fs/nfs/nfs4xdr.c

   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/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.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 #include "internal.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lockowner_maxsz  (7)
 206 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 207                                  7 + \
 208                                  1 + encode_stateid_maxsz + 1 + \
 209                                  encode_lockowner_maxsz)
 210 #define decode_lock_denied_maxsz \
 211                                 (8 + decode_lockowner_maxsz)
 212 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 213                                  decode_lock_denied_maxsz)
 214 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 215                                 encode_lockowner_maxsz)
 216 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 217                                  decode_lock_denied_maxsz)
 218 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 219                                  encode_stateid_maxsz + \
 220                                  4)
 221 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 222                                  decode_stateid_maxsz)
 223 #define encode_release_lockowner_maxsz \
 224                                 (op_encode_hdr_maxsz + \
 225                                  encode_lockowner_maxsz)
 226 #define decode_release_lockowner_maxsz \
 227                                 (op_decode_hdr_maxsz)
 228 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 229 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 230 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 231                                 1 + nfs4_name_maxsz + \
 232                                 1 + \
 233                                 nfs4_fattr_maxsz)
 234 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 235 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 236                                 1 + 2 + nfs4_name_maxsz + \
 237                                 encode_attrs_maxsz)
 238 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 239                                 decode_change_info_maxsz + \
 240                                 nfs4_fattr_bitmap_maxsz)
 241 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 242 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 243 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 244 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 245 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 246 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 247                                  nfs4_fattr_bitmap_maxsz + 1)
 248 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 249                                  encode_stateid_maxsz + 3)
 250 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 251 #define encode_fs_locations_maxsz \
 252                                 (encode_getattr_maxsz)
 253 #define decode_fs_locations_maxsz \
 254                                 (0)
 255
 256 #if defined(CONFIG_NFS_V4_1)
 257 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 258
 259 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 260                                 encode_verifier_maxsz + \
 261                                 1 /* co_ownerid.len */ + \
 262                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 263                                 1 /* flags */ + \
 264                                 1 /* spa_how */ + \
 265                                 0 /* SP4_NONE (for now) */ + \
 266                                 1 /* zero implemetation id array */)
 267 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 268                                 2 /* eir_clientid */ + \
 269                                 1 /* eir_sequenceid */ + \
 270                                 1 /* eir_flags */ + \
 271                                 1 /* spr_how */ + \
 272                                 0 /* SP4_NONE (for now) */ + \
 273                                 2 /* eir_server_owner.so_minor_id */ + \
 274                                 /* eir_server_owner.so_major_id<> */ \
 275                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 276                                 /* eir_server_scope<> */ \
 277                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 278                                 1 /* eir_server_impl_id array length */ + \
 279                                 0 /* ignored eir_server_impl_id contents */)
 280 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 281 #define decode_channel_attrs_maxsz  (6 + \
 282                                      1 /* ca_rdma_ird.len */ + \
 283                                      1 /* ca_rdma_ird */)
 284 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 285                                      2 /* csa_clientid */ + \
 286                                      1 /* csa_sequence */ + \
 287                                      1 /* csa_flags */ + \
 288                                      encode_channel_attrs_maxsz + \
 289                                      encode_channel_attrs_maxsz + \
 290                                      1 /* csa_cb_program */ + \
 291                                      1 /* csa_sec_parms.len (1) */ + \
 292                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 293                                      1 /* stamp */ + \
 294                                      1 /* machinename.len */ + \
 295                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 296                                      1 /* uid */ + \
 297                                      1 /* gid */ + \
 298                                      1 /* gids.len (0) */)
 299 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 300                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 301                                      1 /* csr_sequence */ + \
 302                                      1 /* csr_flags */ + \
 303                                      decode_channel_attrs_maxsz + \
 304                                      decode_channel_attrs_maxsz)
 305 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 306 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 307 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 308                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 309 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 310                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 311 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 312 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 313 #else /* CONFIG_NFS_V4_1 */
 314 #define encode_sequence_maxsz   0
 315 #define decode_sequence_maxsz   0
 316 #endif /* CONFIG_NFS_V4_1 */
 317
 318 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 319 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 320 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 321                                 encode_sequence_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_read_maxsz)
 324 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 325                                 decode_sequence_maxsz + \
 326                                 decode_putfh_maxsz + \
 327                                 decode_read_maxsz)
 328 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 329                                 encode_sequence_maxsz + \
 330                                 encode_putfh_maxsz + \
 331                                 encode_readlink_maxsz)
 332 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 333                                 decode_sequence_maxsz + \
 334                                 decode_putfh_maxsz + \
 335                                 decode_readlink_maxsz)
 336 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 337                                 encode_sequence_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_readdir_maxsz)
 340 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 341                                 decode_sequence_maxsz + \
 342                                 decode_putfh_maxsz + \
 343                                 decode_readdir_maxsz)
 344 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_write_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_write_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_commit_maxsz + \
 358                                 encode_getattr_maxsz)
 359 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 360                                 decode_sequence_maxsz + \
 361                                 decode_putfh_maxsz + \
 362                                 decode_commit_maxsz + \
 363                                 decode_getattr_maxsz)
 364 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 365                                 encode_sequence_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_savefh_maxsz + \
 368                                 encode_open_maxsz + \
 369                                 encode_getfh_maxsz + \
 370                                 encode_getattr_maxsz + \
 371                                 encode_restorefh_maxsz + \
 372                                 encode_getattr_maxsz)
 373 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 374                                 decode_sequence_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_savefh_maxsz + \
 377                                 decode_open_maxsz + \
 378                                 decode_getfh_maxsz + \
 379                                 decode_getattr_maxsz + \
 380                                 decode_restorefh_maxsz + \
 381                                 decode_getattr_maxsz)
 382 #define NFS4_enc_open_confirm_sz \
 383                                 (compound_encode_hdr_maxsz + \
 384                                  encode_putfh_maxsz + \
 385                                  encode_open_confirm_maxsz)
 386 #define NFS4_dec_open_confirm_sz \
 387                                 (compound_decode_hdr_maxsz + \
 388                                  decode_putfh_maxsz + \
 389                                  decode_open_confirm_maxsz)
 390 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 391                                         encode_sequence_maxsz + \
 392                                         encode_putfh_maxsz + \
 393                                         encode_open_maxsz + \
 394                                         encode_getattr_maxsz)
 395 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 396                                         decode_sequence_maxsz + \
 397                                         decode_putfh_maxsz + \
 398                                         decode_open_maxsz + \
 399                                         decode_getattr_maxsz)
 400 #define NFS4_enc_open_downgrade_sz \
 401                                 (compound_encode_hdr_maxsz + \
 402                                  encode_sequence_maxsz + \
 403                                  encode_putfh_maxsz + \
 404                                  encode_open_downgrade_maxsz + \
 405                                  encode_getattr_maxsz)
 406 #define NFS4_dec_open_downgrade_sz \
 407                                 (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_open_downgrade_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_close_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_close_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 423                                  encode_sequence_maxsz + \
 424                                  encode_putfh_maxsz + \
 425                                  encode_setattr_maxsz + \
 426                                  encode_getattr_maxsz)
 427 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 428                                  decode_sequence_maxsz + \
 429                                  decode_putfh_maxsz + \
 430                                  decode_setattr_maxsz + \
 431                                  decode_getattr_maxsz)
 432 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 433                                 encode_sequence_maxsz + \
 434                                 encode_putfh_maxsz + \
 435                                 encode_fsinfo_maxsz)
 436 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 437                                 decode_sequence_maxsz + \
 438                                 decode_putfh_maxsz + \
 439                                 decode_fsinfo_maxsz)
 440 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 441                                 encode_renew_maxsz)
 442 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 443                                 decode_renew_maxsz)
 444 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 445                                 encode_setclientid_maxsz)
 446 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 447                                 decode_setclientid_maxsz)
 448 #define NFS4_enc_setclientid_confirm_sz \
 449                                 (compound_encode_hdr_maxsz + \
 450                                 encode_setclientid_confirm_maxsz + \
 451                                 encode_putrootfh_maxsz + \
 452                                 encode_fsinfo_maxsz)
 453 #define NFS4_dec_setclientid_confirm_sz \
 454                                 (compound_decode_hdr_maxsz + \
 455                                 decode_setclientid_confirm_maxsz + \
 456                                 decode_putrootfh_maxsz + \
 457                                 decode_fsinfo_maxsz)
 458 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 459                                 encode_sequence_maxsz + \
 460                                 encode_putfh_maxsz + \
 461                                 encode_lock_maxsz)
 462 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 463                                 decode_sequence_maxsz + \
 464                                 decode_putfh_maxsz + \
 465                                 decode_lock_maxsz)
 466 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 467                                 encode_sequence_maxsz + \
 468                                 encode_putfh_maxsz + \
 469                                 encode_lockt_maxsz)
 470 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 471                                  decode_sequence_maxsz + \
 472                                  decode_putfh_maxsz + \
 473                                  decode_lockt_maxsz)
 474 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 475                                 encode_sequence_maxsz + \
 476                                 encode_putfh_maxsz + \
 477                                 encode_locku_maxsz)
 478 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 479                                 decode_sequence_maxsz + \
 480                                 decode_putfh_maxsz + \
 481                                 decode_locku_maxsz)
 482 #define NFS4_enc_release_lockowner_sz \
 483                                 (compound_encode_hdr_maxsz + \
 484                                  encode_lockowner_maxsz)
 485 #define NFS4_dec_release_lockowner_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_lockowner_maxsz)
 488 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_access_maxsz + \
 492                                 encode_getattr_maxsz)
 493 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 494                                 decode_sequence_maxsz + \
 495                                 decode_putfh_maxsz + \
 496                                 decode_access_maxsz + \
 497                                 decode_getattr_maxsz)
 498 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 499                                 encode_sequence_maxsz + \
 500                                 encode_putfh_maxsz + \
 501                                 encode_getattr_maxsz)
 502 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 503                                 decode_sequence_maxsz + \
 504                                 decode_putfh_maxsz + \
 505                                 decode_getattr_maxsz)
 506 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 507                                 encode_sequence_maxsz + \
 508                                 encode_putfh_maxsz + \
 509                                 encode_lookup_maxsz + \
 510                                 encode_getattr_maxsz + \
 511                                 encode_getfh_maxsz)
 512 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_lookup_maxsz + \
 516                                 decode_getattr_maxsz + \
 517                                 decode_getfh_maxsz)
 518 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 519                                 encode_sequence_maxsz + \
 520                                 encode_putrootfh_maxsz + \
 521                                 encode_getattr_maxsz + \
 522                                 encode_getfh_maxsz)
 523 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 524                                 decode_sequence_maxsz + \
 525                                 decode_putrootfh_maxsz + \
 526                                 decode_getattr_maxsz + \
 527                                 decode_getfh_maxsz)
 528 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 529                                 encode_sequence_maxsz + \
 530                                 encode_putfh_maxsz + \
 531                                 encode_remove_maxsz + \
 532                                 encode_getattr_maxsz)
 533 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_remove_maxsz + \
 537                                 decode_getattr_maxsz)
 538 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 539                                 encode_sequence_maxsz + \
 540                                 encode_putfh_maxsz + \
 541                                 encode_savefh_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_rename_maxsz + \
 544                                 encode_getattr_maxsz + \
 545                                 encode_restorefh_maxsz + \
 546                                 encode_getattr_maxsz)
 547 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 548                                 decode_sequence_maxsz + \
 549                                 decode_putfh_maxsz + \
 550                                 decode_savefh_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_rename_maxsz + \
 553                                 decode_getattr_maxsz + \
 554                                 decode_restorefh_maxsz + \
 555                                 decode_getattr_maxsz)
 556 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 557                                 encode_sequence_maxsz + \
 558                                 encode_putfh_maxsz + \
 559                                 encode_savefh_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_link_maxsz + \
 562                                 decode_getattr_maxsz + \
 563                                 encode_restorefh_maxsz + \
 564                                 decode_getattr_maxsz)
 565 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 566                                 decode_sequence_maxsz + \
 567                                 decode_putfh_maxsz + \
 568                                 decode_savefh_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_link_maxsz + \
 571                                 decode_getattr_maxsz + \
 572                                 decode_restorefh_maxsz + \
 573                                 decode_getattr_maxsz)
 574 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putfh_maxsz + \
 577                                 encode_symlink_maxsz + \
 578                                 encode_getattr_maxsz + \
 579                                 encode_getfh_maxsz)
 580 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 581                                 decode_sequence_maxsz + \
 582                                 decode_putfh_maxsz + \
 583                                 decode_symlink_maxsz + \
 584                                 decode_getattr_maxsz + \
 585                                 decode_getfh_maxsz)
 586 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 587                                 encode_sequence_maxsz + \
 588                                 encode_putfh_maxsz + \
 589                                 encode_savefh_maxsz + \
 590                                 encode_create_maxsz + \
 591                                 encode_getfh_maxsz + \
 592                                 encode_getattr_maxsz + \
 593                                 encode_restorefh_maxsz + \
 594                                 encode_getattr_maxsz)
 595 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_savefh_maxsz + \
 599                                 decode_create_maxsz + \
 600                                 decode_getfh_maxsz + \
 601                                 decode_getattr_maxsz + \
 602                                 decode_restorefh_maxsz + \
 603                                 decode_getattr_maxsz)
 604 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_statfs_maxsz)
 616 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_putfh_maxsz + \
 619                                 decode_statfs_maxsz)
 620 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 621                                 encode_sequence_maxsz + \
 622                                 encode_putfh_maxsz + \
 623                                 encode_getattr_maxsz)
 624 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_getattr_maxsz)
 628 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 629                                 encode_sequence_maxsz + \
 630                                 encode_putfh_maxsz + \
 631                                 encode_delegreturn_maxsz + \
 632                                 encode_getattr_maxsz)
 633 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_delegreturn_maxsz + \
 636                                 decode_getattr_maxsz)
 637 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_getacl_maxsz)
 641 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 642                                 decode_sequence_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_getacl_maxsz)
 645 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 646                                 encode_sequence_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_setacl_maxsz)
 649 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_setacl_maxsz)
 653 #define NFS4_enc_fs_locations_sz \
 654                                 (compound_encode_hdr_maxsz + \
 655                                  encode_sequence_maxsz + \
 656                                  encode_putfh_maxsz + \
 657                                  encode_lookup_maxsz + \
 658                                  encode_fs_locations_maxsz)
 659 #define NFS4_dec_fs_locations_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_sequence_maxsz + \
 662                                  decode_putfh_maxsz + \
 663                                  decode_lookup_maxsz + \
 664                                  decode_fs_locations_maxsz)
 665 #if defined(CONFIG_NFS_V4_1)
 666 #define NFS4_enc_exchange_id_sz \
 667                                 (compound_encode_hdr_maxsz + \
 668                                  encode_exchange_id_maxsz)
 669 #define NFS4_dec_exchange_id_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_exchange_id_maxsz)
 672 #define NFS4_enc_create_session_sz \
 673                                 (compound_encode_hdr_maxsz + \
 674                                  encode_create_session_maxsz)
 675 #define NFS4_dec_create_session_sz \
 676                                 (compound_decode_hdr_maxsz + \
 677                                  decode_create_session_maxsz)
 678 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 679                                          encode_destroy_session_maxsz)
 680 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 681                                          decode_destroy_session_maxsz)
 682 #define NFS4_enc_sequence_sz \
 683                                 (compound_decode_hdr_maxsz + \
 684                                  encode_sequence_maxsz)
 685 #define NFS4_dec_sequence_sz \
 686                                 (compound_decode_hdr_maxsz + \
 687                                  decode_sequence_maxsz)
 688 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 689                                          encode_sequence_maxsz + \
 690                                          encode_putrootfh_maxsz + \
 691                                          encode_fsinfo_maxsz)
 692 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 693                                          decode_sequence_maxsz + \
 694                                          decode_putrootfh_maxsz + \
 695                                          decode_fsinfo_maxsz)
 696 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 697                                          encode_sequence_maxsz + \
 698                                          encode_reclaim_complete_maxsz)
 699 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 700                                          decode_sequence_maxsz + \
 701                                          decode_reclaim_complete_maxsz)
 702
 703 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 704                                       compound_encode_hdr_maxsz +
 705                                       encode_sequence_maxsz +
 706                                       encode_putfh_maxsz +
 707                                       encode_getattr_maxsz) *
 708                                      XDR_UNIT);
 709
 710 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 711                                      compound_decode_hdr_maxsz +
 712                                      decode_sequence_maxsz +
 713                                      decode_putfh_maxsz) *
 714                                     XDR_UNIT);
 715 #endif /* CONFIG_NFS_V4_1 */
 716
 717 static const umode_t nfs_type2fmt[] = {
 718         [NF4BAD] = 0,
 719         [NF4REG] = S_IFREG,
 720         [NF4DIR] = S_IFDIR,
 721         [NF4BLK] = S_IFBLK,
 722         [NF4CHR] = S_IFCHR,
 723         [NF4LNK] = S_IFLNK,
 724         [NF4SOCK] = S_IFSOCK,
 725         [NF4FIFO] = S_IFIFO,
 726         [NF4ATTRDIR] = 0,
 727         [NF4NAMEDATTR] = 0,
 728 };
 729
 730 struct compound_hdr {
 731         int32_t         status;
 732         uint32_t        nops;
 733         __be32 *        nops_p;
 734         uint32_t        taglen;
 735         char *          tag;
 736         uint32_t        replen;         /* expected reply words */
 737         u32             minorversion;
 738 };
 739
 740 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 741 {
 742         __be32 *p = xdr_reserve_space(xdr, nbytes);
 743         BUG_ON(!p);
 744         return p;
 745 }
 746
 747 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 748 {
 749         __be32 *p;
 750
 751         p = xdr_reserve_space(xdr, 4 + len);
 752         BUG_ON(p == NULL);
 753         xdr_encode_opaque(p, str, len);
 754 }
 755
 756 static void encode_compound_hdr(struct xdr_stream *xdr,
 757                                 struct rpc_rqst *req,
 758                                 struct compound_hdr *hdr)
 759 {
 760         __be32 *p;
 761         struct rpc_auth *auth = req->rq_cred->cr_auth;
 762
 763         /* initialize running count of expected bytes in reply.
 764          * NOTE: the replied tag SHOULD be the same is the one sent,
 765          * but this is not required as a MUST for the server to do so. */
 766         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 767
 768         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 769         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 770         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 771         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 772         *p++ = cpu_to_be32(hdr->minorversion);
 773         hdr->nops_p = p;
 774         *p = cpu_to_be32(hdr->nops);
 775 }
 776
 777 static void encode_nops(struct compound_hdr *hdr)
 778 {
 779         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 780         *hdr->nops_p = htonl(hdr->nops);
 781 }
 782
 783 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 784 {
 785         __be32 *p;
 786
 787         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 788         BUG_ON(p == NULL);
 789         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 790 }
 791
 792 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 793 {
 794         char owner_name[IDMAP_NAMESZ];
 795         char owner_group[IDMAP_NAMESZ];
 796         int owner_namelen = 0;
 797         int owner_grouplen = 0;
 798         __be32 *p;
 799         __be32 *q;
 800         int len;
 801         uint32_t bmval0 = 0;
 802         uint32_t bmval1 = 0;
 803
 804         /*
 805          * We reserve enough space to write the entire attribute buffer at once.
 806          * In the worst-case, this would be
 807          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 808          *          = 36 bytes, plus any contribution from variable-length fields
 809          *            such as owner/group.
 810          */
 811         len = 16;
 812
 813         /* Sigh */
 814         if (iap->ia_valid & ATTR_SIZE)
 815                 len += 8;
 816         if (iap->ia_valid & ATTR_MODE)
 817                 len += 4;
 818         if (iap->ia_valid & ATTR_UID) {
 819                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 820                 if (owner_namelen < 0) {
 821                         dprintk("nfs: couldn't resolve uid %d to string\n",
 822                                         iap->ia_uid);
 823                         /* XXX */
 824                         strcpy(owner_name, "nobody");
 825                         owner_namelen = sizeof("nobody") - 1;
 826                         /* goto out; */
 827                 }
 828                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 829         }
 830         if (iap->ia_valid & ATTR_GID) {
 831                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 832                 if (owner_grouplen < 0) {
 833                         dprintk("nfs: couldn't resolve gid %d to string\n",
 834                                         iap->ia_gid);
 835                         strcpy(owner_group, "nobody");
 836                         owner_grouplen = sizeof("nobody") - 1;
 837                         /* goto out; */
 838                 }
 839                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 840         }
 841         if (iap->ia_valid & ATTR_ATIME_SET)
 842                 len += 16;
 843         else if (iap->ia_valid & ATTR_ATIME)
 844                 len += 4;
 845         if (iap->ia_valid & ATTR_MTIME_SET)
 846                 len += 16;
 847         else if (iap->ia_valid & ATTR_MTIME)
 848                 len += 4;
 849         p = reserve_space(xdr, len);
 850
 851         /*
 852          * We write the bitmap length now, but leave the bitmap and the attribute
 853          * buffer length to be backfilled at the end of this routine.
 854          */
 855         *p++ = cpu_to_be32(2);
 856         q = p;
 857         p += 3;
 858
 859         if (iap->ia_valid & ATTR_SIZE) {
 860                 bmval0 |= FATTR4_WORD0_SIZE;
 861                 p = xdr_encode_hyper(p, iap->ia_size);
 862         }
 863         if (iap->ia_valid & ATTR_MODE) {
 864                 bmval1 |= FATTR4_WORD1_MODE;
 865                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 866         }
 867         if (iap->ia_valid & ATTR_UID) {
 868                 bmval1 |= FATTR4_WORD1_OWNER;
 869                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 870         }
 871         if (iap->ia_valid & ATTR_GID) {
 872                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 873                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 874         }
 875         if (iap->ia_valid & ATTR_ATIME_SET) {
 876                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 877                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 878                 *p++ = cpu_to_be32(0);
 879                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 880                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 881         }
 882         else if (iap->ia_valid & ATTR_ATIME) {
 883                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 884                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 885         }
 886         if (iap->ia_valid & ATTR_MTIME_SET) {
 887                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 888                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 889                 *p++ = cpu_to_be32(0);
 890                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 891                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 892         }
 893         else if (iap->ia_valid & ATTR_MTIME) {
 894                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 895                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 896         }
 897
 898         /*
 899          * Now we backfill the bitmap and the attribute buffer length.
 900          */
 901         if (len != ((char *)p - (char *)q) + 4) {
 902                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 903                                 len, ((char *)p - (char *)q) + 4);
 904                 BUG();
 905         }
 906         len = (char *)p - (char *)q - 12;
 907         *q++ = htonl(bmval0);
 908         *q++ = htonl(bmval1);
 909         *q = htonl(len);
 910
 911 /* out: */
 912 }
 913
 914 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 915 {
 916         __be32 *p;
 917
 918         p = reserve_space(xdr, 8);
 919         *p++ = cpu_to_be32(OP_ACCESS);
 920         *p = cpu_to_be32(access);
 921         hdr->nops++;
 922         hdr->replen += decode_access_maxsz;
 923 }
 924
 925 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 926 {
 927         __be32 *p;
 928
 929         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 930         *p++ = cpu_to_be32(OP_CLOSE);
 931         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 932         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 933         hdr->nops++;
 934         hdr->replen += decode_close_maxsz;
 935 }
 936
 937 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 938 {
 939         __be32 *p;
 940
 941         p = reserve_space(xdr, 16);
 942         *p++ = cpu_to_be32(OP_COMMIT);
 943         p = xdr_encode_hyper(p, args->offset);
 944         *p = cpu_to_be32(args->count);
 945         hdr->nops++;
 946         hdr->replen += decode_commit_maxsz;
 947 }
 948
 949 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 950 {
 951         __be32 *p;
 952
 953         p = reserve_space(xdr, 8);
 954         *p++ = cpu_to_be32(OP_CREATE);
 955         *p = cpu_to_be32(create->ftype);
 956
 957         switch (create->ftype) {
 958         case NF4LNK:
 959                 p = reserve_space(xdr, 4);
 960                 *p = cpu_to_be32(create->u.symlink.len);
 961                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 962                 break;
 963
 964         case NF4BLK: case NF4CHR:
 965                 p = reserve_space(xdr, 8);
 966                 *p++ = cpu_to_be32(create->u.device.specdata1);
 967                 *p = cpu_to_be32(create->u.device.specdata2);
 968                 break;
 969
 970         default:
 971                 break;
 972         }
 973
 974         encode_string(xdr, create->name->len, create->name->name);
 975         hdr->nops++;
 976         hdr->replen += decode_create_maxsz;
 977
 978         encode_attrs(xdr, create->attrs, create->server);
 979 }
 980
 981 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 982 {
 983         __be32 *p;
 984
 985         p = reserve_space(xdr, 12);
 986         *p++ = cpu_to_be32(OP_GETATTR);
 987         *p++ = cpu_to_be32(1);
 988         *p = cpu_to_be32(bitmap);
 989         hdr->nops++;
 990         hdr->replen += decode_getattr_maxsz;
 991 }
 992
 993 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 994 {
 995         __be32 *p;
 996
 997         p = reserve_space(xdr, 16);
 998         *p++ = cpu_to_be32(OP_GETATTR);
 999         *p++ = cpu_to_be32(2);
1000         *p++ = cpu_to_be32(bm0);
1001         *p = cpu_to_be32(bm1);
1002         hdr->nops++;
1003         hdr->replen += decode_getattr_maxsz;
1004 }
1005
1006 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1007 {
1008         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1009                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1010 }
1011
1012 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1013 {
1014         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1015                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1016 }
1017
1018 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1019 {
1020         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1021                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1022 }
1023
1024 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1025 {
1026         __be32 *p;
1027
1028         p = reserve_space(xdr, 4);
1029         *p = cpu_to_be32(OP_GETFH);
1030         hdr->nops++;
1031         hdr->replen += decode_getfh_maxsz;
1032 }
1033
1034 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1035 {
1036         __be32 *p;
1037
1038         p = reserve_space(xdr, 8 + name->len);
1039         *p++ = cpu_to_be32(OP_LINK);
1040         xdr_encode_opaque(p, name->name, name->len);
1041         hdr->nops++;
1042         hdr->replen += decode_link_maxsz;
1043 }
1044
1045 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1046 {
1047         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1048                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1049         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1050 }
1051
1052 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1053 {
1054         if (fl->fl_end == OFFSET_MAX)
1055                 return ~(uint64_t)0;
1056         return fl->fl_end - fl->fl_start + 1;
1057 }
1058
1059 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1060 {
1061         __be32 *p;
1062
1063         p = reserve_space(xdr, 28);
1064         p = xdr_encode_hyper(p, lowner->clientid);
1065         *p++ = cpu_to_be32(16);
1066         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1067         xdr_encode_hyper(p, lowner->id);
1068 }
1069
1070 /*
1071  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1072  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1073  */
1074 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1075 {
1076         __be32 *p;
1077
1078         p = reserve_space(xdr, 32);
1079         *p++ = cpu_to_be32(OP_LOCK);
1080         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1081         *p++ = cpu_to_be32(args->reclaim);
1082         p = xdr_encode_hyper(p, args->fl->fl_start);
1083         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1084         *p = cpu_to_be32(args->new_lock_owner);
1085         if (args->new_lock_owner){
1086                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1087                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1088                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1089                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1090                 encode_lockowner(xdr, &args->lock_owner);
1091         }
1092         else {
1093                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1094                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1095                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1096         }
1097         hdr->nops++;
1098         hdr->replen += decode_lock_maxsz;
1099 }
1100
1101 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1102 {
1103         __be32 *p;
1104
1105         p = reserve_space(xdr, 24);
1106         *p++ = cpu_to_be32(OP_LOCKT);
1107         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1108         p = xdr_encode_hyper(p, args->fl->fl_start);
1109         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1110         encode_lockowner(xdr, &args->lock_owner);
1111         hdr->nops++;
1112         hdr->replen += decode_lockt_maxsz;
1113 }
1114
1115 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1116 {
1117         __be32 *p;
1118
1119         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1120         *p++ = cpu_to_be32(OP_LOCKU);
1121         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1122         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1123         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1124         p = xdr_encode_hyper(p, args->fl->fl_start);
1125         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1126         hdr->nops++;
1127         hdr->replen += decode_locku_maxsz;
1128 }
1129
1130 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1131 {
1132         __be32 *p;
1133
1134         p = reserve_space(xdr, 4);
1135         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1136         encode_lockowner(xdr, lowner);
1137         hdr->nops++;
1138         hdr->replen += decode_release_lockowner_maxsz;
1139 }
1140
1141 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1142 {
1143         int len = name->len;
1144         __be32 *p;
1145
1146         p = reserve_space(xdr, 8 + len);
1147         *p++ = cpu_to_be32(OP_LOOKUP);
1148         xdr_encode_opaque(p, name->name, len);
1149         hdr->nops++;
1150         hdr->replen += decode_lookup_maxsz;
1151 }
1152
1153 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1154 {
1155         __be32 *p;
1156
1157         p = reserve_space(xdr, 8);
1158         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1159         case FMODE_READ:
1160                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1161                 break;
1162         case FMODE_WRITE:
1163                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1164                 break;
1165         case FMODE_READ|FMODE_WRITE:
1166                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1167                 break;
1168         default:
1169                 *p++ = cpu_to_be32(0);
1170         }
1171         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1172 }
1173
1174 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1175 {
1176         __be32 *p;
1177  /*
1178  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1179  * owner 4 = 32
1180  */
1181         p = reserve_space(xdr, 8);
1182         *p++ = cpu_to_be32(OP_OPEN);
1183         *p = cpu_to_be32(arg->seqid->sequence->counter);
1184         encode_share_access(xdr, arg->fmode);
1185         p = reserve_space(xdr, 28);
1186         p = xdr_encode_hyper(p, arg->clientid);
1187         *p++ = cpu_to_be32(16);
1188         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1189         xdr_encode_hyper(p, arg->id);
1190 }
1191
1192 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1193 {
1194         __be32 *p;
1195         struct nfs_client *clp;
1196
1197         p = reserve_space(xdr, 4);
1198         switch(arg->open_flags & O_EXCL) {
1199         case 0:
1200                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1201                 encode_attrs(xdr, arg->u.attrs, arg->server);
1202                 break;
1203         default:
1204                 clp = arg->server->nfs_client;
1205                 if (clp->cl_mvops->minor_version > 0) {
1206                         if (nfs4_has_persistent_session(clp)) {
1207                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1208                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1209                         } else {
1210                                 struct iattr dummy;
1211
1212                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1213                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1214                                 dummy.ia_valid = 0;
1215                                 encode_attrs(xdr, &dummy, arg->server);
1216                         }
1217                 } else {
1218                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1219                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1220                 }
1221         }
1222 }
1223
1224 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1225 {
1226         __be32 *p;
1227
1228         p = reserve_space(xdr, 4);
1229         switch (arg->open_flags & O_CREAT) {
1230         case 0:
1231                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1232                 break;
1233         default:
1234                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1235                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1236                 encode_createmode(xdr, arg);
1237         }
1238 }
1239
1240 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1241 {
1242         __be32 *p;
1243
1244         p = reserve_space(xdr, 4);
1245         switch (delegation_type) {
1246         case 0:
1247                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1248                 break;
1249         case FMODE_READ:
1250                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1251                 break;
1252         case FMODE_WRITE|FMODE_READ:
1253                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1254                 break;
1255         default:
1256                 BUG();
1257         }
1258 }
1259
1260 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1261 {
1262         __be32 *p;
1263
1264         p = reserve_space(xdr, 4);
1265         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1266         encode_string(xdr, name->len, name->name);
1267 }
1268
1269 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1270 {
1271         __be32 *p;
1272
1273         p = reserve_space(xdr, 4);
1274         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1275         encode_delegation_type(xdr, type);
1276 }
1277
1278 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1279 {
1280         __be32 *p;
1281
1282         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1283         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1284         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1285         encode_string(xdr, name->len, name->name);
1286 }
1287
1288 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1289 {
1290         encode_openhdr(xdr, arg);
1291         encode_opentype(xdr, arg);
1292         switch (arg->claim) {
1293         case NFS4_OPEN_CLAIM_NULL:
1294                 encode_claim_null(xdr, arg->name);
1295                 break;
1296         case NFS4_OPEN_CLAIM_PREVIOUS:
1297                 encode_claim_previous(xdr, arg->u.delegation_type);
1298                 break;
1299         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1300                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1301                 break;
1302         default:
1303                 BUG();
1304         }
1305         hdr->nops++;
1306         hdr->replen += decode_open_maxsz;
1307 }
1308
1309 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1310 {
1311         __be32 *p;
1312
1313         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1314         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1315         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1316         *p = cpu_to_be32(arg->seqid->sequence->counter);
1317         hdr->nops++;
1318         hdr->replen += decode_open_confirm_maxsz;
1319 }
1320
1321 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1322 {
1323         __be32 *p;
1324
1325         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1326         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1327         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1328         *p = cpu_to_be32(arg->seqid->sequence->counter);
1329         encode_share_access(xdr, arg->fmode);
1330         hdr->nops++;
1331         hdr->replen += decode_open_downgrade_maxsz;
1332 }
1333
1334 static void
1335 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1336 {
1337         int len = fh->size;
1338         __be32 *p;
1339
1340         p = reserve_space(xdr, 8 + len);
1341         *p++ = cpu_to_be32(OP_PUTFH);
1342         xdr_encode_opaque(p, fh->data, len);
1343         hdr->nops++;
1344         hdr->replen += decode_putfh_maxsz;
1345 }
1346
1347 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1348 {
1349         __be32 *p;
1350
1351         p = reserve_space(xdr, 4);
1352         *p = cpu_to_be32(OP_PUTROOTFH);
1353         hdr->nops++;
1354         hdr->replen += decode_putrootfh_maxsz;
1355 }
1356
1357 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1358 {
1359         nfs4_stateid stateid;
1360         __be32 *p;
1361
1362         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1363         if (ctx->state != NULL) {
1364                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1365                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1366         } else
1367                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1368 }
1369
1370 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1371 {
1372         __be32 *p;
1373
1374         p = reserve_space(xdr, 4);
1375         *p = cpu_to_be32(OP_READ);
1376
1377         encode_stateid(xdr, args->context, args->lock_context);
1378
1379         p = reserve_space(xdr, 12);
1380         p = xdr_encode_hyper(p, args->offset);
1381         *p = cpu_to_be32(args->count);
1382         hdr->nops++;
1383         hdr->replen += decode_read_maxsz;
1384 }
1385
1386 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1387 {
1388         uint32_t attrs[2] = {0, 0};
1389         uint32_t dircount = readdir->count >> 1;
1390         __be32 *p;
1391
1392         if (readdir->plus) {
1393                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1394                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1395                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1396                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1397                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1398                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1399                 dircount >>= 1;
1400         }
1401         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1402         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1403         /* Switch to mounted_on_fileid if the server supports it */
1404         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1405                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1406         else
1407                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1408
1409         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1410         *p++ = cpu_to_be32(OP_READDIR);
1411         p = xdr_encode_hyper(p, readdir->cookie);
1412         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1413         *p++ = cpu_to_be32(dircount);
1414         *p++ = cpu_to_be32(readdir->count);
1415         *p++ = cpu_to_be32(2);
1416
1417         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1418         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1419         hdr->nops++;
1420         hdr->replen += decode_readdir_maxsz;
1421         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1422                         __func__,
1423                         (unsigned long long)readdir->cookie,
1424                         ((u32 *)readdir->verifier.data)[0],
1425                         ((u32 *)readdir->verifier.data)[1],
1426                         attrs[0] & readdir->bitmask[0],
1427                         attrs[1] & readdir->bitmask[1]);
1428 }
1429
1430 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1431 {
1432         __be32 *p;
1433
1434         p = reserve_space(xdr, 4);
1435         *p = cpu_to_be32(OP_READLINK);
1436         hdr->nops++;
1437         hdr->replen += decode_readlink_maxsz;
1438 }
1439
1440 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1441 {
1442         __be32 *p;
1443
1444         p = reserve_space(xdr, 8 + name->len);
1445         *p++ = cpu_to_be32(OP_REMOVE);
1446         xdr_encode_opaque(p, name->name, name->len);
1447         hdr->nops++;
1448         hdr->replen += decode_remove_maxsz;
1449 }
1450
1451 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4);
1456         *p = cpu_to_be32(OP_RENAME);
1457         encode_string(xdr, oldname->len, oldname->name);
1458         encode_string(xdr, newname->len, newname->name);
1459         hdr->nops++;
1460         hdr->replen += decode_rename_maxsz;
1461 }
1462
1463 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1464 {
1465         __be32 *p;
1466
1467         p = reserve_space(xdr, 12);
1468         *p++ = cpu_to_be32(OP_RENEW);
1469         xdr_encode_hyper(p, client_stateid->cl_clientid);
1470         hdr->nops++;
1471         hdr->replen += decode_renew_maxsz;
1472 }
1473
1474 static void
1475 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1476 {
1477         __be32 *p;
1478
1479         p = reserve_space(xdr, 4);
1480         *p = cpu_to_be32(OP_RESTOREFH);
1481         hdr->nops++;
1482         hdr->replen += decode_restorefh_maxsz;
1483 }
1484
1485 static int
1486 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1491         *p++ = cpu_to_be32(OP_SETATTR);
1492         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1493         p = reserve_space(xdr, 2*4);
1494         *p++ = cpu_to_be32(1);
1495         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1496         if (arg->acl_len % 4)
1497                 return -EINVAL;
1498         p = reserve_space(xdr, 4);
1499         *p = cpu_to_be32(arg->acl_len);
1500         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1501         hdr->nops++;
1502         hdr->replen += decode_setacl_maxsz;
1503         return 0;
1504 }
1505
1506 static void
1507 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(OP_SAVEFH);
1513         hdr->nops++;
1514         hdr->replen += decode_savefh_maxsz;
1515 }
1516
1517 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1522         *p++ = cpu_to_be32(OP_SETATTR);
1523         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1524         hdr->nops++;
1525         hdr->replen += decode_setattr_maxsz;
1526         encode_attrs(xdr, arg->iap, server);
1527 }
1528
1529 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1530 {
1531         __be32 *p;
1532
1533         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1534         *p++ = cpu_to_be32(OP_SETCLIENTID);
1535         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1536
1537         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1538         p = reserve_space(xdr, 4);
1539         *p = cpu_to_be32(setclientid->sc_prog);
1540         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1541         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1542         p = reserve_space(xdr, 4);
1543         *p = cpu_to_be32(setclientid->sc_cb_ident);
1544         hdr->nops++;
1545         hdr->replen += decode_setclientid_maxsz;
1546 }
1547
1548 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1549 {
1550         __be32 *p;
1551
1552         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1553         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1554         p = xdr_encode_hyper(p, arg->clientid);
1555         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1556         hdr->nops++;
1557         hdr->replen += decode_setclientid_confirm_maxsz;
1558 }
1559
1560 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1561 {
1562         __be32 *p;
1563
1564         p = reserve_space(xdr, 4);
1565         *p = cpu_to_be32(OP_WRITE);
1566
1567         encode_stateid(xdr, args->context, args->lock_context);
1568
1569         p = reserve_space(xdr, 16);
1570         p = xdr_encode_hyper(p, args->offset);
1571         *p++ = cpu_to_be32(args->stable);
1572         *p = cpu_to_be32(args->count);
1573
1574         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1575         hdr->nops++;
1576         hdr->replen += decode_write_maxsz;
1577 }
1578
1579 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1580 {
1581         __be32 *p;
1582
1583         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1584
1585         *p++ = cpu_to_be32(OP_DELEGRETURN);
1586         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1587         hdr->nops++;
1588         hdr->replen += decode_delegreturn_maxsz;
1589 }
1590
1591 #if defined(CONFIG_NFS_V4_1)
1592 /* NFSv4.1 operations */
1593 static void encode_exchange_id(struct xdr_stream *xdr,
1594                                struct nfs41_exchange_id_args *args,
1595                                struct compound_hdr *hdr)
1596 {
1597         __be32 *p;
1598
1599         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1600         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1601         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1602
1603         encode_string(xdr, args->id_len, args->id);
1604
1605         p = reserve_space(xdr, 12);
1606         *p++ = cpu_to_be32(args->flags);
1607         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1608         *p = cpu_to_be32(0);    /* zero length implementation id array */
1609         hdr->nops++;
1610         hdr->replen += decode_exchange_id_maxsz;
1611 }
1612
1613 static void encode_create_session(struct xdr_stream *xdr,
1614                                   struct nfs41_create_session_args *args,
1615                                   struct compound_hdr *hdr)
1616 {
1617         __be32 *p;
1618         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1619         uint32_t len;
1620         struct nfs_client *clp = args->client;
1621         u32 max_resp_sz_cached;
1622
1623         /*
1624          * Assumes OPEN is the biggest non-idempotent compound.
1625          * 2 is the verifier.
1626          */
1627         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1628                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1629
1630         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1631                         clp->cl_ipaddr);
1632
1633         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1634         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1635         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1636         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1637         *p++ = cpu_to_be32(args->flags);                        /*flags */
1638
1639         /* Fore Channel */
1640         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1641         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1642         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1643         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1644         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1645         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1646         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1647
1648         /* Back Channel */
1649         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1650         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1651         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1652         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1653         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1654         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1655         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1656
1657         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1658         *p++ = cpu_to_be32(1);
1659         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1660
1661         /* authsys_parms rfc1831 */
1662         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1663         p = xdr_encode_opaque(p, machine_name, len);
1664         *p++ = cpu_to_be32(0);                          /* UID */
1665         *p++ = cpu_to_be32(0);                          /* GID */
1666         *p = cpu_to_be32(0);                            /* No more gids */
1667         hdr->nops++;
1668         hdr->replen += decode_create_session_maxsz;
1669 }
1670
1671 static void encode_destroy_session(struct xdr_stream *xdr,
1672                                    struct nfs4_session *session,
1673                                    struct compound_hdr *hdr)
1674 {
1675         __be32 *p;
1676         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1677         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1678         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1679         hdr->nops++;
1680         hdr->replen += decode_destroy_session_maxsz;
1681 }
1682
1683 static void encode_reclaim_complete(struct xdr_stream *xdr,
1684                                     struct nfs41_reclaim_complete_args *args,
1685                                     struct compound_hdr *hdr)
1686 {
1687         __be32 *p;
1688
1689         p = reserve_space(xdr, 8);
1690         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1691         *p++ = cpu_to_be32(args->one_fs);
1692         hdr->nops++;
1693         hdr->replen += decode_reclaim_complete_maxsz;
1694 }
1695 #endif /* CONFIG_NFS_V4_1 */
1696
1697 static void encode_sequence(struct xdr_stream *xdr,
1698                             const struct nfs4_sequence_args *args,
1699                             struct compound_hdr *hdr)
1700 {
1701 #if defined(CONFIG_NFS_V4_1)
1702         struct nfs4_session *session = args->sa_session;
1703         struct nfs4_slot_table *tp;
1704         struct nfs4_slot *slot;
1705         __be32 *p;
1706
1707         if (!session)
1708                 return;
1709
1710         tp = &session->fc_slot_table;
1711
1712         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1713         slot = tp->slots + args->sa_slotid;
1714
1715         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1716         *p++ = cpu_to_be32(OP_SEQUENCE);
1717
1718         /*
1719          * Sessionid + seqid + slotid + max slotid + cache_this
1720          */
1721         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1722                 "max_slotid=%d cache_this=%d\n",
1723                 __func__,
1724                 ((u32 *)session->sess_id.data)[0],
1725                 ((u32 *)session->sess_id.data)[1],
1726                 ((u32 *)session->sess_id.data)[2],
1727                 ((u32 *)session->sess_id.data)[3],
1728                 slot->seq_nr, args->sa_slotid,
1729                 tp->highest_used_slotid, args->sa_cache_this);
1730         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1731         *p++ = cpu_to_be32(slot->seq_nr);
1732         *p++ = cpu_to_be32(args->sa_slotid);
1733         *p++ = cpu_to_be32(tp->highest_used_slotid);
1734         *p = cpu_to_be32(args->sa_cache_this);
1735         hdr->nops++;
1736         hdr->replen += decode_sequence_maxsz;
1737 #endif /* CONFIG_NFS_V4_1 */
1738 }
1739
1740 /*
1741  * END OF "GENERIC" ENCODE ROUTINES.
1742  */
1743
1744 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1745 {
1746 #if defined(CONFIG_NFS_V4_1)
1747         if (args->sa_session)
1748                 return args->sa_session->clp->cl_mvops->minor_version;
1749 #endif /* CONFIG_NFS_V4_1 */
1750         return 0;
1751 }
1752
1753 /*
1754  * Encode an ACCESS request
1755  */
1756 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1757 {
1758         struct xdr_stream xdr;
1759         struct compound_hdr hdr = {
1760                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1761         };
1762
1763         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1764         encode_compound_hdr(&xdr, req, &hdr);
1765         encode_sequence(&xdr, &args->seq_args, &hdr);
1766         encode_putfh(&xdr, args->fh, &hdr);
1767         encode_access(&xdr, args->access, &hdr);
1768         encode_getfattr(&xdr, args->bitmask, &hdr);
1769         encode_nops(&hdr);
1770         return 0;
1771 }
1772
1773 /*
1774  * Encode LOOKUP request
1775  */
1776 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1777 {
1778         struct xdr_stream xdr;
1779         struct compound_hdr hdr = {
1780                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1781         };
1782
1783         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1784         encode_compound_hdr(&xdr, req, &hdr);
1785         encode_sequence(&xdr, &args->seq_args, &hdr);
1786         encode_putfh(&xdr, args->dir_fh, &hdr);
1787         encode_lookup(&xdr, args->name, &hdr);
1788         encode_getfh(&xdr, &hdr);
1789         encode_getfattr(&xdr, args->bitmask, &hdr);
1790         encode_nops(&hdr);
1791         return 0;
1792 }
1793
1794 /*
1795  * Encode LOOKUP_ROOT request
1796  */
1797 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1798 {
1799         struct xdr_stream xdr;
1800         struct compound_hdr hdr = {
1801                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1802         };
1803
1804         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805         encode_compound_hdr(&xdr, req, &hdr);
1806         encode_sequence(&xdr, &args->seq_args, &hdr);
1807         encode_putrootfh(&xdr, &hdr);
1808         encode_getfh(&xdr, &hdr);
1809         encode_getfattr(&xdr, args->bitmask, &hdr);
1810         encode_nops(&hdr);
1811         return 0;
1812 }
1813
1814 /*
1815  * Encode REMOVE request
1816  */
1817 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *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_remove(&xdr, &args->name, &hdr);
1829         encode_getfattr(&xdr, args->bitmask, &hdr);
1830         encode_nops(&hdr);
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode RENAME request
1836  */
1837 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
1838 {
1839         struct xdr_stream xdr;
1840         struct compound_hdr hdr = {
1841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842         };
1843
1844         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845         encode_compound_hdr(&xdr, req, &hdr);
1846         encode_sequence(&xdr, &args->seq_args, &hdr);
1847         encode_putfh(&xdr, args->old_dir, &hdr);
1848         encode_savefh(&xdr, &hdr);
1849         encode_putfh(&xdr, args->new_dir, &hdr);
1850         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1851         encode_getfattr(&xdr, args->bitmask, &hdr);
1852         encode_restorefh(&xdr, &hdr);
1853         encode_getfattr(&xdr, args->bitmask, &hdr);
1854         encode_nops(&hdr);
1855         return 0;
1856 }
1857
1858 /*
1859  * Encode LINK request
1860  */
1861 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1862 {
1863         struct xdr_stream xdr;
1864         struct compound_hdr hdr = {
1865                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1866         };
1867
1868         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1869         encode_compound_hdr(&xdr, req, &hdr);
1870         encode_sequence(&xdr, &args->seq_args, &hdr);
1871         encode_putfh(&xdr, args->fh, &hdr);
1872         encode_savefh(&xdr, &hdr);
1873         encode_putfh(&xdr, args->dir_fh, &hdr);
1874         encode_link(&xdr, args->name, &hdr);
1875         encode_getfattr(&xdr, args->bitmask, &hdr);
1876         encode_restorefh(&xdr, &hdr);
1877         encode_getfattr(&xdr, args->bitmask, &hdr);
1878         encode_nops(&hdr);
1879         return 0;
1880 }
1881
1882 /*
1883  * Encode CREATE request
1884  */
1885 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1886 {
1887         struct xdr_stream xdr;
1888         struct compound_hdr hdr = {
1889                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1890         };
1891
1892         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1893         encode_compound_hdr(&xdr, req, &hdr);
1894         encode_sequence(&xdr, &args->seq_args, &hdr);
1895         encode_putfh(&xdr, args->dir_fh, &hdr);
1896         encode_savefh(&xdr, &hdr);
1897         encode_create(&xdr, args, &hdr);
1898         encode_getfh(&xdr, &hdr);
1899         encode_getfattr(&xdr, args->bitmask, &hdr);
1900         encode_restorefh(&xdr, &hdr);
1901         encode_getfattr(&xdr, args->bitmask, &hdr);
1902         encode_nops(&hdr);
1903         return 0;
1904 }
1905
1906 /*
1907  * Encode SYMLINK request
1908  */
1909 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1910 {
1911         return nfs4_xdr_enc_create(req, p, args);
1912 }
1913
1914 /*
1915  * Encode GETATTR request
1916  */
1917 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1918 {
1919         struct xdr_stream xdr;
1920         struct compound_hdr hdr = {
1921                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1922         };
1923
1924         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1925         encode_compound_hdr(&xdr, req, &hdr);
1926         encode_sequence(&xdr, &args->seq_args, &hdr);
1927         encode_putfh(&xdr, args->fh, &hdr);
1928         encode_getfattr(&xdr, args->bitmask, &hdr);
1929         encode_nops(&hdr);
1930         return 0;
1931 }
1932
1933 /*
1934  * Encode a CLOSE request
1935  */
1936 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1937 {
1938         struct xdr_stream xdr;
1939         struct compound_hdr hdr = {
1940                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1941         };
1942
1943         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1944         encode_compound_hdr(&xdr, req, &hdr);
1945         encode_sequence(&xdr, &args->seq_args, &hdr);
1946         encode_putfh(&xdr, args->fh, &hdr);
1947         encode_close(&xdr, args, &hdr);
1948         encode_getfattr(&xdr, args->bitmask, &hdr);
1949         encode_nops(&hdr);
1950         return 0;
1951 }
1952
1953 /*
1954  * Encode an OPEN request
1955  */
1956 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1957 {
1958         struct xdr_stream xdr;
1959         struct compound_hdr hdr = {
1960                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1961         };
1962
1963         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964         encode_compound_hdr(&xdr, req, &hdr);
1965         encode_sequence(&xdr, &args->seq_args, &hdr);
1966         encode_putfh(&xdr, args->fh, &hdr);
1967         encode_savefh(&xdr, &hdr);
1968         encode_open(&xdr, args, &hdr);
1969         encode_getfh(&xdr, &hdr);
1970         encode_getfattr(&xdr, args->bitmask, &hdr);
1971         encode_restorefh(&xdr, &hdr);
1972         encode_getfattr(&xdr, args->bitmask, &hdr);
1973         encode_nops(&hdr);
1974         return 0;
1975 }
1976
1977 /*
1978  * Encode an OPEN_CONFIRM request
1979  */
1980 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1981 {
1982         struct xdr_stream xdr;
1983         struct compound_hdr hdr = {
1984                 .nops   = 0,
1985         };
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, req, &hdr);
1989         encode_putfh(&xdr, args->fh, &hdr);
1990         encode_open_confirm(&xdr, args, &hdr);
1991         encode_nops(&hdr);
1992         return 0;
1993 }
1994
1995 /*
1996  * Encode an OPEN request with no attributes.
1997  */
1998 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1999 {
2000         struct xdr_stream xdr;
2001         struct compound_hdr hdr = {
2002                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2003         };
2004
2005         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2006         encode_compound_hdr(&xdr, req, &hdr);
2007         encode_sequence(&xdr, &args->seq_args, &hdr);
2008         encode_putfh(&xdr, args->fh, &hdr);
2009         encode_open(&xdr, args, &hdr);
2010         encode_getfattr(&xdr, args->bitmask, &hdr);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  * Encode an OPEN_DOWNGRADE request
2017  */
2018 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026         encode_compound_hdr(&xdr, req, &hdr);
2027         encode_sequence(&xdr, &args->seq_args, &hdr);
2028         encode_putfh(&xdr, args->fh, &hdr);
2029         encode_open_downgrade(&xdr, args, &hdr);
2030         encode_getfattr(&xdr, args->bitmask, &hdr);
2031         encode_nops(&hdr);
2032         return 0;
2033 }
2034
2035 /*
2036  * Encode a LOCK request
2037  */
2038 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
2039 {
2040         struct xdr_stream xdr;
2041         struct compound_hdr hdr = {
2042                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2043         };
2044
2045         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2046         encode_compound_hdr(&xdr, req, &hdr);
2047         encode_sequence(&xdr, &args->seq_args, &hdr);
2048         encode_putfh(&xdr, args->fh, &hdr);
2049         encode_lock(&xdr, args, &hdr);
2050         encode_nops(&hdr);
2051         return 0;
2052 }
2053
2054 /*
2055  * Encode a LOCKT request
2056  */
2057 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2058 {
2059         struct xdr_stream xdr;
2060         struct compound_hdr hdr = {
2061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062         };
2063
2064         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2065         encode_compound_hdr(&xdr, req, &hdr);
2066         encode_sequence(&xdr, &args->seq_args, &hdr);
2067         encode_putfh(&xdr, args->fh, &hdr);
2068         encode_lockt(&xdr, args, &hdr);
2069         encode_nops(&hdr);
2070         return 0;
2071 }
2072
2073 /*
2074  * Encode a LOCKU request
2075  */
2076 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2077 {
2078         struct xdr_stream xdr;
2079         struct compound_hdr hdr = {
2080                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081         };
2082
2083         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084         encode_compound_hdr(&xdr, req, &hdr);
2085         encode_sequence(&xdr, &args->seq_args, &hdr);
2086         encode_putfh(&xdr, args->fh, &hdr);
2087         encode_locku(&xdr, args, &hdr);
2088         encode_nops(&hdr);
2089         return 0;
2090 }
2091
2092 static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
2093 {
2094         struct xdr_stream xdr;
2095         struct compound_hdr hdr = {
2096                 .minorversion = 0,
2097         };
2098
2099         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2100         encode_compound_hdr(&xdr, req, &hdr);
2101         encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
2102         encode_nops(&hdr);
2103         return 0;
2104 }
2105
2106 /*
2107  * Encode a READLINK request
2108  */
2109 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2110 {
2111         struct xdr_stream xdr;
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115
2116         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2117         encode_compound_hdr(&xdr, req, &hdr);
2118         encode_sequence(&xdr, &args->seq_args, &hdr);
2119         encode_putfh(&xdr, args->fh, &hdr);
2120         encode_readlink(&xdr, args, req, &hdr);
2121
2122         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2123                         args->pgbase, args->pglen);
2124         encode_nops(&hdr);
2125         return 0;
2126 }
2127
2128 /*
2129  * Encode a READDIR request
2130  */
2131 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2132 {
2133         struct xdr_stream xdr;
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2139         encode_compound_hdr(&xdr, req, &hdr);
2140         encode_sequence(&xdr, &args->seq_args, &hdr);
2141         encode_putfh(&xdr, args->fh, &hdr);
2142         encode_readdir(&xdr, args, req, &hdr);
2143
2144         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2145                          args->pgbase, args->count);
2146         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2147                         __func__, hdr.replen << 2, args->pages,
2148                         args->pgbase, args->count);
2149         encode_nops(&hdr);
2150         return 0;
2151 }
2152
2153 /*
2154  * Encode a READ request
2155  */
2156 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2157 {
2158         struct xdr_stream xdr;
2159         struct compound_hdr hdr = {
2160                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2161         };
2162
2163         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2164         encode_compound_hdr(&xdr, req, &hdr);
2165         encode_sequence(&xdr, &args->seq_args, &hdr);
2166         encode_putfh(&xdr, args->fh, &hdr);
2167         encode_read(&xdr, args, &hdr);
2168
2169         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2170                          args->pages, args->pgbase, args->count);
2171         req->rq_rcv_buf.flags |= XDRBUF_READ;
2172         encode_nops(&hdr);
2173         return 0;
2174 }
2175
2176 /*
2177  * Encode an SETATTR request
2178  */
2179 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2180 {
2181         struct xdr_stream xdr;
2182         struct compound_hdr hdr = {
2183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184         };
2185
2186         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2187         encode_compound_hdr(&xdr, req, &hdr);
2188         encode_sequence(&xdr, &args->seq_args, &hdr);
2189         encode_putfh(&xdr, args->fh, &hdr);
2190         encode_setattr(&xdr, args, args->server, &hdr);
2191         encode_getfattr(&xdr, args->bitmask, &hdr);
2192         encode_nops(&hdr);
2193         return 0;
2194 }
2195
2196 /*
2197  * Encode a GETACL request
2198  */
2199 static int
2200 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2201                 struct nfs_getaclargs *args)
2202 {
2203         struct xdr_stream xdr;
2204         struct compound_hdr hdr = {
2205                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2206         };
2207         uint32_t replen;
2208
2209         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2210         encode_compound_hdr(&xdr, req, &hdr);
2211         encode_sequence(&xdr, &args->seq_args, &hdr);
2212         encode_putfh(&xdr, args->fh, &hdr);
2213         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2214         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2215
2216         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2217                 args->acl_pages, args->acl_pgbase, args->acl_len);
2218         encode_nops(&hdr);
2219         return 0;
2220 }
2221
2222 /*
2223  * Encode a WRITE request
2224  */
2225 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2226 {
2227         struct xdr_stream xdr;
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2233         encode_compound_hdr(&xdr, req, &hdr);
2234         encode_sequence(&xdr, &args->seq_args, &hdr);
2235         encode_putfh(&xdr, args->fh, &hdr);
2236         encode_write(&xdr, args, &hdr);
2237         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2238         encode_getfattr(&xdr, args->bitmask, &hdr);
2239         encode_nops(&hdr);
2240         return 0;
2241 }
2242
2243 /*
2244  *  a COMMIT request
2245  */
2246 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2247 {
2248         struct xdr_stream xdr;
2249         struct compound_hdr hdr = {
2250                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251         };
2252
2253         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2254         encode_compound_hdr(&xdr, req, &hdr);
2255         encode_sequence(&xdr, &args->seq_args, &hdr);
2256         encode_putfh(&xdr, args->fh, &hdr);
2257         encode_commit(&xdr, args, &hdr);
2258         encode_getfattr(&xdr, args->bitmask, &hdr);
2259         encode_nops(&hdr);
2260         return 0;
2261 }
2262
2263 /*
2264  * FSINFO request
2265  */
2266 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2267 {
2268         struct xdr_stream xdr;
2269         struct compound_hdr hdr = {
2270                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2271         };
2272
2273         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2274         encode_compound_hdr(&xdr, req, &hdr);
2275         encode_sequence(&xdr, &args->seq_args, &hdr);
2276         encode_putfh(&xdr, args->fh, &hdr);
2277         encode_fsinfo(&xdr, args->bitmask, &hdr);
2278         encode_nops(&hdr);
2279         return 0;
2280 }
2281
2282 /*
2283  * a PATHCONF request
2284  */
2285 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2286 {
2287         struct xdr_stream xdr;
2288         struct compound_hdr hdr = {
2289                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2290         };
2291
2292         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2293         encode_compound_hdr(&xdr, req, &hdr);
2294         encode_sequence(&xdr, &args->seq_args, &hdr);
2295         encode_putfh(&xdr, args->fh, &hdr);
2296         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2297                            &hdr);
2298         encode_nops(&hdr);
2299         return 0;
2300 }
2301
2302 /*
2303  * a STATFS request
2304  */
2305 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2306 {
2307         struct xdr_stream xdr;
2308         struct compound_hdr hdr = {
2309                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2310         };
2311
2312         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2313         encode_compound_hdr(&xdr, req, &hdr);
2314         encode_sequence(&xdr, &args->seq_args, &hdr);
2315         encode_putfh(&xdr, args->fh, &hdr);
2316         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2317                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2318         encode_nops(&hdr);
2319         return 0;
2320 }
2321
2322 /*
2323  * GETATTR_BITMAP request
2324  */
2325 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2326                                     struct nfs4_server_caps_arg *args)
2327 {
2328         struct xdr_stream xdr;
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2334         encode_compound_hdr(&xdr, req, &hdr);
2335         encode_sequence(&xdr, &args->seq_args, &hdr);
2336         encode_putfh(&xdr, args->fhandle, &hdr);
2337         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2338                            FATTR4_WORD0_LINK_SUPPORT|
2339                            FATTR4_WORD0_SYMLINK_SUPPORT|
2340                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2341         encode_nops(&hdr);
2342         return 0;
2343 }
2344
2345 /*
2346  * a RENEW request
2347  */
2348 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2349 {
2350         struct xdr_stream xdr;
2351         struct compound_hdr hdr = {
2352                 .nops   = 0,
2353         };
2354
2355         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2356         encode_compound_hdr(&xdr, req, &hdr);
2357         encode_renew(&xdr, clp, &hdr);
2358         encode_nops(&hdr);
2359         return 0;
2360 }
2361
2362 /*
2363  * a SETCLIENTID request
2364  */
2365 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2366 {
2367         struct xdr_stream xdr;
2368         struct compound_hdr hdr = {
2369                 .nops   = 0,
2370         };
2371
2372         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2373         encode_compound_hdr(&xdr, req, &hdr);
2374         encode_setclientid(&xdr, sc, &hdr);
2375         encode_nops(&hdr);
2376         return 0;
2377 }
2378
2379 /*
2380  * a SETCLIENTID_CONFIRM request
2381  */
2382 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
2383 {
2384         struct xdr_stream xdr;
2385         struct compound_hdr hdr = {
2386                 .nops   = 0,
2387         };
2388         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2389
2390         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2391         encode_compound_hdr(&xdr, req, &hdr);
2392         encode_setclientid_confirm(&xdr, arg, &hdr);
2393         encode_putrootfh(&xdr, &hdr);
2394         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2395         encode_nops(&hdr);
2396         return 0;
2397 }
2398
2399 /*
2400  * DELEGRETURN request
2401  */
2402 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2403 {
2404         struct xdr_stream xdr;
2405         struct compound_hdr hdr = {
2406                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407         };
2408
2409         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2410         encode_compound_hdr(&xdr, req, &hdr);
2411         encode_sequence(&xdr, &args->seq_args, &hdr);
2412         encode_putfh(&xdr, args->fhandle, &hdr);
2413         encode_delegreturn(&xdr, args->stateid, &hdr);
2414         encode_getfattr(&xdr, args->bitmask, &hdr);
2415         encode_nops(&hdr);
2416         return 0;
2417 }
2418
2419 /*
2420  * Encode FS_LOCATIONS request
2421  */
2422 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2423 {
2424         struct xdr_stream xdr;
2425         struct compound_hdr hdr = {
2426                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427         };
2428         uint32_t replen;
2429
2430         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2431         encode_compound_hdr(&xdr, req, &hdr);
2432         encode_sequence(&xdr, &args->seq_args, &hdr);
2433         encode_putfh(&xdr, args->dir_fh, &hdr);
2434         encode_lookup(&xdr, args->name, &hdr);
2435         replen = hdr.replen;    /* get the attribute into args->page */
2436         encode_fs_locations(&xdr, args->bitmask, &hdr);
2437
2438         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2439                         0, PAGE_SIZE);
2440         encode_nops(&hdr);
2441         return 0;
2442 }
2443
2444 #if defined(CONFIG_NFS_V4_1)
2445 /*
2446  * EXCHANGE_ID request
2447  */
2448 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2449                                     struct nfs41_exchange_id_args *args)
2450 {
2451         struct xdr_stream xdr;
2452         struct compound_hdr hdr = {
2453                 .minorversion = args->client->cl_mvops->minor_version,
2454         };
2455
2456         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2457         encode_compound_hdr(&xdr, req, &hdr);
2458         encode_exchange_id(&xdr, args, &hdr);
2459         encode_nops(&hdr);
2460         return 0;
2461 }
2462
2463 /*
2464  * a CREATE_SESSION request
2465  */
2466 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2467                                        struct nfs41_create_session_args *args)
2468 {
2469         struct xdr_stream xdr;
2470         struct compound_hdr hdr = {
2471                 .minorversion = args->client->cl_mvops->minor_version,
2472         };
2473
2474         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2475         encode_compound_hdr(&xdr, req, &hdr);
2476         encode_create_session(&xdr, args, &hdr);
2477         encode_nops(&hdr);
2478         return 0;
2479 }
2480
2481 /*
2482  * a DESTROY_SESSION request
2483  */
2484 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2485                                         struct nfs4_session *session)
2486 {
2487         struct xdr_stream xdr;
2488         struct compound_hdr hdr = {
2489                 .minorversion = session->clp->cl_mvops->minor_version,
2490         };
2491
2492         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2493         encode_compound_hdr(&xdr, req, &hdr);
2494         encode_destroy_session(&xdr, session, &hdr);
2495         encode_nops(&hdr);
2496         return 0;
2497 }
2498
2499 /*
2500  * a SEQUENCE request
2501  */
2502 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2503                                  struct nfs4_sequence_args *args)
2504 {
2505         struct xdr_stream xdr;
2506         struct compound_hdr hdr = {
2507                 .minorversion = nfs4_xdr_minorversion(args),
2508         };
2509
2510         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2511         encode_compound_hdr(&xdr, req, &hdr);
2512         encode_sequence(&xdr, args, &hdr);
2513         encode_nops(&hdr);
2514         return 0;
2515 }
2516
2517 /*
2518  * a GET_LEASE_TIME request
2519  */
2520 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2521                                        struct nfs4_get_lease_time_args *args)
2522 {
2523         struct xdr_stream xdr;
2524         struct compound_hdr hdr = {
2525                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2526         };
2527         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2528
2529         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2530         encode_compound_hdr(&xdr, req, &hdr);
2531         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2532         encode_putrootfh(&xdr, &hdr);
2533         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2534         encode_nops(&hdr);
2535         return 0;
2536 }
2537
2538 /*
2539  * a RECLAIM_COMPLETE request
2540  */
2541 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2542                                      struct nfs41_reclaim_complete_args *args)
2543 {
2544         struct xdr_stream xdr;
2545         struct compound_hdr hdr = {
2546                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2547         };
2548
2549         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2550         encode_compound_hdr(&xdr, req, &hdr);
2551         encode_sequence(&xdr, &args->seq_args, &hdr);
2552         encode_reclaim_complete(&xdr, args, &hdr);
2553         encode_nops(&hdr);
2554         return 0;
2555 }
2556
2557 #endif /* CONFIG_NFS_V4_1 */
2558
2559 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2560 {
2561         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2562                 "Remaining buffer length is %tu words.\n",
2563                 func, xdr->end - xdr->p);
2564 }
2565
2566 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2567 {
2568         __be32 *p;
2569
2570         p = xdr_inline_decode(xdr, 4);
2571         if (unlikely(!p))
2572                 goto out_overflow;
2573         *len = be32_to_cpup(p);
2574         p = xdr_inline_decode(xdr, *len);
2575         if (unlikely(!p))
2576                 goto out_overflow;
2577         *string = (char *)p;
2578         return 0;
2579 out_overflow:
2580         print_overflow_msg(__func__, xdr);
2581         return -EIO;
2582 }
2583
2584 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2585 {
2586         __be32 *p;
2587
2588         p = xdr_inline_decode(xdr, 8);
2589         if (unlikely(!p))
2590                 goto out_overflow;
2591         hdr->status = be32_to_cpup(p++);
2592         hdr->taglen = be32_to_cpup(p);
2593
2594         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2595         if (unlikely(!p))
2596                 goto out_overflow;
2597         hdr->tag = (char *)p;
2598         p += XDR_QUADLEN(hdr->taglen);
2599         hdr->nops = be32_to_cpup(p);
2600         if (unlikely(hdr->nops < 1))
2601                 return nfs4_stat_to_errno(hdr->status);
2602         return 0;
2603 out_overflow:
2604         print_overflow_msg(__func__, xdr);
2605         return -EIO;
2606 }
2607
2608 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2609 {
2610         __be32 *p;
2611         uint32_t opnum;
2612         int32_t nfserr;
2613
2614         p = xdr_inline_decode(xdr, 8);
2615         if (unlikely(!p))
2616                 goto out_overflow;
2617         opnum = be32_to_cpup(p++);
2618         if (opnum != expected) {
2619                 dprintk("nfs: Server returned operation"
2620                         " %d but we issued a request for %d\n",
2621                                 opnum, expected);
2622                 return -EIO;
2623         }
2624         nfserr = be32_to_cpup(p);
2625         if (nfserr != NFS_OK)
2626                 return nfs4_stat_to_errno(nfserr);
2627         return 0;
2628 out_overflow:
2629         print_overflow_msg(__func__, xdr);
2630         return -EIO;
2631 }
2632
2633 /* Dummy routine */
2634 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2635 {
2636         __be32 *p;
2637         unsigned int strlen;
2638         char *str;
2639
2640         p = xdr_inline_decode(xdr, 12);
2641         if (likely(p))
2642                 return decode_opaque_inline(xdr, &strlen, &str);
2643         print_overflow_msg(__func__, xdr);
2644         return -EIO;
2645 }
2646
2647 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2648 {
2649         uint32_t bmlen;
2650         __be32 *p;
2651
2652         p = xdr_inline_decode(xdr, 4);
2653         if (unlikely(!p))
2654                 goto out_overflow;
2655         bmlen = be32_to_cpup(p);
2656
2657         bitmap[0] = bitmap[1] = 0;
2658         p = xdr_inline_decode(xdr, (bmlen << 2));
2659         if (unlikely(!p))
2660                 goto out_overflow;
2661         if (bmlen > 0) {
2662                 bitmap[0] = be32_to_cpup(p++);
2663                 if (bmlen > 1)
2664                         bitmap[1] = be32_to_cpup(p);
2665         }
2666         return 0;
2667 out_overflow:
2668         print_overflow_msg(__func__, xdr);
2669         return -EIO;
2670 }
2671
2672 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2673 {
2674         __be32 *p;
2675
2676         p = xdr_inline_decode(xdr, 4);
2677         if (unlikely(!p))
2678                 goto out_overflow;
2679         *attrlen = be32_to_cpup(p);
2680         *savep = xdr->p;
2681         return 0;
2682 out_overflow:
2683         print_overflow_msg(__func__, xdr);
2684         return -EIO;
2685 }
2686
2687 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2688 {
2689         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2690                 decode_attr_bitmap(xdr, bitmask);
2691                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2692         } else
2693                 bitmask[0] = bitmask[1] = 0;
2694         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2695         return 0;
2696 }
2697
2698 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2699 {
2700         __be32 *p;
2701         int ret = 0;
2702
2703         *type = 0;
2704         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2705                 return -EIO;
2706         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2707                 p = xdr_inline_decode(xdr, 4);
2708                 if (unlikely(!p))
2709                         goto out_overflow;
2710                 *type = be32_to_cpup(p);
2711                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2712                         dprintk("%s: bad type %d\n", __func__, *type);
2713                         return -EIO;
2714                 }
2715                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2716                 ret = NFS_ATTR_FATTR_TYPE;
2717         }
2718         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2719         return ret;
2720 out_overflow:
2721         print_overflow_msg(__func__, xdr);
2722         return -EIO;
2723 }
2724
2725 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2726 {
2727         __be32 *p;
2728         int ret = 0;
2729
2730         *change = 0;
2731         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2732                 return -EIO;
2733         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2734                 p = xdr_inline_decode(xdr, 8);
2735                 if (unlikely(!p))
2736                         goto out_overflow;
2737                 xdr_decode_hyper(p, change);
2738                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2739                 ret = NFS_ATTR_FATTR_CHANGE;
2740         }
2741         dprintk("%s: change attribute=%Lu\n", __func__,
2742                         (unsigned long long)*change);
2743         return ret;
2744 out_overflow:
2745         print_overflow_msg(__func__, xdr);
2746         return -EIO;
2747 }
2748
2749 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2750 {
2751         __be32 *p;
2752         int ret = 0;
2753
2754         *size = 0;
2755         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2756                 return -EIO;
2757         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2758                 p = xdr_inline_decode(xdr, 8);
2759                 if (unlikely(!p))
2760                         goto out_overflow;
2761                 xdr_decode_hyper(p, size);
2762                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2763                 ret = NFS_ATTR_FATTR_SIZE;
2764         }
2765         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2766         return ret;
2767 out_overflow:
2768         print_overflow_msg(__func__, xdr);
2769         return -EIO;
2770 }
2771
2772 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2773 {
2774         __be32 *p;
2775
2776         *res = 0;
2777         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2778                 return -EIO;
2779         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2780                 p = xdr_inline_decode(xdr, 4);
2781                 if (unlikely(!p))
2782                         goto out_overflow;
2783                 *res = be32_to_cpup(p);
2784                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2785         }
2786         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2787         return 0;
2788 out_overflow:
2789         print_overflow_msg(__func__, xdr);
2790         return -EIO;
2791 }
2792
2793 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2794 {
2795         __be32 *p;
2796
2797         *res = 0;
2798         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2799                 return -EIO;
2800         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2801                 p = xdr_inline_decode(xdr, 4);
2802                 if (unlikely(!p))
2803                         goto out_overflow;
2804                 *res = be32_to_cpup(p);
2805                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2806         }
2807         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2808         return 0;
2809 out_overflow:
2810         print_overflow_msg(__func__, xdr);
2811         return -EIO;
2812 }
2813
2814 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2815 {
2816         __be32 *p;
2817         int ret = 0;
2818
2819         fsid->major = 0;
2820         fsid->minor = 0;
2821         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2822                 return -EIO;
2823         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2824                 p = xdr_inline_decode(xdr, 16);
2825                 if (unlikely(!p))
2826                         goto out_overflow;
2827                 p = xdr_decode_hyper(p, &fsid->major);
2828                 xdr_decode_hyper(p, &fsid->minor);
2829                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2830                 ret = NFS_ATTR_FATTR_FSID;
2831         }
2832         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2833                         (unsigned long long)fsid->major,
2834                         (unsigned long long)fsid->minor);
2835         return ret;
2836 out_overflow:
2837         print_overflow_msg(__func__, xdr);
2838         return -EIO;
2839 }
2840
2841 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2842 {
2843         __be32 *p;
2844
2845         *res = 60;
2846         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2847                 return -EIO;
2848         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2849                 p = xdr_inline_decode(xdr, 4);
2850                 if (unlikely(!p))
2851                         goto out_overflow;
2852                 *res = be32_to_cpup(p);
2853                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2854         }
2855         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2856         return 0;
2857 out_overflow:
2858         print_overflow_msg(__func__, xdr);
2859         return -EIO;
2860 }
2861
2862 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2863 {
2864         __be32 *p;
2865
2866         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2867                 return -EIO;
2868         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2869                 p = xdr_inline_decode(xdr, 4);
2870                 if (unlikely(!p))
2871                         goto out_overflow;
2872                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2873         }
2874         return 0;
2875 out_overflow:
2876         print_overflow_msg(__func__, xdr);
2877         return -EIO;
2878 }
2879
2880 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2881 {
2882         __be32 *p;
2883         int len;
2884
2885         if (fh != NULL)
2886                 memset(fh, 0, sizeof(*fh));
2887
2888         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2889                 return -EIO;
2890         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2891                 p = xdr_inline_decode(xdr, 4);
2892                 if (unlikely(!p))
2893                         goto out_overflow;
2894                 len = be32_to_cpup(p);
2895                 if (len > NFS4_FHSIZE)
2896                         return -EIO;
2897                 p = xdr_inline_decode(xdr, len);
2898                 if (unlikely(!p))
2899                         goto out_overflow;
2900                 if (fh != NULL) {
2901                         memcpy(fh->data, p, len);
2902                         fh->size = len;
2903                 }
2904                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2905         }
2906         return 0;
2907 out_overflow:
2908         print_overflow_msg(__func__, xdr);
2909         return -EIO;
2910 }
2911
2912 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2913 {
2914         __be32 *p;
2915
2916         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2917         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2918                 return -EIO;
2919         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2920                 p = xdr_inline_decode(xdr, 4);
2921                 if (unlikely(!p))
2922                         goto out_overflow;
2923                 *res = be32_to_cpup(p);
2924                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2925         }
2926         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2927         return 0;
2928 out_overflow:
2929         print_overflow_msg(__func__, xdr);
2930         return -EIO;
2931 }
2932
2933 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2934 {
2935         __be32 *p;
2936         int ret = 0;
2937
2938         *fileid = 0;
2939         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2940                 return -EIO;
2941         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2942                 p = xdr_inline_decode(xdr, 8);
2943                 if (unlikely(!p))
2944                         goto out_overflow;
2945                 xdr_decode_hyper(p, fileid);
2946                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2947                 ret = NFS_ATTR_FATTR_FILEID;
2948         }
2949         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2950         return ret;
2951 out_overflow:
2952         print_overflow_msg(__func__, xdr);
2953         return -EIO;
2954 }
2955
2956 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2957 {
2958         __be32 *p;
2959         int ret = 0;
2960
2961         *fileid = 0;
2962         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2963                 return -EIO;
2964         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2965                 p = xdr_inline_decode(xdr, 8);
2966                 if (unlikely(!p))
2967                         goto out_overflow;
2968                 xdr_decode_hyper(p, fileid);
2969                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2970                 ret = NFS_ATTR_FATTR_FILEID;
2971         }
2972         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2973         return ret;
2974 out_overflow:
2975         print_overflow_msg(__func__, xdr);
2976         return -EIO;
2977 }
2978
2979 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2980 {
2981         __be32 *p;
2982         int status = 0;
2983
2984         *res = 0;
2985         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2986                 return -EIO;
2987         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2988                 p = xdr_inline_decode(xdr, 8);
2989                 if (unlikely(!p))
2990                         goto out_overflow;
2991                 xdr_decode_hyper(p, res);
2992                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2993         }
2994         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2995         return status;
2996 out_overflow:
2997         print_overflow_msg(__func__, xdr);
2998         return -EIO;
2999 }
3000
3001 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3002 {
3003         __be32 *p;
3004         int status = 0;
3005
3006         *res = 0;
3007         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3008                 return -EIO;
3009         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3010                 p = xdr_inline_decode(xdr, 8);
3011                 if (unlikely(!p))
3012                         goto out_overflow;
3013                 xdr_decode_hyper(p, res);
3014                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3015         }
3016         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3017         return status;
3018 out_overflow:
3019         print_overflow_msg(__func__, xdr);
3020         return -EIO;
3021 }
3022
3023 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3024 {
3025         __be32 *p;
3026         int status = 0;
3027
3028         *res = 0;
3029         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3030                 return -EIO;
3031         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3032                 p = xdr_inline_decode(xdr, 8);
3033                 if (unlikely(!p))
3034                         goto out_overflow;
3035                 xdr_decode_hyper(p, res);
3036                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3037         }
3038         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3039         return status;
3040 out_overflow:
3041         print_overflow_msg(__func__, xdr);
3042         return -EIO;
3043 }
3044
3045 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3046 {
3047         u32 n;
3048         __be32 *p;
3049         int status = 0;
3050
3051         p = xdr_inline_decode(xdr, 4);
3052         if (unlikely(!p))
3053                 goto out_overflow;
3054         n = be32_to_cpup(p);
3055         if (n == 0)
3056                 goto root_path;
3057         dprintk("path ");
3058         path->ncomponents = 0;
3059         while (path->ncomponents < n) {
3060                 struct nfs4_string *component = &path->components[path->ncomponents];
3061                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3062                 if (unlikely(status != 0))
3063                         goto out_eio;
3064                 if (path->ncomponents != n)
3065                         dprintk("/");
3066                 dprintk("%s", component->data);
3067                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3068                         path->ncomponents++;
3069                 else {
3070                         dprintk("cannot parse %d components in path\n", n);
3071                         goto out_eio;
3072                 }
3073         }
3074 out:
3075         dprintk("\n");
3076         return status;
3077 root_path:
3078 /* a root pathname is sent as a zero component4 */
3079         path->ncomponents = 1;
3080         path->components[0].len=0;
3081         path->components[0].data=NULL;
3082         dprintk("path /\n");
3083         goto out;
3084 out_eio:
3085         dprintk(" status %d", status);
3086         status = -EIO;
3087         goto out;
3088 out_overflow:
3089         print_overflow_msg(__func__, xdr);
3090         return -EIO;
3091 }
3092
3093 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3094 {
3095         int n;
3096         __be32 *p;
3097         int status = -EIO;
3098
3099         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3100                 goto out;
3101         status = 0;
3102         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3103                 goto out;
3104         dprintk("%s: fsroot ", __func__);
3105         status = decode_pathname(xdr, &res->fs_path);
3106         if (unlikely(status != 0))
3107                 goto out;
3108         p = xdr_inline_decode(xdr, 4);
3109         if (unlikely(!p))
3110                 goto out_overflow;
3111         n = be32_to_cpup(p);
3112         if (n <= 0)
3113                 goto out_eio;
3114         res->nlocations = 0;
3115         while (res->nlocations < n) {
3116                 u32 m;
3117                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3118
3119                 p = xdr_inline_decode(xdr, 4);
3120                 if (unlikely(!p))
3121                         goto out_overflow;
3122                 m = be32_to_cpup(p);
3123
3124                 loc->nservers = 0;
3125                 dprintk("%s: servers ", __func__);
3126                 while (loc->nservers < m) {
3127                         struct nfs4_string *server = &loc->servers[loc->nservers];
3128                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3129                         if (unlikely(status != 0))
3130                                 goto out_eio;
3131                         dprintk("%s ", server->data);
3132                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3133                                 loc->nservers++;
3134                         else {
3135                                 unsigned int i;
3136                                 dprintk("%s: using first %u of %u servers "
3137                                         "returned for location %u\n",
3138                                                 __func__,
3139                                                 NFS4_FS_LOCATION_MAXSERVERS,
3140                                                 m, res->nlocations);
3141                                 for (i = loc->nservers; i < m; i++) {
3142                                         unsigned int len;
3143                                         char *data;
3144                                         status = decode_opaque_inline(xdr, &len, &data);
3145                                         if (unlikely(status != 0))
3146                                                 goto out_eio;
3147                                 }
3148                         }
3149                 }
3150                 status = decode_pathname(xdr, &loc->rootpath);
3151                 if (unlikely(status != 0))
3152                         goto out_eio;
3153                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3154                         res->nlocations++;
3155         }
3156         if (res->nlocations != 0)
3157                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3158 out:
3159         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3160         return status;
3161 out_overflow:
3162         print_overflow_msg(__func__, xdr);
3163 out_eio:
3164         status = -EIO;
3165         goto out;
3166 }
3167
3168 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3169 {
3170         __be32 *p;
3171         int status = 0;
3172
3173         *res = 0;
3174         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3175                 return -EIO;
3176         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3177                 p = xdr_inline_decode(xdr, 8);
3178                 if (unlikely(!p))
3179                         goto out_overflow;
3180                 xdr_decode_hyper(p, res);
3181                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3182         }
3183         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3184         return status;
3185 out_overflow:
3186         print_overflow_msg(__func__, xdr);
3187         return -EIO;
3188 }
3189
3190 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3191 {
3192         __be32 *p;
3193         int status = 0;
3194
3195         *maxlink = 1;
3196         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3197                 return -EIO;
3198         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3199                 p = xdr_inline_decode(xdr, 4);
3200                 if (unlikely(!p))
3201                         goto out_overflow;
3202                 *maxlink = be32_to_cpup(p);
3203                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3204         }
3205         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3206         return status;
3207 out_overflow:
3208         print_overflow_msg(__func__, xdr);
3209         return -EIO;
3210 }
3211
3212 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3213 {
3214         __be32 *p;
3215         int status = 0;
3216
3217         *maxname = 1024;
3218         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3219                 return -EIO;
3220         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3221                 p = xdr_inline_decode(xdr, 4);
3222                 if (unlikely(!p))
3223                         goto out_overflow;
3224                 *maxname = be32_to_cpup(p);
3225                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3226         }
3227         dprintk("%s: maxname=%u\n", __func__, *maxname);
3228         return status;
3229 out_overflow:
3230         print_overflow_msg(__func__, xdr);
3231         return -EIO;
3232 }
3233
3234 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3235 {
3236         __be32 *p;
3237         int status = 0;
3238
3239         *res = 1024;
3240         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3241                 return -EIO;
3242         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3243                 uint64_t maxread;
3244                 p = xdr_inline_decode(xdr, 8);
3245                 if (unlikely(!p))
3246                         goto out_overflow;
3247                 xdr_decode_hyper(p, &maxread);
3248                 if (maxread > 0x7FFFFFFF)
3249                         maxread = 0x7FFFFFFF;
3250                 *res = (uint32_t)maxread;
3251                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3252         }
3253         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3254         return status;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3261 {
3262         __be32 *p;
3263         int status = 0;
3264
3265         *res = 1024;
3266         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3267                 return -EIO;
3268         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3269                 uint64_t maxwrite;
3270                 p = xdr_inline_decode(xdr, 8);
3271                 if (unlikely(!p))
3272                         goto out_overflow;
3273                 xdr_decode_hyper(p, &maxwrite);
3274                 if (maxwrite > 0x7FFFFFFF)
3275                         maxwrite = 0x7FFFFFFF;
3276                 *res = (uint32_t)maxwrite;
3277                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3278         }
3279         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3280         return status;
3281 out_overflow:
3282         print_overflow_msg(__func__, xdr);
3283         return -EIO;
3284 }
3285
3286 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3287 {
3288         uint32_t tmp;
3289         __be32 *p;
3290         int ret = 0;
3291
3292         *mode = 0;
3293         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3294                 return -EIO;
3295         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3296                 p = xdr_inline_decode(xdr, 4);
3297                 if (unlikely(!p))
3298                         goto out_overflow;
3299                 tmp = be32_to_cpup(p);
3300                 *mode = tmp & ~S_IFMT;
3301                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3302                 ret = NFS_ATTR_FATTR_MODE;
3303         }
3304         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3305         return ret;
3306 out_overflow:
3307         print_overflow_msg(__func__, xdr);
3308         return -EIO;
3309 }
3310
3311 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3312 {
3313         __be32 *p;
3314         int ret = 0;
3315
3316         *nlink = 1;
3317         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3318                 return -EIO;
3319         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3320                 p = xdr_inline_decode(xdr, 4);
3321                 if (unlikely(!p))
3322                         goto out_overflow;
3323                 *nlink = be32_to_cpup(p);
3324                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3325                 ret = NFS_ATTR_FATTR_NLINK;
3326         }
3327         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3328         return ret;
3329 out_overflow:
3330         print_overflow_msg(__func__, xdr);
3331         return -EIO;
3332 }
3333
3334 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3335                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3336 {
3337         uint32_t len;
3338         __be32 *p;
3339         int ret = 0;
3340
3341         *uid = -2;
3342         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3343                 return -EIO;
3344         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3345                 p = xdr_inline_decode(xdr, 4);
3346                 if (unlikely(!p))
3347                         goto out_overflow;
3348                 len = be32_to_cpup(p);
3349                 p = xdr_inline_decode(xdr, len);
3350                 if (unlikely(!p))
3351                         goto out_overflow;
3352                 if (!may_sleep) {
3353                         /* do nothing */
3354                 } else if (len < XDR_MAX_NETOBJ) {
3355                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3356                                 ret = NFS_ATTR_FATTR_OWNER;
3357                         else
3358                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3359                                                 __func__);
3360                 } else
3361                         dprintk("%s: name too long (%u)!\n",
3362                                         __func__, len);
3363                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3364         }
3365         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3366         return ret;
3367 out_overflow:
3368         print_overflow_msg(__func__, xdr);
3369         return -EIO;
3370 }
3371
3372 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3373                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3374 {
3375         uint32_t len;
3376         __be32 *p;
3377         int ret = 0;
3378
3379         *gid = -2;
3380         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3381                 return -EIO;
3382         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3383                 p = xdr_inline_decode(xdr, 4);
3384                 if (unlikely(!p))
3385                         goto out_overflow;
3386                 len = be32_to_cpup(p);
3387                 p = xdr_inline_decode(xdr, len);
3388                 if (unlikely(!p))
3389                         goto out_overflow;
3390                 if (!may_sleep) {
3391                         /* do nothing */
3392                 } else if (len < XDR_MAX_NETOBJ) {
3393                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3394                                 ret = NFS_ATTR_FATTR_GROUP;
3395                         else
3396                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3397                                                 __func__);
3398                 } else
3399                         dprintk("%s: name too long (%u)!\n",
3400                                         __func__, len);
3401                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3402         }
3403         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3404         return ret;
3405 out_overflow:
3406         print_overflow_msg(__func__, xdr);
3407         return -EIO;
3408 }
3409
3410 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3411 {
3412         uint32_t major = 0, minor = 0;
3413         __be32 *p;
3414         int ret = 0;
3415
3416         *rdev = MKDEV(0,0);
3417         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3418                 return -EIO;
3419         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3420                 dev_t tmp;
3421
3422                 p = xdr_inline_decode(xdr, 8);
3423                 if (unlikely(!p))
3424                         goto out_overflow;
3425                 major = be32_to_cpup(p++);
3426                 minor = be32_to_cpup(p);
3427                 tmp = MKDEV(major, minor);
3428                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3429                         *rdev = tmp;
3430                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3431                 ret = NFS_ATTR_FATTR_RDEV;
3432         }
3433         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3434         return ret;
3435 out_overflow:
3436         print_overflow_msg(__func__, xdr);
3437         return -EIO;
3438 }
3439
3440 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3441 {
3442         __be32 *p;
3443         int status = 0;
3444
3445         *res = 0;
3446         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3447                 return -EIO;
3448         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3449                 p = xdr_inline_decode(xdr, 8);
3450                 if (unlikely(!p))
3451                         goto out_overflow;
3452                 xdr_decode_hyper(p, res);
3453                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3454         }
3455         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3456         return status;
3457 out_overflow:
3458         print_overflow_msg(__func__, xdr);
3459         return -EIO;
3460 }
3461
3462 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3463 {
3464         __be32 *p;
3465         int status = 0;
3466
3467         *res = 0;
3468         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3469                 return -EIO;
3470         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3471                 p = xdr_inline_decode(xdr, 8);
3472                 if (unlikely(!p))
3473                         goto out_overflow;
3474                 xdr_decode_hyper(p, res);
3475                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3476         }
3477         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3478         return status;
3479 out_overflow:
3480         print_overflow_msg(__func__, xdr);
3481         return -EIO;
3482 }
3483
3484 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3485 {
3486         __be32 *p;
3487         int status = 0;
3488
3489         *res = 0;
3490         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3491                 return -EIO;
3492         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3493                 p = xdr_inline_decode(xdr, 8);
3494                 if (unlikely(!p))
3495                         goto out_overflow;
3496                 xdr_decode_hyper(p, res);
3497                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3498         }
3499         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3500         return status;
3501 out_overflow:
3502         print_overflow_msg(__func__, xdr);
3503         return -EIO;
3504 }
3505
3506 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3507 {
3508         __be32 *p;
3509         int ret = 0;
3510
3511         *used = 0;
3512         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3513                 return -EIO;
3514         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3515                 p = xdr_inline_decode(xdr, 8);
3516                 if (unlikely(!p))
3517                         goto out_overflow;
3518                 xdr_decode_hyper(p, used);
3519                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3520                 ret = NFS_ATTR_FATTR_SPACE_USED;
3521         }
3522         dprintk("%s: space used=%Lu\n", __func__,
3523                         (unsigned long long)*used);
3524         return ret;
3525 out_overflow:
3526         print_overflow_msg(__func__, xdr);
3527         return -EIO;
3528 }
3529
3530 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3531 {
3532         __be32 *p;
3533         uint64_t sec;
3534         uint32_t nsec;
3535
3536         p = xdr_inline_decode(xdr, 12);
3537         if (unlikely(!p))
3538                 goto out_overflow;
3539         p = xdr_decode_hyper(p, &sec);
3540         nsec = be32_to_cpup(p);
3541         time->tv_sec = (time_t)sec;
3542         time->tv_nsec = (long)nsec;
3543         return 0;
3544 out_overflow:
3545         print_overflow_msg(__func__, xdr);
3546         return -EIO;
3547 }
3548
3549 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3550 {
3551         int status = 0;
3552
3553         time->tv_sec = 0;
3554         time->tv_nsec = 0;
3555         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3556                 return -EIO;
3557         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3558                 status = decode_attr_time(xdr, time);
3559                 if (status == 0)
3560                         status = NFS_ATTR_FATTR_ATIME;
3561                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3562         }
3563         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3564         return status;
3565 }
3566
3567 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3568 {
3569         int status = 0;
3570
3571         time->tv_sec = 0;
3572         time->tv_nsec = 0;
3573         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3574                 return -EIO;
3575         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3576                 status = decode_attr_time(xdr, time);
3577                 if (status == 0)
3578                         status = NFS_ATTR_FATTR_CTIME;
3579                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3580         }
3581         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3582         return status;
3583 }
3584
3585 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3586                                   struct timespec *time)
3587 {
3588         int status = 0;
3589
3590         time->tv_sec = 0;
3591         time->tv_nsec = 0;
3592         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3593                 return -EIO;
3594         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3595                 status = decode_attr_time(xdr, time);
3596                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3597         }
3598         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3599                 (long)time->tv_nsec);
3600         return status;
3601 }
3602
3603 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3604 {
3605         int status = 0;
3606
3607         time->tv_sec = 0;
3608         time->tv_nsec = 0;
3609         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3610                 return -EIO;
3611         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3612                 status = decode_attr_time(xdr, time);
3613                 if (status == 0)
3614                         status = NFS_ATTR_FATTR_MTIME;
3615                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3616         }
3617         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3618         return status;
3619 }
3620
3621 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3622 {
3623         unsigned int attrwords = XDR_QUADLEN(attrlen);
3624         unsigned int nwords = xdr->p - savep;
3625
3626         if (unlikely(attrwords != nwords)) {
3627                 dprintk("%s: server returned incorrect attribute length: "
3628                         "%u %c %u\n",
3629                                 __func__,
3630                                 attrwords << 2,
3631                                 (attrwords < nwords) ? '<' : '>',
3632                                 nwords << 2);
3633                 return -EIO;
3634         }
3635         return 0;
3636 }
3637
3638 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3639 {
3640         __be32 *p;
3641
3642         p = xdr_inline_decode(xdr, 20);
3643         if (unlikely(!p))
3644                 goto out_overflow;
3645         cinfo->atomic = be32_to_cpup(p++);
3646         p = xdr_decode_hyper(p, &cinfo->before);
3647         xdr_decode_hyper(p, &cinfo->after);
3648         return 0;
3649 out_overflow:
3650         print_overflow_msg(__func__, xdr);
3651         return -EIO;
3652 }
3653
3654 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3655 {
3656         __be32 *p;
3657         uint32_t supp, acc;
3658         int status;
3659
3660         status = decode_op_hdr(xdr, OP_ACCESS);
3661         if (status)
3662                 return status;
3663         p = xdr_inline_decode(xdr, 8);
3664         if (unlikely(!p))
3665                 goto out_overflow;
3666         supp = be32_to_cpup(p++);
3667         acc = be32_to_cpup(p);
3668         access->supported = supp;
3669         access->access = acc;
3670         return 0;
3671 out_overflow:
3672         print_overflow_msg(__func__, xdr);
3673         return -EIO;
3674 }
3675
3676 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3677 {
3678         __be32 *p;
3679
3680         p = xdr_inline_decode(xdr, len);
3681         if (likely(p)) {
3682                 memcpy(buf, p, len);
3683                 return 0;
3684         }
3685         print_overflow_msg(__func__, xdr);
3686         return -EIO;
3687 }
3688
3689 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3690 {
3691         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3692 }
3693
3694 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3695 {
3696         int status;
3697
3698         status = decode_op_hdr(xdr, OP_CLOSE);
3699         if (status != -EIO)
3700                 nfs_increment_open_seqid(status, res->seqid);
3701         if (!status)
3702                 status = decode_stateid(xdr, &res->stateid);
3703         return status;
3704 }
3705
3706 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3707 {
3708         return decode_opaque_fixed(xdr, verifier, 8);
3709 }
3710
3711 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3712 {
3713         int status;
3714
3715         status = decode_op_hdr(xdr, OP_COMMIT);
3716         if (!status)
3717                 status = decode_verifier(xdr, res->verf->verifier);
3718         return status;
3719 }
3720
3721 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3722 {
3723         __be32 *p;
3724         uint32_t bmlen;
3725         int status;
3726
3727         status = decode_op_hdr(xdr, OP_CREATE);
3728         if (status)
3729                 return status;
3730         if ((status = decode_change_info(xdr, cinfo)))
3731                 return status;
3732         p = xdr_inline_decode(xdr, 4);
3733         if (unlikely(!p))
3734                 goto out_overflow;
3735         bmlen = be32_to_cpup(p);
3736         p = xdr_inline_decode(xdr, bmlen << 2);
3737         if (likely(p))
3738                 return 0;
3739 out_overflow:
3740         print_overflow_msg(__func__, xdr);
3741         return -EIO;
3742 }
3743
3744 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3745 {
3746         __be32 *savep;
3747         uint32_t attrlen, bitmap[2] = {0};
3748         int status;
3749
3750         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3751                 goto xdr_error;
3752         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3753                 goto xdr_error;
3754         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3755                 goto xdr_error;
3756         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3757                 goto xdr_error;
3758         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3759                 goto xdr_error;
3760         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3761                 goto xdr_error;
3762         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3763                 goto xdr_error;
3764         status = verify_attr_len(xdr, savep, attrlen);
3765 xdr_error:
3766         dprintk("%s: xdr returned %d!\n", __func__, -status);
3767         return status;
3768 }
3769
3770 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3771 {
3772         __be32 *savep;
3773         uint32_t attrlen, bitmap[2] = {0};
3774         int status;
3775
3776         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3777                 goto xdr_error;
3778         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3779                 goto xdr_error;
3780         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3781                 goto xdr_error;
3782
3783         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3784                 goto xdr_error;
3785         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3786                 goto xdr_error;
3787         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3788                 goto xdr_error;
3789         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3790                 goto xdr_error;
3791         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3792                 goto xdr_error;
3793         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3794                 goto xdr_error;
3795
3796         status = verify_attr_len(xdr, savep, attrlen);
3797 xdr_error:
3798         dprintk("%s: xdr returned %d!\n", __func__, -status);
3799         return status;
3800 }
3801
3802 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3803 {
3804         __be32 *savep;
3805         uint32_t attrlen, bitmap[2] = {0};
3806         int status;
3807
3808         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3809                 goto xdr_error;
3810         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3811                 goto xdr_error;
3812         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3813                 goto xdr_error;
3814
3815         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3816                 goto xdr_error;
3817         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3818                 goto xdr_error;
3819
3820         status = verify_attr_len(xdr, savep, attrlen);
3821 xdr_error:
3822         dprintk("%s: xdr returned %d!\n", __func__, -status);
3823         return status;
3824 }
3825
3826 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3827                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3828                 const struct nfs_server *server, int may_sleep)
3829 {
3830         int status;
3831         umode_t fmode = 0;
3832         uint64_t fileid;
3833         uint32_t type;
3834
3835         status = decode_attr_type(xdr, bitmap, &type);
3836         if (status < 0)
3837                 goto xdr_error;
3838         fattr->mode = 0;
3839         if (status != 0) {
3840                 fattr->mode |= nfs_type2fmt[type];
3841                 fattr->valid |= status;
3842         }
3843
3844         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3845         if (status < 0)
3846                 goto xdr_error;
3847         fattr->valid |= status;
3848
3849         status = decode_attr_size(xdr, bitmap, &fattr->size);
3850         if (status < 0)
3851                 goto xdr_error;
3852         fattr->valid |= status;
3853
3854         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3855         if (status < 0)
3856                 goto xdr_error;
3857         fattr->valid |= status;
3858
3859         status = decode_attr_error(xdr, bitmap);
3860         if (status < 0)
3861                 goto xdr_error;
3862
3863         status = decode_attr_filehandle(xdr, bitmap, fh);
3864         if (status < 0)
3865                 goto xdr_error;
3866
3867         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3868         if (status < 0)
3869                 goto xdr_error;
3870         fattr->valid |= status;
3871
3872         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3873                                                 struct nfs4_fs_locations,
3874                                                 fattr));
3875         if (status < 0)
3876                 goto xdr_error;
3877         fattr->valid |= status;
3878
3879         status = decode_attr_mode(xdr, bitmap, &fmode);
3880         if (status < 0)
3881                 goto xdr_error;
3882         if (status != 0) {
3883                 fattr->mode |= fmode;
3884                 fattr->valid |= status;
3885         }
3886
3887         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3888         if (status < 0)
3889                 goto xdr_error;
3890         fattr->valid |= status;
3891
3892         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3893                         &fattr->uid, may_sleep);
3894         if (status < 0)
3895                 goto xdr_error;
3896         fattr->valid |= status;
3897
3898         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3899                         &fattr->gid, may_sleep);
3900         if (status < 0)
3901                 goto xdr_error;
3902         fattr->valid |= status;
3903
3904         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3905         if (status < 0)
3906                 goto xdr_error;
3907         fattr->valid |= status;
3908
3909         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3910         if (status < 0)
3911                 goto xdr_error;
3912         fattr->valid |= status;
3913
3914         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3915         if (status < 0)
3916                 goto xdr_error;
3917         fattr->valid |= status;
3918
3919         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3920         if (status < 0)
3921                 goto xdr_error;
3922         fattr->valid |= status;
3923
3924         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3925         if (status < 0)
3926                 goto xdr_error;
3927         fattr->valid |= status;
3928
3929         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3930         if (status < 0)
3931                 goto xdr_error;
3932         if (status != 0 && !(fattr->valid & status)) {
3933                 fattr->fileid = fileid;
3934                 fattr->valid |= status;
3935         }
3936
3937 xdr_error:
3938         dprintk("%s: xdr returned %d\n", __func__, -status);
3939         return status;
3940 }
3941
3942 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3943                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3944 {
3945         __be32 *savep;
3946         uint32_t attrlen,
3947                  bitmap[2] = {0};
3948         int status;
3949
3950         status = decode_op_hdr(xdr, OP_GETATTR);
3951         if (status < 0)
3952                 goto xdr_error;
3953
3954         status = decode_attr_bitmap(xdr, bitmap);
3955         if (status < 0)
3956                 goto xdr_error;
3957
3958         status = decode_attr_length(xdr, &attrlen, &savep);
3959         if (status < 0)
3960                 goto xdr_error;
3961
3962         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
3963         if (status < 0)
3964                 goto xdr_error;
3965
3966         status = verify_attr_len(xdr, savep, attrlen);
3967 xdr_error:
3968         dprintk("%s: xdr returned %d\n", __func__, -status);
3969         return status;
3970 }
3971
3972 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3973                 const struct nfs_server *server, int may_sleep)
3974 {
3975         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
3976 }
3977
3978 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3979 {
3980         __be32 *savep;
3981         uint32_t attrlen, bitmap[2];
3982         int status;
3983
3984         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3985                 goto xdr_error;
3986         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3987                 goto xdr_error;
3988         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3989                 goto xdr_error;
3990
3991         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3992
3993         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3994                 goto xdr_error;
3995         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3996                 goto xdr_error;
3997         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3998                 goto xdr_error;
3999         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4000         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4001                 goto xdr_error;
4002         fsinfo->wtpref = fsinfo->wtmax;
4003         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4004         if (status != 0)
4005                 goto xdr_error;
4006
4007         status = verify_attr_len(xdr, savep, attrlen);
4008 xdr_error:
4009         dprintk("%s: xdr returned %d!\n", __func__, -status);
4010         return status;
4011 }
4012
4013 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4014 {
4015         __be32 *p;
4016         uint32_t len;
4017         int status;
4018
4019         /* Zero handle first to allow comparisons */
4020         memset(fh, 0, sizeof(*fh));
4021
4022         status = decode_op_hdr(xdr, OP_GETFH);
4023         if (status)
4024                 return status;
4025
4026         p = xdr_inline_decode(xdr, 4);
4027         if (unlikely(!p))
4028                 goto out_overflow;
4029         len = be32_to_cpup(p);
4030         if (len > NFS4_FHSIZE)
4031                 return -EIO;
4032         fh->size = len;
4033         p = xdr_inline_decode(xdr, len);
4034         if (unlikely(!p))
4035                 goto out_overflow;
4036         memcpy(fh->data, p, len);
4037         return 0;
4038 out_overflow:
4039         print_overflow_msg(__func__, xdr);
4040         return -EIO;
4041 }
4042
4043 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4044 {
4045         int status;
4046
4047         status = decode_op_hdr(xdr, OP_LINK);
4048         if (status)
4049                 return status;
4050         return decode_change_info(xdr, cinfo);
4051 }
4052
4053 /*
4054  * We create the owner, so we know a proper owner.id length is 4.
4055  */
4056 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4057 {
4058         uint64_t offset, length, clientid;
4059         __be32 *p;
4060         uint32_t namelen, type;
4061
4062         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4063         if (unlikely(!p))
4064                 goto out_overflow;
4065         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4066         p = xdr_decode_hyper(p, &length);
4067         type = be32_to_cpup(p++); /* 4 byte read */
4068         if (fl != NULL) { /* manipulate file lock */
4069                 fl->fl_start = (loff_t)offset;
4070                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4071                 if (length == ~(uint64_t)0)
4072                         fl->fl_end = OFFSET_MAX;
4073                 fl->fl_type = F_WRLCK;
4074                 if (type & 1)
4075                         fl->fl_type = F_RDLCK;
4076                 fl->fl_pid = 0;
4077         }
4078         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4079         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4080         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4081         if (likely(p))
4082                 return -NFS4ERR_DENIED;
4083 out_overflow:
4084         print_overflow_msg(__func__, xdr);
4085         return -EIO;
4086 }
4087
4088 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4089 {
4090         int status;
4091
4092         status = decode_op_hdr(xdr, OP_LOCK);
4093         if (status == -EIO)
4094                 goto out;
4095         if (status == 0) {
4096                 status = decode_stateid(xdr, &res->stateid);
4097                 if (unlikely(status))
4098                         goto out;
4099         } else if (status == -NFS4ERR_DENIED)
4100                 status = decode_lock_denied(xdr, NULL);
4101         if (res->open_seqid != NULL)
4102                 nfs_increment_open_seqid(status, res->open_seqid);
4103         nfs_increment_lock_seqid(status, res->lock_seqid);
4104 out:
4105         return status;
4106 }
4107
4108 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4109 {
4110         int status;
4111         status = decode_op_hdr(xdr, OP_LOCKT);
4112         if (status == -NFS4ERR_DENIED)
4113                 return decode_lock_denied(xdr, res->denied);
4114         return status;
4115 }
4116
4117 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4118 {
4119         int status;
4120
4121         status = decode_op_hdr(xdr, OP_LOCKU);
4122         if (status != -EIO)
4123                 nfs_increment_lock_seqid(status, res->seqid);
4124         if (status == 0)
4125                 status = decode_stateid(xdr, &res->stateid);
4126         return status;
4127 }
4128
4129 static int decode_release_lockowner(struct xdr_stream *xdr)
4130 {
4131         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4132 }
4133
4134 static int decode_lookup(struct xdr_stream *xdr)
4135 {
4136         return decode_op_hdr(xdr, OP_LOOKUP);
4137 }
4138
4139 /* This is too sick! */
4140 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4141 {
4142         __be32 *p;
4143         uint32_t limit_type, nblocks, blocksize;
4144
4145         p = xdr_inline_decode(xdr, 12);
4146         if (unlikely(!p))
4147                 goto out_overflow;
4148         limit_type = be32_to_cpup(p++);
4149         switch (limit_type) {
4150         case 1:
4151                 xdr_decode_hyper(p, maxsize);
4152                 break;
4153         case 2:
4154                 nblocks = be32_to_cpup(p++);
4155                 blocksize = be32_to_cpup(p);
4156                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4157         }
4158         return 0;
4159 out_overflow:
4160         print_overflow_msg(__func__, xdr);
4161         return -EIO;
4162 }
4163
4164 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4165 {
4166         __be32 *p;
4167         uint32_t delegation_type;
4168         int status;
4169
4170         p = xdr_inline_decode(xdr, 4);
4171         if (unlikely(!p))
4172                 goto out_overflow;
4173         delegation_type = be32_to_cpup(p);
4174         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4175                 res->delegation_type = 0;
4176                 return 0;
4177         }
4178         status = decode_stateid(xdr, &res->delegation);
4179         if (unlikely(status))
4180                 return status;
4181         p = xdr_inline_decode(xdr, 4);
4182         if (unlikely(!p))
4183                 goto out_overflow;
4184         res->do_recall = be32_to_cpup(p);
4185
4186         switch (delegation_type) {
4187         case NFS4_OPEN_DELEGATE_READ:
4188                 res->delegation_type = FMODE_READ;
4189                 break;
4190         case NFS4_OPEN_DELEGATE_WRITE:
4191                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4192                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4193                                 return -EIO;
4194         }
4195         return decode_ace(xdr, NULL, res->server->nfs_client);
4196 out_overflow:
4197         print_overflow_msg(__func__, xdr);
4198         return -EIO;
4199 }
4200
4201 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4202 {
4203         __be32 *p;
4204         uint32_t savewords, bmlen, i;
4205         int status;
4206
4207         status = decode_op_hdr(xdr, OP_OPEN);
4208         if (status != -EIO)
4209                 nfs_increment_open_seqid(status, res->seqid);
4210         if (!status)
4211                 status = decode_stateid(xdr, &res->stateid);
4212         if (unlikely(status))
4213                 return status;
4214
4215         decode_change_info(xdr, &res->cinfo);
4216
4217         p = xdr_inline_decode(xdr, 8);
4218         if (unlikely(!p))
4219                 goto out_overflow;
4220         res->rflags = be32_to_cpup(p++);
4221         bmlen = be32_to_cpup(p);
4222         if (bmlen > 10)
4223                 goto xdr_error;
4224
4225         p = xdr_inline_decode(xdr, bmlen << 2);
4226         if (unlikely(!p))
4227                 goto out_overflow;
4228         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4229         for (i = 0; i < savewords; ++i)
4230                 res->attrset[i] = be32_to_cpup(p++);
4231         for (; i < NFS4_BITMAP_SIZE; i++)
4232                 res->attrset[i] = 0;
4233
4234         return decode_delegation(xdr, res);
4235 xdr_error:
4236         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4237         return -EIO;
4238 out_overflow:
4239         print_overflow_msg(__func__, xdr);
4240         return -EIO;
4241 }
4242
4243 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4244 {
4245         int status;
4246
4247         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4248         if (status != -EIO)
4249                 nfs_increment_open_seqid(status, res->seqid);
4250         if (!status)
4251                 status = decode_stateid(xdr, &res->stateid);
4252         return status;
4253 }
4254
4255 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4256 {
4257         int status;
4258
4259         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4260         if (status != -EIO)
4261                 nfs_increment_open_seqid(status, res->seqid);
4262         if (!status)
4263                 status = decode_stateid(xdr, &res->stateid);
4264         return status;
4265 }
4266
4267 static int decode_putfh(struct xdr_stream *xdr)
4268 {
4269         return decode_op_hdr(xdr, OP_PUTFH);
4270 }
4271
4272 static int decode_putrootfh(struct xdr_stream *xdr)
4273 {
4274         return decode_op_hdr(xdr, OP_PUTROOTFH);
4275 }
4276
4277 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4278 {
4279         struct kvec *iov = req->rq_rcv_buf.head;
4280         __be32 *p;
4281         uint32_t count, eof, recvd, hdrlen;
4282         int status;
4283
4284         status = decode_op_hdr(xdr, OP_READ);
4285         if (status)
4286                 return status;
4287         p = xdr_inline_decode(xdr, 8);
4288         if (unlikely(!p))
4289                 goto out_overflow;
4290         eof = be32_to_cpup(p++);
4291         count = be32_to_cpup(p);
4292         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4293         recvd = req->rq_rcv_buf.len - hdrlen;
4294         if (count > recvd) {
4295                 dprintk("NFS: server cheating in read reply: "
4296                                 "count %u > recvd %u\n", count, recvd);
4297                 count = recvd;
4298                 eof = 0;
4299         }
4300         xdr_read_pages(xdr, count);
4301         res->eof = eof;
4302         res->count = count;
4303         return 0;
4304 out_overflow:
4305         print_overflow_msg(__func__, xdr);
4306         return -EIO;
4307 }
4308
4309 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4310 {
4311         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4312         struct kvec     *iov = rcvbuf->head;
4313         size_t          hdrlen;
4314         u32             recvd, pglen = rcvbuf->page_len;
4315         int             status;
4316
4317         status = decode_op_hdr(xdr, OP_READDIR);
4318         if (!status)
4319                 status = decode_verifier(xdr, readdir->verifier.data);
4320         if (unlikely(status))
4321                 return status;
4322         dprintk("%s: verifier = %08x:%08x\n",
4323                         __func__,
4324                         ((u32 *)readdir->verifier.data)[0],
4325                         ((u32 *)readdir->verifier.data)[1]);
4326
4327
4328         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4329         recvd = rcvbuf->len - hdrlen;
4330         if (pglen > recvd)
4331                 pglen = recvd;
4332         xdr_read_pages(xdr, pglen);
4333
4334
4335         return 0;
4336 }
4337
4338 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4339 {
4340         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4341         struct kvec *iov = rcvbuf->head;
4342         size_t hdrlen;
4343         u32 len, recvd;
4344         __be32 *p;
4345         int status;
4346
4347         status = decode_op_hdr(xdr, OP_READLINK);
4348         if (status)
4349                 return status;
4350
4351         /* Convert length of symlink */
4352         p = xdr_inline_decode(xdr, 4);
4353         if (unlikely(!p))
4354                 goto out_overflow;
4355         len = be32_to_cpup(p);
4356         if (len >= rcvbuf->page_len || len <= 0) {
4357                 dprintk("nfs: server returned giant symlink!\n");
4358                 return -ENAMETOOLONG;
4359         }
4360         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4361         recvd = req->rq_rcv_buf.len - hdrlen;
4362         if (recvd < len) {
4363                 dprintk("NFS: server cheating in readlink reply: "
4364                                 "count %u > recvd %u\n", len, recvd);
4365                 return -EIO;
4366         }
4367         xdr_read_pages(xdr, len);
4368         /*
4369          * The XDR encode routine has set things up so that
4370          * the link text will be copied directly into the
4371          * buffer.  We just have to do overflow-checking,
4372          * and and null-terminate the text (the VFS expects
4373          * null-termination).
4374          */
4375         xdr_terminate_string(rcvbuf, len);
4376         return 0;
4377 out_overflow:
4378         print_overflow_msg(__func__, xdr);
4379         return -EIO;
4380 }
4381
4382 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4383 {
4384         int status;
4385
4386         status = decode_op_hdr(xdr, OP_REMOVE);
4387         if (status)
4388                 goto out;
4389         status = decode_change_info(xdr, cinfo);
4390 out:
4391         return status;
4392 }
4393
4394 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4395               struct nfs4_change_info *new_cinfo)
4396 {
4397         int status;
4398
4399         status = decode_op_hdr(xdr, OP_RENAME);
4400         if (status)
4401                 goto out;
4402         if ((status = decode_change_info(xdr, old_cinfo)))
4403                 goto out;
4404         status = decode_change_info(xdr, new_cinfo);
4405 out:
4406         return status;
4407 }
4408
4409 static int decode_renew(struct xdr_stream *xdr)
4410 {
4411         return decode_op_hdr(xdr, OP_RENEW);
4412 }
4413
4414 static int
4415 decode_restorefh(struct xdr_stream *xdr)
4416 {
4417         return decode_op_hdr(xdr, OP_RESTOREFH);
4418 }
4419
4420 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4421                 size_t *acl_len)
4422 {
4423         __be32 *savep;
4424         uint32_t attrlen,
4425                  bitmap[2] = {0};
4426         struct kvec *iov = req->rq_rcv_buf.head;
4427         int status;
4428
4429         *acl_len = 0;
4430         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4431                 goto out;
4432         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4433                 goto out;
4434         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4435                 goto out;
4436
4437         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4438                 return -EIO;
4439         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4440                 size_t hdrlen;
4441                 u32 recvd;
4442
4443                 /* We ignore &savep and don't do consistency checks on
4444                  * the attr length.  Let userspace figure it out.... */
4445                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4446                 recvd = req->rq_rcv_buf.len - hdrlen;
4447                 if (attrlen > recvd) {
4448                         dprintk("NFS: server cheating in getattr"
4449                                         " acl reply: attrlen %u > recvd %u\n",
4450                                         attrlen, recvd);
4451                         return -EINVAL;
4452                 }
4453                 xdr_read_pages(xdr, attrlen);
4454                 *acl_len = attrlen;
4455         } else
4456                 status = -EOPNOTSUPP;
4457
4458 out:
4459         return status;
4460 }
4461
4462 static int
4463 decode_savefh(struct xdr_stream *xdr)
4464 {
4465         return decode_op_hdr(xdr, OP_SAVEFH);
4466 }
4467
4468 static int decode_setattr(struct xdr_stream *xdr)
4469 {
4470         __be32 *p;
4471         uint32_t bmlen;
4472         int status;
4473
4474         status = decode_op_hdr(xdr, OP_SETATTR);
4475         if (status)
4476                 return status;
4477         p = xdr_inline_decode(xdr, 4);
4478         if (unlikely(!p))
4479                 goto out_overflow;
4480         bmlen = be32_to_cpup(p);
4481         p = xdr_inline_decode(xdr, bmlen << 2);
4482         if (likely(p))
4483                 return 0;
4484 out_overflow:
4485         print_overflow_msg(__func__, xdr);
4486         return -EIO;
4487 }
4488
4489 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4490 {
4491         __be32 *p;
4492         uint32_t opnum;
4493         int32_t nfserr;
4494
4495         p = xdr_inline_decode(xdr, 8);
4496         if (unlikely(!p))
4497                 goto out_overflow;
4498         opnum = be32_to_cpup(p++);
4499         if (opnum != OP_SETCLIENTID) {
4500                 dprintk("nfs: decode_setclientid: Server returned operation"
4501                         " %d\n", opnum);
4502                 return -EIO;
4503         }
4504         nfserr = be32_to_cpup(p);
4505         if (nfserr == NFS_OK) {
4506                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4507                 if (unlikely(!p))
4508                         goto out_overflow;
4509                 p = xdr_decode_hyper(p, &res->clientid);
4510                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4511         } else if (nfserr == NFSERR_CLID_INUSE) {
4512                 uint32_t len;
4513
4514                 /* skip netid string */
4515                 p = xdr_inline_decode(xdr, 4);
4516                 if (unlikely(!p))
4517                         goto out_overflow;
4518                 len = be32_to_cpup(p);
4519                 p = xdr_inline_decode(xdr, len);
4520                 if (unlikely(!p))
4521                         goto out_overflow;
4522
4523                 /* skip uaddr string */
4524                 p = xdr_inline_decode(xdr, 4);
4525                 if (unlikely(!p))
4526                         goto out_overflow;
4527                 len = be32_to_cpup(p);
4528                 p = xdr_inline_decode(xdr, len);
4529                 if (unlikely(!p))
4530                         goto out_overflow;
4531                 return -NFSERR_CLID_INUSE;
4532         } else
4533                 return nfs4_stat_to_errno(nfserr);
4534
4535         return 0;
4536 out_overflow:
4537         print_overflow_msg(__func__, xdr);
4538         return -EIO;
4539 }
4540
4541 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4542 {
4543         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4544 }
4545
4546 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4547 {
4548         __be32 *p;
4549         int status;
4550
4551         status = decode_op_hdr(xdr, OP_WRITE);
4552         if (status)
4553                 return status;
4554
4555         p = xdr_inline_decode(xdr, 16);
4556         if (unlikely(!p))
4557                 goto out_overflow;
4558         res->count = be32_to_cpup(p++);
4559         res->verf->committed = be32_to_cpup(p++);
4560         memcpy(res->verf->verifier, p, 8);
4561         return 0;
4562 out_overflow:
4563         print_overflow_msg(__func__, xdr);
4564         return -EIO;
4565 }
4566
4567 static int decode_delegreturn(struct xdr_stream *xdr)
4568 {
4569         return decode_op_hdr(xdr, OP_DELEGRETURN);
4570 }
4571
4572 #if defined(CONFIG_NFS_V4_1)
4573 static int decode_exchange_id(struct xdr_stream *xdr,
4574                               struct nfs41_exchange_id_res *res)
4575 {
4576         __be32 *p;
4577         uint32_t dummy;
4578         char *dummy_str;
4579         int status;
4580         struct nfs_client *clp = res->client;
4581
4582         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4583         if (status)
4584                 return status;
4585
4586         p = xdr_inline_decode(xdr, 8);
4587         if (unlikely(!p))
4588                 goto out_overflow;
4589         xdr_decode_hyper(p, &clp->cl_ex_clid);
4590         p = xdr_inline_decode(xdr, 12);
4591         if (unlikely(!p))
4592                 goto out_overflow;
4593         clp->cl_seqid = be32_to_cpup(p++);
4594         clp->cl_exchange_flags = be32_to_cpup(p++);
4595
4596         /* We ask for SP4_NONE */
4597         dummy = be32_to_cpup(p);
4598         if (dummy != SP4_NONE)
4599                 return -EIO;
4600
4601         /* Throw away minor_id */
4602         p = xdr_inline_decode(xdr, 8);
4603         if (unlikely(!p))
4604                 goto out_overflow;
4605
4606         /* Throw away Major id */
4607         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4608         if (unlikely(status))
4609                 return status;
4610
4611         /* Throw away server_scope */
4612         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4613         if (unlikely(status))
4614                 return status;
4615
4616         /* Throw away Implementation id array */
4617         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4618         if (unlikely(status))
4619                 return status;
4620
4621         return 0;
4622 out_overflow:
4623         print_overflow_msg(__func__, xdr);
4624         return -EIO;
4625 }
4626
4627 static int decode_chan_attrs(struct xdr_stream *xdr,
4628                              struct nfs4_channel_attrs *attrs)
4629 {
4630         __be32 *p;
4631         u32 nr_attrs;
4632
4633         p = xdr_inline_decode(xdr, 28);
4634         if (unlikely(!p))
4635                 goto out_overflow;
4636         attrs->headerpadsz = be32_to_cpup(p++);
4637         attrs->max_rqst_sz = be32_to_cpup(p++);
4638         attrs->max_resp_sz = be32_to_cpup(p++);
4639         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4640         attrs->max_ops = be32_to_cpup(p++);
4641         attrs->max_reqs = be32_to_cpup(p++);
4642         nr_attrs = be32_to_cpup(p);
4643         if (unlikely(nr_attrs > 1)) {
4644                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4645                         __func__, nr_attrs);
4646                 return -EINVAL;
4647         }
4648         if (nr_attrs == 1) {
4649                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4650                 if (unlikely(!p))
4651                         goto out_overflow;
4652         }
4653         return 0;
4654 out_overflow:
4655         print_overflow_msg(__func__, xdr);
4656         return -EIO;
4657 }
4658
4659 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4660 {
4661         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4662 }
4663
4664 static int decode_create_session(struct xdr_stream *xdr,
4665                                  struct nfs41_create_session_res *res)
4666 {
4667         __be32 *p;
4668         int status;
4669         struct nfs_client *clp = res->client;
4670         struct nfs4_session *session = clp->cl_session;
4671
4672         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4673         if (!status)
4674                 status = decode_sessionid(xdr, &session->sess_id);
4675         if (unlikely(status))
4676                 return status;
4677
4678         /* seqid, flags */
4679         p = xdr_inline_decode(xdr, 8);
4680         if (unlikely(!p))
4681                 goto out_overflow;
4682         clp->cl_seqid = be32_to_cpup(p++);
4683         session->flags = be32_to_cpup(p);
4684
4685         /* Channel attributes */
4686         status = decode_chan_attrs(xdr, &session->fc_attrs);
4687         if (!status)
4688                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4689         return status;
4690 out_overflow:
4691         print_overflow_msg(__func__, xdr);
4692         return -EIO;
4693 }
4694
4695 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4696 {
4697         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4698 }
4699
4700 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4701 {
4702         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4703 }
4704 #endif /* CONFIG_NFS_V4_1 */
4705
4706 static int decode_sequence(struct xdr_stream *xdr,
4707                            struct nfs4_sequence_res *res,
4708                            struct rpc_rqst *rqstp)
4709 {
4710 #if defined(CONFIG_NFS_V4_1)
4711         struct nfs4_sessionid id;
4712         u32 dummy;
4713         int status;
4714         __be32 *p;
4715
4716         if (!res->sr_session)
4717                 return 0;
4718
4719         status = decode_op_hdr(xdr, OP_SEQUENCE);
4720         if (!status)
4721                 status = decode_sessionid(xdr, &id);
4722         if (unlikely(status))
4723                 goto out_err;
4724
4725         /*
4726          * If the server returns different values for sessionID, slotID or
4727          * sequence number, the server is looney tunes.
4728          */
4729         status = -EREMOTEIO;
4730
4731         if (memcmp(id.data, res->sr_session->sess_id.data,
4732                    NFS4_MAX_SESSIONID_LEN)) {
4733                 dprintk("%s Invalid session id\n", __func__);
4734                 goto out_err;
4735         }
4736
4737         p = xdr_inline_decode(xdr, 20);
4738         if (unlikely(!p))
4739                 goto out_overflow;
4740
4741         /* seqid */
4742         dummy = be32_to_cpup(p++);
4743         if (dummy != res->sr_slot->seq_nr) {
4744                 dprintk("%s Invalid sequence number\n", __func__);
4745                 goto out_err;
4746         }
4747         /* slot id */
4748         dummy = be32_to_cpup(p++);
4749         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4750                 dprintk("%s Invalid slot id\n", __func__);
4751                 goto out_err;
4752         }
4753         /* highest slot id - currently not processed */
4754         dummy = be32_to_cpup(p++);
4755         /* target highest slot id - currently not processed */
4756         dummy = be32_to_cpup(p++);
4757         /* result flags */
4758         res->sr_status_flags = be32_to_cpup(p);
4759         status = 0;
4760 out_err:
4761         res->sr_status = status;
4762         return status;
4763 out_overflow:
4764         print_overflow_msg(__func__, xdr);
4765         status = -EIO;
4766         goto out_err;
4767 #else  /* CONFIG_NFS_V4_1 */
4768         return 0;
4769 #endif /* CONFIG_NFS_V4_1 */
4770 }
4771
4772 /*
4773  * END OF "GENERIC" DECODE ROUTINES.
4774  */
4775
4776 /*
4777  * Decode OPEN_DOWNGRADE response
4778  */
4779 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *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         status = decode_putfh(&xdr);
4793         if (status)
4794                 goto out;
4795         status = decode_open_downgrade(&xdr, res);
4796         if (status != 0)
4797                 goto out;
4798         decode_getfattr(&xdr, res->fattr, res->server,
4799                         !RPC_IS_ASYNC(rqstp->rq_task));
4800 out:
4801         return status;
4802 }
4803
4804 /*
4805  * Decode ACCESS response
4806  */
4807 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4808 {
4809         struct xdr_stream xdr;
4810         struct compound_hdr hdr;
4811         int status;
4812
4813         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4814         status = decode_compound_hdr(&xdr, &hdr);
4815         if (status)
4816                 goto out;
4817         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4818         if (status)
4819                 goto out;
4820         status = decode_putfh(&xdr);
4821         if (status != 0)
4822                 goto out;
4823         status = decode_access(&xdr, res);
4824         if (status != 0)
4825                 goto out;
4826         decode_getfattr(&xdr, res->fattr, res->server,
4827                         !RPC_IS_ASYNC(rqstp->rq_task));
4828 out:
4829         return status;
4830 }
4831
4832 /*
4833  * Decode LOOKUP response
4834  */
4835 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4836 {
4837         struct xdr_stream xdr;
4838         struct compound_hdr hdr;
4839         int status;
4840
4841         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4842         status = decode_compound_hdr(&xdr, &hdr);
4843         if (status)
4844                 goto out;
4845         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4846         if (status)
4847                 goto out;
4848         if ((status = decode_putfh(&xdr)) != 0)
4849                 goto out;
4850         if ((status = decode_lookup(&xdr)) != 0)
4851                 goto out;
4852         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4853                 goto out;
4854         status = decode_getfattr(&xdr, res->fattr, res->server
4855                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4856 out:
4857         return status;
4858 }
4859
4860 /*
4861  * Decode LOOKUP_ROOT response
4862  */
4863 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4864 {
4865         struct xdr_stream xdr;
4866         struct compound_hdr hdr;
4867         int status;
4868
4869         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4870         status = decode_compound_hdr(&xdr, &hdr);
4871         if (status)
4872                 goto out;
4873         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4874         if (status)
4875                 goto out;
4876         if ((status = decode_putrootfh(&xdr)) != 0)
4877                 goto out;
4878         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4879                 status = decode_getfattr(&xdr, res->fattr, res->server,
4880                                 !RPC_IS_ASYNC(rqstp->rq_task));
4881 out:
4882         return status;
4883 }
4884
4885 /*
4886  * Decode REMOVE response
4887  */
4888 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4889 {
4890         struct xdr_stream xdr;
4891         struct compound_hdr hdr;
4892         int status;
4893
4894         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4895         status = decode_compound_hdr(&xdr, &hdr);
4896         if (status)
4897                 goto out;
4898         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4899         if (status)
4900                 goto out;
4901         if ((status = decode_putfh(&xdr)) != 0)
4902                 goto out;
4903         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4904                 goto out;
4905         decode_getfattr(&xdr, res->dir_attr, res->server,
4906                         !RPC_IS_ASYNC(rqstp->rq_task));
4907 out:
4908         return status;
4909 }
4910
4911 /*
4912  * Decode RENAME response
4913  */
4914 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
4915 {
4916         struct xdr_stream xdr;
4917         struct compound_hdr hdr;
4918         int status;
4919
4920         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4921         status = decode_compound_hdr(&xdr, &hdr);
4922         if (status)
4923                 goto out;
4924         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4925         if (status)
4926                 goto out;
4927         if ((status = decode_putfh(&xdr)) != 0)
4928                 goto out;
4929         if ((status = decode_savefh(&xdr)) != 0)
4930                 goto out;
4931         if ((status = decode_putfh(&xdr)) != 0)
4932                 goto out;
4933         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4934                 goto out;
4935         /* Current FH is target directory */
4936         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4937                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4938                 goto out;
4939         if ((status = decode_restorefh(&xdr)) != 0)
4940                 goto out;
4941         decode_getfattr(&xdr, res->old_fattr, res->server,
4942                         !RPC_IS_ASYNC(rqstp->rq_task));
4943 out:
4944         return status;
4945 }
4946
4947 /*
4948  * Decode LINK response
4949  */
4950 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4951 {
4952         struct xdr_stream xdr;
4953         struct compound_hdr hdr;
4954         int status;
4955
4956         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4957         status = decode_compound_hdr(&xdr, &hdr);
4958         if (status)
4959                 goto out;
4960         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4961         if (status)
4962                 goto out;
4963         if ((status = decode_putfh(&xdr)) != 0)
4964                 goto out;
4965         if ((status = decode_savefh(&xdr)) != 0)
4966                 goto out;
4967         if ((status = decode_putfh(&xdr)) != 0)
4968                 goto out;
4969         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4970                 goto out;
4971         /*
4972          * Note order: OP_LINK leaves the directory as the current
4973          *             filehandle.
4974          */
4975         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4976                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4977                 goto out;
4978         if ((status = decode_restorefh(&xdr)) != 0)
4979                 goto out;
4980         decode_getfattr(&xdr, res->fattr, res->server,
4981                         !RPC_IS_ASYNC(rqstp->rq_task));
4982 out:
4983         return status;
4984 }
4985
4986 /*
4987  * Decode CREATE response
4988  */
4989 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4990 {
4991         struct xdr_stream xdr;
4992         struct compound_hdr hdr;
4993         int status;
4994
4995         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4996         status = decode_compound_hdr(&xdr, &hdr);
4997         if (status)
4998                 goto out;
4999         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5000         if (status)
5001                 goto out;
5002         if ((status = decode_putfh(&xdr)) != 0)
5003                 goto out;
5004         if ((status = decode_savefh(&xdr)) != 0)
5005                 goto out;
5006         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
5007                 goto out;
5008         if ((status = decode_getfh(&xdr, res->fh)) != 0)
5009                 goto out;
5010         if (decode_getfattr(&xdr, res->fattr, res->server,
5011                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5012                 goto out;
5013         if ((status = decode_restorefh(&xdr)) != 0)
5014                 goto out;
5015         decode_getfattr(&xdr, res->dir_fattr, res->server,
5016                         !RPC_IS_ASYNC(rqstp->rq_task));
5017 out:
5018         return status;
5019 }
5020
5021 /*
5022  * Decode SYMLINK response
5023  */
5024 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
5025 {
5026         return nfs4_xdr_dec_create(rqstp, p, res);
5027 }
5028
5029 /*
5030  * Decode GETATTR response
5031  */
5032 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *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_sequence(&xdr, &res->seq_res, rqstp);
5043         if (status)
5044                 goto out;
5045         status = decode_putfh(&xdr);
5046         if (status)
5047                 goto out;
5048         status = decode_getfattr(&xdr, res->fattr, res->server,
5049                         !RPC_IS_ASYNC(rqstp->rq_task));
5050 out:
5051         return status;
5052 }
5053
5054 /*
5055  * Encode an SETACL request
5056  */
5057 static int
5058 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5059 {
5060         struct xdr_stream xdr;
5061         struct compound_hdr hdr = {
5062                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5063         };
5064         int status;
5065
5066         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5067         encode_compound_hdr(&xdr, req, &hdr);
5068         encode_sequence(&xdr, &args->seq_args, &hdr);
5069         encode_putfh(&xdr, args->fh, &hdr);
5070         status = encode_setacl(&xdr, args, &hdr);
5071         encode_nops(&hdr);
5072         return status;
5073 }
5074
5075 /*
5076  * Decode SETACL response
5077  */
5078 static int
5079 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
5080                     struct nfs_setaclres *res)
5081 {
5082         struct xdr_stream xdr;
5083         struct compound_hdr hdr;
5084         int status;
5085
5086         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5087         status = decode_compound_hdr(&xdr, &hdr);
5088         if (status)
5089                 goto out;
5090         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5091         if (status)
5092                 goto out;
5093         status = decode_putfh(&xdr);
5094         if (status)
5095                 goto out;
5096         status = decode_setattr(&xdr);
5097 out:
5098         return status;
5099 }
5100
5101 /*
5102  * Decode GETACL response
5103  */
5104 static int
5105 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5106                     struct nfs_getaclres *res)
5107 {
5108         struct xdr_stream xdr;
5109         struct compound_hdr hdr;
5110         int status;
5111
5112         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5113         status = decode_compound_hdr(&xdr, &hdr);
5114         if (status)
5115                 goto out;
5116         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5117         if (status)
5118                 goto out;
5119         status = decode_putfh(&xdr);
5120         if (status)
5121                 goto out;
5122         status = decode_getacl(&xdr, rqstp, &res->acl_len);
5123
5124 out:
5125         return status;
5126 }
5127
5128 /*
5129  * Decode CLOSE response
5130  */
5131 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5132 {
5133         struct xdr_stream xdr;
5134         struct compound_hdr hdr;
5135         int status;
5136
5137         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5138         status = decode_compound_hdr(&xdr, &hdr);
5139         if (status)
5140                 goto out;
5141         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5142         if (status)
5143                 goto out;
5144         status = decode_putfh(&xdr);
5145         if (status)
5146                 goto out;
5147         status = decode_close(&xdr, res);
5148         if (status != 0)
5149                 goto out;
5150         /*
5151          * Note: Server may do delete on close for this file
5152          *      in which case the getattr call will fail with
5153          *      an ESTALE error. Shouldn't be a problem,
5154          *      though, since fattr->valid will remain unset.
5155          */
5156         decode_getfattr(&xdr, res->fattr, res->server,
5157                         !RPC_IS_ASYNC(rqstp->rq_task));
5158 out:
5159         return status;
5160 }
5161
5162 /*
5163  * Decode OPEN response
5164  */
5165 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5166 {
5167         struct xdr_stream xdr;
5168         struct compound_hdr hdr;
5169         int status;
5170
5171         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5172         status = decode_compound_hdr(&xdr, &hdr);
5173         if (status)
5174                 goto out;
5175         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5176         if (status)
5177                 goto out;
5178         status = decode_putfh(&xdr);
5179         if (status)
5180                 goto out;
5181         status = decode_savefh(&xdr);
5182         if (status)
5183                 goto out;
5184         status = decode_open(&xdr, res);
5185         if (status)
5186                 goto out;
5187         if (decode_getfh(&xdr, &res->fh) != 0)
5188                 goto out;
5189         if (decode_getfattr(&xdr, res->f_attr, res->server,
5190                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5191                 goto out;
5192         if (decode_restorefh(&xdr) != 0)
5193                 goto out;
5194         decode_getfattr(&xdr, res->dir_attr, res->server,
5195                         !RPC_IS_ASYNC(rqstp->rq_task));
5196 out:
5197         return status;
5198 }
5199
5200 /*
5201  * Decode OPEN_CONFIRM response
5202  */
5203 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5204 {
5205         struct xdr_stream xdr;
5206         struct compound_hdr hdr;
5207         int status;
5208
5209         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5210         status = decode_compound_hdr(&xdr, &hdr);
5211         if (status)
5212                 goto out;
5213         status = decode_putfh(&xdr);
5214         if (status)
5215                 goto out;
5216         status = decode_open_confirm(&xdr, res);
5217 out:
5218         return status;
5219 }
5220
5221 /*
5222  * Decode OPEN response
5223  */
5224 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5225 {
5226         struct xdr_stream xdr;
5227         struct compound_hdr hdr;
5228         int status;
5229
5230         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5231         status = decode_compound_hdr(&xdr, &hdr);
5232         if (status)
5233                 goto out;
5234         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5235         if (status)
5236                 goto out;
5237         status = decode_putfh(&xdr);
5238         if (status)
5239                 goto out;
5240         status = decode_open(&xdr, res);
5241         if (status)
5242                 goto out;
5243         decode_getfattr(&xdr, res->f_attr, res->server,
5244                         !RPC_IS_ASYNC(rqstp->rq_task));
5245 out:
5246         return status;
5247 }
5248
5249 /*
5250  * Decode SETATTR response
5251  */
5252 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5253 {
5254         struct xdr_stream xdr;
5255         struct compound_hdr hdr;
5256         int status;
5257
5258         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5259         status = decode_compound_hdr(&xdr, &hdr);
5260         if (status)
5261                 goto out;
5262         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5263         if (status)
5264                 goto out;
5265         status = decode_putfh(&xdr);
5266         if (status)
5267                 goto out;
5268         status = decode_setattr(&xdr);
5269         if (status)
5270                 goto out;
5271         decode_getfattr(&xdr, res->fattr, res->server,
5272                         !RPC_IS_ASYNC(rqstp->rq_task));
5273 out:
5274         return status;
5275 }
5276
5277 /*
5278  * Decode LOCK response
5279  */
5280 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5281 {
5282         struct xdr_stream xdr;
5283         struct compound_hdr hdr;
5284         int status;
5285
5286         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5287         status = decode_compound_hdr(&xdr, &hdr);
5288         if (status)
5289                 goto out;
5290         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5291         if (status)
5292                 goto out;
5293         status = decode_putfh(&xdr);
5294         if (status)
5295                 goto out;
5296         status = decode_lock(&xdr, res);
5297 out:
5298         return status;
5299 }
5300
5301 /*
5302  * Decode LOCKT response
5303  */
5304 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5305 {
5306         struct xdr_stream xdr;
5307         struct compound_hdr hdr;
5308         int status;
5309
5310         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5311         status = decode_compound_hdr(&xdr, &hdr);
5312         if (status)
5313                 goto out;
5314         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5315         if (status)
5316                 goto out;
5317         status = decode_putfh(&xdr);
5318         if (status)
5319                 goto out;
5320         status = decode_lockt(&xdr, res);
5321 out:
5322         return status;
5323 }
5324
5325 /*
5326  * Decode LOCKU response
5327  */
5328 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5329 {
5330         struct xdr_stream xdr;
5331         struct compound_hdr hdr;
5332         int status;
5333
5334         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5335         status = decode_compound_hdr(&xdr, &hdr);
5336         if (status)
5337                 goto out;
5338         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5339         if (status)
5340                 goto out;
5341         status = decode_putfh(&xdr);
5342         if (status)
5343                 goto out;
5344         status = decode_locku(&xdr, res);
5345 out:
5346         return status;
5347 }
5348
5349 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5350 {
5351         struct xdr_stream xdr;
5352         struct compound_hdr hdr;
5353         int status;
5354
5355         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5356         status = decode_compound_hdr(&xdr, &hdr);
5357         if (!status)
5358                 status = decode_release_lockowner(&xdr);
5359         return status;
5360 }
5361
5362 /*
5363  * Decode READLINK response
5364  */
5365 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5366                                  struct nfs4_readlink_res *res)
5367 {
5368         struct xdr_stream xdr;
5369         struct compound_hdr hdr;
5370         int status;
5371
5372         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5373         status = decode_compound_hdr(&xdr, &hdr);
5374         if (status)
5375                 goto out;
5376         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5377         if (status)
5378                 goto out;
5379         status = decode_putfh(&xdr);
5380         if (status)
5381                 goto out;
5382         status = decode_readlink(&xdr, rqstp);
5383 out:
5384         return status;
5385 }
5386
5387 /*
5388  * Decode READDIR response
5389  */
5390 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5391 {
5392         struct xdr_stream xdr;
5393         struct compound_hdr hdr;
5394         int status;
5395
5396         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5397         status = decode_compound_hdr(&xdr, &hdr);
5398         if (status)
5399                 goto out;
5400         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5401         if (status)
5402                 goto out;
5403         status = decode_putfh(&xdr);
5404         if (status)
5405                 goto out;
5406         status = decode_readdir(&xdr, rqstp, res);
5407 out:
5408         return status;
5409 }
5410
5411 /*
5412  * Decode Read response
5413  */
5414 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5415 {
5416         struct xdr_stream xdr;
5417         struct compound_hdr hdr;
5418         int status;
5419
5420         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5421         status = decode_compound_hdr(&xdr, &hdr);
5422         if (status)
5423                 goto out;
5424         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5425         if (status)
5426                 goto out;
5427         status = decode_putfh(&xdr);
5428         if (status)
5429                 goto out;
5430         status = decode_read(&xdr, rqstp, res);
5431         if (!status)
5432                 status = res->count;
5433 out:
5434         return status;
5435 }
5436
5437 /*
5438  * Decode WRITE response
5439  */
5440 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5441 {
5442         struct xdr_stream xdr;
5443         struct compound_hdr hdr;
5444         int status;
5445
5446         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5447         status = decode_compound_hdr(&xdr, &hdr);
5448         if (status)
5449                 goto out;
5450         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5451         if (status)
5452                 goto out;
5453         status = decode_putfh(&xdr);
5454         if (status)
5455                 goto out;
5456         status = decode_write(&xdr, res);
5457         if (status)
5458                 goto out;
5459         decode_getfattr(&xdr, res->fattr, res->server,
5460                         !RPC_IS_ASYNC(rqstp->rq_task));
5461         if (!status)
5462                 status = res->count;
5463 out:
5464         return status;
5465 }
5466
5467 /*
5468  * Decode COMMIT response
5469  */
5470 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5471 {
5472         struct xdr_stream xdr;
5473         struct compound_hdr hdr;
5474         int status;
5475
5476         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5477         status = decode_compound_hdr(&xdr, &hdr);
5478         if (status)
5479                 goto out;
5480         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5481         if (status)
5482                 goto out;
5483         status = decode_putfh(&xdr);
5484         if (status)
5485                 goto out;
5486         status = decode_commit(&xdr, res);
5487         if (status)
5488                 goto out;
5489         decode_getfattr(&xdr, res->fattr, res->server,
5490                         !RPC_IS_ASYNC(rqstp->rq_task));
5491 out:
5492         return status;
5493 }
5494
5495 /*
5496  * Decode FSINFO response
5497  */
5498 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5499                                struct nfs4_fsinfo_res *res)
5500 {
5501         struct xdr_stream xdr;
5502         struct compound_hdr hdr;
5503         int status;
5504
5505         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5506         status = decode_compound_hdr(&xdr, &hdr);
5507         if (!status)
5508                 status = decode_sequence(&xdr, &res->seq_res, req);
5509         if (!status)
5510                 status = decode_putfh(&xdr);
5511         if (!status)
5512                 status = decode_fsinfo(&xdr, res->fsinfo);
5513         return status;
5514 }
5515
5516 /*
5517  * Decode PATHCONF response
5518  */
5519 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5520                                  struct nfs4_pathconf_res *res)
5521 {
5522         struct xdr_stream xdr;
5523         struct compound_hdr hdr;
5524         int status;
5525
5526         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5527         status = decode_compound_hdr(&xdr, &hdr);
5528         if (!status)
5529                 status = decode_sequence(&xdr, &res->seq_res, req);
5530         if (!status)
5531                 status = decode_putfh(&xdr);
5532         if (!status)
5533                 status = decode_pathconf(&xdr, res->pathconf);
5534         return status;
5535 }
5536
5537 /*
5538  * Decode STATFS response
5539  */
5540 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5541                                struct nfs4_statfs_res *res)
5542 {
5543         struct xdr_stream xdr;
5544         struct compound_hdr hdr;
5545         int status;
5546
5547         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5548         status = decode_compound_hdr(&xdr, &hdr);
5549         if (!status)
5550                 status = decode_sequence(&xdr, &res->seq_res, req);
5551         if (!status)
5552                 status = decode_putfh(&xdr);
5553         if (!status)
5554                 status = decode_statfs(&xdr, res->fsstat);
5555         return status;
5556 }
5557
5558 /*
5559  * Decode GETATTR_BITMAP response
5560  */
5561 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5562 {
5563         struct xdr_stream xdr;
5564         struct compound_hdr hdr;
5565         int status;
5566
5567         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5568         status = decode_compound_hdr(&xdr, &hdr);
5569         if (status)
5570                 goto out;
5571         status = decode_sequence(&xdr, &res->seq_res, req);
5572         if (status)
5573                 goto out;
5574         if ((status = decode_putfh(&xdr)) != 0)
5575                 goto out;
5576         status = decode_server_caps(&xdr, res);
5577 out:
5578         return status;
5579 }
5580
5581 /*
5582  * Decode RENEW response
5583  */
5584 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5585 {
5586         struct xdr_stream xdr;
5587         struct compound_hdr hdr;
5588         int status;
5589
5590         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5591         status = decode_compound_hdr(&xdr, &hdr);
5592         if (!status)
5593                 status = decode_renew(&xdr);
5594         return status;
5595 }
5596
5597 /*
5598  * Decode SETCLIENTID response
5599  */
5600 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5601                 struct nfs4_setclientid_res *res)
5602 {
5603         struct xdr_stream xdr;
5604         struct compound_hdr hdr;
5605         int status;
5606
5607         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5608         status = decode_compound_hdr(&xdr, &hdr);
5609         if (!status)
5610                 status = decode_setclientid(&xdr, res);
5611         return status;
5612 }
5613
5614 /*
5615  * Decode SETCLIENTID_CONFIRM response
5616  */
5617 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5618 {
5619         struct xdr_stream xdr;
5620         struct compound_hdr hdr;
5621         int status;
5622
5623         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5624         status = decode_compound_hdr(&xdr, &hdr);
5625         if (!status)
5626                 status = decode_setclientid_confirm(&xdr);
5627         if (!status)
5628                 status = decode_putrootfh(&xdr);
5629         if (!status)
5630                 status = decode_fsinfo(&xdr, fsinfo);
5631         return status;
5632 }
5633
5634 /*
5635  * Decode DELEGRETURN response
5636  */
5637 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5638 {
5639         struct xdr_stream xdr;
5640         struct compound_hdr hdr;
5641         int status;
5642
5643         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5644         status = decode_compound_hdr(&xdr, &hdr);
5645         if (status)
5646                 goto out;
5647         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5648         if (status)
5649                 goto out;
5650         status = decode_putfh(&xdr);
5651         if (status != 0)
5652                 goto out;
5653         status = decode_delegreturn(&xdr);
5654         if (status != 0)
5655                 goto out;
5656         decode_getfattr(&xdr, res->fattr, res->server,
5657                         !RPC_IS_ASYNC(rqstp->rq_task));
5658 out:
5659         return status;
5660 }
5661
5662 /*
5663  * Decode FS_LOCATIONS response
5664  */
5665 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5666                                      struct nfs4_fs_locations_res *res)
5667 {
5668         struct xdr_stream xdr;
5669         struct compound_hdr hdr;
5670         int status;
5671
5672         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5673         status = decode_compound_hdr(&xdr, &hdr);
5674         if (status)
5675                 goto out;
5676         status = decode_sequence(&xdr, &res->seq_res, req);
5677         if (status)
5678                 goto out;
5679         if ((status = decode_putfh(&xdr)) != 0)
5680                 goto out;
5681         if ((status = decode_lookup(&xdr)) != 0)
5682                 goto out;
5683         xdr_enter_page(&xdr, PAGE_SIZE);
5684         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5685                                  res->fs_locations->server,
5686                                  !RPC_IS_ASYNC(req->rq_task));
5687 out:
5688         return status;
5689 }
5690
5691 #if defined(CONFIG_NFS_V4_1)
5692 /*
5693  * Decode EXCHANGE_ID response
5694  */
5695 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5696                                     void *res)
5697 {
5698         struct xdr_stream xdr;
5699         struct compound_hdr hdr;
5700         int status;
5701
5702         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5703         status = decode_compound_hdr(&xdr, &hdr);
5704         if (!status)
5705                 status = decode_exchange_id(&xdr, res);
5706         return status;
5707 }
5708
5709 /*
5710  * Decode CREATE_SESSION response
5711  */
5712 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5713                                        struct nfs41_create_session_res *res)
5714 {
5715         struct xdr_stream xdr;
5716         struct compound_hdr hdr;
5717         int status;
5718
5719         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5720         status = decode_compound_hdr(&xdr, &hdr);
5721         if (!status)
5722                 status = decode_create_session(&xdr, res);
5723         return status;
5724 }
5725
5726 /*
5727  * Decode DESTROY_SESSION response
5728  */
5729 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5730                                         void *dummy)
5731 {
5732         struct xdr_stream xdr;
5733         struct compound_hdr hdr;
5734         int status;
5735
5736         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5737         status = decode_compound_hdr(&xdr, &hdr);
5738         if (!status)
5739                 status = decode_destroy_session(&xdr, dummy);
5740         return status;
5741 }
5742
5743 /*
5744  * Decode SEQUENCE response
5745  */
5746 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5747                                  struct nfs4_sequence_res *res)
5748 {
5749         struct xdr_stream xdr;
5750         struct compound_hdr hdr;
5751         int status;
5752
5753         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5754         status = decode_compound_hdr(&xdr, &hdr);
5755         if (!status)
5756                 status = decode_sequence(&xdr, res, rqstp);
5757         return status;
5758 }
5759
5760 /*
5761  * Decode GET_LEASE_TIME response
5762  */
5763 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5764                                        struct nfs4_get_lease_time_res *res)
5765 {
5766         struct xdr_stream xdr;
5767         struct compound_hdr hdr;
5768         int status;
5769
5770         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5771         status = decode_compound_hdr(&xdr, &hdr);
5772         if (!status)
5773                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5774         if (!status)
5775                 status = decode_putrootfh(&xdr);
5776         if (!status)
5777                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5778         return status;
5779 }
5780
5781 /*
5782  * Decode RECLAIM_COMPLETE response
5783  */
5784 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5785                                          struct nfs41_reclaim_complete_res *res)
5786 {
5787         struct xdr_stream xdr;
5788         struct compound_hdr hdr;
5789         int status;
5790
5791         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5792         status = decode_compound_hdr(&xdr, &hdr);
5793         if (!status)
5794                 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5795         if (!status)
5796                 status = decode_reclaim_complete(&xdr, (void *)NULL);
5797         return status;
5798 }
5799 #endif /* CONFIG_NFS_V4_1 */
5800
5801 __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
5802                            struct nfs_server *server, int plus)
5803 {
5804         uint32_t bitmap[2] = {0};
5805         uint32_t len;
5806         __be32 *p = xdr_inline_decode(xdr, 4);
5807         if (unlikely(!p))
5808                 goto out_overflow;
5809         if (!ntohl(*p++)) {
5810                 p = xdr_inline_decode(xdr, 4);
5811                 if (unlikely(!p))
5812                         goto out_overflow;
5813                 if (!ntohl(*p++))
5814                         return ERR_PTR(-EAGAIN);
5815                 entry->eof = 1;
5816                 return ERR_PTR(-EBADCOOKIE);
5817         }
5818
5819         p = xdr_inline_decode(xdr, 12);
5820         if (unlikely(!p))
5821                 goto out_overflow;
5822         entry->prev_cookie = entry->cookie;
5823         p = xdr_decode_hyper(p, &entry->cookie);
5824         entry->len = ntohl(*p++);
5825
5826         p = xdr_inline_decode(xdr, entry->len);
5827         if (unlikely(!p))
5828                 goto out_overflow;
5829         entry->name = (const char *) p;
5830
5831         /*
5832          * In case the server doesn't return an inode number,
5833          * we fake one here.  (We don't use inode number 0,
5834          * since glibc seems to choke on it...)
5835          */
5836         entry->ino = 1;
5837         entry->fattr->valid = 0;
5838
5839         if (decode_attr_bitmap(xdr, bitmap) < 0)
5840                 goto out_overflow;
5841
5842         if (decode_attr_length(xdr, &len, &p) < 0)
5843                 goto out_overflow;
5844
5845         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
5846                 goto out_overflow;
5847         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
5848                 entry->ino = entry->fattr->fileid;
5849
5850         if (verify_attr_len(xdr, p, len) < 0)
5851                 goto out_overflow;
5852
5853         p = xdr_inline_peek(xdr, 8);
5854         if (p != NULL)
5855                 entry->eof = !p[0] && p[1];
5856         else
5857                 entry->eof = 0;
5858
5859         return p;
5860
5861 out_overflow:
5862         print_overflow_msg(__func__, xdr);
5863         return ERR_PTR(-EIO);
5864 }
5865
5866 /*
5867  * We need to translate between nfs status return values and
5868  * the local errno values which may not be the same.
5869  */
5870 static struct {
5871         int stat;
5872         int errno;
5873 } nfs_errtbl[] = {
5874         { NFS4_OK,              0               },
5875         { NFS4ERR_PERM,         -EPERM          },
5876         { NFS4ERR_NOENT,        -ENOENT         },
5877         { NFS4ERR_IO,           -errno_NFSERR_IO},
5878         { NFS4ERR_NXIO,         -ENXIO          },
5879         { NFS4ERR_ACCESS,       -EACCES         },
5880         { NFS4ERR_EXIST,        -EEXIST         },
5881         { NFS4ERR_XDEV,         -EXDEV          },
5882         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5883         { NFS4ERR_ISDIR,        -EISDIR         },
5884         { NFS4ERR_INVAL,        -EINVAL         },
5885         { NFS4ERR_FBIG,         -EFBIG          },
5886         { NFS4ERR_NOSPC,        -ENOSPC         },
5887         { NFS4ERR_ROFS,         -EROFS          },
5888         { NFS4ERR_MLINK,        -EMLINK         },
5889         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5890         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5891         { NFS4ERR_DQUOT,        -EDQUOT         },
5892         { NFS4ERR_STALE,        -ESTALE         },
5893         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5894         { NFS4ERR_BADOWNER,     -EINVAL         },
5895         { NFS4ERR_BADNAME,      -EINVAL         },
5896         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5897         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5898         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5899         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
5900         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5901         { NFS4ERR_LOCKED,       -EAGAIN         },
5902         { NFS4ERR_SYMLINK,      -ELOOP          },
5903         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5904         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5905         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5906                                                     * to be handled by a
5907                                                     * middle-layer.
5908                                                     */
5909         { -1,                   -EIO            }
5910 };
5911
5912 /*
5913  * Convert an NFS error code to a local one.
5914  * This one is used jointly by NFSv2 and NFSv3.
5915  */
5916 static int
5917 nfs4_stat_to_errno(int stat)
5918 {
5919         int i;
5920         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5921                 if (nfs_errtbl[i].stat == stat)
5922                         return nfs_errtbl[i].errno;
5923         }
5924         if (stat <= 10000 || stat > 10100) {
5925                 /* The server is looney tunes. */
5926                 return -EREMOTEIO;
5927         }
5928         /* If we cannot translate the error, the recovery routines should
5929          * handle it.
5930          * Note: remaining NFSv4 error codes have values > 10000, so should
5931          * not conflict with native Linux error codes.
5932          */
5933         return -stat;
5934 }
5935
5936 #define PROC(proc, argtype, restype)                            \
5937 [NFSPROC4_CLNT_##proc] = {                                      \
5938         .p_proc   = NFSPROC4_COMPOUND,                          \
5939         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5940         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5941         .p_arglen = NFS4_##argtype##_sz,                        \
5942         .p_replen = NFS4_##restype##_sz,                        \
5943         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5944         .p_name   = #proc,                                      \
5945 }
5946
5947 struct rpc_procinfo     nfs4_procedures[] = {
5948   PROC(READ,            enc_read,       dec_read),
5949   PROC(WRITE,           enc_write,      dec_write),
5950   PROC(COMMIT,          enc_commit,     dec_commit),
5951   PROC(OPEN,            enc_open,       dec_open),
5952   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5953   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5954   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5955   PROC(CLOSE,           enc_close,      dec_close),
5956   PROC(SETATTR,         enc_setattr,    dec_setattr),
5957   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5958   PROC(RENEW,           enc_renew,      dec_renew),
5959   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5960   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5961   PROC(LOCK,            enc_lock,       dec_lock),
5962   PROC(LOCKT,           enc_lockt,      dec_lockt),
5963   PROC(LOCKU,           enc_locku,      dec_locku),
5964   PROC(ACCESS,          enc_access,     dec_access),
5965   PROC(GETATTR,         enc_getattr,    dec_getattr),
5966   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5967   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5968   PROC(REMOVE,          enc_remove,     dec_remove),
5969   PROC(RENAME,          enc_rename,     dec_rename),
5970   PROC(LINK,            enc_link,       dec_link),
5971   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5972   PROC(CREATE,          enc_create,     dec_create),
5973   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5974   PROC(STATFS,          enc_statfs,     dec_statfs),
5975   PROC(READLINK,        enc_readlink,   dec_readlink),
5976   PROC(READDIR,         enc_readdir,    dec_readdir),
5977   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5978   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5979   PROC(GETACL,          enc_getacl,     dec_getacl),
5980   PROC(SETACL,          enc_setacl,     dec_setacl),
5981   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5982   PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
5983 #if defined(CONFIG_NFS_V4_1)
5984   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5985   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5986   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5987   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5988   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5989   PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
5990 #endif /* CONFIG_NFS_V4_1 */
5991 };
5992
5993 struct rpc_version              nfs_version4 = {
5994         .number                 = 4,
5995         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5996         .procs                  = nfs4_procedures
5997 };
5998
5999 /*
6000  * Local variables:
6001  *  c-basic-offset: 8
6002  * End:
6003  */