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