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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         u32 max_resp_sz_cached;
1582
1583         /*
1584          * Assumes OPEN is the biggest non-idempotent compound.
1585          * 2 is the verifier.
1586          */
1587         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1588                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1589
1590         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1591                         clp->cl_ipaddr);
1592
1593         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1594         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1595         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1596         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1597         *p++ = cpu_to_be32(args->flags);                        /*flags */
1598
1599         /* Fore Channel */
1600         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1601         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1602         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1603         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1604         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1605         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1606         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1607
1608         /* Back Channel */
1609         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1610         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1611         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1612         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1613         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1614         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1615         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1616
1617         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1618         *p++ = cpu_to_be32(1);
1619         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1620
1621         /* authsys_parms rfc1831 */
1622         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1623         p = xdr_encode_opaque(p, machine_name, len);
1624         *p++ = cpu_to_be32(0);                          /* UID */
1625         *p++ = cpu_to_be32(0);                          /* GID */
1626         *p = cpu_to_be32(0);                            /* No more gids */
1627         hdr->nops++;
1628         hdr->replen += decode_create_session_maxsz;
1629 }
1630
1631 static void encode_destroy_session(struct xdr_stream *xdr,
1632                                    struct nfs4_session *session,
1633                                    struct compound_hdr *hdr)
1634 {
1635         __be32 *p;
1636         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1637         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1638         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1639         hdr->nops++;
1640         hdr->replen += decode_destroy_session_maxsz;
1641 }
1642
1643 static void encode_reclaim_complete(struct xdr_stream *xdr,
1644                                     struct nfs41_reclaim_complete_args *args,
1645                                     struct compound_hdr *hdr)
1646 {
1647         __be32 *p;
1648
1649         p = reserve_space(xdr, 8);
1650         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1651         *p++ = cpu_to_be32(args->one_fs);
1652         hdr->nops++;
1653         hdr->replen += decode_reclaim_complete_maxsz;
1654 }
1655 #endif /* CONFIG_NFS_V4_1 */
1656
1657 static void encode_sequence(struct xdr_stream *xdr,
1658                             const struct nfs4_sequence_args *args,
1659                             struct compound_hdr *hdr)
1660 {
1661 #if defined(CONFIG_NFS_V4_1)
1662         struct nfs4_session *session = args->sa_session;
1663         struct nfs4_slot_table *tp;
1664         struct nfs4_slot *slot;
1665         __be32 *p;
1666
1667         if (!session)
1668                 return;
1669
1670         tp = &session->fc_slot_table;
1671
1672         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1673         slot = tp->slots + args->sa_slotid;
1674
1675         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1676         *p++ = cpu_to_be32(OP_SEQUENCE);
1677
1678         /*
1679          * Sessionid + seqid + slotid + max slotid + cache_this
1680          */
1681         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1682                 "max_slotid=%d cache_this=%d\n",
1683                 __func__,
1684                 ((u32 *)session->sess_id.data)[0],
1685                 ((u32 *)session->sess_id.data)[1],
1686                 ((u32 *)session->sess_id.data)[2],
1687                 ((u32 *)session->sess_id.data)[3],
1688                 slot->seq_nr, args->sa_slotid,
1689                 tp->highest_used_slotid, args->sa_cache_this);
1690         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1691         *p++ = cpu_to_be32(slot->seq_nr);
1692         *p++ = cpu_to_be32(args->sa_slotid);
1693         *p++ = cpu_to_be32(tp->highest_used_slotid);
1694         *p = cpu_to_be32(args->sa_cache_this);
1695         hdr->nops++;
1696         hdr->replen += decode_sequence_maxsz;
1697 #endif /* CONFIG_NFS_V4_1 */
1698 }
1699
1700 /*
1701  * END OF "GENERIC" ENCODE ROUTINES.
1702  */
1703
1704 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1705 {
1706 #if defined(CONFIG_NFS_V4_1)
1707         if (args->sa_session)
1708                 return args->sa_session->clp->cl_minorversion;
1709 #endif /* CONFIG_NFS_V4_1 */
1710         return 0;
1711 }
1712
1713 /*
1714  * Encode an ACCESS request
1715  */
1716 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1717 {
1718         struct xdr_stream xdr;
1719         struct compound_hdr hdr = {
1720                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1721         };
1722
1723         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1724         encode_compound_hdr(&xdr, req, &hdr);
1725         encode_sequence(&xdr, &args->seq_args, &hdr);
1726         encode_putfh(&xdr, args->fh, &hdr);
1727         encode_access(&xdr, args->access, &hdr);
1728         encode_getfattr(&xdr, args->bitmask, &hdr);
1729         encode_nops(&hdr);
1730         return 0;
1731 }
1732
1733 /*
1734  * Encode LOOKUP request
1735  */
1736 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1737 {
1738         struct xdr_stream xdr;
1739         struct compound_hdr hdr = {
1740                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1741         };
1742
1743         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1744         encode_compound_hdr(&xdr, req, &hdr);
1745         encode_sequence(&xdr, &args->seq_args, &hdr);
1746         encode_putfh(&xdr, args->dir_fh, &hdr);
1747         encode_lookup(&xdr, args->name, &hdr);
1748         encode_getfh(&xdr, &hdr);
1749         encode_getfattr(&xdr, args->bitmask, &hdr);
1750         encode_nops(&hdr);
1751         return 0;
1752 }
1753
1754 /*
1755  * Encode LOOKUP_ROOT request
1756  */
1757 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1758 {
1759         struct xdr_stream xdr;
1760         struct compound_hdr hdr = {
1761                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1762         };
1763
1764         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1765         encode_compound_hdr(&xdr, req, &hdr);
1766         encode_sequence(&xdr, &args->seq_args, &hdr);
1767         encode_putrootfh(&xdr, &hdr);
1768         encode_getfh(&xdr, &hdr);
1769         encode_getfattr(&xdr, args->bitmask, &hdr);
1770         encode_nops(&hdr);
1771         return 0;
1772 }
1773
1774 /*
1775  * Encode REMOVE request
1776  */
1777 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1778 {
1779         struct xdr_stream xdr;
1780         struct compound_hdr hdr = {
1781                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1782         };
1783
1784         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1785         encode_compound_hdr(&xdr, req, &hdr);
1786         encode_sequence(&xdr, &args->seq_args, &hdr);
1787         encode_putfh(&xdr, args->fh, &hdr);
1788         encode_remove(&xdr, &args->name, &hdr);
1789         encode_getfattr(&xdr, args->bitmask, &hdr);
1790         encode_nops(&hdr);
1791         return 0;
1792 }
1793
1794 /*
1795  * Encode RENAME request
1796  */
1797 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1798 {
1799         struct xdr_stream xdr;
1800         struct compound_hdr hdr = {
1801                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1802         };
1803
1804         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805         encode_compound_hdr(&xdr, req, &hdr);
1806         encode_sequence(&xdr, &args->seq_args, &hdr);
1807         encode_putfh(&xdr, args->old_dir, &hdr);
1808         encode_savefh(&xdr, &hdr);
1809         encode_putfh(&xdr, args->new_dir, &hdr);
1810         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1811         encode_getfattr(&xdr, args->bitmask, &hdr);
1812         encode_restorefh(&xdr, &hdr);
1813         encode_getfattr(&xdr, args->bitmask, &hdr);
1814         encode_nops(&hdr);
1815         return 0;
1816 }
1817
1818 /*
1819  * Encode LINK request
1820  */
1821 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1822 {
1823         struct xdr_stream xdr;
1824         struct compound_hdr hdr = {
1825                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1826         };
1827
1828         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1829         encode_compound_hdr(&xdr, req, &hdr);
1830         encode_sequence(&xdr, &args->seq_args, &hdr);
1831         encode_putfh(&xdr, args->fh, &hdr);
1832         encode_savefh(&xdr, &hdr);
1833         encode_putfh(&xdr, args->dir_fh, &hdr);
1834         encode_link(&xdr, args->name, &hdr);
1835         encode_getfattr(&xdr, args->bitmask, &hdr);
1836         encode_restorefh(&xdr, &hdr);
1837         encode_getfattr(&xdr, args->bitmask, &hdr);
1838         encode_nops(&hdr);
1839         return 0;
1840 }
1841
1842 /*
1843  * Encode CREATE request
1844  */
1845 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1846 {
1847         struct xdr_stream xdr;
1848         struct compound_hdr hdr = {
1849                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1850         };
1851
1852         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1853         encode_compound_hdr(&xdr, req, &hdr);
1854         encode_sequence(&xdr, &args->seq_args, &hdr);
1855         encode_putfh(&xdr, args->dir_fh, &hdr);
1856         encode_savefh(&xdr, &hdr);
1857         encode_create(&xdr, args, &hdr);
1858         encode_getfh(&xdr, &hdr);
1859         encode_getfattr(&xdr, args->bitmask, &hdr);
1860         encode_restorefh(&xdr, &hdr);
1861         encode_getfattr(&xdr, args->bitmask, &hdr);
1862         encode_nops(&hdr);
1863         return 0;
1864 }
1865
1866 /*
1867  * Encode SYMLINK request
1868  */
1869 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1870 {
1871         return nfs4_xdr_enc_create(req, p, args);
1872 }
1873
1874 /*
1875  * Encode GETATTR request
1876  */
1877 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1878 {
1879         struct xdr_stream xdr;
1880         struct compound_hdr hdr = {
1881                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1882         };
1883
1884         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1885         encode_compound_hdr(&xdr, req, &hdr);
1886         encode_sequence(&xdr, &args->seq_args, &hdr);
1887         encode_putfh(&xdr, args->fh, &hdr);
1888         encode_getfattr(&xdr, args->bitmask, &hdr);
1889         encode_nops(&hdr);
1890         return 0;
1891 }
1892
1893 /*
1894  * Encode a CLOSE request
1895  */
1896 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1897 {
1898         struct xdr_stream xdr;
1899         struct compound_hdr hdr = {
1900                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1901         };
1902
1903         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1904         encode_compound_hdr(&xdr, req, &hdr);
1905         encode_sequence(&xdr, &args->seq_args, &hdr);
1906         encode_putfh(&xdr, args->fh, &hdr);
1907         encode_close(&xdr, args, &hdr);
1908         encode_getfattr(&xdr, args->bitmask, &hdr);
1909         encode_nops(&hdr);
1910         return 0;
1911 }
1912
1913 /*
1914  * Encode an OPEN request
1915  */
1916 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1917 {
1918         struct xdr_stream xdr;
1919         struct compound_hdr hdr = {
1920                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1921         };
1922
1923         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1924         encode_compound_hdr(&xdr, req, &hdr);
1925         encode_sequence(&xdr, &args->seq_args, &hdr);
1926         encode_putfh(&xdr, args->fh, &hdr);
1927         encode_savefh(&xdr, &hdr);
1928         encode_open(&xdr, args, &hdr);
1929         encode_getfh(&xdr, &hdr);
1930         encode_getfattr(&xdr, args->bitmask, &hdr);
1931         encode_restorefh(&xdr, &hdr);
1932         encode_getfattr(&xdr, args->bitmask, &hdr);
1933         encode_nops(&hdr);
1934         return 0;
1935 }
1936
1937 /*
1938  * Encode an OPEN_CONFIRM request
1939  */
1940 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1941 {
1942         struct xdr_stream xdr;
1943         struct compound_hdr hdr = {
1944                 .nops   = 0,
1945         };
1946
1947         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1948         encode_compound_hdr(&xdr, req, &hdr);
1949         encode_putfh(&xdr, args->fh, &hdr);
1950         encode_open_confirm(&xdr, args, &hdr);
1951         encode_nops(&hdr);
1952         return 0;
1953 }
1954
1955 /*
1956  * Encode an OPEN request with no attributes.
1957  */
1958 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1959 {
1960         struct xdr_stream xdr;
1961         struct compound_hdr hdr = {
1962                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1963         };
1964
1965         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1966         encode_compound_hdr(&xdr, req, &hdr);
1967         encode_sequence(&xdr, &args->seq_args, &hdr);
1968         encode_putfh(&xdr, args->fh, &hdr);
1969         encode_open(&xdr, args, &hdr);
1970         encode_getfattr(&xdr, args->bitmask, &hdr);
1971         encode_nops(&hdr);
1972         return 0;
1973 }
1974
1975 /*
1976  * Encode an OPEN_DOWNGRADE request
1977  */
1978 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1979 {
1980         struct xdr_stream xdr;
1981         struct compound_hdr hdr = {
1982                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1983         };
1984
1985         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1986         encode_compound_hdr(&xdr, req, &hdr);
1987         encode_sequence(&xdr, &args->seq_args, &hdr);
1988         encode_putfh(&xdr, args->fh, &hdr);
1989         encode_open_downgrade(&xdr, args, &hdr);
1990         encode_getfattr(&xdr, args->bitmask, &hdr);
1991         encode_nops(&hdr);
1992         return 0;
1993 }
1994
1995 /*
1996  * Encode a LOCK request
1997  */
1998 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1999 {
2000         struct xdr_stream xdr;
2001         struct compound_hdr hdr = {
2002                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2003         };
2004
2005         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2006         encode_compound_hdr(&xdr, req, &hdr);
2007         encode_sequence(&xdr, &args->seq_args, &hdr);
2008         encode_putfh(&xdr, args->fh, &hdr);
2009         encode_lock(&xdr, args, &hdr);
2010         encode_nops(&hdr);
2011         return 0;
2012 }
2013
2014 /*
2015  * Encode a LOCKT request
2016  */
2017 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2018 {
2019         struct xdr_stream xdr;
2020         struct compound_hdr hdr = {
2021                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022         };
2023
2024         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2025         encode_compound_hdr(&xdr, req, &hdr);
2026         encode_sequence(&xdr, &args->seq_args, &hdr);
2027         encode_putfh(&xdr, args->fh, &hdr);
2028         encode_lockt(&xdr, args, &hdr);
2029         encode_nops(&hdr);
2030         return 0;
2031 }
2032
2033 /*
2034  * Encode a LOCKU request
2035  */
2036 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2037 {
2038         struct xdr_stream xdr;
2039         struct compound_hdr hdr = {
2040                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2041         };
2042
2043         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2044         encode_compound_hdr(&xdr, req, &hdr);
2045         encode_sequence(&xdr, &args->seq_args, &hdr);
2046         encode_putfh(&xdr, args->fh, &hdr);
2047         encode_locku(&xdr, args, &hdr);
2048         encode_nops(&hdr);
2049         return 0;
2050 }
2051
2052 /*
2053  * Encode a READLINK request
2054  */
2055 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2056 {
2057         struct xdr_stream xdr;
2058         struct compound_hdr hdr = {
2059                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2060         };
2061
2062         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2063         encode_compound_hdr(&xdr, req, &hdr);
2064         encode_sequence(&xdr, &args->seq_args, &hdr);
2065         encode_putfh(&xdr, args->fh, &hdr);
2066         encode_readlink(&xdr, args, req, &hdr);
2067
2068         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2069                         args->pgbase, args->pglen);
2070         encode_nops(&hdr);
2071         return 0;
2072 }
2073
2074 /*
2075  * Encode a READDIR request
2076  */
2077 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2078 {
2079         struct xdr_stream xdr;
2080         struct compound_hdr hdr = {
2081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082         };
2083
2084         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2085         encode_compound_hdr(&xdr, req, &hdr);
2086         encode_sequence(&xdr, &args->seq_args, &hdr);
2087         encode_putfh(&xdr, args->fh, &hdr);
2088         encode_readdir(&xdr, args, req, &hdr);
2089
2090         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2091                          args->pgbase, args->count);
2092         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2093                         __func__, hdr.replen << 2, args->pages,
2094                         args->pgbase, args->count);
2095         encode_nops(&hdr);
2096         return 0;
2097 }
2098
2099 /*
2100  * Encode a READ request
2101  */
2102 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2103 {
2104         struct xdr_stream xdr;
2105         struct compound_hdr hdr = {
2106                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2107         };
2108
2109         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2110         encode_compound_hdr(&xdr, req, &hdr);
2111         encode_sequence(&xdr, &args->seq_args, &hdr);
2112         encode_putfh(&xdr, args->fh, &hdr);
2113         encode_read(&xdr, args, &hdr);
2114
2115         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2116                          args->pages, args->pgbase, args->count);
2117         req->rq_rcv_buf.flags |= XDRBUF_READ;
2118         encode_nops(&hdr);
2119         return 0;
2120 }
2121
2122 /*
2123  * Encode an SETATTR request
2124  */
2125 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2126 {
2127         struct xdr_stream xdr;
2128         struct compound_hdr hdr = {
2129                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2130         };
2131
2132         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2133         encode_compound_hdr(&xdr, req, &hdr);
2134         encode_sequence(&xdr, &args->seq_args, &hdr);
2135         encode_putfh(&xdr, args->fh, &hdr);
2136         encode_setattr(&xdr, args, args->server, &hdr);
2137         encode_getfattr(&xdr, args->bitmask, &hdr);
2138         encode_nops(&hdr);
2139         return 0;
2140 }
2141
2142 /*
2143  * Encode a GETACL request
2144  */
2145 static int
2146 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2147                 struct nfs_getaclargs *args)
2148 {
2149         struct xdr_stream xdr;
2150         struct compound_hdr hdr = {
2151                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2152         };
2153         uint32_t replen;
2154
2155         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2156         encode_compound_hdr(&xdr, req, &hdr);
2157         encode_sequence(&xdr, &args->seq_args, &hdr);
2158         encode_putfh(&xdr, args->fh, &hdr);
2159         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2160         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2161
2162         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2163                 args->acl_pages, args->acl_pgbase, args->acl_len);
2164         encode_nops(&hdr);
2165         return 0;
2166 }
2167
2168 /*
2169  * Encode a WRITE request
2170  */
2171 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2172 {
2173         struct xdr_stream xdr;
2174         struct compound_hdr hdr = {
2175                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2176         };
2177
2178         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2179         encode_compound_hdr(&xdr, req, &hdr);
2180         encode_sequence(&xdr, &args->seq_args, &hdr);
2181         encode_putfh(&xdr, args->fh, &hdr);
2182         encode_write(&xdr, args, &hdr);
2183         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2184         encode_getfattr(&xdr, args->bitmask, &hdr);
2185         encode_nops(&hdr);
2186         return 0;
2187 }
2188
2189 /*
2190  *  a COMMIT request
2191  */
2192 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2193 {
2194         struct xdr_stream xdr;
2195         struct compound_hdr hdr = {
2196                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2197         };
2198
2199         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2200         encode_compound_hdr(&xdr, req, &hdr);
2201         encode_sequence(&xdr, &args->seq_args, &hdr);
2202         encode_putfh(&xdr, args->fh, &hdr);
2203         encode_commit(&xdr, args, &hdr);
2204         encode_getfattr(&xdr, args->bitmask, &hdr);
2205         encode_nops(&hdr);
2206         return 0;
2207 }
2208
2209 /*
2210  * FSINFO request
2211  */
2212 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2213 {
2214         struct xdr_stream xdr;
2215         struct compound_hdr hdr = {
2216                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2217         };
2218
2219         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2220         encode_compound_hdr(&xdr, req, &hdr);
2221         encode_sequence(&xdr, &args->seq_args, &hdr);
2222         encode_putfh(&xdr, args->fh, &hdr);
2223         encode_fsinfo(&xdr, args->bitmask, &hdr);
2224         encode_nops(&hdr);
2225         return 0;
2226 }
2227
2228 /*
2229  * a PATHCONF request
2230  */
2231 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2232 {
2233         struct xdr_stream xdr;
2234         struct compound_hdr hdr = {
2235                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2236         };
2237
2238         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2239         encode_compound_hdr(&xdr, req, &hdr);
2240         encode_sequence(&xdr, &args->seq_args, &hdr);
2241         encode_putfh(&xdr, args->fh, &hdr);
2242         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2243                            &hdr);
2244         encode_nops(&hdr);
2245         return 0;
2246 }
2247
2248 /*
2249  * a STATFS request
2250  */
2251 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2252 {
2253         struct xdr_stream xdr;
2254         struct compound_hdr hdr = {
2255                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2256         };
2257
2258         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2259         encode_compound_hdr(&xdr, req, &hdr);
2260         encode_sequence(&xdr, &args->seq_args, &hdr);
2261         encode_putfh(&xdr, args->fh, &hdr);
2262         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2263                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2264         encode_nops(&hdr);
2265         return 0;
2266 }
2267
2268 /*
2269  * GETATTR_BITMAP request
2270  */
2271 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2272                                     struct nfs4_server_caps_arg *args)
2273 {
2274         struct xdr_stream xdr;
2275         struct compound_hdr hdr = {
2276                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2277         };
2278
2279         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2280         encode_compound_hdr(&xdr, req, &hdr);
2281         encode_sequence(&xdr, &args->seq_args, &hdr);
2282         encode_putfh(&xdr, args->fhandle, &hdr);
2283         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2284                            FATTR4_WORD0_LINK_SUPPORT|
2285                            FATTR4_WORD0_SYMLINK_SUPPORT|
2286                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2287         encode_nops(&hdr);
2288         return 0;
2289 }
2290
2291 /*
2292  * a RENEW request
2293  */
2294 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2295 {
2296         struct xdr_stream xdr;
2297         struct compound_hdr hdr = {
2298                 .nops   = 0,
2299         };
2300
2301         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2302         encode_compound_hdr(&xdr, req, &hdr);
2303         encode_renew(&xdr, clp, &hdr);
2304         encode_nops(&hdr);
2305         return 0;
2306 }
2307
2308 /*
2309  * a SETCLIENTID request
2310  */
2311 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2312 {
2313         struct xdr_stream xdr;
2314         struct compound_hdr hdr = {
2315                 .nops   = 0,
2316         };
2317
2318         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2319         encode_compound_hdr(&xdr, req, &hdr);
2320         encode_setclientid(&xdr, sc, &hdr);
2321         encode_nops(&hdr);
2322         return 0;
2323 }
2324
2325 /*
2326  * a SETCLIENTID_CONFIRM request
2327  */
2328 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2329 {
2330         struct xdr_stream xdr;
2331         struct compound_hdr hdr = {
2332                 .nops   = 0,
2333         };
2334         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2335
2336         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2337         encode_compound_hdr(&xdr, req, &hdr);
2338         encode_setclientid_confirm(&xdr, clp, &hdr);
2339         encode_putrootfh(&xdr, &hdr);
2340         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2341         encode_nops(&hdr);
2342         return 0;
2343 }
2344
2345 /*
2346  * DELEGRETURN request
2347  */
2348 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2349 {
2350         struct xdr_stream xdr;
2351         struct compound_hdr hdr = {
2352                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2353         };
2354
2355         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2356         encode_compound_hdr(&xdr, req, &hdr);
2357         encode_sequence(&xdr, &args->seq_args, &hdr);
2358         encode_putfh(&xdr, args->fhandle, &hdr);
2359         encode_delegreturn(&xdr, args->stateid, &hdr);
2360         encode_getfattr(&xdr, args->bitmask, &hdr);
2361         encode_nops(&hdr);
2362         return 0;
2363 }
2364
2365 /*
2366  * Encode FS_LOCATIONS request
2367  */
2368 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2369 {
2370         struct xdr_stream xdr;
2371         struct compound_hdr hdr = {
2372                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2373         };
2374         uint32_t replen;
2375
2376         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2377         encode_compound_hdr(&xdr, req, &hdr);
2378         encode_sequence(&xdr, &args->seq_args, &hdr);
2379         encode_putfh(&xdr, args->dir_fh, &hdr);
2380         encode_lookup(&xdr, args->name, &hdr);
2381         replen = hdr.replen;    /* get the attribute into args->page */
2382         encode_fs_locations(&xdr, args->bitmask, &hdr);
2383
2384         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2385                         0, PAGE_SIZE);
2386         encode_nops(&hdr);
2387         return 0;
2388 }
2389
2390 #if defined(CONFIG_NFS_V4_1)
2391 /*
2392  * EXCHANGE_ID request
2393  */
2394 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2395                                     struct nfs41_exchange_id_args *args)
2396 {
2397         struct xdr_stream xdr;
2398         struct compound_hdr hdr = {
2399                 .minorversion = args->client->cl_minorversion,
2400         };
2401
2402         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2403         encode_compound_hdr(&xdr, req, &hdr);
2404         encode_exchange_id(&xdr, args, &hdr);
2405         encode_nops(&hdr);
2406         return 0;
2407 }
2408
2409 /*
2410  * a CREATE_SESSION request
2411  */
2412 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2413                                        struct nfs41_create_session_args *args)
2414 {
2415         struct xdr_stream xdr;
2416         struct compound_hdr hdr = {
2417                 .minorversion = args->client->cl_minorversion,
2418         };
2419
2420         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2421         encode_compound_hdr(&xdr, req, &hdr);
2422         encode_create_session(&xdr, args, &hdr);
2423         encode_nops(&hdr);
2424         return 0;
2425 }
2426
2427 /*
2428  * a DESTROY_SESSION request
2429  */
2430 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2431                                         struct nfs4_session *session)
2432 {
2433         struct xdr_stream xdr;
2434         struct compound_hdr hdr = {
2435                 .minorversion = session->clp->cl_minorversion,
2436         };
2437
2438         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2439         encode_compound_hdr(&xdr, req, &hdr);
2440         encode_destroy_session(&xdr, session, &hdr);
2441         encode_nops(&hdr);
2442         return 0;
2443 }
2444
2445 /*
2446  * a SEQUENCE request
2447  */
2448 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2449                                  struct nfs4_sequence_args *args)
2450 {
2451         struct xdr_stream xdr;
2452         struct compound_hdr hdr = {
2453                 .minorversion = nfs4_xdr_minorversion(args),
2454         };
2455
2456         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2457         encode_compound_hdr(&xdr, req, &hdr);
2458         encode_sequence(&xdr, args, &hdr);
2459         encode_nops(&hdr);
2460         return 0;
2461 }
2462
2463 /*
2464  * a GET_LEASE_TIME request
2465  */
2466 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2467                                        struct nfs4_get_lease_time_args *args)
2468 {
2469         struct xdr_stream xdr;
2470         struct compound_hdr hdr = {
2471                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2472         };
2473         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2474
2475         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2476         encode_compound_hdr(&xdr, req, &hdr);
2477         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2478         encode_putrootfh(&xdr, &hdr);
2479         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2480         encode_nops(&hdr);
2481         return 0;
2482 }
2483
2484 /*
2485  * a RECLAIM_COMPLETE request
2486  */
2487 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2488                                      struct nfs41_reclaim_complete_args *args)
2489 {
2490         struct xdr_stream xdr;
2491         struct compound_hdr hdr = {
2492                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2493         };
2494
2495         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2496         encode_compound_hdr(&xdr, req, &hdr);
2497         encode_sequence(&xdr, &args->seq_args, &hdr);
2498         encode_reclaim_complete(&xdr, args, &hdr);
2499         encode_nops(&hdr);
2500         return 0;
2501 }
2502
2503 #endif /* CONFIG_NFS_V4_1 */
2504
2505 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2506 {
2507         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2508                 "Remaining buffer length is %tu words.\n",
2509                 func, xdr->end - xdr->p);
2510 }
2511
2512 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2513 {
2514         __be32 *p;
2515
2516         p = xdr_inline_decode(xdr, 4);
2517         if (unlikely(!p))
2518                 goto out_overflow;
2519         *len = be32_to_cpup(p);
2520         p = xdr_inline_decode(xdr, *len);
2521         if (unlikely(!p))
2522                 goto out_overflow;
2523         *string = (char *)p;
2524         return 0;
2525 out_overflow:
2526         print_overflow_msg(__func__, xdr);
2527         return -EIO;
2528 }
2529
2530 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2531 {
2532         __be32 *p;
2533
2534         p = xdr_inline_decode(xdr, 8);
2535         if (unlikely(!p))
2536                 goto out_overflow;
2537         hdr->status = be32_to_cpup(p++);
2538         hdr->taglen = be32_to_cpup(p);
2539
2540         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2541         if (unlikely(!p))
2542                 goto out_overflow;
2543         hdr->tag = (char *)p;
2544         p += XDR_QUADLEN(hdr->taglen);
2545         hdr->nops = be32_to_cpup(p);
2546         if (unlikely(hdr->nops < 1))
2547                 return nfs4_stat_to_errno(hdr->status);
2548         return 0;
2549 out_overflow:
2550         print_overflow_msg(__func__, xdr);
2551         return -EIO;
2552 }
2553
2554 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2555 {
2556         __be32 *p;
2557         uint32_t opnum;
2558         int32_t nfserr;
2559
2560         p = xdr_inline_decode(xdr, 8);
2561         if (unlikely(!p))
2562                 goto out_overflow;
2563         opnum = be32_to_cpup(p++);
2564         if (opnum != expected) {
2565                 dprintk("nfs: Server returned operation"
2566                         " %d but we issued a request for %d\n",
2567                                 opnum, expected);
2568                 return -EIO;
2569         }
2570         nfserr = be32_to_cpup(p);
2571         if (nfserr != NFS_OK)
2572                 return nfs4_stat_to_errno(nfserr);
2573         return 0;
2574 out_overflow:
2575         print_overflow_msg(__func__, xdr);
2576         return -EIO;
2577 }
2578
2579 /* Dummy routine */
2580 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2581 {
2582         __be32 *p;
2583         unsigned int strlen;
2584         char *str;
2585
2586         p = xdr_inline_decode(xdr, 12);
2587         if (likely(p))
2588                 return decode_opaque_inline(xdr, &strlen, &str);
2589         print_overflow_msg(__func__, xdr);
2590         return -EIO;
2591 }
2592
2593 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2594 {
2595         uint32_t bmlen;
2596         __be32 *p;
2597
2598         p = xdr_inline_decode(xdr, 4);
2599         if (unlikely(!p))
2600                 goto out_overflow;
2601         bmlen = be32_to_cpup(p);
2602
2603         bitmap[0] = bitmap[1] = 0;
2604         p = xdr_inline_decode(xdr, (bmlen << 2));
2605         if (unlikely(!p))
2606                 goto out_overflow;
2607         if (bmlen > 0) {
2608                 bitmap[0] = be32_to_cpup(p++);
2609                 if (bmlen > 1)
2610                         bitmap[1] = be32_to_cpup(p);
2611         }
2612         return 0;
2613 out_overflow:
2614         print_overflow_msg(__func__, xdr);
2615         return -EIO;
2616 }
2617
2618 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2619 {
2620         __be32 *p;
2621
2622         p = xdr_inline_decode(xdr, 4);
2623         if (unlikely(!p))
2624                 goto out_overflow;
2625         *attrlen = be32_to_cpup(p);
2626         *savep = xdr->p;
2627         return 0;
2628 out_overflow:
2629         print_overflow_msg(__func__, xdr);
2630         return -EIO;
2631 }
2632
2633 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2634 {
2635         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2636                 decode_attr_bitmap(xdr, bitmask);
2637                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2638         } else
2639                 bitmask[0] = bitmask[1] = 0;
2640         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2641         return 0;
2642 }
2643
2644 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2645 {
2646         __be32 *p;
2647         int ret = 0;
2648
2649         *type = 0;
2650         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2651                 return -EIO;
2652         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2653                 p = xdr_inline_decode(xdr, 4);
2654                 if (unlikely(!p))
2655                         goto out_overflow;
2656                 *type = be32_to_cpup(p);
2657                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2658                         dprintk("%s: bad type %d\n", __func__, *type);
2659                         return -EIO;
2660                 }
2661                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2662                 ret = NFS_ATTR_FATTR_TYPE;
2663         }
2664         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2665         return ret;
2666 out_overflow:
2667         print_overflow_msg(__func__, xdr);
2668         return -EIO;
2669 }
2670
2671 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2672 {
2673         __be32 *p;
2674         int ret = 0;
2675
2676         *change = 0;
2677         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2678                 return -EIO;
2679         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2680                 p = xdr_inline_decode(xdr, 8);
2681                 if (unlikely(!p))
2682                         goto out_overflow;
2683                 xdr_decode_hyper(p, change);
2684                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2685                 ret = NFS_ATTR_FATTR_CHANGE;
2686         }
2687         dprintk("%s: change attribute=%Lu\n", __func__,
2688                         (unsigned long long)*change);
2689         return ret;
2690 out_overflow:
2691         print_overflow_msg(__func__, xdr);
2692         return -EIO;
2693 }
2694
2695 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2696 {
2697         __be32 *p;
2698         int ret = 0;
2699
2700         *size = 0;
2701         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2702                 return -EIO;
2703         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2704                 p = xdr_inline_decode(xdr, 8);
2705                 if (unlikely(!p))
2706                         goto out_overflow;
2707                 xdr_decode_hyper(p, size);
2708                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2709                 ret = NFS_ATTR_FATTR_SIZE;
2710         }
2711         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2712         return ret;
2713 out_overflow:
2714         print_overflow_msg(__func__, xdr);
2715         return -EIO;
2716 }
2717
2718 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2719 {
2720         __be32 *p;
2721
2722         *res = 0;
2723         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2724                 return -EIO;
2725         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2726                 p = xdr_inline_decode(xdr, 4);
2727                 if (unlikely(!p))
2728                         goto out_overflow;
2729                 *res = be32_to_cpup(p);
2730                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2731         }
2732         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2733         return 0;
2734 out_overflow:
2735         print_overflow_msg(__func__, xdr);
2736         return -EIO;
2737 }
2738
2739 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2740 {
2741         __be32 *p;
2742
2743         *res = 0;
2744         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2745                 return -EIO;
2746         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2747                 p = xdr_inline_decode(xdr, 4);
2748                 if (unlikely(!p))
2749                         goto out_overflow;
2750                 *res = be32_to_cpup(p);
2751                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2752         }
2753         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2754         return 0;
2755 out_overflow:
2756         print_overflow_msg(__func__, xdr);
2757         return -EIO;
2758 }
2759
2760 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2761 {
2762         __be32 *p;
2763         int ret = 0;
2764
2765         fsid->major = 0;
2766         fsid->minor = 0;
2767         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2768                 return -EIO;
2769         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2770                 p = xdr_inline_decode(xdr, 16);
2771                 if (unlikely(!p))
2772                         goto out_overflow;
2773                 p = xdr_decode_hyper(p, &fsid->major);
2774                 xdr_decode_hyper(p, &fsid->minor);
2775                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2776                 ret = NFS_ATTR_FATTR_FSID;
2777         }
2778         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2779                         (unsigned long long)fsid->major,
2780                         (unsigned long long)fsid->minor);
2781         return ret;
2782 out_overflow:
2783         print_overflow_msg(__func__, xdr);
2784         return -EIO;
2785 }
2786
2787 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2788 {
2789         __be32 *p;
2790
2791         *res = 60;
2792         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2793                 return -EIO;
2794         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2795                 p = xdr_inline_decode(xdr, 4);
2796                 if (unlikely(!p))
2797                         goto out_overflow;
2798                 *res = be32_to_cpup(p);
2799                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2800         }
2801         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2802         return 0;
2803 out_overflow:
2804         print_overflow_msg(__func__, xdr);
2805         return -EIO;
2806 }
2807
2808 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2809 {
2810         __be32 *p;
2811
2812         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2813         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2814                 return -EIO;
2815         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2816                 p = xdr_inline_decode(xdr, 4);
2817                 if (unlikely(!p))
2818                         goto out_overflow;
2819                 *res = be32_to_cpup(p);
2820                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2821         }
2822         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2823         return 0;
2824 out_overflow:
2825         print_overflow_msg(__func__, xdr);
2826         return -EIO;
2827 }
2828
2829 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2830 {
2831         __be32 *p;
2832         int ret = 0;
2833
2834         *fileid = 0;
2835         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2836                 return -EIO;
2837         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2838                 p = xdr_inline_decode(xdr, 8);
2839                 if (unlikely(!p))
2840                         goto out_overflow;
2841                 xdr_decode_hyper(p, fileid);
2842                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2843                 ret = NFS_ATTR_FATTR_FILEID;
2844         }
2845         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2846         return ret;
2847 out_overflow:
2848         print_overflow_msg(__func__, xdr);
2849         return -EIO;
2850 }
2851
2852 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2853 {
2854         __be32 *p;
2855         int ret = 0;
2856
2857         *fileid = 0;
2858         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2859                 return -EIO;
2860         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2861                 p = xdr_inline_decode(xdr, 8);
2862                 if (unlikely(!p))
2863                         goto out_overflow;
2864                 xdr_decode_hyper(p, fileid);
2865                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2866                 ret = NFS_ATTR_FATTR_FILEID;
2867         }
2868         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2869         return ret;
2870 out_overflow:
2871         print_overflow_msg(__func__, xdr);
2872         return -EIO;
2873 }
2874
2875 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2876 {
2877         __be32 *p;
2878         int status = 0;
2879
2880         *res = 0;
2881         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2882                 return -EIO;
2883         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2884                 p = xdr_inline_decode(xdr, 8);
2885                 if (unlikely(!p))
2886                         goto out_overflow;
2887                 xdr_decode_hyper(p, res);
2888                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2889         }
2890         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2891         return status;
2892 out_overflow:
2893         print_overflow_msg(__func__, xdr);
2894         return -EIO;
2895 }
2896
2897 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2898 {
2899         __be32 *p;
2900         int status = 0;
2901
2902         *res = 0;
2903         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2904                 return -EIO;
2905         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2906                 p = xdr_inline_decode(xdr, 8);
2907                 if (unlikely(!p))
2908                         goto out_overflow;
2909                 xdr_decode_hyper(p, res);
2910                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2911         }
2912         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2913         return status;
2914 out_overflow:
2915         print_overflow_msg(__func__, xdr);
2916         return -EIO;
2917 }
2918
2919 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2920 {
2921         __be32 *p;
2922         int status = 0;
2923
2924         *res = 0;
2925         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2926                 return -EIO;
2927         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2928                 p = xdr_inline_decode(xdr, 8);
2929                 if (unlikely(!p))
2930                         goto out_overflow;
2931                 xdr_decode_hyper(p, res);
2932                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2933         }
2934         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2935         return status;
2936 out_overflow:
2937         print_overflow_msg(__func__, xdr);
2938         return -EIO;
2939 }
2940
2941 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2942 {
2943         u32 n;
2944         __be32 *p;
2945         int status = 0;
2946
2947         p = xdr_inline_decode(xdr, 4);
2948         if (unlikely(!p))
2949                 goto out_overflow;
2950         n = be32_to_cpup(p);
2951         if (n == 0)
2952                 goto root_path;
2953         dprintk("path ");
2954         path->ncomponents = 0;
2955         while (path->ncomponents < n) {
2956                 struct nfs4_string *component = &path->components[path->ncomponents];
2957                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2958                 if (unlikely(status != 0))
2959                         goto out_eio;
2960                 if (path->ncomponents != n)
2961                         dprintk("/");
2962                 dprintk("%s", component->data);
2963                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2964                         path->ncomponents++;
2965                 else {
2966                         dprintk("cannot parse %d components in path\n", n);
2967                         goto out_eio;
2968                 }
2969         }
2970 out:
2971         dprintk("\n");
2972         return status;
2973 root_path:
2974 /* a root pathname is sent as a zero component4 */
2975         path->ncomponents = 1;
2976         path->components[0].len=0;
2977         path->components[0].data=NULL;
2978         dprintk("path /\n");
2979         goto out;
2980 out_eio:
2981         dprintk(" status %d", status);
2982         status = -EIO;
2983         goto out;
2984 out_overflow:
2985         print_overflow_msg(__func__, xdr);
2986         return -EIO;
2987 }
2988
2989 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2990 {
2991         int n;
2992         __be32 *p;
2993         int status = -EIO;
2994
2995         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2996                 goto out;
2997         status = 0;
2998         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2999                 goto out;
3000         dprintk("%s: fsroot ", __func__);
3001         status = decode_pathname(xdr, &res->fs_path);
3002         if (unlikely(status != 0))
3003                 goto out;
3004         p = xdr_inline_decode(xdr, 4);
3005         if (unlikely(!p))
3006                 goto out_overflow;
3007         n = be32_to_cpup(p);
3008         if (n <= 0)
3009                 goto out_eio;
3010         res->nlocations = 0;
3011         while (res->nlocations < n) {
3012                 u32 m;
3013                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3014
3015                 p = xdr_inline_decode(xdr, 4);
3016                 if (unlikely(!p))
3017                         goto out_overflow;
3018                 m = be32_to_cpup(p);
3019
3020                 loc->nservers = 0;
3021                 dprintk("%s: servers ", __func__);
3022                 while (loc->nservers < m) {
3023                         struct nfs4_string *server = &loc->servers[loc->nservers];
3024                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3025                         if (unlikely(status != 0))
3026                                 goto out_eio;
3027                         dprintk("%s ", server->data);
3028                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3029                                 loc->nservers++;
3030                         else {
3031                                 unsigned int i;
3032                                 dprintk("%s: using first %u of %u servers "
3033                                         "returned for location %u\n",
3034                                                 __func__,
3035                                                 NFS4_FS_LOCATION_MAXSERVERS,
3036                                                 m, res->nlocations);
3037                                 for (i = loc->nservers; i < m; i++) {
3038                                         unsigned int len;
3039                                         char *data;
3040                                         status = decode_opaque_inline(xdr, &len, &data);
3041                                         if (unlikely(status != 0))
3042                                                 goto out_eio;
3043                                 }
3044                         }
3045                 }
3046                 status = decode_pathname(xdr, &loc->rootpath);
3047                 if (unlikely(status != 0))
3048                         goto out_eio;
3049                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3050                         res->nlocations++;
3051         }
3052         if (res->nlocations != 0)
3053                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3054 out:
3055         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3056         return status;
3057 out_overflow:
3058         print_overflow_msg(__func__, xdr);
3059 out_eio:
3060         status = -EIO;
3061         goto out;
3062 }
3063
3064 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3065 {
3066         __be32 *p;
3067         int status = 0;
3068
3069         *res = 0;
3070         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3071                 return -EIO;
3072         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3073                 p = xdr_inline_decode(xdr, 8);
3074                 if (unlikely(!p))
3075                         goto out_overflow;
3076                 xdr_decode_hyper(p, res);
3077                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3078         }
3079         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3080         return status;
3081 out_overflow:
3082         print_overflow_msg(__func__, xdr);
3083         return -EIO;
3084 }
3085
3086 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3087 {
3088         __be32 *p;
3089         int status = 0;
3090
3091         *maxlink = 1;
3092         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3093                 return -EIO;
3094         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3095                 p = xdr_inline_decode(xdr, 4);
3096                 if (unlikely(!p))
3097                         goto out_overflow;
3098                 *maxlink = be32_to_cpup(p);
3099                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3100         }
3101         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3102         return status;
3103 out_overflow:
3104         print_overflow_msg(__func__, xdr);
3105         return -EIO;
3106 }
3107
3108 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3109 {
3110         __be32 *p;
3111         int status = 0;
3112
3113         *maxname = 1024;
3114         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3115                 return -EIO;
3116         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3117                 p = xdr_inline_decode(xdr, 4);
3118                 if (unlikely(!p))
3119                         goto out_overflow;
3120                 *maxname = be32_to_cpup(p);
3121                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3122         }
3123         dprintk("%s: maxname=%u\n", __func__, *maxname);
3124         return status;
3125 out_overflow:
3126         print_overflow_msg(__func__, xdr);
3127         return -EIO;
3128 }
3129
3130 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3131 {
3132         __be32 *p;
3133         int status = 0;
3134
3135         *res = 1024;
3136         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3137                 return -EIO;
3138         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3139                 uint64_t maxread;
3140                 p = xdr_inline_decode(xdr, 8);
3141                 if (unlikely(!p))
3142                         goto out_overflow;
3143                 xdr_decode_hyper(p, &maxread);
3144                 if (maxread > 0x7FFFFFFF)
3145                         maxread = 0x7FFFFFFF;
3146                 *res = (uint32_t)maxread;
3147                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3148         }
3149         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3150         return status;
3151 out_overflow:
3152         print_overflow_msg(__func__, xdr);
3153         return -EIO;
3154 }
3155
3156 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3157 {
3158         __be32 *p;
3159         int status = 0;
3160
3161         *res = 1024;
3162         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3163                 return -EIO;
3164         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3165                 uint64_t maxwrite;
3166                 p = xdr_inline_decode(xdr, 8);
3167                 if (unlikely(!p))
3168                         goto out_overflow;
3169                 xdr_decode_hyper(p, &maxwrite);
3170                 if (maxwrite > 0x7FFFFFFF)
3171                         maxwrite = 0x7FFFFFFF;
3172                 *res = (uint32_t)maxwrite;
3173                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3174         }
3175         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3176         return status;
3177 out_overflow:
3178         print_overflow_msg(__func__, xdr);
3179         return -EIO;
3180 }
3181
3182 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3183 {
3184         uint32_t tmp;
3185         __be32 *p;
3186         int ret = 0;
3187
3188         *mode = 0;
3189         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3190                 return -EIO;
3191         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3192                 p = xdr_inline_decode(xdr, 4);
3193                 if (unlikely(!p))
3194                         goto out_overflow;
3195                 tmp = be32_to_cpup(p);
3196                 *mode = tmp & ~S_IFMT;
3197                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3198                 ret = NFS_ATTR_FATTR_MODE;
3199         }
3200         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3201         return ret;
3202 out_overflow:
3203         print_overflow_msg(__func__, xdr);
3204         return -EIO;
3205 }
3206
3207 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3208 {
3209         __be32 *p;
3210         int ret = 0;
3211
3212         *nlink = 1;
3213         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3214                 return -EIO;
3215         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3216                 p = xdr_inline_decode(xdr, 4);
3217                 if (unlikely(!p))
3218                         goto out_overflow;
3219                 *nlink = be32_to_cpup(p);
3220                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3221                 ret = NFS_ATTR_FATTR_NLINK;
3222         }
3223         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3224         return ret;
3225 out_overflow:
3226         print_overflow_msg(__func__, xdr);
3227         return -EIO;
3228 }
3229
3230 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3231                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3232 {
3233         uint32_t len;
3234         __be32 *p;
3235         int ret = 0;
3236
3237         *uid = -2;
3238         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3239                 return -EIO;
3240         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3241                 p = xdr_inline_decode(xdr, 4);
3242                 if (unlikely(!p))
3243                         goto out_overflow;
3244                 len = be32_to_cpup(p);
3245                 p = xdr_inline_decode(xdr, len);
3246                 if (unlikely(!p))
3247                         goto out_overflow;
3248                 if (!may_sleep) {
3249                         /* do nothing */
3250                 } else if (len < XDR_MAX_NETOBJ) {
3251                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3252                                 ret = NFS_ATTR_FATTR_OWNER;
3253                         else
3254                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3255                                                 __func__);
3256                 } else
3257                         dprintk("%s: name too long (%u)!\n",
3258                                         __func__, len);
3259                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3260         }
3261         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3262         return ret;
3263 out_overflow:
3264         print_overflow_msg(__func__, xdr);
3265         return -EIO;
3266 }
3267
3268 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3269                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3270 {
3271         uint32_t len;
3272         __be32 *p;
3273         int ret = 0;
3274
3275         *gid = -2;
3276         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3277                 return -EIO;
3278         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3279                 p = xdr_inline_decode(xdr, 4);
3280                 if (unlikely(!p))
3281                         goto out_overflow;
3282                 len = be32_to_cpup(p);
3283                 p = xdr_inline_decode(xdr, len);
3284                 if (unlikely(!p))
3285                         goto out_overflow;
3286                 if (!may_sleep) {
3287                         /* do nothing */
3288                 } else if (len < XDR_MAX_NETOBJ) {
3289                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3290                                 ret = NFS_ATTR_FATTR_GROUP;
3291                         else
3292                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3293                                                 __func__);
3294                 } else
3295                         dprintk("%s: name too long (%u)!\n",
3296                                         __func__, len);
3297                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3298         }
3299         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3300         return ret;
3301 out_overflow:
3302         print_overflow_msg(__func__, xdr);
3303         return -EIO;
3304 }
3305
3306 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3307 {
3308         uint32_t major = 0, minor = 0;
3309         __be32 *p;
3310         int ret = 0;
3311
3312         *rdev = MKDEV(0,0);
3313         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3314                 return -EIO;
3315         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3316                 dev_t tmp;
3317
3318                 p = xdr_inline_decode(xdr, 8);
3319                 if (unlikely(!p))
3320                         goto out_overflow;
3321                 major = be32_to_cpup(p++);
3322                 minor = be32_to_cpup(p);
3323                 tmp = MKDEV(major, minor);
3324                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3325                         *rdev = tmp;
3326                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3327                 ret = NFS_ATTR_FATTR_RDEV;
3328         }
3329         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3330         return ret;
3331 out_overflow:
3332         print_overflow_msg(__func__, xdr);
3333         return -EIO;
3334 }
3335
3336 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3337 {
3338         __be32 *p;
3339         int status = 0;
3340
3341         *res = 0;
3342         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3343                 return -EIO;
3344         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3345                 p = xdr_inline_decode(xdr, 8);
3346                 if (unlikely(!p))
3347                         goto out_overflow;
3348                 xdr_decode_hyper(p, res);
3349                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3350         }
3351         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3352         return status;
3353 out_overflow:
3354         print_overflow_msg(__func__, xdr);
3355         return -EIO;
3356 }
3357
3358 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3359 {
3360         __be32 *p;
3361         int status = 0;
3362
3363         *res = 0;
3364         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3365                 return -EIO;
3366         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3367                 p = xdr_inline_decode(xdr, 8);
3368                 if (unlikely(!p))
3369                         goto out_overflow;
3370                 xdr_decode_hyper(p, res);
3371                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3372         }
3373         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3374         return status;
3375 out_overflow:
3376         print_overflow_msg(__func__, xdr);
3377         return -EIO;
3378 }
3379
3380 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3381 {
3382         __be32 *p;
3383         int status = 0;
3384
3385         *res = 0;
3386         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3387                 return -EIO;
3388         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3389                 p = xdr_inline_decode(xdr, 8);
3390                 if (unlikely(!p))
3391                         goto out_overflow;
3392                 xdr_decode_hyper(p, res);
3393                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3394         }
3395         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3396         return status;
3397 out_overflow:
3398         print_overflow_msg(__func__, xdr);
3399         return -EIO;
3400 }
3401
3402 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3403 {
3404         __be32 *p;
3405         int ret = 0;
3406
3407         *used = 0;
3408         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3409                 return -EIO;
3410         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3411                 p = xdr_inline_decode(xdr, 8);
3412                 if (unlikely(!p))
3413                         goto out_overflow;
3414                 xdr_decode_hyper(p, used);
3415                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3416                 ret = NFS_ATTR_FATTR_SPACE_USED;
3417         }
3418         dprintk("%s: space used=%Lu\n", __func__,
3419                         (unsigned long long)*used);
3420         return ret;
3421 out_overflow:
3422         print_overflow_msg(__func__, xdr);
3423         return -EIO;
3424 }
3425
3426 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3427 {
3428         __be32 *p;
3429         uint64_t sec;
3430         uint32_t nsec;
3431
3432         p = xdr_inline_decode(xdr, 12);
3433         if (unlikely(!p))
3434                 goto out_overflow;
3435         p = xdr_decode_hyper(p, &sec);
3436         nsec = be32_to_cpup(p);
3437         time->tv_sec = (time_t)sec;
3438         time->tv_nsec = (long)nsec;
3439         return 0;
3440 out_overflow:
3441         print_overflow_msg(__func__, xdr);
3442         return -EIO;
3443 }
3444
3445 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3446 {
3447         int status = 0;
3448
3449         time->tv_sec = 0;
3450         time->tv_nsec = 0;
3451         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3452                 return -EIO;
3453         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3454                 status = decode_attr_time(xdr, time);
3455                 if (status == 0)
3456                         status = NFS_ATTR_FATTR_ATIME;
3457                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3458         }
3459         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3460         return status;
3461 }
3462
3463 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3464 {
3465         int status = 0;
3466
3467         time->tv_sec = 0;
3468         time->tv_nsec = 0;
3469         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3472                 status = decode_attr_time(xdr, time);
3473                 if (status == 0)
3474                         status = NFS_ATTR_FATTR_CTIME;
3475                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3476         }
3477         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3478         return status;
3479 }
3480
3481 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3482 {
3483         int status = 0;
3484
3485         time->tv_sec = 0;
3486         time->tv_nsec = 0;
3487         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3488                 return -EIO;
3489         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3490                 status = decode_attr_time(xdr, time);
3491                 if (status == 0)
3492                         status = NFS_ATTR_FATTR_MTIME;
3493                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3494         }
3495         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3496         return status;
3497 }
3498
3499 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3500 {
3501         unsigned int attrwords = XDR_QUADLEN(attrlen);
3502         unsigned int nwords = xdr->p - savep;
3503
3504         if (unlikely(attrwords != nwords)) {
3505                 dprintk("%s: server returned incorrect attribute length: "
3506                         "%u %c %u\n",
3507                                 __func__,
3508                                 attrwords << 2,
3509                                 (attrwords < nwords) ? '<' : '>',
3510                                 nwords << 2);
3511                 return -EIO;
3512         }
3513         return 0;
3514 }
3515
3516 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3517 {
3518         __be32 *p;
3519
3520         p = xdr_inline_decode(xdr, 20);
3521         if (unlikely(!p))
3522                 goto out_overflow;
3523         cinfo->atomic = be32_to_cpup(p++);
3524         p = xdr_decode_hyper(p, &cinfo->before);
3525         xdr_decode_hyper(p, &cinfo->after);
3526         return 0;
3527 out_overflow:
3528         print_overflow_msg(__func__, xdr);
3529         return -EIO;
3530 }
3531
3532 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3533 {
3534         __be32 *p;
3535         uint32_t supp, acc;
3536         int status;
3537
3538         status = decode_op_hdr(xdr, OP_ACCESS);
3539         if (status)
3540                 return status;
3541         p = xdr_inline_decode(xdr, 8);
3542         if (unlikely(!p))
3543                 goto out_overflow;
3544         supp = be32_to_cpup(p++);
3545         acc = be32_to_cpup(p);
3546         access->supported = supp;
3547         access->access = acc;
3548         return 0;
3549 out_overflow:
3550         print_overflow_msg(__func__, xdr);
3551         return -EIO;
3552 }
3553
3554 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3555 {
3556         __be32 *p;
3557
3558         p = xdr_inline_decode(xdr, len);
3559         if (likely(p)) {
3560                 memcpy(buf, p, len);
3561                 return 0;
3562         }
3563         print_overflow_msg(__func__, xdr);
3564         return -EIO;
3565 }
3566
3567 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3568 {
3569         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3570 }
3571
3572 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3573 {
3574         int status;
3575
3576         status = decode_op_hdr(xdr, OP_CLOSE);
3577         if (status != -EIO)
3578                 nfs_increment_open_seqid(status, res->seqid);
3579         if (!status)
3580                 status = decode_stateid(xdr, &res->stateid);
3581         return status;
3582 }
3583
3584 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3585 {
3586         return decode_opaque_fixed(xdr, verifier, 8);
3587 }
3588
3589 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3590 {
3591         int status;
3592
3593         status = decode_op_hdr(xdr, OP_COMMIT);
3594         if (!status)
3595                 status = decode_verifier(xdr, res->verf->verifier);
3596         return status;
3597 }
3598
3599 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3600 {
3601         __be32 *p;
3602         uint32_t bmlen;
3603         int status;
3604
3605         status = decode_op_hdr(xdr, OP_CREATE);
3606         if (status)
3607                 return status;
3608         if ((status = decode_change_info(xdr, cinfo)))
3609                 return status;
3610         p = xdr_inline_decode(xdr, 4);
3611         if (unlikely(!p))
3612                 goto out_overflow;
3613         bmlen = be32_to_cpup(p);
3614         p = xdr_inline_decode(xdr, bmlen << 2);
3615         if (likely(p))
3616                 return 0;
3617 out_overflow:
3618         print_overflow_msg(__func__, xdr);
3619         return -EIO;
3620 }
3621
3622 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3623 {
3624         __be32 *savep;
3625         uint32_t attrlen, bitmap[2] = {0};
3626         int status;
3627
3628         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3629                 goto xdr_error;
3630         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3631                 goto xdr_error;
3632         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3633                 goto xdr_error;
3634         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3635                 goto xdr_error;
3636         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3637                 goto xdr_error;
3638         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3639                 goto xdr_error;
3640         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3641                 goto xdr_error;
3642         status = verify_attr_len(xdr, savep, attrlen);
3643 xdr_error:
3644         dprintk("%s: xdr returned %d!\n", __func__, -status);
3645         return status;
3646 }
3647
3648 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3649 {
3650         __be32 *savep;
3651         uint32_t attrlen, bitmap[2] = {0};
3652         int status;
3653
3654         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3655                 goto xdr_error;
3656         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3657                 goto xdr_error;
3658         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3659                 goto xdr_error;
3660
3661         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3662                 goto xdr_error;
3663         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3664                 goto xdr_error;
3665         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3666                 goto xdr_error;
3667         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3668                 goto xdr_error;
3669         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3670                 goto xdr_error;
3671         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3672                 goto xdr_error;
3673
3674         status = verify_attr_len(xdr, savep, attrlen);
3675 xdr_error:
3676         dprintk("%s: xdr returned %d!\n", __func__, -status);
3677         return status;
3678 }
3679
3680 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3681 {
3682         __be32 *savep;
3683         uint32_t attrlen, bitmap[2] = {0};
3684         int status;
3685
3686         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3687                 goto xdr_error;
3688         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3689                 goto xdr_error;
3690         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3691                 goto xdr_error;
3692
3693         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3694                 goto xdr_error;
3695         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3696                 goto xdr_error;
3697
3698         status = verify_attr_len(xdr, savep, attrlen);
3699 xdr_error:
3700         dprintk("%s: xdr returned %d!\n", __func__, -status);
3701         return status;
3702 }
3703
3704 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3705                 const struct nfs_server *server, int may_sleep)
3706 {
3707         __be32 *savep;
3708         uint32_t attrlen,
3709                  bitmap[2] = {0},
3710                  type;
3711         int status;
3712         umode_t fmode = 0;
3713         uint64_t fileid;
3714
3715         status = decode_op_hdr(xdr, OP_GETATTR);
3716         if (status < 0)
3717                 goto xdr_error;
3718
3719         status = decode_attr_bitmap(xdr, bitmap);
3720         if (status < 0)
3721                 goto xdr_error;
3722
3723         status = decode_attr_length(xdr, &attrlen, &savep);
3724         if (status < 0)
3725                 goto xdr_error;
3726
3727
3728         status = decode_attr_type(xdr, bitmap, &type);
3729         if (status < 0)
3730                 goto xdr_error;
3731         fattr->mode = 0;
3732         if (status != 0) {
3733                 fattr->mode |= nfs_type2fmt[type];
3734                 fattr->valid |= status;
3735         }
3736
3737         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3738         if (status < 0)
3739                 goto xdr_error;
3740         fattr->valid |= status;
3741
3742         status = decode_attr_size(xdr, bitmap, &fattr->size);
3743         if (status < 0)
3744                 goto xdr_error;
3745         fattr->valid |= status;
3746
3747         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3748         if (status < 0)
3749                 goto xdr_error;
3750         fattr->valid |= status;
3751
3752         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3753         if (status < 0)
3754                 goto xdr_error;
3755         fattr->valid |= status;
3756
3757         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3758                                                 struct nfs4_fs_locations,
3759                                                 fattr));
3760         if (status < 0)
3761                 goto xdr_error;
3762         fattr->valid |= status;
3763
3764         status = decode_attr_mode(xdr, bitmap, &fmode);
3765         if (status < 0)
3766                 goto xdr_error;
3767         if (status != 0) {
3768                 fattr->mode |= fmode;
3769                 fattr->valid |= status;
3770         }
3771
3772         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3773         if (status < 0)
3774                 goto xdr_error;
3775         fattr->valid |= status;
3776
3777         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3778                         &fattr->uid, may_sleep);
3779         if (status < 0)
3780                 goto xdr_error;
3781         fattr->valid |= status;
3782
3783         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3784                         &fattr->gid, may_sleep);
3785         if (status < 0)
3786                 goto xdr_error;
3787         fattr->valid |= status;
3788
3789         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3790         if (status < 0)
3791                 goto xdr_error;
3792         fattr->valid |= status;
3793
3794         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3795         if (status < 0)
3796                 goto xdr_error;
3797         fattr->valid |= status;
3798
3799         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3800         if (status < 0)
3801                 goto xdr_error;
3802         fattr->valid |= status;
3803
3804         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3805         if (status < 0)
3806                 goto xdr_error;
3807         fattr->valid |= status;
3808
3809         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3810         if (status < 0)
3811                 goto xdr_error;
3812         fattr->valid |= status;
3813
3814         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3815         if (status < 0)
3816                 goto xdr_error;
3817         if (status != 0 && !(fattr->valid & status)) {
3818                 fattr->fileid = fileid;
3819                 fattr->valid |= status;
3820         }
3821
3822         status = verify_attr_len(xdr, savep, attrlen);
3823 xdr_error:
3824         dprintk("%s: xdr returned %d\n", __func__, -status);
3825         return status;
3826 }
3827
3828
3829 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3830 {
3831         __be32 *savep;
3832         uint32_t attrlen, bitmap[2];
3833         int status;
3834
3835         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3836                 goto xdr_error;
3837         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3838                 goto xdr_error;
3839         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3840                 goto xdr_error;
3841
3842         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3843
3844         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3845                 goto xdr_error;
3846         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3847                 goto xdr_error;
3848         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3849                 goto xdr_error;
3850         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3851         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3852                 goto xdr_error;
3853         fsinfo->wtpref = fsinfo->wtmax;
3854
3855         status = verify_attr_len(xdr, savep, attrlen);
3856 xdr_error:
3857         dprintk("%s: xdr returned %d!\n", __func__, -status);
3858         return status;
3859 }
3860
3861 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3862 {
3863         __be32 *p;
3864         uint32_t len;
3865         int status;
3866
3867         /* Zero handle first to allow comparisons */
3868         memset(fh, 0, sizeof(*fh));
3869
3870         status = decode_op_hdr(xdr, OP_GETFH);
3871         if (status)
3872                 return status;
3873
3874         p = xdr_inline_decode(xdr, 4);
3875         if (unlikely(!p))
3876                 goto out_overflow;
3877         len = be32_to_cpup(p);
3878         if (len > NFS4_FHSIZE)
3879                 return -EIO;
3880         fh->size = len;
3881         p = xdr_inline_decode(xdr, len);
3882         if (unlikely(!p))
3883                 goto out_overflow;
3884         memcpy(fh->data, p, len);
3885         return 0;
3886 out_overflow:
3887         print_overflow_msg(__func__, xdr);
3888         return -EIO;
3889 }
3890
3891 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3892 {
3893         int status;
3894
3895         status = decode_op_hdr(xdr, OP_LINK);
3896         if (status)
3897                 return status;
3898         return decode_change_info(xdr, cinfo);
3899 }
3900
3901 /*
3902  * We create the owner, so we know a proper owner.id length is 4.
3903  */
3904 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3905 {
3906         uint64_t offset, length, clientid;
3907         __be32 *p;
3908         uint32_t namelen, type;
3909
3910         p = xdr_inline_decode(xdr, 32);
3911         if (unlikely(!p))
3912                 goto out_overflow;
3913         p = xdr_decode_hyper(p, &offset);
3914         p = xdr_decode_hyper(p, &length);
3915         type = be32_to_cpup(p++);
3916         if (fl != NULL) {
3917                 fl->fl_start = (loff_t)offset;
3918                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3919                 if (length == ~(uint64_t)0)
3920                         fl->fl_end = OFFSET_MAX;
3921                 fl->fl_type = F_WRLCK;
3922                 if (type & 1)
3923                         fl->fl_type = F_RDLCK;
3924                 fl->fl_pid = 0;
3925         }
3926         p = xdr_decode_hyper(p, &clientid);
3927         namelen = be32_to_cpup(p);
3928         p = xdr_inline_decode(xdr, namelen);
3929         if (likely(p))
3930                 return -NFS4ERR_DENIED;
3931 out_overflow:
3932         print_overflow_msg(__func__, xdr);
3933         return -EIO;
3934 }
3935
3936 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3937 {
3938         int status;
3939
3940         status = decode_op_hdr(xdr, OP_LOCK);
3941         if (status == -EIO)
3942                 goto out;
3943         if (status == 0) {
3944                 status = decode_stateid(xdr, &res->stateid);
3945                 if (unlikely(status))
3946                         goto out;
3947         } else if (status == -NFS4ERR_DENIED)
3948                 status = decode_lock_denied(xdr, NULL);
3949         if (res->open_seqid != NULL)
3950                 nfs_increment_open_seqid(status, res->open_seqid);
3951         nfs_increment_lock_seqid(status, res->lock_seqid);
3952 out:
3953         return status;
3954 }
3955
3956 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3957 {
3958         int status;
3959         status = decode_op_hdr(xdr, OP_LOCKT);
3960         if (status == -NFS4ERR_DENIED)
3961                 return decode_lock_denied(xdr, res->denied);
3962         return status;
3963 }
3964
3965 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3966 {
3967         int status;
3968
3969         status = decode_op_hdr(xdr, OP_LOCKU);
3970         if (status != -EIO)
3971                 nfs_increment_lock_seqid(status, res->seqid);
3972         if (status == 0)
3973                 status = decode_stateid(xdr, &res->stateid);
3974         return status;
3975 }
3976
3977 static int decode_lookup(struct xdr_stream *xdr)
3978 {
3979         return decode_op_hdr(xdr, OP_LOOKUP);
3980 }
3981
3982 /* This is too sick! */
3983 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3984 {
3985         __be32 *p;
3986         uint32_t limit_type, nblocks, blocksize;
3987
3988         p = xdr_inline_decode(xdr, 12);
3989         if (unlikely(!p))
3990                 goto out_overflow;
3991         limit_type = be32_to_cpup(p++);
3992         switch (limit_type) {
3993         case 1:
3994                 xdr_decode_hyper(p, maxsize);
3995                 break;
3996         case 2:
3997                 nblocks = be32_to_cpup(p++);
3998                 blocksize = be32_to_cpup(p);
3999                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4000         }
4001         return 0;
4002 out_overflow:
4003         print_overflow_msg(__func__, xdr);
4004         return -EIO;
4005 }
4006
4007 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4008 {
4009         __be32 *p;
4010         uint32_t delegation_type;
4011         int status;
4012
4013         p = xdr_inline_decode(xdr, 4);
4014         if (unlikely(!p))
4015                 goto out_overflow;
4016         delegation_type = be32_to_cpup(p);
4017         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4018                 res->delegation_type = 0;
4019                 return 0;
4020         }
4021         status = decode_stateid(xdr, &res->delegation);
4022         if (unlikely(status))
4023                 return status;
4024         p = xdr_inline_decode(xdr, 4);
4025         if (unlikely(!p))
4026                 goto out_overflow;
4027         res->do_recall = be32_to_cpup(p);
4028
4029         switch (delegation_type) {
4030         case NFS4_OPEN_DELEGATE_READ:
4031                 res->delegation_type = FMODE_READ;
4032                 break;
4033         case NFS4_OPEN_DELEGATE_WRITE:
4034                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4035                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4036                                 return -EIO;
4037         }
4038         return decode_ace(xdr, NULL, res->server->nfs_client);
4039 out_overflow:
4040         print_overflow_msg(__func__, xdr);
4041         return -EIO;
4042 }
4043
4044 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4045 {
4046         __be32 *p;
4047         uint32_t savewords, bmlen, i;
4048         int status;
4049
4050         status = decode_op_hdr(xdr, OP_OPEN);
4051         if (status != -EIO)
4052                 nfs_increment_open_seqid(status, res->seqid);
4053         if (!status)
4054                 status = decode_stateid(xdr, &res->stateid);
4055         if (unlikely(status))
4056                 return status;
4057
4058         decode_change_info(xdr, &res->cinfo);
4059
4060         p = xdr_inline_decode(xdr, 8);
4061         if (unlikely(!p))
4062                 goto out_overflow;
4063         res->rflags = be32_to_cpup(p++);
4064         bmlen = be32_to_cpup(p);
4065         if (bmlen > 10)
4066                 goto xdr_error;
4067
4068         p = xdr_inline_decode(xdr, bmlen << 2);
4069         if (unlikely(!p))
4070                 goto out_overflow;
4071         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4072         for (i = 0; i < savewords; ++i)
4073                 res->attrset[i] = be32_to_cpup(p++);
4074         for (; i < NFS4_BITMAP_SIZE; i++)
4075                 res->attrset[i] = 0;
4076
4077         return decode_delegation(xdr, res);
4078 xdr_error:
4079         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4080         return -EIO;
4081 out_overflow:
4082         print_overflow_msg(__func__, xdr);
4083         return -EIO;
4084 }
4085
4086 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4087 {
4088         int status;
4089
4090         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4091         if (status != -EIO)
4092                 nfs_increment_open_seqid(status, res->seqid);
4093         if (!status)
4094                 status = decode_stateid(xdr, &res->stateid);
4095         return status;
4096 }
4097
4098 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4099 {
4100         int status;
4101
4102         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4103         if (status != -EIO)
4104                 nfs_increment_open_seqid(status, res->seqid);
4105         if (!status)
4106                 status = decode_stateid(xdr, &res->stateid);
4107         return status;
4108 }
4109
4110 static int decode_putfh(struct xdr_stream *xdr)
4111 {
4112         return decode_op_hdr(xdr, OP_PUTFH);
4113 }
4114
4115 static int decode_putrootfh(struct xdr_stream *xdr)
4116 {
4117         return decode_op_hdr(xdr, OP_PUTROOTFH);
4118 }
4119
4120 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4121 {
4122         struct kvec *iov = req->rq_rcv_buf.head;
4123         __be32 *p;
4124         uint32_t count, eof, recvd, hdrlen;
4125         int status;
4126
4127         status = decode_op_hdr(xdr, OP_READ);
4128         if (status)
4129                 return status;
4130         p = xdr_inline_decode(xdr, 8);
4131         if (unlikely(!p))
4132                 goto out_overflow;
4133         eof = be32_to_cpup(p++);
4134         count = be32_to_cpup(p);
4135         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4136         recvd = req->rq_rcv_buf.len - hdrlen;
4137         if (count > recvd) {
4138                 dprintk("NFS: server cheating in read reply: "
4139                                 "count %u > recvd %u\n", count, recvd);
4140                 count = recvd;
4141                 eof = 0;
4142         }
4143         xdr_read_pages(xdr, count);
4144         res->eof = eof;
4145         res->count = count;
4146         return 0;
4147 out_overflow:
4148         print_overflow_msg(__func__, xdr);
4149         return -EIO;
4150 }
4151
4152 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4153 {
4154         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4155         struct page     *page = *rcvbuf->pages;
4156         struct kvec     *iov = rcvbuf->head;
4157         size_t          hdrlen;
4158         u32             recvd, pglen = rcvbuf->page_len;
4159         __be32          *end, *entry, *p, *kaddr;
4160         unsigned int    nr = 0;
4161         int             status;
4162
4163         status = decode_op_hdr(xdr, OP_READDIR);
4164         if (!status)
4165                 status = decode_verifier(xdr, readdir->verifier.data);
4166         if (unlikely(status))
4167                 return status;
4168         dprintk("%s: verifier = %08x:%08x\n",
4169                         __func__,
4170                         ((u32 *)readdir->verifier.data)[0],
4171                         ((u32 *)readdir->verifier.data)[1]);
4172
4173
4174         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4175         recvd = rcvbuf->len - hdrlen;
4176         if (pglen > recvd)
4177                 pglen = recvd;
4178         xdr_read_pages(xdr, pglen);
4179
4180         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
4181         kaddr = p = kmap_atomic(page, KM_USER0);
4182         end = p + ((pglen + readdir->pgbase) >> 2);
4183         entry = p;
4184
4185         /* Make sure the packet actually has a value_follows and EOF entry */
4186         if ((entry + 1) > end)
4187                 goto short_pkt;
4188
4189         for (; *p++; nr++) {
4190                 u32 len, attrlen, xlen;
4191                 if (end - p < 3)
4192                         goto short_pkt;
4193                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
4194                 p += 2;                 /* cookie */
4195                 len = ntohl(*p++);      /* filename length */
4196                 if (len > NFS4_MAXNAMLEN) {
4197                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
4198                                         len);
4199                         goto err_unmap;
4200                 }
4201                 xlen = XDR_QUADLEN(len);
4202                 if (end - p < xlen + 1)
4203                         goto short_pkt;
4204                 dprintk("filename = %*s\n", len, (char *)p);
4205                 p += xlen;
4206                 len = ntohl(*p++);      /* bitmap length */
4207                 if (end - p < len + 1)
4208                         goto short_pkt;
4209                 p += len;
4210                 attrlen = XDR_QUADLEN(ntohl(*p++));
4211                 if (end - p < attrlen + 2)
4212                         goto short_pkt;
4213                 p += attrlen;           /* attributes */
4214                 entry = p;
4215         }
4216         /*
4217          * Apparently some server sends responses that are a valid size, but
4218          * contain no entries, and have value_follows==0 and EOF==0. For
4219          * those, just set the EOF marker.
4220          */
4221         if (!nr && entry[1] == 0) {
4222                 dprintk("NFS: readdir reply truncated!\n");
4223                 entry[1] = 1;
4224         }
4225 out:
4226         kunmap_atomic(kaddr, KM_USER0);
4227         return 0;
4228 short_pkt:
4229         /*
4230          * When we get a short packet there are 2 possibilities. We can
4231          * return an error, or fix up the response to look like a valid
4232          * response and return what we have so far. If there are no
4233          * entries and the packet was short, then return -EIO. If there
4234          * are valid entries in the response, return them and pretend that
4235          * the call was successful, but incomplete. The caller can retry the
4236          * readdir starting at the last cookie.
4237          */
4238         dprintk("%s: short packet at entry %d\n", __func__, nr);
4239         entry[0] = entry[1] = 0;
4240         if (nr)
4241                 goto out;
4242 err_unmap:
4243         kunmap_atomic(kaddr, KM_USER0);
4244         return -errno_NFSERR_IO;
4245 }
4246
4247 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4248 {
4249         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4250         struct kvec *iov = rcvbuf->head;
4251         size_t hdrlen;
4252         u32 len, recvd;
4253         __be32 *p;
4254         char *kaddr;
4255         int status;
4256
4257         status = decode_op_hdr(xdr, OP_READLINK);
4258         if (status)
4259                 return status;
4260
4261         /* Convert length of symlink */
4262         p = xdr_inline_decode(xdr, 4);
4263         if (unlikely(!p))
4264                 goto out_overflow;
4265         len = be32_to_cpup(p);
4266         if (len >= rcvbuf->page_len || len <= 0) {
4267                 dprintk("nfs: server returned giant symlink!\n");
4268                 return -ENAMETOOLONG;
4269         }
4270         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4271         recvd = req->rq_rcv_buf.len - hdrlen;
4272         if (recvd < len) {
4273                 dprintk("NFS: server cheating in readlink reply: "
4274                                 "count %u > recvd %u\n", len, recvd);
4275                 return -EIO;
4276         }
4277         xdr_read_pages(xdr, len);
4278         /*
4279          * The XDR encode routine has set things up so that
4280          * the link text will be copied directly into the
4281          * buffer.  We just have to do overflow-checking,
4282          * and and null-terminate the text (the VFS expects
4283          * null-termination).
4284          */
4285         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
4286         kaddr[len+rcvbuf->page_base] = '\0';
4287         kunmap_atomic(kaddr, KM_USER0);
4288         return 0;
4289 out_overflow:
4290         print_overflow_msg(__func__, xdr);
4291         return -EIO;
4292 }
4293
4294 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4295 {
4296         int status;
4297
4298         status = decode_op_hdr(xdr, OP_REMOVE);
4299         if (status)
4300                 goto out;
4301         status = decode_change_info(xdr, cinfo);
4302 out:
4303         return status;
4304 }
4305
4306 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4307               struct nfs4_change_info *new_cinfo)
4308 {
4309         int status;
4310
4311         status = decode_op_hdr(xdr, OP_RENAME);
4312         if (status)
4313                 goto out;
4314         if ((status = decode_change_info(xdr, old_cinfo)))
4315                 goto out;
4316         status = decode_change_info(xdr, new_cinfo);
4317 out:
4318         return status;
4319 }
4320
4321 static int decode_renew(struct xdr_stream *xdr)
4322 {
4323         return decode_op_hdr(xdr, OP_RENEW);
4324 }
4325
4326 static int
4327 decode_restorefh(struct xdr_stream *xdr)
4328 {
4329         return decode_op_hdr(xdr, OP_RESTOREFH);
4330 }
4331
4332 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4333                 size_t *acl_len)
4334 {
4335         __be32 *savep;
4336         uint32_t attrlen,
4337                  bitmap[2] = {0};
4338         struct kvec *iov = req->rq_rcv_buf.head;
4339         int status;
4340
4341         *acl_len = 0;
4342         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4343                 goto out;
4344         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4345                 goto out;
4346         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4347                 goto out;
4348
4349         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4350                 return -EIO;
4351         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4352                 size_t hdrlen;
4353                 u32 recvd;
4354
4355                 /* We ignore &savep and don't do consistency checks on
4356                  * the attr length.  Let userspace figure it out.... */
4357                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4358                 recvd = req->rq_rcv_buf.len - hdrlen;
4359                 if (attrlen > recvd) {
4360                         dprintk("NFS: server cheating in getattr"
4361                                         " acl reply: attrlen %u > recvd %u\n",
4362                                         attrlen, recvd);
4363                         return -EINVAL;
4364                 }
4365                 xdr_read_pages(xdr, attrlen);
4366                 *acl_len = attrlen;
4367         } else
4368                 status = -EOPNOTSUPP;
4369
4370 out:
4371         return status;
4372 }
4373
4374 static int
4375 decode_savefh(struct xdr_stream *xdr)
4376 {
4377         return decode_op_hdr(xdr, OP_SAVEFH);
4378 }
4379
4380 static int decode_setattr(struct xdr_stream *xdr)
4381 {
4382         __be32 *p;
4383         uint32_t bmlen;
4384         int status;
4385
4386         status = decode_op_hdr(xdr, OP_SETATTR);
4387         if (status)
4388                 return status;
4389         p = xdr_inline_decode(xdr, 4);
4390         if (unlikely(!p))
4391                 goto out_overflow;
4392         bmlen = be32_to_cpup(p);
4393         p = xdr_inline_decode(xdr, bmlen << 2);
4394         if (likely(p))
4395                 return 0;
4396 out_overflow:
4397         print_overflow_msg(__func__, xdr);
4398         return -EIO;
4399 }
4400
4401 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
4402 {
4403         __be32 *p;
4404         uint32_t opnum;
4405         int32_t nfserr;
4406
4407         p = xdr_inline_decode(xdr, 8);
4408         if (unlikely(!p))
4409                 goto out_overflow;
4410         opnum = be32_to_cpup(p++);
4411         if (opnum != OP_SETCLIENTID) {
4412                 dprintk("nfs: decode_setclientid: Server returned operation"
4413                         " %d\n", opnum);
4414                 return -EIO;
4415         }
4416         nfserr = be32_to_cpup(p);
4417         if (nfserr == NFS_OK) {
4418                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4419                 if (unlikely(!p))
4420                         goto out_overflow;
4421                 p = xdr_decode_hyper(p, &clp->cl_clientid);
4422                 memcpy(clp->cl_confirm.data, p, NFS4_VERIFIER_SIZE);
4423         } else if (nfserr == NFSERR_CLID_INUSE) {
4424                 uint32_t len;
4425
4426                 /* skip netid string */
4427                 p = xdr_inline_decode(xdr, 4);
4428                 if (unlikely(!p))
4429                         goto out_overflow;
4430                 len = be32_to_cpup(p);
4431                 p = xdr_inline_decode(xdr, len);
4432                 if (unlikely(!p))
4433                         goto out_overflow;
4434
4435                 /* skip uaddr string */
4436                 p = xdr_inline_decode(xdr, 4);
4437                 if (unlikely(!p))
4438                         goto out_overflow;
4439                 len = be32_to_cpup(p);
4440                 p = xdr_inline_decode(xdr, len);
4441                 if (unlikely(!p))
4442                         goto out_overflow;
4443                 return -NFSERR_CLID_INUSE;
4444         } else
4445                 return nfs4_stat_to_errno(nfserr);
4446
4447         return 0;
4448 out_overflow:
4449         print_overflow_msg(__func__, xdr);
4450         return -EIO;
4451 }
4452
4453 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4454 {
4455         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4456 }
4457
4458 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4459 {
4460         __be32 *p;
4461         int status;
4462
4463         status = decode_op_hdr(xdr, OP_WRITE);
4464         if (status)
4465                 return status;
4466
4467         p = xdr_inline_decode(xdr, 16);
4468         if (unlikely(!p))
4469                 goto out_overflow;
4470         res->count = be32_to_cpup(p++);
4471         res->verf->committed = be32_to_cpup(p++);
4472         memcpy(res->verf->verifier, p, 8);
4473         return 0;
4474 out_overflow:
4475         print_overflow_msg(__func__, xdr);
4476         return -EIO;
4477 }
4478
4479 static int decode_delegreturn(struct xdr_stream *xdr)
4480 {
4481         return decode_op_hdr(xdr, OP_DELEGRETURN);
4482 }
4483
4484 #if defined(CONFIG_NFS_V4_1)
4485 static int decode_exchange_id(struct xdr_stream *xdr,
4486                               struct nfs41_exchange_id_res *res)
4487 {
4488         __be32 *p;
4489         uint32_t dummy;
4490         char *dummy_str;
4491         int status;
4492         struct nfs_client *clp = res->client;
4493
4494         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4495         if (status)
4496                 return status;
4497
4498         p = xdr_inline_decode(xdr, 8);
4499         if (unlikely(!p))
4500                 goto out_overflow;
4501         xdr_decode_hyper(p, &clp->cl_ex_clid);
4502         p = xdr_inline_decode(xdr, 12);
4503         if (unlikely(!p))
4504                 goto out_overflow;
4505         clp->cl_seqid = be32_to_cpup(p++);
4506         clp->cl_exchange_flags = be32_to_cpup(p++);
4507
4508         /* We ask for SP4_NONE */
4509         dummy = be32_to_cpup(p);
4510         if (dummy != SP4_NONE)
4511                 return -EIO;
4512
4513         /* Throw away minor_id */
4514         p = xdr_inline_decode(xdr, 8);
4515         if (unlikely(!p))
4516                 goto out_overflow;
4517
4518         /* Throw away Major id */
4519         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4520         if (unlikely(status))
4521                 return status;
4522
4523         /* Throw away server_scope */
4524         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4525         if (unlikely(status))
4526                 return status;
4527
4528         /* Throw away Implementation id array */
4529         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4530         if (unlikely(status))
4531                 return status;
4532
4533         return 0;
4534 out_overflow:
4535         print_overflow_msg(__func__, xdr);
4536         return -EIO;
4537 }
4538
4539 static int decode_chan_attrs(struct xdr_stream *xdr,
4540                              struct nfs4_channel_attrs *attrs)
4541 {
4542         __be32 *p;
4543         u32 nr_attrs;
4544
4545         p = xdr_inline_decode(xdr, 28);
4546         if (unlikely(!p))
4547                 goto out_overflow;
4548         attrs->headerpadsz = be32_to_cpup(p++);
4549         attrs->max_rqst_sz = be32_to_cpup(p++);
4550         attrs->max_resp_sz = be32_to_cpup(p++);
4551         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4552         attrs->max_ops = be32_to_cpup(p++);
4553         attrs->max_reqs = be32_to_cpup(p++);
4554         nr_attrs = be32_to_cpup(p);
4555         if (unlikely(nr_attrs > 1)) {
4556                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4557                         __func__, nr_attrs);
4558                 return -EINVAL;
4559         }
4560         if (nr_attrs == 1) {
4561                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4562                 if (unlikely(!p))
4563                         goto out_overflow;
4564         }
4565         return 0;
4566 out_overflow:
4567         print_overflow_msg(__func__, xdr);
4568         return -EIO;
4569 }
4570
4571 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4572 {
4573         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4574 }
4575
4576 static int decode_create_session(struct xdr_stream *xdr,
4577                                  struct nfs41_create_session_res *res)
4578 {
4579         __be32 *p;
4580         int status;
4581         struct nfs_client *clp = res->client;
4582         struct nfs4_session *session = clp->cl_session;
4583
4584         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4585         if (!status)
4586                 status = decode_sessionid(xdr, &session->sess_id);
4587         if (unlikely(status))
4588                 return status;
4589
4590         /* seqid, flags */
4591         p = xdr_inline_decode(xdr, 8);
4592         if (unlikely(!p))
4593                 goto out_overflow;
4594         clp->cl_seqid = be32_to_cpup(p++);
4595         session->flags = be32_to_cpup(p);
4596
4597         /* Channel attributes */
4598         status = decode_chan_attrs(xdr, &session->fc_attrs);
4599         if (!status)
4600                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4601         return status;
4602 out_overflow:
4603         print_overflow_msg(__func__, xdr);
4604         return -EIO;
4605 }
4606
4607 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4608 {
4609         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4610 }
4611
4612 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4613 {
4614         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4615 }
4616 #endif /* CONFIG_NFS_V4_1 */
4617
4618 static int decode_sequence(struct xdr_stream *xdr,
4619                            struct nfs4_sequence_res *res,
4620                            struct rpc_rqst *rqstp)
4621 {
4622 #if defined(CONFIG_NFS_V4_1)
4623         struct nfs4_slot *slot;
4624         struct nfs4_sessionid id;
4625         u32 dummy;
4626         int status;
4627         __be32 *p;
4628
4629         if (!res->sr_session)
4630                 return 0;
4631
4632         status = decode_op_hdr(xdr, OP_SEQUENCE);
4633         if (!status)
4634                 status = decode_sessionid(xdr, &id);
4635         if (unlikely(status))
4636                 goto out_err;
4637
4638         /*
4639          * If the server returns different values for sessionID, slotID or
4640          * sequence number, the server is looney tunes.
4641          */
4642         status = -EREMOTEIO;
4643
4644         if (memcmp(id.data, res->sr_session->sess_id.data,
4645                    NFS4_MAX_SESSIONID_LEN)) {
4646                 dprintk("%s Invalid session id\n", __func__);
4647                 goto out_err;
4648         }
4649
4650         p = xdr_inline_decode(xdr, 20);
4651         if (unlikely(!p))
4652                 goto out_overflow;
4653
4654         /* seqid */
4655         slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
4656         dummy = be32_to_cpup(p++);
4657         if (dummy != slot->seq_nr) {
4658                 dprintk("%s Invalid sequence number\n", __func__);
4659                 goto out_err;
4660         }
4661         /* slot id */
4662         dummy = be32_to_cpup(p++);
4663         if (dummy != res->sr_slotid) {
4664                 dprintk("%s Invalid slot id\n", __func__);
4665                 goto out_err;
4666         }
4667         /* highest slot id - currently not processed */
4668         dummy = be32_to_cpup(p++);
4669         /* target highest slot id - currently not processed */
4670         dummy = be32_to_cpup(p++);
4671         /* result flags */
4672         res->sr_status_flags = be32_to_cpup(p);
4673         status = 0;
4674 out_err:
4675         res->sr_status = status;
4676         return status;
4677 out_overflow:
4678         print_overflow_msg(__func__, xdr);
4679         status = -EIO;
4680         goto out_err;
4681 #else  /* CONFIG_NFS_V4_1 */
4682         return 0;
4683 #endif /* CONFIG_NFS_V4_1 */
4684 }
4685
4686 /*
4687  * END OF "GENERIC" DECODE ROUTINES.
4688  */
4689
4690 /*
4691  * Decode OPEN_DOWNGRADE response
4692  */
4693 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4694 {
4695         struct xdr_stream xdr;
4696         struct compound_hdr hdr;
4697         int status;
4698
4699         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4700         status = decode_compound_hdr(&xdr, &hdr);
4701         if (status)
4702                 goto out;
4703         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4704         if (status)
4705                 goto out;
4706         status = decode_putfh(&xdr);
4707         if (status)
4708                 goto out;
4709         status = decode_open_downgrade(&xdr, res);
4710         if (status != 0)
4711                 goto out;
4712         decode_getfattr(&xdr, res->fattr, res->server,
4713                         !RPC_IS_ASYNC(rqstp->rq_task));
4714 out:
4715         return status;
4716 }
4717
4718 /*
4719  * Decode ACCESS response
4720  */
4721 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4722 {
4723         struct xdr_stream xdr;
4724         struct compound_hdr hdr;
4725         int status;
4726
4727         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4728         status = decode_compound_hdr(&xdr, &hdr);
4729         if (status)
4730                 goto out;
4731         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4732         if (status)
4733                 goto out;
4734         status = decode_putfh(&xdr);
4735         if (status != 0)
4736                 goto out;
4737         status = decode_access(&xdr, res);
4738         if (status != 0)
4739                 goto out;
4740         decode_getfattr(&xdr, res->fattr, res->server,
4741                         !RPC_IS_ASYNC(rqstp->rq_task));
4742 out:
4743         return status;
4744 }
4745
4746 /*
4747  * Decode LOOKUP response
4748  */
4749 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4750 {
4751         struct xdr_stream xdr;
4752         struct compound_hdr hdr;
4753         int status;
4754
4755         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4756         status = decode_compound_hdr(&xdr, &hdr);
4757         if (status)
4758                 goto out;
4759         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4760         if (status)
4761                 goto out;
4762         if ((status = decode_putfh(&xdr)) != 0)
4763                 goto out;
4764         if ((status = decode_lookup(&xdr)) != 0)
4765                 goto out;
4766         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4767                 goto out;
4768         status = decode_getfattr(&xdr, res->fattr, res->server
4769                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4770 out:
4771         return status;
4772 }
4773
4774 /*
4775  * Decode LOOKUP_ROOT response
4776  */
4777 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4778 {
4779         struct xdr_stream xdr;
4780         struct compound_hdr hdr;
4781         int status;
4782
4783         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4784         status = decode_compound_hdr(&xdr, &hdr);
4785         if (status)
4786                 goto out;
4787         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4788         if (status)
4789                 goto out;
4790         if ((status = decode_putrootfh(&xdr)) != 0)
4791                 goto out;
4792         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4793                 status = decode_getfattr(&xdr, res->fattr, res->server,
4794                                 !RPC_IS_ASYNC(rqstp->rq_task));
4795 out:
4796         return status;
4797 }
4798
4799 /*
4800  * Decode REMOVE response
4801  */
4802 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4803 {
4804         struct xdr_stream xdr;
4805         struct compound_hdr hdr;
4806         int status;
4807
4808         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4809         status = decode_compound_hdr(&xdr, &hdr);
4810         if (status)
4811                 goto out;
4812         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4813         if (status)
4814                 goto out;
4815         if ((status = decode_putfh(&xdr)) != 0)
4816                 goto out;
4817         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4818                 goto out;
4819         decode_getfattr(&xdr, &res->dir_attr, res->server,
4820                         !RPC_IS_ASYNC(rqstp->rq_task));
4821 out:
4822         return status;
4823 }
4824
4825 /*
4826  * Decode RENAME response
4827  */
4828 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4829 {
4830         struct xdr_stream xdr;
4831         struct compound_hdr hdr;
4832         int status;
4833
4834         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4835         status = decode_compound_hdr(&xdr, &hdr);
4836         if (status)
4837                 goto out;
4838         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4839         if (status)
4840                 goto out;
4841         if ((status = decode_putfh(&xdr)) != 0)
4842                 goto out;
4843         if ((status = decode_savefh(&xdr)) != 0)
4844                 goto out;
4845         if ((status = decode_putfh(&xdr)) != 0)
4846                 goto out;
4847         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4848                 goto out;
4849         /* Current FH is target directory */
4850         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4851                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4852                 goto out;
4853         if ((status = decode_restorefh(&xdr)) != 0)
4854                 goto out;
4855         decode_getfattr(&xdr, res->old_fattr, res->server,
4856                         !RPC_IS_ASYNC(rqstp->rq_task));
4857 out:
4858         return status;
4859 }
4860
4861 /*
4862  * Decode LINK response
4863  */
4864 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4865 {
4866         struct xdr_stream xdr;
4867         struct compound_hdr hdr;
4868         int status;
4869
4870         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4871         status = decode_compound_hdr(&xdr, &hdr);
4872         if (status)
4873                 goto out;
4874         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4875         if (status)
4876                 goto out;
4877         if ((status = decode_putfh(&xdr)) != 0)
4878                 goto out;
4879         if ((status = decode_savefh(&xdr)) != 0)
4880                 goto out;
4881         if ((status = decode_putfh(&xdr)) != 0)
4882                 goto out;
4883         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4884                 goto out;
4885         /*
4886          * Note order: OP_LINK leaves the directory as the current
4887          *             filehandle.
4888          */
4889         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4890                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4891                 goto out;
4892         if ((status = decode_restorefh(&xdr)) != 0)
4893                 goto out;
4894         decode_getfattr(&xdr, res->fattr, res->server,
4895                         !RPC_IS_ASYNC(rqstp->rq_task));
4896 out:
4897         return status;
4898 }
4899
4900 /*
4901  * Decode CREATE response
4902  */
4903 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4904 {
4905         struct xdr_stream xdr;
4906         struct compound_hdr hdr;
4907         int status;
4908
4909         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4910         status = decode_compound_hdr(&xdr, &hdr);
4911         if (status)
4912                 goto out;
4913         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4914         if (status)
4915                 goto out;
4916         if ((status = decode_putfh(&xdr)) != 0)
4917                 goto out;
4918         if ((status = decode_savefh(&xdr)) != 0)
4919                 goto out;
4920         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4921                 goto out;
4922         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4923                 goto out;
4924         if (decode_getfattr(&xdr, res->fattr, res->server,
4925                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4926                 goto out;
4927         if ((status = decode_restorefh(&xdr)) != 0)
4928                 goto out;
4929         decode_getfattr(&xdr, res->dir_fattr, res->server,
4930                         !RPC_IS_ASYNC(rqstp->rq_task));
4931 out:
4932         return status;
4933 }
4934
4935 /*
4936  * Decode SYMLINK response
4937  */
4938 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4939 {
4940         return nfs4_xdr_dec_create(rqstp, p, res);
4941 }
4942
4943 /*
4944  * Decode GETATTR response
4945  */
4946 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4947 {
4948         struct xdr_stream xdr;
4949         struct compound_hdr hdr;
4950         int status;
4951
4952         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4953         status = decode_compound_hdr(&xdr, &hdr);
4954         if (status)
4955                 goto out;
4956         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4957         if (status)
4958                 goto out;
4959         status = decode_putfh(&xdr);
4960         if (status)
4961                 goto out;
4962         status = decode_getfattr(&xdr, res->fattr, res->server,
4963                         !RPC_IS_ASYNC(rqstp->rq_task));
4964 out:
4965         return status;
4966 }
4967
4968 /*
4969  * Encode an SETACL request
4970  */
4971 static int
4972 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4973 {
4974         struct xdr_stream xdr;
4975         struct compound_hdr hdr = {
4976                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4977         };
4978         int status;
4979
4980         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4981         encode_compound_hdr(&xdr, req, &hdr);
4982         encode_sequence(&xdr, &args->seq_args, &hdr);
4983         encode_putfh(&xdr, args->fh, &hdr);
4984         status = encode_setacl(&xdr, args, &hdr);
4985         encode_nops(&hdr);
4986         return status;
4987 }
4988
4989 /*
4990  * Decode SETACL response
4991  */
4992 static int
4993 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4994                     struct nfs_setaclres *res)
4995 {
4996         struct xdr_stream xdr;
4997         struct compound_hdr hdr;
4998         int status;
4999
5000         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5001         status = decode_compound_hdr(&xdr, &hdr);
5002         if (status)
5003                 goto out;
5004         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5005         if (status)
5006                 goto out;
5007         status = decode_putfh(&xdr);
5008         if (status)
5009                 goto out;
5010         status = decode_setattr(&xdr);
5011 out:
5012         return status;
5013 }
5014
5015 /*
5016  * Decode GETACL response
5017  */
5018 static int
5019 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5020                     struct nfs_getaclres *res)
5021 {
5022         struct xdr_stream xdr;
5023         struct compound_hdr hdr;
5024         int status;
5025
5026         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5027         status = decode_compound_hdr(&xdr, &hdr);
5028         if (status)
5029                 goto out;
5030         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5031         if (status)
5032                 goto out;
5033         status = decode_putfh(&xdr);
5034         if (status)
5035                 goto out;
5036         status = decode_getacl(&xdr, rqstp, &res->acl_len);
5037
5038 out:
5039         return status;
5040 }
5041
5042 /*
5043  * Decode CLOSE response
5044  */
5045 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5046 {
5047         struct xdr_stream xdr;
5048         struct compound_hdr hdr;
5049         int status;
5050
5051         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5052         status = decode_compound_hdr(&xdr, &hdr);
5053         if (status)
5054                 goto out;
5055         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5056         if (status)
5057                 goto out;
5058         status = decode_putfh(&xdr);
5059         if (status)
5060                 goto out;
5061         status = decode_close(&xdr, res);
5062         if (status != 0)
5063                 goto out;
5064         /*
5065          * Note: Server may do delete on close for this file
5066          *      in which case the getattr call will fail with
5067          *      an ESTALE error. Shouldn't be a problem,
5068          *      though, since fattr->valid will remain unset.
5069          */
5070         decode_getfattr(&xdr, res->fattr, res->server,
5071                         !RPC_IS_ASYNC(rqstp->rq_task));
5072 out:
5073         return status;
5074 }
5075
5076 /*
5077  * Decode OPEN response
5078  */
5079 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5080 {
5081         struct xdr_stream xdr;
5082         struct compound_hdr hdr;
5083         int status;
5084
5085         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5086         status = decode_compound_hdr(&xdr, &hdr);
5087         if (status)
5088                 goto out;
5089         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5090         if (status)
5091                 goto out;
5092         status = decode_putfh(&xdr);
5093         if (status)
5094                 goto out;
5095         status = decode_savefh(&xdr);
5096         if (status)
5097                 goto out;
5098         status = decode_open(&xdr, res);
5099         if (status)
5100                 goto out;
5101         if (decode_getfh(&xdr, &res->fh) != 0)
5102                 goto out;
5103         if (decode_getfattr(&xdr, res->f_attr, res->server,
5104                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5105                 goto out;
5106         if (decode_restorefh(&xdr) != 0)
5107                 goto out;
5108         decode_getfattr(&xdr, res->dir_attr, res->server,
5109                         !RPC_IS_ASYNC(rqstp->rq_task));
5110 out:
5111         return status;
5112 }
5113
5114 /*
5115  * Decode OPEN_CONFIRM response
5116  */
5117 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5118 {
5119         struct xdr_stream xdr;
5120         struct compound_hdr hdr;
5121         int status;
5122
5123         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5124         status = decode_compound_hdr(&xdr, &hdr);
5125         if (status)
5126                 goto out;
5127         status = decode_putfh(&xdr);
5128         if (status)
5129                 goto out;
5130         status = decode_open_confirm(&xdr, res);
5131 out:
5132         return status;
5133 }
5134
5135 /*
5136  * Decode OPEN response
5137  */
5138 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5139 {
5140         struct xdr_stream xdr;
5141         struct compound_hdr hdr;
5142         int status;
5143
5144         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5145         status = decode_compound_hdr(&xdr, &hdr);
5146         if (status)
5147                 goto out;
5148         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5149         if (status)
5150                 goto out;
5151         status = decode_putfh(&xdr);
5152         if (status)
5153                 goto out;
5154         status = decode_open(&xdr, res);
5155         if (status)
5156                 goto out;
5157         decode_getfattr(&xdr, res->f_attr, res->server,
5158                         !RPC_IS_ASYNC(rqstp->rq_task));
5159 out:
5160         return status;
5161 }
5162
5163 /*
5164  * Decode SETATTR response
5165  */
5166 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5167 {
5168         struct xdr_stream xdr;
5169         struct compound_hdr hdr;
5170         int status;
5171
5172         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5173         status = decode_compound_hdr(&xdr, &hdr);
5174         if (status)
5175                 goto out;
5176         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5177         if (status)
5178                 goto out;
5179         status = decode_putfh(&xdr);
5180         if (status)
5181                 goto out;
5182         status = decode_setattr(&xdr);
5183         if (status)
5184                 goto out;
5185         decode_getfattr(&xdr, res->fattr, res->server,
5186                         !RPC_IS_ASYNC(rqstp->rq_task));
5187 out:
5188         return status;
5189 }
5190
5191 /*
5192  * Decode LOCK response
5193  */
5194 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5195 {
5196         struct xdr_stream xdr;
5197         struct compound_hdr hdr;
5198         int status;
5199
5200         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5201         status = decode_compound_hdr(&xdr, &hdr);
5202         if (status)
5203                 goto out;
5204         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5205         if (status)
5206                 goto out;
5207         status = decode_putfh(&xdr);
5208         if (status)
5209                 goto out;
5210         status = decode_lock(&xdr, res);
5211 out:
5212         return status;
5213 }
5214
5215 /*
5216  * Decode LOCKT response
5217  */
5218 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5219 {
5220         struct xdr_stream xdr;
5221         struct compound_hdr hdr;
5222         int status;
5223
5224         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5225         status = decode_compound_hdr(&xdr, &hdr);
5226         if (status)
5227                 goto out;
5228         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5229         if (status)
5230                 goto out;
5231         status = decode_putfh(&xdr);
5232         if (status)
5233                 goto out;
5234         status = decode_lockt(&xdr, res);
5235 out:
5236         return status;
5237 }
5238
5239 /*
5240  * Decode LOCKU response
5241  */
5242 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5243 {
5244         struct xdr_stream xdr;
5245         struct compound_hdr hdr;
5246         int status;
5247
5248         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5249         status = decode_compound_hdr(&xdr, &hdr);
5250         if (status)
5251                 goto out;
5252         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5253         if (status)
5254                 goto out;
5255         status = decode_putfh(&xdr);
5256         if (status)
5257                 goto out;
5258         status = decode_locku(&xdr, res);
5259 out:
5260         return status;
5261 }
5262
5263 /*
5264  * Decode READLINK response
5265  */
5266 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5267                                  struct nfs4_readlink_res *res)
5268 {
5269         struct xdr_stream xdr;
5270         struct compound_hdr hdr;
5271         int status;
5272
5273         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5274         status = decode_compound_hdr(&xdr, &hdr);
5275         if (status)
5276                 goto out;
5277         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5278         if (status)
5279                 goto out;
5280         status = decode_putfh(&xdr);
5281         if (status)
5282                 goto out;
5283         status = decode_readlink(&xdr, rqstp);
5284 out:
5285         return status;
5286 }
5287
5288 /*
5289  * Decode READDIR response
5290  */
5291 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5292 {
5293         struct xdr_stream xdr;
5294         struct compound_hdr hdr;
5295         int status;
5296
5297         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5298         status = decode_compound_hdr(&xdr, &hdr);
5299         if (status)
5300                 goto out;
5301         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5302         if (status)
5303                 goto out;
5304         status = decode_putfh(&xdr);
5305         if (status)
5306                 goto out;
5307         status = decode_readdir(&xdr, rqstp, res);
5308 out:
5309         return status;
5310 }
5311
5312 /*
5313  * Decode Read response
5314  */
5315 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5316 {
5317         struct xdr_stream xdr;
5318         struct compound_hdr hdr;
5319         int status;
5320
5321         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5322         status = decode_compound_hdr(&xdr, &hdr);
5323         if (status)
5324                 goto out;
5325         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5326         if (status)
5327                 goto out;
5328         status = decode_putfh(&xdr);
5329         if (status)
5330                 goto out;
5331         status = decode_read(&xdr, rqstp, res);
5332         if (!status)
5333                 status = res->count;
5334 out:
5335         return status;
5336 }
5337
5338 /*
5339  * Decode WRITE response
5340  */
5341 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5342 {
5343         struct xdr_stream xdr;
5344         struct compound_hdr hdr;
5345         int status;
5346
5347         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5348         status = decode_compound_hdr(&xdr, &hdr);
5349         if (status)
5350                 goto out;
5351         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5352         if (status)
5353                 goto out;
5354         status = decode_putfh(&xdr);
5355         if (status)
5356                 goto out;
5357         status = decode_write(&xdr, res);
5358         if (status)
5359                 goto out;
5360         decode_getfattr(&xdr, res->fattr, res->server,
5361                         !RPC_IS_ASYNC(rqstp->rq_task));
5362         if (!status)
5363                 status = res->count;
5364 out:
5365         return status;
5366 }
5367
5368 /*
5369  * Decode COMMIT response
5370  */
5371 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5372 {
5373         struct xdr_stream xdr;
5374         struct compound_hdr hdr;
5375         int status;
5376
5377         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5378         status = decode_compound_hdr(&xdr, &hdr);
5379         if (status)
5380                 goto out;
5381         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5382         if (status)
5383                 goto out;
5384         status = decode_putfh(&xdr);
5385         if (status)
5386                 goto out;
5387         status = decode_commit(&xdr, res);
5388         if (status)
5389                 goto out;
5390         decode_getfattr(&xdr, res->fattr, res->server,
5391                         !RPC_IS_ASYNC(rqstp->rq_task));
5392 out:
5393         return status;
5394 }
5395
5396 /*
5397  * Decode FSINFO response
5398  */
5399 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5400                                struct nfs4_fsinfo_res *res)
5401 {
5402         struct xdr_stream xdr;
5403         struct compound_hdr hdr;
5404         int status;
5405
5406         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5407         status = decode_compound_hdr(&xdr, &hdr);
5408         if (!status)
5409                 status = decode_sequence(&xdr, &res->seq_res, req);
5410         if (!status)
5411                 status = decode_putfh(&xdr);
5412         if (!status)
5413                 status = decode_fsinfo(&xdr, res->fsinfo);
5414         return status;
5415 }
5416
5417 /*
5418  * Decode PATHCONF response
5419  */
5420 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5421                                  struct nfs4_pathconf_res *res)
5422 {
5423         struct xdr_stream xdr;
5424         struct compound_hdr hdr;
5425         int status;
5426
5427         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5428         status = decode_compound_hdr(&xdr, &hdr);
5429         if (!status)
5430                 status = decode_sequence(&xdr, &res->seq_res, req);
5431         if (!status)
5432                 status = decode_putfh(&xdr);
5433         if (!status)
5434                 status = decode_pathconf(&xdr, res->pathconf);
5435         return status;
5436 }
5437
5438 /*
5439  * Decode STATFS response
5440  */
5441 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5442                                struct nfs4_statfs_res *res)
5443 {
5444         struct xdr_stream xdr;
5445         struct compound_hdr hdr;
5446         int status;
5447
5448         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5449         status = decode_compound_hdr(&xdr, &hdr);
5450         if (!status)
5451                 status = decode_sequence(&xdr, &res->seq_res, req);
5452         if (!status)
5453                 status = decode_putfh(&xdr);
5454         if (!status)
5455                 status = decode_statfs(&xdr, res->fsstat);
5456         return status;
5457 }
5458
5459 /*
5460  * Decode GETATTR_BITMAP response
5461  */
5462 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5463 {
5464         struct xdr_stream xdr;
5465         struct compound_hdr hdr;
5466         int status;
5467
5468         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5469         status = decode_compound_hdr(&xdr, &hdr);
5470         if (status)
5471                 goto out;
5472         status = decode_sequence(&xdr, &res->seq_res, req);
5473         if (status)
5474                 goto out;
5475         if ((status = decode_putfh(&xdr)) != 0)
5476                 goto out;
5477         status = decode_server_caps(&xdr, res);
5478 out:
5479         return status;
5480 }
5481
5482 /*
5483  * Decode RENEW response
5484  */
5485 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5486 {
5487         struct xdr_stream xdr;
5488         struct compound_hdr hdr;
5489         int status;
5490
5491         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5492         status = decode_compound_hdr(&xdr, &hdr);
5493         if (!status)
5494                 status = decode_renew(&xdr);
5495         return status;
5496 }
5497
5498 /*
5499  * Decode SETCLIENTID response
5500  */
5501 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5502                 struct nfs_client *clp)
5503 {
5504         struct xdr_stream xdr;
5505         struct compound_hdr hdr;
5506         int status;
5507
5508         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5509         status = decode_compound_hdr(&xdr, &hdr);
5510         if (!status)
5511                 status = decode_setclientid(&xdr, clp);
5512         return status;
5513 }
5514
5515 /*
5516  * Decode SETCLIENTID_CONFIRM response
5517  */
5518 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5519 {
5520         struct xdr_stream xdr;
5521         struct compound_hdr hdr;
5522         int status;
5523
5524         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5525         status = decode_compound_hdr(&xdr, &hdr);
5526         if (!status)
5527                 status = decode_setclientid_confirm(&xdr);
5528         if (!status)
5529                 status = decode_putrootfh(&xdr);
5530         if (!status)
5531                 status = decode_fsinfo(&xdr, fsinfo);
5532         return status;
5533 }
5534
5535 /*
5536  * Decode DELEGRETURN response
5537  */
5538 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5539 {
5540         struct xdr_stream xdr;
5541         struct compound_hdr hdr;
5542         int status;
5543
5544         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5545         status = decode_compound_hdr(&xdr, &hdr);
5546         if (status)
5547                 goto out;
5548         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5549         if (status)
5550                 goto out;
5551         status = decode_putfh(&xdr);
5552         if (status != 0)
5553                 goto out;
5554         status = decode_delegreturn(&xdr);
5555         decode_getfattr(&xdr, res->fattr, res->server,
5556                         !RPC_IS_ASYNC(rqstp->rq_task));
5557 out:
5558         return status;
5559 }
5560
5561 /*
5562  * Decode FS_LOCATIONS response
5563  */
5564 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5565                                      struct nfs4_fs_locations_res *res)
5566 {
5567         struct xdr_stream xdr;
5568         struct compound_hdr hdr;
5569         int status;
5570
5571         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5572         status = decode_compound_hdr(&xdr, &hdr);
5573         if (status)
5574                 goto out;
5575         status = decode_sequence(&xdr, &res->seq_res, req);
5576         if (status)
5577                 goto out;
5578         if ((status = decode_putfh(&xdr)) != 0)
5579                 goto out;
5580         if ((status = decode_lookup(&xdr)) != 0)
5581                 goto out;
5582         xdr_enter_page(&xdr, PAGE_SIZE);
5583         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5584                                  res->fs_locations->server,
5585                                  !RPC_IS_ASYNC(req->rq_task));
5586 out:
5587         return status;
5588 }
5589
5590 #if defined(CONFIG_NFS_V4_1)
5591 /*
5592  * Decode EXCHANGE_ID response
5593  */
5594 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5595                                     void *res)
5596 {
5597         struct xdr_stream xdr;
5598         struct compound_hdr hdr;
5599         int status;
5600
5601         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5602         status = decode_compound_hdr(&xdr, &hdr);
5603         if (!status)
5604                 status = decode_exchange_id(&xdr, res);
5605         return status;
5606 }
5607
5608 /*
5609  * Decode CREATE_SESSION response
5610  */
5611 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5612                                        struct nfs41_create_session_res *res)
5613 {
5614         struct xdr_stream xdr;
5615         struct compound_hdr hdr;
5616         int status;
5617
5618         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5619         status = decode_compound_hdr(&xdr, &hdr);
5620         if (!status)
5621                 status = decode_create_session(&xdr, res);
5622         return status;
5623 }
5624
5625 /*
5626  * Decode DESTROY_SESSION response
5627  */
5628 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5629                                         void *dummy)
5630 {
5631         struct xdr_stream xdr;
5632         struct compound_hdr hdr;
5633         int status;
5634
5635         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5636         status = decode_compound_hdr(&xdr, &hdr);
5637         if (!status)
5638                 status = decode_destroy_session(&xdr, dummy);
5639         return status;
5640 }
5641
5642 /*
5643  * Decode SEQUENCE response
5644  */
5645 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5646                                  struct nfs4_sequence_res *res)
5647 {
5648         struct xdr_stream xdr;
5649         struct compound_hdr hdr;
5650         int status;
5651
5652         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5653         status = decode_compound_hdr(&xdr, &hdr);
5654         if (!status)
5655                 status = decode_sequence(&xdr, res, rqstp);
5656         return status;
5657 }
5658
5659 /*
5660  * Decode GET_LEASE_TIME response
5661  */
5662 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5663                                        struct nfs4_get_lease_time_res *res)
5664 {
5665         struct xdr_stream xdr;
5666         struct compound_hdr hdr;
5667         int status;
5668
5669         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5670         status = decode_compound_hdr(&xdr, &hdr);
5671         if (!status)
5672                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5673         if (!status)
5674                 status = decode_putrootfh(&xdr);
5675         if (!status)
5676                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5677         return status;
5678 }
5679
5680 /*
5681  * Decode RECLAIM_COMPLETE response
5682  */
5683 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5684                                          struct nfs41_reclaim_complete_res *res)
5685 {
5686         struct xdr_stream xdr;
5687         struct compound_hdr hdr;
5688         int status;
5689
5690         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5691         status = decode_compound_hdr(&xdr, &hdr);
5692         if (!status)
5693                 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5694         if (!status)
5695                 status = decode_reclaim_complete(&xdr, (void *)NULL);
5696         return status;
5697 }
5698 #endif /* CONFIG_NFS_V4_1 */
5699
5700 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
5701 {
5702         uint32_t bitmap[2] = {0};
5703         uint32_t len;
5704
5705         if (!*p++) {
5706                 if (!*p)
5707                         return ERR_PTR(-EAGAIN);
5708                 entry->eof = 1;
5709                 return ERR_PTR(-EBADCOOKIE);
5710         }
5711
5712         entry->prev_cookie = entry->cookie;
5713         p = xdr_decode_hyper(p, &entry->cookie);
5714         entry->len = ntohl(*p++);
5715         entry->name = (const char *) p;
5716         p += XDR_QUADLEN(entry->len);
5717
5718         /*
5719          * In case the server doesn't return an inode number,
5720          * we fake one here.  (We don't use inode number 0,
5721          * since glibc seems to choke on it...)
5722          */
5723         entry->ino = 1;
5724
5725         len = ntohl(*p++);              /* bitmap length */
5726         if (len-- > 0) {
5727                 bitmap[0] = ntohl(*p++);
5728                 if (len-- > 0) {
5729                         bitmap[1] = ntohl(*p++);
5730                         p += len;
5731                 }
5732         }
5733         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5734         if (len > 0) {
5735                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
5736                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
5737                         /* Ignore the return value of rdattr_error for now */
5738                         p++;
5739                         len--;
5740                 }
5741                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
5742                         xdr_decode_hyper(p, &entry->ino);
5743                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
5744                         xdr_decode_hyper(p, &entry->ino);
5745                 p += len;
5746         }
5747
5748         entry->eof = !p[0] && p[1];
5749         return p;
5750 }
5751
5752 /*
5753  * We need to translate between nfs status return values and
5754  * the local errno values which may not be the same.
5755  */
5756 static struct {
5757         int stat;
5758         int errno;
5759 } nfs_errtbl[] = {
5760         { NFS4_OK,              0               },
5761         { NFS4ERR_PERM,         -EPERM          },
5762         { NFS4ERR_NOENT,        -ENOENT         },
5763         { NFS4ERR_IO,           -errno_NFSERR_IO},
5764         { NFS4ERR_NXIO,         -ENXIO          },
5765         { NFS4ERR_ACCESS,       -EACCES         },
5766         { NFS4ERR_EXIST,        -EEXIST         },
5767         { NFS4ERR_XDEV,         -EXDEV          },
5768         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5769         { NFS4ERR_ISDIR,        -EISDIR         },
5770         { NFS4ERR_INVAL,        -EINVAL         },
5771         { NFS4ERR_FBIG,         -EFBIG          },
5772         { NFS4ERR_NOSPC,        -ENOSPC         },
5773         { NFS4ERR_ROFS,         -EROFS          },
5774         { NFS4ERR_MLINK,        -EMLINK         },
5775         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5776         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5777         { NFS4ERR_DQUOT,        -EDQUOT         },
5778         { NFS4ERR_STALE,        -ESTALE         },
5779         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5780         { NFS4ERR_BADOWNER,     -EINVAL         },
5781         { NFS4ERR_BADNAME,      -EINVAL         },
5782         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5783         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5784         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5785         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
5786         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5787         { NFS4ERR_LOCKED,       -EAGAIN         },
5788         { NFS4ERR_SYMLINK,      -ELOOP          },
5789         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5790         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5791         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5792                                                     * to be handled by a
5793                                                     * middle-layer.
5794                                                     */
5795         { -1,                   -EIO            }
5796 };
5797
5798 /*
5799  * Convert an NFS error code to a local one.
5800  * This one is used jointly by NFSv2 and NFSv3.
5801  */
5802 static int
5803 nfs4_stat_to_errno(int stat)
5804 {
5805         int i;
5806         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5807                 if (nfs_errtbl[i].stat == stat)
5808                         return nfs_errtbl[i].errno;
5809         }
5810         if (stat <= 10000 || stat > 10100) {
5811                 /* The server is looney tunes. */
5812                 return -EREMOTEIO;
5813         }
5814         /* If we cannot translate the error, the recovery routines should
5815          * handle it.
5816          * Note: remaining NFSv4 error codes have values > 10000, so should
5817          * not conflict with native Linux error codes.
5818          */
5819         return -stat;
5820 }
5821
5822 #define PROC(proc, argtype, restype)                            \
5823 [NFSPROC4_CLNT_##proc] = {                                      \
5824         .p_proc   = NFSPROC4_COMPOUND,                          \
5825         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5826         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5827         .p_arglen = NFS4_##argtype##_sz,                        \
5828         .p_replen = NFS4_##restype##_sz,                        \
5829         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5830         .p_name   = #proc,                                      \
5831 }
5832
5833 struct rpc_procinfo     nfs4_procedures[] = {
5834   PROC(READ,            enc_read,       dec_read),
5835   PROC(WRITE,           enc_write,      dec_write),
5836   PROC(COMMIT,          enc_commit,     dec_commit),
5837   PROC(OPEN,            enc_open,       dec_open),
5838   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5839   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5840   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5841   PROC(CLOSE,           enc_close,      dec_close),
5842   PROC(SETATTR,         enc_setattr,    dec_setattr),
5843   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5844   PROC(RENEW,           enc_renew,      dec_renew),
5845   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5846   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5847   PROC(LOCK,            enc_lock,       dec_lock),
5848   PROC(LOCKT,           enc_lockt,      dec_lockt),
5849   PROC(LOCKU,           enc_locku,      dec_locku),
5850   PROC(ACCESS,          enc_access,     dec_access),
5851   PROC(GETATTR,         enc_getattr,    dec_getattr),
5852   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5853   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5854   PROC(REMOVE,          enc_remove,     dec_remove),
5855   PROC(RENAME,          enc_rename,     dec_rename),
5856   PROC(LINK,            enc_link,       dec_link),
5857   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5858   PROC(CREATE,          enc_create,     dec_create),
5859   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5860   PROC(STATFS,          enc_statfs,     dec_statfs),
5861   PROC(READLINK,        enc_readlink,   dec_readlink),
5862   PROC(READDIR,         enc_readdir,    dec_readdir),
5863   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5864   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5865   PROC(GETACL,          enc_getacl,     dec_getacl),
5866   PROC(SETACL,          enc_setacl,     dec_setacl),
5867   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5868 #if defined(CONFIG_NFS_V4_1)
5869   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5870   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5871   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5872   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5873   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5874   PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
5875 #endif /* CONFIG_NFS_V4_1 */
5876 };
5877
5878 struct rpc_version              nfs_version4 = {
5879         .number                 = 4,
5880         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5881         .procs                  = nfs4_procedures
5882 };
5883
5884 /*
5885  * Local variables:
5886  *  c-basic-offset: 8
5887  * End:
5888  */