fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/nfs.h>
  50 #include <linux/nfs4.h>
  51 #include <linux/nfs_fs.h>
  52 #include <linux/nfs_idmap.h>
  53 #include "nfs4_fs.h"
  54 #include "internal.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lockowner_maxsz  (7)
 206 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 207                                  7 + \
 208                                  1 + encode_stateid_maxsz + 1 + \
 209                                  encode_lockowner_maxsz)
 210 #define decode_lock_denied_maxsz \
 211                                 (8 + decode_lockowner_maxsz)
 212 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 213                                  decode_lock_denied_maxsz)
 214 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 215                                 encode_lockowner_maxsz)
 216 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 217                                  decode_lock_denied_maxsz)
 218 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 219                                  encode_stateid_maxsz + \
 220                                  4)
 221 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 222                                  decode_stateid_maxsz)
 223 #define encode_release_lockowner_maxsz \
 224                                 (op_encode_hdr_maxsz + \
 225                                  encode_lockowner_maxsz)
 226 #define decode_release_lockowner_maxsz \
 227                                 (op_decode_hdr_maxsz)
 228 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 229 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 230 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 231                                 1 + nfs4_name_maxsz + \
 232                                 1 + \
 233                                 nfs4_fattr_maxsz)
 234 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 235 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 236                                 1 + 2 + nfs4_name_maxsz + \
 237                                 encode_attrs_maxsz)
 238 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 239                                 decode_change_info_maxsz + \
 240                                 nfs4_fattr_bitmap_maxsz)
 241 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 242 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 243 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 244 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 245 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 246 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 247                                  nfs4_fattr_bitmap_maxsz + 1)
 248 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 249                                  encode_stateid_maxsz + 3)
 250 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 251 #define encode_fs_locations_maxsz \
 252                                 (encode_getattr_maxsz)
 253 #define decode_fs_locations_maxsz \
 254                                 (0)
 255
 256 #if defined(CONFIG_NFS_V4_1)
 257 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 258
 259 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 260                                 encode_verifier_maxsz + \
 261                                 1 /* co_ownerid.len */ + \
 262                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 263                                 1 /* flags */ + \
 264                                 1 /* spa_how */ + \
 265                                 0 /* SP4_NONE (for now) */ + \
 266                                 1 /* zero implemetation id array */)
 267 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 268                                 2 /* eir_clientid */ + \
 269                                 1 /* eir_sequenceid */ + \
 270                                 1 /* eir_flags */ + \
 271                                 1 /* spr_how */ + \
 272                                 0 /* SP4_NONE (for now) */ + \
 273                                 2 /* eir_server_owner.so_minor_id */ + \
 274                                 /* eir_server_owner.so_major_id<> */ \
 275                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 276                                 /* eir_server_scope<> */ \
 277                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 278                                 1 /* eir_server_impl_id array length */ + \
 279                                 0 /* ignored eir_server_impl_id contents */)
 280 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 281 #define decode_channel_attrs_maxsz  (6 + \
 282                                      1 /* ca_rdma_ird.len */ + \
 283                                      1 /* ca_rdma_ird */)
 284 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 285                                      2 /* csa_clientid */ + \
 286                                      1 /* csa_sequence */ + \
 287                                      1 /* csa_flags */ + \
 288                                      encode_channel_attrs_maxsz + \
 289                                      encode_channel_attrs_maxsz + \
 290                                      1 /* csa_cb_program */ + \
 291                                      1 /* csa_sec_parms.len (1) */ + \
 292                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 293                                      1 /* stamp */ + \
 294                                      1 /* machinename.len */ + \
 295                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 296                                      1 /* uid */ + \
 297                                      1 /* gid */ + \
 298                                      1 /* gids.len (0) */)
 299 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 300                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 301                                      1 /* csr_sequence */ + \
 302                                      1 /* csr_flags */ + \
 303                                      decode_channel_attrs_maxsz + \
 304                                      decode_channel_attrs_maxsz)
 305 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 306 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 307 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 308                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 309 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 310                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 311 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 312 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 313 #else /* CONFIG_NFS_V4_1 */
 314 #define encode_sequence_maxsz   0
 315 #define decode_sequence_maxsz   0
 316 #endif /* CONFIG_NFS_V4_1 */
 317
 318 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 319 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 320 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 321                                 encode_sequence_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_read_maxsz)
 324 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 325                                 decode_sequence_maxsz + \
 326                                 decode_putfh_maxsz + \
 327                                 decode_read_maxsz)
 328 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 329                                 encode_sequence_maxsz + \
 330                                 encode_putfh_maxsz + \
 331                                 encode_readlink_maxsz)
 332 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 333                                 decode_sequence_maxsz + \
 334                                 decode_putfh_maxsz + \
 335                                 decode_readlink_maxsz)
 336 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 337                                 encode_sequence_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_readdir_maxsz)
 340 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 341                                 decode_sequence_maxsz + \
 342                                 decode_putfh_maxsz + \
 343                                 decode_readdir_maxsz)
 344 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_write_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_write_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_commit_maxsz + \
 358                                 encode_getattr_maxsz)
 359 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 360                                 decode_sequence_maxsz + \
 361                                 decode_putfh_maxsz + \
 362                                 decode_commit_maxsz + \
 363                                 decode_getattr_maxsz)
 364 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 365                                 encode_sequence_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_savefh_maxsz + \
 368                                 encode_open_maxsz + \
 369                                 encode_getfh_maxsz + \
 370                                 encode_getattr_maxsz + \
 371                                 encode_restorefh_maxsz + \
 372                                 encode_getattr_maxsz)
 373 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 374                                 decode_sequence_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_savefh_maxsz + \
 377                                 decode_open_maxsz + \
 378                                 decode_getfh_maxsz + \
 379                                 decode_getattr_maxsz + \
 380                                 decode_restorefh_maxsz + \
 381                                 decode_getattr_maxsz)
 382 #define NFS4_enc_open_confirm_sz \
 383                                 (compound_encode_hdr_maxsz + \
 384                                  encode_putfh_maxsz + \
 385                                  encode_open_confirm_maxsz)
 386 #define NFS4_dec_open_confirm_sz \
 387                                 (compound_decode_hdr_maxsz + \
 388                                  decode_putfh_maxsz + \
 389                                  decode_open_confirm_maxsz)
 390 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 391                                         encode_sequence_maxsz + \
 392                                         encode_putfh_maxsz + \
 393                                         encode_open_maxsz + \
 394                                         encode_getattr_maxsz)
 395 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 396                                         decode_sequence_maxsz + \
 397                                         decode_putfh_maxsz + \
 398                                         decode_open_maxsz + \
 399                                         decode_getattr_maxsz)
 400 #define NFS4_enc_open_downgrade_sz \
 401                                 (compound_encode_hdr_maxsz + \
 402                                  encode_sequence_maxsz + \
 403                                  encode_putfh_maxsz + \
 404                                  encode_open_downgrade_maxsz + \
 405                                  encode_getattr_maxsz)
 406 #define NFS4_dec_open_downgrade_sz \
 407                                 (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_open_downgrade_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_close_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_close_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 423                                  encode_sequence_maxsz + \
 424                                  encode_putfh_maxsz + \
 425                                  encode_setattr_maxsz + \
 426                                  encode_getattr_maxsz)
 427 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 428                                  decode_sequence_maxsz + \
 429                                  decode_putfh_maxsz + \
 430                                  decode_setattr_maxsz + \
 431                                  decode_getattr_maxsz)
 432 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 433                                 encode_sequence_maxsz + \
 434                                 encode_putfh_maxsz + \
 435                                 encode_fsinfo_maxsz)
 436 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 437                                 decode_sequence_maxsz + \
 438                                 decode_putfh_maxsz + \
 439                                 decode_fsinfo_maxsz)
 440 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 441                                 encode_renew_maxsz)
 442 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 443                                 decode_renew_maxsz)
 444 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 445                                 encode_setclientid_maxsz)
 446 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 447                                 decode_setclientid_maxsz)
 448 #define NFS4_enc_setclientid_confirm_sz \
 449                                 (compound_encode_hdr_maxsz + \
 450                                 encode_setclientid_confirm_maxsz + \
 451                                 encode_putrootfh_maxsz + \
 452                                 encode_fsinfo_maxsz)
 453 #define NFS4_dec_setclientid_confirm_sz \
 454                                 (compound_decode_hdr_maxsz + \
 455                                 decode_setclientid_confirm_maxsz + \
 456                                 decode_putrootfh_maxsz + \
 457                                 decode_fsinfo_maxsz)
 458 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 459                                 encode_sequence_maxsz + \
 460                                 encode_putfh_maxsz + \
 461                                 encode_lock_maxsz)
 462 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 463                                 decode_sequence_maxsz + \
 464                                 decode_putfh_maxsz + \
 465                                 decode_lock_maxsz)
 466 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 467                                 encode_sequence_maxsz + \
 468                                 encode_putfh_maxsz + \
 469                                 encode_lockt_maxsz)
 470 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 471                                  decode_sequence_maxsz + \
 472                                  decode_putfh_maxsz + \
 473                                  decode_lockt_maxsz)
 474 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 475                                 encode_sequence_maxsz + \
 476                                 encode_putfh_maxsz + \
 477                                 encode_locku_maxsz)
 478 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 479                                 decode_sequence_maxsz + \
 480                                 decode_putfh_maxsz + \
 481                                 decode_locku_maxsz)
 482 #define NFS4_enc_release_lockowner_sz \
 483                                 (compound_encode_hdr_maxsz + \
 484                                  encode_lockowner_maxsz)
 485 #define NFS4_dec_release_lockowner_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_lockowner_maxsz)
 488 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_access_maxsz + \
 492                                 encode_getattr_maxsz)
 493 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 494                                 decode_sequence_maxsz + \
 495                                 decode_putfh_maxsz + \
 496                                 decode_access_maxsz + \
 497                                 decode_getattr_maxsz)
 498 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 499                                 encode_sequence_maxsz + \
 500                                 encode_putfh_maxsz + \
 501                                 encode_getattr_maxsz)
 502 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 503                                 decode_sequence_maxsz + \
 504                                 decode_putfh_maxsz + \
 505                                 decode_getattr_maxsz)
 506 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 507                                 encode_sequence_maxsz + \
 508                                 encode_putfh_maxsz + \
 509                                 encode_lookup_maxsz + \
 510                                 encode_getattr_maxsz + \
 511                                 encode_getfh_maxsz)
 512 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_lookup_maxsz + \
 516                                 decode_getattr_maxsz + \
 517                                 decode_getfh_maxsz)
 518 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 519                                 encode_sequence_maxsz + \
 520                                 encode_putrootfh_maxsz + \
 521                                 encode_getattr_maxsz + \
 522                                 encode_getfh_maxsz)
 523 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 524                                 decode_sequence_maxsz + \
 525                                 decode_putrootfh_maxsz + \
 526                                 decode_getattr_maxsz + \
 527                                 decode_getfh_maxsz)
 528 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 529                                 encode_sequence_maxsz + \
 530                                 encode_putfh_maxsz + \
 531                                 encode_remove_maxsz + \
 532                                 encode_getattr_maxsz)
 533 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_remove_maxsz + \
 537                                 decode_getattr_maxsz)
 538 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 539                                 encode_sequence_maxsz + \
 540                                 encode_putfh_maxsz + \
 541                                 encode_savefh_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_rename_maxsz + \
 544                                 encode_getattr_maxsz + \
 545                                 encode_restorefh_maxsz + \
 546                                 encode_getattr_maxsz)
 547 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 548                                 decode_sequence_maxsz + \
 549                                 decode_putfh_maxsz + \
 550                                 decode_savefh_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_rename_maxsz + \
 553                                 decode_getattr_maxsz + \
 554                                 decode_restorefh_maxsz + \
 555                                 decode_getattr_maxsz)
 556 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 557                                 encode_sequence_maxsz + \
 558                                 encode_putfh_maxsz + \
 559                                 encode_savefh_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_link_maxsz + \
 562                                 decode_getattr_maxsz + \
 563                                 encode_restorefh_maxsz + \
 564                                 decode_getattr_maxsz)
 565 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 566                                 decode_sequence_maxsz + \
 567                                 decode_putfh_maxsz + \
 568                                 decode_savefh_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_link_maxsz + \
 571                                 decode_getattr_maxsz + \
 572                                 decode_restorefh_maxsz + \
 573                                 decode_getattr_maxsz)
 574 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putfh_maxsz + \
 577                                 encode_symlink_maxsz + \
 578                                 encode_getattr_maxsz + \
 579                                 encode_getfh_maxsz)
 580 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 581                                 decode_sequence_maxsz + \
 582                                 decode_putfh_maxsz + \
 583                                 decode_symlink_maxsz + \
 584                                 decode_getattr_maxsz + \
 585                                 decode_getfh_maxsz)
 586 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 587                                 encode_sequence_maxsz + \
 588                                 encode_putfh_maxsz + \
 589                                 encode_savefh_maxsz + \
 590                                 encode_create_maxsz + \
 591                                 encode_getfh_maxsz + \
 592                                 encode_getattr_maxsz + \
 593                                 encode_restorefh_maxsz + \
 594                                 encode_getattr_maxsz)
 595 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_savefh_maxsz + \
 599                                 decode_create_maxsz + \
 600                                 decode_getfh_maxsz + \
 601                                 decode_getattr_maxsz + \
 602                                 decode_restorefh_maxsz + \
 603                                 decode_getattr_maxsz)
 604 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_statfs_maxsz)
 616 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_putfh_maxsz + \
 619                                 decode_statfs_maxsz)
 620 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 621                                 encode_sequence_maxsz + \
 622                                 encode_putfh_maxsz + \
 623                                 encode_getattr_maxsz)
 624 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_getattr_maxsz)
 628 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 629                                 encode_sequence_maxsz + \
 630                                 encode_putfh_maxsz + \
 631                                 encode_delegreturn_maxsz + \
 632                                 encode_getattr_maxsz)
 633 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_delegreturn_maxsz + \
 636                                 decode_getattr_maxsz)
 637 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_getacl_maxsz)
 641 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 642                                 decode_sequence_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_getacl_maxsz)
 645 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 646                                 encode_sequence_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_setacl_maxsz)
 649 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_setacl_maxsz)
 653 #define NFS4_enc_fs_locations_sz \
 654                                 (compound_encode_hdr_maxsz + \
 655                                  encode_sequence_maxsz + \
 656                                  encode_putfh_maxsz + \
 657                                  encode_lookup_maxsz + \
 658                                  encode_fs_locations_maxsz)
 659 #define NFS4_dec_fs_locations_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_sequence_maxsz + \
 662                                  decode_putfh_maxsz + \
 663                                  decode_lookup_maxsz + \
 664                                  decode_fs_locations_maxsz)
 665 #if defined(CONFIG_NFS_V4_1)
 666 #define NFS4_enc_exchange_id_sz \
 667                                 (compound_encode_hdr_maxsz + \
 668                                  encode_exchange_id_maxsz)
 669 #define NFS4_dec_exchange_id_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_exchange_id_maxsz)
 672 #define NFS4_enc_create_session_sz \
 673                                 (compound_encode_hdr_maxsz + \
 674                                  encode_create_session_maxsz)
 675 #define NFS4_dec_create_session_sz \
 676                                 (compound_decode_hdr_maxsz + \
 677                                  decode_create_session_maxsz)
 678 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 679                                          encode_destroy_session_maxsz)
 680 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 681                                          decode_destroy_session_maxsz)
 682 #define NFS4_enc_sequence_sz \
 683                                 (compound_decode_hdr_maxsz + \
 684                                  encode_sequence_maxsz)
 685 #define NFS4_dec_sequence_sz \
 686                                 (compound_decode_hdr_maxsz + \
 687                                  decode_sequence_maxsz)
 688 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 689                                          encode_sequence_maxsz + \
 690                                          encode_putrootfh_maxsz + \
 691                                          encode_fsinfo_maxsz)
 692 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 693                                          decode_sequence_maxsz + \
 694                                          decode_putrootfh_maxsz + \
 695                                          decode_fsinfo_maxsz)
 696 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 697                                          encode_sequence_maxsz + \
 698                                          encode_reclaim_complete_maxsz)
 699 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 700                                          decode_sequence_maxsz + \
 701                                          decode_reclaim_complete_maxsz)
 702
 703 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 704                                       compound_encode_hdr_maxsz +
 705                                       encode_sequence_maxsz +
 706                                       encode_putfh_maxsz +
 707                                       encode_getattr_maxsz) *
 708                                      XDR_UNIT);
 709
 710 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 711                                      compound_decode_hdr_maxsz +
 712                                      decode_sequence_maxsz +
 713                                      decode_putfh_maxsz) *
 714                                     XDR_UNIT);
 715 #endif /* CONFIG_NFS_V4_1 */
 716
 717 static const umode_t nfs_type2fmt[] = {
 718         [NF4BAD] = 0,
 719         [NF4REG] = S_IFREG,
 720         [NF4DIR] = S_IFDIR,
 721         [NF4BLK] = S_IFBLK,
 722         [NF4CHR] = S_IFCHR,
 723         [NF4LNK] = S_IFLNK,
 724         [NF4SOCK] = S_IFSOCK,
 725         [NF4FIFO] = S_IFIFO,
 726         [NF4ATTRDIR] = 0,
 727         [NF4NAMEDATTR] = 0,
 728 };
 729
 730 struct compound_hdr {
 731         int32_t         status;
 732         uint32_t        nops;
 733         __be32 *        nops_p;
 734         uint32_t        taglen;
 735         char *          tag;
 736         uint32_t        replen;         /* expected reply words */
 737         u32             minorversion;
 738 };
 739
 740 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 741 {
 742         __be32 *p = xdr_reserve_space(xdr, nbytes);
 743         BUG_ON(!p);
 744         return p;
 745 }
 746
 747 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 748 {
 749         __be32 *p;
 750
 751         p = xdr_reserve_space(xdr, 4 + len);
 752         BUG_ON(p == NULL);
 753         xdr_encode_opaque(p, str, len);
 754 }
 755
 756 static void encode_compound_hdr(struct xdr_stream *xdr,
 757                                 struct rpc_rqst *req,
 758                                 struct compound_hdr *hdr)
 759 {
 760         __be32 *p;
 761         struct rpc_auth *auth = req->rq_cred->cr_auth;
 762
 763         /* initialize running count of expected bytes in reply.
 764          * NOTE: the replied tag SHOULD be the same is the one sent,
 765          * but this is not required as a MUST for the server to do so. */
 766         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 767
 768         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 769         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 770         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 771         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 772         *p++ = cpu_to_be32(hdr->minorversion);
 773         hdr->nops_p = p;
 774         *p = cpu_to_be32(hdr->nops);
 775 }
 776
 777 static void encode_nops(struct compound_hdr *hdr)
 778 {
 779         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 780         *hdr->nops_p = htonl(hdr->nops);
 781 }
 782
 783 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 784 {
 785         __be32 *p;
 786
 787         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 788         BUG_ON(p == NULL);
 789         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 790 }
 791
 792 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 793 {
 794         char owner_name[IDMAP_NAMESZ];
 795         char owner_group[IDMAP_NAMESZ];
 796         int owner_namelen = 0;
 797         int owner_grouplen = 0;
 798         __be32 *p;
 799         __be32 *q;
 800         int len;
 801         uint32_t bmval0 = 0;
 802         uint32_t bmval1 = 0;
 803
 804         /*
 805          * We reserve enough space to write the entire attribute buffer at once.
 806          * In the worst-case, this would be
 807          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 808          *          = 36 bytes, plus any contribution from variable-length fields
 809          *            such as owner/group.
 810          */
 811         len = 16;
 812
 813         /* Sigh */
 814         if (iap->ia_valid & ATTR_SIZE)
 815                 len += 8;
 816         if (iap->ia_valid & ATTR_MODE)
 817                 len += 4;
 818         if (iap->ia_valid & ATTR_UID) {
 819                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 820                 if (owner_namelen < 0) {
 821                         dprintk("nfs: couldn't resolve uid %d to string\n",
 822                                         iap->ia_uid);
 823                         /* XXX */
 824                         strcpy(owner_name, "nobody");
 825                         owner_namelen = sizeof("nobody") - 1;
 826                         /* goto out; */
 827                 }
 828                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 829         }
 830         if (iap->ia_valid & ATTR_GID) {
 831                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 832                 if (owner_grouplen < 0) {
 833                         dprintk("nfs: couldn't resolve gid %d to string\n",
 834                                         iap->ia_gid);
 835                         strcpy(owner_group, "nobody");
 836                         owner_grouplen = sizeof("nobody") - 1;
 837                         /* goto out; */
 838                 }
 839                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 840         }
 841         if (iap->ia_valid & ATTR_ATIME_SET)
 842                 len += 16;
 843         else if (iap->ia_valid & ATTR_ATIME)
 844                 len += 4;
 845         if (iap->ia_valid & ATTR_MTIME_SET)
 846                 len += 16;
 847         else if (iap->ia_valid & ATTR_MTIME)
 848                 len += 4;
 849         p = reserve_space(xdr, len);
 850
 851         /*
 852          * We write the bitmap length now, but leave the bitmap and the attribute
 853          * buffer length to be backfilled at the end of this routine.
 854          */
 855         *p++ = cpu_to_be32(2);
 856         q = p;
 857         p += 3;
 858
 859         if (iap->ia_valid & ATTR_SIZE) {
 860                 bmval0 |= FATTR4_WORD0_SIZE;
 861                 p = xdr_encode_hyper(p, iap->ia_size);
 862         }
 863         if (iap->ia_valid & ATTR_MODE) {
 864                 bmval1 |= FATTR4_WORD1_MODE;
 865                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 866         }
 867         if (iap->ia_valid & ATTR_UID) {
 868                 bmval1 |= FATTR4_WORD1_OWNER;
 869                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 870         }
 871         if (iap->ia_valid & ATTR_GID) {
 872                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 873                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 874         }
 875         if (iap->ia_valid & ATTR_ATIME_SET) {
 876                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 877                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 878                 *p++ = cpu_to_be32(0);
 879                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 880                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 881         }
 882         else if (iap->ia_valid & ATTR_ATIME) {
 883                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 884                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 885         }
 886         if (iap->ia_valid & ATTR_MTIME_SET) {
 887                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 888                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 889                 *p++ = cpu_to_be32(0);
 890                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 891                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 892         }
 893         else if (iap->ia_valid & ATTR_MTIME) {
 894                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 895                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 896         }
 897
 898         /*
 899          * Now we backfill the bitmap and the attribute buffer length.
 900          */
 901         if (len != ((char *)p - (char *)q) + 4) {
 902                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 903                                 len, ((char *)p - (char *)q) + 4);
 904                 BUG();
 905         }
 906         len = (char *)p - (char *)q - 12;
 907         *q++ = htonl(bmval0);
 908         *q++ = htonl(bmval1);
 909         *q = htonl(len);
 910
 911 /* out: */
 912 }
 913
 914 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 915 {
 916         __be32 *p;
 917
 918         p = reserve_space(xdr, 8);
 919         *p++ = cpu_to_be32(OP_ACCESS);
 920         *p = cpu_to_be32(access);
 921         hdr->nops++;
 922         hdr->replen += decode_access_maxsz;
 923 }
 924
 925 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 926 {
 927         __be32 *p;
 928
 929         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 930         *p++ = cpu_to_be32(OP_CLOSE);
 931         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 932         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 933         hdr->nops++;
 934         hdr->replen += decode_close_maxsz;
 935 }
 936
 937 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 938 {
 939         __be32 *p;
 940
 941         p = reserve_space(xdr, 16);
 942         *p++ = cpu_to_be32(OP_COMMIT);
 943         p = xdr_encode_hyper(p, args->offset);
 944         *p = cpu_to_be32(args->count);
 945         hdr->nops++;
 946         hdr->replen += decode_commit_maxsz;
 947 }
 948
 949 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 950 {
 951         __be32 *p;
 952
 953         p = reserve_space(xdr, 8);
 954         *p++ = cpu_to_be32(OP_CREATE);
 955         *p = cpu_to_be32(create->ftype);
 956
 957         switch (create->ftype) {
 958         case NF4LNK:
 959                 p = reserve_space(xdr, 4);
 960                 *p = cpu_to_be32(create->u.symlink.len);
 961                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 962                 break;
 963
 964         case NF4BLK: case NF4CHR:
 965                 p = reserve_space(xdr, 8);
 966                 *p++ = cpu_to_be32(create->u.device.specdata1);
 967                 *p = cpu_to_be32(create->u.device.specdata2);
 968                 break;
 969
 970         default:
 971                 break;
 972         }
 973
 974         encode_string(xdr, create->name->len, create->name->name);
 975         hdr->nops++;
 976         hdr->replen += decode_create_maxsz;
 977
 978         encode_attrs(xdr, create->attrs, create->server);
 979 }
 980
 981 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 982 {
 983         __be32 *p;
 984
 985         p = reserve_space(xdr, 12);
 986         *p++ = cpu_to_be32(OP_GETATTR);
 987         *p++ = cpu_to_be32(1);
 988         *p = cpu_to_be32(bitmap);
 989         hdr->nops++;
 990         hdr->replen += decode_getattr_maxsz;
 991 }
 992
 993 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 994 {
 995         __be32 *p;
 996
 997         p = reserve_space(xdr, 16);
 998         *p++ = cpu_to_be32(OP_GETATTR);
 999         *p++ = cpu_to_be32(2);
1000         *p++ = cpu_to_be32(bm0);
1001         *p = cpu_to_be32(bm1);
1002         hdr->nops++;
1003         hdr->replen += decode_getattr_maxsz;
1004 }
1005
1006 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1007 {
1008         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1009                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1010 }
1011
1012 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1013 {
1014         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1015                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1016 }
1017
1018 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1019 {
1020         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1021                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1022 }
1023
1024 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1025 {
1026         __be32 *p;
1027
1028         p = reserve_space(xdr, 4);
1029         *p = cpu_to_be32(OP_GETFH);
1030         hdr->nops++;
1031         hdr->replen += decode_getfh_maxsz;
1032 }
1033
1034 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1035 {
1036         __be32 *p;
1037
1038         p = reserve_space(xdr, 8 + name->len);
1039         *p++ = cpu_to_be32(OP_LINK);
1040         xdr_encode_opaque(p, name->name, name->len);
1041         hdr->nops++;
1042         hdr->replen += decode_link_maxsz;
1043 }
1044
1045 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1046 {
1047         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1048                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1049         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1050 }
1051
1052 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1053 {
1054         if (fl->fl_end == OFFSET_MAX)
1055                 return ~(uint64_t)0;
1056         return fl->fl_end - fl->fl_start + 1;
1057 }
1058
1059 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1060 {
1061         __be32 *p;
1062
1063         p = reserve_space(xdr, 28);
1064         p = xdr_encode_hyper(p, lowner->clientid);
1065         *p++ = cpu_to_be32(16);
1066         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1067         xdr_encode_hyper(p, lowner->id);
1068 }
1069
1070 /*
1071  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1072  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1073  */
1074 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1075 {
1076         __be32 *p;
1077
1078         p = reserve_space(xdr, 32);
1079         *p++ = cpu_to_be32(OP_LOCK);
1080         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1081         *p++ = cpu_to_be32(args->reclaim);
1082         p = xdr_encode_hyper(p, args->fl->fl_start);
1083         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1084         *p = cpu_to_be32(args->new_lock_owner);
1085         if (args->new_lock_owner){
1086                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1087                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1088                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1089                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1090                 encode_lockowner(xdr, &args->lock_owner);
1091         }
1092         else {
1093                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1094                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1095                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1096         }
1097         hdr->nops++;
1098         hdr->replen += decode_lock_maxsz;
1099 }
1100
1101 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1102 {
1103         __be32 *p;
1104
1105         p = reserve_space(xdr, 24);
1106         *p++ = cpu_to_be32(OP_LOCKT);
1107         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1108         p = xdr_encode_hyper(p, args->fl->fl_start);
1109         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1110         encode_lockowner(xdr, &args->lock_owner);
1111         hdr->nops++;
1112         hdr->replen += decode_lockt_maxsz;
1113 }
1114
1115 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1116 {
1117         __be32 *p;
1118
1119         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1120         *p++ = cpu_to_be32(OP_LOCKU);
1121         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1122         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1123         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1124         p = xdr_encode_hyper(p, args->fl->fl_start);
1125         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1126         hdr->nops++;
1127         hdr->replen += decode_locku_maxsz;
1128 }
1129
1130 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1131 {
1132         __be32 *p;
1133
1134         p = reserve_space(xdr, 4);
1135         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1136         encode_lockowner(xdr, lowner);
1137         hdr->nops++;
1138         hdr->replen += decode_release_lockowner_maxsz;
1139 }
1140
1141 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1142 {
1143         int len = name->len;
1144         __be32 *p;
1145
1146         p = reserve_space(xdr, 8 + len);
1147         *p++ = cpu_to_be32(OP_LOOKUP);
1148         xdr_encode_opaque(p, name->name, len);
1149         hdr->nops++;
1150         hdr->replen += decode_lookup_maxsz;
1151 }
1152
1153 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1154 {
1155         __be32 *p;
1156
1157         p = reserve_space(xdr, 8);
1158         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1159         case FMODE_READ:
1160                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1161                 break;
1162         case FMODE_WRITE:
1163                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1164                 break;
1165         case FMODE_READ|FMODE_WRITE:
1166                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1167                 break;
1168         default:
1169                 *p++ = cpu_to_be32(0);
1170         }
1171         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1172 }
1173
1174 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1175 {
1176         __be32 *p;
1177  /*
1178  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1179  * owner 4 = 32
1180  */
1181         p = reserve_space(xdr, 8);
1182         *p++ = cpu_to_be32(OP_OPEN);
1183         *p = cpu_to_be32(arg->seqid->sequence->counter);
1184         encode_share_access(xdr, arg->fmode);
1185         p = reserve_space(xdr, 28);
1186         p = xdr_encode_hyper(p, arg->clientid);
1187         *p++ = cpu_to_be32(16);
1188         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1189         xdr_encode_hyper(p, arg->id);
1190 }
1191
1192 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1193 {
1194         __be32 *p;
1195         struct nfs_client *clp;
1196
1197         p = reserve_space(xdr, 4);
1198         switch(arg->open_flags & O_EXCL) {
1199         case 0:
1200                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1201                 encode_attrs(xdr, arg->u.attrs, arg->server);
1202                 break;
1203         default:
1204                 clp = arg->server->nfs_client;
1205                 if (clp->cl_mvops->minor_version > 0) {
1206                         if (nfs4_has_persistent_session(clp)) {
1207                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1208                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1209                         } else {
1210                                 struct iattr dummy;
1211
1212                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1213                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1214                                 dummy.ia_valid = 0;
1215                                 encode_attrs(xdr, &dummy, arg->server);
1216                         }
1217                 } else {
1218                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1219                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1220                 }
1221         }
1222 }
1223
1224 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1225 {
1226         __be32 *p;
1227
1228         p = reserve_space(xdr, 4);
1229         switch (arg->open_flags & O_CREAT) {
1230         case 0:
1231                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1232                 break;
1233         default:
1234                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1235                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1236                 encode_createmode(xdr, arg);
1237         }
1238 }
1239
1240 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1241 {
1242         __be32 *p;
1243
1244         p = reserve_space(xdr, 4);
1245         switch (delegation_type) {
1246         case 0:
1247                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1248                 break;
1249         case FMODE_READ:
1250                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1251                 break;
1252         case FMODE_WRITE|FMODE_READ:
1253                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1254                 break;
1255         default:
1256                 BUG();
1257         }
1258 }
1259
1260 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1261 {
1262         __be32 *p;
1263
1264         p = reserve_space(xdr, 4);
1265         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1266         encode_string(xdr, name->len, name->name);
1267 }
1268
1269 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1270 {
1271         __be32 *p;
1272
1273         p = reserve_space(xdr, 4);
1274         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1275         encode_delegation_type(xdr, type);
1276 }
1277
1278 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1279 {
1280         __be32 *p;
1281
1282         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1283         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1284         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1285         encode_string(xdr, name->len, name->name);
1286 }
1287
1288 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1289 {
1290         encode_openhdr(xdr, arg);
1291         encode_opentype(xdr, arg);
1292         switch (arg->claim) {
1293         case NFS4_OPEN_CLAIM_NULL:
1294                 encode_claim_null(xdr, arg->name);
1295                 break;
1296         case NFS4_OPEN_CLAIM_PREVIOUS:
1297                 encode_claim_previous(xdr, arg->u.delegation_type);
1298                 break;
1299         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1300                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1301                 break;
1302         default:
1303                 BUG();
1304         }
1305         hdr->nops++;
1306         hdr->replen += decode_open_maxsz;
1307 }
1308
1309 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1310 {
1311         __be32 *p;
1312
1313         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1314         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1315         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1316         *p = cpu_to_be32(arg->seqid->sequence->counter);
1317         hdr->nops++;
1318         hdr->replen += decode_open_confirm_maxsz;
1319 }
1320
1321 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1322 {
1323         __be32 *p;
1324
1325         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1326         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1327         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1328         *p = cpu_to_be32(arg->seqid->sequence->counter);
1329         encode_share_access(xdr, arg->fmode);
1330         hdr->nops++;
1331         hdr->replen += decode_open_downgrade_maxsz;
1332 }
1333
1334 static void
1335 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1336 {
1337         int len = fh->size;
1338         __be32 *p;
1339
1340         p = reserve_space(xdr, 8 + len);
1341         *p++ = cpu_to_be32(OP_PUTFH);
1342         xdr_encode_opaque(p, fh->data, len);
1343         hdr->nops++;
1344         hdr->replen += decode_putfh_maxsz;
1345 }
1346
1347 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1348 {
1349         __be32 *p;
1350
1351         p = reserve_space(xdr, 4);
1352         *p = cpu_to_be32(OP_PUTROOTFH);
1353         hdr->nops++;
1354         hdr->replen += decode_putrootfh_maxsz;
1355 }
1356
1357 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1358 {
1359         nfs4_stateid stateid;
1360         __be32 *p;
1361
1362         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1363         if (ctx->state != NULL) {
1364                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1365                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1366         } else
1367                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1368 }
1369
1370 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1371 {
1372         __be32 *p;
1373
1374         p = reserve_space(xdr, 4);
1375         *p = cpu_to_be32(OP_READ);
1376
1377         encode_stateid(xdr, args->context, args->lock_context);
1378
1379         p = reserve_space(xdr, 12);
1380         p = xdr_encode_hyper(p, args->offset);
1381         *p = cpu_to_be32(args->count);
1382         hdr->nops++;
1383         hdr->replen += decode_read_maxsz;
1384 }
1385
1386 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1387 {
1388         uint32_t attrs[2] = {0, 0};
1389         __be32 *p;
1390
1391         if (readdir->plus) {
1392                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1393                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1394                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1395                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1396                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1397                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1398         }
1399         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1400         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1401
1402         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1403         *p++ = cpu_to_be32(OP_READDIR);
1404         p = xdr_encode_hyper(p, readdir->cookie);
1405         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1406         *p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
1407         *p++ = cpu_to_be32(readdir->count);
1408         *p++ = cpu_to_be32(2);
1409
1410         if (!readdir->plus) {
1411                 /* Switch to mounted_on_fileid if the server supports it */
1412                 if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1413                         attrs[0] &= ~FATTR4_WORD0_FILEID;
1414                 else
1415                         attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1416         }
1417
1418         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1419         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1420         hdr->nops++;
1421         hdr->replen += decode_readdir_maxsz;
1422         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1423                         __func__,
1424                         (unsigned long long)readdir->cookie,
1425                         ((u32 *)readdir->verifier.data)[0],
1426                         ((u32 *)readdir->verifier.data)[1],
1427                         attrs[0] & readdir->bitmask[0],
1428                         attrs[1] & readdir->bitmask[1]);
1429 }
1430
1431 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1432 {
1433         __be32 *p;
1434
1435         p = reserve_space(xdr, 4);
1436         *p = cpu_to_be32(OP_READLINK);
1437         hdr->nops++;
1438         hdr->replen += decode_readlink_maxsz;
1439 }
1440
1441 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1442 {
1443         __be32 *p;
1444
1445         p = reserve_space(xdr, 8 + name->len);
1446         *p++ = cpu_to_be32(OP_REMOVE);
1447         xdr_encode_opaque(p, name->name, name->len);
1448         hdr->nops++;
1449         hdr->replen += decode_remove_maxsz;
1450 }
1451
1452 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1453 {
1454         __be32 *p;
1455
1456         p = reserve_space(xdr, 4);
1457         *p = cpu_to_be32(OP_RENAME);
1458         encode_string(xdr, oldname->len, oldname->name);
1459         encode_string(xdr, newname->len, newname->name);
1460         hdr->nops++;
1461         hdr->replen += decode_rename_maxsz;
1462 }
1463
1464 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1465 {
1466         __be32 *p;
1467
1468         p = reserve_space(xdr, 12);
1469         *p++ = cpu_to_be32(OP_RENEW);
1470         xdr_encode_hyper(p, client_stateid->cl_clientid);
1471         hdr->nops++;
1472         hdr->replen += decode_renew_maxsz;
1473 }
1474
1475 static void
1476 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1477 {
1478         __be32 *p;
1479
1480         p = reserve_space(xdr, 4);
1481         *p = cpu_to_be32(OP_RESTOREFH);
1482         hdr->nops++;
1483         hdr->replen += decode_restorefh_maxsz;
1484 }
1485
1486 static int
1487 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1488 {
1489         __be32 *p;
1490
1491         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1492         *p++ = cpu_to_be32(OP_SETATTR);
1493         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1494         p = reserve_space(xdr, 2*4);
1495         *p++ = cpu_to_be32(1);
1496         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1497         if (arg->acl_len % 4)
1498                 return -EINVAL;
1499         p = reserve_space(xdr, 4);
1500         *p = cpu_to_be32(arg->acl_len);
1501         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1502         hdr->nops++;
1503         hdr->replen += decode_setacl_maxsz;
1504         return 0;
1505 }
1506
1507 static void
1508 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1509 {
1510         __be32 *p;
1511
1512         p = reserve_space(xdr, 4);
1513         *p = cpu_to_be32(OP_SAVEFH);
1514         hdr->nops++;
1515         hdr->replen += decode_savefh_maxsz;
1516 }
1517
1518 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1519 {
1520         __be32 *p;
1521
1522         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1523         *p++ = cpu_to_be32(OP_SETATTR);
1524         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1525         hdr->nops++;
1526         hdr->replen += decode_setattr_maxsz;
1527         encode_attrs(xdr, arg->iap, server);
1528 }
1529
1530 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1535         *p++ = cpu_to_be32(OP_SETCLIENTID);
1536         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1537
1538         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1539         p = reserve_space(xdr, 4);
1540         *p = cpu_to_be32(setclientid->sc_prog);
1541         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1542         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1543         p = reserve_space(xdr, 4);
1544         *p = cpu_to_be32(setclientid->sc_cb_ident);
1545         hdr->nops++;
1546         hdr->replen += decode_setclientid_maxsz;
1547 }
1548
1549 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1550 {
1551         __be32 *p;
1552
1553         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1554         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1555         p = xdr_encode_hyper(p, arg->clientid);
1556         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1557         hdr->nops++;
1558         hdr->replen += decode_setclientid_confirm_maxsz;
1559 }
1560
1561 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1562 {
1563         __be32 *p;
1564
1565         p = reserve_space(xdr, 4);
1566         *p = cpu_to_be32(OP_WRITE);
1567
1568         encode_stateid(xdr, args->context, args->lock_context);
1569
1570         p = reserve_space(xdr, 16);
1571         p = xdr_encode_hyper(p, args->offset);
1572         *p++ = cpu_to_be32(args->stable);
1573         *p = cpu_to_be32(args->count);
1574
1575         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1576         hdr->nops++;
1577         hdr->replen += decode_write_maxsz;
1578 }
1579
1580 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1581 {
1582         __be32 *p;
1583
1584         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1585
1586         *p++ = cpu_to_be32(OP_DELEGRETURN);
1587         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1588         hdr->nops++;
1589         hdr->replen += decode_delegreturn_maxsz;
1590 }
1591
1592 #if defined(CONFIG_NFS_V4_1)
1593 /* NFSv4.1 operations */
1594 static void encode_exchange_id(struct xdr_stream *xdr,
1595                                struct nfs41_exchange_id_args *args,
1596                                struct compound_hdr *hdr)
1597 {
1598         __be32 *p;
1599
1600         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1601         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1602         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1603
1604         encode_string(xdr, args->id_len, args->id);
1605
1606         p = reserve_space(xdr, 12);
1607         *p++ = cpu_to_be32(args->flags);
1608         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1609         *p = cpu_to_be32(0);    /* zero length implementation id array */
1610         hdr->nops++;
1611         hdr->replen += decode_exchange_id_maxsz;
1612 }
1613
1614 static void encode_create_session(struct xdr_stream *xdr,
1615                                   struct nfs41_create_session_args *args,
1616                                   struct compound_hdr *hdr)
1617 {
1618         __be32 *p;
1619         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1620         uint32_t len;
1621         struct nfs_client *clp = args->client;
1622         u32 max_resp_sz_cached;
1623
1624         /*
1625          * Assumes OPEN is the biggest non-idempotent compound.
1626          * 2 is the verifier.
1627          */
1628         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1629                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1630
1631         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1632                         clp->cl_ipaddr);
1633
1634         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1635         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1636         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1637         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1638         *p++ = cpu_to_be32(args->flags);                        /*flags */
1639
1640         /* Fore Channel */
1641         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1642         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1643         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1644         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1645         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1646         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1647         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1648
1649         /* Back Channel */
1650         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1651         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1652         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1653         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1654         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1655         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1656         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1657
1658         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1659         *p++ = cpu_to_be32(1);
1660         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1661
1662         /* authsys_parms rfc1831 */
1663         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1664         p = xdr_encode_opaque(p, machine_name, len);
1665         *p++ = cpu_to_be32(0);                          /* UID */
1666         *p++ = cpu_to_be32(0);                          /* GID */
1667         *p = cpu_to_be32(0);                            /* No more gids */
1668         hdr->nops++;
1669         hdr->replen += decode_create_session_maxsz;
1670 }
1671
1672 static void encode_destroy_session(struct xdr_stream *xdr,
1673                                    struct nfs4_session *session,
1674                                    struct compound_hdr *hdr)
1675 {
1676         __be32 *p;
1677         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1678         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1679         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1680         hdr->nops++;
1681         hdr->replen += decode_destroy_session_maxsz;
1682 }
1683
1684 static void encode_reclaim_complete(struct xdr_stream *xdr,
1685                                     struct nfs41_reclaim_complete_args *args,
1686                                     struct compound_hdr *hdr)
1687 {
1688         __be32 *p;
1689
1690         p = reserve_space(xdr, 8);
1691         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1692         *p++ = cpu_to_be32(args->one_fs);
1693         hdr->nops++;
1694         hdr->replen += decode_reclaim_complete_maxsz;
1695 }
1696 #endif /* CONFIG_NFS_V4_1 */
1697
1698 static void encode_sequence(struct xdr_stream *xdr,
1699                             const struct nfs4_sequence_args *args,
1700                             struct compound_hdr *hdr)
1701 {
1702 #if defined(CONFIG_NFS_V4_1)
1703         struct nfs4_session *session = args->sa_session;
1704         struct nfs4_slot_table *tp;
1705         struct nfs4_slot *slot;
1706         __be32 *p;
1707
1708         if (!session)
1709                 return;
1710
1711         tp = &session->fc_slot_table;
1712
1713         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1714         slot = tp->slots + args->sa_slotid;
1715
1716         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1717         *p++ = cpu_to_be32(OP_SEQUENCE);
1718
1719         /*
1720          * Sessionid + seqid + slotid + max slotid + cache_this
1721          */
1722         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1723                 "max_slotid=%d cache_this=%d\n",
1724                 __func__,
1725                 ((u32 *)session->sess_id.data)[0],
1726                 ((u32 *)session->sess_id.data)[1],
1727                 ((u32 *)session->sess_id.data)[2],
1728                 ((u32 *)session->sess_id.data)[3],
1729                 slot->seq_nr, args->sa_slotid,
1730                 tp->highest_used_slotid, args->sa_cache_this);
1731         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1732         *p++ = cpu_to_be32(slot->seq_nr);
1733         *p++ = cpu_to_be32(args->sa_slotid);
1734         *p++ = cpu_to_be32(tp->highest_used_slotid);
1735         *p = cpu_to_be32(args->sa_cache_this);
1736         hdr->nops++;
1737         hdr->replen += decode_sequence_maxsz;
1738 #endif /* CONFIG_NFS_V4_1 */
1739 }
1740
1741 /*
1742  * END OF "GENERIC" ENCODE ROUTINES.
1743  */
1744
1745 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1746 {
1747 #if defined(CONFIG_NFS_V4_1)
1748         if (args->sa_session)
1749                 return args->sa_session->clp->cl_mvops->minor_version;
1750 #endif /* CONFIG_NFS_V4_1 */
1751         return 0;
1752 }
1753
1754 /*
1755  * Encode an ACCESS request
1756  */
1757 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *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_putfh(&xdr, args->fh, &hdr);
1768         encode_access(&xdr, args->access, &hdr);
1769         encode_getfattr(&xdr, args->bitmask, &hdr);
1770         encode_nops(&hdr);
1771         return 0;
1772 }
1773
1774 /*
1775  * Encode LOOKUP request
1776  */
1777 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *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->dir_fh, &hdr);
1788         encode_lookup(&xdr, args->name, &hdr);
1789         encode_getfh(&xdr, &hdr);
1790         encode_getfattr(&xdr, args->bitmask, &hdr);
1791         encode_nops(&hdr);
1792         return 0;
1793 }
1794
1795 /*
1796  * Encode LOOKUP_ROOT request
1797  */
1798 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1799 {
1800         struct xdr_stream xdr;
1801         struct compound_hdr hdr = {
1802                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1803         };
1804
1805         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1806         encode_compound_hdr(&xdr, req, &hdr);
1807         encode_sequence(&xdr, &args->seq_args, &hdr);
1808         encode_putrootfh(&xdr, &hdr);
1809         encode_getfh(&xdr, &hdr);
1810         encode_getfattr(&xdr, args->bitmask, &hdr);
1811         encode_nops(&hdr);
1812         return 0;
1813 }
1814
1815 /*
1816  * Encode REMOVE request
1817  */
1818 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1819 {
1820         struct xdr_stream xdr;
1821         struct compound_hdr hdr = {
1822                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1823         };
1824
1825         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1826         encode_compound_hdr(&xdr, req, &hdr);
1827         encode_sequence(&xdr, &args->seq_args, &hdr);
1828         encode_putfh(&xdr, args->fh, &hdr);
1829         encode_remove(&xdr, &args->name, &hdr);
1830         encode_getfattr(&xdr, args->bitmask, &hdr);
1831         encode_nops(&hdr);
1832         return 0;
1833 }
1834
1835 /*
1836  * Encode RENAME request
1837  */
1838 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
1839 {
1840         struct xdr_stream xdr;
1841         struct compound_hdr hdr = {
1842                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1843         };
1844
1845         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1846         encode_compound_hdr(&xdr, req, &hdr);
1847         encode_sequence(&xdr, &args->seq_args, &hdr);
1848         encode_putfh(&xdr, args->old_dir, &hdr);
1849         encode_savefh(&xdr, &hdr);
1850         encode_putfh(&xdr, args->new_dir, &hdr);
1851         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1852         encode_getfattr(&xdr, args->bitmask, &hdr);
1853         encode_restorefh(&xdr, &hdr);
1854         encode_getfattr(&xdr, args->bitmask, &hdr);
1855         encode_nops(&hdr);
1856         return 0;
1857 }
1858
1859 /*
1860  * Encode LINK request
1861  */
1862 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1863 {
1864         struct xdr_stream xdr;
1865         struct compound_hdr hdr = {
1866                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1867         };
1868
1869         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1870         encode_compound_hdr(&xdr, req, &hdr);
1871         encode_sequence(&xdr, &args->seq_args, &hdr);
1872         encode_putfh(&xdr, args->fh, &hdr);
1873         encode_savefh(&xdr, &hdr);
1874         encode_putfh(&xdr, args->dir_fh, &hdr);
1875         encode_link(&xdr, args->name, &hdr);
1876         encode_getfattr(&xdr, args->bitmask, &hdr);
1877         encode_restorefh(&xdr, &hdr);
1878         encode_getfattr(&xdr, args->bitmask, &hdr);
1879         encode_nops(&hdr);
1880         return 0;
1881 }
1882
1883 /*
1884  * Encode CREATE request
1885  */
1886 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1887 {
1888         struct xdr_stream xdr;
1889         struct compound_hdr hdr = {
1890                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1891         };
1892
1893         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1894         encode_compound_hdr(&xdr, req, &hdr);
1895         encode_sequence(&xdr, &args->seq_args, &hdr);
1896         encode_putfh(&xdr, args->dir_fh, &hdr);
1897         encode_savefh(&xdr, &hdr);
1898         encode_create(&xdr, args, &hdr);
1899         encode_getfh(&xdr, &hdr);
1900         encode_getfattr(&xdr, args->bitmask, &hdr);
1901         encode_restorefh(&xdr, &hdr);
1902         encode_getfattr(&xdr, args->bitmask, &hdr);
1903         encode_nops(&hdr);
1904         return 0;
1905 }
1906
1907 /*
1908  * Encode SYMLINK request
1909  */
1910 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1911 {
1912         return nfs4_xdr_enc_create(req, p, args);
1913 }
1914
1915 /*
1916  * Encode GETATTR request
1917  */
1918 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1919 {
1920         struct xdr_stream xdr;
1921         struct compound_hdr hdr = {
1922                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1923         };
1924
1925         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1926         encode_compound_hdr(&xdr, req, &hdr);
1927         encode_sequence(&xdr, &args->seq_args, &hdr);
1928         encode_putfh(&xdr, args->fh, &hdr);
1929         encode_getfattr(&xdr, args->bitmask, &hdr);
1930         encode_nops(&hdr);
1931         return 0;
1932 }
1933
1934 /*
1935  * Encode a CLOSE request
1936  */
1937 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1938 {
1939         struct xdr_stream xdr;
1940         struct compound_hdr hdr = {
1941                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1942         };
1943
1944         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1945         encode_compound_hdr(&xdr, req, &hdr);
1946         encode_sequence(&xdr, &args->seq_args, &hdr);
1947         encode_putfh(&xdr, args->fh, &hdr);
1948         encode_close(&xdr, args, &hdr);
1949         encode_getfattr(&xdr, args->bitmask, &hdr);
1950         encode_nops(&hdr);
1951         return 0;
1952 }
1953
1954 /*
1955  * Encode an OPEN request
1956  */
1957 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1958 {
1959         struct xdr_stream xdr;
1960         struct compound_hdr hdr = {
1961                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1962         };
1963
1964         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1965         encode_compound_hdr(&xdr, req, &hdr);
1966         encode_sequence(&xdr, &args->seq_args, &hdr);
1967         encode_putfh(&xdr, args->fh, &hdr);
1968         encode_savefh(&xdr, &hdr);
1969         encode_open(&xdr, args, &hdr);
1970         encode_getfh(&xdr, &hdr);
1971         encode_getfattr(&xdr, args->bitmask, &hdr);
1972         encode_restorefh(&xdr, &hdr);
1973         encode_getfattr(&xdr, args->bitmask, &hdr);
1974         encode_nops(&hdr);
1975         return 0;
1976 }
1977
1978 /*
1979  * Encode an OPEN_CONFIRM request
1980  */
1981 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1982 {
1983         struct xdr_stream xdr;
1984         struct compound_hdr hdr = {
1985                 .nops   = 0,
1986         };
1987
1988         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1989         encode_compound_hdr(&xdr, req, &hdr);
1990         encode_putfh(&xdr, args->fh, &hdr);
1991         encode_open_confirm(&xdr, args, &hdr);
1992         encode_nops(&hdr);
1993         return 0;
1994 }
1995
1996 /*
1997  * Encode an OPEN request with no attributes.
1998  */
1999 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
2000 {
2001         struct xdr_stream xdr;
2002         struct compound_hdr hdr = {
2003                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2004         };
2005
2006         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2007         encode_compound_hdr(&xdr, req, &hdr);
2008         encode_sequence(&xdr, &args->seq_args, &hdr);
2009         encode_putfh(&xdr, args->fh, &hdr);
2010         encode_open(&xdr, args, &hdr);
2011         encode_getfattr(&xdr, args->bitmask, &hdr);
2012         encode_nops(&hdr);
2013         return 0;
2014 }
2015
2016 /*
2017  * Encode an OPEN_DOWNGRADE request
2018  */
2019 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
2020 {
2021         struct xdr_stream xdr;
2022         struct compound_hdr hdr = {
2023                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2024         };
2025
2026         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2027         encode_compound_hdr(&xdr, req, &hdr);
2028         encode_sequence(&xdr, &args->seq_args, &hdr);
2029         encode_putfh(&xdr, args->fh, &hdr);
2030         encode_open_downgrade(&xdr, args, &hdr);
2031         encode_getfattr(&xdr, args->bitmask, &hdr);
2032         encode_nops(&hdr);
2033         return 0;
2034 }
2035
2036 /*
2037  * Encode a LOCK request
2038  */
2039 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
2040 {
2041         struct xdr_stream xdr;
2042         struct compound_hdr hdr = {
2043                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2044         };
2045
2046         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2047         encode_compound_hdr(&xdr, req, &hdr);
2048         encode_sequence(&xdr, &args->seq_args, &hdr);
2049         encode_putfh(&xdr, args->fh, &hdr);
2050         encode_lock(&xdr, args, &hdr);
2051         encode_nops(&hdr);
2052         return 0;
2053 }
2054
2055 /*
2056  * Encode a LOCKT request
2057  */
2058 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2059 {
2060         struct xdr_stream xdr;
2061         struct compound_hdr hdr = {
2062                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2063         };
2064
2065         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2066         encode_compound_hdr(&xdr, req, &hdr);
2067         encode_sequence(&xdr, &args->seq_args, &hdr);
2068         encode_putfh(&xdr, args->fh, &hdr);
2069         encode_lockt(&xdr, args, &hdr);
2070         encode_nops(&hdr);
2071         return 0;
2072 }
2073
2074 /*
2075  * Encode a LOCKU request
2076  */
2077 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *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_locku(&xdr, args, &hdr);
2089         encode_nops(&hdr);
2090         return 0;
2091 }
2092
2093 static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
2094 {
2095         struct xdr_stream xdr;
2096         struct compound_hdr hdr = {
2097                 .minorversion = 0,
2098         };
2099
2100         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2101         encode_compound_hdr(&xdr, req, &hdr);
2102         encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
2103         encode_nops(&hdr);
2104         return 0;
2105 }
2106
2107 /*
2108  * Encode a READLINK request
2109  */
2110 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2111 {
2112         struct xdr_stream xdr;
2113         struct compound_hdr hdr = {
2114                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2115         };
2116
2117         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2118         encode_compound_hdr(&xdr, req, &hdr);
2119         encode_sequence(&xdr, &args->seq_args, &hdr);
2120         encode_putfh(&xdr, args->fh, &hdr);
2121         encode_readlink(&xdr, args, req, &hdr);
2122
2123         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2124                         args->pgbase, args->pglen);
2125         encode_nops(&hdr);
2126         return 0;
2127 }
2128
2129 /*
2130  * Encode a READDIR request
2131  */
2132 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2133 {
2134         struct xdr_stream xdr;
2135         struct compound_hdr hdr = {
2136                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137         };
2138
2139         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2140         encode_compound_hdr(&xdr, req, &hdr);
2141         encode_sequence(&xdr, &args->seq_args, &hdr);
2142         encode_putfh(&xdr, args->fh, &hdr);
2143         encode_readdir(&xdr, args, req, &hdr);
2144
2145         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2146                          args->pgbase, args->count);
2147         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2148                         __func__, hdr.replen << 2, args->pages,
2149                         args->pgbase, args->count);
2150         encode_nops(&hdr);
2151         return 0;
2152 }
2153
2154 /*
2155  * Encode a READ request
2156  */
2157 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2158 {
2159         struct xdr_stream xdr;
2160         struct compound_hdr hdr = {
2161                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2162         };
2163
2164         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2165         encode_compound_hdr(&xdr, req, &hdr);
2166         encode_sequence(&xdr, &args->seq_args, &hdr);
2167         encode_putfh(&xdr, args->fh, &hdr);
2168         encode_read(&xdr, args, &hdr);
2169
2170         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2171                          args->pages, args->pgbase, args->count);
2172         req->rq_rcv_buf.flags |= XDRBUF_READ;
2173         encode_nops(&hdr);
2174         return 0;
2175 }
2176
2177 /*
2178  * Encode an SETATTR request
2179  */
2180 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2181 {
2182         struct xdr_stream xdr;
2183         struct compound_hdr hdr = {
2184                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2185         };
2186
2187         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2188         encode_compound_hdr(&xdr, req, &hdr);
2189         encode_sequence(&xdr, &args->seq_args, &hdr);
2190         encode_putfh(&xdr, args->fh, &hdr);
2191         encode_setattr(&xdr, args, args->server, &hdr);
2192         encode_getfattr(&xdr, args->bitmask, &hdr);
2193         encode_nops(&hdr);
2194         return 0;
2195 }
2196
2197 /*
2198  * Encode a GETACL request
2199  */
2200 static int
2201 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2202                 struct nfs_getaclargs *args)
2203 {
2204         struct xdr_stream xdr;
2205         struct compound_hdr hdr = {
2206                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2207         };
2208         uint32_t replen;
2209
2210         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2211         encode_compound_hdr(&xdr, req, &hdr);
2212         encode_sequence(&xdr, &args->seq_args, &hdr);
2213         encode_putfh(&xdr, args->fh, &hdr);
2214         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2215         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2216
2217         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2218                 args->acl_pages, args->acl_pgbase, args->acl_len);
2219         encode_nops(&hdr);
2220         return 0;
2221 }
2222
2223 /*
2224  * Encode a WRITE request
2225  */
2226 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2227 {
2228         struct xdr_stream xdr;
2229         struct compound_hdr hdr = {
2230                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231         };
2232
2233         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2234         encode_compound_hdr(&xdr, req, &hdr);
2235         encode_sequence(&xdr, &args->seq_args, &hdr);
2236         encode_putfh(&xdr, args->fh, &hdr);
2237         encode_write(&xdr, args, &hdr);
2238         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2239         encode_getfattr(&xdr, args->bitmask, &hdr);
2240         encode_nops(&hdr);
2241         return 0;
2242 }
2243
2244 /*
2245  *  a COMMIT request
2246  */
2247 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2248 {
2249         struct xdr_stream xdr;
2250         struct compound_hdr hdr = {
2251                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2252         };
2253
2254         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2255         encode_compound_hdr(&xdr, req, &hdr);
2256         encode_sequence(&xdr, &args->seq_args, &hdr);
2257         encode_putfh(&xdr, args->fh, &hdr);
2258         encode_commit(&xdr, args, &hdr);
2259         encode_getfattr(&xdr, args->bitmask, &hdr);
2260         encode_nops(&hdr);
2261         return 0;
2262 }
2263
2264 /*
2265  * FSINFO request
2266  */
2267 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2268 {
2269         struct xdr_stream xdr;
2270         struct compound_hdr hdr = {
2271                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2272         };
2273
2274         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2275         encode_compound_hdr(&xdr, req, &hdr);
2276         encode_sequence(&xdr, &args->seq_args, &hdr);
2277         encode_putfh(&xdr, args->fh, &hdr);
2278         encode_fsinfo(&xdr, args->bitmask, &hdr);
2279         encode_nops(&hdr);
2280         return 0;
2281 }
2282
2283 /*
2284  * a PATHCONF request
2285  */
2286 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2287 {
2288         struct xdr_stream xdr;
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2294         encode_compound_hdr(&xdr, req, &hdr);
2295         encode_sequence(&xdr, &args->seq_args, &hdr);
2296         encode_putfh(&xdr, args->fh, &hdr);
2297         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2298                            &hdr);
2299         encode_nops(&hdr);
2300         return 0;
2301 }
2302
2303 /*
2304  * a STATFS request
2305  */
2306 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2307 {
2308         struct xdr_stream xdr;
2309         struct compound_hdr hdr = {
2310                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2311         };
2312
2313         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2314         encode_compound_hdr(&xdr, req, &hdr);
2315         encode_sequence(&xdr, &args->seq_args, &hdr);
2316         encode_putfh(&xdr, args->fh, &hdr);
2317         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2318                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2319         encode_nops(&hdr);
2320         return 0;
2321 }
2322
2323 /*
2324  * GETATTR_BITMAP request
2325  */
2326 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2327                                     struct nfs4_server_caps_arg *args)
2328 {
2329         struct xdr_stream xdr;
2330         struct compound_hdr hdr = {
2331                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2332         };
2333
2334         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2335         encode_compound_hdr(&xdr, req, &hdr);
2336         encode_sequence(&xdr, &args->seq_args, &hdr);
2337         encode_putfh(&xdr, args->fhandle, &hdr);
2338         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2339                            FATTR4_WORD0_LINK_SUPPORT|
2340                            FATTR4_WORD0_SYMLINK_SUPPORT|
2341                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2342         encode_nops(&hdr);
2343         return 0;
2344 }
2345
2346 /*
2347  * a RENEW request
2348  */
2349 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2350 {
2351         struct xdr_stream xdr;
2352         struct compound_hdr hdr = {
2353                 .nops   = 0,
2354         };
2355
2356         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2357         encode_compound_hdr(&xdr, req, &hdr);
2358         encode_renew(&xdr, clp, &hdr);
2359         encode_nops(&hdr);
2360         return 0;
2361 }
2362
2363 /*
2364  * a SETCLIENTID request
2365  */
2366 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2367 {
2368         struct xdr_stream xdr;
2369         struct compound_hdr hdr = {
2370                 .nops   = 0,
2371         };
2372
2373         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2374         encode_compound_hdr(&xdr, req, &hdr);
2375         encode_setclientid(&xdr, sc, &hdr);
2376         encode_nops(&hdr);
2377         return 0;
2378 }
2379
2380 /*
2381  * a SETCLIENTID_CONFIRM request
2382  */
2383 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
2384 {
2385         struct xdr_stream xdr;
2386         struct compound_hdr hdr = {
2387                 .nops   = 0,
2388         };
2389         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2390
2391         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2392         encode_compound_hdr(&xdr, req, &hdr);
2393         encode_setclientid_confirm(&xdr, arg, &hdr);
2394         encode_putrootfh(&xdr, &hdr);
2395         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2396         encode_nops(&hdr);
2397         return 0;
2398 }
2399
2400 /*
2401  * DELEGRETURN request
2402  */
2403 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2404 {
2405         struct xdr_stream xdr;
2406         struct compound_hdr hdr = {
2407                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2408         };
2409
2410         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2411         encode_compound_hdr(&xdr, req, &hdr);
2412         encode_sequence(&xdr, &args->seq_args, &hdr);
2413         encode_putfh(&xdr, args->fhandle, &hdr);
2414         encode_delegreturn(&xdr, args->stateid, &hdr);
2415         encode_getfattr(&xdr, args->bitmask, &hdr);
2416         encode_nops(&hdr);
2417         return 0;
2418 }
2419
2420 /*
2421  * Encode FS_LOCATIONS request
2422  */
2423 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2424 {
2425         struct xdr_stream xdr;
2426         struct compound_hdr hdr = {
2427                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2428         };
2429         uint32_t replen;
2430
2431         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2432         encode_compound_hdr(&xdr, req, &hdr);
2433         encode_sequence(&xdr, &args->seq_args, &hdr);
2434         encode_putfh(&xdr, args->dir_fh, &hdr);
2435         encode_lookup(&xdr, args->name, &hdr);
2436         replen = hdr.replen;    /* get the attribute into args->page */
2437         encode_fs_locations(&xdr, args->bitmask, &hdr);
2438
2439         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2440                         0, PAGE_SIZE);
2441         encode_nops(&hdr);
2442         return 0;
2443 }
2444
2445 #if defined(CONFIG_NFS_V4_1)
2446 /*
2447  * EXCHANGE_ID request
2448  */
2449 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2450                                     struct nfs41_exchange_id_args *args)
2451 {
2452         struct xdr_stream xdr;
2453         struct compound_hdr hdr = {
2454                 .minorversion = args->client->cl_mvops->minor_version,
2455         };
2456
2457         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2458         encode_compound_hdr(&xdr, req, &hdr);
2459         encode_exchange_id(&xdr, args, &hdr);
2460         encode_nops(&hdr);
2461         return 0;
2462 }
2463
2464 /*
2465  * a CREATE_SESSION request
2466  */
2467 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2468                                        struct nfs41_create_session_args *args)
2469 {
2470         struct xdr_stream xdr;
2471         struct compound_hdr hdr = {
2472                 .minorversion = args->client->cl_mvops->minor_version,
2473         };
2474
2475         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2476         encode_compound_hdr(&xdr, req, &hdr);
2477         encode_create_session(&xdr, args, &hdr);
2478         encode_nops(&hdr);
2479         return 0;
2480 }
2481
2482 /*
2483  * a DESTROY_SESSION request
2484  */
2485 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2486                                         struct nfs4_session *session)
2487 {
2488         struct xdr_stream xdr;
2489         struct compound_hdr hdr = {
2490                 .minorversion = session->clp->cl_mvops->minor_version,
2491         };
2492
2493         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2494         encode_compound_hdr(&xdr, req, &hdr);
2495         encode_destroy_session(&xdr, session, &hdr);
2496         encode_nops(&hdr);
2497         return 0;
2498 }
2499
2500 /*
2501  * a SEQUENCE request
2502  */
2503 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2504                                  struct nfs4_sequence_args *args)
2505 {
2506         struct xdr_stream xdr;
2507         struct compound_hdr hdr = {
2508                 .minorversion = nfs4_xdr_minorversion(args),
2509         };
2510
2511         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2512         encode_compound_hdr(&xdr, req, &hdr);
2513         encode_sequence(&xdr, args, &hdr);
2514         encode_nops(&hdr);
2515         return 0;
2516 }
2517
2518 /*
2519  * a GET_LEASE_TIME request
2520  */
2521 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2522                                        struct nfs4_get_lease_time_args *args)
2523 {
2524         struct xdr_stream xdr;
2525         struct compound_hdr hdr = {
2526                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2527         };
2528         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2529
2530         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2531         encode_compound_hdr(&xdr, req, &hdr);
2532         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2533         encode_putrootfh(&xdr, &hdr);
2534         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2535         encode_nops(&hdr);
2536         return 0;
2537 }
2538
2539 /*
2540  * a RECLAIM_COMPLETE request
2541  */
2542 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2543                                      struct nfs41_reclaim_complete_args *args)
2544 {
2545         struct xdr_stream xdr;
2546         struct compound_hdr hdr = {
2547                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2548         };
2549
2550         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2551         encode_compound_hdr(&xdr, req, &hdr);
2552         encode_sequence(&xdr, &args->seq_args, &hdr);
2553         encode_reclaim_complete(&xdr, args, &hdr);
2554         encode_nops(&hdr);
2555         return 0;
2556 }
2557
2558 #endif /* CONFIG_NFS_V4_1 */
2559
2560 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2561 {
2562         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2563                 "Remaining buffer length is %tu words.\n",
2564                 func, xdr->end - xdr->p);
2565 }
2566
2567 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2568 {
2569         __be32 *p;
2570
2571         p = xdr_inline_decode(xdr, 4);
2572         if (unlikely(!p))
2573                 goto out_overflow;
2574         *len = be32_to_cpup(p);
2575         p = xdr_inline_decode(xdr, *len);
2576         if (unlikely(!p))
2577                 goto out_overflow;
2578         *string = (char *)p;
2579         return 0;
2580 out_overflow:
2581         print_overflow_msg(__func__, xdr);
2582         return -EIO;
2583 }
2584
2585 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2586 {
2587         __be32 *p;
2588
2589         p = xdr_inline_decode(xdr, 8);
2590         if (unlikely(!p))
2591                 goto out_overflow;
2592         hdr->status = be32_to_cpup(p++);
2593         hdr->taglen = be32_to_cpup(p);
2594
2595         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2596         if (unlikely(!p))
2597                 goto out_overflow;
2598         hdr->tag = (char *)p;
2599         p += XDR_QUADLEN(hdr->taglen);
2600         hdr->nops = be32_to_cpup(p);
2601         if (unlikely(hdr->nops < 1))
2602                 return nfs4_stat_to_errno(hdr->status);
2603         return 0;
2604 out_overflow:
2605         print_overflow_msg(__func__, xdr);
2606         return -EIO;
2607 }
2608
2609 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2610 {
2611         __be32 *p;
2612         uint32_t opnum;
2613         int32_t nfserr;
2614
2615         p = xdr_inline_decode(xdr, 8);
2616         if (unlikely(!p))
2617                 goto out_overflow;
2618         opnum = be32_to_cpup(p++);
2619         if (opnum != expected) {
2620                 dprintk("nfs: Server returned operation"
2621                         " %d but we issued a request for %d\n",
2622                                 opnum, expected);
2623                 return -EIO;
2624         }
2625         nfserr = be32_to_cpup(p);
2626         if (nfserr != NFS_OK)
2627                 return nfs4_stat_to_errno(nfserr);
2628         return 0;
2629 out_overflow:
2630         print_overflow_msg(__func__, xdr);
2631         return -EIO;
2632 }
2633
2634 /* Dummy routine */
2635 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2636 {
2637         __be32 *p;
2638         unsigned int strlen;
2639         char *str;
2640
2641         p = xdr_inline_decode(xdr, 12);
2642         if (likely(p))
2643                 return decode_opaque_inline(xdr, &strlen, &str);
2644         print_overflow_msg(__func__, xdr);
2645         return -EIO;
2646 }
2647
2648 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2649 {
2650         uint32_t bmlen;
2651         __be32 *p;
2652
2653         p = xdr_inline_decode(xdr, 4);
2654         if (unlikely(!p))
2655                 goto out_overflow;
2656         bmlen = be32_to_cpup(p);
2657
2658         bitmap[0] = bitmap[1] = 0;
2659         p = xdr_inline_decode(xdr, (bmlen << 2));
2660         if (unlikely(!p))
2661                 goto out_overflow;
2662         if (bmlen > 0) {
2663                 bitmap[0] = be32_to_cpup(p++);
2664                 if (bmlen > 1)
2665                         bitmap[1] = be32_to_cpup(p);
2666         }
2667         return 0;
2668 out_overflow:
2669         print_overflow_msg(__func__, xdr);
2670         return -EIO;
2671 }
2672
2673 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2674 {
2675         __be32 *p;
2676
2677         p = xdr_inline_decode(xdr, 4);
2678         if (unlikely(!p))
2679                 goto out_overflow;
2680         *attrlen = be32_to_cpup(p);
2681         *savep = xdr->p;
2682         return 0;
2683 out_overflow:
2684         print_overflow_msg(__func__, xdr);
2685         return -EIO;
2686 }
2687
2688 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2689 {
2690         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2691                 decode_attr_bitmap(xdr, bitmask);
2692                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2693         } else
2694                 bitmask[0] = bitmask[1] = 0;
2695         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2696         return 0;
2697 }
2698
2699 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2700 {
2701         __be32 *p;
2702         int ret = 0;
2703
2704         *type = 0;
2705         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2706                 return -EIO;
2707         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2708                 p = xdr_inline_decode(xdr, 4);
2709                 if (unlikely(!p))
2710                         goto out_overflow;
2711                 *type = be32_to_cpup(p);
2712                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2713                         dprintk("%s: bad type %d\n", __func__, *type);
2714                         return -EIO;
2715                 }
2716                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2717                 ret = NFS_ATTR_FATTR_TYPE;
2718         }
2719         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2720         return ret;
2721 out_overflow:
2722         print_overflow_msg(__func__, xdr);
2723         return -EIO;
2724 }
2725
2726 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2727 {
2728         __be32 *p;
2729         int ret = 0;
2730
2731         *change = 0;
2732         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2733                 return -EIO;
2734         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2735                 p = xdr_inline_decode(xdr, 8);
2736                 if (unlikely(!p))
2737                         goto out_overflow;
2738                 xdr_decode_hyper(p, change);
2739                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2740                 ret = NFS_ATTR_FATTR_CHANGE;
2741         }
2742         dprintk("%s: change attribute=%Lu\n", __func__,
2743                         (unsigned long long)*change);
2744         return ret;
2745 out_overflow:
2746         print_overflow_msg(__func__, xdr);
2747         return -EIO;
2748 }
2749
2750 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2751 {
2752         __be32 *p;
2753         int ret = 0;
2754
2755         *size = 0;
2756         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2757                 return -EIO;
2758         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2759                 p = xdr_inline_decode(xdr, 8);
2760                 if (unlikely(!p))
2761                         goto out_overflow;
2762                 xdr_decode_hyper(p, size);
2763                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2764                 ret = NFS_ATTR_FATTR_SIZE;
2765         }
2766         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2767         return ret;
2768 out_overflow:
2769         print_overflow_msg(__func__, xdr);
2770         return -EIO;
2771 }
2772
2773 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2774 {
2775         __be32 *p;
2776
2777         *res = 0;
2778         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2779                 return -EIO;
2780         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2781                 p = xdr_inline_decode(xdr, 4);
2782                 if (unlikely(!p))
2783                         goto out_overflow;
2784                 *res = be32_to_cpup(p);
2785                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2786         }
2787         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2788         return 0;
2789 out_overflow:
2790         print_overflow_msg(__func__, xdr);
2791         return -EIO;
2792 }
2793
2794 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2795 {
2796         __be32 *p;
2797
2798         *res = 0;
2799         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2800                 return -EIO;
2801         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2802                 p = xdr_inline_decode(xdr, 4);
2803                 if (unlikely(!p))
2804                         goto out_overflow;
2805                 *res = be32_to_cpup(p);
2806                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2807         }
2808         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2809         return 0;
2810 out_overflow:
2811         print_overflow_msg(__func__, xdr);
2812         return -EIO;
2813 }
2814
2815 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2816 {
2817         __be32 *p;
2818         int ret = 0;
2819
2820         fsid->major = 0;
2821         fsid->minor = 0;
2822         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2823                 return -EIO;
2824         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2825                 p = xdr_inline_decode(xdr, 16);
2826                 if (unlikely(!p))
2827                         goto out_overflow;
2828                 p = xdr_decode_hyper(p, &fsid->major);
2829                 xdr_decode_hyper(p, &fsid->minor);
2830                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2831                 ret = NFS_ATTR_FATTR_FSID;
2832         }
2833         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2834                         (unsigned long long)fsid->major,
2835                         (unsigned long long)fsid->minor);
2836         return ret;
2837 out_overflow:
2838         print_overflow_msg(__func__, xdr);
2839         return -EIO;
2840 }
2841
2842 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2843 {
2844         __be32 *p;
2845
2846         *res = 60;
2847         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2848                 return -EIO;
2849         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2850                 p = xdr_inline_decode(xdr, 4);
2851                 if (unlikely(!p))
2852                         goto out_overflow;
2853                 *res = be32_to_cpup(p);
2854                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2855         }
2856         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2857         return 0;
2858 out_overflow:
2859         print_overflow_msg(__func__, xdr);
2860         return -EIO;
2861 }
2862
2863 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2864 {
2865         __be32 *p;
2866
2867         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2868                 return -EIO;
2869         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2870                 p = xdr_inline_decode(xdr, 4);
2871                 if (unlikely(!p))
2872                         goto out_overflow;
2873                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2874         }
2875         return 0;
2876 out_overflow:
2877         print_overflow_msg(__func__, xdr);
2878         return -EIO;
2879 }
2880
2881 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2882 {
2883         __be32 *p;
2884         int len;
2885
2886         if (fh != NULL)
2887                 memset(fh, 0, sizeof(*fh));
2888
2889         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2890                 return -EIO;
2891         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2892                 p = xdr_inline_decode(xdr, 4);
2893                 if (unlikely(!p))
2894                         goto out_overflow;
2895                 len = be32_to_cpup(p);
2896                 if (len > NFS4_FHSIZE)
2897                         return -EIO;
2898                 p = xdr_inline_decode(xdr, len);
2899                 if (unlikely(!p))
2900                         goto out_overflow;
2901                 if (fh != NULL) {
2902                         memcpy(fh->data, p, len);
2903                         fh->size = len;
2904                 }
2905                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2906         }
2907         return 0;
2908 out_overflow:
2909         print_overflow_msg(__func__, xdr);
2910         return -EIO;
2911 }
2912
2913 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2914 {
2915         __be32 *p;
2916
2917         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2918         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2919                 return -EIO;
2920         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2921                 p = xdr_inline_decode(xdr, 4);
2922                 if (unlikely(!p))
2923                         goto out_overflow;
2924                 *res = be32_to_cpup(p);
2925                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2926         }
2927         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2928         return 0;
2929 out_overflow:
2930         print_overflow_msg(__func__, xdr);
2931         return -EIO;
2932 }
2933
2934 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2935 {
2936         __be32 *p;
2937         int ret = 0;
2938
2939         *fileid = 0;
2940         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2941                 return -EIO;
2942         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2943                 p = xdr_inline_decode(xdr, 8);
2944                 if (unlikely(!p))
2945                         goto out_overflow;
2946                 xdr_decode_hyper(p, fileid);
2947                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2948                 ret = NFS_ATTR_FATTR_FILEID;
2949         }
2950         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2951         return ret;
2952 out_overflow:
2953         print_overflow_msg(__func__, xdr);
2954         return -EIO;
2955 }
2956
2957 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2958 {
2959         __be32 *p;
2960         int ret = 0;
2961
2962         *fileid = 0;
2963         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2964                 return -EIO;
2965         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2966                 p = xdr_inline_decode(xdr, 8);
2967                 if (unlikely(!p))
2968                         goto out_overflow;
2969                 xdr_decode_hyper(p, fileid);
2970                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2971                 ret = NFS_ATTR_FATTR_FILEID;
2972         }
2973         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2974         return ret;
2975 out_overflow:
2976         print_overflow_msg(__func__, xdr);
2977         return -EIO;
2978 }
2979
2980 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2981 {
2982         __be32 *p;
2983         int status = 0;
2984
2985         *res = 0;
2986         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2987                 return -EIO;
2988         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2989                 p = xdr_inline_decode(xdr, 8);
2990                 if (unlikely(!p))
2991                         goto out_overflow;
2992                 xdr_decode_hyper(p, res);
2993                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2994         }
2995         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2996         return status;
2997 out_overflow:
2998         print_overflow_msg(__func__, xdr);
2999         return -EIO;
3000 }
3001
3002 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3003 {
3004         __be32 *p;
3005         int status = 0;
3006
3007         *res = 0;
3008         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3009                 return -EIO;
3010         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3011                 p = xdr_inline_decode(xdr, 8);
3012                 if (unlikely(!p))
3013                         goto out_overflow;
3014                 xdr_decode_hyper(p, res);
3015                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3016         }
3017         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3018         return status;
3019 out_overflow:
3020         print_overflow_msg(__func__, xdr);
3021         return -EIO;
3022 }
3023
3024 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3025 {
3026         __be32 *p;
3027         int status = 0;
3028
3029         *res = 0;
3030         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3031                 return -EIO;
3032         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3033                 p = xdr_inline_decode(xdr, 8);
3034                 if (unlikely(!p))
3035                         goto out_overflow;
3036                 xdr_decode_hyper(p, res);
3037                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3038         }
3039         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3040         return status;
3041 out_overflow:
3042         print_overflow_msg(__func__, xdr);
3043         return -EIO;
3044 }
3045
3046 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3047 {
3048         u32 n;
3049         __be32 *p;
3050         int status = 0;
3051
3052         p = xdr_inline_decode(xdr, 4);
3053         if (unlikely(!p))
3054                 goto out_overflow;
3055         n = be32_to_cpup(p);
3056         if (n == 0)
3057                 goto root_path;
3058         dprintk("path ");
3059         path->ncomponents = 0;
3060         while (path->ncomponents < n) {
3061                 struct nfs4_string *component = &path->components[path->ncomponents];
3062                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3063                 if (unlikely(status != 0))
3064                         goto out_eio;
3065                 if (path->ncomponents != n)
3066                         dprintk("/");
3067                 dprintk("%s", component->data);
3068                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3069                         path->ncomponents++;
3070                 else {
3071                         dprintk("cannot parse %d components in path\n", n);
3072                         goto out_eio;
3073                 }
3074         }
3075 out:
3076         dprintk("\n");
3077         return status;
3078 root_path:
3079 /* a root pathname is sent as a zero component4 */
3080         path->ncomponents = 1;
3081         path->components[0].len=0;
3082         path->components[0].data=NULL;
3083         dprintk("path /\n");
3084         goto out;
3085 out_eio:
3086         dprintk(" status %d", status);
3087         status = -EIO;
3088         goto out;
3089 out_overflow:
3090         print_overflow_msg(__func__, xdr);
3091         return -EIO;
3092 }
3093
3094 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3095 {
3096         int n;
3097         __be32 *p;
3098         int status = -EIO;
3099
3100         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3101                 goto out;
3102         status = 0;
3103         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3104                 goto out;
3105         dprintk("%s: fsroot ", __func__);
3106         status = decode_pathname(xdr, &res->fs_path);
3107         if (unlikely(status != 0))
3108                 goto out;
3109         p = xdr_inline_decode(xdr, 4);
3110         if (unlikely(!p))
3111                 goto out_overflow;
3112         n = be32_to_cpup(p);
3113         if (n <= 0)
3114                 goto out_eio;
3115         res->nlocations = 0;
3116         while (res->nlocations < n) {
3117                 u32 m;
3118                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3119
3120                 p = xdr_inline_decode(xdr, 4);
3121                 if (unlikely(!p))
3122                         goto out_overflow;
3123                 m = be32_to_cpup(p);
3124
3125                 loc->nservers = 0;
3126                 dprintk("%s: servers ", __func__);
3127                 while (loc->nservers < m) {
3128                         struct nfs4_string *server = &loc->servers[loc->nservers];
3129                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3130                         if (unlikely(status != 0))
3131                                 goto out_eio;
3132                         dprintk("%s ", server->data);
3133                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3134                                 loc->nservers++;
3135                         else {
3136                                 unsigned int i;
3137                                 dprintk("%s: using first %u of %u servers "
3138                                         "returned for location %u\n",
3139                                                 __func__,
3140                                                 NFS4_FS_LOCATION_MAXSERVERS,
3141                                                 m, res->nlocations);
3142                                 for (i = loc->nservers; i < m; i++) {
3143                                         unsigned int len;
3144                                         char *data;
3145                                         status = decode_opaque_inline(xdr, &len, &data);
3146                                         if (unlikely(status != 0))
3147                                                 goto out_eio;
3148                                 }
3149                         }
3150                 }
3151                 status = decode_pathname(xdr, &loc->rootpath);
3152                 if (unlikely(status != 0))
3153                         goto out_eio;
3154                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3155                         res->nlocations++;
3156         }
3157         if (res->nlocations != 0)
3158                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3159 out:
3160         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3161         return status;
3162 out_overflow:
3163         print_overflow_msg(__func__, xdr);
3164 out_eio:
3165         status = -EIO;
3166         goto out;
3167 }
3168
3169 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3170 {
3171         __be32 *p;
3172         int status = 0;
3173
3174         *res = 0;
3175         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3176                 return -EIO;
3177         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3178                 p = xdr_inline_decode(xdr, 8);
3179                 if (unlikely(!p))
3180                         goto out_overflow;
3181                 xdr_decode_hyper(p, res);
3182                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3183         }
3184         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3185         return status;
3186 out_overflow:
3187         print_overflow_msg(__func__, xdr);
3188         return -EIO;
3189 }
3190
3191 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3192 {
3193         __be32 *p;
3194         int status = 0;
3195
3196         *maxlink = 1;
3197         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3198                 return -EIO;
3199         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3200                 p = xdr_inline_decode(xdr, 4);
3201                 if (unlikely(!p))
3202                         goto out_overflow;
3203                 *maxlink = be32_to_cpup(p);
3204                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3205         }
3206         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3207         return status;
3208 out_overflow:
3209         print_overflow_msg(__func__, xdr);
3210         return -EIO;
3211 }
3212
3213 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3214 {
3215         __be32 *p;
3216         int status = 0;
3217
3218         *maxname = 1024;
3219         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3220                 return -EIO;
3221         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3222                 p = xdr_inline_decode(xdr, 4);
3223                 if (unlikely(!p))
3224                         goto out_overflow;
3225                 *maxname = be32_to_cpup(p);
3226                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3227         }
3228         dprintk("%s: maxname=%u\n", __func__, *maxname);
3229         return status;
3230 out_overflow:
3231         print_overflow_msg(__func__, xdr);
3232         return -EIO;
3233 }
3234
3235 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3236 {
3237         __be32 *p;
3238         int status = 0;
3239
3240         *res = 1024;
3241         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3242                 return -EIO;
3243         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3244                 uint64_t maxread;
3245                 p = xdr_inline_decode(xdr, 8);
3246                 if (unlikely(!p))
3247                         goto out_overflow;
3248                 xdr_decode_hyper(p, &maxread);
3249                 if (maxread > 0x7FFFFFFF)
3250                         maxread = 0x7FFFFFFF;
3251                 *res = (uint32_t)maxread;
3252                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3253         }
3254         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3255         return status;
3256 out_overflow:
3257         print_overflow_msg(__func__, xdr);
3258         return -EIO;
3259 }
3260
3261 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3262 {
3263         __be32 *p;
3264         int status = 0;
3265
3266         *res = 1024;
3267         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3268                 return -EIO;
3269         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3270                 uint64_t maxwrite;
3271                 p = xdr_inline_decode(xdr, 8);
3272                 if (unlikely(!p))
3273                         goto out_overflow;
3274                 xdr_decode_hyper(p, &maxwrite);
3275                 if (maxwrite > 0x7FFFFFFF)
3276                         maxwrite = 0x7FFFFFFF;
3277                 *res = (uint32_t)maxwrite;
3278                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3279         }
3280         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3281         return status;
3282 out_overflow:
3283         print_overflow_msg(__func__, xdr);
3284         return -EIO;
3285 }
3286
3287 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3288 {
3289         uint32_t tmp;
3290         __be32 *p;
3291         int ret = 0;
3292
3293         *mode = 0;
3294         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3295                 return -EIO;
3296         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3297                 p = xdr_inline_decode(xdr, 4);
3298                 if (unlikely(!p))
3299                         goto out_overflow;
3300                 tmp = be32_to_cpup(p);
3301                 *mode = tmp & ~S_IFMT;
3302                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3303                 ret = NFS_ATTR_FATTR_MODE;
3304         }
3305         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3306         return ret;
3307 out_overflow:
3308         print_overflow_msg(__func__, xdr);
3309         return -EIO;
3310 }
3311
3312 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3313 {
3314         __be32 *p;
3315         int ret = 0;
3316
3317         *nlink = 1;
3318         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3319                 return -EIO;
3320         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3321                 p = xdr_inline_decode(xdr, 4);
3322                 if (unlikely(!p))
3323                         goto out_overflow;
3324                 *nlink = be32_to_cpup(p);
3325                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3326                 ret = NFS_ATTR_FATTR_NLINK;
3327         }
3328         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3329         return ret;
3330 out_overflow:
3331         print_overflow_msg(__func__, xdr);
3332         return -EIO;
3333 }
3334
3335 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3336                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3337 {
3338         uint32_t len;
3339         __be32 *p;
3340         int ret = 0;
3341
3342         *uid = -2;
3343         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3344                 return -EIO;
3345         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3346                 p = xdr_inline_decode(xdr, 4);
3347                 if (unlikely(!p))
3348                         goto out_overflow;
3349                 len = be32_to_cpup(p);
3350                 p = xdr_inline_decode(xdr, len);
3351                 if (unlikely(!p))
3352                         goto out_overflow;
3353                 if (!may_sleep) {
3354                         /* do nothing */
3355                 } else if (len < XDR_MAX_NETOBJ) {
3356                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3357                                 ret = NFS_ATTR_FATTR_OWNER;
3358                         else
3359                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3360                                                 __func__);
3361                 } else
3362                         dprintk("%s: name too long (%u)!\n",
3363                                         __func__, len);
3364                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3365         }
3366         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3367         return ret;
3368 out_overflow:
3369         print_overflow_msg(__func__, xdr);
3370         return -EIO;
3371 }
3372
3373 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3374                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3375 {
3376         uint32_t len;
3377         __be32 *p;
3378         int ret = 0;
3379
3380         *gid = -2;
3381         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3382                 return -EIO;
3383         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3384                 p = xdr_inline_decode(xdr, 4);
3385                 if (unlikely(!p))
3386                         goto out_overflow;
3387                 len = be32_to_cpup(p);
3388                 p = xdr_inline_decode(xdr, len);
3389                 if (unlikely(!p))
3390                         goto out_overflow;
3391                 if (!may_sleep) {
3392                         /* do nothing */
3393                 } else if (len < XDR_MAX_NETOBJ) {
3394                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3395                                 ret = NFS_ATTR_FATTR_GROUP;
3396                         else
3397                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3398                                                 __func__);
3399                 } else
3400                         dprintk("%s: name too long (%u)!\n",
3401                                         __func__, len);
3402                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3403         }
3404         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3405         return ret;
3406 out_overflow:
3407         print_overflow_msg(__func__, xdr);
3408         return -EIO;
3409 }
3410
3411 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3412 {
3413         uint32_t major = 0, minor = 0;
3414         __be32 *p;
3415         int ret = 0;
3416
3417         *rdev = MKDEV(0,0);
3418         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3419                 return -EIO;
3420         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3421                 dev_t tmp;
3422
3423                 p = xdr_inline_decode(xdr, 8);
3424                 if (unlikely(!p))
3425                         goto out_overflow;
3426                 major = be32_to_cpup(p++);
3427                 minor = be32_to_cpup(p);
3428                 tmp = MKDEV(major, minor);
3429                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3430                         *rdev = tmp;
3431                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3432                 ret = NFS_ATTR_FATTR_RDEV;
3433         }
3434         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3435         return ret;
3436 out_overflow:
3437         print_overflow_msg(__func__, xdr);
3438         return -EIO;
3439 }
3440
3441 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3442 {
3443         __be32 *p;
3444         int status = 0;
3445
3446         *res = 0;
3447         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3448                 return -EIO;
3449         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3450                 p = xdr_inline_decode(xdr, 8);
3451                 if (unlikely(!p))
3452                         goto out_overflow;
3453                 xdr_decode_hyper(p, res);
3454                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3455         }
3456         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3457         return status;
3458 out_overflow:
3459         print_overflow_msg(__func__, xdr);
3460         return -EIO;
3461 }
3462
3463 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3464 {
3465         __be32 *p;
3466         int status = 0;
3467
3468         *res = 0;
3469         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3472                 p = xdr_inline_decode(xdr, 8);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 xdr_decode_hyper(p, res);
3476                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3477         }
3478         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3479         return status;
3480 out_overflow:
3481         print_overflow_msg(__func__, xdr);
3482         return -EIO;
3483 }
3484
3485 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3486 {
3487         __be32 *p;
3488         int status = 0;
3489
3490         *res = 0;
3491         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3492                 return -EIO;
3493         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3494                 p = xdr_inline_decode(xdr, 8);
3495                 if (unlikely(!p))
3496                         goto out_overflow;
3497                 xdr_decode_hyper(p, res);
3498                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3499         }
3500         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3501         return status;
3502 out_overflow:
3503         print_overflow_msg(__func__, xdr);
3504         return -EIO;
3505 }
3506
3507 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3508 {
3509         __be32 *p;
3510         int ret = 0;
3511
3512         *used = 0;
3513         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3514                 return -EIO;
3515         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3516                 p = xdr_inline_decode(xdr, 8);
3517                 if (unlikely(!p))
3518                         goto out_overflow;
3519                 xdr_decode_hyper(p, used);
3520                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3521                 ret = NFS_ATTR_FATTR_SPACE_USED;
3522         }
3523         dprintk("%s: space used=%Lu\n", __func__,
3524                         (unsigned long long)*used);
3525         return ret;
3526 out_overflow:
3527         print_overflow_msg(__func__, xdr);
3528         return -EIO;
3529 }
3530
3531 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3532 {
3533         __be32 *p;
3534         uint64_t sec;
3535         uint32_t nsec;
3536
3537         p = xdr_inline_decode(xdr, 12);
3538         if (unlikely(!p))
3539                 goto out_overflow;
3540         p = xdr_decode_hyper(p, &sec);
3541         nsec = be32_to_cpup(p);
3542         time->tv_sec = (time_t)sec;
3543         time->tv_nsec = (long)nsec;
3544         return 0;
3545 out_overflow:
3546         print_overflow_msg(__func__, xdr);
3547         return -EIO;
3548 }
3549
3550 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3551 {
3552         int status = 0;
3553
3554         time->tv_sec = 0;
3555         time->tv_nsec = 0;
3556         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3557                 return -EIO;
3558         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3559                 status = decode_attr_time(xdr, time);
3560                 if (status == 0)
3561                         status = NFS_ATTR_FATTR_ATIME;
3562                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3563         }
3564         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3565         return status;
3566 }
3567
3568 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3569 {
3570         int status = 0;
3571
3572         time->tv_sec = 0;
3573         time->tv_nsec = 0;
3574         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3575                 return -EIO;
3576         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3577                 status = decode_attr_time(xdr, time);
3578                 if (status == 0)
3579                         status = NFS_ATTR_FATTR_CTIME;
3580                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3581         }
3582         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3583         return status;
3584 }
3585
3586 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3587 {
3588         int status = 0;
3589
3590         time->tv_sec = 0;
3591         time->tv_nsec = 0;
3592         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3593                 return -EIO;
3594         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3595                 status = decode_attr_time(xdr, time);
3596                 if (status == 0)
3597                         status = NFS_ATTR_FATTR_MTIME;
3598                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3599         }
3600         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3601         return status;
3602 }
3603
3604 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3605 {
3606         unsigned int attrwords = XDR_QUADLEN(attrlen);
3607         unsigned int nwords = xdr->p - savep;
3608
3609         if (unlikely(attrwords != nwords)) {
3610                 dprintk("%s: server returned incorrect attribute length: "
3611                         "%u %c %u\n",
3612                                 __func__,
3613                                 attrwords << 2,
3614                                 (attrwords < nwords) ? '<' : '>',
3615                                 nwords << 2);
3616                 return -EIO;
3617         }
3618         return 0;
3619 }
3620
3621 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3622 {
3623         __be32 *p;
3624
3625         p = xdr_inline_decode(xdr, 20);
3626         if (unlikely(!p))
3627                 goto out_overflow;
3628         cinfo->atomic = be32_to_cpup(p++);
3629         p = xdr_decode_hyper(p, &cinfo->before);
3630         xdr_decode_hyper(p, &cinfo->after);
3631         return 0;
3632 out_overflow:
3633         print_overflow_msg(__func__, xdr);
3634         return -EIO;
3635 }
3636
3637 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3638 {
3639         __be32 *p;
3640         uint32_t supp, acc;
3641         int status;
3642
3643         status = decode_op_hdr(xdr, OP_ACCESS);
3644         if (status)
3645                 return status;
3646         p = xdr_inline_decode(xdr, 8);
3647         if (unlikely(!p))
3648                 goto out_overflow;
3649         supp = be32_to_cpup(p++);
3650         acc = be32_to_cpup(p);
3651         access->supported = supp;
3652         access->access = acc;
3653         return 0;
3654 out_overflow:
3655         print_overflow_msg(__func__, xdr);
3656         return -EIO;
3657 }
3658
3659 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3660 {
3661         __be32 *p;
3662
3663         p = xdr_inline_decode(xdr, len);
3664         if (likely(p)) {
3665                 memcpy(buf, p, len);
3666                 return 0;
3667         }
3668         print_overflow_msg(__func__, xdr);
3669         return -EIO;
3670 }
3671
3672 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3673 {
3674         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3675 }
3676
3677 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3678 {
3679         int status;
3680
3681         status = decode_op_hdr(xdr, OP_CLOSE);
3682         if (status != -EIO)
3683                 nfs_increment_open_seqid(status, res->seqid);
3684         if (!status)
3685                 status = decode_stateid(xdr, &res->stateid);
3686         return status;
3687 }
3688
3689 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3690 {
3691         return decode_opaque_fixed(xdr, verifier, 8);
3692 }
3693
3694 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3695 {
3696         int status;
3697
3698         status = decode_op_hdr(xdr, OP_COMMIT);
3699         if (!status)
3700                 status = decode_verifier(xdr, res->verf->verifier);
3701         return status;
3702 }
3703
3704 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3705 {
3706         __be32 *p;
3707         uint32_t bmlen;
3708         int status;
3709
3710         status = decode_op_hdr(xdr, OP_CREATE);
3711         if (status)
3712                 return status;
3713         if ((status = decode_change_info(xdr, cinfo)))
3714                 return status;
3715         p = xdr_inline_decode(xdr, 4);
3716         if (unlikely(!p))
3717                 goto out_overflow;
3718         bmlen = be32_to_cpup(p);
3719         p = xdr_inline_decode(xdr, bmlen << 2);
3720         if (likely(p))
3721                 return 0;
3722 out_overflow:
3723         print_overflow_msg(__func__, xdr);
3724         return -EIO;
3725 }
3726
3727 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3728 {
3729         __be32 *savep;
3730         uint32_t attrlen, bitmap[2] = {0};
3731         int status;
3732
3733         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3734                 goto xdr_error;
3735         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3736                 goto xdr_error;
3737         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3738                 goto xdr_error;
3739         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3740                 goto xdr_error;
3741         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3742                 goto xdr_error;
3743         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3744                 goto xdr_error;
3745         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3746                 goto xdr_error;
3747         status = verify_attr_len(xdr, savep, attrlen);
3748 xdr_error:
3749         dprintk("%s: xdr returned %d!\n", __func__, -status);
3750         return status;
3751 }
3752
3753 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3754 {
3755         __be32 *savep;
3756         uint32_t attrlen, bitmap[2] = {0};
3757         int status;
3758
3759         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3760                 goto xdr_error;
3761         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3762                 goto xdr_error;
3763         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3764                 goto xdr_error;
3765
3766         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3767                 goto xdr_error;
3768         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3769                 goto xdr_error;
3770         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3771                 goto xdr_error;
3772         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3773                 goto xdr_error;
3774         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3775                 goto xdr_error;
3776         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3777                 goto xdr_error;
3778
3779         status = verify_attr_len(xdr, savep, attrlen);
3780 xdr_error:
3781         dprintk("%s: xdr returned %d!\n", __func__, -status);
3782         return status;
3783 }
3784
3785 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3786 {
3787         __be32 *savep;
3788         uint32_t attrlen, bitmap[2] = {0};
3789         int status;
3790
3791         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3792                 goto xdr_error;
3793         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3794                 goto xdr_error;
3795         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3796                 goto xdr_error;
3797
3798         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3799                 goto xdr_error;
3800         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3801                 goto xdr_error;
3802
3803         status = verify_attr_len(xdr, savep, attrlen);
3804 xdr_error:
3805         dprintk("%s: xdr returned %d!\n", __func__, -status);
3806         return status;
3807 }
3808
3809 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3810                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3811                 const struct nfs_server *server, int may_sleep)
3812 {
3813         int status;
3814         umode_t fmode = 0;
3815         uint64_t fileid;
3816         uint32_t type;
3817
3818         status = decode_attr_type(xdr, bitmap, &type);
3819         if (status < 0)
3820                 goto xdr_error;
3821         fattr->mode = 0;
3822         if (status != 0) {
3823                 fattr->mode |= nfs_type2fmt[type];
3824                 fattr->valid |= status;
3825         }
3826
3827         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3828         if (status < 0)
3829                 goto xdr_error;
3830         fattr->valid |= status;
3831
3832         status = decode_attr_size(xdr, bitmap, &fattr->size);
3833         if (status < 0)
3834                 goto xdr_error;
3835         fattr->valid |= status;
3836
3837         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3838         if (status < 0)
3839                 goto xdr_error;
3840         fattr->valid |= status;
3841
3842         status = decode_attr_error(xdr, bitmap);
3843         if (status < 0)
3844                 goto xdr_error;
3845
3846         status = decode_attr_filehandle(xdr, bitmap, fh);
3847         if (status < 0)
3848                 goto xdr_error;
3849
3850         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3851         if (status < 0)
3852                 goto xdr_error;
3853         fattr->valid |= status;
3854
3855         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3856                                                 struct nfs4_fs_locations,
3857                                                 fattr));
3858         if (status < 0)
3859                 goto xdr_error;
3860         fattr->valid |= status;
3861
3862         status = decode_attr_mode(xdr, bitmap, &fmode);
3863         if (status < 0)
3864                 goto xdr_error;
3865         if (status != 0) {
3866                 fattr->mode |= fmode;
3867                 fattr->valid |= status;
3868         }
3869
3870         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3871         if (status < 0)
3872                 goto xdr_error;
3873         fattr->valid |= status;
3874
3875         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3876                         &fattr->uid, may_sleep);
3877         if (status < 0)
3878                 goto xdr_error;
3879         fattr->valid |= status;
3880
3881         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3882                         &fattr->gid, may_sleep);
3883         if (status < 0)
3884                 goto xdr_error;
3885         fattr->valid |= status;
3886
3887         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3888         if (status < 0)
3889                 goto xdr_error;
3890         fattr->valid |= status;
3891
3892         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3893         if (status < 0)
3894                 goto xdr_error;
3895         fattr->valid |= status;
3896
3897         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3898         if (status < 0)
3899                 goto xdr_error;
3900         fattr->valid |= status;
3901
3902         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3903         if (status < 0)
3904                 goto xdr_error;
3905         fattr->valid |= status;
3906
3907         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3908         if (status < 0)
3909                 goto xdr_error;
3910         fattr->valid |= status;
3911
3912         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3913         if (status < 0)
3914                 goto xdr_error;
3915         if (status != 0) {
3916                 fattr->fileid = fileid;
3917                 fattr->valid |= status;
3918         }
3919
3920 xdr_error:
3921         dprintk("%s: xdr returned %d\n", __func__, -status);
3922         return status;
3923 }
3924
3925 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3926                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3927 {
3928         __be32 *savep;
3929         uint32_t attrlen,
3930                  bitmap[2] = {0};
3931         int status;
3932
3933         status = decode_op_hdr(xdr, OP_GETATTR);
3934         if (status < 0)
3935                 goto xdr_error;
3936
3937         status = decode_attr_bitmap(xdr, bitmap);
3938         if (status < 0)
3939                 goto xdr_error;
3940
3941         status = decode_attr_length(xdr, &attrlen, &savep);
3942         if (status < 0)
3943                 goto xdr_error;
3944
3945         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
3946         if (status < 0)
3947                 goto xdr_error;
3948
3949         status = verify_attr_len(xdr, savep, attrlen);
3950 xdr_error:
3951         dprintk("%s: xdr returned %d\n", __func__, -status);
3952         return status;
3953 }
3954
3955 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3956                 const struct nfs_server *server, int may_sleep)
3957 {
3958         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
3959 }
3960
3961 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3962 {
3963         __be32 *savep;
3964         uint32_t attrlen, bitmap[2];
3965         int status;
3966
3967         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3968                 goto xdr_error;
3969         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3970                 goto xdr_error;
3971         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3972                 goto xdr_error;
3973
3974         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3975
3976         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3977                 goto xdr_error;
3978         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3979                 goto xdr_error;
3980         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3981                 goto xdr_error;
3982         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3983         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3984                 goto xdr_error;
3985         fsinfo->wtpref = fsinfo->wtmax;
3986
3987         status = verify_attr_len(xdr, savep, attrlen);
3988 xdr_error:
3989         dprintk("%s: xdr returned %d!\n", __func__, -status);
3990         return status;
3991 }
3992
3993 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3994 {
3995         __be32 *p;
3996         uint32_t len;
3997         int status;
3998
3999         /* Zero handle first to allow comparisons */
4000         memset(fh, 0, sizeof(*fh));
4001
4002         status = decode_op_hdr(xdr, OP_GETFH);
4003         if (status)
4004                 return status;
4005
4006         p = xdr_inline_decode(xdr, 4);
4007         if (unlikely(!p))
4008                 goto out_overflow;
4009         len = be32_to_cpup(p);
4010         if (len > NFS4_FHSIZE)
4011                 return -EIO;
4012         fh->size = len;
4013         p = xdr_inline_decode(xdr, len);
4014         if (unlikely(!p))
4015                 goto out_overflow;
4016         memcpy(fh->data, p, len);
4017         return 0;
4018 out_overflow:
4019         print_overflow_msg(__func__, xdr);
4020         return -EIO;
4021 }
4022
4023 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4024 {
4025         int status;
4026
4027         status = decode_op_hdr(xdr, OP_LINK);
4028         if (status)
4029                 return status;
4030         return decode_change_info(xdr, cinfo);
4031 }
4032
4033 /*
4034  * We create the owner, so we know a proper owner.id length is 4.
4035  */
4036 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4037 {
4038         uint64_t offset, length, clientid;
4039         __be32 *p;
4040         uint32_t namelen, type;
4041
4042         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4043         if (unlikely(!p))
4044                 goto out_overflow;
4045         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4046         p = xdr_decode_hyper(p, &length);
4047         type = be32_to_cpup(p++); /* 4 byte read */
4048         if (fl != NULL) { /* manipulate file lock */
4049                 fl->fl_start = (loff_t)offset;
4050                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4051                 if (length == ~(uint64_t)0)
4052                         fl->fl_end = OFFSET_MAX;
4053                 fl->fl_type = F_WRLCK;
4054                 if (type & 1)
4055                         fl->fl_type = F_RDLCK;
4056                 fl->fl_pid = 0;
4057         }
4058         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4059         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4060         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4061         if (likely(p))
4062                 return -NFS4ERR_DENIED;
4063 out_overflow:
4064         print_overflow_msg(__func__, xdr);
4065         return -EIO;
4066 }
4067
4068 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4069 {
4070         int status;
4071
4072         status = decode_op_hdr(xdr, OP_LOCK);
4073         if (status == -EIO)
4074                 goto out;
4075         if (status == 0) {
4076                 status = decode_stateid(xdr, &res->stateid);
4077                 if (unlikely(status))
4078                         goto out;
4079         } else if (status == -NFS4ERR_DENIED)
4080                 status = decode_lock_denied(xdr, NULL);
4081         if (res->open_seqid != NULL)
4082                 nfs_increment_open_seqid(status, res->open_seqid);
4083         nfs_increment_lock_seqid(status, res->lock_seqid);
4084 out:
4085         return status;
4086 }
4087
4088 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4089 {
4090         int status;
4091         status = decode_op_hdr(xdr, OP_LOCKT);
4092         if (status == -NFS4ERR_DENIED)
4093                 return decode_lock_denied(xdr, res->denied);
4094         return status;
4095 }
4096
4097 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4098 {
4099         int status;
4100
4101         status = decode_op_hdr(xdr, OP_LOCKU);
4102         if (status != -EIO)
4103                 nfs_increment_lock_seqid(status, res->seqid);
4104         if (status == 0)
4105                 status = decode_stateid(xdr, &res->stateid);
4106         return status;
4107 }
4108
4109 static int decode_release_lockowner(struct xdr_stream *xdr)
4110 {
4111         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4112 }
4113
4114 static int decode_lookup(struct xdr_stream *xdr)
4115 {
4116         return decode_op_hdr(xdr, OP_LOOKUP);
4117 }
4118
4119 /* This is too sick! */
4120 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4121 {
4122         __be32 *p;
4123         uint32_t limit_type, nblocks, blocksize;
4124
4125         p = xdr_inline_decode(xdr, 12);
4126         if (unlikely(!p))
4127                 goto out_overflow;
4128         limit_type = be32_to_cpup(p++);
4129         switch (limit_type) {
4130         case 1:
4131                 xdr_decode_hyper(p, maxsize);
4132                 break;
4133         case 2:
4134                 nblocks = be32_to_cpup(p++);
4135                 blocksize = be32_to_cpup(p);
4136                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4137         }
4138         return 0;
4139 out_overflow:
4140         print_overflow_msg(__func__, xdr);
4141         return -EIO;
4142 }
4143
4144 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4145 {
4146         __be32 *p;
4147         uint32_t delegation_type;
4148         int status;
4149
4150         p = xdr_inline_decode(xdr, 4);
4151         if (unlikely(!p))
4152                 goto out_overflow;
4153         delegation_type = be32_to_cpup(p);
4154         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4155                 res->delegation_type = 0;
4156                 return 0;
4157         }
4158         status = decode_stateid(xdr, &res->delegation);
4159         if (unlikely(status))
4160                 return status;
4161         p = xdr_inline_decode(xdr, 4);
4162         if (unlikely(!p))
4163                 goto out_overflow;
4164         res->do_recall = be32_to_cpup(p);
4165
4166         switch (delegation_type) {
4167         case NFS4_OPEN_DELEGATE_READ:
4168                 res->delegation_type = FMODE_READ;
4169                 break;
4170         case NFS4_OPEN_DELEGATE_WRITE:
4171                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4172                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4173                                 return -EIO;
4174         }
4175         return decode_ace(xdr, NULL, res->server->nfs_client);
4176 out_overflow:
4177         print_overflow_msg(__func__, xdr);
4178         return -EIO;
4179 }
4180
4181 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4182 {
4183         __be32 *p;
4184         uint32_t savewords, bmlen, i;
4185         int status;
4186
4187         status = decode_op_hdr(xdr, OP_OPEN);
4188         if (status != -EIO)
4189                 nfs_increment_open_seqid(status, res->seqid);
4190         if (!status)
4191                 status = decode_stateid(xdr, &res->stateid);
4192         if (unlikely(status))
4193                 return status;
4194
4195         decode_change_info(xdr, &res->cinfo);
4196
4197         p = xdr_inline_decode(xdr, 8);
4198         if (unlikely(!p))
4199                 goto out_overflow;
4200         res->rflags = be32_to_cpup(p++);
4201         bmlen = be32_to_cpup(p);
4202         if (bmlen > 10)
4203                 goto xdr_error;
4204
4205         p = xdr_inline_decode(xdr, bmlen << 2);
4206         if (unlikely(!p))
4207                 goto out_overflow;
4208         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4209         for (i = 0; i < savewords; ++i)
4210                 res->attrset[i] = be32_to_cpup(p++);
4211         for (; i < NFS4_BITMAP_SIZE; i++)
4212                 res->attrset[i] = 0;
4213
4214         return decode_delegation(xdr, res);
4215 xdr_error:
4216         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4217         return -EIO;
4218 out_overflow:
4219         print_overflow_msg(__func__, xdr);
4220         return -EIO;
4221 }
4222
4223 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4224 {
4225         int status;
4226
4227         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4228         if (status != -EIO)
4229                 nfs_increment_open_seqid(status, res->seqid);
4230         if (!status)
4231                 status = decode_stateid(xdr, &res->stateid);
4232         return status;
4233 }
4234
4235 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4236 {
4237         int status;
4238
4239         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4240         if (status != -EIO)
4241                 nfs_increment_open_seqid(status, res->seqid);
4242         if (!status)
4243                 status = decode_stateid(xdr, &res->stateid);
4244         return status;
4245 }
4246
4247 static int decode_putfh(struct xdr_stream *xdr)
4248 {
4249         return decode_op_hdr(xdr, OP_PUTFH);
4250 }
4251
4252 static int decode_putrootfh(struct xdr_stream *xdr)
4253 {
4254         return decode_op_hdr(xdr, OP_PUTROOTFH);
4255 }
4256
4257 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4258 {
4259         struct kvec *iov = req->rq_rcv_buf.head;
4260         __be32 *p;
4261         uint32_t count, eof, recvd, hdrlen;
4262         int status;
4263
4264         status = decode_op_hdr(xdr, OP_READ);
4265         if (status)
4266                 return status;
4267         p = xdr_inline_decode(xdr, 8);
4268         if (unlikely(!p))
4269                 goto out_overflow;
4270         eof = be32_to_cpup(p++);
4271         count = be32_to_cpup(p);
4272         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4273         recvd = req->rq_rcv_buf.len - hdrlen;
4274         if (count > recvd) {
4275                 dprintk("NFS: server cheating in read reply: "
4276                                 "count %u > recvd %u\n", count, recvd);
4277                 count = recvd;
4278                 eof = 0;
4279         }
4280         xdr_read_pages(xdr, count);
4281         res->eof = eof;
4282         res->count = count;
4283         return 0;
4284 out_overflow:
4285         print_overflow_msg(__func__, xdr);
4286         return -EIO;
4287 }
4288
4289 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4290 {
4291         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4292         struct kvec     *iov = rcvbuf->head;
4293         size_t          hdrlen;
4294         u32             recvd, pglen = rcvbuf->page_len;
4295         int             status;
4296
4297         status = decode_op_hdr(xdr, OP_READDIR);
4298         if (!status)
4299                 status = decode_verifier(xdr, readdir->verifier.data);
4300         if (unlikely(status))
4301                 return status;
4302         dprintk("%s: verifier = %08x:%08x\n",
4303                         __func__,
4304                         ((u32 *)readdir->verifier.data)[0],
4305                         ((u32 *)readdir->verifier.data)[1]);
4306
4307
4308         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4309         recvd = rcvbuf->len - hdrlen;
4310         if (pglen > recvd)
4311                 pglen = recvd;
4312         xdr_read_pages(xdr, pglen);
4313
4314
4315         return 0;
4316 }
4317
4318 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4319 {
4320         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4321         struct kvec *iov = rcvbuf->head;
4322         size_t hdrlen;
4323         u32 len, recvd;
4324         __be32 *p;
4325         int status;
4326
4327         status = decode_op_hdr(xdr, OP_READLINK);
4328         if (status)
4329                 return status;
4330
4331         /* Convert length of symlink */
4332         p = xdr_inline_decode(xdr, 4);
4333         if (unlikely(!p))
4334                 goto out_overflow;
4335         len = be32_to_cpup(p);
4336         if (len >= rcvbuf->page_len || len <= 0) {
4337                 dprintk("nfs: server returned giant symlink!\n");
4338                 return -ENAMETOOLONG;
4339         }
4340         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4341         recvd = req->rq_rcv_buf.len - hdrlen;
4342         if (recvd < len) {
4343                 dprintk("NFS: server cheating in readlink reply: "
4344                                 "count %u > recvd %u\n", len, recvd);
4345                 return -EIO;
4346         }
4347         xdr_read_pages(xdr, len);
4348         /*
4349          * The XDR encode routine has set things up so that
4350          * the link text will be copied directly into the
4351          * buffer.  We just have to do overflow-checking,
4352          * and and null-terminate the text (the VFS expects
4353          * null-termination).
4354          */
4355         xdr_terminate_string(rcvbuf, len);
4356         return 0;
4357 out_overflow:
4358         print_overflow_msg(__func__, xdr);
4359         return -EIO;
4360 }
4361
4362 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4363 {
4364         int status;
4365
4366         status = decode_op_hdr(xdr, OP_REMOVE);
4367         if (status)
4368                 goto out;
4369         status = decode_change_info(xdr, cinfo);
4370 out:
4371         return status;
4372 }
4373
4374 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4375               struct nfs4_change_info *new_cinfo)
4376 {
4377         int status;
4378
4379         status = decode_op_hdr(xdr, OP_RENAME);
4380         if (status)
4381                 goto out;
4382         if ((status = decode_change_info(xdr, old_cinfo)))
4383                 goto out;
4384         status = decode_change_info(xdr, new_cinfo);
4385 out:
4386         return status;
4387 }
4388
4389 static int decode_renew(struct xdr_stream *xdr)
4390 {
4391         return decode_op_hdr(xdr, OP_RENEW);
4392 }
4393
4394 static int
4395 decode_restorefh(struct xdr_stream *xdr)
4396 {
4397         return decode_op_hdr(xdr, OP_RESTOREFH);
4398 }
4399
4400 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4401                 size_t *acl_len)
4402 {
4403         __be32 *savep;
4404         uint32_t attrlen,
4405                  bitmap[2] = {0};
4406         struct kvec *iov = req->rq_rcv_buf.head;
4407         int status;
4408
4409         *acl_len = 0;
4410         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4411                 goto out;
4412         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4413                 goto out;
4414         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4415                 goto out;
4416
4417         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4418                 return -EIO;
4419         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4420                 size_t hdrlen;
4421                 u32 recvd;
4422
4423                 /* We ignore &savep and don't do consistency checks on
4424                  * the attr length.  Let userspace figure it out.... */
4425                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4426                 recvd = req->rq_rcv_buf.len - hdrlen;
4427                 if (attrlen > recvd) {
4428                         dprintk("NFS: server cheating in getattr"
4429                                         " acl reply: attrlen %u > recvd %u\n",
4430                                         attrlen, recvd);
4431                         return -EINVAL;
4432                 }
4433                 xdr_read_pages(xdr, attrlen);
4434                 *acl_len = attrlen;
4435         } else
4436                 status = -EOPNOTSUPP;
4437
4438 out:
4439         return status;
4440 }
4441
4442 static int
4443 decode_savefh(struct xdr_stream *xdr)
4444 {
4445         return decode_op_hdr(xdr, OP_SAVEFH);
4446 }
4447
4448 static int decode_setattr(struct xdr_stream *xdr)
4449 {
4450         __be32 *p;
4451         uint32_t bmlen;
4452         int status;
4453
4454         status = decode_op_hdr(xdr, OP_SETATTR);
4455         if (status)
4456                 return status;
4457         p = xdr_inline_decode(xdr, 4);
4458         if (unlikely(!p))
4459                 goto out_overflow;
4460         bmlen = be32_to_cpup(p);
4461         p = xdr_inline_decode(xdr, bmlen << 2);
4462         if (likely(p))
4463                 return 0;
4464 out_overflow:
4465         print_overflow_msg(__func__, xdr);
4466         return -EIO;
4467 }
4468
4469 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4470 {
4471         __be32 *p;
4472         uint32_t opnum;
4473         int32_t nfserr;
4474
4475         p = xdr_inline_decode(xdr, 8);
4476         if (unlikely(!p))
4477                 goto out_overflow;
4478         opnum = be32_to_cpup(p++);
4479         if (opnum != OP_SETCLIENTID) {
4480                 dprintk("nfs: decode_setclientid: Server returned operation"
4481                         " %d\n", opnum);
4482                 return -EIO;
4483         }
4484         nfserr = be32_to_cpup(p);
4485         if (nfserr == NFS_OK) {
4486                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4487                 if (unlikely(!p))
4488                         goto out_overflow;
4489                 p = xdr_decode_hyper(p, &res->clientid);
4490                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4491         } else if (nfserr == NFSERR_CLID_INUSE) {
4492                 uint32_t len;
4493
4494                 /* skip netid string */
4495                 p = xdr_inline_decode(xdr, 4);
4496                 if (unlikely(!p))
4497                         goto out_overflow;
4498                 len = be32_to_cpup(p);
4499                 p = xdr_inline_decode(xdr, len);
4500                 if (unlikely(!p))
4501                         goto out_overflow;
4502
4503                 /* skip uaddr string */
4504                 p = xdr_inline_decode(xdr, 4);
4505                 if (unlikely(!p))
4506                         goto out_overflow;
4507                 len = be32_to_cpup(p);
4508                 p = xdr_inline_decode(xdr, len);
4509                 if (unlikely(!p))
4510                         goto out_overflow;
4511                 return -NFSERR_CLID_INUSE;
4512         } else
4513                 return nfs4_stat_to_errno(nfserr);
4514
4515         return 0;
4516 out_overflow:
4517         print_overflow_msg(__func__, xdr);
4518         return -EIO;
4519 }
4520
4521 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4522 {
4523         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4524 }
4525
4526 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4527 {
4528         __be32 *p;
4529         int status;
4530
4531         status = decode_op_hdr(xdr, OP_WRITE);
4532         if (status)
4533                 return status;
4534
4535         p = xdr_inline_decode(xdr, 16);
4536         if (unlikely(!p))
4537                 goto out_overflow;
4538         res->count = be32_to_cpup(p++);
4539         res->verf->committed = be32_to_cpup(p++);
4540         memcpy(res->verf->verifier, p, 8);
4541         return 0;
4542 out_overflow:
4543         print_overflow_msg(__func__, xdr);
4544         return -EIO;
4545 }
4546
4547 static int decode_delegreturn(struct xdr_stream *xdr)
4548 {
4549         return decode_op_hdr(xdr, OP_DELEGRETURN);
4550 }
4551
4552 #if defined(CONFIG_NFS_V4_1)
4553 static int decode_exchange_id(struct xdr_stream *xdr,
4554                               struct nfs41_exchange_id_res *res)
4555 {
4556         __be32 *p;
4557         uint32_t dummy;
4558         char *dummy_str;
4559         int status;
4560         struct nfs_client *clp = res->client;
4561
4562         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4563         if (status)
4564                 return status;
4565
4566         p = xdr_inline_decode(xdr, 8);
4567         if (unlikely(!p))
4568                 goto out_overflow;
4569         xdr_decode_hyper(p, &clp->cl_ex_clid);
4570         p = xdr_inline_decode(xdr, 12);
4571         if (unlikely(!p))
4572                 goto out_overflow;
4573         clp->cl_seqid = be32_to_cpup(p++);
4574         clp->cl_exchange_flags = be32_to_cpup(p++);
4575
4576         /* We ask for SP4_NONE */
4577         dummy = be32_to_cpup(p);
4578         if (dummy != SP4_NONE)
4579                 return -EIO;
4580
4581         /* Throw away minor_id */
4582         p = xdr_inline_decode(xdr, 8);
4583         if (unlikely(!p))
4584                 goto out_overflow;
4585
4586         /* Throw away Major id */
4587         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4588         if (unlikely(status))
4589                 return status;
4590
4591         /* Throw away server_scope */
4592         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4593         if (unlikely(status))
4594                 return status;
4595
4596         /* Throw away Implementation id array */
4597         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4598         if (unlikely(status))
4599                 return status;
4600
4601         return 0;
4602 out_overflow:
4603         print_overflow_msg(__func__, xdr);
4604         return -EIO;
4605 }
4606
4607 static int decode_chan_attrs(struct xdr_stream *xdr,
4608                              struct nfs4_channel_attrs *attrs)
4609 {
4610         __be32 *p;
4611         u32 nr_attrs;
4612
4613         p = xdr_inline_decode(xdr, 28);
4614         if (unlikely(!p))
4615                 goto out_overflow;
4616         attrs->headerpadsz = be32_to_cpup(p++);
4617         attrs->max_rqst_sz = be32_to_cpup(p++);
4618         attrs->max_resp_sz = be32_to_cpup(p++);
4619         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4620         attrs->max_ops = be32_to_cpup(p++);
4621         attrs->max_reqs = be32_to_cpup(p++);
4622         nr_attrs = be32_to_cpup(p);
4623         if (unlikely(nr_attrs > 1)) {
4624                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4625                         __func__, nr_attrs);
4626                 return -EINVAL;
4627         }
4628         if (nr_attrs == 1) {
4629                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4630                 if (unlikely(!p))
4631                         goto out_overflow;
4632         }
4633         return 0;
4634 out_overflow:
4635         print_overflow_msg(__func__, xdr);
4636         return -EIO;
4637 }
4638
4639 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4640 {
4641         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4642 }
4643
4644 static int decode_create_session(struct xdr_stream *xdr,
4645                                  struct nfs41_create_session_res *res)
4646 {
4647         __be32 *p;
4648         int status;
4649         struct nfs_client *clp = res->client;
4650         struct nfs4_session *session = clp->cl_session;
4651
4652         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4653         if (!status)
4654                 status = decode_sessionid(xdr, &session->sess_id);
4655         if (unlikely(status))
4656                 return status;
4657
4658         /* seqid, flags */
4659         p = xdr_inline_decode(xdr, 8);
4660         if (unlikely(!p))
4661                 goto out_overflow;
4662         clp->cl_seqid = be32_to_cpup(p++);
4663         session->flags = be32_to_cpup(p);
4664
4665         /* Channel attributes */
4666         status = decode_chan_attrs(xdr, &session->fc_attrs);
4667         if (!status)
4668                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4669         return status;
4670 out_overflow:
4671         print_overflow_msg(__func__, xdr);
4672         return -EIO;
4673 }
4674
4675 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4676 {
4677         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4678 }
4679
4680 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4681 {
4682         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4683 }
4684 #endif /* CONFIG_NFS_V4_1 */
4685
4686 static int decode_sequence(struct xdr_stream *xdr,
4687                            struct nfs4_sequence_res *res,
4688                            struct rpc_rqst *rqstp)
4689 {
4690 #if defined(CONFIG_NFS_V4_1)
4691         struct nfs4_sessionid id;
4692         u32 dummy;
4693         int status;
4694         __be32 *p;
4695
4696         if (!res->sr_session)
4697                 return 0;
4698
4699         status = decode_op_hdr(xdr, OP_SEQUENCE);
4700         if (!status)
4701                 status = decode_sessionid(xdr, &id);
4702         if (unlikely(status))
4703                 goto out_err;
4704
4705         /*
4706          * If the server returns different values for sessionID, slotID or
4707          * sequence number, the server is looney tunes.
4708          */
4709         status = -EREMOTEIO;
4710
4711         if (memcmp(id.data, res->sr_session->sess_id.data,
4712                    NFS4_MAX_SESSIONID_LEN)) {
4713                 dprintk("%s Invalid session id\n", __func__);
4714                 goto out_err;
4715         }
4716
4717         p = xdr_inline_decode(xdr, 20);
4718         if (unlikely(!p))
4719                 goto out_overflow;
4720
4721         /* seqid */
4722         dummy = be32_to_cpup(p++);
4723         if (dummy != res->sr_slot->seq_nr) {
4724                 dprintk("%s Invalid sequence number\n", __func__);
4725                 goto out_err;
4726         }
4727         /* slot id */
4728         dummy = be32_to_cpup(p++);
4729         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4730                 dprintk("%s Invalid slot id\n", __func__);
4731                 goto out_err;
4732         }
4733         /* highest slot id - currently not processed */
4734         dummy = be32_to_cpup(p++);
4735         /* target highest slot id - currently not processed */
4736         dummy = be32_to_cpup(p++);
4737         /* result flags */
4738         res->sr_status_flags = be32_to_cpup(p);
4739         status = 0;
4740 out_err:
4741         res->sr_status = status;
4742         return status;
4743 out_overflow:
4744         print_overflow_msg(__func__, xdr);
4745         status = -EIO;
4746         goto out_err;
4747 #else  /* CONFIG_NFS_V4_1 */
4748         return 0;
4749 #endif /* CONFIG_NFS_V4_1 */
4750 }
4751
4752 /*
4753  * END OF "GENERIC" DECODE ROUTINES.
4754  */
4755
4756 /*
4757  * Decode OPEN_DOWNGRADE response
4758  */
4759 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4760 {
4761         struct xdr_stream xdr;
4762         struct compound_hdr hdr;
4763         int status;
4764
4765         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4766         status = decode_compound_hdr(&xdr, &hdr);
4767         if (status)
4768                 goto out;
4769         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4770         if (status)
4771                 goto out;
4772         status = decode_putfh(&xdr);
4773         if (status)
4774                 goto out;
4775         status = decode_open_downgrade(&xdr, res);
4776         if (status != 0)
4777                 goto out;
4778         decode_getfattr(&xdr, res->fattr, res->server,
4779                         !RPC_IS_ASYNC(rqstp->rq_task));
4780 out:
4781         return status;
4782 }
4783
4784 /*
4785  * Decode ACCESS response
4786  */
4787 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4788 {
4789         struct xdr_stream xdr;
4790         struct compound_hdr hdr;
4791         int status;
4792
4793         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4794         status = decode_compound_hdr(&xdr, &hdr);
4795         if (status)
4796                 goto out;
4797         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4798         if (status)
4799                 goto out;
4800         status = decode_putfh(&xdr);
4801         if (status != 0)
4802                 goto out;
4803         status = decode_access(&xdr, res);
4804         if (status != 0)
4805                 goto out;
4806         decode_getfattr(&xdr, res->fattr, res->server,
4807                         !RPC_IS_ASYNC(rqstp->rq_task));
4808 out:
4809         return status;
4810 }
4811
4812 /*
4813  * Decode LOOKUP response
4814  */
4815 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4816 {
4817         struct xdr_stream xdr;
4818         struct compound_hdr hdr;
4819         int status;
4820
4821         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4822         status = decode_compound_hdr(&xdr, &hdr);
4823         if (status)
4824                 goto out;
4825         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4826         if (status)
4827                 goto out;
4828         if ((status = decode_putfh(&xdr)) != 0)
4829                 goto out;
4830         if ((status = decode_lookup(&xdr)) != 0)
4831                 goto out;
4832         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4833                 goto out;
4834         status = decode_getfattr(&xdr, res->fattr, res->server
4835                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4836 out:
4837         return status;
4838 }
4839
4840 /*
4841  * Decode LOOKUP_ROOT response
4842  */
4843 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4844 {
4845         struct xdr_stream xdr;
4846         struct compound_hdr hdr;
4847         int status;
4848
4849         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4850         status = decode_compound_hdr(&xdr, &hdr);
4851         if (status)
4852                 goto out;
4853         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4854         if (status)
4855                 goto out;
4856         if ((status = decode_putrootfh(&xdr)) != 0)
4857                 goto out;
4858         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4859                 status = decode_getfattr(&xdr, res->fattr, res->server,
4860                                 !RPC_IS_ASYNC(rqstp->rq_task));
4861 out:
4862         return status;
4863 }
4864
4865 /*
4866  * Decode REMOVE response
4867  */
4868 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4869 {
4870         struct xdr_stream xdr;
4871         struct compound_hdr hdr;
4872         int status;
4873
4874         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4875         status = decode_compound_hdr(&xdr, &hdr);
4876         if (status)
4877                 goto out;
4878         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4879         if (status)
4880                 goto out;
4881         if ((status = decode_putfh(&xdr)) != 0)
4882                 goto out;
4883         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4884                 goto out;
4885         decode_getfattr(&xdr, res->dir_attr, res->server,
4886                         !RPC_IS_ASYNC(rqstp->rq_task));
4887 out:
4888         return status;
4889 }
4890
4891 /*
4892  * Decode RENAME response
4893  */
4894 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
4895 {
4896         struct xdr_stream xdr;
4897         struct compound_hdr hdr;
4898         int status;
4899
4900         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4901         status = decode_compound_hdr(&xdr, &hdr);
4902         if (status)
4903                 goto out;
4904         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4905         if (status)
4906                 goto out;
4907         if ((status = decode_putfh(&xdr)) != 0)
4908                 goto out;
4909         if ((status = decode_savefh(&xdr)) != 0)
4910                 goto out;
4911         if ((status = decode_putfh(&xdr)) != 0)
4912                 goto out;
4913         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4914                 goto out;
4915         /* Current FH is target directory */
4916         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4917                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4918                 goto out;
4919         if ((status = decode_restorefh(&xdr)) != 0)
4920                 goto out;
4921         decode_getfattr(&xdr, res->old_fattr, res->server,
4922                         !RPC_IS_ASYNC(rqstp->rq_task));
4923 out:
4924         return status;
4925 }
4926
4927 /*
4928  * Decode LINK response
4929  */
4930 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4931 {
4932         struct xdr_stream xdr;
4933         struct compound_hdr hdr;
4934         int status;
4935
4936         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4937         status = decode_compound_hdr(&xdr, &hdr);
4938         if (status)
4939                 goto out;
4940         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4941         if (status)
4942                 goto out;
4943         if ((status = decode_putfh(&xdr)) != 0)
4944                 goto out;
4945         if ((status = decode_savefh(&xdr)) != 0)
4946                 goto out;
4947         if ((status = decode_putfh(&xdr)) != 0)
4948                 goto out;
4949         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4950                 goto out;
4951         /*
4952          * Note order: OP_LINK leaves the directory as the current
4953          *             filehandle.
4954          */
4955         if (decode_getfattr(&xdr, res->dir_attr, res->server,
4956                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4957                 goto out;
4958         if ((status = decode_restorefh(&xdr)) != 0)
4959                 goto out;
4960         decode_getfattr(&xdr, res->fattr, res->server,
4961                         !RPC_IS_ASYNC(rqstp->rq_task));
4962 out:
4963         return status;
4964 }
4965
4966 /*
4967  * Decode CREATE response
4968  */
4969 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4970 {
4971         struct xdr_stream xdr;
4972         struct compound_hdr hdr;
4973         int status;
4974
4975         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4976         status = decode_compound_hdr(&xdr, &hdr);
4977         if (status)
4978                 goto out;
4979         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4980         if (status)
4981                 goto out;
4982         if ((status = decode_putfh(&xdr)) != 0)
4983                 goto out;
4984         if ((status = decode_savefh(&xdr)) != 0)
4985                 goto out;
4986         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4987                 goto out;
4988         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4989                 goto out;
4990         if (decode_getfattr(&xdr, res->fattr, res->server,
4991                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4992                 goto out;
4993         if ((status = decode_restorefh(&xdr)) != 0)
4994                 goto out;
4995         decode_getfattr(&xdr, res->dir_fattr, res->server,
4996                         !RPC_IS_ASYNC(rqstp->rq_task));
4997 out:
4998         return status;
4999 }
5000
5001 /*
5002  * Decode SYMLINK response
5003  */
5004 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
5005 {
5006         return nfs4_xdr_dec_create(rqstp, p, res);
5007 }
5008
5009 /*
5010  * Decode GETATTR response
5011  */
5012 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
5013 {
5014         struct xdr_stream xdr;
5015         struct compound_hdr hdr;
5016         int status;
5017
5018         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5019         status = decode_compound_hdr(&xdr, &hdr);
5020         if (status)
5021                 goto out;
5022         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5023         if (status)
5024                 goto out;
5025         status = decode_putfh(&xdr);
5026         if (status)
5027                 goto out;
5028         status = decode_getfattr(&xdr, res->fattr, res->server,
5029                         !RPC_IS_ASYNC(rqstp->rq_task));
5030 out:
5031         return status;
5032 }
5033
5034 /*
5035  * Encode an SETACL request
5036  */
5037 static int
5038 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5039 {
5040         struct xdr_stream xdr;
5041         struct compound_hdr hdr = {
5042                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5043         };
5044         int status;
5045
5046         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5047         encode_compound_hdr(&xdr, req, &hdr);
5048         encode_sequence(&xdr, &args->seq_args, &hdr);
5049         encode_putfh(&xdr, args->fh, &hdr);
5050         status = encode_setacl(&xdr, args, &hdr);
5051         encode_nops(&hdr);
5052         return status;
5053 }
5054
5055 /*
5056  * Decode SETACL response
5057  */
5058 static int
5059 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
5060                     struct nfs_setaclres *res)
5061 {
5062         struct xdr_stream xdr;
5063         struct compound_hdr hdr;
5064         int status;
5065
5066         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5067         status = decode_compound_hdr(&xdr, &hdr);
5068         if (status)
5069                 goto out;
5070         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5071         if (status)
5072                 goto out;
5073         status = decode_putfh(&xdr);
5074         if (status)
5075                 goto out;
5076         status = decode_setattr(&xdr);
5077 out:
5078         return status;
5079 }
5080
5081 /*
5082  * Decode GETACL response
5083  */
5084 static int
5085 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5086                     struct nfs_getaclres *res)
5087 {
5088         struct xdr_stream xdr;
5089         struct compound_hdr hdr;
5090         int status;
5091
5092         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5093         status = decode_compound_hdr(&xdr, &hdr);
5094         if (status)
5095                 goto out;
5096         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5097         if (status)
5098                 goto out;
5099         status = decode_putfh(&xdr);
5100         if (status)
5101                 goto out;
5102         status = decode_getacl(&xdr, rqstp, &res->acl_len);
5103
5104 out:
5105         return status;
5106 }
5107
5108 /*
5109  * Decode CLOSE response
5110  */
5111 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5112 {
5113         struct xdr_stream xdr;
5114         struct compound_hdr hdr;
5115         int status;
5116
5117         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5118         status = decode_compound_hdr(&xdr, &hdr);
5119         if (status)
5120                 goto out;
5121         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5122         if (status)
5123                 goto out;
5124         status = decode_putfh(&xdr);
5125         if (status)
5126                 goto out;
5127         status = decode_close(&xdr, res);
5128         if (status != 0)
5129                 goto out;
5130         /*
5131          * Note: Server may do delete on close for this file
5132          *      in which case the getattr call will fail with
5133          *      an ESTALE error. Shouldn't be a problem,
5134          *      though, since fattr->valid will remain unset.
5135          */
5136         decode_getfattr(&xdr, res->fattr, res->server,
5137                         !RPC_IS_ASYNC(rqstp->rq_task));
5138 out:
5139         return status;
5140 }
5141
5142 /*
5143  * Decode OPEN response
5144  */
5145 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5146 {
5147         struct xdr_stream xdr;
5148         struct compound_hdr hdr;
5149         int status;
5150
5151         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5152         status = decode_compound_hdr(&xdr, &hdr);
5153         if (status)
5154                 goto out;
5155         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5156         if (status)
5157                 goto out;
5158         status = decode_putfh(&xdr);
5159         if (status)
5160                 goto out;
5161         status = decode_savefh(&xdr);
5162         if (status)
5163                 goto out;
5164         status = decode_open(&xdr, res);
5165         if (status)
5166                 goto out;
5167         if (decode_getfh(&xdr, &res->fh) != 0)
5168                 goto out;
5169         if (decode_getfattr(&xdr, res->f_attr, res->server,
5170                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5171                 goto out;
5172         if (decode_restorefh(&xdr) != 0)
5173                 goto out;
5174         decode_getfattr(&xdr, res->dir_attr, res->server,
5175                         !RPC_IS_ASYNC(rqstp->rq_task));
5176 out:
5177         return status;
5178 }
5179
5180 /*
5181  * Decode OPEN_CONFIRM response
5182  */
5183 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5184 {
5185         struct xdr_stream xdr;
5186         struct compound_hdr hdr;
5187         int status;
5188
5189         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5190         status = decode_compound_hdr(&xdr, &hdr);
5191         if (status)
5192                 goto out;
5193         status = decode_putfh(&xdr);
5194         if (status)
5195                 goto out;
5196         status = decode_open_confirm(&xdr, res);
5197 out:
5198         return status;
5199 }
5200
5201 /*
5202  * Decode OPEN response
5203  */
5204 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5205 {
5206         struct xdr_stream xdr;
5207         struct compound_hdr hdr;
5208         int status;
5209
5210         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5211         status = decode_compound_hdr(&xdr, &hdr);
5212         if (status)
5213                 goto out;
5214         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5215         if (status)
5216                 goto out;
5217         status = decode_putfh(&xdr);
5218         if (status)
5219                 goto out;
5220         status = decode_open(&xdr, res);
5221         if (status)
5222                 goto out;
5223         decode_getfattr(&xdr, res->f_attr, res->server,
5224                         !RPC_IS_ASYNC(rqstp->rq_task));
5225 out:
5226         return status;
5227 }
5228
5229 /*
5230  * Decode SETATTR response
5231  */
5232 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5233 {
5234         struct xdr_stream xdr;
5235         struct compound_hdr hdr;
5236         int status;
5237
5238         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5239         status = decode_compound_hdr(&xdr, &hdr);
5240         if (status)
5241                 goto out;
5242         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5243         if (status)
5244                 goto out;
5245         status = decode_putfh(&xdr);
5246         if (status)
5247                 goto out;
5248         status = decode_setattr(&xdr);
5249         if (status)
5250                 goto out;
5251         decode_getfattr(&xdr, res->fattr, res->server,
5252                         !RPC_IS_ASYNC(rqstp->rq_task));
5253 out:
5254         return status;
5255 }
5256
5257 /*
5258  * Decode LOCK response
5259  */
5260 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5261 {
5262         struct xdr_stream xdr;
5263         struct compound_hdr hdr;
5264         int status;
5265
5266         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5267         status = decode_compound_hdr(&xdr, &hdr);
5268         if (status)
5269                 goto out;
5270         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5271         if (status)
5272                 goto out;
5273         status = decode_putfh(&xdr);
5274         if (status)
5275                 goto out;
5276         status = decode_lock(&xdr, res);
5277 out:
5278         return status;
5279 }
5280
5281 /*
5282  * Decode LOCKT response
5283  */
5284 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5285 {
5286         struct xdr_stream xdr;
5287         struct compound_hdr hdr;
5288         int status;
5289
5290         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5291         status = decode_compound_hdr(&xdr, &hdr);
5292         if (status)
5293                 goto out;
5294         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5295         if (status)
5296                 goto out;
5297         status = decode_putfh(&xdr);
5298         if (status)
5299                 goto out;
5300         status = decode_lockt(&xdr, res);
5301 out:
5302         return status;
5303 }
5304
5305 /*
5306  * Decode LOCKU response
5307  */
5308 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5309 {
5310         struct xdr_stream xdr;
5311         struct compound_hdr hdr;
5312         int status;
5313
5314         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5315         status = decode_compound_hdr(&xdr, &hdr);
5316         if (status)
5317                 goto out;
5318         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5319         if (status)
5320                 goto out;
5321         status = decode_putfh(&xdr);
5322         if (status)
5323                 goto out;
5324         status = decode_locku(&xdr, res);
5325 out:
5326         return status;
5327 }
5328
5329 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5330 {
5331         struct xdr_stream xdr;
5332         struct compound_hdr hdr;
5333         int status;
5334
5335         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5336         status = decode_compound_hdr(&xdr, &hdr);
5337         if (!status)
5338                 status = decode_release_lockowner(&xdr);
5339         return status;
5340 }
5341
5342 /*
5343  * Decode READLINK response
5344  */
5345 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5346                                  struct nfs4_readlink_res *res)
5347 {
5348         struct xdr_stream xdr;
5349         struct compound_hdr hdr;
5350         int status;
5351
5352         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5353         status = decode_compound_hdr(&xdr, &hdr);
5354         if (status)
5355                 goto out;
5356         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5357         if (status)
5358                 goto out;
5359         status = decode_putfh(&xdr);
5360         if (status)
5361                 goto out;
5362         status = decode_readlink(&xdr, rqstp);
5363 out:
5364         return status;
5365 }
5366
5367 /*
5368  * Decode READDIR response
5369  */
5370 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5371 {
5372         struct xdr_stream xdr;
5373         struct compound_hdr hdr;
5374         int status;
5375
5376         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5377         status = decode_compound_hdr(&xdr, &hdr);
5378         if (status)
5379                 goto out;
5380         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5381         if (status)
5382                 goto out;
5383         status = decode_putfh(&xdr);
5384         if (status)
5385                 goto out;
5386         status = decode_readdir(&xdr, rqstp, res);
5387 out:
5388         return status;
5389 }
5390
5391 /*
5392  * Decode Read response
5393  */
5394 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5395 {
5396         struct xdr_stream xdr;
5397         struct compound_hdr hdr;
5398         int status;
5399
5400         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5401         status = decode_compound_hdr(&xdr, &hdr);
5402         if (status)
5403                 goto out;
5404         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5405         if (status)
5406                 goto out;
5407         status = decode_putfh(&xdr);
5408         if (status)
5409                 goto out;
5410         status = decode_read(&xdr, rqstp, res);
5411         if (!status)
5412                 status = res->count;
5413 out:
5414         return status;
5415 }
5416
5417 /*
5418  * Decode WRITE response
5419  */
5420 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5421 {
5422         struct xdr_stream xdr;
5423         struct compound_hdr hdr;
5424         int status;
5425
5426         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5427         status = decode_compound_hdr(&xdr, &hdr);
5428         if (status)
5429                 goto out;
5430         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5431         if (status)
5432                 goto out;
5433         status = decode_putfh(&xdr);
5434         if (status)
5435                 goto out;
5436         status = decode_write(&xdr, res);
5437         if (status)
5438                 goto out;
5439         decode_getfattr(&xdr, res->fattr, res->server,
5440                         !RPC_IS_ASYNC(rqstp->rq_task));
5441         if (!status)
5442                 status = res->count;
5443 out:
5444         return status;
5445 }
5446
5447 /*
5448  * Decode COMMIT response
5449  */
5450 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5451 {
5452         struct xdr_stream xdr;
5453         struct compound_hdr hdr;
5454         int status;
5455
5456         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5457         status = decode_compound_hdr(&xdr, &hdr);
5458         if (status)
5459                 goto out;
5460         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5461         if (status)
5462                 goto out;
5463         status = decode_putfh(&xdr);
5464         if (status)
5465                 goto out;
5466         status = decode_commit(&xdr, res);
5467         if (status)
5468                 goto out;
5469         decode_getfattr(&xdr, res->fattr, res->server,
5470                         !RPC_IS_ASYNC(rqstp->rq_task));
5471 out:
5472         return status;
5473 }
5474
5475 /*
5476  * Decode FSINFO response
5477  */
5478 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5479                                struct nfs4_fsinfo_res *res)
5480 {
5481         struct xdr_stream xdr;
5482         struct compound_hdr hdr;
5483         int status;
5484
5485         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5486         status = decode_compound_hdr(&xdr, &hdr);
5487         if (!status)
5488                 status = decode_sequence(&xdr, &res->seq_res, req);
5489         if (!status)
5490                 status = decode_putfh(&xdr);
5491         if (!status)
5492                 status = decode_fsinfo(&xdr, res->fsinfo);
5493         return status;
5494 }
5495
5496 /*
5497  * Decode PATHCONF response
5498  */
5499 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5500                                  struct nfs4_pathconf_res *res)
5501 {
5502         struct xdr_stream xdr;
5503         struct compound_hdr hdr;
5504         int status;
5505
5506         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5507         status = decode_compound_hdr(&xdr, &hdr);
5508         if (!status)
5509                 status = decode_sequence(&xdr, &res->seq_res, req);
5510         if (!status)
5511                 status = decode_putfh(&xdr);
5512         if (!status)
5513                 status = decode_pathconf(&xdr, res->pathconf);
5514         return status;
5515 }
5516
5517 /*
5518  * Decode STATFS response
5519  */
5520 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5521                                struct nfs4_statfs_res *res)
5522 {
5523         struct xdr_stream xdr;
5524         struct compound_hdr hdr;
5525         int status;
5526
5527         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5528         status = decode_compound_hdr(&xdr, &hdr);
5529         if (!status)
5530                 status = decode_sequence(&xdr, &res->seq_res, req);
5531         if (!status)
5532                 status = decode_putfh(&xdr);
5533         if (!status)
5534                 status = decode_statfs(&xdr, res->fsstat);
5535         return status;
5536 }
5537
5538 /*
5539  * Decode GETATTR_BITMAP response
5540  */
5541 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5542 {
5543         struct xdr_stream xdr;
5544         struct compound_hdr hdr;
5545         int status;
5546
5547         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5548         status = decode_compound_hdr(&xdr, &hdr);
5549         if (status)
5550                 goto out;
5551         status = decode_sequence(&xdr, &res->seq_res, req);
5552         if (status)
5553                 goto out;
5554         if ((status = decode_putfh(&xdr)) != 0)
5555                 goto out;
5556         status = decode_server_caps(&xdr, res);
5557 out:
5558         return status;
5559 }
5560
5561 /*
5562  * Decode RENEW response
5563  */
5564 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5565 {
5566         struct xdr_stream xdr;
5567         struct compound_hdr hdr;
5568         int status;
5569
5570         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5571         status = decode_compound_hdr(&xdr, &hdr);
5572         if (!status)
5573                 status = decode_renew(&xdr);
5574         return status;
5575 }
5576
5577 /*
5578  * Decode SETCLIENTID response
5579  */
5580 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5581                 struct nfs4_setclientid_res *res)
5582 {
5583         struct xdr_stream xdr;
5584         struct compound_hdr hdr;
5585         int status;
5586
5587         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5588         status = decode_compound_hdr(&xdr, &hdr);
5589         if (!status)
5590                 status = decode_setclientid(&xdr, res);
5591         return status;
5592 }
5593
5594 /*
5595  * Decode SETCLIENTID_CONFIRM response
5596  */
5597 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5598 {
5599         struct xdr_stream xdr;
5600         struct compound_hdr hdr;
5601         int status;
5602
5603         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5604         status = decode_compound_hdr(&xdr, &hdr);
5605         if (!status)
5606                 status = decode_setclientid_confirm(&xdr);
5607         if (!status)
5608                 status = decode_putrootfh(&xdr);
5609         if (!status)
5610                 status = decode_fsinfo(&xdr, fsinfo);
5611         return status;
5612 }
5613
5614 /*
5615  * Decode DELEGRETURN response
5616  */
5617 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5618 {
5619         struct xdr_stream xdr;
5620         struct compound_hdr hdr;
5621         int status;
5622
5623         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5624         status = decode_compound_hdr(&xdr, &hdr);
5625         if (status)
5626                 goto out;
5627         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5628         if (status)
5629                 goto out;
5630         status = decode_putfh(&xdr);
5631         if (status != 0)
5632                 goto out;
5633         status = decode_delegreturn(&xdr);
5634         if (status != 0)
5635                 goto out;
5636         decode_getfattr(&xdr, res->fattr, res->server,
5637                         !RPC_IS_ASYNC(rqstp->rq_task));
5638 out:
5639         return status;
5640 }
5641
5642 /*
5643  * Decode FS_LOCATIONS response
5644  */
5645 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5646                                      struct nfs4_fs_locations_res *res)
5647 {
5648         struct xdr_stream xdr;
5649         struct compound_hdr hdr;
5650         int status;
5651
5652         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5653         status = decode_compound_hdr(&xdr, &hdr);
5654         if (status)
5655                 goto out;
5656         status = decode_sequence(&xdr, &res->seq_res, req);
5657         if (status)
5658                 goto out;
5659         if ((status = decode_putfh(&xdr)) != 0)
5660                 goto out;
5661         if ((status = decode_lookup(&xdr)) != 0)
5662                 goto out;
5663         xdr_enter_page(&xdr, PAGE_SIZE);
5664         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5665                                  res->fs_locations->server,
5666                                  !RPC_IS_ASYNC(req->rq_task));
5667 out:
5668         return status;
5669 }
5670
5671 #if defined(CONFIG_NFS_V4_1)
5672 /*
5673  * Decode EXCHANGE_ID response
5674  */
5675 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5676                                     void *res)
5677 {
5678         struct xdr_stream xdr;
5679         struct compound_hdr hdr;
5680         int status;
5681
5682         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5683         status = decode_compound_hdr(&xdr, &hdr);
5684         if (!status)
5685                 status = decode_exchange_id(&xdr, res);
5686         return status;
5687 }
5688
5689 /*
5690  * Decode CREATE_SESSION response
5691  */
5692 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5693                                        struct nfs41_create_session_res *res)
5694 {
5695         struct xdr_stream xdr;
5696         struct compound_hdr hdr;
5697         int status;
5698
5699         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5700         status = decode_compound_hdr(&xdr, &hdr);
5701         if (!status)
5702                 status = decode_create_session(&xdr, res);
5703         return status;
5704 }
5705
5706 /*
5707  * Decode DESTROY_SESSION response
5708  */
5709 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5710                                         void *dummy)
5711 {
5712         struct xdr_stream xdr;
5713         struct compound_hdr hdr;
5714         int status;
5715
5716         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5717         status = decode_compound_hdr(&xdr, &hdr);
5718         if (!status)
5719                 status = decode_destroy_session(&xdr, dummy);
5720         return status;
5721 }
5722
5723 /*
5724  * Decode SEQUENCE response
5725  */
5726 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5727                                  struct nfs4_sequence_res *res)
5728 {
5729         struct xdr_stream xdr;
5730         struct compound_hdr hdr;
5731         int status;
5732
5733         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5734         status = decode_compound_hdr(&xdr, &hdr);
5735         if (!status)
5736                 status = decode_sequence(&xdr, res, rqstp);
5737         return status;
5738 }
5739
5740 /*
5741  * Decode GET_LEASE_TIME response
5742  */
5743 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5744                                        struct nfs4_get_lease_time_res *res)
5745 {
5746         struct xdr_stream xdr;
5747         struct compound_hdr hdr;
5748         int status;
5749
5750         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5751         status = decode_compound_hdr(&xdr, &hdr);
5752         if (!status)
5753                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5754         if (!status)
5755                 status = decode_putrootfh(&xdr);
5756         if (!status)
5757                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5758         return status;
5759 }
5760
5761 /*
5762  * Decode RECLAIM_COMPLETE response
5763  */
5764 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5765                                          struct nfs41_reclaim_complete_res *res)
5766 {
5767         struct xdr_stream xdr;
5768         struct compound_hdr hdr;
5769         int status;
5770
5771         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5772         status = decode_compound_hdr(&xdr, &hdr);
5773         if (!status)
5774                 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5775         if (!status)
5776                 status = decode_reclaim_complete(&xdr, (void *)NULL);
5777         return status;
5778 }
5779 #endif /* CONFIG_NFS_V4_1 */
5780
5781 __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
5782                            struct nfs_server *server, int plus)
5783 {
5784         uint32_t bitmap[2] = {0};
5785         uint32_t len;
5786         __be32 *p = xdr_inline_decode(xdr, 4);
5787         if (unlikely(!p))
5788                 goto out_overflow;
5789         if (!ntohl(*p++)) {
5790                 p = xdr_inline_decode(xdr, 4);
5791                 if (unlikely(!p))
5792                         goto out_overflow;
5793                 if (!ntohl(*p++))
5794                         return ERR_PTR(-EAGAIN);
5795                 entry->eof = 1;
5796                 return ERR_PTR(-EBADCOOKIE);
5797         }
5798
5799         p = xdr_inline_decode(xdr, 12);
5800         if (unlikely(!p))
5801                 goto out_overflow;
5802         entry->prev_cookie = entry->cookie;
5803         p = xdr_decode_hyper(p, &entry->cookie);
5804         entry->len = ntohl(*p++);
5805
5806         p = xdr_inline_decode(xdr, entry->len + 4);
5807         if (unlikely(!p))
5808                 goto out_overflow;
5809         entry->name = (const char *) p;
5810         p += XDR_QUADLEN(entry->len);
5811
5812         /*
5813          * In case the server doesn't return an inode number,
5814          * we fake one here.  (We don't use inode number 0,
5815          * since glibc seems to choke on it...)
5816          */
5817         entry->ino = 1;
5818
5819         len = ntohl(*p++);              /* bitmap length */
5820         if (len-- > 0) {
5821                 p = xdr_inline_decode(xdr, 4);
5822                 if (unlikely(!p))
5823                         goto out_overflow;
5824                 bitmap[0] = ntohl(*p++);
5825                 if (len-- > 0) {
5826                         p = xdr_inline_decode(xdr, 4);
5827                         if (unlikely(!p))
5828                                 goto out_overflow;
5829                         bitmap[1] = ntohl(*p++);
5830                         p += len;
5831                 }
5832         }
5833         p = xdr_inline_decode(xdr, 4);
5834         if (unlikely(!p))
5835                 goto out_overflow;
5836         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
5837         if (len > 0) {
5838                 if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
5839                         goto out_overflow;
5840                 if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
5841                         entry->ino = entry->fattr->fileid;
5842         }
5843
5844         p = xdr_inline_peek(xdr, 8);
5845         if (p != NULL)
5846                 entry->eof = !p[0] && p[1];
5847         else
5848                 entry->eof = 0;
5849
5850         return p;
5851
5852 out_overflow:
5853         print_overflow_msg(__func__, xdr);
5854         return ERR_PTR(-EIO);
5855 }
5856
5857 /*
5858  * We need to translate between nfs status return values and
5859  * the local errno values which may not be the same.
5860  */
5861 static struct {
5862         int stat;
5863         int errno;
5864 } nfs_errtbl[] = {
5865         { NFS4_OK,              0               },
5866         { NFS4ERR_PERM,         -EPERM          },
5867         { NFS4ERR_NOENT,        -ENOENT         },
5868         { NFS4ERR_IO,           -errno_NFSERR_IO},
5869         { NFS4ERR_NXIO,         -ENXIO          },
5870         { NFS4ERR_ACCESS,       -EACCES         },
5871         { NFS4ERR_EXIST,        -EEXIST         },
5872         { NFS4ERR_XDEV,         -EXDEV          },
5873         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5874         { NFS4ERR_ISDIR,        -EISDIR         },
5875         { NFS4ERR_INVAL,        -EINVAL         },
5876         { NFS4ERR_FBIG,         -EFBIG          },
5877         { NFS4ERR_NOSPC,        -ENOSPC         },
5878         { NFS4ERR_ROFS,         -EROFS          },
5879         { NFS4ERR_MLINK,        -EMLINK         },
5880         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5881         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5882         { NFS4ERR_DQUOT,        -EDQUOT         },
5883         { NFS4ERR_STALE,        -ESTALE         },
5884         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5885         { NFS4ERR_BADOWNER,     -EINVAL         },
5886         { NFS4ERR_BADNAME,      -EINVAL         },
5887         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5888         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5889         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5890         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
5891         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5892         { NFS4ERR_LOCKED,       -EAGAIN         },
5893         { NFS4ERR_SYMLINK,      -ELOOP          },
5894         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5895         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5896         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5897                                                     * to be handled by a
5898                                                     * middle-layer.
5899                                                     */
5900         { -1,                   -EIO            }
5901 };
5902
5903 /*
5904  * Convert an NFS error code to a local one.
5905  * This one is used jointly by NFSv2 and NFSv3.
5906  */
5907 static int
5908 nfs4_stat_to_errno(int stat)
5909 {
5910         int i;
5911         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5912                 if (nfs_errtbl[i].stat == stat)
5913                         return nfs_errtbl[i].errno;
5914         }
5915         if (stat <= 10000 || stat > 10100) {
5916                 /* The server is looney tunes. */
5917                 return -EREMOTEIO;
5918         }
5919         /* If we cannot translate the error, the recovery routines should
5920          * handle it.
5921          * Note: remaining NFSv4 error codes have values > 10000, so should
5922          * not conflict with native Linux error codes.
5923          */
5924         return -stat;
5925 }
5926
5927 #define PROC(proc, argtype, restype)                            \
5928 [NFSPROC4_CLNT_##proc] = {                                      \
5929         .p_proc   = NFSPROC4_COMPOUND,                          \
5930         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5931         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5932         .p_arglen = NFS4_##argtype##_sz,                        \
5933         .p_replen = NFS4_##restype##_sz,                        \
5934         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5935         .p_name   = #proc,                                      \
5936 }
5937
5938 struct rpc_procinfo     nfs4_procedures[] = {
5939   PROC(READ,            enc_read,       dec_read),
5940   PROC(WRITE,           enc_write,      dec_write),
5941   PROC(COMMIT,          enc_commit,     dec_commit),
5942   PROC(OPEN,            enc_open,       dec_open),
5943   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5944   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5945   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5946   PROC(CLOSE,           enc_close,      dec_close),
5947   PROC(SETATTR,         enc_setattr,    dec_setattr),
5948   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5949   PROC(RENEW,           enc_renew,      dec_renew),
5950   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5951   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5952   PROC(LOCK,            enc_lock,       dec_lock),
5953   PROC(LOCKT,           enc_lockt,      dec_lockt),
5954   PROC(LOCKU,           enc_locku,      dec_locku),
5955   PROC(ACCESS,          enc_access,     dec_access),
5956   PROC(GETATTR,         enc_getattr,    dec_getattr),
5957   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5958   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5959   PROC(REMOVE,          enc_remove,     dec_remove),
5960   PROC(RENAME,          enc_rename,     dec_rename),
5961   PROC(LINK,            enc_link,       dec_link),
5962   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5963   PROC(CREATE,          enc_create,     dec_create),
5964   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5965   PROC(STATFS,          enc_statfs,     dec_statfs),
5966   PROC(READLINK,        enc_readlink,   dec_readlink),
5967   PROC(READDIR,         enc_readdir,    dec_readdir),
5968   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5969   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5970   PROC(GETACL,          enc_getacl,     dec_getacl),
5971   PROC(SETACL,          enc_setacl,     dec_setacl),
5972   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5973   PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
5974 #if defined(CONFIG_NFS_V4_1)
5975   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5976   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
5977   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
5978   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
5979   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
5980   PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
5981 #endif /* CONFIG_NFS_V4_1 */
5982 };
5983
5984 struct rpc_version              nfs_version4 = {
5985         .number                 = 4,
5986         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5987         .procs                  = nfs4_procedures
5988 };
5989
5990 /*
5991  * Local variables:
5992  *  c-basic-offset: 8
5993  * End:
5994  */