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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/errno.h>
  43 #include <linux/string.h>
  44 #include <linux/in.h>
  45 #include <linux/pagemap.h>
  46 #include <linux/proc_fs.h>
  47 #include <linux/kdev_t.h>
  48 #include <linux/sunrpc/clnt.h>
  49 #include <linux/nfs.h>
  50 #include <linux/nfs4.h>
  51 #include <linux/nfs_fs.h>
  52 #include <linux/nfs_idmap.h>
  53 #include "nfs4_fs.h"
  54
  55 #define NFSDBG_FACILITY         NFSDBG_XDR
  56
  57 /* Mapping from NFS error code to "errno" error code. */
  58 #define errno_NFSERR_IO         EIO
  59
  60 static int nfs4_stat_to_errno(int);
  61
  62 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  63 #ifdef DEBUG
  64 #define NFS4_MAXTAGLEN          20
  65 #else
  66 #define NFS4_MAXTAGLEN          0
  67 #endif
  68
  69 /* lock,open owner id:
  70  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  71  */
  72 #define open_owner_id_maxsz     (1 + 4)
  73 #define lock_owner_id_maxsz     (1 + 4)
  74 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  75 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  76 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define op_encode_hdr_maxsz     (1)
  78 #define op_decode_hdr_maxsz     (2)
  79 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  80 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  82 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  84                                 (NFS4_FHSIZE >> 2))
  85 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  86 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  87 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  88 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  89 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  90                                 ((3+NFS4_FHSIZE) >> 2))
  91 #define nfs4_fattr_bitmap_maxsz 3
  92 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  93 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  94 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  95 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  96 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 /* This is based on getfattr, which uses the most attributes: */
  98 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
  99                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 100 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 101                                 nfs4_fattr_value_maxsz)
 102 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 103 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 104                                  1 + 2 + 1 + \
 105                                 nfs4_owner_maxsz + \
 106                                 nfs4_group_maxsz + \
 107                                 4 + 4)
 108 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 109 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 110 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 111 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 112 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 113 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 114 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 115 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 116 #define encode_setclientid_maxsz \
 117                                 (op_encode_hdr_maxsz + \
 118                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 119                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 120                                 1 /* sc_prog */ + \
 121                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 122                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 123                                 1) /* sc_cb_ident */
 124 #define decode_setclientid_maxsz \
 125                                 (op_decode_hdr_maxsz + \
 126                                 2 + \
 127                                 1024) /* large value for CLID_INUSE */
 128 #define encode_setclientid_confirm_maxsz \
 129                                 (op_encode_hdr_maxsz + \
 130                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 131 #define decode_setclientid_confirm_maxsz \
 132                                 (op_decode_hdr_maxsz)
 133 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 134 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 135 #define encode_share_access_maxsz \
 136                                 (2)
 137 #define encode_createmode_maxsz (1 + encode_attrs_maxsz)
 138 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 139 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 140 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 141                                 2 + encode_share_access_maxsz + 2 + \
 142                                 open_owner_id_maxsz + \
 143                                 encode_opentype_maxsz + \
 144                                 encode_claim_null_maxsz)
 145 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 146 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 147                                 decode_ace_maxsz)
 148 #define decode_change_info_maxsz        (5)
 149 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 150                                 decode_stateid_maxsz + \
 151                                 decode_change_info_maxsz + 1 + \
 152                                 nfs4_fattr_bitmap_maxsz + \
 153                                 decode_delegation_maxsz)
 154 #define encode_open_confirm_maxsz \
 155                                 (op_encode_hdr_maxsz + \
 156                                  encode_stateid_maxsz + 1)
 157 #define decode_open_confirm_maxsz \
 158                                 (op_decode_hdr_maxsz + \
 159                                  decode_stateid_maxsz)
 160 #define encode_open_downgrade_maxsz \
 161                                 (op_encode_hdr_maxsz + \
 162                                  encode_stateid_maxsz + 1 + \
 163                                  encode_share_access_maxsz)
 164 #define decode_open_downgrade_maxsz \
 165                                 (op_decode_hdr_maxsz + \
 166                                  decode_stateid_maxsz)
 167 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 168                                  1 + encode_stateid_maxsz)
 169 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 170                                  decode_stateid_maxsz)
 171 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 172                                  encode_stateid_maxsz + \
 173                                  encode_attrs_maxsz)
 174 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 175                                  nfs4_fattr_bitmap_maxsz)
 176 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 177                                  encode_stateid_maxsz + 3)
 178 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 179 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 180                                  2 + encode_verifier_maxsz + 5)
 181 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 182                                  decode_verifier_maxsz)
 183 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 184 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 185 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 186                                  encode_stateid_maxsz + 4)
 187 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 188                                  2 + decode_verifier_maxsz)
 189 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 190 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 191                                  decode_verifier_maxsz)
 192 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 193                                 nfs4_name_maxsz)
 194 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 195                                  decode_change_info_maxsz)
 196 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 197                                 2 * nfs4_name_maxsz)
 198 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 199                                  decode_change_info_maxsz + \
 200                                  decode_change_info_maxsz)
 201 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 202                                 nfs4_name_maxsz)
 203 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 204 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 205                                  7 + \
 206                                  1 + encode_stateid_maxsz + 8)
 207 #define decode_lock_denied_maxsz \
 208                                 (8 + decode_lockowner_maxsz)
 209 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 210                                  decode_lock_denied_maxsz)
 211 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 212 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 213                                  decode_lock_denied_maxsz)
 214 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 215                                  encode_stateid_maxsz + \
 216                                  4)
 217 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 218                                  decode_stateid_maxsz)
 219 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 220 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 221 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 222                                 1 + nfs4_name_maxsz + \
 223                                 1 + \
 224                                 nfs4_fattr_maxsz)
 225 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 226 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 227                                 1 + 2 + nfs4_name_maxsz + \
 228                                 encode_attrs_maxsz)
 229 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 230                                 decode_change_info_maxsz + \
 231                                 nfs4_fattr_bitmap_maxsz)
 232 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 233 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 234 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 235 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 236 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 237 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 238                                  nfs4_fattr_bitmap_maxsz + 1)
 239 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 240                                  encode_stateid_maxsz + 3)
 241 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 242 #define encode_fs_locations_maxsz \
 243                                 (encode_getattr_maxsz)
 244 #define decode_fs_locations_maxsz \
 245                                 (0)
 246
 247 #if defined(CONFIG_NFS_V4_1)
 248 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 249
 250 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 251                                 encode_verifier_maxsz + \
 252                                 1 /* co_ownerid.len */ + \
 253                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 254                                 1 /* flags */ + \
 255                                 1 /* spa_how */ + \
 256                                 0 /* SP4_NONE (for now) */ + \
 257                                 1 /* zero implemetation id array */)
 258 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 259                                 2 /* eir_clientid */ + \
 260                                 1 /* eir_sequenceid */ + \
 261                                 1 /* eir_flags */ + \
 262                                 1 /* spr_how */ + \
 263                                 0 /* SP4_NONE (for now) */ + \
 264                                 2 /* eir_server_owner.so_minor_id */ + \
 265                                 /* eir_server_owner.so_major_id<> */ \
 266                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 267                                 /* eir_server_scope<> */ \
 268                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 269                                 1 /* eir_server_impl_id array length */ + \
 270                                 0 /* ignored eir_server_impl_id contents */)
 271 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 272 #define decode_channel_attrs_maxsz  (6 + \
 273                                      1 /* ca_rdma_ird.len */ + \
 274                                      1 /* ca_rdma_ird */)
 275 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 276                                      2 /* csa_clientid */ + \
 277                                      1 /* csa_sequence */ + \
 278                                      1 /* csa_flags */ + \
 279                                      encode_channel_attrs_maxsz + \
 280                                      encode_channel_attrs_maxsz + \
 281                                      1 /* csa_cb_program */ + \
 282                                      1 /* csa_sec_parms.len (1) */ + \
 283                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 284                                      1 /* stamp */ + \
 285                                      1 /* machinename.len */ + \
 286                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 287                                      1 /* uid */ + \
 288                                      1 /* gid */ + \
 289                                      1 /* gids.len (0) */)
 290 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 291                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 292                                      1 /* csr_sequence */ + \
 293                                      1 /* csr_flags */ + \
 294                                      decode_channel_attrs_maxsz + \
 295                                      decode_channel_attrs_maxsz)
 296 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 297 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 298 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 299                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 300 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 301                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 302 #else /* CONFIG_NFS_V4_1 */
 303 #define encode_sequence_maxsz   0
 304 #define decode_sequence_maxsz   0
 305 #endif /* CONFIG_NFS_V4_1 */
 306
 307 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 308 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 309 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 310                                 encode_sequence_maxsz + \
 311                                 encode_putfh_maxsz + \
 312                                 encode_read_maxsz)
 313 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 314                                 decode_sequence_maxsz + \
 315                                 decode_putfh_maxsz + \
 316                                 decode_read_maxsz)
 317 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 318                                 encode_sequence_maxsz + \
 319                                 encode_putfh_maxsz + \
 320                                 encode_readlink_maxsz)
 321 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 322                                 decode_sequence_maxsz + \
 323                                 decode_putfh_maxsz + \
 324                                 decode_readlink_maxsz)
 325 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 326                                 encode_sequence_maxsz + \
 327                                 encode_putfh_maxsz + \
 328                                 encode_readdir_maxsz)
 329 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 330                                 decode_sequence_maxsz + \
 331                                 decode_putfh_maxsz + \
 332                                 decode_readdir_maxsz)
 333 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 334                                 encode_sequence_maxsz + \
 335                                 encode_putfh_maxsz + \
 336                                 encode_write_maxsz + \
 337                                 encode_getattr_maxsz)
 338 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 339                                 decode_sequence_maxsz + \
 340                                 decode_putfh_maxsz + \
 341                                 decode_write_maxsz + \
 342                                 decode_getattr_maxsz)
 343 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 344                                 encode_sequence_maxsz + \
 345                                 encode_putfh_maxsz + \
 346                                 encode_commit_maxsz + \
 347                                 encode_getattr_maxsz)
 348 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 349                                 decode_sequence_maxsz + \
 350                                 decode_putfh_maxsz + \
 351                                 decode_commit_maxsz + \
 352                                 decode_getattr_maxsz)
 353 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 354                                 encode_sequence_maxsz + \
 355                                 encode_putfh_maxsz + \
 356                                 encode_savefh_maxsz + \
 357                                 encode_open_maxsz + \
 358                                 encode_getfh_maxsz + \
 359                                 encode_getattr_maxsz + \
 360                                 encode_restorefh_maxsz + \
 361                                 encode_getattr_maxsz)
 362 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 363                                 decode_sequence_maxsz + \
 364                                 decode_putfh_maxsz + \
 365                                 decode_savefh_maxsz + \
 366                                 decode_open_maxsz + \
 367                                 decode_getfh_maxsz + \
 368                                 decode_getattr_maxsz + \
 369                                 decode_restorefh_maxsz + \
 370                                 decode_getattr_maxsz)
 371 #define NFS4_enc_open_confirm_sz \
 372                                 (compound_encode_hdr_maxsz + \
 373                                  encode_putfh_maxsz + \
 374                                  encode_open_confirm_maxsz)
 375 #define NFS4_dec_open_confirm_sz \
 376                                 (compound_decode_hdr_maxsz + \
 377                                  decode_putfh_maxsz + \
 378                                  decode_open_confirm_maxsz)
 379 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 380                                         encode_sequence_maxsz + \
 381                                         encode_putfh_maxsz + \
 382                                         encode_open_maxsz + \
 383                                         encode_getattr_maxsz)
 384 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 385                                         decode_sequence_maxsz + \
 386                                         decode_putfh_maxsz + \
 387                                         decode_open_maxsz + \
 388                                         decode_getattr_maxsz)
 389 #define NFS4_enc_open_downgrade_sz \
 390                                 (compound_encode_hdr_maxsz + \
 391                                  encode_sequence_maxsz + \
 392                                  encode_putfh_maxsz + \
 393                                  encode_open_downgrade_maxsz + \
 394                                  encode_getattr_maxsz)
 395 #define NFS4_dec_open_downgrade_sz \
 396                                 (compound_decode_hdr_maxsz + \
 397                                  decode_sequence_maxsz + \
 398                                  decode_putfh_maxsz + \
 399                                  decode_open_downgrade_maxsz + \
 400                                  decode_getattr_maxsz)
 401 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 402                                  encode_sequence_maxsz + \
 403                                  encode_putfh_maxsz + \
 404                                  encode_close_maxsz + \
 405                                  encode_getattr_maxsz)
 406 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 407                                  decode_sequence_maxsz + \
 408                                  decode_putfh_maxsz + \
 409                                  decode_close_maxsz + \
 410                                  decode_getattr_maxsz)
 411 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 412                                  encode_sequence_maxsz + \
 413                                  encode_putfh_maxsz + \
 414                                  encode_setattr_maxsz + \
 415                                  encode_getattr_maxsz)
 416 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 417                                  decode_sequence_maxsz + \
 418                                  decode_putfh_maxsz + \
 419                                  decode_setattr_maxsz + \
 420                                  decode_getattr_maxsz)
 421 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 422                                 encode_sequence_maxsz + \
 423                                 encode_putfh_maxsz + \
 424                                 encode_fsinfo_maxsz)
 425 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 426                                 decode_sequence_maxsz + \
 427                                 decode_putfh_maxsz + \
 428                                 decode_fsinfo_maxsz)
 429 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 430                                 encode_renew_maxsz)
 431 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 432                                 decode_renew_maxsz)
 433 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 434                                 encode_setclientid_maxsz)
 435 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 436                                 decode_setclientid_maxsz)
 437 #define NFS4_enc_setclientid_confirm_sz \
 438                                 (compound_encode_hdr_maxsz + \
 439                                 encode_setclientid_confirm_maxsz + \
 440                                 encode_putrootfh_maxsz + \
 441                                 encode_fsinfo_maxsz)
 442 #define NFS4_dec_setclientid_confirm_sz \
 443                                 (compound_decode_hdr_maxsz + \
 444                                 decode_setclientid_confirm_maxsz + \
 445                                 decode_putrootfh_maxsz + \
 446                                 decode_fsinfo_maxsz)
 447 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 448                                 encode_sequence_maxsz + \
 449                                 encode_putfh_maxsz + \
 450                                 encode_lock_maxsz)
 451 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 452                                 decode_sequence_maxsz + \
 453                                 decode_putfh_maxsz + \
 454                                 decode_lock_maxsz)
 455 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 456                                 encode_sequence_maxsz + \
 457                                 encode_putfh_maxsz + \
 458                                 encode_lockt_maxsz)
 459 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 460                                  decode_sequence_maxsz + \
 461                                  decode_putfh_maxsz + \
 462                                  decode_lockt_maxsz)
 463 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 464                                 encode_sequence_maxsz + \
 465                                 encode_putfh_maxsz + \
 466                                 encode_locku_maxsz)
 467 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 468                                 decode_sequence_maxsz + \
 469                                 decode_putfh_maxsz + \
 470                                 decode_locku_maxsz)
 471 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 472                                 encode_sequence_maxsz + \
 473                                 encode_putfh_maxsz + \
 474                                 encode_access_maxsz + \
 475                                 encode_getattr_maxsz)
 476 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putfh_maxsz + \
 479                                 decode_access_maxsz + \
 480                                 decode_getattr_maxsz)
 481 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 482                                 encode_sequence_maxsz + \
 483                                 encode_putfh_maxsz + \
 484                                 encode_getattr_maxsz)
 485 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 486                                 decode_sequence_maxsz + \
 487                                 decode_putfh_maxsz + \
 488                                 decode_getattr_maxsz)
 489 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 490                                 encode_sequence_maxsz + \
 491                                 encode_putfh_maxsz + \
 492                                 encode_lookup_maxsz + \
 493                                 encode_getattr_maxsz + \
 494                                 encode_getfh_maxsz)
 495 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 496                                 decode_sequence_maxsz + \
 497                                 decode_putfh_maxsz + \
 498                                 decode_lookup_maxsz + \
 499                                 decode_getattr_maxsz + \
 500                                 decode_getfh_maxsz)
 501 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 502                                 encode_sequence_maxsz + \
 503                                 encode_putrootfh_maxsz + \
 504                                 encode_getattr_maxsz + \
 505                                 encode_getfh_maxsz)
 506 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 507                                 decode_sequence_maxsz + \
 508                                 decode_putrootfh_maxsz + \
 509                                 decode_getattr_maxsz + \
 510                                 decode_getfh_maxsz)
 511 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 512                                 encode_sequence_maxsz + \
 513                                 encode_putfh_maxsz + \
 514                                 encode_remove_maxsz + \
 515                                 encode_getattr_maxsz)
 516 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 517                                 decode_sequence_maxsz + \
 518                                 decode_putfh_maxsz + \
 519                                 decode_remove_maxsz + \
 520                                 decode_getattr_maxsz)
 521 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 522                                 encode_sequence_maxsz + \
 523                                 encode_putfh_maxsz + \
 524                                 encode_savefh_maxsz + \
 525                                 encode_putfh_maxsz + \
 526                                 encode_rename_maxsz + \
 527                                 encode_getattr_maxsz + \
 528                                 encode_restorefh_maxsz + \
 529                                 encode_getattr_maxsz)
 530 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 531                                 decode_sequence_maxsz + \
 532                                 decode_putfh_maxsz + \
 533                                 decode_savefh_maxsz + \
 534                                 decode_putfh_maxsz + \
 535                                 decode_rename_maxsz + \
 536                                 decode_getattr_maxsz + \
 537                                 decode_restorefh_maxsz + \
 538                                 decode_getattr_maxsz)
 539 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 540                                 encode_sequence_maxsz + \
 541                                 encode_putfh_maxsz + \
 542                                 encode_savefh_maxsz + \
 543                                 encode_putfh_maxsz + \
 544                                 encode_link_maxsz + \
 545                                 decode_getattr_maxsz + \
 546                                 encode_restorefh_maxsz + \
 547                                 decode_getattr_maxsz)
 548 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 549                                 decode_sequence_maxsz + \
 550                                 decode_putfh_maxsz + \
 551                                 decode_savefh_maxsz + \
 552                                 decode_putfh_maxsz + \
 553                                 decode_link_maxsz + \
 554                                 decode_getattr_maxsz + \
 555                                 decode_restorefh_maxsz + \
 556                                 decode_getattr_maxsz)
 557 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_symlink_maxsz + \
 561                                 encode_getattr_maxsz + \
 562                                 encode_getfh_maxsz)
 563 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 564                                 decode_sequence_maxsz + \
 565                                 decode_putfh_maxsz + \
 566                                 decode_symlink_maxsz + \
 567                                 decode_getattr_maxsz + \
 568                                 decode_getfh_maxsz)
 569 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 570                                 encode_sequence_maxsz + \
 571                                 encode_putfh_maxsz + \
 572                                 encode_savefh_maxsz + \
 573                                 encode_create_maxsz + \
 574                                 encode_getfh_maxsz + \
 575                                 encode_getattr_maxsz + \
 576                                 encode_restorefh_maxsz + \
 577                                 encode_getattr_maxsz)
 578 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 579                                 decode_sequence_maxsz + \
 580                                 decode_putfh_maxsz + \
 581                                 decode_savefh_maxsz + \
 582                                 decode_create_maxsz + \
 583                                 decode_getfh_maxsz + \
 584                                 decode_getattr_maxsz + \
 585                                 decode_restorefh_maxsz + \
 586                                 decode_getattr_maxsz)
 587 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 588                                 encode_sequence_maxsz + \
 589                                 encode_putfh_maxsz + \
 590                                 encode_getattr_maxsz)
 591 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 592                                 decode_sequence_maxsz + \
 593                                 decode_putfh_maxsz + \
 594                                 decode_getattr_maxsz)
 595 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 596                                 encode_sequence_maxsz + \
 597                                 encode_putfh_maxsz + \
 598                                 encode_statfs_maxsz)
 599 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 600                                 decode_sequence_maxsz + \
 601                                 decode_putfh_maxsz + \
 602                                 decode_statfs_maxsz)
 603 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 604                                 encode_sequence_maxsz + \
 605                                 encode_putfh_maxsz + \
 606                                 encode_getattr_maxsz)
 607 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 608                                 decode_sequence_maxsz + \
 609                                 decode_putfh_maxsz + \
 610                                 decode_getattr_maxsz)
 611 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 612                                 encode_sequence_maxsz + \
 613                                 encode_putfh_maxsz + \
 614                                 encode_delegreturn_maxsz + \
 615                                 encode_getattr_maxsz)
 616 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_delegreturn_maxsz + \
 619                                 decode_getattr_maxsz)
 620 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 621                                 encode_sequence_maxsz + \
 622                                 encode_putfh_maxsz + \
 623                                 encode_getacl_maxsz)
 624 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_getacl_maxsz)
 628 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 629                                 encode_sequence_maxsz + \
 630                                 encode_putfh_maxsz + \
 631                                 encode_setacl_maxsz)
 632 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 633                                 decode_sequence_maxsz + \
 634                                 decode_putfh_maxsz + \
 635                                 decode_setacl_maxsz)
 636 #define NFS4_enc_fs_locations_sz \
 637                                 (compound_encode_hdr_maxsz + \
 638                                  encode_sequence_maxsz + \
 639                                  encode_putfh_maxsz + \
 640                                  encode_lookup_maxsz + \
 641                                  encode_fs_locations_maxsz)
 642 #define NFS4_dec_fs_locations_sz \
 643                                 (compound_decode_hdr_maxsz + \
 644                                  decode_sequence_maxsz + \
 645                                  decode_putfh_maxsz + \
 646                                  decode_lookup_maxsz + \
 647                                  decode_fs_locations_maxsz)
 648 #if defined(CONFIG_NFS_V4_1)
 649 #define NFS4_enc_exchange_id_sz \
 650                                 (compound_encode_hdr_maxsz + \
 651                                  encode_exchange_id_maxsz)
 652 #define NFS4_dec_exchange_id_sz \
 653                                 (compound_decode_hdr_maxsz + \
 654                                  decode_exchange_id_maxsz)
 655 #define NFS4_enc_create_session_sz \
 656                                 (compound_encode_hdr_maxsz + \
 657                                  encode_create_session_maxsz)
 658 #define NFS4_dec_create_session_sz \
 659                                 (compound_decode_hdr_maxsz + \
 660                                  decode_create_session_maxsz)
 661 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 662                                          encode_destroy_session_maxsz)
 663 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 664                                          decode_destroy_session_maxsz)
 665 #define NFS4_enc_sequence_sz \
 666                                 (compound_decode_hdr_maxsz + \
 667                                  encode_sequence_maxsz)
 668 #define NFS4_dec_sequence_sz \
 669                                 (compound_decode_hdr_maxsz + \
 670                                  decode_sequence_maxsz)
 671 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 672                                          encode_sequence_maxsz + \
 673                                          encode_putrootfh_maxsz + \
 674                                          encode_fsinfo_maxsz)
 675 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 676                                          decode_sequence_maxsz + \
 677                                          decode_putrootfh_maxsz + \
 678                                          decode_fsinfo_maxsz)
 679 #endif /* CONFIG_NFS_V4_1 */
 680
 681 static const umode_t nfs_type2fmt[] = {
 682         [NF4BAD] = 0,
 683         [NF4REG] = S_IFREG,
 684         [NF4DIR] = S_IFDIR,
 685         [NF4BLK] = S_IFBLK,
 686         [NF4CHR] = S_IFCHR,
 687         [NF4LNK] = S_IFLNK,
 688         [NF4SOCK] = S_IFSOCK,
 689         [NF4FIFO] = S_IFIFO,
 690         [NF4ATTRDIR] = 0,
 691         [NF4NAMEDATTR] = 0,
 692 };
 693
 694 struct compound_hdr {
 695         int32_t         status;
 696         uint32_t        nops;
 697         __be32 *        nops_p;
 698         uint32_t        taglen;
 699         char *          tag;
 700         uint32_t        replen;         /* expected reply words */
 701         u32             minorversion;
 702 };
 703
 704 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 705 {
 706         __be32 *p = xdr_reserve_space(xdr, nbytes);
 707         BUG_ON(!p);
 708         return p;
 709 }
 710
 711 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 712 {
 713         __be32 *p;
 714
 715         p = xdr_reserve_space(xdr, 4 + len);
 716         BUG_ON(p == NULL);
 717         xdr_encode_opaque(p, str, len);
 718 }
 719
 720 static void encode_compound_hdr(struct xdr_stream *xdr,
 721                                 struct rpc_rqst *req,
 722                                 struct compound_hdr *hdr)
 723 {
 724         __be32 *p;
 725         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 726
 727         /* initialize running count of expected bytes in reply.
 728          * NOTE: the replied tag SHOULD be the same is the one sent,
 729          * but this is not required as a MUST for the server to do so. */
 730         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 731
 732         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 733         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 734         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 735         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 736         *p++ = cpu_to_be32(hdr->minorversion);
 737         hdr->nops_p = p;
 738         *p = cpu_to_be32(hdr->nops);
 739 }
 740
 741 static void encode_nops(struct compound_hdr *hdr)
 742 {
 743         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 744         *hdr->nops_p = htonl(hdr->nops);
 745 }
 746
 747 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 748 {
 749         __be32 *p;
 750
 751         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 752         BUG_ON(p == NULL);
 753         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 754 }
 755
 756 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 757 {
 758         char owner_name[IDMAP_NAMESZ];
 759         char owner_group[IDMAP_NAMESZ];
 760         int owner_namelen = 0;
 761         int owner_grouplen = 0;
 762         __be32 *p;
 763         __be32 *q;
 764         int len;
 765         uint32_t bmval0 = 0;
 766         uint32_t bmval1 = 0;
 767
 768         /*
 769          * We reserve enough space to write the entire attribute buffer at once.
 770          * In the worst-case, this would be
 771          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 772          *          = 36 bytes, plus any contribution from variable-length fields
 773          *            such as owner/group.
 774          */
 775         len = 16;
 776
 777         /* Sigh */
 778         if (iap->ia_valid & ATTR_SIZE)
 779                 len += 8;
 780         if (iap->ia_valid & ATTR_MODE)
 781                 len += 4;
 782         if (iap->ia_valid & ATTR_UID) {
 783                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 784                 if (owner_namelen < 0) {
 785                         dprintk("nfs: couldn't resolve uid %d to string\n",
 786                                         iap->ia_uid);
 787                         /* XXX */
 788                         strcpy(owner_name, "nobody");
 789                         owner_namelen = sizeof("nobody") - 1;
 790                         /* goto out; */
 791                 }
 792                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 793         }
 794         if (iap->ia_valid & ATTR_GID) {
 795                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 796                 if (owner_grouplen < 0) {
 797                         dprintk("nfs: couldn't resolve gid %d to string\n",
 798                                         iap->ia_gid);
 799                         strcpy(owner_group, "nobody");
 800                         owner_grouplen = sizeof("nobody") - 1;
 801                         /* goto out; */
 802                 }
 803                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 804         }
 805         if (iap->ia_valid & ATTR_ATIME_SET)
 806                 len += 16;
 807         else if (iap->ia_valid & ATTR_ATIME)
 808                 len += 4;
 809         if (iap->ia_valid & ATTR_MTIME_SET)
 810                 len += 16;
 811         else if (iap->ia_valid & ATTR_MTIME)
 812                 len += 4;
 813         p = reserve_space(xdr, len);
 814
 815         /*
 816          * We write the bitmap length now, but leave the bitmap and the attribute
 817          * buffer length to be backfilled at the end of this routine.
 818          */
 819         *p++ = cpu_to_be32(2);
 820         q = p;
 821         p += 3;
 822
 823         if (iap->ia_valid & ATTR_SIZE) {
 824                 bmval0 |= FATTR4_WORD0_SIZE;
 825                 p = xdr_encode_hyper(p, iap->ia_size);
 826         }
 827         if (iap->ia_valid & ATTR_MODE) {
 828                 bmval1 |= FATTR4_WORD1_MODE;
 829                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 830         }
 831         if (iap->ia_valid & ATTR_UID) {
 832                 bmval1 |= FATTR4_WORD1_OWNER;
 833                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 834         }
 835         if (iap->ia_valid & ATTR_GID) {
 836                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 837                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 838         }
 839         if (iap->ia_valid & ATTR_ATIME_SET) {
 840                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 841                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 842                 *p++ = cpu_to_be32(0);
 843                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 844                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 845         }
 846         else if (iap->ia_valid & ATTR_ATIME) {
 847                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 848                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 849         }
 850         if (iap->ia_valid & ATTR_MTIME_SET) {
 851                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 852                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 853                 *p++ = cpu_to_be32(0);
 854                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 855                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 856         }
 857         else if (iap->ia_valid & ATTR_MTIME) {
 858                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 859                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 860         }
 861
 862         /*
 863          * Now we backfill the bitmap and the attribute buffer length.
 864          */
 865         if (len != ((char *)p - (char *)q) + 4) {
 866                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 867                                 len, ((char *)p - (char *)q) + 4);
 868                 BUG();
 869         }
 870         len = (char *)p - (char *)q - 12;
 871         *q++ = htonl(bmval0);
 872         *q++ = htonl(bmval1);
 873         *q = htonl(len);
 874
 875 /* out: */
 876 }
 877
 878 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 879 {
 880         __be32 *p;
 881
 882         p = reserve_space(xdr, 8);
 883         *p++ = cpu_to_be32(OP_ACCESS);
 884         *p = cpu_to_be32(access);
 885         hdr->nops++;
 886         hdr->replen += decode_access_maxsz;
 887 }
 888
 889 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 890 {
 891         __be32 *p;
 892
 893         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 894         *p++ = cpu_to_be32(OP_CLOSE);
 895         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 896         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 897         hdr->nops++;
 898         hdr->replen += decode_close_maxsz;
 899 }
 900
 901 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 902 {
 903         __be32 *p;
 904
 905         p = reserve_space(xdr, 16);
 906         *p++ = cpu_to_be32(OP_COMMIT);
 907         p = xdr_encode_hyper(p, args->offset);
 908         *p = cpu_to_be32(args->count);
 909         hdr->nops++;
 910         hdr->replen += decode_commit_maxsz;
 911 }
 912
 913 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 914 {
 915         __be32 *p;
 916
 917         p = reserve_space(xdr, 8);
 918         *p++ = cpu_to_be32(OP_CREATE);
 919         *p = cpu_to_be32(create->ftype);
 920
 921         switch (create->ftype) {
 922         case NF4LNK:
 923                 p = reserve_space(xdr, 4);
 924                 *p = cpu_to_be32(create->u.symlink.len);
 925                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 926                 break;
 927
 928         case NF4BLK: case NF4CHR:
 929                 p = reserve_space(xdr, 8);
 930                 *p++ = cpu_to_be32(create->u.device.specdata1);
 931                 *p = cpu_to_be32(create->u.device.specdata2);
 932                 break;
 933
 934         default:
 935                 break;
 936         }
 937
 938         encode_string(xdr, create->name->len, create->name->name);
 939         hdr->nops++;
 940         hdr->replen += decode_create_maxsz;
 941
 942         encode_attrs(xdr, create->attrs, create->server);
 943 }
 944
 945 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 946 {
 947         __be32 *p;
 948
 949         p = reserve_space(xdr, 12);
 950         *p++ = cpu_to_be32(OP_GETATTR);
 951         *p++ = cpu_to_be32(1);
 952         *p = cpu_to_be32(bitmap);
 953         hdr->nops++;
 954         hdr->replen += decode_getattr_maxsz;
 955 }
 956
 957 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 958 {
 959         __be32 *p;
 960
 961         p = reserve_space(xdr, 16);
 962         *p++ = cpu_to_be32(OP_GETATTR);
 963         *p++ = cpu_to_be32(2);
 964         *p++ = cpu_to_be32(bm0);
 965         *p = cpu_to_be32(bm1);
 966         hdr->nops++;
 967         hdr->replen += decode_getattr_maxsz;
 968 }
 969
 970 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 971 {
 972         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 973                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 974 }
 975
 976 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 977 {
 978         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 979                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 980 }
 981
 982 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 983 {
 984         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 985                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 986 }
 987
 988 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 989 {
 990         __be32 *p;
 991
 992         p = reserve_space(xdr, 4);
 993         *p = cpu_to_be32(OP_GETFH);
 994         hdr->nops++;
 995         hdr->replen += decode_getfh_maxsz;
 996 }
 997
 998 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 999 {
1000         __be32 *p;
1001
1002         p = reserve_space(xdr, 8 + name->len);
1003         *p++ = cpu_to_be32(OP_LINK);
1004         xdr_encode_opaque(p, name->name, name->len);
1005         hdr->nops++;
1006         hdr->replen += decode_link_maxsz;
1007 }
1008
1009 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1010 {
1011         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1012                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1013         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1014 }
1015
1016 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1017 {
1018         if (fl->fl_end == OFFSET_MAX)
1019                 return ~(uint64_t)0;
1020         return fl->fl_end - fl->fl_start + 1;
1021 }
1022
1023 /*
1024  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1025  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1026  */
1027 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1028 {
1029         __be32 *p;
1030
1031         p = reserve_space(xdr, 32);
1032         *p++ = cpu_to_be32(OP_LOCK);
1033         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1034         *p++ = cpu_to_be32(args->reclaim);
1035         p = xdr_encode_hyper(p, args->fl->fl_start);
1036         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1037         *p = cpu_to_be32(args->new_lock_owner);
1038         if (args->new_lock_owner){
1039                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1040                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1041                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1042                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1043                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1044                 *p++ = cpu_to_be32(16);
1045                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1046                 xdr_encode_hyper(p, args->lock_owner.id);
1047         }
1048         else {
1049                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1050                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1051                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1052         }
1053         hdr->nops++;
1054         hdr->replen += decode_lock_maxsz;
1055 }
1056
1057 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1058 {
1059         __be32 *p;
1060
1061         p = reserve_space(xdr, 52);
1062         *p++ = cpu_to_be32(OP_LOCKT);
1063         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1064         p = xdr_encode_hyper(p, args->fl->fl_start);
1065         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1066         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1067         *p++ = cpu_to_be32(16);
1068         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1069         xdr_encode_hyper(p, args->lock_owner.id);
1070         hdr->nops++;
1071         hdr->replen += decode_lockt_maxsz;
1072 }
1073
1074 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1075 {
1076         __be32 *p;
1077
1078         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1079         *p++ = cpu_to_be32(OP_LOCKU);
1080         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1081         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1082         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1083         p = xdr_encode_hyper(p, args->fl->fl_start);
1084         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1085         hdr->nops++;
1086         hdr->replen += decode_locku_maxsz;
1087 }
1088
1089 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1090 {
1091         int len = name->len;
1092         __be32 *p;
1093
1094         p = reserve_space(xdr, 8 + len);
1095         *p++ = cpu_to_be32(OP_LOOKUP);
1096         xdr_encode_opaque(p, name->name, len);
1097         hdr->nops++;
1098         hdr->replen += decode_lookup_maxsz;
1099 }
1100
1101 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1102 {
1103         __be32 *p;
1104
1105         p = reserve_space(xdr, 8);
1106         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1107         case FMODE_READ:
1108                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1109                 break;
1110         case FMODE_WRITE:
1111                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1112                 break;
1113         case FMODE_READ|FMODE_WRITE:
1114                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1115                 break;
1116         default:
1117                 *p++ = cpu_to_be32(0);
1118         }
1119         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1120 }
1121
1122 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1123 {
1124         __be32 *p;
1125  /*
1126  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1127  * owner 4 = 32
1128  */
1129         p = reserve_space(xdr, 8);
1130         *p++ = cpu_to_be32(OP_OPEN);
1131         *p = cpu_to_be32(arg->seqid->sequence->counter);
1132         encode_share_access(xdr, arg->fmode);
1133         p = reserve_space(xdr, 28);
1134         p = xdr_encode_hyper(p, arg->clientid);
1135         *p++ = cpu_to_be32(16);
1136         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1137         xdr_encode_hyper(p, arg->id);
1138 }
1139
1140 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1141 {
1142         __be32 *p;
1143
1144         p = reserve_space(xdr, 4);
1145         switch(arg->open_flags & O_EXCL) {
1146         case 0:
1147                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1148                 encode_attrs(xdr, arg->u.attrs, arg->server);
1149                 break;
1150         default:
1151                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1152                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1153         }
1154 }
1155
1156 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1157 {
1158         __be32 *p;
1159
1160         p = reserve_space(xdr, 4);
1161         switch (arg->open_flags & O_CREAT) {
1162         case 0:
1163                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1164                 break;
1165         default:
1166                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1167                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1168                 encode_createmode(xdr, arg);
1169         }
1170 }
1171
1172 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1173 {
1174         __be32 *p;
1175
1176         p = reserve_space(xdr, 4);
1177         switch (delegation_type) {
1178         case 0:
1179                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1180                 break;
1181         case FMODE_READ:
1182                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1183                 break;
1184         case FMODE_WRITE|FMODE_READ:
1185                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1186                 break;
1187         default:
1188                 BUG();
1189         }
1190 }
1191
1192 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1193 {
1194         __be32 *p;
1195
1196         p = reserve_space(xdr, 4);
1197         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1198         encode_string(xdr, name->len, name->name);
1199 }
1200
1201 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1202 {
1203         __be32 *p;
1204
1205         p = reserve_space(xdr, 4);
1206         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1207         encode_delegation_type(xdr, type);
1208 }
1209
1210 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1211 {
1212         __be32 *p;
1213
1214         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1215         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1216         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1217         encode_string(xdr, name->len, name->name);
1218 }
1219
1220 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1221 {
1222         encode_openhdr(xdr, arg);
1223         encode_opentype(xdr, arg);
1224         switch (arg->claim) {
1225         case NFS4_OPEN_CLAIM_NULL:
1226                 encode_claim_null(xdr, arg->name);
1227                 break;
1228         case NFS4_OPEN_CLAIM_PREVIOUS:
1229                 encode_claim_previous(xdr, arg->u.delegation_type);
1230                 break;
1231         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1232                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1233                 break;
1234         default:
1235                 BUG();
1236         }
1237         hdr->nops++;
1238         hdr->replen += decode_open_maxsz;
1239 }
1240
1241 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1242 {
1243         __be32 *p;
1244
1245         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1246         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1247         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1248         *p = cpu_to_be32(arg->seqid->sequence->counter);
1249         hdr->nops++;
1250         hdr->replen += decode_open_confirm_maxsz;
1251 }
1252
1253 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1254 {
1255         __be32 *p;
1256
1257         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1258         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1259         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1260         *p = cpu_to_be32(arg->seqid->sequence->counter);
1261         encode_share_access(xdr, arg->fmode);
1262         hdr->nops++;
1263         hdr->replen += decode_open_downgrade_maxsz;
1264 }
1265
1266 static void
1267 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1268 {
1269         int len = fh->size;
1270         __be32 *p;
1271
1272         p = reserve_space(xdr, 8 + len);
1273         *p++ = cpu_to_be32(OP_PUTFH);
1274         xdr_encode_opaque(p, fh->data, len);
1275         hdr->nops++;
1276         hdr->replen += decode_putfh_maxsz;
1277 }
1278
1279 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1280 {
1281         __be32 *p;
1282
1283         p = reserve_space(xdr, 4);
1284         *p = cpu_to_be32(OP_PUTROOTFH);
1285         hdr->nops++;
1286         hdr->replen += decode_putrootfh_maxsz;
1287 }
1288
1289 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1290 {
1291         nfs4_stateid stateid;
1292         __be32 *p;
1293
1294         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1295         if (ctx->state != NULL) {
1296                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1297                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1298         } else
1299                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1300 }
1301
1302 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1303 {
1304         __be32 *p;
1305
1306         p = reserve_space(xdr, 4);
1307         *p = cpu_to_be32(OP_READ);
1308
1309         encode_stateid(xdr, args->context);
1310
1311         p = reserve_space(xdr, 12);
1312         p = xdr_encode_hyper(p, args->offset);
1313         *p = cpu_to_be32(args->count);
1314         hdr->nops++;
1315         hdr->replen += decode_read_maxsz;
1316 }
1317
1318 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1319 {
1320         uint32_t attrs[2] = {
1321                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1322                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1323         };
1324         __be32 *p;
1325
1326         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1327         *p++ = cpu_to_be32(OP_READDIR);
1328         p = xdr_encode_hyper(p, readdir->cookie);
1329         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1330         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1331         *p++ = cpu_to_be32(readdir->count);
1332         *p++ = cpu_to_be32(2);
1333         /* Switch to mounted_on_fileid if the server supports it */
1334         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1335                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1336         else
1337                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1338         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1339         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1340         hdr->nops++;
1341         hdr->replen += decode_readdir_maxsz;
1342         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1343                         __func__,
1344                         (unsigned long long)readdir->cookie,
1345                         ((u32 *)readdir->verifier.data)[0],
1346                         ((u32 *)readdir->verifier.data)[1],
1347                         attrs[0] & readdir->bitmask[0],
1348                         attrs[1] & readdir->bitmask[1]);
1349 }
1350
1351 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1352 {
1353         __be32 *p;
1354
1355         p = reserve_space(xdr, 4);
1356         *p = cpu_to_be32(OP_READLINK);
1357         hdr->nops++;
1358         hdr->replen += decode_readlink_maxsz;
1359 }
1360
1361 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1362 {
1363         __be32 *p;
1364
1365         p = reserve_space(xdr, 8 + name->len);
1366         *p++ = cpu_to_be32(OP_REMOVE);
1367         xdr_encode_opaque(p, name->name, name->len);
1368         hdr->nops++;
1369         hdr->replen += decode_remove_maxsz;
1370 }
1371
1372 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1373 {
1374         __be32 *p;
1375
1376         p = reserve_space(xdr, 4);
1377         *p = cpu_to_be32(OP_RENAME);
1378         encode_string(xdr, oldname->len, oldname->name);
1379         encode_string(xdr, newname->len, newname->name);
1380         hdr->nops++;
1381         hdr->replen += decode_rename_maxsz;
1382 }
1383
1384 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1385 {
1386         __be32 *p;
1387
1388         p = reserve_space(xdr, 12);
1389         *p++ = cpu_to_be32(OP_RENEW);
1390         xdr_encode_hyper(p, client_stateid->cl_clientid);
1391         hdr->nops++;
1392         hdr->replen += decode_renew_maxsz;
1393 }
1394
1395 static void
1396 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1397 {
1398         __be32 *p;
1399
1400         p = reserve_space(xdr, 4);
1401         *p = cpu_to_be32(OP_RESTOREFH);
1402         hdr->nops++;
1403         hdr->replen += decode_restorefh_maxsz;
1404 }
1405
1406 static int
1407 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1408 {
1409         __be32 *p;
1410
1411         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1412         *p++ = cpu_to_be32(OP_SETATTR);
1413         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1414         p = reserve_space(xdr, 2*4);
1415         *p++ = cpu_to_be32(1);
1416         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1417         if (arg->acl_len % 4)
1418                 return -EINVAL;
1419         p = reserve_space(xdr, 4);
1420         *p = cpu_to_be32(arg->acl_len);
1421         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1422         hdr->nops++;
1423         hdr->replen += decode_setacl_maxsz;
1424         return 0;
1425 }
1426
1427 static void
1428 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1429 {
1430         __be32 *p;
1431
1432         p = reserve_space(xdr, 4);
1433         *p = cpu_to_be32(OP_SAVEFH);
1434         hdr->nops++;
1435         hdr->replen += decode_savefh_maxsz;
1436 }
1437
1438 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1439 {
1440         __be32 *p;
1441
1442         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1443         *p++ = cpu_to_be32(OP_SETATTR);
1444         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1445         hdr->nops++;
1446         hdr->replen += decode_setattr_maxsz;
1447         encode_attrs(xdr, arg->iap, server);
1448 }
1449
1450 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1451 {
1452         __be32 *p;
1453
1454         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1455         *p++ = cpu_to_be32(OP_SETCLIENTID);
1456         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1457
1458         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1459         p = reserve_space(xdr, 4);
1460         *p = cpu_to_be32(setclientid->sc_prog);
1461         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1462         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1463         p = reserve_space(xdr, 4);
1464         *p = cpu_to_be32(setclientid->sc_cb_ident);
1465         hdr->nops++;
1466         hdr->replen += decode_setclientid_maxsz;
1467 }
1468
1469 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1470 {
1471         __be32 *p;
1472
1473         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1474         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1475         p = xdr_encode_hyper(p, client_state->cl_clientid);
1476         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1477         hdr->nops++;
1478         hdr->replen += decode_setclientid_confirm_maxsz;
1479 }
1480
1481 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1482 {
1483         __be32 *p;
1484
1485         p = reserve_space(xdr, 4);
1486         *p = cpu_to_be32(OP_WRITE);
1487
1488         encode_stateid(xdr, args->context);
1489
1490         p = reserve_space(xdr, 16);
1491         p = xdr_encode_hyper(p, args->offset);
1492         *p++ = cpu_to_be32(args->stable);
1493         *p = cpu_to_be32(args->count);
1494
1495         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1496         hdr->nops++;
1497         hdr->replen += decode_write_maxsz;
1498 }
1499
1500 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1501 {
1502         __be32 *p;
1503
1504         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1505
1506         *p++ = cpu_to_be32(OP_DELEGRETURN);
1507         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1508         hdr->nops++;
1509         hdr->replen += decode_delegreturn_maxsz;
1510 }
1511
1512 #if defined(CONFIG_NFS_V4_1)
1513 /* NFSv4.1 operations */
1514 static void encode_exchange_id(struct xdr_stream *xdr,
1515                                struct nfs41_exchange_id_args *args,
1516                                struct compound_hdr *hdr)
1517 {
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1521         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1522         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1523
1524         encode_string(xdr, args->id_len, args->id);
1525
1526         p = reserve_space(xdr, 12);
1527         *p++ = cpu_to_be32(args->flags);
1528         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1529         *p = cpu_to_be32(0);    /* zero length implementation id array */
1530         hdr->nops++;
1531         hdr->replen += decode_exchange_id_maxsz;
1532 }
1533
1534 static void encode_create_session(struct xdr_stream *xdr,
1535                                   struct nfs41_create_session_args *args,
1536                                   struct compound_hdr *hdr)
1537 {
1538         __be32 *p;
1539         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1540         uint32_t len;
1541         struct nfs_client *clp = args->client;
1542
1543         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1544                         clp->cl_ipaddr);
1545
1546         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1547         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1548         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1549         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1550         *p++ = cpu_to_be32(args->flags);                        /*flags */
1551
1552         /* Fore Channel */
1553         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1554         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1555         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1556         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1557         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1558         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1559         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1560
1561         /* Back Channel */
1562         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1563         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1564         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1565         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1566         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1567         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1568         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1569
1570         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1571         *p++ = cpu_to_be32(1);
1572         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1573
1574         /* authsys_parms rfc1831 */
1575         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1576         p = xdr_encode_opaque(p, machine_name, len);
1577         *p++ = cpu_to_be32(0);                          /* UID */
1578         *p++ = cpu_to_be32(0);                          /* GID */
1579         *p = cpu_to_be32(0);                            /* No more gids */
1580         hdr->nops++;
1581         hdr->replen += decode_create_session_maxsz;
1582 }
1583
1584 static void encode_destroy_session(struct xdr_stream *xdr,
1585                                    struct nfs4_session *session,
1586                                    struct compound_hdr *hdr)
1587 {
1588         __be32 *p;
1589         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1590         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1591         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1592         hdr->nops++;
1593         hdr->replen += decode_destroy_session_maxsz;
1594 }
1595 #endif /* CONFIG_NFS_V4_1 */
1596
1597 static void encode_sequence(struct xdr_stream *xdr,
1598                             const struct nfs4_sequence_args *args,
1599                             struct compound_hdr *hdr)
1600 {
1601 #if defined(CONFIG_NFS_V4_1)
1602         struct nfs4_session *session = args->sa_session;
1603         struct nfs4_slot_table *tp;
1604         struct nfs4_slot *slot;
1605         __be32 *p;
1606
1607         if (!session)
1608                 return;
1609
1610         tp = &session->fc_slot_table;
1611
1612         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1613         slot = tp->slots + args->sa_slotid;
1614
1615         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1616         *p++ = cpu_to_be32(OP_SEQUENCE);
1617
1618         /*
1619          * Sessionid + seqid + slotid + max slotid + cache_this
1620          */
1621         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1622                 "max_slotid=%d cache_this=%d\n",
1623                 __func__,
1624                 ((u32 *)session->sess_id.data)[0],
1625                 ((u32 *)session->sess_id.data)[1],
1626                 ((u32 *)session->sess_id.data)[2],
1627                 ((u32 *)session->sess_id.data)[3],
1628                 slot->seq_nr, args->sa_slotid,
1629                 tp->highest_used_slotid, args->sa_cache_this);
1630         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1631         *p++ = cpu_to_be32(slot->seq_nr);
1632         *p++ = cpu_to_be32(args->sa_slotid);
1633         *p++ = cpu_to_be32(tp->highest_used_slotid);
1634         *p = cpu_to_be32(args->sa_cache_this);
1635         hdr->nops++;
1636         hdr->replen += decode_sequence_maxsz;
1637 #endif /* CONFIG_NFS_V4_1 */
1638 }
1639
1640 /*
1641  * END OF "GENERIC" ENCODE ROUTINES.
1642  */
1643
1644 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1645 {
1646 #if defined(CONFIG_NFS_V4_1)
1647         if (args->sa_session)
1648                 return args->sa_session->clp->cl_minorversion;
1649 #endif /* CONFIG_NFS_V4_1 */
1650         return 0;
1651 }
1652
1653 /*
1654  * Encode an ACCESS request
1655  */
1656 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1657 {
1658         struct xdr_stream xdr;
1659         struct compound_hdr hdr = {
1660                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1661         };
1662
1663         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1664         encode_compound_hdr(&xdr, req, &hdr);
1665         encode_sequence(&xdr, &args->seq_args, &hdr);
1666         encode_putfh(&xdr, args->fh, &hdr);
1667         encode_access(&xdr, args->access, &hdr);
1668         encode_getfattr(&xdr, args->bitmask, &hdr);
1669         encode_nops(&hdr);
1670         return 0;
1671 }
1672
1673 /*
1674  * Encode LOOKUP request
1675  */
1676 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1677 {
1678         struct xdr_stream xdr;
1679         struct compound_hdr hdr = {
1680                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1681         };
1682
1683         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1684         encode_compound_hdr(&xdr, req, &hdr);
1685         encode_sequence(&xdr, &args->seq_args, &hdr);
1686         encode_putfh(&xdr, args->dir_fh, &hdr);
1687         encode_lookup(&xdr, args->name, &hdr);
1688         encode_getfh(&xdr, &hdr);
1689         encode_getfattr(&xdr, args->bitmask, &hdr);
1690         encode_nops(&hdr);
1691         return 0;
1692 }
1693
1694 /*
1695  * Encode LOOKUP_ROOT request
1696  */
1697 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1698 {
1699         struct xdr_stream xdr;
1700         struct compound_hdr hdr = {
1701                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1702         };
1703
1704         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1705         encode_compound_hdr(&xdr, req, &hdr);
1706         encode_sequence(&xdr, &args->seq_args, &hdr);
1707         encode_putrootfh(&xdr, &hdr);
1708         encode_getfh(&xdr, &hdr);
1709         encode_getfattr(&xdr, args->bitmask, &hdr);
1710         encode_nops(&hdr);
1711         return 0;
1712 }
1713
1714 /*
1715  * Encode REMOVE request
1716  */
1717 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1718 {
1719         struct xdr_stream xdr;
1720         struct compound_hdr hdr = {
1721                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1722         };
1723
1724         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1725         encode_compound_hdr(&xdr, req, &hdr);
1726         encode_sequence(&xdr, &args->seq_args, &hdr);
1727         encode_putfh(&xdr, args->fh, &hdr);
1728         encode_remove(&xdr, &args->name, &hdr);
1729         encode_getfattr(&xdr, args->bitmask, &hdr);
1730         encode_nops(&hdr);
1731         return 0;
1732 }
1733
1734 /*
1735  * Encode RENAME request
1736  */
1737 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1738 {
1739         struct xdr_stream xdr;
1740         struct compound_hdr hdr = {
1741                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1742         };
1743
1744         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1745         encode_compound_hdr(&xdr, req, &hdr);
1746         encode_sequence(&xdr, &args->seq_args, &hdr);
1747         encode_putfh(&xdr, args->old_dir, &hdr);
1748         encode_savefh(&xdr, &hdr);
1749         encode_putfh(&xdr, args->new_dir, &hdr);
1750         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1751         encode_getfattr(&xdr, args->bitmask, &hdr);
1752         encode_restorefh(&xdr, &hdr);
1753         encode_getfattr(&xdr, args->bitmask, &hdr);
1754         encode_nops(&hdr);
1755         return 0;
1756 }
1757
1758 /*
1759  * Encode LINK request
1760  */
1761 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1762 {
1763         struct xdr_stream xdr;
1764         struct compound_hdr hdr = {
1765                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1766         };
1767
1768         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1769         encode_compound_hdr(&xdr, req, &hdr);
1770         encode_sequence(&xdr, &args->seq_args, &hdr);
1771         encode_putfh(&xdr, args->fh, &hdr);
1772         encode_savefh(&xdr, &hdr);
1773         encode_putfh(&xdr, args->dir_fh, &hdr);
1774         encode_link(&xdr, args->name, &hdr);
1775         encode_getfattr(&xdr, args->bitmask, &hdr);
1776         encode_restorefh(&xdr, &hdr);
1777         encode_getfattr(&xdr, args->bitmask, &hdr);
1778         encode_nops(&hdr);
1779         return 0;
1780 }
1781
1782 /*
1783  * Encode CREATE request
1784  */
1785 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1786 {
1787         struct xdr_stream xdr;
1788         struct compound_hdr hdr = {
1789                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1790         };
1791
1792         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1793         encode_compound_hdr(&xdr, req, &hdr);
1794         encode_sequence(&xdr, &args->seq_args, &hdr);
1795         encode_putfh(&xdr, args->dir_fh, &hdr);
1796         encode_savefh(&xdr, &hdr);
1797         encode_create(&xdr, args, &hdr);
1798         encode_getfh(&xdr, &hdr);
1799         encode_getfattr(&xdr, args->bitmask, &hdr);
1800         encode_restorefh(&xdr, &hdr);
1801         encode_getfattr(&xdr, args->bitmask, &hdr);
1802         encode_nops(&hdr);
1803         return 0;
1804 }
1805
1806 /*
1807  * Encode SYMLINK request
1808  */
1809 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1810 {
1811         return nfs4_xdr_enc_create(req, p, args);
1812 }
1813
1814 /*
1815  * Encode GETATTR request
1816  */
1817 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1818 {
1819         struct xdr_stream xdr;
1820         struct compound_hdr hdr = {
1821                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1822         };
1823
1824         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1825         encode_compound_hdr(&xdr, req, &hdr);
1826         encode_sequence(&xdr, &args->seq_args, &hdr);
1827         encode_putfh(&xdr, args->fh, &hdr);
1828         encode_getfattr(&xdr, args->bitmask, &hdr);
1829         encode_nops(&hdr);
1830         return 0;
1831 }
1832
1833 /*
1834  * Encode a CLOSE request
1835  */
1836 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1837 {
1838         struct xdr_stream xdr;
1839         struct compound_hdr hdr = {
1840                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1841         };
1842
1843         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1844         encode_compound_hdr(&xdr, req, &hdr);
1845         encode_sequence(&xdr, &args->seq_args, &hdr);
1846         encode_putfh(&xdr, args->fh, &hdr);
1847         encode_close(&xdr, args, &hdr);
1848         encode_getfattr(&xdr, args->bitmask, &hdr);
1849         encode_nops(&hdr);
1850         return 0;
1851 }
1852
1853 /*
1854  * Encode an OPEN request
1855  */
1856 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1857 {
1858         struct xdr_stream xdr;
1859         struct compound_hdr hdr = {
1860                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1861         };
1862
1863         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1864         encode_compound_hdr(&xdr, req, &hdr);
1865         encode_sequence(&xdr, &args->seq_args, &hdr);
1866         encode_putfh(&xdr, args->fh, &hdr);
1867         encode_savefh(&xdr, &hdr);
1868         encode_open(&xdr, args, &hdr);
1869         encode_getfh(&xdr, &hdr);
1870         encode_getfattr(&xdr, args->bitmask, &hdr);
1871         encode_restorefh(&xdr, &hdr);
1872         encode_getfattr(&xdr, args->bitmask, &hdr);
1873         encode_nops(&hdr);
1874         return 0;
1875 }
1876
1877 /*
1878  * Encode an OPEN_CONFIRM request
1879  */
1880 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1881 {
1882         struct xdr_stream xdr;
1883         struct compound_hdr hdr = {
1884                 .nops   = 0,
1885         };
1886
1887         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1888         encode_compound_hdr(&xdr, req, &hdr);
1889         encode_putfh(&xdr, args->fh, &hdr);
1890         encode_open_confirm(&xdr, args, &hdr);
1891         encode_nops(&hdr);
1892         return 0;
1893 }
1894
1895 /*
1896  * Encode an OPEN request with no attributes.
1897  */
1898 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1899 {
1900         struct xdr_stream xdr;
1901         struct compound_hdr hdr = {
1902                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1903         };
1904
1905         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1906         encode_compound_hdr(&xdr, req, &hdr);
1907         encode_sequence(&xdr, &args->seq_args, &hdr);
1908         encode_putfh(&xdr, args->fh, &hdr);
1909         encode_open(&xdr, args, &hdr);
1910         encode_getfattr(&xdr, args->bitmask, &hdr);
1911         encode_nops(&hdr);
1912         return 0;
1913 }
1914
1915 /*
1916  * Encode an OPEN_DOWNGRADE request
1917  */
1918 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1919 {
1920         struct xdr_stream xdr;
1921         struct compound_hdr hdr = {
1922                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1923         };
1924
1925         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1926         encode_compound_hdr(&xdr, req, &hdr);
1927         encode_sequence(&xdr, &args->seq_args, &hdr);
1928         encode_putfh(&xdr, args->fh, &hdr);
1929         encode_open_downgrade(&xdr, args, &hdr);
1930         encode_getfattr(&xdr, args->bitmask, &hdr);
1931         encode_nops(&hdr);
1932         return 0;
1933 }
1934
1935 /*
1936  * Encode a LOCK request
1937  */
1938 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1939 {
1940         struct xdr_stream xdr;
1941         struct compound_hdr hdr = {
1942                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1943         };
1944
1945         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1946         encode_compound_hdr(&xdr, req, &hdr);
1947         encode_sequence(&xdr, &args->seq_args, &hdr);
1948         encode_putfh(&xdr, args->fh, &hdr);
1949         encode_lock(&xdr, args, &hdr);
1950         encode_nops(&hdr);
1951         return 0;
1952 }
1953
1954 /*
1955  * Encode a LOCKT request
1956  */
1957 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1958 {
1959         struct xdr_stream xdr;
1960         struct compound_hdr hdr = {
1961                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1962         };
1963
1964         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1965         encode_compound_hdr(&xdr, req, &hdr);
1966         encode_sequence(&xdr, &args->seq_args, &hdr);
1967         encode_putfh(&xdr, args->fh, &hdr);
1968         encode_lockt(&xdr, args, &hdr);
1969         encode_nops(&hdr);
1970         return 0;
1971 }
1972
1973 /*
1974  * Encode a LOCKU request
1975  */
1976 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1977 {
1978         struct xdr_stream xdr;
1979         struct compound_hdr hdr = {
1980                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1981         };
1982
1983         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1984         encode_compound_hdr(&xdr, req, &hdr);
1985         encode_sequence(&xdr, &args->seq_args, &hdr);
1986         encode_putfh(&xdr, args->fh, &hdr);
1987         encode_locku(&xdr, args, &hdr);
1988         encode_nops(&hdr);
1989         return 0;
1990 }
1991
1992 /*
1993  * Encode a READLINK request
1994  */
1995 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1996 {
1997         struct xdr_stream xdr;
1998         struct compound_hdr hdr = {
1999                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2000         };
2001
2002         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2003         encode_compound_hdr(&xdr, req, &hdr);
2004         encode_sequence(&xdr, &args->seq_args, &hdr);
2005         encode_putfh(&xdr, args->fh, &hdr);
2006         encode_readlink(&xdr, args, req, &hdr);
2007
2008         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2009                         args->pgbase, args->pglen);
2010         encode_nops(&hdr);
2011         return 0;
2012 }
2013
2014 /*
2015  * Encode a READDIR request
2016  */
2017 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2018 {
2019         struct xdr_stream xdr;
2020         struct compound_hdr hdr = {
2021                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022         };
2023
2024         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2025         encode_compound_hdr(&xdr, req, &hdr);
2026         encode_sequence(&xdr, &args->seq_args, &hdr);
2027         encode_putfh(&xdr, args->fh, &hdr);
2028         encode_readdir(&xdr, args, req, &hdr);
2029
2030         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2031                          args->pgbase, args->count);
2032         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2033                         __func__, hdr.replen << 2, args->pages,
2034                         args->pgbase, args->count);
2035         encode_nops(&hdr);
2036         return 0;
2037 }
2038
2039 /*
2040  * Encode a READ request
2041  */
2042 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2043 {
2044         struct xdr_stream xdr;
2045         struct compound_hdr hdr = {
2046                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2047         };
2048
2049         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2050         encode_compound_hdr(&xdr, req, &hdr);
2051         encode_sequence(&xdr, &args->seq_args, &hdr);
2052         encode_putfh(&xdr, args->fh, &hdr);
2053         encode_read(&xdr, args, &hdr);
2054
2055         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2056                          args->pages, args->pgbase, args->count);
2057         req->rq_rcv_buf.flags |= XDRBUF_READ;
2058         encode_nops(&hdr);
2059         return 0;
2060 }
2061
2062 /*
2063  * Encode an SETATTR request
2064  */
2065 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2066 {
2067         struct xdr_stream xdr;
2068         struct compound_hdr hdr = {
2069                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2070         };
2071
2072         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2073         encode_compound_hdr(&xdr, req, &hdr);
2074         encode_sequence(&xdr, &args->seq_args, &hdr);
2075         encode_putfh(&xdr, args->fh, &hdr);
2076         encode_setattr(&xdr, args, args->server, &hdr);
2077         encode_getfattr(&xdr, args->bitmask, &hdr);
2078         encode_nops(&hdr);
2079         return 0;
2080 }
2081
2082 /*
2083  * Encode a GETACL request
2084  */
2085 static int
2086 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2087                 struct nfs_getaclargs *args)
2088 {
2089         struct xdr_stream xdr;
2090         struct compound_hdr hdr = {
2091                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2092         };
2093         uint32_t replen;
2094
2095         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2096         encode_compound_hdr(&xdr, req, &hdr);
2097         encode_sequence(&xdr, &args->seq_args, &hdr);
2098         encode_putfh(&xdr, args->fh, &hdr);
2099         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
2100         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2101
2102         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2103                 args->acl_pages, args->acl_pgbase, args->acl_len);
2104         encode_nops(&hdr);
2105         return 0;
2106 }
2107
2108 /*
2109  * Encode a WRITE request
2110  */
2111 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2112 {
2113         struct xdr_stream xdr;
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2119         encode_compound_hdr(&xdr, req, &hdr);
2120         encode_sequence(&xdr, &args->seq_args, &hdr);
2121         encode_putfh(&xdr, args->fh, &hdr);
2122         encode_write(&xdr, args, &hdr);
2123         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2124         encode_getfattr(&xdr, args->bitmask, &hdr);
2125         encode_nops(&hdr);
2126         return 0;
2127 }
2128
2129 /*
2130  *  a COMMIT request
2131  */
2132 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2133 {
2134         struct xdr_stream xdr;
2135         struct compound_hdr hdr = {
2136                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137         };
2138
2139         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140         encode_compound_hdr(&xdr, req, &hdr);
2141         encode_sequence(&xdr, &args->seq_args, &hdr);
2142         encode_putfh(&xdr, args->fh, &hdr);
2143         encode_commit(&xdr, args, &hdr);
2144         encode_getfattr(&xdr, args->bitmask, &hdr);
2145         encode_nops(&hdr);
2146         return 0;
2147 }
2148
2149 /*
2150  * FSINFO request
2151  */
2152 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2153 {
2154         struct xdr_stream xdr;
2155         struct compound_hdr hdr = {
2156                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2157         };
2158
2159         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2160         encode_compound_hdr(&xdr, req, &hdr);
2161         encode_sequence(&xdr, &args->seq_args, &hdr);
2162         encode_putfh(&xdr, args->fh, &hdr);
2163         encode_fsinfo(&xdr, args->bitmask, &hdr);
2164         encode_nops(&hdr);
2165         return 0;
2166 }
2167
2168 /*
2169  * a PATHCONF request
2170  */
2171 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2172 {
2173         struct xdr_stream xdr;
2174         struct compound_hdr hdr = {
2175                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176         };
2177
2178         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2179         encode_compound_hdr(&xdr, req, &hdr);
2180         encode_sequence(&xdr, &args->seq_args, &hdr);
2181         encode_putfh(&xdr, args->fh, &hdr);
2182         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2183                            &hdr);
2184         encode_nops(&hdr);
2185         return 0;
2186 }
2187
2188 /*
2189  * a STATFS request
2190  */
2191 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2192 {
2193         struct xdr_stream xdr;
2194         struct compound_hdr hdr = {
2195                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2196         };
2197
2198         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2199         encode_compound_hdr(&xdr, req, &hdr);
2200         encode_sequence(&xdr, &args->seq_args, &hdr);
2201         encode_putfh(&xdr, args->fh, &hdr);
2202         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2203                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2204         encode_nops(&hdr);
2205         return 0;
2206 }
2207
2208 /*
2209  * GETATTR_BITMAP request
2210  */
2211 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2212                                     struct nfs4_server_caps_arg *args)
2213 {
2214         struct xdr_stream xdr;
2215         struct compound_hdr hdr = {
2216                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217         };
2218
2219         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2220         encode_compound_hdr(&xdr, req, &hdr);
2221         encode_sequence(&xdr, &args->seq_args, &hdr);
2222         encode_putfh(&xdr, args->fhandle, &hdr);
2223         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2224                            FATTR4_WORD0_LINK_SUPPORT|
2225                            FATTR4_WORD0_SYMLINK_SUPPORT|
2226                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2227         encode_nops(&hdr);
2228         return 0;
2229 }
2230
2231 /*
2232  * a RENEW request
2233  */
2234 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2235 {
2236         struct xdr_stream xdr;
2237         struct compound_hdr hdr = {
2238                 .nops   = 0,
2239         };
2240
2241         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2242         encode_compound_hdr(&xdr, req, &hdr);
2243         encode_renew(&xdr, clp, &hdr);
2244         encode_nops(&hdr);
2245         return 0;
2246 }
2247
2248 /*
2249  * a SETCLIENTID request
2250  */
2251 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2252 {
2253         struct xdr_stream xdr;
2254         struct compound_hdr hdr = {
2255                 .nops   = 0,
2256         };
2257
2258         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2259         encode_compound_hdr(&xdr, req, &hdr);
2260         encode_setclientid(&xdr, sc, &hdr);
2261         encode_nops(&hdr);
2262         return 0;
2263 }
2264
2265 /*
2266  * a SETCLIENTID_CONFIRM request
2267  */
2268 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2269 {
2270         struct xdr_stream xdr;
2271         struct compound_hdr hdr = {
2272                 .nops   = 0,
2273         };
2274         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2275
2276         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2277         encode_compound_hdr(&xdr, req, &hdr);
2278         encode_setclientid_confirm(&xdr, clp, &hdr);
2279         encode_putrootfh(&xdr, &hdr);
2280         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2281         encode_nops(&hdr);
2282         return 0;
2283 }
2284
2285 /*
2286  * DELEGRETURN request
2287  */
2288 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2289 {
2290         struct xdr_stream xdr;
2291         struct compound_hdr hdr = {
2292                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2293         };
2294
2295         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2296         encode_compound_hdr(&xdr, req, &hdr);
2297         encode_sequence(&xdr, &args->seq_args, &hdr);
2298         encode_putfh(&xdr, args->fhandle, &hdr);
2299         encode_delegreturn(&xdr, args->stateid, &hdr);
2300         encode_getfattr(&xdr, args->bitmask, &hdr);
2301         encode_nops(&hdr);
2302         return 0;
2303 }
2304
2305 /*
2306  * Encode FS_LOCATIONS request
2307  */
2308 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2309 {
2310         struct xdr_stream xdr;
2311         struct compound_hdr hdr = {
2312                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2313         };
2314         uint32_t replen;
2315
2316         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2317         encode_compound_hdr(&xdr, req, &hdr);
2318         encode_sequence(&xdr, &args->seq_args, &hdr);
2319         encode_putfh(&xdr, args->dir_fh, &hdr);
2320         encode_lookup(&xdr, args->name, &hdr);
2321         replen = hdr.replen;    /* get the attribute into args->page */
2322         encode_fs_locations(&xdr, args->bitmask, &hdr);
2323
2324         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2325                         0, PAGE_SIZE);
2326         encode_nops(&hdr);
2327         return 0;
2328 }
2329
2330 #if defined(CONFIG_NFS_V4_1)
2331 /*
2332  * EXCHANGE_ID request
2333  */
2334 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2335                                     struct nfs41_exchange_id_args *args)
2336 {
2337         struct xdr_stream xdr;
2338         struct compound_hdr hdr = {
2339                 .minorversion = args->client->cl_minorversion,
2340         };
2341
2342         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2343         encode_compound_hdr(&xdr, req, &hdr);
2344         encode_exchange_id(&xdr, args, &hdr);
2345         encode_nops(&hdr);
2346         return 0;
2347 }
2348
2349 /*
2350  * a CREATE_SESSION request
2351  */
2352 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2353                                        struct nfs41_create_session_args *args)
2354 {
2355         struct xdr_stream xdr;
2356         struct compound_hdr hdr = {
2357                 .minorversion = args->client->cl_minorversion,
2358         };
2359
2360         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2361         encode_compound_hdr(&xdr, req, &hdr);
2362         encode_create_session(&xdr, args, &hdr);
2363         encode_nops(&hdr);
2364         return 0;
2365 }
2366
2367 /*
2368  * a DESTROY_SESSION request
2369  */
2370 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2371                                         struct nfs4_session *session)
2372 {
2373         struct xdr_stream xdr;
2374         struct compound_hdr hdr = {
2375                 .minorversion = session->clp->cl_minorversion,
2376         };
2377
2378         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2379         encode_compound_hdr(&xdr, req, &hdr);
2380         encode_destroy_session(&xdr, session, &hdr);
2381         encode_nops(&hdr);
2382         return 0;
2383 }
2384
2385 /*
2386  * a SEQUENCE request
2387  */
2388 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2389                                  struct nfs4_sequence_args *args)
2390 {
2391         struct xdr_stream xdr;
2392         struct compound_hdr hdr = {
2393                 .minorversion = nfs4_xdr_minorversion(args),
2394         };
2395
2396         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2397         encode_compound_hdr(&xdr, req, &hdr);
2398         encode_sequence(&xdr, args, &hdr);
2399         encode_nops(&hdr);
2400         return 0;
2401 }
2402
2403 /*
2404  * a GET_LEASE_TIME request
2405  */
2406 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2407                                        struct nfs4_get_lease_time_args *args)
2408 {
2409         struct xdr_stream xdr;
2410         struct compound_hdr hdr = {
2411                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2412         };
2413         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2414
2415         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2416         encode_compound_hdr(&xdr, req, &hdr);
2417         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2418         encode_putrootfh(&xdr, &hdr);
2419         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2420         encode_nops(&hdr);
2421         return 0;
2422 }
2423 #endif /* CONFIG_NFS_V4_1 */
2424
2425 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2426 {
2427         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2428                 "Remaining buffer length is %tu words.\n",
2429                 func, xdr->end - xdr->p);
2430 }
2431
2432 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2433 {
2434         __be32 *p;
2435
2436         p = xdr_inline_decode(xdr, 4);
2437         if (unlikely(!p))
2438                 goto out_overflow;
2439         *len = be32_to_cpup(p);
2440         p = xdr_inline_decode(xdr, *len);
2441         if (unlikely(!p))
2442                 goto out_overflow;
2443         *string = (char *)p;
2444         return 0;
2445 out_overflow:
2446         print_overflow_msg(__func__, xdr);
2447         return -EIO;
2448 }
2449
2450 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2451 {
2452         __be32 *p;
2453
2454         p = xdr_inline_decode(xdr, 8);
2455         if (unlikely(!p))
2456                 goto out_overflow;
2457         hdr->status = be32_to_cpup(p++);
2458         hdr->taglen = be32_to_cpup(p);
2459
2460         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2461         if (unlikely(!p))
2462                 goto out_overflow;
2463         hdr->tag = (char *)p;
2464         p += XDR_QUADLEN(hdr->taglen);
2465         hdr->nops = be32_to_cpup(p);
2466         if (unlikely(hdr->nops < 1))
2467                 return nfs4_stat_to_errno(hdr->status);
2468         return 0;
2469 out_overflow:
2470         print_overflow_msg(__func__, xdr);
2471         return -EIO;
2472 }
2473
2474 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2475 {
2476         __be32 *p;
2477         uint32_t opnum;
2478         int32_t nfserr;
2479
2480         p = xdr_inline_decode(xdr, 8);
2481         if (unlikely(!p))
2482                 goto out_overflow;
2483         opnum = be32_to_cpup(p++);
2484         if (opnum != expected) {
2485                 dprintk("nfs: Server returned operation"
2486                         " %d but we issued a request for %d\n",
2487                                 opnum, expected);
2488                 return -EIO;
2489         }
2490         nfserr = be32_to_cpup(p);
2491         if (nfserr != NFS_OK)
2492                 return nfs4_stat_to_errno(nfserr);
2493         return 0;
2494 out_overflow:
2495         print_overflow_msg(__func__, xdr);
2496         return -EIO;
2497 }
2498
2499 /* Dummy routine */
2500 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2501 {
2502         __be32 *p;
2503         unsigned int strlen;
2504         char *str;
2505
2506         p = xdr_inline_decode(xdr, 12);
2507         if (likely(p))
2508                 return decode_opaque_inline(xdr, &strlen, &str);
2509         print_overflow_msg(__func__, xdr);
2510         return -EIO;
2511 }
2512
2513 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2514 {
2515         uint32_t bmlen;
2516         __be32 *p;
2517
2518         p = xdr_inline_decode(xdr, 4);
2519         if (unlikely(!p))
2520                 goto out_overflow;
2521         bmlen = be32_to_cpup(p);
2522
2523         bitmap[0] = bitmap[1] = 0;
2524         p = xdr_inline_decode(xdr, (bmlen << 2));
2525         if (unlikely(!p))
2526                 goto out_overflow;
2527         if (bmlen > 0) {
2528                 bitmap[0] = be32_to_cpup(p++);
2529                 if (bmlen > 1)
2530                         bitmap[1] = be32_to_cpup(p);
2531         }
2532         return 0;
2533 out_overflow:
2534         print_overflow_msg(__func__, xdr);
2535         return -EIO;
2536 }
2537
2538 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2539 {
2540         __be32 *p;
2541
2542         p = xdr_inline_decode(xdr, 4);
2543         if (unlikely(!p))
2544                 goto out_overflow;
2545         *attrlen = be32_to_cpup(p);
2546         *savep = xdr->p;
2547         return 0;
2548 out_overflow:
2549         print_overflow_msg(__func__, xdr);
2550         return -EIO;
2551 }
2552
2553 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2554 {
2555         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2556                 decode_attr_bitmap(xdr, bitmask);
2557                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2558         } else
2559                 bitmask[0] = bitmask[1] = 0;
2560         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2561         return 0;
2562 }
2563
2564 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2565 {
2566         __be32 *p;
2567         int ret = 0;
2568
2569         *type = 0;
2570         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2571                 return -EIO;
2572         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2573                 p = xdr_inline_decode(xdr, 4);
2574                 if (unlikely(!p))
2575                         goto out_overflow;
2576                 *type = be32_to_cpup(p);
2577                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2578                         dprintk("%s: bad type %d\n", __func__, *type);
2579                         return -EIO;
2580                 }
2581                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2582                 ret = NFS_ATTR_FATTR_TYPE;
2583         }
2584         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2585         return ret;
2586 out_overflow:
2587         print_overflow_msg(__func__, xdr);
2588         return -EIO;
2589 }
2590
2591 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2592 {
2593         __be32 *p;
2594         int ret = 0;
2595
2596         *change = 0;
2597         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2598                 return -EIO;
2599         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2600                 p = xdr_inline_decode(xdr, 8);
2601                 if (unlikely(!p))
2602                         goto out_overflow;
2603                 xdr_decode_hyper(p, change);
2604                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2605                 ret = NFS_ATTR_FATTR_CHANGE;
2606         }
2607         dprintk("%s: change attribute=%Lu\n", __func__,
2608                         (unsigned long long)*change);
2609         return ret;
2610 out_overflow:
2611         print_overflow_msg(__func__, xdr);
2612         return -EIO;
2613 }
2614
2615 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2616 {
2617         __be32 *p;
2618         int ret = 0;
2619
2620         *size = 0;
2621         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2622                 return -EIO;
2623         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2624                 p = xdr_inline_decode(xdr, 8);
2625                 if (unlikely(!p))
2626                         goto out_overflow;
2627                 xdr_decode_hyper(p, size);
2628                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2629                 ret = NFS_ATTR_FATTR_SIZE;
2630         }
2631         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2632         return ret;
2633 out_overflow:
2634         print_overflow_msg(__func__, xdr);
2635         return -EIO;
2636 }
2637
2638 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2639 {
2640         __be32 *p;
2641
2642         *res = 0;
2643         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2644                 return -EIO;
2645         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2646                 p = xdr_inline_decode(xdr, 4);
2647                 if (unlikely(!p))
2648                         goto out_overflow;
2649                 *res = be32_to_cpup(p);
2650                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2651         }
2652         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2653         return 0;
2654 out_overflow:
2655         print_overflow_msg(__func__, xdr);
2656         return -EIO;
2657 }
2658
2659 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2660 {
2661         __be32 *p;
2662
2663         *res = 0;
2664         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2665                 return -EIO;
2666         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2667                 p = xdr_inline_decode(xdr, 4);
2668                 if (unlikely(!p))
2669                         goto out_overflow;
2670                 *res = be32_to_cpup(p);
2671                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2672         }
2673         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2674         return 0;
2675 out_overflow:
2676         print_overflow_msg(__func__, xdr);
2677         return -EIO;
2678 }
2679
2680 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2681 {
2682         __be32 *p;
2683         int ret = 0;
2684
2685         fsid->major = 0;
2686         fsid->minor = 0;
2687         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2688                 return -EIO;
2689         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2690                 p = xdr_inline_decode(xdr, 16);
2691                 if (unlikely(!p))
2692                         goto out_overflow;
2693                 p = xdr_decode_hyper(p, &fsid->major);
2694                 xdr_decode_hyper(p, &fsid->minor);
2695                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2696                 ret = NFS_ATTR_FATTR_FSID;
2697         }
2698         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2699                         (unsigned long long)fsid->major,
2700                         (unsigned long long)fsid->minor);
2701         return ret;
2702 out_overflow:
2703         print_overflow_msg(__func__, xdr);
2704         return -EIO;
2705 }
2706
2707 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2708 {
2709         __be32 *p;
2710
2711         *res = 60;
2712         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2713                 return -EIO;
2714         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2715                 p = xdr_inline_decode(xdr, 4);
2716                 if (unlikely(!p))
2717                         goto out_overflow;
2718                 *res = be32_to_cpup(p);
2719                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2720         }
2721         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2722         return 0;
2723 out_overflow:
2724         print_overflow_msg(__func__, xdr);
2725         return -EIO;
2726 }
2727
2728 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2729 {
2730         __be32 *p;
2731
2732         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2733         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2734                 return -EIO;
2735         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2736                 p = xdr_inline_decode(xdr, 4);
2737                 if (unlikely(!p))
2738                         goto out_overflow;
2739                 *res = be32_to_cpup(p);
2740                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2741         }
2742         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2743         return 0;
2744 out_overflow:
2745         print_overflow_msg(__func__, xdr);
2746         return -EIO;
2747 }
2748
2749 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2750 {
2751         __be32 *p;
2752         int ret = 0;
2753
2754         *fileid = 0;
2755         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2756                 return -EIO;
2757         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2758                 p = xdr_inline_decode(xdr, 8);
2759                 if (unlikely(!p))
2760                         goto out_overflow;
2761                 xdr_decode_hyper(p, fileid);
2762                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2763                 ret = NFS_ATTR_FATTR_FILEID;
2764         }
2765         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2766         return ret;
2767 out_overflow:
2768         print_overflow_msg(__func__, xdr);
2769         return -EIO;
2770 }
2771
2772 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2773 {
2774         __be32 *p;
2775         int ret = 0;
2776
2777         *fileid = 0;
2778         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2779                 return -EIO;
2780         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2781                 p = xdr_inline_decode(xdr, 8);
2782                 if (unlikely(!p))
2783                         goto out_overflow;
2784                 xdr_decode_hyper(p, fileid);
2785                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2786                 ret = NFS_ATTR_FATTR_FILEID;
2787         }
2788         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2789         return ret;
2790 out_overflow:
2791         print_overflow_msg(__func__, xdr);
2792         return -EIO;
2793 }
2794
2795 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2796 {
2797         __be32 *p;
2798         int status = 0;
2799
2800         *res = 0;
2801         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2802                 return -EIO;
2803         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2804                 p = xdr_inline_decode(xdr, 8);
2805                 if (unlikely(!p))
2806                         goto out_overflow;
2807                 xdr_decode_hyper(p, res);
2808                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2809         }
2810         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2811         return status;
2812 out_overflow:
2813         print_overflow_msg(__func__, xdr);
2814         return -EIO;
2815 }
2816
2817 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2818 {
2819         __be32 *p;
2820         int status = 0;
2821
2822         *res = 0;
2823         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2824                 return -EIO;
2825         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2826                 p = xdr_inline_decode(xdr, 8);
2827                 if (unlikely(!p))
2828                         goto out_overflow;
2829                 xdr_decode_hyper(p, res);
2830                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2831         }
2832         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2833         return status;
2834 out_overflow:
2835         print_overflow_msg(__func__, xdr);
2836         return -EIO;
2837 }
2838
2839 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2840 {
2841         __be32 *p;
2842         int status = 0;
2843
2844         *res = 0;
2845         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2846                 return -EIO;
2847         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2848                 p = xdr_inline_decode(xdr, 8);
2849                 if (unlikely(!p))
2850                         goto out_overflow;
2851                 xdr_decode_hyper(p, res);
2852                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2853         }
2854         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2855         return status;
2856 out_overflow:
2857         print_overflow_msg(__func__, xdr);
2858         return -EIO;
2859 }
2860
2861 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2862 {
2863         u32 n;
2864         __be32 *p;
2865         int status = 0;
2866
2867         p = xdr_inline_decode(xdr, 4);
2868         if (unlikely(!p))
2869                 goto out_overflow;
2870         n = be32_to_cpup(p);
2871         if (n == 0)
2872                 goto root_path;
2873         dprintk("path ");
2874         path->ncomponents = 0;
2875         while (path->ncomponents < n) {
2876                 struct nfs4_string *component = &path->components[path->ncomponents];
2877                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2878                 if (unlikely(status != 0))
2879                         goto out_eio;
2880                 if (path->ncomponents != n)
2881                         dprintk("/");
2882                 dprintk("%s", component->data);
2883                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2884                         path->ncomponents++;
2885                 else {
2886                         dprintk("cannot parse %d components in path\n", n);
2887                         goto out_eio;
2888                 }
2889         }
2890 out:
2891         dprintk("\n");
2892         return status;
2893 root_path:
2894 /* a root pathname is sent as a zero component4 */
2895         path->ncomponents = 1;
2896         path->components[0].len=0;
2897         path->components[0].data=NULL;
2898         dprintk("path /\n");
2899         goto out;
2900 out_eio:
2901         dprintk(" status %d", status);
2902         status = -EIO;
2903         goto out;
2904 out_overflow:
2905         print_overflow_msg(__func__, xdr);
2906         return -EIO;
2907 }
2908
2909 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2910 {
2911         int n;
2912         __be32 *p;
2913         int status = -EIO;
2914
2915         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2916                 goto out;
2917         status = 0;
2918         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2919                 goto out;
2920         dprintk("%s: fsroot ", __func__);
2921         status = decode_pathname(xdr, &res->fs_path);
2922         if (unlikely(status != 0))
2923                 goto out;
2924         p = xdr_inline_decode(xdr, 4);
2925         if (unlikely(!p))
2926                 goto out_overflow;
2927         n = be32_to_cpup(p);
2928         if (n <= 0)
2929                 goto out_eio;
2930         res->nlocations = 0;
2931         while (res->nlocations < n) {
2932                 u32 m;
2933                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2934
2935                 p = xdr_inline_decode(xdr, 4);
2936                 if (unlikely(!p))
2937                         goto out_overflow;
2938                 m = be32_to_cpup(p);
2939
2940                 loc->nservers = 0;
2941                 dprintk("%s: servers ", __func__);
2942                 while (loc->nservers < m) {
2943                         struct nfs4_string *server = &loc->servers[loc->nservers];
2944                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2945                         if (unlikely(status != 0))
2946                                 goto out_eio;
2947                         dprintk("%s ", server->data);
2948                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2949                                 loc->nservers++;
2950                         else {
2951                                 unsigned int i;
2952                                 dprintk("%s: using first %u of %u servers "
2953                                         "returned for location %u\n",
2954                                                 __func__,
2955                                                 NFS4_FS_LOCATION_MAXSERVERS,
2956                                                 m, res->nlocations);
2957                                 for (i = loc->nservers; i < m; i++) {
2958                                         unsigned int len;
2959                                         char *data;
2960                                         status = decode_opaque_inline(xdr, &len, &data);
2961                                         if (unlikely(status != 0))
2962                                                 goto out_eio;
2963                                 }
2964                         }
2965                 }
2966                 status = decode_pathname(xdr, &loc->rootpath);
2967                 if (unlikely(status != 0))
2968                         goto out_eio;
2969                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2970                         res->nlocations++;
2971         }
2972         if (res->nlocations != 0)
2973                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2974 out:
2975         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2976         return status;
2977 out_overflow:
2978         print_overflow_msg(__func__, xdr);
2979 out_eio:
2980         status = -EIO;
2981         goto out;
2982 }
2983
2984 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2985 {
2986         __be32 *p;
2987         int status = 0;
2988
2989         *res = 0;
2990         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2991                 return -EIO;
2992         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2993                 p = xdr_inline_decode(xdr, 8);
2994                 if (unlikely(!p))
2995                         goto out_overflow;
2996                 xdr_decode_hyper(p, res);
2997                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2998         }
2999         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3000         return status;
3001 out_overflow:
3002         print_overflow_msg(__func__, xdr);
3003         return -EIO;
3004 }
3005
3006 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3007 {
3008         __be32 *p;
3009         int status = 0;
3010
3011         *maxlink = 1;
3012         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3013                 return -EIO;
3014         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3015                 p = xdr_inline_decode(xdr, 4);
3016                 if (unlikely(!p))
3017                         goto out_overflow;
3018                 *maxlink = be32_to_cpup(p);
3019                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3020         }
3021         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3022         return status;
3023 out_overflow:
3024         print_overflow_msg(__func__, xdr);
3025         return -EIO;
3026 }
3027
3028 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3029 {
3030         __be32 *p;
3031         int status = 0;
3032
3033         *maxname = 1024;
3034         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3035                 return -EIO;
3036         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3037                 p = xdr_inline_decode(xdr, 4);
3038                 if (unlikely(!p))
3039                         goto out_overflow;
3040                 *maxname = be32_to_cpup(p);
3041                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3042         }
3043         dprintk("%s: maxname=%u\n", __func__, *maxname);
3044         return status;
3045 out_overflow:
3046         print_overflow_msg(__func__, xdr);
3047         return -EIO;
3048 }
3049
3050 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3051 {
3052         __be32 *p;
3053         int status = 0;
3054
3055         *res = 1024;
3056         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3057                 return -EIO;
3058         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3059                 uint64_t maxread;
3060                 p = xdr_inline_decode(xdr, 8);
3061                 if (unlikely(!p))
3062                         goto out_overflow;
3063                 xdr_decode_hyper(p, &maxread);
3064                 if (maxread > 0x7FFFFFFF)
3065                         maxread = 0x7FFFFFFF;
3066                 *res = (uint32_t)maxread;
3067                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3068         }
3069         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3070         return status;
3071 out_overflow:
3072         print_overflow_msg(__func__, xdr);
3073         return -EIO;
3074 }
3075
3076 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3077 {
3078         __be32 *p;
3079         int status = 0;
3080
3081         *res = 1024;
3082         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3083                 return -EIO;
3084         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3085                 uint64_t maxwrite;
3086                 p = xdr_inline_decode(xdr, 8);
3087                 if (unlikely(!p))
3088                         goto out_overflow;
3089                 xdr_decode_hyper(p, &maxwrite);
3090                 if (maxwrite > 0x7FFFFFFF)
3091                         maxwrite = 0x7FFFFFFF;
3092                 *res = (uint32_t)maxwrite;
3093                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3094         }
3095         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3096         return status;
3097 out_overflow:
3098         print_overflow_msg(__func__, xdr);
3099         return -EIO;
3100 }
3101
3102 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3103 {
3104         uint32_t tmp;
3105         __be32 *p;
3106         int ret = 0;
3107
3108         *mode = 0;
3109         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3110                 return -EIO;
3111         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3112                 p = xdr_inline_decode(xdr, 4);
3113                 if (unlikely(!p))
3114                         goto out_overflow;
3115                 tmp = be32_to_cpup(p);
3116                 *mode = tmp & ~S_IFMT;
3117                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3118                 ret = NFS_ATTR_FATTR_MODE;
3119         }
3120         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3121         return ret;
3122 out_overflow:
3123         print_overflow_msg(__func__, xdr);
3124         return -EIO;
3125 }
3126
3127 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3128 {
3129         __be32 *p;
3130         int ret = 0;
3131
3132         *nlink = 1;
3133         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3134                 return -EIO;
3135         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3136                 p = xdr_inline_decode(xdr, 4);
3137                 if (unlikely(!p))
3138                         goto out_overflow;
3139                 *nlink = be32_to_cpup(p);
3140                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3141                 ret = NFS_ATTR_FATTR_NLINK;
3142         }
3143         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3144         return ret;
3145 out_overflow:
3146         print_overflow_msg(__func__, xdr);
3147         return -EIO;
3148 }
3149
3150 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3151                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3152 {
3153         uint32_t len;
3154         __be32 *p;
3155         int ret = 0;
3156
3157         *uid = -2;
3158         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3159                 return -EIO;
3160         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3161                 p = xdr_inline_decode(xdr, 4);
3162                 if (unlikely(!p))
3163                         goto out_overflow;
3164                 len = be32_to_cpup(p);
3165                 p = xdr_inline_decode(xdr, len);
3166                 if (unlikely(!p))
3167                         goto out_overflow;
3168                 if (!may_sleep) {
3169                         /* do nothing */
3170                 } else if (len < XDR_MAX_NETOBJ) {
3171                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3172                                 ret = NFS_ATTR_FATTR_OWNER;
3173                         else
3174                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3175                                                 __func__);
3176                 } else
3177                         dprintk("%s: name too long (%u)!\n",
3178                                         __func__, len);
3179                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3180         }
3181         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3182         return ret;
3183 out_overflow:
3184         print_overflow_msg(__func__, xdr);
3185         return -EIO;
3186 }
3187
3188 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3189                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3190 {
3191         uint32_t len;
3192         __be32 *p;
3193         int ret = 0;
3194
3195         *gid = -2;
3196         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3197                 return -EIO;
3198         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3199                 p = xdr_inline_decode(xdr, 4);
3200                 if (unlikely(!p))
3201                         goto out_overflow;
3202                 len = be32_to_cpup(p);
3203                 p = xdr_inline_decode(xdr, len);
3204                 if (unlikely(!p))
3205                         goto out_overflow;
3206                 if (!may_sleep) {
3207                         /* do nothing */
3208                 } else if (len < XDR_MAX_NETOBJ) {
3209                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3210                                 ret = NFS_ATTR_FATTR_GROUP;
3211                         else
3212                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3213                                                 __func__);
3214                 } else
3215                         dprintk("%s: name too long (%u)!\n",
3216                                         __func__, len);
3217                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3218         }
3219         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3220         return ret;
3221 out_overflow:
3222         print_overflow_msg(__func__, xdr);
3223         return -EIO;
3224 }
3225
3226 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3227 {
3228         uint32_t major = 0, minor = 0;
3229         __be32 *p;
3230         int ret = 0;
3231
3232         *rdev = MKDEV(0,0);
3233         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3234                 return -EIO;
3235         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3236                 dev_t tmp;
3237
3238                 p = xdr_inline_decode(xdr, 8);
3239                 if (unlikely(!p))
3240                         goto out_overflow;
3241                 major = be32_to_cpup(p++);
3242                 minor = be32_to_cpup(p);
3243                 tmp = MKDEV(major, minor);
3244                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3245                         *rdev = tmp;
3246                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3247                 ret = NFS_ATTR_FATTR_RDEV;
3248         }
3249         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3250         return ret;
3251 out_overflow:
3252         print_overflow_msg(__func__, xdr);
3253         return -EIO;
3254 }
3255
3256 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3257 {
3258         __be32 *p;
3259         int status = 0;
3260
3261         *res = 0;
3262         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3263                 return -EIO;
3264         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3265                 p = xdr_inline_decode(xdr, 8);
3266                 if (unlikely(!p))
3267                         goto out_overflow;
3268                 xdr_decode_hyper(p, res);
3269                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3270         }
3271         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3272         return status;
3273 out_overflow:
3274         print_overflow_msg(__func__, xdr);
3275         return -EIO;
3276 }
3277
3278 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3279 {
3280         __be32 *p;
3281         int status = 0;
3282
3283         *res = 0;
3284         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3285                 return -EIO;
3286         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3287                 p = xdr_inline_decode(xdr, 8);
3288                 if (unlikely(!p))
3289                         goto out_overflow;
3290                 xdr_decode_hyper(p, res);
3291                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3292         }
3293         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3294         return status;
3295 out_overflow:
3296         print_overflow_msg(__func__, xdr);
3297         return -EIO;
3298 }
3299
3300 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3301 {
3302         __be32 *p;
3303         int status = 0;
3304
3305         *res = 0;
3306         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3307                 return -EIO;
3308         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3309                 p = xdr_inline_decode(xdr, 8);
3310                 if (unlikely(!p))
3311                         goto out_overflow;
3312                 xdr_decode_hyper(p, res);
3313                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3314         }
3315         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3316         return status;
3317 out_overflow:
3318         print_overflow_msg(__func__, xdr);
3319         return -EIO;
3320 }
3321
3322 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3323 {
3324         __be32 *p;
3325         int ret = 0;
3326
3327         *used = 0;
3328         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3329                 return -EIO;
3330         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3331                 p = xdr_inline_decode(xdr, 8);
3332                 if (unlikely(!p))
3333                         goto out_overflow;
3334                 xdr_decode_hyper(p, used);
3335                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3336                 ret = NFS_ATTR_FATTR_SPACE_USED;
3337         }
3338         dprintk("%s: space used=%Lu\n", __func__,
3339                         (unsigned long long)*used);
3340         return ret;
3341 out_overflow:
3342         print_overflow_msg(__func__, xdr);
3343         return -EIO;
3344 }
3345
3346 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3347 {
3348         __be32 *p;
3349         uint64_t sec;
3350         uint32_t nsec;
3351
3352         p = xdr_inline_decode(xdr, 12);
3353         if (unlikely(!p))
3354                 goto out_overflow;
3355         p = xdr_decode_hyper(p, &sec);
3356         nsec = be32_to_cpup(p);
3357         time->tv_sec = (time_t)sec;
3358         time->tv_nsec = (long)nsec;
3359         return 0;
3360 out_overflow:
3361         print_overflow_msg(__func__, xdr);
3362         return -EIO;
3363 }
3364
3365 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3366 {
3367         int status = 0;
3368
3369         time->tv_sec = 0;
3370         time->tv_nsec = 0;
3371         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3374                 status = decode_attr_time(xdr, time);
3375                 if (status == 0)
3376                         status = NFS_ATTR_FATTR_ATIME;
3377                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3378         }
3379         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3380         return status;
3381 }
3382
3383 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3384 {
3385         int status = 0;
3386
3387         time->tv_sec = 0;
3388         time->tv_nsec = 0;
3389         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3390                 return -EIO;
3391         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3392                 status = decode_attr_time(xdr, time);
3393                 if (status == 0)
3394                         status = NFS_ATTR_FATTR_CTIME;
3395                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3396         }
3397         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3398         return status;
3399 }
3400
3401 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3402 {
3403         int status = 0;
3404
3405         time->tv_sec = 0;
3406         time->tv_nsec = 0;
3407         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3408                 return -EIO;
3409         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3410                 status = decode_attr_time(xdr, time);
3411                 if (status == 0)
3412                         status = NFS_ATTR_FATTR_MTIME;
3413                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3414         }
3415         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3416         return status;
3417 }
3418
3419 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3420 {
3421         unsigned int attrwords = XDR_QUADLEN(attrlen);
3422         unsigned int nwords = xdr->p - savep;
3423
3424         if (unlikely(attrwords != nwords)) {
3425                 dprintk("%s: server returned incorrect attribute length: "
3426                         "%u %c %u\n",
3427                                 __func__,
3428                                 attrwords << 2,
3429                                 (attrwords < nwords) ? '<' : '>',
3430                                 nwords << 2);
3431                 return -EIO;
3432         }
3433         return 0;
3434 }
3435
3436 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3437 {
3438         __be32 *p;
3439
3440         p = xdr_inline_decode(xdr, 20);
3441         if (unlikely(!p))
3442                 goto out_overflow;
3443         cinfo->atomic = be32_to_cpup(p++);
3444         p = xdr_decode_hyper(p, &cinfo->before);
3445         xdr_decode_hyper(p, &cinfo->after);
3446         return 0;
3447 out_overflow:
3448         print_overflow_msg(__func__, xdr);
3449         return -EIO;
3450 }
3451
3452 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3453 {
3454         __be32 *p;
3455         uint32_t supp, acc;
3456         int status;
3457
3458         status = decode_op_hdr(xdr, OP_ACCESS);
3459         if (status)
3460                 return status;
3461         p = xdr_inline_decode(xdr, 8);
3462         if (unlikely(!p))
3463                 goto out_overflow;
3464         supp = be32_to_cpup(p++);
3465         acc = be32_to_cpup(p);
3466         access->supported = supp;
3467         access->access = acc;
3468         return 0;
3469 out_overflow:
3470         print_overflow_msg(__func__, xdr);
3471         return -EIO;
3472 }
3473
3474 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3475 {
3476         __be32 *p;
3477
3478         p = xdr_inline_decode(xdr, len);
3479         if (likely(p)) {
3480                 memcpy(buf, p, len);
3481                 return 0;
3482         }
3483         print_overflow_msg(__func__, xdr);
3484         return -EIO;
3485 }
3486
3487 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3488 {
3489         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3490 }
3491
3492 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3493 {
3494         int status;
3495
3496         status = decode_op_hdr(xdr, OP_CLOSE);
3497         if (status != -EIO)
3498                 nfs_increment_open_seqid(status, res->seqid);
3499         if (!status)
3500                 status = decode_stateid(xdr, &res->stateid);
3501         return status;
3502 }
3503
3504 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3505 {
3506         return decode_opaque_fixed(xdr, verifier, 8);
3507 }
3508
3509 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3510 {
3511         int status;
3512
3513         status = decode_op_hdr(xdr, OP_COMMIT);
3514         if (!status)
3515                 status = decode_verifier(xdr, res->verf->verifier);
3516         return status;
3517 }
3518
3519 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3520 {
3521         __be32 *p;
3522         uint32_t bmlen;
3523         int status;
3524
3525         status = decode_op_hdr(xdr, OP_CREATE);
3526         if (status)
3527                 return status;
3528         if ((status = decode_change_info(xdr, cinfo)))
3529                 return status;
3530         p = xdr_inline_decode(xdr, 4);
3531         if (unlikely(!p))
3532                 goto out_overflow;
3533         bmlen = be32_to_cpup(p);
3534         p = xdr_inline_decode(xdr, bmlen << 2);
3535         if (likely(p))
3536                 return 0;
3537 out_overflow:
3538         print_overflow_msg(__func__, xdr);
3539         return -EIO;
3540 }
3541
3542 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3543 {
3544         __be32 *savep;
3545         uint32_t attrlen, bitmap[2] = {0};
3546         int status;
3547
3548         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3549                 goto xdr_error;
3550         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3551                 goto xdr_error;
3552         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3553                 goto xdr_error;
3554         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3555                 goto xdr_error;
3556         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3557                 goto xdr_error;
3558         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3559                 goto xdr_error;
3560         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3561                 goto xdr_error;
3562         status = verify_attr_len(xdr, savep, attrlen);
3563 xdr_error:
3564         dprintk("%s: xdr returned %d!\n", __func__, -status);
3565         return status;
3566 }
3567
3568 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3569 {
3570         __be32 *savep;
3571         uint32_t attrlen, bitmap[2] = {0};
3572         int status;
3573
3574         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3575                 goto xdr_error;
3576         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3577                 goto xdr_error;
3578         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3579                 goto xdr_error;
3580
3581         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3582                 goto xdr_error;
3583         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3584                 goto xdr_error;
3585         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3586                 goto xdr_error;
3587         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3588                 goto xdr_error;
3589         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3590                 goto xdr_error;
3591         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3592                 goto xdr_error;
3593
3594         status = verify_attr_len(xdr, savep, attrlen);
3595 xdr_error:
3596         dprintk("%s: xdr returned %d!\n", __func__, -status);
3597         return status;
3598 }
3599
3600 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3601 {
3602         __be32 *savep;
3603         uint32_t attrlen, bitmap[2] = {0};
3604         int status;
3605
3606         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3607                 goto xdr_error;
3608         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3609                 goto xdr_error;
3610         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3611                 goto xdr_error;
3612
3613         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3614                 goto xdr_error;
3615         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3616                 goto xdr_error;
3617
3618         status = verify_attr_len(xdr, savep, attrlen);
3619 xdr_error:
3620         dprintk("%s: xdr returned %d!\n", __func__, -status);
3621         return status;
3622 }
3623
3624 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3625                 const struct nfs_server *server, int may_sleep)
3626 {
3627         __be32 *savep;
3628         uint32_t attrlen,
3629                  bitmap[2] = {0},
3630                  type;
3631         int status;
3632         umode_t fmode = 0;
3633         uint64_t fileid;
3634
3635         status = decode_op_hdr(xdr, OP_GETATTR);
3636         if (status < 0)
3637                 goto xdr_error;
3638
3639         status = decode_attr_bitmap(xdr, bitmap);
3640         if (status < 0)
3641                 goto xdr_error;
3642
3643         status = decode_attr_length(xdr, &attrlen, &savep);
3644         if (status < 0)
3645                 goto xdr_error;
3646
3647
3648         status = decode_attr_type(xdr, bitmap, &type);
3649         if (status < 0)
3650                 goto xdr_error;
3651         fattr->mode = 0;
3652         if (status != 0) {
3653                 fattr->mode |= nfs_type2fmt[type];
3654                 fattr->valid |= status;
3655         }
3656
3657         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3658         if (status < 0)
3659                 goto xdr_error;
3660         fattr->valid |= status;
3661
3662         status = decode_attr_size(xdr, bitmap, &fattr->size);
3663         if (status < 0)
3664                 goto xdr_error;
3665         fattr->valid |= status;
3666
3667         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3668         if (status < 0)
3669                 goto xdr_error;
3670         fattr->valid |= status;
3671
3672         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3673         if (status < 0)
3674                 goto xdr_error;
3675         fattr->valid |= status;
3676
3677         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3678                                                 struct nfs4_fs_locations,
3679                                                 fattr));
3680         if (status < 0)
3681                 goto xdr_error;
3682         fattr->valid |= status;
3683
3684         status = decode_attr_mode(xdr, bitmap, &fmode);
3685         if (status < 0)
3686                 goto xdr_error;
3687         if (status != 0) {
3688                 fattr->mode |= fmode;
3689                 fattr->valid |= status;
3690         }
3691
3692         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3693         if (status < 0)
3694                 goto xdr_error;
3695         fattr->valid |= status;
3696
3697         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3698                         &fattr->uid, may_sleep);
3699         if (status < 0)
3700                 goto xdr_error;
3701         fattr->valid |= status;
3702
3703         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3704                         &fattr->gid, may_sleep);
3705         if (status < 0)
3706                 goto xdr_error;
3707         fattr->valid |= status;
3708
3709         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3710         if (status < 0)
3711                 goto xdr_error;
3712         fattr->valid |= status;
3713
3714         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3715         if (status < 0)
3716                 goto xdr_error;
3717         fattr->valid |= status;
3718
3719         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3720         if (status < 0)
3721                 goto xdr_error;
3722         fattr->valid |= status;
3723
3724         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3725         if (status < 0)
3726                 goto xdr_error;
3727         fattr->valid |= status;
3728
3729         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3730         if (status < 0)
3731                 goto xdr_error;
3732         fattr->valid |= status;
3733
3734         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3735         if (status < 0)
3736                 goto xdr_error;
3737         if (status != 0 && !(fattr->valid & status)) {
3738                 fattr->fileid = fileid;
3739                 fattr->valid |= status;
3740         }
3741
3742         status = verify_attr_len(xdr, savep, attrlen);
3743 xdr_error:
3744         dprintk("%s: xdr returned %d\n", __func__, -status);
3745         return status;
3746 }
3747
3748
3749 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3750 {
3751         __be32 *savep;
3752         uint32_t attrlen, bitmap[2];
3753         int status;
3754
3755         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3756                 goto xdr_error;
3757         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3758                 goto xdr_error;
3759         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3760                 goto xdr_error;
3761
3762         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3763
3764         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3765                 goto xdr_error;
3766         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3767                 goto xdr_error;
3768         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3769                 goto xdr_error;
3770         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3771         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3772                 goto xdr_error;
3773         fsinfo->wtpref = fsinfo->wtmax;
3774
3775         status = verify_attr_len(xdr, savep, attrlen);
3776 xdr_error:
3777         dprintk("%s: xdr returned %d!\n", __func__, -status);
3778         return status;
3779 }
3780
3781 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3782 {
3783         __be32 *p;
3784         uint32_t len;
3785         int status;
3786
3787         /* Zero handle first to allow comparisons */
3788         memset(fh, 0, sizeof(*fh));
3789
3790         status = decode_op_hdr(xdr, OP_GETFH);
3791         if (status)
3792                 return status;
3793
3794         p = xdr_inline_decode(xdr, 4);
3795         if (unlikely(!p))
3796                 goto out_overflow;
3797         len = be32_to_cpup(p);
3798         if (len > NFS4_FHSIZE)
3799                 return -EIO;
3800         fh->size = len;
3801         p = xdr_inline_decode(xdr, len);
3802         if (unlikely(!p))
3803                 goto out_overflow;
3804         memcpy(fh->data, p, len);
3805         return 0;
3806 out_overflow:
3807         print_overflow_msg(__func__, xdr);
3808         return -EIO;
3809 }
3810
3811 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3812 {
3813         int status;
3814
3815         status = decode_op_hdr(xdr, OP_LINK);
3816         if (status)
3817                 return status;
3818         return decode_change_info(xdr, cinfo);
3819 }
3820
3821 /*
3822  * We create the owner, so we know a proper owner.id length is 4.
3823  */
3824 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3825 {
3826         uint64_t offset, length, clientid;
3827         __be32 *p;
3828         uint32_t namelen, type;
3829
3830         p = xdr_inline_decode(xdr, 32);
3831         if (unlikely(!p))
3832                 goto out_overflow;
3833         p = xdr_decode_hyper(p, &offset);
3834         p = xdr_decode_hyper(p, &length);
3835         type = be32_to_cpup(p++);
3836         if (fl != NULL) {
3837                 fl->fl_start = (loff_t)offset;
3838                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3839                 if (length == ~(uint64_t)0)
3840                         fl->fl_end = OFFSET_MAX;
3841                 fl->fl_type = F_WRLCK;
3842                 if (type & 1)
3843                         fl->fl_type = F_RDLCK;
3844                 fl->fl_pid = 0;
3845         }
3846         p = xdr_decode_hyper(p, &clientid);
3847         namelen = be32_to_cpup(p);
3848         p = xdr_inline_decode(xdr, namelen);
3849         if (likely(p))
3850                 return -NFS4ERR_DENIED;
3851 out_overflow:
3852         print_overflow_msg(__func__, xdr);
3853         return -EIO;
3854 }
3855
3856 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3857 {
3858         int status;
3859
3860         status = decode_op_hdr(xdr, OP_LOCK);
3861         if (status == -EIO)
3862                 goto out;
3863         if (status == 0) {
3864                 status = decode_stateid(xdr, &res->stateid);
3865                 if (unlikely(status))
3866                         goto out;
3867         } else if (status == -NFS4ERR_DENIED)
3868                 status = decode_lock_denied(xdr, NULL);
3869         if (res->open_seqid != NULL)
3870                 nfs_increment_open_seqid(status, res->open_seqid);
3871         nfs_increment_lock_seqid(status, res->lock_seqid);
3872 out:
3873         return status;
3874 }
3875
3876 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3877 {
3878         int status;
3879         status = decode_op_hdr(xdr, OP_LOCKT);
3880         if (status == -NFS4ERR_DENIED)
3881                 return decode_lock_denied(xdr, res->denied);
3882         return status;
3883 }
3884
3885 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3886 {
3887         int status;
3888
3889         status = decode_op_hdr(xdr, OP_LOCKU);
3890         if (status != -EIO)
3891                 nfs_increment_lock_seqid(status, res->seqid);
3892         if (status == 0)
3893                 status = decode_stateid(xdr, &res->stateid);
3894         return status;
3895 }
3896
3897 static int decode_lookup(struct xdr_stream *xdr)
3898 {
3899         return decode_op_hdr(xdr, OP_LOOKUP);
3900 }
3901
3902 /* This is too sick! */
3903 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3904 {
3905         __be32 *p;
3906         uint32_t limit_type, nblocks, blocksize;
3907
3908         p = xdr_inline_decode(xdr, 12);
3909         if (unlikely(!p))
3910                 goto out_overflow;
3911         limit_type = be32_to_cpup(p++);
3912         switch (limit_type) {
3913         case 1:
3914                 xdr_decode_hyper(p, maxsize);
3915                 break;
3916         case 2:
3917                 nblocks = be32_to_cpup(p++);
3918                 blocksize = be32_to_cpup(p);
3919                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3920         }
3921         return 0;
3922 out_overflow:
3923         print_overflow_msg(__func__, xdr);
3924         return -EIO;
3925 }
3926
3927 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3928 {
3929         __be32 *p;
3930         uint32_t delegation_type;
3931         int status;
3932
3933         p = xdr_inline_decode(xdr, 4);
3934         if (unlikely(!p))
3935                 goto out_overflow;
3936         delegation_type = be32_to_cpup(p);
3937         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3938                 res->delegation_type = 0;
3939                 return 0;
3940         }
3941         status = decode_stateid(xdr, &res->delegation);
3942         if (unlikely(status))
3943                 return status;
3944         p = xdr_inline_decode(xdr, 4);
3945         if (unlikely(!p))
3946                 goto out_overflow;
3947         res->do_recall = be32_to_cpup(p);
3948
3949         switch (delegation_type) {
3950         case NFS4_OPEN_DELEGATE_READ:
3951                 res->delegation_type = FMODE_READ;
3952                 break;
3953         case NFS4_OPEN_DELEGATE_WRITE:
3954                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3955                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3956                                 return -EIO;
3957         }
3958         return decode_ace(xdr, NULL, res->server->nfs_client);
3959 out_overflow:
3960         print_overflow_msg(__func__, xdr);
3961         return -EIO;
3962 }
3963
3964 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3965 {
3966         __be32 *p;
3967         uint32_t savewords, bmlen, i;
3968         int status;
3969
3970         status = decode_op_hdr(xdr, OP_OPEN);
3971         if (status != -EIO)
3972                 nfs_increment_open_seqid(status, res->seqid);
3973         if (!status)
3974                 status = decode_stateid(xdr, &res->stateid);
3975         if (unlikely(status))
3976                 return status;
3977
3978         decode_change_info(xdr, &res->cinfo);
3979
3980         p = xdr_inline_decode(xdr, 8);
3981         if (unlikely(!p))
3982                 goto out_overflow;
3983         res->rflags = be32_to_cpup(p++);
3984         bmlen = be32_to_cpup(p);
3985         if (bmlen > 10)
3986                 goto xdr_error;
3987
3988         p = xdr_inline_decode(xdr, bmlen << 2);
3989         if (unlikely(!p))
3990                 goto out_overflow;
3991         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3992         for (i = 0; i < savewords; ++i)
3993                 res->attrset[i] = be32_to_cpup(p++);
3994         for (; i < NFS4_BITMAP_SIZE; i++)
3995                 res->attrset[i] = 0;
3996
3997         return decode_delegation(xdr, res);
3998 xdr_error:
3999         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4000         return -EIO;
4001 out_overflow:
4002         print_overflow_msg(__func__, xdr);
4003         return -EIO;
4004 }
4005
4006 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4007 {
4008         int status;
4009
4010         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4011         if (status != -EIO)
4012                 nfs_increment_open_seqid(status, res->seqid);
4013         if (!status)
4014                 status = decode_stateid(xdr, &res->stateid);
4015         return status;
4016 }
4017
4018 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4019 {
4020         int status;
4021
4022         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4023         if (status != -EIO)
4024                 nfs_increment_open_seqid(status, res->seqid);
4025         if (!status)
4026                 status = decode_stateid(xdr, &res->stateid);
4027         return status;
4028 }
4029
4030 static int decode_putfh(struct xdr_stream *xdr)
4031 {
4032         return decode_op_hdr(xdr, OP_PUTFH);
4033 }
4034
4035 static int decode_putrootfh(struct xdr_stream *xdr)
4036 {
4037         return decode_op_hdr(xdr, OP_PUTROOTFH);
4038 }
4039
4040 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4041 {
4042         struct kvec *iov = req->rq_rcv_buf.head;
4043         __be32 *p;
4044         uint32_t count, eof, recvd, hdrlen;
4045         int status;
4046
4047         status = decode_op_hdr(xdr, OP_READ);
4048         if (status)
4049                 return status;
4050         p = xdr_inline_decode(xdr, 8);
4051         if (unlikely(!p))
4052                 goto out_overflow;
4053         eof = be32_to_cpup(p++);
4054         count = be32_to_cpup(p);
4055         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4056         recvd = req->rq_rcv_buf.len - hdrlen;
4057         if (count > recvd) {
4058                 dprintk("NFS: server cheating in read reply: "
4059                                 "count %u > recvd %u\n", count, recvd);
4060                 count = recvd;
4061                 eof = 0;
4062         }
4063         xdr_read_pages(xdr, count);
4064         res->eof = eof;
4065         res->count = count;
4066         return 0;
4067 out_overflow:
4068         print_overflow_msg(__func__, xdr);
4069         return -EIO;
4070 }
4071
4072 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4073 {
4074         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4075         struct page     *page = *rcvbuf->pages;
4076         struct kvec     *iov = rcvbuf->head;
4077         size_t          hdrlen;
4078         u32             recvd, pglen = rcvbuf->page_len;
4079         __be32          *end, *entry, *p, *kaddr;
4080         unsigned int    nr = 0;
4081         int             status;
4082
4083         status = decode_op_hdr(xdr, OP_READDIR);
4084         if (!status)
4085                 status = decode_verifier(xdr, readdir->verifier.data);
4086         if (unlikely(status))
4087                 return status;
4088         dprintk("%s: verifier = %08x:%08x\n",
4089                         __func__,
4090                         ((u32 *)readdir->verifier.data)[0],
4091                         ((u32 *)readdir->verifier.data)[1]);
4092
4093
4094         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4095         recvd = rcvbuf->len - hdrlen;
4096         if (pglen > recvd)
4097                 pglen = recvd;
4098         xdr_read_pages(xdr, pglen);
4099
4100         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4101         kaddr = p = kmap_atomic(page, KM_USER0);
4102         end = p + ((pglen + readdir->pgbase) >> 2);
4103         entry = p;
4104
4105         /* Make sure the packet actually has a value_follows and EOF entry */
4106         if ((entry + 1) > end)
4107                 goto short_pkt;
4108
4109         for (; *p++; nr++) {
4110                 u32 len, attrlen, xlen;
4111                 if (end - p < 3)
4112                         goto short_pkt;
4113                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4114                 p += 2;                 /* cookie */
4115                 len = ntohl(*p++);      /* filename length */
4116                 if (len > NFS4_MAXNAMLEN) {
4117                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4118                                         len);
4119                         goto err_unmap;
4120                 }
4121                 xlen = XDR_QUADLEN(len);
4122                 if (end - p < xlen + 1)
4123                         goto short_pkt;
4124                 dprintk("filename = %*s\n", len, (char *)p);
4125                 p += xlen;
4126                 len = ntohl(*p++);      /* bitmap length */
4127                 if (end - p < len + 1)
4128                         goto short_pkt;
4129                 p += len;
4130                 attrlen = XDR_QUADLEN(ntohl(*p++));
4131                 if (end - p < attrlen + 2)
4132                         goto short_pkt;
4133                 p += attrlen;           /* attributes */
4134                 entry = p;
4135         }
4136         /*
4137          * Apparently some server sends responses that are a valid size, but
4138          * contain no entries, and have value_follows==0 and EOF==0. For
4139          * those, just set the EOF marker.
4140          */
4141         if (!nr && entry[1] == 0) {
4142                 dprintk("NFS: readdir reply truncated!\n");
4143                 entry[1] = 1;
4144         }
4145 out:
4146         kunmap_atomic(kaddr, KM_USER0);
4147         return 0;
4148 short_pkt:
4149         /*
4150          * When we get a short packet there are 2 possibilities. We can
4151          * return an error, or fix up the response to look like a valid
4152          * response and return what we have so far. If there are no
4153          * entries and the packet was short, then return -EIO. If there
4154          * are valid entries in the response, return them and pretend that
4155          * the call was successful, but incomplete. The caller can retry the
4156          * readdir starting at the last cookie.
4157          */
4158         dprintk("%s: short packet at entry %d\n", __func__, nr);
4159         entry[0] = entry[1] = 0;
4160         if (nr)
4161                 goto out;
4162 err_unmap:
4163         kunmap_atomic(kaddr, KM_USER0);
4164         return -errno_NFSERR_IO;
4165 }
4166
4167 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4168 {
4169         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4170         struct kvec *iov = rcvbuf->head;
4171         size_t hdrlen;
4172         u32 len, recvd;
4173         __be32 *p;
4174         char *kaddr;
4175         int status;
4176
4177         status = decode_op_hdr(xdr, OP_READLINK);
4178         if (status)
4179                 return status;
4180
4181         /* Convert length of symlink */
4182         p = xdr_inline_decode(xdr, 4);
4183         if (unlikely(!p))
4184                 goto out_overflow;
4185         len = be32_to_cpup(p);
4186         if (len >= rcvbuf->page_len || len <= 0) {
4187                 dprintk("nfs: server returned giant symlink!\n");
4188                 return -ENAMETOOLONG;
4189         }
4190         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4191         recvd = req->rq_rcv_buf.len - hdrlen;
4192         if (recvd < len) {
4193                 dprintk("NFS: server cheating in readlink reply: "
4194                                 "count %u > recvd %u\n", len, recvd);
4195                 return -EIO;
4196         }
4197         xdr_read_pages(xdr, len);
4198         /*
4199          * The XDR encode routine has set things up so that
4200          * the link text will be copied directly into the
4201          * buffer.  We just have to do overflow-checking,
4202          * and and null-terminate the text (the VFS expects
4203          * null-termination).
4204          */
4205         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4206         kaddr[len+rcvbuf->page_base] = '\0';
4207         kunmap_atomic(kaddr, KM_USER0);
4208         return 0;
4209 out_overflow:
4210         print_overflow_msg(__func__, xdr);
4211         return -EIO;
4212 }
4213
4214 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4215 {
4216         int status;
4217
4218         status = decode_op_hdr(xdr, OP_REMOVE);
4219         if (status)
4220                 goto out;
4221         status = decode_change_info(xdr, cinfo);
4222 out:
4223         return status;
4224 }
4225
4226 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4227               struct nfs4_change_info *new_cinfo)
4228 {
4229         int status;
4230
4231         status = decode_op_hdr(xdr, OP_RENAME);
4232         if (status)
4233                 goto out;
4234         if ((status = decode_change_info(xdr, old_cinfo)))
4235                 goto out;
4236         status = decode_change_info(xdr, new_cinfo);
4237 out:
4238         return status;
4239 }
4240
4241 static int decode_renew(struct xdr_stream *xdr)
4242 {
4243         return decode_op_hdr(xdr, OP_RENEW);
4244 }
4245
4246 static int
4247 decode_restorefh(struct xdr_stream *xdr)
4248 {
4249         return decode_op_hdr(xdr, OP_RESTOREFH);
4250 }
4251
4252 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4253                 size_t *acl_len)
4254 {
4255         __be32 *savep;
4256         uint32_t attrlen,
4257                  bitmap[2] = {0};
4258         struct kvec *iov = req->rq_rcv_buf.head;
4259         int status;
4260
4261         *acl_len = 0;
4262         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4263                 goto out;
4264         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4265                 goto out;
4266         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4267                 goto out;
4268
4269         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4270                 return -EIO;
4271         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4272                 size_t hdrlen;
4273                 u32 recvd;
4274
4275                 /* We ignore &savep and don't do consistency checks on
4276                  * the attr length.  Let userspace figure it out.... */
4277                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4278                 recvd = req->rq_rcv_buf.len - hdrlen;
4279                 if (attrlen > recvd) {
4280                         dprintk("NFS: server cheating in getattr"
4281                                         " acl reply: attrlen %u > recvd %u\n",
4282                                         attrlen, recvd);
4283                         return -EINVAL;
4284                 }
4285                 xdr_read_pages(xdr, attrlen);
4286                 *acl_len = attrlen;
4287         } else
4288                 status = -EOPNOTSUPP;
4289
4290 out:
4291         return status;
4292 }
4293
4294 static int
4295 decode_savefh(struct xdr_stream *xdr)
4296 {
4297         return decode_op_hdr(xdr, OP_SAVEFH);
4298 }
4299
4300 static int decode_setattr(struct xdr_stream *xdr)
4301 {
4302         __be32 *p;
4303         uint32_t bmlen;
4304         int status;
4305
4306         status = decode_op_hdr(xdr, OP_SETATTR);
4307         if (status)
4308                 return status;
4309         p = xdr_inline_decode(xdr, 4);
4310         if (unlikely(!p))
4311                 goto out_overflow;
4312         bmlen = be32_to_cpup(p);
4313         p = xdr_inline_decode(xdr, bmlen << 2);
4314         if (likely(p))
4315                 return 0;
4316 out_overflow:
4317         print_overflow_msg(__func__, xdr);
4318         return -EIO;
4319 }
4320
4321 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4322 {
4323         __be32 *p;
4324         uint32_t opnum;
4325         int32_t nfserr;
4326
4327         p = xdr_inline_decode(xdr, 8);
4328         if (unlikely(!p))
4329                 goto out_overflow;
4330         opnum = be32_to_cpup(p++);
4331         if (opnum != OP_SETCLIENTID) {
4332                 dprintk("nfs: decode_setclientid: Server returned operation"
4333                         " %d\n", opnum);
4334                 return -EIO;
4335         }
4336         nfserr = be32_to_cpup(p);
4337         if (nfserr == NFS_OK) {
4338                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4339                 if (unlikely(!p))
4340                         goto out_overflow;
4341                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4342                 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4343         } else if (nfserr == NFSERR_CLID_INUSE) {
4344                 uint32_t len;
4345
4346                 /* skip netid string */
4347                 p = xdr_inline_decode(xdr, 4);
4348                 if (unlikely(!p))
4349                         goto out_overflow;
4350                 len = be32_to_cpup(p);
4351                 p = xdr_inline_decode(xdr, len);
4352                 if (unlikely(!p))
4353                         goto out_overflow;
4354
4355                 /* skip uaddr string */
4356                 p = xdr_inline_decode(xdr, 4);
4357                 if (unlikely(!p))
4358                         goto out_overflow;
4359                 len = be32_to_cpup(p);
4360                 p = xdr_inline_decode(xdr, len);
4361                 if (unlikely(!p))
4362                         goto out_overflow;
4363                 return -NFSERR_CLID_INUSE;
4364         } else
4365                 return nfs4_stat_to_errno(nfserr);
4366
4367         return 0;
4368 out_overflow:
4369         print_overflow_msg(__func__, xdr);
4370         return -EIO;
4371 }
4372
4373 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4374 {
4375         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4376 }
4377
4378 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4379 {
4380         __be32 *p;
4381         int status;
4382
4383         status = decode_op_hdr(xdr, OP_WRITE);
4384         if (status)
4385                 return status;
4386
4387         p = xdr_inline_decode(xdr, 16);
4388         if (unlikely(!p))
4389                 goto out_overflow;
4390         res->count = be32_to_cpup(p++);
4391         res->verf->committed = be32_to_cpup(p++);
4392         memcpy(res->verf->verifier, p, 8);
4393         return 0;
4394 out_overflow:
4395         print_overflow_msg(__func__, xdr);
4396         return -EIO;
4397 }
4398
4399 static int decode_delegreturn(struct xdr_stream *xdr)
4400 {
4401         return decode_op_hdr(xdr, OP_DELEGRETURN);
4402 }
4403
4404 #if defined(CONFIG_NFS_V4_1)
4405 static int decode_exchange_id(struct xdr_stream *xdr,
4406                               struct nfs41_exchange_id_res *res)
4407 {
4408         __be32 *p;
4409         uint32_t dummy;
4410         char *dummy_str;
4411         int status;
4412         struct nfs_client *clp = res->client;
4413
4414         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4415         if (status)
4416                 return status;
4417
4418         p = xdr_inline_decode(xdr, 8);
4419         if (unlikely(!p))
4420                 goto out_overflow;
4421         xdr_decode_hyper(p, &clp->cl_ex_clid);
4422         p = xdr_inline_decode(xdr, 12);
4423         if (unlikely(!p))
4424                 goto out_overflow;
4425         clp->cl_seqid = be32_to_cpup(p++);
4426         clp->cl_exchange_flags = be32_to_cpup(p++);
4427
4428         /* We ask for SP4_NONE */
4429         dummy = be32_to_cpup(p);
4430         if (dummy != SP4_NONE)
4431                 return -EIO;
4432
4433         /* Throw away minor_id */
4434         p = xdr_inline_decode(xdr, 8);
4435         if (unlikely(!p))
4436                 goto out_overflow;
4437
4438         /* Throw away Major id */
4439         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4440         if (unlikely(status))
4441                 return status;
4442
4443         /* Throw away server_scope */
4444         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4445         if (unlikely(status))
4446                 return status;
4447
4448         /* Throw away Implementation id array */
4449         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4450         if (unlikely(status))
4451                 return status;
4452
4453         return 0;
4454 out_overflow:
4455         print_overflow_msg(__func__, xdr);
4456         return -EIO;
4457 }
4458
4459 static int decode_chan_attrs(struct xdr_stream *xdr,
4460                              struct nfs4_channel_attrs *attrs)
4461 {
4462         __be32 *p;
4463         u32 nr_attrs;
4464
4465         p = xdr_inline_decode(xdr, 28);
4466         if (unlikely(!p))
4467                 goto out_overflow;
4468         attrs->headerpadsz = be32_to_cpup(p++);
4469         attrs->max_rqst_sz = be32_to_cpup(p++);
4470         attrs->max_resp_sz = be32_to_cpup(p++);
4471         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4472         attrs->max_ops = be32_to_cpup(p++);
4473         attrs->max_reqs = be32_to_cpup(p++);
4474         nr_attrs = be32_to_cpup(p);
4475         if (unlikely(nr_attrs > 1)) {
4476                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4477                         __func__, nr_attrs);
4478                 return -EINVAL;
4479         }
4480         if (nr_attrs == 1) {
4481                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4482                 if (unlikely(!p))
4483                         goto out_overflow;
4484         }
4485         return 0;
4486 out_overflow:
4487         print_overflow_msg(__func__, xdr);
4488         return -EIO;
4489 }
4490
4491 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4492 {
4493         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4494 }
4495
4496 static int decode_create_session(struct xdr_stream *xdr,
4497                                  struct nfs41_create_session_res *res)
4498 {
4499         __be32 *p;
4500         int status;
4501         struct nfs_client *clp = res->client;
4502         struct nfs4_session *session = clp->cl_session;
4503
4504         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4505         if (!status)
4506                 status = decode_sessionid(xdr, &session->sess_id);
4507         if (unlikely(status))
4508                 return status;
4509
4510         /* seqid, flags */
4511         p = xdr_inline_decode(xdr, 8);
4512         if (unlikely(!p))
4513                 goto out_overflow;
4514         clp->cl_seqid = be32_to_cpup(p++);
4515         session->flags = be32_to_cpup(p);
4516
4517         /* Channel attributes */
4518         status = decode_chan_attrs(xdr, &session->fc_attrs);
4519         if (!status)
4520                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4521         return status;
4522 out_overflow:
4523         print_overflow_msg(__func__, xdr);
4524         return -EIO;
4525 }
4526
4527 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4528 {
4529         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4530 }
4531 #endif /* CONFIG_NFS_V4_1 */
4532
4533 static int decode_sequence(struct xdr_stream *xdr,
4534                            struct nfs4_sequence_res *res,
4535                            struct rpc_rqst *rqstp)
4536 {
4537 #if defined(CONFIG_NFS_V4_1)
4538         struct nfs4_slot *slot;
4539         struct nfs4_sessionid id;
4540         u32 dummy;
4541         int status;
4542         __be32 *p;
4543
4544         if (!res->sr_session)
4545                 return 0;
4546
4547         status = decode_op_hdr(xdr, OP_SEQUENCE);
4548         if (!status)
4549                 status = decode_sessionid(xdr, &id);
4550         if (unlikely(status))
4551                 goto out_err;
4552
4553         /*
4554          * If the server returns different values for sessionID, slotID or
4555          * sequence number, the server is looney tunes.
4556          */
4557         status = -ESERVERFAULT;
4558
4559         if (memcmp(id.data, res->sr_session->sess_id.data,
4560                    NFS4_MAX_SESSIONID_LEN)) {
4561                 dprintk("%s Invalid session id\n", __func__);
4562                 goto out_err;
4563         }
4564
4565         p = xdr_inline_decode(xdr, 20);
4566         if (unlikely(!p))
4567                 goto out_overflow;
4568
4569         /* seqid */
4570         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4571         dummy = be32_to_cpup(p++);
4572         if (dummy != slot->seq_nr) {
4573                 dprintk("%s Invalid sequence number\n", __func__);
4574                 goto out_err;
4575         }
4576         /* slot id */
4577         dummy = be32_to_cpup(p++);
4578         if (dummy != res->sr_slotid) {
4579                 dprintk("%s Invalid slot id\n", __func__);
4580                 goto out_err;
4581         }
4582         /* highest slot id - currently not processed */
4583         dummy = be32_to_cpup(p++);
4584         /* target highest slot id - currently not processed */
4585         dummy = be32_to_cpup(p++);
4586         /* result flags - currently not processed */
4587         dummy = be32_to_cpup(p);
4588         status = 0;
4589 out_err:
4590         res->sr_status = status;
4591         return status;
4592 out_overflow:
4593         print_overflow_msg(__func__, xdr);
4594         status = -EIO;
4595         goto out_err;
4596 #else  /* CONFIG_NFS_V4_1 */
4597         return 0;
4598 #endif /* CONFIG_NFS_V4_1 */
4599 }
4600
4601 /*
4602  * END OF "GENERIC" DECODE ROUTINES.
4603  */
4604
4605 /*
4606  * Decode OPEN_DOWNGRADE response
4607  */
4608 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4609 {
4610         struct xdr_stream xdr;
4611         struct compound_hdr hdr;
4612         int status;
4613
4614         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4615         status = decode_compound_hdr(&xdr, &hdr);
4616         if (status)
4617                 goto out;
4618         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4619         if (status)
4620                 goto out;
4621         status = decode_putfh(&xdr);
4622         if (status)
4623                 goto out;
4624         status = decode_open_downgrade(&xdr, res);
4625         if (status != 0)
4626                 goto out;
4627         decode_getfattr(&xdr, res->fattr, res->server,
4628                         !RPC_IS_ASYNC(rqstp->rq_task));
4629 out:
4630         return status;
4631 }
4632
4633 /*
4634  * Decode ACCESS response
4635  */
4636 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4637 {
4638         struct xdr_stream xdr;
4639         struct compound_hdr hdr;
4640         int status;
4641
4642         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4643         status = decode_compound_hdr(&xdr, &hdr);
4644         if (status)
4645                 goto out;
4646         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4647         if (status)
4648                 goto out;
4649         status = decode_putfh(&xdr);
4650         if (status != 0)
4651                 goto out;
4652         status = decode_access(&xdr, res);
4653         if (status != 0)
4654                 goto out;
4655         decode_getfattr(&xdr, res->fattr, res->server,
4656                         !RPC_IS_ASYNC(rqstp->rq_task));
4657 out:
4658         return status;
4659 }
4660
4661 /*
4662  * Decode LOOKUP response
4663  */
4664 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4665 {
4666         struct xdr_stream xdr;
4667         struct compound_hdr hdr;
4668         int status;
4669
4670         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4671         status = decode_compound_hdr(&xdr, &hdr);
4672         if (status)
4673                 goto out;
4674         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4675         if (status)
4676                 goto out;
4677         if ((status = decode_putfh(&xdr)) != 0)
4678                 goto out;
4679         if ((status = decode_lookup(&xdr)) != 0)
4680                 goto out;
4681         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4682                 goto out;
4683         status = decode_getfattr(&xdr, res->fattr, res->server
4684                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4685 out:
4686         return status;
4687 }
4688
4689 /*
4690  * Decode LOOKUP_ROOT response
4691  */
4692 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4693 {
4694         struct xdr_stream xdr;
4695         struct compound_hdr hdr;
4696         int status;
4697
4698         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4699         status = decode_compound_hdr(&xdr, &hdr);
4700         if (status)
4701                 goto out;
4702         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4703         if (status)
4704                 goto out;
4705         if ((status = decode_putrootfh(&xdr)) != 0)
4706                 goto out;
4707         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4708                 status = decode_getfattr(&xdr, res->fattr, res->server,
4709                                 !RPC_IS_ASYNC(rqstp->rq_task));
4710 out:
4711         return status;
4712 }
4713
4714 /*
4715  * Decode REMOVE response
4716  */
4717 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4718 {
4719         struct xdr_stream xdr;
4720         struct compound_hdr hdr;
4721         int status;
4722
4723         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4724         status = decode_compound_hdr(&xdr, &hdr);
4725         if (status)
4726                 goto out;
4727         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4728         if (status)
4729                 goto out;
4730         if ((status = decode_putfh(&xdr)) != 0)
4731                 goto out;
4732         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4733                 goto out;
4734         decode_getfattr(&xdr, &res->dir_attr, res->server,
4735                         !RPC_IS_ASYNC(rqstp->rq_task));
4736 out:
4737         return status;
4738 }
4739
4740 /*
4741  * Decode RENAME response
4742  */
4743 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4744 {
4745         struct xdr_stream xdr;
4746         struct compound_hdr hdr;
4747         int status;
4748
4749         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4750         status = decode_compound_hdr(&xdr, &hdr);
4751         if (status)
4752                 goto out;
4753         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4754         if (status)
4755                 goto out;
4756         if ((status = decode_putfh(&xdr)) != 0)
4757                 goto out;
4758         if ((status = decode_savefh(&xdr)) != 0)
4759                 goto out;
4760         if ((status = decode_putfh(&xdr)) != 0)
4761                 goto out;
4762         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4763                 goto out;
4764         /* Current FH is target directory */
4765         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4766                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4767                 goto out;
4768         if ((status = decode_restorefh(&xdr)) != 0)
4769                 goto out;
4770         decode_getfattr(&xdr, res->old_fattr, res->server,
4771                         !RPC_IS_ASYNC(rqstp->rq_task));
4772 out:
4773         return status;
4774 }
4775
4776 /*
4777  * Decode LINK response
4778  */
4779 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4780 {
4781         struct xdr_stream xdr;
4782         struct compound_hdr hdr;
4783         int status;
4784
4785         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4786         status = decode_compound_hdr(&xdr, &hdr);
4787         if (status)
4788                 goto out;
4789         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4790         if (status)
4791                 goto out;
4792         if ((status = decode_putfh(&xdr)) != 0)
4793                 goto out;
4794         if ((status = decode_savefh(&xdr)) != 0)
4795                 goto out;
4796         if ((status = decode_putfh(&xdr)) != 0)
4797                 goto out;
4798         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4799                 goto out;
4800         /*
4801          * Note order: OP_LINK leaves the directory as the current
4802          *             filehandle.
4803          */
4804         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4805                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4806                 goto out;
4807         if ((status = decode_restorefh(&xdr)) != 0)
4808                 goto out;
4809         decode_getfattr(&xdr, res->fattr, res->server,
4810                         !RPC_IS_ASYNC(rqstp->rq_task));
4811 out:
4812         return status;
4813 }
4814
4815 /*
4816  * Decode CREATE response
4817  */
4818 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4819 {
4820         struct xdr_stream xdr;
4821         struct compound_hdr hdr;
4822         int status;
4823
4824         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4825         status = decode_compound_hdr(&xdr, &hdr);
4826         if (status)
4827                 goto out;
4828         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4829         if (status)
4830                 goto out;
4831         if ((status = decode_putfh(&xdr)) != 0)
4832                 goto out;
4833         if ((status = decode_savefh(&xdr)) != 0)
4834                 goto out;
4835         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4836                 goto out;
4837         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4838                 goto out;
4839         if (decode_getfattr(&xdr, res->fattr, res->server,
4840                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4841                 goto out;
4842         if ((status = decode_restorefh(&xdr)) != 0)
4843                 goto out;
4844         decode_getfattr(&xdr, res->dir_fattr, res->server,
4845                         !RPC_IS_ASYNC(rqstp->rq_task));
4846 out:
4847         return status;
4848 }
4849
4850 /*
4851  * Decode SYMLINK response
4852  */
4853 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4854 {
4855         return nfs4_xdr_dec_create(rqstp, p, res);
4856 }
4857
4858 /*
4859  * Decode GETATTR response
4860  */
4861 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4862 {
4863         struct xdr_stream xdr;
4864         struct compound_hdr hdr;
4865         int status;
4866
4867         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4868         status = decode_compound_hdr(&xdr, &hdr);
4869         if (status)
4870                 goto out;
4871         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4872         if (status)
4873                 goto out;
4874         status = decode_putfh(&xdr);
4875         if (status)
4876                 goto out;
4877         status = decode_getfattr(&xdr, res->fattr, res->server,
4878                         !RPC_IS_ASYNC(rqstp->rq_task));
4879 out:
4880         return status;
4881 }
4882
4883 /*
4884  * Encode an SETACL request
4885  */
4886 static int
4887 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4888 {
4889         struct xdr_stream xdr;
4890         struct compound_hdr hdr = {
4891                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4892         };
4893         int status;
4894
4895         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4896         encode_compound_hdr(&xdr, req, &hdr);
4897         encode_sequence(&xdr, &args->seq_args, &hdr);
4898         encode_putfh(&xdr, args->fh, &hdr);
4899         status = encode_setacl(&xdr, args, &hdr);
4900         encode_nops(&hdr);
4901         return status;
4902 }
4903
4904 /*
4905  * Decode SETACL response
4906  */
4907 static int
4908 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4909                     struct nfs_setaclres *res)
4910 {
4911         struct xdr_stream xdr;
4912         struct compound_hdr hdr;
4913         int status;
4914
4915         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4916         status = decode_compound_hdr(&xdr, &hdr);
4917         if (status)
4918                 goto out;
4919         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4920         if (status)
4921                 goto out;
4922         status = decode_putfh(&xdr);
4923         if (status)
4924                 goto out;
4925         status = decode_setattr(&xdr);
4926 out:
4927         return status;
4928 }
4929
4930 /*
4931  * Decode GETACL response
4932  */
4933 static int
4934 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4935                     struct nfs_getaclres *res)
4936 {
4937         struct xdr_stream xdr;
4938         struct compound_hdr hdr;
4939         int status;
4940
4941         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4942         status = decode_compound_hdr(&xdr, &hdr);
4943         if (status)
4944                 goto out;
4945         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4946         if (status)
4947                 goto out;
4948         status = decode_putfh(&xdr);
4949         if (status)
4950                 goto out;
4951         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4952
4953 out:
4954         return status;
4955 }
4956
4957 /*
4958  * Decode CLOSE response
4959  */
4960 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4961 {
4962         struct xdr_stream xdr;
4963         struct compound_hdr hdr;
4964         int status;
4965
4966         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4967         status = decode_compound_hdr(&xdr, &hdr);
4968         if (status)
4969                 goto out;
4970         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4971         if (status)
4972                 goto out;
4973         status = decode_putfh(&xdr);
4974         if (status)
4975                 goto out;
4976         status = decode_close(&xdr, res);
4977         if (status != 0)
4978                 goto out;
4979         /*
4980          * Note: Server may do delete on close for this file
4981          *      in which case the getattr call will fail with
4982          *      an ESTALE error. Shouldn't be a problem,
4983          *      though, since fattr->valid will remain unset.
4984          */
4985         decode_getfattr(&xdr, res->fattr, res->server,
4986                         !RPC_IS_ASYNC(rqstp->rq_task));
4987 out:
4988         return status;
4989 }
4990
4991 /*
4992  * Decode OPEN response
4993  */
4994 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4995 {
4996         struct xdr_stream xdr;
4997         struct compound_hdr hdr;
4998         int status;
4999
5000         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5001         status = decode_compound_hdr(&xdr, &hdr);
5002         if (status)
5003                 goto out;
5004         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5005         if (status)
5006                 goto out;
5007         status = decode_putfh(&xdr);
5008         if (status)
5009                 goto out;
5010         status = decode_savefh(&xdr);
5011         if (status)
5012                 goto out;
5013         status = decode_open(&xdr, res);
5014         if (status)
5015                 goto out;
5016         if (decode_getfh(&xdr, &res->fh) != 0)
5017                 goto out;
5018         if (decode_getfattr(&xdr, res->f_attr, res->server,
5019                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5020                 goto out;
5021         if (decode_restorefh(&xdr) != 0)
5022                 goto out;
5023         decode_getfattr(&xdr, res->dir_attr, res->server,
5024                         !RPC_IS_ASYNC(rqstp->rq_task));
5025 out:
5026         return status;
5027 }
5028
5029 /*
5030  * Decode OPEN_CONFIRM response
5031  */
5032 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5033 {
5034         struct xdr_stream xdr;
5035         struct compound_hdr hdr;
5036         int status;
5037
5038         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5039         status = decode_compound_hdr(&xdr, &hdr);
5040         if (status)
5041                 goto out;
5042         status = decode_putfh(&xdr);
5043         if (status)
5044                 goto out;
5045         status = decode_open_confirm(&xdr, res);
5046 out:
5047         return status;
5048 }
5049
5050 /*
5051  * Decode OPEN response
5052  */
5053 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5054 {
5055         struct xdr_stream xdr;
5056         struct compound_hdr hdr;
5057         int status;
5058
5059         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5060         status = decode_compound_hdr(&xdr, &hdr);
5061         if (status)
5062                 goto out;
5063         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5064         if (status)
5065                 goto out;
5066         status = decode_putfh(&xdr);
5067         if (status)
5068                 goto out;
5069         status = decode_open(&xdr, res);
5070         if (status)
5071                 goto out;
5072         decode_getfattr(&xdr, res->f_attr, res->server,
5073                         !RPC_IS_ASYNC(rqstp->rq_task));
5074 out:
5075         return status;
5076 }
5077
5078 /*
5079  * Decode SETATTR response
5080  */
5081 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5082 {
5083         struct xdr_stream xdr;
5084         struct compound_hdr hdr;
5085         int status;
5086
5087         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5088         status = decode_compound_hdr(&xdr, &hdr);
5089         if (status)
5090                 goto out;
5091         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5092         if (status)
5093                 goto out;
5094         status = decode_putfh(&xdr);
5095         if (status)
5096                 goto out;
5097         status = decode_setattr(&xdr);
5098         if (status)
5099                 goto out;
5100         decode_getfattr(&xdr, res->fattr, res->server,
5101                         !RPC_IS_ASYNC(rqstp->rq_task));
5102 out:
5103         return status;
5104 }
5105
5106 /*
5107  * Decode LOCK response
5108  */
5109 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5110 {
5111         struct xdr_stream xdr;
5112         struct compound_hdr hdr;
5113         int status;
5114
5115         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5116         status = decode_compound_hdr(&xdr, &hdr);
5117         if (status)
5118                 goto out;
5119         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5120         if (status)
5121                 goto out;
5122         status = decode_putfh(&xdr);
5123         if (status)
5124                 goto out;
5125         status = decode_lock(&xdr, res);
5126 out:
5127         return status;
5128 }
5129
5130 /*
5131  * Decode LOCKT response
5132  */
5133 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5134 {
5135         struct xdr_stream xdr;
5136         struct compound_hdr hdr;
5137         int status;
5138
5139         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5140         status = decode_compound_hdr(&xdr, &hdr);
5141         if (status)
5142                 goto out;
5143         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5144         if (status)
5145                 goto out;
5146         status = decode_putfh(&xdr);
5147         if (status)
5148                 goto out;
5149         status = decode_lockt(&xdr, res);
5150 out:
5151         return status;
5152 }
5153
5154 /*
5155  * Decode LOCKU response
5156  */
5157 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5158 {
5159         struct xdr_stream xdr;
5160         struct compound_hdr hdr;
5161         int status;
5162
5163         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5164         status = decode_compound_hdr(&xdr, &hdr);
5165         if (status)
5166                 goto out;
5167         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5168         if (status)
5169                 goto out;
5170         status = decode_putfh(&xdr);
5171         if (status)
5172                 goto out;
5173         status = decode_locku(&xdr, res);
5174 out:
5175         return status;
5176 }
5177
5178 /*
5179  * Decode READLINK response
5180  */
5181 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5182                                  struct nfs4_readlink_res *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                 goto out;
5192         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5193         if (status)
5194                 goto out;
5195         status = decode_putfh(&xdr);
5196         if (status)
5197                 goto out;
5198         status = decode_readlink(&xdr, rqstp);
5199 out:
5200         return status;
5201 }
5202
5203 /*
5204  * Decode READDIR response
5205  */
5206 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5207 {
5208         struct xdr_stream xdr;
5209         struct compound_hdr hdr;
5210         int status;
5211
5212         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5213         status = decode_compound_hdr(&xdr, &hdr);
5214         if (status)
5215                 goto out;
5216         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5217         if (status)
5218                 goto out;
5219         status = decode_putfh(&xdr);
5220         if (status)
5221                 goto out;
5222         status = decode_readdir(&xdr, rqstp, res);
5223 out:
5224         return status;
5225 }
5226
5227 /*
5228  * Decode Read response
5229  */
5230 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5231 {
5232         struct xdr_stream xdr;
5233         struct compound_hdr hdr;
5234         int status;
5235
5236         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5237         status = decode_compound_hdr(&xdr, &hdr);
5238         if (status)
5239                 goto out;
5240         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5241         if (status)
5242                 goto out;
5243         status = decode_putfh(&xdr);
5244         if (status)
5245                 goto out;
5246         status = decode_read(&xdr, rqstp, res);
5247         if (!status)
5248                 status = res->count;
5249 out:
5250         return status;
5251 }
5252
5253 /*
5254  * Decode WRITE response
5255  */
5256 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5257 {
5258         struct xdr_stream xdr;
5259         struct compound_hdr hdr;
5260         int status;
5261
5262         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5263         status = decode_compound_hdr(&xdr, &hdr);
5264         if (status)
5265                 goto out;
5266         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5267         if (status)
5268                 goto out;
5269         status = decode_putfh(&xdr);
5270         if (status)
5271                 goto out;
5272         status = decode_write(&xdr, res);
5273         if (status)
5274                 goto out;
5275         decode_getfattr(&xdr, res->fattr, res->server,
5276                         !RPC_IS_ASYNC(rqstp->rq_task));
5277         if (!status)
5278                 status = res->count;
5279 out:
5280         return status;
5281 }
5282
5283 /*
5284  * Decode COMMIT response
5285  */
5286 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5287 {
5288         struct xdr_stream xdr;
5289         struct compound_hdr hdr;
5290         int status;
5291
5292         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5293         status = decode_compound_hdr(&xdr, &hdr);
5294         if (status)
5295                 goto out;
5296         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5297         if (status)
5298                 goto out;
5299         status = decode_putfh(&xdr);
5300         if (status)
5301                 goto out;
5302         status = decode_commit(&xdr, res);
5303         if (status)
5304                 goto out;
5305         decode_getfattr(&xdr, res->fattr, res->server,
5306                         !RPC_IS_ASYNC(rqstp->rq_task));
5307 out:
5308         return status;
5309 }
5310
5311 /*
5312  * FSINFO request
5313  */
5314 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5315                                struct nfs4_fsinfo_res *res)
5316 {
5317         struct xdr_stream xdr;
5318         struct compound_hdr hdr;
5319         int status;
5320
5321         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5322         status = decode_compound_hdr(&xdr, &hdr);
5323         if (!status)
5324                 status = decode_sequence(&xdr, &res->seq_res, req);
5325         if (!status)
5326                 status = decode_putfh(&xdr);
5327         if (!status)
5328                 status = decode_fsinfo(&xdr, res->fsinfo);
5329         return status;
5330 }
5331
5332 /*
5333  * PATHCONF request
5334  */
5335 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5336                                  struct nfs4_pathconf_res *res)
5337 {
5338         struct xdr_stream xdr;
5339         struct compound_hdr hdr;
5340         int status;
5341
5342         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5343         status = decode_compound_hdr(&xdr, &hdr);
5344         if (!status)
5345                 status = decode_sequence(&xdr, &res->seq_res, req);
5346         if (!status)
5347                 status = decode_putfh(&xdr);
5348         if (!status)
5349                 status = decode_pathconf(&xdr, res->pathconf);
5350         return status;
5351 }
5352
5353 /*
5354  * STATFS request
5355  */
5356 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5357                                struct nfs4_statfs_res *res)
5358 {
5359         struct xdr_stream xdr;
5360         struct compound_hdr hdr;
5361         int status;
5362
5363         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5364         status = decode_compound_hdr(&xdr, &hdr);
5365         if (!status)
5366                 status = decode_sequence(&xdr, &res->seq_res, req);
5367         if (!status)
5368                 status = decode_putfh(&xdr);
5369         if (!status)
5370                 status = decode_statfs(&xdr, res->fsstat);
5371         return status;
5372 }
5373
5374 /*
5375  * GETATTR_BITMAP request
5376  */
5377 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5378 {
5379         struct xdr_stream xdr;
5380         struct compound_hdr hdr;
5381         int status;
5382
5383         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5384         status = decode_compound_hdr(&xdr, &hdr);
5385         if (status)
5386                 goto out;
5387         status = decode_sequence(&xdr, &res->seq_res, req);
5388         if (status)
5389                 goto out;
5390         if ((status = decode_putfh(&xdr)) != 0)
5391                 goto out;
5392         status = decode_server_caps(&xdr, res);
5393 out:
5394         return status;
5395 }
5396
5397 /*
5398  * Decode RENEW response
5399  */
5400 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5401 {
5402         struct xdr_stream xdr;
5403         struct compound_hdr hdr;
5404         int status;
5405
5406         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5407         status = decode_compound_hdr(&xdr, &hdr);
5408         if (!status)
5409                 status = decode_renew(&xdr);
5410         return status;
5411 }
5412
5413 /*
5414  * a SETCLIENTID request
5415  */
5416 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5417                 struct nfs_client *clp)
5418 {
5419         struct xdr_stream xdr;
5420         struct compound_hdr hdr;
5421         int status;
5422
5423         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5424         status = decode_compound_hdr(&xdr, &hdr);
5425         if (!status)
5426                 status = decode_setclientid(&xdr, clp);
5427         return status;
5428 }
5429
5430 /*
5431  * a SETCLIENTID_CONFIRM request
5432  */
5433 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5434 {
5435         struct xdr_stream xdr;
5436         struct compound_hdr hdr;
5437         int status;
5438
5439         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5440         status = decode_compound_hdr(&xdr, &hdr);
5441         if (!status)
5442                 status = decode_setclientid_confirm(&xdr);
5443         if (!status)
5444                 status = decode_putrootfh(&xdr);
5445         if (!status)
5446                 status = decode_fsinfo(&xdr, fsinfo);
5447         return status;
5448 }
5449
5450 /*
5451  * DELEGRETURN request
5452  */
5453 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5454 {
5455         struct xdr_stream xdr;
5456         struct compound_hdr hdr;
5457         int status;
5458
5459         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5460         status = decode_compound_hdr(&xdr, &hdr);
5461         if (status)
5462                 goto out;
5463         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5464         if (status)
5465                 goto out;
5466         status = decode_putfh(&xdr);
5467         if (status != 0)
5468                 goto out;
5469         status = decode_delegreturn(&xdr);
5470         decode_getfattr(&xdr, res->fattr, res->server,
5471                         !RPC_IS_ASYNC(rqstp->rq_task));
5472 out:
5473         return status;
5474 }
5475
5476 /*
5477  * FS_LOCATIONS request
5478  */
5479 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5480                                      struct nfs4_fs_locations_res *res)
5481 {
5482         struct xdr_stream xdr;
5483         struct compound_hdr hdr;
5484         int status;
5485
5486         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5487         status = decode_compound_hdr(&xdr, &hdr);
5488         if (status)
5489                 goto out;
5490         status = decode_sequence(&xdr, &res->seq_res, req);
5491         if (status)
5492                 goto out;
5493         if ((status = decode_putfh(&xdr)) != 0)
5494                 goto out;
5495         if ((status = decode_lookup(&xdr)) != 0)
5496                 goto out;
5497         xdr_enter_page(&xdr, PAGE_SIZE);
5498         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5499                                  res->fs_locations->server,
5500                                  !RPC_IS_ASYNC(req->rq_task));
5501 out:
5502         return status;
5503 }
5504
5505 #if defined(CONFIG_NFS_V4_1)
5506 /*
5507  * EXCHANGE_ID request
5508  */
5509 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5510                                     void *res)
5511 {
5512         struct xdr_stream xdr;
5513         struct compound_hdr hdr;
5514         int status;
5515
5516         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5517         status = decode_compound_hdr(&xdr, &hdr);
5518         if (!status)
5519                 status = decode_exchange_id(&xdr, res);
5520         return status;
5521 }
5522
5523 /*
5524  * a CREATE_SESSION request
5525  */
5526 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5527                                        struct nfs41_create_session_res *res)
5528 {
5529         struct xdr_stream xdr;
5530         struct compound_hdr hdr;
5531         int status;
5532
5533         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5534         status = decode_compound_hdr(&xdr, &hdr);
5535         if (!status)
5536                 status = decode_create_session(&xdr, res);
5537         return status;
5538 }
5539
5540 /*
5541  * a DESTROY_SESSION request
5542  */
5543 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5544                                         void *dummy)
5545 {
5546         struct xdr_stream xdr;
5547         struct compound_hdr hdr;
5548         int status;
5549
5550         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5551         status = decode_compound_hdr(&xdr, &hdr);
5552         if (!status)
5553                 status = decode_destroy_session(&xdr, dummy);
5554         return status;
5555 }
5556
5557 /*
5558  * a SEQUENCE request
5559  */
5560 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5561                                  struct nfs4_sequence_res *res)
5562 {
5563         struct xdr_stream xdr;
5564         struct compound_hdr hdr;
5565         int status;
5566
5567         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5568         status = decode_compound_hdr(&xdr, &hdr);
5569         if (!status)
5570                 status = decode_sequence(&xdr, res, rqstp);
5571         return status;
5572 }
5573
5574 /*
5575  * a GET_LEASE_TIME request
5576  */
5577 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5578                                        struct nfs4_get_lease_time_res *res)
5579 {
5580         struct xdr_stream xdr;
5581         struct compound_hdr hdr;
5582         int status;
5583
5584         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5585         status = decode_compound_hdr(&xdr, &hdr);
5586         if (!status)
5587                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5588         if (!status)
5589                 status = decode_putrootfh(&xdr);
5590         if (!status)
5591                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5592         return status;
5593 }
5594 #endif /* CONFIG_NFS_V4_1 */
5595
5596 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5597 {
5598         uint32_t bitmap[2] = {0};
5599         uint32_t len;
5600
5601         if (!*p++) {
5602                 if (!*p)
5603                         return ERR_PTR(-EAGAIN);
5604                 entry->eof = 1;
5605                 return ERR_PTR(-EBADCOOKIE);
5606         }
5607
5608         entry->prev_cookie = entry->cookie;
5609         p = xdr_decode_hyper(p, &entry->cookie);
5610         entry->len = ntohl(*p++);
5611         entry->name = (const char *) p;
5612         p += XDR_QUADLEN(entry->len);
5613
5614         /*
5615          * In case the server doesn't return an inode number,
5616          * we fake one here.  (We don't use inode number 0,
5617          * since glibc seems to choke on it...)
5618          */
5619         entry->ino = 1;
5620
5621         len = ntohl(*p++);              /* bitmap length */
5622         if (len-- > 0) {
5623                 bitmap[0] = ntohl(*p++);
5624                 if (len-- > 0) {
5625                         bitmap[1] = ntohl(*p++);
5626                         p += len;
5627                 }
5628         }
5629         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5630         if (len > 0) {
5631                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5632                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5633                         /* Ignore the return value of rdattr_error for now */
5634                         p++;
5635                         len--;
5636                 }
5637                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5638                         xdr_decode_hyper(p, &entry->ino);
5639                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5640                         xdr_decode_hyper(p, &entry->ino);
5641                 p += len;
5642         }
5643
5644         entry->eof = !p[0] && p[1];
5645         return p;
5646 }
5647
5648 /*
5649  * We need to translate between nfs status return values and
5650  * the local errno values which may not be the same.
5651  */
5652 static struct {
5653         int stat;
5654         int errno;
5655 } nfs_errtbl[] = {
5656         { NFS4_OK,              0               },
5657         { NFS4ERR_PERM,         -EPERM          },
5658         { NFS4ERR_NOENT,        -ENOENT         },
5659         { NFS4ERR_IO,           -errno_NFSERR_IO},
5660         { NFS4ERR_NXIO,         -ENXIO          },
5661         { NFS4ERR_ACCESS,       -EACCES         },
5662         { NFS4ERR_EXIST,        -EEXIST         },
5663         { NFS4ERR_XDEV,         -EXDEV          },
5664         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5665         { NFS4ERR_ISDIR,        -EISDIR         },
5666         { NFS4ERR_INVAL,        -EINVAL         },
5667         { NFS4ERR_FBIG,         -EFBIG          },
5668         { NFS4ERR_NOSPC,        -ENOSPC         },
5669         { NFS4ERR_ROFS,         -EROFS          },
5670         { NFS4ERR_MLINK,        -EMLINK         },
5671         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5672         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5673         { NFS4ERR_DQUOT,        -EDQUOT         },
5674         { NFS4ERR_STALE,        -ESTALE         },
5675         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5676         { NFS4ERR_BADOWNER,     -EINVAL         },
5677         { NFS4ERR_BADNAME,      -EINVAL         },
5678         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5679         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5680         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5681         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5682         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5683         { NFS4ERR_LOCKED,       -EAGAIN         },
5684         { NFS4ERR_SYMLINK,      -ELOOP          },
5685         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5686         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5687         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5688                                                     * to be handled by a
5689                                                     * middle-layer.
5690                                                     */
5691         { -1,                   -EIO            }
5692 };
5693
5694 /*
5695  * Convert an NFS error code to a local one.
5696  * This one is used jointly by NFSv2 and NFSv3.
5697  */
5698 static int
5699 nfs4_stat_to_errno(int stat)
5700 {
5701         int i;
5702         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5703                 if (nfs_errtbl[i].stat == stat)
5704                         return nfs_errtbl[i].errno;
5705         }
5706         if (stat <= 10000 || stat > 10100) {
5707                 /* The server is looney tunes. */
5708                 return -ESERVERFAULT;
5709         }
5710         /* If we cannot translate the error, the recovery routines should
5711          * handle it.
5712          * Note: remaining NFSv4 error codes have values > 10000, so should
5713          * not conflict with native Linux error codes.
5714          */
5715         return -stat;
5716 }
5717
5718 #define PROC(proc, argtype, restype)                            \
5719 [NFSPROC4_CLNT_##proc] = {                                      \
5720         .p_proc   = NFSPROC4_COMPOUND,                          \
5721         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5722         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5723         .p_arglen = NFS4_##argtype##_sz,                        \
5724         .p_replen = NFS4_##restype##_sz,                        \
5725         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5726         .p_name   = #proc,                                      \
5727 }
5728
5729 struct rpc_procinfo     nfs4_procedures[] = {
5730   PROC(READ,            enc_read,       dec_read),
5731   PROC(WRITE,           enc_write,      dec_write),
5732   PROC(COMMIT,          enc_commit,     dec_commit),
5733   PROC(OPEN,            enc_open,       dec_open),
5734   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5735   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5736   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5737   PROC(CLOSE,           enc_close,      dec_close),
5738   PROC(SETATTR,         enc_setattr,    dec_setattr),
5739   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5740   PROC(RENEW,           enc_renew,      dec_renew),
5741   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5742   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5743   PROC(LOCK,            enc_lock,       dec_lock),
5744   PROC(LOCKT,           enc_lockt,      dec_lockt),
5745   PROC(LOCKU,           enc_locku,      dec_locku),
5746   PROC(ACCESS,          enc_access,     dec_access),
5747   PROC(GETATTR,         enc_getattr,    dec_getattr),
5748   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5749   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5750   PROC(REMOVE,          enc_remove,     dec_remove),
5751   PROC(RENAME,          enc_rename,     dec_rename),
5752   PROC(LINK,            enc_link,       dec_link),
5753   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5754   PROC(CREATE,          enc_create,     dec_create),
5755   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5756   PROC(STATFS,          enc_statfs,     dec_statfs),
5757   PROC(READLINK,        enc_readlink,   dec_readlink),
5758   PROC(READDIR,         enc_readdir,    dec_readdir),
5759   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5760   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5761   PROC(GETACL,          enc_getacl,     dec_getacl),
5762   PROC(SETACL,          enc_setacl,     dec_setacl),
5763   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5764 #if defined(CONFIG_NFS_V4_1)
5765   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5766   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5767   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5768   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5769   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5770 #endif /* CONFIG_NFS_V4_1 */
5771 };
5772
5773 struct rpc_version              nfs_version4 = {
5774         .number                 = 4,
5775         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5776         .procs                  = nfs4_procedures
5777 };
5778
5779 /*
5780  * Local variables:
5781  *  c-basic-offset: 8
5782  * End:
5783  */