fs/nfs/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Client-side XDR for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/time.h>
  40 #include <linux/mm.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/in.h>
  44 #include <linux/pagemap.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/kdev_t.h>
  47 #include <linux/sunrpc/clnt.h>
  48 #include <linux/sunrpc/msg_prot.h>
  49 #include <linux/nfs.h>
  50 #include <linux/nfs4.h>
  51 #include <linux/nfs_fs.h>
  52 #include <linux/nfs_idmap.h>
  53 #include "nfs4_fs.h"
  54 #include "internal.h"
  55 #include "pnfs.h"
  56
  57 #define NFSDBG_FACILITY         NFSDBG_XDR
  58
  59 /* Mapping from NFS error code to "errno" error code. */
  60 #define errno_NFSERR_IO         EIO
  61
  62 static int nfs4_stat_to_errno(int);
  63
  64 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  65 #ifdef DEBUG
  66 #define NFS4_MAXTAGLEN          20
  67 #else
  68 #define NFS4_MAXTAGLEN          0
  69 #endif
  70
  71 /* lock,open owner id:
  72  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  73  */
  74 #define open_owner_id_maxsz     (1 + 1 + 4)
  75 #define lock_owner_id_maxsz     (1 + 1 + 4)
  76 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  77 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define op_encode_hdr_maxsz     (1)
  80 #define op_decode_hdr_maxsz     (2)
  81 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  86                                 (NFS4_FHSIZE >> 2))
  87 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  88 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  89 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  90 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  91 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  92                                 ((3+NFS4_FHSIZE) >> 2))
  93 #define nfs4_fattr_bitmap_maxsz 3
  94 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  95 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  96 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  97 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 /* This is based on getfattr, which uses the most attributes: */
 100 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 101                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 102 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 103                                 nfs4_fattr_value_maxsz)
 104 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 105 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 106                                  1 + 2 + 1 + \
 107                                 nfs4_owner_maxsz + \
 108                                 nfs4_group_maxsz + \
 109                                 4 + 4)
 110 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 111 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 112 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 113 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 114 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 115 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 116 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 117 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 118 #define encode_setclientid_maxsz \
 119                                 (op_encode_hdr_maxsz + \
 120                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 121                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 122                                 1 /* sc_prog */ + \
 123                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 124                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 125                                 1) /* sc_cb_ident */
 126 #define decode_setclientid_maxsz \
 127                                 (op_decode_hdr_maxsz + \
 128                                 2 + \
 129                                 1024) /* large value for CLID_INUSE */
 130 #define encode_setclientid_confirm_maxsz \
 131                                 (op_encode_hdr_maxsz + \
 132                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 133 #define decode_setclientid_confirm_maxsz \
 134                                 (op_decode_hdr_maxsz)
 135 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 136 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 137 #define encode_share_access_maxsz \
 138                                 (2)
 139 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 140 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 141 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 142 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 143                                 2 + encode_share_access_maxsz + 2 + \
 144                                 open_owner_id_maxsz + \
 145                                 encode_opentype_maxsz + \
 146                                 encode_claim_null_maxsz)
 147 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 148 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 149                                 decode_ace_maxsz)
 150 #define decode_change_info_maxsz        (5)
 151 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 152                                 decode_stateid_maxsz + \
 153                                 decode_change_info_maxsz + 1 + \
 154                                 nfs4_fattr_bitmap_maxsz + \
 155                                 decode_delegation_maxsz)
 156 #define encode_open_confirm_maxsz \
 157                                 (op_encode_hdr_maxsz + \
 158                                  encode_stateid_maxsz + 1)
 159 #define decode_open_confirm_maxsz \
 160                                 (op_decode_hdr_maxsz + \
 161                                  decode_stateid_maxsz)
 162 #define encode_open_downgrade_maxsz \
 163                                 (op_encode_hdr_maxsz + \
 164                                  encode_stateid_maxsz + 1 + \
 165                                  encode_share_access_maxsz)
 166 #define decode_open_downgrade_maxsz \
 167                                 (op_decode_hdr_maxsz + \
 168                                  decode_stateid_maxsz)
 169 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 170                                  1 + encode_stateid_maxsz)
 171 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 172                                  decode_stateid_maxsz)
 173 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 174                                  encode_stateid_maxsz + \
 175                                  encode_attrs_maxsz)
 176 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 177                                  nfs4_fattr_bitmap_maxsz)
 178 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + 3)
 180 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 181 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 182                                  2 + encode_verifier_maxsz + 5)
 183 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 184                                  decode_verifier_maxsz)
 185 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 186 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 187 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 188                                  encode_stateid_maxsz + 4)
 189 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 190                                  2 + decode_verifier_maxsz)
 191 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 192 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 193                                  decode_verifier_maxsz)
 194 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 195                                 nfs4_name_maxsz)
 196 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 197                                  decode_change_info_maxsz)
 198 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 199                                 2 * nfs4_name_maxsz)
 200 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 201                                  decode_change_info_maxsz + \
 202                                  decode_change_info_maxsz)
 203 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 204                                 nfs4_name_maxsz)
 205 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 206 #define encode_lockowner_maxsz  (7)
 207 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 208                                  7 + \
 209                                  1 + encode_stateid_maxsz + 1 + \
 210                                  encode_lockowner_maxsz)
 211 #define decode_lock_denied_maxsz \
 212                                 (8 + decode_lockowner_maxsz)
 213 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 216                                 encode_lockowner_maxsz)
 217 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 218                                  decode_lock_denied_maxsz)
 219 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 220                                  encode_stateid_maxsz + \
 221                                  4)
 222 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 223                                  decode_stateid_maxsz)
 224 #define encode_release_lockowner_maxsz \
 225                                 (op_encode_hdr_maxsz + \
 226                                  encode_lockowner_maxsz)
 227 #define decode_release_lockowner_maxsz \
 228                                 (op_decode_hdr_maxsz)
 229 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 230 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 231 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 232                                 1 + nfs4_name_maxsz + \
 233                                 1 + \
 234                                 nfs4_fattr_maxsz)
 235 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 236 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 237                                 1 + 2 + nfs4_name_maxsz + \
 238                                 encode_attrs_maxsz)
 239 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 240                                 decode_change_info_maxsz + \
 241                                 nfs4_fattr_bitmap_maxsz)
 242 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 243 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 244 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 245 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 246 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 247 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 248                                  nfs4_fattr_bitmap_maxsz + 1)
 249 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 250                                  encode_stateid_maxsz + 3)
 251 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 252 #define encode_fs_locations_maxsz \
 253                                 (encode_getattr_maxsz)
 254 #define decode_fs_locations_maxsz \
 255                                 (0)
 256
 257 #if defined(CONFIG_NFS_V4_1)
 258 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 259
 260 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 261                                 encode_verifier_maxsz + \
 262                                 1 /* co_ownerid.len */ + \
 263                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 264                                 1 /* flags */ + \
 265                                 1 /* spa_how */ + \
 266                                 0 /* SP4_NONE (for now) */ + \
 267                                 1 /* zero implemetation id array */)
 268 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 269                                 2 /* eir_clientid */ + \
 270                                 1 /* eir_sequenceid */ + \
 271                                 1 /* eir_flags */ + \
 272                                 1 /* spr_how */ + \
 273                                 0 /* SP4_NONE (for now) */ + \
 274                                 2 /* eir_server_owner.so_minor_id */ + \
 275                                 /* eir_server_owner.so_major_id<> */ \
 276                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 277                                 /* eir_server_scope<> */ \
 278                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 279                                 1 /* eir_server_impl_id array length */ + \
 280                                 0 /* ignored eir_server_impl_id contents */)
 281 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 282 #define decode_channel_attrs_maxsz  (6 + \
 283                                      1 /* ca_rdma_ird.len */ + \
 284                                      1 /* ca_rdma_ird */)
 285 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 286                                      2 /* csa_clientid */ + \
 287                                      1 /* csa_sequence */ + \
 288                                      1 /* csa_flags */ + \
 289                                      encode_channel_attrs_maxsz + \
 290                                      encode_channel_attrs_maxsz + \
 291                                      1 /* csa_cb_program */ + \
 292                                      1 /* csa_sec_parms.len (1) */ + \
 293                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 294                                      1 /* stamp */ + \
 295                                      1 /* machinename.len */ + \
 296                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 297                                      1 /* uid */ + \
 298                                      1 /* gid */ + \
 299                                      1 /* gids.len (0) */)
 300 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 301                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 302                                      1 /* csr_sequence */ + \
 303                                      1 /* csr_flags */ + \
 304                                      decode_channel_attrs_maxsz + \
 305                                      decode_channel_attrs_maxsz)
 306 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 307 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 308 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 309                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 310 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 311                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 312 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 313 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 314 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 315                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 316 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 317                                 1 /* layout type */ + \
 318                                 1 /* opaque devaddr4 length */ + \
 319                                   /* devaddr4 payload is read into page */ \
 320                                 1 /* notification bitmap length */ + \
 321                                 1 /* notification bitmap */)
 322 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 323                                 encode_stateid_maxsz)
 324 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 325                                 decode_stateid_maxsz + \
 326                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 327 #else /* CONFIG_NFS_V4_1 */
 328 #define encode_sequence_maxsz   0
 329 #define decode_sequence_maxsz   0
 330 #endif /* CONFIG_NFS_V4_1 */
 331
 332 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 333 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 334 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_read_maxsz)
 338 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 339                                 decode_sequence_maxsz + \
 340                                 decode_putfh_maxsz + \
 341                                 decode_read_maxsz)
 342 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 343                                 encode_sequence_maxsz + \
 344                                 encode_putfh_maxsz + \
 345                                 encode_readlink_maxsz)
 346 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 347                                 decode_sequence_maxsz + \
 348                                 decode_putfh_maxsz + \
 349                                 decode_readlink_maxsz)
 350 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 351                                 encode_sequence_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_readdir_maxsz)
 354 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 355                                 decode_sequence_maxsz + \
 356                                 decode_putfh_maxsz + \
 357                                 decode_readdir_maxsz)
 358 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 359                                 encode_sequence_maxsz + \
 360                                 encode_putfh_maxsz + \
 361                                 encode_write_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_write_maxsz + \
 367                                 decode_getattr_maxsz)
 368 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 369                                 encode_sequence_maxsz + \
 370                                 encode_putfh_maxsz + \
 371                                 encode_commit_maxsz + \
 372                                 encode_getattr_maxsz)
 373 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 374                                 decode_sequence_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_commit_maxsz + \
 377                                 decode_getattr_maxsz)
 378 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 379                                 encode_sequence_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_savefh_maxsz + \
 382                                 encode_open_maxsz + \
 383                                 encode_getfh_maxsz + \
 384                                 encode_getattr_maxsz + \
 385                                 encode_restorefh_maxsz + \
 386                                 encode_getattr_maxsz)
 387 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 388                                 decode_sequence_maxsz + \
 389                                 decode_putfh_maxsz + \
 390                                 decode_savefh_maxsz + \
 391                                 decode_open_maxsz + \
 392                                 decode_getfh_maxsz + \
 393                                 decode_getattr_maxsz + \
 394                                 decode_restorefh_maxsz + \
 395                                 decode_getattr_maxsz)
 396 #define NFS4_enc_open_confirm_sz \
 397                                 (compound_encode_hdr_maxsz + \
 398                                  encode_putfh_maxsz + \
 399                                  encode_open_confirm_maxsz)
 400 #define NFS4_dec_open_confirm_sz \
 401                                 (compound_decode_hdr_maxsz + \
 402                                  decode_putfh_maxsz + \
 403                                  decode_open_confirm_maxsz)
 404 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 405                                         encode_sequence_maxsz + \
 406                                         encode_putfh_maxsz + \
 407                                         encode_open_maxsz + \
 408                                         encode_getattr_maxsz)
 409 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 410                                         decode_sequence_maxsz + \
 411                                         decode_putfh_maxsz + \
 412                                         decode_open_maxsz + \
 413                                         decode_getattr_maxsz)
 414 #define NFS4_enc_open_downgrade_sz \
 415                                 (compound_encode_hdr_maxsz + \
 416                                  encode_sequence_maxsz + \
 417                                  encode_putfh_maxsz + \
 418                                  encode_open_downgrade_maxsz + \
 419                                  encode_getattr_maxsz)
 420 #define NFS4_dec_open_downgrade_sz \
 421                                 (compound_decode_hdr_maxsz + \
 422                                  decode_sequence_maxsz + \
 423                                  decode_putfh_maxsz + \
 424                                  decode_open_downgrade_maxsz + \
 425                                  decode_getattr_maxsz)
 426 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 427                                  encode_sequence_maxsz + \
 428                                  encode_putfh_maxsz + \
 429                                  encode_close_maxsz + \
 430                                  encode_getattr_maxsz)
 431 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 432                                  decode_sequence_maxsz + \
 433                                  decode_putfh_maxsz + \
 434                                  decode_close_maxsz + \
 435                                  decode_getattr_maxsz)
 436 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 437                                  encode_sequence_maxsz + \
 438                                  encode_putfh_maxsz + \
 439                                  encode_setattr_maxsz + \
 440                                  encode_getattr_maxsz)
 441 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 442                                  decode_sequence_maxsz + \
 443                                  decode_putfh_maxsz + \
 444                                  decode_setattr_maxsz + \
 445                                  decode_getattr_maxsz)
 446 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 447                                 encode_sequence_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_fsinfo_maxsz)
 450 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 451                                 decode_sequence_maxsz + \
 452                                 decode_putfh_maxsz + \
 453                                 decode_fsinfo_maxsz)
 454 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 455                                 encode_renew_maxsz)
 456 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 457                                 decode_renew_maxsz)
 458 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 459                                 encode_setclientid_maxsz)
 460 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 461                                 decode_setclientid_maxsz)
 462 #define NFS4_enc_setclientid_confirm_sz \
 463                                 (compound_encode_hdr_maxsz + \
 464                                 encode_setclientid_confirm_maxsz + \
 465                                 encode_putrootfh_maxsz + \
 466                                 encode_fsinfo_maxsz)
 467 #define NFS4_dec_setclientid_confirm_sz \
 468                                 (compound_decode_hdr_maxsz + \
 469                                 decode_setclientid_confirm_maxsz + \
 470                                 decode_putrootfh_maxsz + \
 471                                 decode_fsinfo_maxsz)
 472 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_lock_maxsz)
 476 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putfh_maxsz + \
 479                                 decode_lock_maxsz)
 480 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 481                                 encode_sequence_maxsz + \
 482                                 encode_putfh_maxsz + \
 483                                 encode_lockt_maxsz)
 484 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 485                                  decode_sequence_maxsz + \
 486                                  decode_putfh_maxsz + \
 487                                  decode_lockt_maxsz)
 488 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_locku_maxsz)
 492 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 493                                 decode_sequence_maxsz + \
 494                                 decode_putfh_maxsz + \
 495                                 decode_locku_maxsz)
 496 #define NFS4_enc_release_lockowner_sz \
 497                                 (compound_encode_hdr_maxsz + \
 498                                  encode_lockowner_maxsz)
 499 #define NFS4_dec_release_lockowner_sz \
 500                                 (compound_decode_hdr_maxsz + \
 501                                  decode_lockowner_maxsz)
 502 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putfh_maxsz + \
 505                                 encode_access_maxsz + \
 506                                 encode_getattr_maxsz)
 507 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putfh_maxsz + \
 510                                 decode_access_maxsz + \
 511                                 decode_getattr_maxsz)
 512 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_getattr_maxsz)
 516 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 517                                 decode_sequence_maxsz + \
 518                                 decode_putfh_maxsz + \
 519                                 decode_getattr_maxsz)
 520 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 521                                 encode_sequence_maxsz + \
 522                                 encode_putfh_maxsz + \
 523                                 encode_lookup_maxsz + \
 524                                 encode_getattr_maxsz + \
 525                                 encode_getfh_maxsz)
 526 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 527                                 decode_sequence_maxsz + \
 528                                 decode_putfh_maxsz + \
 529                                 decode_lookup_maxsz + \
 530                                 decode_getattr_maxsz + \
 531                                 decode_getfh_maxsz)
 532 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 533                                 encode_sequence_maxsz + \
 534                                 encode_putrootfh_maxsz + \
 535                                 encode_getattr_maxsz + \
 536                                 encode_getfh_maxsz)
 537 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 538                                 decode_sequence_maxsz + \
 539                                 decode_putrootfh_maxsz + \
 540                                 decode_getattr_maxsz + \
 541                                 decode_getfh_maxsz)
 542 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 543                                 encode_sequence_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_remove_maxsz + \
 546                                 encode_getattr_maxsz)
 547 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 548                                 decode_sequence_maxsz + \
 549                                 decode_putfh_maxsz + \
 550                                 decode_remove_maxsz + \
 551                                 decode_getattr_maxsz)
 552 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 553                                 encode_sequence_maxsz + \
 554                                 encode_putfh_maxsz + \
 555                                 encode_savefh_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_rename_maxsz + \
 558                                 encode_getattr_maxsz + \
 559                                 encode_restorefh_maxsz + \
 560                                 encode_getattr_maxsz)
 561 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_savefh_maxsz + \
 565                                 decode_putfh_maxsz + \
 566                                 decode_rename_maxsz + \
 567                                 decode_getattr_maxsz + \
 568                                 decode_restorefh_maxsz + \
 569                                 decode_getattr_maxsz)
 570 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_putfh_maxsz + \
 575                                 encode_link_maxsz + \
 576                                 decode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 decode_getattr_maxsz)
 579 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_link_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_symlink_maxsz + \
 592                                 encode_getattr_maxsz + \
 593                                 encode_getfh_maxsz)
 594 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_symlink_maxsz + \
 598                                 decode_getattr_maxsz + \
 599                                 decode_getfh_maxsz)
 600 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 601                                 encode_sequence_maxsz + \
 602                                 encode_putfh_maxsz + \
 603                                 encode_savefh_maxsz + \
 604                                 encode_create_maxsz + \
 605                                 encode_getfh_maxsz + \
 606                                 encode_getattr_maxsz + \
 607                                 encode_restorefh_maxsz + \
 608                                 encode_getattr_maxsz)
 609 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_savefh_maxsz + \
 613                                 decode_create_maxsz + \
 614                                 decode_getfh_maxsz + \
 615                                 decode_getattr_maxsz + \
 616                                 decode_restorefh_maxsz + \
 617                                 decode_getattr_maxsz)
 618 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 619                                 encode_sequence_maxsz + \
 620                                 encode_putfh_maxsz + \
 621                                 encode_getattr_maxsz)
 622 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putfh_maxsz + \
 625                                 decode_getattr_maxsz)
 626 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 627                                 encode_sequence_maxsz + \
 628                                 encode_putfh_maxsz + \
 629                                 encode_statfs_maxsz)
 630 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 631                                 decode_sequence_maxsz + \
 632                                 decode_putfh_maxsz + \
 633                                 decode_statfs_maxsz)
 634 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 635                                 encode_sequence_maxsz + \
 636                                 encode_putfh_maxsz + \
 637                                 encode_getattr_maxsz)
 638 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 639                                 decode_sequence_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_getattr_maxsz)
 642 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 643                                 encode_sequence_maxsz + \
 644                                 encode_putfh_maxsz + \
 645                                 encode_delegreturn_maxsz + \
 646                                 encode_getattr_maxsz)
 647 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 648                                 decode_sequence_maxsz + \
 649                                 decode_delegreturn_maxsz + \
 650                                 decode_getattr_maxsz)
 651 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_getacl_maxsz)
 655 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 656                                 decode_sequence_maxsz + \
 657                                 decode_putfh_maxsz + \
 658                                 decode_getacl_maxsz)
 659 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 660                                 encode_sequence_maxsz + \
 661                                 encode_putfh_maxsz + \
 662                                 encode_setacl_maxsz)
 663 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 664                                 decode_sequence_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_setacl_maxsz)
 667 #define NFS4_enc_fs_locations_sz \
 668                                 (compound_encode_hdr_maxsz + \
 669                                  encode_sequence_maxsz + \
 670                                  encode_putfh_maxsz + \
 671                                  encode_lookup_maxsz + \
 672                                  encode_fs_locations_maxsz)
 673 #define NFS4_dec_fs_locations_sz \
 674                                 (compound_decode_hdr_maxsz + \
 675                                  decode_sequence_maxsz + \
 676                                  decode_putfh_maxsz + \
 677                                  decode_lookup_maxsz + \
 678                                  decode_fs_locations_maxsz)
 679 #if defined(CONFIG_NFS_V4_1)
 680 #define NFS4_enc_exchange_id_sz \
 681                                 (compound_encode_hdr_maxsz + \
 682                                  encode_exchange_id_maxsz)
 683 #define NFS4_dec_exchange_id_sz \
 684                                 (compound_decode_hdr_maxsz + \
 685                                  decode_exchange_id_maxsz)
 686 #define NFS4_enc_create_session_sz \
 687                                 (compound_encode_hdr_maxsz + \
 688                                  encode_create_session_maxsz)
 689 #define NFS4_dec_create_session_sz \
 690                                 (compound_decode_hdr_maxsz + \
 691                                  decode_create_session_maxsz)
 692 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 693                                          encode_destroy_session_maxsz)
 694 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 695                                          decode_destroy_session_maxsz)
 696 #define NFS4_enc_sequence_sz \
 697                                 (compound_decode_hdr_maxsz + \
 698                                  encode_sequence_maxsz)
 699 #define NFS4_dec_sequence_sz \
 700                                 (compound_decode_hdr_maxsz + \
 701                                  decode_sequence_maxsz)
 702 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 703                                          encode_sequence_maxsz + \
 704                                          encode_putrootfh_maxsz + \
 705                                          encode_fsinfo_maxsz)
 706 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 707                                          decode_sequence_maxsz + \
 708                                          decode_putrootfh_maxsz + \
 709                                          decode_fsinfo_maxsz)
 710 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 711                                          encode_sequence_maxsz + \
 712                                          encode_reclaim_complete_maxsz)
 713 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 714                                          decode_sequence_maxsz + \
 715                                          decode_reclaim_complete_maxsz)
 716 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 717                                 encode_sequence_maxsz +\
 718                                 encode_getdeviceinfo_maxsz)
 719 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 720                                 decode_sequence_maxsz + \
 721                                 decode_getdeviceinfo_maxsz)
 722 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 723                                 encode_sequence_maxsz + \
 724                                 encode_putfh_maxsz +        \
 725                                 encode_layoutget_maxsz)
 726 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 727                                 decode_sequence_maxsz + \
 728                                 decode_putfh_maxsz +        \
 729                                 decode_layoutget_maxsz)
 730
 731 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 732                                       compound_encode_hdr_maxsz +
 733                                       encode_sequence_maxsz +
 734                                       encode_putfh_maxsz +
 735                                       encode_getattr_maxsz) *
 736                                      XDR_UNIT);
 737
 738 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 739                                      compound_decode_hdr_maxsz +
 740                                      decode_sequence_maxsz +
 741                                      decode_putfh_maxsz) *
 742                                     XDR_UNIT);
 743 #endif /* CONFIG_NFS_V4_1 */
 744
 745 static const umode_t nfs_type2fmt[] = {
 746         [NF4BAD] = 0,
 747         [NF4REG] = S_IFREG,
 748         [NF4DIR] = S_IFDIR,
 749         [NF4BLK] = S_IFBLK,
 750         [NF4CHR] = S_IFCHR,
 751         [NF4LNK] = S_IFLNK,
 752         [NF4SOCK] = S_IFSOCK,
 753         [NF4FIFO] = S_IFIFO,
 754         [NF4ATTRDIR] = 0,
 755         [NF4NAMEDATTR] = 0,
 756 };
 757
 758 struct compound_hdr {
 759         int32_t         status;
 760         uint32_t        nops;
 761         __be32 *        nops_p;
 762         uint32_t        taglen;
 763         char *          tag;
 764         uint32_t        replen;         /* expected reply words */
 765         u32             minorversion;
 766 };
 767
 768 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 769 {
 770         __be32 *p = xdr_reserve_space(xdr, nbytes);
 771         BUG_ON(!p);
 772         return p;
 773 }
 774
 775 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 776 {
 777         __be32 *p;
 778
 779         p = xdr_reserve_space(xdr, 4 + len);
 780         BUG_ON(p == NULL);
 781         xdr_encode_opaque(p, str, len);
 782 }
 783
 784 static void encode_compound_hdr(struct xdr_stream *xdr,
 785                                 struct rpc_rqst *req,
 786                                 struct compound_hdr *hdr)
 787 {
 788         __be32 *p;
 789         struct rpc_auth *auth = req->rq_cred->cr_auth;
 790
 791         /* initialize running count of expected bytes in reply.
 792          * NOTE: the replied tag SHOULD be the same is the one sent,
 793          * but this is not required as a MUST for the server to do so. */
 794         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 795
 796         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 797         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 798         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 799         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 800         *p++ = cpu_to_be32(hdr->minorversion);
 801         hdr->nops_p = p;
 802         *p = cpu_to_be32(hdr->nops);
 803 }
 804
 805 static void encode_nops(struct compound_hdr *hdr)
 806 {
 807         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 808         *hdr->nops_p = htonl(hdr->nops);
 809 }
 810
 811 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 812 {
 813         __be32 *p;
 814
 815         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 816         BUG_ON(p == NULL);
 817         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 818 }
 819
 820 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 821 {
 822         char owner_name[IDMAP_NAMESZ];
 823         char owner_group[IDMAP_NAMESZ];
 824         int owner_namelen = 0;
 825         int owner_grouplen = 0;
 826         __be32 *p;
 827         __be32 *q;
 828         int len;
 829         uint32_t bmval0 = 0;
 830         uint32_t bmval1 = 0;
 831
 832         /*
 833          * We reserve enough space to write the entire attribute buffer at once.
 834          * In the worst-case, this would be
 835          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 836          *          = 36 bytes, plus any contribution from variable-length fields
 837          *            such as owner/group.
 838          */
 839         len = 16;
 840
 841         /* Sigh */
 842         if (iap->ia_valid & ATTR_SIZE)
 843                 len += 8;
 844         if (iap->ia_valid & ATTR_MODE)
 845                 len += 4;
 846         if (iap->ia_valid & ATTR_UID) {
 847                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 848                 if (owner_namelen < 0) {
 849                         dprintk("nfs: couldn't resolve uid %d to string\n",
 850                                         iap->ia_uid);
 851                         /* XXX */
 852                         strcpy(owner_name, "nobody");
 853                         owner_namelen = sizeof("nobody") - 1;
 854                         /* goto out; */
 855                 }
 856                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 857         }
 858         if (iap->ia_valid & ATTR_GID) {
 859                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 860                 if (owner_grouplen < 0) {
 861                         dprintk("nfs: couldn't resolve gid %d to string\n",
 862                                         iap->ia_gid);
 863                         strcpy(owner_group, "nobody");
 864                         owner_grouplen = sizeof("nobody") - 1;
 865                         /* goto out; */
 866                 }
 867                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 868         }
 869         if (iap->ia_valid & ATTR_ATIME_SET)
 870                 len += 16;
 871         else if (iap->ia_valid & ATTR_ATIME)
 872                 len += 4;
 873         if (iap->ia_valid & ATTR_MTIME_SET)
 874                 len += 16;
 875         else if (iap->ia_valid & ATTR_MTIME)
 876                 len += 4;
 877         p = reserve_space(xdr, len);
 878
 879         /*
 880          * We write the bitmap length now, but leave the bitmap and the attribute
 881          * buffer length to be backfilled at the end of this routine.
 882          */
 883         *p++ = cpu_to_be32(2);
 884         q = p;
 885         p += 3;
 886
 887         if (iap->ia_valid & ATTR_SIZE) {
 888                 bmval0 |= FATTR4_WORD0_SIZE;
 889                 p = xdr_encode_hyper(p, iap->ia_size);
 890         }
 891         if (iap->ia_valid & ATTR_MODE) {
 892                 bmval1 |= FATTR4_WORD1_MODE;
 893                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 894         }
 895         if (iap->ia_valid & ATTR_UID) {
 896                 bmval1 |= FATTR4_WORD1_OWNER;
 897                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 898         }
 899         if (iap->ia_valid & ATTR_GID) {
 900                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 901                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 902         }
 903         if (iap->ia_valid & ATTR_ATIME_SET) {
 904                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 905                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 906                 *p++ = cpu_to_be32(0);
 907                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 908                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 909         }
 910         else if (iap->ia_valid & ATTR_ATIME) {
 911                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 912                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 913         }
 914         if (iap->ia_valid & ATTR_MTIME_SET) {
 915                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 916                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 917                 *p++ = cpu_to_be32(0);
 918                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 919                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 920         }
 921         else if (iap->ia_valid & ATTR_MTIME) {
 922                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 923                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 924         }
 925
 926         /*
 927          * Now we backfill the bitmap and the attribute buffer length.
 928          */
 929         if (len != ((char *)p - (char *)q) + 4) {
 930                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 931                                 len, ((char *)p - (char *)q) + 4);
 932                 BUG();
 933         }
 934         len = (char *)p - (char *)q - 12;
 935         *q++ = htonl(bmval0);
 936         *q++ = htonl(bmval1);
 937         *q = htonl(len);
 938
 939 /* out: */
 940 }
 941
 942 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 943 {
 944         __be32 *p;
 945
 946         p = reserve_space(xdr, 8);
 947         *p++ = cpu_to_be32(OP_ACCESS);
 948         *p = cpu_to_be32(access);
 949         hdr->nops++;
 950         hdr->replen += decode_access_maxsz;
 951 }
 952
 953 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 954 {
 955         __be32 *p;
 956
 957         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 958         *p++ = cpu_to_be32(OP_CLOSE);
 959         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 960         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 961         hdr->nops++;
 962         hdr->replen += decode_close_maxsz;
 963 }
 964
 965 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 966 {
 967         __be32 *p;
 968
 969         p = reserve_space(xdr, 16);
 970         *p++ = cpu_to_be32(OP_COMMIT);
 971         p = xdr_encode_hyper(p, args->offset);
 972         *p = cpu_to_be32(args->count);
 973         hdr->nops++;
 974         hdr->replen += decode_commit_maxsz;
 975 }
 976
 977 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 978 {
 979         __be32 *p;
 980
 981         p = reserve_space(xdr, 8);
 982         *p++ = cpu_to_be32(OP_CREATE);
 983         *p = cpu_to_be32(create->ftype);
 984
 985         switch (create->ftype) {
 986         case NF4LNK:
 987                 p = reserve_space(xdr, 4);
 988                 *p = cpu_to_be32(create->u.symlink.len);
 989                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 990                 break;
 991
 992         case NF4BLK: case NF4CHR:
 993                 p = reserve_space(xdr, 8);
 994                 *p++ = cpu_to_be32(create->u.device.specdata1);
 995                 *p = cpu_to_be32(create->u.device.specdata2);
 996                 break;
 997
 998         default:
 999                 break;
1000         }
1001
1002         encode_string(xdr, create->name->len, create->name->name);
1003         hdr->nops++;
1004         hdr->replen += decode_create_maxsz;
1005
1006         encode_attrs(xdr, create->attrs, create->server);
1007 }
1008
1009 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1010 {
1011         __be32 *p;
1012
1013         p = reserve_space(xdr, 12);
1014         *p++ = cpu_to_be32(OP_GETATTR);
1015         *p++ = cpu_to_be32(1);
1016         *p = cpu_to_be32(bitmap);
1017         hdr->nops++;
1018         hdr->replen += decode_getattr_maxsz;
1019 }
1020
1021 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1022 {
1023         __be32 *p;
1024
1025         p = reserve_space(xdr, 16);
1026         *p++ = cpu_to_be32(OP_GETATTR);
1027         *p++ = cpu_to_be32(2);
1028         *p++ = cpu_to_be32(bm0);
1029         *p = cpu_to_be32(bm1);
1030         hdr->nops++;
1031         hdr->replen += decode_getattr_maxsz;
1032 }
1033
1034 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1035 {
1036         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1037                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1038 }
1039
1040 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1041 {
1042         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1043                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1044 }
1045
1046 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1047 {
1048         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1049                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1050 }
1051
1052 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1053 {
1054         __be32 *p;
1055
1056         p = reserve_space(xdr, 4);
1057         *p = cpu_to_be32(OP_GETFH);
1058         hdr->nops++;
1059         hdr->replen += decode_getfh_maxsz;
1060 }
1061
1062 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1063 {
1064         __be32 *p;
1065
1066         p = reserve_space(xdr, 8 + name->len);
1067         *p++ = cpu_to_be32(OP_LINK);
1068         xdr_encode_opaque(p, name->name, name->len);
1069         hdr->nops++;
1070         hdr->replen += decode_link_maxsz;
1071 }
1072
1073 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1074 {
1075         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1076                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1077         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1078 }
1079
1080 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1081 {
1082         if (fl->fl_end == OFFSET_MAX)
1083                 return ~(uint64_t)0;
1084         return fl->fl_end - fl->fl_start + 1;
1085 }
1086
1087 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1088 {
1089         __be32 *p;
1090
1091         p = reserve_space(xdr, 32);
1092         p = xdr_encode_hyper(p, lowner->clientid);
1093         *p++ = cpu_to_be32(20);
1094         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1095         *p++ = cpu_to_be32(lowner->s_dev);
1096         xdr_encode_hyper(p, lowner->id);
1097 }
1098
1099 /*
1100  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1101  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1102  */
1103 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1104 {
1105         __be32 *p;
1106
1107         p = reserve_space(xdr, 32);
1108         *p++ = cpu_to_be32(OP_LOCK);
1109         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1110         *p++ = cpu_to_be32(args->reclaim);
1111         p = xdr_encode_hyper(p, args->fl->fl_start);
1112         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1113         *p = cpu_to_be32(args->new_lock_owner);
1114         if (args->new_lock_owner){
1115                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1116                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1117                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1118                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1119                 encode_lockowner(xdr, &args->lock_owner);
1120         }
1121         else {
1122                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1123                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1124                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1125         }
1126         hdr->nops++;
1127         hdr->replen += decode_lock_maxsz;
1128 }
1129
1130 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1131 {
1132         __be32 *p;
1133
1134         p = reserve_space(xdr, 24);
1135         *p++ = cpu_to_be32(OP_LOCKT);
1136         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1137         p = xdr_encode_hyper(p, args->fl->fl_start);
1138         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1139         encode_lockowner(xdr, &args->lock_owner);
1140         hdr->nops++;
1141         hdr->replen += decode_lockt_maxsz;
1142 }
1143
1144 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1145 {
1146         __be32 *p;
1147
1148         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1149         *p++ = cpu_to_be32(OP_LOCKU);
1150         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1151         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1152         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1153         p = xdr_encode_hyper(p, args->fl->fl_start);
1154         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1155         hdr->nops++;
1156         hdr->replen += decode_locku_maxsz;
1157 }
1158
1159 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1160 {
1161         __be32 *p;
1162
1163         p = reserve_space(xdr, 4);
1164         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1165         encode_lockowner(xdr, lowner);
1166         hdr->nops++;
1167         hdr->replen += decode_release_lockowner_maxsz;
1168 }
1169
1170 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1171 {
1172         int len = name->len;
1173         __be32 *p;
1174
1175         p = reserve_space(xdr, 8 + len);
1176         *p++ = cpu_to_be32(OP_LOOKUP);
1177         xdr_encode_opaque(p, name->name, len);
1178         hdr->nops++;
1179         hdr->replen += decode_lookup_maxsz;
1180 }
1181
1182 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1183 {
1184         __be32 *p;
1185
1186         p = reserve_space(xdr, 8);
1187         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1188         case FMODE_READ:
1189                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1190                 break;
1191         case FMODE_WRITE:
1192                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1193                 break;
1194         case FMODE_READ|FMODE_WRITE:
1195                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1196                 break;
1197         default:
1198                 *p++ = cpu_to_be32(0);
1199         }
1200         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1201 }
1202
1203 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1204 {
1205         __be32 *p;
1206  /*
1207  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1208  * owner 4 = 32
1209  */
1210         p = reserve_space(xdr, 8);
1211         *p++ = cpu_to_be32(OP_OPEN);
1212         *p = cpu_to_be32(arg->seqid->sequence->counter);
1213         encode_share_access(xdr, arg->fmode);
1214         p = reserve_space(xdr, 32);
1215         p = xdr_encode_hyper(p, arg->clientid);
1216         *p++ = cpu_to_be32(20);
1217         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1218         *p++ = cpu_to_be32(arg->server->s_dev);
1219         xdr_encode_hyper(p, arg->id);
1220 }
1221
1222 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1223 {
1224         __be32 *p;
1225         struct nfs_client *clp;
1226
1227         p = reserve_space(xdr, 4);
1228         switch(arg->open_flags & O_EXCL) {
1229         case 0:
1230                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1231                 encode_attrs(xdr, arg->u.attrs, arg->server);
1232                 break;
1233         default:
1234                 clp = arg->server->nfs_client;
1235                 if (clp->cl_mvops->minor_version > 0) {
1236                         if (nfs4_has_persistent_session(clp)) {
1237                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1238                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1239                         } else {
1240                                 struct iattr dummy;
1241
1242                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1243                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1244                                 dummy.ia_valid = 0;
1245                                 encode_attrs(xdr, &dummy, arg->server);
1246                         }
1247                 } else {
1248                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1249                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1250                 }
1251         }
1252 }
1253
1254 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1255 {
1256         __be32 *p;
1257
1258         p = reserve_space(xdr, 4);
1259         switch (arg->open_flags & O_CREAT) {
1260         case 0:
1261                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1262                 break;
1263         default:
1264                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1265                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1266                 encode_createmode(xdr, arg);
1267         }
1268 }
1269
1270 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1271 {
1272         __be32 *p;
1273
1274         p = reserve_space(xdr, 4);
1275         switch (delegation_type) {
1276         case 0:
1277                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1278                 break;
1279         case FMODE_READ:
1280                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1281                 break;
1282         case FMODE_WRITE|FMODE_READ:
1283                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1284                 break;
1285         default:
1286                 BUG();
1287         }
1288 }
1289
1290 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1291 {
1292         __be32 *p;
1293
1294         p = reserve_space(xdr, 4);
1295         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1296         encode_string(xdr, name->len, name->name);
1297 }
1298
1299 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1300 {
1301         __be32 *p;
1302
1303         p = reserve_space(xdr, 4);
1304         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1305         encode_delegation_type(xdr, type);
1306 }
1307
1308 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1309 {
1310         __be32 *p;
1311
1312         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1313         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1314         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1315         encode_string(xdr, name->len, name->name);
1316 }
1317
1318 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1319 {
1320         encode_openhdr(xdr, arg);
1321         encode_opentype(xdr, arg);
1322         switch (arg->claim) {
1323         case NFS4_OPEN_CLAIM_NULL:
1324                 encode_claim_null(xdr, arg->name);
1325                 break;
1326         case NFS4_OPEN_CLAIM_PREVIOUS:
1327                 encode_claim_previous(xdr, arg->u.delegation_type);
1328                 break;
1329         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1330                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1331                 break;
1332         default:
1333                 BUG();
1334         }
1335         hdr->nops++;
1336         hdr->replen += decode_open_maxsz;
1337 }
1338
1339 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1340 {
1341         __be32 *p;
1342
1343         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1344         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1345         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1346         *p = cpu_to_be32(arg->seqid->sequence->counter);
1347         hdr->nops++;
1348         hdr->replen += decode_open_confirm_maxsz;
1349 }
1350
1351 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1352 {
1353         __be32 *p;
1354
1355         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1356         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1357         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1358         *p = cpu_to_be32(arg->seqid->sequence->counter);
1359         encode_share_access(xdr, arg->fmode);
1360         hdr->nops++;
1361         hdr->replen += decode_open_downgrade_maxsz;
1362 }
1363
1364 static void
1365 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1366 {
1367         int len = fh->size;
1368         __be32 *p;
1369
1370         p = reserve_space(xdr, 8 + len);
1371         *p++ = cpu_to_be32(OP_PUTFH);
1372         xdr_encode_opaque(p, fh->data, len);
1373         hdr->nops++;
1374         hdr->replen += decode_putfh_maxsz;
1375 }
1376
1377 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1378 {
1379         __be32 *p;
1380
1381         p = reserve_space(xdr, 4);
1382         *p = cpu_to_be32(OP_PUTROOTFH);
1383         hdr->nops++;
1384         hdr->replen += decode_putrootfh_maxsz;
1385 }
1386
1387 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1388 {
1389         nfs4_stateid stateid;
1390         __be32 *p;
1391
1392         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1393         if (ctx->state != NULL) {
1394                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1395                 if (zero_seqid)
1396                         stateid.stateid.seqid = 0;
1397                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1398         } else
1399                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1400 }
1401
1402 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1403 {
1404         __be32 *p;
1405
1406         p = reserve_space(xdr, 4);
1407         *p = cpu_to_be32(OP_READ);
1408
1409         encode_stateid(xdr, args->context, args->lock_context,
1410                        hdr->minorversion);
1411
1412         p = reserve_space(xdr, 12);
1413         p = xdr_encode_hyper(p, args->offset);
1414         *p = cpu_to_be32(args->count);
1415         hdr->nops++;
1416         hdr->replen += decode_read_maxsz;
1417 }
1418
1419 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1420 {
1421         uint32_t attrs[2] = {0, 0};
1422         uint32_t dircount = readdir->count >> 1;
1423         __be32 *p;
1424
1425         if (readdir->plus) {
1426                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1427                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1428                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1429                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1430                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1431                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1432                 dircount >>= 1;
1433         }
1434         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1435         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1436         /* Switch to mounted_on_fileid if the server supports it */
1437         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1438                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1439         else
1440                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1441
1442         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1443         *p++ = cpu_to_be32(OP_READDIR);
1444         p = xdr_encode_hyper(p, readdir->cookie);
1445         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1446         *p++ = cpu_to_be32(dircount);
1447         *p++ = cpu_to_be32(readdir->count);
1448         *p++ = cpu_to_be32(2);
1449
1450         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1451         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1452         hdr->nops++;
1453         hdr->replen += decode_readdir_maxsz;
1454         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1455                         __func__,
1456                         (unsigned long long)readdir->cookie,
1457                         ((u32 *)readdir->verifier.data)[0],
1458                         ((u32 *)readdir->verifier.data)[1],
1459                         attrs[0] & readdir->bitmask[0],
1460                         attrs[1] & readdir->bitmask[1]);
1461 }
1462
1463 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1464 {
1465         __be32 *p;
1466
1467         p = reserve_space(xdr, 4);
1468         *p = cpu_to_be32(OP_READLINK);
1469         hdr->nops++;
1470         hdr->replen += decode_readlink_maxsz;
1471 }
1472
1473 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1474 {
1475         __be32 *p;
1476
1477         p = reserve_space(xdr, 8 + name->len);
1478         *p++ = cpu_to_be32(OP_REMOVE);
1479         xdr_encode_opaque(p, name->name, name->len);
1480         hdr->nops++;
1481         hdr->replen += decode_remove_maxsz;
1482 }
1483
1484 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1485 {
1486         __be32 *p;
1487
1488         p = reserve_space(xdr, 4);
1489         *p = cpu_to_be32(OP_RENAME);
1490         encode_string(xdr, oldname->len, oldname->name);
1491         encode_string(xdr, newname->len, newname->name);
1492         hdr->nops++;
1493         hdr->replen += decode_rename_maxsz;
1494 }
1495
1496 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1497 {
1498         __be32 *p;
1499
1500         p = reserve_space(xdr, 12);
1501         *p++ = cpu_to_be32(OP_RENEW);
1502         xdr_encode_hyper(p, client_stateid->cl_clientid);
1503         hdr->nops++;
1504         hdr->replen += decode_renew_maxsz;
1505 }
1506
1507 static void
1508 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1509 {
1510         __be32 *p;
1511
1512         p = reserve_space(xdr, 4);
1513         *p = cpu_to_be32(OP_RESTOREFH);
1514         hdr->nops++;
1515         hdr->replen += decode_restorefh_maxsz;
1516 }
1517
1518 static void
1519 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1520 {
1521         __be32 *p;
1522
1523         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1524         *p++ = cpu_to_be32(OP_SETATTR);
1525         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1526         p = reserve_space(xdr, 2*4);
1527         *p++ = cpu_to_be32(1);
1528         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1529         BUG_ON(arg->acl_len % 4);
1530         p = reserve_space(xdr, 4);
1531         *p = cpu_to_be32(arg->acl_len);
1532         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1533         hdr->nops++;
1534         hdr->replen += decode_setacl_maxsz;
1535 }
1536
1537 static void
1538 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1539 {
1540         __be32 *p;
1541
1542         p = reserve_space(xdr, 4);
1543         *p = cpu_to_be32(OP_SAVEFH);
1544         hdr->nops++;
1545         hdr->replen += decode_savefh_maxsz;
1546 }
1547
1548 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1549 {
1550         __be32 *p;
1551
1552         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1553         *p++ = cpu_to_be32(OP_SETATTR);
1554         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1555         hdr->nops++;
1556         hdr->replen += decode_setattr_maxsz;
1557         encode_attrs(xdr, arg->iap, server);
1558 }
1559
1560 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1561 {
1562         __be32 *p;
1563
1564         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1565         *p++ = cpu_to_be32(OP_SETCLIENTID);
1566         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1567
1568         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1569         p = reserve_space(xdr, 4);
1570         *p = cpu_to_be32(setclientid->sc_prog);
1571         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1572         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1573         p = reserve_space(xdr, 4);
1574         *p = cpu_to_be32(setclientid->sc_cb_ident);
1575         hdr->nops++;
1576         hdr->replen += decode_setclientid_maxsz;
1577 }
1578
1579 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1580 {
1581         __be32 *p;
1582
1583         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1584         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1585         p = xdr_encode_hyper(p, arg->clientid);
1586         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1587         hdr->nops++;
1588         hdr->replen += decode_setclientid_confirm_maxsz;
1589 }
1590
1591 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1592 {
1593         __be32 *p;
1594
1595         p = reserve_space(xdr, 4);
1596         *p = cpu_to_be32(OP_WRITE);
1597
1598         encode_stateid(xdr, args->context, args->lock_context,
1599                        hdr->minorversion);
1600
1601         p = reserve_space(xdr, 16);
1602         p = xdr_encode_hyper(p, args->offset);
1603         *p++ = cpu_to_be32(args->stable);
1604         *p = cpu_to_be32(args->count);
1605
1606         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1607         hdr->nops++;
1608         hdr->replen += decode_write_maxsz;
1609 }
1610
1611 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1612 {
1613         __be32 *p;
1614
1615         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1616
1617         *p++ = cpu_to_be32(OP_DELEGRETURN);
1618         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1619         hdr->nops++;
1620         hdr->replen += decode_delegreturn_maxsz;
1621 }
1622
1623 #if defined(CONFIG_NFS_V4_1)
1624 /* NFSv4.1 operations */
1625 static void encode_exchange_id(struct xdr_stream *xdr,
1626                                struct nfs41_exchange_id_args *args,
1627                                struct compound_hdr *hdr)
1628 {
1629         __be32 *p;
1630
1631         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1632         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1633         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1634
1635         encode_string(xdr, args->id_len, args->id);
1636
1637         p = reserve_space(xdr, 12);
1638         *p++ = cpu_to_be32(args->flags);
1639         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1640         *p = cpu_to_be32(0);    /* zero length implementation id array */
1641         hdr->nops++;
1642         hdr->replen += decode_exchange_id_maxsz;
1643 }
1644
1645 static void encode_create_session(struct xdr_stream *xdr,
1646                                   struct nfs41_create_session_args *args,
1647                                   struct compound_hdr *hdr)
1648 {
1649         __be32 *p;
1650         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1651         uint32_t len;
1652         struct nfs_client *clp = args->client;
1653         u32 max_resp_sz_cached;
1654
1655         /*
1656          * Assumes OPEN is the biggest non-idempotent compound.
1657          * 2 is the verifier.
1658          */
1659         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1660                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1661
1662         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1663                         clp->cl_ipaddr);
1664
1665         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1666         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1667         p = xdr_encode_hyper(p, clp->cl_clientid);
1668         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1669         *p++ = cpu_to_be32(args->flags);                        /*flags */
1670
1671         /* Fore Channel */
1672         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1673         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1674         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1675         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1676         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1677         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1678         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1679
1680         /* Back Channel */
1681         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1682         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1683         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1684         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1685         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1686         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1687         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1688
1689         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1690         *p++ = cpu_to_be32(1);
1691         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1692
1693         /* authsys_parms rfc1831 */
1694         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1695         p = xdr_encode_opaque(p, machine_name, len);
1696         *p++ = cpu_to_be32(0);                          /* UID */
1697         *p++ = cpu_to_be32(0);                          /* GID */
1698         *p = cpu_to_be32(0);                            /* No more gids */
1699         hdr->nops++;
1700         hdr->replen += decode_create_session_maxsz;
1701 }
1702
1703 static void encode_destroy_session(struct xdr_stream *xdr,
1704                                    struct nfs4_session *session,
1705                                    struct compound_hdr *hdr)
1706 {
1707         __be32 *p;
1708         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1709         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1710         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1711         hdr->nops++;
1712         hdr->replen += decode_destroy_session_maxsz;
1713 }
1714
1715 static void encode_reclaim_complete(struct xdr_stream *xdr,
1716                                     struct nfs41_reclaim_complete_args *args,
1717                                     struct compound_hdr *hdr)
1718 {
1719         __be32 *p;
1720
1721         p = reserve_space(xdr, 8);
1722         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1723         *p++ = cpu_to_be32(args->one_fs);
1724         hdr->nops++;
1725         hdr->replen += decode_reclaim_complete_maxsz;
1726 }
1727 #endif /* CONFIG_NFS_V4_1 */
1728
1729 static void encode_sequence(struct xdr_stream *xdr,
1730                             const struct nfs4_sequence_args *args,
1731                             struct compound_hdr *hdr)
1732 {
1733 #if defined(CONFIG_NFS_V4_1)
1734         struct nfs4_session *session = args->sa_session;
1735         struct nfs4_slot_table *tp;
1736         struct nfs4_slot *slot;
1737         __be32 *p;
1738
1739         if (!session)
1740                 return;
1741
1742         tp = &session->fc_slot_table;
1743
1744         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1745         slot = tp->slots + args->sa_slotid;
1746
1747         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1748         *p++ = cpu_to_be32(OP_SEQUENCE);
1749
1750         /*
1751          * Sessionid + seqid + slotid + max slotid + cache_this
1752          */
1753         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1754                 "max_slotid=%d cache_this=%d\n",
1755                 __func__,
1756                 ((u32 *)session->sess_id.data)[0],
1757                 ((u32 *)session->sess_id.data)[1],
1758                 ((u32 *)session->sess_id.data)[2],
1759                 ((u32 *)session->sess_id.data)[3],
1760                 slot->seq_nr, args->sa_slotid,
1761                 tp->highest_used_slotid, args->sa_cache_this);
1762         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1763         *p++ = cpu_to_be32(slot->seq_nr);
1764         *p++ = cpu_to_be32(args->sa_slotid);
1765         *p++ = cpu_to_be32(tp->highest_used_slotid);
1766         *p = cpu_to_be32(args->sa_cache_this);
1767         hdr->nops++;
1768         hdr->replen += decode_sequence_maxsz;
1769 #endif /* CONFIG_NFS_V4_1 */
1770 }
1771
1772 #ifdef CONFIG_NFS_V4_1
1773 static void
1774 encode_getdeviceinfo(struct xdr_stream *xdr,
1775                      const struct nfs4_getdeviceinfo_args *args,
1776                      struct compound_hdr *hdr)
1777 {
1778         __be32 *p;
1779
1780         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1781         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1782         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1783                                     NFS4_DEVICEID4_SIZE);
1784         *p++ = cpu_to_be32(args->pdev->layout_type);
1785         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1786         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1787         hdr->nops++;
1788         hdr->replen += decode_getdeviceinfo_maxsz;
1789 }
1790
1791 static void
1792 encode_layoutget(struct xdr_stream *xdr,
1793                       const struct nfs4_layoutget_args *args,
1794                       struct compound_hdr *hdr)
1795 {
1796         __be32 *p;
1797
1798         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1799         *p++ = cpu_to_be32(OP_LAYOUTGET);
1800         *p++ = cpu_to_be32(0);     /* Signal layout available */
1801         *p++ = cpu_to_be32(args->type);
1802         *p++ = cpu_to_be32(args->range.iomode);
1803         p = xdr_encode_hyper(p, args->range.offset);
1804         p = xdr_encode_hyper(p, args->range.length);
1805         p = xdr_encode_hyper(p, args->minlength);
1806         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1807         *p = cpu_to_be32(args->maxcount);
1808
1809         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1810                 __func__,
1811                 args->type,
1812                 args->range.iomode,
1813                 (unsigned long)args->range.offset,
1814                 (unsigned long)args->range.length,
1815                 args->maxcount);
1816         hdr->nops++;
1817         hdr->replen += decode_layoutget_maxsz;
1818 }
1819 #endif /* CONFIG_NFS_V4_1 */
1820
1821 /*
1822  * END OF "GENERIC" ENCODE ROUTINES.
1823  */
1824
1825 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1826 {
1827 #if defined(CONFIG_NFS_V4_1)
1828         if (args->sa_session)
1829                 return args->sa_session->clp->cl_mvops->minor_version;
1830 #endif /* CONFIG_NFS_V4_1 */
1831         return 0;
1832 }
1833
1834 /*
1835  * Encode an ACCESS request
1836  */
1837 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1838                                 const struct nfs4_accessargs *args)
1839 {
1840         struct compound_hdr hdr = {
1841                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1842         };
1843
1844         encode_compound_hdr(xdr, req, &hdr);
1845         encode_sequence(xdr, &args->seq_args, &hdr);
1846         encode_putfh(xdr, args->fh, &hdr);
1847         encode_access(xdr, args->access, &hdr);
1848         encode_getfattr(xdr, args->bitmask, &hdr);
1849         encode_nops(&hdr);
1850 }
1851
1852 /*
1853  * Encode LOOKUP request
1854  */
1855 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1856                                 const struct nfs4_lookup_arg *args)
1857 {
1858         struct compound_hdr hdr = {
1859                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1860         };
1861
1862         encode_compound_hdr(xdr, req, &hdr);
1863         encode_sequence(xdr, &args->seq_args, &hdr);
1864         encode_putfh(xdr, args->dir_fh, &hdr);
1865         encode_lookup(xdr, args->name, &hdr);
1866         encode_getfh(xdr, &hdr);
1867         encode_getfattr(xdr, args->bitmask, &hdr);
1868         encode_nops(&hdr);
1869 }
1870
1871 /*
1872  * Encode LOOKUP_ROOT request
1873  */
1874 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1875                                      struct xdr_stream *xdr,
1876                                      const struct nfs4_lookup_root_arg *args)
1877 {
1878         struct compound_hdr hdr = {
1879                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1880         };
1881
1882         encode_compound_hdr(xdr, req, &hdr);
1883         encode_sequence(xdr, &args->seq_args, &hdr);
1884         encode_putrootfh(xdr, &hdr);
1885         encode_getfh(xdr, &hdr);
1886         encode_getfattr(xdr, args->bitmask, &hdr);
1887         encode_nops(&hdr);
1888 }
1889
1890 /*
1891  * Encode REMOVE request
1892  */
1893 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1894                                 const struct nfs_removeargs *args)
1895 {
1896         struct compound_hdr hdr = {
1897                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1898         };
1899
1900         encode_compound_hdr(xdr, req, &hdr);
1901         encode_sequence(xdr, &args->seq_args, &hdr);
1902         encode_putfh(xdr, args->fh, &hdr);
1903         encode_remove(xdr, &args->name, &hdr);
1904         encode_getfattr(xdr, args->bitmask, &hdr);
1905         encode_nops(&hdr);
1906 }
1907
1908 /*
1909  * Encode RENAME request
1910  */
1911 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1912                                 const struct nfs_renameargs *args)
1913 {
1914         struct compound_hdr hdr = {
1915                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1916         };
1917
1918         encode_compound_hdr(xdr, req, &hdr);
1919         encode_sequence(xdr, &args->seq_args, &hdr);
1920         encode_putfh(xdr, args->old_dir, &hdr);
1921         encode_savefh(xdr, &hdr);
1922         encode_putfh(xdr, args->new_dir, &hdr);
1923         encode_rename(xdr, args->old_name, args->new_name, &hdr);
1924         encode_getfattr(xdr, args->bitmask, &hdr);
1925         encode_restorefh(xdr, &hdr);
1926         encode_getfattr(xdr, args->bitmask, &hdr);
1927         encode_nops(&hdr);
1928 }
1929
1930 /*
1931  * Encode LINK request
1932  */
1933 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
1934                              const struct nfs4_link_arg *args)
1935 {
1936         struct compound_hdr hdr = {
1937                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1938         };
1939
1940         encode_compound_hdr(xdr, req, &hdr);
1941         encode_sequence(xdr, &args->seq_args, &hdr);
1942         encode_putfh(xdr, args->fh, &hdr);
1943         encode_savefh(xdr, &hdr);
1944         encode_putfh(xdr, args->dir_fh, &hdr);
1945         encode_link(xdr, args->name, &hdr);
1946         encode_getfattr(xdr, args->bitmask, &hdr);
1947         encode_restorefh(xdr, &hdr);
1948         encode_getfattr(xdr, args->bitmask, &hdr);
1949         encode_nops(&hdr);
1950 }
1951
1952 /*
1953  * Encode CREATE request
1954  */
1955 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
1956                                 const struct nfs4_create_arg *args)
1957 {
1958         struct compound_hdr hdr = {
1959                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1960         };
1961
1962         encode_compound_hdr(xdr, req, &hdr);
1963         encode_sequence(xdr, &args->seq_args, &hdr);
1964         encode_putfh(xdr, args->dir_fh, &hdr);
1965         encode_savefh(xdr, &hdr);
1966         encode_create(xdr, args, &hdr);
1967         encode_getfh(xdr, &hdr);
1968         encode_getfattr(xdr, args->bitmask, &hdr);
1969         encode_restorefh(xdr, &hdr);
1970         encode_getfattr(xdr, args->bitmask, &hdr);
1971         encode_nops(&hdr);
1972 }
1973
1974 /*
1975  * Encode SYMLINK request
1976  */
1977 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
1978                                  const struct nfs4_create_arg *args)
1979 {
1980         nfs4_xdr_enc_create(req, xdr, args);
1981 }
1982
1983 /*
1984  * Encode GETATTR request
1985  */
1986 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
1987                                  const struct nfs4_getattr_arg *args)
1988 {
1989         struct compound_hdr hdr = {
1990                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1991         };
1992
1993         encode_compound_hdr(xdr, req, &hdr);
1994         encode_sequence(xdr, &args->seq_args, &hdr);
1995         encode_putfh(xdr, args->fh, &hdr);
1996         encode_getfattr(xdr, args->bitmask, &hdr);
1997         encode_nops(&hdr);
1998 }
1999
2000 /*
2001  * Encode a CLOSE request
2002  */
2003 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2004                                struct nfs_closeargs *args)
2005 {
2006         struct compound_hdr hdr = {
2007                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2008         };
2009
2010         encode_compound_hdr(xdr, req, &hdr);
2011         encode_sequence(xdr, &args->seq_args, &hdr);
2012         encode_putfh(xdr, args->fh, &hdr);
2013         encode_close(xdr, args, &hdr);
2014         encode_getfattr(xdr, args->bitmask, &hdr);
2015         encode_nops(&hdr);
2016 }
2017
2018 /*
2019  * Encode an OPEN request
2020  */
2021 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2022                               struct nfs_openargs *args)
2023 {
2024         struct compound_hdr hdr = {
2025                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2026         };
2027
2028         encode_compound_hdr(xdr, req, &hdr);
2029         encode_sequence(xdr, &args->seq_args, &hdr);
2030         encode_putfh(xdr, args->fh, &hdr);
2031         encode_savefh(xdr, &hdr);
2032         encode_open(xdr, args, &hdr);
2033         encode_getfh(xdr, &hdr);
2034         encode_getfattr(xdr, args->bitmask, &hdr);
2035         encode_restorefh(xdr, &hdr);
2036         encode_getfattr(xdr, args->bitmask, &hdr);
2037         encode_nops(&hdr);
2038 }
2039
2040 /*
2041  * Encode an OPEN_CONFIRM request
2042  */
2043 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2044                                       struct xdr_stream *xdr,
2045                                       struct nfs_open_confirmargs *args)
2046 {
2047         struct compound_hdr hdr = {
2048                 .nops   = 0,
2049         };
2050
2051         encode_compound_hdr(xdr, req, &hdr);
2052         encode_putfh(xdr, args->fh, &hdr);
2053         encode_open_confirm(xdr, args, &hdr);
2054         encode_nops(&hdr);
2055 }
2056
2057 /*
2058  * Encode an OPEN request with no attributes.
2059  */
2060 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2061                                      struct xdr_stream *xdr,
2062                                      struct nfs_openargs *args)
2063 {
2064         struct compound_hdr hdr = {
2065                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2066         };
2067
2068         encode_compound_hdr(xdr, req, &hdr);
2069         encode_sequence(xdr, &args->seq_args, &hdr);
2070         encode_putfh(xdr, args->fh, &hdr);
2071         encode_open(xdr, args, &hdr);
2072         encode_getfattr(xdr, args->bitmask, &hdr);
2073         encode_nops(&hdr);
2074 }
2075
2076 /*
2077  * Encode an OPEN_DOWNGRADE request
2078  */
2079 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2080                                         struct xdr_stream *xdr,
2081                                         struct nfs_closeargs *args)
2082 {
2083         struct compound_hdr hdr = {
2084                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2085         };
2086
2087         encode_compound_hdr(xdr, req, &hdr);
2088         encode_sequence(xdr, &args->seq_args, &hdr);
2089         encode_putfh(xdr, args->fh, &hdr);
2090         encode_open_downgrade(xdr, args, &hdr);
2091         encode_getfattr(xdr, args->bitmask, &hdr);
2092         encode_nops(&hdr);
2093 }
2094
2095 /*
2096  * Encode a LOCK request
2097  */
2098 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2099                               struct nfs_lock_args *args)
2100 {
2101         struct compound_hdr hdr = {
2102                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2103         };
2104
2105         encode_compound_hdr(xdr, req, &hdr);
2106         encode_sequence(xdr, &args->seq_args, &hdr);
2107         encode_putfh(xdr, args->fh, &hdr);
2108         encode_lock(xdr, args, &hdr);
2109         encode_nops(&hdr);
2110 }
2111
2112 /*
2113  * Encode a LOCKT request
2114  */
2115 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2116                                struct nfs_lockt_args *args)
2117 {
2118         struct compound_hdr hdr = {
2119                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2120         };
2121
2122         encode_compound_hdr(xdr, req, &hdr);
2123         encode_sequence(xdr, &args->seq_args, &hdr);
2124         encode_putfh(xdr, args->fh, &hdr);
2125         encode_lockt(xdr, args, &hdr);
2126         encode_nops(&hdr);
2127 }
2128
2129 /*
2130  * Encode a LOCKU request
2131  */
2132 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2133                                struct nfs_locku_args *args)
2134 {
2135         struct compound_hdr hdr = {
2136                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2137         };
2138
2139         encode_compound_hdr(xdr, req, &hdr);
2140         encode_sequence(xdr, &args->seq_args, &hdr);
2141         encode_putfh(xdr, args->fh, &hdr);
2142         encode_locku(xdr, args, &hdr);
2143         encode_nops(&hdr);
2144 }
2145
2146 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2147                                            struct xdr_stream *xdr,
2148                                         struct nfs_release_lockowner_args *args)
2149 {
2150         struct compound_hdr hdr = {
2151                 .minorversion = 0,
2152         };
2153
2154         encode_compound_hdr(xdr, req, &hdr);
2155         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2156         encode_nops(&hdr);
2157 }
2158
2159 /*
2160  * Encode a READLINK request
2161  */
2162 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2163                                   const struct nfs4_readlink *args)
2164 {
2165         struct compound_hdr hdr = {
2166                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2167         };
2168
2169         encode_compound_hdr(xdr, req, &hdr);
2170         encode_sequence(xdr, &args->seq_args, &hdr);
2171         encode_putfh(xdr, args->fh, &hdr);
2172         encode_readlink(xdr, args, req, &hdr);
2173
2174         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2175                         args->pgbase, args->pglen);
2176         encode_nops(&hdr);
2177 }
2178
2179 /*
2180  * Encode a READDIR request
2181  */
2182 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2183                                  const struct nfs4_readdir_arg *args)
2184 {
2185         struct compound_hdr hdr = {
2186                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2187         };
2188
2189         encode_compound_hdr(xdr, req, &hdr);
2190         encode_sequence(xdr, &args->seq_args, &hdr);
2191         encode_putfh(xdr, args->fh, &hdr);
2192         encode_readdir(xdr, args, req, &hdr);
2193
2194         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2195                          args->pgbase, args->count);
2196         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2197                         __func__, hdr.replen << 2, args->pages,
2198                         args->pgbase, args->count);
2199         encode_nops(&hdr);
2200 }
2201
2202 /*
2203  * Encode a READ request
2204  */
2205 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2206                               struct nfs_readargs *args)
2207 {
2208         struct compound_hdr hdr = {
2209                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2210         };
2211
2212         encode_compound_hdr(xdr, req, &hdr);
2213         encode_sequence(xdr, &args->seq_args, &hdr);
2214         encode_putfh(xdr, args->fh, &hdr);
2215         encode_read(xdr, args, &hdr);
2216
2217         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2218                          args->pages, args->pgbase, args->count);
2219         req->rq_rcv_buf.flags |= XDRBUF_READ;
2220         encode_nops(&hdr);
2221 }
2222
2223 /*
2224  * Encode an SETATTR request
2225  */
2226 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2227                                  struct nfs_setattrargs *args)
2228 {
2229         struct compound_hdr hdr = {
2230                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2231         };
2232
2233         encode_compound_hdr(xdr, req, &hdr);
2234         encode_sequence(xdr, &args->seq_args, &hdr);
2235         encode_putfh(xdr, args->fh, &hdr);
2236         encode_setattr(xdr, args, args->server, &hdr);
2237         encode_getfattr(xdr, args->bitmask, &hdr);
2238         encode_nops(&hdr);
2239 }
2240
2241 /*
2242  * Encode a GETACL request
2243  */
2244 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2245                                 struct nfs_getaclargs *args)
2246 {
2247         struct compound_hdr hdr = {
2248                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2249         };
2250         uint32_t replen;
2251
2252         encode_compound_hdr(xdr, req, &hdr);
2253         encode_sequence(xdr, &args->seq_args, &hdr);
2254         encode_putfh(xdr, args->fh, &hdr);
2255         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2256         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2257
2258         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2259                 args->acl_pages, args->acl_pgbase, args->acl_len);
2260         encode_nops(&hdr);
2261 }
2262
2263 /*
2264  * Encode a WRITE request
2265  */
2266 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2267                                struct nfs_writeargs *args)
2268 {
2269         struct compound_hdr hdr = {
2270                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2271         };
2272
2273         encode_compound_hdr(xdr, req, &hdr);
2274         encode_sequence(xdr, &args->seq_args, &hdr);
2275         encode_putfh(xdr, args->fh, &hdr);
2276         encode_write(xdr, args, &hdr);
2277         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2278         if (args->bitmask)
2279                 encode_getfattr(xdr, args->bitmask, &hdr);
2280         encode_nops(&hdr);
2281 }
2282
2283 /*
2284  *  a COMMIT request
2285  */
2286 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2287                                 struct nfs_writeargs *args)
2288 {
2289         struct compound_hdr hdr = {
2290                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2291         };
2292
2293         encode_compound_hdr(xdr, req, &hdr);
2294         encode_sequence(xdr, &args->seq_args, &hdr);
2295         encode_putfh(xdr, args->fh, &hdr);
2296         encode_commit(xdr, args, &hdr);
2297         encode_getfattr(xdr, args->bitmask, &hdr);
2298         encode_nops(&hdr);
2299 }
2300
2301 /*
2302  * FSINFO request
2303  */
2304 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2305                                 struct nfs4_fsinfo_arg *args)
2306 {
2307         struct compound_hdr hdr = {
2308                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2309         };
2310
2311         encode_compound_hdr(xdr, req, &hdr);
2312         encode_sequence(xdr, &args->seq_args, &hdr);
2313         encode_putfh(xdr, args->fh, &hdr);
2314         encode_fsinfo(xdr, args->bitmask, &hdr);
2315         encode_nops(&hdr);
2316 }
2317
2318 /*
2319  * a PATHCONF request
2320  */
2321 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2322                                   const struct nfs4_pathconf_arg *args)
2323 {
2324         struct compound_hdr hdr = {
2325                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2326         };
2327
2328         encode_compound_hdr(xdr, req, &hdr);
2329         encode_sequence(xdr, &args->seq_args, &hdr);
2330         encode_putfh(xdr, args->fh, &hdr);
2331         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2332                            &hdr);
2333         encode_nops(&hdr);
2334 }
2335
2336 /*
2337  * a STATFS request
2338  */
2339 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2340                                 const struct nfs4_statfs_arg *args)
2341 {
2342         struct compound_hdr hdr = {
2343                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2344         };
2345
2346         encode_compound_hdr(xdr, req, &hdr);
2347         encode_sequence(xdr, &args->seq_args, &hdr);
2348         encode_putfh(xdr, args->fh, &hdr);
2349         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2350                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2351         encode_nops(&hdr);
2352 }
2353
2354 /*
2355  * GETATTR_BITMAP request
2356  */
2357 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2358                                      struct xdr_stream *xdr,
2359                                      struct nfs4_server_caps_arg *args)
2360 {
2361         struct compound_hdr hdr = {
2362                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2363         };
2364
2365         encode_compound_hdr(xdr, req, &hdr);
2366         encode_sequence(xdr, &args->seq_args, &hdr);
2367         encode_putfh(xdr, args->fhandle, &hdr);
2368         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2369                            FATTR4_WORD0_LINK_SUPPORT|
2370                            FATTR4_WORD0_SYMLINK_SUPPORT|
2371                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2372         encode_nops(&hdr);
2373 }
2374
2375 /*
2376  * a RENEW request
2377  */
2378 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2379                                struct nfs_client *clp)
2380 {
2381         struct compound_hdr hdr = {
2382                 .nops   = 0,
2383         };
2384
2385         encode_compound_hdr(xdr, req, &hdr);
2386         encode_renew(xdr, clp, &hdr);
2387         encode_nops(&hdr);
2388 }
2389
2390 /*
2391  * a SETCLIENTID request
2392  */
2393 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2394                                      struct xdr_stream *xdr,
2395                                      struct nfs4_setclientid *sc)
2396 {
2397         struct compound_hdr hdr = {
2398                 .nops   = 0,
2399         };
2400
2401         encode_compound_hdr(xdr, req, &hdr);
2402         encode_setclientid(xdr, sc, &hdr);
2403         encode_nops(&hdr);
2404 }
2405
2406 /*
2407  * a SETCLIENTID_CONFIRM request
2408  */
2409 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2410                                              struct xdr_stream *xdr,
2411                                              struct nfs4_setclientid_res *arg)
2412 {
2413         struct compound_hdr hdr = {
2414                 .nops   = 0,
2415         };
2416         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2417
2418         encode_compound_hdr(xdr, req, &hdr);
2419         encode_setclientid_confirm(xdr, arg, &hdr);
2420         encode_putrootfh(xdr, &hdr);
2421         encode_fsinfo(xdr, lease_bitmap, &hdr);
2422         encode_nops(&hdr);
2423 }
2424
2425 /*
2426  * DELEGRETURN request
2427  */
2428 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2429                                      struct xdr_stream *xdr,
2430                                      const struct nfs4_delegreturnargs *args)
2431 {
2432         struct compound_hdr hdr = {
2433                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2434         };
2435
2436         encode_compound_hdr(xdr, req, &hdr);
2437         encode_sequence(xdr, &args->seq_args, &hdr);
2438         encode_putfh(xdr, args->fhandle, &hdr);
2439         encode_delegreturn(xdr, args->stateid, &hdr);
2440         encode_getfattr(xdr, args->bitmask, &hdr);
2441         encode_nops(&hdr);
2442 }
2443
2444 /*
2445  * Encode FS_LOCATIONS request
2446  */
2447 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2448                                       struct xdr_stream *xdr,
2449                                       struct nfs4_fs_locations_arg *args)
2450 {
2451         struct compound_hdr hdr = {
2452                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2453         };
2454         uint32_t replen;
2455
2456         encode_compound_hdr(xdr, req, &hdr);
2457         encode_sequence(xdr, &args->seq_args, &hdr);
2458         encode_putfh(xdr, args->dir_fh, &hdr);
2459         encode_lookup(xdr, args->name, &hdr);
2460         replen = hdr.replen;    /* get the attribute into args->page */
2461         encode_fs_locations(xdr, args->bitmask, &hdr);
2462
2463         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2464                         0, PAGE_SIZE);
2465         encode_nops(&hdr);
2466 }
2467
2468 #if defined(CONFIG_NFS_V4_1)
2469 /*
2470  * EXCHANGE_ID request
2471  */
2472 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2473                                      struct xdr_stream *xdr,
2474                                      struct nfs41_exchange_id_args *args)
2475 {
2476         struct compound_hdr hdr = {
2477                 .minorversion = args->client->cl_mvops->minor_version,
2478         };
2479
2480         encode_compound_hdr(xdr, req, &hdr);
2481         encode_exchange_id(xdr, args, &hdr);
2482         encode_nops(&hdr);
2483 }
2484
2485 /*
2486  * a CREATE_SESSION request
2487  */
2488 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2489                                         struct xdr_stream *xdr,
2490                                         struct nfs41_create_session_args *args)
2491 {
2492         struct compound_hdr hdr = {
2493                 .minorversion = args->client->cl_mvops->minor_version,
2494         };
2495
2496         encode_compound_hdr(xdr, req, &hdr);
2497         encode_create_session(xdr, args, &hdr);
2498         encode_nops(&hdr);
2499 }
2500
2501 /*
2502  * a DESTROY_SESSION request
2503  */
2504 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2505                                          struct xdr_stream *xdr,
2506                                          struct nfs4_session *session)
2507 {
2508         struct compound_hdr hdr = {
2509                 .minorversion = session->clp->cl_mvops->minor_version,
2510         };
2511
2512         encode_compound_hdr(xdr, req, &hdr);
2513         encode_destroy_session(xdr, session, &hdr);
2514         encode_nops(&hdr);
2515 }
2516
2517 /*
2518  * a SEQUENCE request
2519  */
2520 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2521                                   struct nfs4_sequence_args *args)
2522 {
2523         struct compound_hdr hdr = {
2524                 .minorversion = nfs4_xdr_minorversion(args),
2525         };
2526
2527         encode_compound_hdr(xdr, req, &hdr);
2528         encode_sequence(xdr, args, &hdr);
2529         encode_nops(&hdr);
2530 }
2531
2532 /*
2533  * a GET_LEASE_TIME request
2534  */
2535 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2536                                         struct xdr_stream *xdr,
2537                                         struct nfs4_get_lease_time_args *args)
2538 {
2539         struct compound_hdr hdr = {
2540                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2541         };
2542         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2543
2544         encode_compound_hdr(xdr, req, &hdr);
2545         encode_sequence(xdr, &args->la_seq_args, &hdr);
2546         encode_putrootfh(xdr, &hdr);
2547         encode_fsinfo(xdr, lease_bitmap, &hdr);
2548         encode_nops(&hdr);
2549 }
2550
2551 /*
2552  * a RECLAIM_COMPLETE request
2553  */
2554 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2555                                           struct xdr_stream *xdr,
2556                                 struct nfs41_reclaim_complete_args *args)
2557 {
2558         struct compound_hdr hdr = {
2559                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2560         };
2561
2562         encode_compound_hdr(xdr, req, &hdr);
2563         encode_sequence(xdr, &args->seq_args, &hdr);
2564         encode_reclaim_complete(xdr, args, &hdr);
2565         encode_nops(&hdr);
2566 }
2567
2568 /*
2569  * Encode GETDEVICEINFO request
2570  */
2571 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2572                                        struct xdr_stream *xdr,
2573                                        struct nfs4_getdeviceinfo_args *args)
2574 {
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_sequence(xdr, &args->seq_args, &hdr);
2581         encode_getdeviceinfo(xdr, args, &hdr);
2582
2583         /* set up reply kvec. Subtract notification bitmap max size (2)
2584          * so that notification bitmap is put in xdr_buf tail */
2585         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2586                          args->pdev->pages, args->pdev->pgbase,
2587                          args->pdev->pglen);
2588
2589         encode_nops(&hdr);
2590 }
2591
2592 /*
2593  *  Encode LAYOUTGET request
2594  */
2595 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2596                                    struct xdr_stream *xdr,
2597                                    struct nfs4_layoutget_args *args)
2598 {
2599         struct compound_hdr hdr = {
2600                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2601         };
2602
2603         encode_compound_hdr(xdr, req, &hdr);
2604         encode_sequence(xdr, &args->seq_args, &hdr);
2605         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2606         encode_layoutget(xdr, args, &hdr);
2607         encode_nops(&hdr);
2608 }
2609 #endif /* CONFIG_NFS_V4_1 */
2610
2611 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2612 {
2613         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2614                 "Remaining buffer length is %tu words.\n",
2615                 func, xdr->end - xdr->p);
2616 }
2617
2618 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2619 {
2620         __be32 *p;
2621
2622         p = xdr_inline_decode(xdr, 4);
2623         if (unlikely(!p))
2624                 goto out_overflow;
2625         *len = be32_to_cpup(p);
2626         p = xdr_inline_decode(xdr, *len);
2627         if (unlikely(!p))
2628                 goto out_overflow;
2629         *string = (char *)p;
2630         return 0;
2631 out_overflow:
2632         print_overflow_msg(__func__, xdr);
2633         return -EIO;
2634 }
2635
2636 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2637 {
2638         __be32 *p;
2639
2640         p = xdr_inline_decode(xdr, 8);
2641         if (unlikely(!p))
2642                 goto out_overflow;
2643         hdr->status = be32_to_cpup(p++);
2644         hdr->taglen = be32_to_cpup(p);
2645
2646         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2647         if (unlikely(!p))
2648                 goto out_overflow;
2649         hdr->tag = (char *)p;
2650         p += XDR_QUADLEN(hdr->taglen);
2651         hdr->nops = be32_to_cpup(p);
2652         if (unlikely(hdr->nops < 1))
2653                 return nfs4_stat_to_errno(hdr->status);
2654         return 0;
2655 out_overflow:
2656         print_overflow_msg(__func__, xdr);
2657         return -EIO;
2658 }
2659
2660 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2661 {
2662         __be32 *p;
2663         uint32_t opnum;
2664         int32_t nfserr;
2665
2666         p = xdr_inline_decode(xdr, 8);
2667         if (unlikely(!p))
2668                 goto out_overflow;
2669         opnum = be32_to_cpup(p++);
2670         if (opnum != expected) {
2671                 dprintk("nfs: Server returned operation"
2672                         " %d but we issued a request for %d\n",
2673                                 opnum, expected);
2674                 return -EIO;
2675         }
2676         nfserr = be32_to_cpup(p);
2677         if (nfserr != NFS_OK)
2678                 return nfs4_stat_to_errno(nfserr);
2679         return 0;
2680 out_overflow:
2681         print_overflow_msg(__func__, xdr);
2682         return -EIO;
2683 }
2684
2685 /* Dummy routine */
2686 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2687 {
2688         __be32 *p;
2689         unsigned int strlen;
2690         char *str;
2691
2692         p = xdr_inline_decode(xdr, 12);
2693         if (likely(p))
2694                 return decode_opaque_inline(xdr, &strlen, &str);
2695         print_overflow_msg(__func__, xdr);
2696         return -EIO;
2697 }
2698
2699 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2700 {
2701         uint32_t bmlen;
2702         __be32 *p;
2703
2704         p = xdr_inline_decode(xdr, 4);
2705         if (unlikely(!p))
2706                 goto out_overflow;
2707         bmlen = be32_to_cpup(p);
2708
2709         bitmap[0] = bitmap[1] = 0;
2710         p = xdr_inline_decode(xdr, (bmlen << 2));
2711         if (unlikely(!p))
2712                 goto out_overflow;
2713         if (bmlen > 0) {
2714                 bitmap[0] = be32_to_cpup(p++);
2715                 if (bmlen > 1)
2716                         bitmap[1] = be32_to_cpup(p);
2717         }
2718         return 0;
2719 out_overflow:
2720         print_overflow_msg(__func__, xdr);
2721         return -EIO;
2722 }
2723
2724 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2725 {
2726         __be32 *p;
2727
2728         p = xdr_inline_decode(xdr, 4);
2729         if (unlikely(!p))
2730                 goto out_overflow;
2731         *attrlen = be32_to_cpup(p);
2732         *savep = xdr->p;
2733         return 0;
2734 out_overflow:
2735         print_overflow_msg(__func__, xdr);
2736         return -EIO;
2737 }
2738
2739 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2740 {
2741         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2742                 int ret;
2743                 ret = decode_attr_bitmap(xdr, bitmask);
2744                 if (unlikely(ret < 0))
2745                         return ret;
2746                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2747         } else
2748                 bitmask[0] = bitmask[1] = 0;
2749         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2750         return 0;
2751 }
2752
2753 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2754 {
2755         __be32 *p;
2756         int ret = 0;
2757
2758         *type = 0;
2759         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2760                 return -EIO;
2761         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2762                 p = xdr_inline_decode(xdr, 4);
2763                 if (unlikely(!p))
2764                         goto out_overflow;
2765                 *type = be32_to_cpup(p);
2766                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2767                         dprintk("%s: bad type %d\n", __func__, *type);
2768                         return -EIO;
2769                 }
2770                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2771                 ret = NFS_ATTR_FATTR_TYPE;
2772         }
2773         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2774         return ret;
2775 out_overflow:
2776         print_overflow_msg(__func__, xdr);
2777         return -EIO;
2778 }
2779
2780 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2781 {
2782         __be32 *p;
2783         int ret = 0;
2784
2785         *change = 0;
2786         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2787                 return -EIO;
2788         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2789                 p = xdr_inline_decode(xdr, 8);
2790                 if (unlikely(!p))
2791                         goto out_overflow;
2792                 xdr_decode_hyper(p, change);
2793                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2794                 ret = NFS_ATTR_FATTR_CHANGE;
2795         }
2796         dprintk("%s: change attribute=%Lu\n", __func__,
2797                         (unsigned long long)*change);
2798         return ret;
2799 out_overflow:
2800         print_overflow_msg(__func__, xdr);
2801         return -EIO;
2802 }
2803
2804 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2805 {
2806         __be32 *p;
2807         int ret = 0;
2808
2809         *size = 0;
2810         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2811                 return -EIO;
2812         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2813                 p = xdr_inline_decode(xdr, 8);
2814                 if (unlikely(!p))
2815                         goto out_overflow;
2816                 xdr_decode_hyper(p, size);
2817                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2818                 ret = NFS_ATTR_FATTR_SIZE;
2819         }
2820         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2821         return ret;
2822 out_overflow:
2823         print_overflow_msg(__func__, xdr);
2824         return -EIO;
2825 }
2826
2827 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2828 {
2829         __be32 *p;
2830
2831         *res = 0;
2832         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2833                 return -EIO;
2834         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2835                 p = xdr_inline_decode(xdr, 4);
2836                 if (unlikely(!p))
2837                         goto out_overflow;
2838                 *res = be32_to_cpup(p);
2839                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2840         }
2841         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2842         return 0;
2843 out_overflow:
2844         print_overflow_msg(__func__, xdr);
2845         return -EIO;
2846 }
2847
2848 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2849 {
2850         __be32 *p;
2851
2852         *res = 0;
2853         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2854                 return -EIO;
2855         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2856                 p = xdr_inline_decode(xdr, 4);
2857                 if (unlikely(!p))
2858                         goto out_overflow;
2859                 *res = be32_to_cpup(p);
2860                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2861         }
2862         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2863         return 0;
2864 out_overflow:
2865         print_overflow_msg(__func__, xdr);
2866         return -EIO;
2867 }
2868
2869 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2870 {
2871         __be32 *p;
2872         int ret = 0;
2873
2874         fsid->major = 0;
2875         fsid->minor = 0;
2876         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2877                 return -EIO;
2878         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2879                 p = xdr_inline_decode(xdr, 16);
2880                 if (unlikely(!p))
2881                         goto out_overflow;
2882                 p = xdr_decode_hyper(p, &fsid->major);
2883                 xdr_decode_hyper(p, &fsid->minor);
2884                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2885                 ret = NFS_ATTR_FATTR_FSID;
2886         }
2887         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2888                         (unsigned long long)fsid->major,
2889                         (unsigned long long)fsid->minor);
2890         return ret;
2891 out_overflow:
2892         print_overflow_msg(__func__, xdr);
2893         return -EIO;
2894 }
2895
2896 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2897 {
2898         __be32 *p;
2899
2900         *res = 60;
2901         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2902                 return -EIO;
2903         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2904                 p = xdr_inline_decode(xdr, 4);
2905                 if (unlikely(!p))
2906                         goto out_overflow;
2907                 *res = be32_to_cpup(p);
2908                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2909         }
2910         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2911         return 0;
2912 out_overflow:
2913         print_overflow_msg(__func__, xdr);
2914         return -EIO;
2915 }
2916
2917 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2918 {
2919         __be32 *p;
2920
2921         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2922                 return -EIO;
2923         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2924                 p = xdr_inline_decode(xdr, 4);
2925                 if (unlikely(!p))
2926                         goto out_overflow;
2927                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2928         }
2929         return 0;
2930 out_overflow:
2931         print_overflow_msg(__func__, xdr);
2932         return -EIO;
2933 }
2934
2935 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2936 {
2937         __be32 *p;
2938         int len;
2939
2940         if (fh != NULL)
2941                 memset(fh, 0, sizeof(*fh));
2942
2943         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2944                 return -EIO;
2945         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2946                 p = xdr_inline_decode(xdr, 4);
2947                 if (unlikely(!p))
2948                         goto out_overflow;
2949                 len = be32_to_cpup(p);
2950                 if (len > NFS4_FHSIZE)
2951                         return -EIO;
2952                 p = xdr_inline_decode(xdr, len);
2953                 if (unlikely(!p))
2954                         goto out_overflow;
2955                 if (fh != NULL) {
2956                         memcpy(fh->data, p, len);
2957                         fh->size = len;
2958                 }
2959                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2960         }
2961         return 0;
2962 out_overflow:
2963         print_overflow_msg(__func__, xdr);
2964         return -EIO;
2965 }
2966
2967 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2968 {
2969         __be32 *p;
2970
2971         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2972         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2973                 return -EIO;
2974         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2975                 p = xdr_inline_decode(xdr, 4);
2976                 if (unlikely(!p))
2977                         goto out_overflow;
2978                 *res = be32_to_cpup(p);
2979                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2980         }
2981         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2982         return 0;
2983 out_overflow:
2984         print_overflow_msg(__func__, xdr);
2985         return -EIO;
2986 }
2987
2988 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2989 {
2990         __be32 *p;
2991         int ret = 0;
2992
2993         *fileid = 0;
2994         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2995                 return -EIO;
2996         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2997                 p = xdr_inline_decode(xdr, 8);
2998                 if (unlikely(!p))
2999                         goto out_overflow;
3000                 xdr_decode_hyper(p, fileid);
3001                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3002                 ret = NFS_ATTR_FATTR_FILEID;
3003         }
3004         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3005         return ret;
3006 out_overflow:
3007         print_overflow_msg(__func__, xdr);
3008         return -EIO;
3009 }
3010
3011 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3012 {
3013         __be32 *p;
3014         int ret = 0;
3015
3016         *fileid = 0;
3017         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3018                 return -EIO;
3019         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3020                 p = xdr_inline_decode(xdr, 8);
3021                 if (unlikely(!p))
3022                         goto out_overflow;
3023                 xdr_decode_hyper(p, fileid);
3024                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3025                 ret = NFS_ATTR_FATTR_FILEID;
3026         }
3027         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3028         return ret;
3029 out_overflow:
3030         print_overflow_msg(__func__, xdr);
3031         return -EIO;
3032 }
3033
3034 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3035 {
3036         __be32 *p;
3037         int status = 0;
3038
3039         *res = 0;
3040         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3041                 return -EIO;
3042         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3043                 p = xdr_inline_decode(xdr, 8);
3044                 if (unlikely(!p))
3045                         goto out_overflow;
3046                 xdr_decode_hyper(p, res);
3047                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3048         }
3049         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3050         return status;
3051 out_overflow:
3052         print_overflow_msg(__func__, xdr);
3053         return -EIO;
3054 }
3055
3056 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3057 {
3058         __be32 *p;
3059         int status = 0;
3060
3061         *res = 0;
3062         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3063                 return -EIO;
3064         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3065                 p = xdr_inline_decode(xdr, 8);
3066                 if (unlikely(!p))
3067                         goto out_overflow;
3068                 xdr_decode_hyper(p, res);
3069                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3070         }
3071         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3072         return status;
3073 out_overflow:
3074         print_overflow_msg(__func__, xdr);
3075         return -EIO;
3076 }
3077
3078 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3079 {
3080         __be32 *p;
3081         int status = 0;
3082
3083         *res = 0;
3084         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3085                 return -EIO;
3086         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3087                 p = xdr_inline_decode(xdr, 8);
3088                 if (unlikely(!p))
3089                         goto out_overflow;
3090                 xdr_decode_hyper(p, res);
3091                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3092         }
3093         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3094         return status;
3095 out_overflow:
3096         print_overflow_msg(__func__, xdr);
3097         return -EIO;
3098 }
3099
3100 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3101 {
3102         u32 n;
3103         __be32 *p;
3104         int status = 0;
3105
3106         p = xdr_inline_decode(xdr, 4);
3107         if (unlikely(!p))
3108                 goto out_overflow;
3109         n = be32_to_cpup(p);
3110         if (n == 0)
3111                 goto root_path;
3112         dprintk("path ");
3113         path->ncomponents = 0;
3114         while (path->ncomponents < n) {
3115                 struct nfs4_string *component = &path->components[path->ncomponents];
3116                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3117                 if (unlikely(status != 0))
3118                         goto out_eio;
3119                 if (path->ncomponents != n)
3120                         dprintk("/");
3121                 dprintk("%s", component->data);
3122                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3123                         path->ncomponents++;
3124                 else {
3125                         dprintk("cannot parse %d components in path\n", n);
3126                         goto out_eio;
3127                 }
3128         }
3129 out:
3130         dprintk("\n");
3131         return status;
3132 root_path:
3133 /* a root pathname is sent as a zero component4 */
3134         path->ncomponents = 1;
3135         path->components[0].len=0;
3136         path->components[0].data=NULL;
3137         dprintk("path /\n");
3138         goto out;
3139 out_eio:
3140         dprintk(" status %d", status);
3141         status = -EIO;
3142         goto out;
3143 out_overflow:
3144         print_overflow_msg(__func__, xdr);
3145         return -EIO;
3146 }
3147
3148 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3149 {
3150         int n;
3151         __be32 *p;
3152         int status = -EIO;
3153
3154         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3155                 goto out;
3156         status = 0;
3157         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3158                 goto out;
3159         dprintk("%s: fsroot ", __func__);
3160         status = decode_pathname(xdr, &res->fs_path);
3161         if (unlikely(status != 0))
3162                 goto out;
3163         p = xdr_inline_decode(xdr, 4);
3164         if (unlikely(!p))
3165                 goto out_overflow;
3166         n = be32_to_cpup(p);
3167         if (n <= 0)
3168                 goto out_eio;
3169         res->nlocations = 0;
3170         while (res->nlocations < n) {
3171                 u32 m;
3172                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3173
3174                 p = xdr_inline_decode(xdr, 4);
3175                 if (unlikely(!p))
3176                         goto out_overflow;
3177                 m = be32_to_cpup(p);
3178
3179                 loc->nservers = 0;
3180                 dprintk("%s: servers ", __func__);
3181                 while (loc->nservers < m) {
3182                         struct nfs4_string *server = &loc->servers[loc->nservers];
3183                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3184                         if (unlikely(status != 0))
3185                                 goto out_eio;
3186                         dprintk("%s ", server->data);
3187                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3188                                 loc->nservers++;
3189                         else {
3190                                 unsigned int i;
3191                                 dprintk("%s: using first %u of %u servers "
3192                                         "returned for location %u\n",
3193                                                 __func__,
3194                                                 NFS4_FS_LOCATION_MAXSERVERS,
3195                                                 m, res->nlocations);
3196                                 for (i = loc->nservers; i < m; i++) {
3197                                         unsigned int len;
3198                                         char *data;
3199                                         status = decode_opaque_inline(xdr, &len, &data);
3200                                         if (unlikely(status != 0))
3201                                                 goto out_eio;
3202                                 }
3203                         }
3204                 }
3205                 status = decode_pathname(xdr, &loc->rootpath);
3206                 if (unlikely(status != 0))
3207                         goto out_eio;
3208                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3209                         res->nlocations++;
3210         }
3211         if (res->nlocations != 0)
3212                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3213 out:
3214         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3215         return status;
3216 out_overflow:
3217         print_overflow_msg(__func__, xdr);
3218 out_eio:
3219         status = -EIO;
3220         goto out;
3221 }
3222
3223 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3224 {
3225         __be32 *p;
3226         int status = 0;
3227
3228         *res = 0;
3229         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3230                 return -EIO;
3231         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3232                 p = xdr_inline_decode(xdr, 8);
3233                 if (unlikely(!p))
3234                         goto out_overflow;
3235                 xdr_decode_hyper(p, res);
3236                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3237         }
3238         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3239         return status;
3240 out_overflow:
3241         print_overflow_msg(__func__, xdr);
3242         return -EIO;
3243 }
3244
3245 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3246 {
3247         __be32 *p;
3248         int status = 0;
3249
3250         *maxlink = 1;
3251         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3252                 return -EIO;
3253         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3254                 p = xdr_inline_decode(xdr, 4);
3255                 if (unlikely(!p))
3256                         goto out_overflow;
3257                 *maxlink = be32_to_cpup(p);
3258                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3259         }
3260         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3261         return status;
3262 out_overflow:
3263         print_overflow_msg(__func__, xdr);
3264         return -EIO;
3265 }
3266
3267 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3268 {
3269         __be32 *p;
3270         int status = 0;
3271
3272         *maxname = 1024;
3273         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3274                 return -EIO;
3275         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3276                 p = xdr_inline_decode(xdr, 4);
3277                 if (unlikely(!p))
3278                         goto out_overflow;
3279                 *maxname = be32_to_cpup(p);
3280                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3281         }
3282         dprintk("%s: maxname=%u\n", __func__, *maxname);
3283         return status;
3284 out_overflow:
3285         print_overflow_msg(__func__, xdr);
3286         return -EIO;
3287 }
3288
3289 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3290 {
3291         __be32 *p;
3292         int status = 0;
3293
3294         *res = 1024;
3295         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3296                 return -EIO;
3297         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3298                 uint64_t maxread;
3299                 p = xdr_inline_decode(xdr, 8);
3300                 if (unlikely(!p))
3301                         goto out_overflow;
3302                 xdr_decode_hyper(p, &maxread);
3303                 if (maxread > 0x7FFFFFFF)
3304                         maxread = 0x7FFFFFFF;
3305                 *res = (uint32_t)maxread;
3306                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3307         }
3308         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3309         return status;
3310 out_overflow:
3311         print_overflow_msg(__func__, xdr);
3312         return -EIO;
3313 }
3314
3315 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3316 {
3317         __be32 *p;
3318         int status = 0;
3319
3320         *res = 1024;
3321         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3322                 return -EIO;
3323         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3324                 uint64_t maxwrite;
3325                 p = xdr_inline_decode(xdr, 8);
3326                 if (unlikely(!p))
3327                         goto out_overflow;
3328                 xdr_decode_hyper(p, &maxwrite);
3329                 if (maxwrite > 0x7FFFFFFF)
3330                         maxwrite = 0x7FFFFFFF;
3331                 *res = (uint32_t)maxwrite;
3332                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3333         }
3334         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3335         return status;
3336 out_overflow:
3337         print_overflow_msg(__func__, xdr);
3338         return -EIO;
3339 }
3340
3341 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3342 {
3343         uint32_t tmp;
3344         __be32 *p;
3345         int ret = 0;
3346
3347         *mode = 0;
3348         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3349                 return -EIO;
3350         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3351                 p = xdr_inline_decode(xdr, 4);
3352                 if (unlikely(!p))
3353                         goto out_overflow;
3354                 tmp = be32_to_cpup(p);
3355                 *mode = tmp & ~S_IFMT;
3356                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3357                 ret = NFS_ATTR_FATTR_MODE;
3358         }
3359         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3360         return ret;
3361 out_overflow:
3362         print_overflow_msg(__func__, xdr);
3363         return -EIO;
3364 }
3365
3366 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3367 {
3368         __be32 *p;
3369         int ret = 0;
3370
3371         *nlink = 1;
3372         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3373                 return -EIO;
3374         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3375                 p = xdr_inline_decode(xdr, 4);
3376                 if (unlikely(!p))
3377                         goto out_overflow;
3378                 *nlink = be32_to_cpup(p);
3379                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3380                 ret = NFS_ATTR_FATTR_NLINK;
3381         }
3382         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3383         return ret;
3384 out_overflow:
3385         print_overflow_msg(__func__, xdr);
3386         return -EIO;
3387 }
3388
3389 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3390                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3391 {
3392         uint32_t len;
3393         __be32 *p;
3394         int ret = 0;
3395
3396         *uid = -2;
3397         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3398                 return -EIO;
3399         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3400                 p = xdr_inline_decode(xdr, 4);
3401                 if (unlikely(!p))
3402                         goto out_overflow;
3403                 len = be32_to_cpup(p);
3404                 p = xdr_inline_decode(xdr, len);
3405                 if (unlikely(!p))
3406                         goto out_overflow;
3407                 if (!may_sleep) {
3408                         /* do nothing */
3409                 } else if (len < XDR_MAX_NETOBJ) {
3410                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3411                                 ret = NFS_ATTR_FATTR_OWNER;
3412                         else
3413                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3414                                                 __func__);
3415                 } else
3416                         dprintk("%s: name too long (%u)!\n",
3417                                         __func__, len);
3418                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3419         }
3420         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3421         return ret;
3422 out_overflow:
3423         print_overflow_msg(__func__, xdr);
3424         return -EIO;
3425 }
3426
3427 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3428                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3429 {
3430         uint32_t len;
3431         __be32 *p;
3432         int ret = 0;
3433
3434         *gid = -2;
3435         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3436                 return -EIO;
3437         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3438                 p = xdr_inline_decode(xdr, 4);
3439                 if (unlikely(!p))
3440                         goto out_overflow;
3441                 len = be32_to_cpup(p);
3442                 p = xdr_inline_decode(xdr, len);
3443                 if (unlikely(!p))
3444                         goto out_overflow;
3445                 if (!may_sleep) {
3446                         /* do nothing */
3447                 } else if (len < XDR_MAX_NETOBJ) {
3448                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3449                                 ret = NFS_ATTR_FATTR_GROUP;
3450                         else
3451                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3452                                                 __func__);
3453                 } else
3454                         dprintk("%s: name too long (%u)!\n",
3455                                         __func__, len);
3456                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3457         }
3458         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3459         return ret;
3460 out_overflow:
3461         print_overflow_msg(__func__, xdr);
3462         return -EIO;
3463 }
3464
3465 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3466 {
3467         uint32_t major = 0, minor = 0;
3468         __be32 *p;
3469         int ret = 0;
3470
3471         *rdev = MKDEV(0,0);
3472         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3473                 return -EIO;
3474         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3475                 dev_t tmp;
3476
3477                 p = xdr_inline_decode(xdr, 8);
3478                 if (unlikely(!p))
3479                         goto out_overflow;
3480                 major = be32_to_cpup(p++);
3481                 minor = be32_to_cpup(p);
3482                 tmp = MKDEV(major, minor);
3483                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3484                         *rdev = tmp;
3485                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3486                 ret = NFS_ATTR_FATTR_RDEV;
3487         }
3488         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3489         return ret;
3490 out_overflow:
3491         print_overflow_msg(__func__, xdr);
3492         return -EIO;
3493 }
3494
3495 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3496 {
3497         __be32 *p;
3498         int status = 0;
3499
3500         *res = 0;
3501         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3502                 return -EIO;
3503         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3504                 p = xdr_inline_decode(xdr, 8);
3505                 if (unlikely(!p))
3506                         goto out_overflow;
3507                 xdr_decode_hyper(p, res);
3508                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3509         }
3510         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3511         return status;
3512 out_overflow:
3513         print_overflow_msg(__func__, xdr);
3514         return -EIO;
3515 }
3516
3517 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3518 {
3519         __be32 *p;
3520         int status = 0;
3521
3522         *res = 0;
3523         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3524                 return -EIO;
3525         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3526                 p = xdr_inline_decode(xdr, 8);
3527                 if (unlikely(!p))
3528                         goto out_overflow;
3529                 xdr_decode_hyper(p, res);
3530                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3531         }
3532         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3533         return status;
3534 out_overflow:
3535         print_overflow_msg(__func__, xdr);
3536         return -EIO;
3537 }
3538
3539 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3540 {
3541         __be32 *p;
3542         int status = 0;
3543
3544         *res = 0;
3545         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3546                 return -EIO;
3547         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3548                 p = xdr_inline_decode(xdr, 8);
3549                 if (unlikely(!p))
3550                         goto out_overflow;
3551                 xdr_decode_hyper(p, res);
3552                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3553         }
3554         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3555         return status;
3556 out_overflow:
3557         print_overflow_msg(__func__, xdr);
3558         return -EIO;
3559 }
3560
3561 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3562 {
3563         __be32 *p;
3564         int ret = 0;
3565
3566         *used = 0;
3567         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3568                 return -EIO;
3569         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3570                 p = xdr_inline_decode(xdr, 8);
3571                 if (unlikely(!p))
3572                         goto out_overflow;
3573                 xdr_decode_hyper(p, used);
3574                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3575                 ret = NFS_ATTR_FATTR_SPACE_USED;
3576         }
3577         dprintk("%s: space used=%Lu\n", __func__,
3578                         (unsigned long long)*used);
3579         return ret;
3580 out_overflow:
3581         print_overflow_msg(__func__, xdr);
3582         return -EIO;
3583 }
3584
3585 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3586 {
3587         __be32 *p;
3588         uint64_t sec;
3589         uint32_t nsec;
3590
3591         p = xdr_inline_decode(xdr, 12);
3592         if (unlikely(!p))
3593                 goto out_overflow;
3594         p = xdr_decode_hyper(p, &sec);
3595         nsec = be32_to_cpup(p);
3596         time->tv_sec = (time_t)sec;
3597         time->tv_nsec = (long)nsec;
3598         return 0;
3599 out_overflow:
3600         print_overflow_msg(__func__, xdr);
3601         return -EIO;
3602 }
3603
3604 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3605 {
3606         int status = 0;
3607
3608         time->tv_sec = 0;
3609         time->tv_nsec = 0;
3610         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3611                 return -EIO;
3612         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3613                 status = decode_attr_time(xdr, time);
3614                 if (status == 0)
3615                         status = NFS_ATTR_FATTR_ATIME;
3616                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3617         }
3618         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3619         return status;
3620 }
3621
3622 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3623 {
3624         int status = 0;
3625
3626         time->tv_sec = 0;
3627         time->tv_nsec = 0;
3628         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3629                 return -EIO;
3630         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3631                 status = decode_attr_time(xdr, time);
3632                 if (status == 0)
3633                         status = NFS_ATTR_FATTR_CTIME;
3634                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3635         }
3636         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3637         return status;
3638 }
3639
3640 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3641                                   struct timespec *time)
3642 {
3643         int status = 0;
3644
3645         time->tv_sec = 0;
3646         time->tv_nsec = 0;
3647         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3648                 return -EIO;
3649         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3650                 status = decode_attr_time(xdr, time);
3651                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3652         }
3653         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3654                 (long)time->tv_nsec);
3655         return status;
3656 }
3657
3658 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3659 {
3660         int status = 0;
3661
3662         time->tv_sec = 0;
3663         time->tv_nsec = 0;
3664         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3665                 return -EIO;
3666         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3667                 status = decode_attr_time(xdr, time);
3668                 if (status == 0)
3669                         status = NFS_ATTR_FATTR_MTIME;
3670                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3671         }
3672         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3673         return status;
3674 }
3675
3676 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3677 {
3678         unsigned int attrwords = XDR_QUADLEN(attrlen);
3679         unsigned int nwords = xdr->p - savep;
3680
3681         if (unlikely(attrwords != nwords)) {
3682                 dprintk("%s: server returned incorrect attribute length: "
3683                         "%u %c %u\n",
3684                                 __func__,
3685                                 attrwords << 2,
3686                                 (attrwords < nwords) ? '<' : '>',
3687                                 nwords << 2);
3688                 return -EIO;
3689         }
3690         return 0;
3691 }
3692
3693 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3694 {
3695         __be32 *p;
3696
3697         p = xdr_inline_decode(xdr, 20);
3698         if (unlikely(!p))
3699                 goto out_overflow;
3700         cinfo->atomic = be32_to_cpup(p++);
3701         p = xdr_decode_hyper(p, &cinfo->before);
3702         xdr_decode_hyper(p, &cinfo->after);
3703         return 0;
3704 out_overflow:
3705         print_overflow_msg(__func__, xdr);
3706         return -EIO;
3707 }
3708
3709 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3710 {
3711         __be32 *p;
3712         uint32_t supp, acc;
3713         int status;
3714
3715         status = decode_op_hdr(xdr, OP_ACCESS);
3716         if (status)
3717                 return status;
3718         p = xdr_inline_decode(xdr, 8);
3719         if (unlikely(!p))
3720                 goto out_overflow;
3721         supp = be32_to_cpup(p++);
3722         acc = be32_to_cpup(p);
3723         access->supported = supp;
3724         access->access = acc;
3725         return 0;
3726 out_overflow:
3727         print_overflow_msg(__func__, xdr);
3728         return -EIO;
3729 }
3730
3731 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3732 {
3733         __be32 *p;
3734
3735         p = xdr_inline_decode(xdr, len);
3736         if (likely(p)) {
3737                 memcpy(buf, p, len);
3738                 return 0;
3739         }
3740         print_overflow_msg(__func__, xdr);
3741         return -EIO;
3742 }
3743
3744 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3745 {
3746         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3747 }
3748
3749 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3750 {
3751         int status;
3752
3753         status = decode_op_hdr(xdr, OP_CLOSE);
3754         if (status != -EIO)
3755                 nfs_increment_open_seqid(status, res->seqid);
3756         if (!status)
3757                 status = decode_stateid(xdr, &res->stateid);
3758         return status;
3759 }
3760
3761 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3762 {
3763         return decode_opaque_fixed(xdr, verifier, 8);
3764 }
3765
3766 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3767 {
3768         int status;
3769
3770         status = decode_op_hdr(xdr, OP_COMMIT);
3771         if (!status)
3772                 status = decode_verifier(xdr, res->verf->verifier);
3773         return status;
3774 }
3775
3776 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3777 {
3778         __be32 *p;
3779         uint32_t bmlen;
3780         int status;
3781
3782         status = decode_op_hdr(xdr, OP_CREATE);
3783         if (status)
3784                 return status;
3785         if ((status = decode_change_info(xdr, cinfo)))
3786                 return status;
3787         p = xdr_inline_decode(xdr, 4);
3788         if (unlikely(!p))
3789                 goto out_overflow;
3790         bmlen = be32_to_cpup(p);
3791         p = xdr_inline_decode(xdr, bmlen << 2);
3792         if (likely(p))
3793                 return 0;
3794 out_overflow:
3795         print_overflow_msg(__func__, xdr);
3796         return -EIO;
3797 }
3798
3799 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3800 {
3801         __be32 *savep;
3802         uint32_t attrlen, bitmap[2] = {0};
3803         int status;
3804
3805         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3806                 goto xdr_error;
3807         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3808                 goto xdr_error;
3809         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3810                 goto xdr_error;
3811         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3812                 goto xdr_error;
3813         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3814                 goto xdr_error;
3815         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3816                 goto xdr_error;
3817         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3818                 goto xdr_error;
3819         status = verify_attr_len(xdr, savep, attrlen);
3820 xdr_error:
3821         dprintk("%s: xdr returned %d!\n", __func__, -status);
3822         return status;
3823 }
3824
3825 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3826 {
3827         __be32 *savep;
3828         uint32_t attrlen, bitmap[2] = {0};
3829         int status;
3830
3831         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3832                 goto xdr_error;
3833         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3834                 goto xdr_error;
3835         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3836                 goto xdr_error;
3837
3838         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3839                 goto xdr_error;
3840         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3841                 goto xdr_error;
3842         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3843                 goto xdr_error;
3844         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3845                 goto xdr_error;
3846         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3847                 goto xdr_error;
3848         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3849                 goto xdr_error;
3850
3851         status = verify_attr_len(xdr, savep, attrlen);
3852 xdr_error:
3853         dprintk("%s: xdr returned %d!\n", __func__, -status);
3854         return status;
3855 }
3856
3857 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3858 {
3859         __be32 *savep;
3860         uint32_t attrlen, bitmap[2] = {0};
3861         int status;
3862
3863         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3864                 goto xdr_error;
3865         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3866                 goto xdr_error;
3867         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3868                 goto xdr_error;
3869
3870         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3871                 goto xdr_error;
3872         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3873                 goto xdr_error;
3874
3875         status = verify_attr_len(xdr, savep, attrlen);
3876 xdr_error:
3877         dprintk("%s: xdr returned %d!\n", __func__, -status);
3878         return status;
3879 }
3880
3881 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3882                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3883                 const struct nfs_server *server, int may_sleep)
3884 {
3885         int status;
3886         umode_t fmode = 0;
3887         uint64_t fileid;
3888         uint32_t type;
3889
3890         status = decode_attr_type(xdr, bitmap, &type);
3891         if (status < 0)
3892                 goto xdr_error;
3893         fattr->mode = 0;
3894         if (status != 0) {
3895                 fattr->mode |= nfs_type2fmt[type];
3896                 fattr->valid |= status;
3897         }
3898
3899         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3900         if (status < 0)
3901                 goto xdr_error;
3902         fattr->valid |= status;
3903
3904         status = decode_attr_size(xdr, bitmap, &fattr->size);
3905         if (status < 0)
3906                 goto xdr_error;
3907         fattr->valid |= status;
3908
3909         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3910         if (status < 0)
3911                 goto xdr_error;
3912         fattr->valid |= status;
3913
3914         status = decode_attr_error(xdr, bitmap);
3915         if (status < 0)
3916                 goto xdr_error;
3917
3918         status = decode_attr_filehandle(xdr, bitmap, fh);
3919         if (status < 0)
3920                 goto xdr_error;
3921
3922         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3923         if (status < 0)
3924                 goto xdr_error;
3925         fattr->valid |= status;
3926
3927         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3928                                                 struct nfs4_fs_locations,
3929                                                 fattr));
3930         if (status < 0)
3931                 goto xdr_error;
3932         fattr->valid |= status;
3933
3934         status = decode_attr_mode(xdr, bitmap, &fmode);
3935         if (status < 0)
3936                 goto xdr_error;
3937         if (status != 0) {
3938                 fattr->mode |= fmode;
3939                 fattr->valid |= status;
3940         }
3941
3942         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3943         if (status < 0)
3944                 goto xdr_error;
3945         fattr->valid |= status;
3946
3947         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3948                         &fattr->uid, may_sleep);
3949         if (status < 0)
3950                 goto xdr_error;
3951         fattr->valid |= status;
3952
3953         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3954                         &fattr->gid, may_sleep);
3955         if (status < 0)
3956                 goto xdr_error;
3957         fattr->valid |= status;
3958
3959         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3960         if (status < 0)
3961                 goto xdr_error;
3962         fattr->valid |= status;
3963
3964         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3965         if (status < 0)
3966                 goto xdr_error;
3967         fattr->valid |= status;
3968
3969         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3970         if (status < 0)
3971                 goto xdr_error;
3972         fattr->valid |= status;
3973
3974         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3975         if (status < 0)
3976                 goto xdr_error;
3977         fattr->valid |= status;
3978
3979         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3980         if (status < 0)
3981                 goto xdr_error;
3982         fattr->valid |= status;
3983
3984         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3985         if (status < 0)
3986                 goto xdr_error;
3987         if (status != 0 && !(fattr->valid & status)) {
3988                 fattr->fileid = fileid;
3989                 fattr->valid |= status;
3990         }
3991
3992 xdr_error:
3993         dprintk("%s: xdr returned %d\n", __func__, -status);
3994         return status;
3995 }
3996
3997 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3998                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3999 {
4000         __be32 *savep;
4001         uint32_t attrlen,
4002                  bitmap[2] = {0};
4003         int status;
4004
4005         status = decode_op_hdr(xdr, OP_GETATTR);
4006         if (status < 0)
4007                 goto xdr_error;
4008
4009         status = decode_attr_bitmap(xdr, bitmap);
4010         if (status < 0)
4011                 goto xdr_error;
4012
4013         status = decode_attr_length(xdr, &attrlen, &savep);
4014         if (status < 0)
4015                 goto xdr_error;
4016
4017         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4018         if (status < 0)
4019                 goto xdr_error;
4020
4021         status = verify_attr_len(xdr, savep, attrlen);
4022 xdr_error:
4023         dprintk("%s: xdr returned %d\n", __func__, -status);
4024         return status;
4025 }
4026
4027 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4028                 const struct nfs_server *server, int may_sleep)
4029 {
4030         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4031 }
4032
4033 /*
4034  * Decode potentially multiple layout types. Currently we only support
4035  * one layout driver per file system.
4036  */
4037 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4038                                          uint32_t *layouttype)
4039 {
4040         uint32_t *p;
4041         int num;
4042
4043         p = xdr_inline_decode(xdr, 4);
4044         if (unlikely(!p))
4045                 goto out_overflow;
4046         num = be32_to_cpup(p);
4047
4048         /* pNFS is not supported by the underlying file system */
4049         if (num == 0) {
4050                 *layouttype = 0;
4051                 return 0;
4052         }
4053         if (num > 1)
4054                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4055                         "per filesystem not supported\n", __func__);
4056
4057         /* Decode and set first layout type, move xdr->p past unused types */
4058         p = xdr_inline_decode(xdr, num * 4);
4059         if (unlikely(!p))
4060                 goto out_overflow;
4061         *layouttype = be32_to_cpup(p);
4062         return 0;
4063 out_overflow:
4064         print_overflow_msg(__func__, xdr);
4065         return -EIO;
4066 }
4067
4068 /*
4069  * The type of file system exported.
4070  * Note we must ensure that layouttype is set in any non-error case.
4071  */
4072 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4073                                 uint32_t *layouttype)
4074 {
4075         int status = 0;
4076
4077         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4078         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4079                 return -EIO;
4080         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4081                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4082                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4083         } else
4084                 *layouttype = 0;
4085         return status;
4086 }
4087
4088 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4089 {
4090         __be32 *savep;
4091         uint32_t attrlen, bitmap[2];
4092         int status;
4093
4094         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4095                 goto xdr_error;
4096         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4097                 goto xdr_error;
4098         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4099                 goto xdr_error;
4100
4101         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4102
4103         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4104                 goto xdr_error;
4105         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4106                 goto xdr_error;
4107         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4108                 goto xdr_error;
4109         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4110         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4111                 goto xdr_error;
4112         fsinfo->wtpref = fsinfo->wtmax;
4113         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4114         if (status != 0)
4115                 goto xdr_error;
4116         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4117         if (status != 0)
4118                 goto xdr_error;
4119
4120         status = verify_attr_len(xdr, savep, attrlen);
4121 xdr_error:
4122         dprintk("%s: xdr returned %d!\n", __func__, -status);
4123         return status;
4124 }
4125
4126 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4127 {
4128         __be32 *p;
4129         uint32_t len;
4130         int status;
4131
4132         /* Zero handle first to allow comparisons */
4133         memset(fh, 0, sizeof(*fh));
4134
4135         status = decode_op_hdr(xdr, OP_GETFH);
4136         if (status)
4137                 return status;
4138
4139         p = xdr_inline_decode(xdr, 4);
4140         if (unlikely(!p))
4141                 goto out_overflow;
4142         len = be32_to_cpup(p);
4143         if (len > NFS4_FHSIZE)
4144                 return -EIO;
4145         fh->size = len;
4146         p = xdr_inline_decode(xdr, len);
4147         if (unlikely(!p))
4148                 goto out_overflow;
4149         memcpy(fh->data, p, len);
4150         return 0;
4151 out_overflow:
4152         print_overflow_msg(__func__, xdr);
4153         return -EIO;
4154 }
4155
4156 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4157 {
4158         int status;
4159
4160         status = decode_op_hdr(xdr, OP_LINK);
4161         if (status)
4162                 return status;
4163         return decode_change_info(xdr, cinfo);
4164 }
4165
4166 /*
4167  * We create the owner, so we know a proper owner.id length is 4.
4168  */
4169 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4170 {
4171         uint64_t offset, length, clientid;
4172         __be32 *p;
4173         uint32_t namelen, type;
4174
4175         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4176         if (unlikely(!p))
4177                 goto out_overflow;
4178         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4179         p = xdr_decode_hyper(p, &length);
4180         type = be32_to_cpup(p++); /* 4 byte read */
4181         if (fl != NULL) { /* manipulate file lock */
4182                 fl->fl_start = (loff_t)offset;
4183                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4184                 if (length == ~(uint64_t)0)
4185                         fl->fl_end = OFFSET_MAX;
4186                 fl->fl_type = F_WRLCK;
4187                 if (type & 1)
4188                         fl->fl_type = F_RDLCK;
4189                 fl->fl_pid = 0;
4190         }
4191         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4192         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4193         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4194         if (likely(p))
4195                 return -NFS4ERR_DENIED;
4196 out_overflow:
4197         print_overflow_msg(__func__, xdr);
4198         return -EIO;
4199 }
4200
4201 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4202 {
4203         int status;
4204
4205         status = decode_op_hdr(xdr, OP_LOCK);
4206         if (status == -EIO)
4207                 goto out;
4208         if (status == 0) {
4209                 status = decode_stateid(xdr, &res->stateid);
4210                 if (unlikely(status))
4211                         goto out;
4212         } else if (status == -NFS4ERR_DENIED)
4213                 status = decode_lock_denied(xdr, NULL);
4214         if (res->open_seqid != NULL)
4215                 nfs_increment_open_seqid(status, res->open_seqid);
4216         nfs_increment_lock_seqid(status, res->lock_seqid);
4217 out:
4218         return status;
4219 }
4220
4221 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4222 {
4223         int status;
4224         status = decode_op_hdr(xdr, OP_LOCKT);
4225         if (status == -NFS4ERR_DENIED)
4226                 return decode_lock_denied(xdr, res->denied);
4227         return status;
4228 }
4229
4230 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4231 {
4232         int status;
4233
4234         status = decode_op_hdr(xdr, OP_LOCKU);
4235         if (status != -EIO)
4236                 nfs_increment_lock_seqid(status, res->seqid);
4237         if (status == 0)
4238                 status = decode_stateid(xdr, &res->stateid);
4239         return status;
4240 }
4241
4242 static int decode_release_lockowner(struct xdr_stream *xdr)
4243 {
4244         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4245 }
4246
4247 static int decode_lookup(struct xdr_stream *xdr)
4248 {
4249         return decode_op_hdr(xdr, OP_LOOKUP);
4250 }
4251
4252 /* This is too sick! */
4253 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4254 {
4255         __be32 *p;
4256         uint32_t limit_type, nblocks, blocksize;
4257
4258         p = xdr_inline_decode(xdr, 12);
4259         if (unlikely(!p))
4260                 goto out_overflow;
4261         limit_type = be32_to_cpup(p++);
4262         switch (limit_type) {
4263         case 1:
4264                 xdr_decode_hyper(p, maxsize);
4265                 break;
4266         case 2:
4267                 nblocks = be32_to_cpup(p++);
4268                 blocksize = be32_to_cpup(p);
4269                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4270         }
4271         return 0;
4272 out_overflow:
4273         print_overflow_msg(__func__, xdr);
4274         return -EIO;
4275 }
4276
4277 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4278 {
4279         __be32 *p;
4280         uint32_t delegation_type;
4281         int status;
4282
4283         p = xdr_inline_decode(xdr, 4);
4284         if (unlikely(!p))
4285                 goto out_overflow;
4286         delegation_type = be32_to_cpup(p);
4287         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4288                 res->delegation_type = 0;
4289                 return 0;
4290         }
4291         status = decode_stateid(xdr, &res->delegation);
4292         if (unlikely(status))
4293                 return status;
4294         p = xdr_inline_decode(xdr, 4);
4295         if (unlikely(!p))
4296                 goto out_overflow;
4297         res->do_recall = be32_to_cpup(p);
4298
4299         switch (delegation_type) {
4300         case NFS4_OPEN_DELEGATE_READ:
4301                 res->delegation_type = FMODE_READ;
4302                 break;
4303         case NFS4_OPEN_DELEGATE_WRITE:
4304                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4305                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4306                                 return -EIO;
4307         }
4308         return decode_ace(xdr, NULL, res->server->nfs_client);
4309 out_overflow:
4310         print_overflow_msg(__func__, xdr);
4311         return -EIO;
4312 }
4313
4314 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4315 {
4316         __be32 *p;
4317         uint32_t savewords, bmlen, i;
4318         int status;
4319
4320         status = decode_op_hdr(xdr, OP_OPEN);
4321         if (status != -EIO)
4322                 nfs_increment_open_seqid(status, res->seqid);
4323         if (!status)
4324                 status = decode_stateid(xdr, &res->stateid);
4325         if (unlikely(status))
4326                 return status;
4327
4328         decode_change_info(xdr, &res->cinfo);
4329
4330         p = xdr_inline_decode(xdr, 8);
4331         if (unlikely(!p))
4332                 goto out_overflow;
4333         res->rflags = be32_to_cpup(p++);
4334         bmlen = be32_to_cpup(p);
4335         if (bmlen > 10)
4336                 goto xdr_error;
4337
4338         p = xdr_inline_decode(xdr, bmlen << 2);
4339         if (unlikely(!p))
4340                 goto out_overflow;
4341         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4342         for (i = 0; i < savewords; ++i)
4343                 res->attrset[i] = be32_to_cpup(p++);
4344         for (; i < NFS4_BITMAP_SIZE; i++)
4345                 res->attrset[i] = 0;
4346
4347         return decode_delegation(xdr, res);
4348 xdr_error:
4349         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4350         return -EIO;
4351 out_overflow:
4352         print_overflow_msg(__func__, xdr);
4353         return -EIO;
4354 }
4355
4356 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4357 {
4358         int status;
4359
4360         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4361         if (status != -EIO)
4362                 nfs_increment_open_seqid(status, res->seqid);
4363         if (!status)
4364                 status = decode_stateid(xdr, &res->stateid);
4365         return status;
4366 }
4367
4368 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4369 {
4370         int status;
4371
4372         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4373         if (status != -EIO)
4374                 nfs_increment_open_seqid(status, res->seqid);
4375         if (!status)
4376                 status = decode_stateid(xdr, &res->stateid);
4377         return status;
4378 }
4379
4380 static int decode_putfh(struct xdr_stream *xdr)
4381 {
4382         return decode_op_hdr(xdr, OP_PUTFH);
4383 }
4384
4385 static int decode_putrootfh(struct xdr_stream *xdr)
4386 {
4387         return decode_op_hdr(xdr, OP_PUTROOTFH);
4388 }
4389
4390 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4391 {
4392         struct kvec *iov = req->rq_rcv_buf.head;
4393         __be32 *p;
4394         uint32_t count, eof, recvd, hdrlen;
4395         int status;
4396
4397         status = decode_op_hdr(xdr, OP_READ);
4398         if (status)
4399                 return status;
4400         p = xdr_inline_decode(xdr, 8);
4401         if (unlikely(!p))
4402                 goto out_overflow;
4403         eof = be32_to_cpup(p++);
4404         count = be32_to_cpup(p);
4405         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4406         recvd = req->rq_rcv_buf.len - hdrlen;
4407         if (count > recvd) {
4408                 dprintk("NFS: server cheating in read reply: "
4409                                 "count %u > recvd %u\n", count, recvd);
4410                 count = recvd;
4411                 eof = 0;
4412         }
4413         xdr_read_pages(xdr, count);
4414         res->eof = eof;
4415         res->count = count;
4416         return 0;
4417 out_overflow:
4418         print_overflow_msg(__func__, xdr);
4419         return -EIO;
4420 }
4421
4422 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4423 {
4424         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4425         struct kvec     *iov = rcvbuf->head;
4426         size_t          hdrlen;
4427         u32             recvd, pglen = rcvbuf->page_len;
4428         int             status;
4429
4430         status = decode_op_hdr(xdr, OP_READDIR);
4431         if (!status)
4432                 status = decode_verifier(xdr, readdir->verifier.data);
4433         if (unlikely(status))
4434                 return status;
4435         dprintk("%s: verifier = %08x:%08x\n",
4436                         __func__,
4437                         ((u32 *)readdir->verifier.data)[0],
4438                         ((u32 *)readdir->verifier.data)[1]);
4439
4440
4441         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4442         recvd = rcvbuf->len - hdrlen;
4443         if (pglen > recvd)
4444                 pglen = recvd;
4445         xdr_read_pages(xdr, pglen);
4446
4447
4448         return pglen;
4449 }
4450
4451 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4452 {
4453         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4454         struct kvec *iov = rcvbuf->head;
4455         size_t hdrlen;
4456         u32 len, recvd;
4457         __be32 *p;
4458         int status;
4459
4460         status = decode_op_hdr(xdr, OP_READLINK);
4461         if (status)
4462                 return status;
4463
4464         /* Convert length of symlink */
4465         p = xdr_inline_decode(xdr, 4);
4466         if (unlikely(!p))
4467                 goto out_overflow;
4468         len = be32_to_cpup(p);
4469         if (len >= rcvbuf->page_len || len <= 0) {
4470                 dprintk("nfs: server returned giant symlink!\n");
4471                 return -ENAMETOOLONG;
4472         }
4473         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4474         recvd = req->rq_rcv_buf.len - hdrlen;
4475         if (recvd < len) {
4476                 dprintk("NFS: server cheating in readlink reply: "
4477                                 "count %u > recvd %u\n", len, recvd);
4478                 return -EIO;
4479         }
4480         xdr_read_pages(xdr, len);
4481         /*
4482          * The XDR encode routine has set things up so that
4483          * the link text will be copied directly into the
4484          * buffer.  We just have to do overflow-checking,
4485          * and and null-terminate the text (the VFS expects
4486          * null-termination).
4487          */
4488         xdr_terminate_string(rcvbuf, len);
4489         return 0;
4490 out_overflow:
4491         print_overflow_msg(__func__, xdr);
4492         return -EIO;
4493 }
4494
4495 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4496 {
4497         int status;
4498
4499         status = decode_op_hdr(xdr, OP_REMOVE);
4500         if (status)
4501                 goto out;
4502         status = decode_change_info(xdr, cinfo);
4503 out:
4504         return status;
4505 }
4506
4507 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4508               struct nfs4_change_info *new_cinfo)
4509 {
4510         int status;
4511
4512         status = decode_op_hdr(xdr, OP_RENAME);
4513         if (status)
4514                 goto out;
4515         if ((status = decode_change_info(xdr, old_cinfo)))
4516                 goto out;
4517         status = decode_change_info(xdr, new_cinfo);
4518 out:
4519         return status;
4520 }
4521
4522 static int decode_renew(struct xdr_stream *xdr)
4523 {
4524         return decode_op_hdr(xdr, OP_RENEW);
4525 }
4526
4527 static int
4528 decode_restorefh(struct xdr_stream *xdr)
4529 {
4530         return decode_op_hdr(xdr, OP_RESTOREFH);
4531 }
4532
4533 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4534                 size_t *acl_len)
4535 {
4536         __be32 *savep;
4537         uint32_t attrlen,
4538                  bitmap[2] = {0};
4539         struct kvec *iov = req->rq_rcv_buf.head;
4540         int status;
4541
4542         *acl_len = 0;
4543         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4544                 goto out;
4545         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4546                 goto out;
4547         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4548                 goto out;
4549
4550         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4551                 return -EIO;
4552         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4553                 size_t hdrlen;
4554                 u32 recvd;
4555
4556                 /* We ignore &savep and don't do consistency checks on
4557                  * the attr length.  Let userspace figure it out.... */
4558                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4559                 recvd = req->rq_rcv_buf.len - hdrlen;
4560                 if (attrlen > recvd) {
4561                         dprintk("NFS: server cheating in getattr"
4562                                         " acl reply: attrlen %u > recvd %u\n",
4563                                         attrlen, recvd);
4564                         return -EINVAL;
4565                 }
4566                 xdr_read_pages(xdr, attrlen);
4567                 *acl_len = attrlen;
4568         } else
4569                 status = -EOPNOTSUPP;
4570
4571 out:
4572         return status;
4573 }
4574
4575 static int
4576 decode_savefh(struct xdr_stream *xdr)
4577 {
4578         return decode_op_hdr(xdr, OP_SAVEFH);
4579 }
4580
4581 static int decode_setattr(struct xdr_stream *xdr)
4582 {
4583         __be32 *p;
4584         uint32_t bmlen;
4585         int status;
4586
4587         status = decode_op_hdr(xdr, OP_SETATTR);
4588         if (status)
4589                 return status;
4590         p = xdr_inline_decode(xdr, 4);
4591         if (unlikely(!p))
4592                 goto out_overflow;
4593         bmlen = be32_to_cpup(p);
4594         p = xdr_inline_decode(xdr, bmlen << 2);
4595         if (likely(p))
4596                 return 0;
4597 out_overflow:
4598         print_overflow_msg(__func__, xdr);
4599         return -EIO;
4600 }
4601
4602 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4603 {
4604         __be32 *p;
4605         uint32_t opnum;
4606         int32_t nfserr;
4607
4608         p = xdr_inline_decode(xdr, 8);
4609         if (unlikely(!p))
4610                 goto out_overflow;
4611         opnum = be32_to_cpup(p++);
4612         if (opnum != OP_SETCLIENTID) {
4613                 dprintk("nfs: decode_setclientid: Server returned operation"
4614                         " %d\n", opnum);
4615                 return -EIO;
4616         }
4617         nfserr = be32_to_cpup(p);
4618         if (nfserr == NFS_OK) {
4619                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4620                 if (unlikely(!p))
4621                         goto out_overflow;
4622                 p = xdr_decode_hyper(p, &res->clientid);
4623                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4624         } else if (nfserr == NFSERR_CLID_INUSE) {
4625                 uint32_t len;
4626
4627                 /* skip netid string */
4628                 p = xdr_inline_decode(xdr, 4);
4629                 if (unlikely(!p))
4630                         goto out_overflow;
4631                 len = be32_to_cpup(p);
4632                 p = xdr_inline_decode(xdr, len);
4633                 if (unlikely(!p))
4634                         goto out_overflow;
4635
4636                 /* skip uaddr string */
4637                 p = xdr_inline_decode(xdr, 4);
4638                 if (unlikely(!p))
4639                         goto out_overflow;
4640                 len = be32_to_cpup(p);
4641                 p = xdr_inline_decode(xdr, len);
4642                 if (unlikely(!p))
4643                         goto out_overflow;
4644                 return -NFSERR_CLID_INUSE;
4645         } else
4646                 return nfs4_stat_to_errno(nfserr);
4647
4648         return 0;
4649 out_overflow:
4650         print_overflow_msg(__func__, xdr);
4651         return -EIO;
4652 }
4653
4654 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4655 {
4656         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4657 }
4658
4659 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4660 {
4661         __be32 *p;
4662         int status;
4663
4664         status = decode_op_hdr(xdr, OP_WRITE);
4665         if (status)
4666                 return status;
4667
4668         p = xdr_inline_decode(xdr, 16);
4669         if (unlikely(!p))
4670                 goto out_overflow;
4671         res->count = be32_to_cpup(p++);
4672         res->verf->committed = be32_to_cpup(p++);
4673         memcpy(res->verf->verifier, p, 8);
4674         return 0;
4675 out_overflow:
4676         print_overflow_msg(__func__, xdr);
4677         return -EIO;
4678 }
4679
4680 static int decode_delegreturn(struct xdr_stream *xdr)
4681 {
4682         return decode_op_hdr(xdr, OP_DELEGRETURN);
4683 }
4684
4685 #if defined(CONFIG_NFS_V4_1)
4686 static int decode_exchange_id(struct xdr_stream *xdr,
4687                               struct nfs41_exchange_id_res *res)
4688 {
4689         __be32 *p;
4690         uint32_t dummy;
4691         char *dummy_str;
4692         int status;
4693         struct nfs_client *clp = res->client;
4694
4695         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4696         if (status)
4697                 return status;
4698
4699         p = xdr_inline_decode(xdr, 8);
4700         if (unlikely(!p))
4701                 goto out_overflow;
4702         xdr_decode_hyper(p, &clp->cl_clientid);
4703         p = xdr_inline_decode(xdr, 12);
4704         if (unlikely(!p))
4705                 goto out_overflow;
4706         clp->cl_seqid = be32_to_cpup(p++);
4707         clp->cl_exchange_flags = be32_to_cpup(p++);
4708
4709         /* We ask for SP4_NONE */
4710         dummy = be32_to_cpup(p);
4711         if (dummy != SP4_NONE)
4712                 return -EIO;
4713
4714         /* Throw away minor_id */
4715         p = xdr_inline_decode(xdr, 8);
4716         if (unlikely(!p))
4717                 goto out_overflow;
4718
4719         /* Throw away Major id */
4720         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4721         if (unlikely(status))
4722                 return status;
4723
4724         /* Throw away server_scope */
4725         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4726         if (unlikely(status))
4727                 return status;
4728
4729         /* Throw away Implementation id array */
4730         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4731         if (unlikely(status))
4732                 return status;
4733
4734         return 0;
4735 out_overflow:
4736         print_overflow_msg(__func__, xdr);
4737         return -EIO;
4738 }
4739
4740 static int decode_chan_attrs(struct xdr_stream *xdr,
4741                              struct nfs4_channel_attrs *attrs)
4742 {
4743         __be32 *p;
4744         u32 nr_attrs;
4745
4746         p = xdr_inline_decode(xdr, 28);
4747         if (unlikely(!p))
4748                 goto out_overflow;
4749         attrs->headerpadsz = be32_to_cpup(p++);
4750         attrs->max_rqst_sz = be32_to_cpup(p++);
4751         attrs->max_resp_sz = be32_to_cpup(p++);
4752         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4753         attrs->max_ops = be32_to_cpup(p++);
4754         attrs->max_reqs = be32_to_cpup(p++);
4755         nr_attrs = be32_to_cpup(p);
4756         if (unlikely(nr_attrs > 1)) {
4757                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4758                         __func__, nr_attrs);
4759                 return -EINVAL;
4760         }
4761         if (nr_attrs == 1) {
4762                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4763                 if (unlikely(!p))
4764                         goto out_overflow;
4765         }
4766         return 0;
4767 out_overflow:
4768         print_overflow_msg(__func__, xdr);
4769         return -EIO;
4770 }
4771
4772 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4773 {
4774         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4775 }
4776
4777 static int decode_create_session(struct xdr_stream *xdr,
4778                                  struct nfs41_create_session_res *res)
4779 {
4780         __be32 *p;
4781         int status;
4782         struct nfs_client *clp = res->client;
4783         struct nfs4_session *session = clp->cl_session;
4784
4785         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4786         if (!status)
4787                 status = decode_sessionid(xdr, &session->sess_id);
4788         if (unlikely(status))
4789                 return status;
4790
4791         /* seqid, flags */
4792         p = xdr_inline_decode(xdr, 8);
4793         if (unlikely(!p))
4794                 goto out_overflow;
4795         clp->cl_seqid = be32_to_cpup(p++);
4796         session->flags = be32_to_cpup(p);
4797
4798         /* Channel attributes */
4799         status = decode_chan_attrs(xdr, &session->fc_attrs);
4800         if (!status)
4801                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4802         return status;
4803 out_overflow:
4804         print_overflow_msg(__func__, xdr);
4805         return -EIO;
4806 }
4807
4808 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4809 {
4810         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4811 }
4812
4813 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4814 {
4815         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4816 }
4817 #endif /* CONFIG_NFS_V4_1 */
4818
4819 static int decode_sequence(struct xdr_stream *xdr,
4820                            struct nfs4_sequence_res *res,
4821                            struct rpc_rqst *rqstp)
4822 {
4823 #if defined(CONFIG_NFS_V4_1)
4824         struct nfs4_sessionid id;
4825         u32 dummy;
4826         int status;
4827         __be32 *p;
4828
4829         if (!res->sr_session)
4830                 return 0;
4831
4832         status = decode_op_hdr(xdr, OP_SEQUENCE);
4833         if (!status)
4834                 status = decode_sessionid(xdr, &id);
4835         if (unlikely(status))
4836                 goto out_err;
4837
4838         /*
4839          * If the server returns different values for sessionID, slotID or
4840          * sequence number, the server is looney tunes.
4841          */
4842         status = -EREMOTEIO;
4843
4844         if (memcmp(id.data, res->sr_session->sess_id.data,
4845                    NFS4_MAX_SESSIONID_LEN)) {
4846                 dprintk("%s Invalid session id\n", __func__);
4847                 goto out_err;
4848         }
4849
4850         p = xdr_inline_decode(xdr, 20);
4851         if (unlikely(!p))
4852                 goto out_overflow;
4853
4854         /* seqid */
4855         dummy = be32_to_cpup(p++);
4856         if (dummy != res->sr_slot->seq_nr) {
4857                 dprintk("%s Invalid sequence number\n", __func__);
4858                 goto out_err;
4859         }
4860         /* slot id */
4861         dummy = be32_to_cpup(p++);
4862         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4863                 dprintk("%s Invalid slot id\n", __func__);
4864                 goto out_err;
4865         }
4866         /* highest slot id - currently not processed */
4867         dummy = be32_to_cpup(p++);
4868         /* target highest slot id - currently not processed */
4869         dummy = be32_to_cpup(p++);
4870         /* result flags */
4871         res->sr_status_flags = be32_to_cpup(p);
4872         status = 0;
4873 out_err:
4874         res->sr_status = status;
4875         return status;
4876 out_overflow:
4877         print_overflow_msg(__func__, xdr);
4878         status = -EIO;
4879         goto out_err;
4880 #else  /* CONFIG_NFS_V4_1 */
4881         return 0;
4882 #endif /* CONFIG_NFS_V4_1 */
4883 }
4884
4885 #if defined(CONFIG_NFS_V4_1)
4886
4887 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4888                                 struct pnfs_device *pdev)
4889 {
4890         __be32 *p;
4891         uint32_t len, type;
4892         int status;
4893
4894         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4895         if (status) {
4896                 if (status == -ETOOSMALL) {
4897                         p = xdr_inline_decode(xdr, 4);
4898                         if (unlikely(!p))
4899                                 goto out_overflow;
4900                         pdev->mincount = be32_to_cpup(p);
4901                         dprintk("%s: Min count too small. mincnt = %u\n",
4902                                 __func__, pdev->mincount);
4903                 }
4904                 return status;
4905         }
4906
4907         p = xdr_inline_decode(xdr, 8);
4908         if (unlikely(!p))
4909                 goto out_overflow;
4910         type = be32_to_cpup(p++);
4911         if (type != pdev->layout_type) {
4912                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4913                         __func__, pdev->layout_type, type);
4914                 return -EINVAL;
4915         }
4916         /*
4917          * Get the length of the opaque device_addr4. xdr_read_pages places
4918          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4919          * and places the remaining xdr data in xdr_buf->tail
4920          */
4921         pdev->mincount = be32_to_cpup(p);
4922         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4923
4924         /* Parse notification bitmap, verifying that it is zero. */
4925         p = xdr_inline_decode(xdr, 4);
4926         if (unlikely(!p))
4927                 goto out_overflow;
4928         len = be32_to_cpup(p);
4929         if (len) {
4930                 uint32_t i;
4931
4932                 p = xdr_inline_decode(xdr, 4 * len);
4933                 if (unlikely(!p))
4934                         goto out_overflow;
4935                 for (i = 0; i < len; i++, p++) {
4936                         if (be32_to_cpup(p)) {
4937                                 dprintk("%s: notifications not supported\n",
4938                                         __func__);
4939                                 return -EIO;
4940                         }
4941                 }
4942         }
4943         return 0;
4944 out_overflow:
4945         print_overflow_msg(__func__, xdr);
4946         return -EIO;
4947 }
4948
4949 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
4950                             struct nfs4_layoutget_res *res)
4951 {
4952         __be32 *p;
4953         int status;
4954         u32 layout_count;
4955
4956         status = decode_op_hdr(xdr, OP_LAYOUTGET);
4957         if (status)
4958                 return status;
4959         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
4960         if (unlikely(!p))
4961                 goto out_overflow;
4962         res->return_on_close = be32_to_cpup(p++);
4963         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
4964         layout_count = be32_to_cpup(p);
4965         if (!layout_count) {
4966                 dprintk("%s: server responded with empty layout array\n",
4967                         __func__);
4968                 return -EINVAL;
4969         }
4970
4971         p = xdr_inline_decode(xdr, 24);
4972         if (unlikely(!p))
4973                 goto out_overflow;
4974         p = xdr_decode_hyper(p, &res->range.offset);
4975         p = xdr_decode_hyper(p, &res->range.length);
4976         res->range.iomode = be32_to_cpup(p++);
4977         res->type = be32_to_cpup(p++);
4978
4979         status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
4980         if (unlikely(status))
4981                 return status;
4982
4983         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
4984                 __func__,
4985                 (unsigned long)res->range.offset,
4986                 (unsigned long)res->range.length,
4987                 res->range.iomode,
4988                 res->type,
4989                 res->layout.len);
4990
4991         /* nfs4_proc_layoutget allocated a single page */
4992         if (res->layout.len > PAGE_SIZE)
4993                 return -ENOMEM;
4994         memcpy(res->layout.buf, p, res->layout.len);
4995
4996         if (layout_count > 1) {
4997                 /* We only handle a length one array at the moment.  Any
4998                  * further entries are just ignored.  Note that this means
4999                  * the client may see a response that is less than the
5000                  * minimum it requested.
5001                  */
5002                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5003                         __func__, layout_count);
5004         }
5005
5006         return 0;
5007 out_overflow:
5008         print_overflow_msg(__func__, xdr);
5009         return -EIO;
5010 }
5011 #endif /* CONFIG_NFS_V4_1 */
5012
5013 /*
5014  * END OF "GENERIC" DECODE ROUTINES.
5015  */
5016
5017 /*
5018  * Decode OPEN_DOWNGRADE response
5019  */
5020 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5021                                        struct xdr_stream *xdr,
5022                                        struct nfs_closeres *res)
5023 {
5024         struct compound_hdr hdr;
5025         int status;
5026
5027         status = decode_compound_hdr(xdr, &hdr);
5028         if (status)
5029                 goto out;
5030         status = decode_sequence(xdr, &res->seq_res, rqstp);
5031         if (status)
5032                 goto out;
5033         status = decode_putfh(xdr);
5034         if (status)
5035                 goto out;
5036         status = decode_open_downgrade(xdr, res);
5037         if (status != 0)
5038                 goto out;
5039         decode_getfattr(xdr, res->fattr, res->server,
5040                         !RPC_IS_ASYNC(rqstp->rq_task));
5041 out:
5042         return status;
5043 }
5044
5045 /*
5046  * Decode ACCESS response
5047  */
5048 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5049                                struct nfs4_accessres *res)
5050 {
5051         struct compound_hdr hdr;
5052         int status;
5053
5054         status = decode_compound_hdr(xdr, &hdr);
5055         if (status)
5056                 goto out;
5057         status = decode_sequence(xdr, &res->seq_res, rqstp);
5058         if (status)
5059                 goto out;
5060         status = decode_putfh(xdr);
5061         if (status != 0)
5062                 goto out;
5063         status = decode_access(xdr, res);
5064         if (status != 0)
5065                 goto out;
5066         decode_getfattr(xdr, res->fattr, res->server,
5067                         !RPC_IS_ASYNC(rqstp->rq_task));
5068 out:
5069         return status;
5070 }
5071
5072 /*
5073  * Decode LOOKUP response
5074  */
5075 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5076                                struct nfs4_lookup_res *res)
5077 {
5078         struct compound_hdr hdr;
5079         int status;
5080
5081         status = decode_compound_hdr(xdr, &hdr);
5082         if (status)
5083                 goto out;
5084         status = decode_sequence(xdr, &res->seq_res, rqstp);
5085         if (status)
5086                 goto out;
5087         status = decode_putfh(xdr);
5088         if (status)
5089                 goto out;
5090         status = decode_lookup(xdr);
5091         if (status)
5092                 goto out;
5093         status = decode_getfh(xdr, res->fh);
5094         if (status)
5095                 goto out;
5096         status = decode_getfattr(xdr, res->fattr, res->server
5097                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5098 out:
5099         return status;
5100 }
5101
5102 /*
5103  * Decode LOOKUP_ROOT response
5104  */
5105 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5106                                     struct xdr_stream *xdr,
5107                                     struct nfs4_lookup_res *res)
5108 {
5109         struct compound_hdr hdr;
5110         int status;
5111
5112         status = decode_compound_hdr(xdr, &hdr);
5113         if (status)
5114                 goto out;
5115         status = decode_sequence(xdr, &res->seq_res, rqstp);
5116         if (status)
5117                 goto out;
5118         status = decode_putrootfh(xdr);
5119         if (status)
5120                 goto out;
5121         status = decode_getfh(xdr, res->fh);
5122         if (status == 0)
5123                 status = decode_getfattr(xdr, res->fattr, res->server,
5124                                 !RPC_IS_ASYNC(rqstp->rq_task));
5125 out:
5126         return status;
5127 }
5128
5129 /*
5130  * Decode REMOVE response
5131  */
5132 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5133                                struct nfs_removeres *res)
5134 {
5135         struct compound_hdr hdr;
5136         int status;
5137
5138         status = decode_compound_hdr(xdr, &hdr);
5139         if (status)
5140                 goto out;
5141         status = decode_sequence(xdr, &res->seq_res, rqstp);
5142         if (status)
5143                 goto out;
5144         status = decode_putfh(xdr);
5145         if (status)
5146                 goto out;
5147         status = decode_remove(xdr, &res->cinfo);
5148         if (status)
5149                 goto out;
5150         decode_getfattr(xdr, res->dir_attr, res->server,
5151                         !RPC_IS_ASYNC(rqstp->rq_task));
5152 out:
5153         return status;
5154 }
5155
5156 /*
5157  * Decode RENAME response
5158  */
5159 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5160                                struct nfs_renameres *res)
5161 {
5162         struct compound_hdr hdr;
5163         int status;
5164
5165         status = decode_compound_hdr(xdr, &hdr);
5166         if (status)
5167                 goto out;
5168         status = decode_sequence(xdr, &res->seq_res, rqstp);
5169         if (status)
5170                 goto out;
5171         status = decode_putfh(xdr);
5172         if (status)
5173                 goto out;
5174         status = decode_savefh(xdr);
5175         if (status)
5176                 goto out;
5177         status = decode_putfh(xdr);
5178         if (status)
5179                 goto out;
5180         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5181         if (status)
5182                 goto out;
5183         /* Current FH is target directory */
5184         if (decode_getfattr(xdr, res->new_fattr, res->server,
5185                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5186                 goto out;
5187         status = decode_restorefh(xdr);
5188         if (status)
5189                 goto out;
5190         decode_getfattr(xdr, res->old_fattr, res->server,
5191                         !RPC_IS_ASYNC(rqstp->rq_task));
5192 out:
5193         return status;
5194 }
5195
5196 /*
5197  * Decode LINK response
5198  */
5199 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5200                              struct nfs4_link_res *res)
5201 {
5202         struct compound_hdr hdr;
5203         int status;
5204
5205         status = decode_compound_hdr(xdr, &hdr);
5206         if (status)
5207                 goto out;
5208         status = decode_sequence(xdr, &res->seq_res, rqstp);
5209         if (status)
5210                 goto out;
5211         status = decode_putfh(xdr);
5212         if (status)
5213                 goto out;
5214         status = decode_savefh(xdr);
5215         if (status)
5216                 goto out;
5217         status = decode_putfh(xdr);
5218         if (status)
5219                 goto out;
5220         status = decode_link(xdr, &res->cinfo);
5221         if (status)
5222                 goto out;
5223         /*
5224          * Note order: OP_LINK leaves the directory as the current
5225          *             filehandle.
5226          */
5227         if (decode_getfattr(xdr, res->dir_attr, res->server,
5228                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5229                 goto out;
5230         status = decode_restorefh(xdr);
5231         if (status)
5232                 goto out;
5233         decode_getfattr(xdr, res->fattr, res->server,
5234                         !RPC_IS_ASYNC(rqstp->rq_task));
5235 out:
5236         return status;
5237 }
5238
5239 /*
5240  * Decode CREATE response
5241  */
5242 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5243                                struct nfs4_create_res *res)
5244 {
5245         struct compound_hdr hdr;
5246         int status;
5247
5248         status = decode_compound_hdr(xdr, &hdr);
5249         if (status)
5250                 goto out;
5251         status = decode_sequence(xdr, &res->seq_res, rqstp);
5252         if (status)
5253                 goto out;
5254         status = decode_putfh(xdr);
5255         if (status)
5256                 goto out;
5257         status = decode_savefh(xdr);
5258         if (status)
5259                 goto out;
5260         status = decode_create(xdr, &res->dir_cinfo);
5261         if (status)
5262                 goto out;
5263         status = decode_getfh(xdr, res->fh);
5264         if (status)
5265                 goto out;
5266         if (decode_getfattr(xdr, res->fattr, res->server,
5267                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5268                 goto out;
5269         status = decode_restorefh(xdr);
5270         if (status)
5271                 goto out;
5272         decode_getfattr(xdr, res->dir_fattr, res->server,
5273                         !RPC_IS_ASYNC(rqstp->rq_task));
5274 out:
5275         return status;
5276 }
5277
5278 /*
5279  * Decode SYMLINK response
5280  */
5281 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5282                                 struct nfs4_create_res *res)
5283 {
5284         return nfs4_xdr_dec_create(rqstp, xdr, res);
5285 }
5286
5287 /*
5288  * Decode GETATTR response
5289  */
5290 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5291                                 struct nfs4_getattr_res *res)
5292 {
5293         struct compound_hdr hdr;
5294         int status;
5295
5296         status = decode_compound_hdr(xdr, &hdr);
5297         if (status)
5298                 goto out;
5299         status = decode_sequence(xdr, &res->seq_res, rqstp);
5300         if (status)
5301                 goto out;
5302         status = decode_putfh(xdr);
5303         if (status)
5304                 goto out;
5305         status = decode_getfattr(xdr, res->fattr, res->server,
5306                         !RPC_IS_ASYNC(rqstp->rq_task));
5307 out:
5308         return status;
5309 }
5310
5311 /*
5312  * Encode an SETACL request
5313  */
5314 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5315                                 struct nfs_setaclargs *args)
5316 {
5317         struct compound_hdr hdr = {
5318                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5319         };
5320
5321         encode_compound_hdr(xdr, req, &hdr);
5322         encode_sequence(xdr, &args->seq_args, &hdr);
5323         encode_putfh(xdr, args->fh, &hdr);
5324         encode_setacl(xdr, args, &hdr);
5325         encode_nops(&hdr);
5326 }
5327
5328 /*
5329  * Decode SETACL response
5330  */
5331 static int
5332 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5333                     struct nfs_setaclres *res)
5334 {
5335         struct compound_hdr hdr;
5336         int status;
5337
5338         status = decode_compound_hdr(xdr, &hdr);
5339         if (status)
5340                 goto out;
5341         status = decode_sequence(xdr, &res->seq_res, rqstp);
5342         if (status)
5343                 goto out;
5344         status = decode_putfh(xdr);
5345         if (status)
5346                 goto out;
5347         status = decode_setattr(xdr);
5348 out:
5349         return status;
5350 }
5351
5352 /*
5353  * Decode GETACL response
5354  */
5355 static int
5356 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5357                     struct nfs_getaclres *res)
5358 {
5359         struct compound_hdr hdr;
5360         int status;
5361
5362         status = decode_compound_hdr(xdr, &hdr);
5363         if (status)
5364                 goto out;
5365         status = decode_sequence(xdr, &res->seq_res, rqstp);
5366         if (status)
5367                 goto out;
5368         status = decode_putfh(xdr);
5369         if (status)
5370                 goto out;
5371         status = decode_getacl(xdr, rqstp, &res->acl_len);
5372
5373 out:
5374         return status;
5375 }
5376
5377 /*
5378  * Decode CLOSE response
5379  */
5380 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5381                               struct nfs_closeres *res)
5382 {
5383         struct compound_hdr hdr;
5384         int status;
5385
5386         status = decode_compound_hdr(xdr, &hdr);
5387         if (status)
5388                 goto out;
5389         status = decode_sequence(xdr, &res->seq_res, rqstp);
5390         if (status)
5391                 goto out;
5392         status = decode_putfh(xdr);
5393         if (status)
5394                 goto out;
5395         status = decode_close(xdr, res);
5396         if (status != 0)
5397                 goto out;
5398         /*
5399          * Note: Server may do delete on close for this file
5400          *      in which case the getattr call will fail with
5401          *      an ESTALE error. Shouldn't be a problem,
5402          *      though, since fattr->valid will remain unset.
5403          */
5404         decode_getfattr(xdr, res->fattr, res->server,
5405                         !RPC_IS_ASYNC(rqstp->rq_task));
5406 out:
5407         return status;
5408 }
5409
5410 /*
5411  * Decode OPEN response
5412  */
5413 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5414                              struct nfs_openres *res)
5415 {
5416         struct compound_hdr hdr;
5417         int status;
5418
5419         status = decode_compound_hdr(xdr, &hdr);
5420         if (status)
5421                 goto out;
5422         status = decode_sequence(xdr, &res->seq_res, rqstp);
5423         if (status)
5424                 goto out;
5425         status = decode_putfh(xdr);
5426         if (status)
5427                 goto out;
5428         status = decode_savefh(xdr);
5429         if (status)
5430                 goto out;
5431         status = decode_open(xdr, res);
5432         if (status)
5433                 goto out;
5434         if (decode_getfh(xdr, &res->fh) != 0)
5435                 goto out;
5436         if (decode_getfattr(xdr, res->f_attr, res->server,
5437                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5438                 goto out;
5439         if (decode_restorefh(xdr) != 0)
5440                 goto out;
5441         decode_getfattr(xdr, res->dir_attr, res->server,
5442                         !RPC_IS_ASYNC(rqstp->rq_task));
5443 out:
5444         return status;
5445 }
5446
5447 /*
5448  * Decode OPEN_CONFIRM response
5449  */
5450 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5451                                      struct xdr_stream *xdr,
5452                                      struct nfs_open_confirmres *res)
5453 {
5454         struct compound_hdr hdr;
5455         int status;
5456
5457         status = decode_compound_hdr(xdr, &hdr);
5458         if (status)
5459                 goto out;
5460         status = decode_putfh(xdr);
5461         if (status)
5462                 goto out;
5463         status = decode_open_confirm(xdr, res);
5464 out:
5465         return status;
5466 }
5467
5468 /*
5469  * Decode OPEN response
5470  */
5471 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5472                                     struct xdr_stream *xdr,
5473                                     struct nfs_openres *res)
5474 {
5475         struct compound_hdr hdr;
5476         int status;
5477
5478         status = decode_compound_hdr(xdr, &hdr);
5479         if (status)
5480                 goto out;
5481         status = decode_sequence(xdr, &res->seq_res, rqstp);
5482         if (status)
5483                 goto out;
5484         status = decode_putfh(xdr);
5485         if (status)
5486                 goto out;
5487         status = decode_open(xdr, res);
5488         if (status)
5489                 goto out;
5490         decode_getfattr(xdr, res->f_attr, res->server,
5491                         !RPC_IS_ASYNC(rqstp->rq_task));
5492 out:
5493         return status;
5494 }
5495
5496 /*
5497  * Decode SETATTR response
5498  */
5499 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5500                                 struct xdr_stream *xdr,
5501                                 struct nfs_setattrres *res)
5502 {
5503         struct compound_hdr hdr;
5504         int status;
5505
5506         status = decode_compound_hdr(xdr, &hdr);
5507         if (status)
5508                 goto out;
5509         status = decode_sequence(xdr, &res->seq_res, rqstp);
5510         if (status)
5511                 goto out;
5512         status = decode_putfh(xdr);
5513         if (status)
5514                 goto out;
5515         status = decode_setattr(xdr);
5516         if (status)
5517                 goto out;
5518         decode_getfattr(xdr, res->fattr, res->server,
5519                         !RPC_IS_ASYNC(rqstp->rq_task));
5520 out:
5521         return status;
5522 }
5523
5524 /*
5525  * Decode LOCK response
5526  */
5527 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5528                              struct nfs_lock_res *res)
5529 {
5530         struct compound_hdr hdr;
5531         int status;
5532
5533         status = decode_compound_hdr(xdr, &hdr);
5534         if (status)
5535                 goto out;
5536         status = decode_sequence(xdr, &res->seq_res, rqstp);
5537         if (status)
5538                 goto out;
5539         status = decode_putfh(xdr);
5540         if (status)
5541                 goto out;
5542         status = decode_lock(xdr, res);
5543 out:
5544         return status;
5545 }
5546
5547 /*
5548  * Decode LOCKT response
5549  */
5550 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5551                               struct nfs_lockt_res *res)
5552 {
5553         struct compound_hdr hdr;
5554         int status;
5555
5556         status = decode_compound_hdr(xdr, &hdr);
5557         if (status)
5558                 goto out;
5559         status = decode_sequence(xdr, &res->seq_res, rqstp);
5560         if (status)
5561                 goto out;
5562         status = decode_putfh(xdr);
5563         if (status)
5564                 goto out;
5565         status = decode_lockt(xdr, res);
5566 out:
5567         return status;
5568 }
5569
5570 /*
5571  * Decode LOCKU response
5572  */
5573 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5574                               struct nfs_locku_res *res)
5575 {
5576         struct compound_hdr hdr;
5577         int status;
5578
5579         status = decode_compound_hdr(xdr, &hdr);
5580         if (status)
5581                 goto out;
5582         status = decode_sequence(xdr, &res->seq_res, rqstp);
5583         if (status)
5584                 goto out;
5585         status = decode_putfh(xdr);
5586         if (status)
5587                 goto out;
5588         status = decode_locku(xdr, res);
5589 out:
5590         return status;
5591 }
5592
5593 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5594                                           struct xdr_stream *xdr, void *dummy)
5595 {
5596         struct compound_hdr hdr;
5597         int status;
5598
5599         status = decode_compound_hdr(xdr, &hdr);
5600         if (!status)
5601                 status = decode_release_lockowner(xdr);
5602         return status;
5603 }
5604
5605 /*
5606  * Decode READLINK response
5607  */
5608 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5609                                  struct xdr_stream *xdr,
5610                                  struct nfs4_readlink_res *res)
5611 {
5612         struct compound_hdr hdr;
5613         int status;
5614
5615         status = decode_compound_hdr(xdr, &hdr);
5616         if (status)
5617                 goto out;
5618         status = decode_sequence(xdr, &res->seq_res, rqstp);
5619         if (status)
5620                 goto out;
5621         status = decode_putfh(xdr);
5622         if (status)
5623                 goto out;
5624         status = decode_readlink(xdr, rqstp);
5625 out:
5626         return status;
5627 }
5628
5629 /*
5630  * Decode READDIR response
5631  */
5632 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5633                                 struct nfs4_readdir_res *res)
5634 {
5635         struct compound_hdr hdr;
5636         int status;
5637
5638         status = decode_compound_hdr(xdr, &hdr);
5639         if (status)
5640                 goto out;
5641         status = decode_sequence(xdr, &res->seq_res, rqstp);
5642         if (status)
5643                 goto out;
5644         status = decode_putfh(xdr);
5645         if (status)
5646                 goto out;
5647         status = decode_readdir(xdr, rqstp, res);
5648 out:
5649         return status;
5650 }
5651
5652 /*
5653  * Decode Read response
5654  */
5655 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5656                              struct nfs_readres *res)
5657 {
5658         struct compound_hdr hdr;
5659         int status;
5660
5661         status = decode_compound_hdr(xdr, &hdr);
5662         if (status)
5663                 goto out;
5664         status = decode_sequence(xdr, &res->seq_res, rqstp);
5665         if (status)
5666                 goto out;
5667         status = decode_putfh(xdr);
5668         if (status)
5669                 goto out;
5670         status = decode_read(xdr, rqstp, res);
5671         if (!status)
5672                 status = res->count;
5673 out:
5674         return status;
5675 }
5676
5677 /*
5678  * Decode WRITE response
5679  */
5680 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5681                               struct nfs_writeres *res)
5682 {
5683         struct compound_hdr hdr;
5684         int status;
5685
5686         status = decode_compound_hdr(xdr, &hdr);
5687         if (status)
5688                 goto out;
5689         status = decode_sequence(xdr, &res->seq_res, rqstp);
5690         if (status)
5691                 goto out;
5692         status = decode_putfh(xdr);
5693         if (status)
5694                 goto out;
5695         status = decode_write(xdr, res);
5696         if (status)
5697                 goto out;
5698         if (res->fattr)
5699                 decode_getfattr(xdr, res->fattr, res->server,
5700                                 !RPC_IS_ASYNC(rqstp->rq_task));
5701         if (!status)
5702                 status = res->count;
5703 out:
5704         return status;
5705 }
5706
5707 /*
5708  * Decode COMMIT response
5709  */
5710 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5711                                struct nfs_writeres *res)
5712 {
5713         struct compound_hdr hdr;
5714         int status;
5715
5716         status = decode_compound_hdr(xdr, &hdr);
5717         if (status)
5718                 goto out;
5719         status = decode_sequence(xdr, &res->seq_res, rqstp);
5720         if (status)
5721                 goto out;
5722         status = decode_putfh(xdr);
5723         if (status)
5724                 goto out;
5725         status = decode_commit(xdr, res);
5726         if (status)
5727                 goto out;
5728         decode_getfattr(xdr, res->fattr, res->server,
5729                         !RPC_IS_ASYNC(rqstp->rq_task));
5730 out:
5731         return status;
5732 }
5733
5734 /*
5735  * Decode FSINFO response
5736  */
5737 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5738                                struct nfs4_fsinfo_res *res)
5739 {
5740         struct compound_hdr hdr;
5741         int status;
5742
5743         status = decode_compound_hdr(xdr, &hdr);
5744         if (!status)
5745                 status = decode_sequence(xdr, &res->seq_res, req);
5746         if (!status)
5747                 status = decode_putfh(xdr);
5748         if (!status)
5749                 status = decode_fsinfo(xdr, res->fsinfo);
5750         return status;
5751 }
5752
5753 /*
5754  * Decode PATHCONF response
5755  */
5756 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5757                                  struct nfs4_pathconf_res *res)
5758 {
5759         struct compound_hdr hdr;
5760         int status;
5761
5762         status = decode_compound_hdr(xdr, &hdr);
5763         if (!status)
5764                 status = decode_sequence(xdr, &res->seq_res, req);
5765         if (!status)
5766                 status = decode_putfh(xdr);
5767         if (!status)
5768                 status = decode_pathconf(xdr, res->pathconf);
5769         return status;
5770 }
5771
5772 /*
5773  * Decode STATFS response
5774  */
5775 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5776                                struct nfs4_statfs_res *res)
5777 {
5778         struct compound_hdr hdr;
5779         int status;
5780
5781         status = decode_compound_hdr(xdr, &hdr);
5782         if (!status)
5783                 status = decode_sequence(xdr, &res->seq_res, req);
5784         if (!status)
5785                 status = decode_putfh(xdr);
5786         if (!status)
5787                 status = decode_statfs(xdr, res->fsstat);
5788         return status;
5789 }
5790
5791 /*
5792  * Decode GETATTR_BITMAP response
5793  */
5794 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5795                                     struct xdr_stream *xdr,
5796                                     struct nfs4_server_caps_res *res)
5797 {
5798         struct compound_hdr hdr;
5799         int status;
5800
5801         status = decode_compound_hdr(xdr, &hdr);
5802         if (status)
5803                 goto out;
5804         status = decode_sequence(xdr, &res->seq_res, req);
5805         if (status)
5806                 goto out;
5807         status = decode_putfh(xdr);
5808         if (status)
5809                 goto out;
5810         status = decode_server_caps(xdr, res);
5811 out:
5812         return status;
5813 }
5814
5815 /*
5816  * Decode RENEW response
5817  */
5818 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5819                               void *__unused)
5820 {
5821         struct compound_hdr hdr;
5822         int status;
5823
5824         status = decode_compound_hdr(xdr, &hdr);
5825         if (!status)
5826                 status = decode_renew(xdr);
5827         return status;
5828 }
5829
5830 /*
5831  * Decode SETCLIENTID response
5832  */
5833 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5834                                     struct xdr_stream *xdr,
5835                                     struct nfs4_setclientid_res *res)
5836 {
5837         struct compound_hdr hdr;
5838         int status;
5839
5840         status = decode_compound_hdr(xdr, &hdr);
5841         if (!status)
5842                 status = decode_setclientid(xdr, res);
5843         return status;
5844 }
5845
5846 /*
5847  * Decode SETCLIENTID_CONFIRM response
5848  */
5849 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5850                                             struct xdr_stream *xdr,
5851                                             struct nfs_fsinfo *fsinfo)
5852 {
5853         struct compound_hdr hdr;
5854         int status;
5855
5856         status = decode_compound_hdr(xdr, &hdr);
5857         if (!status)
5858                 status = decode_setclientid_confirm(xdr);
5859         if (!status)
5860                 status = decode_putrootfh(xdr);
5861         if (!status)
5862                 status = decode_fsinfo(xdr, fsinfo);
5863         return status;
5864 }
5865
5866 /*
5867  * Decode DELEGRETURN response
5868  */
5869 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5870                                     struct xdr_stream *xdr,
5871                                     struct nfs4_delegreturnres *res)
5872 {
5873         struct compound_hdr hdr;
5874         int status;
5875
5876         status = decode_compound_hdr(xdr, &hdr);
5877         if (status)
5878                 goto out;
5879         status = decode_sequence(xdr, &res->seq_res, rqstp);
5880         if (status)
5881                 goto out;
5882         status = decode_putfh(xdr);
5883         if (status != 0)
5884                 goto out;
5885         status = decode_delegreturn(xdr);
5886         if (status != 0)
5887                 goto out;
5888         decode_getfattr(xdr, res->fattr, res->server,
5889                         !RPC_IS_ASYNC(rqstp->rq_task));
5890 out:
5891         return status;
5892 }
5893
5894 /*
5895  * Decode FS_LOCATIONS response
5896  */
5897 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
5898                                      struct xdr_stream *xdr,
5899                                      struct nfs4_fs_locations_res *res)
5900 {
5901         struct compound_hdr hdr;
5902         int status;
5903
5904         status = decode_compound_hdr(xdr, &hdr);
5905         if (status)
5906                 goto out;
5907         status = decode_sequence(xdr, &res->seq_res, req);
5908         if (status)
5909                 goto out;
5910         status = decode_putfh(xdr);
5911         if (status)
5912                 goto out;
5913         status = decode_lookup(xdr);
5914         if (status)
5915                 goto out;
5916         xdr_enter_page(xdr, PAGE_SIZE);
5917         status = decode_getfattr(xdr, &res->fs_locations->fattr,
5918                                  res->fs_locations->server,
5919                                  !RPC_IS_ASYNC(req->rq_task));
5920 out:
5921         return status;
5922 }
5923
5924 #if defined(CONFIG_NFS_V4_1)
5925 /*
5926  * Decode EXCHANGE_ID response
5927  */
5928 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
5929                                     struct xdr_stream *xdr,
5930                                     void *res)
5931 {
5932         struct compound_hdr hdr;
5933         int status;
5934
5935         status = decode_compound_hdr(xdr, &hdr);
5936         if (!status)
5937                 status = decode_exchange_id(xdr, res);
5938         return status;
5939 }
5940
5941 /*
5942  * Decode CREATE_SESSION response
5943  */
5944 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
5945                                        struct xdr_stream *xdr,
5946                                        struct nfs41_create_session_res *res)
5947 {
5948         struct compound_hdr hdr;
5949         int status;
5950
5951         status = decode_compound_hdr(xdr, &hdr);
5952         if (!status)
5953                 status = decode_create_session(xdr, res);
5954         return status;
5955 }
5956
5957 /*
5958  * Decode DESTROY_SESSION response
5959  */
5960 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
5961                                         struct xdr_stream *xdr,
5962                                         void *res)
5963 {
5964         struct compound_hdr hdr;
5965         int status;
5966
5967         status = decode_compound_hdr(xdr, &hdr);
5968         if (!status)
5969                 status = decode_destroy_session(xdr, res);
5970         return status;
5971 }
5972
5973 /*
5974  * Decode SEQUENCE response
5975  */
5976 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
5977                                  struct xdr_stream *xdr,
5978                                  struct nfs4_sequence_res *res)
5979 {
5980         struct compound_hdr hdr;
5981         int status;
5982
5983         status = decode_compound_hdr(xdr, &hdr);
5984         if (!status)
5985                 status = decode_sequence(xdr, res, rqstp);
5986         return status;
5987 }
5988
5989 /*
5990  * Decode GET_LEASE_TIME response
5991  */
5992 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
5993                                        struct xdr_stream *xdr,
5994                                        struct nfs4_get_lease_time_res *res)
5995 {
5996         struct compound_hdr hdr;
5997         int status;
5998
5999         status = decode_compound_hdr(xdr, &hdr);
6000         if (!status)
6001                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6002         if (!status)
6003                 status = decode_putrootfh(xdr);
6004         if (!status)
6005                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6006         return status;
6007 }
6008
6009 /*
6010  * Decode RECLAIM_COMPLETE response
6011  */
6012 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6013                                          struct xdr_stream *xdr,
6014                                          struct nfs41_reclaim_complete_res *res)
6015 {
6016         struct compound_hdr hdr;
6017         int status;
6018
6019         status = decode_compound_hdr(xdr, &hdr);
6020         if (!status)
6021                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6022         if (!status)
6023                 status = decode_reclaim_complete(xdr, (void *)NULL);
6024         return status;
6025 }
6026
6027 /*
6028  * Decode GETDEVINFO response
6029  */
6030 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6031                                       struct xdr_stream *xdr,
6032                                       struct nfs4_getdeviceinfo_res *res)
6033 {
6034         struct compound_hdr hdr;
6035         int status;
6036
6037         status = decode_compound_hdr(xdr, &hdr);
6038         if (status != 0)
6039                 goto out;
6040         status = decode_sequence(xdr, &res->seq_res, rqstp);
6041         if (status != 0)
6042                 goto out;
6043         status = decode_getdeviceinfo(xdr, res->pdev);
6044 out:
6045         return status;
6046 }
6047
6048 /*
6049  * Decode LAYOUTGET response
6050  */
6051 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6052                                   struct xdr_stream *xdr,
6053                                   struct nfs4_layoutget_res *res)
6054 {
6055         struct compound_hdr hdr;
6056         int status;
6057
6058         status = decode_compound_hdr(xdr, &hdr);
6059         if (status)
6060                 goto out;
6061         status = decode_sequence(xdr, &res->seq_res, rqstp);
6062         if (status)
6063                 goto out;
6064         status = decode_putfh(xdr);
6065         if (status)
6066                 goto out;
6067         status = decode_layoutget(xdr, rqstp, res);
6068 out:
6069         return status;
6070 }
6071 #endif /* CONFIG_NFS_V4_1 */
6072
6073 /**
6074  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6075  *                      the local page cache.
6076  * @xdr: XDR stream where entry resides
6077  * @entry: buffer to fill in with entry data
6078  * @plus: boolean indicating whether this should be a readdirplus entry
6079  *
6080  * Returns zero if successful, otherwise a negative errno value is
6081  * returned.
6082  *
6083  * This function is not invoked during READDIR reply decoding, but
6084  * rather whenever an application invokes the getdents(2) system call
6085  * on a directory already in our cache.
6086  */
6087 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6088                        int plus)
6089 {
6090         uint32_t bitmap[2] = {0};
6091         uint32_t len;
6092         __be32 *p = xdr_inline_decode(xdr, 4);
6093         if (unlikely(!p))
6094                 goto out_overflow;
6095         if (*p == xdr_zero) {
6096                 p = xdr_inline_decode(xdr, 4);
6097                 if (unlikely(!p))
6098                         goto out_overflow;
6099                 if (*p == xdr_zero)
6100                         return -EAGAIN;
6101                 entry->eof = 1;
6102                 return -EBADCOOKIE;
6103         }
6104
6105         p = xdr_inline_decode(xdr, 12);
6106         if (unlikely(!p))
6107                 goto out_overflow;
6108         entry->prev_cookie = entry->cookie;
6109         p = xdr_decode_hyper(p, &entry->cookie);
6110         entry->len = be32_to_cpup(p);
6111
6112         p = xdr_inline_decode(xdr, entry->len);
6113         if (unlikely(!p))
6114                 goto out_overflow;
6115         entry->name = (const char *) p;
6116
6117         /*
6118          * In case the server doesn't return an inode number,
6119          * we fake one here.  (We don't use inode number 0,
6120          * since glibc seems to choke on it...)
6121          */
6122         entry->ino = 1;
6123         entry->fattr->valid = 0;
6124
6125         if (decode_attr_bitmap(xdr, bitmap) < 0)
6126                 goto out_overflow;
6127
6128         if (decode_attr_length(xdr, &len, &p) < 0)
6129                 goto out_overflow;
6130
6131         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6132                                         entry->server, 1) < 0)
6133                 goto out_overflow;
6134         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6135                 entry->ino = entry->fattr->fileid;
6136
6137         entry->d_type = DT_UNKNOWN;
6138         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6139                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6140
6141         return 0;
6142
6143 out_overflow:
6144         print_overflow_msg(__func__, xdr);
6145         return -EAGAIN;
6146 }
6147
6148 /*
6149  * We need to translate between nfs status return values and
6150  * the local errno values which may not be the same.
6151  */
6152 static struct {
6153         int stat;
6154         int errno;
6155 } nfs_errtbl[] = {
6156         { NFS4_OK,              0               },
6157         { NFS4ERR_PERM,         -EPERM          },
6158         { NFS4ERR_NOENT,        -ENOENT         },
6159         { NFS4ERR_IO,           -errno_NFSERR_IO},
6160         { NFS4ERR_NXIO,         -ENXIO          },
6161         { NFS4ERR_ACCESS,       -EACCES         },
6162         { NFS4ERR_EXIST,        -EEXIST         },
6163         { NFS4ERR_XDEV,         -EXDEV          },
6164         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6165         { NFS4ERR_ISDIR,        -EISDIR         },
6166         { NFS4ERR_INVAL,        -EINVAL         },
6167         { NFS4ERR_FBIG,         -EFBIG          },
6168         { NFS4ERR_NOSPC,        -ENOSPC         },
6169         { NFS4ERR_ROFS,         -EROFS          },
6170         { NFS4ERR_MLINK,        -EMLINK         },
6171         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6172         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6173         { NFS4ERR_DQUOT,        -EDQUOT         },
6174         { NFS4ERR_STALE,        -ESTALE         },
6175         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6176         { NFS4ERR_BADOWNER,     -EINVAL         },
6177         { NFS4ERR_BADNAME,      -EINVAL         },
6178         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6179         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6180         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6181         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6182         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6183         { NFS4ERR_LOCKED,       -EAGAIN         },
6184         { NFS4ERR_SYMLINK,      -ELOOP          },
6185         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6186         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6187         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
6188                                                     * to be handled by a
6189                                                     * middle-layer.
6190                                                     */
6191         { -1,                   -EIO            }
6192 };
6193
6194 /*
6195  * Convert an NFS error code to a local one.
6196  * This one is used jointly by NFSv2 and NFSv3.
6197  */
6198 static int
6199 nfs4_stat_to_errno(int stat)
6200 {
6201         int i;
6202         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6203                 if (nfs_errtbl[i].stat == stat)
6204                         return nfs_errtbl[i].errno;
6205         }
6206         if (stat <= 10000 || stat > 10100) {
6207                 /* The server is looney tunes. */
6208                 return -EREMOTEIO;
6209         }
6210         /* If we cannot translate the error, the recovery routines should
6211          * handle it.
6212          * Note: remaining NFSv4 error codes have values > 10000, so should
6213          * not conflict with native Linux error codes.
6214          */
6215         return -stat;
6216 }
6217
6218 #define PROC(proc, argtype, restype)                            \
6219 [NFSPROC4_CLNT_##proc] = {                                      \
6220         .p_proc   = NFSPROC4_COMPOUND,                          \
6221         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6222         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6223         .p_arglen = NFS4_##argtype##_sz,                        \
6224         .p_replen = NFS4_##restype##_sz,                        \
6225         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6226         .p_name   = #proc,                                      \
6227 }
6228
6229 struct rpc_procinfo     nfs4_procedures[] = {
6230         PROC(READ,              enc_read,               dec_read),
6231         PROC(WRITE,             enc_write,              dec_write),
6232         PROC(COMMIT,            enc_commit,             dec_commit),
6233         PROC(OPEN,              enc_open,               dec_open),
6234         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6235         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6236         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6237         PROC(CLOSE,             enc_close,              dec_close),
6238         PROC(SETATTR,           enc_setattr,            dec_setattr),
6239         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6240         PROC(RENEW,             enc_renew,              dec_renew),
6241         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6242         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6243         PROC(LOCK,              enc_lock,               dec_lock),
6244         PROC(LOCKT,             enc_lockt,              dec_lockt),
6245         PROC(LOCKU,             enc_locku,              dec_locku),
6246         PROC(ACCESS,            enc_access,             dec_access),
6247         PROC(GETATTR,           enc_getattr,            dec_getattr),
6248         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6249         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6250         PROC(REMOVE,            enc_remove,             dec_remove),
6251         PROC(RENAME,            enc_rename,             dec_rename),
6252         PROC(LINK,              enc_link,               dec_link),
6253         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6254         PROC(CREATE,            enc_create,             dec_create),
6255         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6256         PROC(STATFS,            enc_statfs,             dec_statfs),
6257         PROC(READLINK,          enc_readlink,           dec_readlink),
6258         PROC(READDIR,           enc_readdir,            dec_readdir),
6259         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6260         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6261         PROC(GETACL,            enc_getacl,             dec_getacl),
6262         PROC(SETACL,            enc_setacl,             dec_setacl),
6263         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6264         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6265 #if defined(CONFIG_NFS_V4_1)
6266         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6267         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6268         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6269         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6270         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6271         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6272         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6273         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6274 #endif /* CONFIG_NFS_V4_1 */
6275 };
6276
6277 struct rpc_version              nfs_version4 = {
6278         .number                 = 4,
6279         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6280         .procs                  = nfs4_procedures
6281 };
6282
6283 /*
6284  * Local variables:
6285  *  c-basic-offset: 8
6286  * End:
6287  */