fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/nfs.h>
  50 #include <linux/nfs4.h>
  51 #include <linux/nfs_fs.h>
  52 #include <linux/nfs_idmap.h>
  53 #include "nfs4_fs.h"
  54 #include "internal.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_XDR
  57
  58 /* Mapping from NFS error code to "errno" error code. */
  59 #define errno_NFSERR_IO         EIO
  60
  61 static int nfs4_stat_to_errno(int);
  62
  63 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  64 #ifdef DEBUG
  65 #define NFS4_MAXTAGLEN          20
  66 #else
  67 #define NFS4_MAXTAGLEN          0
  68 #endif
  69
  70 /* lock,open owner id:
  71  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  72  */
  73 #define open_owner_id_maxsz     (1 + 4)
  74 #define lock_owner_id_maxsz     (1 + 4)
  75 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  76 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  77 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define op_encode_hdr_maxsz     (1)
  79 #define op_decode_hdr_maxsz     (2)
  80 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  81 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  83 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  85                                 (NFS4_FHSIZE >> 2))
  86 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  87 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  88 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  89 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  90 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  91                                 ((3+NFS4_FHSIZE) >> 2))
  92 #define nfs4_fattr_bitmap_maxsz 3
  93 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  94 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  95 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  96 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  97 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 /* This is based on getfattr, which uses the most attributes: */
  99 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 100                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 101 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 102                                 nfs4_fattr_value_maxsz)
 103 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 104 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 105                                  1 + 2 + 1 + \
 106                                 nfs4_owner_maxsz + \
 107                                 nfs4_group_maxsz + \
 108                                 4 + 4)
 109 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 110 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 111 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 112 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 113 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 114 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 115 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 116 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 117 #define encode_setclientid_maxsz \
 118                                 (op_encode_hdr_maxsz + \
 119                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 120                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 121                                 1 /* sc_prog */ + \
 122                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 123                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 124                                 1) /* sc_cb_ident */
 125 #define decode_setclientid_maxsz \
 126                                 (op_decode_hdr_maxsz + \
 127                                 2 + \
 128                                 1024) /* large value for CLID_INUSE */
 129 #define encode_setclientid_confirm_maxsz \
 130                                 (op_encode_hdr_maxsz + \
 131                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 132 #define decode_setclientid_confirm_maxsz \
 133                                 (op_decode_hdr_maxsz)
 134 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 135 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 136 #define encode_share_access_maxsz \
 137                                 (2)
 138 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 139 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 140 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 141 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 142                                 2 + encode_share_access_maxsz + 2 + \
 143                                 open_owner_id_maxsz + \
 144                                 encode_opentype_maxsz + \
 145                                 encode_claim_null_maxsz)
 146 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 147 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 148                                 decode_ace_maxsz)
 149 #define decode_change_info_maxsz        (5)
 150 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 151                                 decode_stateid_maxsz + \
 152                                 decode_change_info_maxsz + 1 + \
 153                                 nfs4_fattr_bitmap_maxsz + \
 154                                 decode_delegation_maxsz)
 155 #define encode_open_confirm_maxsz \
 156                                 (op_encode_hdr_maxsz + \
 157                                  encode_stateid_maxsz + 1)
 158 #define decode_open_confirm_maxsz \
 159                                 (op_decode_hdr_maxsz + \
 160                                  decode_stateid_maxsz)
 161 #define encode_open_downgrade_maxsz \
 162                                 (op_encode_hdr_maxsz + \
 163                                  encode_stateid_maxsz + 1 + \
 164                                  encode_share_access_maxsz)
 165 #define decode_open_downgrade_maxsz \
 166                                 (op_decode_hdr_maxsz + \
 167                                  decode_stateid_maxsz)
 168 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 169                                  1 + encode_stateid_maxsz)
 170 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 171                                  decode_stateid_maxsz)
 172 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 173                                  encode_stateid_maxsz + \
 174                                  encode_attrs_maxsz)
 175 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 176                                  nfs4_fattr_bitmap_maxsz)
 177 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 178                                  encode_stateid_maxsz + 3)
 179 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 180 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 181                                  2 + encode_verifier_maxsz + 5)
 182 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 183                                  decode_verifier_maxsz)
 184 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 185 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 186 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 187                                  encode_stateid_maxsz + 4)
 188 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 189                                  2 + decode_verifier_maxsz)
 190 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 191 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 192                                  decode_verifier_maxsz)
 193 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 194                                 nfs4_name_maxsz)
 195 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 196                                  decode_change_info_maxsz)
 197 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 198                                 2 * nfs4_name_maxsz)
 199 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 200                                  decode_change_info_maxsz + \
 201                                  decode_change_info_maxsz)
 202 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 203                                 nfs4_name_maxsz)
 204 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 205 #define encode_lockowner_maxsz  (7)
 206 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 207                                  7 + \
 208                                  1 + encode_stateid_maxsz + 1 + \
 209                                  encode_lockowner_maxsz)
 210 #define decode_lock_denied_maxsz \
 211                                 (8 + decode_lockowner_maxsz)
 212 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 213                                  decode_lock_denied_maxsz)
 214 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 215                                 encode_lockowner_maxsz)
 216 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 217                                  decode_lock_denied_maxsz)
 218 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 219                                  encode_stateid_maxsz + \
 220                                  4)
 221 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 222                                  decode_stateid_maxsz)
 223 #define encode_release_lockowner_maxsz \
 224                                 (op_encode_hdr_maxsz + \
 225                                  encode_lockowner_maxsz)
 226 #define decode_release_lockowner_maxsz \
 227                                 (op_decode_hdr_maxsz)
 228 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 229 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 230 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 231                                 1 + nfs4_name_maxsz + \
 232                                 1 + \
 233                                 nfs4_fattr_maxsz)
 234 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 235 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 236                                 1 + 2 + nfs4_name_maxsz + \
 237                                 encode_attrs_maxsz)
 238 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 239                                 decode_change_info_maxsz + \
 240                                 nfs4_fattr_bitmap_maxsz)
 241 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 242 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 243 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 244 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 245 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 246 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 247                                  nfs4_fattr_bitmap_maxsz + 1)
 248 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 249                                  encode_stateid_maxsz + 3)
 250 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 251 #define encode_fs_locations_maxsz \
 252                                 (encode_getattr_maxsz)
 253 #define decode_fs_locations_maxsz \
 254                                 (0)
 255
 256 #if defined(CONFIG_NFS_V4_1)
 257 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 258
 259 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 260                                 encode_verifier_maxsz + \
 261                                 1 /* co_ownerid.len */ + \
 262                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 263                                 1 /* flags */ + \
 264                                 1 /* spa_how */ + \
 265                                 0 /* SP4_NONE (for now) */ + \
 266                                 1 /* zero implemetation id array */)
 267 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 268                                 2 /* eir_clientid */ + \
 269                                 1 /* eir_sequenceid */ + \
 270                                 1 /* eir_flags */ + \
 271                                 1 /* spr_how */ + \
 272                                 0 /* SP4_NONE (for now) */ + \
 273                                 2 /* eir_server_owner.so_minor_id */ + \
 274                                 /* eir_server_owner.so_major_id<> */ \
 275                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 276                                 /* eir_server_scope<> */ \
 277                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 278                                 1 /* eir_server_impl_id array length */ + \
 279                                 0 /* ignored eir_server_impl_id contents */)
 280 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 281 #define decode_channel_attrs_maxsz  (6 + \
 282                                      1 /* ca_rdma_ird.len */ + \
 283                                      1 /* ca_rdma_ird */)
 284 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 285                                      2 /* csa_clientid */ + \
 286                                      1 /* csa_sequence */ + \
 287                                      1 /* csa_flags */ + \
 288                                      encode_channel_attrs_maxsz + \
 289                                      encode_channel_attrs_maxsz + \
 290                                      1 /* csa_cb_program */ + \
 291                                      1 /* csa_sec_parms.len (1) */ + \
 292                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 293                                      1 /* stamp */ + \
 294                                      1 /* machinename.len */ + \
 295                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 296                                      1 /* uid */ + \
 297                                      1 /* gid */ + \
 298                                      1 /* gids.len (0) */)
 299 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 300                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 301                                      1 /* csr_sequence */ + \
 302                                      1 /* csr_flags */ + \
 303                                      decode_channel_attrs_maxsz + \
 304                                      decode_channel_attrs_maxsz)
 305 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 306 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 307 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 308                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 309 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 310                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 311 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 312 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 313 #else /* CONFIG_NFS_V4_1 */
 314 #define encode_sequence_maxsz   0
 315 #define decode_sequence_maxsz   0
 316 #endif /* CONFIG_NFS_V4_1 */
 317
 318 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 319 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 320 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 321                                 encode_sequence_maxsz + \
 322                                 encode_putfh_maxsz + \
 323                                 encode_read_maxsz)
 324 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 325                                 decode_sequence_maxsz + \
 326                                 decode_putfh_maxsz + \
 327                                 decode_read_maxsz)
 328 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 329                                 encode_sequence_maxsz + \
 330                                 encode_putfh_maxsz + \
 331                                 encode_readlink_maxsz)
 332 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 333                                 decode_sequence_maxsz + \
 334                                 decode_putfh_maxsz + \
 335                                 decode_readlink_maxsz)
 336 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 337                                 encode_sequence_maxsz + \
 338                                 encode_putfh_maxsz + \
 339                                 encode_readdir_maxsz)
 340 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 341                                 decode_sequence_maxsz + \
 342                                 decode_putfh_maxsz + \
 343                                 decode_readdir_maxsz)
 344 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 345                                 encode_sequence_maxsz + \
 346                                 encode_putfh_maxsz + \
 347                                 encode_write_maxsz + \
 348                                 encode_getattr_maxsz)
 349 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 350                                 decode_sequence_maxsz + \
 351                                 decode_putfh_maxsz + \
 352                                 decode_write_maxsz + \
 353                                 decode_getattr_maxsz)
 354 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_commit_maxsz + \
 358                                 encode_getattr_maxsz)
 359 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 360                                 decode_sequence_maxsz + \
 361                                 decode_putfh_maxsz + \
 362                                 decode_commit_maxsz + \
 363                                 decode_getattr_maxsz)
 364 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 365                                 encode_sequence_maxsz + \
 366                                 encode_putfh_maxsz + \
 367                                 encode_savefh_maxsz + \
 368                                 encode_open_maxsz + \
 369                                 encode_getfh_maxsz + \
 370                                 encode_getattr_maxsz + \
 371                                 encode_restorefh_maxsz + \
 372                                 encode_getattr_maxsz)
 373 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 374                                 decode_sequence_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_savefh_maxsz + \
 377                                 decode_open_maxsz + \
 378                                 decode_getfh_maxsz + \
 379                                 decode_getattr_maxsz + \
 380                                 decode_restorefh_maxsz + \
 381                                 decode_getattr_maxsz)
 382 #define NFS4_enc_open_confirm_sz \
 383                                 (compound_encode_hdr_maxsz + \
 384                                  encode_putfh_maxsz + \
 385                                  encode_open_confirm_maxsz)
 386 #define NFS4_dec_open_confirm_sz \
 387                                 (compound_decode_hdr_maxsz + \
 388                                  decode_putfh_maxsz + \
 389                                  decode_open_confirm_maxsz)
 390 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 391                                         encode_sequence_maxsz + \
 392                                         encode_putfh_maxsz + \
 393                                         encode_open_maxsz + \
 394                                         encode_getattr_maxsz)
 395 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 396                                         decode_sequence_maxsz + \
 397                                         decode_putfh_maxsz + \
 398                                         decode_open_maxsz + \
 399                                         decode_getattr_maxsz)
 400 #define NFS4_enc_open_downgrade_sz \
 401                                 (compound_encode_hdr_maxsz + \
 402                                  encode_sequence_maxsz + \
 403                                  encode_putfh_maxsz + \
 404                                  encode_open_downgrade_maxsz + \
 405                                  encode_getattr_maxsz)
 406 #define NFS4_dec_open_downgrade_sz \
 407                                 (compound_decode_hdr_maxsz + \
 408                                  decode_sequence_maxsz + \
 409                                  decode_putfh_maxsz + \
 410                                  decode_open_downgrade_maxsz + \
 411                                  decode_getattr_maxsz)
 412 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 413                                  encode_sequence_maxsz + \
 414                                  encode_putfh_maxsz + \
 415                                  encode_close_maxsz + \
 416                                  encode_getattr_maxsz)
 417 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 418                                  decode_sequence_maxsz + \
 419                                  decode_putfh_maxsz + \
 420                                  decode_close_maxsz + \
 421                                  decode_getattr_maxsz)
 422 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 423                                  encode_sequence_maxsz + \
 424                                  encode_putfh_maxsz + \
 425                                  encode_setattr_maxsz + \
 426                                  encode_getattr_maxsz)
 427 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 428                                  decode_sequence_maxsz + \
 429                                  decode_putfh_maxsz + \
 430                                  decode_setattr_maxsz + \
 431                                  decode_getattr_maxsz)
 432 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 433                                 encode_sequence_maxsz + \
 434                                 encode_putfh_maxsz + \
 435                                 encode_fsinfo_maxsz)
 436 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 437                                 decode_sequence_maxsz + \
 438                                 decode_putfh_maxsz + \
 439                                 decode_fsinfo_maxsz)
 440 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 441                                 encode_renew_maxsz)
 442 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 443                                 decode_renew_maxsz)
 444 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 445                                 encode_setclientid_maxsz)
 446 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 447                                 decode_setclientid_maxsz)
 448 #define NFS4_enc_setclientid_confirm_sz \
 449                                 (compound_encode_hdr_maxsz + \
 450                                 encode_setclientid_confirm_maxsz + \
 451                                 encode_putrootfh_maxsz + \
 452                                 encode_fsinfo_maxsz)
 453 #define NFS4_dec_setclientid_confirm_sz \
 454                                 (compound_decode_hdr_maxsz + \
 455                                 decode_setclientid_confirm_maxsz + \
 456                                 decode_putrootfh_maxsz + \
 457                                 decode_fsinfo_maxsz)
 458 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 459                                 encode_sequence_maxsz + \
 460                                 encode_putfh_maxsz + \
 461                                 encode_lock_maxsz)
 462 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 463                                 decode_sequence_maxsz + \
 464                                 decode_putfh_maxsz + \
 465                                 decode_lock_maxsz)
 466 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 467                                 encode_sequence_maxsz + \
 468                                 encode_putfh_maxsz + \
 469                                 encode_lockt_maxsz)
 470 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 471                                  decode_sequence_maxsz + \
 472                                  decode_putfh_maxsz + \
 473                                  decode_lockt_maxsz)
 474 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 475                                 encode_sequence_maxsz + \
 476                                 encode_putfh_maxsz + \
 477                                 encode_locku_maxsz)
 478 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 479                                 decode_sequence_maxsz + \
 480                                 decode_putfh_maxsz + \
 481                                 decode_locku_maxsz)
 482 #define NFS4_enc_release_lockowner_sz \
 483                                 (compound_encode_hdr_maxsz + \
 484                                  encode_lockowner_maxsz)
 485 #define NFS4_dec_release_lockowner_sz \
 486                                 (compound_decode_hdr_maxsz + \
 487                                  decode_lockowner_maxsz)
 488 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_access_maxsz + \
 492                                 encode_getattr_maxsz)
 493 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 494                                 decode_sequence_maxsz + \
 495                                 decode_putfh_maxsz + \
 496                                 decode_access_maxsz + \
 497                                 decode_getattr_maxsz)
 498 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 499                                 encode_sequence_maxsz + \
 500                                 encode_putfh_maxsz + \
 501                                 encode_getattr_maxsz)
 502 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 503                                 decode_sequence_maxsz + \
 504                                 decode_putfh_maxsz + \
 505                                 decode_getattr_maxsz)
 506 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 507                                 encode_sequence_maxsz + \
 508                                 encode_putfh_maxsz + \
 509                                 encode_lookup_maxsz + \
 510                                 encode_getattr_maxsz + \
 511                                 encode_getfh_maxsz)
 512 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 513                                 decode_sequence_maxsz + \
 514                                 decode_putfh_maxsz + \
 515                                 decode_lookup_maxsz + \
 516                                 decode_getattr_maxsz + \
 517                                 decode_getfh_maxsz)
 518 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 519                                 encode_sequence_maxsz + \
 520                                 encode_putrootfh_maxsz + \
 521                                 encode_getattr_maxsz + \
 522                                 encode_getfh_maxsz)
 523 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 524                                 decode_sequence_maxsz + \
 525                                 decode_putrootfh_maxsz + \
 526                                 decode_getattr_maxsz + \
 527                                 decode_getfh_maxsz)
 528 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 529                                 encode_sequence_maxsz + \
 530                                 encode_putfh_maxsz + \
 531                                 encode_remove_maxsz + \
 532                                 encode_getattr_maxsz)
 533 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_remove_maxsz + \
 537                                 decode_getattr_maxsz)
 538 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 539                                 encode_sequence_maxsz + \
 540                                 encode_putfh_maxsz + \
 541                                 encode_savefh_maxsz + \
 542                                 encode_putfh_maxsz + \
 543                                 encode_rename_maxsz + \
 544                                 encode_getattr_maxsz + \
 545                                 encode_restorefh_maxsz + \
 546                                 encode_getattr_maxsz)
 547 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 548                                 decode_sequence_maxsz + \
 549                                 decode_putfh_maxsz + \
 550                                 decode_savefh_maxsz + \
 551                                 decode_putfh_maxsz + \
 552                                 decode_rename_maxsz + \
 553                                 decode_getattr_maxsz + \
 554                                 decode_restorefh_maxsz + \
 555                                 decode_getattr_maxsz)
 556 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 557                                 encode_sequence_maxsz + \
 558                                 encode_putfh_maxsz + \
 559                                 encode_savefh_maxsz + \
 560                                 encode_putfh_maxsz + \
 561                                 encode_link_maxsz + \
 562                                 decode_getattr_maxsz + \
 563                                 encode_restorefh_maxsz + \
 564                                 decode_getattr_maxsz)
 565 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 566                                 decode_sequence_maxsz + \
 567                                 decode_putfh_maxsz + \
 568                                 decode_savefh_maxsz + \
 569                                 decode_putfh_maxsz + \
 570                                 decode_link_maxsz + \
 571                                 decode_getattr_maxsz + \
 572                                 decode_restorefh_maxsz + \
 573                                 decode_getattr_maxsz)
 574 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 575                                 encode_sequence_maxsz + \
 576                                 encode_putfh_maxsz + \
 577                                 encode_symlink_maxsz + \
 578                                 encode_getattr_maxsz + \
 579                                 encode_getfh_maxsz)
 580 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 581                                 decode_sequence_maxsz + \
 582                                 decode_putfh_maxsz + \
 583                                 decode_symlink_maxsz + \
 584                                 decode_getattr_maxsz + \
 585                                 decode_getfh_maxsz)
 586 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 587                                 encode_sequence_maxsz + \
 588                                 encode_putfh_maxsz + \
 589                                 encode_savefh_maxsz + \
 590                                 encode_create_maxsz + \
 591                                 encode_getfh_maxsz + \
 592                                 encode_getattr_maxsz + \
 593                                 encode_restorefh_maxsz + \
 594                                 encode_getattr_maxsz)
 595 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 596                                 decode_sequence_maxsz + \
 597                                 decode_putfh_maxsz + \
 598                                 decode_savefh_maxsz + \
 599                                 decode_create_maxsz + \
 600                                 decode_getfh_maxsz + \
 601                                 decode_getattr_maxsz + \
 602                                 decode_restorefh_maxsz + \
 603                                 decode_getattr_maxsz)
 604 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 605                                 encode_sequence_maxsz + \
 606                                 encode_putfh_maxsz + \
 607                                 encode_getattr_maxsz)
 608 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 609                                 decode_sequence_maxsz + \
 610                                 decode_putfh_maxsz + \
 611                                 decode_getattr_maxsz)
 612 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_statfs_maxsz)
 616 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 617                                 decode_sequence_maxsz + \
 618                                 decode_putfh_maxsz + \
 619                                 decode_statfs_maxsz)
 620 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 621                                 encode_sequence_maxsz + \
 622                                 encode_putfh_maxsz + \
 623                                 encode_getattr_maxsz)
 624 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_getattr_maxsz)
 628 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 629                                 encode_sequence_maxsz + \
 630                                 encode_putfh_maxsz + \
 631                                 encode_delegreturn_maxsz + \
 632                                 encode_getattr_maxsz)
 633 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 634                                 decode_sequence_maxsz + \
 635                                 decode_delegreturn_maxsz + \
 636                                 decode_getattr_maxsz)
 637 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 638                                 encode_sequence_maxsz + \
 639                                 encode_putfh_maxsz + \
 640                                 encode_getacl_maxsz)
 641 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 642                                 decode_sequence_maxsz + \
 643                                 decode_putfh_maxsz + \
 644                                 decode_getacl_maxsz)
 645 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 646                                 encode_sequence_maxsz + \
 647                                 encode_putfh_maxsz + \
 648                                 encode_setacl_maxsz)
 649 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 650                                 decode_sequence_maxsz + \
 651                                 decode_putfh_maxsz + \
 652                                 decode_setacl_maxsz)
 653 #define NFS4_enc_fs_locations_sz \
 654                                 (compound_encode_hdr_maxsz + \
 655                                  encode_sequence_maxsz + \
 656                                  encode_putfh_maxsz + \
 657                                  encode_lookup_maxsz + \
 658                                  encode_fs_locations_maxsz)
 659 #define NFS4_dec_fs_locations_sz \
 660                                 (compound_decode_hdr_maxsz + \
 661                                  decode_sequence_maxsz + \
 662                                  decode_putfh_maxsz + \
 663                                  decode_lookup_maxsz + \
 664                                  decode_fs_locations_maxsz)
 665 #if defined(CONFIG_NFS_V4_1)
 666 #define NFS4_enc_exchange_id_sz \
 667                                 (compound_encode_hdr_maxsz + \
 668                                  encode_exchange_id_maxsz)
 669 #define NFS4_dec_exchange_id_sz \
 670                                 (compound_decode_hdr_maxsz + \
 671                                  decode_exchange_id_maxsz)
 672 #define NFS4_enc_create_session_sz \
 673                                 (compound_encode_hdr_maxsz + \
 674                                  encode_create_session_maxsz)
 675 #define NFS4_dec_create_session_sz \
 676                                 (compound_decode_hdr_maxsz + \
 677                                  decode_create_session_maxsz)
 678 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 679                                          encode_destroy_session_maxsz)
 680 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 681                                          decode_destroy_session_maxsz)
 682 #define NFS4_enc_sequence_sz \
 683                                 (compound_decode_hdr_maxsz + \
 684                                  encode_sequence_maxsz)
 685 #define NFS4_dec_sequence_sz \
 686                                 (compound_decode_hdr_maxsz + \
 687                                  decode_sequence_maxsz)
 688 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 689                                          encode_sequence_maxsz + \
 690                                          encode_putrootfh_maxsz + \
 691                                          encode_fsinfo_maxsz)
 692 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 693                                          decode_sequence_maxsz + \
 694                                          decode_putrootfh_maxsz + \
 695                                          decode_fsinfo_maxsz)
 696 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 697                                          encode_sequence_maxsz + \
 698                                          encode_reclaim_complete_maxsz)
 699 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 700                                          decode_sequence_maxsz + \
 701                                          decode_reclaim_complete_maxsz)
 702
 703 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 704                                       compound_encode_hdr_maxsz +
 705                                       encode_sequence_maxsz +
 706                                       encode_putfh_maxsz +
 707                                       encode_getattr_maxsz) *
 708                                      XDR_UNIT);
 709
 710 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 711                                      compound_decode_hdr_maxsz +
 712                                      decode_sequence_maxsz +
 713                                      decode_putfh_maxsz) *
 714                                     XDR_UNIT);
 715 #endif /* CONFIG_NFS_V4_1 */
 716
 717 static const umode_t nfs_type2fmt[] = {
 718         [NF4BAD] = 0,
 719         [NF4REG] = S_IFREG,
 720         [NF4DIR] = S_IFDIR,
 721         [NF4BLK] = S_IFBLK,
 722         [NF4CHR] = S_IFCHR,
 723         [NF4LNK] = S_IFLNK,
 724         [NF4SOCK] = S_IFSOCK,
 725         [NF4FIFO] = S_IFIFO,
 726         [NF4ATTRDIR] = 0,
 727         [NF4NAMEDATTR] = 0,
 728 };
 729
 730 struct compound_hdr {
 731         int32_t         status;
 732         uint32_t        nops;
 733         __be32 *        nops_p;
 734         uint32_t        taglen;
 735         char *          tag;
 736         uint32_t        replen;         /* expected reply words */
 737         u32             minorversion;
 738 };
 739
 740 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 741 {
 742         __be32 *p = xdr_reserve_space(xdr, nbytes);
 743         BUG_ON(!p);
 744         return p;
 745 }
 746
 747 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 748 {
 749         __be32 *p;
 750
 751         p = xdr_reserve_space(xdr, 4 + len);
 752         BUG_ON(p == NULL);
 753         xdr_encode_opaque(p, str, len);
 754 }
 755
 756 static void encode_compound_hdr(struct xdr_stream *xdr,
 757                                 struct rpc_rqst *req,
 758                                 struct compound_hdr *hdr)
 759 {
 760         __be32 *p;
 761         struct rpc_auth *auth = req->rq_cred->cr_auth;
 762
 763         /* initialize running count of expected bytes in reply.
 764          * NOTE: the replied tag SHOULD be the same is the one sent,
 765          * but this is not required as a MUST for the server to do so. */
 766         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 767
 768         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 769         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 770         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 771         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 772         *p++ = cpu_to_be32(hdr->minorversion);
 773         hdr->nops_p = p;
 774         *p = cpu_to_be32(hdr->nops);
 775 }
 776
 777 static void encode_nops(struct compound_hdr *hdr)
 778 {
 779         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 780         *hdr->nops_p = htonl(hdr->nops);
 781 }
 782
 783 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 784 {
 785         __be32 *p;
 786
 787         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 788         BUG_ON(p == NULL);
 789         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 790 }
 791
 792 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 793 {
 794         char owner_name[IDMAP_NAMESZ];
 795         char owner_group[IDMAP_NAMESZ];
 796         int owner_namelen = 0;
 797         int owner_grouplen = 0;
 798         __be32 *p;
 799         __be32 *q;
 800         int len;
 801         uint32_t bmval0 = 0;
 802         uint32_t bmval1 = 0;
 803
 804         /*
 805          * We reserve enough space to write the entire attribute buffer at once.
 806          * In the worst-case, this would be
 807          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 808          *          = 36 bytes, plus any contribution from variable-length fields
 809          *            such as owner/group.
 810          */
 811         len = 16;
 812
 813         /* Sigh */
 814         if (iap->ia_valid & ATTR_SIZE)
 815                 len += 8;
 816         if (iap->ia_valid & ATTR_MODE)
 817                 len += 4;
 818         if (iap->ia_valid & ATTR_UID) {
 819                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 820                 if (owner_namelen < 0) {
 821                         dprintk("nfs: couldn't resolve uid %d to string\n",
 822                                         iap->ia_uid);
 823                         /* XXX */
 824                         strcpy(owner_name, "nobody");
 825                         owner_namelen = sizeof("nobody") - 1;
 826                         /* goto out; */
 827                 }
 828                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 829         }
 830         if (iap->ia_valid & ATTR_GID) {
 831                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 832                 if (owner_grouplen < 0) {
 833                         dprintk("nfs: couldn't resolve gid %d to string\n",
 834                                         iap->ia_gid);
 835                         strcpy(owner_group, "nobody");
 836                         owner_grouplen = sizeof("nobody") - 1;
 837                         /* goto out; */
 838                 }
 839                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 840         }
 841         if (iap->ia_valid & ATTR_ATIME_SET)
 842                 len += 16;
 843         else if (iap->ia_valid & ATTR_ATIME)
 844                 len += 4;
 845         if (iap->ia_valid & ATTR_MTIME_SET)
 846                 len += 16;
 847         else if (iap->ia_valid & ATTR_MTIME)
 848                 len += 4;
 849         p = reserve_space(xdr, len);
 850
 851         /*
 852          * We write the bitmap length now, but leave the bitmap and the attribute
 853          * buffer length to be backfilled at the end of this routine.
 854          */
 855         *p++ = cpu_to_be32(2);
 856         q = p;
 857         p += 3;
 858
 859         if (iap->ia_valid & ATTR_SIZE) {
 860                 bmval0 |= FATTR4_WORD0_SIZE;
 861                 p = xdr_encode_hyper(p, iap->ia_size);
 862         }
 863         if (iap->ia_valid & ATTR_MODE) {
 864                 bmval1 |= FATTR4_WORD1_MODE;
 865                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 866         }
 867         if (iap->ia_valid & ATTR_UID) {
 868                 bmval1 |= FATTR4_WORD1_OWNER;
 869                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 870         }
 871         if (iap->ia_valid & ATTR_GID) {
 872                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 873                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 874         }
 875         if (iap->ia_valid & ATTR_ATIME_SET) {
 876                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 877                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 878                 *p++ = cpu_to_be32(0);
 879                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 880                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 881         }
 882         else if (iap->ia_valid & ATTR_ATIME) {
 883                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 884                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 885         }
 886         if (iap->ia_valid & ATTR_MTIME_SET) {
 887                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 888                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 889                 *p++ = cpu_to_be32(0);
 890                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 891                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 892         }
 893         else if (iap->ia_valid & ATTR_MTIME) {
 894                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 895                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 896         }
 897
 898         /*
 899          * Now we backfill the bitmap and the attribute buffer length.
 900          */
 901         if (len != ((char *)p - (char *)q) + 4) {
 902                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 903                                 len, ((char *)p - (char *)q) + 4);
 904                 BUG();
 905         }
 906         len = (char *)p - (char *)q - 12;
 907         *q++ = htonl(bmval0);
 908         *q++ = htonl(bmval1);
 909         *q = htonl(len);
 910
 911 /* out: */
 912 }
 913
 914 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 915 {
 916         __be32 *p;
 917
 918         p = reserve_space(xdr, 8);
 919         *p++ = cpu_to_be32(OP_ACCESS);
 920         *p = cpu_to_be32(access);
 921         hdr->nops++;
 922         hdr->replen += decode_access_maxsz;
 923 }
 924
 925 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 926 {
 927         __be32 *p;
 928
 929         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 930         *p++ = cpu_to_be32(OP_CLOSE);
 931         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 932         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 933         hdr->nops++;
 934         hdr->replen += decode_close_maxsz;
 935 }
 936
 937 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 938 {
 939         __be32 *p;
 940
 941         p = reserve_space(xdr, 16);
 942         *p++ = cpu_to_be32(OP_COMMIT);
 943         p = xdr_encode_hyper(p, args->offset);
 944         *p = cpu_to_be32(args->count);
 945         hdr->nops++;
 946         hdr->replen += decode_commit_maxsz;
 947 }
 948
 949 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 950 {
 951         __be32 *p;
 952
 953         p = reserve_space(xdr, 8);
 954         *p++ = cpu_to_be32(OP_CREATE);
 955         *p = cpu_to_be32(create->ftype);
 956
 957         switch (create->ftype) {
 958         case NF4LNK:
 959                 p = reserve_space(xdr, 4);
 960                 *p = cpu_to_be32(create->u.symlink.len);
 961                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 962                 break;
 963
 964         case NF4BLK: case NF4CHR:
 965                 p = reserve_space(xdr, 8);
 966                 *p++ = cpu_to_be32(create->u.device.specdata1);
 967                 *p = cpu_to_be32(create->u.device.specdata2);
 968                 break;
 969
 970         default:
 971                 break;
 972         }
 973
 974         encode_string(xdr, create->name->len, create->name->name);
 975         hdr->nops++;
 976         hdr->replen += decode_create_maxsz;
 977
 978         encode_attrs(xdr, create->attrs, create->server);
 979 }
 980
 981 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 982 {
 983         __be32 *p;
 984
 985         p = reserve_space(xdr, 12);
 986         *p++ = cpu_to_be32(OP_GETATTR);
 987         *p++ = cpu_to_be32(1);
 988         *p = cpu_to_be32(bitmap);
 989         hdr->nops++;
 990         hdr->replen += decode_getattr_maxsz;
 991 }
 992
 993 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 994 {
 995         __be32 *p;
 996
 997         p = reserve_space(xdr, 16);
 998         *p++ = cpu_to_be32(OP_GETATTR);
 999         *p++ = cpu_to_be32(2);
1000         *p++ = cpu_to_be32(bm0);
1001         *p = cpu_to_be32(bm1);
1002         hdr->nops++;
1003         hdr->replen += decode_getattr_maxsz;
1004 }
1005
1006 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1007 {
1008         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1009                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1010 }
1011
1012 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1013 {
1014         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1015                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1016 }
1017
1018 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1019 {
1020         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1021                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1022 }
1023
1024 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1025 {
1026         __be32 *p;
1027
1028         p = reserve_space(xdr, 4);
1029         *p = cpu_to_be32(OP_GETFH);
1030         hdr->nops++;
1031         hdr->replen += decode_getfh_maxsz;
1032 }
1033
1034 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1035 {
1036         __be32 *p;
1037
1038         p = reserve_space(xdr, 8 + name->len);
1039         *p++ = cpu_to_be32(OP_LINK);
1040         xdr_encode_opaque(p, name->name, name->len);
1041         hdr->nops++;
1042         hdr->replen += decode_link_maxsz;
1043 }
1044
1045 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1046 {
1047         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1048                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1049         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1050 }
1051
1052 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1053 {
1054         if (fl->fl_end == OFFSET_MAX)
1055                 return ~(uint64_t)0;
1056         return fl->fl_end - fl->fl_start + 1;
1057 }
1058
1059 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1060 {
1061         __be32 *p;
1062
1063         p = reserve_space(xdr, 28);
1064         p = xdr_encode_hyper(p, lowner->clientid);
1065         *p++ = cpu_to_be32(16);
1066         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1067         xdr_encode_hyper(p, lowner->id);
1068 }
1069
1070 /*
1071  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1072  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1073  */
1074 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1075 {
1076         __be32 *p;
1077
1078         p = reserve_space(xdr, 32);
1079         *p++ = cpu_to_be32(OP_LOCK);
1080         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1081         *p++ = cpu_to_be32(args->reclaim);
1082         p = xdr_encode_hyper(p, args->fl->fl_start);
1083         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1084         *p = cpu_to_be32(args->new_lock_owner);
1085         if (args->new_lock_owner){
1086                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1087                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1088                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1089                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1090                 encode_lockowner(xdr, &args->lock_owner);
1091         }
1092         else {
1093                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1094                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1095                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1096         }
1097         hdr->nops++;
1098         hdr->replen += decode_lock_maxsz;
1099 }
1100
1101 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1102 {
1103         __be32 *p;
1104
1105         p = reserve_space(xdr, 24);
1106         *p++ = cpu_to_be32(OP_LOCKT);
1107         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1108         p = xdr_encode_hyper(p, args->fl->fl_start);
1109         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1110         encode_lockowner(xdr, &args->lock_owner);
1111         hdr->nops++;
1112         hdr->replen += decode_lockt_maxsz;
1113 }
1114
1115 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1116 {
1117         __be32 *p;
1118
1119         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1120         *p++ = cpu_to_be32(OP_LOCKU);
1121         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1122         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1123         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1124         p = xdr_encode_hyper(p, args->fl->fl_start);
1125         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1126         hdr->nops++;
1127         hdr->replen += decode_locku_maxsz;
1128 }
1129
1130 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1131 {
1132         __be32 *p;
1133
1134         p = reserve_space(xdr, 4);
1135         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1136         encode_lockowner(xdr, lowner);
1137         hdr->nops++;
1138         hdr->replen += decode_release_lockowner_maxsz;
1139 }
1140
1141 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1142 {
1143         int len = name->len;
1144         __be32 *p;
1145
1146         p = reserve_space(xdr, 8 + len);
1147         *p++ = cpu_to_be32(OP_LOOKUP);
1148         xdr_encode_opaque(p, name->name, len);
1149         hdr->nops++;
1150         hdr->replen += decode_lookup_maxsz;
1151 }
1152
1153 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1154 {
1155         __be32 *p;
1156
1157         p = reserve_space(xdr, 8);
1158         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1159         case FMODE_READ:
1160                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1161                 break;
1162         case FMODE_WRITE:
1163                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1164                 break;
1165         case FMODE_READ|FMODE_WRITE:
1166                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1167                 break;
1168         default:
1169                 *p++ = cpu_to_be32(0);
1170         }
1171         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1172 }
1173
1174 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1175 {
1176         __be32 *p;
1177  /*
1178  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1179  * owner 4 = 32
1180  */
1181         p = reserve_space(xdr, 8);
1182         *p++ = cpu_to_be32(OP_OPEN);
1183         *p = cpu_to_be32(arg->seqid->sequence->counter);
1184         encode_share_access(xdr, arg->fmode);
1185         p = reserve_space(xdr, 28);
1186         p = xdr_encode_hyper(p, arg->clientid);
1187         *p++ = cpu_to_be32(16);
1188         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1189         xdr_encode_hyper(p, arg->id);
1190 }
1191
1192 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1193 {
1194         __be32 *p;
1195         struct nfs_client *clp;
1196
1197         p = reserve_space(xdr, 4);
1198         switch(arg->open_flags & O_EXCL) {
1199         case 0:
1200                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1201                 encode_attrs(xdr, arg->u.attrs, arg->server);
1202                 break;
1203         default:
1204                 clp = arg->server->nfs_client;
1205                 if (clp->cl_mvops->minor_version > 0) {
1206                         if (nfs4_has_persistent_session(clp)) {
1207                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1208                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1209                         } else {
1210                                 struct iattr dummy;
1211
1212                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1213                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1214                                 dummy.ia_valid = 0;
1215                                 encode_attrs(xdr, &dummy, arg->server);
1216                         }
1217                 } else {
1218                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1219                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1220                 }
1221         }
1222 }
1223
1224 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1225 {
1226         __be32 *p;
1227
1228         p = reserve_space(xdr, 4);
1229         switch (arg->open_flags & O_CREAT) {
1230         case 0:
1231                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1232                 break;
1233         default:
1234                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1235                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1236                 encode_createmode(xdr, arg);
1237         }
1238 }
1239
1240 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1241 {
1242         __be32 *p;
1243
1244         p = reserve_space(xdr, 4);
1245         switch (delegation_type) {
1246         case 0:
1247                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1248                 break;
1249         case FMODE_READ:
1250                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1251                 break;
1252         case FMODE_WRITE|FMODE_READ:
1253                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1254                 break;
1255         default:
1256                 BUG();
1257         }
1258 }
1259
1260 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1261 {
1262         __be32 *p;
1263
1264         p = reserve_space(xdr, 4);
1265         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1266         encode_string(xdr, name->len, name->name);
1267 }
1268
1269 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1270 {
1271         __be32 *p;
1272
1273         p = reserve_space(xdr, 4);
1274         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1275         encode_delegation_type(xdr, type);
1276 }
1277
1278 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1279 {
1280         __be32 *p;
1281
1282         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1283         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1284         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1285         encode_string(xdr, name->len, name->name);
1286 }
1287
1288 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1289 {
1290         encode_openhdr(xdr, arg);
1291         encode_opentype(xdr, arg);
1292         switch (arg->claim) {
1293         case NFS4_OPEN_CLAIM_NULL:
1294                 encode_claim_null(xdr, arg->name);
1295                 break;
1296         case NFS4_OPEN_CLAIM_PREVIOUS:
1297                 encode_claim_previous(xdr, arg->u.delegation_type);
1298                 break;
1299         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1300                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1301                 break;
1302         default:
1303                 BUG();
1304         }
1305         hdr->nops++;
1306         hdr->replen += decode_open_maxsz;
1307 }
1308
1309 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1310 {
1311         __be32 *p;
1312
1313         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1314         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1315         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1316         *p = cpu_to_be32(arg->seqid->sequence->counter);
1317         hdr->nops++;
1318         hdr->replen += decode_open_confirm_maxsz;
1319 }
1320
1321 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1322 {
1323         __be32 *p;
1324
1325         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1326         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1327         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1328         *p = cpu_to_be32(arg->seqid->sequence->counter);
1329         encode_share_access(xdr, arg->fmode);
1330         hdr->nops++;
1331         hdr->replen += decode_open_downgrade_maxsz;
1332 }
1333
1334 static void
1335 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1336 {
1337         int len = fh->size;
1338         __be32 *p;
1339
1340         p = reserve_space(xdr, 8 + len);
1341         *p++ = cpu_to_be32(OP_PUTFH);
1342         xdr_encode_opaque(p, fh->data, len);
1343         hdr->nops++;
1344         hdr->replen += decode_putfh_maxsz;
1345 }
1346
1347 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1348 {
1349         __be32 *p;
1350
1351         p = reserve_space(xdr, 4);
1352         *p = cpu_to_be32(OP_PUTROOTFH);
1353         hdr->nops++;
1354         hdr->replen += decode_putrootfh_maxsz;
1355 }
1356
1357 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1358 {
1359         nfs4_stateid stateid;
1360         __be32 *p;
1361
1362         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1363         if (ctx->state != NULL) {
1364                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1365                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1366         } else
1367                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1368 }
1369
1370 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1371 {
1372         __be32 *p;
1373
1374         p = reserve_space(xdr, 4);
1375         *p = cpu_to_be32(OP_READ);
1376
1377         encode_stateid(xdr, args->context, args->lock_context);
1378
1379         p = reserve_space(xdr, 12);
1380         p = xdr_encode_hyper(p, args->offset);
1381         *p = cpu_to_be32(args->count);
1382         hdr->nops++;
1383         hdr->replen += decode_read_maxsz;
1384 }
1385
1386 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1387 {
1388         uint32_t attrs[2] = {0, 0};
1389         uint32_t dircount = readdir->count >> 1;
1390         __be32 *p;
1391
1392         if (readdir->plus) {
1393                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1394                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1395                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1396                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1397                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1398                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1399                 dircount >>= 1;
1400         }
1401         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1402         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1403         /* Switch to mounted_on_fileid if the server supports it */
1404         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1405                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1406         else
1407                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1408
1409         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1410         *p++ = cpu_to_be32(OP_READDIR);
1411         p = xdr_encode_hyper(p, readdir->cookie);
1412         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1413         *p++ = cpu_to_be32(dircount);
1414         *p++ = cpu_to_be32(readdir->count);
1415         *p++ = cpu_to_be32(2);
1416
1417         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1418         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1419         hdr->nops++;
1420         hdr->replen += decode_readdir_maxsz;
1421         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1422                         __func__,
1423                         (unsigned long long)readdir->cookie,
1424                         ((u32 *)readdir->verifier.data)[0],
1425                         ((u32 *)readdir->verifier.data)[1],
1426                         attrs[0] & readdir->bitmask[0],
1427                         attrs[1] & readdir->bitmask[1]);
1428 }
1429
1430 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1431 {
1432         __be32 *p;
1433
1434         p = reserve_space(xdr, 4);
1435         *p = cpu_to_be32(OP_READLINK);
1436         hdr->nops++;
1437         hdr->replen += decode_readlink_maxsz;
1438 }
1439
1440 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1441 {
1442         __be32 *p;
1443
1444         p = reserve_space(xdr, 8 + name->len);
1445         *p++ = cpu_to_be32(OP_REMOVE);
1446         xdr_encode_opaque(p, name->name, name->len);
1447         hdr->nops++;
1448         hdr->replen += decode_remove_maxsz;
1449 }
1450
1451 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1452 {
1453         __be32 *p;
1454
1455         p = reserve_space(xdr, 4);
1456         *p = cpu_to_be32(OP_RENAME);
1457         encode_string(xdr, oldname->len, oldname->name);
1458         encode_string(xdr, newname->len, newname->name);
1459         hdr->nops++;
1460         hdr->replen += decode_rename_maxsz;
1461 }
1462
1463 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1464 {
1465         __be32 *p;
1466
1467         p = reserve_space(xdr, 12);
1468         *p++ = cpu_to_be32(OP_RENEW);
1469         xdr_encode_hyper(p, client_stateid->cl_clientid);
1470         hdr->nops++;
1471         hdr->replen += decode_renew_maxsz;
1472 }
1473
1474 static void
1475 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1476 {
1477         __be32 *p;
1478
1479         p = reserve_space(xdr, 4);
1480         *p = cpu_to_be32(OP_RESTOREFH);
1481         hdr->nops++;
1482         hdr->replen += decode_restorefh_maxsz;
1483 }
1484
1485 static int
1486 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1491         *p++ = cpu_to_be32(OP_SETATTR);
1492         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1493         p = reserve_space(xdr, 2*4);
1494         *p++ = cpu_to_be32(1);
1495         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1496         if (arg->acl_len % 4)
1497                 return -EINVAL;
1498         p = reserve_space(xdr, 4);
1499         *p = cpu_to_be32(arg->acl_len);
1500         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1501         hdr->nops++;
1502         hdr->replen += decode_setacl_maxsz;
1503         return 0;
1504 }
1505
1506 static void
1507 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(OP_SAVEFH);
1513         hdr->nops++;
1514         hdr->replen += decode_savefh_maxsz;
1515 }
1516
1517 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1518 {
1519         __be32 *p;
1520
1521         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1522         *p++ = cpu_to_be32(OP_SETATTR);
1523         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1524         hdr->nops++;
1525         hdr->replen += decode_setattr_maxsz;
1526         encode_attrs(xdr, arg->iap, server);
1527 }
1528
1529 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1530 {
1531         __be32 *p;
1532
1533         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1534         *p++ = cpu_to_be32(OP_SETCLIENTID);
1535         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1536
1537         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1538         p = reserve_space(xdr, 4);
1539         *p = cpu_to_be32(setclientid->sc_prog);
1540         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1541         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1542         p = reserve_space(xdr, 4);
1543         *p = cpu_to_be32(setclientid->sc_cb_ident);
1544         hdr->nops++;
1545         hdr->replen += decode_setclientid_maxsz;
1546 }
1547
1548 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1549 {
1550         __be32 *p;
1551
1552         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1553         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1554         p = xdr_encode_hyper(p, arg->clientid);
1555         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1556         hdr->nops++;
1557         hdr->replen += decode_setclientid_confirm_maxsz;
1558 }
1559
1560 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1561 {
1562         __be32 *p;
1563
1564         p = reserve_space(xdr, 4);
1565         *p = cpu_to_be32(OP_WRITE);
1566
1567         encode_stateid(xdr, args->context, args->lock_context);
1568
1569         p = reserve_space(xdr, 16);
1570         p = xdr_encode_hyper(p, args->offset);
1571         *p++ = cpu_to_be32(args->stable);
1572         *p = cpu_to_be32(args->count);
1573
1574         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1575         hdr->nops++;
1576         hdr->replen += decode_write_maxsz;
1577 }
1578
1579 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1580 {
1581         __be32 *p;
1582
1583         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1584
1585         *p++ = cpu_to_be32(OP_DELEGRETURN);
1586         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1587         hdr->nops++;
1588         hdr->replen += decode_delegreturn_maxsz;
1589 }
1590
1591 #if defined(CONFIG_NFS_V4_1)
1592 /* NFSv4.1 operations */
1593 static void encode_exchange_id(struct xdr_stream *xdr,
1594                                struct nfs41_exchange_id_args *args,
1595                                struct compound_hdr *hdr)
1596 {
1597         __be32 *p;
1598
1599         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1600         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1601         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1602
1603         encode_string(xdr, args->id_len, args->id);
1604
1605         p = reserve_space(xdr, 12);
1606         *p++ = cpu_to_be32(args->flags);
1607         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1608         *p = cpu_to_be32(0);    /* zero length implementation id array */
1609         hdr->nops++;
1610         hdr->replen += decode_exchange_id_maxsz;
1611 }
1612
1613 static void encode_create_session(struct xdr_stream *xdr,
1614                                   struct nfs41_create_session_args *args,
1615                                   struct compound_hdr *hdr)
1616 {
1617         __be32 *p;
1618         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1619         uint32_t len;
1620         struct nfs_client *clp = args->client;
1621         u32 max_resp_sz_cached;
1622
1623         /*
1624          * Assumes OPEN is the biggest non-idempotent compound.
1625          * 2 is the verifier.
1626          */
1627         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1628                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1629
1630         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1631                         clp->cl_ipaddr);
1632
1633         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1634         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1635         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1636         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1637         *p++ = cpu_to_be32(args->flags);                        /*flags */
1638
1639         /* Fore Channel */
1640         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1641         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1642         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1643         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1644         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1645         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1646         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1647
1648         /* Back Channel */
1649         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1650         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1651         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1652         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1653         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1654         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1655         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1656
1657         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1658         *p++ = cpu_to_be32(1);
1659         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1660
1661         /* authsys_parms rfc1831 */
1662         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1663         p = xdr_encode_opaque(p, machine_name, len);
1664         *p++ = cpu_to_be32(0);                          /* UID */
1665         *p++ = cpu_to_be32(0);                          /* GID */
1666         *p = cpu_to_be32(0);                            /* No more gids */
1667         hdr->nops++;
1668         hdr->replen += decode_create_session_maxsz;
1669 }
1670
1671 static void encode_destroy_session(struct xdr_stream *xdr,
1672                                    struct nfs4_session *session,
1673                                    struct compound_hdr *hdr)
1674 {
1675         __be32 *p;
1676         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1677         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1678         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1679         hdr->nops++;
1680         hdr->replen += decode_destroy_session_maxsz;
1681 }
1682
1683 static void encode_reclaim_complete(struct xdr_stream *xdr,
1684                                     struct nfs41_reclaim_complete_args *args,
1685                                     struct compound_hdr *hdr)
1686 {
1687         __be32 *p;
1688
1689         p = reserve_space(xdr, 8);
1690         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1691         *p++ = cpu_to_be32(args->one_fs);
1692         hdr->nops++;
1693         hdr->replen += decode_reclaim_complete_maxsz;
1694 }
1695 #endif /* CONFIG_NFS_V4_1 */
1696
1697 static void encode_sequence(struct xdr_stream *xdr,
1698                             const struct nfs4_sequence_args *args,
1699                             struct compound_hdr *hdr)
1700 {
1701 #if defined(CONFIG_NFS_V4_1)
1702         struct nfs4_session *session = args->sa_session;
1703         struct nfs4_slot_table *tp;
1704         struct nfs4_slot *slot;
1705         __be32 *p;
1706
1707         if (!session)
1708                 return;
1709
1710         tp = &session->fc_slot_table;
1711
1712         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1713         slot = tp->slots + args->sa_slotid;
1714
1715         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1716         *p++ = cpu_to_be32(OP_SEQUENCE);
1717
1718         /*
1719          * Sessionid + seqid + slotid + max slotid + cache_this
1720          */
1721         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1722                 "max_slotid=%d cache_this=%d\n",
1723                 __func__,
1724                 ((u32 *)session->sess_id.data)[0],
1725                 ((u32 *)session->sess_id.data)[1],
1726                 ((u32 *)session->sess_id.data)[2],
1727                 ((u32 *)session->sess_id.data)[3],
1728                 slot->seq_nr, args->sa_slotid,
1729                 tp->highest_used_slotid, args->sa_cache_this);
1730         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1731         *p++ = cpu_to_be32(slot->seq_nr);
1732         *p++ = cpu_to_be32(args->sa_slotid);
1733         *p++ = cpu_to_be32(tp->highest_used_slotid);
1734         *p = cpu_to_be32(args->sa_cache_this);
1735         hdr->nops++;
1736         hdr->replen += decode_sequence_maxsz;
1737 #endif /* CONFIG_NFS_V4_1 */
1738 }
1739
1740 /*
1741  * END OF "GENERIC" ENCODE ROUTINES.
1742  */
1743
1744 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1745 {
1746 #if defined(CONFIG_NFS_V4_1)
1747         if (args->sa_session)
1748                 return args->sa_session->clp->cl_mvops->minor_version;
1749 #endif /* CONFIG_NFS_V4_1 */
1750         return 0;
1751 }
1752
1753 /*
1754  * Encode an ACCESS request
1755  */
1756 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1757 {
1758         struct xdr_stream xdr;
1759         struct compound_hdr hdr = {
1760                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1761         };
1762
1763         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1764         encode_compound_hdr(&xdr, req, &hdr);
1765         encode_sequence(&xdr, &args->seq_args, &hdr);
1766         encode_putfh(&xdr, args->fh, &hdr);
1767         encode_access(&xdr, args->access, &hdr);
1768         encode_getfattr(&xdr, args->bitmask, &hdr);
1769         encode_nops(&hdr);
1770         return 0;
1771 }
1772
1773 /*
1774  * Encode LOOKUP request
1775  */
1776 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1777 {
1778         struct xdr_stream xdr;
1779         struct compound_hdr hdr = {
1780                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1781         };
1782
1783         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1784         encode_compound_hdr(&xdr, req, &hdr);
1785         encode_sequence(&xdr, &args->seq_args, &hdr);
1786         encode_putfh(&xdr, args->dir_fh, &hdr);
1787         encode_lookup(&xdr, args->name, &hdr);
1788         encode_getfh(&xdr, &hdr);
1789         encode_getfattr(&xdr, args->bitmask, &hdr);
1790         encode_nops(&hdr);
1791         return 0;
1792 }
1793
1794 /*
1795  * Encode LOOKUP_ROOT request
1796  */
1797 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1798 {
1799         struct xdr_stream xdr;
1800         struct compound_hdr hdr = {
1801                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1802         };
1803
1804         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1805         encode_compound_hdr(&xdr, req, &hdr);
1806         encode_sequence(&xdr, &args->seq_args, &hdr);
1807         encode_putrootfh(&xdr, &hdr);
1808         encode_getfh(&xdr, &hdr);
1809         encode_getfattr(&xdr, args->bitmask, &hdr);
1810         encode_nops(&hdr);
1811         return 0;
1812 }
1813
1814 /*
1815  * Encode REMOVE request
1816  */
1817 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1818 {
1819         struct xdr_stream xdr;
1820         struct compound_hdr hdr = {
1821                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1822         };
1823
1824         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1825         encode_compound_hdr(&xdr, req, &hdr);
1826         encode_sequence(&xdr, &args->seq_args, &hdr);
1827         encode_putfh(&xdr, args->fh, &hdr);
1828         encode_remove(&xdr, &args->name, &hdr);
1829         encode_getfattr(&xdr, args->bitmask, &hdr);
1830         encode_nops(&hdr);
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode RENAME request
1836  */
1837 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
1838 {
1839         struct xdr_stream xdr;
1840         struct compound_hdr hdr = {
1841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842         };
1843
1844         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1845         encode_compound_hdr(&xdr, req, &hdr);
1846         encode_sequence(&xdr, &args->seq_args, &hdr);
1847         encode_putfh(&xdr, args->old_dir, &hdr);
1848         encode_savefh(&xdr, &hdr);
1849         encode_putfh(&xdr, args->new_dir, &hdr);
1850         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1851         encode_getfattr(&xdr, args->bitmask, &hdr);
1852         encode_restorefh(&xdr, &hdr);
1853         encode_getfattr(&xdr, args->bitmask, &hdr);
1854         encode_nops(&hdr);
1855         return 0;
1856 }
1857
1858 /*
1859  * Encode LINK request
1860  */
1861 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1862 {
1863         struct xdr_stream xdr;
1864         struct compound_hdr hdr = {
1865                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1866         };
1867
1868         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1869         encode_compound_hdr(&xdr, req, &hdr);
1870         encode_sequence(&xdr, &args->seq_args, &hdr);
1871         encode_putfh(&xdr, args->fh, &hdr);
1872         encode_savefh(&xdr, &hdr);
1873         encode_putfh(&xdr, args->dir_fh, &hdr);
1874         encode_link(&xdr, args->name, &hdr);
1875         encode_getfattr(&xdr, args->bitmask, &hdr);
1876         encode_restorefh(&xdr, &hdr);
1877         encode_getfattr(&xdr, args->bitmask, &hdr);
1878         encode_nops(&hdr);
1879         return 0;
1880 }
1881
1882 /*
1883  * Encode CREATE request
1884  */
1885 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1886 {
1887         struct xdr_stream xdr;
1888         struct compound_hdr hdr = {
1889                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1890         };
1891
1892         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1893         encode_compound_hdr(&xdr, req, &hdr);
1894         encode_sequence(&xdr, &args->seq_args, &hdr);
1895         encode_putfh(&xdr, args->dir_fh, &hdr);
1896         encode_savefh(&xdr, &hdr);
1897         encode_create(&xdr, args, &hdr);
1898         encode_getfh(&xdr, &hdr);
1899         encode_getfattr(&xdr, args->bitmask, &hdr);
1900         encode_restorefh(&xdr, &hdr);
1901         encode_getfattr(&xdr, args->bitmask, &hdr);
1902         encode_nops(&hdr);
1903         return 0;
1904 }
1905
1906 /*
1907  * Encode SYMLINK request
1908  */
1909 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1910 {
1911         return nfs4_xdr_enc_create(req, p, args);
1912 }
1913
1914 /*
1915  * Encode GETATTR request
1916  */
1917 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1918 {
1919         struct xdr_stream xdr;
1920         struct compound_hdr hdr = {
1921                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1922         };
1923
1924         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1925         encode_compound_hdr(&xdr, req, &hdr);
1926         encode_sequence(&xdr, &args->seq_args, &hdr);
1927         encode_putfh(&xdr, args->fh, &hdr);
1928         encode_getfattr(&xdr, args->bitmask, &hdr);
1929         encode_nops(&hdr);
1930         return 0;
1931 }
1932
1933 /*
1934  * Encode a CLOSE request
1935  */
1936 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1937 {
1938         struct xdr_stream xdr;
1939         struct compound_hdr hdr = {
1940                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1941         };
1942
1943         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1944         encode_compound_hdr(&xdr, req, &hdr);
1945         encode_sequence(&xdr, &args->seq_args, &hdr);
1946         encode_putfh(&xdr, args->fh, &hdr);
1947         encode_close(&xdr, args, &hdr);
1948         encode_getfattr(&xdr, args->bitmask, &hdr);
1949         encode_nops(&hdr);
1950         return 0;
1951 }
1952
1953 /*
1954  * Encode an OPEN request
1955  */
1956 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1957 {
1958         struct xdr_stream xdr;
1959         struct compound_hdr hdr = {
1960                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1961         };
1962
1963         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1964         encode_compound_hdr(&xdr, req, &hdr);
1965         encode_sequence(&xdr, &args->seq_args, &hdr);
1966         encode_putfh(&xdr, args->fh, &hdr);
1967         encode_savefh(&xdr, &hdr);
1968         encode_open(&xdr, args, &hdr);
1969         encode_getfh(&xdr, &hdr);
1970         encode_getfattr(&xdr, args->bitmask, &hdr);
1971         encode_restorefh(&xdr, &hdr);
1972         encode_getfattr(&xdr, args->bitmask, &hdr);
1973         encode_nops(&hdr);
1974         return 0;
1975 }
1976
1977 /*
1978  * Encode an OPEN_CONFIRM request
1979  */
1980 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1981 {
1982         struct xdr_stream xdr;
1983         struct compound_hdr hdr = {
1984                 .nops   = 0,
1985         };
1986
1987         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1988         encode_compound_hdr(&xdr, req, &hdr);
1989         encode_putfh(&xdr, args->fh, &hdr);
1990         encode_open_confirm(&xdr, args, &hdr);
1991         encode_nops(&hdr);
1992         return 0;
1993 }
1994
1995 /*
1996  * Encode an OPEN request with no attributes.
1997  */
1998 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1999 {
2000         struct xdr_stream xdr;
2001         struct compound_hdr hdr = {
2002                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2003         };
2004
2005         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2006         encode_compound_hdr(&xdr, req, &hdr);
2007         encode_sequence(&xdr, &args->seq_args, &hdr);
2008         encode_putfh(&xdr, args->fh, &hdr);
2009         encode_open(&xdr, args, &hdr);
2010         encode_getfattr(&xdr, args->bitmask, &hdr);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  * Encode an OPEN_DOWNGRADE request
2017  */
2018 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
2019 {
2020         struct xdr_stream xdr;
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2026         encode_compound_hdr(&xdr, req, &hdr);
2027         encode_sequence(&xdr, &args->seq_args, &hdr);
2028         encode_putfh(&xdr, args->fh, &hdr);
2029         encode_open_downgrade(&xdr, args, &hdr);
2030         encode_getfattr(&xdr, args->bitmask, &hdr);
2031         encode_nops(&hdr);
2032         return 0;
2033 }
2034
2035 /*
2036  * Encode a LOCK request
2037  */
2038 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
2039 {
2040         struct xdr_stream xdr;
2041         struct compound_hdr hdr = {
2042                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2043         };
2044
2045         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2046         encode_compound_hdr(&xdr, req, &hdr);
2047         encode_sequence(&xdr, &args->seq_args, &hdr);
2048         encode_putfh(&xdr, args->fh, &hdr);
2049         encode_lock(&xdr, args, &hdr);
2050         encode_nops(&hdr);
2051         return 0;
2052 }
2053
2054 /*
2055  * Encode a LOCKT request
2056  */
2057 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
2058 {
2059         struct xdr_stream xdr;
2060         struct compound_hdr hdr = {
2061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062         };
2063
2064         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2065         encode_compound_hdr(&xdr, req, &hdr);
2066         encode_sequence(&xdr, &args->seq_args, &hdr);
2067         encode_putfh(&xdr, args->fh, &hdr);
2068         encode_lockt(&xdr, args, &hdr);
2069         encode_nops(&hdr);
2070         return 0;
2071 }
2072
2073 /*
2074  * Encode a LOCKU request
2075  */
2076 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
2077 {
2078         struct xdr_stream xdr;
2079         struct compound_hdr hdr = {
2080                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081         };
2082
2083         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2084         encode_compound_hdr(&xdr, req, &hdr);
2085         encode_sequence(&xdr, &args->seq_args, &hdr);
2086         encode_putfh(&xdr, args->fh, &hdr);
2087         encode_locku(&xdr, args, &hdr);
2088         encode_nops(&hdr);
2089         return 0;
2090 }
2091
2092 static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args)
2093 {
2094         struct xdr_stream xdr;
2095         struct compound_hdr hdr = {
2096                 .minorversion = 0,
2097         };
2098
2099         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2100         encode_compound_hdr(&xdr, req, &hdr);
2101         encode_release_lockowner(&xdr, &args->lock_owner, &hdr);
2102         encode_nops(&hdr);
2103         return 0;
2104 }
2105
2106 /*
2107  * Encode a READLINK request
2108  */
2109 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
2110 {
2111         struct xdr_stream xdr;
2112         struct compound_hdr hdr = {
2113                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2114         };
2115
2116         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2117         encode_compound_hdr(&xdr, req, &hdr);
2118         encode_sequence(&xdr, &args->seq_args, &hdr);
2119         encode_putfh(&xdr, args->fh, &hdr);
2120         encode_readlink(&xdr, args, req, &hdr);
2121
2122         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2123                         args->pgbase, args->pglen);
2124         encode_nops(&hdr);
2125         return 0;
2126 }
2127
2128 /*
2129  * Encode a READDIR request
2130  */
2131 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
2132 {
2133         struct xdr_stream xdr;
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2139         encode_compound_hdr(&xdr, req, &hdr);
2140         encode_sequence(&xdr, &args->seq_args, &hdr);
2141         encode_putfh(&xdr, args->fh, &hdr);
2142         encode_readdir(&xdr, args, req, &hdr);
2143
2144         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2145                          args->pgbase, args->count);
2146         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2147                         __func__, hdr.replen << 2, args->pages,
2148                         args->pgbase, args->count);
2149         encode_nops(&hdr);
2150         return 0;
2151 }
2152
2153 /*
2154  * Encode a READ request
2155  */
2156 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
2157 {
2158         struct xdr_stream xdr;
2159         struct compound_hdr hdr = {
2160                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2161         };
2162
2163         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2164         encode_compound_hdr(&xdr, req, &hdr);
2165         encode_sequence(&xdr, &args->seq_args, &hdr);
2166         encode_putfh(&xdr, args->fh, &hdr);
2167         encode_read(&xdr, args, &hdr);
2168
2169         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2170                          args->pages, args->pgbase, args->count);
2171         req->rq_rcv_buf.flags |= XDRBUF_READ;
2172         encode_nops(&hdr);
2173         return 0;
2174 }
2175
2176 /*
2177  * Encode an SETATTR request
2178  */
2179 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
2180 {
2181         struct xdr_stream xdr;
2182         struct compound_hdr hdr = {
2183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184         };
2185
2186         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2187         encode_compound_hdr(&xdr, req, &hdr);
2188         encode_sequence(&xdr, &args->seq_args, &hdr);
2189         encode_putfh(&xdr, args->fh, &hdr);
2190         encode_setattr(&xdr, args, args->server, &hdr);
2191         encode_getfattr(&xdr, args->bitmask, &hdr);
2192         encode_nops(&hdr);
2193         return 0;
2194 }
2195
2196 /*
2197  * Encode a GETACL request
2198  */
2199 static int
2200 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
2201                 struct nfs_getaclargs *args)
2202 {
2203         struct xdr_stream xdr;
2204         struct compound_hdr hdr = {
2205                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2206         };
2207         uint32_t replen;
2208
2209         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2210         encode_compound_hdr(&xdr, req, &hdr);
2211         encode_sequence(&xdr, &args->seq_args, &hdr);
2212         encode_putfh(&xdr, args->fh, &hdr);
2213         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2214         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
2215
2216         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2217                 args->acl_pages, args->acl_pgbase, args->acl_len);
2218         encode_nops(&hdr);
2219         return 0;
2220 }
2221
2222 /*
2223  * Encode a WRITE request
2224  */
2225 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2226 {
2227         struct xdr_stream xdr;
2228         struct compound_hdr hdr = {
2229                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2230         };
2231
2232         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2233         encode_compound_hdr(&xdr, req, &hdr);
2234         encode_sequence(&xdr, &args->seq_args, &hdr);
2235         encode_putfh(&xdr, args->fh, &hdr);
2236         encode_write(&xdr, args, &hdr);
2237         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2238         encode_getfattr(&xdr, args->bitmask, &hdr);
2239         encode_nops(&hdr);
2240         return 0;
2241 }
2242
2243 /*
2244  *  a COMMIT request
2245  */
2246 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
2247 {
2248         struct xdr_stream xdr;
2249         struct compound_hdr hdr = {
2250                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2251         };
2252
2253         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2254         encode_compound_hdr(&xdr, req, &hdr);
2255         encode_sequence(&xdr, &args->seq_args, &hdr);
2256         encode_putfh(&xdr, args->fh, &hdr);
2257         encode_commit(&xdr, args, &hdr);
2258         encode_getfattr(&xdr, args->bitmask, &hdr);
2259         encode_nops(&hdr);
2260         return 0;
2261 }
2262
2263 /*
2264  * FSINFO request
2265  */
2266 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args)
2267 {
2268         struct xdr_stream xdr;
2269         struct compound_hdr hdr = {
2270                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2271         };
2272
2273         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2274         encode_compound_hdr(&xdr, req, &hdr);
2275         encode_sequence(&xdr, &args->seq_args, &hdr);
2276         encode_putfh(&xdr, args->fh, &hdr);
2277         encode_fsinfo(&xdr, args->bitmask, &hdr);
2278         encode_nops(&hdr);
2279         return 0;
2280 }
2281
2282 /*
2283  * a PATHCONF request
2284  */
2285 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args)
2286 {
2287         struct xdr_stream xdr;
2288         struct compound_hdr hdr = {
2289                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2290         };
2291
2292         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2293         encode_compound_hdr(&xdr, req, &hdr);
2294         encode_sequence(&xdr, &args->seq_args, &hdr);
2295         encode_putfh(&xdr, args->fh, &hdr);
2296         encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2297                            &hdr);
2298         encode_nops(&hdr);
2299         return 0;
2300 }
2301
2302 /*
2303  * a STATFS request
2304  */
2305 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2306 {
2307         struct xdr_stream xdr;
2308         struct compound_hdr hdr = {
2309                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2310         };
2311
2312         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2313         encode_compound_hdr(&xdr, req, &hdr);
2314         encode_sequence(&xdr, &args->seq_args, &hdr);
2315         encode_putfh(&xdr, args->fh, &hdr);
2316         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2317                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2318         encode_nops(&hdr);
2319         return 0;
2320 }
2321
2322 /*
2323  * GETATTR_BITMAP request
2324  */
2325 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2326                                     struct nfs4_server_caps_arg *args)
2327 {
2328         struct xdr_stream xdr;
2329         struct compound_hdr hdr = {
2330                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2331         };
2332
2333         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2334         encode_compound_hdr(&xdr, req, &hdr);
2335         encode_sequence(&xdr, &args->seq_args, &hdr);
2336         encode_putfh(&xdr, args->fhandle, &hdr);
2337         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2338                            FATTR4_WORD0_LINK_SUPPORT|
2339                            FATTR4_WORD0_SYMLINK_SUPPORT|
2340                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2341         encode_nops(&hdr);
2342         return 0;
2343 }
2344
2345 /*
2346  * a RENEW request
2347  */
2348 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2349 {
2350         struct xdr_stream xdr;
2351         struct compound_hdr hdr = {
2352                 .nops   = 0,
2353         };
2354
2355         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2356         encode_compound_hdr(&xdr, req, &hdr);
2357         encode_renew(&xdr, clp, &hdr);
2358         encode_nops(&hdr);
2359         return 0;
2360 }
2361
2362 /*
2363  * a SETCLIENTID request
2364  */
2365 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2366 {
2367         struct xdr_stream xdr;
2368         struct compound_hdr hdr = {
2369                 .nops   = 0,
2370         };
2371
2372         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2373         encode_compound_hdr(&xdr, req, &hdr);
2374         encode_setclientid(&xdr, sc, &hdr);
2375         encode_nops(&hdr);
2376         return 0;
2377 }
2378
2379 /*
2380  * a SETCLIENTID_CONFIRM request
2381  */
2382 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg)
2383 {
2384         struct xdr_stream xdr;
2385         struct compound_hdr hdr = {
2386                 .nops   = 0,
2387         };
2388         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2389
2390         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2391         encode_compound_hdr(&xdr, req, &hdr);
2392         encode_setclientid_confirm(&xdr, arg, &hdr);
2393         encode_putrootfh(&xdr, &hdr);
2394         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2395         encode_nops(&hdr);
2396         return 0;
2397 }
2398
2399 /*
2400  * DELEGRETURN request
2401  */
2402 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2403 {
2404         struct xdr_stream xdr;
2405         struct compound_hdr hdr = {
2406                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2407         };
2408
2409         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2410         encode_compound_hdr(&xdr, req, &hdr);
2411         encode_sequence(&xdr, &args->seq_args, &hdr);
2412         encode_putfh(&xdr, args->fhandle, &hdr);
2413         encode_delegreturn(&xdr, args->stateid, &hdr);
2414         encode_getfattr(&xdr, args->bitmask, &hdr);
2415         encode_nops(&hdr);
2416         return 0;
2417 }
2418
2419 /*
2420  * Encode FS_LOCATIONS request
2421  */
2422 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2423 {
2424         struct xdr_stream xdr;
2425         struct compound_hdr hdr = {
2426                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2427         };
2428         uint32_t replen;
2429
2430         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2431         encode_compound_hdr(&xdr, req, &hdr);
2432         encode_sequence(&xdr, &args->seq_args, &hdr);
2433         encode_putfh(&xdr, args->dir_fh, &hdr);
2434         encode_lookup(&xdr, args->name, &hdr);
2435         replen = hdr.replen;    /* get the attribute into args->page */
2436         encode_fs_locations(&xdr, args->bitmask, &hdr);
2437
2438         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2439                         0, PAGE_SIZE);
2440         encode_nops(&hdr);
2441         return 0;
2442 }
2443
2444 #if defined(CONFIG_NFS_V4_1)
2445 /*
2446  * EXCHANGE_ID request
2447  */
2448 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2449                                     struct nfs41_exchange_id_args *args)
2450 {
2451         struct xdr_stream xdr;
2452         struct compound_hdr hdr = {
2453                 .minorversion = args->client->cl_mvops->minor_version,
2454         };
2455
2456         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2457         encode_compound_hdr(&xdr, req, &hdr);
2458         encode_exchange_id(&xdr, args, &hdr);
2459         encode_nops(&hdr);
2460         return 0;
2461 }
2462
2463 /*
2464  * a CREATE_SESSION request
2465  */
2466 static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p,
2467                                        struct nfs41_create_session_args *args)
2468 {
2469         struct xdr_stream xdr;
2470         struct compound_hdr hdr = {
2471                 .minorversion = args->client->cl_mvops->minor_version,
2472         };
2473
2474         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2475         encode_compound_hdr(&xdr, req, &hdr);
2476         encode_create_session(&xdr, args, &hdr);
2477         encode_nops(&hdr);
2478         return 0;
2479 }
2480
2481 /*
2482  * a DESTROY_SESSION request
2483  */
2484 static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p,
2485                                         struct nfs4_session *session)
2486 {
2487         struct xdr_stream xdr;
2488         struct compound_hdr hdr = {
2489                 .minorversion = session->clp->cl_mvops->minor_version,
2490         };
2491
2492         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2493         encode_compound_hdr(&xdr, req, &hdr);
2494         encode_destroy_session(&xdr, session, &hdr);
2495         encode_nops(&hdr);
2496         return 0;
2497 }
2498
2499 /*
2500  * a SEQUENCE request
2501  */
2502 static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p,
2503                                  struct nfs4_sequence_args *args)
2504 {
2505         struct xdr_stream xdr;
2506         struct compound_hdr hdr = {
2507                 .minorversion = nfs4_xdr_minorversion(args),
2508         };
2509
2510         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2511         encode_compound_hdr(&xdr, req, &hdr);
2512         encode_sequence(&xdr, args, &hdr);
2513         encode_nops(&hdr);
2514         return 0;
2515 }
2516
2517 /*
2518  * a GET_LEASE_TIME request
2519  */
2520 static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p,
2521                                        struct nfs4_get_lease_time_args *args)
2522 {
2523         struct xdr_stream xdr;
2524         struct compound_hdr hdr = {
2525                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2526         };
2527         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2528
2529         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2530         encode_compound_hdr(&xdr, req, &hdr);
2531         encode_sequence(&xdr, &args->la_seq_args, &hdr);
2532         encode_putrootfh(&xdr, &hdr);
2533         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2534         encode_nops(&hdr);
2535         return 0;
2536 }
2537
2538 /*
2539  * a RECLAIM_COMPLETE request
2540  */
2541 static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p,
2542                                      struct nfs41_reclaim_complete_args *args)
2543 {
2544         struct xdr_stream xdr;
2545         struct compound_hdr hdr = {
2546                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2547         };
2548
2549         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2550         encode_compound_hdr(&xdr, req, &hdr);
2551         encode_sequence(&xdr, &args->seq_args, &hdr);
2552         encode_reclaim_complete(&xdr, args, &hdr);
2553         encode_nops(&hdr);
2554         return 0;
2555 }
2556
2557 #endif /* CONFIG_NFS_V4_1 */
2558
2559 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2560 {
2561         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2562                 "Remaining buffer length is %tu words.\n",
2563                 func, xdr->end - xdr->p);
2564 }
2565
2566 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2567 {
2568         __be32 *p;
2569
2570         p = xdr_inline_decode(xdr, 4);
2571         if (unlikely(!p))
2572                 goto out_overflow;
2573         *len = be32_to_cpup(p);
2574         p = xdr_inline_decode(xdr, *len);
2575         if (unlikely(!p))
2576                 goto out_overflow;
2577         *string = (char *)p;
2578         return 0;
2579 out_overflow:
2580         print_overflow_msg(__func__, xdr);
2581         return -EIO;
2582 }
2583
2584 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2585 {
2586         __be32 *p;
2587
2588         p = xdr_inline_decode(xdr, 8);
2589         if (unlikely(!p))
2590                 goto out_overflow;
2591         hdr->status = be32_to_cpup(p++);
2592         hdr->taglen = be32_to_cpup(p);
2593
2594         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2595         if (unlikely(!p))
2596                 goto out_overflow;
2597         hdr->tag = (char *)p;
2598         p += XDR_QUADLEN(hdr->taglen);
2599         hdr->nops = be32_to_cpup(p);
2600         if (unlikely(hdr->nops < 1))
2601                 return nfs4_stat_to_errno(hdr->status);
2602         return 0;
2603 out_overflow:
2604         print_overflow_msg(__func__, xdr);
2605         return -EIO;
2606 }
2607
2608 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2609 {
2610         __be32 *p;
2611         uint32_t opnum;
2612         int32_t nfserr;
2613
2614         p = xdr_inline_decode(xdr, 8);
2615         if (unlikely(!p))
2616                 goto out_overflow;
2617         opnum = be32_to_cpup(p++);
2618         if (opnum != expected) {
2619                 dprintk("nfs: Server returned operation"
2620                         " %d but we issued a request for %d\n",
2621                                 opnum, expected);
2622                 return -EIO;
2623         }
2624         nfserr = be32_to_cpup(p);
2625         if (nfserr != NFS_OK)
2626                 return nfs4_stat_to_errno(nfserr);
2627         return 0;
2628 out_overflow:
2629         print_overflow_msg(__func__, xdr);
2630         return -EIO;
2631 }
2632
2633 /* Dummy routine */
2634 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2635 {
2636         __be32 *p;
2637         unsigned int strlen;
2638         char *str;
2639
2640         p = xdr_inline_decode(xdr, 12);
2641         if (likely(p))
2642                 return decode_opaque_inline(xdr, &strlen, &str);
2643         print_overflow_msg(__func__, xdr);
2644         return -EIO;
2645 }
2646
2647 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2648 {
2649         uint32_t bmlen;
2650         __be32 *p;
2651
2652         p = xdr_inline_decode(xdr, 4);
2653         if (unlikely(!p))
2654                 goto out_overflow;
2655         bmlen = be32_to_cpup(p);
2656
2657         bitmap[0] = bitmap[1] = 0;
2658         p = xdr_inline_decode(xdr, (bmlen << 2));
2659         if (unlikely(!p))
2660                 goto out_overflow;
2661         if (bmlen > 0) {
2662                 bitmap[0] = be32_to_cpup(p++);
2663                 if (bmlen > 1)
2664                         bitmap[1] = be32_to_cpup(p);
2665         }
2666         return 0;
2667 out_overflow:
2668         print_overflow_msg(__func__, xdr);
2669         return -EIO;
2670 }
2671
2672 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2673 {
2674         __be32 *p;
2675
2676         p = xdr_inline_decode(xdr, 4);
2677         if (unlikely(!p))
2678                 goto out_overflow;
2679         *attrlen = be32_to_cpup(p);
2680         *savep = xdr->p;
2681         return 0;
2682 out_overflow:
2683         print_overflow_msg(__func__, xdr);
2684         return -EIO;
2685 }
2686
2687 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2688 {
2689         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2690                 int ret;
2691                 ret = decode_attr_bitmap(xdr, bitmask);
2692                 if (unlikely(ret < 0))
2693                         return ret;
2694                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2695         } else
2696                 bitmask[0] = bitmask[1] = 0;
2697         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2698         return 0;
2699 }
2700
2701 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2702 {
2703         __be32 *p;
2704         int ret = 0;
2705
2706         *type = 0;
2707         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2708                 return -EIO;
2709         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2710                 p = xdr_inline_decode(xdr, 4);
2711                 if (unlikely(!p))
2712                         goto out_overflow;
2713                 *type = be32_to_cpup(p);
2714                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2715                         dprintk("%s: bad type %d\n", __func__, *type);
2716                         return -EIO;
2717                 }
2718                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2719                 ret = NFS_ATTR_FATTR_TYPE;
2720         }
2721         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2722         return ret;
2723 out_overflow:
2724         print_overflow_msg(__func__, xdr);
2725         return -EIO;
2726 }
2727
2728 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2729 {
2730         __be32 *p;
2731         int ret = 0;
2732
2733         *change = 0;
2734         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2735                 return -EIO;
2736         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2737                 p = xdr_inline_decode(xdr, 8);
2738                 if (unlikely(!p))
2739                         goto out_overflow;
2740                 xdr_decode_hyper(p, change);
2741                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2742                 ret = NFS_ATTR_FATTR_CHANGE;
2743         }
2744         dprintk("%s: change attribute=%Lu\n", __func__,
2745                         (unsigned long long)*change);
2746         return ret;
2747 out_overflow:
2748         print_overflow_msg(__func__, xdr);
2749         return -EIO;
2750 }
2751
2752 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2753 {
2754         __be32 *p;
2755         int ret = 0;
2756
2757         *size = 0;
2758         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2759                 return -EIO;
2760         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2761                 p = xdr_inline_decode(xdr, 8);
2762                 if (unlikely(!p))
2763                         goto out_overflow;
2764                 xdr_decode_hyper(p, size);
2765                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2766                 ret = NFS_ATTR_FATTR_SIZE;
2767         }
2768         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2769         return ret;
2770 out_overflow:
2771         print_overflow_msg(__func__, xdr);
2772         return -EIO;
2773 }
2774
2775 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2776 {
2777         __be32 *p;
2778
2779         *res = 0;
2780         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2781                 return -EIO;
2782         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2783                 p = xdr_inline_decode(xdr, 4);
2784                 if (unlikely(!p))
2785                         goto out_overflow;
2786                 *res = be32_to_cpup(p);
2787                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2788         }
2789         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2790         return 0;
2791 out_overflow:
2792         print_overflow_msg(__func__, xdr);
2793         return -EIO;
2794 }
2795
2796 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2797 {
2798         __be32 *p;
2799
2800         *res = 0;
2801         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2802                 return -EIO;
2803         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2804                 p = xdr_inline_decode(xdr, 4);
2805                 if (unlikely(!p))
2806                         goto out_overflow;
2807                 *res = be32_to_cpup(p);
2808                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2809         }
2810         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2811         return 0;
2812 out_overflow:
2813         print_overflow_msg(__func__, xdr);
2814         return -EIO;
2815 }
2816
2817 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2818 {
2819         __be32 *p;
2820         int ret = 0;
2821
2822         fsid->major = 0;
2823         fsid->minor = 0;
2824         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2825                 return -EIO;
2826         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2827                 p = xdr_inline_decode(xdr, 16);
2828                 if (unlikely(!p))
2829                         goto out_overflow;
2830                 p = xdr_decode_hyper(p, &fsid->major);
2831                 xdr_decode_hyper(p, &fsid->minor);
2832                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2833                 ret = NFS_ATTR_FATTR_FSID;
2834         }
2835         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2836                         (unsigned long long)fsid->major,
2837                         (unsigned long long)fsid->minor);
2838         return ret;
2839 out_overflow:
2840         print_overflow_msg(__func__, xdr);
2841         return -EIO;
2842 }
2843
2844 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2845 {
2846         __be32 *p;
2847
2848         *res = 60;
2849         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2850                 return -EIO;
2851         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2852                 p = xdr_inline_decode(xdr, 4);
2853                 if (unlikely(!p))
2854                         goto out_overflow;
2855                 *res = be32_to_cpup(p);
2856                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2857         }
2858         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2859         return 0;
2860 out_overflow:
2861         print_overflow_msg(__func__, xdr);
2862         return -EIO;
2863 }
2864
2865 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2866 {
2867         __be32 *p;
2868
2869         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2870                 return -EIO;
2871         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2872                 p = xdr_inline_decode(xdr, 4);
2873                 if (unlikely(!p))
2874                         goto out_overflow;
2875                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2876         }
2877         return 0;
2878 out_overflow:
2879         print_overflow_msg(__func__, xdr);
2880         return -EIO;
2881 }
2882
2883 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2884 {
2885         __be32 *p;
2886         int len;
2887
2888         if (fh != NULL)
2889                 memset(fh, 0, sizeof(*fh));
2890
2891         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2892                 return -EIO;
2893         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2894                 p = xdr_inline_decode(xdr, 4);
2895                 if (unlikely(!p))
2896                         goto out_overflow;
2897                 len = be32_to_cpup(p);
2898                 if (len > NFS4_FHSIZE)
2899                         return -EIO;
2900                 p = xdr_inline_decode(xdr, len);
2901                 if (unlikely(!p))
2902                         goto out_overflow;
2903                 if (fh != NULL) {
2904                         memcpy(fh->data, p, len);
2905                         fh->size = len;
2906                 }
2907                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2908         }
2909         return 0;
2910 out_overflow:
2911         print_overflow_msg(__func__, xdr);
2912         return -EIO;
2913 }
2914
2915 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2916 {
2917         __be32 *p;
2918
2919         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2920         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2921                 return -EIO;
2922         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2923                 p = xdr_inline_decode(xdr, 4);
2924                 if (unlikely(!p))
2925                         goto out_overflow;
2926                 *res = be32_to_cpup(p);
2927                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2928         }
2929         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2930         return 0;
2931 out_overflow:
2932         print_overflow_msg(__func__, xdr);
2933         return -EIO;
2934 }
2935
2936 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2937 {
2938         __be32 *p;
2939         int ret = 0;
2940
2941         *fileid = 0;
2942         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2943                 return -EIO;
2944         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2945                 p = xdr_inline_decode(xdr, 8);
2946                 if (unlikely(!p))
2947                         goto out_overflow;
2948                 xdr_decode_hyper(p, fileid);
2949                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2950                 ret = NFS_ATTR_FATTR_FILEID;
2951         }
2952         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2953         return ret;
2954 out_overflow:
2955         print_overflow_msg(__func__, xdr);
2956         return -EIO;
2957 }
2958
2959 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2960 {
2961         __be32 *p;
2962         int ret = 0;
2963
2964         *fileid = 0;
2965         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2966                 return -EIO;
2967         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2968                 p = xdr_inline_decode(xdr, 8);
2969                 if (unlikely(!p))
2970                         goto out_overflow;
2971                 xdr_decode_hyper(p, fileid);
2972                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2973                 ret = NFS_ATTR_FATTR_FILEID;
2974         }
2975         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2976         return ret;
2977 out_overflow:
2978         print_overflow_msg(__func__, xdr);
2979         return -EIO;
2980 }
2981
2982 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2983 {
2984         __be32 *p;
2985         int status = 0;
2986
2987         *res = 0;
2988         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2989                 return -EIO;
2990         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2991                 p = xdr_inline_decode(xdr, 8);
2992                 if (unlikely(!p))
2993                         goto out_overflow;
2994                 xdr_decode_hyper(p, res);
2995                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2996         }
2997         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2998         return status;
2999 out_overflow:
3000         print_overflow_msg(__func__, xdr);
3001         return -EIO;
3002 }
3003
3004 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3005 {
3006         __be32 *p;
3007         int status = 0;
3008
3009         *res = 0;
3010         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3011                 return -EIO;
3012         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3013                 p = xdr_inline_decode(xdr, 8);
3014                 if (unlikely(!p))
3015                         goto out_overflow;
3016                 xdr_decode_hyper(p, res);
3017                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3018         }
3019         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3020         return status;
3021 out_overflow:
3022         print_overflow_msg(__func__, xdr);
3023         return -EIO;
3024 }
3025
3026 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3027 {
3028         __be32 *p;
3029         int status = 0;
3030
3031         *res = 0;
3032         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3033                 return -EIO;
3034         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3035                 p = xdr_inline_decode(xdr, 8);
3036                 if (unlikely(!p))
3037                         goto out_overflow;
3038                 xdr_decode_hyper(p, res);
3039                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3040         }
3041         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3042         return status;
3043 out_overflow:
3044         print_overflow_msg(__func__, xdr);
3045         return -EIO;
3046 }
3047
3048 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3049 {
3050         u32 n;
3051         __be32 *p;
3052         int status = 0;
3053
3054         p = xdr_inline_decode(xdr, 4);
3055         if (unlikely(!p))
3056                 goto out_overflow;
3057         n = be32_to_cpup(p);
3058         if (n == 0)
3059                 goto root_path;
3060         dprintk("path ");
3061         path->ncomponents = 0;
3062         while (path->ncomponents < n) {
3063                 struct nfs4_string *component = &path->components[path->ncomponents];
3064                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3065                 if (unlikely(status != 0))
3066                         goto out_eio;
3067                 if (path->ncomponents != n)
3068                         dprintk("/");
3069                 dprintk("%s", component->data);
3070                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3071                         path->ncomponents++;
3072                 else {
3073                         dprintk("cannot parse %d components in path\n", n);
3074                         goto out_eio;
3075                 }
3076         }
3077 out:
3078         dprintk("\n");
3079         return status;
3080 root_path:
3081 /* a root pathname is sent as a zero component4 */
3082         path->ncomponents = 1;
3083         path->components[0].len=0;
3084         path->components[0].data=NULL;
3085         dprintk("path /\n");
3086         goto out;
3087 out_eio:
3088         dprintk(" status %d", status);
3089         status = -EIO;
3090         goto out;
3091 out_overflow:
3092         print_overflow_msg(__func__, xdr);
3093         return -EIO;
3094 }
3095
3096 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3097 {
3098         int n;
3099         __be32 *p;
3100         int status = -EIO;
3101
3102         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3103                 goto out;
3104         status = 0;
3105         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3106                 goto out;
3107         dprintk("%s: fsroot ", __func__);
3108         status = decode_pathname(xdr, &res->fs_path);
3109         if (unlikely(status != 0))
3110                 goto out;
3111         p = xdr_inline_decode(xdr, 4);
3112         if (unlikely(!p))
3113                 goto out_overflow;
3114         n = be32_to_cpup(p);
3115         if (n <= 0)
3116                 goto out_eio;
3117         res->nlocations = 0;
3118         while (res->nlocations < n) {
3119                 u32 m;
3120                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3121
3122                 p = xdr_inline_decode(xdr, 4);
3123                 if (unlikely(!p))
3124                         goto out_overflow;
3125                 m = be32_to_cpup(p);
3126
3127                 loc->nservers = 0;
3128                 dprintk("%s: servers ", __func__);
3129                 while (loc->nservers < m) {
3130                         struct nfs4_string *server = &loc->servers[loc->nservers];
3131                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3132                         if (unlikely(status != 0))
3133                                 goto out_eio;
3134                         dprintk("%s ", server->data);
3135                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3136                                 loc->nservers++;
3137                         else {
3138                                 unsigned int i;
3139                                 dprintk("%s: using first %u of %u servers "
3140                                         "returned for location %u\n",
3141                                                 __func__,
3142                                                 NFS4_FS_LOCATION_MAXSERVERS,
3143                                                 m, res->nlocations);
3144                                 for (i = loc->nservers; i < m; i++) {
3145                                         unsigned int len;
3146                                         char *data;
3147                                         status = decode_opaque_inline(xdr, &len, &data);
3148                                         if (unlikely(status != 0))
3149                                                 goto out_eio;
3150                                 }
3151                         }
3152                 }
3153                 status = decode_pathname(xdr, &loc->rootpath);
3154                 if (unlikely(status != 0))
3155                         goto out_eio;
3156                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3157                         res->nlocations++;
3158         }
3159         if (res->nlocations != 0)
3160                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3161 out:
3162         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3163         return status;
3164 out_overflow:
3165         print_overflow_msg(__func__, xdr);
3166 out_eio:
3167         status = -EIO;
3168         goto out;
3169 }
3170
3171 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3172 {
3173         __be32 *p;
3174         int status = 0;
3175
3176         *res = 0;
3177         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3178                 return -EIO;
3179         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3180                 p = xdr_inline_decode(xdr, 8);
3181                 if (unlikely(!p))
3182                         goto out_overflow;
3183                 xdr_decode_hyper(p, res);
3184                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3185         }
3186         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3187         return status;
3188 out_overflow:
3189         print_overflow_msg(__func__, xdr);
3190         return -EIO;
3191 }
3192
3193 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3194 {
3195         __be32 *p;
3196         int status = 0;
3197
3198         *maxlink = 1;
3199         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3200                 return -EIO;
3201         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3202                 p = xdr_inline_decode(xdr, 4);
3203                 if (unlikely(!p))
3204                         goto out_overflow;
3205                 *maxlink = be32_to_cpup(p);
3206                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3207         }
3208         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3209         return status;
3210 out_overflow:
3211         print_overflow_msg(__func__, xdr);
3212         return -EIO;
3213 }
3214
3215 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3216 {
3217         __be32 *p;
3218         int status = 0;
3219
3220         *maxname = 1024;
3221         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3222                 return -EIO;
3223         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3224                 p = xdr_inline_decode(xdr, 4);
3225                 if (unlikely(!p))
3226                         goto out_overflow;
3227                 *maxname = be32_to_cpup(p);
3228                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3229         }
3230         dprintk("%s: maxname=%u\n", __func__, *maxname);
3231         return status;
3232 out_overflow:
3233         print_overflow_msg(__func__, xdr);
3234         return -EIO;
3235 }
3236
3237 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3238 {
3239         __be32 *p;
3240         int status = 0;
3241
3242         *res = 1024;
3243         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3244                 return -EIO;
3245         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3246                 uint64_t maxread;
3247                 p = xdr_inline_decode(xdr, 8);
3248                 if (unlikely(!p))
3249                         goto out_overflow;
3250                 xdr_decode_hyper(p, &maxread);
3251                 if (maxread > 0x7FFFFFFF)
3252                         maxread = 0x7FFFFFFF;
3253                 *res = (uint32_t)maxread;
3254                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3255         }
3256         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3257         return status;
3258 out_overflow:
3259         print_overflow_msg(__func__, xdr);
3260         return -EIO;
3261 }
3262
3263 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3264 {
3265         __be32 *p;
3266         int status = 0;
3267
3268         *res = 1024;
3269         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3270                 return -EIO;
3271         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3272                 uint64_t maxwrite;
3273                 p = xdr_inline_decode(xdr, 8);
3274                 if (unlikely(!p))
3275                         goto out_overflow;
3276                 xdr_decode_hyper(p, &maxwrite);
3277                 if (maxwrite > 0x7FFFFFFF)
3278                         maxwrite = 0x7FFFFFFF;
3279                 *res = (uint32_t)maxwrite;
3280                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3281         }
3282         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3283         return status;
3284 out_overflow:
3285         print_overflow_msg(__func__, xdr);
3286         return -EIO;
3287 }
3288
3289 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3290 {
3291         uint32_t tmp;
3292         __be32 *p;
3293         int ret = 0;
3294
3295         *mode = 0;
3296         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3297                 return -EIO;
3298         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3299                 p = xdr_inline_decode(xdr, 4);
3300                 if (unlikely(!p))
3301                         goto out_overflow;
3302                 tmp = be32_to_cpup(p);
3303                 *mode = tmp & ~S_IFMT;
3304                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3305                 ret = NFS_ATTR_FATTR_MODE;
3306         }
3307         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3308         return ret;
3309 out_overflow:
3310         print_overflow_msg(__func__, xdr);
3311         return -EIO;
3312 }
3313
3314 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3315 {
3316         __be32 *p;
3317         int ret = 0;
3318
3319         *nlink = 1;
3320         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3321                 return -EIO;
3322         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3323                 p = xdr_inline_decode(xdr, 4);
3324                 if (unlikely(!p))
3325                         goto out_overflow;
3326                 *nlink = be32_to_cpup(p);
3327                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3328                 ret = NFS_ATTR_FATTR_NLINK;
3329         }
3330         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3331         return ret;
3332 out_overflow:
3333         print_overflow_msg(__func__, xdr);
3334         return -EIO;
3335 }
3336
3337 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3338                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3339 {
3340         uint32_t len;
3341         __be32 *p;
3342         int ret = 0;
3343
3344         *uid = -2;
3345         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3346                 return -EIO;
3347         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3348                 p = xdr_inline_decode(xdr, 4);
3349                 if (unlikely(!p))
3350                         goto out_overflow;
3351                 len = be32_to_cpup(p);
3352                 p = xdr_inline_decode(xdr, len);
3353                 if (unlikely(!p))
3354                         goto out_overflow;
3355                 if (!may_sleep) {
3356                         /* do nothing */
3357                 } else if (len < XDR_MAX_NETOBJ) {
3358                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3359                                 ret = NFS_ATTR_FATTR_OWNER;
3360                         else
3361                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3362                                                 __func__);
3363                 } else
3364                         dprintk("%s: name too long (%u)!\n",
3365                                         __func__, len);
3366                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3367         }
3368         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3369         return ret;
3370 out_overflow:
3371         print_overflow_msg(__func__, xdr);
3372         return -EIO;
3373 }
3374
3375 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3376                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3377 {
3378         uint32_t len;
3379         __be32 *p;
3380         int ret = 0;
3381
3382         *gid = -2;
3383         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3384                 return -EIO;
3385         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3386                 p = xdr_inline_decode(xdr, 4);
3387                 if (unlikely(!p))
3388                         goto out_overflow;
3389                 len = be32_to_cpup(p);
3390                 p = xdr_inline_decode(xdr, len);
3391                 if (unlikely(!p))
3392                         goto out_overflow;
3393                 if (!may_sleep) {
3394                         /* do nothing */
3395                 } else if (len < XDR_MAX_NETOBJ) {
3396                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3397                                 ret = NFS_ATTR_FATTR_GROUP;
3398                         else
3399                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3400                                                 __func__);
3401                 } else
3402                         dprintk("%s: name too long (%u)!\n",
3403                                         __func__, len);
3404                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3405         }
3406         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3407         return ret;
3408 out_overflow:
3409         print_overflow_msg(__func__, xdr);
3410         return -EIO;
3411 }
3412
3413 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3414 {
3415         uint32_t major = 0, minor = 0;
3416         __be32 *p;
3417         int ret = 0;
3418
3419         *rdev = MKDEV(0,0);
3420         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3421                 return -EIO;
3422         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3423                 dev_t tmp;
3424
3425                 p = xdr_inline_decode(xdr, 8);
3426                 if (unlikely(!p))
3427                         goto out_overflow;
3428                 major = be32_to_cpup(p++);
3429                 minor = be32_to_cpup(p);
3430                 tmp = MKDEV(major, minor);
3431                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3432                         *rdev = tmp;
3433                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3434                 ret = NFS_ATTR_FATTR_RDEV;
3435         }
3436         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3437         return ret;
3438 out_overflow:
3439         print_overflow_msg(__func__, xdr);
3440         return -EIO;
3441 }
3442
3443 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3444 {
3445         __be32 *p;
3446         int status = 0;
3447
3448         *res = 0;
3449         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3450                 return -EIO;
3451         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3452                 p = xdr_inline_decode(xdr, 8);
3453                 if (unlikely(!p))
3454                         goto out_overflow;
3455                 xdr_decode_hyper(p, res);
3456                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3457         }
3458         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3459         return status;
3460 out_overflow:
3461         print_overflow_msg(__func__, xdr);
3462         return -EIO;
3463 }
3464
3465 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3466 {
3467         __be32 *p;
3468         int status = 0;
3469
3470         *res = 0;
3471         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3472                 return -EIO;
3473         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3474                 p = xdr_inline_decode(xdr, 8);
3475                 if (unlikely(!p))
3476                         goto out_overflow;
3477                 xdr_decode_hyper(p, res);
3478                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3479         }
3480         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3481         return status;
3482 out_overflow:
3483         print_overflow_msg(__func__, xdr);
3484         return -EIO;
3485 }
3486
3487 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3488 {
3489         __be32 *p;
3490         int status = 0;
3491
3492         *res = 0;
3493         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3494                 return -EIO;
3495         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3496                 p = xdr_inline_decode(xdr, 8);
3497                 if (unlikely(!p))
3498                         goto out_overflow;
3499                 xdr_decode_hyper(p, res);
3500                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3501         }
3502         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3503         return status;
3504 out_overflow:
3505         print_overflow_msg(__func__, xdr);
3506         return -EIO;
3507 }
3508
3509 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3510 {
3511         __be32 *p;
3512         int ret = 0;
3513
3514         *used = 0;
3515         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3516                 return -EIO;
3517         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3518                 p = xdr_inline_decode(xdr, 8);
3519                 if (unlikely(!p))
3520                         goto out_overflow;
3521                 xdr_decode_hyper(p, used);
3522                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3523                 ret = NFS_ATTR_FATTR_SPACE_USED;
3524         }
3525         dprintk("%s: space used=%Lu\n", __func__,
3526                         (unsigned long long)*used);
3527         return ret;
3528 out_overflow:
3529         print_overflow_msg(__func__, xdr);
3530         return -EIO;
3531 }
3532
3533 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3534 {
3535         __be32 *p;
3536         uint64_t sec;
3537         uint32_t nsec;
3538
3539         p = xdr_inline_decode(xdr, 12);
3540         if (unlikely(!p))
3541                 goto out_overflow;
3542         p = xdr_decode_hyper(p, &sec);
3543         nsec = be32_to_cpup(p);
3544         time->tv_sec = (time_t)sec;
3545         time->tv_nsec = (long)nsec;
3546         return 0;
3547 out_overflow:
3548         print_overflow_msg(__func__, xdr);
3549         return -EIO;
3550 }
3551
3552 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3553 {
3554         int status = 0;
3555
3556         time->tv_sec = 0;
3557         time->tv_nsec = 0;
3558         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3559                 return -EIO;
3560         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3561                 status = decode_attr_time(xdr, time);
3562                 if (status == 0)
3563                         status = NFS_ATTR_FATTR_ATIME;
3564                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3565         }
3566         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3567         return status;
3568 }
3569
3570 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3571 {
3572         int status = 0;
3573
3574         time->tv_sec = 0;
3575         time->tv_nsec = 0;
3576         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3577                 return -EIO;
3578         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3579                 status = decode_attr_time(xdr, time);
3580                 if (status == 0)
3581                         status = NFS_ATTR_FATTR_CTIME;
3582                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3583         }
3584         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3585         return status;
3586 }
3587
3588 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3589                                   struct timespec *time)
3590 {
3591         int status = 0;
3592
3593         time->tv_sec = 0;
3594         time->tv_nsec = 0;
3595         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3596                 return -EIO;
3597         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3598                 status = decode_attr_time(xdr, time);
3599                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3600         }
3601         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3602                 (long)time->tv_nsec);
3603         return status;
3604 }
3605
3606 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3607 {
3608         int status = 0;
3609
3610         time->tv_sec = 0;
3611         time->tv_nsec = 0;
3612         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3613                 return -EIO;
3614         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3615                 status = decode_attr_time(xdr, time);
3616                 if (status == 0)
3617                         status = NFS_ATTR_FATTR_MTIME;
3618                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3619         }
3620         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3621         return status;
3622 }
3623
3624 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3625 {
3626         unsigned int attrwords = XDR_QUADLEN(attrlen);
3627         unsigned int nwords = xdr->p - savep;
3628
3629         if (unlikely(attrwords != nwords)) {
3630                 dprintk("%s: server returned incorrect attribute length: "
3631                         "%u %c %u\n",
3632                                 __func__,
3633                                 attrwords << 2,
3634                                 (attrwords < nwords) ? '<' : '>',
3635                                 nwords << 2);
3636                 return -EIO;
3637         }
3638         return 0;
3639 }
3640
3641 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3642 {
3643         __be32 *p;
3644
3645         p = xdr_inline_decode(xdr, 20);
3646         if (unlikely(!p))
3647                 goto out_overflow;
3648         cinfo->atomic = be32_to_cpup(p++);
3649         p = xdr_decode_hyper(p, &cinfo->before);
3650         xdr_decode_hyper(p, &cinfo->after);
3651         return 0;
3652 out_overflow:
3653         print_overflow_msg(__func__, xdr);
3654         return -EIO;
3655 }
3656
3657 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3658 {
3659         __be32 *p;
3660         uint32_t supp, acc;
3661         int status;
3662
3663         status = decode_op_hdr(xdr, OP_ACCESS);
3664         if (status)
3665                 return status;
3666         p = xdr_inline_decode(xdr, 8);
3667         if (unlikely(!p))
3668                 goto out_overflow;
3669         supp = be32_to_cpup(p++);
3670         acc = be32_to_cpup(p);
3671         access->supported = supp;
3672         access->access = acc;
3673         return 0;
3674 out_overflow:
3675         print_overflow_msg(__func__, xdr);
3676         return -EIO;
3677 }
3678
3679 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3680 {
3681         __be32 *p;
3682
3683         p = xdr_inline_decode(xdr, len);
3684         if (likely(p)) {
3685                 memcpy(buf, p, len);
3686                 return 0;
3687         }
3688         print_overflow_msg(__func__, xdr);
3689         return -EIO;
3690 }
3691
3692 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3693 {
3694         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3695 }
3696
3697 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3698 {
3699         int status;
3700
3701         status = decode_op_hdr(xdr, OP_CLOSE);
3702         if (status != -EIO)
3703                 nfs_increment_open_seqid(status, res->seqid);
3704         if (!status)
3705                 status = decode_stateid(xdr, &res->stateid);
3706         return status;
3707 }
3708
3709 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3710 {
3711         return decode_opaque_fixed(xdr, verifier, 8);
3712 }
3713
3714 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3715 {
3716         int status;
3717
3718         status = decode_op_hdr(xdr, OP_COMMIT);
3719         if (!status)
3720                 status = decode_verifier(xdr, res->verf->verifier);
3721         return status;
3722 }
3723
3724 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3725 {
3726         __be32 *p;
3727         uint32_t bmlen;
3728         int status;
3729
3730         status = decode_op_hdr(xdr, OP_CREATE);
3731         if (status)
3732                 return status;
3733         if ((status = decode_change_info(xdr, cinfo)))
3734                 return status;
3735         p = xdr_inline_decode(xdr, 4);
3736         if (unlikely(!p))
3737                 goto out_overflow;
3738         bmlen = be32_to_cpup(p);
3739         p = xdr_inline_decode(xdr, bmlen << 2);
3740         if (likely(p))
3741                 return 0;
3742 out_overflow:
3743         print_overflow_msg(__func__, xdr);
3744         return -EIO;
3745 }
3746
3747 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3748 {
3749         __be32 *savep;
3750         uint32_t attrlen, bitmap[2] = {0};
3751         int status;
3752
3753         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3754                 goto xdr_error;
3755         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3756                 goto xdr_error;
3757         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3758                 goto xdr_error;
3759         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3760                 goto xdr_error;
3761         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3762                 goto xdr_error;
3763         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3764                 goto xdr_error;
3765         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3766                 goto xdr_error;
3767         status = verify_attr_len(xdr, savep, attrlen);
3768 xdr_error:
3769         dprintk("%s: xdr returned %d!\n", __func__, -status);
3770         return status;
3771 }
3772
3773 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3774 {
3775         __be32 *savep;
3776         uint32_t attrlen, bitmap[2] = {0};
3777         int status;
3778
3779         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3780                 goto xdr_error;
3781         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3782                 goto xdr_error;
3783         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3784                 goto xdr_error;
3785
3786         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3787                 goto xdr_error;
3788         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3789                 goto xdr_error;
3790         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3791                 goto xdr_error;
3792         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3793                 goto xdr_error;
3794         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3795                 goto xdr_error;
3796         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3797                 goto xdr_error;
3798
3799         status = verify_attr_len(xdr, savep, attrlen);
3800 xdr_error:
3801         dprintk("%s: xdr returned %d!\n", __func__, -status);
3802         return status;
3803 }
3804
3805 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3806 {
3807         __be32 *savep;
3808         uint32_t attrlen, bitmap[2] = {0};
3809         int status;
3810
3811         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3812                 goto xdr_error;
3813         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3814                 goto xdr_error;
3815         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3816                 goto xdr_error;
3817
3818         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3819                 goto xdr_error;
3820         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3821                 goto xdr_error;
3822
3823         status = verify_attr_len(xdr, savep, attrlen);
3824 xdr_error:
3825         dprintk("%s: xdr returned %d!\n", __func__, -status);
3826         return status;
3827 }
3828
3829 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3830                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3831                 const struct nfs_server *server, int may_sleep)
3832 {
3833         int status;
3834         umode_t fmode = 0;
3835         uint64_t fileid;
3836         uint32_t type;
3837
3838         status = decode_attr_type(xdr, bitmap, &type);
3839         if (status < 0)
3840                 goto xdr_error;
3841         fattr->mode = 0;
3842         if (status != 0) {
3843                 fattr->mode |= nfs_type2fmt[type];
3844                 fattr->valid |= status;
3845         }
3846
3847         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3848         if (status < 0)
3849                 goto xdr_error;
3850         fattr->valid |= status;
3851
3852         status = decode_attr_size(xdr, bitmap, &fattr->size);
3853         if (status < 0)
3854                 goto xdr_error;
3855         fattr->valid |= status;
3856
3857         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3858         if (status < 0)
3859                 goto xdr_error;
3860         fattr->valid |= status;
3861
3862         status = decode_attr_error(xdr, bitmap);
3863         if (status < 0)
3864                 goto xdr_error;
3865
3866         status = decode_attr_filehandle(xdr, bitmap, fh);
3867         if (status < 0)
3868                 goto xdr_error;
3869
3870         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3871         if (status < 0)
3872                 goto xdr_error;
3873         fattr->valid |= status;
3874
3875         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3876                                                 struct nfs4_fs_locations,
3877                                                 fattr));
3878         if (status < 0)
3879                 goto xdr_error;
3880         fattr->valid |= status;
3881
3882         status = decode_attr_mode(xdr, bitmap, &fmode);
3883         if (status < 0)
3884                 goto xdr_error;
3885         if (status != 0) {
3886                 fattr->mode |= fmode;
3887                 fattr->valid |= status;
3888         }
3889
3890         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3891         if (status < 0)
3892                 goto xdr_error;
3893         fattr->valid |= status;
3894
3895         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3896                         &fattr->uid, may_sleep);
3897         if (status < 0)
3898                 goto xdr_error;
3899         fattr->valid |= status;
3900
3901         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3902                         &fattr->gid, may_sleep);
3903         if (status < 0)
3904                 goto xdr_error;
3905         fattr->valid |= status;
3906
3907         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3908         if (status < 0)
3909                 goto xdr_error;
3910         fattr->valid |= status;
3911
3912         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3913         if (status < 0)
3914                 goto xdr_error;
3915         fattr->valid |= status;
3916
3917         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3918         if (status < 0)
3919                 goto xdr_error;
3920         fattr->valid |= status;
3921
3922         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3923         if (status < 0)
3924                 goto xdr_error;
3925         fattr->valid |= status;
3926
3927         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3928         if (status < 0)
3929                 goto xdr_error;
3930         fattr->valid |= status;
3931
3932         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3933         if (status < 0)
3934                 goto xdr_error;
3935         if (status != 0 && !(fattr->valid & status)) {
3936                 fattr->fileid = fileid;
3937                 fattr->valid |= status;
3938         }
3939
3940 xdr_error:
3941         dprintk("%s: xdr returned %d\n", __func__, -status);
3942         return status;
3943 }
3944
3945 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3946                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3947 {
3948         __be32 *savep;
3949         uint32_t attrlen,
3950                  bitmap[2] = {0};
3951         int status;
3952
3953         status = decode_op_hdr(xdr, OP_GETATTR);
3954         if (status < 0)
3955                 goto xdr_error;
3956
3957         status = decode_attr_bitmap(xdr, bitmap);
3958         if (status < 0)
3959                 goto xdr_error;
3960
3961         status = decode_attr_length(xdr, &attrlen, &savep);
3962         if (status < 0)
3963                 goto xdr_error;
3964
3965         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
3966         if (status < 0)
3967                 goto xdr_error;
3968
3969         status = verify_attr_len(xdr, savep, attrlen);
3970 xdr_error:
3971         dprintk("%s: xdr returned %d\n", __func__, -status);
3972         return status;
3973 }
3974
3975 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3976                 const struct nfs_server *server, int may_sleep)
3977 {
3978         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
3979 }
3980
3981 /*
3982  * Decode potentially multiple layout types. Currently we only support
3983  * one layout driver per file system.
3984  */
3985 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
3986                                          uint32_t *layouttype)
3987 {
3988         uint32_t *p;
3989         int num;
3990
3991         p = xdr_inline_decode(xdr, 4);
3992         if (unlikely(!p))
3993                 goto out_overflow;
3994         num = be32_to_cpup(p);
3995
3996         /* pNFS is not supported by the underlying file system */
3997         if (num == 0) {
3998                 *layouttype = 0;
3999                 return 0;
4000         }
4001         if (num > 1)
4002                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4003                         "per filesystem not supported\n", __func__);
4004
4005         /* Decode and set first layout type, move xdr->p past unused types */
4006         p = xdr_inline_decode(xdr, num * 4);
4007         if (unlikely(!p))
4008                 goto out_overflow;
4009         *layouttype = be32_to_cpup(p);
4010         return 0;
4011 out_overflow:
4012         print_overflow_msg(__func__, xdr);
4013         return -EIO;
4014 }
4015
4016 /*
4017  * The type of file system exported.
4018  * Note we must ensure that layouttype is set in any non-error case.
4019  */
4020 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4021                                 uint32_t *layouttype)
4022 {
4023         int status = 0;
4024
4025         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4026         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4027                 return -EIO;
4028         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4029                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4030                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4031         } else
4032                 *layouttype = 0;
4033         return status;
4034 }
4035
4036 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4037 {
4038         __be32 *savep;
4039         uint32_t attrlen, bitmap[2];
4040         int status;
4041
4042         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4043                 goto xdr_error;
4044         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4045                 goto xdr_error;
4046         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4047                 goto xdr_error;
4048
4049         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4050
4051         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4052                 goto xdr_error;
4053         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4054                 goto xdr_error;
4055         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4056                 goto xdr_error;
4057         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4058         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4059                 goto xdr_error;
4060         fsinfo->wtpref = fsinfo->wtmax;
4061         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4062         if (status != 0)
4063                 goto xdr_error;
4064         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4065         if (status != 0)
4066                 goto xdr_error;
4067
4068         status = verify_attr_len(xdr, savep, attrlen);
4069 xdr_error:
4070         dprintk("%s: xdr returned %d!\n", __func__, -status);
4071         return status;
4072 }
4073
4074 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4075 {
4076         __be32 *p;
4077         uint32_t len;
4078         int status;
4079
4080         /* Zero handle first to allow comparisons */
4081         memset(fh, 0, sizeof(*fh));
4082
4083         status = decode_op_hdr(xdr, OP_GETFH);
4084         if (status)
4085                 return status;
4086
4087         p = xdr_inline_decode(xdr, 4);
4088         if (unlikely(!p))
4089                 goto out_overflow;
4090         len = be32_to_cpup(p);
4091         if (len > NFS4_FHSIZE)
4092                 return -EIO;
4093         fh->size = len;
4094         p = xdr_inline_decode(xdr, len);
4095         if (unlikely(!p))
4096                 goto out_overflow;
4097         memcpy(fh->data, p, len);
4098         return 0;
4099 out_overflow:
4100         print_overflow_msg(__func__, xdr);
4101         return -EIO;
4102 }
4103
4104 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4105 {
4106         int status;
4107
4108         status = decode_op_hdr(xdr, OP_LINK);
4109         if (status)
4110                 return status;
4111         return decode_change_info(xdr, cinfo);
4112 }
4113
4114 /*
4115  * We create the owner, so we know a proper owner.id length is 4.
4116  */
4117 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4118 {
4119         uint64_t offset, length, clientid;
4120         __be32 *p;
4121         uint32_t namelen, type;
4122
4123         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4124         if (unlikely(!p))
4125                 goto out_overflow;
4126         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4127         p = xdr_decode_hyper(p, &length);
4128         type = be32_to_cpup(p++); /* 4 byte read */
4129         if (fl != NULL) { /* manipulate file lock */
4130                 fl->fl_start = (loff_t)offset;
4131                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4132                 if (length == ~(uint64_t)0)
4133                         fl->fl_end = OFFSET_MAX;
4134                 fl->fl_type = F_WRLCK;
4135                 if (type & 1)
4136                         fl->fl_type = F_RDLCK;
4137                 fl->fl_pid = 0;
4138         }
4139         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4140         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4141         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4142         if (likely(p))
4143                 return -NFS4ERR_DENIED;
4144 out_overflow:
4145         print_overflow_msg(__func__, xdr);
4146         return -EIO;
4147 }
4148
4149 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4150 {
4151         int status;
4152
4153         status = decode_op_hdr(xdr, OP_LOCK);
4154         if (status == -EIO)
4155                 goto out;
4156         if (status == 0) {
4157                 status = decode_stateid(xdr, &res->stateid);
4158                 if (unlikely(status))
4159                         goto out;
4160         } else if (status == -NFS4ERR_DENIED)
4161                 status = decode_lock_denied(xdr, NULL);
4162         if (res->open_seqid != NULL)
4163                 nfs_increment_open_seqid(status, res->open_seqid);
4164         nfs_increment_lock_seqid(status, res->lock_seqid);
4165 out:
4166         return status;
4167 }
4168
4169 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4170 {
4171         int status;
4172         status = decode_op_hdr(xdr, OP_LOCKT);
4173         if (status == -NFS4ERR_DENIED)
4174                 return decode_lock_denied(xdr, res->denied);
4175         return status;
4176 }
4177
4178 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4179 {
4180         int status;
4181
4182         status = decode_op_hdr(xdr, OP_LOCKU);
4183         if (status != -EIO)
4184                 nfs_increment_lock_seqid(status, res->seqid);
4185         if (status == 0)
4186                 status = decode_stateid(xdr, &res->stateid);
4187         return status;
4188 }
4189
4190 static int decode_release_lockowner(struct xdr_stream *xdr)
4191 {
4192         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4193 }
4194
4195 static int decode_lookup(struct xdr_stream *xdr)
4196 {
4197         return decode_op_hdr(xdr, OP_LOOKUP);
4198 }
4199
4200 /* This is too sick! */
4201 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4202 {
4203         __be32 *p;
4204         uint32_t limit_type, nblocks, blocksize;
4205
4206         p = xdr_inline_decode(xdr, 12);
4207         if (unlikely(!p))
4208                 goto out_overflow;
4209         limit_type = be32_to_cpup(p++);
4210         switch (limit_type) {
4211         case 1:
4212                 xdr_decode_hyper(p, maxsize);
4213                 break;
4214         case 2:
4215                 nblocks = be32_to_cpup(p++);
4216                 blocksize = be32_to_cpup(p);
4217                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4218         }
4219         return 0;
4220 out_overflow:
4221         print_overflow_msg(__func__, xdr);
4222         return -EIO;
4223 }
4224
4225 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4226 {
4227         __be32 *p;
4228         uint32_t delegation_type;
4229         int status;
4230
4231         p = xdr_inline_decode(xdr, 4);
4232         if (unlikely(!p))
4233                 goto out_overflow;
4234         delegation_type = be32_to_cpup(p);
4235         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4236                 res->delegation_type = 0;
4237                 return 0;
4238         }
4239         status = decode_stateid(xdr, &res->delegation);
4240         if (unlikely(status))
4241                 return status;
4242         p = xdr_inline_decode(xdr, 4);
4243         if (unlikely(!p))
4244                 goto out_overflow;
4245         res->do_recall = be32_to_cpup(p);
4246
4247         switch (delegation_type) {
4248         case NFS4_OPEN_DELEGATE_READ:
4249                 res->delegation_type = FMODE_READ;
4250                 break;
4251         case NFS4_OPEN_DELEGATE_WRITE:
4252                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4253                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4254                                 return -EIO;
4255         }
4256         return decode_ace(xdr, NULL, res->server->nfs_client);
4257 out_overflow:
4258         print_overflow_msg(__func__, xdr);
4259         return -EIO;
4260 }
4261
4262 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4263 {
4264         __be32 *p;
4265         uint32_t savewords, bmlen, i;
4266         int status;
4267
4268         status = decode_op_hdr(xdr, OP_OPEN);
4269         if (status != -EIO)
4270                 nfs_increment_open_seqid(status, res->seqid);
4271         if (!status)
4272                 status = decode_stateid(xdr, &res->stateid);
4273         if (unlikely(status))
4274                 return status;
4275
4276         decode_change_info(xdr, &res->cinfo);
4277
4278         p = xdr_inline_decode(xdr, 8);
4279         if (unlikely(!p))
4280                 goto out_overflow;
4281         res->rflags = be32_to_cpup(p++);
4282         bmlen = be32_to_cpup(p);
4283         if (bmlen > 10)
4284                 goto xdr_error;
4285
4286         p = xdr_inline_decode(xdr, bmlen << 2);
4287         if (unlikely(!p))
4288                 goto out_overflow;
4289         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4290         for (i = 0; i < savewords; ++i)
4291                 res->attrset[i] = be32_to_cpup(p++);
4292         for (; i < NFS4_BITMAP_SIZE; i++)
4293                 res->attrset[i] = 0;
4294
4295         return decode_delegation(xdr, res);
4296 xdr_error:
4297         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4298         return -EIO;
4299 out_overflow:
4300         print_overflow_msg(__func__, xdr);
4301         return -EIO;
4302 }
4303
4304 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4305 {
4306         int status;
4307
4308         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4309         if (status != -EIO)
4310                 nfs_increment_open_seqid(status, res->seqid);
4311         if (!status)
4312                 status = decode_stateid(xdr, &res->stateid);
4313         return status;
4314 }
4315
4316 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4317 {
4318         int status;
4319
4320         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4321         if (status != -EIO)
4322                 nfs_increment_open_seqid(status, res->seqid);
4323         if (!status)
4324                 status = decode_stateid(xdr, &res->stateid);
4325         return status;
4326 }
4327
4328 static int decode_putfh(struct xdr_stream *xdr)
4329 {
4330         return decode_op_hdr(xdr, OP_PUTFH);
4331 }
4332
4333 static int decode_putrootfh(struct xdr_stream *xdr)
4334 {
4335         return decode_op_hdr(xdr, OP_PUTROOTFH);
4336 }
4337
4338 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4339 {
4340         struct kvec *iov = req->rq_rcv_buf.head;
4341         __be32 *p;
4342         uint32_t count, eof, recvd, hdrlen;
4343         int status;
4344
4345         status = decode_op_hdr(xdr, OP_READ);
4346         if (status)
4347                 return status;
4348         p = xdr_inline_decode(xdr, 8);
4349         if (unlikely(!p))
4350                 goto out_overflow;
4351         eof = be32_to_cpup(p++);
4352         count = be32_to_cpup(p);
4353         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
4354         recvd = req->rq_rcv_buf.len - hdrlen;
4355         if (count > recvd) {
4356                 dprintk("NFS: server cheating in read reply: "
4357                                 "count %u > recvd %u\n", count, recvd);
4358                 count = recvd;
4359                 eof = 0;
4360         }
4361         xdr_read_pages(xdr, count);
4362         res->eof = eof;
4363         res->count = count;
4364         return 0;
4365 out_overflow:
4366         print_overflow_msg(__func__, xdr);
4367         return -EIO;
4368 }
4369
4370 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4371 {
4372         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4373         struct kvec     *iov = rcvbuf->head;
4374         size_t          hdrlen;
4375         u32             recvd, pglen = rcvbuf->page_len;
4376         int             status;
4377
4378         status = decode_op_hdr(xdr, OP_READDIR);
4379         if (!status)
4380                 status = decode_verifier(xdr, readdir->verifier.data);
4381         if (unlikely(status))
4382                 return status;
4383         dprintk("%s: verifier = %08x:%08x\n",
4384                         __func__,
4385                         ((u32 *)readdir->verifier.data)[0],
4386                         ((u32 *)readdir->verifier.data)[1]);
4387
4388
4389         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4390         recvd = rcvbuf->len - hdrlen;
4391         if (pglen > recvd)
4392                 pglen = recvd;
4393         xdr_read_pages(xdr, pglen);
4394
4395
4396         return 0;
4397 }
4398
4399 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4400 {
4401         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4402         struct kvec *iov = rcvbuf->head;
4403         size_t hdrlen;
4404         u32 len, recvd;
4405         __be32 *p;
4406         int status;
4407
4408         status = decode_op_hdr(xdr, OP_READLINK);
4409         if (status)
4410                 return status;
4411
4412         /* Convert length of symlink */
4413         p = xdr_inline_decode(xdr, 4);
4414         if (unlikely(!p))
4415                 goto out_overflow;
4416         len = be32_to_cpup(p);
4417         if (len >= rcvbuf->page_len || len <= 0) {
4418                 dprintk("nfs: server returned giant symlink!\n");
4419                 return -ENAMETOOLONG;
4420         }
4421         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4422         recvd = req->rq_rcv_buf.len - hdrlen;
4423         if (recvd < len) {
4424                 dprintk("NFS: server cheating in readlink reply: "
4425                                 "count %u > recvd %u\n", len, recvd);
4426                 return -EIO;
4427         }
4428         xdr_read_pages(xdr, len);
4429         /*
4430          * The XDR encode routine has set things up so that
4431          * the link text will be copied directly into the
4432          * buffer.  We just have to do overflow-checking,
4433          * and and null-terminate the text (the VFS expects
4434          * null-termination).
4435          */
4436         xdr_terminate_string(rcvbuf, len);
4437         return 0;
4438 out_overflow:
4439         print_overflow_msg(__func__, xdr);
4440         return -EIO;
4441 }
4442
4443 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4444 {
4445         int status;
4446
4447         status = decode_op_hdr(xdr, OP_REMOVE);
4448         if (status)
4449                 goto out;
4450         status = decode_change_info(xdr, cinfo);
4451 out:
4452         return status;
4453 }
4454
4455 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4456               struct nfs4_change_info *new_cinfo)
4457 {
4458         int status;
4459
4460         status = decode_op_hdr(xdr, OP_RENAME);
4461         if (status)
4462                 goto out;
4463         if ((status = decode_change_info(xdr, old_cinfo)))
4464                 goto out;
4465         status = decode_change_info(xdr, new_cinfo);
4466 out:
4467         return status;
4468 }
4469
4470 static int decode_renew(struct xdr_stream *xdr)
4471 {
4472         return decode_op_hdr(xdr, OP_RENEW);
4473 }
4474
4475 static int
4476 decode_restorefh(struct xdr_stream *xdr)
4477 {
4478         return decode_op_hdr(xdr, OP_RESTOREFH);
4479 }
4480
4481 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4482                 size_t *acl_len)
4483 {
4484         __be32 *savep;
4485         uint32_t attrlen,
4486                  bitmap[2] = {0};
4487         struct kvec *iov = req->rq_rcv_buf.head;
4488         int status;
4489
4490         *acl_len = 0;
4491         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4492                 goto out;
4493         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4494                 goto out;
4495         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4496                 goto out;
4497
4498         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4499                 return -EIO;
4500         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4501                 size_t hdrlen;
4502                 u32 recvd;
4503
4504                 /* We ignore &savep and don't do consistency checks on
4505                  * the attr length.  Let userspace figure it out.... */
4506                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4507                 recvd = req->rq_rcv_buf.len - hdrlen;
4508                 if (attrlen > recvd) {
4509                         dprintk("NFS: server cheating in getattr"
4510                                         " acl reply: attrlen %u > recvd %u\n",
4511                                         attrlen, recvd);
4512                         return -EINVAL;
4513                 }
4514                 xdr_read_pages(xdr, attrlen);
4515                 *acl_len = attrlen;
4516         } else
4517                 status = -EOPNOTSUPP;
4518
4519 out:
4520         return status;
4521 }
4522
4523 static int
4524 decode_savefh(struct xdr_stream *xdr)
4525 {
4526         return decode_op_hdr(xdr, OP_SAVEFH);
4527 }
4528
4529 static int decode_setattr(struct xdr_stream *xdr)
4530 {
4531         __be32 *p;
4532         uint32_t bmlen;
4533         int status;
4534
4535         status = decode_op_hdr(xdr, OP_SETATTR);
4536         if (status)
4537                 return status;
4538         p = xdr_inline_decode(xdr, 4);
4539         if (unlikely(!p))
4540                 goto out_overflow;
4541         bmlen = be32_to_cpup(p);
4542         p = xdr_inline_decode(xdr, bmlen << 2);
4543         if (likely(p))
4544                 return 0;
4545 out_overflow:
4546         print_overflow_msg(__func__, xdr);
4547         return -EIO;
4548 }
4549
4550 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4551 {
4552         __be32 *p;
4553         uint32_t opnum;
4554         int32_t nfserr;
4555
4556         p = xdr_inline_decode(xdr, 8);
4557         if (unlikely(!p))
4558                 goto out_overflow;
4559         opnum = be32_to_cpup(p++);
4560         if (opnum != OP_SETCLIENTID) {
4561                 dprintk("nfs: decode_setclientid: Server returned operation"
4562                         " %d\n", opnum);
4563                 return -EIO;
4564         }
4565         nfserr = be32_to_cpup(p);
4566         if (nfserr == NFS_OK) {
4567                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4568                 if (unlikely(!p))
4569                         goto out_overflow;
4570                 p = xdr_decode_hyper(p, &res->clientid);
4571                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4572         } else if (nfserr == NFSERR_CLID_INUSE) {
4573                 uint32_t len;
4574
4575                 /* skip netid string */
4576                 p = xdr_inline_decode(xdr, 4);
4577                 if (unlikely(!p))
4578                         goto out_overflow;
4579                 len = be32_to_cpup(p);
4580                 p = xdr_inline_decode(xdr, len);
4581                 if (unlikely(!p))
4582                         goto out_overflow;
4583
4584                 /* skip uaddr string */
4585                 p = xdr_inline_decode(xdr, 4);
4586                 if (unlikely(!p))
4587                         goto out_overflow;
4588                 len = be32_to_cpup(p);
4589                 p = xdr_inline_decode(xdr, len);
4590                 if (unlikely(!p))
4591                         goto out_overflow;
4592                 return -NFSERR_CLID_INUSE;
4593         } else
4594                 return nfs4_stat_to_errno(nfserr);
4595
4596         return 0;
4597 out_overflow:
4598         print_overflow_msg(__func__, xdr);
4599         return -EIO;
4600 }
4601
4602 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4603 {
4604         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4605 }
4606
4607 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4608 {
4609         __be32 *p;
4610         int status;
4611
4612         status = decode_op_hdr(xdr, OP_WRITE);
4613         if (status)
4614                 return status;
4615
4616         p = xdr_inline_decode(xdr, 16);
4617         if (unlikely(!p))
4618                 goto out_overflow;
4619         res->count = be32_to_cpup(p++);
4620         res->verf->committed = be32_to_cpup(p++);
4621         memcpy(res->verf->verifier, p, 8);
4622         return 0;
4623 out_overflow:
4624         print_overflow_msg(__func__, xdr);
4625         return -EIO;
4626 }
4627
4628 static int decode_delegreturn(struct xdr_stream *xdr)
4629 {
4630         return decode_op_hdr(xdr, OP_DELEGRETURN);
4631 }
4632
4633 #if defined(CONFIG_NFS_V4_1)
4634 static int decode_exchange_id(struct xdr_stream *xdr,
4635                               struct nfs41_exchange_id_res *res)
4636 {
4637         __be32 *p;
4638         uint32_t dummy;
4639         char *dummy_str;
4640         int status;
4641         struct nfs_client *clp = res->client;
4642
4643         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4644         if (status)
4645                 return status;
4646
4647         p = xdr_inline_decode(xdr, 8);
4648         if (unlikely(!p))
4649                 goto out_overflow;
4650         xdr_decode_hyper(p, &clp->cl_ex_clid);
4651         p = xdr_inline_decode(xdr, 12);
4652         if (unlikely(!p))
4653                 goto out_overflow;
4654         clp->cl_seqid = be32_to_cpup(p++);
4655         clp->cl_exchange_flags = be32_to_cpup(p++);
4656
4657         /* We ask for SP4_NONE */
4658         dummy = be32_to_cpup(p);
4659         if (dummy != SP4_NONE)
4660                 return -EIO;
4661
4662         /* Throw away minor_id */
4663         p = xdr_inline_decode(xdr, 8);
4664         if (unlikely(!p))
4665                 goto out_overflow;
4666
4667         /* Throw away Major id */
4668         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4669         if (unlikely(status))
4670                 return status;
4671
4672         /* Throw away server_scope */
4673         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4674         if (unlikely(status))
4675                 return status;
4676
4677         /* Throw away Implementation id array */
4678         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4679         if (unlikely(status))
4680                 return status;
4681
4682         return 0;
4683 out_overflow:
4684         print_overflow_msg(__func__, xdr);
4685         return -EIO;
4686 }
4687
4688 static int decode_chan_attrs(struct xdr_stream *xdr,
4689                              struct nfs4_channel_attrs *attrs)
4690 {
4691         __be32 *p;
4692         u32 nr_attrs;
4693
4694         p = xdr_inline_decode(xdr, 28);
4695         if (unlikely(!p))
4696                 goto out_overflow;
4697         attrs->headerpadsz = be32_to_cpup(p++);
4698         attrs->max_rqst_sz = be32_to_cpup(p++);
4699         attrs->max_resp_sz = be32_to_cpup(p++);
4700         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4701         attrs->max_ops = be32_to_cpup(p++);
4702         attrs->max_reqs = be32_to_cpup(p++);
4703         nr_attrs = be32_to_cpup(p);
4704         if (unlikely(nr_attrs > 1)) {
4705                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4706                         __func__, nr_attrs);
4707                 return -EINVAL;
4708         }
4709         if (nr_attrs == 1) {
4710                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4711                 if (unlikely(!p))
4712                         goto out_overflow;
4713         }
4714         return 0;
4715 out_overflow:
4716         print_overflow_msg(__func__, xdr);
4717         return -EIO;
4718 }
4719
4720 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4721 {
4722         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4723 }
4724
4725 static int decode_create_session(struct xdr_stream *xdr,
4726                                  struct nfs41_create_session_res *res)
4727 {
4728         __be32 *p;
4729         int status;
4730         struct nfs_client *clp = res->client;
4731         struct nfs4_session *session = clp->cl_session;
4732
4733         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4734         if (!status)
4735                 status = decode_sessionid(xdr, &session->sess_id);
4736         if (unlikely(status))
4737                 return status;
4738
4739         /* seqid, flags */
4740         p = xdr_inline_decode(xdr, 8);
4741         if (unlikely(!p))
4742                 goto out_overflow;
4743         clp->cl_seqid = be32_to_cpup(p++);
4744         session->flags = be32_to_cpup(p);
4745
4746         /* Channel attributes */
4747         status = decode_chan_attrs(xdr, &session->fc_attrs);
4748         if (!status)
4749                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4750         return status;
4751 out_overflow:
4752         print_overflow_msg(__func__, xdr);
4753         return -EIO;
4754 }
4755
4756 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4757 {
4758         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4759 }
4760
4761 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4762 {
4763         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4764 }
4765 #endif /* CONFIG_NFS_V4_1 */
4766
4767 static int decode_sequence(struct xdr_stream *xdr,
4768                            struct nfs4_sequence_res *res,
4769                            struct rpc_rqst *rqstp)
4770 {
4771 #if defined(CONFIG_NFS_V4_1)
4772         struct nfs4_sessionid id;
4773         u32 dummy;
4774         int status;
4775         __be32 *p;
4776
4777         if (!res->sr_session)
4778                 return 0;
4779
4780         status = decode_op_hdr(xdr, OP_SEQUENCE);
4781         if (!status)
4782                 status = decode_sessionid(xdr, &id);
4783         if (unlikely(status))
4784                 goto out_err;
4785
4786         /*
4787          * If the server returns different values for sessionID, slotID or
4788          * sequence number, the server is looney tunes.
4789          */
4790         status = -EREMOTEIO;
4791
4792         if (memcmp(id.data, res->sr_session->sess_id.data,
4793                    NFS4_MAX_SESSIONID_LEN)) {
4794                 dprintk("%s Invalid session id\n", __func__);
4795                 goto out_err;
4796         }
4797
4798         p = xdr_inline_decode(xdr, 20);
4799         if (unlikely(!p))
4800                 goto out_overflow;
4801
4802         /* seqid */
4803         dummy = be32_to_cpup(p++);
4804         if (dummy != res->sr_slot->seq_nr) {
4805                 dprintk("%s Invalid sequence number\n", __func__);
4806                 goto out_err;
4807         }
4808         /* slot id */
4809         dummy = be32_to_cpup(p++);
4810         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4811                 dprintk("%s Invalid slot id\n", __func__);
4812                 goto out_err;
4813         }
4814         /* highest slot id - currently not processed */
4815         dummy = be32_to_cpup(p++);
4816         /* target highest slot id - currently not processed */
4817         dummy = be32_to_cpup(p++);
4818         /* result flags */
4819         res->sr_status_flags = be32_to_cpup(p);
4820         status = 0;
4821 out_err:
4822         res->sr_status = status;
4823         return status;
4824 out_overflow:
4825         print_overflow_msg(__func__, xdr);
4826         status = -EIO;
4827         goto out_err;
4828 #else  /* CONFIG_NFS_V4_1 */
4829         return 0;
4830 #endif /* CONFIG_NFS_V4_1 */
4831 }
4832
4833 /*
4834  * END OF "GENERIC" DECODE ROUTINES.
4835  */
4836
4837 /*
4838  * Decode OPEN_DOWNGRADE response
4839  */
4840 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4841 {
4842         struct xdr_stream xdr;
4843         struct compound_hdr hdr;
4844         int status;
4845
4846         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4847         status = decode_compound_hdr(&xdr, &hdr);
4848         if (status)
4849                 goto out;
4850         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4851         if (status)
4852                 goto out;
4853         status = decode_putfh(&xdr);
4854         if (status)
4855                 goto out;
4856         status = decode_open_downgrade(&xdr, res);
4857         if (status != 0)
4858                 goto out;
4859         decode_getfattr(&xdr, res->fattr, res->server,
4860                         !RPC_IS_ASYNC(rqstp->rq_task));
4861 out:
4862         return status;
4863 }
4864
4865 /*
4866  * Decode ACCESS response
4867  */
4868 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *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         status = decode_putfh(&xdr);
4882         if (status != 0)
4883                 goto out;
4884         status = decode_access(&xdr, res);
4885         if (status != 0)
4886                 goto out;
4887         decode_getfattr(&xdr, res->fattr, res->server,
4888                         !RPC_IS_ASYNC(rqstp->rq_task));
4889 out:
4890         return status;
4891 }
4892
4893 /*
4894  * Decode LOOKUP response
4895  */
4896 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4897 {
4898         struct xdr_stream xdr;
4899         struct compound_hdr hdr;
4900         int status;
4901
4902         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4903         status = decode_compound_hdr(&xdr, &hdr);
4904         if (status)
4905                 goto out;
4906         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4907         if (status)
4908                 goto out;
4909         if ((status = decode_putfh(&xdr)) != 0)
4910                 goto out;
4911         if ((status = decode_lookup(&xdr)) != 0)
4912                 goto out;
4913         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4914                 goto out;
4915         status = decode_getfattr(&xdr, res->fattr, res->server
4916                         ,!RPC_IS_ASYNC(rqstp->rq_task));
4917 out:
4918         return status;
4919 }
4920
4921 /*
4922  * Decode LOOKUP_ROOT response
4923  */
4924 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4925 {
4926         struct xdr_stream xdr;
4927         struct compound_hdr hdr;
4928         int status;
4929
4930         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4931         status = decode_compound_hdr(&xdr, &hdr);
4932         if (status)
4933                 goto out;
4934         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4935         if (status)
4936                 goto out;
4937         if ((status = decode_putrootfh(&xdr)) != 0)
4938                 goto out;
4939         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4940                 status = decode_getfattr(&xdr, res->fattr, res->server,
4941                                 !RPC_IS_ASYNC(rqstp->rq_task));
4942 out:
4943         return status;
4944 }
4945
4946 /*
4947  * Decode REMOVE response
4948  */
4949 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4950 {
4951         struct xdr_stream xdr;
4952         struct compound_hdr hdr;
4953         int status;
4954
4955         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4956         status = decode_compound_hdr(&xdr, &hdr);
4957         if (status)
4958                 goto out;
4959         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4960         if (status)
4961                 goto out;
4962         if ((status = decode_putfh(&xdr)) != 0)
4963                 goto out;
4964         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4965                 goto out;
4966         decode_getfattr(&xdr, res->dir_attr, res->server,
4967                         !RPC_IS_ASYNC(rqstp->rq_task));
4968 out:
4969         return status;
4970 }
4971
4972 /*
4973  * Decode RENAME response
4974  */
4975 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
4976 {
4977         struct xdr_stream xdr;
4978         struct compound_hdr hdr;
4979         int status;
4980
4981         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4982         status = decode_compound_hdr(&xdr, &hdr);
4983         if (status)
4984                 goto out;
4985         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4986         if (status)
4987                 goto out;
4988         if ((status = decode_putfh(&xdr)) != 0)
4989                 goto out;
4990         if ((status = decode_savefh(&xdr)) != 0)
4991                 goto out;
4992         if ((status = decode_putfh(&xdr)) != 0)
4993                 goto out;
4994         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4995                 goto out;
4996         /* Current FH is target directory */
4997         if (decode_getfattr(&xdr, res->new_fattr, res->server,
4998                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
4999                 goto out;
5000         if ((status = decode_restorefh(&xdr)) != 0)
5001                 goto out;
5002         decode_getfattr(&xdr, res->old_fattr, res->server,
5003                         !RPC_IS_ASYNC(rqstp->rq_task));
5004 out:
5005         return status;
5006 }
5007
5008 /*
5009  * Decode LINK response
5010  */
5011 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
5012 {
5013         struct xdr_stream xdr;
5014         struct compound_hdr hdr;
5015         int status;
5016
5017         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5018         status = decode_compound_hdr(&xdr, &hdr);
5019         if (status)
5020                 goto out;
5021         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5022         if (status)
5023                 goto out;
5024         if ((status = decode_putfh(&xdr)) != 0)
5025                 goto out;
5026         if ((status = decode_savefh(&xdr)) != 0)
5027                 goto out;
5028         if ((status = decode_putfh(&xdr)) != 0)
5029                 goto out;
5030         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
5031                 goto out;
5032         /*
5033          * Note order: OP_LINK leaves the directory as the current
5034          *             filehandle.
5035          */
5036         if (decode_getfattr(&xdr, res->dir_attr, res->server,
5037                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5038                 goto out;
5039         if ((status = decode_restorefh(&xdr)) != 0)
5040                 goto out;
5041         decode_getfattr(&xdr, res->fattr, res->server,
5042                         !RPC_IS_ASYNC(rqstp->rq_task));
5043 out:
5044         return status;
5045 }
5046
5047 /*
5048  * Decode CREATE response
5049  */
5050 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
5051 {
5052         struct xdr_stream xdr;
5053         struct compound_hdr hdr;
5054         int status;
5055
5056         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5057         status = decode_compound_hdr(&xdr, &hdr);
5058         if (status)
5059                 goto out;
5060         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5061         if (status)
5062                 goto out;
5063         if ((status = decode_putfh(&xdr)) != 0)
5064                 goto out;
5065         if ((status = decode_savefh(&xdr)) != 0)
5066                 goto out;
5067         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
5068                 goto out;
5069         if ((status = decode_getfh(&xdr, res->fh)) != 0)
5070                 goto out;
5071         if (decode_getfattr(&xdr, res->fattr, res->server,
5072                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5073                 goto out;
5074         if ((status = decode_restorefh(&xdr)) != 0)
5075                 goto out;
5076         decode_getfattr(&xdr, res->dir_fattr, res->server,
5077                         !RPC_IS_ASYNC(rqstp->rq_task));
5078 out:
5079         return status;
5080 }
5081
5082 /*
5083  * Decode SYMLINK response
5084  */
5085 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
5086 {
5087         return nfs4_xdr_dec_create(rqstp, p, res);
5088 }
5089
5090 /*
5091  * Decode GETATTR response
5092  */
5093 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
5094 {
5095         struct xdr_stream xdr;
5096         struct compound_hdr hdr;
5097         int status;
5098
5099         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5100         status = decode_compound_hdr(&xdr, &hdr);
5101         if (status)
5102                 goto out;
5103         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5104         if (status)
5105                 goto out;
5106         status = decode_putfh(&xdr);
5107         if (status)
5108                 goto out;
5109         status = decode_getfattr(&xdr, res->fattr, res->server,
5110                         !RPC_IS_ASYNC(rqstp->rq_task));
5111 out:
5112         return status;
5113 }
5114
5115 /*
5116  * Encode an SETACL request
5117  */
5118 static int
5119 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
5120 {
5121         struct xdr_stream xdr;
5122         struct compound_hdr hdr = {
5123                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5124         };
5125         int status;
5126
5127         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
5128         encode_compound_hdr(&xdr, req, &hdr);
5129         encode_sequence(&xdr, &args->seq_args, &hdr);
5130         encode_putfh(&xdr, args->fh, &hdr);
5131         status = encode_setacl(&xdr, args, &hdr);
5132         encode_nops(&hdr);
5133         return status;
5134 }
5135
5136 /*
5137  * Decode SETACL response
5138  */
5139 static int
5140 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
5141                     struct nfs_setaclres *res)
5142 {
5143         struct xdr_stream xdr;
5144         struct compound_hdr hdr;
5145         int status;
5146
5147         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5148         status = decode_compound_hdr(&xdr, &hdr);
5149         if (status)
5150                 goto out;
5151         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5152         if (status)
5153                 goto out;
5154         status = decode_putfh(&xdr);
5155         if (status)
5156                 goto out;
5157         status = decode_setattr(&xdr);
5158 out:
5159         return status;
5160 }
5161
5162 /*
5163  * Decode GETACL response
5164  */
5165 static int
5166 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
5167                     struct nfs_getaclres *res)
5168 {
5169         struct xdr_stream xdr;
5170         struct compound_hdr hdr;
5171         int status;
5172
5173         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5174         status = decode_compound_hdr(&xdr, &hdr);
5175         if (status)
5176                 goto out;
5177         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5178         if (status)
5179                 goto out;
5180         status = decode_putfh(&xdr);
5181         if (status)
5182                 goto out;
5183         status = decode_getacl(&xdr, rqstp, &res->acl_len);
5184
5185 out:
5186         return status;
5187 }
5188
5189 /*
5190  * Decode CLOSE response
5191  */
5192 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
5193 {
5194         struct xdr_stream xdr;
5195         struct compound_hdr hdr;
5196         int status;
5197
5198         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5199         status = decode_compound_hdr(&xdr, &hdr);
5200         if (status)
5201                 goto out;
5202         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5203         if (status)
5204                 goto out;
5205         status = decode_putfh(&xdr);
5206         if (status)
5207                 goto out;
5208         status = decode_close(&xdr, res);
5209         if (status != 0)
5210                 goto out;
5211         /*
5212          * Note: Server may do delete on close for this file
5213          *      in which case the getattr call will fail with
5214          *      an ESTALE error. Shouldn't be a problem,
5215          *      though, since fattr->valid will remain unset.
5216          */
5217         decode_getfattr(&xdr, res->fattr, res->server,
5218                         !RPC_IS_ASYNC(rqstp->rq_task));
5219 out:
5220         return status;
5221 }
5222
5223 /*
5224  * Decode OPEN response
5225  */
5226 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5227 {
5228         struct xdr_stream xdr;
5229         struct compound_hdr hdr;
5230         int status;
5231
5232         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5233         status = decode_compound_hdr(&xdr, &hdr);
5234         if (status)
5235                 goto out;
5236         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5237         if (status)
5238                 goto out;
5239         status = decode_putfh(&xdr);
5240         if (status)
5241                 goto out;
5242         status = decode_savefh(&xdr);
5243         if (status)
5244                 goto out;
5245         status = decode_open(&xdr, res);
5246         if (status)
5247                 goto out;
5248         if (decode_getfh(&xdr, &res->fh) != 0)
5249                 goto out;
5250         if (decode_getfattr(&xdr, res->f_attr, res->server,
5251                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5252                 goto out;
5253         if (decode_restorefh(&xdr) != 0)
5254                 goto out;
5255         decode_getfattr(&xdr, res->dir_attr, res->server,
5256                         !RPC_IS_ASYNC(rqstp->rq_task));
5257 out:
5258         return status;
5259 }
5260
5261 /*
5262  * Decode OPEN_CONFIRM response
5263  */
5264 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
5265 {
5266         struct xdr_stream xdr;
5267         struct compound_hdr hdr;
5268         int status;
5269
5270         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5271         status = decode_compound_hdr(&xdr, &hdr);
5272         if (status)
5273                 goto out;
5274         status = decode_putfh(&xdr);
5275         if (status)
5276                 goto out;
5277         status = decode_open_confirm(&xdr, res);
5278 out:
5279         return status;
5280 }
5281
5282 /*
5283  * Decode OPEN response
5284  */
5285 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
5286 {
5287         struct xdr_stream xdr;
5288         struct compound_hdr hdr;
5289         int status;
5290
5291         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5292         status = decode_compound_hdr(&xdr, &hdr);
5293         if (status)
5294                 goto out;
5295         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5296         if (status)
5297                 goto out;
5298         status = decode_putfh(&xdr);
5299         if (status)
5300                 goto out;
5301         status = decode_open(&xdr, res);
5302         if (status)
5303                 goto out;
5304         decode_getfattr(&xdr, res->f_attr, res->server,
5305                         !RPC_IS_ASYNC(rqstp->rq_task));
5306 out:
5307         return status;
5308 }
5309
5310 /*
5311  * Decode SETATTR response
5312  */
5313 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
5314 {
5315         struct xdr_stream xdr;
5316         struct compound_hdr hdr;
5317         int status;
5318
5319         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5320         status = decode_compound_hdr(&xdr, &hdr);
5321         if (status)
5322                 goto out;
5323         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5324         if (status)
5325                 goto out;
5326         status = decode_putfh(&xdr);
5327         if (status)
5328                 goto out;
5329         status = decode_setattr(&xdr);
5330         if (status)
5331                 goto out;
5332         decode_getfattr(&xdr, res->fattr, res->server,
5333                         !RPC_IS_ASYNC(rqstp->rq_task));
5334 out:
5335         return status;
5336 }
5337
5338 /*
5339  * Decode LOCK response
5340  */
5341 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
5342 {
5343         struct xdr_stream xdr;
5344         struct compound_hdr hdr;
5345         int status;
5346
5347         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5348         status = decode_compound_hdr(&xdr, &hdr);
5349         if (status)
5350                 goto out;
5351         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5352         if (status)
5353                 goto out;
5354         status = decode_putfh(&xdr);
5355         if (status)
5356                 goto out;
5357         status = decode_lock(&xdr, res);
5358 out:
5359         return status;
5360 }
5361
5362 /*
5363  * Decode LOCKT response
5364  */
5365 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
5366 {
5367         struct xdr_stream xdr;
5368         struct compound_hdr hdr;
5369         int status;
5370
5371         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5372         status = decode_compound_hdr(&xdr, &hdr);
5373         if (status)
5374                 goto out;
5375         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5376         if (status)
5377                 goto out;
5378         status = decode_putfh(&xdr);
5379         if (status)
5380                 goto out;
5381         status = decode_lockt(&xdr, res);
5382 out:
5383         return status;
5384 }
5385
5386 /*
5387  * Decode LOCKU response
5388  */
5389 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
5390 {
5391         struct xdr_stream xdr;
5392         struct compound_hdr hdr;
5393         int status;
5394
5395         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5396         status = decode_compound_hdr(&xdr, &hdr);
5397         if (status)
5398                 goto out;
5399         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5400         if (status)
5401                 goto out;
5402         status = decode_putfh(&xdr);
5403         if (status)
5404                 goto out;
5405         status = decode_locku(&xdr, res);
5406 out:
5407         return status;
5408 }
5409
5410 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5411 {
5412         struct xdr_stream xdr;
5413         struct compound_hdr hdr;
5414         int status;
5415
5416         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5417         status = decode_compound_hdr(&xdr, &hdr);
5418         if (!status)
5419                 status = decode_release_lockowner(&xdr);
5420         return status;
5421 }
5422
5423 /*
5424  * Decode READLINK response
5425  */
5426 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
5427                                  struct nfs4_readlink_res *res)
5428 {
5429         struct xdr_stream xdr;
5430         struct compound_hdr hdr;
5431         int status;
5432
5433         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5434         status = decode_compound_hdr(&xdr, &hdr);
5435         if (status)
5436                 goto out;
5437         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5438         if (status)
5439                 goto out;
5440         status = decode_putfh(&xdr);
5441         if (status)
5442                 goto out;
5443         status = decode_readlink(&xdr, rqstp);
5444 out:
5445         return status;
5446 }
5447
5448 /*
5449  * Decode READDIR response
5450  */
5451 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
5452 {
5453         struct xdr_stream xdr;
5454         struct compound_hdr hdr;
5455         int status;
5456
5457         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5458         status = decode_compound_hdr(&xdr, &hdr);
5459         if (status)
5460                 goto out;
5461         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5462         if (status)
5463                 goto out;
5464         status = decode_putfh(&xdr);
5465         if (status)
5466                 goto out;
5467         status = decode_readdir(&xdr, rqstp, res);
5468 out:
5469         return status;
5470 }
5471
5472 /*
5473  * Decode Read response
5474  */
5475 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
5476 {
5477         struct xdr_stream xdr;
5478         struct compound_hdr hdr;
5479         int status;
5480
5481         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5482         status = decode_compound_hdr(&xdr, &hdr);
5483         if (status)
5484                 goto out;
5485         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5486         if (status)
5487                 goto out;
5488         status = decode_putfh(&xdr);
5489         if (status)
5490                 goto out;
5491         status = decode_read(&xdr, rqstp, res);
5492         if (!status)
5493                 status = res->count;
5494 out:
5495         return status;
5496 }
5497
5498 /*
5499  * Decode WRITE response
5500  */
5501 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5502 {
5503         struct xdr_stream xdr;
5504         struct compound_hdr hdr;
5505         int status;
5506
5507         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5508         status = decode_compound_hdr(&xdr, &hdr);
5509         if (status)
5510                 goto out;
5511         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5512         if (status)
5513                 goto out;
5514         status = decode_putfh(&xdr);
5515         if (status)
5516                 goto out;
5517         status = decode_write(&xdr, res);
5518         if (status)
5519                 goto out;
5520         decode_getfattr(&xdr, res->fattr, res->server,
5521                         !RPC_IS_ASYNC(rqstp->rq_task));
5522         if (!status)
5523                 status = res->count;
5524 out:
5525         return status;
5526 }
5527
5528 /*
5529  * Decode COMMIT response
5530  */
5531 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
5532 {
5533         struct xdr_stream xdr;
5534         struct compound_hdr hdr;
5535         int status;
5536
5537         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5538         status = decode_compound_hdr(&xdr, &hdr);
5539         if (status)
5540                 goto out;
5541         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5542         if (status)
5543                 goto out;
5544         status = decode_putfh(&xdr);
5545         if (status)
5546                 goto out;
5547         status = decode_commit(&xdr, res);
5548         if (status)
5549                 goto out;
5550         decode_getfattr(&xdr, res->fattr, res->server,
5551                         !RPC_IS_ASYNC(rqstp->rq_task));
5552 out:
5553         return status;
5554 }
5555
5556 /*
5557  * Decode FSINFO response
5558  */
5559 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
5560                                struct nfs4_fsinfo_res *res)
5561 {
5562         struct xdr_stream xdr;
5563         struct compound_hdr hdr;
5564         int status;
5565
5566         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5567         status = decode_compound_hdr(&xdr, &hdr);
5568         if (!status)
5569                 status = decode_sequence(&xdr, &res->seq_res, req);
5570         if (!status)
5571                 status = decode_putfh(&xdr);
5572         if (!status)
5573                 status = decode_fsinfo(&xdr, res->fsinfo);
5574         return status;
5575 }
5576
5577 /*
5578  * Decode PATHCONF response
5579  */
5580 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
5581                                  struct nfs4_pathconf_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_sequence(&xdr, &res->seq_res, req);
5591         if (!status)
5592                 status = decode_putfh(&xdr);
5593         if (!status)
5594                 status = decode_pathconf(&xdr, res->pathconf);
5595         return status;
5596 }
5597
5598 /*
5599  * Decode STATFS response
5600  */
5601 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
5602                                struct nfs4_statfs_res *res)
5603 {
5604         struct xdr_stream xdr;
5605         struct compound_hdr hdr;
5606         int status;
5607
5608         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5609         status = decode_compound_hdr(&xdr, &hdr);
5610         if (!status)
5611                 status = decode_sequence(&xdr, &res->seq_res, req);
5612         if (!status)
5613                 status = decode_putfh(&xdr);
5614         if (!status)
5615                 status = decode_statfs(&xdr, res->fsstat);
5616         return status;
5617 }
5618
5619 /*
5620  * Decode GETATTR_BITMAP response
5621  */
5622 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
5623 {
5624         struct xdr_stream xdr;
5625         struct compound_hdr hdr;
5626         int status;
5627
5628         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5629         status = decode_compound_hdr(&xdr, &hdr);
5630         if (status)
5631                 goto out;
5632         status = decode_sequence(&xdr, &res->seq_res, req);
5633         if (status)
5634                 goto out;
5635         if ((status = decode_putfh(&xdr)) != 0)
5636                 goto out;
5637         status = decode_server_caps(&xdr, res);
5638 out:
5639         return status;
5640 }
5641
5642 /*
5643  * Decode RENEW response
5644  */
5645 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
5646 {
5647         struct xdr_stream xdr;
5648         struct compound_hdr hdr;
5649         int status;
5650
5651         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5652         status = decode_compound_hdr(&xdr, &hdr);
5653         if (!status)
5654                 status = decode_renew(&xdr);
5655         return status;
5656 }
5657
5658 /*
5659  * Decode SETCLIENTID response
5660  */
5661 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
5662                 struct nfs4_setclientid_res *res)
5663 {
5664         struct xdr_stream xdr;
5665         struct compound_hdr hdr;
5666         int status;
5667
5668         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5669         status = decode_compound_hdr(&xdr, &hdr);
5670         if (!status)
5671                 status = decode_setclientid(&xdr, res);
5672         return status;
5673 }
5674
5675 /*
5676  * Decode SETCLIENTID_CONFIRM response
5677  */
5678 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
5679 {
5680         struct xdr_stream xdr;
5681         struct compound_hdr hdr;
5682         int status;
5683
5684         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5685         status = decode_compound_hdr(&xdr, &hdr);
5686         if (!status)
5687                 status = decode_setclientid_confirm(&xdr);
5688         if (!status)
5689                 status = decode_putrootfh(&xdr);
5690         if (!status)
5691                 status = decode_fsinfo(&xdr, fsinfo);
5692         return status;
5693 }
5694
5695 /*
5696  * Decode DELEGRETURN response
5697  */
5698 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
5699 {
5700         struct xdr_stream xdr;
5701         struct compound_hdr hdr;
5702         int status;
5703
5704         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5705         status = decode_compound_hdr(&xdr, &hdr);
5706         if (status)
5707                 goto out;
5708         status = decode_sequence(&xdr, &res->seq_res, rqstp);
5709         if (status)
5710                 goto out;
5711         status = decode_putfh(&xdr);
5712         if (status != 0)
5713                 goto out;
5714         status = decode_delegreturn(&xdr);
5715         if (status != 0)
5716                 goto out;
5717         decode_getfattr(&xdr, res->fattr, res->server,
5718                         !RPC_IS_ASYNC(rqstp->rq_task));
5719 out:
5720         return status;
5721 }
5722
5723 /*
5724  * Decode FS_LOCATIONS response
5725  */
5726 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
5727                                      struct nfs4_fs_locations_res *res)
5728 {
5729         struct xdr_stream xdr;
5730         struct compound_hdr hdr;
5731         int status;
5732
5733         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
5734         status = decode_compound_hdr(&xdr, &hdr);
5735         if (status)
5736                 goto out;
5737         status = decode_sequence(&xdr, &res->seq_res, req);
5738         if (status)
5739                 goto out;
5740         if ((status = decode_putfh(&xdr)) != 0)
5741                 goto out;
5742         if ((status = decode_lookup(&xdr)) != 0)
5743                 goto out;
5744         xdr_enter_page(&xdr, PAGE_SIZE);
5745         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
5746                                  res->fs_locations->server,
5747                                  !RPC_IS_ASYNC(req->rq_task));
5748 out:
5749         return status;
5750 }
5751
5752 #if defined(CONFIG_NFS_V4_1)
5753 /*
5754  * Decode EXCHANGE_ID response
5755  */
5756 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
5757                                     void *res)
5758 {
5759         struct xdr_stream xdr;
5760         struct compound_hdr hdr;
5761         int status;
5762
5763         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5764         status = decode_compound_hdr(&xdr, &hdr);
5765         if (!status)
5766                 status = decode_exchange_id(&xdr, res);
5767         return status;
5768 }
5769
5770 /*
5771  * Decode CREATE_SESSION response
5772  */
5773 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p,
5774                                        struct nfs41_create_session_res *res)
5775 {
5776         struct xdr_stream xdr;
5777         struct compound_hdr hdr;
5778         int status;
5779
5780         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5781         status = decode_compound_hdr(&xdr, &hdr);
5782         if (!status)
5783                 status = decode_create_session(&xdr, res);
5784         return status;
5785 }
5786
5787 /*
5788  * Decode DESTROY_SESSION response
5789  */
5790 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p,
5791                                         void *dummy)
5792 {
5793         struct xdr_stream xdr;
5794         struct compound_hdr hdr;
5795         int status;
5796
5797         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5798         status = decode_compound_hdr(&xdr, &hdr);
5799         if (!status)
5800                 status = decode_destroy_session(&xdr, dummy);
5801         return status;
5802 }
5803
5804 /*
5805  * Decode SEQUENCE response
5806  */
5807 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p,
5808                                  struct nfs4_sequence_res *res)
5809 {
5810         struct xdr_stream xdr;
5811         struct compound_hdr hdr;
5812         int status;
5813
5814         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5815         status = decode_compound_hdr(&xdr, &hdr);
5816         if (!status)
5817                 status = decode_sequence(&xdr, res, rqstp);
5818         return status;
5819 }
5820
5821 /*
5822  * Decode GET_LEASE_TIME response
5823  */
5824 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p,
5825                                        struct nfs4_get_lease_time_res *res)
5826 {
5827         struct xdr_stream xdr;
5828         struct compound_hdr hdr;
5829         int status;
5830
5831         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5832         status = decode_compound_hdr(&xdr, &hdr);
5833         if (!status)
5834                 status = decode_sequence(&xdr, &res->lr_seq_res, rqstp);
5835         if (!status)
5836                 status = decode_putrootfh(&xdr);
5837         if (!status)
5838                 status = decode_fsinfo(&xdr, res->lr_fsinfo);
5839         return status;
5840 }
5841
5842 /*
5843  * Decode RECLAIM_COMPLETE response
5844  */
5845 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p,
5846                                          struct nfs41_reclaim_complete_res *res)
5847 {
5848         struct xdr_stream xdr;
5849         struct compound_hdr hdr;
5850         int status;
5851
5852         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
5853         status = decode_compound_hdr(&xdr, &hdr);
5854         if (!status)
5855                 status = decode_sequence(&xdr, &res->seq_res, rqstp);
5856         if (!status)
5857                 status = decode_reclaim_complete(&xdr, (void *)NULL);
5858         return status;
5859 }
5860 #endif /* CONFIG_NFS_V4_1 */
5861
5862 __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
5863                            struct nfs_server *server, int plus)
5864 {
5865         uint32_t bitmap[2] = {0};
5866         uint32_t len;
5867         __be32 *p = xdr_inline_decode(xdr, 4);
5868         if (unlikely(!p))
5869                 goto out_overflow;
5870         if (!ntohl(*p++)) {
5871                 p = xdr_inline_decode(xdr, 4);
5872                 if (unlikely(!p))
5873                         goto out_overflow;
5874                 if (!ntohl(*p++))
5875                         return ERR_PTR(-EAGAIN);
5876                 entry->eof = 1;
5877                 return ERR_PTR(-EBADCOOKIE);
5878         }
5879
5880         p = xdr_inline_decode(xdr, 12);
5881         if (unlikely(!p))
5882                 goto out_overflow;
5883         entry->prev_cookie = entry->cookie;
5884         p = xdr_decode_hyper(p, &entry->cookie);
5885         entry->len = ntohl(*p++);
5886
5887         p = xdr_inline_decode(xdr, entry->len);
5888         if (unlikely(!p))
5889                 goto out_overflow;
5890         entry->name = (const char *) p;
5891
5892         /*
5893          * In case the server doesn't return an inode number,
5894          * we fake one here.  (We don't use inode number 0,
5895          * since glibc seems to choke on it...)
5896          */
5897         entry->ino = 1;
5898         entry->fattr->valid = 0;
5899
5900         if (decode_attr_bitmap(xdr, bitmap) < 0)
5901                 goto out_overflow;
5902
5903         if (decode_attr_length(xdr, &len, &p) < 0)
5904                 goto out_overflow;
5905
5906         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
5907                 goto out_overflow;
5908         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
5909                 entry->ino = entry->fattr->fileid;
5910
5911         if (verify_attr_len(xdr, p, len) < 0)
5912                 goto out_overflow;
5913
5914         p = xdr_inline_peek(xdr, 8);
5915         if (p != NULL)
5916                 entry->eof = !p[0] && p[1];
5917         else
5918                 entry->eof = 0;
5919
5920         return p;
5921
5922 out_overflow:
5923         print_overflow_msg(__func__, xdr);
5924         return ERR_PTR(-EIO);
5925 }
5926
5927 /*
5928  * We need to translate between nfs status return values and
5929  * the local errno values which may not be the same.
5930  */
5931 static struct {
5932         int stat;
5933         int errno;
5934 } nfs_errtbl[] = {
5935         { NFS4_OK,              0               },
5936         { NFS4ERR_PERM,         -EPERM          },
5937         { NFS4ERR_NOENT,        -ENOENT         },
5938         { NFS4ERR_IO,           -errno_NFSERR_IO},
5939         { NFS4ERR_NXIO,         -ENXIO          },
5940         { NFS4ERR_ACCESS,       -EACCES         },
5941         { NFS4ERR_EXIST,        -EEXIST         },
5942         { NFS4ERR_XDEV,         -EXDEV          },
5943         { NFS4ERR_NOTDIR,       -ENOTDIR        },
5944         { NFS4ERR_ISDIR,        -EISDIR         },
5945         { NFS4ERR_INVAL,        -EINVAL         },
5946         { NFS4ERR_FBIG,         -EFBIG          },
5947         { NFS4ERR_NOSPC,        -ENOSPC         },
5948         { NFS4ERR_ROFS,         -EROFS          },
5949         { NFS4ERR_MLINK,        -EMLINK         },
5950         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
5951         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
5952         { NFS4ERR_DQUOT,        -EDQUOT         },
5953         { NFS4ERR_STALE,        -ESTALE         },
5954         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
5955         { NFS4ERR_BADOWNER,     -EINVAL         },
5956         { NFS4ERR_BADNAME,      -EINVAL         },
5957         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
5958         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
5959         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
5960         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
5961         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5962         { NFS4ERR_LOCKED,       -EAGAIN         },
5963         { NFS4ERR_SYMLINK,      -ELOOP          },
5964         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5965         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5966         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5967                                                     * to be handled by a
5968                                                     * middle-layer.
5969                                                     */
5970         { -1,                   -EIO            }
5971 };
5972
5973 /*
5974  * Convert an NFS error code to a local one.
5975  * This one is used jointly by NFSv2 and NFSv3.
5976  */
5977 static int
5978 nfs4_stat_to_errno(int stat)
5979 {
5980         int i;
5981         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5982                 if (nfs_errtbl[i].stat == stat)
5983                         return nfs_errtbl[i].errno;
5984         }
5985         if (stat <= 10000 || stat > 10100) {
5986                 /* The server is looney tunes. */
5987                 return -EREMOTEIO;
5988         }
5989         /* If we cannot translate the error, the recovery routines should
5990          * handle it.
5991          * Note: remaining NFSv4 error codes have values > 10000, so should
5992          * not conflict with native Linux error codes.
5993          */
5994         return -stat;
5995 }
5996
5997 #define PROC(proc, argtype, restype)                            \
5998 [NFSPROC4_CLNT_##proc] = {                                      \
5999         .p_proc   = NFSPROC4_COMPOUND,                          \
6000         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
6001         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
6002         .p_arglen = NFS4_##argtype##_sz,                        \
6003         .p_replen = NFS4_##restype##_sz,                        \
6004         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6005         .p_name   = #proc,                                      \
6006 }
6007
6008 struct rpc_procinfo     nfs4_procedures[] = {
6009   PROC(READ,            enc_read,       dec_read),
6010   PROC(WRITE,           enc_write,      dec_write),
6011   PROC(COMMIT,          enc_commit,     dec_commit),
6012   PROC(OPEN,            enc_open,       dec_open),
6013   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
6014   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
6015   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
6016   PROC(CLOSE,           enc_close,      dec_close),
6017   PROC(SETATTR,         enc_setattr,    dec_setattr),
6018   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
6019   PROC(RENEW,           enc_renew,      dec_renew),
6020   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
6021   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
6022   PROC(LOCK,            enc_lock,       dec_lock),
6023   PROC(LOCKT,           enc_lockt,      dec_lockt),
6024   PROC(LOCKU,           enc_locku,      dec_locku),
6025   PROC(ACCESS,          enc_access,     dec_access),
6026   PROC(GETATTR,         enc_getattr,    dec_getattr),
6027   PROC(LOOKUP,          enc_lookup,     dec_lookup),
6028   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
6029   PROC(REMOVE,          enc_remove,     dec_remove),
6030   PROC(RENAME,          enc_rename,     dec_rename),
6031   PROC(LINK,            enc_link,       dec_link),
6032   PROC(SYMLINK,         enc_symlink,    dec_symlink),
6033   PROC(CREATE,          enc_create,     dec_create),
6034   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
6035   PROC(STATFS,          enc_statfs,     dec_statfs),
6036   PROC(READLINK,        enc_readlink,   dec_readlink),
6037   PROC(READDIR,         enc_readdir,    dec_readdir),
6038   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
6039   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
6040   PROC(GETACL,          enc_getacl,     dec_getacl),
6041   PROC(SETACL,          enc_setacl,     dec_setacl),
6042   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
6043   PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
6044 #if defined(CONFIG_NFS_V4_1)
6045   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
6046   PROC(CREATE_SESSION,  enc_create_session,     dec_create_session),
6047   PROC(DESTROY_SESSION, enc_destroy_session,    dec_destroy_session),
6048   PROC(SEQUENCE,        enc_sequence,   dec_sequence),
6049   PROC(GET_LEASE_TIME,  enc_get_lease_time,     dec_get_lease_time),
6050   PROC(RECLAIM_COMPLETE, enc_reclaim_complete,  dec_reclaim_complete),
6051 #endif /* CONFIG_NFS_V4_1 */
6052 };
6053
6054 struct rpc_version              nfs_version4 = {
6055         .number                 = 4,
6056         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6057         .procs                  = nfs4_procedures
6058 };
6059
6060 /*
6061  * Local variables:
6062  *  c-basic-offset: 8
6063  * End:
6064  */