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   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/errno.h>
  43 #include <linux/string.h>
  44 #include <linux/in.h>
  45 #include <linux/pagemap.h>
  46 #include <linux/proc_fs.h>
  47 #include <linux/kdev_t.h>
  48 #include <linux/sunrpc/clnt.h>
  49 #include <linux/sunrpc/msg_prot.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55 #include "internal.h"
  56
  57 #define NFSDBG_FACILITY         NFSDBG_XDR
  58
  59 /* Mapping from NFS error code to "errno" error code. */
  60 #define errno_NFSERR_IO         EIO
  61
  62 static int nfs4_stat_to_errno(int);
  63
  64 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  65 #ifdef DEBUG
  66 #define NFS4_MAXTAGLEN          20
  67 #else
  68 #define NFS4_MAXTAGLEN          0
  69 #endif
  70
  71 /* lock,open owner id:
  72  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  73  */
  74 #define open_owner_id_maxsz     (1 + 4)
  75 #define lock_owner_id_maxsz     (1 + 4)
  76 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  77 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define op_encode_hdr_maxsz     (1)
  80 #define op_decode_hdr_maxsz     (2)
  81 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  86                                 (NFS4_FHSIZE >> 2))
  87 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  88 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  89 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  90 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  91 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  92                                 ((3+NFS4_FHSIZE) >> 2))
  93 #define nfs4_fattr_bitmap_maxsz 3
  94 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  95 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  96 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  97 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 /* This is based on getfattr, which uses the most attributes: */
 100 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 101                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 102 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 103                                 nfs4_fattr_value_maxsz)
 104 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 105 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 106                                  1 + 2 + 1 + \
 107                                 nfs4_owner_maxsz + \
 108                                 nfs4_group_maxsz + \
 109                                 4 + 4)
 110 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 111 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 112 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 113 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 114 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 115 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 116 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 117 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 118 #define encode_setclientid_maxsz \
 119                                 (op_encode_hdr_maxsz + \
 120                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 121                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 122                                 1 /* sc_prog */ + \
 123                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 124                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 125                                 1) /* sc_cb_ident */
 126 #define decode_setclientid_maxsz \
 127                                 (op_decode_hdr_maxsz + \
 128                                 2 + \
 129                                 1024) /* large value for CLID_INUSE */
 130 #define encode_setclientid_confirm_maxsz \
 131                                 (op_encode_hdr_maxsz + \
 132                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 133 #define decode_setclientid_confirm_maxsz \
 134                                 (op_decode_hdr_maxsz)
 135 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 136 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 137 #define encode_share_access_maxsz \
 138                                 (2)
 139 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 140 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 141 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 142 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 143                                 2 + encode_share_access_maxsz + 2 + \
 144                                 open_owner_id_maxsz + \
 145                                 encode_opentype_maxsz + \
 146                                 encode_claim_null_maxsz)
 147 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 148 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 149                                 decode_ace_maxsz)
 150 #define decode_change_info_maxsz        (5)
 151 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 152                                 decode_stateid_maxsz + \
 153                                 decode_change_info_maxsz + 1 + \
 154                                 nfs4_fattr_bitmap_maxsz + \
 155                                 decode_delegation_maxsz)
 156 #define encode_open_confirm_maxsz \
 157                                 (op_encode_hdr_maxsz + \
 158                                  encode_stateid_maxsz + 1)
 159 #define decode_open_confirm_maxsz \
 160                                 (op_decode_hdr_maxsz + \
 161                                  decode_stateid_maxsz)
 162 #define encode_open_downgrade_maxsz \
 163                                 (op_encode_hdr_maxsz + \
 164                                  encode_stateid_maxsz + 1 + \
 165                                  encode_share_access_maxsz)
 166 #define decode_open_downgrade_maxsz \
 167                                 (op_decode_hdr_maxsz + \
 168                                  decode_stateid_maxsz)
 169 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 170                                  1 + encode_stateid_maxsz)
 171 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 172                                  decode_stateid_maxsz)
 173 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 174                                  encode_stateid_maxsz + \
 175                                  encode_attrs_maxsz)
 176 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 177                                  nfs4_fattr_bitmap_maxsz)
 178 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + 3)
 180 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 181 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 182                                  2 + encode_verifier_maxsz + 5)
 183 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 184                                  decode_verifier_maxsz)
 185 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 186 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 187 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 188                                  encode_stateid_maxsz + 4)
 189 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 190                                  2 + decode_verifier_maxsz)
 191 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 192 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 193                                  decode_verifier_maxsz)
 194 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 195                                 nfs4_name_maxsz)
 196 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 197                                  decode_change_info_maxsz)
 198 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 199                                 2 * nfs4_name_maxsz)
 200 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 201                                  decode_change_info_maxsz + \
 202                                  decode_change_info_maxsz)
 203 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 204                                 nfs4_name_maxsz)
 205 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 206 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 207                                  7 + \
 208                                  1 + encode_stateid_maxsz + 8)
 209 #define decode_lock_denied_maxsz \
 210                                 (8 + decode_lockowner_maxsz)
 211 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 212                                  decode_lock_denied_maxsz)
 213 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 214 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 215                                  decode_lock_denied_maxsz)
 216 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 217                                  encode_stateid_maxsz + \
 218                                  4)
 219 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 220                                  decode_stateid_maxsz)
 221 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 222 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 223 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 224                                 1 + nfs4_name_maxsz + \
 225                                 1 + \
 226                                 nfs4_fattr_maxsz)
 227 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 228 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 229                                 1 + 2 + nfs4_name_maxsz + \
 230                                 encode_attrs_maxsz)
 231 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 232                                 decode_change_info_maxsz + \
 233                                 nfs4_fattr_bitmap_maxsz)
 234 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 235 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 236 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 237 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 238 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 239 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 240                                  nfs4_fattr_bitmap_maxsz + 1)
 241 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 242                                  encode_stateid_maxsz + 3)
 243 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 244 #define encode_fs_locations_maxsz \
 245                                 (encode_getattr_maxsz)
 246 #define decode_fs_locations_maxsz \
 247                                 (0)
 248
 249 #if defined(CONFIG_NFS_V4_1)
 250 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 251
 252 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 253                                 encode_verifier_maxsz + \
 254                                 1 /* co_ownerid.len */ + \
 255                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 256                                 1 /* flags */ + \
 257                                 1 /* spa_how */ + \
 258                                 0 /* SP4_NONE (for now) */ + \
 259                                 1 /* zero implemetation id array */)
 260 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 261                                 2 /* eir_clientid */ + \
 262                                 1 /* eir_sequenceid */ + \
 263                                 1 /* eir_flags */ + \
 264                                 1 /* spr_how */ + \
 265                                 0 /* SP4_NONE (for now) */ + \
 266                                 2 /* eir_server_owner.so_minor_id */ + \
 267                                 /* eir_server_owner.so_major_id<> */ \
 268                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 269                                 /* eir_server_scope<> */ \
 270                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 271                                 1 /* eir_server_impl_id array length */ + \
 272                                 0 /* ignored eir_server_impl_id contents */)
 273 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 274 #define decode_channel_attrs_maxsz  (6 + \
 275                                      1 /* ca_rdma_ird.len */ + \
 276                                      1 /* ca_rdma_ird */)
 277 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 278                                      2 /* csa_clientid */ + \
 279                                      1 /* csa_sequence */ + \
 280                                      1 /* csa_flags */ + \
 281                                      encode_channel_attrs_maxsz + \
 282                                      encode_channel_attrs_maxsz + \
 283                                      1 /* csa_cb_program */ + \
 284                                      1 /* csa_sec_parms.len (1) */ + \
 285                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 286                                      1 /* stamp */ + \
 287                                      1 /* machinename.len */ + \
 288                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 289                                      1 /* uid */ + \
 290                                      1 /* gid */ + \
 291                                      1 /* gids.len (0) */)
 292 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 293                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 294                                      1 /* csr_sequence */ + \
 295                                      1 /* csr_flags */ + \
 296                                      decode_channel_attrs_maxsz + \
 297                                      decode_channel_attrs_maxsz)
 298 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 299 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 300 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 301                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 302 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 303                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 304 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 305 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 306 #else /* CONFIG_NFS_V4_1 */
 307 #define encode_sequence_maxsz   0
 308 #define decode_sequence_maxsz   0
 309 #endif /* CONFIG_NFS_V4_1 */
 310
 311 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 312 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 313 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 314                                 encode_sequence_maxsz + \
 315                                 encode_putfh_maxsz + \
 316                                 encode_read_maxsz)
 317 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 318                                 decode_sequence_maxsz + \
 319                                 decode_putfh_maxsz + \
 320                                 decode_read_maxsz)
 321 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 322                                 encode_sequence_maxsz + \
 323                                 encode_putfh_maxsz + \
 324                                 encode_readlink_maxsz)
 325 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 326                                 decode_sequence_maxsz + \
 327                                 decode_putfh_maxsz + \
 328                                 decode_readlink_maxsz)
 329 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 330                                 encode_sequence_maxsz + \
 331                                 encode_putfh_maxsz + \
 332                                 encode_readdir_maxsz)
 333 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 334                                 decode_sequence_maxsz + \
 335                                 decode_putfh_maxsz + \
 336                                 decode_readdir_maxsz)
 337 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 338                                 encode_sequence_maxsz + \
 339                                 encode_putfh_maxsz + \
 340                                 encode_write_maxsz + \
 341                                 encode_getattr_maxsz)
 342 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 343                                 decode_sequence_maxsz + \
 344                                 decode_putfh_maxsz + \
 345                                 decode_write_maxsz + \
 346                                 decode_getattr_maxsz)
 347 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 348                                 encode_sequence_maxsz + \
 349                                 encode_putfh_maxsz + \
 350                                 encode_commit_maxsz + \
 351                                 encode_getattr_maxsz)
 352 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 353                                 decode_sequence_maxsz + \
 354                                 decode_putfh_maxsz + \
 355                                 decode_commit_maxsz + \
 356                                 decode_getattr_maxsz)
 357 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 358                                 encode_sequence_maxsz + \
 359                                 encode_putfh_maxsz + \
 360                                 encode_savefh_maxsz + \
 361                                 encode_open_maxsz + \
 362                                 encode_getfh_maxsz + \
 363                                 encode_getattr_maxsz + \
 364                                 encode_restorefh_maxsz + \
 365                                 encode_getattr_maxsz)
 366 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 367                                 decode_sequence_maxsz + \
 368                                 decode_putfh_maxsz + \
 369                                 decode_savefh_maxsz + \
 370                                 decode_open_maxsz + \
 371                                 decode_getfh_maxsz + \
 372                                 decode_getattr_maxsz + \
 373                                 decode_restorefh_maxsz + \
 374                                 decode_getattr_maxsz)
 375 #define NFS4_enc_open_confirm_sz \
 376                                 (compound_encode_hdr_maxsz + \
 377                                  encode_putfh_maxsz + \
 378                                  encode_open_confirm_maxsz)
 379 #define NFS4_dec_open_confirm_sz \
 380                                 (compound_decode_hdr_maxsz + \
 381                                  decode_putfh_maxsz + \
 382                                  decode_open_confirm_maxsz)
 383 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 384                                         encode_sequence_maxsz + \
 385                                         encode_putfh_maxsz + \
 386                                         encode_open_maxsz + \
 387                                         encode_getattr_maxsz)
 388 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 389                                         decode_sequence_maxsz + \
 390                                         decode_putfh_maxsz + \
 391                                         decode_open_maxsz + \
 392                                         decode_getattr_maxsz)
 393 #define NFS4_enc_open_downgrade_sz \
 394                                 (compound_encode_hdr_maxsz + \
 395                                  encode_sequence_maxsz + \
 396                                  encode_putfh_maxsz + \
 397                                  encode_open_downgrade_maxsz + \
 398                                  encode_getattr_maxsz)
 399 #define NFS4_dec_open_downgrade_sz \
 400                                 (compound_decode_hdr_maxsz + \
 401                                  decode_sequence_maxsz + \
 402                                  decode_putfh_maxsz + \
 403                                  decode_open_downgrade_maxsz + \
 404                                  decode_getattr_maxsz)
 405 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 406                                  encode_sequence_maxsz + \
 407                                  encode_putfh_maxsz + \
 408                                  encode_close_maxsz + \
 409                                  encode_getattr_maxsz)
 410 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 411                                  decode_sequence_maxsz + \
 412                                  decode_putfh_maxsz + \
 413                                  decode_close_maxsz + \
 414                                  decode_getattr_maxsz)
 415 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 416                                  encode_sequence_maxsz + \
 417                                  encode_putfh_maxsz + \
 418                                  encode_setattr_maxsz + \
 419                                  encode_getattr_maxsz)
 420 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 421                                  decode_sequence_maxsz + \
 422                                  decode_putfh_maxsz + \
 423                                  decode_setattr_maxsz + \
 424                                  decode_getattr_maxsz)
 425 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_fsinfo_maxsz)
 429 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 430                                 decode_sequence_maxsz + \
 431                                 decode_putfh_maxsz + \
 432                                 decode_fsinfo_maxsz)
 433 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 434                                 encode_renew_maxsz)
 435 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 436                                 decode_renew_maxsz)
 437 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 438                                 encode_setclientid_maxsz)
 439 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 440                                 decode_setclientid_maxsz)
 441 #define NFS4_enc_setclientid_confirm_sz \
 442                                 (compound_encode_hdr_maxsz + \
 443                                 encode_setclientid_confirm_maxsz + \
 444                                 encode_putrootfh_maxsz + \
 445                                 encode_fsinfo_maxsz)
 446 #define NFS4_dec_setclientid_confirm_sz \
 447                                 (compound_decode_hdr_maxsz + \
 448                                 decode_setclientid_confirm_maxsz + \
 449                                 decode_putrootfh_maxsz + \
 450                                 decode_fsinfo_maxsz)
 451 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_lock_maxsz)
 455 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 456                                 decode_sequence_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_lock_maxsz)
 459 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_lockt_maxsz)
 463 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 464                                  decode_sequence_maxsz + \
 465                                  decode_putfh_maxsz + \
 466                                  decode_lockt_maxsz)
 467 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 468                                 encode_sequence_maxsz + \
 469                                 encode_putfh_maxsz + \
 470                                 encode_locku_maxsz)
 471 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 472                                 decode_sequence_maxsz + \
 473                                 decode_putfh_maxsz + \
 474                                 decode_locku_maxsz)
 475 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 476                                 encode_sequence_maxsz + \
 477                                 encode_putfh_maxsz + \
 478                                 encode_access_maxsz + \
 479                                 encode_getattr_maxsz)
 480 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 481                                 decode_sequence_maxsz + \
 482                                 decode_putfh_maxsz + \
 483                                 decode_access_maxsz + \
 484                                 decode_getattr_maxsz)
 485 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 486                                 encode_sequence_maxsz + \
 487                                 encode_putfh_maxsz + \
 488                                 encode_getattr_maxsz)
 489 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 490                                 decode_sequence_maxsz + \
 491                                 decode_putfh_maxsz + \
 492                                 decode_getattr_maxsz)
 493 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 494                                 encode_sequence_maxsz + \
 495                                 encode_putfh_maxsz + \
 496                                 encode_lookup_maxsz + \
 497                                 encode_getattr_maxsz + \
 498                                 encode_getfh_maxsz)
 499 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 500                                 decode_sequence_maxsz + \
 501                                 decode_putfh_maxsz + \
 502                                 decode_lookup_maxsz + \
 503                                 decode_getattr_maxsz + \
 504                                 decode_getfh_maxsz)
 505 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 506                                 encode_sequence_maxsz + \
 507                                 encode_putrootfh_maxsz + \
 508                                 encode_getattr_maxsz + \
 509                                 encode_getfh_maxsz)
 510 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 511                                 decode_sequence_maxsz + \
 512                                 decode_putrootfh_maxsz + \
 513                                 decode_getattr_maxsz + \
 514                                 decode_getfh_maxsz)
 515 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 516                                 encode_sequence_maxsz + \
 517                                 encode_putfh_maxsz + \
 518                                 encode_remove_maxsz + \
 519                                 encode_getattr_maxsz)
 520 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 521                                 decode_sequence_maxsz + \
 522                                 decode_putfh_maxsz + \
 523                                 decode_remove_maxsz + \
 524                                 decode_getattr_maxsz)
 525 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 526                                 encode_sequence_maxsz + \
 527                                 encode_putfh_maxsz + \
 528                                 encode_savefh_maxsz + \
 529                                 encode_putfh_maxsz + \
 530                                 encode_rename_maxsz + \
 531                                 encode_getattr_maxsz + \
 532                                 encode_restorefh_maxsz + \
 533                                 encode_getattr_maxsz)
 534 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 535                                 decode_sequence_maxsz + \
 536                                 decode_putfh_maxsz + \
 537                                 decode_savefh_maxsz + \
 538                                 decode_putfh_maxsz + \
 539                                 decode_rename_maxsz + \
 540                                 decode_getattr_maxsz + \
 541                                 decode_restorefh_maxsz + \
 542                                 decode_getattr_maxsz)
 543 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 544                                 encode_sequence_maxsz + \
 545                                 encode_putfh_maxsz + \
 546                                 encode_savefh_maxsz + \
 547                                 encode_putfh_maxsz + \
 548                                 encode_link_maxsz + \
 549                                 decode_getattr_maxsz + \
 550                                 encode_restorefh_maxsz + \
 551                                 decode_getattr_maxsz)
 552 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 553                                 decode_sequence_maxsz + \
 554                                 decode_putfh_maxsz + \
 555                                 decode_savefh_maxsz + \
 556                                 decode_putfh_maxsz + \
 557                                 decode_link_maxsz + \
 558                                 decode_getattr_maxsz + \
 559                                 decode_restorefh_maxsz + \
 560                                 decode_getattr_maxsz)
 561 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 562                                 encode_sequence_maxsz + \
 563                                 encode_putfh_maxsz + \
 564                                 encode_symlink_maxsz + \
 565                                 encode_getattr_maxsz + \
 566                                 encode_getfh_maxsz)
 567 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 568                                 decode_sequence_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_symlink_maxsz + \
 571                                 decode_getattr_maxsz + \
 572                                 decode_getfh_maxsz)
 573 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 574                                 encode_sequence_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_savefh_maxsz + \
 577                                 encode_create_maxsz + \
 578                                 encode_getfh_maxsz + \
 579                                 encode_getattr_maxsz + \
 580                                 encode_restorefh_maxsz + \
 581                                 encode_getattr_maxsz)
 582 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 583                                 decode_sequence_maxsz + \
 584                                 decode_putfh_maxsz + \
 585                                 decode_savefh_maxsz + \
 586                                 decode_create_maxsz + \
 587                                 decode_getfh_maxsz + \
 588                                 decode_getattr_maxsz + \
 589                                 decode_restorefh_maxsz + \
 590                                 decode_getattr_maxsz)
 591 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 592                                 encode_sequence_maxsz + \
 593                                 encode_putfh_maxsz + \
 594                                 encode_getattr_maxsz)
 595 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_getattr_maxsz)
 599 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 600                                 encode_sequence_maxsz + \
 601                                 encode_putfh_maxsz + \
 602                                 encode_statfs_maxsz)
 603 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 604                                 decode_sequence_maxsz + \
 605                                 decode_putfh_maxsz + \
 606                                 decode_statfs_maxsz)
 607 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 608                                 encode_sequence_maxsz + \
 609                                 encode_putfh_maxsz + \
 610                                 encode_getattr_maxsz)
 611 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 612                                 decode_sequence_maxsz + \
 613                                 decode_putfh_maxsz + \
 614                                 decode_getattr_maxsz)
 615 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putfh_maxsz + \
 618                                 encode_delegreturn_maxsz + \
 619                                 encode_getattr_maxsz)
 620 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 621                                 decode_sequence_maxsz + \
 622                                 decode_delegreturn_maxsz + \
 623                                 decode_getattr_maxsz)
 624 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 625                                 encode_sequence_maxsz + \
 626                                 encode_putfh_maxsz + \
 627                                 encode_getacl_maxsz)
 628 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 629                                 decode_sequence_maxsz + \
 630                                 decode_putfh_maxsz + \
 631                                 decode_getacl_maxsz)
 632 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 633                                 encode_sequence_maxsz + \
 634                                 encode_putfh_maxsz + \
 635                                 encode_setacl_maxsz)
 636 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 637                                 decode_sequence_maxsz + \
 638                                 decode_putfh_maxsz + \
 639                                 decode_setacl_maxsz)
 640 #define NFS4_enc_fs_locations_sz \
 641                                 (compound_encode_hdr_maxsz + \
 642                                  encode_sequence_maxsz + \
 643                                  encode_putfh_maxsz + \
 644                                  encode_lookup_maxsz + \
 645                                  encode_fs_locations_maxsz)
 646 #define NFS4_dec_fs_locations_sz \
 647                                 (compound_decode_hdr_maxsz + \
 648                                  decode_sequence_maxsz + \
 649                                  decode_putfh_maxsz + \
 650                                  decode_lookup_maxsz + \
 651                                  decode_fs_locations_maxsz)
 652 #if defined(CONFIG_NFS_V4_1)
 653 #define NFS4_enc_exchange_id_sz \
 654                                 (compound_encode_hdr_maxsz + \
 655                                  encode_exchange_id_maxsz)
 656 #define NFS4_dec_exchange_id_sz \
 657                                 (compound_decode_hdr_maxsz + \
 658                                  decode_exchange_id_maxsz)
 659 #define NFS4_enc_create_session_sz \
 660                                 (compound_encode_hdr_maxsz + \
 661                                  encode_create_session_maxsz)
 662 #define NFS4_dec_create_session_sz \
 663                                 (compound_decode_hdr_maxsz + \
 664                                  decode_create_session_maxsz)
 665 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 666                                          encode_destroy_session_maxsz)
 667 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 668                                          decode_destroy_session_maxsz)
 669 #define NFS4_enc_sequence_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  encode_sequence_maxsz)
 672 #define NFS4_dec_sequence_sz \
 673                                 (compound_decode_hdr_maxsz + \
 674                                  decode_sequence_maxsz)
 675 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 676                                          encode_sequence_maxsz + \
 677                                          encode_putrootfh_maxsz + \
 678                                          encode_fsinfo_maxsz)
 679 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 680                                          decode_sequence_maxsz + \
 681                                          decode_putrootfh_maxsz + \
 682                                          decode_fsinfo_maxsz)
 683 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 684                                          encode_sequence_maxsz + \
 685                                          encode_reclaim_complete_maxsz)
 686 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 687                                          decode_sequence_maxsz + \
 688                                          decode_reclaim_complete_maxsz)
 689
 690 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 691                                       compound_encode_hdr_maxsz +
 692                                       encode_sequence_maxsz +
 693                                       encode_putfh_maxsz +
 694                                       encode_getattr_maxsz) *
 695                                      XDR_UNIT);
 696
 697 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 698                                      compound_decode_hdr_maxsz +
 699                                      decode_sequence_maxsz +
 700                                      decode_putfh_maxsz) *
 701                                     XDR_UNIT);
 702 #endif /* CONFIG_NFS_V4_1 */
 703
 704 static const umode_t nfs_type2fmt[] = {
 705         [NF4BAD] = 0,
 706         [NF4REG] = S_IFREG,
 707         [NF4DIR] = S_IFDIR,
 708         [NF4BLK] = S_IFBLK,
 709         [NF4CHR] = S_IFCHR,
 710         [NF4LNK] = S_IFLNK,
 711         [NF4SOCK] = S_IFSOCK,
 712         [NF4FIFO] = S_IFIFO,
 713         [NF4ATTRDIR] = 0,
 714         [NF4NAMEDATTR] = 0,
 715 };
 716
 717 struct compound_hdr {
 718         int32_t         status;
 719         uint32_t        nops;
 720         __be32 *        nops_p;
 721         uint32_t        taglen;
 722         char *          tag;
 723         uint32_t        replen;         /* expected reply words */
 724         u32             minorversion;
 725 };
 726
 727 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 728 {
 729         __be32 *p = xdr_reserve_space(xdr, nbytes);
 730         BUG_ON(!p);
 731         return p;
 732 }
 733
 734 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 735 {
 736         __be32 *p;
 737
 738         p = xdr_reserve_space(xdr, 4 + len);
 739         BUG_ON(p == NULL);
 740         xdr_encode_opaque(p, str, len);
 741 }
 742
 743 static void encode_compound_hdr(struct xdr_stream *xdr,
 744                                 struct rpc_rqst *req,
 745                                 struct compound_hdr *hdr)
 746 {
 747         __be32 *p;
 748         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 749
 750         /* initialize running count of expected bytes in reply.
 751          * NOTE: the replied tag SHOULD be the same is the one sent,
 752          * but this is not required as a MUST for the server to do so. */
 753         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 754
 755         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 756         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 757         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 758         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 759         *p++ = cpu_to_be32(hdr->minorversion);
 760         hdr->nops_p = p;
 761         *p = cpu_to_be32(hdr->nops);
 762 }
 763
 764 static void encode_nops(struct compound_hdr *hdr)
 765 {
 766         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 767         *hdr->nops_p = htonl(hdr->nops);
 768 }
 769
 770 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 771 {
 772         __be32 *p;
 773
 774         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 775         BUG_ON(p == NULL);
 776         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 777 }
 778
 779 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 780 {
 781         char owner_name[IDMAP_NAMESZ];
 782         char owner_group[IDMAP_NAMESZ];
 783         int owner_namelen = 0;
 784         int owner_grouplen = 0;
 785         __be32 *p;
 786         __be32 *q;
 787         int len;
 788         uint32_t bmval0 = 0;
 789         uint32_t bmval1 = 0;
 790
 791         /*
 792          * We reserve enough space to write the entire attribute buffer at once.
 793          * In the worst-case, this would be
 794          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 795          *          = 36 bytes, plus any contribution from variable-length fields
 796          *            such as owner/group.
 797          */
 798         len = 16;
 799
 800         /* Sigh */
 801         if (iap->ia_valid & ATTR_SIZE)
 802                 len += 8;
 803         if (iap->ia_valid & ATTR_MODE)
 804                 len += 4;
 805         if (iap->ia_valid & ATTR_UID) {
 806                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 807                 if (owner_namelen < 0) {
 808                         dprintk("nfs: couldn't resolve uid %d to string\n",
 809                                         iap->ia_uid);
 810                         /* XXX */
 811                         strcpy(owner_name, "nobody");
 812                         owner_namelen = sizeof("nobody") - 1;
 813                         /* goto out; */
 814                 }
 815                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 816         }
 817         if (iap->ia_valid & ATTR_GID) {
 818                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 819                 if (owner_grouplen < 0) {
 820                         dprintk("nfs: couldn't resolve gid %d to string\n",
 821                                         iap->ia_gid);
 822                         strcpy(owner_group, "nobody");
 823                         owner_grouplen = sizeof("nobody") - 1;
 824                         /* goto out; */
 825                 }
 826                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 827         }
 828         if (iap->ia_valid & ATTR_ATIME_SET)
 829                 len += 16;
 830         else if (iap->ia_valid & ATTR_ATIME)
 831                 len += 4;
 832         if (iap->ia_valid & ATTR_MTIME_SET)
 833                 len += 16;
 834         else if (iap->ia_valid & ATTR_MTIME)
 835                 len += 4;
 836         p = reserve_space(xdr, len);
 837
 838         /*
 839          * We write the bitmap length now, but leave the bitmap and the attribute
 840          * buffer length to be backfilled at the end of this routine.
 841          */
 842         *p++ = cpu_to_be32(2);
 843         q = p;
 844         p += 3;
 845
 846         if (iap->ia_valid & ATTR_SIZE) {
 847                 bmval0 |= FATTR4_WORD0_SIZE;
 848                 p = xdr_encode_hyper(p, iap->ia_size);
 849         }
 850         if (iap->ia_valid & ATTR_MODE) {
 851                 bmval1 |= FATTR4_WORD1_MODE;
 852                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 853         }
 854         if (iap->ia_valid & ATTR_UID) {
 855                 bmval1 |= FATTR4_WORD1_OWNER;
 856                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 857         }
 858         if (iap->ia_valid & ATTR_GID) {
 859                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 860                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 861         }
 862         if (iap->ia_valid & ATTR_ATIME_SET) {
 863                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 864                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 865                 *p++ = cpu_to_be32(0);
 866                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 867                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 868         }
 869         else if (iap->ia_valid & ATTR_ATIME) {
 870                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 871                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 872         }
 873         if (iap->ia_valid & ATTR_MTIME_SET) {
 874                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 875                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 876                 *p++ = cpu_to_be32(0);
 877                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 878                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 879         }
 880         else if (iap->ia_valid & ATTR_MTIME) {
 881                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 882                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 883         }
 884
 885         /*
 886          * Now we backfill the bitmap and the attribute buffer length.
 887          */
 888         if (len != ((char *)p - (char *)q) + 4) {
 889                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 890                                 len, ((char *)p - (char *)q) + 4);
 891                 BUG();
 892         }
 893         len = (char *)p - (char *)q - 12;
 894         *q++ = htonl(bmval0);
 895         *q++ = htonl(bmval1);
 896         *q = htonl(len);
 897
 898 /* out: */
 899 }
 900
 901 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 902 {
 903         __be32 *p;
 904
 905         p = reserve_space(xdr, 8);
 906         *p++ = cpu_to_be32(OP_ACCESS);
 907         *p = cpu_to_be32(access);
 908         hdr->nops++;
 909         hdr->replen += decode_access_maxsz;
 910 }
 911
 912 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 913 {
 914         __be32 *p;
 915
 916         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 917         *p++ = cpu_to_be32(OP_CLOSE);
 918         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 919         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 920         hdr->nops++;
 921         hdr->replen += decode_close_maxsz;
 922 }
 923
 924 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 925 {
 926         __be32 *p;
 927
 928         p = reserve_space(xdr, 16);
 929         *p++ = cpu_to_be32(OP_COMMIT);
 930         p = xdr_encode_hyper(p, args->offset);
 931         *p = cpu_to_be32(args->count);
 932         hdr->nops++;
 933         hdr->replen += decode_commit_maxsz;
 934 }
 935
 936 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 937 {
 938         __be32 *p;
 939
 940         p = reserve_space(xdr, 8);
 941         *p++ = cpu_to_be32(OP_CREATE);
 942         *p = cpu_to_be32(create->ftype);
 943
 944         switch (create->ftype) {
 945         case NF4LNK:
 946                 p = reserve_space(xdr, 4);
 947                 *p = cpu_to_be32(create->u.symlink.len);
 948                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 949                 break;
 950
 951         case NF4BLK: case NF4CHR:
 952                 p = reserve_space(xdr, 8);
 953                 *p++ = cpu_to_be32(create->u.device.specdata1);
 954                 *p = cpu_to_be32(create->u.device.specdata2);
 955                 break;
 956
 957         default:
 958                 break;
 959         }
 960
 961         encode_string(xdr, create->name->len, create->name->name);
 962         hdr->nops++;
 963         hdr->replen += decode_create_maxsz;
 964
 965         encode_attrs(xdr, create->attrs, create->server);
 966 }
 967
 968 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 969 {
 970         __be32 *p;
 971
 972         p = reserve_space(xdr, 12);
 973         *p++ = cpu_to_be32(OP_GETATTR);
 974         *p++ = cpu_to_be32(1);
 975         *p = cpu_to_be32(bitmap);
 976         hdr->nops++;
 977         hdr->replen += decode_getattr_maxsz;
 978 }
 979
 980 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 981 {
 982         __be32 *p;
 983
 984         p = reserve_space(xdr, 16);
 985         *p++ = cpu_to_be32(OP_GETATTR);
 986         *p++ = cpu_to_be32(2);
 987         *p++ = cpu_to_be32(bm0);
 988         *p = cpu_to_be32(bm1);
 989         hdr->nops++;
 990         hdr->replen += decode_getattr_maxsz;
 991 }
 992
 993 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 994 {
 995         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 996                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 997 }
 998
 999 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1000 {
1001         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1002                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1003 }
1004
1005 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1006 {
1007         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1008                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1009 }
1010
1011 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1012 {
1013         __be32 *p;
1014
1015         p = reserve_space(xdr, 4);
1016         *p = cpu_to_be32(OP_GETFH);
1017         hdr->nops++;
1018         hdr->replen += decode_getfh_maxsz;
1019 }
1020
1021 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1022 {
1023         __be32 *p;
1024
1025         p = reserve_space(xdr, 8 + name->len);
1026         *p++ = cpu_to_be32(OP_LINK);
1027         xdr_encode_opaque(p, name->name, name->len);
1028         hdr->nops++;
1029         hdr->replen += decode_link_maxsz;
1030 }
1031
1032 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1033 {
1034         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1035                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1036         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1037 }
1038
1039 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1040 {
1041         if (fl->fl_end == OFFSET_MAX)
1042                 return ~(uint64_t)0;
1043         return fl->fl_end - fl->fl_start + 1;
1044 }
1045
1046 /*
1047  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1048  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1049  */
1050 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1051 {
1052         __be32 *p;
1053
1054         p = reserve_space(xdr, 32);
1055         *p++ = cpu_to_be32(OP_LOCK);
1056         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1057         *p++ = cpu_to_be32(args->reclaim);
1058         p = xdr_encode_hyper(p, args->fl->fl_start);
1059         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1060         *p = cpu_to_be32(args->new_lock_owner);
1061         if (args->new_lock_owner){
1062                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+32);
1063                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1064                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1065                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1066                 p = xdr_encode_hyper(p, args->lock_owner.clientid);
1067                 *p++ = cpu_to_be32(16);
1068                 p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1069                 xdr_encode_hyper(p, args->lock_owner.id);
1070         }
1071         else {
1072                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1073                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1074                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1075         }
1076         hdr->nops++;
1077         hdr->replen += decode_lock_maxsz;
1078 }
1079
1080 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1081 {
1082         __be32 *p;
1083
1084         p = reserve_space(xdr, 52);
1085         *p++ = cpu_to_be32(OP_LOCKT);
1086         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1087         p = xdr_encode_hyper(p, args->fl->fl_start);
1088         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1089         p = xdr_encode_hyper(p, args->lock_owner.clientid);
1090         *p++ = cpu_to_be32(16);
1091         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1092         xdr_encode_hyper(p, args->lock_owner.id);
1093         hdr->nops++;
1094         hdr->replen += decode_lockt_maxsz;
1095 }
1096
1097 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1098 {
1099         __be32 *p;
1100
1101         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1102         *p++ = cpu_to_be32(OP_LOCKU);
1103         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1104         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1105         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1106         p = xdr_encode_hyper(p, args->fl->fl_start);
1107         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1108         hdr->nops++;
1109         hdr->replen += decode_locku_maxsz;
1110 }
1111
1112 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1113 {
1114         int len = name->len;
1115         __be32 *p;
1116
1117         p = reserve_space(xdr, 8 + len);
1118         *p++ = cpu_to_be32(OP_LOOKUP);
1119         xdr_encode_opaque(p, name->name, len);
1120         hdr->nops++;
1121         hdr->replen += decode_lookup_maxsz;
1122 }
1123
1124 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1125 {
1126         __be32 *p;
1127
1128         p = reserve_space(xdr, 8);
1129         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1130         case FMODE_READ:
1131                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1132                 break;
1133         case FMODE_WRITE:
1134                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1135                 break;
1136         case FMODE_READ|FMODE_WRITE:
1137                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1138                 break;
1139         default:
1140                 *p++ = cpu_to_be32(0);
1141         }
1142         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1143 }
1144
1145 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1146 {
1147         __be32 *p;
1148  /*
1149  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1150  * owner 4 = 32
1151  */
1152         p = reserve_space(xdr, 8);
1153         *p++ = cpu_to_be32(OP_OPEN);
1154         *p = cpu_to_be32(arg->seqid->sequence->counter);
1155         encode_share_access(xdr, arg->fmode);
1156         p = reserve_space(xdr, 28);
1157         p = xdr_encode_hyper(p, arg->clientid);
1158         *p++ = cpu_to_be32(16);
1159         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1160         xdr_encode_hyper(p, arg->id);
1161 }
1162
1163 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1164 {
1165         __be32 *p;
1166         struct nfs_client *clp;
1167
1168         p = reserve_space(xdr, 4);
1169         switch(arg->open_flags & O_EXCL) {
1170         case 0:
1171                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1172                 encode_attrs(xdr, arg->u.attrs, arg->server);
1173                 break;
1174         default:
1175                 clp = arg->server->nfs_client;
1176                 if (clp->cl_minorversion > 0) {
1177                         if (nfs4_has_persistent_session(clp)) {
1178                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1179                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1180                         } else {
1181                                 struct iattr dummy;
1182
1183                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1184                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1185                                 dummy.ia_valid = 0;
1186                                 encode_attrs(xdr, &dummy, arg->server);
1187                         }
1188                 } else {
1189                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1190                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1191                 }
1192         }
1193 }
1194
1195 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1196 {
1197         __be32 *p;
1198
1199         p = reserve_space(xdr, 4);
1200         switch (arg->open_flags & O_CREAT) {
1201         case 0:
1202                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1203                 break;
1204         default:
1205                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1206                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1207                 encode_createmode(xdr, arg);
1208         }
1209 }
1210
1211 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1212 {
1213         __be32 *p;
1214
1215         p = reserve_space(xdr, 4);
1216         switch (delegation_type) {
1217         case 0:
1218                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1219                 break;
1220         case FMODE_READ:
1221                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1222                 break;
1223         case FMODE_WRITE|FMODE_READ:
1224                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1225                 break;
1226         default:
1227                 BUG();
1228         }
1229 }
1230
1231 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1232 {
1233         __be32 *p;
1234
1235         p = reserve_space(xdr, 4);
1236         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1237         encode_string(xdr, name->len, name->name);
1238 }
1239
1240 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1241 {
1242         __be32 *p;
1243
1244         p = reserve_space(xdr, 4);
1245         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1246         encode_delegation_type(xdr, type);
1247 }
1248
1249 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1250 {
1251         __be32 *p;
1252
1253         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1254         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1255         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1256         encode_string(xdr, name->len, name->name);
1257 }
1258
1259 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1260 {
1261         encode_openhdr(xdr, arg);
1262         encode_opentype(xdr, arg);
1263         switch (arg->claim) {
1264         case NFS4_OPEN_CLAIM_NULL:
1265                 encode_claim_null(xdr, arg->name);
1266                 break;
1267         case NFS4_OPEN_CLAIM_PREVIOUS:
1268                 encode_claim_previous(xdr, arg->u.delegation_type);
1269                 break;
1270         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1271                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1272                 break;
1273         default:
1274                 BUG();
1275         }
1276         hdr->nops++;
1277         hdr->replen += decode_open_maxsz;
1278 }
1279
1280 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1281 {
1282         __be32 *p;
1283
1284         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1285         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1286         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1287         *p = cpu_to_be32(arg->seqid->sequence->counter);
1288         hdr->nops++;
1289         hdr->replen += decode_open_confirm_maxsz;
1290 }
1291
1292 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1293 {
1294         __be32 *p;
1295
1296         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1297         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1298         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1299         *p = cpu_to_be32(arg->seqid->sequence->counter);
1300         encode_share_access(xdr, arg->fmode);
1301         hdr->nops++;
1302         hdr->replen += decode_open_downgrade_maxsz;
1303 }
1304
1305 static void
1306 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1307 {
1308         int len = fh->size;
1309         __be32 *p;
1310
1311         p = reserve_space(xdr, 8 + len);
1312         *p++ = cpu_to_be32(OP_PUTFH);
1313         xdr_encode_opaque(p, fh->data, len);
1314         hdr->nops++;
1315         hdr->replen += decode_putfh_maxsz;
1316 }
1317
1318 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1319 {
1320         __be32 *p;
1321
1322         p = reserve_space(xdr, 4);
1323         *p = cpu_to_be32(OP_PUTROOTFH);
1324         hdr->nops++;
1325         hdr->replen += decode_putrootfh_maxsz;
1326 }
1327
1328 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1329 {
1330         nfs4_stateid stateid;
1331         __be32 *p;
1332
1333         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1334         if (ctx->state != NULL) {
1335                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1336                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1337         } else
1338                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1339 }
1340
1341 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1342 {
1343         __be32 *p;
1344
1345         p = reserve_space(xdr, 4);
1346         *p = cpu_to_be32(OP_READ);
1347
1348         encode_stateid(xdr, args->context);
1349
1350         p = reserve_space(xdr, 12);
1351         p = xdr_encode_hyper(p, args->offset);
1352         *p = cpu_to_be32(args->count);
1353         hdr->nops++;
1354         hdr->replen += decode_read_maxsz;
1355 }
1356
1357 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1358 {
1359         uint32_t attrs[2] = {
1360                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1361                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1362         };
1363         __be32 *p;
1364
1365         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1366         *p++ = cpu_to_be32(OP_READDIR);
1367         p = xdr_encode_hyper(p, readdir->cookie);
1368         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1369         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1370         *p++ = cpu_to_be32(readdir->count);
1371         *p++ = cpu_to_be32(2);
1372         /* Switch to mounted_on_fileid if the server supports it */
1373         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1374                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1375         else
1376                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1377         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1378         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1379         hdr->nops++;
1380         hdr->replen += decode_readdir_maxsz;
1381         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1382                         __func__,
1383                         (unsigned long long)readdir->cookie,
1384                         ((u32 *)readdir->verifier.data)[0],
1385                         ((u32 *)readdir->verifier.data)[1],
1386                         attrs[0] & readdir->bitmask[0],
1387                         attrs[1] & readdir->bitmask[1]);
1388 }
1389
1390 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1391 {
1392         __be32 *p;
1393
1394         p = reserve_space(xdr, 4);
1395         *p = cpu_to_be32(OP_READLINK);
1396         hdr->nops++;
1397         hdr->replen += decode_readlink_maxsz;
1398 }
1399
1400 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1401 {
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 8 + name->len);
1405         *p++ = cpu_to_be32(OP_REMOVE);
1406         xdr_encode_opaque(p, name->name, name->len);
1407         hdr->nops++;
1408         hdr->replen += decode_remove_maxsz;
1409 }
1410
1411 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1412 {
1413         __be32 *p;
1414
1415         p = reserve_space(xdr, 4);
1416         *p = cpu_to_be32(OP_RENAME);
1417         encode_string(xdr, oldname->len, oldname->name);
1418         encode_string(xdr, newname->len, newname->name);
1419         hdr->nops++;
1420         hdr->replen += decode_rename_maxsz;
1421 }
1422
1423 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1424 {
1425         __be32 *p;
1426
1427         p = reserve_space(xdr, 12);
1428         *p++ = cpu_to_be32(OP_RENEW);
1429         xdr_encode_hyper(p, client_stateid->cl_clientid);
1430         hdr->nops++;
1431         hdr->replen += decode_renew_maxsz;
1432 }
1433
1434 static void
1435 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1436 {
1437         __be32 *p;
1438
1439         p = reserve_space(xdr, 4);
1440         *p = cpu_to_be32(OP_RESTOREFH);
1441         hdr->nops++;
1442         hdr->replen += decode_restorefh_maxsz;
1443 }
1444
1445 static int
1446 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1447 {
1448         __be32 *p;
1449
1450         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1451         *p++ = cpu_to_be32(OP_SETATTR);
1452         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1453         p = reserve_space(xdr, 2*4);
1454         *p++ = cpu_to_be32(1);
1455         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1456         if (arg->acl_len % 4)
1457                 return -EINVAL;
1458         p = reserve_space(xdr, 4);
1459         *p = cpu_to_be32(arg->acl_len);
1460         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1461         hdr->nops++;
1462         hdr->replen += decode_setacl_maxsz;
1463         return 0;
1464 }
1465
1466 static void
1467 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1468 {
1469         __be32 *p;
1470
1471         p = reserve_space(xdr, 4);
1472         *p = cpu_to_be32(OP_SAVEFH);
1473         hdr->nops++;
1474         hdr->replen += decode_savefh_maxsz;
1475 }
1476
1477 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1478 {
1479         __be32 *p;
1480
1481         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1482         *p++ = cpu_to_be32(OP_SETATTR);
1483         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1484         hdr->nops++;
1485         hdr->replen += decode_setattr_maxsz;
1486         encode_attrs(xdr, arg->iap, server);
1487 }
1488
1489 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1490 {
1491         __be32 *p;
1492
1493         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1494         *p++ = cpu_to_be32(OP_SETCLIENTID);
1495         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1496
1497         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1498         p = reserve_space(xdr, 4);
1499         *p = cpu_to_be32(setclientid->sc_prog);
1500         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1501         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1502         p = reserve_space(xdr, 4);
1503         *p = cpu_to_be32(setclientid->sc_cb_ident);
1504         hdr->nops++;
1505         hdr->replen += decode_setclientid_maxsz;
1506 }
1507
1508 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1509 {
1510         __be32 *p;
1511
1512         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1513         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1514         p = xdr_encode_hyper(p, client_state->cl_clientid);
1515         xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1516         hdr->nops++;
1517         hdr->replen += decode_setclientid_confirm_maxsz;
1518 }
1519
1520 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1521 {
1522         __be32 *p;
1523
1524         p = reserve_space(xdr, 4);
1525         *p = cpu_to_be32(OP_WRITE);
1526
1527         encode_stateid(xdr, args->context);
1528
1529         p = reserve_space(xdr, 16);
1530         p = xdr_encode_hyper(p, args->offset);
1531         *p++ = cpu_to_be32(args->stable);
1532         *p = cpu_to_be32(args->count);
1533
1534         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1535         hdr->nops++;
1536         hdr->replen += decode_write_maxsz;
1537 }
1538
1539 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1540 {
1541         __be32 *p;
1542
1543         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1544
1545         *p++ = cpu_to_be32(OP_DELEGRETURN);
1546         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1547         hdr->nops++;
1548         hdr->replen += decode_delegreturn_maxsz;
1549 }
1550
1551 #if defined(CONFIG_NFS_V4_1)
1552 /* NFSv4.1 operations */
1553 static void encode_exchange_id(struct xdr_stream *xdr,
1554                                struct nfs41_exchange_id_args *args,
1555                                struct compound_hdr *hdr)
1556 {
1557         __be32 *p;
1558
1559         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1560         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1561         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1562
1563         encode_string(xdr, args->id_len, args->id);
1564
1565         p = reserve_space(xdr, 12);
1566         *p++ = cpu_to_be32(args->flags);
1567         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1568         *p = cpu_to_be32(0);    /* zero length implementation id array */
1569         hdr->nops++;
1570         hdr->replen += decode_exchange_id_maxsz;
1571 }
1572
1573 static void encode_create_session(struct xdr_stream *xdr,
1574                                   struct nfs41_create_session_args *args,
1575                                   struct compound_hdr *hdr)
1576 {
1577         __be32 *p;
1578         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1579         uint32_t len;
1580         struct nfs_client *clp = args->client;
1581
1582         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1583                         clp->cl_ipaddr);
1584
1585         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1586         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1587         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1588         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1589         *p++ = cpu_to_be32(args->flags);                        /*flags */
1590
1591         /* Fore Channel */
1592         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1593         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1594         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1595         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1596         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1597         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1598         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1599
1600         /* Back Channel */
1601         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1602         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1603         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1604         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1605         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1606         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1607         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1608
1609         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1610         *p++ = cpu_to_be32(1);
1611         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1612
1613         /* authsys_parms rfc1831 */
1614         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1615         p = xdr_encode_opaque(p, machine_name, len);
1616         *p++ = cpu_to_be32(0);                          /* UID */
1617         *p++ = cpu_to_be32(0);                          /* GID */
1618         *p = cpu_to_be32(0);                            /* No more gids */
1619         hdr->nops++;
1620         hdr->replen += decode_create_session_maxsz;
1621 }
1622
1623 static void encode_destroy_session(struct xdr_stream *xdr,
1624                                    struct nfs4_session *session,
1625                                    struct compound_hdr *hdr)
1626 {
1627         __be32 *p;
1628         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1629         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1630         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1631         hdr->nops++;
1632         hdr->replen += decode_destroy_session_maxsz;
1633 }
1634
1635 static void encode_reclaim_complete(struct xdr_stream *xdr,
1636                                     struct nfs41_reclaim_complete_args *args,
1637                                     struct compound_hdr *hdr)
1638 {
1639         __be32 *p;
1640
1641         p = reserve_space(xdr, 8);
1642         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1643         *p++ = cpu_to_be32(args->one_fs);
1644         hdr->nops++;
1645         hdr->replen += decode_reclaim_complete_maxsz;
1646 }
1647 #endif /* CONFIG_NFS_V4_1 */
1648
1649 static void encode_sequence(struct xdr_stream *xdr,
1650                             const struct nfs4_sequence_args *args,
1651                             struct compound_hdr *hdr)
1652 {
1653 #if defined(CONFIG_NFS_V4_1)
1654         struct nfs4_session *session = args->sa_session;
1655         struct nfs4_slot_table *tp;
1656         struct nfs4_slot *slot;
1657         __be32 *p;
1658
1659         if (!session)
1660                 return;
1661
1662         tp = &session->fc_slot_table;
1663
1664         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1665         slot = tp->slots + args->sa_slotid;
1666
1667         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1668         *p++ = cpu_to_be32(OP_SEQUENCE);
1669
1670         /*
1671          * Sessionid + seqid + slotid + max slotid + cache_this
1672          */
1673         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1674                 "max_slotid=%d cache_this=%d\n",
1675                 __func__,
1676                 ((u32 *)session->sess_id.data)[0],
1677                 ((u32 *)session->sess_id.data)[1],
1678                 ((u32 *)session->sess_id.data)[2],
1679                 ((u32 *)session->sess_id.data)[3],
1680                 slot->seq_nr, args->sa_slotid,
1681                 tp->highest_used_slotid, args->sa_cache_this);
1682         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1683         *p++ = cpu_to_be32(slot->seq_nr);
1684         *p++ = cpu_to_be32(args->sa_slotid);
1685         *p++ = cpu_to_be32(tp->highest_used_slotid);
1686         *p = cpu_to_be32(args->sa_cache_this);
1687         hdr->nops++;
1688         hdr->replen += decode_sequence_maxsz;
1689 #endif /* CONFIG_NFS_V4_1 */
1690 }
1691
1692 /*
1693  * END OF "GENERIC" ENCODE ROUTINES.
1694  */
1695
1696 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1697 {
1698 #if defined(CONFIG_NFS_V4_1)
1699         if (args->sa_session)
1700                 return args->sa_session->clp->cl_minorversion;
1701 #endif /* CONFIG_NFS_V4_1 */
1702         return 0;
1703 }
1704
1705 /*
1706  * Encode an ACCESS request
1707  */
1708 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1709 {
1710         struct xdr_stream xdr;
1711         struct compound_hdr hdr = {
1712                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1713         };
1714
1715         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1716         encode_compound_hdr(&xdr, req, &hdr);
1717         encode_sequence(&xdr, &args->seq_args, &hdr);
1718         encode_putfh(&xdr, args->fh, &hdr);
1719         encode_access(&xdr, args->access, &hdr);
1720         encode_getfattr(&xdr, args->bitmask, &hdr);
1721         encode_nops(&hdr);
1722         return 0;
1723 }
1724
1725 /*
1726  * Encode LOOKUP request
1727  */
1728 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1729 {
1730         struct xdr_stream xdr;
1731         struct compound_hdr hdr = {
1732                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1733         };
1734
1735         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1736         encode_compound_hdr(&xdr, req, &hdr);
1737         encode_sequence(&xdr, &args->seq_args, &hdr);
1738         encode_putfh(&xdr, args->dir_fh, &hdr);
1739         encode_lookup(&xdr, args->name, &hdr);
1740         encode_getfh(&xdr, &hdr);
1741         encode_getfattr(&xdr, args->bitmask, &hdr);
1742         encode_nops(&hdr);
1743         return 0;
1744 }
1745
1746 /*
1747  * Encode LOOKUP_ROOT request
1748  */
1749 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1750 {
1751         struct xdr_stream xdr;
1752         struct compound_hdr hdr = {
1753                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1754         };
1755
1756         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1757         encode_compound_hdr(&xdr, req, &hdr);
1758         encode_sequence(&xdr, &args->seq_args, &hdr);
1759         encode_putrootfh(&xdr, &hdr);
1760         encode_getfh(&xdr, &hdr);
1761         encode_getfattr(&xdr, args->bitmask, &hdr);
1762         encode_nops(&hdr);
1763         return 0;
1764 }
1765
1766 /*
1767  * Encode REMOVE request
1768  */
1769 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1770 {
1771         struct xdr_stream xdr;
1772         struct compound_hdr hdr = {
1773                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1774         };
1775
1776         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1777         encode_compound_hdr(&xdr, req, &hdr);
1778         encode_sequence(&xdr, &args->seq_args, &hdr);
1779         encode_putfh(&xdr, args->fh, &hdr);
1780         encode_remove(&xdr, &args->name, &hdr);
1781         encode_getfattr(&xdr, args->bitmask, &hdr);
1782         encode_nops(&hdr);
1783         return 0;
1784 }
1785
1786 /*
1787  * Encode RENAME request
1788  */
1789 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1790 {
1791         struct xdr_stream xdr;
1792         struct compound_hdr hdr = {
1793                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1794         };
1795
1796         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1797         encode_compound_hdr(&xdr, req, &hdr);
1798         encode_sequence(&xdr, &args->seq_args, &hdr);
1799         encode_putfh(&xdr, args->old_dir, &hdr);
1800         encode_savefh(&xdr, &hdr);
1801         encode_putfh(&xdr, args->new_dir, &hdr);
1802         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1803         encode_getfattr(&xdr, args->bitmask, &hdr);
1804         encode_restorefh(&xdr, &hdr);
1805         encode_getfattr(&xdr, args->bitmask, &hdr);
1806         encode_nops(&hdr);
1807         return 0;
1808 }
1809
1810 /*
1811  * Encode LINK request
1812  */
1813 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1814 {
1815         struct xdr_stream xdr;
1816         struct compound_hdr hdr = {
1817                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1818         };
1819
1820         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1821         encode_compound_hdr(&xdr, req, &hdr);
1822         encode_sequence(&xdr, &args->seq_args, &hdr);
1823         encode_putfh(&xdr, args->fh, &hdr);
1824         encode_savefh(&xdr, &hdr);
1825         encode_putfh(&xdr, args->dir_fh, &hdr);
1826         encode_link(&xdr, args->name, &hdr);
1827         encode_getfattr(&xdr, args->bitmask, &hdr);
1828         encode_restorefh(&xdr, &hdr);
1829         encode_getfattr(&xdr, args->bitmask, &hdr);
1830         encode_nops(&hdr);
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode CREATE request
1836  */
1837 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *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->dir_fh, &hdr);
1848         encode_savefh(&xdr, &hdr);
1849         encode_create(&xdr, args, &hdr);
1850         encode_getfh(&xdr, &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 SYMLINK request
1860  */
1861 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1862 {
1863         return nfs4_xdr_enc_create(req, p, args);
1864 }
1865
1866 /*
1867  * Encode GETATTR request
1868  */
1869 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1870 {
1871         struct xdr_stream xdr;
1872         struct compound_hdr hdr = {
1873                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1874         };
1875
1876         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1877         encode_compound_hdr(&xdr, req, &hdr);
1878         encode_sequence(&xdr, &args->seq_args, &hdr);
1879         encode_putfh(&xdr, args->fh, &hdr);
1880         encode_getfattr(&xdr, args->bitmask, &hdr);
1881         encode_nops(&hdr);
1882         return 0;
1883 }
1884
1885 /*
1886  * Encode a CLOSE request
1887  */
1888 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1889 {
1890         struct xdr_stream xdr;
1891         struct compound_hdr hdr = {
1892                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1893         };
1894
1895         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1896         encode_compound_hdr(&xdr, req, &hdr);
1897         encode_sequence(&xdr, &args->seq_args, &hdr);
1898         encode_putfh(&xdr, args->fh, &hdr);
1899         encode_close(&xdr, args, &hdr);
1900         encode_getfattr(&xdr, args->bitmask, &hdr);
1901         encode_nops(&hdr);
1902         return 0;
1903 }
1904
1905 /*
1906  * Encode an OPEN request
1907  */
1908 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1909 {
1910         struct xdr_stream xdr;
1911         struct compound_hdr hdr = {
1912                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1913         };
1914
1915         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1916         encode_compound_hdr(&xdr, req, &hdr);
1917         encode_sequence(&xdr, &args->seq_args, &hdr);
1918         encode_putfh(&xdr, args->fh, &hdr);
1919         encode_savefh(&xdr, &hdr);
1920         encode_open(&xdr, args, &hdr);
1921         encode_getfh(&xdr, &hdr);
1922         encode_getfattr(&xdr, args->bitmask, &hdr);
1923         encode_restorefh(&xdr, &hdr);
1924         encode_getfattr(&xdr, args->bitmask, &hdr);
1925         encode_nops(&hdr);
1926         return 0;
1927 }
1928
1929 /*
1930  * Encode an OPEN_CONFIRM request
1931  */
1932 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1933 {
1934         struct xdr_stream xdr;
1935         struct compound_hdr hdr = {
1936                 .nops   = 0,
1937         };
1938
1939         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1940         encode_compound_hdr(&xdr, req, &hdr);
1941         encode_putfh(&xdr, args->fh, &hdr);
1942         encode_open_confirm(&xdr, args, &hdr);
1943         encode_nops(&hdr);
1944         return 0;
1945 }
1946
1947 /*
1948  * Encode an OPEN request with no attributes.
1949  */
1950 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1951 {
1952         struct xdr_stream xdr;
1953         struct compound_hdr hdr = {
1954                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1955         };
1956
1957         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1958         encode_compound_hdr(&xdr, req, &hdr);
1959         encode_sequence(&xdr, &args->seq_args, &hdr);
1960         encode_putfh(&xdr, args->fh, &hdr);
1961         encode_open(&xdr, args, &hdr);
1962         encode_getfattr(&xdr, args->bitmask, &hdr);
1963         encode_nops(&hdr);
1964         return 0;
1965 }
1966
1967 /*
1968  * Encode an OPEN_DOWNGRADE request
1969  */
1970 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1971 {
1972         struct xdr_stream xdr;
1973         struct compound_hdr hdr = {
1974                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1975         };
1976
1977         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1978         encode_compound_hdr(&xdr, req, &hdr);
1979         encode_sequence(&xdr, &args->seq_args, &hdr);
1980         encode_putfh(&xdr, args->fh, &hdr);
1981         encode_open_downgrade(&xdr, args, &hdr);
1982         encode_getfattr(&xdr, args->bitmask, &hdr);
1983         encode_nops(&hdr);
1984         return 0;
1985 }
1986
1987 /*
1988  * Encode a LOCK request
1989  */
1990 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1991 {
1992         struct xdr_stream xdr;
1993         struct compound_hdr hdr = {
1994                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1995         };
1996
1997         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1998         encode_compound_hdr(&xdr, req, &hdr);
1999         encode_sequence(&xdr, &args->seq_args, &hdr);
2000         encode_putfh(&xdr, args->fh, &hdr);
2001         encode_lock(&xdr, args, &hdr);
2002         encode_nops(&hdr);
2003         return 0;
2004 }
2005
2006 /*
2007  * Encode a LOCKT request
2008  */
2009 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2010 {
2011         struct xdr_stream xdr;
2012         struct compound_hdr hdr = {
2013                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2014         };
2015
2016         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2017         encode_compound_hdr(&xdr, req, &hdr);
2018         encode_sequence(&xdr, &args->seq_args, &hdr);
2019         encode_putfh(&xdr, args->fh, &hdr);
2020         encode_lockt(&xdr, args, &hdr);
2021         encode_nops(&hdr);
2022         return 0;
2023 }
2024
2025 /*
2026  * Encode a LOCKU request
2027  */
2028 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2029 {
2030         struct xdr_stream xdr;
2031         struct compound_hdr hdr = {
2032                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2033         };
2034
2035         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2036         encode_compound_hdr(&xdr, req, &hdr);
2037         encode_sequence(&xdr, &args->seq_args, &hdr);
2038         encode_putfh(&xdr, args->fh, &hdr);
2039         encode_locku(&xdr, args, &hdr);
2040         encode_nops(&hdr);
2041         return 0;
2042 }
2043
2044 /*
2045  * Encode a READLINK request
2046  */
2047 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2048 {
2049         struct xdr_stream xdr;
2050         struct compound_hdr hdr = {
2051                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2052         };
2053
2054         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2055         encode_compound_hdr(&xdr, req, &hdr);
2056         encode_sequence(&xdr, &args->seq_args, &hdr);
2057         encode_putfh(&xdr, args->fh, &hdr);
2058         encode_readlink(&xdr, args, req, &hdr);
2059
2060         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2061                         args->pgbase, args->pglen);
2062         encode_nops(&hdr);
2063         return 0;
2064 }
2065
2066 /*
2067  * Encode a READDIR request
2068  */
2069 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2070 {
2071         struct xdr_stream xdr;
2072         struct compound_hdr hdr = {
2073                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2074         };
2075
2076         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2077         encode_compound_hdr(&xdr, req, &hdr);
2078         encode_sequence(&xdr, &args->seq_args, &hdr);
2079         encode_putfh(&xdr, args->fh, &hdr);
2080         encode_readdir(&xdr, args, req, &hdr);
2081
2082         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2083                          args->pgbase, args->count);
2084         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2085                         __func__, hdr.replen << 2, args->pages,
2086                         args->pgbase, args->count);
2087         encode_nops(&hdr);
2088         return 0;
2089 }
2090
2091 /*
2092  * Encode a READ request
2093  */
2094 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2095 {
2096         struct xdr_stream xdr;
2097         struct compound_hdr hdr = {
2098                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099         };
2100
2101         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2102         encode_compound_hdr(&xdr, req, &hdr);
2103         encode_sequence(&xdr, &args->seq_args, &hdr);
2104         encode_putfh(&xdr, args->fh, &hdr);
2105         encode_read(&xdr, args, &hdr);
2106
2107         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2108                          args->pages, args->pgbase, args->count);
2109         req->rq_rcv_buf.flags |= XDRBUF_READ;
2110         encode_nops(&hdr);
2111         return 0;
2112 }
2113
2114 /*
2115  * Encode an SETATTR request
2116  */
2117 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2118 {
2119         struct xdr_stream xdr;
2120         struct compound_hdr hdr = {
2121                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2122         };
2123
2124         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2125         encode_compound_hdr(&xdr, req, &hdr);
2126         encode_sequence(&xdr, &args->seq_args, &hdr);
2127         encode_putfh(&xdr, args->fh, &hdr);
2128         encode_setattr(&xdr, args, args->server, &hdr);
2129         encode_getfattr(&xdr, args->bitmask, &hdr);
2130         encode_nops(&hdr);
2131         return 0;
2132 }
2133
2134 /*
2135  * Encode a GETACL request
2136  */
2137 static int
2138 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2139                 struct nfs_getaclargs *args)
2140 {
2141         struct xdr_stream xdr;
2142         struct compound_hdr hdr = {
2143                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2144         };
2145         uint32_t replen;
2146
2147         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2148         encode_compound_hdr(&xdr, req, &hdr);
2149         encode_sequence(&xdr, &args->seq_args, &hdr);
2150         encode_putfh(&xdr, args->fh, &hdr);
2151         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2152         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2153
2154         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2155                 args->acl_pages, args->acl_pgbase, args->acl_len);
2156         encode_nops(&hdr);
2157         return 0;
2158 }
2159
2160 /*
2161  * Encode a WRITE request
2162  */
2163 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2164 {
2165         struct xdr_stream xdr;
2166         struct compound_hdr hdr = {
2167                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2168         };
2169
2170         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2171         encode_compound_hdr(&xdr, req, &hdr);
2172         encode_sequence(&xdr, &args->seq_args, &hdr);
2173         encode_putfh(&xdr, args->fh, &hdr);
2174         encode_write(&xdr, args, &hdr);
2175         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2176         encode_getfattr(&xdr, args->bitmask, &hdr);
2177         encode_nops(&hdr);
2178         return 0;
2179 }
2180
2181 /*
2182  *  a COMMIT request
2183  */
2184 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2185 {
2186         struct xdr_stream xdr;
2187         struct compound_hdr hdr = {
2188                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2189         };
2190
2191         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2192         encode_compound_hdr(&xdr, req, &hdr);
2193         encode_sequence(&xdr, &args->seq_args, &hdr);
2194         encode_putfh(&xdr, args->fh, &hdr);
2195         encode_commit(&xdr, args, &hdr);
2196         encode_getfattr(&xdr, args->bitmask, &hdr);
2197         encode_nops(&hdr);
2198         return 0;
2199 }
2200
2201 /*
2202  * FSINFO request
2203  */
2204 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2205 {
2206         struct xdr_stream xdr;
2207         struct compound_hdr hdr = {
2208                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2209         };
2210
2211         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2212         encode_compound_hdr(&xdr, req, &hdr);
2213         encode_sequence(&xdr, &args->seq_args, &hdr);
2214         encode_putfh(&xdr, args->fh, &hdr);
2215         encode_fsinfo(&xdr, args->bitmask, &hdr);
2216         encode_nops(&hdr);
2217         return 0;
2218 }
2219
2220 /*
2221  * a PATHCONF request
2222  */
2223 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2224 {
2225         struct xdr_stream xdr;
2226         struct compound_hdr hdr = {
2227                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228         };
2229
2230         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2231         encode_compound_hdr(&xdr, req, &hdr);
2232         encode_sequence(&xdr, &args->seq_args, &hdr);
2233         encode_putfh(&xdr, args->fh, &hdr);
2234         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2235                            &hdr);
2236         encode_nops(&hdr);
2237         return 0;
2238 }
2239
2240 /*
2241  * a STATFS request
2242  */
2243 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2244 {
2245         struct xdr_stream xdr;
2246         struct compound_hdr hdr = {
2247                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2248         };
2249
2250         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2251         encode_compound_hdr(&xdr, req, &hdr);
2252         encode_sequence(&xdr, &args->seq_args, &hdr);
2253         encode_putfh(&xdr, args->fh, &hdr);
2254         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2255                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2256         encode_nops(&hdr);
2257         return 0;
2258 }
2259
2260 /*
2261  * GETATTR_BITMAP request
2262  */
2263 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2264                                     struct nfs4_server_caps_arg *args)
2265 {
2266         struct xdr_stream xdr;
2267         struct compound_hdr hdr = {
2268                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2269         };
2270
2271         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2272         encode_compound_hdr(&xdr, req, &hdr);
2273         encode_sequence(&xdr, &args->seq_args, &hdr);
2274         encode_putfh(&xdr, args->fhandle, &hdr);
2275         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2276                            FATTR4_WORD0_LINK_SUPPORT|
2277                            FATTR4_WORD0_SYMLINK_SUPPORT|
2278                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2279         encode_nops(&hdr);
2280         return 0;
2281 }
2282
2283 /*
2284  * a RENEW request
2285  */
2286 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2287 {
2288         struct xdr_stream xdr;
2289         struct compound_hdr hdr = {
2290                 .nops   = 0,
2291         };
2292
2293         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2294         encode_compound_hdr(&xdr, req, &hdr);
2295         encode_renew(&xdr, clp, &hdr);
2296         encode_nops(&hdr);
2297         return 0;
2298 }
2299
2300 /*
2301  * a SETCLIENTID request
2302  */
2303 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2304 {
2305         struct xdr_stream xdr;
2306         struct compound_hdr hdr = {
2307                 .nops   = 0,
2308         };
2309
2310         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2311         encode_compound_hdr(&xdr, req, &hdr);
2312         encode_setclientid(&xdr, sc, &hdr);
2313         encode_nops(&hdr);
2314         return 0;
2315 }
2316
2317 /*
2318  * a SETCLIENTID_CONFIRM request
2319  */
2320 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2321 {
2322         struct xdr_stream xdr;
2323         struct compound_hdr hdr = {
2324                 .nops   = 0,
2325         };
2326         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2327
2328         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2329         encode_compound_hdr(&xdr, req, &hdr);
2330         encode_setclientid_confirm(&xdr, clp, &hdr);
2331         encode_putrootfh(&xdr, &hdr);
2332         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2333         encode_nops(&hdr);
2334         return 0;
2335 }
2336
2337 /*
2338  * DELEGRETURN request
2339  */
2340 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2341 {
2342         struct xdr_stream xdr;
2343         struct compound_hdr hdr = {
2344                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2345         };
2346
2347         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2348         encode_compound_hdr(&xdr, req, &hdr);
2349         encode_sequence(&xdr, &args->seq_args, &hdr);
2350         encode_putfh(&xdr, args->fhandle, &hdr);
2351         encode_delegreturn(&xdr, args->stateid, &hdr);
2352         encode_getfattr(&xdr, args->bitmask, &hdr);
2353         encode_nops(&hdr);
2354         return 0;
2355 }
2356
2357 /*
2358  * Encode FS_LOCATIONS request
2359  */
2360 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2361 {
2362         struct xdr_stream xdr;
2363         struct compound_hdr hdr = {
2364                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365         };
2366         uint32_t replen;
2367
2368         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2369         encode_compound_hdr(&xdr, req, &hdr);
2370         encode_sequence(&xdr, &args->seq_args, &hdr);
2371         encode_putfh(&xdr, args->dir_fh, &hdr);
2372         encode_lookup(&xdr, args->name, &hdr);
2373         replen = hdr.replen;    /* get the attribute into args->page */
2374         encode_fs_locations(&xdr, args->bitmask, &hdr);
2375
2376         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2377                         0, PAGE_SIZE);
2378         encode_nops(&hdr);
2379         return 0;
2380 }
2381
2382 #if defined(CONFIG_NFS_V4_1)
2383 /*
2384  * EXCHANGE_ID request
2385  */
2386 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2387                                     struct nfs41_exchange_id_args *args)
2388 {
2389         struct xdr_stream xdr;
2390         struct compound_hdr hdr = {
2391                 .minorversion = args->client->cl_minorversion,
2392         };
2393
2394         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2395         encode_compound_hdr(&xdr, req, &hdr);
2396         encode_exchange_id(&xdr, args, &hdr);
2397         encode_nops(&hdr);
2398         return 0;
2399 }
2400
2401 /*
2402  * a CREATE_SESSION request
2403  */
2404 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2405                                        struct nfs41_create_session_args *args)
2406 {
2407         struct xdr_stream xdr;
2408         struct compound_hdr hdr = {
2409                 .minorversion = args->client->cl_minorversion,
2410         };
2411
2412         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2413         encode_compound_hdr(&xdr, req, &hdr);
2414         encode_create_session(&xdr, args, &hdr);
2415         encode_nops(&hdr);
2416         return 0;
2417 }
2418
2419 /*
2420  * a DESTROY_SESSION request
2421  */
2422 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2423                                         struct nfs4_session *session)
2424 {
2425         struct xdr_stream xdr;
2426         struct compound_hdr hdr = {
2427                 .minorversion = session->clp->cl_minorversion,
2428         };
2429
2430         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2431         encode_compound_hdr(&xdr, req, &hdr);
2432         encode_destroy_session(&xdr, session, &hdr);
2433         encode_nops(&hdr);
2434         return 0;
2435 }
2436
2437 /*
2438  * a SEQUENCE request
2439  */
2440 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2441                                  struct nfs4_sequence_args *args)
2442 {
2443         struct xdr_stream xdr;
2444         struct compound_hdr hdr = {
2445                 .minorversion = nfs4_xdr_minorversion(args),
2446         };
2447
2448         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2449         encode_compound_hdr(&xdr, req, &hdr);
2450         encode_sequence(&xdr, args, &hdr);
2451         encode_nops(&hdr);
2452         return 0;
2453 }
2454
2455 /*
2456  * a GET_LEASE_TIME request
2457  */
2458 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2459                                        struct nfs4_get_lease_time_args *args)
2460 {
2461         struct xdr_stream xdr;
2462         struct compound_hdr hdr = {
2463                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2464         };
2465         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2466
2467         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2468         encode_compound_hdr(&xdr, req, &hdr);
2469         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2470         encode_putrootfh(&xdr, &hdr);
2471         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2472         encode_nops(&hdr);
2473         return 0;
2474 }
2475
2476 /*
2477  * a RECLAIM_COMPLETE request
2478  */
2479 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2480                                      struct nfs41_reclaim_complete_args *args)
2481 {
2482         struct xdr_stream xdr;
2483         struct compound_hdr hdr = {
2484                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2485         };
2486
2487         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2488         encode_compound_hdr(&xdr, req, &hdr);
2489         encode_sequence(&xdr, &args->seq_args, &hdr);
2490         encode_reclaim_complete(&xdr, args, &hdr);
2491         encode_nops(&hdr);
2492         return 0;
2493 }
2494
2495 #endif /* CONFIG_NFS_V4_1 */
2496
2497 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2498 {
2499         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2500                 "Remaining buffer length is %tu words.\n",
2501                 func, xdr->end - xdr->p);
2502 }
2503
2504 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2505 {
2506         __be32 *p;
2507
2508         p = xdr_inline_decode(xdr, 4);
2509         if (unlikely(!p))
2510                 goto out_overflow;
2511         *len = be32_to_cpup(p);
2512         p = xdr_inline_decode(xdr, *len);
2513         if (unlikely(!p))
2514                 goto out_overflow;
2515         *string = (char *)p;
2516         return 0;
2517 out_overflow:
2518         print_overflow_msg(__func__, xdr);
2519         return -EIO;
2520 }
2521
2522 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2523 {
2524         __be32 *p;
2525
2526         p = xdr_inline_decode(xdr, 8);
2527         if (unlikely(!p))
2528                 goto out_overflow;
2529         hdr->status = be32_to_cpup(p++);
2530         hdr->taglen = be32_to_cpup(p);
2531
2532         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2533         if (unlikely(!p))
2534                 goto out_overflow;
2535         hdr->tag = (char *)p;
2536         p += XDR_QUADLEN(hdr->taglen);
2537         hdr->nops = be32_to_cpup(p);
2538         if (unlikely(hdr->nops < 1))
2539                 return nfs4_stat_to_errno(hdr->status);
2540         return 0;
2541 out_overflow:
2542         print_overflow_msg(__func__, xdr);
2543         return -EIO;
2544 }
2545
2546 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2547 {
2548         __be32 *p;
2549         uint32_t opnum;
2550         int32_t nfserr;
2551
2552         p = xdr_inline_decode(xdr, 8);
2553         if (unlikely(!p))
2554                 goto out_overflow;
2555         opnum = be32_to_cpup(p++);
2556         if (opnum != expected) {
2557                 dprintk("nfs: Server returned operation"
2558                         " %d but we issued a request for %d\n",
2559                                 opnum, expected);
2560                 return -EIO;
2561         }
2562         nfserr = be32_to_cpup(p);
2563         if (nfserr != NFS_OK)
2564                 return nfs4_stat_to_errno(nfserr);
2565         return 0;
2566 out_overflow:
2567         print_overflow_msg(__func__, xdr);
2568         return -EIO;
2569 }
2570
2571 /* Dummy routine */
2572 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2573 {
2574         __be32 *p;
2575         unsigned int strlen;
2576         char *str;
2577
2578         p = xdr_inline_decode(xdr, 12);
2579         if (likely(p))
2580                 return decode_opaque_inline(xdr, &strlen, &str);
2581         print_overflow_msg(__func__, xdr);
2582         return -EIO;
2583 }
2584
2585 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2586 {
2587         uint32_t bmlen;
2588         __be32 *p;
2589
2590         p = xdr_inline_decode(xdr, 4);
2591         if (unlikely(!p))
2592                 goto out_overflow;
2593         bmlen = be32_to_cpup(p);
2594
2595         bitmap[0] = bitmap[1] = 0;
2596         p = xdr_inline_decode(xdr, (bmlen << 2));
2597         if (unlikely(!p))
2598                 goto out_overflow;
2599         if (bmlen > 0) {
2600                 bitmap[0] = be32_to_cpup(p++);
2601                 if (bmlen > 1)
2602                         bitmap[1] = be32_to_cpup(p);
2603         }
2604         return 0;
2605 out_overflow:
2606         print_overflow_msg(__func__, xdr);
2607         return -EIO;
2608 }
2609
2610 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2611 {
2612         __be32 *p;
2613
2614         p = xdr_inline_decode(xdr, 4);
2615         if (unlikely(!p))
2616                 goto out_overflow;
2617         *attrlen = be32_to_cpup(p);
2618         *savep = xdr->p;
2619         return 0;
2620 out_overflow:
2621         print_overflow_msg(__func__, xdr);
2622         return -EIO;
2623 }
2624
2625 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2626 {
2627         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2628                 decode_attr_bitmap(xdr, bitmask);
2629                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2630         } else
2631                 bitmask[0] = bitmask[1] = 0;
2632         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2633         return 0;
2634 }
2635
2636 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2637 {
2638         __be32 *p;
2639         int ret = 0;
2640
2641         *type = 0;
2642         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2643                 return -EIO;
2644         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2645                 p = xdr_inline_decode(xdr, 4);
2646                 if (unlikely(!p))
2647                         goto out_overflow;
2648                 *type = be32_to_cpup(p);
2649                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2650                         dprintk("%s: bad type %d\n", __func__, *type);
2651                         return -EIO;
2652                 }
2653                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2654                 ret = NFS_ATTR_FATTR_TYPE;
2655         }
2656         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2657         return ret;
2658 out_overflow:
2659         print_overflow_msg(__func__, xdr);
2660         return -EIO;
2661 }
2662
2663 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2664 {
2665         __be32 *p;
2666         int ret = 0;
2667
2668         *change = 0;
2669         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2670                 return -EIO;
2671         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2672                 p = xdr_inline_decode(xdr, 8);
2673                 if (unlikely(!p))
2674                         goto out_overflow;
2675                 xdr_decode_hyper(p, change);
2676                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2677                 ret = NFS_ATTR_FATTR_CHANGE;
2678         }
2679         dprintk("%s: change attribute=%Lu\n", __func__,
2680                         (unsigned long long)*change);
2681         return ret;
2682 out_overflow:
2683         print_overflow_msg(__func__, xdr);
2684         return -EIO;
2685 }
2686
2687 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2688 {
2689         __be32 *p;
2690         int ret = 0;
2691
2692         *size = 0;
2693         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2694                 return -EIO;
2695         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2696                 p = xdr_inline_decode(xdr, 8);
2697                 if (unlikely(!p))
2698                         goto out_overflow;
2699                 xdr_decode_hyper(p, size);
2700                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2701                 ret = NFS_ATTR_FATTR_SIZE;
2702         }
2703         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2704         return ret;
2705 out_overflow:
2706         print_overflow_msg(__func__, xdr);
2707         return -EIO;
2708 }
2709
2710 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2711 {
2712         __be32 *p;
2713
2714         *res = 0;
2715         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2716                 return -EIO;
2717         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2718                 p = xdr_inline_decode(xdr, 4);
2719                 if (unlikely(!p))
2720                         goto out_overflow;
2721                 *res = be32_to_cpup(p);
2722                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2723         }
2724         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2725         return 0;
2726 out_overflow:
2727         print_overflow_msg(__func__, xdr);
2728         return -EIO;
2729 }
2730
2731 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2732 {
2733         __be32 *p;
2734
2735         *res = 0;
2736         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2737                 return -EIO;
2738         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2739                 p = xdr_inline_decode(xdr, 4);
2740                 if (unlikely(!p))
2741                         goto out_overflow;
2742                 *res = be32_to_cpup(p);
2743                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2744         }
2745         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2746         return 0;
2747 out_overflow:
2748         print_overflow_msg(__func__, xdr);
2749         return -EIO;
2750 }
2751
2752 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2753 {
2754         __be32 *p;
2755         int ret = 0;
2756
2757         fsid->major = 0;
2758         fsid->minor = 0;
2759         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2760                 return -EIO;
2761         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2762                 p = xdr_inline_decode(xdr, 16);
2763                 if (unlikely(!p))
2764                         goto out_overflow;
2765                 p = xdr_decode_hyper(p, &fsid->major);
2766                 xdr_decode_hyper(p, &fsid->minor);
2767                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2768                 ret = NFS_ATTR_FATTR_FSID;
2769         }
2770         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2771                         (unsigned long long)fsid->major,
2772                         (unsigned long long)fsid->minor);
2773         return ret;
2774 out_overflow:
2775         print_overflow_msg(__func__, xdr);
2776         return -EIO;
2777 }
2778
2779 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2780 {
2781         __be32 *p;
2782
2783         *res = 60;
2784         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2785                 return -EIO;
2786         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2787                 p = xdr_inline_decode(xdr, 4);
2788                 if (unlikely(!p))
2789                         goto out_overflow;
2790                 *res = be32_to_cpup(p);
2791                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2792         }
2793         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2794         return 0;
2795 out_overflow:
2796         print_overflow_msg(__func__, xdr);
2797         return -EIO;
2798 }
2799
2800 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2801 {
2802         __be32 *p;
2803
2804         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2805         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2806                 return -EIO;
2807         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2808                 p = xdr_inline_decode(xdr, 4);
2809                 if (unlikely(!p))
2810                         goto out_overflow;
2811                 *res = be32_to_cpup(p);
2812                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2813         }
2814         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2815         return 0;
2816 out_overflow:
2817         print_overflow_msg(__func__, xdr);
2818         return -EIO;
2819 }
2820
2821 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2822 {
2823         __be32 *p;
2824         int ret = 0;
2825
2826         *fileid = 0;
2827         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2828                 return -EIO;
2829         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2830                 p = xdr_inline_decode(xdr, 8);
2831                 if (unlikely(!p))
2832                         goto out_overflow;
2833                 xdr_decode_hyper(p, fileid);
2834                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2835                 ret = NFS_ATTR_FATTR_FILEID;
2836         }
2837         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2838         return ret;
2839 out_overflow:
2840         print_overflow_msg(__func__, xdr);
2841         return -EIO;
2842 }
2843
2844 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2845 {
2846         __be32 *p;
2847         int ret = 0;
2848
2849         *fileid = 0;
2850         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2851                 return -EIO;
2852         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2853                 p = xdr_inline_decode(xdr, 8);
2854                 if (unlikely(!p))
2855                         goto out_overflow;
2856                 xdr_decode_hyper(p, fileid);
2857                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2858                 ret = NFS_ATTR_FATTR_FILEID;
2859         }
2860         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2861         return ret;
2862 out_overflow:
2863         print_overflow_msg(__func__, xdr);
2864         return -EIO;
2865 }
2866
2867 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2868 {
2869         __be32 *p;
2870         int status = 0;
2871
2872         *res = 0;
2873         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2874                 return -EIO;
2875         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2876                 p = xdr_inline_decode(xdr, 8);
2877                 if (unlikely(!p))
2878                         goto out_overflow;
2879                 xdr_decode_hyper(p, res);
2880                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2881         }
2882         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2883         return status;
2884 out_overflow:
2885         print_overflow_msg(__func__, xdr);
2886         return -EIO;
2887 }
2888
2889 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2890 {
2891         __be32 *p;
2892         int status = 0;
2893
2894         *res = 0;
2895         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2896                 return -EIO;
2897         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2898                 p = xdr_inline_decode(xdr, 8);
2899                 if (unlikely(!p))
2900                         goto out_overflow;
2901                 xdr_decode_hyper(p, res);
2902                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2903         }
2904         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2905         return status;
2906 out_overflow:
2907         print_overflow_msg(__func__, xdr);
2908         return -EIO;
2909 }
2910
2911 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2912 {
2913         __be32 *p;
2914         int status = 0;
2915
2916         *res = 0;
2917         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2918                 return -EIO;
2919         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2920                 p = xdr_inline_decode(xdr, 8);
2921                 if (unlikely(!p))
2922                         goto out_overflow;
2923                 xdr_decode_hyper(p, res);
2924                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2925         }
2926         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2927         return status;
2928 out_overflow:
2929         print_overflow_msg(__func__, xdr);
2930         return -EIO;
2931 }
2932
2933 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2934 {
2935         u32 n;
2936         __be32 *p;
2937         int status = 0;
2938
2939         p = xdr_inline_decode(xdr, 4);
2940         if (unlikely(!p))
2941                 goto out_overflow;
2942         n = be32_to_cpup(p);
2943         if (n == 0)
2944                 goto root_path;
2945         dprintk("path ");
2946         path->ncomponents = 0;
2947         while (path->ncomponents < n) {
2948                 struct nfs4_string *component = &path->components[path->ncomponents];
2949                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2950                 if (unlikely(status != 0))
2951                         goto out_eio;
2952                 if (path->ncomponents != n)
2953                         dprintk("/");
2954                 dprintk("%s", component->data);
2955                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2956                         path->ncomponents++;
2957                 else {
2958                         dprintk("cannot parse %d components in path\n", n);
2959                         goto out_eio;
2960                 }
2961         }
2962 out:
2963         dprintk("\n");
2964         return status;
2965 root_path:
2966 /* a root pathname is sent as a zero component4 */
2967         path->ncomponents = 1;
2968         path->components[0].len=0;
2969         path->components[0].data=NULL;
2970         dprintk("path /\n");
2971         goto out;
2972 out_eio:
2973         dprintk(" status %d", status);
2974         status = -EIO;
2975         goto out;
2976 out_overflow:
2977         print_overflow_msg(__func__, xdr);
2978         return -EIO;
2979 }
2980
2981 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2982 {
2983         int n;
2984         __be32 *p;
2985         int status = -EIO;
2986
2987         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2988                 goto out;
2989         status = 0;
2990         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2991                 goto out;
2992         dprintk("%s: fsroot ", __func__);
2993         status = decode_pathname(xdr, &res->fs_path);
2994         if (unlikely(status != 0))
2995                 goto out;
2996         p = xdr_inline_decode(xdr, 4);
2997         if (unlikely(!p))
2998                 goto out_overflow;
2999         n = be32_to_cpup(p);
3000         if (n <= 0)
3001                 goto out_eio;
3002         res->nlocations = 0;
3003         while (res->nlocations < n) {
3004                 u32 m;
3005                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3006
3007                 p = xdr_inline_decode(xdr, 4);
3008                 if (unlikely(!p))
3009                         goto out_overflow;
3010                 m = be32_to_cpup(p);
3011
3012                 loc->nservers = 0;
3013                 dprintk("%s: servers ", __func__);
3014                 while (loc->nservers < m) {
3015                         struct nfs4_string *server = &loc->servers[loc->nservers];
3016                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3017                         if (unlikely(status != 0))
3018                                 goto out_eio;
3019                         dprintk("%s ", server->data);
3020                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3021                                 loc->nservers++;
3022                         else {
3023                                 unsigned int i;
3024                                 dprintk("%s: using first %u of %u servers "
3025                                         "returned for location %u\n",
3026                                                 __func__,
3027                                                 NFS4_FS_LOCATION_MAXSERVERS,
3028                                                 m, res->nlocations);
3029                                 for (i = loc->nservers; i < m; i++) {
3030                                         unsigned int len;
3031                                         char *data;
3032                                         status = decode_opaque_inline(xdr, &len, &data);
3033                                         if (unlikely(status != 0))
3034                                                 goto out_eio;
3035                                 }
3036                         }
3037                 }
3038                 status = decode_pathname(xdr, &loc->rootpath);
3039                 if (unlikely(status != 0))
3040                         goto out_eio;
3041                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3042                         res->nlocations++;
3043         }
3044         if (res->nlocations != 0)
3045                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3046 out:
3047         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3048         return status;
3049 out_overflow:
3050         print_overflow_msg(__func__, xdr);
3051 out_eio:
3052         status = -EIO;
3053         goto out;
3054 }
3055
3056 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3057 {
3058         __be32 *p;
3059         int status = 0;
3060
3061         *res = 0;
3062         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3063                 return -EIO;
3064         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3065                 p = xdr_inline_decode(xdr, 8);
3066                 if (unlikely(!p))
3067                         goto out_overflow;
3068                 xdr_decode_hyper(p, res);
3069                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3070         }
3071         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3072         return status;
3073 out_overflow:
3074         print_overflow_msg(__func__, xdr);
3075         return -EIO;
3076 }
3077
3078 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3079 {
3080         __be32 *p;
3081         int status = 0;
3082
3083         *maxlink = 1;
3084         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3085                 return -EIO;
3086         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3087                 p = xdr_inline_decode(xdr, 4);
3088                 if (unlikely(!p))
3089                         goto out_overflow;
3090                 *maxlink = be32_to_cpup(p);
3091                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3092         }
3093         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3094         return status;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         return -EIO;
3098 }
3099
3100 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3101 {
3102         __be32 *p;
3103         int status = 0;
3104
3105         *maxname = 1024;
3106         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3107                 return -EIO;
3108         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3109                 p = xdr_inline_decode(xdr, 4);
3110                 if (unlikely(!p))
3111                         goto out_overflow;
3112                 *maxname = be32_to_cpup(p);
3113                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3114         }
3115         dprintk("%s: maxname=%u\n", __func__, *maxname);
3116         return status;
3117 out_overflow:
3118         print_overflow_msg(__func__, xdr);
3119         return -EIO;
3120 }
3121
3122 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3123 {
3124         __be32 *p;
3125         int status = 0;
3126
3127         *res = 1024;
3128         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3129                 return -EIO;
3130         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3131                 uint64_t maxread;
3132                 p = xdr_inline_decode(xdr, 8);
3133                 if (unlikely(!p))
3134                         goto out_overflow;
3135                 xdr_decode_hyper(p, &maxread);
3136                 if (maxread > 0x7FFFFFFF)
3137                         maxread = 0x7FFFFFFF;
3138                 *res = (uint32_t)maxread;
3139                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3140         }
3141         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3142         return status;
3143 out_overflow:
3144         print_overflow_msg(__func__, xdr);
3145         return -EIO;
3146 }
3147
3148 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3149 {
3150         __be32 *p;
3151         int status = 0;
3152
3153         *res = 1024;
3154         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3155                 return -EIO;
3156         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3157                 uint64_t maxwrite;
3158                 p = xdr_inline_decode(xdr, 8);
3159                 if (unlikely(!p))
3160                         goto out_overflow;
3161                 xdr_decode_hyper(p, &maxwrite);
3162                 if (maxwrite > 0x7FFFFFFF)
3163                         maxwrite = 0x7FFFFFFF;
3164                 *res = (uint32_t)maxwrite;
3165                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3166         }
3167         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3168         return status;
3169 out_overflow:
3170         print_overflow_msg(__func__, xdr);
3171         return -EIO;
3172 }
3173
3174 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3175 {
3176         uint32_t tmp;
3177         __be32 *p;
3178         int ret = 0;
3179
3180         *mode = 0;
3181         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3182                 return -EIO;
3183         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3184                 p = xdr_inline_decode(xdr, 4);
3185                 if (unlikely(!p))
3186                         goto out_overflow;
3187                 tmp = be32_to_cpup(p);
3188                 *mode = tmp & ~S_IFMT;
3189                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3190                 ret = NFS_ATTR_FATTR_MODE;
3191         }
3192         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3193         return ret;
3194 out_overflow:
3195         print_overflow_msg(__func__, xdr);
3196         return -EIO;
3197 }
3198
3199 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3200 {
3201         __be32 *p;
3202         int ret = 0;
3203
3204         *nlink = 1;
3205         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3206                 return -EIO;
3207         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3208                 p = xdr_inline_decode(xdr, 4);
3209                 if (unlikely(!p))
3210                         goto out_overflow;
3211                 *nlink = be32_to_cpup(p);
3212                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3213                 ret = NFS_ATTR_FATTR_NLINK;
3214         }
3215         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3216         return ret;
3217 out_overflow:
3218         print_overflow_msg(__func__, xdr);
3219         return -EIO;
3220 }
3221
3222 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3223                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3224 {
3225         uint32_t len;
3226         __be32 *p;
3227         int ret = 0;
3228
3229         *uid = -2;
3230         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3231                 return -EIO;
3232         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3233                 p = xdr_inline_decode(xdr, 4);
3234                 if (unlikely(!p))
3235                         goto out_overflow;
3236                 len = be32_to_cpup(p);
3237                 p = xdr_inline_decode(xdr, len);
3238                 if (unlikely(!p))
3239                         goto out_overflow;
3240                 if (!may_sleep) {
3241                         /* do nothing */
3242                 } else if (len < XDR_MAX_NETOBJ) {
3243                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3244                                 ret = NFS_ATTR_FATTR_OWNER;
3245                         else
3246                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3247                                                 __func__);
3248                 } else
3249                         dprintk("%s: name too long (%u)!\n",
3250                                         __func__, len);
3251                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3252         }
3253         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3254         return ret;
3255 out_overflow:
3256         print_overflow_msg(__func__, xdr);
3257         return -EIO;
3258 }
3259
3260 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3261                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3262 {
3263         uint32_t len;
3264         __be32 *p;
3265         int ret = 0;
3266
3267         *gid = -2;
3268         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3269                 return -EIO;
3270         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3271                 p = xdr_inline_decode(xdr, 4);
3272                 if (unlikely(!p))
3273                         goto out_overflow;
3274                 len = be32_to_cpup(p);
3275                 p = xdr_inline_decode(xdr, len);
3276                 if (unlikely(!p))
3277                         goto out_overflow;
3278                 if (!may_sleep) {
3279                         /* do nothing */
3280                 } else if (len < XDR_MAX_NETOBJ) {
3281                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3282                                 ret = NFS_ATTR_FATTR_GROUP;
3283                         else
3284                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3285                                                 __func__);
3286                 } else
3287                         dprintk("%s: name too long (%u)!\n",
3288                                         __func__, len);
3289                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3290         }
3291         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3292         return ret;
3293 out_overflow:
3294         print_overflow_msg(__func__, xdr);
3295         return -EIO;
3296 }
3297
3298 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3299 {
3300         uint32_t major = 0, minor = 0;
3301         __be32 *p;
3302         int ret = 0;
3303
3304         *rdev = MKDEV(0,0);
3305         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3308                 dev_t tmp;
3309
3310                 p = xdr_inline_decode(xdr, 8);
3311                 if (unlikely(!p))
3312                         goto out_overflow;
3313                 major = be32_to_cpup(p++);
3314                 minor = be32_to_cpup(p);
3315                 tmp = MKDEV(major, minor);
3316                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3317                         *rdev = tmp;
3318                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3319                 ret = NFS_ATTR_FATTR_RDEV;
3320         }
3321         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3322         return ret;
3323 out_overflow:
3324         print_overflow_msg(__func__, xdr);
3325         return -EIO;
3326 }
3327
3328 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3329 {
3330         __be32 *p;
3331         int status = 0;
3332
3333         *res = 0;
3334         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3335                 return -EIO;
3336         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3337                 p = xdr_inline_decode(xdr, 8);
3338                 if (unlikely(!p))
3339                         goto out_overflow;
3340                 xdr_decode_hyper(p, res);
3341                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3342         }
3343         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3344         return status;
3345 out_overflow:
3346         print_overflow_msg(__func__, xdr);
3347         return -EIO;
3348 }
3349
3350 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3351 {
3352         __be32 *p;
3353         int status = 0;
3354
3355         *res = 0;
3356         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3357                 return -EIO;
3358         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3359                 p = xdr_inline_decode(xdr, 8);
3360                 if (unlikely(!p))
3361                         goto out_overflow;
3362                 xdr_decode_hyper(p, res);
3363                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3364         }
3365         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3366         return status;
3367 out_overflow:
3368         print_overflow_msg(__func__, xdr);
3369         return -EIO;
3370 }
3371
3372 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3373 {
3374         __be32 *p;
3375         int status = 0;
3376
3377         *res = 0;
3378         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3379                 return -EIO;
3380         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3381                 p = xdr_inline_decode(xdr, 8);
3382                 if (unlikely(!p))
3383                         goto out_overflow;
3384                 xdr_decode_hyper(p, res);
3385                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3386         }
3387         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3388         return status;
3389 out_overflow:
3390         print_overflow_msg(__func__, xdr);
3391         return -EIO;
3392 }
3393
3394 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3395 {
3396         __be32 *p;
3397         int ret = 0;
3398
3399         *used = 0;
3400         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3401                 return -EIO;
3402         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3403                 p = xdr_inline_decode(xdr, 8);
3404                 if (unlikely(!p))
3405                         goto out_overflow;
3406                 xdr_decode_hyper(p, used);
3407                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3408                 ret = NFS_ATTR_FATTR_SPACE_USED;
3409         }
3410         dprintk("%s: space used=%Lu\n", __func__,
3411                         (unsigned long long)*used);
3412         return ret;
3413 out_overflow:
3414         print_overflow_msg(__func__, xdr);
3415         return -EIO;
3416 }
3417
3418 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3419 {
3420         __be32 *p;
3421         uint64_t sec;
3422         uint32_t nsec;
3423
3424         p = xdr_inline_decode(xdr, 12);
3425         if (unlikely(!p))
3426                 goto out_overflow;
3427         p = xdr_decode_hyper(p, &sec);
3428         nsec = be32_to_cpup(p);
3429         time->tv_sec = (time_t)sec;
3430         time->tv_nsec = (long)nsec;
3431         return 0;
3432 out_overflow:
3433         print_overflow_msg(__func__, xdr);
3434         return -EIO;
3435 }
3436
3437 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3438 {
3439         int status = 0;
3440
3441         time->tv_sec = 0;
3442         time->tv_nsec = 0;
3443         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3444                 return -EIO;
3445         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3446                 status = decode_attr_time(xdr, time);
3447                 if (status == 0)
3448                         status = NFS_ATTR_FATTR_ATIME;
3449                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3450         }
3451         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3452         return status;
3453 }
3454
3455 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3456 {
3457         int status = 0;
3458
3459         time->tv_sec = 0;
3460         time->tv_nsec = 0;
3461         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3462                 return -EIO;
3463         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3464                 status = decode_attr_time(xdr, time);
3465                 if (status == 0)
3466                         status = NFS_ATTR_FATTR_CTIME;
3467                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3468         }
3469         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3470         return status;
3471 }
3472
3473 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3474 {
3475         int status = 0;
3476
3477         time->tv_sec = 0;
3478         time->tv_nsec = 0;
3479         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3480                 return -EIO;
3481         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3482                 status = decode_attr_time(xdr, time);
3483                 if (status == 0)
3484                         status = NFS_ATTR_FATTR_MTIME;
3485                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3486         }
3487         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3488         return status;
3489 }
3490
3491 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3492 {
3493         unsigned int attrwords = XDR_QUADLEN(attrlen);
3494         unsigned int nwords = xdr->p - savep;
3495
3496         if (unlikely(attrwords != nwords)) {
3497                 dprintk("%s: server returned incorrect attribute length: "
3498                         "%u %c %u\n",
3499                                 __func__,
3500                                 attrwords << 2,
3501                                 (attrwords < nwords) ? '<' : '>',
3502                                 nwords << 2);
3503                 return -EIO;
3504         }
3505         return 0;
3506 }
3507
3508 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3509 {
3510         __be32 *p;
3511
3512         p = xdr_inline_decode(xdr, 20);
3513         if (unlikely(!p))
3514                 goto out_overflow;
3515         cinfo->atomic = be32_to_cpup(p++);
3516         p = xdr_decode_hyper(p, &cinfo->before);
3517         xdr_decode_hyper(p, &cinfo->after);
3518         return 0;
3519 out_overflow:
3520         print_overflow_msg(__func__, xdr);
3521         return -EIO;
3522 }
3523
3524 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3525 {
3526         __be32 *p;
3527         uint32_t supp, acc;
3528         int status;
3529
3530         status = decode_op_hdr(xdr, OP_ACCESS);
3531         if (status)
3532                 return status;
3533         p = xdr_inline_decode(xdr, 8);
3534         if (unlikely(!p))
3535                 goto out_overflow;
3536         supp = be32_to_cpup(p++);
3537         acc = be32_to_cpup(p);
3538         access->supported = supp;
3539         access->access = acc;
3540         return 0;
3541 out_overflow:
3542         print_overflow_msg(__func__, xdr);
3543         return -EIO;
3544 }
3545
3546 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3547 {
3548         __be32 *p;
3549
3550         p = xdr_inline_decode(xdr, len);
3551         if (likely(p)) {
3552                 memcpy(buf, p, len);
3553                 return 0;
3554         }
3555         print_overflow_msg(__func__, xdr);
3556         return -EIO;
3557 }
3558
3559 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3560 {
3561         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3562 }
3563
3564 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3565 {
3566         int status;
3567
3568         status = decode_op_hdr(xdr, OP_CLOSE);
3569         if (status != -EIO)
3570                 nfs_increment_open_seqid(status, res->seqid);
3571         if (!status)
3572                 status = decode_stateid(xdr, &res->stateid);
3573         return status;
3574 }
3575
3576 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3577 {
3578         return decode_opaque_fixed(xdr, verifier, 8);
3579 }
3580
3581 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3582 {
3583         int status;
3584
3585         status = decode_op_hdr(xdr, OP_COMMIT);
3586         if (!status)
3587                 status = decode_verifier(xdr, res->verf->verifier);
3588         return status;
3589 }
3590
3591 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3592 {
3593         __be32 *p;
3594         uint32_t bmlen;
3595         int status;
3596
3597         status = decode_op_hdr(xdr, OP_CREATE);
3598         if (status)
3599                 return status;
3600         if ((status = decode_change_info(xdr, cinfo)))
3601                 return status;
3602         p = xdr_inline_decode(xdr, 4);
3603         if (unlikely(!p))
3604                 goto out_overflow;
3605         bmlen = be32_to_cpup(p);
3606         p = xdr_inline_decode(xdr, bmlen << 2);
3607         if (likely(p))
3608                 return 0;
3609 out_overflow:
3610         print_overflow_msg(__func__, xdr);
3611         return -EIO;
3612 }
3613
3614 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3615 {
3616         __be32 *savep;
3617         uint32_t attrlen, bitmap[2] = {0};
3618         int status;
3619
3620         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3621                 goto xdr_error;
3622         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3623                 goto xdr_error;
3624         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3625                 goto xdr_error;
3626         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3627                 goto xdr_error;
3628         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3629                 goto xdr_error;
3630         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3631                 goto xdr_error;
3632         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3633                 goto xdr_error;
3634         status = verify_attr_len(xdr, savep, attrlen);
3635 xdr_error:
3636         dprintk("%s: xdr returned %d!\n", __func__, -status);
3637         return status;
3638 }
3639
3640 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3641 {
3642         __be32 *savep;
3643         uint32_t attrlen, bitmap[2] = {0};
3644         int status;
3645
3646         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3647                 goto xdr_error;
3648         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3649                 goto xdr_error;
3650         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3651                 goto xdr_error;
3652
3653         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3654                 goto xdr_error;
3655         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3656                 goto xdr_error;
3657         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3658                 goto xdr_error;
3659         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3660                 goto xdr_error;
3661         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3662                 goto xdr_error;
3663         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3664                 goto xdr_error;
3665
3666         status = verify_attr_len(xdr, savep, attrlen);
3667 xdr_error:
3668         dprintk("%s: xdr returned %d!\n", __func__, -status);
3669         return status;
3670 }
3671
3672 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3673 {
3674         __be32 *savep;
3675         uint32_t attrlen, bitmap[2] = {0};
3676         int status;
3677
3678         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3679                 goto xdr_error;
3680         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3681                 goto xdr_error;
3682         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3683                 goto xdr_error;
3684
3685         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3686                 goto xdr_error;
3687         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3688                 goto xdr_error;
3689
3690         status = verify_attr_len(xdr, savep, attrlen);
3691 xdr_error:
3692         dprintk("%s: xdr returned %d!\n", __func__, -status);
3693         return status;
3694 }
3695
3696 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3697                 const struct nfs_server *server, int may_sleep)
3698 {
3699         __be32 *savep;
3700         uint32_t attrlen,
3701                  bitmap[2] = {0},
3702                  type;
3703         int status;
3704         umode_t fmode = 0;
3705         uint64_t fileid;
3706
3707         status = decode_op_hdr(xdr, OP_GETATTR);
3708         if (status < 0)
3709                 goto xdr_error;
3710
3711         status = decode_attr_bitmap(xdr, bitmap);
3712         if (status < 0)
3713                 goto xdr_error;
3714
3715         status = decode_attr_length(xdr, &attrlen, &savep);
3716         if (status < 0)
3717                 goto xdr_error;
3718
3719
3720         status = decode_attr_type(xdr, bitmap, &type);
3721         if (status < 0)
3722                 goto xdr_error;
3723         fattr->mode = 0;
3724         if (status != 0) {
3725                 fattr->mode |= nfs_type2fmt[type];
3726                 fattr->valid |= status;
3727         }
3728
3729         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3730         if (status < 0)
3731                 goto xdr_error;
3732         fattr->valid |= status;
3733
3734         status = decode_attr_size(xdr, bitmap, &fattr->size);
3735         if (status < 0)
3736                 goto xdr_error;
3737         fattr->valid |= status;
3738
3739         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3740         if (status < 0)
3741                 goto xdr_error;
3742         fattr->valid |= status;
3743
3744         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3745         if (status < 0)
3746                 goto xdr_error;
3747         fattr->valid |= status;
3748
3749         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3750                                                 struct nfs4_fs_locations,
3751                                                 fattr));
3752         if (status < 0)
3753                 goto xdr_error;
3754         fattr->valid |= status;
3755
3756         status = decode_attr_mode(xdr, bitmap, &fmode);
3757         if (status < 0)
3758                 goto xdr_error;
3759         if (status != 0) {
3760                 fattr->mode |= fmode;
3761                 fattr->valid |= status;
3762         }
3763
3764         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3765         if (status < 0)
3766                 goto xdr_error;
3767         fattr->valid |= status;
3768
3769         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3770                         &fattr->uid, may_sleep);
3771         if (status < 0)
3772                 goto xdr_error;
3773         fattr->valid |= status;
3774
3775         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3776                         &fattr->gid, may_sleep);
3777         if (status < 0)
3778                 goto xdr_error;
3779         fattr->valid |= status;
3780
3781         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3782         if (status < 0)
3783                 goto xdr_error;
3784         fattr->valid |= status;
3785
3786         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3787         if (status < 0)
3788                 goto xdr_error;
3789         fattr->valid |= status;
3790
3791         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3792         if (status < 0)
3793                 goto xdr_error;
3794         fattr->valid |= status;
3795
3796         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3797         if (status < 0)
3798                 goto xdr_error;
3799         fattr->valid |= status;
3800
3801         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3802         if (status < 0)
3803                 goto xdr_error;
3804         fattr->valid |= status;
3805
3806         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3807         if (status < 0)
3808                 goto xdr_error;
3809         if (status != 0 && !(fattr->valid & status)) {
3810                 fattr->fileid = fileid;
3811                 fattr->valid |= status;
3812         }
3813
3814         status = verify_attr_len(xdr, savep, attrlen);
3815 xdr_error:
3816         dprintk("%s: xdr returned %d\n", __func__, -status);
3817         return status;
3818 }
3819
3820
3821 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3822 {
3823         __be32 *savep;
3824         uint32_t attrlen, bitmap[2];
3825         int status;
3826
3827         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3828                 goto xdr_error;
3829         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3830                 goto xdr_error;
3831         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3832                 goto xdr_error;
3833
3834         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3835
3836         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3837                 goto xdr_error;
3838         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3839                 goto xdr_error;
3840         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3841                 goto xdr_error;
3842         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3843         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3844                 goto xdr_error;
3845         fsinfo->wtpref = fsinfo->wtmax;
3846
3847         status = verify_attr_len(xdr, savep, attrlen);
3848 xdr_error:
3849         dprintk("%s: xdr returned %d!\n", __func__, -status);
3850         return status;
3851 }
3852
3853 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3854 {
3855         __be32 *p;
3856         uint32_t len;
3857         int status;
3858
3859         /* Zero handle first to allow comparisons */
3860         memset(fh, 0, sizeof(*fh));
3861
3862         status = decode_op_hdr(xdr, OP_GETFH);
3863         if (status)
3864                 return status;
3865
3866         p = xdr_inline_decode(xdr, 4);
3867         if (unlikely(!p))
3868                 goto out_overflow;
3869         len = be32_to_cpup(p);
3870         if (len > NFS4_FHSIZE)
3871                 return -EIO;
3872         fh->size = len;
3873         p = xdr_inline_decode(xdr, len);
3874         if (unlikely(!p))
3875                 goto out_overflow;
3876         memcpy(fh->data, p, len);
3877         return 0;
3878 out_overflow:
3879         print_overflow_msg(__func__, xdr);
3880         return -EIO;
3881 }
3882
3883 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3884 {
3885         int status;
3886
3887         status = decode_op_hdr(xdr, OP_LINK);
3888         if (status)
3889                 return status;
3890         return decode_change_info(xdr, cinfo);
3891 }
3892
3893 /*
3894  * We create the owner, so we know a proper owner.id length is 4.
3895  */
3896 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3897 {
3898         uint64_t offset, length, clientid;
3899         __be32 *p;
3900         uint32_t namelen, type;
3901
3902         p = xdr_inline_decode(xdr, 32);
3903         if (unlikely(!p))
3904                 goto out_overflow;
3905         p = xdr_decode_hyper(p, &offset);
3906         p = xdr_decode_hyper(p, &length);
3907         type = be32_to_cpup(p++);
3908         if (fl != NULL) {
3909                 fl->fl_start = (loff_t)offset;
3910                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3911                 if (length == ~(uint64_t)0)
3912                         fl->fl_end = OFFSET_MAX;
3913                 fl->fl_type = F_WRLCK;
3914                 if (type & 1)
3915                         fl->fl_type = F_RDLCK;
3916                 fl->fl_pid = 0;
3917         }
3918         p = xdr_decode_hyper(p, &clientid);
3919         namelen = be32_to_cpup(p);
3920         p = xdr_inline_decode(xdr, namelen);
3921         if (likely(p))
3922                 return -NFS4ERR_DENIED;
3923 out_overflow:
3924         print_overflow_msg(__func__, xdr);
3925         return -EIO;
3926 }
3927
3928 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3929 {
3930         int status;
3931
3932         status = decode_op_hdr(xdr, OP_LOCK);
3933         if (status == -EIO)
3934                 goto out;
3935         if (status == 0) {
3936                 status = decode_stateid(xdr, &res->stateid);
3937                 if (unlikely(status))
3938                         goto out;
3939         } else if (status == -NFS4ERR_DENIED)
3940                 status = decode_lock_denied(xdr, NULL);
3941         if (res->open_seqid != NULL)
3942                 nfs_increment_open_seqid(status, res->open_seqid);
3943         nfs_increment_lock_seqid(status, res->lock_seqid);
3944 out:
3945         return status;
3946 }
3947
3948 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3949 {
3950         int status;
3951         status = decode_op_hdr(xdr, OP_LOCKT);
3952         if (status == -NFS4ERR_DENIED)
3953                 return decode_lock_denied(xdr, res->denied);
3954         return status;
3955 }
3956
3957 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3958 {
3959         int status;
3960
3961         status = decode_op_hdr(xdr, OP_LOCKU);
3962         if (status != -EIO)
3963                 nfs_increment_lock_seqid(status, res->seqid);
3964         if (status == 0)
3965                 status = decode_stateid(xdr, &res->stateid);
3966         return status;
3967 }
3968
3969 static int decode_lookup(struct xdr_stream *xdr)
3970 {
3971         return decode_op_hdr(xdr, OP_LOOKUP);
3972 }
3973
3974 /* This is too sick! */
3975 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3976 {
3977         __be32 *p;
3978         uint32_t limit_type, nblocks, blocksize;
3979
3980         p = xdr_inline_decode(xdr, 12);
3981         if (unlikely(!p))
3982                 goto out_overflow;
3983         limit_type = be32_to_cpup(p++);
3984         switch (limit_type) {
3985         case 1:
3986                 xdr_decode_hyper(p, maxsize);
3987                 break;
3988         case 2:
3989                 nblocks = be32_to_cpup(p++);
3990                 blocksize = be32_to_cpup(p);
3991                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3992         }
3993         return 0;
3994 out_overflow:
3995         print_overflow_msg(__func__, xdr);
3996         return -EIO;
3997 }
3998
3999 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4000 {
4001         __be32 *p;
4002         uint32_t delegation_type;
4003         int status;
4004
4005         p = xdr_inline_decode(xdr, 4);
4006         if (unlikely(!p))
4007                 goto out_overflow;
4008         delegation_type = be32_to_cpup(p);
4009         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4010                 res->delegation_type = 0;
4011                 return 0;
4012         }
4013         status = decode_stateid(xdr, &res->delegation);
4014         if (unlikely(status))
4015                 return status;
4016         p = xdr_inline_decode(xdr, 4);
4017         if (unlikely(!p))
4018                 goto out_overflow;
4019         res->do_recall = be32_to_cpup(p);
4020
4021         switch (delegation_type) {
4022         case NFS4_OPEN_DELEGATE_READ:
4023                 res->delegation_type = FMODE_READ;
4024                 break;
4025         case NFS4_OPEN_DELEGATE_WRITE:
4026                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4027                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4028                                 return -EIO;
4029         }
4030         return decode_ace(xdr, NULL, res->server->nfs_client);
4031 out_overflow:
4032         print_overflow_msg(__func__, xdr);
4033         return -EIO;
4034 }
4035
4036 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4037 {
4038         __be32 *p;
4039         uint32_t savewords, bmlen, i;
4040         int status;
4041
4042         status = decode_op_hdr(xdr, OP_OPEN);
4043         if (status != -EIO)
4044                 nfs_increment_open_seqid(status, res->seqid);
4045         if (!status)
4046                 status = decode_stateid(xdr, &res->stateid);
4047         if (unlikely(status))
4048                 return status;
4049
4050         decode_change_info(xdr, &res->cinfo);
4051
4052         p = xdr_inline_decode(xdr, 8);
4053         if (unlikely(!p))
4054                 goto out_overflow;
4055         res->rflags = be32_to_cpup(p++);
4056         bmlen = be32_to_cpup(p);
4057         if (bmlen > 10)
4058                 goto xdr_error;
4059
4060         p = xdr_inline_decode(xdr, bmlen << 2);
4061         if (unlikely(!p))
4062                 goto out_overflow;
4063         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4064         for (i = 0; i < savewords; ++i)
4065                 res->attrset[i] = be32_to_cpup(p++);
4066         for (; i < NFS4_BITMAP_SIZE; i++)
4067                 res->attrset[i] = 0;
4068
4069         return decode_delegation(xdr, res);
4070 xdr_error:
4071         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4072         return -EIO;
4073 out_overflow:
4074         print_overflow_msg(__func__, xdr);
4075         return -EIO;
4076 }
4077
4078 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4079 {
4080         int status;
4081
4082         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4083         if (status != -EIO)
4084                 nfs_increment_open_seqid(status, res->seqid);
4085         if (!status)
4086                 status = decode_stateid(xdr, &res->stateid);
4087         return status;
4088 }
4089
4090 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4091 {
4092         int status;
4093
4094         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4095         if (status != -EIO)
4096                 nfs_increment_open_seqid(status, res->seqid);
4097         if (!status)
4098                 status = decode_stateid(xdr, &res->stateid);
4099         return status;
4100 }
4101
4102 static int decode_putfh(struct xdr_stream *xdr)
4103 {
4104         return decode_op_hdr(xdr, OP_PUTFH);
4105 }
4106
4107 static int decode_putrootfh(struct xdr_stream *xdr)
4108 {
4109         return decode_op_hdr(xdr, OP_PUTROOTFH);
4110 }
4111
4112 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4113 {
4114         struct kvec *iov = req->rq_rcv_buf.head;
4115         __be32 *p;
4116         uint32_t count, eof, recvd, hdrlen;
4117         int status;
4118
4119         status = decode_op_hdr(xdr, OP_READ);
4120         if (status)
4121                 return status;
4122         p = xdr_inline_decode(xdr, 8);
4123         if (unlikely(!p))
4124                 goto out_overflow;
4125         eof = be32_to_cpup(p++);
4126         count = be32_to_cpup(p);
4127         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4128         recvd = req->rq_rcv_buf.len - hdrlen;
4129         if (count > recvd) {
4130                 dprintk("NFS: server cheating in read reply: "
4131                                 "count %u > recvd %u\n", count, recvd);
4132                 count = recvd;
4133                 eof = 0;
4134         }
4135         xdr_read_pages(xdr, count);
4136         res->eof = eof;
4137         res->count = count;
4138         return 0;
4139 out_overflow:
4140         print_overflow_msg(__func__, xdr);
4141         return -EIO;
4142 }
4143
4144 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4145 {
4146         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4147         struct page     *page = *rcvbuf->pages;
4148         struct kvec     *iov = rcvbuf->head;
4149         size_t          hdrlen;
4150         u32             recvd, pglen = rcvbuf->page_len;
4151         __be32          *end, *entry, *p, *kaddr;
4152         unsigned int    nr = 0;
4153         int             status;
4154
4155         status = decode_op_hdr(xdr, OP_READDIR);
4156         if (!status)
4157                 status = decode_verifier(xdr, readdir->verifier.data);
4158         if (unlikely(status))
4159                 return status;
4160         dprintk("%s: verifier = %08x:%08x\n",
4161                         __func__,
4162                         ((u32 *)readdir->verifier.data)[0],
4163                         ((u32 *)readdir->verifier.data)[1]);
4164
4165
4166         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4167         recvd = rcvbuf->len - hdrlen;
4168         if (pglen > recvd)
4169                 pglen = recvd;
4170         xdr_read_pages(xdr, pglen);
4171
4172         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4173         kaddr = p = kmap_atomic(page, KM_USER0);
4174         end = p + ((pglen + readdir->pgbase) >> 2);
4175         entry = p;
4176
4177         /* Make sure the packet actually has a value_follows and EOF entry */
4178         if ((entry + 1) > end)
4179                 goto short_pkt;
4180
4181         for (; *p++; nr++) {
4182                 u32 len, attrlen, xlen;
4183                 if (end - p < 3)
4184                         goto short_pkt;
4185                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4186                 p += 2;                 /* cookie */
4187                 len = ntohl(*p++);      /* filename length */
4188                 if (len > NFS4_MAXNAMLEN) {
4189                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4190                                         len);
4191                         goto err_unmap;
4192                 }
4193                 xlen = XDR_QUADLEN(len);
4194                 if (end - p < xlen + 1)
4195                         goto short_pkt;
4196                 dprintk("filename = %*s\n", len, (char *)p);
4197                 p += xlen;
4198                 len = ntohl(*p++);      /* bitmap length */
4199                 if (end - p < len + 1)
4200                         goto short_pkt;
4201                 p += len;
4202                 attrlen = XDR_QUADLEN(ntohl(*p++));
4203                 if (end - p < attrlen + 2)
4204                         goto short_pkt;
4205                 p += attrlen;           /* attributes */
4206                 entry = p;
4207         }
4208         /*
4209          * Apparently some server sends responses that are a valid size, but
4210          * contain no entries, and have value_follows==0 and EOF==0. For
4211          * those, just set the EOF marker.
4212          */
4213         if (!nr && entry[1] == 0) {
4214                 dprintk("NFS: readdir reply truncated!\n");
4215                 entry[1] = 1;
4216         }
4217 out:
4218         kunmap_atomic(kaddr, KM_USER0);
4219         return 0;
4220 short_pkt:
4221         /*
4222          * When we get a short packet there are 2 possibilities. We can
4223          * return an error, or fix up the response to look like a valid
4224          * response and return what we have so far. If there are no
4225          * entries and the packet was short, then return -EIO. If there
4226          * are valid entries in the response, return them and pretend that
4227          * the call was successful, but incomplete. The caller can retry the
4228          * readdir starting at the last cookie.
4229          */
4230         dprintk("%s: short packet at entry %d\n", __func__, nr);
4231         entry[0] = entry[1] = 0;
4232         if (nr)
4233                 goto out;
4234 err_unmap:
4235         kunmap_atomic(kaddr, KM_USER0);
4236         return -errno_NFSERR_IO;
4237 }
4238
4239 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4240 {
4241         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4242         struct kvec *iov = rcvbuf->head;
4243         size_t hdrlen;
4244         u32 len, recvd;
4245         __be32 *p;
4246         char *kaddr;
4247         int status;
4248
4249         status = decode_op_hdr(xdr, OP_READLINK);
4250         if (status)
4251                 return status;
4252
4253         /* Convert length of symlink */
4254         p = xdr_inline_decode(xdr, 4);
4255         if (unlikely(!p))
4256                 goto out_overflow;
4257         len = be32_to_cpup(p);
4258         if (len >= rcvbuf->page_len || len <= 0) {
4259                 dprintk("nfs: server returned giant symlink!\n");
4260                 return -ENAMETOOLONG;
4261         }
4262         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4263         recvd = req->rq_rcv_buf.len - hdrlen;
4264         if (recvd < len) {
4265                 dprintk("NFS: server cheating in readlink reply: "
4266                                 "count %u > recvd %u\n", len, recvd);
4267                 return -EIO;
4268         }
4269         xdr_read_pages(xdr, len);
4270         /*
4271          * The XDR encode routine has set things up so that
4272          * the link text will be copied directly into the
4273          * buffer.  We just have to do overflow-checking,
4274          * and and null-terminate the text (the VFS expects
4275          * null-termination).
4276          */
4277         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4278         kaddr[len+rcvbuf->page_base] = '\0';
4279         kunmap_atomic(kaddr, KM_USER0);
4280         return 0;
4281 out_overflow:
4282         print_overflow_msg(__func__, xdr);
4283         return -EIO;
4284 }
4285
4286 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4287 {
4288         int status;
4289
4290         status = decode_op_hdr(xdr, OP_REMOVE);
4291         if (status)
4292                 goto out;
4293         status = decode_change_info(xdr, cinfo);
4294 out:
4295         return status;
4296 }
4297
4298 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4299               struct nfs4_change_info *new_cinfo)
4300 {
4301         int status;
4302
4303         status = decode_op_hdr(xdr, OP_RENAME);
4304         if (status)
4305                 goto out;
4306         if ((status = decode_change_info(xdr, old_cinfo)))
4307                 goto out;
4308         status = decode_change_info(xdr, new_cinfo);
4309 out:
4310         return status;
4311 }
4312
4313 static int decode_renew(struct xdr_stream *xdr)
4314 {
4315         return decode_op_hdr(xdr, OP_RENEW);
4316 }
4317
4318 static int
4319 decode_restorefh(struct xdr_stream *xdr)
4320 {
4321         return decode_op_hdr(xdr, OP_RESTOREFH);
4322 }
4323
4324 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4325                 size_t *acl_len)
4326 {
4327         __be32 *savep;
4328         uint32_t attrlen,
4329                  bitmap[2] = {0};
4330         struct kvec *iov = req->rq_rcv_buf.head;
4331         int status;
4332
4333         *acl_len = 0;
4334         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4335                 goto out;
4336         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4337                 goto out;
4338         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4339                 goto out;
4340
4341         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4342                 return -EIO;
4343         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4344                 size_t hdrlen;
4345                 u32 recvd;
4346
4347                 /* We ignore &savep and don't do consistency checks on
4348                  * the attr length.  Let userspace figure it out.... */
4349                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4350                 recvd = req->rq_rcv_buf.len - hdrlen;
4351                 if (attrlen > recvd) {
4352                         dprintk("NFS: server cheating in getattr"
4353                                         " acl reply: attrlen %u > recvd %u\n",
4354                                         attrlen, recvd);
4355                         return -EINVAL;
4356                 }
4357                 xdr_read_pages(xdr, attrlen);
4358                 *acl_len = attrlen;
4359         } else
4360                 status = -EOPNOTSUPP;
4361
4362 out:
4363         return status;
4364 }
4365
4366 static int
4367 decode_savefh(struct xdr_stream *xdr)
4368 {
4369         return decode_op_hdr(xdr, OP_SAVEFH);
4370 }
4371
4372 static int decode_setattr(struct xdr_stream *xdr)
4373 {
4374         __be32 *p;
4375         uint32_t bmlen;
4376         int status;
4377
4378         status = decode_op_hdr(xdr, OP_SETATTR);
4379         if (status)
4380                 return status;
4381         p = xdr_inline_decode(xdr, 4);
4382         if (unlikely(!p))
4383                 goto out_overflow;
4384         bmlen = be32_to_cpup(p);
4385         p = xdr_inline_decode(xdr, bmlen << 2);
4386         if (likely(p))
4387                 return 0;
4388 out_overflow:
4389         print_overflow_msg(__func__, xdr);
4390         return -EIO;
4391 }
4392
4393 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4394 {
4395         __be32 *p;
4396         uint32_t opnum;
4397         int32_t nfserr;
4398
4399         p = xdr_inline_decode(xdr, 8);
4400         if (unlikely(!p))
4401                 goto out_overflow;
4402         opnum = be32_to_cpup(p++);
4403         if (opnum != OP_SETCLIENTID) {
4404                 dprintk("nfs: decode_setclientid: Server returned operation"
4405                         " %d\n", opnum);
4406                 return -EIO;
4407         }
4408         nfserr = be32_to_cpup(p);
4409         if (nfserr == NFS_OK) {
4410                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4411                 if (unlikely(!p))
4412                         goto out_overflow;
4413                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4414                 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4415         } else if (nfserr == NFSERR_CLID_INUSE) {
4416                 uint32_t len;
4417
4418                 /* skip netid string */
4419                 p = xdr_inline_decode(xdr, 4);
4420                 if (unlikely(!p))
4421                         goto out_overflow;
4422                 len = be32_to_cpup(p);
4423                 p = xdr_inline_decode(xdr, len);
4424                 if (unlikely(!p))
4425                         goto out_overflow;
4426
4427                 /* skip uaddr string */
4428                 p = xdr_inline_decode(xdr, 4);
4429                 if (unlikely(!p))
4430                         goto out_overflow;
4431                 len = be32_to_cpup(p);
4432                 p = xdr_inline_decode(xdr, len);
4433                 if (unlikely(!p))
4434                         goto out_overflow;
4435                 return -NFSERR_CLID_INUSE;
4436         } else
4437                 return nfs4_stat_to_errno(nfserr);
4438
4439         return 0;
4440 out_overflow:
4441         print_overflow_msg(__func__, xdr);
4442         return -EIO;
4443 }
4444
4445 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4446 {
4447         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4448 }
4449
4450 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4451 {
4452         __be32 *p;
4453         int status;
4454
4455         status = decode_op_hdr(xdr, OP_WRITE);
4456         if (status)
4457                 return status;
4458
4459         p = xdr_inline_decode(xdr, 16);
4460         if (unlikely(!p))
4461                 goto out_overflow;
4462         res->count = be32_to_cpup(p++);
4463         res->verf->committed = be32_to_cpup(p++);
4464         memcpy(res->verf->verifier, p, 8);
4465         return 0;
4466 out_overflow:
4467         print_overflow_msg(__func__, xdr);
4468         return -EIO;
4469 }
4470
4471 static int decode_delegreturn(struct xdr_stream *xdr)
4472 {
4473         return decode_op_hdr(xdr, OP_DELEGRETURN);
4474 }
4475
4476 #if defined(CONFIG_NFS_V4_1)
4477 static int decode_exchange_id(struct xdr_stream *xdr,
4478                               struct nfs41_exchange_id_res *res)
4479 {
4480         __be32 *p;
4481         uint32_t dummy;
4482         char *dummy_str;
4483         int status;
4484         struct nfs_client *clp = res->client;
4485
4486         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4487         if (status)
4488                 return status;
4489
4490         p = xdr_inline_decode(xdr, 8);
4491         if (unlikely(!p))
4492                 goto out_overflow;
4493         xdr_decode_hyper(p, &clp->cl_ex_clid);
4494         p = xdr_inline_decode(xdr, 12);
4495         if (unlikely(!p))
4496                 goto out_overflow;
4497         clp->cl_seqid = be32_to_cpup(p++);
4498         clp->cl_exchange_flags = be32_to_cpup(p++);
4499
4500         /* We ask for SP4_NONE */
4501         dummy = be32_to_cpup(p);
4502         if (dummy != SP4_NONE)
4503                 return -EIO;
4504
4505         /* Throw away minor_id */
4506         p = xdr_inline_decode(xdr, 8);
4507         if (unlikely(!p))
4508                 goto out_overflow;
4509
4510         /* Throw away Major id */
4511         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4512         if (unlikely(status))
4513                 return status;
4514
4515         /* Throw away server_scope */
4516         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4517         if (unlikely(status))
4518                 return status;
4519
4520         /* Throw away Implementation id array */
4521         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4522         if (unlikely(status))
4523                 return status;
4524
4525         return 0;
4526 out_overflow:
4527         print_overflow_msg(__func__, xdr);
4528         return -EIO;
4529 }
4530
4531 static int decode_chan_attrs(struct xdr_stream *xdr,
4532                              struct nfs4_channel_attrs *attrs)
4533 {
4534         __be32 *p;
4535         u32 nr_attrs;
4536
4537         p = xdr_inline_decode(xdr, 28);
4538         if (unlikely(!p))
4539                 goto out_overflow;
4540         attrs->headerpadsz = be32_to_cpup(p++);
4541         attrs->max_rqst_sz = be32_to_cpup(p++);
4542         attrs->max_resp_sz = be32_to_cpup(p++);
4543         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4544         attrs->max_ops = be32_to_cpup(p++);
4545         attrs->max_reqs = be32_to_cpup(p++);
4546         nr_attrs = be32_to_cpup(p);
4547         if (unlikely(nr_attrs > 1)) {
4548                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4549                         __func__, nr_attrs);
4550                 return -EINVAL;
4551         }
4552         if (nr_attrs == 1) {
4553                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4554                 if (unlikely(!p))
4555                         goto out_overflow;
4556         }
4557         return 0;
4558 out_overflow:
4559         print_overflow_msg(__func__, xdr);
4560         return -EIO;
4561 }
4562
4563 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4564 {
4565         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4566 }
4567
4568 static int decode_create_session(struct xdr_stream *xdr,
4569                                  struct nfs41_create_session_res *res)
4570 {
4571         __be32 *p;
4572         int status;
4573         struct nfs_client *clp = res->client;
4574         struct nfs4_session *session = clp->cl_session;
4575
4576         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4577         if (!status)
4578                 status = decode_sessionid(xdr, &session->sess_id);
4579         if (unlikely(status))
4580                 return status;
4581
4582         /* seqid, flags */
4583         p = xdr_inline_decode(xdr, 8);
4584         if (unlikely(!p))
4585                 goto out_overflow;
4586         clp->cl_seqid = be32_to_cpup(p++);
4587         session->flags = be32_to_cpup(p);
4588
4589         /* Channel attributes */
4590         status = decode_chan_attrs(xdr, &session->fc_attrs);
4591         if (!status)
4592                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4593         return status;
4594 out_overflow:
4595         print_overflow_msg(__func__, xdr);
4596         return -EIO;
4597 }
4598
4599 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4600 {
4601         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4602 }
4603
4604 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4605 {
4606         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4607 }
4608 #endif /* CONFIG_NFS_V4_1 */
4609
4610 static int decode_sequence(struct xdr_stream *xdr,
4611                            struct nfs4_sequence_res *res,
4612                            struct rpc_rqst *rqstp)
4613 {
4614 #if defined(CONFIG_NFS_V4_1)
4615         struct nfs4_slot *slot;
4616         struct nfs4_sessionid id;
4617         u32 dummy;
4618         int status;
4619         __be32 *p;
4620
4621         if (!res->sr_session)
4622                 return 0;
4623
4624         status = decode_op_hdr(xdr, OP_SEQUENCE);
4625         if (!status)
4626                 status = decode_sessionid(xdr, &id);
4627         if (unlikely(status))
4628                 goto out_err;
4629
4630         /*
4631          * If the server returns different values for sessionID, slotID or
4632          * sequence number, the server is looney tunes.
4633          */
4634         status = -ESERVERFAULT;
4635
4636         if (memcmp(id.data, res->sr_session->sess_id.data,
4637                    NFS4_MAX_SESSIONID_LEN)) {
4638                 dprintk("%s Invalid session id\n", __func__);
4639                 goto out_err;
4640         }
4641
4642         p = xdr_inline_decode(xdr, 20);
4643         if (unlikely(!p))
4644                 goto out_overflow;
4645
4646         /* seqid */
4647         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4648         dummy = be32_to_cpup(p++);
4649         if (dummy != slot->seq_nr) {
4650                 dprintk("%s Invalid sequence number\n", __func__);
4651                 goto out_err;
4652         }
4653         /* slot id */
4654         dummy = be32_to_cpup(p++);
4655         if (dummy != res->sr_slotid) {
4656                 dprintk("%s Invalid slot id\n", __func__);
4657                 goto out_err;
4658         }
4659         /* highest slot id - currently not processed */
4660         dummy = be32_to_cpup(p++);
4661         /* target highest slot id - currently not processed */
4662         dummy = be32_to_cpup(p++);
4663         /* result flags */
4664         res->sr_status_flags = be32_to_cpup(p);
4665         status = 0;
4666 out_err:
4667         res->sr_status = status;
4668         return status;
4669 out_overflow:
4670         print_overflow_msg(__func__, xdr);
4671         status = -EIO;
4672         goto out_err;
4673 #else  /* CONFIG_NFS_V4_1 */
4674         return 0;
4675 #endif /* CONFIG_NFS_V4_1 */
4676 }
4677
4678 /*
4679  * END OF "GENERIC" DECODE ROUTINES.
4680  */
4681
4682 /*
4683  * Decode OPEN_DOWNGRADE response
4684  */
4685 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4686 {
4687         struct xdr_stream xdr;
4688         struct compound_hdr hdr;
4689         int status;
4690
4691         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4692         status = decode_compound_hdr(&xdr, &hdr);
4693         if (status)
4694                 goto out;
4695         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4696         if (status)
4697                 goto out;
4698         status = decode_putfh(&xdr);
4699         if (status)
4700                 goto out;
4701         status = decode_open_downgrade(&xdr, res);
4702         if (status != 0)
4703                 goto out;
4704         decode_getfattr(&xdr, res->fattr, res->server,
4705                         !RPC_IS_ASYNC(rqstp->rq_task));
4706 out:
4707         return status;
4708 }
4709
4710 /*
4711  * Decode ACCESS response
4712  */
4713 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4714 {
4715         struct xdr_stream xdr;
4716         struct compound_hdr hdr;
4717         int status;
4718
4719         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4720         status = decode_compound_hdr(&xdr, &hdr);
4721         if (status)
4722                 goto out;
4723         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4724         if (status)
4725                 goto out;
4726         status = decode_putfh(&xdr);
4727         if (status != 0)
4728                 goto out;
4729         status = decode_access(&xdr, res);
4730         if (status != 0)
4731                 goto out;
4732         decode_getfattr(&xdr, res->fattr, res->server,
4733                         !RPC_IS_ASYNC(rqstp->rq_task));
4734 out:
4735         return status;
4736 }
4737
4738 /*
4739  * Decode LOOKUP response
4740  */
4741 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4742 {
4743         struct xdr_stream xdr;
4744         struct compound_hdr hdr;
4745         int status;
4746
4747         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4748         status = decode_compound_hdr(&xdr, &hdr);
4749         if (status)
4750                 goto out;
4751         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4752         if (status)
4753                 goto out;
4754         if ((status = decode_putfh(&xdr)) != 0)
4755                 goto out;
4756         if ((status = decode_lookup(&xdr)) != 0)
4757                 goto out;
4758         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4759                 goto out;
4760         status = decode_getfattr(&xdr, res->fattr, res->server
4761                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4762 out:
4763         return status;
4764 }
4765
4766 /*
4767  * Decode LOOKUP_ROOT response
4768  */
4769 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4770 {
4771         struct xdr_stream xdr;
4772         struct compound_hdr hdr;
4773         int status;
4774
4775         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4776         status = decode_compound_hdr(&xdr, &hdr);
4777         if (status)
4778                 goto out;
4779         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4780         if (status)
4781                 goto out;
4782         if ((status = decode_putrootfh(&xdr)) != 0)
4783                 goto out;
4784         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4785                 status = decode_getfattr(&xdr, res->fattr, res->server,
4786                                 !RPC_IS_ASYNC(rqstp->rq_task));
4787 out:
4788         return status;
4789 }
4790
4791 /*
4792  * Decode REMOVE response
4793  */
4794 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4795 {
4796         struct xdr_stream xdr;
4797         struct compound_hdr hdr;
4798         int status;
4799
4800         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4801         status = decode_compound_hdr(&xdr, &hdr);
4802         if (status)
4803                 goto out;
4804         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4805         if (status)
4806                 goto out;
4807         if ((status = decode_putfh(&xdr)) != 0)
4808                 goto out;
4809         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4810                 goto out;
4811         decode_getfattr(&xdr, &res->dir_attr, res->server,
4812                         !RPC_IS_ASYNC(rqstp->rq_task));
4813 out:
4814         return status;
4815 }
4816
4817 /*
4818  * Decode RENAME response
4819  */
4820 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4821 {
4822         struct xdr_stream xdr;
4823         struct compound_hdr hdr;
4824         int status;
4825
4826         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4827         status = decode_compound_hdr(&xdr, &hdr);
4828         if (status)
4829                 goto out;
4830         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4831         if (status)
4832                 goto out;
4833         if ((status = decode_putfh(&xdr)) != 0)
4834                 goto out;
4835         if ((status = decode_savefh(&xdr)) != 0)
4836                 goto out;
4837         if ((status = decode_putfh(&xdr)) != 0)
4838                 goto out;
4839         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4840                 goto out;
4841         /* Current FH is target directory */
4842         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4843                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4844                 goto out;
4845         if ((status = decode_restorefh(&xdr)) != 0)
4846                 goto out;
4847         decode_getfattr(&xdr, res->old_fattr, res->server,
4848                         !RPC_IS_ASYNC(rqstp->rq_task));
4849 out:
4850         return status;
4851 }
4852
4853 /*
4854  * Decode LINK response
4855  */
4856 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4857 {
4858         struct xdr_stream xdr;
4859         struct compound_hdr hdr;
4860         int status;
4861
4862         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4863         status = decode_compound_hdr(&xdr, &hdr);
4864         if (status)
4865                 goto out;
4866         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4867         if (status)
4868                 goto out;
4869         if ((status = decode_putfh(&xdr)) != 0)
4870                 goto out;
4871         if ((status = decode_savefh(&xdr)) != 0)
4872                 goto out;
4873         if ((status = decode_putfh(&xdr)) != 0)
4874                 goto out;
4875         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4876                 goto out;
4877         /*
4878          * Note order: OP_LINK leaves the directory as the current
4879          *             filehandle.
4880          */
4881         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4882                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4883                 goto out;
4884         if ((status = decode_restorefh(&xdr)) != 0)
4885                 goto out;
4886         decode_getfattr(&xdr, res->fattr, res->server,
4887                         !RPC_IS_ASYNC(rqstp->rq_task));
4888 out:
4889         return status;
4890 }
4891
4892 /*
4893  * Decode CREATE response
4894  */
4895 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4896 {
4897         struct xdr_stream xdr;
4898         struct compound_hdr hdr;
4899         int status;
4900
4901         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4902         status = decode_compound_hdr(&xdr, &hdr);
4903         if (status)
4904                 goto out;
4905         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4906         if (status)
4907                 goto out;
4908         if ((status = decode_putfh(&xdr)) != 0)
4909                 goto out;
4910         if ((status = decode_savefh(&xdr)) != 0)
4911                 goto out;
4912         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4913                 goto out;
4914         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4915                 goto out;
4916         if (decode_getfattr(&xdr, res->fattr, res->server,
4917                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4918                 goto out;
4919         if ((status = decode_restorefh(&xdr)) != 0)
4920                 goto out;
4921         decode_getfattr(&xdr, res->dir_fattr, res->server,
4922                         !RPC_IS_ASYNC(rqstp->rq_task));
4923 out:
4924         return status;
4925 }
4926
4927 /*
4928  * Decode SYMLINK response
4929  */
4930 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4931 {
4932         return nfs4_xdr_dec_create(rqstp, p, res);
4933 }
4934
4935 /*
4936  * Decode GETATTR response
4937  */
4938 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4939 {
4940         struct xdr_stream xdr;
4941         struct compound_hdr hdr;
4942         int status;
4943
4944         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4945         status = decode_compound_hdr(&xdr, &hdr);
4946         if (status)
4947                 goto out;
4948         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4949         if (status)
4950                 goto out;
4951         status = decode_putfh(&xdr);
4952         if (status)
4953                 goto out;
4954         status = decode_getfattr(&xdr, res->fattr, res->server,
4955                         !RPC_IS_ASYNC(rqstp->rq_task));
4956 out:
4957         return status;
4958 }
4959
4960 /*
4961  * Encode an SETACL request
4962  */
4963 static int
4964 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4965 {
4966         struct xdr_stream xdr;
4967         struct compound_hdr hdr = {
4968                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4969         };
4970         int status;
4971
4972         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4973         encode_compound_hdr(&xdr, req, &hdr);
4974         encode_sequence(&xdr, &args->seq_args, &hdr);
4975         encode_putfh(&xdr, args->fh, &hdr);
4976         status = encode_setacl(&xdr, args, &hdr);
4977         encode_nops(&hdr);
4978         return status;
4979 }
4980
4981 /*
4982  * Decode SETACL response
4983  */
4984 static int
4985 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4986                     struct nfs_setaclres *res)
4987 {
4988         struct xdr_stream xdr;
4989         struct compound_hdr hdr;
4990         int status;
4991
4992         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4993         status = decode_compound_hdr(&xdr, &hdr);
4994         if (status)
4995                 goto out;
4996         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4997         if (status)
4998                 goto out;
4999         status = decode_putfh(&xdr);
5000         if (status)
5001                 goto out;
5002         status = decode_setattr(&xdr);
5003 out:
5004         return status;
5005 }
5006
5007 /*
5008  * Decode GETACL response
5009  */
5010 static int
5011 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5012                     struct nfs_getaclres *res)
5013 {
5014         struct xdr_stream xdr;
5015         struct compound_hdr hdr;
5016         int status;
5017
5018         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5019         status = decode_compound_hdr(&xdr, &hdr);
5020         if (status)
5021                 goto out;
5022         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5023         if (status)
5024                 goto out;
5025         status = decode_putfh(&xdr);
5026         if (status)
5027                 goto out;
5028         status = decode_getacl(&xdr, rqstp, &res->acl_len);
5029
5030 out:
5031         return status;
5032 }
5033
5034 /*
5035  * Decode CLOSE response
5036  */
5037 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5038 {
5039         struct xdr_stream xdr;
5040         struct compound_hdr hdr;
5041         int status;
5042
5043         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5044         status = decode_compound_hdr(&xdr, &hdr);
5045         if (status)
5046                 goto out;
5047         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5048         if (status)
5049                 goto out;
5050         status = decode_putfh(&xdr);
5051         if (status)
5052                 goto out;
5053         status = decode_close(&xdr, res);
5054         if (status != 0)
5055                 goto out;
5056         /*
5057          * Note: Server may do delete on close for this file
5058          *      in which case the getattr call will fail with
5059          *      an ESTALE error. Shouldn't be a problem,
5060          *      though, since fattr->valid will remain unset.
5061          */
5062         decode_getfattr(&xdr, res->fattr, res->server,
5063                         !RPC_IS_ASYNC(rqstp->rq_task));
5064 out:
5065         return status;
5066 }
5067
5068 /*
5069  * Decode OPEN response
5070  */
5071 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5072 {
5073         struct xdr_stream xdr;
5074         struct compound_hdr hdr;
5075         int status;
5076
5077         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5078         status = decode_compound_hdr(&xdr, &hdr);
5079         if (status)
5080                 goto out;
5081         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5082         if (status)
5083                 goto out;
5084         status = decode_putfh(&xdr);
5085         if (status)
5086                 goto out;
5087         status = decode_savefh(&xdr);
5088         if (status)
5089                 goto out;
5090         status = decode_open(&xdr, res);
5091         if (status)
5092                 goto out;
5093         if (decode_getfh(&xdr, &res->fh) != 0)
5094                 goto out;
5095         if (decode_getfattr(&xdr, res->f_attr, res->server,
5096                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5097                 goto out;
5098         if (decode_restorefh(&xdr) != 0)
5099                 goto out;
5100         decode_getfattr(&xdr, res->dir_attr, res->server,
5101                         !RPC_IS_ASYNC(rqstp->rq_task));
5102 out:
5103         return status;
5104 }
5105
5106 /*
5107  * Decode OPEN_CONFIRM response
5108  */
5109 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5110 {
5111         struct xdr_stream xdr;
5112         struct compound_hdr hdr;
5113         int status;
5114
5115         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5116         status = decode_compound_hdr(&xdr, &hdr);
5117         if (status)
5118                 goto out;
5119         status = decode_putfh(&xdr);
5120         if (status)
5121                 goto out;
5122         status = decode_open_confirm(&xdr, res);
5123 out:
5124         return status;
5125 }
5126
5127 /*
5128  * Decode OPEN response
5129  */
5130 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5131 {
5132         struct xdr_stream xdr;
5133         struct compound_hdr hdr;
5134         int status;
5135
5136         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5137         status = decode_compound_hdr(&xdr, &hdr);
5138         if (status)
5139                 goto out;
5140         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5141         if (status)
5142                 goto out;
5143         status = decode_putfh(&xdr);
5144         if (status)
5145                 goto out;
5146         status = decode_open(&xdr, res);
5147         if (status)
5148                 goto out;
5149         decode_getfattr(&xdr, res->f_attr, res->server,
5150                         !RPC_IS_ASYNC(rqstp->rq_task));
5151 out:
5152         return status;
5153 }
5154
5155 /*
5156  * Decode SETATTR response
5157  */
5158 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5159 {
5160         struct xdr_stream xdr;
5161         struct compound_hdr hdr;
5162         int status;
5163
5164         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5165         status = decode_compound_hdr(&xdr, &hdr);
5166         if (status)
5167                 goto out;
5168         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5169         if (status)
5170                 goto out;
5171         status = decode_putfh(&xdr);
5172         if (status)
5173                 goto out;
5174         status = decode_setattr(&xdr);
5175         if (status)
5176                 goto out;
5177         decode_getfattr(&xdr, res->fattr, res->server,
5178                         !RPC_IS_ASYNC(rqstp->rq_task));
5179 out:
5180         return status;
5181 }
5182
5183 /*
5184  * Decode LOCK response
5185  */
5186 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5187 {
5188         struct xdr_stream xdr;
5189         struct compound_hdr hdr;
5190         int status;
5191
5192         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5193         status = decode_compound_hdr(&xdr, &hdr);
5194         if (status)
5195                 goto out;
5196         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5197         if (status)
5198                 goto out;
5199         status = decode_putfh(&xdr);
5200         if (status)
5201                 goto out;
5202         status = decode_lock(&xdr, res);
5203 out:
5204         return status;
5205 }
5206
5207 /*
5208  * Decode LOCKT response
5209  */
5210 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5211 {
5212         struct xdr_stream xdr;
5213         struct compound_hdr hdr;
5214         int status;
5215
5216         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5217         status = decode_compound_hdr(&xdr, &hdr);
5218         if (status)
5219                 goto out;
5220         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5221         if (status)
5222                 goto out;
5223         status = decode_putfh(&xdr);
5224         if (status)
5225                 goto out;
5226         status = decode_lockt(&xdr, res);
5227 out:
5228         return status;
5229 }
5230
5231 /*
5232  * Decode LOCKU response
5233  */
5234 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5235 {
5236         struct xdr_stream xdr;
5237         struct compound_hdr hdr;
5238         int status;
5239
5240         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5241         status = decode_compound_hdr(&xdr, &hdr);
5242         if (status)
5243                 goto out;
5244         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5245         if (status)
5246                 goto out;
5247         status = decode_putfh(&xdr);
5248         if (status)
5249                 goto out;
5250         status = decode_locku(&xdr, res);
5251 out:
5252         return status;
5253 }
5254
5255 /*
5256  * Decode READLINK response
5257  */
5258 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5259                                  struct nfs4_readlink_res *res)
5260 {
5261         struct xdr_stream xdr;
5262         struct compound_hdr hdr;
5263         int status;
5264
5265         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5266         status = decode_compound_hdr(&xdr, &hdr);
5267         if (status)
5268                 goto out;
5269         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5270         if (status)
5271                 goto out;
5272         status = decode_putfh(&xdr);
5273         if (status)
5274                 goto out;
5275         status = decode_readlink(&xdr, rqstp);
5276 out:
5277         return status;
5278 }
5279
5280 /*
5281  * Decode READDIR response
5282  */
5283 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5284 {
5285         struct xdr_stream xdr;
5286         struct compound_hdr hdr;
5287         int status;
5288
5289         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5290         status = decode_compound_hdr(&xdr, &hdr);
5291         if (status)
5292                 goto out;
5293         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5294         if (status)
5295                 goto out;
5296         status = decode_putfh(&xdr);
5297         if (status)
5298                 goto out;
5299         status = decode_readdir(&xdr, rqstp, res);
5300 out:
5301         return status;
5302 }
5303
5304 /*
5305  * Decode Read response
5306  */
5307 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5308 {
5309         struct xdr_stream xdr;
5310         struct compound_hdr hdr;
5311         int status;
5312
5313         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5314         status = decode_compound_hdr(&xdr, &hdr);
5315         if (status)
5316                 goto out;
5317         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5318         if (status)
5319                 goto out;
5320         status = decode_putfh(&xdr);
5321         if (status)
5322                 goto out;
5323         status = decode_read(&xdr, rqstp, res);
5324         if (!status)
5325                 status = res->count;
5326 out:
5327         return status;
5328 }
5329
5330 /*
5331  * Decode WRITE response
5332  */
5333 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5334 {
5335         struct xdr_stream xdr;
5336         struct compound_hdr hdr;
5337         int status;
5338
5339         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5340         status = decode_compound_hdr(&xdr, &hdr);
5341         if (status)
5342                 goto out;
5343         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5344         if (status)
5345                 goto out;
5346         status = decode_putfh(&xdr);
5347         if (status)
5348                 goto out;
5349         status = decode_write(&xdr, res);
5350         if (status)
5351                 goto out;
5352         decode_getfattr(&xdr, res->fattr, res->server,
5353                         !RPC_IS_ASYNC(rqstp->rq_task));
5354         if (!status)
5355                 status = res->count;
5356 out:
5357         return status;
5358 }
5359
5360 /*
5361  * Decode COMMIT response
5362  */
5363 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5364 {
5365         struct xdr_stream xdr;
5366         struct compound_hdr hdr;
5367         int status;
5368
5369         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5370         status = decode_compound_hdr(&xdr, &hdr);
5371         if (status)
5372                 goto out;
5373         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5374         if (status)
5375                 goto out;
5376         status = decode_putfh(&xdr);
5377         if (status)
5378                 goto out;
5379         status = decode_commit(&xdr, res);
5380         if (status)
5381                 goto out;
5382         decode_getfattr(&xdr, res->fattr, res->server,
5383                         !RPC_IS_ASYNC(rqstp->rq_task));
5384 out:
5385         return status;
5386 }
5387
5388 /*
5389  * Decode FSINFO response
5390  */
5391 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5392                                struct nfs4_fsinfo_res *res)
5393 {
5394         struct xdr_stream xdr;
5395         struct compound_hdr hdr;
5396         int status;
5397
5398         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5399         status = decode_compound_hdr(&xdr, &hdr);
5400         if (!status)
5401                 status = decode_sequence(&xdr, &res->seq_res, req);
5402         if (!status)
5403                 status = decode_putfh(&xdr);
5404         if (!status)
5405                 status = decode_fsinfo(&xdr, res->fsinfo);
5406         return status;
5407 }
5408
5409 /*
5410  * Decode PATHCONF response
5411  */
5412 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5413                                  struct nfs4_pathconf_res *res)
5414 {
5415         struct xdr_stream xdr;
5416         struct compound_hdr hdr;
5417         int status;
5418
5419         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5420         status = decode_compound_hdr(&xdr, &hdr);
5421         if (!status)
5422                 status = decode_sequence(&xdr, &res->seq_res, req);
5423         if (!status)
5424                 status = decode_putfh(&xdr);
5425         if (!status)
5426                 status = decode_pathconf(&xdr, res->pathconf);
5427         return status;
5428 }
5429
5430 /*
5431  * Decode STATFS response
5432  */
5433 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5434                                struct nfs4_statfs_res *res)
5435 {
5436         struct xdr_stream xdr;
5437         struct compound_hdr hdr;
5438         int status;
5439
5440         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5441         status = decode_compound_hdr(&xdr, &hdr);
5442         if (!status)
5443                 status = decode_sequence(&xdr, &res->seq_res, req);
5444         if (!status)
5445                 status = decode_putfh(&xdr);
5446         if (!status)
5447                 status = decode_statfs(&xdr, res->fsstat);
5448         return status;
5449 }
5450
5451 /*
5452  * Decode GETATTR_BITMAP response
5453  */
5454 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5455 {
5456         struct xdr_stream xdr;
5457         struct compound_hdr hdr;
5458         int status;
5459
5460         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5461         status = decode_compound_hdr(&xdr, &hdr);
5462         if (status)
5463                 goto out;
5464         status = decode_sequence(&xdr, &res->seq_res, req);
5465         if (status)
5466                 goto out;
5467         if ((status = decode_putfh(&xdr)) != 0)
5468                 goto out;
5469         status = decode_server_caps(&xdr, res);
5470 out:
5471         return status;
5472 }
5473
5474 /*
5475  * Decode RENEW response
5476  */
5477 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5478 {
5479         struct xdr_stream xdr;
5480         struct compound_hdr hdr;
5481         int status;
5482
5483         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5484         status = decode_compound_hdr(&xdr, &hdr);
5485         if (!status)
5486                 status = decode_renew(&xdr);
5487         return status;
5488 }
5489
5490 /*
5491  * Decode SETCLIENTID response
5492  */
5493 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5494                 struct nfs_client *clp)
5495 {
5496         struct xdr_stream xdr;
5497         struct compound_hdr hdr;
5498         int status;
5499
5500         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5501         status = decode_compound_hdr(&xdr, &hdr);
5502         if (!status)
5503                 status = decode_setclientid(&xdr, clp);
5504         return status;
5505 }
5506
5507 /*
5508  * Decode SETCLIENTID_CONFIRM response
5509  */
5510 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5511 {
5512         struct xdr_stream xdr;
5513         struct compound_hdr hdr;
5514         int status;
5515
5516         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5517         status = decode_compound_hdr(&xdr, &hdr);
5518         if (!status)
5519                 status = decode_setclientid_confirm(&xdr);
5520         if (!status)
5521                 status = decode_putrootfh(&xdr);
5522         if (!status)
5523                 status = decode_fsinfo(&xdr, fsinfo);
5524         return status;
5525 }
5526
5527 /*
5528  * Decode DELEGRETURN response
5529  */
5530 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5531 {
5532         struct xdr_stream xdr;
5533         struct compound_hdr hdr;
5534         int status;
5535
5536         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5537         status = decode_compound_hdr(&xdr, &hdr);
5538         if (status)
5539                 goto out;
5540         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5541         if (status)
5542                 goto out;
5543         status = decode_putfh(&xdr);
5544         if (status != 0)
5545                 goto out;
5546         status = decode_delegreturn(&xdr);
5547         decode_getfattr(&xdr, res->fattr, res->server,
5548                         !RPC_IS_ASYNC(rqstp->rq_task));
5549 out:
5550         return status;
5551 }
5552
5553 /*
5554  * Decode FS_LOCATIONS response
5555  */
5556 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5557                                      struct nfs4_fs_locations_res *res)
5558 {
5559         struct xdr_stream xdr;
5560         struct compound_hdr hdr;
5561         int status;
5562
5563         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5564         status = decode_compound_hdr(&xdr, &hdr);
5565         if (status)
5566                 goto out;
5567         status = decode_sequence(&xdr, &res->seq_res, req);
5568         if (status)
5569                 goto out;
5570         if ((status = decode_putfh(&xdr)) != 0)
5571                 goto out;
5572         if ((status = decode_lookup(&xdr)) != 0)
5573                 goto out;
5574         xdr_enter_page(&xdr, PAGE_SIZE);
5575         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5576                                  res->fs_locations->server,
5577                                  !RPC_IS_ASYNC(req->rq_task));
5578 out:
5579         return status;
5580 }
5581
5582 #if defined(CONFIG_NFS_V4_1)
5583 /*
5584  * Decode EXCHANGE_ID response
5585  */
5586 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5587                                     void *res)
5588 {
5589         struct xdr_stream xdr;
5590         struct compound_hdr hdr;
5591         int status;
5592
5593         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5594         status = decode_compound_hdr(&xdr, &hdr);
5595         if (!status)
5596                 status = decode_exchange_id(&xdr, res);
5597         return status;
5598 }
5599
5600 /*
5601  * Decode CREATE_SESSION response
5602  */
5603 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5604                                        struct nfs41_create_session_res *res)
5605 {
5606         struct xdr_stream xdr;
5607         struct compound_hdr hdr;
5608         int status;
5609
5610         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5611         status = decode_compound_hdr(&xdr, &hdr);
5612         if (!status)
5613                 status = decode_create_session(&xdr, res);
5614         return status;
5615 }
5616
5617 /*
5618  * Decode DESTROY_SESSION response
5619  */
5620 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5621                                         void *dummy)
5622 {
5623         struct xdr_stream xdr;
5624         struct compound_hdr hdr;
5625         int status;
5626
5627         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5628         status = decode_compound_hdr(&xdr, &hdr);
5629         if (!status)
5630                 status = decode_destroy_session(&xdr, dummy);
5631         return status;
5632 }
5633
5634 /*
5635  * Decode SEQUENCE response
5636  */
5637 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5638                                  struct nfs4_sequence_res *res)
5639 {
5640         struct xdr_stream xdr;
5641         struct compound_hdr hdr;
5642         int status;
5643
5644         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5645         status = decode_compound_hdr(&xdr, &hdr);
5646         if (!status)
5647                 status = decode_sequence(&xdr, res, rqstp);
5648         return status;
5649 }
5650
5651 /*
5652  * Decode GET_LEASE_TIME response
5653  */
5654 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5655                                        struct nfs4_get_lease_time_res *res)
5656 {
5657         struct xdr_stream xdr;
5658         struct compound_hdr hdr;
5659         int status;
5660
5661         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5662         status = decode_compound_hdr(&xdr, &hdr);
5663         if (!status)
5664                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5665         if (!status)
5666                 status = decode_putrootfh(&xdr);
5667         if (!status)
5668                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5669         return status;
5670 }
5671
5672 /*
5673  * Decode RECLAIM_COMPLETE response
5674  */
5675 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5676                                          struct nfs41_reclaim_complete_res *res)
5677 {
5678         struct xdr_stream xdr;
5679         struct compound_hdr hdr;
5680         int status;
5681
5682         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5683         status = decode_compound_hdr(&xdr, &hdr);
5684         if (!status)
5685                 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5686         if (!status)
5687                 status = decode_reclaim_complete(&xdr, (void *)NULL);
5688         return status;
5689 }
5690 #endif /* CONFIG_NFS_V4_1 */
5691
5692 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5693 {
5694         uint32_t bitmap[2] = {0};
5695         uint32_t len;
5696
5697         if (!*p++) {
5698                 if (!*p)
5699                         return ERR_PTR(-EAGAIN);
5700                 entry->eof = 1;
5701                 return ERR_PTR(-EBADCOOKIE);
5702         }
5703
5704         entry->prev_cookie = entry->cookie;
5705         p = xdr_decode_hyper(p, &entry->cookie);
5706         entry->len = ntohl(*p++);
5707         entry->name = (const char *) p;
5708         p += XDR_QUADLEN(entry->len);
5709
5710         /*
5711          * In case the server doesn't return an inode number,
5712          * we fake one here.  (We don't use inode number 0,
5713          * since glibc seems to choke on it...)
5714          */
5715         entry->ino = 1;
5716
5717         len = ntohl(*p++);              /* bitmap length */
5718         if (len-- > 0) {
5719                 bitmap[0] = ntohl(*p++);
5720                 if (len-- > 0) {
5721                         bitmap[1] = ntohl(*p++);
5722                         p += len;
5723                 }
5724         }
5725         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5726         if (len > 0) {
5727                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5728                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5729                         /* Ignore the return value of rdattr_error for now */
5730                         p++;
5731                         len--;
5732                 }
5733                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5734                         xdr_decode_hyper(p, &entry->ino);
5735                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5736                         xdr_decode_hyper(p, &entry->ino);
5737                 p += len;
5738         }
5739
5740         entry->eof = !p[0] && p[1];
5741         return p;
5742 }
5743
5744 /*
5745  * We need to translate between nfs status return values and
5746  * the local errno values which may not be the same.
5747  */
5748 static struct {
5749         int stat;
5750         int errno;
5751 } nfs_errtbl[] = {
5752         { NFS4_OK,              0               },
5753         { NFS4ERR_PERM,         -EPERM          },
5754         { NFS4ERR_NOENT,        -ENOENT         },
5755         { NFS4ERR_IO,           -errno_NFSERR_IO},
5756         { NFS4ERR_NXIO,         -ENXIO          },
5757         { NFS4ERR_ACCESS,       -EACCES         },
5758         { NFS4ERR_EXIST,        -EEXIST         },
5759         { NFS4ERR_XDEV,         -EXDEV          },
5760         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5761         { NFS4ERR_ISDIR,        -EISDIR         },
5762         { NFS4ERR_INVAL,        -EINVAL         },
5763         { NFS4ERR_FBIG,         -EFBIG          },
5764         { NFS4ERR_NOSPC,        -ENOSPC         },
5765         { NFS4ERR_ROFS,         -EROFS          },
5766         { NFS4ERR_MLINK,        -EMLINK         },
5767         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5768         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5769         { NFS4ERR_DQUOT,        -EDQUOT         },
5770         { NFS4ERR_STALE,        -ESTALE         },
5771         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5772         { NFS4ERR_BADOWNER,     -EINVAL         },
5773         { NFS4ERR_BADNAME,      -EINVAL         },
5774         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5775         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5776         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5777         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
5778         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5779         { NFS4ERR_LOCKED,       -EAGAIN         },
5780         { NFS4ERR_SYMLINK,      -ELOOP          },
5781         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5782         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5783         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5784                                                     * to be handled by a
5785                                                     * middle-layer.
5786                                                     */
5787         { -1,                   -EIO            }
5788 };
5789
5790 /*
5791  * Convert an NFS error code to a local one.
5792  * This one is used jointly by NFSv2 and NFSv3.
5793  */
5794 static int
5795 nfs4_stat_to_errno(int stat)
5796 {
5797         int i;
5798         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5799                 if (nfs_errtbl[i].stat == stat)
5800                         return nfs_errtbl[i].errno;
5801         }
5802         if (stat <= 10000 || stat > 10100) {
5803                 /* The server is looney tunes. */
5804                 return -ESERVERFAULT;
5805         }
5806         /* If we cannot translate the error, the recovery routines should
5807          * handle it.
5808          * Note: remaining NFSv4 error codes have values > 10000, so should
5809          * not conflict with native Linux error codes.
5810          */
5811         return -stat;
5812 }
5813
5814 #define PROC(proc, argtype, restype)                            \
5815 [NFSPROC4_CLNT_##proc] = {                                      \
5816         .p_proc   = NFSPROC4_COMPOUND,                          \
5817         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5818         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5819         .p_arglen = NFS4_##argtype##_sz,                        \
5820         .p_replen = NFS4_##restype##_sz,                        \
5821         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5822         .p_name   = #proc,                                      \
5823 }
5824
5825 struct rpc_procinfo     nfs4_procedures[] = {
5826   PROC(READ,            enc_read,       dec_read),
5827   PROC(WRITE,           enc_write,      dec_write),
5828   PROC(COMMIT,          enc_commit,     dec_commit),
5829   PROC(OPEN,            enc_open,       dec_open),
5830   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5831   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5832   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5833   PROC(CLOSE,           enc_close,      dec_close),
5834   PROC(SETATTR,         enc_setattr,    dec_setattr),
5835   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5836   PROC(RENEW,           enc_renew,      dec_renew),
5837   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5838   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5839   PROC(LOCK,            enc_lock,       dec_lock),
5840   PROC(LOCKT,           enc_lockt,      dec_lockt),
5841   PROC(LOCKU,           enc_locku,      dec_locku),
5842   PROC(ACCESS,          enc_access,     dec_access),
5843   PROC(GETATTR,         enc_getattr,    dec_getattr),
5844   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5845   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5846   PROC(REMOVE,          enc_remove,     dec_remove),
5847   PROC(RENAME,          enc_rename,     dec_rename),
5848   PROC(LINK,            enc_link,       dec_link),
5849   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5850   PROC(CREATE,          enc_create,     dec_create),
5851   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5852   PROC(STATFS,          enc_statfs,     dec_statfs),
5853   PROC(READLINK,        enc_readlink,   dec_readlink),
5854   PROC(READDIR,         enc_readdir,    dec_readdir),
5855   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5856   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5857   PROC(GETACL,          enc_getacl,     dec_getacl),
5858   PROC(SETACL,          enc_setacl,     dec_setacl),
5859   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5860 #if defined(CONFIG_NFS_V4_1)
5861   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5862   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5863   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5864   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5865   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5866   PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
5867 #endif /* CONFIG_NFS_V4_1 */
5868 };
5869
5870 struct rpc_version              nfs_version4 = {
5871         .number                 = 4,
5872         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5873         .procs                  = nfs4_procedures
5874 };
5875
5876 /*
5877  * Local variables:
5878  *  c-basic-offset: 8
5879  * End:
5880  */