SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/slab.h>
  42 #include <linux/utsname.h>
  43 #include <linux/errno.h>
  44 #include <linux/string.h>
  45 #include <linux/in.h>
  46 #include <linux/pagemap.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/kdev_t.h>
  49 #include <linux/sunrpc/clnt.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55
  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)
 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_lock_maxsz       (op_encode_hdr_maxsz + \
 206                                  7 + \
 207                                  1 + encode_stateid_maxsz + 8)
 208 #define decode_lock_denied_maxsz \
 209                                 (8 + decode_lockowner_maxsz)
 210 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 211                                  decode_lock_denied_maxsz)
 212 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 12)
 213 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 216                                  encode_stateid_maxsz + \
 217                                  4)
 218 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_stateid_maxsz)
 220 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 221 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 222 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 223                                 1 + nfs4_name_maxsz + \
 224                                 1 + \
 225                                 nfs4_fattr_maxsz)
 226 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 227 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 228                                 1 + 2 + nfs4_name_maxsz + \
 229                                 encode_attrs_maxsz)
 230 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 231                                 decode_change_info_maxsz + \
 232                                 nfs4_fattr_bitmap_maxsz)
 233 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 234 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 235 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 236 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 237 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 238 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 239                                  nfs4_fattr_bitmap_maxsz + 1)
 240 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 241                                  encode_stateid_maxsz + 3)
 242 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 243 #define encode_fs_locations_maxsz \
 244                                 (encode_getattr_maxsz)
 245 #define decode_fs_locations_maxsz \
 246                                 (0)
 247
 248 #if defined(CONFIG_NFS_V4_1)
 249 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 250                                 encode_verifier_maxsz + \
 251                                 1 /* co_ownerid.len */ + \
 252                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 253                                 1 /* flags */ + \
 254                                 1 /* spa_how */ + \
 255                                 0 /* SP4_NONE (for now) */ + \
 256                                 1 /* zero implemetation id array */)
 257 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 258                                 2 /* eir_clientid */ + \
 259                                 1 /* eir_sequenceid */ + \
 260                                 1 /* eir_flags */ + \
 261                                 1 /* spr_how */ + \
 262                                 0 /* SP4_NONE (for now) */ + \
 263                                 2 /* eir_server_owner.so_minor_id */ + \
 264                                 /* eir_server_owner.so_major_id<> */ \
 265                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 266                                 /* eir_server_scope<> */ \
 267                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 268                                 1 /* eir_server_impl_id array length */ + \
 269                                 0 /* ignored eir_server_impl_id contents */)
 270 #define encode_sequence_maxsz   0 /* stub */
 271 #define decode_sequence_maxsz   0 /* stub */
 272 #else /* CONFIG_NFS_V4_1 */
 273 #define encode_sequence_maxsz   0
 274 #define decode_sequence_maxsz   0
 275 #endif /* CONFIG_NFS_V4_1 */
 276
 277 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 278 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 279 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 280                                 encode_sequence_maxsz + \
 281                                 encode_putfh_maxsz + \
 282                                 encode_read_maxsz)
 283 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 284                                 decode_sequence_maxsz + \
 285                                 decode_putfh_maxsz + \
 286                                 decode_read_maxsz)
 287 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 288                                 encode_sequence_maxsz + \
 289                                 encode_putfh_maxsz + \
 290                                 encode_readlink_maxsz)
 291 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 292                                 decode_sequence_maxsz + \
 293                                 decode_putfh_maxsz + \
 294                                 decode_readlink_maxsz)
 295 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 296                                 encode_sequence_maxsz + \
 297                                 encode_putfh_maxsz + \
 298                                 encode_readdir_maxsz)
 299 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 300                                 decode_sequence_maxsz + \
 301                                 decode_putfh_maxsz + \
 302                                 decode_readdir_maxsz)
 303 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 304                                 encode_sequence_maxsz + \
 305                                 encode_putfh_maxsz + \
 306                                 encode_write_maxsz + \
 307                                 encode_getattr_maxsz)
 308 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 309                                 decode_sequence_maxsz + \
 310                                 decode_putfh_maxsz + \
 311                                 decode_write_maxsz + \
 312                                 decode_getattr_maxsz)
 313 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 314                                 encode_sequence_maxsz + \
 315                                 encode_putfh_maxsz + \
 316                                 encode_commit_maxsz + \
 317                                 encode_getattr_maxsz)
 318 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 319                                 decode_sequence_maxsz + \
 320                                 decode_putfh_maxsz + \
 321                                 decode_commit_maxsz + \
 322                                 decode_getattr_maxsz)
 323 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 324                                 encode_sequence_maxsz + \
 325                                 encode_putfh_maxsz + \
 326                                 encode_savefh_maxsz + \
 327                                 encode_open_maxsz + \
 328                                 encode_getfh_maxsz + \
 329                                 encode_getattr_maxsz + \
 330                                 encode_restorefh_maxsz + \
 331                                 encode_getattr_maxsz)
 332 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 333                                 decode_sequence_maxsz + \
 334                                 decode_putfh_maxsz + \
 335                                 decode_savefh_maxsz + \
 336                                 decode_open_maxsz + \
 337                                 decode_getfh_maxsz + \
 338                                 decode_getattr_maxsz + \
 339                                 decode_restorefh_maxsz + \
 340                                 decode_getattr_maxsz)
 341 #define NFS4_enc_open_confirm_sz \
 342                                 (compound_encode_hdr_maxsz + \
 343                                  encode_putfh_maxsz + \
 344                                  encode_open_confirm_maxsz)
 345 #define NFS4_dec_open_confirm_sz \
 346                                 (compound_decode_hdr_maxsz + \
 347                                  decode_putfh_maxsz + \
 348                                  decode_open_confirm_maxsz)
 349 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 350                                         encode_sequence_maxsz + \
 351                                         encode_putfh_maxsz + \
 352                                         encode_open_maxsz + \
 353                                         encode_getattr_maxsz)
 354 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 355                                         decode_sequence_maxsz + \
 356                                         decode_putfh_maxsz + \
 357                                         decode_open_maxsz + \
 358                                         decode_getattr_maxsz)
 359 #define NFS4_enc_open_downgrade_sz \
 360                                 (compound_encode_hdr_maxsz + \
 361                                  encode_sequence_maxsz + \
 362                                  encode_putfh_maxsz + \
 363                                  encode_open_downgrade_maxsz + \
 364                                  encode_getattr_maxsz)
 365 #define NFS4_dec_open_downgrade_sz \
 366                                 (compound_decode_hdr_maxsz + \
 367                                  decode_sequence_maxsz + \
 368                                  decode_putfh_maxsz + \
 369                                  decode_open_downgrade_maxsz + \
 370                                  decode_getattr_maxsz)
 371 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 372                                  encode_sequence_maxsz + \
 373                                  encode_putfh_maxsz + \
 374                                  encode_close_maxsz + \
 375                                  encode_getattr_maxsz)
 376 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 377                                  decode_sequence_maxsz + \
 378                                  decode_putfh_maxsz + \
 379                                  decode_close_maxsz + \
 380                                  decode_getattr_maxsz)
 381 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 382                                  encode_sequence_maxsz + \
 383                                  encode_putfh_maxsz + \
 384                                  encode_setattr_maxsz + \
 385                                  encode_getattr_maxsz)
 386 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 387                                  decode_sequence_maxsz + \
 388                                  decode_putfh_maxsz + \
 389                                  decode_setattr_maxsz + \
 390                                  decode_getattr_maxsz)
 391 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 392                                 encode_sequence_maxsz + \
 393                                 encode_putfh_maxsz + \
 394                                 encode_fsinfo_maxsz)
 395 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 396                                 decode_sequence_maxsz + \
 397                                 decode_putfh_maxsz + \
 398                                 decode_fsinfo_maxsz)
 399 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 400                                 encode_renew_maxsz)
 401 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 402                                 decode_renew_maxsz)
 403 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 404                                 encode_setclientid_maxsz)
 405 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 406                                 decode_setclientid_maxsz)
 407 #define NFS4_enc_setclientid_confirm_sz \
 408                                 (compound_encode_hdr_maxsz + \
 409                                 encode_setclientid_confirm_maxsz + \
 410                                 encode_putrootfh_maxsz + \
 411                                 encode_fsinfo_maxsz)
 412 #define NFS4_dec_setclientid_confirm_sz \
 413                                 (compound_decode_hdr_maxsz + \
 414                                 decode_setclientid_confirm_maxsz + \
 415                                 decode_putrootfh_maxsz + \
 416                                 decode_fsinfo_maxsz)
 417 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 418                                 encode_sequence_maxsz + \
 419                                 encode_putfh_maxsz + \
 420                                 encode_lock_maxsz)
 421 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 422                                 decode_sequence_maxsz + \
 423                                 decode_putfh_maxsz + \
 424                                 decode_lock_maxsz)
 425 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 426                                 encode_sequence_maxsz + \
 427                                 encode_putfh_maxsz + \
 428                                 encode_lockt_maxsz)
 429 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 430                                  decode_sequence_maxsz + \
 431                                  decode_putfh_maxsz + \
 432                                  decode_lockt_maxsz)
 433 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 434                                 encode_sequence_maxsz + \
 435                                 encode_putfh_maxsz + \
 436                                 encode_locku_maxsz)
 437 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 438                                 decode_sequence_maxsz + \
 439                                 decode_putfh_maxsz + \
 440                                 decode_locku_maxsz)
 441 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 442                                 encode_sequence_maxsz + \
 443                                 encode_putfh_maxsz + \
 444                                 encode_access_maxsz + \
 445                                 encode_getattr_maxsz)
 446 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 447                                 decode_sequence_maxsz + \
 448                                 decode_putfh_maxsz + \
 449                                 decode_access_maxsz + \
 450                                 decode_getattr_maxsz)
 451 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 452                                 encode_sequence_maxsz + \
 453                                 encode_putfh_maxsz + \
 454                                 encode_getattr_maxsz)
 455 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 456                                 decode_sequence_maxsz + \
 457                                 decode_putfh_maxsz + \
 458                                 decode_getattr_maxsz)
 459 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 460                                 encode_sequence_maxsz + \
 461                                 encode_putfh_maxsz + \
 462                                 encode_lookup_maxsz + \
 463                                 encode_getattr_maxsz + \
 464                                 encode_getfh_maxsz)
 465 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_lookup_maxsz + \
 469                                 decode_getattr_maxsz + \
 470                                 decode_getfh_maxsz)
 471 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 472                                 encode_sequence_maxsz + \
 473                                 encode_putrootfh_maxsz + \
 474                                 encode_getattr_maxsz + \
 475                                 encode_getfh_maxsz)
 476 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putrootfh_maxsz + \
 479                                 decode_getattr_maxsz + \
 480                                 decode_getfh_maxsz)
 481 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 482                                 encode_sequence_maxsz + \
 483                                 encode_putfh_maxsz + \
 484                                 encode_remove_maxsz + \
 485                                 encode_getattr_maxsz)
 486 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 487                                 decode_sequence_maxsz + \
 488                                 decode_putfh_maxsz + \
 489                                 decode_remove_maxsz + \
 490                                 decode_getattr_maxsz)
 491 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 492                                 encode_sequence_maxsz + \
 493                                 encode_putfh_maxsz + \
 494                                 encode_savefh_maxsz + \
 495                                 encode_putfh_maxsz + \
 496                                 encode_rename_maxsz + \
 497                                 encode_getattr_maxsz + \
 498                                 encode_restorefh_maxsz + \
 499                                 encode_getattr_maxsz)
 500 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 501                                 decode_sequence_maxsz + \
 502                                 decode_putfh_maxsz + \
 503                                 decode_savefh_maxsz + \
 504                                 decode_putfh_maxsz + \
 505                                 decode_rename_maxsz + \
 506                                 decode_getattr_maxsz + \
 507                                 decode_restorefh_maxsz + \
 508                                 decode_getattr_maxsz)
 509 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 510                                 encode_sequence_maxsz + \
 511                                 encode_putfh_maxsz + \
 512                                 encode_savefh_maxsz + \
 513                                 encode_putfh_maxsz + \
 514                                 encode_link_maxsz + \
 515                                 decode_getattr_maxsz + \
 516                                 encode_restorefh_maxsz + \
 517                                 decode_getattr_maxsz)
 518 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 519                                 decode_sequence_maxsz + \
 520                                 decode_putfh_maxsz + \
 521                                 decode_savefh_maxsz + \
 522                                 decode_putfh_maxsz + \
 523                                 decode_link_maxsz + \
 524                                 decode_getattr_maxsz + \
 525                                 decode_restorefh_maxsz + \
 526                                 decode_getattr_maxsz)
 527 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 528                                 encode_sequence_maxsz + \
 529                                 encode_putfh_maxsz + \
 530                                 encode_symlink_maxsz + \
 531                                 encode_getattr_maxsz + \
 532                                 encode_getfh_maxsz)
 533 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 534                                 decode_sequence_maxsz + \
 535                                 decode_putfh_maxsz + \
 536                                 decode_symlink_maxsz + \
 537                                 decode_getattr_maxsz + \
 538                                 decode_getfh_maxsz)
 539 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 540                                 encode_sequence_maxsz + \
 541                                 encode_putfh_maxsz + \
 542                                 encode_savefh_maxsz + \
 543                                 encode_create_maxsz + \
 544                                 encode_getfh_maxsz + \
 545                                 encode_getattr_maxsz + \
 546                                 encode_restorefh_maxsz + \
 547                                 encode_getattr_maxsz)
 548 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 549                                 decode_sequence_maxsz + \
 550                                 decode_putfh_maxsz + \
 551                                 decode_savefh_maxsz + \
 552                                 decode_create_maxsz + \
 553                                 decode_getfh_maxsz + \
 554                                 decode_getattr_maxsz + \
 555                                 decode_restorefh_maxsz + \
 556                                 decode_getattr_maxsz)
 557 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_getattr_maxsz)
 561 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_getattr_maxsz)
 565 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 566                                 encode_sequence_maxsz + \
 567                                 encode_putfh_maxsz + \
 568                                 encode_statfs_maxsz)
 569 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 570                                 decode_sequence_maxsz + \
 571                                 decode_putfh_maxsz + \
 572                                 decode_statfs_maxsz)
 573 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 574                                 encode_sequence_maxsz + \
 575                                 encode_putfh_maxsz + \
 576                                 encode_getattr_maxsz)
 577 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 578                                 decode_sequence_maxsz + \
 579                                 decode_putfh_maxsz + \
 580                                 decode_getattr_maxsz)
 581 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 582                                 encode_sequence_maxsz + \
 583                                 encode_putfh_maxsz + \
 584                                 encode_delegreturn_maxsz + \
 585                                 encode_getattr_maxsz)
 586 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 587                                 decode_sequence_maxsz + \
 588                                 decode_delegreturn_maxsz + \
 589                                 decode_getattr_maxsz)
 590 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 591                                 encode_sequence_maxsz + \
 592                                 encode_putfh_maxsz + \
 593                                 encode_getacl_maxsz)
 594 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_getacl_maxsz)
 598 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 599                                 encode_sequence_maxsz + \
 600                                 encode_putfh_maxsz + \
 601                                 encode_setacl_maxsz)
 602 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 603                                 decode_sequence_maxsz + \
 604                                 decode_putfh_maxsz + \
 605                                 decode_setacl_maxsz)
 606 #define NFS4_enc_fs_locations_sz \
 607                                 (compound_encode_hdr_maxsz + \
 608                                  encode_sequence_maxsz + \
 609                                  encode_putfh_maxsz + \
 610                                  encode_lookup_maxsz + \
 611                                  encode_fs_locations_maxsz)
 612 #define NFS4_dec_fs_locations_sz \
 613                                 (compound_decode_hdr_maxsz + \
 614                                  decode_sequence_maxsz + \
 615                                  decode_putfh_maxsz + \
 616                                  decode_lookup_maxsz + \
 617                                  decode_fs_locations_maxsz)
 618 #if defined(CONFIG_NFS_V4_1)
 619 #define NFS4_enc_exchange_id_sz \
 620                                 (compound_encode_hdr_maxsz + \
 621                                  encode_exchange_id_maxsz)
 622 #define NFS4_dec_exchange_id_sz \
 623                                 (compound_decode_hdr_maxsz + \
 624                                  decode_exchange_id_maxsz)
 625 #endif /* CONFIG_NFS_V4_1 */
 626
 627 static const umode_t nfs_type2fmt[] = {
 628         [NF4BAD] = 0,
 629         [NF4REG] = S_IFREG,
 630         [NF4DIR] = S_IFDIR,
 631         [NF4BLK] = S_IFBLK,
 632         [NF4CHR] = S_IFCHR,
 633         [NF4LNK] = S_IFLNK,
 634         [NF4SOCK] = S_IFSOCK,
 635         [NF4FIFO] = S_IFIFO,
 636         [NF4ATTRDIR] = 0,
 637         [NF4NAMEDATTR] = 0,
 638 };
 639
 640 struct compound_hdr {
 641         int32_t         status;
 642         uint32_t        nops;
 643         __be32 *        nops_p;
 644         uint32_t        taglen;
 645         char *          tag;
 646         uint32_t        replen;         /* expected reply words */
 647         u32             minorversion;
 648 };
 649
 650 /*
 651  * START OF "GENERIC" ENCODE ROUTINES.
 652  *   These may look a little ugly since they are imported from a "generic"
 653  * set of XDR encode/decode routines which are intended to be shared by
 654  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
 655  *
 656  * If the pain of reading these is too great, it should be a straightforward
 657  * task to translate them into Linux-specific versions which are more
 658  * consistent with the style used in NFSv2/v3...
 659  */
 660 #define WRITE32(n)               *p++ = htonl(n)
 661 #define WRITE64(n)               do {                           \
 662         *p++ = htonl((uint32_t)((n) >> 32));                            \
 663         *p++ = htonl((uint32_t)(n));                                    \
 664 } while (0)
 665 #define WRITEMEM(ptr,nbytes)     do {                           \
 666         p = xdr_encode_opaque_fixed(p, ptr, nbytes);            \
 667 } while (0)
 668
 669 #define RESERVE_SPACE(nbytes)   do {                            \
 670         p = xdr_reserve_space(xdr, nbytes);                     \
 671         BUG_ON(!p);                                             \
 672 } while (0)
 673
 674 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 675 {
 676         __be32 *p;
 677
 678         p = xdr_reserve_space(xdr, 4 + len);
 679         BUG_ON(p == NULL);
 680         xdr_encode_opaque(p, str, len);
 681 }
 682
 683 static void encode_compound_hdr(struct xdr_stream *xdr,
 684                                 struct rpc_rqst *req,
 685                                 struct compound_hdr *hdr)
 686 {
 687         __be32 *p;
 688         struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 689
 690         /* initialize running count of expected bytes in reply.
 691          * NOTE: the replied tag SHOULD be the same is the one sent,
 692          * but this is not required as a MUST for the server to do so. */
 693         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 694
 695         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 696         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 697         RESERVE_SPACE(12+(XDR_QUADLEN(hdr->taglen)<<2));
 698         WRITE32(hdr->taglen);
 699         WRITEMEM(hdr->tag, hdr->taglen);
 700         WRITE32(hdr->minorversion);
 701         hdr->nops_p = p;
 702         WRITE32(hdr->nops);
 703 }
 704
 705 static void encode_nops(struct compound_hdr *hdr)
 706 {
 707         *hdr->nops_p = htonl(hdr->nops);
 708 }
 709
 710 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 711 {
 712         __be32 *p;
 713
 714         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 715         BUG_ON(p == NULL);
 716         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 717 }
 718
 719 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 720 {
 721         char owner_name[IDMAP_NAMESZ];
 722         char owner_group[IDMAP_NAMESZ];
 723         int owner_namelen = 0;
 724         int owner_grouplen = 0;
 725         __be32 *p;
 726         __be32 *q;
 727         int len;
 728         uint32_t bmval0 = 0;
 729         uint32_t bmval1 = 0;
 730
 731         /*
 732          * We reserve enough space to write the entire attribute buffer at once.
 733          * In the worst-case, this would be
 734          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 735          *          = 36 bytes, plus any contribution from variable-length fields
 736          *            such as owner/group.
 737          */
 738         len = 16;
 739
 740         /* Sigh */
 741         if (iap->ia_valid & ATTR_SIZE)
 742                 len += 8;
 743         if (iap->ia_valid & ATTR_MODE)
 744                 len += 4;
 745         if (iap->ia_valid & ATTR_UID) {
 746                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
 747                 if (owner_namelen < 0) {
 748                         dprintk("nfs: couldn't resolve uid %d to string\n",
 749                                         iap->ia_uid);
 750                         /* XXX */
 751                         strcpy(owner_name, "nobody");
 752                         owner_namelen = sizeof("nobody") - 1;
 753                         /* goto out; */
 754                 }
 755                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 756         }
 757         if (iap->ia_valid & ATTR_GID) {
 758                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
 759                 if (owner_grouplen < 0) {
 760                         dprintk("nfs: couldn't resolve gid %d to string\n",
 761                                         iap->ia_gid);
 762                         strcpy(owner_group, "nobody");
 763                         owner_grouplen = sizeof("nobody") - 1;
 764                         /* goto out; */
 765                 }
 766                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 767         }
 768         if (iap->ia_valid & ATTR_ATIME_SET)
 769                 len += 16;
 770         else if (iap->ia_valid & ATTR_ATIME)
 771                 len += 4;
 772         if (iap->ia_valid & ATTR_MTIME_SET)
 773                 len += 16;
 774         else if (iap->ia_valid & ATTR_MTIME)
 775                 len += 4;
 776         RESERVE_SPACE(len);
 777
 778         /*
 779          * We write the bitmap length now, but leave the bitmap and the attribute
 780          * buffer length to be backfilled at the end of this routine.
 781          */
 782         WRITE32(2);
 783         q = p;
 784         p += 3;
 785
 786         if (iap->ia_valid & ATTR_SIZE) {
 787                 bmval0 |= FATTR4_WORD0_SIZE;
 788                 WRITE64(iap->ia_size);
 789         }
 790         if (iap->ia_valid & ATTR_MODE) {
 791                 bmval1 |= FATTR4_WORD1_MODE;
 792                 WRITE32(iap->ia_mode & S_IALLUGO);
 793         }
 794         if (iap->ia_valid & ATTR_UID) {
 795                 bmval1 |= FATTR4_WORD1_OWNER;
 796                 WRITE32(owner_namelen);
 797                 WRITEMEM(owner_name, owner_namelen);
 798         }
 799         if (iap->ia_valid & ATTR_GID) {
 800                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 801                 WRITE32(owner_grouplen);
 802                 WRITEMEM(owner_group, owner_grouplen);
 803         }
 804         if (iap->ia_valid & ATTR_ATIME_SET) {
 805                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 806                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 807                 WRITE32(0);
 808                 WRITE32(iap->ia_mtime.tv_sec);
 809                 WRITE32(iap->ia_mtime.tv_nsec);
 810         }
 811         else if (iap->ia_valid & ATTR_ATIME) {
 812                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 813                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 814         }
 815         if (iap->ia_valid & ATTR_MTIME_SET) {
 816                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 817                 WRITE32(NFS4_SET_TO_CLIENT_TIME);
 818                 WRITE32(0);
 819                 WRITE32(iap->ia_mtime.tv_sec);
 820                 WRITE32(iap->ia_mtime.tv_nsec);
 821         }
 822         else if (iap->ia_valid & ATTR_MTIME) {
 823                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 824                 WRITE32(NFS4_SET_TO_SERVER_TIME);
 825         }
 826
 827         /*
 828          * Now we backfill the bitmap and the attribute buffer length.
 829          */
 830         if (len != ((char *)p - (char *)q) + 4) {
 831                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 832                                 len, ((char *)p - (char *)q) + 4);
 833                 BUG();
 834         }
 835         len = (char *)p - (char *)q - 12;
 836         *q++ = htonl(bmval0);
 837         *q++ = htonl(bmval1);
 838         *q++ = htonl(len);
 839
 840 /* out: */
 841 }
 842
 843 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 844 {
 845         __be32 *p;
 846
 847         RESERVE_SPACE(8);
 848         WRITE32(OP_ACCESS);
 849         WRITE32(access);
 850         hdr->nops++;
 851         hdr->replen += decode_access_maxsz;
 852 }
 853
 854 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 855 {
 856         __be32 *p;
 857
 858         RESERVE_SPACE(8+NFS4_STATEID_SIZE);
 859         WRITE32(OP_CLOSE);
 860         WRITE32(arg->seqid->sequence->counter);
 861         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
 862         hdr->nops++;
 863         hdr->replen += decode_close_maxsz;
 864 }
 865
 866 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 867 {
 868         __be32 *p;
 869
 870         RESERVE_SPACE(16);
 871         WRITE32(OP_COMMIT);
 872         WRITE64(args->offset);
 873         WRITE32(args->count);
 874         hdr->nops++;
 875         hdr->replen += decode_commit_maxsz;
 876 }
 877
 878 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 879 {
 880         __be32 *p;
 881
 882         RESERVE_SPACE(8);
 883         WRITE32(OP_CREATE);
 884         WRITE32(create->ftype);
 885
 886         switch (create->ftype) {
 887         case NF4LNK:
 888                 RESERVE_SPACE(4);
 889                 WRITE32(create->u.symlink.len);
 890                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 891                 break;
 892
 893         case NF4BLK: case NF4CHR:
 894                 RESERVE_SPACE(8);
 895                 WRITE32(create->u.device.specdata1);
 896                 WRITE32(create->u.device.specdata2);
 897                 break;
 898
 899         default:
 900                 break;
 901         }
 902
 903         RESERVE_SPACE(4 + create->name->len);
 904         WRITE32(create->name->len);
 905         WRITEMEM(create->name->name, create->name->len);
 906         hdr->nops++;
 907         hdr->replen += decode_create_maxsz;
 908
 909         encode_attrs(xdr, create->attrs, create->server);
 910 }
 911
 912 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
 913 {
 914         __be32 *p;
 915
 916         RESERVE_SPACE(12);
 917         WRITE32(OP_GETATTR);
 918         WRITE32(1);
 919         WRITE32(bitmap);
 920         hdr->nops++;
 921         hdr->replen += decode_getattr_maxsz;
 922 }
 923
 924 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
 925 {
 926         __be32 *p;
 927
 928         RESERVE_SPACE(16);
 929         WRITE32(OP_GETATTR);
 930         WRITE32(2);
 931         WRITE32(bm0);
 932         WRITE32(bm1);
 933         hdr->nops++;
 934         hdr->replen += decode_getattr_maxsz;
 935 }
 936
 937 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 938 {
 939         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
 940                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
 941 }
 942
 943 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 944 {
 945         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
 946                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
 947 }
 948
 949 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
 950 {
 951         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
 952                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
 953 }
 954
 955 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
 956 {
 957         __be32 *p;
 958
 959         RESERVE_SPACE(4);
 960         WRITE32(OP_GETFH);
 961         hdr->nops++;
 962         hdr->replen += decode_getfh_maxsz;
 963 }
 964
 965 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
 966 {
 967         __be32 *p;
 968
 969         RESERVE_SPACE(8 + name->len);
 970         WRITE32(OP_LINK);
 971         WRITE32(name->len);
 972         WRITEMEM(name->name, name->len);
 973         hdr->nops++;
 974         hdr->replen += decode_link_maxsz;
 975 }
 976
 977 static inline int nfs4_lock_type(struct file_lock *fl, int block)
 978 {
 979         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
 980                 return block ? NFS4_READW_LT : NFS4_READ_LT;
 981         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
 982 }
 983
 984 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
 985 {
 986         if (fl->fl_end == OFFSET_MAX)
 987                 return ~(uint64_t)0;
 988         return fl->fl_end - fl->fl_start + 1;
 989 }
 990
 991 /*
 992  * opcode,type,reclaim,offset,length,new_lock_owner = 32
 993  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 994  */
 995 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
 996 {
 997         __be32 *p;
 998
 999         RESERVE_SPACE(32);
1000         WRITE32(OP_LOCK);
1001         WRITE32(nfs4_lock_type(args->fl, args->block));
1002         WRITE32(args->reclaim);
1003         WRITE64(args->fl->fl_start);
1004         WRITE64(nfs4_lock_length(args->fl));
1005         WRITE32(args->new_lock_owner);
1006         if (args->new_lock_owner){
1007                 RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
1008                 WRITE32(args->open_seqid->sequence->counter);
1009                 WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
1010                 WRITE32(args->lock_seqid->sequence->counter);
1011                 WRITE64(args->lock_owner.clientid);
1012                 WRITE32(16);
1013                 WRITEMEM("lock id:", 8);
1014                 WRITE64(args->lock_owner.id);
1015         }
1016         else {
1017                 RESERVE_SPACE(NFS4_STATEID_SIZE+4);
1018                 WRITEMEM(args->lock_stateid->data, NFS4_STATEID_SIZE);
1019                 WRITE32(args->lock_seqid->sequence->counter);
1020         }
1021         hdr->nops++;
1022         hdr->replen += decode_lock_maxsz;
1023 }
1024
1025 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1026 {
1027         __be32 *p;
1028
1029         RESERVE_SPACE(52);
1030         WRITE32(OP_LOCKT);
1031         WRITE32(nfs4_lock_type(args->fl, 0));
1032         WRITE64(args->fl->fl_start);
1033         WRITE64(nfs4_lock_length(args->fl));
1034         WRITE64(args->lock_owner.clientid);
1035         WRITE32(16);
1036         WRITEMEM("lock id:", 8);
1037         WRITE64(args->lock_owner.id);
1038         hdr->nops++;
1039         hdr->replen += decode_lockt_maxsz;
1040 }
1041
1042 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1043 {
1044         __be32 *p;
1045
1046         RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
1047         WRITE32(OP_LOCKU);
1048         WRITE32(nfs4_lock_type(args->fl, 0));
1049         WRITE32(args->seqid->sequence->counter);
1050         WRITEMEM(args->stateid->data, NFS4_STATEID_SIZE);
1051         WRITE64(args->fl->fl_start);
1052         WRITE64(nfs4_lock_length(args->fl));
1053         hdr->nops++;
1054         hdr->replen += decode_locku_maxsz;
1055 }
1056
1057 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1058 {
1059         int len = name->len;
1060         __be32 *p;
1061
1062         RESERVE_SPACE(8 + len);
1063         WRITE32(OP_LOOKUP);
1064         WRITE32(len);
1065         WRITEMEM(name->name, len);
1066         hdr->nops++;
1067         hdr->replen += decode_lookup_maxsz;
1068 }
1069
1070 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1071 {
1072         __be32 *p;
1073
1074         RESERVE_SPACE(8);
1075         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1076         case FMODE_READ:
1077                 WRITE32(NFS4_SHARE_ACCESS_READ);
1078                 break;
1079         case FMODE_WRITE:
1080                 WRITE32(NFS4_SHARE_ACCESS_WRITE);
1081                 break;
1082         case FMODE_READ|FMODE_WRITE:
1083                 WRITE32(NFS4_SHARE_ACCESS_BOTH);
1084                 break;
1085         default:
1086                 WRITE32(0);
1087         }
1088         WRITE32(0);             /* for linux, share_deny = 0 always */
1089 }
1090
1091 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1092 {
1093         __be32 *p;
1094  /*
1095  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1096  * owner 4 = 32
1097  */
1098         RESERVE_SPACE(8);
1099         WRITE32(OP_OPEN);
1100         WRITE32(arg->seqid->sequence->counter);
1101         encode_share_access(xdr, arg->fmode);
1102         RESERVE_SPACE(28);
1103         WRITE64(arg->clientid);
1104         WRITE32(16);
1105         WRITEMEM("open id:", 8);
1106         WRITE64(arg->id);
1107 }
1108
1109 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1110 {
1111         __be32 *p;
1112
1113         RESERVE_SPACE(4);
1114         switch(arg->open_flags & O_EXCL) {
1115         case 0:
1116                 WRITE32(NFS4_CREATE_UNCHECKED);
1117                 encode_attrs(xdr, arg->u.attrs, arg->server);
1118                 break;
1119         default:
1120                 WRITE32(NFS4_CREATE_EXCLUSIVE);
1121                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1122         }
1123 }
1124
1125 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1126 {
1127         __be32 *p;
1128
1129         RESERVE_SPACE(4);
1130         switch (arg->open_flags & O_CREAT) {
1131         case 0:
1132                 WRITE32(NFS4_OPEN_NOCREATE);
1133                 break;
1134         default:
1135                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1136                 WRITE32(NFS4_OPEN_CREATE);
1137                 encode_createmode(xdr, arg);
1138         }
1139 }
1140
1141 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1142 {
1143         __be32 *p;
1144
1145         RESERVE_SPACE(4);
1146         switch (delegation_type) {
1147         case 0:
1148                 WRITE32(NFS4_OPEN_DELEGATE_NONE);
1149                 break;
1150         case FMODE_READ:
1151                 WRITE32(NFS4_OPEN_DELEGATE_READ);
1152                 break;
1153         case FMODE_WRITE|FMODE_READ:
1154                 WRITE32(NFS4_OPEN_DELEGATE_WRITE);
1155                 break;
1156         default:
1157                 BUG();
1158         }
1159 }
1160
1161 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1162 {
1163         __be32 *p;
1164
1165         RESERVE_SPACE(4);
1166         WRITE32(NFS4_OPEN_CLAIM_NULL);
1167         encode_string(xdr, name->len, name->name);
1168 }
1169
1170 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1171 {
1172         __be32 *p;
1173
1174         RESERVE_SPACE(4);
1175         WRITE32(NFS4_OPEN_CLAIM_PREVIOUS);
1176         encode_delegation_type(xdr, type);
1177 }
1178
1179 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1180 {
1181         __be32 *p;
1182
1183         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1184         WRITE32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1185         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1186         encode_string(xdr, name->len, name->name);
1187 }
1188
1189 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1190 {
1191         encode_openhdr(xdr, arg);
1192         encode_opentype(xdr, arg);
1193         switch (arg->claim) {
1194         case NFS4_OPEN_CLAIM_NULL:
1195                 encode_claim_null(xdr, arg->name);
1196                 break;
1197         case NFS4_OPEN_CLAIM_PREVIOUS:
1198                 encode_claim_previous(xdr, arg->u.delegation_type);
1199                 break;
1200         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1201                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1202                 break;
1203         default:
1204                 BUG();
1205         }
1206         hdr->nops++;
1207         hdr->replen += decode_open_maxsz;
1208 }
1209
1210 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1211 {
1212         __be32 *p;
1213
1214         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1215         WRITE32(OP_OPEN_CONFIRM);
1216         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1217         WRITE32(arg->seqid->sequence->counter);
1218         hdr->nops++;
1219         hdr->replen += decode_open_confirm_maxsz;
1220 }
1221
1222 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1223 {
1224         __be32 *p;
1225
1226         RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
1227         WRITE32(OP_OPEN_DOWNGRADE);
1228         WRITEMEM(arg->stateid->data, NFS4_STATEID_SIZE);
1229         WRITE32(arg->seqid->sequence->counter);
1230         encode_share_access(xdr, arg->fmode);
1231         hdr->nops++;
1232         hdr->replen += decode_open_downgrade_maxsz;
1233 }
1234
1235 static void
1236 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1237 {
1238         int len = fh->size;
1239         __be32 *p;
1240
1241         RESERVE_SPACE(8 + len);
1242         WRITE32(OP_PUTFH);
1243         WRITE32(len);
1244         WRITEMEM(fh->data, len);
1245         hdr->nops++;
1246         hdr->replen += decode_putfh_maxsz;
1247 }
1248
1249 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1250 {
1251         __be32 *p;
1252
1253         RESERVE_SPACE(4);
1254         WRITE32(OP_PUTROOTFH);
1255         hdr->nops++;
1256         hdr->replen += decode_putrootfh_maxsz;
1257 }
1258
1259 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
1260 {
1261         nfs4_stateid stateid;
1262         __be32 *p;
1263
1264         RESERVE_SPACE(NFS4_STATEID_SIZE);
1265         if (ctx->state != NULL) {
1266                 nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
1267                 WRITEMEM(stateid.data, NFS4_STATEID_SIZE);
1268         } else
1269                 WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1270 }
1271
1272 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1273 {
1274         __be32 *p;
1275
1276         RESERVE_SPACE(4);
1277         WRITE32(OP_READ);
1278
1279         encode_stateid(xdr, args->context);
1280
1281         RESERVE_SPACE(12);
1282         WRITE64(args->offset);
1283         WRITE32(args->count);
1284         hdr->nops++;
1285         hdr->replen += decode_read_maxsz;
1286 }
1287
1288 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1289 {
1290         uint32_t attrs[2] = {
1291                 FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
1292                 FATTR4_WORD1_MOUNTED_ON_FILEID,
1293         };
1294         __be32 *p;
1295
1296         RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
1297         WRITE32(OP_READDIR);
1298         WRITE64(readdir->cookie);
1299         WRITEMEM(readdir->verifier.data, NFS4_VERIFIER_SIZE);
1300         WRITE32(readdir->count >> 1);  /* We're not doing readdirplus */
1301         WRITE32(readdir->count);
1302         WRITE32(2);
1303         /* Switch to mounted_on_fileid if the server supports it */
1304         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1305                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1306         else
1307                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1308         WRITE32(attrs[0] & readdir->bitmask[0]);
1309         WRITE32(attrs[1] & readdir->bitmask[1]);
1310         hdr->nops++;
1311         hdr->replen += decode_readdir_maxsz;
1312         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1313                         __func__,
1314                         (unsigned long long)readdir->cookie,
1315                         ((u32 *)readdir->verifier.data)[0],
1316                         ((u32 *)readdir->verifier.data)[1],
1317                         attrs[0] & readdir->bitmask[0],
1318                         attrs[1] & readdir->bitmask[1]);
1319 }
1320
1321 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1322 {
1323         __be32 *p;
1324
1325         RESERVE_SPACE(4);
1326         WRITE32(OP_READLINK);
1327         hdr->nops++;
1328         hdr->replen += decode_readlink_maxsz;
1329 }
1330
1331 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1332 {
1333         __be32 *p;
1334
1335         RESERVE_SPACE(8 + name->len);
1336         WRITE32(OP_REMOVE);
1337         WRITE32(name->len);
1338         WRITEMEM(name->name, name->len);
1339         hdr->nops++;
1340         hdr->replen += decode_remove_maxsz;
1341 }
1342
1343 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1344 {
1345         __be32 *p;
1346
1347         RESERVE_SPACE(8 + oldname->len);
1348         WRITE32(OP_RENAME);
1349         WRITE32(oldname->len);
1350         WRITEMEM(oldname->name, oldname->len);
1351
1352         RESERVE_SPACE(4 + newname->len);
1353         WRITE32(newname->len);
1354         WRITEMEM(newname->name, newname->len);
1355         hdr->nops++;
1356         hdr->replen += decode_rename_maxsz;
1357 }
1358
1359 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1360 {
1361         __be32 *p;
1362
1363         RESERVE_SPACE(12);
1364         WRITE32(OP_RENEW);
1365         WRITE64(client_stateid->cl_clientid);
1366         hdr->nops++;
1367         hdr->replen += decode_renew_maxsz;
1368 }
1369
1370 static void
1371 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1372 {
1373         __be32 *p;
1374
1375         RESERVE_SPACE(4);
1376         WRITE32(OP_RESTOREFH);
1377         hdr->nops++;
1378         hdr->replen += decode_restorefh_maxsz;
1379 }
1380
1381 static int
1382 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1383 {
1384         __be32 *p;
1385
1386         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1387         WRITE32(OP_SETATTR);
1388         WRITEMEM(zero_stateid.data, NFS4_STATEID_SIZE);
1389         RESERVE_SPACE(2*4);
1390         WRITE32(1);
1391         WRITE32(FATTR4_WORD0_ACL);
1392         if (arg->acl_len % 4)
1393                 return -EINVAL;
1394         RESERVE_SPACE(4);
1395         WRITE32(arg->acl_len);
1396         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1397         hdr->nops++;
1398         hdr->replen += decode_setacl_maxsz;
1399         return 0;
1400 }
1401
1402 static void
1403 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1404 {
1405         __be32 *p;
1406
1407         RESERVE_SPACE(4);
1408         WRITE32(OP_SAVEFH);
1409         hdr->nops++;
1410         hdr->replen += decode_savefh_maxsz;
1411 }
1412
1413 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1414 {
1415         __be32 *p;
1416
1417         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1418         WRITE32(OP_SETATTR);
1419         WRITEMEM(arg->stateid.data, NFS4_STATEID_SIZE);
1420         hdr->nops++;
1421         hdr->replen += decode_setattr_maxsz;
1422         encode_attrs(xdr, arg->iap, server);
1423 }
1424
1425 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1426 {
1427         __be32 *p;
1428
1429         RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
1430         WRITE32(OP_SETCLIENTID);
1431         WRITEMEM(setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1432
1433         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1434         RESERVE_SPACE(4);
1435         WRITE32(setclientid->sc_prog);
1436         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1437         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1438         RESERVE_SPACE(4);
1439         WRITE32(setclientid->sc_cb_ident);
1440         hdr->nops++;
1441         hdr->replen += decode_setclientid_maxsz;
1442 }
1443
1444 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
1445 {
1446         __be32 *p;
1447
1448         RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
1449         WRITE32(OP_SETCLIENTID_CONFIRM);
1450         WRITE64(client_state->cl_clientid);
1451         WRITEMEM(client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
1452         hdr->nops++;
1453         hdr->replen += decode_setclientid_confirm_maxsz;
1454 }
1455
1456 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1457 {
1458         __be32 *p;
1459
1460         RESERVE_SPACE(4);
1461         WRITE32(OP_WRITE);
1462
1463         encode_stateid(xdr, args->context);
1464
1465         RESERVE_SPACE(16);
1466         WRITE64(args->offset);
1467         WRITE32(args->stable);
1468         WRITE32(args->count);
1469
1470         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1471         hdr->nops++;
1472         hdr->replen += decode_write_maxsz;
1473 }
1474
1475 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1476 {
1477         __be32 *p;
1478
1479         RESERVE_SPACE(4+NFS4_STATEID_SIZE);
1480
1481         WRITE32(OP_DELEGRETURN);
1482         WRITEMEM(stateid->data, NFS4_STATEID_SIZE);
1483         hdr->nops++;
1484         hdr->replen += decode_delegreturn_maxsz;
1485 }
1486
1487 #if defined(CONFIG_NFS_V4_1)
1488 /* NFSv4.1 operations */
1489 static void encode_exchange_id(struct xdr_stream *xdr,
1490                                struct nfs41_exchange_id_args *args,
1491                                struct compound_hdr *hdr)
1492 {
1493         __be32 *p;
1494
1495         RESERVE_SPACE(4 + sizeof(args->verifier->data));
1496         WRITE32(OP_EXCHANGE_ID);
1497         WRITEMEM(args->verifier->data, sizeof(args->verifier->data));
1498
1499         encode_string(xdr, args->id_len, args->id);
1500
1501         RESERVE_SPACE(12);
1502         WRITE32(args->flags);
1503         WRITE32(0);     /* zero length state_protect4_a */
1504         WRITE32(0);     /* zero length implementation id array */
1505         hdr->nops++;
1506         hdr->replen += decode_exchange_id_maxsz;
1507 }
1508 #endif /* CONFIG_NFS_V4_1 */
1509
1510 static void encode_sequence(struct xdr_stream *xdr,
1511                             const struct nfs4_sequence_args *args,
1512                             struct compound_hdr *hdr)
1513 {
1514 #if defined(CONFIG_NFS_V4_1)
1515         struct nfs4_session *session = args->sa_session;
1516
1517         if (!session)
1518                 return;
1519
1520         /* stub */
1521         hdr->nops++;
1522         hdr->replen += decode_sequence_maxsz;
1523 #endif /* CONFIG_NFS_V4_1 */
1524 }
1525
1526 /*
1527  * END OF "GENERIC" ENCODE ROUTINES.
1528  */
1529
1530 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1531 {
1532 #if defined(CONFIG_NFS_V4_1)
1533         if (args->sa_session)
1534                 return args->sa_session->clp->cl_minorversion;
1535 #endif /* CONFIG_NFS_V4_1 */
1536         return 0;
1537 }
1538
1539 /*
1540  * Encode an ACCESS request
1541  */
1542 static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
1543 {
1544         struct xdr_stream xdr;
1545         struct compound_hdr hdr = {
1546                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1547         };
1548
1549         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1550         encode_compound_hdr(&xdr, req, &hdr);
1551         encode_sequence(&xdr, &args->seq_args, &hdr);
1552         encode_putfh(&xdr, args->fh, &hdr);
1553         encode_access(&xdr, args->access, &hdr);
1554         encode_getfattr(&xdr, args->bitmask, &hdr);
1555         encode_nops(&hdr);
1556         return 0;
1557 }
1558
1559 /*
1560  * Encode LOOKUP request
1561  */
1562 static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
1563 {
1564         struct xdr_stream xdr;
1565         struct compound_hdr hdr = {
1566                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1567         };
1568
1569         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1570         encode_compound_hdr(&xdr, req, &hdr);
1571         encode_sequence(&xdr, &args->seq_args, &hdr);
1572         encode_putfh(&xdr, args->dir_fh, &hdr);
1573         encode_lookup(&xdr, args->name, &hdr);
1574         encode_getfh(&xdr, &hdr);
1575         encode_getfattr(&xdr, args->bitmask, &hdr);
1576         encode_nops(&hdr);
1577         return 0;
1578 }
1579
1580 /*
1581  * Encode LOOKUP_ROOT request
1582  */
1583 static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
1584 {
1585         struct xdr_stream xdr;
1586         struct compound_hdr hdr = {
1587                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1588         };
1589
1590         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1591         encode_compound_hdr(&xdr, req, &hdr);
1592         encode_sequence(&xdr, &args->seq_args, &hdr);
1593         encode_putrootfh(&xdr, &hdr);
1594         encode_getfh(&xdr, &hdr);
1595         encode_getfattr(&xdr, args->bitmask, &hdr);
1596         encode_nops(&hdr);
1597         return 0;
1598 }
1599
1600 /*
1601  * Encode REMOVE request
1602  */
1603 static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
1604 {
1605         struct xdr_stream xdr;
1606         struct compound_hdr hdr = {
1607                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1608         };
1609
1610         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1611         encode_compound_hdr(&xdr, req, &hdr);
1612         encode_sequence(&xdr, &args->seq_args, &hdr);
1613         encode_putfh(&xdr, args->fh, &hdr);
1614         encode_remove(&xdr, &args->name, &hdr);
1615         encode_getfattr(&xdr, args->bitmask, &hdr);
1616         encode_nops(&hdr);
1617         return 0;
1618 }
1619
1620 /*
1621  * Encode RENAME request
1622  */
1623 static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
1624 {
1625         struct xdr_stream xdr;
1626         struct compound_hdr hdr = {
1627                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1628         };
1629
1630         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1631         encode_compound_hdr(&xdr, req, &hdr);
1632         encode_sequence(&xdr, &args->seq_args, &hdr);
1633         encode_putfh(&xdr, args->old_dir, &hdr);
1634         encode_savefh(&xdr, &hdr);
1635         encode_putfh(&xdr, args->new_dir, &hdr);
1636         encode_rename(&xdr, args->old_name, args->new_name, &hdr);
1637         encode_getfattr(&xdr, args->bitmask, &hdr);
1638         encode_restorefh(&xdr, &hdr);
1639         encode_getfattr(&xdr, args->bitmask, &hdr);
1640         encode_nops(&hdr);
1641         return 0;
1642 }
1643
1644 /*
1645  * Encode LINK request
1646  */
1647 static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
1648 {
1649         struct xdr_stream xdr;
1650         struct compound_hdr hdr = {
1651                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1652         };
1653
1654         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1655         encode_compound_hdr(&xdr, req, &hdr);
1656         encode_sequence(&xdr, &args->seq_args, &hdr);
1657         encode_putfh(&xdr, args->fh, &hdr);
1658         encode_savefh(&xdr, &hdr);
1659         encode_putfh(&xdr, args->dir_fh, &hdr);
1660         encode_link(&xdr, args->name, &hdr);
1661         encode_getfattr(&xdr, args->bitmask, &hdr);
1662         encode_restorefh(&xdr, &hdr);
1663         encode_getfattr(&xdr, args->bitmask, &hdr);
1664         encode_nops(&hdr);
1665         return 0;
1666 }
1667
1668 /*
1669  * Encode CREATE request
1670  */
1671 static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1672 {
1673         struct xdr_stream xdr;
1674         struct compound_hdr hdr = {
1675                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1676         };
1677
1678         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1679         encode_compound_hdr(&xdr, req, &hdr);
1680         encode_sequence(&xdr, &args->seq_args, &hdr);
1681         encode_putfh(&xdr, args->dir_fh, &hdr);
1682         encode_savefh(&xdr, &hdr);
1683         encode_create(&xdr, args, &hdr);
1684         encode_getfh(&xdr, &hdr);
1685         encode_getfattr(&xdr, args->bitmask, &hdr);
1686         encode_restorefh(&xdr, &hdr);
1687         encode_getfattr(&xdr, args->bitmask, &hdr);
1688         encode_nops(&hdr);
1689         return 0;
1690 }
1691
1692 /*
1693  * Encode SYMLINK request
1694  */
1695 static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
1696 {
1697         return nfs4_xdr_enc_create(req, p, args);
1698 }
1699
1700 /*
1701  * Encode GETATTR request
1702  */
1703 static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
1704 {
1705         struct xdr_stream xdr;
1706         struct compound_hdr hdr = {
1707                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1708         };
1709
1710         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1711         encode_compound_hdr(&xdr, req, &hdr);
1712         encode_sequence(&xdr, &args->seq_args, &hdr);
1713         encode_putfh(&xdr, args->fh, &hdr);
1714         encode_getfattr(&xdr, args->bitmask, &hdr);
1715         encode_nops(&hdr);
1716         return 0;
1717 }
1718
1719 /*
1720  * Encode a CLOSE request
1721  */
1722 static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1723 {
1724         struct xdr_stream xdr;
1725         struct compound_hdr hdr = {
1726                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1727         };
1728
1729         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1730         encode_compound_hdr(&xdr, req, &hdr);
1731         encode_sequence(&xdr, &args->seq_args, &hdr);
1732         encode_putfh(&xdr, args->fh, &hdr);
1733         encode_close(&xdr, args, &hdr);
1734         encode_getfattr(&xdr, args->bitmask, &hdr);
1735         encode_nops(&hdr);
1736         return 0;
1737 }
1738
1739 /*
1740  * Encode an OPEN request
1741  */
1742 static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1743 {
1744         struct xdr_stream xdr;
1745         struct compound_hdr hdr = {
1746                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1747         };
1748
1749         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1750         encode_compound_hdr(&xdr, req, &hdr);
1751         encode_sequence(&xdr, &args->seq_args, &hdr);
1752         encode_putfh(&xdr, args->fh, &hdr);
1753         encode_savefh(&xdr, &hdr);
1754         encode_open(&xdr, args, &hdr);
1755         encode_getfh(&xdr, &hdr);
1756         encode_getfattr(&xdr, args->bitmask, &hdr);
1757         encode_restorefh(&xdr, &hdr);
1758         encode_getfattr(&xdr, args->bitmask, &hdr);
1759         encode_nops(&hdr);
1760         return 0;
1761 }
1762
1763 /*
1764  * Encode an OPEN_CONFIRM request
1765  */
1766 static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
1767 {
1768         struct xdr_stream xdr;
1769         struct compound_hdr hdr = {
1770                 .nops   = 0,
1771         };
1772
1773         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1774         encode_compound_hdr(&xdr, req, &hdr);
1775         encode_putfh(&xdr, args->fh, &hdr);
1776         encode_open_confirm(&xdr, args, &hdr);
1777         encode_nops(&hdr);
1778         return 0;
1779 }
1780
1781 /*
1782  * Encode an OPEN request with no attributes.
1783  */
1784 static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
1785 {
1786         struct xdr_stream xdr;
1787         struct compound_hdr hdr = {
1788                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1789         };
1790
1791         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1792         encode_compound_hdr(&xdr, req, &hdr);
1793         encode_sequence(&xdr, &args->seq_args, &hdr);
1794         encode_putfh(&xdr, args->fh, &hdr);
1795         encode_open(&xdr, args, &hdr);
1796         encode_getfattr(&xdr, args->bitmask, &hdr);
1797         encode_nops(&hdr);
1798         return 0;
1799 }
1800
1801 /*
1802  * Encode an OPEN_DOWNGRADE request
1803  */
1804 static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
1805 {
1806         struct xdr_stream xdr;
1807         struct compound_hdr hdr = {
1808                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1809         };
1810
1811         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1812         encode_compound_hdr(&xdr, req, &hdr);
1813         encode_sequence(&xdr, &args->seq_args, &hdr);
1814         encode_putfh(&xdr, args->fh, &hdr);
1815         encode_open_downgrade(&xdr, args, &hdr);
1816         encode_getfattr(&xdr, args->bitmask, &hdr);
1817         encode_nops(&hdr);
1818         return 0;
1819 }
1820
1821 /*
1822  * Encode a LOCK request
1823  */
1824 static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
1825 {
1826         struct xdr_stream xdr;
1827         struct compound_hdr hdr = {
1828                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1829         };
1830
1831         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1832         encode_compound_hdr(&xdr, req, &hdr);
1833         encode_sequence(&xdr, &args->seq_args, &hdr);
1834         encode_putfh(&xdr, args->fh, &hdr);
1835         encode_lock(&xdr, args, &hdr);
1836         encode_nops(&hdr);
1837         return 0;
1838 }
1839
1840 /*
1841  * Encode a LOCKT request
1842  */
1843 static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
1844 {
1845         struct xdr_stream xdr;
1846         struct compound_hdr hdr = {
1847                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1848         };
1849
1850         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1851         encode_compound_hdr(&xdr, req, &hdr);
1852         encode_sequence(&xdr, &args->seq_args, &hdr);
1853         encode_putfh(&xdr, args->fh, &hdr);
1854         encode_lockt(&xdr, args, &hdr);
1855         encode_nops(&hdr);
1856         return 0;
1857 }
1858
1859 /*
1860  * Encode a LOCKU request
1861  */
1862 static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
1863 {
1864         struct xdr_stream xdr;
1865         struct compound_hdr hdr = {
1866                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1867         };
1868
1869         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1870         encode_compound_hdr(&xdr, req, &hdr);
1871         encode_sequence(&xdr, &args->seq_args, &hdr);
1872         encode_putfh(&xdr, args->fh, &hdr);
1873         encode_locku(&xdr, args, &hdr);
1874         encode_nops(&hdr);
1875         return 0;
1876 }
1877
1878 /*
1879  * Encode a READLINK request
1880  */
1881 static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args)
1882 {
1883         struct xdr_stream xdr;
1884         struct compound_hdr hdr = {
1885                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1886         };
1887
1888         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1889         encode_compound_hdr(&xdr, req, &hdr);
1890         encode_sequence(&xdr, &args->seq_args, &hdr);
1891         encode_putfh(&xdr, args->fh, &hdr);
1892         encode_readlink(&xdr, args, req, &hdr);
1893
1894         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
1895                         args->pgbase, args->pglen);
1896         encode_nops(&hdr);
1897         return 0;
1898 }
1899
1900 /*
1901  * Encode a READDIR request
1902  */
1903 static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args)
1904 {
1905         struct xdr_stream xdr;
1906         struct compound_hdr hdr = {
1907                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1908         };
1909
1910         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1911         encode_compound_hdr(&xdr, req, &hdr);
1912         encode_sequence(&xdr, &args->seq_args, &hdr);
1913         encode_putfh(&xdr, args->fh, &hdr);
1914         encode_readdir(&xdr, args, req, &hdr);
1915
1916         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
1917                          args->pgbase, args->count);
1918         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
1919                         __func__, hdr.replen << 2, args->pages,
1920                         args->pgbase, args->count);
1921         encode_nops(&hdr);
1922         return 0;
1923 }
1924
1925 /*
1926  * Encode a READ request
1927  */
1928 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
1929 {
1930         struct xdr_stream xdr;
1931         struct compound_hdr hdr = {
1932                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1933         };
1934
1935         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1936         encode_compound_hdr(&xdr, req, &hdr);
1937         encode_sequence(&xdr, &args->seq_args, &hdr);
1938         encode_putfh(&xdr, args->fh, &hdr);
1939         encode_read(&xdr, args, &hdr);
1940
1941         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
1942                          args->pages, args->pgbase, args->count);
1943         req->rq_rcv_buf.flags |= XDRBUF_READ;
1944         encode_nops(&hdr);
1945         return 0;
1946 }
1947
1948 /*
1949  * Encode an SETATTR request
1950  */
1951 static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args)
1952 {
1953         struct xdr_stream xdr;
1954         struct compound_hdr hdr = {
1955                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1956         };
1957
1958         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1959         encode_compound_hdr(&xdr, req, &hdr);
1960         encode_sequence(&xdr, &args->seq_args, &hdr);
1961         encode_putfh(&xdr, args->fh, &hdr);
1962         encode_setattr(&xdr, args, args->server, &hdr);
1963         encode_getfattr(&xdr, args->bitmask, &hdr);
1964         encode_nops(&hdr);
1965         return 0;
1966 }
1967
1968 /*
1969  * Encode a GETACL request
1970  */
1971 static int
1972 nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
1973                 struct nfs_getaclargs *args)
1974 {
1975         struct xdr_stream xdr;
1976         struct compound_hdr hdr = {
1977                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1978         };
1979         uint32_t replen;
1980
1981         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1982         encode_compound_hdr(&xdr, req, &hdr);
1983         encode_sequence(&xdr, &args->seq_args, &hdr);
1984         encode_putfh(&xdr, args->fh, &hdr);
1985         replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
1986         encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
1987
1988         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
1989                 args->acl_pages, args->acl_pgbase, args->acl_len);
1990         encode_nops(&hdr);
1991         return 0;
1992 }
1993
1994 /*
1995  * Encode a WRITE request
1996  */
1997 static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
1998 {
1999         struct xdr_stream xdr;
2000         struct compound_hdr hdr = {
2001                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2002         };
2003
2004         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2005         encode_compound_hdr(&xdr, req, &hdr);
2006         encode_sequence(&xdr, &args->seq_args, &hdr);
2007         encode_putfh(&xdr, args->fh, &hdr);
2008         encode_write(&xdr, args, &hdr);
2009         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2010         encode_getfattr(&xdr, args->bitmask, &hdr);
2011         encode_nops(&hdr);
2012         return 0;
2013 }
2014
2015 /*
2016  *  a COMMIT request
2017  */
2018 static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *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_commit(&xdr, args, &hdr);
2030         encode_getfattr(&xdr, args->bitmask, &hdr);
2031         encode_nops(&hdr);
2032         return 0;
2033 }
2034
2035 /*
2036  * FSINFO request
2037  */
2038 static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *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_fsinfo(&xdr, args->bitmask, &hdr);
2050         encode_nops(&hdr);
2051         return 0;
2052 }
2053
2054 /*
2055  * a PATHCONF request
2056  */
2057 static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *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_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2069                            &hdr);
2070         encode_nops(&hdr);
2071         return 0;
2072 }
2073
2074 /*
2075  * a STATFS request
2076  */
2077 static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args)
2078 {
2079         struct xdr_stream xdr;
2080         struct compound_hdr hdr = {
2081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082         };
2083
2084         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2085         encode_compound_hdr(&xdr, req, &hdr);
2086         encode_sequence(&xdr, &args->seq_args, &hdr);
2087         encode_putfh(&xdr, args->fh, &hdr);
2088         encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2089                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2090         encode_nops(&hdr);
2091         return 0;
2092 }
2093
2094 /*
2095  * GETATTR_BITMAP request
2096  */
2097 static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p,
2098                                     struct nfs4_server_caps_arg *args)
2099 {
2100         struct xdr_stream xdr;
2101         struct compound_hdr hdr = {
2102                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2103         };
2104
2105         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2106         encode_compound_hdr(&xdr, req, &hdr);
2107         encode_sequence(&xdr, &args->seq_args, &hdr);
2108         encode_putfh(&xdr, args->fhandle, &hdr);
2109         encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2110                            FATTR4_WORD0_LINK_SUPPORT|
2111                            FATTR4_WORD0_SYMLINK_SUPPORT|
2112                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2113         encode_nops(&hdr);
2114         return 0;
2115 }
2116
2117 /*
2118  * a RENEW request
2119  */
2120 static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2121 {
2122         struct xdr_stream xdr;
2123         struct compound_hdr hdr = {
2124                 .nops   = 0,
2125         };
2126
2127         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2128         encode_compound_hdr(&xdr, req, &hdr);
2129         encode_renew(&xdr, clp, &hdr);
2130         encode_nops(&hdr);
2131         return 0;
2132 }
2133
2134 /*
2135  * a SETCLIENTID request
2136  */
2137 static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc)
2138 {
2139         struct xdr_stream xdr;
2140         struct compound_hdr hdr = {
2141                 .nops   = 0,
2142         };
2143
2144         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2145         encode_compound_hdr(&xdr, req, &hdr);
2146         encode_setclientid(&xdr, sc, &hdr);
2147         encode_nops(&hdr);
2148         return 0;
2149 }
2150
2151 /*
2152  * a SETCLIENTID_CONFIRM request
2153  */
2154 static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp)
2155 {
2156         struct xdr_stream xdr;
2157         struct compound_hdr hdr = {
2158                 .nops   = 0,
2159         };
2160         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2161
2162         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2163         encode_compound_hdr(&xdr, req, &hdr);
2164         encode_setclientid_confirm(&xdr, clp, &hdr);
2165         encode_putrootfh(&xdr, &hdr);
2166         encode_fsinfo(&xdr, lease_bitmap, &hdr);
2167         encode_nops(&hdr);
2168         return 0;
2169 }
2170
2171 /*
2172  * DELEGRETURN request
2173  */
2174 static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args)
2175 {
2176         struct xdr_stream xdr;
2177         struct compound_hdr hdr = {
2178                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2179         };
2180
2181         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2182         encode_compound_hdr(&xdr, req, &hdr);
2183         encode_sequence(&xdr, &args->seq_args, &hdr);
2184         encode_putfh(&xdr, args->fhandle, &hdr);
2185         encode_delegreturn(&xdr, args->stateid, &hdr);
2186         encode_getfattr(&xdr, args->bitmask, &hdr);
2187         encode_nops(&hdr);
2188         return 0;
2189 }
2190
2191 /*
2192  * Encode FS_LOCATIONS request
2193  */
2194 static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args)
2195 {
2196         struct xdr_stream xdr;
2197         struct compound_hdr hdr = {
2198                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2199         };
2200         uint32_t replen;
2201
2202         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2203         encode_compound_hdr(&xdr, req, &hdr);
2204         encode_sequence(&xdr, &args->seq_args, &hdr);
2205         encode_putfh(&xdr, args->dir_fh, &hdr);
2206         encode_lookup(&xdr, args->name, &hdr);
2207         replen = hdr.replen;    /* get the attribute into args->page */
2208         encode_fs_locations(&xdr, args->bitmask, &hdr);
2209
2210         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2211                         0, PAGE_SIZE);
2212         encode_nops(&hdr);
2213         return 0;
2214 }
2215
2216 #if defined(CONFIG_NFS_V4_1)
2217 /*
2218  * EXCHANGE_ID request
2219  */
2220 static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p,
2221                                     struct nfs41_exchange_id_args *args)
2222 {
2223         struct xdr_stream xdr;
2224         struct compound_hdr hdr = {
2225                 .minorversion = args->client->cl_minorversion,
2226         };
2227
2228         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
2229         encode_compound_hdr(&xdr, req, &hdr);
2230         encode_exchange_id(&xdr, args, &hdr);
2231         encode_nops(&hdr);
2232         return 0;
2233 }
2234 #endif /* CONFIG_NFS_V4_1 */
2235
2236 /*
2237  * START OF "GENERIC" DECODE ROUTINES.
2238  *   These may look a little ugly since they are imported from a "generic"
2239  * set of XDR encode/decode routines which are intended to be shared by
2240  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
2241  *
2242  * If the pain of reading these is too great, it should be a straightforward
2243  * task to translate them into Linux-specific versions which are more
2244  * consistent with the style used in NFSv2/v3...
2245  */
2246 #define READ32(x)         (x) = ntohl(*p++)
2247 #define READ64(x)         do {                  \
2248         (x) = (u64)ntohl(*p++) << 32;           \
2249         (x) |= ntohl(*p++);                     \
2250 } while (0)
2251 #define READTIME(x)       do {                  \
2252         p++;                                    \
2253         (x.tv_sec) = ntohl(*p++);               \
2254         (x.tv_nsec) = ntohl(*p++);              \
2255 } while (0)
2256 #define COPYMEM(x,nbytes) do {                  \
2257         memcpy((x), p, nbytes);                 \
2258         p += XDR_QUADLEN(nbytes);               \
2259 } while (0)
2260
2261 #define READ_BUF(nbytes)  do { \
2262         p = xdr_inline_decode(xdr, nbytes); \
2263         if (unlikely(!p)) { \
2264                 dprintk("nfs: %s: prematurely hit end of receive" \
2265                                 " buffer\n", __func__); \
2266                 dprintk("nfs: %s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
2267                                 __func__, xdr->p, nbytes, xdr->end); \
2268                 return -EIO; \
2269         } \
2270 } while (0)
2271
2272 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2273 {
2274         __be32 *p;
2275
2276         READ_BUF(4);
2277         READ32(*len);
2278         READ_BUF(*len);
2279         *string = (char *)p;
2280         return 0;
2281 }
2282
2283 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2284 {
2285         __be32 *p;
2286
2287         READ_BUF(8);
2288         READ32(hdr->status);
2289         READ32(hdr->taglen);
2290
2291         READ_BUF(hdr->taglen + 4);
2292         hdr->tag = (char *)p;
2293         p += XDR_QUADLEN(hdr->taglen);
2294         READ32(hdr->nops);
2295         if (unlikely(hdr->nops < 1))
2296                 return nfs4_stat_to_errno(hdr->status);
2297         return 0;
2298 }
2299
2300 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2301 {
2302         __be32 *p;
2303         uint32_t opnum;
2304         int32_t nfserr;
2305
2306         READ_BUF(8);
2307         READ32(opnum);
2308         if (opnum != expected) {
2309                 dprintk("nfs: Server returned operation"
2310                         " %d but we issued a request for %d\n",
2311                                 opnum, expected);
2312                 return -EIO;
2313         }
2314         READ32(nfserr);
2315         if (nfserr != NFS_OK)
2316                 return nfs4_stat_to_errno(nfserr);
2317         return 0;
2318 }
2319
2320 /* Dummy routine */
2321 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2322 {
2323         __be32 *p;
2324         unsigned int strlen;
2325         char *str;
2326
2327         READ_BUF(12);
2328         return decode_opaque_inline(xdr, &strlen, &str);
2329 }
2330
2331 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2332 {
2333         uint32_t bmlen;
2334         __be32 *p;
2335
2336         READ_BUF(4);
2337         READ32(bmlen);
2338
2339         bitmap[0] = bitmap[1] = 0;
2340         READ_BUF((bmlen << 2));
2341         if (bmlen > 0) {
2342                 READ32(bitmap[0]);
2343                 if (bmlen > 1)
2344                         READ32(bitmap[1]);
2345         }
2346         return 0;
2347 }
2348
2349 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2350 {
2351         __be32 *p;
2352
2353         READ_BUF(4);
2354         READ32(*attrlen);
2355         *savep = xdr->p;
2356         return 0;
2357 }
2358
2359 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2360 {
2361         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2362                 decode_attr_bitmap(xdr, bitmask);
2363                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2364         } else
2365                 bitmask[0] = bitmask[1] = 0;
2366         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2367         return 0;
2368 }
2369
2370 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2371 {
2372         __be32 *p;
2373         int ret = 0;
2374
2375         *type = 0;
2376         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2377                 return -EIO;
2378         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2379                 READ_BUF(4);
2380                 READ32(*type);
2381                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2382                         dprintk("%s: bad type %d\n", __func__, *type);
2383                         return -EIO;
2384                 }
2385                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2386                 ret = NFS_ATTR_FATTR_TYPE;
2387         }
2388         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2389         return ret;
2390 }
2391
2392 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2393 {
2394         __be32 *p;
2395         int ret = 0;
2396
2397         *change = 0;
2398         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2399                 return -EIO;
2400         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2401                 READ_BUF(8);
2402                 READ64(*change);
2403                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2404                 ret = NFS_ATTR_FATTR_CHANGE;
2405         }
2406         dprintk("%s: change attribute=%Lu\n", __func__,
2407                         (unsigned long long)*change);
2408         return ret;
2409 }
2410
2411 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2412 {
2413         __be32 *p;
2414         int ret = 0;
2415
2416         *size = 0;
2417         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2418                 return -EIO;
2419         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2420                 READ_BUF(8);
2421                 READ64(*size);
2422                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2423                 ret = NFS_ATTR_FATTR_SIZE;
2424         }
2425         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2426         return ret;
2427 }
2428
2429 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2430 {
2431         __be32 *p;
2432
2433         *res = 0;
2434         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2435                 return -EIO;
2436         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2437                 READ_BUF(4);
2438                 READ32(*res);
2439                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2440         }
2441         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2442         return 0;
2443 }
2444
2445 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2446 {
2447         __be32 *p;
2448
2449         *res = 0;
2450         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2451                 return -EIO;
2452         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2453                 READ_BUF(4);
2454                 READ32(*res);
2455                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2456         }
2457         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2458         return 0;
2459 }
2460
2461 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2462 {
2463         __be32 *p;
2464         int ret = 0;
2465
2466         fsid->major = 0;
2467         fsid->minor = 0;
2468         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2469                 return -EIO;
2470         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2471                 READ_BUF(16);
2472                 READ64(fsid->major);
2473                 READ64(fsid->minor);
2474                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2475                 ret = NFS_ATTR_FATTR_FSID;
2476         }
2477         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2478                         (unsigned long long)fsid->major,
2479                         (unsigned long long)fsid->minor);
2480         return ret;
2481 }
2482
2483 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2484 {
2485         __be32 *p;
2486
2487         *res = 60;
2488         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2489                 return -EIO;
2490         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2491                 READ_BUF(4);
2492                 READ32(*res);
2493                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2494         }
2495         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2496         return 0;
2497 }
2498
2499 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2500 {
2501         __be32 *p;
2502
2503         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2504         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2505                 return -EIO;
2506         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2507                 READ_BUF(4);
2508                 READ32(*res);
2509                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2510         }
2511         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2512         return 0;
2513 }
2514
2515 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2516 {
2517         __be32 *p;
2518         int ret = 0;
2519
2520         *fileid = 0;
2521         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2522                 return -EIO;
2523         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2524                 READ_BUF(8);
2525                 READ64(*fileid);
2526                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2527                 ret = NFS_ATTR_FATTR_FILEID;
2528         }
2529         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2530         return ret;
2531 }
2532
2533 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2534 {
2535         __be32 *p;
2536         int ret = 0;
2537
2538         *fileid = 0;
2539         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
2540                 return -EIO;
2541         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
2542                 READ_BUF(8);
2543                 READ64(*fileid);
2544                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
2545                 ret = NFS_ATTR_FATTR_FILEID;
2546         }
2547         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
2548         return ret;
2549 }
2550
2551 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2552 {
2553         __be32 *p;
2554         int status = 0;
2555
2556         *res = 0;
2557         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
2558                 return -EIO;
2559         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
2560                 READ_BUF(8);
2561                 READ64(*res);
2562                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
2563         }
2564         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
2565         return status;
2566 }
2567
2568 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2569 {
2570         __be32 *p;
2571         int status = 0;
2572
2573         *res = 0;
2574         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
2575                 return -EIO;
2576         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
2577                 READ_BUF(8);
2578                 READ64(*res);
2579                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
2580         }
2581         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
2582         return status;
2583 }
2584
2585 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2586 {
2587         __be32 *p;
2588         int status = 0;
2589
2590         *res = 0;
2591         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
2592                 return -EIO;
2593         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
2594                 READ_BUF(8);
2595                 READ64(*res);
2596                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
2597         }
2598         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
2599         return status;
2600 }
2601
2602 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
2603 {
2604         u32 n;
2605         __be32 *p;
2606         int status = 0;
2607
2608         READ_BUF(4);
2609         READ32(n);
2610         if (n == 0)
2611                 goto root_path;
2612         dprintk("path ");
2613         path->ncomponents = 0;
2614         while (path->ncomponents < n) {
2615                 struct nfs4_string *component = &path->components[path->ncomponents];
2616                 status = decode_opaque_inline(xdr, &component->len, &component->data);
2617                 if (unlikely(status != 0))
2618                         goto out_eio;
2619                 if (path->ncomponents != n)
2620                         dprintk("/");
2621                 dprintk("%s", component->data);
2622                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
2623                         path->ncomponents++;
2624                 else {
2625                         dprintk("cannot parse %d components in path\n", n);
2626                         goto out_eio;
2627                 }
2628         }
2629 out:
2630         dprintk("\n");
2631         return status;
2632 root_path:
2633 /* a root pathname is sent as a zero component4 */
2634         path->ncomponents = 1;
2635         path->components[0].len=0;
2636         path->components[0].data=NULL;
2637         dprintk("path /\n");
2638         goto out;
2639 out_eio:
2640         dprintk(" status %d", status);
2641         status = -EIO;
2642         goto out;
2643 }
2644
2645 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
2646 {
2647         int n;
2648         __be32 *p;
2649         int status = -EIO;
2650
2651         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
2652                 goto out;
2653         status = 0;
2654         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
2655                 goto out;
2656         dprintk("%s: fsroot ", __func__);
2657         status = decode_pathname(xdr, &res->fs_path);
2658         if (unlikely(status != 0))
2659                 goto out;
2660         READ_BUF(4);
2661         READ32(n);
2662         if (n <= 0)
2663                 goto out_eio;
2664         res->nlocations = 0;
2665         while (res->nlocations < n) {
2666                 u32 m;
2667                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
2668
2669                 READ_BUF(4);
2670                 READ32(m);
2671
2672                 loc->nservers = 0;
2673                 dprintk("%s: servers ", __func__);
2674                 while (loc->nservers < m) {
2675                         struct nfs4_string *server = &loc->servers[loc->nservers];
2676                         status = decode_opaque_inline(xdr, &server->len, &server->data);
2677                         if (unlikely(status != 0))
2678                                 goto out_eio;
2679                         dprintk("%s ", server->data);
2680                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
2681                                 loc->nservers++;
2682                         else {
2683                                 unsigned int i;
2684                                 dprintk("%s: using first %u of %u servers "
2685                                         "returned for location %u\n",
2686                                                 __func__,
2687                                                 NFS4_FS_LOCATION_MAXSERVERS,
2688                                                 m, res->nlocations);
2689                                 for (i = loc->nservers; i < m; i++) {
2690                                         unsigned int len;
2691                                         char *data;
2692                                         status = decode_opaque_inline(xdr, &len, &data);
2693                                         if (unlikely(status != 0))
2694                                                 goto out_eio;
2695                                 }
2696                         }
2697                 }
2698                 status = decode_pathname(xdr, &loc->rootpath);
2699                 if (unlikely(status != 0))
2700                         goto out_eio;
2701                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
2702                         res->nlocations++;
2703         }
2704         if (res->nlocations != 0)
2705                 status = NFS_ATTR_FATTR_V4_REFERRAL;
2706 out:
2707         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
2708         return status;
2709 out_eio:
2710         status = -EIO;
2711         goto out;
2712 }
2713
2714 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2715 {
2716         __be32 *p;
2717         int status = 0;
2718
2719         *res = 0;
2720         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
2721                 return -EIO;
2722         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
2723                 READ_BUF(8);
2724                 READ64(*res);
2725                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
2726         }
2727         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
2728         return status;
2729 }
2730
2731 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
2732 {
2733         __be32 *p;
2734         int status = 0;
2735
2736         *maxlink = 1;
2737         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
2738                 return -EIO;
2739         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
2740                 READ_BUF(4);
2741                 READ32(*maxlink);
2742                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
2743         }
2744         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
2745         return status;
2746 }
2747
2748 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
2749 {
2750         __be32 *p;
2751         int status = 0;
2752
2753         *maxname = 1024;
2754         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
2755                 return -EIO;
2756         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
2757                 READ_BUF(4);
2758                 READ32(*maxname);
2759                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
2760         }
2761         dprintk("%s: maxname=%u\n", __func__, *maxname);
2762         return status;
2763 }
2764
2765 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2766 {
2767         __be32 *p;
2768         int status = 0;
2769
2770         *res = 1024;
2771         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
2772                 return -EIO;
2773         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
2774                 uint64_t maxread;
2775                 READ_BUF(8);
2776                 READ64(maxread);
2777                 if (maxread > 0x7FFFFFFF)
2778                         maxread = 0x7FFFFFFF;
2779                 *res = (uint32_t)maxread;
2780                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
2781         }
2782         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
2783         return status;
2784 }
2785
2786 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2787 {
2788         __be32 *p;
2789         int status = 0;
2790
2791         *res = 1024;
2792         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
2793                 return -EIO;
2794         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
2795                 uint64_t maxwrite;
2796                 READ_BUF(8);
2797                 READ64(maxwrite);
2798                 if (maxwrite > 0x7FFFFFFF)
2799                         maxwrite = 0x7FFFFFFF;
2800                 *res = (uint32_t)maxwrite;
2801                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
2802         }
2803         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
2804         return status;
2805 }
2806
2807 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
2808 {
2809         uint32_t tmp;
2810         __be32 *p;
2811         int ret = 0;
2812
2813         *mode = 0;
2814         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
2815                 return -EIO;
2816         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
2817                 READ_BUF(4);
2818                 READ32(tmp);
2819                 *mode = tmp & ~S_IFMT;
2820                 bitmap[1] &= ~FATTR4_WORD1_MODE;
2821                 ret = NFS_ATTR_FATTR_MODE;
2822         }
2823         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
2824         return ret;
2825 }
2826
2827 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
2828 {
2829         __be32 *p;
2830         int ret = 0;
2831
2832         *nlink = 1;
2833         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
2834                 return -EIO;
2835         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
2836                 READ_BUF(4);
2837                 READ32(*nlink);
2838                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
2839                 ret = NFS_ATTR_FATTR_NLINK;
2840         }
2841         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
2842         return ret;
2843 }
2844
2845 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *uid)
2846 {
2847         uint32_t len;
2848         __be32 *p;
2849         int ret = 0;
2850
2851         *uid = -2;
2852         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
2853                 return -EIO;
2854         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
2855                 READ_BUF(4);
2856                 READ32(len);
2857                 READ_BUF(len);
2858                 if (len < XDR_MAX_NETOBJ) {
2859                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
2860                                 ret = NFS_ATTR_FATTR_OWNER;
2861                         else
2862                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
2863                                                 __func__);
2864                 } else
2865                         dprintk("%s: name too long (%u)!\n",
2866                                         __func__, len);
2867                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
2868         }
2869         dprintk("%s: uid=%d\n", __func__, (int)*uid);
2870         return ret;
2871 }
2872
2873 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, uint32_t *gid)
2874 {
2875         uint32_t len;
2876         __be32 *p;
2877         int ret = 0;
2878
2879         *gid = -2;
2880         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
2881                 return -EIO;
2882         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
2883                 READ_BUF(4);
2884                 READ32(len);
2885                 READ_BUF(len);
2886                 if (len < XDR_MAX_NETOBJ) {
2887                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
2888                                 ret = NFS_ATTR_FATTR_GROUP;
2889                         else
2890                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
2891                                                 __func__);
2892                 } else
2893                         dprintk("%s: name too long (%u)!\n",
2894                                         __func__, len);
2895                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
2896         }
2897         dprintk("%s: gid=%d\n", __func__, (int)*gid);
2898         return ret;
2899 }
2900
2901 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
2902 {
2903         uint32_t major = 0, minor = 0;
2904         __be32 *p;
2905         int ret = 0;
2906
2907         *rdev = MKDEV(0,0);
2908         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
2909                 return -EIO;
2910         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
2911                 dev_t tmp;
2912
2913                 READ_BUF(8);
2914                 READ32(major);
2915                 READ32(minor);
2916                 tmp = MKDEV(major, minor);
2917                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
2918                         *rdev = tmp;
2919                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
2920                 ret = NFS_ATTR_FATTR_RDEV;
2921         }
2922         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
2923         return ret;
2924 }
2925
2926 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2927 {
2928         __be32 *p;
2929         int status = 0;
2930
2931         *res = 0;
2932         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
2933                 return -EIO;
2934         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
2935                 READ_BUF(8);
2936                 READ64(*res);
2937                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
2938         }
2939         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
2940         return status;
2941 }
2942
2943 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2944 {
2945         __be32 *p;
2946         int status = 0;
2947
2948         *res = 0;
2949         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
2950                 return -EIO;
2951         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
2952                 READ_BUF(8);
2953                 READ64(*res);
2954                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
2955         }
2956         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
2957         return status;
2958 }
2959
2960 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
2961 {
2962         __be32 *p;
2963         int status = 0;
2964
2965         *res = 0;
2966         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
2967                 return -EIO;
2968         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
2969                 READ_BUF(8);
2970                 READ64(*res);
2971                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
2972         }
2973         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
2974         return status;
2975 }
2976
2977 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
2978 {
2979         __be32 *p;
2980         int ret = 0;
2981
2982         *used = 0;
2983         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
2984                 return -EIO;
2985         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
2986                 READ_BUF(8);
2987                 READ64(*used);
2988                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
2989                 ret = NFS_ATTR_FATTR_SPACE_USED;
2990         }
2991         dprintk("%s: space used=%Lu\n", __func__,
2992                         (unsigned long long)*used);
2993         return ret;
2994 }
2995
2996 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
2997 {
2998         __be32 *p;
2999         uint64_t sec;
3000         uint32_t nsec;
3001
3002         READ_BUF(12);
3003         READ64(sec);
3004         READ32(nsec);
3005         time->tv_sec = (time_t)sec;
3006         time->tv_nsec = (long)nsec;
3007         return 0;
3008 }
3009
3010 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3011 {
3012         int status = 0;
3013
3014         time->tv_sec = 0;
3015         time->tv_nsec = 0;
3016         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3017                 return -EIO;
3018         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3019                 status = decode_attr_time(xdr, time);
3020                 if (status == 0)
3021                         status = NFS_ATTR_FATTR_ATIME;
3022                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3023         }
3024         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3025         return status;
3026 }
3027
3028 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3029 {
3030         int status = 0;
3031
3032         time->tv_sec = 0;
3033         time->tv_nsec = 0;
3034         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3035                 return -EIO;
3036         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3037                 status = decode_attr_time(xdr, time);
3038                 if (status == 0)
3039                         status = NFS_ATTR_FATTR_CTIME;
3040                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3041         }
3042         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3043         return status;
3044 }
3045
3046 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3047 {
3048         int status = 0;
3049
3050         time->tv_sec = 0;
3051         time->tv_nsec = 0;
3052         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3053                 return -EIO;
3054         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3055                 status = decode_attr_time(xdr, time);
3056                 if (status == 0)
3057                         status = NFS_ATTR_FATTR_MTIME;
3058                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3059         }
3060         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3061         return status;
3062 }
3063
3064 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3065 {
3066         unsigned int attrwords = XDR_QUADLEN(attrlen);
3067         unsigned int nwords = xdr->p - savep;
3068
3069         if (unlikely(attrwords != nwords)) {
3070                 dprintk("%s: server returned incorrect attribute length: "
3071                         "%u %c %u\n",
3072                                 __func__,
3073                                 attrwords << 2,
3074                                 (attrwords < nwords) ? '<' : '>',
3075                                 nwords << 2);
3076                 return -EIO;
3077         }
3078         return 0;
3079 }
3080
3081 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3082 {
3083         __be32 *p;
3084
3085         READ_BUF(20);
3086         READ32(cinfo->atomic);
3087         READ64(cinfo->before);
3088         READ64(cinfo->after);
3089         return 0;
3090 }
3091
3092 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3093 {
3094         __be32 *p;
3095         uint32_t supp, acc;
3096         int status;
3097
3098         status = decode_op_hdr(xdr, OP_ACCESS);
3099         if (status)
3100                 return status;
3101         READ_BUF(8);
3102         READ32(supp);
3103         READ32(acc);
3104         access->supported = supp;
3105         access->access = acc;
3106         return 0;
3107 }
3108
3109 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3110 {
3111         __be32 *p;
3112         int status;
3113
3114         status = decode_op_hdr(xdr, OP_CLOSE);
3115         if (status != -EIO)
3116                 nfs_increment_open_seqid(status, res->seqid);
3117         if (status)
3118                 return status;
3119         READ_BUF(NFS4_STATEID_SIZE);
3120         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3121         return 0;
3122 }
3123
3124 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3125 {
3126         __be32 *p;
3127         int status;
3128
3129         status = decode_op_hdr(xdr, OP_COMMIT);
3130         if (status)
3131                 return status;
3132         READ_BUF(8);
3133         COPYMEM(res->verf->verifier, 8);
3134         return 0;
3135 }
3136
3137 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3138 {
3139         __be32 *p;
3140         uint32_t bmlen;
3141         int status;
3142
3143         status = decode_op_hdr(xdr, OP_CREATE);
3144         if (status)
3145                 return status;
3146         if ((status = decode_change_info(xdr, cinfo)))
3147                 return status;
3148         READ_BUF(4);
3149         READ32(bmlen);
3150         READ_BUF(bmlen << 2);
3151         return 0;
3152 }
3153
3154 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3155 {
3156         __be32 *savep;
3157         uint32_t attrlen, bitmap[2] = {0};
3158         int status;
3159
3160         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3161                 goto xdr_error;
3162         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3163                 goto xdr_error;
3164         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3165                 goto xdr_error;
3166         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3167                 goto xdr_error;
3168         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3169                 goto xdr_error;
3170         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3171                 goto xdr_error;
3172         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3173                 goto xdr_error;
3174         status = verify_attr_len(xdr, savep, attrlen);
3175 xdr_error:
3176         dprintk("%s: xdr returned %d!\n", __func__, -status);
3177         return status;
3178 }
3179
3180 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3181 {
3182         __be32 *savep;
3183         uint32_t attrlen, bitmap[2] = {0};
3184         int status;
3185
3186         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3187                 goto xdr_error;
3188         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3189                 goto xdr_error;
3190         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3191                 goto xdr_error;
3192
3193         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3194                 goto xdr_error;
3195         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3196                 goto xdr_error;
3197         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3198                 goto xdr_error;
3199         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3200                 goto xdr_error;
3201         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3202                 goto xdr_error;
3203         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3204                 goto xdr_error;
3205
3206         status = verify_attr_len(xdr, savep, attrlen);
3207 xdr_error:
3208         dprintk("%s: xdr returned %d!\n", __func__, -status);
3209         return status;
3210 }
3211
3212 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3213 {
3214         __be32 *savep;
3215         uint32_t attrlen, bitmap[2] = {0};
3216         int status;
3217
3218         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3219                 goto xdr_error;
3220         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3221                 goto xdr_error;
3222         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3223                 goto xdr_error;
3224
3225         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3226                 goto xdr_error;
3227         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3228                 goto xdr_error;
3229
3230         status = verify_attr_len(xdr, savep, attrlen);
3231 xdr_error:
3232         dprintk("%s: xdr returned %d!\n", __func__, -status);
3233         return status;
3234 }
3235
3236 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
3237 {
3238         __be32 *savep;
3239         uint32_t attrlen,
3240                  bitmap[2] = {0},
3241                  type;
3242         int status;
3243         umode_t fmode = 0;
3244         uint64_t fileid;
3245
3246         status = decode_op_hdr(xdr, OP_GETATTR);
3247         if (status < 0)
3248                 goto xdr_error;
3249
3250         status = decode_attr_bitmap(xdr, bitmap);
3251         if (status < 0)
3252                 goto xdr_error;
3253
3254         status = decode_attr_length(xdr, &attrlen, &savep);
3255         if (status < 0)
3256                 goto xdr_error;
3257
3258
3259         status = decode_attr_type(xdr, bitmap, &type);
3260         if (status < 0)
3261                 goto xdr_error;
3262         fattr->mode = 0;
3263         if (status != 0) {
3264                 fattr->mode |= nfs_type2fmt[type];
3265                 fattr->valid |= status;
3266         }
3267
3268         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3269         if (status < 0)
3270                 goto xdr_error;
3271         fattr->valid |= status;
3272
3273         status = decode_attr_size(xdr, bitmap, &fattr->size);
3274         if (status < 0)
3275                 goto xdr_error;
3276         fattr->valid |= status;
3277
3278         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3279         if (status < 0)
3280                 goto xdr_error;
3281         fattr->valid |= status;
3282
3283         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3284         if (status < 0)
3285                 goto xdr_error;
3286         fattr->valid |= status;
3287
3288         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3289                                                 struct nfs4_fs_locations,
3290                                                 fattr));
3291         if (status < 0)
3292                 goto xdr_error;
3293         fattr->valid |= status;
3294
3295         status = decode_attr_mode(xdr, bitmap, &fmode);
3296         if (status < 0)
3297                 goto xdr_error;
3298         if (status != 0) {
3299                 fattr->mode |= fmode;
3300                 fattr->valid |= status;
3301         }
3302
3303         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3304         if (status < 0)
3305                 goto xdr_error;
3306         fattr->valid |= status;
3307
3308         status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid);
3309         if (status < 0)
3310                 goto xdr_error;
3311         fattr->valid |= status;
3312
3313         status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid);
3314         if (status < 0)
3315                 goto xdr_error;
3316         fattr->valid |= status;
3317
3318         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3319         if (status < 0)
3320                 goto xdr_error;
3321         fattr->valid |= status;
3322
3323         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3324         if (status < 0)
3325                 goto xdr_error;
3326         fattr->valid |= status;
3327
3328         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3329         if (status < 0)
3330                 goto xdr_error;
3331         fattr->valid |= status;
3332
3333         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3334         if (status < 0)
3335                 goto xdr_error;
3336         fattr->valid |= status;
3337
3338         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3339         if (status < 0)
3340                 goto xdr_error;
3341         fattr->valid |= status;
3342
3343         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3344         if (status < 0)
3345                 goto xdr_error;
3346         if (status != 0 && !(fattr->valid & status)) {
3347                 fattr->fileid = fileid;
3348                 fattr->valid |= status;
3349         }
3350
3351         status = verify_attr_len(xdr, savep, attrlen);
3352 xdr_error:
3353         dprintk("%s: xdr returned %d\n", __func__, -status);
3354         return status;
3355 }
3356
3357
3358 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
3359 {
3360         __be32 *savep;
3361         uint32_t attrlen, bitmap[2];
3362         int status;
3363
3364         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3365                 goto xdr_error;
3366         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3367                 goto xdr_error;
3368         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3369                 goto xdr_error;
3370
3371         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
3372
3373         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
3374                 goto xdr_error;
3375         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
3376                 goto xdr_error;
3377         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
3378                 goto xdr_error;
3379         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
3380         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
3381                 goto xdr_error;
3382         fsinfo->wtpref = fsinfo->wtmax;
3383
3384         status = verify_attr_len(xdr, savep, attrlen);
3385 xdr_error:
3386         dprintk("%s: xdr returned %d!\n", __func__, -status);
3387         return status;
3388 }
3389
3390 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
3391 {
3392         __be32 *p;
3393         uint32_t len;
3394         int status;
3395
3396         /* Zero handle first to allow comparisons */
3397         memset(fh, 0, sizeof(*fh));
3398
3399         status = decode_op_hdr(xdr, OP_GETFH);
3400         if (status)
3401                 return status;
3402
3403         READ_BUF(4);
3404         READ32(len);
3405         if (len > NFS4_FHSIZE)
3406                 return -EIO;
3407         fh->size = len;
3408         READ_BUF(len);
3409         COPYMEM(fh->data, len);
3410         return 0;
3411 }
3412
3413 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3414 {
3415         int status;
3416
3417         status = decode_op_hdr(xdr, OP_LINK);
3418         if (status)
3419                 return status;
3420         return decode_change_info(xdr, cinfo);
3421 }
3422
3423 /*
3424  * We create the owner, so we know a proper owner.id length is 4.
3425  */
3426 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
3427 {
3428         uint64_t offset, length, clientid;
3429         __be32 *p;
3430         uint32_t namelen, type;
3431
3432         READ_BUF(32);
3433         READ64(offset);
3434         READ64(length);
3435         READ32(type);
3436         if (fl != NULL) {
3437                 fl->fl_start = (loff_t)offset;
3438                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
3439                 if (length == ~(uint64_t)0)
3440                         fl->fl_end = OFFSET_MAX;
3441                 fl->fl_type = F_WRLCK;
3442                 if (type & 1)
3443                         fl->fl_type = F_RDLCK;
3444                 fl->fl_pid = 0;
3445         }
3446         READ64(clientid);
3447         READ32(namelen);
3448         READ_BUF(namelen);
3449         return -NFS4ERR_DENIED;
3450 }
3451
3452 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
3453 {
3454         __be32 *p;
3455         int status;
3456
3457         status = decode_op_hdr(xdr, OP_LOCK);
3458         if (status == -EIO)
3459                 goto out;
3460         if (status == 0) {
3461                 READ_BUF(NFS4_STATEID_SIZE);
3462                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3463         } else if (status == -NFS4ERR_DENIED)
3464                 status = decode_lock_denied(xdr, NULL);
3465         if (res->open_seqid != NULL)
3466                 nfs_increment_open_seqid(status, res->open_seqid);
3467         nfs_increment_lock_seqid(status, res->lock_seqid);
3468 out:
3469         return status;
3470 }
3471
3472 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
3473 {
3474         int status;
3475         status = decode_op_hdr(xdr, OP_LOCKT);
3476         if (status == -NFS4ERR_DENIED)
3477                 return decode_lock_denied(xdr, res->denied);
3478         return status;
3479 }
3480
3481 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
3482 {
3483         __be32 *p;
3484         int status;
3485
3486         status = decode_op_hdr(xdr, OP_LOCKU);
3487         if (status != -EIO)
3488                 nfs_increment_lock_seqid(status, res->seqid);
3489         if (status == 0) {
3490                 READ_BUF(NFS4_STATEID_SIZE);
3491                 COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3492         }
3493         return status;
3494 }
3495
3496 static int decode_lookup(struct xdr_stream *xdr)
3497 {
3498         return decode_op_hdr(xdr, OP_LOOKUP);
3499 }
3500
3501 /* This is too sick! */
3502 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
3503 {
3504         __be32 *p;
3505         uint32_t limit_type, nblocks, blocksize;
3506
3507         READ_BUF(12);
3508         READ32(limit_type);
3509         switch (limit_type) {
3510         case 1:
3511                 READ64(*maxsize);
3512                 break;
3513         case 2:
3514                 READ32(nblocks);
3515                 READ32(blocksize);
3516                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
3517         }
3518         return 0;
3519 }
3520
3521 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
3522 {
3523         __be32 *p;
3524         uint32_t delegation_type;
3525
3526         READ_BUF(4);
3527         READ32(delegation_type);
3528         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
3529                 res->delegation_type = 0;
3530                 return 0;
3531         }
3532         READ_BUF(NFS4_STATEID_SIZE+4);
3533         COPYMEM(res->delegation.data, NFS4_STATEID_SIZE);
3534         READ32(res->do_recall);
3535
3536         switch (delegation_type) {
3537         case NFS4_OPEN_DELEGATE_READ:
3538                 res->delegation_type = FMODE_READ;
3539                 break;
3540         case NFS4_OPEN_DELEGATE_WRITE:
3541                 res->delegation_type = FMODE_WRITE|FMODE_READ;
3542                 if (decode_space_limit(xdr, &res->maxsize) < 0)
3543                                 return -EIO;
3544         }
3545         return decode_ace(xdr, NULL, res->server->nfs_client);
3546 }
3547
3548 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
3549 {
3550         __be32 *p;
3551         uint32_t savewords, bmlen, i;
3552         int status;
3553
3554         status = decode_op_hdr(xdr, OP_OPEN);
3555         if (status != -EIO)
3556                 nfs_increment_open_seqid(status, res->seqid);
3557         if (status)
3558                 return status;
3559         READ_BUF(NFS4_STATEID_SIZE);
3560         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3561
3562         decode_change_info(xdr, &res->cinfo);
3563
3564         READ_BUF(8);
3565         READ32(res->rflags);
3566         READ32(bmlen);
3567         if (bmlen > 10)
3568                 goto xdr_error;
3569
3570         READ_BUF(bmlen << 2);
3571         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
3572         for (i = 0; i < savewords; ++i)
3573                 READ32(res->attrset[i]);
3574         for (; i < NFS4_BITMAP_SIZE; i++)
3575                 res->attrset[i] = 0;
3576
3577         return decode_delegation(xdr, res);
3578 xdr_error:
3579         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
3580         return -EIO;
3581 }
3582
3583 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
3584 {
3585         __be32 *p;
3586         int status;
3587
3588         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
3589         if (status != -EIO)
3590                 nfs_increment_open_seqid(status, res->seqid);
3591         if (status)
3592                 return status;
3593         READ_BUF(NFS4_STATEID_SIZE);
3594         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3595         return 0;
3596 }
3597
3598 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
3599 {
3600         __be32 *p;
3601         int status;
3602
3603         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
3604         if (status != -EIO)
3605                 nfs_increment_open_seqid(status, res->seqid);
3606         if (status)
3607                 return status;
3608         READ_BUF(NFS4_STATEID_SIZE);
3609         COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
3610         return 0;
3611 }
3612
3613 static int decode_putfh(struct xdr_stream *xdr)
3614 {
3615         return decode_op_hdr(xdr, OP_PUTFH);
3616 }
3617
3618 static int decode_putrootfh(struct xdr_stream *xdr)
3619 {
3620         return decode_op_hdr(xdr, OP_PUTROOTFH);
3621 }
3622
3623 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
3624 {
3625         struct kvec *iov = req->rq_rcv_buf.head;
3626         __be32 *p;
3627         uint32_t count, eof, recvd, hdrlen;
3628         int status;
3629
3630         status = decode_op_hdr(xdr, OP_READ);
3631         if (status)
3632                 return status;
3633         READ_BUF(8);
3634         READ32(eof);
3635         READ32(count);
3636         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
3637         recvd = req->rq_rcv_buf.len - hdrlen;
3638         if (count > recvd) {
3639                 dprintk("NFS: server cheating in read reply: "
3640                                 "count %u > recvd %u\n", count, recvd);
3641                 count = recvd;
3642                 eof = 0;
3643         }
3644         xdr_read_pages(xdr, count);
3645         res->eof = eof;
3646         res->count = count;
3647         return 0;
3648 }
3649
3650 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
3651 {
3652         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
3653         struct page     *page = *rcvbuf->pages;
3654         struct kvec     *iov = rcvbuf->head;
3655         size_t          hdrlen;
3656         u32             recvd, pglen = rcvbuf->page_len;
3657         __be32          *end, *entry, *p, *kaddr;
3658         unsigned int    nr = 0;
3659         int             status;
3660
3661         status = decode_op_hdr(xdr, OP_READDIR);
3662         if (status)
3663                 return status;
3664         READ_BUF(8);
3665         COPYMEM(readdir->verifier.data, 8);
3666         dprintk("%s: verifier = %08x:%08x\n",
3667                         __func__,
3668                         ((u32 *)readdir->verifier.data)[0],
3669                         ((u32 *)readdir->verifier.data)[1]);
3670
3671
3672         hdrlen = (char *) p - (char *) iov->iov_base;
3673         recvd = rcvbuf->len - hdrlen;
3674         if (pglen > recvd)
3675                 pglen = recvd;
3676         xdr_read_pages(xdr, pglen);
3677
3678         BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
3679         kaddr = p = kmap_atomic(page, KM_USER0);
3680         end = p + ((pglen + readdir->pgbase) >> 2);
3681         entry = p;
3682
3683         /* Make sure the packet actually has a value_follows and EOF entry */
3684         if ((entry + 1) > end)
3685                 goto short_pkt;
3686
3687         for (; *p++; nr++) {
3688                 u32 len, attrlen, xlen;
3689                 if (end - p < 3)
3690                         goto short_pkt;
3691                 dprintk("cookie = %Lu, ", *((unsigned long long *)p));
3692                 p += 2;                 /* cookie */
3693                 len = ntohl(*p++);      /* filename length */
3694                 if (len > NFS4_MAXNAMLEN) {
3695                         dprintk("NFS: giant filename in readdir (len 0x%x)\n",
3696                                         len);
3697                         goto err_unmap;
3698                 }
3699                 xlen = XDR_QUADLEN(len);
3700                 if (end - p < xlen + 1)
3701                         goto short_pkt;
3702                 dprintk("filename = %*s\n", len, (char *)p);
3703                 p += xlen;
3704                 len = ntohl(*p++);      /* bitmap length */
3705                 if (end - p < len + 1)
3706                         goto short_pkt;
3707                 p += len;
3708                 attrlen = XDR_QUADLEN(ntohl(*p++));
3709                 if (end - p < attrlen + 2)
3710                         goto short_pkt;
3711                 p += attrlen;           /* attributes */
3712                 entry = p;
3713         }
3714         /*
3715          * Apparently some server sends responses that are a valid size, but
3716          * contain no entries, and have value_follows==0 and EOF==0. For
3717          * those, just set the EOF marker.
3718          */
3719         if (!nr && entry[1] == 0) {
3720                 dprintk("NFS: readdir reply truncated!\n");
3721                 entry[1] = 1;
3722         }
3723 out:
3724         kunmap_atomic(kaddr, KM_USER0);
3725         return 0;
3726 short_pkt:
3727         /*
3728          * When we get a short packet there are 2 possibilities. We can
3729          * return an error, or fix up the response to look like a valid
3730          * response and return what we have so far. If there are no
3731          * entries and the packet was short, then return -EIO. If there
3732          * are valid entries in the response, return them and pretend that
3733          * the call was successful, but incomplete. The caller can retry the
3734          * readdir starting at the last cookie.
3735          */
3736         dprintk("%s: short packet at entry %d\n", __func__, nr);
3737         entry[0] = entry[1] = 0;
3738         if (nr)
3739                 goto out;
3740 err_unmap:
3741         kunmap_atomic(kaddr, KM_USER0);
3742         return -errno_NFSERR_IO;
3743 }
3744
3745 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
3746 {
3747         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
3748         struct kvec *iov = rcvbuf->head;
3749         size_t hdrlen;
3750         u32 len, recvd;
3751         __be32 *p;
3752         char *kaddr;
3753         int status;
3754
3755         status = decode_op_hdr(xdr, OP_READLINK);
3756         if (status)
3757                 return status;
3758
3759         /* Convert length of symlink */
3760         READ_BUF(4);
3761         READ32(len);
3762         if (len >= rcvbuf->page_len || len <= 0) {
3763                 dprintk("nfs: server returned giant symlink!\n");
3764                 return -ENAMETOOLONG;
3765         }
3766         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
3767         recvd = req->rq_rcv_buf.len - hdrlen;
3768         if (recvd < len) {
3769                 dprintk("NFS: server cheating in readlink reply: "
3770                                 "count %u > recvd %u\n", len, recvd);
3771                 return -EIO;
3772         }
3773         xdr_read_pages(xdr, len);
3774         /*
3775          * The XDR encode routine has set things up so that
3776          * the link text will be copied directly into the
3777          * buffer.  We just have to do overflow-checking,
3778          * and and null-terminate the text (the VFS expects
3779          * null-termination).
3780          */
3781         kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
3782         kaddr[len+rcvbuf->page_base] = '\0';
3783         kunmap_atomic(kaddr, KM_USER0);
3784         return 0;
3785 }
3786
3787 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3788 {
3789         int status;
3790
3791         status = decode_op_hdr(xdr, OP_REMOVE);
3792         if (status)
3793                 goto out;
3794         status = decode_change_info(xdr, cinfo);
3795 out:
3796         return status;
3797 }
3798
3799 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
3800               struct nfs4_change_info *new_cinfo)
3801 {
3802         int status;
3803
3804         status = decode_op_hdr(xdr, OP_RENAME);
3805         if (status)
3806                 goto out;
3807         if ((status = decode_change_info(xdr, old_cinfo)))
3808                 goto out;
3809         status = decode_change_info(xdr, new_cinfo);
3810 out:
3811         return status;
3812 }
3813
3814 static int decode_renew(struct xdr_stream *xdr)
3815 {
3816         return decode_op_hdr(xdr, OP_RENEW);
3817 }
3818
3819 static int
3820 decode_restorefh(struct xdr_stream *xdr)
3821 {
3822         return decode_op_hdr(xdr, OP_RESTOREFH);
3823 }
3824
3825 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
3826                 size_t *acl_len)
3827 {
3828         __be32 *savep;
3829         uint32_t attrlen,
3830                  bitmap[2] = {0};
3831         struct kvec *iov = req->rq_rcv_buf.head;
3832         int status;
3833
3834         *acl_len = 0;
3835         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3836                 goto out;
3837         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3838                 goto out;
3839         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3840                 goto out;
3841
3842         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
3843                 return -EIO;
3844         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
3845                 size_t hdrlen;
3846                 u32 recvd;
3847
3848                 /* We ignore &savep and don't do consistency checks on
3849                  * the attr length.  Let userspace figure it out.... */
3850                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
3851                 recvd = req->rq_rcv_buf.len - hdrlen;
3852                 if (attrlen > recvd) {
3853                         dprintk("NFS: server cheating in getattr"
3854                                         " acl reply: attrlen %u > recvd %u\n",
3855                                         attrlen, recvd);
3856                         return -EINVAL;
3857                 }
3858                 xdr_read_pages(xdr, attrlen);
3859                 *acl_len = attrlen;
3860         } else
3861                 status = -EOPNOTSUPP;
3862
3863 out:
3864         return status;
3865 }
3866
3867 static int
3868 decode_savefh(struct xdr_stream *xdr)
3869 {
3870         return decode_op_hdr(xdr, OP_SAVEFH);
3871 }
3872
3873 static int decode_setattr(struct xdr_stream *xdr)
3874 {
3875         __be32 *p;
3876         uint32_t bmlen;
3877         int status;
3878
3879         status = decode_op_hdr(xdr, OP_SETATTR);
3880         if (status)
3881                 return status;
3882         READ_BUF(4);
3883         READ32(bmlen);
3884         READ_BUF(bmlen << 2);
3885         return 0;
3886 }
3887
3888 static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
3889 {
3890         __be32 *p;
3891         uint32_t opnum;
3892         int32_t nfserr;
3893
3894         READ_BUF(8);
3895         READ32(opnum);
3896         if (opnum != OP_SETCLIENTID) {
3897                 dprintk("nfs: decode_setclientid: Server returned operation"
3898                         " %d\n", opnum);
3899                 return -EIO;
3900         }
3901         READ32(nfserr);
3902         if (nfserr == NFS_OK) {
3903                 READ_BUF(8 + NFS4_VERIFIER_SIZE);
3904                 READ64(clp->cl_clientid);
3905                 COPYMEM(clp->cl_confirm.data, NFS4_VERIFIER_SIZE);
3906         } else if (nfserr == NFSERR_CLID_INUSE) {
3907                 uint32_t len;
3908
3909                 /* skip netid string */
3910                 READ_BUF(4);
3911                 READ32(len);
3912                 READ_BUF(len);
3913
3914                 /* skip uaddr string */
3915                 READ_BUF(4);
3916                 READ32(len);
3917                 READ_BUF(len);
3918                 return -NFSERR_CLID_INUSE;
3919         } else
3920                 return nfs4_stat_to_errno(nfserr);
3921
3922         return 0;
3923 }
3924
3925 static int decode_setclientid_confirm(struct xdr_stream *xdr)
3926 {
3927         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
3928 }
3929
3930 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
3931 {
3932         __be32 *p;
3933         int status;
3934
3935         status = decode_op_hdr(xdr, OP_WRITE);
3936         if (status)
3937                 return status;
3938
3939         READ_BUF(16);
3940         READ32(res->count);
3941         READ32(res->verf->committed);
3942         COPYMEM(res->verf->verifier, 8);
3943         return 0;
3944 }
3945
3946 static int decode_delegreturn(struct xdr_stream *xdr)
3947 {
3948         return decode_op_hdr(xdr, OP_DELEGRETURN);
3949 }
3950
3951 #if defined(CONFIG_NFS_V4_1)
3952 static int decode_exchange_id(struct xdr_stream *xdr,
3953                               struct nfs41_exchange_id_res *res)
3954 {
3955         __be32 *p;
3956         uint32_t dummy;
3957         int status;
3958         struct nfs_client *clp = res->client;
3959
3960         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
3961         if (status)
3962                 return status;
3963
3964         READ_BUF(8);
3965         READ64(clp->cl_ex_clid);
3966         READ_BUF(12);
3967         READ32(clp->cl_seqid);
3968         READ32(clp->cl_exchange_flags);
3969
3970         /* We ask for SP4_NONE */
3971         READ32(dummy);
3972         if (dummy != SP4_NONE)
3973                 return -EIO;
3974
3975         /* Throw away minor_id */
3976         READ_BUF(8);
3977
3978         /* Throw away Major id */
3979         READ_BUF(4);
3980         READ32(dummy);
3981         READ_BUF(dummy);
3982
3983         /* Throw away server_scope */
3984         READ_BUF(4);
3985         READ32(dummy);
3986         READ_BUF(dummy);
3987
3988         /* Throw away Implementation id array */
3989         READ_BUF(4);
3990         READ32(dummy);
3991         READ_BUF(dummy);
3992
3993         return 0;
3994 }
3995 #endif /* CONFIG_NFS_V4_1 */
3996
3997 static int decode_sequence(struct xdr_stream *xdr,
3998                            struct nfs4_sequence_res *res,
3999                            struct rpc_rqst *rqstp)
4000 {
4001 #if defined(CONFIG_NFS_V4_1)
4002         if (!res->sr_session)
4003                 return 0;
4004
4005         /* stub */
4006 #endif /* CONFIG_NFS_V4_1 */
4007
4008         return 0;
4009 }
4010
4011 /*
4012  * END OF "GENERIC" DECODE ROUTINES.
4013  */
4014
4015 /*
4016  * Decode OPEN_DOWNGRADE response
4017  */
4018 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4019 {
4020         struct xdr_stream xdr;
4021         struct compound_hdr hdr;
4022         int status;
4023
4024         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4025         status = decode_compound_hdr(&xdr, &hdr);
4026         if (status)
4027                 goto out;
4028         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4029         if (status)
4030                 goto out;
4031         status = decode_putfh(&xdr);
4032         if (status)
4033                 goto out;
4034         status = decode_open_downgrade(&xdr, res);
4035         if (status != 0)
4036                 goto out;
4037         decode_getfattr(&xdr, res->fattr, res->server);
4038 out:
4039         return status;
4040 }
4041
4042 /*
4043  * Decode ACCESS response
4044  */
4045 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res)
4046 {
4047         struct xdr_stream xdr;
4048         struct compound_hdr hdr;
4049         int status;
4050
4051         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4052         status = decode_compound_hdr(&xdr, &hdr);
4053         if (status)
4054                 goto out;
4055         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4056         if (status)
4057                 goto out;
4058         status = decode_putfh(&xdr);
4059         if (status != 0)
4060                 goto out;
4061         status = decode_access(&xdr, res);
4062         if (status != 0)
4063                 goto out;
4064         decode_getfattr(&xdr, res->fattr, res->server);
4065 out:
4066         return status;
4067 }
4068
4069 /*
4070  * Decode LOOKUP response
4071  */
4072 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4073 {
4074         struct xdr_stream xdr;
4075         struct compound_hdr hdr;
4076         int status;
4077
4078         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4079         status = decode_compound_hdr(&xdr, &hdr);
4080         if (status)
4081                 goto out;
4082         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4083         if (status)
4084                 goto out;
4085         if ((status = decode_putfh(&xdr)) != 0)
4086                 goto out;
4087         if ((status = decode_lookup(&xdr)) != 0)
4088                 goto out;
4089         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4090                 goto out;
4091         status = decode_getfattr(&xdr, res->fattr, res->server);
4092 out:
4093         return status;
4094 }
4095
4096 /*
4097  * Decode LOOKUP_ROOT response
4098  */
4099 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res)
4100 {
4101         struct xdr_stream xdr;
4102         struct compound_hdr hdr;
4103         int status;
4104
4105         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4106         status = decode_compound_hdr(&xdr, &hdr);
4107         if (status)
4108                 goto out;
4109         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4110         if (status)
4111                 goto out;
4112         if ((status = decode_putrootfh(&xdr)) != 0)
4113                 goto out;
4114         if ((status = decode_getfh(&xdr, res->fh)) == 0)
4115                 status = decode_getfattr(&xdr, res->fattr, res->server);
4116 out:
4117         return status;
4118 }
4119
4120 /*
4121  * Decode REMOVE response
4122  */
4123 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res)
4124 {
4125         struct xdr_stream xdr;
4126         struct compound_hdr hdr;
4127         int status;
4128
4129         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4130         status = decode_compound_hdr(&xdr, &hdr);
4131         if (status)
4132                 goto out;
4133         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4134         if (status)
4135                 goto out;
4136         if ((status = decode_putfh(&xdr)) != 0)
4137                 goto out;
4138         if ((status = decode_remove(&xdr, &res->cinfo)) != 0)
4139                 goto out;
4140         decode_getfattr(&xdr, &res->dir_attr, res->server);
4141 out:
4142         return status;
4143 }
4144
4145 /*
4146  * Decode RENAME response
4147  */
4148 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
4149 {
4150         struct xdr_stream xdr;
4151         struct compound_hdr hdr;
4152         int status;
4153
4154         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4155         status = decode_compound_hdr(&xdr, &hdr);
4156         if (status)
4157                 goto out;
4158         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4159         if (status)
4160                 goto out;
4161         if ((status = decode_putfh(&xdr)) != 0)
4162                 goto out;
4163         if ((status = decode_savefh(&xdr)) != 0)
4164                 goto out;
4165         if ((status = decode_putfh(&xdr)) != 0)
4166                 goto out;
4167         if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0)
4168                 goto out;
4169         /* Current FH is target directory */
4170         if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0)
4171                 goto out;
4172         if ((status = decode_restorefh(&xdr)) != 0)
4173                 goto out;
4174         decode_getfattr(&xdr, res->old_fattr, res->server);
4175 out:
4176         return status;
4177 }
4178
4179 /*
4180  * Decode LINK response
4181  */
4182 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res)
4183 {
4184         struct xdr_stream xdr;
4185         struct compound_hdr hdr;
4186         int status;
4187
4188         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4189         status = decode_compound_hdr(&xdr, &hdr);
4190         if (status)
4191                 goto out;
4192         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4193         if (status)
4194                 goto out;
4195         if ((status = decode_putfh(&xdr)) != 0)
4196                 goto out;
4197         if ((status = decode_savefh(&xdr)) != 0)
4198                 goto out;
4199         if ((status = decode_putfh(&xdr)) != 0)
4200                 goto out;
4201         if ((status = decode_link(&xdr, &res->cinfo)) != 0)
4202                 goto out;
4203         /*
4204          * Note order: OP_LINK leaves the directory as the current
4205          *             filehandle.
4206          */
4207         if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)
4208                 goto out;
4209         if ((status = decode_restorefh(&xdr)) != 0)
4210                 goto out;
4211         decode_getfattr(&xdr, res->fattr, res->server);
4212 out:
4213         return status;
4214 }
4215
4216 /*
4217  * Decode CREATE response
4218  */
4219 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4220 {
4221         struct xdr_stream xdr;
4222         struct compound_hdr hdr;
4223         int status;
4224
4225         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4226         status = decode_compound_hdr(&xdr, &hdr);
4227         if (status)
4228                 goto out;
4229         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4230         if (status)
4231                 goto out;
4232         if ((status = decode_putfh(&xdr)) != 0)
4233                 goto out;
4234         if ((status = decode_savefh(&xdr)) != 0)
4235                 goto out;
4236         if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0)
4237                 goto out;
4238         if ((status = decode_getfh(&xdr, res->fh)) != 0)
4239                 goto out;
4240         if (decode_getfattr(&xdr, res->fattr, res->server) != 0)
4241                 goto out;
4242         if ((status = decode_restorefh(&xdr)) != 0)
4243                 goto out;
4244         decode_getfattr(&xdr, res->dir_fattr, res->server);
4245 out:
4246         return status;
4247 }
4248
4249 /*
4250  * Decode SYMLINK response
4251  */
4252 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res)
4253 {
4254         return nfs4_xdr_dec_create(rqstp, p, res);
4255 }
4256
4257 /*
4258  * Decode GETATTR response
4259  */
4260 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res)
4261 {
4262         struct xdr_stream xdr;
4263         struct compound_hdr hdr;
4264         int status;
4265
4266         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4267         status = decode_compound_hdr(&xdr, &hdr);
4268         if (status)
4269                 goto out;
4270         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4271         if (status)
4272                 goto out;
4273         status = decode_putfh(&xdr);
4274         if (status)
4275                 goto out;
4276         status = decode_getfattr(&xdr, res->fattr, res->server);
4277 out:
4278         return status;
4279 }
4280
4281 /*
4282  * Encode an SETACL request
4283  */
4284 static int
4285 nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args)
4286 {
4287         struct xdr_stream xdr;
4288         struct compound_hdr hdr = {
4289                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
4290         };
4291         int status;
4292
4293         xdr_init_encode(&xdr, &req->rq_snd_buf, p);
4294         encode_compound_hdr(&xdr, req, &hdr);
4295         encode_sequence(&xdr, &args->seq_args, &hdr);
4296         encode_putfh(&xdr, args->fh, &hdr);
4297         status = encode_setacl(&xdr, args, &hdr);
4298         encode_nops(&hdr);
4299         return status;
4300 }
4301
4302 /*
4303  * Decode SETACL response
4304  */
4305 static int
4306 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p,
4307                     struct nfs_setaclres *res)
4308 {
4309         struct xdr_stream xdr;
4310         struct compound_hdr hdr;
4311         int status;
4312
4313         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4314         status = decode_compound_hdr(&xdr, &hdr);
4315         if (status)
4316                 goto out;
4317         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4318         if (status)
4319                 goto out;
4320         status = decode_putfh(&xdr);
4321         if (status)
4322                 goto out;
4323         status = decode_setattr(&xdr);
4324 out:
4325         return status;
4326 }
4327
4328 /*
4329  * Decode GETACL response
4330  */
4331 static int
4332 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p,
4333                     struct nfs_getaclres *res)
4334 {
4335         struct xdr_stream xdr;
4336         struct compound_hdr hdr;
4337         int status;
4338
4339         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4340         status = decode_compound_hdr(&xdr, &hdr);
4341         if (status)
4342                 goto out;
4343         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4344         if (status)
4345                 goto out;
4346         status = decode_putfh(&xdr);
4347         if (status)
4348                 goto out;
4349         status = decode_getacl(&xdr, rqstp, &res->acl_len);
4350
4351 out:
4352         return status;
4353 }
4354
4355 /*
4356  * Decode CLOSE response
4357  */
4358 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res)
4359 {
4360         struct xdr_stream xdr;
4361         struct compound_hdr hdr;
4362         int status;
4363
4364         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4365         status = decode_compound_hdr(&xdr, &hdr);
4366         if (status)
4367                 goto out;
4368         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4369         if (status)
4370                 goto out;
4371         status = decode_putfh(&xdr);
4372         if (status)
4373                 goto out;
4374         status = decode_close(&xdr, res);
4375         if (status != 0)
4376                 goto out;
4377         /*
4378          * Note: Server may do delete on close for this file
4379          *      in which case the getattr call will fail with
4380          *      an ESTALE error. Shouldn't be a problem,
4381          *      though, since fattr->valid will remain unset.
4382          */
4383         decode_getfattr(&xdr, res->fattr, res->server);
4384 out:
4385         return status;
4386 }
4387
4388 /*
4389  * Decode OPEN response
4390  */
4391 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4392 {
4393         struct xdr_stream xdr;
4394         struct compound_hdr hdr;
4395         int status;
4396
4397         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4398         status = decode_compound_hdr(&xdr, &hdr);
4399         if (status)
4400                 goto out;
4401         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4402         if (status)
4403                 goto out;
4404         status = decode_putfh(&xdr);
4405         if (status)
4406                 goto out;
4407         status = decode_savefh(&xdr);
4408         if (status)
4409                 goto out;
4410         status = decode_open(&xdr, res);
4411         if (status)
4412                 goto out;
4413         if (decode_getfh(&xdr, &res->fh) != 0)
4414                 goto out;
4415         if (decode_getfattr(&xdr, res->f_attr, res->server) != 0)
4416                 goto out;
4417         if (decode_restorefh(&xdr) != 0)
4418                 goto out;
4419         decode_getfattr(&xdr, res->dir_attr, res->server);
4420 out:
4421         return status;
4422 }
4423
4424 /*
4425  * Decode OPEN_CONFIRM response
4426  */
4427 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res)
4428 {
4429         struct xdr_stream xdr;
4430         struct compound_hdr hdr;
4431         int status;
4432
4433         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4434         status = decode_compound_hdr(&xdr, &hdr);
4435         if (status)
4436                 goto out;
4437         status = decode_putfh(&xdr);
4438         if (status)
4439                 goto out;
4440         status = decode_open_confirm(&xdr, res);
4441 out:
4442         return status;
4443 }
4444
4445 /*
4446  * Decode OPEN response
4447  */
4448 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res)
4449 {
4450         struct xdr_stream xdr;
4451         struct compound_hdr hdr;
4452         int status;
4453
4454         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4455         status = decode_compound_hdr(&xdr, &hdr);
4456         if (status)
4457                 goto out;
4458         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4459         if (status)
4460                 goto out;
4461         status = decode_putfh(&xdr);
4462         if (status)
4463                 goto out;
4464         status = decode_open(&xdr, res);
4465         if (status)
4466                 goto out;
4467         decode_getfattr(&xdr, res->f_attr, res->server);
4468 out:
4469         return status;
4470 }
4471
4472 /*
4473  * Decode SETATTR response
4474  */
4475 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res)
4476 {
4477         struct xdr_stream xdr;
4478         struct compound_hdr hdr;
4479         int status;
4480
4481         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4482         status = decode_compound_hdr(&xdr, &hdr);
4483         if (status)
4484                 goto out;
4485         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4486         if (status)
4487                 goto out;
4488         status = decode_putfh(&xdr);
4489         if (status)
4490                 goto out;
4491         status = decode_setattr(&xdr);
4492         if (status)
4493                 goto out;
4494         decode_getfattr(&xdr, res->fattr, res->server);
4495 out:
4496         return status;
4497 }
4498
4499 /*
4500  * Decode LOCK response
4501  */
4502 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res)
4503 {
4504         struct xdr_stream xdr;
4505         struct compound_hdr hdr;
4506         int status;
4507
4508         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4509         status = decode_compound_hdr(&xdr, &hdr);
4510         if (status)
4511                 goto out;
4512         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4513         if (status)
4514                 goto out;
4515         status = decode_putfh(&xdr);
4516         if (status)
4517                 goto out;
4518         status = decode_lock(&xdr, res);
4519 out:
4520         return status;
4521 }
4522
4523 /*
4524  * Decode LOCKT response
4525  */
4526 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res)
4527 {
4528         struct xdr_stream xdr;
4529         struct compound_hdr hdr;
4530         int status;
4531
4532         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4533         status = decode_compound_hdr(&xdr, &hdr);
4534         if (status)
4535                 goto out;
4536         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4537         if (status)
4538                 goto out;
4539         status = decode_putfh(&xdr);
4540         if (status)
4541                 goto out;
4542         status = decode_lockt(&xdr, res);
4543 out:
4544         return status;
4545 }
4546
4547 /*
4548  * Decode LOCKU response
4549  */
4550 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res)
4551 {
4552         struct xdr_stream xdr;
4553         struct compound_hdr hdr;
4554         int status;
4555
4556         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4557         status = decode_compound_hdr(&xdr, &hdr);
4558         if (status)
4559                 goto out;
4560         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4561         if (status)
4562                 goto out;
4563         status = decode_putfh(&xdr);
4564         if (status)
4565                 goto out;
4566         status = decode_locku(&xdr, res);
4567 out:
4568         return status;
4569 }
4570
4571 /*
4572  * Decode READLINK response
4573  */
4574 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p,
4575                                  struct nfs4_readlink_res *res)
4576 {
4577         struct xdr_stream xdr;
4578         struct compound_hdr hdr;
4579         int status;
4580
4581         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4582         status = decode_compound_hdr(&xdr, &hdr);
4583         if (status)
4584                 goto out;
4585         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4586         if (status)
4587                 goto out;
4588         status = decode_putfh(&xdr);
4589         if (status)
4590                 goto out;
4591         status = decode_readlink(&xdr, rqstp);
4592 out:
4593         return status;
4594 }
4595
4596 /*
4597  * Decode READDIR response
4598  */
4599 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res)
4600 {
4601         struct xdr_stream xdr;
4602         struct compound_hdr hdr;
4603         int status;
4604
4605         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4606         status = decode_compound_hdr(&xdr, &hdr);
4607         if (status)
4608                 goto out;
4609         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4610         if (status)
4611                 goto out;
4612         status = decode_putfh(&xdr);
4613         if (status)
4614                 goto out;
4615         status = decode_readdir(&xdr, rqstp, res);
4616 out:
4617         return status;
4618 }
4619
4620 /*
4621  * Decode Read response
4622  */
4623 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res)
4624 {
4625         struct xdr_stream xdr;
4626         struct compound_hdr hdr;
4627         int status;
4628
4629         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4630         status = decode_compound_hdr(&xdr, &hdr);
4631         if (status)
4632                 goto out;
4633         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4634         if (status)
4635                 goto out;
4636         status = decode_putfh(&xdr);
4637         if (status)
4638                 goto out;
4639         status = decode_read(&xdr, rqstp, res);
4640         if (!status)
4641                 status = res->count;
4642 out:
4643         return status;
4644 }
4645
4646 /*
4647  * Decode WRITE response
4648  */
4649 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4650 {
4651         struct xdr_stream xdr;
4652         struct compound_hdr hdr;
4653         int status;
4654
4655         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4656         status = decode_compound_hdr(&xdr, &hdr);
4657         if (status)
4658                 goto out;
4659         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4660         if (status)
4661                 goto out;
4662         status = decode_putfh(&xdr);
4663         if (status)
4664                 goto out;
4665         status = decode_write(&xdr, res);
4666         if (status)
4667                 goto out;
4668         decode_getfattr(&xdr, res->fattr, res->server);
4669         if (!status)
4670                 status = res->count;
4671 out:
4672         return status;
4673 }
4674
4675 /*
4676  * Decode COMMIT response
4677  */
4678 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res)
4679 {
4680         struct xdr_stream xdr;
4681         struct compound_hdr hdr;
4682         int status;
4683
4684         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4685         status = decode_compound_hdr(&xdr, &hdr);
4686         if (status)
4687                 goto out;
4688         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4689         if (status)
4690                 goto out;
4691         status = decode_putfh(&xdr);
4692         if (status)
4693                 goto out;
4694         status = decode_commit(&xdr, res);
4695         if (status)
4696                 goto out;
4697         decode_getfattr(&xdr, res->fattr, res->server);
4698 out:
4699         return status;
4700 }
4701
4702 /*
4703  * FSINFO request
4704  */
4705 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p,
4706                                struct nfs4_fsinfo_res *res)
4707 {
4708         struct xdr_stream xdr;
4709         struct compound_hdr hdr;
4710         int status;
4711
4712         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4713         status = decode_compound_hdr(&xdr, &hdr);
4714         if (!status)
4715                 status = decode_sequence(&xdr, &res->seq_res, req);
4716         if (!status)
4717                 status = decode_putfh(&xdr);
4718         if (!status)
4719                 status = decode_fsinfo(&xdr, res->fsinfo);
4720         return status;
4721 }
4722
4723 /*
4724  * PATHCONF request
4725  */
4726 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p,
4727                                  struct nfs4_pathconf_res *res)
4728 {
4729         struct xdr_stream xdr;
4730         struct compound_hdr hdr;
4731         int status;
4732
4733         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4734         status = decode_compound_hdr(&xdr, &hdr);
4735         if (!status)
4736                 status = decode_sequence(&xdr, &res->seq_res, req);
4737         if (!status)
4738                 status = decode_putfh(&xdr);
4739         if (!status)
4740                 status = decode_pathconf(&xdr, res->pathconf);
4741         return status;
4742 }
4743
4744 /*
4745  * STATFS request
4746  */
4747 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p,
4748                                struct nfs4_statfs_res *res)
4749 {
4750         struct xdr_stream xdr;
4751         struct compound_hdr hdr;
4752         int status;
4753
4754         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4755         status = decode_compound_hdr(&xdr, &hdr);
4756         if (!status)
4757                 status = decode_sequence(&xdr, &res->seq_res, req);
4758         if (!status)
4759                 status = decode_putfh(&xdr);
4760         if (!status)
4761                 status = decode_statfs(&xdr, res->fsstat);
4762         return status;
4763 }
4764
4765 /*
4766  * GETATTR_BITMAP request
4767  */
4768 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res)
4769 {
4770         struct xdr_stream xdr;
4771         struct compound_hdr hdr;
4772         int status;
4773
4774         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4775         status = decode_compound_hdr(&xdr, &hdr);
4776         if (status)
4777                 goto out;
4778         status = decode_sequence(&xdr, &res->seq_res, req);
4779         if (status)
4780                 goto out;
4781         if ((status = decode_putfh(&xdr)) != 0)
4782                 goto out;
4783         status = decode_server_caps(&xdr, res);
4784 out:
4785         return status;
4786 }
4787
4788 /*
4789  * Decode RENEW response
4790  */
4791 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy)
4792 {
4793         struct xdr_stream xdr;
4794         struct compound_hdr hdr;
4795         int status;
4796
4797         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4798         status = decode_compound_hdr(&xdr, &hdr);
4799         if (!status)
4800                 status = decode_renew(&xdr);
4801         return status;
4802 }
4803
4804 /*
4805  * a SETCLIENTID request
4806  */
4807 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
4808                 struct nfs_client *clp)
4809 {
4810         struct xdr_stream xdr;
4811         struct compound_hdr hdr;
4812         int status;
4813
4814         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4815         status = decode_compound_hdr(&xdr, &hdr);
4816         if (!status)
4817                 status = decode_setclientid(&xdr, clp);
4818         return status;
4819 }
4820
4821 /*
4822  * a SETCLIENTID_CONFIRM request
4823  */
4824 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo)
4825 {
4826         struct xdr_stream xdr;
4827         struct compound_hdr hdr;
4828         int status;
4829
4830         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4831         status = decode_compound_hdr(&xdr, &hdr);
4832         if (!status)
4833                 status = decode_setclientid_confirm(&xdr);
4834         if (!status)
4835                 status = decode_putrootfh(&xdr);
4836         if (!status)
4837                 status = decode_fsinfo(&xdr, fsinfo);
4838         return status;
4839 }
4840
4841 /*
4842  * DELEGRETURN request
4843  */
4844 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res)
4845 {
4846         struct xdr_stream xdr;
4847         struct compound_hdr hdr;
4848         int status;
4849
4850         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4851         status = decode_compound_hdr(&xdr, &hdr);
4852         if (status)
4853                 goto out;
4854         status = decode_sequence(&xdr, &res->seq_res, rqstp);
4855         if (status)
4856                 goto out;
4857         status = decode_putfh(&xdr);
4858         if (status != 0)
4859                 goto out;
4860         status = decode_delegreturn(&xdr);
4861         decode_getfattr(&xdr, res->fattr, res->server);
4862 out:
4863         return status;
4864 }
4865
4866 /*
4867  * FS_LOCATIONS request
4868  */
4869 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p,
4870                                      struct nfs4_fs_locations_res *res)
4871 {
4872         struct xdr_stream xdr;
4873         struct compound_hdr hdr;
4874         int status;
4875
4876         xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
4877         status = decode_compound_hdr(&xdr, &hdr);
4878         if (status)
4879                 goto out;
4880         status = decode_sequence(&xdr, &res->seq_res, req);
4881         if (status)
4882                 goto out;
4883         if ((status = decode_putfh(&xdr)) != 0)
4884                 goto out;
4885         if ((status = decode_lookup(&xdr)) != 0)
4886                 goto out;
4887         xdr_enter_page(&xdr, PAGE_SIZE);
4888         status = decode_getfattr(&xdr, &res->fs_locations->fattr,
4889                                  res->fs_locations->server);
4890 out:
4891         return status;
4892 }
4893
4894 #if defined(CONFIG_NFS_V4_1)
4895 /*
4896  * EXCHANGE_ID request
4897  */
4898 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p,
4899                                     void *res)
4900 {
4901         struct xdr_stream xdr;
4902         struct compound_hdr hdr;
4903         int status;
4904
4905         xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
4906         status = decode_compound_hdr(&xdr, &hdr);
4907         if (!status)
4908                 status = decode_exchange_id(&xdr, res);
4909         return status;
4910 }
4911 #endif /* CONFIG_NFS_V4_1 */
4912
4913 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
4914 {
4915         uint32_t bitmap[2] = {0};
4916         uint32_t len;
4917
4918         if (!*p++) {
4919                 if (!*p)
4920                         return ERR_PTR(-EAGAIN);
4921                 entry->eof = 1;
4922                 return ERR_PTR(-EBADCOOKIE);
4923         }
4924
4925         entry->prev_cookie = entry->cookie;
4926         p = xdr_decode_hyper(p, &entry->cookie);
4927         entry->len = ntohl(*p++);
4928         entry->name = (const char *) p;
4929         p += XDR_QUADLEN(entry->len);
4930
4931         /*
4932          * In case the server doesn't return an inode number,
4933          * we fake one here.  (We don't use inode number 0,
4934          * since glibc seems to choke on it...)
4935          */
4936         entry->ino = 1;
4937
4938         len = ntohl(*p++);              /* bitmap length */
4939         if (len-- > 0) {
4940                 bitmap[0] = ntohl(*p++);
4941                 if (len-- > 0) {
4942                         bitmap[1] = ntohl(*p++);
4943                         p += len;
4944                 }
4945         }
4946         len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
4947         if (len > 0) {
4948                 if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
4949                         bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
4950                         /* Ignore the return value of rdattr_error for now */
4951                         p++;
4952                         len--;
4953                 }
4954                 if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
4955                         xdr_decode_hyper(p, &entry->ino);
4956                 else if (bitmap[0] == FATTR4_WORD0_FILEID)
4957                         xdr_decode_hyper(p, &entry->ino);
4958                 p += len;
4959         }
4960
4961         entry->eof = !p[0] && p[1];
4962         return p;
4963 }
4964
4965 /*
4966  * We need to translate between nfs status return values and
4967  * the local errno values which may not be the same.
4968  */
4969 static struct {
4970         int stat;
4971         int errno;
4972 } nfs_errtbl[] = {
4973         { NFS4_OK,              0               },
4974         { NFS4ERR_PERM,         -EPERM          },
4975         { NFS4ERR_NOENT,        -ENOENT         },
4976         { NFS4ERR_IO,           -errno_NFSERR_IO},
4977         { NFS4ERR_NXIO,         -ENXIO          },
4978         { NFS4ERR_ACCESS,       -EACCES         },
4979         { NFS4ERR_EXIST,        -EEXIST         },
4980         { NFS4ERR_XDEV,         -EXDEV          },
4981         { NFS4ERR_NOTDIR,       -ENOTDIR        },
4982         { NFS4ERR_ISDIR,        -EISDIR         },
4983         { NFS4ERR_INVAL,        -EINVAL         },
4984         { NFS4ERR_FBIG,         -EFBIG          },
4985         { NFS4ERR_NOSPC,        -ENOSPC         },
4986         { NFS4ERR_ROFS,         -EROFS          },
4987         { NFS4ERR_MLINK,        -EMLINK         },
4988         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
4989         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
4990         { NFS4ERR_DQUOT,        -EDQUOT         },
4991         { NFS4ERR_STALE,        -ESTALE         },
4992         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
4993         { NFS4ERR_BADOWNER,     -EINVAL         },
4994         { NFS4ERR_BADNAME,      -EINVAL         },
4995         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
4996         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
4997         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
4998         { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
4999         { NFS4ERR_BADTYPE,      -EBADTYPE       },
5000         { NFS4ERR_LOCKED,       -EAGAIN         },
5001         { NFS4ERR_RESOURCE,     -EREMOTEIO      },
5002         { NFS4ERR_SYMLINK,      -ELOOP          },
5003         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
5004         { NFS4ERR_DEADLOCK,     -EDEADLK        },
5005         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
5006                                                     * to be handled by a
5007                                                     * middle-layer.
5008                                                     */
5009         { -1,                   -EIO            }
5010 };
5011
5012 /*
5013  * Convert an NFS error code to a local one.
5014  * This one is used jointly by NFSv2 and NFSv3.
5015  */
5016 static int
5017 nfs4_stat_to_errno(int stat)
5018 {
5019         int i;
5020         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
5021                 if (nfs_errtbl[i].stat == stat)
5022                         return nfs_errtbl[i].errno;
5023         }
5024         if (stat <= 10000 || stat > 10100) {
5025                 /* The server is looney tunes. */
5026                 return -ESERVERFAULT;
5027         }
5028         /* If we cannot translate the error, the recovery routines should
5029          * handle it.
5030          * Note: remaining NFSv4 error codes have values > 10000, so should
5031          * not conflict with native Linux error codes.
5032          */
5033         return -stat;
5034 }
5035
5036 #define PROC(proc, argtype, restype)                            \
5037 [NFSPROC4_CLNT_##proc] = {                                      \
5038         .p_proc   = NFSPROC4_COMPOUND,                          \
5039         .p_encode = (kxdrproc_t) nfs4_xdr_##argtype,            \
5040         .p_decode = (kxdrproc_t) nfs4_xdr_##restype,            \
5041         .p_arglen = NFS4_##argtype##_sz,                        \
5042         .p_replen = NFS4_##restype##_sz,                        \
5043         .p_statidx = NFSPROC4_CLNT_##proc,                      \
5044         .p_name   = #proc,                                      \
5045 }
5046
5047 struct rpc_procinfo     nfs4_procedures[] = {
5048   PROC(READ,            enc_read,       dec_read),
5049   PROC(WRITE,           enc_write,      dec_write),
5050   PROC(COMMIT,          enc_commit,     dec_commit),
5051   PROC(OPEN,            enc_open,       dec_open),
5052   PROC(OPEN_CONFIRM,    enc_open_confirm,       dec_open_confirm),
5053   PROC(OPEN_NOATTR,     enc_open_noattr,        dec_open_noattr),
5054   PROC(OPEN_DOWNGRADE,  enc_open_downgrade,     dec_open_downgrade),
5055   PROC(CLOSE,           enc_close,      dec_close),
5056   PROC(SETATTR,         enc_setattr,    dec_setattr),
5057   PROC(FSINFO,          enc_fsinfo,     dec_fsinfo),
5058   PROC(RENEW,           enc_renew,      dec_renew),
5059   PROC(SETCLIENTID,     enc_setclientid,        dec_setclientid),
5060   PROC(SETCLIENTID_CONFIRM,     enc_setclientid_confirm,        dec_setclientid_confirm),
5061   PROC(LOCK,            enc_lock,       dec_lock),
5062   PROC(LOCKT,           enc_lockt,      dec_lockt),
5063   PROC(LOCKU,           enc_locku,      dec_locku),
5064   PROC(ACCESS,          enc_access,     dec_access),
5065   PROC(GETATTR,         enc_getattr,    dec_getattr),
5066   PROC(LOOKUP,          enc_lookup,     dec_lookup),
5067   PROC(LOOKUP_ROOT,     enc_lookup_root,        dec_lookup_root),
5068   PROC(REMOVE,          enc_remove,     dec_remove),
5069   PROC(RENAME,          enc_rename,     dec_rename),
5070   PROC(LINK,            enc_link,       dec_link),
5071   PROC(SYMLINK,         enc_symlink,    dec_symlink),
5072   PROC(CREATE,          enc_create,     dec_create),
5073   PROC(PATHCONF,        enc_pathconf,   dec_pathconf),
5074   PROC(STATFS,          enc_statfs,     dec_statfs),
5075   PROC(READLINK,        enc_readlink,   dec_readlink),
5076   PROC(READDIR,         enc_readdir,    dec_readdir),
5077   PROC(SERVER_CAPS,     enc_server_caps, dec_server_caps),
5078   PROC(DELEGRETURN,     enc_delegreturn, dec_delegreturn),
5079   PROC(GETACL,          enc_getacl,     dec_getacl),
5080   PROC(SETACL,          enc_setacl,     dec_setacl),
5081   PROC(FS_LOCATIONS,    enc_fs_locations, dec_fs_locations),
5082 #if defined(CONFIG_NFS_V4_1)
5083   PROC(EXCHANGE_ID,     enc_exchange_id,        dec_exchange_id),
5084 #endif /* CONFIG_NFS_V4_1 */
5085 };
5086
5087 struct rpc_version              nfs_version4 = {
5088         .number                 = 4,
5089         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
5090         .procs                  = nfs4_procedures
5091 };
5092
5093 /*
5094  * Local variables:
5095  *  c-basic-offset: 8
5096  * End:
5097  */