432         if (status < 0)
3433                 goto xdr_error;
3434
3435         status = decode_attr_bitmap(xdr, bitmap);
3436         if (status < 0)
3437                 goto xdr_error;
3438
3439         status = decode_attr_length(xdr, &attrlen, &savep);
3440         if (status < 0)
3441                 goto xdr_error;
3442
3443
3444         status = decode_attr_type(xdr, bitmap, &type);
3445         if (status < 0)
3446                 goto xdr_error;
3447         fattr->mode = 0;
3448         if (status != 0) {
3449                 fattr->mode |= nfs_type2fmt[type];
3450                 fattr->valid |= status;
3451         }
3452
3453         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3454         if (status < 0)
3455                 goto xdr_error;
3456         fattr->valid |= status;
3457
3458         status = decode_attr_size(xdr, bitmap, &fattr->size);
3459         if (status < 0)
3460                 goto xdr_error;
3461         fattr->valid |= status;
3462
3463         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3464         if (status < 0)
3465                 goto xdr_error;
3466         fattr->valid |= status;
3467
3468         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3469         if (status < 0)
3470                 goto xdr_error;
3471         fattr->valid |= status;
3472
3473         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3474                                                 struct nfs4_fs_locations,
3475                                                 fattr));
3476         if (status < 0)
3477                 goto xdr_error;
3478         fattr->valid |= status;
3479
3480         status = decode_attr_mode(xdr, bitmap, &fmode);
3481         if (status < 0)
3482                 goto xdr_error;
3483         if (status != 0) {
3484                 fattr->mode |= fmode;
3485                 fattr->valid |= status;
3486         }
3487
3488         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3489         if (status < 0)
3490                 goto xdr_error;
3491         fattr->valid |= status;
3492
3493         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3494         if (status < 0)
3495                 goto xdr_error;
3496         fattr->valid |= status;
3497
3498         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3499         if (status < 0)
3500                 goto xdr_error;
3501         fattr->valid |= status;
3502
3503         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3504         if (status < 0)
3505                 goto xdr_error;
3506         fattr->valid |= status;
3507
3508         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3509         if (status < 0)
3510                 goto xdr_error;
3511         fattr->valid |= status;
3512
3513         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3514         if (status < 0)
3515                 goto xdr_error;
3516         fattr->valid |= status;
3517
3518         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3519         if (status < 0)
3520                 goto xdr_error;
3521         fattr->valid |= status;
3522
3523         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3524         if (status < 0)
3525                 goto xdr_error;
3526         fattr->valid |= status;
3527
3528         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3529         if (status < 0)
3530                 goto xdr_error;
3531         if (status != 0 && !(fattr->valid & status)) {
3532                 fattr->fileid = fileid;
3533                 fattr->valid |= status;
3534         }
3535
3536         status = verify_attr_len(xdr, savep, attrlen);
3537 xdr_error:
3538         dprintk("%s: xdr returned %d\n", __func__, -status);
3539         return status;
3540 }
3541
3542
3543 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3544 {
3545         __be32 *savep;
3546         uint32_t attrlen, bitmap[2];
3547         int status;
3548
3549         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3550                 goto xdr_error;
3551         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3552                 goto xdr_error;
3553         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3554                 goto xdr_error;
3555
3556         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3557
3558         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3559                 goto xdr_error;
3560         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3561                 goto xdr_error;
3562         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3563                 goto xdr_error;
3564         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3565         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3566                 goto xdr_error;
3567         fsinfo->wtpref = fsinfo->wtmax;
3568
3569         status = verify_attr_len(xdr, savep, attrlen);
3570 xdr_error:
3571         dprintk("%s: xdr returned %d!\n", __func__, -status);
3572         return status;
3573 }
3574
3575 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3576 {
3577         __be32 *p;
3578         uint32_t len;
3579         int status;
3580
3581         /* Zero handle first to allow comparisons */
3582         memset(fh, 0, sizeof(*fh));
3583
3584         status = decode_op_hdr(xdr, OP_GETFH);
3585         if (status)
3586                 return status;
3587
3588         READ_BUF(4);
3589         len = be32_to_cpup(p++);
3590         if (len > NFS4_FHSIZE)
3591                 return -EIO;
3592         fh->size = len;
3593         READ_BUF(len);
3594         COPYMEM(fh->data, len);
3595         return 0;
3596 }
3597
3598 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3599 {
3600         int status;
3601
3602         status = decode_op_hdr(xdr, OP_LINK);
3603         if (status)
3604                 return status;
3605         return decode_change_info(xdr, cinfo);
3606 }
3607
3608 /*
3609  * We create the owner, so we know a proper owner.id length is 4.
3610  */
3611 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3612 {
3613         uint64_t offset, length, clientid;
3614         __be32 *p;
3615         uint32_t namelen, type;
3616
3617         READ_BUF(32);
3618         p = xdr_decode_hyper(p, &offset);
3619         p = xdr_decode_hyper(p, &length);
3620         type = be32_to_cpup(p++);
3621         if (fl != NULL) {
3622                 fl->fl_start = (loff_t)offset;
3623                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3624                 if (length == ~(uint64_t)0)
3625                         fl->fl_end = OFFSET_MAX;
3626                 fl->fl_type = F_WRLCK;
3627                 if (type & 1)
3628                         fl->fl_type = F_RDLCK;
3629                 fl->fl_pid = 0;
3630         }
3631         p = xdr_decode_hyper(p, &clientid);
3632         namelen = be32_to_cpup(p++);
3633         READ_BUF(namelen);
3634         return -NFS4ERR_DENIED;
3635 }
3636
3637 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3638 {
3639         __be32 *p;
3640         int status;
3641
3642         status = decode_op_hdr(xdr, OP_LOCK);
3643         if (status == -EIO)
3644                 goto out;
3645         if (status == 0) {
3646                 READ_BUF(NFS4_STATEID_SIZE);
3647                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3648         } else if (status == -NFS4ERR_DENIED)
3649                 status = decode_lock_denied(xdr, NULL);
3650         if (res->open_seqid != NULL)
3651                 nfs_increment_open_seqid(status, res->open_seqid);
3652         nfs_increment_lock_seqid(status, res->lock_seqid);
3653 out:
3654         return status;
3655 }
3656
3657 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3658 {
3659         int status;
3660         status = decode_op_hdr(xdr, OP_LOCKT);
3661         if (status == -NFS4ERR_DENIED)
3662                 return decode_lock_denied(xdr, res->denied);
3663         return status;
3664 }
3665
3666 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3667 {
3668         __be32 *p;
3669         int status;
3670
3671         status = decode_op_hdr(xdr, OP_LOCKU);
3672         if (status != -EIO)
3673                 nfs_increment_lock_seqid(status, res->seqid);
3674         if (status == 0) {
3675                 READ_BUF(NFS4_STATEID_SIZE);
3676                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3677         }
3678         return status;
3679 }
3680
3681 static int decode_lookup(struct xdr_stream *xdr)
3682 {
3683         return decode_op_hdr(xdr, OP_LOOKUP);
3684 }
3685
3686 /* This is too sick! */
3687 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3688 {
3689         __be32 *p;
3690         uint32_t limit_type, nblocks, blocksize;
3691
3692         READ_BUF(12);
3693         limit_type = be32_to_cpup(p++);
3694         switch (limit_type) {
3695         case 1:
3696                 p = xdr_decode_hyper(p, maxsize);
3697                 break;
3698         case 2:
3699                 nblocks = be32_to_cpup(p++);
3700                 blocksize = be32_to_cpup(p++);
3701                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3702         }
3703         return 0;
3704 }
3705
3706 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3707 {
3708         __be32 *p;
3709         uint32_t delegation_type;
3710
3711         READ_BUF(4);
3712         delegation_type = be32_to_cpup(p++);
3713         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3714                 res->delegation_type = 0;
3715                 return 0;
3716         }
3717         READ_BUF(NFS4_STATEID_SIZE+4);
3718         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3719         res->do_recall = be32_to_cpup(p++);
3720
3721         switch (delegation_type) {
3722         case NFS4_OPEN_DELEGATE_READ:
3723                 res->delegation_type = FMODE_READ;
3724                 break;
3725         case NFS4_OPEN_DELEGATE_WRITE:
3726                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3727                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3728                                 return -EIO;
3729         }
3730         return decode_ace(xdr, NULL, res->server->nfs_client);
3731 }
3732
3733 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3734 {
3735         __be32 *p;
3736         uint32_t savewords, bmlen, i;
3737         int status;
3738
3739         status = decode_op_hdr(xdr, OP_OPEN);
3740         if (status != -EIO)
3741                 nfs_increment_open_seqid(status, res->seqid);
3742         if (status)
3743                 return status;
3744         READ_BUF(NFS4_STATEID_SIZE);
3745         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3746
3747         decode_change_info(xdr, &res->cinfo);
3748
3749         READ_BUF(8);
3750         res->rflags = be32_to_cpup(p++);
3751         bmlen = be32_to_cpup(p++);
3752         if (bmlen > 10)
3753                 goto xdr_error;
3754
3755         READ_BUF(bmlen << 2);
3756         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3757         for (i = 0; i < savewords; ++i)
3758                 res->attrset[i] = be32_to_cpup(p++);
3759         for (; i < NFS4_BITMAP_SIZE; i++)
3760                 res->attrset[i] = 0;
3761
3762         return decode_delegation(xdr, res);
3763 xdr_error:
3764         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3765         return -EIO;
3766 }
3767
3768 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3769 {
3770         __be32 *p;
3771         int status;
3772
3773         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3774         if (status != -EIO)
3775                 nfs_increment_open_seqid(status, res->seqid);
3776         if (status)
3777                 return status;
3778         READ_BUF(NFS4_STATEID_SIZE);
3779         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3780         return 0;
3781 }
3782
3783 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3784 {
3785         __be32 *p;
3786         int status;
3787
3788         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3789         if (status != -EIO)
3790                 nfs_increment_open_seqid(status, res->seqid);
3791         if (status)
3792                 return status;
3793         READ_BUF(NFS4_STATEID_SIZE);
3794         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3795         return 0;
3796 }
3797
3798 static int decode_putfh(struct xdr_stream *xdr)
3799 {
3800         return decode_op_hdr(xdr, OP_PUTFH);
3801 }
3802
3803 static int decode_putrootfh(struct xdr_stream *xdr)
3804 {
3805         return decode_op_hdr(xdr, OP_PUTROOTFH);
3806 }
3807
3808 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3809 {
3810         struct kvec *iov = req->rq_rcv_buf.head;
3811         __be32 *p;
3812         uint32_t count, eof, recvd, hdrlen;
3813         int status;
3814
3815         status = decode_op_hdr(xdr, OP_READ);
3816         if (status)
3817                 return status;
3818         READ_BUF(8);
3819         eof = be32_to_cpup(p++);
3820         count = be32_to_cpup(p++);
3821         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3822         recvd = req->rq_rcv_buf.len - hdrlen;
3823         if (count > recvd) {
3824                 dprintk("NFS: server cheating in read reply: "
3825                                 "count %u > recvd %u\n", count, recvd);
3826                 count = recvd;
3827                 eof = 0;
3828         }
3829         xdr_read_pages(xdr, count);
3830         res->eof = eof;
3831         res->count = count;
3832         return 0;
3833 }
3834
3835 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3836 {
3837         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3838         struct page     *page = *rcvbuf->pages;
3839         struct kvec     *iov = rcvbuf->head;
3840         size_t          hdrlen;
3841         u32             recvd, pglen = rcvbuf->page_len;
3842         __be32          *end, *entry, *p, *kaddr;
3843         unsigned int    nr = 0;
3844         int             status;
3845
3846         status = decode_op_hdr(xdr, OP_READDIR);
3847         if (status)
3848                 return status;
3849         READ_BUF(8);
3850         COPYMEM(readdir->verifier.data, 8);
3851         dprintk("%s: verifier = %08x:%08x\n",
3852                         __func__,
3853                         ((u32 *)readdir->verifier.data)[0],
3854                         ((u32 *)readdir->verifier.data)[1]);
3855
3856
3857         hdrlen = (char *) p - (char *) iov->iov_base;
3858         recvd = rcvbuf->len - hdrlen;
3859         if (pglen > recvd)
3860                 pglen = recvd;
3861         xdr_read_pages(xdr, pglen);
3862
3863         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3864         kaddr = p = kmap_atomic(page, KM_USER0);
3865         end = p + ((pglen + readdir->pgbase) >> 2);
3866         entry = p;
3867
3868         /* Make sure the packet actually has a value_follows and EOF entry */
3869         if ((entry + 1) > end)
3870                 goto short_pkt;
3871
3872         for (; *p++; nr++) {
3873                 u32 len, attrlen, xlen;
3874                 if (end - p < 3)
3875                         goto short_pkt;
3876                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3877                 p += 2;                 /* cookie */
3878                 len = ntohl(*p++);      /* filename length */
3879                 if (len > NFS4_MAXNAMLEN) {
3880                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3881                                         len);
3882                         goto err_unmap;
3883                 }
3884                 xlen = XDR_QUADLEN(len);
3885                 if (end - p < xlen + 1)
3886                         goto short_pkt;
3887                 dprintk("filename = %*s\n", len, (char *)p);
3888                 p += xlen;
3889                 len = ntohl(*p++);      /* bitmap length */
3890                 if (end - p < len + 1)
3891                         goto short_pkt;
3892                 p += len;
3893                 attrlen = XDR_QUADLEN(ntohl(*p++));
3894                 if (end - p < attrlen + 2)
3895                         goto short_pkt;
3896                 p += attrlen;           /* attributes */
3897                 entry = p;
3898         }
3899         /*
3900          * Apparently some server sends responses that are a valid size, but
3901          * contain no entries, and have value_follows==0 and EOF==0. For
3902          * those, just set the EOF marker.
3903          */
3904         if (!nr && entry[1] == 0) {
3905                 dprintk("NFS: readdir reply truncated!\n");
3906                 entry[1] = 1;
3907         }
3908 out:
3909         kunmap_atomic(kaddr, KM_USER0);
3910         return 0;
3911 short_pkt:
3912         /*
3913          * When we get a short packet there are 2 possibilities. We can
3914          * return an error, or fix up the response to look like a valid
3915          * response and return what we have so far. If there are no
3916          * entries and the packet was short, then return -EIO. If there
3917          * are valid entries in the response, return them and pretend that
3918          * the call was successful, but incomplete. The caller can retry the
3919          * readdir starting at the last cookie.
3920          */
3921         dprintk("%s: short packet at entry %d\n", __func__, nr);
3922         entry[0] = entry[1] = 0;
3923         if (nr)
3924                 goto out;
3925 err_unmap:
3926         kunmap_atomic(kaddr, KM_USER0);
3927         return -errno_NFSERR_IO;
3928 }
3929
3930 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3931 {
3932         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3933         struct kvec *iov = rcvbuf->head;
3934         size_t hdrlen;
3935         u32 len, recvd;
3936         __be32 *p;
3937         char *kaddr;
3938         int status;
3939
3940         status = decode_op_hdr(xdr, OP_READLINK);
3941         if (status)
3942                 return status;
3943
3944         /* Convert length of symlink */
3945         READ_BUF(4);
3946         len = be32_to_cpup(p++);
3947         if (len >= rcvbuf->page_len || len <= 0) {
3948                 dprintk("nfs: server returned giant symlink!\n");
3949                 return -ENAMETOOLONG;
3950         }
3951         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3952         recvd = req->rq_rcv_buf.len - hdrlen;
3953         if (recvd < len) {
3954                 dprintk("NFS: server cheating in readlink reply: "
3955                                 "count %u > recvd %u\n", len, recvd);
3956                 return -EIO;
3957         }
3958         xdr_read_pages(xdr, len);
3959         /*
3960          * The XDR encode routine has set things up so that
3961          * the link text will be copied directly into the
3962          * buffer.  We just have to do overflow-checking,
3963          * and and null-terminate the text (the VFS expects
3964          * null-termination).
3965          */
3966         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3967         kaddr[len+rcvbuf->page_base] = '\0';
3968         kunmap_atomic(kaddr, KM_USER0);
3969         return 0;
3970 }
3971
3972 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3973 {
3974         int status;
3975
3976         status = decode_op_hdr(xdr, OP_REMOVE);
3977         if (status)
3978                 goto out;
3979         status = decode_change_info(xdr, cinfo);
3980 out:
3981         return status;
3982 }
3983
3984 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3985               struct nfs4_change_info *new_cinfo)
3986 {
3987         int status;
3988
3989         status = decode_op_hdr(xdr, OP_RENAME);
3990         if (status)
3991                 goto out;
3992         if ((status = decode_change_info(xdr, old_cinfo)))
3993                 goto out;
3994         status = decode_change_info(xdr, new_cinfo);
3995 out:
3996         return status;
3997 }
3998
3999 static int decode_renew(struct xdr_stream *xdr)
4000 {
4001         return decode_op_hdr(xdr, OP_RENEW);
4002 }
4003
4004 static int
4005 decode_restorefh(struct xdr_stream *xdr)
4006 {
4007         return decode_op_hdr(xdr, OP_RESTOREFH);
4008 }
4009
4010 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4011                 size_t *acl_len)
4012 {
4013         __be32 *savep;
4014         uint32_t attrlen,
4015                  bitmap[2] = {0};
4016         struct kvec *iov = req->rq_rcv_buf.head;
4017         int status;
4018
4019         *acl_len = 0;
4020         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4021                 goto out;
4022         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4023                 goto out;
4024         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4025                 goto out;
4026
4027         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4028                 return -EIO;
4029         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4030                 size_t hdrlen;
4031                 u32 recvd;
4032
4033                 /* We ignore &savep and don't do consistency checks on
4034                  * the attr length.  Let userspace figure it out.... */
4035                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4036                 recvd = req->rq_rcv_buf.len - hdrlen;
4037                 if (attrlen > recvd) {
4038                         dprintk("NFS: server cheating in getattr"
4039                                         " acl reply: attrlen %u > recvd %u\n",
4040                                         attrlen, recvd);
4041                         return -EINVAL;
4042                 }
4043                 xdr_read_pages(xdr, attrlen);
4044                 *acl_len = attrlen;
4045         } else
4046                 status = -EOPNOTSUPP;
4047
4048 out:
4049         return status;
4050 }
4051
4052 static int
4053 decode_savefh(struct xdr_stream *xdr)
4054 {
4055         return decode_op_hdr(xdr, OP_SAVEFH);
4056 }
4057
4058 static int decode_setattr(struct xdr_stream *xdr)
4059 {
4060         __be32 *p;
4061         uint32_t bmlen;
4062         int status;
4063
4064         status = decode_op_hdr(xdr, OP_SETATTR);
4065         if (status)
4066                 return status;
4067         READ_BUF(4);
4068         bmlen = be32_to_cpup(p++);
4069         READ_BUF(bmlen << 2);
4070         return 0;
4071 }
4072
4073 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4074 {
4075         __be32 *p;
4076         uint32_t opnum;
4077         int32_t nfserr;
4078
4079         READ_BUF(8);
4080         opnum = be32_to_cpup(p++);
4081         if (opnum != OP_SETCLIENTID) {
4082                 dprintk("nfs: decode_setclientid: Server returned operation"
4083                         " %d\n", opnum);
4084                 return -EIO;
4085         }
4086         nfserr = be32_to_cpup(p++);
4087         if (nfserr == NFS_OK) {
4088                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
4089                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4090                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
4091         } else if (nfserr == NFSERR_CLID_INUSE) {
4092                 uint32_t len;
4093
4094                 /* skip netid string */
4095                 READ_BUF(4);
4096                 len = be32_to_cpup(p++);
4097                 READ_BUF(len);
4098
4099                 /* skip uaddr string */
4100                 READ_BUF(4);
4101                 len = be32_to_cpup(p++);
4102                 READ_BUF(len);
4103                 return -NFSERR_CLID_INUSE;
4104         } else
4105                 return nfs4_stat_to_errno(nfserr);
4106
4107         return 0;
4108 }
4109
4110 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4111 {
4112         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4113 }
4114
4115 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4116 {
4117         __be32 *p;
4118         int status;
4119
4120         status = decode_op_hdr(xdr, OP_WRITE);
4121         if (status)
4122                 return status;
4123
4124         READ_BUF(16);
4125         res->count = be32_to_cpup(p++);
4126         res->verf->committed = be32_to_cpup(p++);
4127         COPYMEM(res->verf->verifier, 8);
4128         return 0;
4129 }
4130
4131 static int decode_delegreturn(struct xdr_stream *xdr)
4132 {
4133         return decode_op_hdr(xdr, OP_DELEGRETURN);
4134 }
4135
4136 #if defined(CONFIG_NFS_V4_1)
4137 static int decode_exchange_id(struct xdr_stream *xdr,
4138                               struct nfs41_exchange_id_res *res)
4139 {
4140         __be32 *p;
4141         uint32_t dummy;
4142         int status;
4143         struct nfs_client *clp = res->client;
4144
4145         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4146         if (status)
4147                 return status;
4148
4149         READ_BUF(8);
4150         p = xdr_decode_hyper(p, &clp->cl_ex_clid);
4151         READ_BUF(12);
4152         clp->cl_seqid = be32_to_cpup(p++);
4153         clp->cl_exchange_flags = be32_to_cpup(p++);
4154
4155         /* We ask for SP4_NONE */
4156         dummy = be32_to_cpup(p++);
4157         if (dummy != SP4_NONE)
4158                 return -EIO;
4159
4160         /* Throw away minor_id */
4161         READ_BUF(8);
4162
4163         /* Throw away Major id */
4164         READ_BUF(4);
4165         dummy = be32_to_cpup(p++);
4166         READ_BUF(dummy);
4167
4168         /* Throw away server_scope */
4169         READ_BUF(4);
4170         dummy = be32_to_cpup(p++);
4171         READ_BUF(dummy);
4172
4173         /* Throw away Implementation id array */
4174         READ_BUF(4);
4175         dummy = be32_to_cpup(p++);
4176         READ_BUF(dummy);
4177
4178         return 0;
4179 }
4180
4181 static int decode_chan_attrs(struct xdr_stream *xdr,
4182                              struct nfs4_channel_attrs *attrs)
4183 {
4184         __be32 *p;
4185         u32 nr_attrs;
4186
4187         READ_BUF(28);
4188         attrs->headerpadsz = be32_to_cpup(p++);
4189         attrs->max_rqst_sz = be32_to_cpup(p++);
4190         attrs->max_resp_sz = be32_to_cpup(p++);
4191         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4192         attrs->max_ops = be32_to_cpup(p++);
4193         attrs->max_reqs = be32_to_cpup(p++);
4194         nr_attrs = be32_to_cpup(p++);
4195         if (unlikely(nr_attrs > 1)) {
4196                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4197                         __func__, nr_attrs);
4198                 return -EINVAL;
4199         }
4200         if (nr_attrs == 1)
4201                 READ_BUF(4); /* skip rdma_attrs */
4202         return 0;
4203 }
4204
4205 static int decode_create_session(struct xdr_stream *xdr,
4206                                  struct nfs41_create_session_res *res)
4207 {
4208         __be32 *p;
4209         int status;
4210         struct nfs_client *clp = res->client;
4211         struct nfs4_session *session = clp->cl_session;
4212
4213         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4214
4215         if (status)
4216                 return status;
4217
4218         /* sessionid */
4219         READ_BUF(NFS4_MAX_SESSIONID_LEN);
4220         COPYMEM(&session->sess_id, NFS4_MAX_SESSIONID_LEN);
4221
4222         /* seqid, flags */
4223         READ_BUF(8);
4224         clp->cl_seqid = be32_to_cpup(p++);
4225         session->flags = be32_to_cpup(p++);
4226
4227         /* Channel attributes */
4228         status = decode_chan_attrs(xdr, &session->fc_attrs);
4229         if (!status)
4230                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4231         return status;
4232 }
4233
4234 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4235 {
4236         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4237 }
4238 #endif /* CONFIG_NFS_V4_1 */
4239
4240 static int decode_sequence(struct xdr_stream *xdr,
4241                            struct nfs4_sequence_res *res,
4242                            struct rpc_rqst *rqstp)
4243 {
4244 #if defined(CONFIG_NFS_V4_1)
4245         struct nfs4_slot *slot;
4246         struct nfs4_sessionid id;
4247         u32 dummy;
4248         int status;
4249         __be32 *p;
4250
4251         if (!res->sr_session)
4252                 return 0;
4253
4254         status = decode_op_hdr(xdr, OP_SEQUENCE);
4255         if (status)
4256                 goto out_err;
4257
4258         /*
4259          * If the server returns different values for sessionID, slotID or
4260          * sequence number, the server is looney tunes.
4261          */
4262         status = -ESERVERFAULT;
4263
4264         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4265         READ_BUF(NFS4_MAX_SESSIONID_LEN + 20);
4266         COPYMEM(id.data, NFS4_MAX_SESSIONID_LEN);
4267         if (memcmp(id.data, res->sr_session->sess_id.data,
4268                    NFS4_MAX_SESSIONID_LEN)) {
4269                 dprintk("%s Invalid session id\n", __func__);
4270                 goto out_err;
4271         }
4272         /* seqid */
4273         dummy = be32_to_cpup(p++);
4274         if (dummy != slot->seq_nr) {
4275                 dprintk("%s Invalid sequence number\n", __func__);
4276                 goto out_err;
4277         }
4278         /* slot id */
4279         dummy = be32_to_cpup(p++);
4280         if (dummy != res->sr_slotid) {
4281                 dprintk("%s Invalid slot id\n", __func__);
4282                 goto out_err;
4283         }
4284         /* highest slot id - currently not processed */
4285         dummy = be32_to_cpup(p++);
4286         /* target highest slot id - currently not processed */
4287         dummy = be32_to_cpup(p++);
4288         /* result flags - currently not processed */
4289         dummy = be32_to_cpup(p++);
4290         status = 0;
4291 out_err:
4292         res->sr_status = status;
4293         return status;
4294 #else  /* CONFIG_NFS_V4_1 */
4295         return 0;
4296 #endif /* CONFIG_NFS_V4_1 */
4297 }
4298
4299 /*
4300  * END OF "GENERIC" DECODE ROUTINES.
4301  */
4302
4303 /*
4304  * Decode OPEN_DOWNGRADE response
4305  */
4306 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4307 {
4308         struct xdr_stream xdr;
4309         struct compound_hdr hdr;
4310         int status;
4311
4312         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4313         status = decode_compound_hdr(&xdr, &hdr);
4314         if (status)
4315                 goto out;
4316         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4317         if (status)
4318                 goto out;
4319         status = decode_putfh(&xdr);
4320         if (status)
4321                 goto out;
4322         status = decode_open_downgrade(&xdr, res);
4323         if (status != 0)
4324                 goto out;
4325         decode_getfattr(&xdr, res->fattr, res->server);
4326 out:
4327         return status;
4328 }
4329
4330 /*
4331  * Decode ACCESS response
4332  */
4333 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4334 {
4335         struct xdr_stream xdr;
4336         struct compound_hdr hdr;
4337         int status;
4338
4339         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4340         status = decode_compound_hdr(&xdr, &hdr);
4341         if (status)
4342                 goto out;
4343         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4344         if (status)
4345                 goto out;
4346         status = decode_putfh(&xdr);
4347         if (status != 0)
4348                 goto out;
4349         status = decode_access(&xdr, res);
4350         if (status != 0)
4351                 goto out;
4352         decode_getfattr(&xdr, res->fattr, res->server);
4353 out:
4354         return status;
4355 }
4356
4357 /*
4358  * Decode LOOKUP response
4359  */
4360 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4361 {
4362         struct xdr_stream xdr;
4363         struct compound_hdr hdr;
4364         int status;
4365
4366         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4367         status = decode_compound_hdr(&xdr, &hdr);
4368         if (status)
4369                 goto out;
4370         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4371         if (status)
4372                 goto out;
4373         if ((status = decode_putfh(&xdr)) != 0)
4374                 goto out;
4375         if ((status = decode_lookup(&xdr)) != 0)
4376                 goto out;
4377         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4378                 goto out;
4379         status = decode_getfattr(&xdr, res->fattr, res->server);
4380 out:
4381         return status;
4382 }
4383
4384 /*
4385  * Decode LOOKUP_ROOT response
4386  */
4387 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4388 {
4389         struct xdr_stream xdr;
4390         struct compound_hdr hdr;
4391         int status;
4392
4393         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4394         status = decode_compound_hdr(&xdr, &hdr);
4395         if (status)
4396                 goto out;
4397         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4398         if (status)
4399                 goto out;
4400         if ((status = decode_putrootfh(&xdr)) != 0)
4401                 goto out;
4402         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4403                 status = decode_getfattr(&xdr, res->fattr, res->server);
4404 out:
4405         return status;
4406 }
4407
4408 /*
4409  * Decode REMOVE response
4410  */
4411 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4412 {
4413         struct xdr_stream xdr;
4414         struct compound_hdr hdr;
4415         int status;
4416
4417         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4418         status = decode_compound_hdr(&xdr, &hdr);
4419         if (status)
4420                 goto out;
4421         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4422         if (status)
4423                 goto out;
4424         if ((status = decode_putfh(&xdr)) != 0)
4425                 goto out;
4426         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4427                 goto out;
4428         decode_getfattr(&xdr, &res->dir_attr, res->server);
4429 out:
4430         return status;
4431 }
4432
4433 /*
4434  * Decode RENAME response
4435  */
4436 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4437 {
4438         struct xdr_stream xdr;
4439         struct compound_hdr hdr;
4440         int status;
4441
4442         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4443         status = decode_compound_hdr(&xdr, &hdr);
4444         if (status)
4445                 goto out;
4446         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4447         if (status)
4448                 goto out;
4449         if ((status = decode_putfh(&xdr)) != 0)
4450                 goto out;
4451         if ((status = decode_savefh(&xdr)) != 0)
4452                 goto out;
4453         if ((status = decode_putfh(&xdr)) != 0)
4454                 goto out;
4455         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4456                 goto out;
4457         /* Current FH is target directory */
4458         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4459                 goto out;
4460         if ((status = decode_restorefh(&xdr)) != 0)
4461                 goto out;
4462         decode_getfattr(&xdr, res->old_fattr, res->server);
4463 out:
4464         return status;
4465 }
4466
4467 /*
4468  * Decode LINK response
4469  */
4470 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4471 {
4472         struct xdr_stream xdr;
4473         struct compound_hdr hdr;
4474         int status;
4475
4476         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4477         status = decode_compound_hdr(&xdr, &hdr);
4478         if (status)
4479                 goto out;
4480         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4481         if (status)
4482                 goto out;
4483         if ((status = decode_putfh(&xdr)) != 0)
4484                 goto out;
4485         if ((status = decode_savefh(&xdr)) != 0)
4486                 goto out;
4487         if ((status = decode_putfh(&xdr)) != 0)
4488                 goto out;
4489         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4490                 goto out;
4491         /*
4492          * Note order: OP_LINK leaves the directory as the current
4493          *             filehandle.
4494          */
4495         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4496                 goto out;
4497         if ((status = decode_restorefh(&xdr)) != 0)
4498                 goto out;
4499         decode_getfattr(&xdr, res->fattr, res->server);
4500 out:
4501         return status;
4502 }
4503
4504 /*
4505  * Decode CREATE response
4506  */
4507 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4508 {
4509         struct xdr_stream xdr;
4510         struct compound_hdr hdr;
4511         int status;
4512
4513         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4514         status = decode_compound_hdr(&xdr, &hdr);
4515         if (status)
4516                 goto out;
4517         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4518         if (status)
4519                 goto out;
4520         if ((status = decode_putfh(&xdr)) != 0)
4521                 goto out;
4522         if ((status = decode_savefh(&xdr)) != 0)
4523                 goto out;
4524         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4525                 goto out;
4526         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4527                 goto out;
4528         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4529                 goto out;
4530         if ((status = decode_restorefh(&xdr)) != 0)
4531                 goto out;
4532         decode_getfattr(&xdr, res->dir_fattr, res->server);
4533 out:
4534         return status;
4535 }
4536
4537 /*
4538  * Decode SYMLINK response
4539  */
4540 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4541 {
4542         return nfs4_xdr_dec_create(rqstp, p, res);
4543 }
4544
4545 /*
4546  * Decode GETATTR response
4547  */
4548 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4549 {
4550         struct xdr_stream xdr;
4551         struct compound_hdr hdr;
4552         int status;
4553
4554         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4555         status = decode_compound_hdr(&xdr, &hdr);
4556         if (status)
4557                 goto out;
4558         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4559         if (status)
4560                 goto out;
4561         status = decode_putfh(&xdr);
4562         if (status)
4563                 goto out;
4564         status = decode_getfattr(&xdr, res->fattr, res->server);
4565 out:
4566         return status;
4567 }
4568
4569 /*
4570  * Encode an SETACL request
4571  */
4572 static int
4573 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4574 {
4575         struct xdr_stream xdr;
4576         struct compound_hdr hdr = {
4577                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4578         };
4579         int status;
4580
4581         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4582         encode_compound_hdr(&xdr, req, &hdr);
4583         encode_sequence(&xdr, &args->seq_args, &hdr);
4584         encode_putfh(&xdr, args->fh, &hdr);
4585         status = encode_setacl(&xdr, args, &hdr);
4586         encode_nops(&hdr);
4587         return status;
4588 }
4589
4590 /*
4591  * Decode SETACL response
4592  */
4593 static int
4594 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4595                     struct nfs_setaclres *res)
4596 {
4597         struct xdr_stream xdr;
4598         struct compound_hdr hdr;
4599         int status;
4600
4601         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4602         status = decode_compound_hdr(&xdr, &hdr);
4603         if (status)
4604                 goto out;
4605         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4606         if (status)
4607                 goto out;
4608         status = decode_putfh(&xdr);
4609         if (status)
4610                 goto out;
4611         status = decode_setattr(&xdr);
4612 out:
4613         return status;
4614 }
4615
4616 /*
4617  * Decode GETACL response
4618  */
4619 static int
4620 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4621                     struct nfs_getaclres *res)
4622 {
4623         struct xdr_stream xdr;
4624         struct compound_hdr hdr;
4625         int status;
4626
4627         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4628         status = decode_compound_hdr(&xdr, &hdr);
4629         if (status)
4630                 goto out;
4631         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4632         if (status)
4633                 goto out;
4634         status = decode_putfh(&xdr);
4635         if (status)
4636                 goto out;
4637         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4638
4639 out:
4640         return status;
4641 }
4642
4643 /*
4644  * Decode CLOSE response
4645  */
4646 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4647 {
4648         struct xdr_stream xdr;
4649         struct compound_hdr hdr;
4650         int status;
4651
4652         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4653         status = decode_compound_hdr(&xdr, &hdr);
4654         if (status)
4655                 goto out;
4656         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4657         if (status)
4658                 goto out;
4659         status = decode_putfh(&xdr);
4660         if (status)
4661                 goto out;
4662         status = decode_close(&xdr, res);
4663         if (status != 0)
4664                 goto out;
4665         /*
4666          * Note: Server may do delete on close for this file
4667          *      in which case the getattr call will fail with
4668          *      an ESTALE error. Shouldn't be a problem,
4669          *      though, since fattr->valid will remain unset.
4670          */
4671         decode_getfattr(&xdr, res->fattr, res->server);
4672 out:
4673         return status;
4674 }
4675
4676 /*
4677  * Decode OPEN response
4678  */
4679 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4680 {
4681         struct xdr_stream xdr;
4682         struct compound_hdr hdr;
4683         int status;
4684
4685         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4686         status = decode_compound_hdr(&xdr, &hdr);
4687         if (status)
4688                 goto out;
4689         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4690         if (status)
4691                 goto out;
4692         status = decode_putfh(&xdr);
4693         if (status)
4694                 goto out;
4695         status = decode_savefh(&xdr);
4696         if (status)
4697                 goto out;
4698         status = decode_open(&xdr, res);
4699         if (status)
4700                 goto out;
4701         if (decode_getfh(&xdr, &res->fh) != 0)
4702                 goto out;
4703         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4704                 goto out;
4705         if (decode_restorefh(&xdr) != 0)
4706                 goto out;
4707         decode_getfattr(&xdr, res->dir_attr, res->server);
4708 out:
4709         return status;
4710 }
4711
4712 /*
4713  * Decode OPEN_CONFIRM response
4714  */
4715 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4716 {
4717         struct xdr_stream xdr;
4718         struct compound_hdr hdr;
4719         int status;
4720
4721         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4722         status = decode_compound_hdr(&xdr, &hdr);
4723         if (status)
4724                 goto out;
4725         status = decode_putfh(&xdr);
4726         if (status)
4727                 goto out;
4728         status = decode_open_confirm(&xdr, res);
4729 out:
4730         return status;
4731 }
4732
4733 /*
4734  * Decode OPEN response
4735  */
4736 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4737 {
4738         struct xdr_stream xdr;
4739         struct compound_hdr hdr;
4740         int status;
4741
4742         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4743         status = decode_compound_hdr(&xdr, &hdr);
4744         if (status)
4745                 goto out;
4746         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4747         if (status)
4748                 goto out;
4749         status = decode_putfh(&xdr);
4750         if (status)
4751                 goto out;
4752         status = decode_open(&xdr, res);
4753         if (status)
4754                 goto out;
4755         decode_getfattr(&xdr, res->f_attr, res->server);
4756 out:
4757         return status;
4758 }
4759
4760 /*
4761  * Decode SETATTR response
4762  */
4763 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4764 {
4765         struct xdr_stream xdr;
4766         struct compound_hdr hdr;
4767         int status;
4768
4769         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4770         status = decode_compound_hdr(&xdr, &hdr);
4771         if (status)
4772                 goto out;
4773         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4774         if (status)
4775                 goto out;
4776         status = decode_putfh(&xdr);
4777         if (status)
4778                 goto out;
4779         status = decode_setattr(&xdr);
4780         if (status)
4781                 goto out;
4782         decode_getfattr(&xdr, res->fattr, res->server);
4783 out:
4784         return status;
4785 }
4786
4787 /*
4788  * Decode LOCK response
4789  */
4790 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4791 {
4792         struct xdr_stream xdr;
4793         struct compound_hdr hdr;
4794         int status;
4795
4796         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4797         status = decode_compound_hdr(&xdr, &hdr);
4798         if (status)
4799                 goto out;
4800         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4801         if (status)
4802                 goto out;
4803         status = decode_putfh(&xdr);
4804         if (status)
4805                 goto out;
4806         status = decode_lock(&xdr, res);
4807 out:
4808         return status;
4809 }
4810
4811 /*
4812  * Decode LOCKT response
4813  */
4814 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4815 {
4816         struct xdr_stream xdr;
4817         struct compound_hdr hdr;
4818         int status;
4819
4820         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4821         status = decode_compound_hdr(&xdr, &hdr);
4822         if (status)
4823                 goto out;
4824         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4825         if (status)
4826                 goto out;
4827         status = decode_putfh(&xdr);
4828         if (status)
4829                 goto out;
4830         status = decode_lockt(&xdr, res);
4831 out:
4832         return status;
4833 }
4834
4835 /*
4836  * Decode LOCKU response
4837  */
4838 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4839 {
4840         struct xdr_stream xdr;
4841         struct compound_hdr hdr;
4842         int status;
4843
4844         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4845         status = decode_compound_hdr(&xdr, &hdr);
4846         if (status)
4847                 goto out;
4848         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4849         if (status)
4850                 goto out;
4851         status = decode_putfh(&xdr);
4852         if (status)
4853                 goto out;
4854         status = decode_locku(&xdr, res);
4855 out:
4856         return status;
4857 }
4858
4859 /*
4860  * Decode READLINK response
4861  */
4862 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4863                                  struct nfs4_readlink_res *res)
4864 {
4865         struct xdr_stream xdr;
4866         struct compound_hdr hdr;
4867         int status;
4868
4869         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4870         status = decode_compound_hdr(&xdr, &hdr);
4871         if (status)
4872                 goto out;
4873         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4874         if (status)
4875                 goto out;
4876         status = decode_putfh(&xdr);
4877         if (status)
4878                 goto out;
4879         status = decode_readlink(&xdr, rqstp);
4880 out:
4881         return status;
4882 }
4883
4884 /*
4885  * Decode READDIR response
4886  */
4887 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4888 {
4889         struct xdr_stream xdr;
4890         struct compound_hdr hdr;
4891         int status;
4892
4893         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4894         status = decode_compound_hdr(&xdr, &hdr);
4895         if (status)
4896                 goto out;
4897         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4898         if (status)
4899                 goto out;
4900         status = decode_putfh(&xdr);
4901         if (status)
4902                 goto out;
4903         status = decode_readdir(&xdr, rqstp, res);
4904 out:
4905         return status;
4906 }
4907
4908 /*
4909  * Decode Read response
4910  */
4911 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4912 {
4913         struct xdr_stream xdr;
4914         struct compound_hdr hdr;
4915         int status;
4916
4917         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4918         status = decode_compound_hdr(&xdr, &hdr);
4919         if (status)
4920                 goto out;
4921         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4922         if (status)
4923                 goto out;
4924         status = decode_putfh(&xdr);
4925         if (status)
4926                 goto out;
4927         status = decode_read(&xdr, rqstp, res);
4928         if (!status)
4929                 status = res->count;
4930 out:
4931         return status;
4932 }
4933
4934 /*
4935  * Decode WRITE response
4936  */
4937 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4938 {
4939         struct xdr_stream xdr;
4940         struct compound_hdr hdr;
4941         int status;
4942
4943         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4944         status = decode_compound_hdr(&xdr, &hdr);
4945         if (status)
4946                 goto out;
4947         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4948         if (status)
4949                 goto out;
4950         status = decode_putfh(&xdr);
4951         if (status)
4952                 goto out;
4953         status = decode_write(&xdr, res);
4954         if (status)
4955                 goto out;
4956         decode_getfattr(&xdr, res->fattr, res->server);
4957         if (!status)
4958                 status = res->count;
4959 out:
4960         return status;
4961 }
4962
4963 /*
4964  * Decode COMMIT response
4965  */
4966 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4967 {
4968         struct xdr_stream xdr;
4969         struct compound_hdr hdr;
4970         int status;
4971
4972         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4973         status = decode_compound_hdr(&xdr, &hdr);
4974         if (status)
4975                 goto out;
4976         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4977         if (status)
4978                 goto out;
4979         status = decode_putfh(&xdr);
4980         if (status)
4981                 goto out;
4982         status = decode_commit(&xdr, res);
4983         if (status)
4984                 goto out;
4985         decode_getfattr(&xdr, res->fattr, res->server);
4986 out:
4987         return status;
4988 }
4989
4990 /*
4991  * FSINFO request
4992  */
4993 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
4994                                struct nfs4_fsinfo_res *res)
4995 {
4996         struct xdr_stream xdr;
4997         struct compound_hdr hdr;
4998         int status;
4999
5000         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5001         status = decode_compound_hdr(&xdr, &hdr);
5002         if (!status)
5003                 status = decode_sequence(&xdr, &res->seq_res, req);
5004         if (!status)
5005                 status = decode_putfh(&xdr);
5006         if (!status)
5007                 status = decode_fsinfo(&xdr, res->fsinfo);
5008         return status;
5009 }
5010
5011 /*
5012  * PATHCONF request
5013  */
5014 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5015                                  struct nfs4_pathconf_res *res)
5016 {
5017         struct xdr_stream xdr;
5018         struct compound_hdr hdr;
5019         int status;
5020
5021         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5022         status = decode_compound_hdr(&xdr, &hdr);
5023         if (!status)
5024                 status = decode_sequence(&xdr, &res->seq_res, req);
5025         if (!status)
5026                 status = decode_putfh(&xdr);
5027         if (!status)
5028                 status = decode_pathconf(&xdr, res->pathconf);
5029         return status;
5030 }
5031
5032 /*
5033  * STATFS request
5034  */
5035 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5036                                struct nfs4_statfs_res *res)
5037 {
5038         struct xdr_stream xdr;
5039         struct compound_hdr hdr;
5040         int status;
5041
5042         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5043         status = decode_compound_hdr(&xdr, &hdr);
5044         if (!status)
5045                 status = decode_sequence(&xdr, &res->seq_res, req);
5046         if (!status)
5047                 status = decode_putfh(&xdr);
5048         if (!status)
5049                 status = decode_statfs(&xdr, res->fsstat);
5050         return status;
5051 }
5052
5053 /*
5054  * GETATTR_BITMAP request
5055  */
5056 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5057 {
5058         struct xdr_stream xdr;
5059         struct compound_hdr hdr;
5060         int status;
5061
5062         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5063         status = decode_compound_hdr(&xdr, &hdr);
5064         if (status)
5065                 goto out;
5066         status = decode_sequence(&xdr, &res->seq_res, req);
5067         if (status)
5068                 goto out;
5069         if ((status = decode_putfh(&xdr)) != 0)
5070                 goto out;
5071         status = decode_server_caps(&xdr, res);
5072 out:
5073         return status;
5074 }
5075
5076 /*
5077  * Decode RENEW response
5078  */
5079 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5080 {
5081         struct xdr_stream xdr;
5082         struct compound_hdr hdr;
5083         int status;
5084
5085         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5086         status = decode_compound_hdr(&xdr, &hdr);
5087         if (!status)
5088                 status = decode_renew(&xdr);
5089         return status;
5090 }
5091
5092 /*
5093  * a SETCLIENTID request
5094  */
5095 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5096                 struct nfs_client *clp)
5097 {
5098         struct xdr_stream xdr;
5099         struct compound_hdr hdr;
5100         int status;
5101
5102         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5103         status = decode_compound_hdr(&xdr, &hdr);
5104         if (!status)
5105                 status = decode_setclientid(&xdr, clp);
5106         return status;
5107 }
5108
5109 /*
5110  * a SETCLIENTID_CONFIRM request
5111  */
5112 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5113 {
5114         struct xdr_stream xdr;
5115         struct compound_hdr hdr;
5116         int status;
5117
5118         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5119         status = decode_compound_hdr(&xdr, &hdr);
5120         if (!status)
5121                 status = decode_setclientid_confirm(&xdr);
5122         if (!status)
5123                 status = decode_putrootfh(&xdr);
5124         if (!status)
5125                 status = decode_fsinfo(&xdr, fsinfo);
5126         return status;
5127 }
5128
5129 /*
5130  * DELEGRETURN request
5131  */
5132 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5133 {
5134         struct xdr_stream xdr;
5135         struct compound_hdr hdr;
5136         int status;
5137
5138         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5139         status = decode_compound_hdr(&xdr, &hdr);
5140         if (status)
5141                 goto out;
5142         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5143         if (status)
5144                 goto out;
5145         status = decode_putfh(&xdr);
5146         if (status != 0)
5147                 goto out;
5148         status = decode_delegreturn(&xdr);
5149         decode_getfattr(&xdr, res->fattr, res->server);
5150 out:
5151         return status;
5152 }
5153
5154 /*
5155  * FS_LOCATIONS request
5156  */
5157 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5158                                      struct nfs4_fs_locations_res *res)
5159 {
5160         struct xdr_stream xdr;
5161         struct compound_hdr hdr;
5162         int status;
5163
5164         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5165         status = decode_compound_hdr(&xdr, &hdr);
5166         if (status)
5167                 goto out;
5168         status = decode_sequence(&xdr, &res->seq_res, req);
5169         if (status)
5170                 goto out;
5171         if ((status = decode_putfh(&xdr)) != 0)
5172                 goto out;
5173         if ((status = decode_lookup(&xdr)) != 0)
5174                 goto out;
5175         xdr_enter_page(&xdr, PAGE_SIZE);
5176         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5177                                  res->fs_locations->server);
5178 out:
5179         return status;
5180 }
5181
5182 #if defined(CONFIG_NFS_V4_1)
5183 /*
5184  * EXCHANGE_ID request
5185  */
5186 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5187                                     void *res)
5188 {
5189         struct xdr_stream xdr;
5190         struct compound_hdr hdr;
5191         int status;
5192
5193         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5194         status = decode_compound_hdr(&xdr, &hdr);
5195         if (!status)
5196                 status = decode_exchange_id(&xdr, res);
5197         return status;
5198 }
5199
5200 /*
5201  * a CREATE_SESSION request
5202  */
5203 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5204                                        struct nfs41_create_session_res *res)
5205 {
5206         struct xdr_stream xdr;
5207         struct compound_hdr hdr;
5208         int status;
5209
5210         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5211         status = decode_compound_hdr(&xdr, &hdr);
5212         if (!status)
5213                 status = decode_create_session(&xdr, res);
5214         return status;
5215 }
5216
5217 /*
5218  * a DESTROY_SESSION request
5219  */
5220 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5221                                         void *dummy)
5222 {
5223         struct xdr_stream xdr;
5224         struct compound_hdr hdr;
5225         int status;
5226
5227         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5228         status = decode_compound_hdr(&xdr, &hdr);
5229         if (!status)
5230                 status = decode_destroy_session(&xdr, dummy);
5231         return status;
5232 }
5233
5234 /*
5235  * a SEQUENCE request
5236  */
5237 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5238                                  struct nfs4_sequence_res *res)
5239 {
5240         struct xdr_stream xdr;
5241         struct compound_hdr hdr;
5242         int status;
5243
5244         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5245         status = decode_compound_hdr(&xdr, &hdr);
5246         if (!status)
5247                 status = decode_sequence(&xdr, res, rqstp);
5248         return status;
5249 }
5250
5251 /*
5252  * a GET_LEASE_TIME request
5253  */
5254 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5255                                        struct nfs4_get_lease_time_res *res)
5256 {
5257         struct xdr_stream xdr;
5258         struct compound_hdr hdr;
5259         int status;
5260
5261         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5262         status = decode_compound_hdr(&xdr, &hdr);
5263         if (!status)
5264                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5265         if (!status)
5266                 status = decode_putrootfh(&xdr);
5267         if (!status)
5268                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5269         return status;
5270 }
5271 #endif /* CONFIG_NFS_V4_1 */
5272
5273 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5274 {
5275         uint32_t bitmap[2] = {0};
5276         uint32_t len;
5277
5278         if (!*p++) {
5279                 if (!*p)
5280                         return ERR_PTR(-EAGAIN);
5281                 entry->eof = 1;
5282                 return ERR_PTR(-EBADCOOKIE);
5283         }
5284
5285         entry->prev_cookie = entry->cookie;
5286         p = xdr_decode_hyper(p, &entry->cookie);
5287         entry->len = ntohl(*p++);
5288         entry->name = (const char *) p;
5289         p += XDR_QUADLEN(entry->len);
5290
5291         /*
5292          * In case the server doesn't return an inode number,
5293          * we fake one here.  (We don't use inode number 0,
5294          * since glibc seems to choke on it...)
5295          */
5296         entry->ino = 1;
5297
5298         len = ntohl(*p++);              /* bitmap length */
5299         if (len-- > 0) {
5300                 bitmap[0] = ntohl(*p++);
5301                 if (len-- > 0) {
5302                         bitmap[1] = ntohl(*p++);
5303                         p += len;
5304                 }
5305         }
5306         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5307         if (len > 0) {
5308                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5309                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5310                         /* Ignore the return value of rdattr_error for now */
5311                         p++;
5312                         len--;
5313                 }
5314                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5315                         xdr_decode_hyper(p, &entry->ino);
5316                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5317                         xdr_decode_hyper(p, &entry->ino);
5318                 p += len;
5319         }
5320
5321         entry->eof = !p[0] && p[1];
5322         return p;
5323 }
5324
5325 /*
5326  * We need to translate between nfs status return values and
5327  * the local errno values which may not be the same.
5328  */
5329 static struct {
5330         int stat;
5331         int errno;
5332 } nfs_errtbl[] = {
5333         { NFS4_OK,              0               },
5334         { NFS4ERR_PERM,         -EPERM          },
5335         { NFS4ERR_NOENT,        -ENOENT         },
5336         { NFS4ERR_IO,           -errno_NFSERR_IO},
5337         { NFS4ERR_NXIO,         -ENXIO          },
5338         { NFS4ERR_ACCESS,       -EACCES         },
5339         { NFS4ERR_EXIST,        -EEXIST         },
5340         { NFS4ERR_XDEV,         -EXDEV          },
5341         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5342         { NFS4ERR_ISDIR,        -EISDIR         },
5343         { NFS4ERR_INVAL,        -EINVAL         },
5344         { NFS4ERR_FBIG,         -EFBIG          },
5345         { NFS4ERR_NOSPC,        -ENOSPC         },
5346         { NFS4ERR_ROFS,         -EROFS          },
5347         { NFS4ERR_MLINK,        -EMLINK         },
5348         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5349         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5350         { NFS4ERR_DQUOT,        -EDQUOT         },
5351         { NFS4ERR_STALE,        -ESTALE         },
5352         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5353         { NFS4ERR_BADOWNER,     -EINVAL         },
5354         { NFS4ERR_BADNAME,      -EINVAL         },
5355         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5356         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5357         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5358         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5359         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5360         { NFS4ERR_LOCKED,       -EAGAIN         },
5361         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5362         { NFS4ERR_SYMLINK,      -ELOOP          },
5363         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5364         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5365         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5366                                                     * to be handled by a
5367                                                     * middle-layer.
5368                                                     */
5369         { -1,                   -EIO            }
5370 };
5371
5372 /*
5373  * Convert an NFS error code to a local one.
5374  * This one is used jointly by NFSv2 and NFSv3.
5375  */
5376 static int
5377 nfs4_stat_to_errno(int stat)
5378 {
5379         int i;
5380         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5381                 if (nfs_errtbl[i].stat == stat)
5382                         return nfs_errtbl[i].errno;
5383         }
5384         if (stat <= 10000 || stat > 10100) {
5385                 /* The server is looney tunes. */
5386                 return -ESERVERFAULT;
5387         }
5388         /* If we cannot translate the error, the recovery routines should
5389          * handle it.
5390          * Note: remaining NFSv4 error codes have values > 10000, so should
5391          * not conflict with native Linux error codes.
5392          */
5393         return -stat;
5394 }
5395
5396 #define PROC(proc, argtype, restype)                            \
5397 [NFSPROC4_CLNT_##proc] = {                                      \
5398         .p_proc   = NFSPROC4_COMPOUND,                          \
5399         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5400         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5401         .p_arglen = NFS4_##argtype##_sz,                        \
5402         .p_replen = NFS4_##restype##_sz,                        \
5403         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5404         .p_name   = #proc,                                      \
5405 }
5406
5407 struct rpc_procinfo     nfs4_procedures[] = {
5408   PROC(READ,            enc_read,       dec_read),
5409   PROC(WRITE,           enc_write,      dec_write),
5410   PROC(COMMIT,          enc_commit,     dec_commit),
5411   PROC(OPEN,            enc_open,       dec_open),
5412   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5413   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5414   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5415   PROC(CLOSE,           enc_close,      dec_close),
5416   PROC(SETATTR,         enc_setattr,    dec_setattr),
5417   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5418   PROC(RENEW,           enc_renew,      dec_renew),
5419   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5420   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5421   PROC(LOCK,            enc_lock,       dec_lock),
5422   PROC(LOCKT,           enc_lockt,      dec_lockt),
5423   PROC(LOCKU,           enc_locku,      dec_locku),
5424   PROC(ACCESS,          enc_access,     dec_access),
5425   PROC(GETATTR,         enc_getattr,    dec_getattr),
5426   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5427   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5428   PROC(REMOVE,          enc_remove,     dec_remove),
5429   PROC(RENAME,          enc_rename,     dec_rename),
5430   PROC(LINK,            enc_link,       dec_link),
5431   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5432   PROC(CREATE,          enc_create,     dec_create),
5433   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5434   PROC(STATFS,          enc_statfs,     dec_statfs),
5435   PROC(READLINK,        enc_readlink,   dec_readlink),
5436   PROC(READDIR,         enc_readdir,    dec_readdir),
5437   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5438   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5439   PROC(GETACL,          enc_getacl,     dec_getacl),
5440   PROC(SETACL,          enc_setacl,     dec_setacl),
5441   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5442 #if defined(CONFIG_NFS_V4_1)
5443   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5444   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5445   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5446   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5447   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5448 #endif /* CONFIG_NFS_V4_1 */
5449 };
5450
5451 struct rpc_version              nfs_version4 = {
5452         .number                 = 4,
5453         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5454         .procs                  = nfs4_procedures
5455 };
5456
5457 /*
5458  * Local variables:
5459  *  c-basic-offset: 8
5460  * End:
5461  */