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)
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                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1396         } else
1397                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1398 }
1399
1400 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1401 {
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 4);
1405         *p = cpu_to_be32(OP_READ);
1406
1407         encode_stateid(xdr, args->context, args->lock_context);
1408
1409         p = reserve_space(xdr, 12);
1410         p = xdr_encode_hyper(p, args->offset);
1411         *p = cpu_to_be32(args->count);
1412         hdr->nops++;
1413         hdr->replen += decode_read_maxsz;
1414 }
1415
1416 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1417 {
1418         uint32_t attrs[2] = {0, 0};
1419         uint32_t dircount = readdir->count >> 1;
1420         __be32 *p;
1421
1422         if (readdir->plus) {
1423                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1424                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1425                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1426                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1427                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1428                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1429                 dircount >>= 1;
1430         }
1431         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1432         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1433         /* Switch to mounted_on_fileid if the server supports it */
1434         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1435                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1436         else
1437                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1438
1439         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1440         *p++ = cpu_to_be32(OP_READDIR);
1441         p = xdr_encode_hyper(p, readdir->cookie);
1442         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1443         *p++ = cpu_to_be32(dircount);
1444         *p++ = cpu_to_be32(readdir->count);
1445         *p++ = cpu_to_be32(2);
1446
1447         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1448         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1449         hdr->nops++;
1450         hdr->replen += decode_readdir_maxsz;
1451         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1452                         __func__,
1453                         (unsigned long long)readdir->cookie,
1454                         ((u32 *)readdir->verifier.data)[0],
1455                         ((u32 *)readdir->verifier.data)[1],
1456                         attrs[0] & readdir->bitmask[0],
1457                         attrs[1] & readdir->bitmask[1]);
1458 }
1459
1460 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1461 {
1462         __be32 *p;
1463
1464         p = reserve_space(xdr, 4);
1465         *p = cpu_to_be32(OP_READLINK);
1466         hdr->nops++;
1467         hdr->replen += decode_readlink_maxsz;
1468 }
1469
1470 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1471 {
1472         __be32 *p;
1473
1474         p = reserve_space(xdr, 8 + name->len);
1475         *p++ = cpu_to_be32(OP_REMOVE);
1476         xdr_encode_opaque(p, name->name, name->len);
1477         hdr->nops++;
1478         hdr->replen += decode_remove_maxsz;
1479 }
1480
1481 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1482 {
1483         __be32 *p;
1484
1485         p = reserve_space(xdr, 4);
1486         *p = cpu_to_be32(OP_RENAME);
1487         encode_string(xdr, oldname->len, oldname->name);
1488         encode_string(xdr, newname->len, newname->name);
1489         hdr->nops++;
1490         hdr->replen += decode_rename_maxsz;
1491 }
1492
1493 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1494 {
1495         __be32 *p;
1496
1497         p = reserve_space(xdr, 12);
1498         *p++ = cpu_to_be32(OP_RENEW);
1499         xdr_encode_hyper(p, client_stateid->cl_clientid);
1500         hdr->nops++;
1501         hdr->replen += decode_renew_maxsz;
1502 }
1503
1504 static void
1505 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1506 {
1507         __be32 *p;
1508
1509         p = reserve_space(xdr, 4);
1510         *p = cpu_to_be32(OP_RESTOREFH);
1511         hdr->nops++;
1512         hdr->replen += decode_restorefh_maxsz;
1513 }
1514
1515 static void
1516 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1517 {
1518         __be32 *p;
1519
1520         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1521         *p++ = cpu_to_be32(OP_SETATTR);
1522         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1523         p = reserve_space(xdr, 2*4);
1524         *p++ = cpu_to_be32(1);
1525         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1526         BUG_ON(arg->acl_len % 4);
1527         p = reserve_space(xdr, 4);
1528         *p = cpu_to_be32(arg->acl_len);
1529         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1530         hdr->nops++;
1531         hdr->replen += decode_setacl_maxsz;
1532 }
1533
1534 static void
1535 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1536 {
1537         __be32 *p;
1538
1539         p = reserve_space(xdr, 4);
1540         *p = cpu_to_be32(OP_SAVEFH);
1541         hdr->nops++;
1542         hdr->replen += decode_savefh_maxsz;
1543 }
1544
1545 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1546 {
1547         __be32 *p;
1548
1549         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1550         *p++ = cpu_to_be32(OP_SETATTR);
1551         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1552         hdr->nops++;
1553         hdr->replen += decode_setattr_maxsz;
1554         encode_attrs(xdr, arg->iap, server);
1555 }
1556
1557 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1558 {
1559         __be32 *p;
1560
1561         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1562         *p++ = cpu_to_be32(OP_SETCLIENTID);
1563         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1564
1565         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1566         p = reserve_space(xdr, 4);
1567         *p = cpu_to_be32(setclientid->sc_prog);
1568         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1569         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1570         p = reserve_space(xdr, 4);
1571         *p = cpu_to_be32(setclientid->sc_cb_ident);
1572         hdr->nops++;
1573         hdr->replen += decode_setclientid_maxsz;
1574 }
1575
1576 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1577 {
1578         __be32 *p;
1579
1580         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1581         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1582         p = xdr_encode_hyper(p, arg->clientid);
1583         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1584         hdr->nops++;
1585         hdr->replen += decode_setclientid_confirm_maxsz;
1586 }
1587
1588 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1589 {
1590         __be32 *p;
1591
1592         p = reserve_space(xdr, 4);
1593         *p = cpu_to_be32(OP_WRITE);
1594
1595         encode_stateid(xdr, args->context, args->lock_context);
1596
1597         p = reserve_space(xdr, 16);
1598         p = xdr_encode_hyper(p, args->offset);
1599         *p++ = cpu_to_be32(args->stable);
1600         *p = cpu_to_be32(args->count);
1601
1602         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1603         hdr->nops++;
1604         hdr->replen += decode_write_maxsz;
1605 }
1606
1607 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1608 {
1609         __be32 *p;
1610
1611         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1612
1613         *p++ = cpu_to_be32(OP_DELEGRETURN);
1614         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1615         hdr->nops++;
1616         hdr->replen += decode_delegreturn_maxsz;
1617 }
1618
1619 #if defined(CONFIG_NFS_V4_1)
1620 /* NFSv4.1 operations */
1621 static void encode_exchange_id(struct xdr_stream *xdr,
1622                                struct nfs41_exchange_id_args *args,
1623                                struct compound_hdr *hdr)
1624 {
1625         __be32 *p;
1626
1627         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1628         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1629         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1630
1631         encode_string(xdr, args->id_len, args->id);
1632
1633         p = reserve_space(xdr, 12);
1634         *p++ = cpu_to_be32(args->flags);
1635         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1636         *p = cpu_to_be32(0);    /* zero length implementation id array */
1637         hdr->nops++;
1638         hdr->replen += decode_exchange_id_maxsz;
1639 }
1640
1641 static void encode_create_session(struct xdr_stream *xdr,
1642                                   struct nfs41_create_session_args *args,
1643                                   struct compound_hdr *hdr)
1644 {
1645         __be32 *p;
1646         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1647         uint32_t len;
1648         struct nfs_client *clp = args->client;
1649         u32 max_resp_sz_cached;
1650
1651         /*
1652          * Assumes OPEN is the biggest non-idempotent compound.
1653          * 2 is the verifier.
1654          */
1655         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1656                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1657
1658         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1659                         clp->cl_ipaddr);
1660
1661         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1662         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1663         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1664         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1665         *p++ = cpu_to_be32(args->flags);                        /*flags */
1666
1667         /* Fore Channel */
1668         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1669         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1670         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1671         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1672         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1673         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1674         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1675
1676         /* Back Channel */
1677         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1678         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1679         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1680         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1681         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1682         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1683         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1684
1685         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1686         *p++ = cpu_to_be32(1);
1687         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1688
1689         /* authsys_parms rfc1831 */
1690         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1691         p = xdr_encode_opaque(p, machine_name, len);
1692         *p++ = cpu_to_be32(0);                          /* UID */
1693         *p++ = cpu_to_be32(0);                          /* GID */
1694         *p = cpu_to_be32(0);                            /* No more gids */
1695         hdr->nops++;
1696         hdr->replen += decode_create_session_maxsz;
1697 }
1698
1699 static void encode_destroy_session(struct xdr_stream *xdr,
1700                                    struct nfs4_session *session,
1701                                    struct compound_hdr *hdr)
1702 {
1703         __be32 *p;
1704         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1705         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1706         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1707         hdr->nops++;
1708         hdr->replen += decode_destroy_session_maxsz;
1709 }
1710
1711 static void encode_reclaim_complete(struct xdr_stream *xdr,
1712                                     struct nfs41_reclaim_complete_args *args,
1713                                     struct compound_hdr *hdr)
1714 {
1715         __be32 *p;
1716
1717         p = reserve_space(xdr, 8);
1718         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1719         *p++ = cpu_to_be32(args->one_fs);
1720         hdr->nops++;
1721         hdr->replen += decode_reclaim_complete_maxsz;
1722 }
1723 #endif /* CONFIG_NFS_V4_1 */
1724
1725 static void encode_sequence(struct xdr_stream *xdr,
1726                             const struct nfs4_sequence_args *args,
1727                             struct compound_hdr *hdr)
1728 {
1729 #if defined(CONFIG_NFS_V4_1)
1730         struct nfs4_session *session = args->sa_session;
1731         struct nfs4_slot_table *tp;
1732         struct nfs4_slot *slot;
1733         __be32 *p;
1734
1735         if (!session)
1736                 return;
1737
1738         tp = &session->fc_slot_table;
1739
1740         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1741         slot = tp->slots + args->sa_slotid;
1742
1743         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1744         *p++ = cpu_to_be32(OP_SEQUENCE);
1745
1746         /*
1747          * Sessionid + seqid + slotid + max slotid + cache_this
1748          */
1749         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1750                 "max_slotid=%d cache_this=%d\n",
1751                 __func__,
1752                 ((u32 *)session->sess_id.data)[0],
1753                 ((u32 *)session->sess_id.data)[1],
1754                 ((u32 *)session->sess_id.data)[2],
1755                 ((u32 *)session->sess_id.data)[3],
1756                 slot->seq_nr, args->sa_slotid,
1757                 tp->highest_used_slotid, args->sa_cache_this);
1758         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1759         *p++ = cpu_to_be32(slot->seq_nr);
1760         *p++ = cpu_to_be32(args->sa_slotid);
1761         *p++ = cpu_to_be32(tp->highest_used_slotid);
1762         *p = cpu_to_be32(args->sa_cache_this);
1763         hdr->nops++;
1764         hdr->replen += decode_sequence_maxsz;
1765 #endif /* CONFIG_NFS_V4_1 */
1766 }
1767
1768 #ifdef CONFIG_NFS_V4_1
1769 static void
1770 encode_getdeviceinfo(struct xdr_stream *xdr,
1771                      const struct nfs4_getdeviceinfo_args *args,
1772                      struct compound_hdr *hdr)
1773 {
1774         __be32 *p;
1775
1776         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1777         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1778         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1779                                     NFS4_DEVICEID4_SIZE);
1780         *p++ = cpu_to_be32(args->pdev->layout_type);
1781         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1782         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1783         hdr->nops++;
1784         hdr->replen += decode_getdeviceinfo_maxsz;
1785 }
1786
1787 static void
1788 encode_layoutget(struct xdr_stream *xdr,
1789                       const struct nfs4_layoutget_args *args,
1790                       struct compound_hdr *hdr)
1791 {
1792         __be32 *p;
1793
1794         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1795         *p++ = cpu_to_be32(OP_LAYOUTGET);
1796         *p++ = cpu_to_be32(0);     /* Signal layout available */
1797         *p++ = cpu_to_be32(args->type);
1798         *p++ = cpu_to_be32(args->range.iomode);
1799         p = xdr_encode_hyper(p, args->range.offset);
1800         p = xdr_encode_hyper(p, args->range.length);
1801         p = xdr_encode_hyper(p, args->minlength);
1802         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1803         *p = cpu_to_be32(args->maxcount);
1804
1805         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1806                 __func__,
1807                 args->type,
1808                 args->range.iomode,
1809                 (unsigned long)args->range.offset,
1810                 (unsigned long)args->range.length,
1811                 args->maxcount);
1812         hdr->nops++;
1813         hdr->replen += decode_layoutget_maxsz;
1814 }
1815 #endif /* CONFIG_NFS_V4_1 */
1816
1817 /*
1818  * END OF "GENERIC" ENCODE ROUTINES.
1819  */
1820
1821 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1822 {
1823 #if defined(CONFIG_NFS_V4_1)
1824         if (args->sa_session)
1825                 return args->sa_session->clp->cl_mvops->minor_version;
1826 #endif /* CONFIG_NFS_V4_1 */
1827         return 0;
1828 }
1829
1830 /*
1831  * Encode an ACCESS request
1832  */
1833 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1834                                 const struct nfs4_accessargs *args)
1835 {
1836         struct compound_hdr hdr = {
1837                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1838         };
1839
1840         encode_compound_hdr(xdr, req, &hdr);
1841         encode_sequence(xdr, &args->seq_args, &hdr);
1842         encode_putfh(xdr, args->fh, &hdr);
1843         encode_access(xdr, args->access, &hdr);
1844         encode_getfattr(xdr, args->bitmask, &hdr);
1845         encode_nops(&hdr);
1846 }
1847
1848 /*
1849  * Encode LOOKUP request
1850  */
1851 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1852                                 const struct nfs4_lookup_arg *args)
1853 {
1854         struct compound_hdr hdr = {
1855                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1856         };
1857
1858         encode_compound_hdr(xdr, req, &hdr);
1859         encode_sequence(xdr, &args->seq_args, &hdr);
1860         encode_putfh(xdr, args->dir_fh, &hdr);
1861         encode_lookup(xdr, args->name, &hdr);
1862         encode_getfh(xdr, &hdr);
1863         encode_getfattr(xdr, args->bitmask, &hdr);
1864         encode_nops(&hdr);
1865 }
1866
1867 /*
1868  * Encode LOOKUP_ROOT request
1869  */
1870 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1871                                      struct xdr_stream *xdr,
1872                                      const struct nfs4_lookup_root_arg *args)
1873 {
1874         struct compound_hdr hdr = {
1875                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1876         };
1877
1878         encode_compound_hdr(xdr, req, &hdr);
1879         encode_sequence(xdr, &args->seq_args, &hdr);
1880         encode_putrootfh(xdr, &hdr);
1881         encode_getfh(xdr, &hdr);
1882         encode_getfattr(xdr, args->bitmask, &hdr);
1883         encode_nops(&hdr);
1884 }
1885
1886 /*
1887  * Encode REMOVE request
1888  */
1889 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1890                                 const struct nfs_removeargs *args)
1891 {
1892         struct compound_hdr hdr = {
1893                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1894         };
1895
1896         encode_compound_hdr(xdr, req, &hdr);
1897         encode_sequence(xdr, &args->seq_args, &hdr);
1898         encode_putfh(xdr, args->fh, &hdr);
1899         encode_remove(xdr, &args->name, &hdr);
1900         encode_getfattr(xdr, args->bitmask, &hdr);
1901         encode_nops(&hdr);
1902 }
1903
1904 /*
1905  * Encode RENAME request
1906  */
1907 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1908                                 const struct nfs_renameargs *args)
1909 {
1910         struct compound_hdr hdr = {
1911                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1912         };
1913
1914         encode_compound_hdr(xdr, req, &hdr);
1915         encode_sequence(xdr, &args->seq_args, &hdr);
1916         encode_putfh(xdr, args->old_dir, &hdr);
1917         encode_savefh(xdr, &hdr);
1918         encode_putfh(xdr, args->new_dir, &hdr);
1919         encode_rename(xdr, args->old_name, args->new_name, &hdr);
1920         encode_getfattr(xdr, args->bitmask, &hdr);
1921         encode_restorefh(xdr, &hdr);
1922         encode_getfattr(xdr, args->bitmask, &hdr);
1923         encode_nops(&hdr);
1924 }
1925
1926 /*
1927  * Encode LINK request
1928  */
1929 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
1930                              const struct nfs4_link_arg *args)
1931 {
1932         struct compound_hdr hdr = {
1933                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1934         };
1935
1936         encode_compound_hdr(xdr, req, &hdr);
1937         encode_sequence(xdr, &args->seq_args, &hdr);
1938         encode_putfh(xdr, args->fh, &hdr);
1939         encode_savefh(xdr, &hdr);
1940         encode_putfh(xdr, args->dir_fh, &hdr);
1941         encode_link(xdr, args->name, &hdr);
1942         encode_getfattr(xdr, args->bitmask, &hdr);
1943         encode_restorefh(xdr, &hdr);
1944         encode_getfattr(xdr, args->bitmask, &hdr);
1945         encode_nops(&hdr);
1946 }
1947
1948 /*
1949  * Encode CREATE request
1950  */
1951 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
1952                                 const struct nfs4_create_arg *args)
1953 {
1954         struct compound_hdr hdr = {
1955                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1956         };
1957
1958         encode_compound_hdr(xdr, req, &hdr);
1959         encode_sequence(xdr, &args->seq_args, &hdr);
1960         encode_putfh(xdr, args->dir_fh, &hdr);
1961         encode_savefh(xdr, &hdr);
1962         encode_create(xdr, args, &hdr);
1963         encode_getfh(xdr, &hdr);
1964         encode_getfattr(xdr, args->bitmask, &hdr);
1965         encode_restorefh(xdr, &hdr);
1966         encode_getfattr(xdr, args->bitmask, &hdr);
1967         encode_nops(&hdr);
1968 }
1969
1970 /*
1971  * Encode SYMLINK request
1972  */
1973 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
1974                                  const struct nfs4_create_arg *args)
1975 {
1976         nfs4_xdr_enc_create(req, xdr, args);
1977 }
1978
1979 /*
1980  * Encode GETATTR request
1981  */
1982 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
1983                                  const struct nfs4_getattr_arg *args)
1984 {
1985         struct compound_hdr hdr = {
1986                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1987         };
1988
1989         encode_compound_hdr(xdr, req, &hdr);
1990         encode_sequence(xdr, &args->seq_args, &hdr);
1991         encode_putfh(xdr, args->fh, &hdr);
1992         encode_getfattr(xdr, args->bitmask, &hdr);
1993         encode_nops(&hdr);
1994 }
1995
1996 /*
1997  * Encode a CLOSE request
1998  */
1999 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2000                                struct nfs_closeargs *args)
2001 {
2002         struct compound_hdr hdr = {
2003                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2004         };
2005
2006         encode_compound_hdr(xdr, req, &hdr);
2007         encode_sequence(xdr, &args->seq_args, &hdr);
2008         encode_putfh(xdr, args->fh, &hdr);
2009         encode_close(xdr, args, &hdr);
2010         encode_getfattr(xdr, args->bitmask, &hdr);
2011         encode_nops(&hdr);
2012 }
2013
2014 /*
2015  * Encode an OPEN request
2016  */
2017 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2018                               struct nfs_openargs *args)
2019 {
2020         struct compound_hdr hdr = {
2021                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2022         };
2023
2024         encode_compound_hdr(xdr, req, &hdr);
2025         encode_sequence(xdr, &args->seq_args, &hdr);
2026         encode_putfh(xdr, args->fh, &hdr);
2027         encode_savefh(xdr, &hdr);
2028         encode_open(xdr, args, &hdr);
2029         encode_getfh(xdr, &hdr);
2030         encode_getfattr(xdr, args->bitmask, &hdr);
2031         encode_restorefh(xdr, &hdr);
2032         encode_getfattr(xdr, args->bitmask, &hdr);
2033         encode_nops(&hdr);
2034 }
2035
2036 /*
2037  * Encode an OPEN_CONFIRM request
2038  */
2039 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2040                                       struct xdr_stream *xdr,
2041                                       struct nfs_open_confirmargs *args)
2042 {
2043         struct compound_hdr hdr = {
2044                 .nops   = 0,
2045         };
2046
2047         encode_compound_hdr(xdr, req, &hdr);
2048         encode_putfh(xdr, args->fh, &hdr);
2049         encode_open_confirm(xdr, args, &hdr);
2050         encode_nops(&hdr);
2051 }
2052
2053 /*
2054  * Encode an OPEN request with no attributes.
2055  */
2056 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2057                                      struct xdr_stream *xdr,
2058                                      struct nfs_openargs *args)
2059 {
2060         struct compound_hdr hdr = {
2061                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2062         };
2063
2064         encode_compound_hdr(xdr, req, &hdr);
2065         encode_sequence(xdr, &args->seq_args, &hdr);
2066         encode_putfh(xdr, args->fh, &hdr);
2067         encode_open(xdr, args, &hdr);
2068         encode_getfattr(xdr, args->bitmask, &hdr);
2069         encode_nops(&hdr);
2070 }
2071
2072 /*
2073  * Encode an OPEN_DOWNGRADE request
2074  */
2075 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2076                                         struct xdr_stream *xdr,
2077                                         struct nfs_closeargs *args)
2078 {
2079         struct compound_hdr hdr = {
2080                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2081         };
2082
2083         encode_compound_hdr(xdr, req, &hdr);
2084         encode_sequence(xdr, &args->seq_args, &hdr);
2085         encode_putfh(xdr, args->fh, &hdr);
2086         encode_open_downgrade(xdr, args, &hdr);
2087         encode_getfattr(xdr, args->bitmask, &hdr);
2088         encode_nops(&hdr);
2089 }
2090
2091 /*
2092  * Encode a LOCK request
2093  */
2094 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2095                               struct nfs_lock_args *args)
2096 {
2097         struct compound_hdr hdr = {
2098                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2099         };
2100
2101         encode_compound_hdr(xdr, req, &hdr);
2102         encode_sequence(xdr, &args->seq_args, &hdr);
2103         encode_putfh(xdr, args->fh, &hdr);
2104         encode_lock(xdr, args, &hdr);
2105         encode_nops(&hdr);
2106 }
2107
2108 /*
2109  * Encode a LOCKT request
2110  */
2111 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2112                                struct nfs_lockt_args *args)
2113 {
2114         struct compound_hdr hdr = {
2115                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2116         };
2117
2118         encode_compound_hdr(xdr, req, &hdr);
2119         encode_sequence(xdr, &args->seq_args, &hdr);
2120         encode_putfh(xdr, args->fh, &hdr);
2121         encode_lockt(xdr, args, &hdr);
2122         encode_nops(&hdr);
2123 }
2124
2125 /*
2126  * Encode a LOCKU request
2127  */
2128 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2129                                struct nfs_locku_args *args)
2130 {
2131         struct compound_hdr hdr = {
2132                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2133         };
2134
2135         encode_compound_hdr(xdr, req, &hdr);
2136         encode_sequence(xdr, &args->seq_args, &hdr);
2137         encode_putfh(xdr, args->fh, &hdr);
2138         encode_locku(xdr, args, &hdr);
2139         encode_nops(&hdr);
2140 }
2141
2142 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2143                                            struct xdr_stream *xdr,
2144                                         struct nfs_release_lockowner_args *args)
2145 {
2146         struct compound_hdr hdr = {
2147                 .minorversion = 0,
2148         };
2149
2150         encode_compound_hdr(xdr, req, &hdr);
2151         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2152         encode_nops(&hdr);
2153 }
2154
2155 /*
2156  * Encode a READLINK request
2157  */
2158 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2159                                   const struct nfs4_readlink *args)
2160 {
2161         struct compound_hdr hdr = {
2162                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2163         };
2164
2165         encode_compound_hdr(xdr, req, &hdr);
2166         encode_sequence(xdr, &args->seq_args, &hdr);
2167         encode_putfh(xdr, args->fh, &hdr);
2168         encode_readlink(xdr, args, req, &hdr);
2169
2170         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2171                         args->pgbase, args->pglen);
2172         encode_nops(&hdr);
2173 }
2174
2175 /*
2176  * Encode a READDIR request
2177  */
2178 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2179                                  const struct nfs4_readdir_arg *args)
2180 {
2181         struct compound_hdr hdr = {
2182                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2183         };
2184
2185         encode_compound_hdr(xdr, req, &hdr);
2186         encode_sequence(xdr, &args->seq_args, &hdr);
2187         encode_putfh(xdr, args->fh, &hdr);
2188         encode_readdir(xdr, args, req, &hdr);
2189
2190         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2191                          args->pgbase, args->count);
2192         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2193                         __func__, hdr.replen << 2, args->pages,
2194                         args->pgbase, args->count);
2195         encode_nops(&hdr);
2196 }
2197
2198 /*
2199  * Encode a READ request
2200  */
2201 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2202                               struct nfs_readargs *args)
2203 {
2204         struct compound_hdr hdr = {
2205                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2206         };
2207
2208         encode_compound_hdr(xdr, req, &hdr);
2209         encode_sequence(xdr, &args->seq_args, &hdr);
2210         encode_putfh(xdr, args->fh, &hdr);
2211         encode_read(xdr, args, &hdr);
2212
2213         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2214                          args->pages, args->pgbase, args->count);
2215         req->rq_rcv_buf.flags |= XDRBUF_READ;
2216         encode_nops(&hdr);
2217 }
2218
2219 /*
2220  * Encode an SETATTR request
2221  */
2222 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2223                                  struct nfs_setattrargs *args)
2224 {
2225         struct compound_hdr hdr = {
2226                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2227         };
2228
2229         encode_compound_hdr(xdr, req, &hdr);
2230         encode_sequence(xdr, &args->seq_args, &hdr);
2231         encode_putfh(xdr, args->fh, &hdr);
2232         encode_setattr(xdr, args, args->server, &hdr);
2233         encode_getfattr(xdr, args->bitmask, &hdr);
2234         encode_nops(&hdr);
2235 }
2236
2237 /*
2238  * Encode a GETACL request
2239  */
2240 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2241                                 struct nfs_getaclargs *args)
2242 {
2243         struct compound_hdr hdr = {
2244                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2245         };
2246         uint32_t replen;
2247
2248         encode_compound_hdr(xdr, req, &hdr);
2249         encode_sequence(xdr, &args->seq_args, &hdr);
2250         encode_putfh(xdr, args->fh, &hdr);
2251         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2252         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2253
2254         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2255                 args->acl_pages, args->acl_pgbase, args->acl_len);
2256         encode_nops(&hdr);
2257 }
2258
2259 /*
2260  * Encode a WRITE request
2261  */
2262 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2263                                struct nfs_writeargs *args)
2264 {
2265         struct compound_hdr hdr = {
2266                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2267         };
2268
2269         encode_compound_hdr(xdr, req, &hdr);
2270         encode_sequence(xdr, &args->seq_args, &hdr);
2271         encode_putfh(xdr, args->fh, &hdr);
2272         encode_write(xdr, args, &hdr);
2273         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2274         encode_getfattr(xdr, args->bitmask, &hdr);
2275         encode_nops(&hdr);
2276 }
2277
2278 /*
2279  *  a COMMIT request
2280  */
2281 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2282                                 struct nfs_writeargs *args)
2283 {
2284         struct compound_hdr hdr = {
2285                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2286         };
2287
2288         encode_compound_hdr(xdr, req, &hdr);
2289         encode_sequence(xdr, &args->seq_args, &hdr);
2290         encode_putfh(xdr, args->fh, &hdr);
2291         encode_commit(xdr, args, &hdr);
2292         encode_getfattr(xdr, args->bitmask, &hdr);
2293         encode_nops(&hdr);
2294 }
2295
2296 /*
2297  * FSINFO request
2298  */
2299 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2300                                 struct nfs4_fsinfo_arg *args)
2301 {
2302         struct compound_hdr hdr = {
2303                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2304         };
2305
2306         encode_compound_hdr(xdr, req, &hdr);
2307         encode_sequence(xdr, &args->seq_args, &hdr);
2308         encode_putfh(xdr, args->fh, &hdr);
2309         encode_fsinfo(xdr, args->bitmask, &hdr);
2310         encode_nops(&hdr);
2311 }
2312
2313 /*
2314  * a PATHCONF request
2315  */
2316 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2317                                   const struct nfs4_pathconf_arg *args)
2318 {
2319         struct compound_hdr hdr = {
2320                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2321         };
2322
2323         encode_compound_hdr(xdr, req, &hdr);
2324         encode_sequence(xdr, &args->seq_args, &hdr);
2325         encode_putfh(xdr, args->fh, &hdr);
2326         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2327                            &hdr);
2328         encode_nops(&hdr);
2329 }
2330
2331 /*
2332  * a STATFS request
2333  */
2334 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2335                                 const struct nfs4_statfs_arg *args)
2336 {
2337         struct compound_hdr hdr = {
2338                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2339         };
2340
2341         encode_compound_hdr(xdr, req, &hdr);
2342         encode_sequence(xdr, &args->seq_args, &hdr);
2343         encode_putfh(xdr, args->fh, &hdr);
2344         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2345                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2346         encode_nops(&hdr);
2347 }
2348
2349 /*
2350  * GETATTR_BITMAP request
2351  */
2352 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2353                                      struct xdr_stream *xdr,
2354                                      struct nfs4_server_caps_arg *args)
2355 {
2356         struct compound_hdr hdr = {
2357                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2358         };
2359
2360         encode_compound_hdr(xdr, req, &hdr);
2361         encode_sequence(xdr, &args->seq_args, &hdr);
2362         encode_putfh(xdr, args->fhandle, &hdr);
2363         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2364                            FATTR4_WORD0_LINK_SUPPORT|
2365                            FATTR4_WORD0_SYMLINK_SUPPORT|
2366                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2367         encode_nops(&hdr);
2368 }
2369
2370 /*
2371  * a RENEW request
2372  */
2373 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2374                                struct nfs_client *clp)
2375 {
2376         struct compound_hdr hdr = {
2377                 .nops   = 0,
2378         };
2379
2380         encode_compound_hdr(xdr, req, &hdr);
2381         encode_renew(xdr, clp, &hdr);
2382         encode_nops(&hdr);
2383 }
2384
2385 /*
2386  * a SETCLIENTID request
2387  */
2388 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2389                                      struct xdr_stream *xdr,
2390                                      struct nfs4_setclientid *sc)
2391 {
2392         struct compound_hdr hdr = {
2393                 .nops   = 0,
2394         };
2395
2396         encode_compound_hdr(xdr, req, &hdr);
2397         encode_setclientid(xdr, sc, &hdr);
2398         encode_nops(&hdr);
2399 }
2400
2401 /*
2402  * a SETCLIENTID_CONFIRM request
2403  */
2404 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2405                                              struct xdr_stream *xdr,
2406                                              struct nfs4_setclientid_res *arg)
2407 {
2408         struct compound_hdr hdr = {
2409                 .nops   = 0,
2410         };
2411         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2412
2413         encode_compound_hdr(xdr, req, &hdr);
2414         encode_setclientid_confirm(xdr, arg, &hdr);
2415         encode_putrootfh(xdr, &hdr);
2416         encode_fsinfo(xdr, lease_bitmap, &hdr);
2417         encode_nops(&hdr);
2418 }
2419
2420 /*
2421  * DELEGRETURN request
2422  */
2423 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2424                                      struct xdr_stream *xdr,
2425                                      const struct nfs4_delegreturnargs *args)
2426 {
2427         struct compound_hdr hdr = {
2428                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2429         };
2430
2431         encode_compound_hdr(xdr, req, &hdr);
2432         encode_sequence(xdr, &args->seq_args, &hdr);
2433         encode_putfh(xdr, args->fhandle, &hdr);
2434         encode_delegreturn(xdr, args->stateid, &hdr);
2435         encode_getfattr(xdr, args->bitmask, &hdr);
2436         encode_nops(&hdr);
2437 }
2438
2439 /*
2440  * Encode FS_LOCATIONS request
2441  */
2442 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2443                                       struct xdr_stream *xdr,
2444                                       struct nfs4_fs_locations_arg *args)
2445 {
2446         struct compound_hdr hdr = {
2447                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2448         };
2449         uint32_t replen;
2450
2451         encode_compound_hdr(xdr, req, &hdr);
2452         encode_sequence(xdr, &args->seq_args, &hdr);
2453         encode_putfh(xdr, args->dir_fh, &hdr);
2454         encode_lookup(xdr, args->name, &hdr);
2455         replen = hdr.replen;    /* get the attribute into args->page */
2456         encode_fs_locations(xdr, args->bitmask, &hdr);
2457
2458         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2459                         0, PAGE_SIZE);
2460         encode_nops(&hdr);
2461 }
2462
2463 #if defined(CONFIG_NFS_V4_1)
2464 /*
2465  * EXCHANGE_ID request
2466  */
2467 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2468                                      struct xdr_stream *xdr,
2469                                      struct nfs41_exchange_id_args *args)
2470 {
2471         struct compound_hdr hdr = {
2472                 .minorversion = args->client->cl_mvops->minor_version,
2473         };
2474
2475         encode_compound_hdr(xdr, req, &hdr);
2476         encode_exchange_id(xdr, args, &hdr);
2477         encode_nops(&hdr);
2478 }
2479
2480 /*
2481  * a CREATE_SESSION request
2482  */
2483 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2484                                         struct xdr_stream *xdr,
2485                                         struct nfs41_create_session_args *args)
2486 {
2487         struct compound_hdr hdr = {
2488                 .minorversion = args->client->cl_mvops->minor_version,
2489         };
2490
2491         encode_compound_hdr(xdr, req, &hdr);
2492         encode_create_session(xdr, args, &hdr);
2493         encode_nops(&hdr);
2494 }
2495
2496 /*
2497  * a DESTROY_SESSION request
2498  */
2499 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2500                                          struct xdr_stream *xdr,
2501                                          struct nfs4_session *session)
2502 {
2503         struct compound_hdr hdr = {
2504                 .minorversion = session->clp->cl_mvops->minor_version,
2505         };
2506
2507         encode_compound_hdr(xdr, req, &hdr);
2508         encode_destroy_session(xdr, session, &hdr);
2509         encode_nops(&hdr);
2510 }
2511
2512 /*
2513  * a SEQUENCE request
2514  */
2515 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2516                                   struct nfs4_sequence_args *args)
2517 {
2518         struct compound_hdr hdr = {
2519                 .minorversion = nfs4_xdr_minorversion(args),
2520         };
2521
2522         encode_compound_hdr(xdr, req, &hdr);
2523         encode_sequence(xdr, args, &hdr);
2524         encode_nops(&hdr);
2525 }
2526
2527 /*
2528  * a GET_LEASE_TIME request
2529  */
2530 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2531                                         struct xdr_stream *xdr,
2532                                         struct nfs4_get_lease_time_args *args)
2533 {
2534         struct compound_hdr hdr = {
2535                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2536         };
2537         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2538
2539         encode_compound_hdr(xdr, req, &hdr);
2540         encode_sequence(xdr, &args->la_seq_args, &hdr);
2541         encode_putrootfh(xdr, &hdr);
2542         encode_fsinfo(xdr, lease_bitmap, &hdr);
2543         encode_nops(&hdr);
2544 }
2545
2546 /*
2547  * a RECLAIM_COMPLETE request
2548  */
2549 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2550                                           struct xdr_stream *xdr,
2551                                 struct nfs41_reclaim_complete_args *args)
2552 {
2553         struct compound_hdr hdr = {
2554                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2555         };
2556
2557         encode_compound_hdr(xdr, req, &hdr);
2558         encode_sequence(xdr, &args->seq_args, &hdr);
2559         encode_reclaim_complete(xdr, args, &hdr);
2560         encode_nops(&hdr);
2561 }
2562
2563 /*
2564  * Encode GETDEVICEINFO request
2565  */
2566 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2567                                        struct xdr_stream *xdr,
2568                                        struct nfs4_getdeviceinfo_args *args)
2569 {
2570         struct compound_hdr hdr = {
2571                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2572         };
2573
2574         encode_compound_hdr(xdr, req, &hdr);
2575         encode_sequence(xdr, &args->seq_args, &hdr);
2576         encode_getdeviceinfo(xdr, args, &hdr);
2577
2578         /* set up reply kvec. Subtract notification bitmap max size (2)
2579          * so that notification bitmap is put in xdr_buf tail */
2580         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2581                          args->pdev->pages, args->pdev->pgbase,
2582                          args->pdev->pglen);
2583
2584         encode_nops(&hdr);
2585 }
2586
2587 /*
2588  *  Encode LAYOUTGET request
2589  */
2590 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2591                                    struct xdr_stream *xdr,
2592                                    struct nfs4_layoutget_args *args)
2593 {
2594         struct compound_hdr hdr = {
2595                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2596         };
2597
2598         encode_compound_hdr(xdr, req, &hdr);
2599         encode_sequence(xdr, &args->seq_args, &hdr);
2600         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2601         encode_layoutget(xdr, args, &hdr);
2602         encode_nops(&hdr);
2603 }
2604 #endif /* CONFIG_NFS_V4_1 */
2605
2606 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2607 {
2608         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2609                 "Remaining buffer length is %tu words.\n",
2610                 func, xdr->end - xdr->p);
2611 }
2612
2613 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2614 {
2615         __be32 *p;
2616
2617         p = xdr_inline_decode(xdr, 4);
2618         if (unlikely(!p))
2619                 goto out_overflow;
2620         *len = be32_to_cpup(p);
2621         p = xdr_inline_decode(xdr, *len);
2622         if (unlikely(!p))
2623                 goto out_overflow;
2624         *string = (char *)p;
2625         return 0;
2626 out_overflow:
2627         print_overflow_msg(__func__, xdr);
2628         return -EIO;
2629 }
2630
2631 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2632 {
2633         __be32 *p;
2634
2635         p = xdr_inline_decode(xdr, 8);
2636         if (unlikely(!p))
2637                 goto out_overflow;
2638         hdr->status = be32_to_cpup(p++);
2639         hdr->taglen = be32_to_cpup(p);
2640
2641         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2642         if (unlikely(!p))
2643                 goto out_overflow;
2644         hdr->tag = (char *)p;
2645         p += XDR_QUADLEN(hdr->taglen);
2646         hdr->nops = be32_to_cpup(p);
2647         if (unlikely(hdr->nops < 1))
2648                 return nfs4_stat_to_errno(hdr->status);
2649         return 0;
2650 out_overflow:
2651         print_overflow_msg(__func__, xdr);
2652         return -EIO;
2653 }
2654
2655 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2656 {
2657         __be32 *p;
2658         uint32_t opnum;
2659         int32_t nfserr;
2660
2661         p = xdr_inline_decode(xdr, 8);
2662         if (unlikely(!p))
2663                 goto out_overflow;
2664         opnum = be32_to_cpup(p++);
2665         if (opnum != expected) {
2666                 dprintk("nfs: Server returned operation"
2667                         " %d but we issued a request for %d\n",
2668                                 opnum, expected);
2669                 return -EIO;
2670         }
2671         nfserr = be32_to_cpup(p);
2672         if (nfserr != NFS_OK)
2673                 return nfs4_stat_to_errno(nfserr);
2674         return 0;
2675 out_overflow:
2676         print_overflow_msg(__func__, xdr);
2677         return -EIO;
2678 }
2679
2680 /* Dummy routine */
2681 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2682 {
2683         __be32 *p;
2684         unsigned int strlen;
2685         char *str;
2686
2687         p = xdr_inline_decode(xdr, 12);
2688         if (likely(p))
2689                 return decode_opaque_inline(xdr, &strlen, &str);
2690         print_overflow_msg(__func__, xdr);
2691         return -EIO;
2692 }
2693
2694 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2695 {
2696         uint32_t bmlen;
2697         __be32 *p;
2698
2699         p = xdr_inline_decode(xdr, 4);
2700         if (unlikely(!p))
2701                 goto out_overflow;
2702         bmlen = be32_to_cpup(p);
2703
2704         bitmap[0] = bitmap[1] = 0;
2705         p = xdr_inline_decode(xdr, (bmlen << 2));
2706         if (unlikely(!p))
2707                 goto out_overflow;
2708         if (bmlen > 0) {
2709                 bitmap[0] = be32_to_cpup(p++);
2710                 if (bmlen > 1)
2711                         bitmap[1] = be32_to_cpup(p);
2712         }
2713         return 0;
2714 out_overflow:
2715         print_overflow_msg(__func__, xdr);
2716         return -EIO;
2717 }
2718
2719 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2720 {
2721         __be32 *p;
2722
2723         p = xdr_inline_decode(xdr, 4);
2724         if (unlikely(!p))
2725                 goto out_overflow;
2726         *attrlen = be32_to_cpup(p);
2727         *savep = xdr->p;
2728         return 0;
2729 out_overflow:
2730         print_overflow_msg(__func__, xdr);
2731         return -EIO;
2732 }
2733
2734 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2735 {
2736         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2737                 int ret;
2738                 ret = decode_attr_bitmap(xdr, bitmask);
2739                 if (unlikely(ret < 0))
2740                         return ret;
2741                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2742         } else
2743                 bitmask[0] = bitmask[1] = 0;
2744         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2745         return 0;
2746 }
2747
2748 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2749 {
2750         __be32 *p;
2751         int ret = 0;
2752
2753         *type = 0;
2754         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2755                 return -EIO;
2756         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2757                 p = xdr_inline_decode(xdr, 4);
2758                 if (unlikely(!p))
2759                         goto out_overflow;
2760                 *type = be32_to_cpup(p);
2761                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2762                         dprintk("%s: bad type %d\n", __func__, *type);
2763                         return -EIO;
2764                 }
2765                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2766                 ret = NFS_ATTR_FATTR_TYPE;
2767         }
2768         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2769         return ret;
2770 out_overflow:
2771         print_overflow_msg(__func__, xdr);
2772         return -EIO;
2773 }
2774
2775 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2776 {
2777         __be32 *p;
2778         int ret = 0;
2779
2780         *change = 0;
2781         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2782                 return -EIO;
2783         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2784                 p = xdr_inline_decode(xdr, 8);
2785                 if (unlikely(!p))
2786                         goto out_overflow;
2787                 xdr_decode_hyper(p, change);
2788                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2789                 ret = NFS_ATTR_FATTR_CHANGE;
2790         }
2791         dprintk("%s: change attribute=%Lu\n", __func__,
2792                         (unsigned long long)*change);
2793         return ret;
2794 out_overflow:
2795         print_overflow_msg(__func__, xdr);
2796         return -EIO;
2797 }
2798
2799 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2800 {
2801         __be32 *p;
2802         int ret = 0;
2803
2804         *size = 0;
2805         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2806                 return -EIO;
2807         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2808                 p = xdr_inline_decode(xdr, 8);
2809                 if (unlikely(!p))
2810                         goto out_overflow;
2811                 xdr_decode_hyper(p, size);
2812                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2813                 ret = NFS_ATTR_FATTR_SIZE;
2814         }
2815         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2816         return ret;
2817 out_overflow:
2818         print_overflow_msg(__func__, xdr);
2819         return -EIO;
2820 }
2821
2822 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2823 {
2824         __be32 *p;
2825
2826         *res = 0;
2827         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2828                 return -EIO;
2829         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2830                 p = xdr_inline_decode(xdr, 4);
2831                 if (unlikely(!p))
2832                         goto out_overflow;
2833                 *res = be32_to_cpup(p);
2834                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2835         }
2836         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2837         return 0;
2838 out_overflow:
2839         print_overflow_msg(__func__, xdr);
2840         return -EIO;
2841 }
2842
2843 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2844 {
2845         __be32 *p;
2846
2847         *res = 0;
2848         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2849                 return -EIO;
2850         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2851                 p = xdr_inline_decode(xdr, 4);
2852                 if (unlikely(!p))
2853                         goto out_overflow;
2854                 *res = be32_to_cpup(p);
2855                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2856         }
2857         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2858         return 0;
2859 out_overflow:
2860         print_overflow_msg(__func__, xdr);
2861         return -EIO;
2862 }
2863
2864 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2865 {
2866         __be32 *p;
2867         int ret = 0;
2868
2869         fsid->major = 0;
2870         fsid->minor = 0;
2871         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2872                 return -EIO;
2873         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2874                 p = xdr_inline_decode(xdr, 16);
2875                 if (unlikely(!p))
2876                         goto out_overflow;
2877                 p = xdr_decode_hyper(p, &fsid->major);
2878                 xdr_decode_hyper(p, &fsid->minor);
2879                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2880                 ret = NFS_ATTR_FATTR_FSID;
2881         }
2882         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2883                         (unsigned long long)fsid->major,
2884                         (unsigned long long)fsid->minor);
2885         return ret;
2886 out_overflow:
2887         print_overflow_msg(__func__, xdr);
2888         return -EIO;
2889 }
2890
2891 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2892 {
2893         __be32 *p;
2894
2895         *res = 60;
2896         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2897                 return -EIO;
2898         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2899                 p = xdr_inline_decode(xdr, 4);
2900                 if (unlikely(!p))
2901                         goto out_overflow;
2902                 *res = be32_to_cpup(p);
2903                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2904         }
2905         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2906         return 0;
2907 out_overflow:
2908         print_overflow_msg(__func__, xdr);
2909         return -EIO;
2910 }
2911
2912 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2913 {
2914         __be32 *p;
2915
2916         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2917                 return -EIO;
2918         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2919                 p = xdr_inline_decode(xdr, 4);
2920                 if (unlikely(!p))
2921                         goto out_overflow;
2922                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2923         }
2924         return 0;
2925 out_overflow:
2926         print_overflow_msg(__func__, xdr);
2927         return -EIO;
2928 }
2929
2930 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2931 {
2932         __be32 *p;
2933         int len;
2934
2935         if (fh != NULL)
2936                 memset(fh, 0, sizeof(*fh));
2937
2938         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2939                 return -EIO;
2940         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2941                 p = xdr_inline_decode(xdr, 4);
2942                 if (unlikely(!p))
2943                         goto out_overflow;
2944                 len = be32_to_cpup(p);
2945                 if (len > NFS4_FHSIZE)
2946                         return -EIO;
2947                 p = xdr_inline_decode(xdr, len);
2948                 if (unlikely(!p))
2949                         goto out_overflow;
2950                 if (fh != NULL) {
2951                         memcpy(fh->data, p, len);
2952                         fh->size = len;
2953                 }
2954                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2955         }
2956         return 0;
2957 out_overflow:
2958         print_overflow_msg(__func__, xdr);
2959         return -EIO;
2960 }
2961
2962 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2963 {
2964         __be32 *p;
2965
2966         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2967         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2968                 return -EIO;
2969         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2970                 p = xdr_inline_decode(xdr, 4);
2971                 if (unlikely(!p))
2972                         goto out_overflow;
2973                 *res = be32_to_cpup(p);
2974                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2975         }
2976         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2977         return 0;
2978 out_overflow:
2979         print_overflow_msg(__func__, xdr);
2980         return -EIO;
2981 }
2982
2983 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2984 {
2985         __be32 *p;
2986         int ret = 0;
2987
2988         *fileid = 0;
2989         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2990                 return -EIO;
2991         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2992                 p = xdr_inline_decode(xdr, 8);
2993                 if (unlikely(!p))
2994                         goto out_overflow;
2995                 xdr_decode_hyper(p, fileid);
2996                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2997                 ret = NFS_ATTR_FATTR_FILEID;
2998         }
2999         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3000         return ret;
3001 out_overflow:
3002         print_overflow_msg(__func__, xdr);
3003         return -EIO;
3004 }
3005
3006 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3007 {
3008         __be32 *p;
3009         int ret = 0;
3010
3011         *fileid = 0;
3012         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3013                 return -EIO;
3014         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3015                 p = xdr_inline_decode(xdr, 8);
3016                 if (unlikely(!p))
3017                         goto out_overflow;
3018                 xdr_decode_hyper(p, fileid);
3019                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3020                 ret = NFS_ATTR_FATTR_FILEID;
3021         }
3022         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3023         return ret;
3024 out_overflow:
3025         print_overflow_msg(__func__, xdr);
3026         return -EIO;
3027 }
3028
3029 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3030 {
3031         __be32 *p;
3032         int status = 0;
3033
3034         *res = 0;
3035         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3036                 return -EIO;
3037         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3038                 p = xdr_inline_decode(xdr, 8);
3039                 if (unlikely(!p))
3040                         goto out_overflow;
3041                 xdr_decode_hyper(p, res);
3042                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3043         }
3044         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3045         return status;
3046 out_overflow:
3047         print_overflow_msg(__func__, xdr);
3048         return -EIO;
3049 }
3050
3051 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3052 {
3053         __be32 *p;
3054         int status = 0;
3055
3056         *res = 0;
3057         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3058                 return -EIO;
3059         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3060                 p = xdr_inline_decode(xdr, 8);
3061                 if (unlikely(!p))
3062                         goto out_overflow;
3063                 xdr_decode_hyper(p, res);
3064                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3065         }
3066         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3067         return status;
3068 out_overflow:
3069         print_overflow_msg(__func__, xdr);
3070         return -EIO;
3071 }
3072
3073 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3074 {
3075         __be32 *p;
3076         int status = 0;
3077
3078         *res = 0;
3079         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3080                 return -EIO;
3081         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3082                 p = xdr_inline_decode(xdr, 8);
3083                 if (unlikely(!p))
3084                         goto out_overflow;
3085                 xdr_decode_hyper(p, res);
3086                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3087         }
3088         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3089         return status;
3090 out_overflow:
3091         print_overflow_msg(__func__, xdr);
3092         return -EIO;
3093 }
3094
3095 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3096 {
3097         u32 n;
3098         __be32 *p;
3099         int status = 0;
3100
3101         p = xdr_inline_decode(xdr, 4);
3102         if (unlikely(!p))
3103                 goto out_overflow;
3104         n = be32_to_cpup(p);
3105         if (n == 0)
3106                 goto root_path;
3107         dprintk("path ");
3108         path->ncomponents = 0;
3109         while (path->ncomponents < n) {
3110                 struct nfs4_string *component = &path->components[path->ncomponents];
3111                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3112                 if (unlikely(status != 0))
3113                         goto out_eio;
3114                 if (path->ncomponents != n)
3115                         dprintk("/");
3116                 dprintk("%s", component->data);
3117                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3118                         path->ncomponents++;
3119                 else {
3120                         dprintk("cannot parse %d components in path\n", n);
3121                         goto out_eio;
3122                 }
3123         }
3124 out:
3125         dprintk("\n");
3126         return status;
3127 root_path:
3128 /* a root pathname is sent as a zero component4 */
3129         path->ncomponents = 1;
3130         path->components[0].len=0;
3131         path->components[0].data=NULL;
3132         dprintk("path /\n");
3133         goto out;
3134 out_eio:
3135         dprintk(" status %d", status);
3136         status = -EIO;
3137         goto out;
3138 out_overflow:
3139         print_overflow_msg(__func__, xdr);
3140         return -EIO;
3141 }
3142
3143 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3144 {
3145         int n;
3146         __be32 *p;
3147         int status = -EIO;
3148
3149         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3150                 goto out;
3151         status = 0;
3152         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3153                 goto out;
3154         dprintk("%s: fsroot ", __func__);
3155         status = decode_pathname(xdr, &res->fs_path);
3156         if (unlikely(status != 0))
3157                 goto out;
3158         p = xdr_inline_decode(xdr, 4);
3159         if (unlikely(!p))
3160                 goto out_overflow;
3161         n = be32_to_cpup(p);
3162         if (n <= 0)
3163                 goto out_eio;
3164         res->nlocations = 0;
3165         while (res->nlocations < n) {
3166                 u32 m;
3167                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3168
3169                 p = xdr_inline_decode(xdr, 4);
3170                 if (unlikely(!p))
3171                         goto out_overflow;
3172                 m = be32_to_cpup(p);
3173
3174                 loc->nservers = 0;
3175                 dprintk("%s: servers ", __func__);
3176                 while (loc->nservers < m) {
3177                         struct nfs4_string *server = &loc->servers[loc->nservers];
3178                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3179                         if (unlikely(status != 0))
3180                                 goto out_eio;
3181                         dprintk("%s ", server->data);
3182                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3183                                 loc->nservers++;
3184                         else {
3185                                 unsigned int i;
3186                                 dprintk("%s: using first %u of %u servers "
3187                                         "returned for location %u\n",
3188                                                 __func__,
3189                                                 NFS4_FS_LOCATION_MAXSERVERS,
3190                                                 m, res->nlocations);
3191                                 for (i = loc->nservers; i < m; i++) {
3192                                         unsigned int len;
3193                                         char *data;
3194                                         status = decode_opaque_inline(xdr, &len, &data);
3195                                         if (unlikely(status != 0))
3196                                                 goto out_eio;
3197                                 }
3198                         }
3199                 }
3200                 status = decode_pathname(xdr, &loc->rootpath);
3201                 if (unlikely(status != 0))
3202                         goto out_eio;
3203                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3204                         res->nlocations++;
3205         }
3206         if (res->nlocations != 0)
3207                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3208 out:
3209         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3210         return status;
3211 out_overflow:
3212         print_overflow_msg(__func__, xdr);
3213 out_eio:
3214         status = -EIO;
3215         goto out;
3216 }
3217
3218 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3219 {
3220         __be32 *p;
3221         int status = 0;
3222
3223         *res = 0;
3224         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3225                 return -EIO;
3226         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3227                 p = xdr_inline_decode(xdr, 8);
3228                 if (unlikely(!p))
3229                         goto out_overflow;
3230                 xdr_decode_hyper(p, res);
3231                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3232         }
3233         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3234         return status;
3235 out_overflow:
3236         print_overflow_msg(__func__, xdr);
3237         return -EIO;
3238 }
3239
3240 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3241 {
3242         __be32 *p;
3243         int status = 0;
3244
3245         *maxlink = 1;
3246         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3247                 return -EIO;
3248         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3249                 p = xdr_inline_decode(xdr, 4);
3250                 if (unlikely(!p))
3251                         goto out_overflow;
3252                 *maxlink = be32_to_cpup(p);
3253                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3254         }
3255         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3256         return status;
3257 out_overflow:
3258         print_overflow_msg(__func__, xdr);
3259         return -EIO;
3260 }
3261
3262 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3263 {
3264         __be32 *p;
3265         int status = 0;
3266
3267         *maxname = 1024;
3268         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3269                 return -EIO;
3270         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3271                 p = xdr_inline_decode(xdr, 4);
3272                 if (unlikely(!p))
3273                         goto out_overflow;
3274                 *maxname = be32_to_cpup(p);
3275                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3276         }
3277         dprintk("%s: maxname=%u\n", __func__, *maxname);
3278         return status;
3279 out_overflow:
3280         print_overflow_msg(__func__, xdr);
3281         return -EIO;
3282 }
3283
3284 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3285 {
3286         __be32 *p;
3287         int status = 0;
3288
3289         *res = 1024;
3290         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3291                 return -EIO;
3292         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3293                 uint64_t maxread;
3294                 p = xdr_inline_decode(xdr, 8);
3295                 if (unlikely(!p))
3296                         goto out_overflow;
3297                 xdr_decode_hyper(p, &maxread);
3298                 if (maxread > 0x7FFFFFFF)
3299                         maxread = 0x7FFFFFFF;
3300                 *res = (uint32_t)maxread;
3301                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3302         }
3303         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3304         return status;
3305 out_overflow:
3306         print_overflow_msg(__func__, xdr);
3307         return -EIO;
3308 }
3309
3310 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3311 {
3312         __be32 *p;
3313         int status = 0;
3314
3315         *res = 1024;
3316         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3317                 return -EIO;
3318         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3319                 uint64_t maxwrite;
3320                 p = xdr_inline_decode(xdr, 8);
3321                 if (unlikely(!p))
3322                         goto out_overflow;
3323                 xdr_decode_hyper(p, &maxwrite);
3324                 if (maxwrite > 0x7FFFFFFF)
3325                         maxwrite = 0x7FFFFFFF;
3326                 *res = (uint32_t)maxwrite;
3327                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3328         }
3329         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3330         return status;
3331 out_overflow:
3332         print_overflow_msg(__func__, xdr);
3333         return -EIO;
3334 }
3335
3336 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3337 {
3338         uint32_t tmp;
3339         __be32 *p;
3340         int ret = 0;
3341
3342         *mode = 0;
3343         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3344                 return -EIO;
3345         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3346                 p = xdr_inline_decode(xdr, 4);
3347                 if (unlikely(!p))
3348                         goto out_overflow;
3349                 tmp = be32_to_cpup(p);
3350                 *mode = tmp & ~S_IFMT;
3351                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3352                 ret = NFS_ATTR_FATTR_MODE;
3353         }
3354         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3355         return ret;
3356 out_overflow:
3357         print_overflow_msg(__func__, xdr);
3358         return -EIO;
3359 }
3360
3361 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3362 {
3363         __be32 *p;
3364         int ret = 0;
3365
3366         *nlink = 1;
3367         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3368                 return -EIO;
3369         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3370                 p = xdr_inline_decode(xdr, 4);
3371                 if (unlikely(!p))
3372                         goto out_overflow;
3373                 *nlink = be32_to_cpup(p);
3374                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3375                 ret = NFS_ATTR_FATTR_NLINK;
3376         }
3377         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3378         return ret;
3379 out_overflow:
3380         print_overflow_msg(__func__, xdr);
3381         return -EIO;
3382 }
3383
3384 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3385                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3386 {
3387         uint32_t len;
3388         __be32 *p;
3389         int ret = 0;
3390
3391         *uid = -2;
3392         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3393                 return -EIO;
3394         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3395                 p = xdr_inline_decode(xdr, 4);
3396                 if (unlikely(!p))
3397                         goto out_overflow;
3398                 len = be32_to_cpup(p);
3399                 p = xdr_inline_decode(xdr, len);
3400                 if (unlikely(!p))
3401                         goto out_overflow;
3402                 if (!may_sleep) {
3403                         /* do nothing */
3404                 } else if (len < XDR_MAX_NETOBJ) {
3405                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3406                                 ret = NFS_ATTR_FATTR_OWNER;
3407                         else
3408                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3409                                                 __func__);
3410                 } else
3411                         dprintk("%s: name too long (%u)!\n",
3412                                         __func__, len);
3413                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3414         }
3415         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3416         return ret;
3417 out_overflow:
3418         print_overflow_msg(__func__, xdr);
3419         return -EIO;
3420 }
3421
3422 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3423                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3424 {
3425         uint32_t len;
3426         __be32 *p;
3427         int ret = 0;
3428
3429         *gid = -2;
3430         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3431                 return -EIO;
3432         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3433                 p = xdr_inline_decode(xdr, 4);
3434                 if (unlikely(!p))
3435                         goto out_overflow;
3436                 len = be32_to_cpup(p);
3437                 p = xdr_inline_decode(xdr, len);
3438                 if (unlikely(!p))
3439                         goto out_overflow;
3440                 if (!may_sleep) {
3441                         /* do nothing */
3442                 } else if (len < XDR_MAX_NETOBJ) {
3443                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3444                                 ret = NFS_ATTR_FATTR_GROUP;
3445                         else
3446                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3447                                                 __func__);
3448                 } else
3449                         dprintk("%s: name too long (%u)!\n",
3450                                         __func__, len);
3451                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3452         }
3453         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3454         return ret;
3455 out_overflow:
3456         print_overflow_msg(__func__, xdr);
3457         return -EIO;
3458 }
3459
3460 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3461 {
3462         uint32_t major = 0, minor = 0;
3463         __be32 *p;
3464         int ret = 0;
3465
3466         *rdev = MKDEV(0,0);
3467         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3468                 return -EIO;
3469         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3470                 dev_t tmp;
3471
3472                 p = xdr_inline_decode(xdr, 8);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 major = be32_to_cpup(p++);
3476                 minor = be32_to_cpup(p);
3477                 tmp = MKDEV(major, minor);
3478                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3479                         *rdev = tmp;
3480                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3481                 ret = NFS_ATTR_FATTR_RDEV;
3482         }
3483         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3484         return ret;
3485 out_overflow:
3486         print_overflow_msg(__func__, xdr);
3487         return -EIO;
3488 }
3489
3490 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3491 {
3492         __be32 *p;
3493         int status = 0;
3494
3495         *res = 0;
3496         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3497                 return -EIO;
3498         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3499                 p = xdr_inline_decode(xdr, 8);
3500                 if (unlikely(!p))
3501                         goto out_overflow;
3502                 xdr_decode_hyper(p, res);
3503                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3504         }
3505         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3506         return status;
3507 out_overflow:
3508         print_overflow_msg(__func__, xdr);
3509         return -EIO;
3510 }
3511
3512 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3513 {
3514         __be32 *p;
3515         int status = 0;
3516
3517         *res = 0;
3518         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3519                 return -EIO;
3520         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3521                 p = xdr_inline_decode(xdr, 8);
3522                 if (unlikely(!p))
3523                         goto out_overflow;
3524                 xdr_decode_hyper(p, res);
3525                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3526         }
3527         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3528         return status;
3529 out_overflow:
3530         print_overflow_msg(__func__, xdr);
3531         return -EIO;
3532 }
3533
3534 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3535 {
3536         __be32 *p;
3537         int status = 0;
3538
3539         *res = 0;
3540         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3541                 return -EIO;
3542         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3543                 p = xdr_inline_decode(xdr, 8);
3544                 if (unlikely(!p))
3545                         goto out_overflow;
3546                 xdr_decode_hyper(p, res);
3547                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3548         }
3549         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3550         return status;
3551 out_overflow:
3552         print_overflow_msg(__func__, xdr);
3553         return -EIO;
3554 }
3555
3556 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3557 {
3558         __be32 *p;
3559         int ret = 0;
3560
3561         *used = 0;
3562         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3563                 return -EIO;
3564         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3565                 p = xdr_inline_decode(xdr, 8);
3566                 if (unlikely(!p))
3567                         goto out_overflow;
3568                 xdr_decode_hyper(p, used);
3569                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3570                 ret = NFS_ATTR_FATTR_SPACE_USED;
3571         }
3572         dprintk("%s: space used=%Lu\n", __func__,
3573                         (unsigned long long)*used);
3574         return ret;
3575 out_overflow:
3576         print_overflow_msg(__func__, xdr);
3577         return -EIO;
3578 }
3579
3580 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3581 {
3582         __be32 *p;
3583         uint64_t sec;
3584         uint32_t nsec;
3585
3586         p = xdr_inline_decode(xdr, 12);
3587         if (unlikely(!p))
3588                 goto out_overflow;
3589         p = xdr_decode_hyper(p, &sec);
3590         nsec = be32_to_cpup(p);
3591         time->tv_sec = (time_t)sec;
3592         time->tv_nsec = (long)nsec;
3593         return 0;
3594 out_overflow:
3595         print_overflow_msg(__func__, xdr);
3596         return -EIO;
3597 }
3598
3599 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3600 {
3601         int status = 0;
3602
3603         time->tv_sec = 0;
3604         time->tv_nsec = 0;
3605         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3606                 return -EIO;
3607         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3608                 status = decode_attr_time(xdr, time);
3609                 if (status == 0)
3610                         status = NFS_ATTR_FATTR_ATIME;
3611                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3612         }
3613         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3614         return status;
3615 }
3616
3617 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3618 {
3619         int status = 0;
3620
3621         time->tv_sec = 0;
3622         time->tv_nsec = 0;
3623         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3624                 return -EIO;
3625         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3626                 status = decode_attr_time(xdr, time);
3627                 if (status == 0)
3628                         status = NFS_ATTR_FATTR_CTIME;
3629                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3630         }
3631         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3632         return status;
3633 }
3634
3635 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3636                                   struct timespec *time)
3637 {
3638         int status = 0;
3639
3640         time->tv_sec = 0;
3641         time->tv_nsec = 0;
3642         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3643                 return -EIO;
3644         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3645                 status = decode_attr_time(xdr, time);
3646                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3647         }
3648         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3649                 (long)time->tv_nsec);
3650         return status;
3651 }
3652
3653 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3654 {
3655         int status = 0;
3656
3657         time->tv_sec = 0;
3658         time->tv_nsec = 0;
3659         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3660                 return -EIO;
3661         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3662                 status = decode_attr_time(xdr, time);
3663                 if (status == 0)
3664                         status = NFS_ATTR_FATTR_MTIME;
3665                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3666         }
3667         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3668         return status;
3669 }
3670
3671 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3672 {
3673         unsigned int attrwords = XDR_QUADLEN(attrlen);
3674         unsigned int nwords = xdr->p - savep;
3675
3676         if (unlikely(attrwords != nwords)) {
3677                 dprintk("%s: server returned incorrect attribute length: "
3678                         "%u %c %u\n",
3679                                 __func__,
3680                                 attrwords << 2,
3681                                 (attrwords < nwords) ? '<' : '>',
3682                                 nwords << 2);
3683                 return -EIO;
3684         }
3685         return 0;
3686 }
3687
3688 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3689 {
3690         __be32 *p;
3691
3692         p = xdr_inline_decode(xdr, 20);
3693         if (unlikely(!p))
3694                 goto out_overflow;
3695         cinfo->atomic = be32_to_cpup(p++);
3696         p = xdr_decode_hyper(p, &cinfo->before);
3697         xdr_decode_hyper(p, &cinfo->after);
3698         return 0;
3699 out_overflow:
3700         print_overflow_msg(__func__, xdr);
3701         return -EIO;
3702 }
3703
3704 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3705 {
3706         __be32 *p;
3707         uint32_t supp, acc;
3708         int status;
3709
3710         status = decode_op_hdr(xdr, OP_ACCESS);
3711         if (status)
3712                 return status;
3713         p = xdr_inline_decode(xdr, 8);
3714         if (unlikely(!p))
3715                 goto out_overflow;
3716         supp = be32_to_cpup(p++);
3717         acc = be32_to_cpup(p);
3718         access->supported = supp;
3719         access->access = acc;
3720         return 0;
3721 out_overflow:
3722         print_overflow_msg(__func__, xdr);
3723         return -EIO;
3724 }
3725
3726 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3727 {
3728         __be32 *p;
3729
3730         p = xdr_inline_decode(xdr, len);
3731         if (likely(p)) {
3732                 memcpy(buf, p, len);
3733                 return 0;
3734         }
3735         print_overflow_msg(__func__, xdr);
3736         return -EIO;
3737 }
3738
3739 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3740 {
3741         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3742 }
3743
3744 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3745 {
3746         int status;
3747
3748         status = decode_op_hdr(xdr, OP_CLOSE);
3749         if (status != -EIO)
3750                 nfs_increment_open_seqid(status, res->seqid);
3751         if (!status)
3752                 status = decode_stateid(xdr, &res->stateid);
3753         return status;
3754 }
3755
3756 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3757 {
3758         return decode_opaque_fixed(xdr, verifier, 8);
3759 }
3760
3761 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3762 {
3763         int status;
3764
3765         status = decode_op_hdr(xdr, OP_COMMIT);
3766         if (!status)
3767                 status = decode_verifier(xdr, res->verf->verifier);
3768         return status;
3769 }
3770
3771 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3772 {
3773         __be32 *p;
3774         uint32_t bmlen;
3775         int status;
3776
3777         status = decode_op_hdr(xdr, OP_CREATE);
3778         if (status)
3779                 return status;
3780         if ((status = decode_change_info(xdr, cinfo)))
3781                 return status;
3782         p = xdr_inline_decode(xdr, 4);
3783         if (unlikely(!p))
3784                 goto out_overflow;
3785         bmlen = be32_to_cpup(p);
3786         p = xdr_inline_decode(xdr, bmlen << 2);
3787         if (likely(p))
3788                 return 0;
3789 out_overflow:
3790         print_overflow_msg(__func__, xdr);
3791         return -EIO;
3792 }
3793
3794 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3795 {
3796         __be32 *savep;
3797         uint32_t attrlen, bitmap[2] = {0};
3798         int status;
3799
3800         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3801                 goto xdr_error;
3802         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3803                 goto xdr_error;
3804         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3805                 goto xdr_error;
3806         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3807                 goto xdr_error;
3808         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3809                 goto xdr_error;
3810         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3811                 goto xdr_error;
3812         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3813                 goto xdr_error;
3814         status = verify_attr_len(xdr, savep, attrlen);
3815 xdr_error:
3816         dprintk("%s: xdr returned %d!\n", __func__, -status);
3817         return status;
3818 }
3819
3820 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3821 {
3822         __be32 *savep;
3823         uint32_t attrlen, bitmap[2] = {0};
3824         int status;
3825
3826         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3827                 goto xdr_error;
3828         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3829                 goto xdr_error;
3830         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3831                 goto xdr_error;
3832
3833         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3834                 goto xdr_error;
3835         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3836                 goto xdr_error;
3837         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3838                 goto xdr_error;
3839         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3840                 goto xdr_error;
3841         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3842                 goto xdr_error;
3843         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3844                 goto xdr_error;
3845
3846         status = verify_attr_len(xdr, savep, attrlen);
3847 xdr_error:
3848         dprintk("%s: xdr returned %d!\n", __func__, -status);
3849         return status;
3850 }
3851
3852 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3853 {
3854         __be32 *savep;
3855         uint32_t attrlen, bitmap[2] = {0};
3856         int status;
3857
3858         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3859                 goto xdr_error;
3860         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3861                 goto xdr_error;
3862         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3863                 goto xdr_error;
3864
3865         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3866                 goto xdr_error;
3867         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3868                 goto xdr_error;
3869
3870         status = verify_attr_len(xdr, savep, attrlen);
3871 xdr_error:
3872         dprintk("%s: xdr returned %d!\n", __func__, -status);
3873         return status;
3874 }
3875
3876 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3877                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3878                 const struct nfs_server *server, int may_sleep)
3879 {
3880         int status;
3881         umode_t fmode = 0;
3882         uint64_t fileid;
3883         uint32_t type;
3884
3885         status = decode_attr_type(xdr, bitmap, &type);
3886         if (status < 0)
3887                 goto xdr_error;
3888         fattr->mode = 0;
3889         if (status != 0) {
3890                 fattr->mode |= nfs_type2fmt[type];
3891                 fattr->valid |= status;
3892         }
3893
3894         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3895         if (status < 0)
3896                 goto xdr_error;
3897         fattr->valid |= status;
3898
3899         status = decode_attr_size(xdr, bitmap, &fattr->size);
3900         if (status < 0)
3901                 goto xdr_error;
3902         fattr->valid |= status;
3903
3904         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3905         if (status < 0)
3906                 goto xdr_error;
3907         fattr->valid |= status;
3908
3909         status = decode_attr_error(xdr, bitmap);
3910         if (status < 0)
3911                 goto xdr_error;
3912
3913         status = decode_attr_filehandle(xdr, bitmap, fh);
3914         if (status < 0)
3915                 goto xdr_error;
3916
3917         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3918         if (status < 0)
3919                 goto xdr_error;
3920         fattr->valid |= status;
3921
3922         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3923                                                 struct nfs4_fs_locations,
3924                                                 fattr));
3925         if (status < 0)
3926                 goto xdr_error;
3927         fattr->valid |= status;
3928
3929         status = decode_attr_mode(xdr, bitmap, &fmode);
3930         if (status < 0)
3931                 goto xdr_error;
3932         if (status != 0) {
3933                 fattr->mode |= fmode;
3934                 fattr->valid |= status;
3935         }
3936
3937         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3938         if (status < 0)
3939                 goto xdr_error;
3940         fattr->valid |= status;
3941
3942         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3943                         &fattr->uid, may_sleep);
3944         if (status < 0)
3945                 goto xdr_error;
3946         fattr->valid |= status;
3947
3948         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3949                         &fattr->gid, may_sleep);
3950         if (status < 0)
3951                 goto xdr_error;
3952         fattr->valid |= status;
3953
3954         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3955         if (status < 0)
3956                 goto xdr_error;
3957         fattr->valid |= status;
3958
3959         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3960         if (status < 0)
3961                 goto xdr_error;
3962         fattr->valid |= status;
3963
3964         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3965         if (status < 0)
3966                 goto xdr_error;
3967         fattr->valid |= status;
3968
3969         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3970         if (status < 0)
3971                 goto xdr_error;
3972         fattr->valid |= status;
3973
3974         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3975         if (status < 0)
3976                 goto xdr_error;
3977         fattr->valid |= status;
3978
3979         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3980         if (status < 0)
3981                 goto xdr_error;
3982         if (status != 0 && !(fattr->valid & status)) {
3983                 fattr->fileid = fileid;
3984                 fattr->valid |= status;
3985         }
3986
3987 xdr_error:
3988         dprintk("%s: xdr returned %d\n", __func__, -status);
3989         return status;
3990 }
3991
3992 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3993                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3994 {
3995         __be32 *savep;
3996         uint32_t attrlen,
3997                  bitmap[2] = {0};
3998         int status;
3999
4000         status = decode_op_hdr(xdr, OP_GETATTR);
4001         if (status < 0)
4002                 goto xdr_error;
4003
4004         status = decode_attr_bitmap(xdr, bitmap);
4005         if (status < 0)
4006                 goto xdr_error;
4007
4008         status = decode_attr_length(xdr, &attrlen, &savep);
4009         if (status < 0)
4010                 goto xdr_error;
4011
4012         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4013         if (status < 0)
4014                 goto xdr_error;
4015
4016         status = verify_attr_len(xdr, savep, attrlen);
4017 xdr_error:
4018         dprintk("%s: xdr returned %d\n", __func__, -status);
4019         return status;
4020 }
4021
4022 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4023                 const struct nfs_server *server, int may_sleep)
4024 {
4025         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4026 }
4027
4028 /*
4029  * Decode potentially multiple layout types. Currently we only support
4030  * one layout driver per file system.
4031  */
4032 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4033                                          uint32_t *layouttype)
4034 {
4035         uint32_t *p;
4036         int num;
4037
4038         p = xdr_inline_decode(xdr, 4);
4039         if (unlikely(!p))
4040                 goto out_overflow;
4041         num = be32_to_cpup(p);
4042
4043         /* pNFS is not supported by the underlying file system */
4044         if (num == 0) {
4045                 *layouttype = 0;
4046                 return 0;
4047         }
4048         if (num > 1)
4049                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4050                         "per filesystem not supported\n", __func__);
4051
4052         /* Decode and set first layout type, move xdr->p past unused types */
4053         p = xdr_inline_decode(xdr, num * 4);
4054         if (unlikely(!p))
4055                 goto out_overflow;
4056         *layouttype = be32_to_cpup(p);
4057         return 0;
4058 out_overflow:
4059         print_overflow_msg(__func__, xdr);
4060         return -EIO;
4061 }
4062
4063 /*
4064  * The type of file system exported.
4065  * Note we must ensure that layouttype is set in any non-error case.
4066  */
4067 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4068                                 uint32_t *layouttype)
4069 {
4070         int status = 0;
4071
4072         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4073         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4074                 return -EIO;
4075         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4076                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4077                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4078         } else
4079                 *layouttype = 0;
4080         return status;
4081 }
4082
4083 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4084 {
4085         __be32 *savep;
4086         uint32_t attrlen, bitmap[2];
4087         int status;
4088
4089         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4090                 goto xdr_error;
4091         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4092                 goto xdr_error;
4093         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4094                 goto xdr_error;
4095
4096         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4097
4098         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4099                 goto xdr_error;
4100         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4101                 goto xdr_error;
4102         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4103                 goto xdr_error;
4104         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4105         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4106                 goto xdr_error;
4107         fsinfo->wtpref = fsinfo->wtmax;
4108         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4109         if (status != 0)
4110                 goto xdr_error;
4111         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4112         if (status != 0)
4113                 goto xdr_error;
4114
4115         status = verify_attr_len(xdr, savep, attrlen);
4116 xdr_error:
4117         dprintk("%s: xdr returned %d!\n", __func__, -status);
4118         return status;
4119 }
4120
4121 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4122 {
4123         __be32 *p;
4124         uint32_t len;
4125         int status;
4126
4127         /* Zero handle first to allow comparisons */
4128         memset(fh, 0, sizeof(*fh));
4129
4130         status = decode_op_hdr(xdr, OP_GETFH);
4131         if (status)
4132                 return status;
4133
4134         p = xdr_inline_decode(xdr, 4);
4135         if (unlikely(!p))
4136                 goto out_overflow;
4137         len = be32_to_cpup(p);
4138         if (len > NFS4_FHSIZE)
4139                 return -EIO;
4140         fh->size = len;
4141         p = xdr_inline_decode(xdr, len);
4142         if (unlikely(!p))
4143                 goto out_overflow;
4144         memcpy(fh->data, p, len);
4145         return 0;
4146 out_overflow:
4147         print_overflow_msg(__func__, xdr);
4148         return -EIO;
4149 }
4150
4151 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4152 {
4153         int status;
4154
4155         status = decode_op_hdr(xdr, OP_LINK);
4156         if (status)
4157                 return status;
4158         return decode_change_info(xdr, cinfo);
4159 }
4160
4161 /*
4162  * We create the owner, so we know a proper owner.id length is 4.
4163  */
4164 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4165 {
4166         uint64_t offset, length, clientid;
4167         __be32 *p;
4168         uint32_t namelen, type;
4169
4170         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4171         if (unlikely(!p))
4172                 goto out_overflow;
4173         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4174         p = xdr_decode_hyper(p, &length);
4175         type = be32_to_cpup(p++); /* 4 byte read */
4176         if (fl != NULL) { /* manipulate file lock */
4177                 fl->fl_start = (loff_t)offset;
4178                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4179                 if (length == ~(uint64_t)0)
4180                         fl->fl_end = OFFSET_MAX;
4181                 fl->fl_type = F_WRLCK;
4182                 if (type & 1)
4183                         fl->fl_type = F_RDLCK;
4184                 fl->fl_pid = 0;
4185         }
4186         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4187         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4188         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4189         if (likely(p))
4190                 return -NFS4ERR_DENIED;
4191 out_overflow:
4192         print_overflow_msg(__func__, xdr);
4193         return -EIO;
4194 }
4195
4196 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4197 {
4198         int status;
4199
4200         status = decode_op_hdr(xdr, OP_LOCK);
4201         if (status == -EIO)
4202                 goto out;
4203         if (status == 0) {
4204                 status = decode_stateid(xdr, &res->stateid);
4205                 if (unlikely(status))
4206                         goto out;
4207         } else if (status == -NFS4ERR_DENIED)
4208                 status = decode_lock_denied(xdr, NULL);
4209         if (res->open_seqid != NULL)
4210                 nfs_increment_open_seqid(status, res->open_seqid);
4211         nfs_increment_lock_seqid(status, res->lock_seqid);
4212 out:
4213         return status;
4214 }
4215
4216 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4217 {
4218         int status;
4219         status = decode_op_hdr(xdr, OP_LOCKT);
4220         if (status == -NFS4ERR_DENIED)
4221                 return decode_lock_denied(xdr, res->denied);
4222         return status;
4223 }
4224
4225 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4226 {
4227         int status;
4228
4229         status = decode_op_hdr(xdr, OP_LOCKU);
4230         if (status != -EIO)
4231                 nfs_increment_lock_seqid(status, res->seqid);
4232         if (status == 0)
4233                 status = decode_stateid(xdr, &res->stateid);
4234         return status;
4235 }
4236
4237 static int decode_release_lockowner(struct xdr_stream *xdr)
4238 {
4239         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4240 }
4241
4242 static int decode_lookup(struct xdr_stream *xdr)
4243 {
4244         return decode_op_hdr(xdr, OP_LOOKUP);
4245 }
4246
4247 /* This is too sick! */
4248 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4249 {
4250         __be32 *p;
4251         uint32_t limit_type, nblocks, blocksize;
4252
4253         p = xdr_inline_decode(xdr, 12);
4254         if (unlikely(!p))
4255                 goto out_overflow;
4256         limit_type = be32_to_cpup(p++);
4257         switch (limit_type) {
4258         case 1:
4259                 xdr_decode_hyper(p, maxsize);
4260                 break;
4261         case 2:
4262                 nblocks = be32_to_cpup(p++);
4263                 blocksize = be32_to_cpup(p);
4264                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4265         }
4266         return 0;
4267 out_overflow:
4268         print_overflow_msg(__func__, xdr);
4269         return -EIO;
4270 }
4271
4272 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4273 {
4274         __be32 *p;
4275         uint32_t delegation_type;
4276         int status;
4277
4278         p = xdr_inline_decode(xdr, 4);
4279         if (unlikely(!p))
4280                 goto out_overflow;
4281         delegation_type = be32_to_cpup(p);
4282         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4283                 res->delegation_type = 0;
4284                 return 0;
4285         }
4286         status = decode_stateid(xdr, &res->delegation);
4287         if (unlikely(status))
4288                 return status;
4289         p = xdr_inline_decode(xdr, 4);
4290         if (unlikely(!p))
4291                 goto out_overflow;
4292         res->do_recall = be32_to_cpup(p);
4293
4294         switch (delegation_type) {
4295         case NFS4_OPEN_DELEGATE_READ:
4296                 res->delegation_type = FMODE_READ;
4297                 break;
4298         case NFS4_OPEN_DELEGATE_WRITE:
4299                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4300                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4301                                 return -EIO;
4302         }
4303         return decode_ace(xdr, NULL, res->server->nfs_client);
4304 out_overflow:
4305         print_overflow_msg(__func__, xdr);
4306         return -EIO;
4307 }
4308
4309 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4310 {
4311         __be32 *p;
4312         uint32_t savewords, bmlen, i;
4313         int status;
4314
4315         status = decode_op_hdr(xdr, OP_OPEN);
4316         if (status != -EIO)
4317                 nfs_increment_open_seqid(status, res->seqid);
4318         if (!status)
4319                 status = decode_stateid(xdr, &res->stateid);
4320         if (unlikely(status))
4321                 return status;
4322
4323         decode_change_info(xdr, &res->cinfo);
4324
4325         p = xdr_inline_decode(xdr, 8);
4326         if (unlikely(!p))
4327                 goto out_overflow;
4328         res->rflags = be32_to_cpup(p++);
4329         bmlen = be32_to_cpup(p);
4330         if (bmlen > 10)
4331                 goto xdr_error;
4332
4333         p = xdr_inline_decode(xdr, bmlen << 2);
4334         if (unlikely(!p))
4335                 goto out_overflow;
4336         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4337         for (i = 0; i < savewords; ++i)
4338                 res->attrset[i] = be32_to_cpup(p++);
4339         for (; i < NFS4_BITMAP_SIZE; i++)
4340                 res->attrset[i] = 0;
4341
4342         return decode_delegation(xdr, res);
4343 xdr_error:
4344         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4345         return -EIO;
4346 out_overflow:
4347         print_overflow_msg(__func__, xdr);
4348         return -EIO;
4349 }
4350
4351 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4352 {
4353         int status;
4354
4355         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4356         if (status != -EIO)
4357                 nfs_increment_open_seqid(status, res->seqid);
4358         if (!status)
4359                 status = decode_stateid(xdr, &res->stateid);
4360         return status;
4361 }
4362
4363 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4364 {
4365         int status;
4366
4367         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4368         if (status != -EIO)
4369                 nfs_increment_open_seqid(status, res->seqid);
4370         if (!status)
4371                 status = decode_stateid(xdr, &res->stateid);
4372         return status;
4373 }
4374
4375 static int decode_putfh(struct xdr_stream *xdr)
4376 {
4377         return decode_op_hdr(xdr, OP_PUTFH);
4378 }
4379
4380 static int decode_putrootfh(struct xdr_stream *xdr)
4381 {
4382         return decode_op_hdr(xdr, OP_PUTROOTFH);
4383 }
4384
4385 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4386 {
4387         struct kvec *iov = req->rq_rcv_buf.head;
4388         __be32 *p;
4389         uint32_t count, eof, recvd, hdrlen;
4390         int status;
4391
4392         status = decode_op_hdr(xdr, OP_READ);
4393         if (status)
4394                 return status;
4395         p = xdr_inline_decode(xdr, 8);
4396         if (unlikely(!p))
4397                 goto out_overflow;
4398         eof = be32_to_cpup(p++);
4399         count = be32_to_cpup(p);
4400         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4401         recvd = req->rq_rcv_buf.len - hdrlen;
4402         if (count > recvd) {
4403                 dprintk("NFS: server cheating in read reply: "
4404                                 "count %u > recvd %u\n", count, recvd);
4405                 count = recvd;
4406                 eof = 0;
4407         }
4408         xdr_read_pages(xdr, count);
4409         res->eof = eof;
4410         res->count = count;
4411         return 0;
4412 out_overflow:
4413         print_overflow_msg(__func__, xdr);
4414         return -EIO;
4415 }
4416
4417 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4418 {
4419         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4420         struct kvec     *iov = rcvbuf->head;
4421         size_t          hdrlen;
4422         u32             recvd, pglen = rcvbuf->page_len;
4423         int             status;
4424
4425         status = decode_op_hdr(xdr, OP_READDIR);
4426         if (!status)
4427                 status = decode_verifier(xdr, readdir->verifier.data);
4428         if (unlikely(status))
4429                 return status;
4430         dprintk("%s: verifier = %08x:%08x\n",
4431                         __func__,
4432                         ((u32 *)readdir->verifier.data)[0],
4433                         ((u32 *)readdir->verifier.data)[1]);
4434
4435
4436         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4437         recvd = rcvbuf->len - hdrlen;
4438         if (pglen > recvd)
4439                 pglen = recvd;
4440         xdr_read_pages(xdr, pglen);
4441
4442
4443         return pglen;
4444 }
4445
4446 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4447 {
4448         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4449         struct kvec *iov = rcvbuf->head;
4450         size_t hdrlen;
4451         u32 len, recvd;
4452         __be32 *p;
4453         int status;
4454
4455         status = decode_op_hdr(xdr, OP_READLINK);
4456         if (status)
4457                 return status;
4458
4459         /* Convert length of symlink */
4460         p = xdr_inline_decode(xdr, 4);
4461         if (unlikely(!p))
4462                 goto out_overflow;
4463         len = be32_to_cpup(p);
4464         if (len >= rcvbuf->page_len || len <= 0) {
4465                 dprintk("nfs: server returned giant symlink!\n");
4466                 return -ENAMETOOLONG;
4467         }
4468         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4469         recvd = req->rq_rcv_buf.len - hdrlen;
4470         if (recvd < len) {
4471                 dprintk("NFS: server cheating in readlink reply: "
4472                                 "count %u > recvd %u\n", len, recvd);
4473                 return -EIO;
4474         }
4475         xdr_read_pages(xdr, len);
4476         /*
4477          * The XDR encode routine has set things up so that
4478          * the link text will be copied directly into the
4479          * buffer.  We just have to do overflow-checking,
4480          * and and null-terminate the text (the VFS expects
4481          * null-termination).
4482          */
4483         xdr_terminate_string(rcvbuf, len);
4484         return 0;
4485 out_overflow:
4486         print_overflow_msg(__func__, xdr);
4487         return -EIO;
4488 }
4489
4490 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4491 {
4492         int status;
4493
4494         status = decode_op_hdr(xdr, OP_REMOVE);
4495         if (status)
4496                 goto out;
4497         status = decode_change_info(xdr, cinfo);
4498 out:
4499         return status;
4500 }
4501
4502 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4503               struct nfs4_change_info *new_cinfo)
4504 {
4505         int status;
4506
4507         status = decode_op_hdr(xdr, OP_RENAME);
4508         if (status)
4509                 goto out;
4510         if ((status = decode_change_info(xdr, old_cinfo)))
4511                 goto out;
4512         status = decode_change_info(xdr, new_cinfo);
4513 out:
4514         return status;
4515 }
4516
4517 static int decode_renew(struct xdr_stream *xdr)
4518 {
4519         return decode_op_hdr(xdr, OP_RENEW);
4520 }
4521
4522 static int
4523 decode_restorefh(struct xdr_stream *xdr)
4524 {
4525         return decode_op_hdr(xdr, OP_RESTOREFH);
4526 }
4527
4528 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4529                 size_t *acl_len)
4530 {
4531         __be32 *savep;
4532         uint32_t attrlen,
4533                  bitmap[2] = {0};
4534         struct kvec *iov = req->rq_rcv_buf.head;
4535         int status;
4536
4537         *acl_len = 0;
4538         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4539                 goto out;
4540         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4541                 goto out;
4542         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4543                 goto out;
4544
4545         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4546                 return -EIO;
4547         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4548                 size_t hdrlen;
4549                 u32 recvd;
4550
4551                 /* We ignore &savep and don't do consistency checks on
4552                  * the attr length.  Let userspace figure it out.... */
4553                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4554                 recvd = req->rq_rcv_buf.len - hdrlen;
4555                 if (attrlen > recvd) {
4556                         dprintk("NFS: server cheating in getattr"
4557                                         " acl reply: attrlen %u > recvd %u\n",
4558                                         attrlen, recvd);
4559                         return -EINVAL;
4560                 }
4561                 xdr_read_pages(xdr, attrlen);
4562                 *acl_len = attrlen;
4563         } else
4564                 status = -EOPNOTSUPP;
4565
4566 out:
4567         return status;
4568 }
4569
4570 static int
4571 decode_savefh(struct xdr_stream *xdr)
4572 {
4573         return decode_op_hdr(xdr, OP_SAVEFH);
4574 }
4575
4576 static int decode_setattr(struct xdr_stream *xdr)
4577 {
4578         __be32 *p;
4579         uint32_t bmlen;
4580         int status;
4581
4582         status = decode_op_hdr(xdr, OP_SETATTR);
4583         if (status)
4584                 return status;
4585         p = xdr_inline_decode(xdr, 4);
4586         if (unlikely(!p))
4587                 goto out_overflow;
4588         bmlen = be32_to_cpup(p);
4589         p = xdr_inline_decode(xdr, bmlen << 2);
4590         if (likely(p))
4591                 return 0;
4592 out_overflow:
4593         print_overflow_msg(__func__, xdr);
4594         return -EIO;
4595 }
4596
4597 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4598 {
4599         __be32 *p;
4600         uint32_t opnum;
4601         int32_t nfserr;
4602
4603         p = xdr_inline_decode(xdr, 8);
4604         if (unlikely(!p))
4605                 goto out_overflow;
4606         opnum = be32_to_cpup(p++);
4607         if (opnum != OP_SETCLIENTID) {
4608                 dprintk("nfs: decode_setclientid: Server returned operation"
4609                         " %d\n", opnum);
4610                 return -EIO;
4611         }
4612         nfserr = be32_to_cpup(p);
4613         if (nfserr == NFS_OK) {
4614                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4615                 if (unlikely(!p))
4616                         goto out_overflow;
4617                 p = xdr_decode_hyper(p, &res->clientid);
4618                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4619         } else if (nfserr == NFSERR_CLID_INUSE) {
4620                 uint32_t len;
4621
4622                 /* skip netid string */
4623                 p = xdr_inline_decode(xdr, 4);
4624                 if (unlikely(!p))
4625                         goto out_overflow;
4626                 len = be32_to_cpup(p);
4627                 p = xdr_inline_decode(xdr, len);
4628                 if (unlikely(!p))
4629                         goto out_overflow;
4630
4631                 /* skip uaddr string */
4632                 p = xdr_inline_decode(xdr, 4);
4633                 if (unlikely(!p))
4634                         goto out_overflow;
4635                 len = be32_to_cpup(p);
4636                 p = xdr_inline_decode(xdr, len);
4637                 if (unlikely(!p))
4638                         goto out_overflow;
4639                 return -NFSERR_CLID_INUSE;
4640         } else
4641                 return nfs4_stat_to_errno(nfserr);
4642
4643         return 0;
4644 out_overflow:
4645         print_overflow_msg(__func__, xdr);
4646         return -EIO;
4647 }
4648
4649 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4650 {
4651         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4652 }
4653
4654 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4655 {
4656         __be32 *p;
4657         int status;
4658
4659         status = decode_op_hdr(xdr, OP_WRITE);
4660         if (status)
4661                 return status;
4662
4663         p = xdr_inline_decode(xdr, 16);
4664         if (unlikely(!p))
4665                 goto out_overflow;
4666         res->count = be32_to_cpup(p++);
4667         res->verf->committed = be32_to_cpup(p++);
4668         memcpy(res->verf->verifier, p, 8);
4669         return 0;
4670 out_overflow:
4671         print_overflow_msg(__func__, xdr);
4672         return -EIO;
4673 }
4674
4675 static int decode_delegreturn(struct xdr_stream *xdr)
4676 {
4677         return decode_op_hdr(xdr, OP_DELEGRETURN);
4678 }
4679
4680 #if defined(CONFIG_NFS_V4_1)
4681 static int decode_exchange_id(struct xdr_stream *xdr,
4682                               struct nfs41_exchange_id_res *res)
4683 {
4684         __be32 *p;
4685         uint32_t dummy;
4686         char *dummy_str;
4687         int status;
4688         struct nfs_client *clp = res->client;
4689
4690         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4691         if (status)
4692                 return status;
4693
4694         p = xdr_inline_decode(xdr, 8);
4695         if (unlikely(!p))
4696                 goto out_overflow;
4697         xdr_decode_hyper(p, &clp->cl_ex_clid);
4698         p = xdr_inline_decode(xdr, 12);
4699         if (unlikely(!p))
4700                 goto out_overflow;
4701         clp->cl_seqid = be32_to_cpup(p++);
4702         clp->cl_exchange_flags = be32_to_cpup(p++);
4703
4704         /* We ask for SP4_NONE */
4705         dummy = be32_to_cpup(p);
4706         if (dummy != SP4_NONE)
4707                 return -EIO;
4708
4709         /* Throw away minor_id */
4710         p = xdr_inline_decode(xdr, 8);
4711         if (unlikely(!p))
4712                 goto out_overflow;
4713
4714         /* Throw away Major id */
4715         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4716         if (unlikely(status))
4717                 return status;
4718
4719         /* Throw away server_scope */
4720         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4721         if (unlikely(status))
4722                 return status;
4723
4724         /* Throw away Implementation id array */
4725         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4726         if (unlikely(status))
4727                 return status;
4728
4729         return 0;
4730 out_overflow:
4731         print_overflow_msg(__func__, xdr);
4732         return -EIO;
4733 }
4734
4735 static int decode_chan_attrs(struct xdr_stream *xdr,
4736                              struct nfs4_channel_attrs *attrs)
4737 {
4738         __be32 *p;
4739         u32 nr_attrs;
4740
4741         p = xdr_inline_decode(xdr, 28);
4742         if (unlikely(!p))
4743                 goto out_overflow;
4744         attrs->headerpadsz = be32_to_cpup(p++);
4745         attrs->max_rqst_sz = be32_to_cpup(p++);
4746         attrs->max_resp_sz = be32_to_cpup(p++);
4747         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4748         attrs->max_ops = be32_to_cpup(p++);
4749         attrs->max_reqs = be32_to_cpup(p++);
4750         nr_attrs = be32_to_cpup(p);
4751         if (unlikely(nr_attrs > 1)) {
4752                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4753                         __func__, nr_attrs);
4754                 return -EINVAL;
4755         }
4756         if (nr_attrs == 1) {
4757                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4758                 if (unlikely(!p))
4759                         goto out_overflow;
4760         }
4761         return 0;
4762 out_overflow:
4763         print_overflow_msg(__func__, xdr);
4764         return -EIO;
4765 }
4766
4767 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4768 {
4769         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4770 }
4771
4772 static int decode_create_session(struct xdr_stream *xdr,
4773                                  struct nfs41_create_session_res *res)
4774 {
4775         __be32 *p;
4776         int status;
4777         struct nfs_client *clp = res->client;
4778         struct nfs4_session *session = clp->cl_session;
4779
4780         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4781         if (!status)
4782                 status = decode_sessionid(xdr, &session->sess_id);
4783         if (unlikely(status))
4784                 return status;
4785
4786         /* seqid, flags */
4787         p = xdr_inline_decode(xdr, 8);
4788         if (unlikely(!p))
4789                 goto out_overflow;
4790         clp->cl_seqid = be32_to_cpup(p++);
4791         session->flags = be32_to_cpup(p);
4792
4793         /* Channel attributes */
4794         status = decode_chan_attrs(xdr, &session->fc_attrs);
4795         if (!status)
4796                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4797         return status;
4798 out_overflow:
4799         print_overflow_msg(__func__, xdr);
4800         return -EIO;
4801 }
4802
4803 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4804 {
4805         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4806 }
4807
4808 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4809 {
4810         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4811 }
4812 #endif /* CONFIG_NFS_V4_1 */
4813
4814 static int decode_sequence(struct xdr_stream *xdr,
4815                            struct nfs4_sequence_res *res,
4816                            struct rpc_rqst *rqstp)
4817 {
4818 #if defined(CONFIG_NFS_V4_1)
4819         struct nfs4_sessionid id;
4820         u32 dummy;
4821         int status;
4822         __be32 *p;
4823
4824         if (!res->sr_session)
4825                 return 0;
4826
4827         status = decode_op_hdr(xdr, OP_SEQUENCE);
4828         if (!status)
4829                 status = decode_sessionid(xdr, &id);
4830         if (unlikely(status))
4831                 goto out_err;
4832
4833         /*
4834          * If the server returns different values for sessionID, slotID or
4835          * sequence number, the server is looney tunes.
4836          */
4837         status = -EREMOTEIO;
4838
4839         if (memcmp(id.data, res->sr_session->sess_id.data,
4840                    NFS4_MAX_SESSIONID_LEN)) {
4841                 dprintk("%s Invalid session id\n", __func__);
4842                 goto out_err;
4843         }
4844
4845         p = xdr_inline_decode(xdr, 20);
4846         if (unlikely(!p))
4847                 goto out_overflow;
4848
4849         /* seqid */
4850         dummy = be32_to_cpup(p++);
4851         if (dummy != res->sr_slot->seq_nr) {
4852                 dprintk("%s Invalid sequence number\n", __func__);
4853                 goto out_err;
4854         }
4855         /* slot id */
4856         dummy = be32_to_cpup(p++);
4857         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4858                 dprintk("%s Invalid slot id\n", __func__);
4859                 goto out_err;
4860         }
4861         /* highest slot id - currently not processed */
4862         dummy = be32_to_cpup(p++);
4863         /* target highest slot id - currently not processed */
4864         dummy = be32_to_cpup(p++);
4865         /* result flags */
4866         res->sr_status_flags = be32_to_cpup(p);
4867         status = 0;
4868 out_err:
4869         res->sr_status = status;
4870         return status;
4871 out_overflow:
4872         print_overflow_msg(__func__, xdr);
4873         status = -EIO;
4874         goto out_err;
4875 #else  /* CONFIG_NFS_V4_1 */
4876         return 0;
4877 #endif /* CONFIG_NFS_V4_1 */
4878 }
4879
4880 #if defined(CONFIG_NFS_V4_1)
4881
4882 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4883                                 struct pnfs_device *pdev)
4884 {
4885         __be32 *p;
4886         uint32_t len, type;
4887         int status;
4888
4889         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4890         if (status) {
4891                 if (status == -ETOOSMALL) {
4892                         p = xdr_inline_decode(xdr, 4);
4893                         if (unlikely(!p))
4894                                 goto out_overflow;
4895                         pdev->mincount = be32_to_cpup(p);
4896                         dprintk("%s: Min count too small. mincnt = %u\n",
4897                                 __func__, pdev->mincount);
4898                 }
4899                 return status;
4900         }
4901
4902         p = xdr_inline_decode(xdr, 8);
4903         if (unlikely(!p))
4904                 goto out_overflow;
4905         type = be32_to_cpup(p++);
4906         if (type != pdev->layout_type) {
4907                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4908                         __func__, pdev->layout_type, type);
4909                 return -EINVAL;
4910         }
4911         /*
4912          * Get the length of the opaque device_addr4. xdr_read_pages places
4913          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4914          * and places the remaining xdr data in xdr_buf->tail
4915          */
4916         pdev->mincount = be32_to_cpup(p);
4917         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4918
4919         /* Parse notification bitmap, verifying that it is zero. */
4920         p = xdr_inline_decode(xdr, 4);
4921         if (unlikely(!p))
4922                 goto out_overflow;
4923         len = be32_to_cpup(p);
4924         if (len) {
4925                 uint32_t i;
4926
4927                 p = xdr_inline_decode(xdr, 4 * len);
4928                 if (unlikely(!p))
4929                         goto out_overflow;
4930                 for (i = 0; i < len; i++, p++) {
4931                         if (be32_to_cpup(p)) {
4932                                 dprintk("%s: notifications not supported\n",
4933                                         __func__);
4934                                 return -EIO;
4935                         }
4936                 }
4937         }
4938         return 0;
4939 out_overflow:
4940         print_overflow_msg(__func__, xdr);
4941         return -EIO;
4942 }
4943
4944 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
4945                             struct nfs4_layoutget_res *res)
4946 {
4947         __be32 *p;
4948         int status;
4949         u32 layout_count;
4950
4951         status = decode_op_hdr(xdr, OP_LAYOUTGET);
4952         if (status)
4953                 return status;
4954         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
4955         if (unlikely(!p))
4956                 goto out_overflow;
4957         res->return_on_close = be32_to_cpup(p++);
4958         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
4959         layout_count = be32_to_cpup(p);
4960         if (!layout_count) {
4961                 dprintk("%s: server responded with empty layout array\n",
4962                         __func__);
4963                 return -EINVAL;
4964         }
4965
4966         p = xdr_inline_decode(xdr, 24);
4967         if (unlikely(!p))
4968                 goto out_overflow;
4969         p = xdr_decode_hyper(p, &res->range.offset);
4970         p = xdr_decode_hyper(p, &res->range.length);
4971         res->range.iomode = be32_to_cpup(p++);
4972         res->type = be32_to_cpup(p++);
4973
4974         status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
4975         if (unlikely(status))
4976                 return status;
4977
4978         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
4979                 __func__,
4980                 (unsigned long)res->range.offset,
4981                 (unsigned long)res->range.length,
4982                 res->range.iomode,
4983                 res->type,
4984                 res->layout.len);
4985
4986         /* nfs4_proc_layoutget allocated a single page */
4987         if (res->layout.len > PAGE_SIZE)
4988                 return -ENOMEM;
4989         memcpy(res->layout.buf, p, res->layout.len);
4990
4991         if (layout_count > 1) {
4992                 /* We only handle a length one array at the moment.  Any
4993                  * further entries are just ignored.  Note that this means
4994                  * the client may see a response that is less than the
4995                  * minimum it requested.
4996                  */
4997                 dprintk("%s: server responded with %d layouts, dropping tail\n",
4998                         __func__, layout_count);
4999         }
5000
5001         return 0;
5002 out_overflow:
5003         print_overflow_msg(__func__, xdr);
5004         return -EIO;
5005 }
5006 #endif /* CONFIG_NFS_V4_1 */
5007
5008 /*
5009  * END OF "GENERIC" DECODE ROUTINES.
5010  */
5011
5012 /*
5013  * Decode OPEN_DOWNGRADE response
5014  */
5015 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5016                                        struct xdr_stream *xdr,
5017                                        struct nfs_closeres *res)
5018 {
5019         struct compound_hdr hdr;
5020         int status;
5021
5022         status = decode_compound_hdr(xdr, &hdr);
5023         if (status)
5024                 goto out;
5025         status = decode_sequence(xdr, &res->seq_res, rqstp);
5026         if (status)
5027                 goto out;
5028         status = decode_putfh(xdr);
5029         if (status)
5030                 goto out;
5031         status = decode_open_downgrade(xdr, res);
5032         if (status != 0)
5033                 goto out;
5034         decode_getfattr(xdr, res->fattr, res->server,
5035                         !RPC_IS_ASYNC(rqstp->rq_task));
5036 out:
5037         return status;
5038 }
5039
5040 /*
5041  * Decode ACCESS response
5042  */
5043 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5044                                struct nfs4_accessres *res)
5045 {
5046         struct compound_hdr hdr;
5047         int status;
5048
5049         status = decode_compound_hdr(xdr, &hdr);
5050         if (status)
5051                 goto out;
5052         status = decode_sequence(xdr, &res->seq_res, rqstp);
5053         if (status)
5054                 goto out;
5055         status = decode_putfh(xdr);
5056         if (status != 0)
5057                 goto out;
5058         status = decode_access(xdr, res);
5059         if (status != 0)
5060                 goto out;
5061         decode_getfattr(xdr, res->fattr, res->server,
5062                         !RPC_IS_ASYNC(rqstp->rq_task));
5063 out:
5064         return status;
5065 }
5066
5067 /*
5068  * Decode LOOKUP response
5069  */
5070 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5071                                struct nfs4_lookup_res *res)
5072 {
5073         struct compound_hdr hdr;
5074         int status;
5075
5076         status = decode_compound_hdr(xdr, &hdr);
5077         if (status)
5078                 goto out;
5079         status = decode_sequence(xdr, &res->seq_res, rqstp);
5080         if (status)
5081                 goto out;
5082         status = decode_putfh(xdr);
5083         if (status)
5084                 goto out;
5085         status = decode_lookup(xdr);
5086         if (status)
5087                 goto out;
5088         status = decode_getfh(xdr, res->fh);
5089         if (status)
5090                 goto out;
5091         status = decode_getfattr(xdr, res->fattr, res->server
5092                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5093 out:
5094         return status;
5095 }
5096
5097 /*
5098  * Decode LOOKUP_ROOT response
5099  */
5100 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5101                                     struct xdr_stream *xdr,
5102                                     struct nfs4_lookup_res *res)
5103 {
5104         struct compound_hdr hdr;
5105         int status;
5106
5107         status = decode_compound_hdr(xdr, &hdr);
5108         if (status)
5109                 goto out;
5110         status = decode_sequence(xdr, &res->seq_res, rqstp);
5111         if (status)
5112                 goto out;
5113         status = decode_putrootfh(xdr);
5114         if (status)
5115                 goto out;
5116         status = decode_getfh(xdr, res->fh);
5117         if (status == 0)
5118                 status = decode_getfattr(xdr, res->fattr, res->server,
5119                                 !RPC_IS_ASYNC(rqstp->rq_task));
5120 out:
5121         return status;
5122 }
5123
5124 /*
5125  * Decode REMOVE response
5126  */
5127 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5128                                struct nfs_removeres *res)
5129 {
5130         struct compound_hdr hdr;
5131         int status;
5132
5133         status = decode_compound_hdr(xdr, &hdr);
5134         if (status)
5135                 goto out;
5136         status = decode_sequence(xdr, &res->seq_res, rqstp);
5137         if (status)
5138                 goto out;
5139         status = decode_putfh(xdr);
5140         if (status)
5141                 goto out;
5142         status = decode_remove(xdr, &res->cinfo);
5143         if (status)
5144                 goto out;
5145         decode_getfattr(xdr, res->dir_attr, res->server,
5146                         !RPC_IS_ASYNC(rqstp->rq_task));
5147 out:
5148         return status;
5149 }
5150
5151 /*
5152  * Decode RENAME response
5153  */
5154 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5155                                struct nfs_renameres *res)
5156 {
5157         struct compound_hdr hdr;
5158         int status;
5159
5160         status = decode_compound_hdr(xdr, &hdr);
5161         if (status)
5162                 goto out;
5163         status = decode_sequence(xdr, &res->seq_res, rqstp);
5164         if (status)
5165                 goto out;
5166         status = decode_putfh(xdr);
5167         if (status)
5168                 goto out;
5169         status = decode_savefh(xdr);
5170         if (status)
5171                 goto out;
5172         status = decode_putfh(xdr);
5173         if (status)
5174                 goto out;
5175         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5176         if (status)
5177                 goto out;
5178         /* Current FH is target directory */
5179         if (decode_getfattr(xdr, res->new_fattr, res->server,
5180                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5181                 goto out;
5182         status = decode_restorefh(xdr);
5183         if (status)
5184                 goto out;
5185         decode_getfattr(xdr, res->old_fattr, res->server,
5186                         !RPC_IS_ASYNC(rqstp->rq_task));
5187 out:
5188         return status;
5189 }
5190
5191 /*
5192  * Decode LINK response
5193  */
5194 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5195                              struct nfs4_link_res *res)
5196 {
5197         struct compound_hdr hdr;
5198         int status;
5199
5200         status = decode_compound_hdr(xdr, &hdr);
5201         if (status)
5202                 goto out;
5203         status = decode_sequence(xdr, &res->seq_res, rqstp);
5204         if (status)
5205                 goto out;
5206         status = decode_putfh(xdr);
5207         if (status)
5208                 goto out;
5209         status = decode_savefh(xdr);
5210         if (status)
5211                 goto out;
5212         status = decode_putfh(xdr);
5213         if (status)
5214                 goto out;
5215         status = decode_link(xdr, &res->cinfo);
5216         if (status)
5217                 goto out;
5218         /*
5219          * Note order: OP_LINK leaves the directory as the current
5220          *             filehandle.
5221          */
5222         if (decode_getfattr(xdr, res->dir_attr, res->server,
5223                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5224                 goto out;
5225         status = decode_restorefh(xdr);
5226         if (status)
5227                 goto out;
5228         decode_getfattr(xdr, res->fattr, res->server,
5229                         !RPC_IS_ASYNC(rqstp->rq_task));
5230 out:
5231         return status;
5232 }
5233
5234 /*
5235  * Decode CREATE response
5236  */
5237 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5238                                struct nfs4_create_res *res)
5239 {
5240         struct compound_hdr hdr;
5241         int status;
5242
5243         status = decode_compound_hdr(xdr, &hdr);
5244         if (status)
5245                 goto out;
5246         status = decode_sequence(xdr, &res->seq_res, rqstp);
5247         if (status)
5248                 goto out;
5249         status = decode_putfh(xdr);
5250         if (status)
5251                 goto out;
5252         status = decode_savefh(xdr);
5253         if (status)
5254                 goto out;
5255         status = decode_create(xdr, &res->dir_cinfo);
5256         if (status)
5257                 goto out;
5258         status = decode_getfh(xdr, res->fh);
5259         if (status)
5260                 goto out;
5261         if (decode_getfattr(xdr, res->fattr, res->server,
5262                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5263                 goto out;
5264         status = decode_restorefh(xdr);
5265         if (status)
5266                 goto out;
5267         decode_getfattr(xdr, res->dir_fattr, res->server,
5268                         !RPC_IS_ASYNC(rqstp->rq_task));
5269 out:
5270         return status;
5271 }
5272
5273 /*
5274  * Decode SYMLINK response
5275  */
5276 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5277                                 struct nfs4_create_res *res)
5278 {
5279         return nfs4_xdr_dec_create(rqstp, xdr, res);
5280 }
5281
5282 /*
5283  * Decode GETATTR response
5284  */
5285 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5286                                 struct nfs4_getattr_res *res)
5287 {
5288         struct compound_hdr hdr;
5289         int status;
5290
5291         status = decode_compound_hdr(xdr, &hdr);
5292         if (status)
5293                 goto out;
5294         status = decode_sequence(xdr, &res->seq_res, rqstp);
5295         if (status)
5296                 goto out;
5297         status = decode_putfh(xdr);
5298         if (status)
5299                 goto out;
5300         status = decode_getfattr(xdr, res->fattr, res->server,
5301                         !RPC_IS_ASYNC(rqstp->rq_task));
5302 out:
5303         return status;
5304 }
5305
5306 /*
5307  * Encode an SETACL request
5308  */
5309 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5310                                 struct nfs_setaclargs *args)
5311 {
5312         struct compound_hdr hdr = {
5313                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5314         };
5315
5316         encode_compound_hdr(xdr, req, &hdr);
5317         encode_sequence(xdr, &args->seq_args, &hdr);
5318         encode_putfh(xdr, args->fh, &hdr);
5319         encode_setacl(xdr, args, &hdr);
5320         encode_nops(&hdr);
5321 }
5322
5323 /*
5324  * Decode SETACL response
5325  */
5326 static int
5327 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5328                     struct nfs_setaclres *res)
5329 {
5330         struct compound_hdr hdr;
5331         int status;
5332
5333         status = decode_compound_hdr(xdr, &hdr);
5334         if (status)
5335                 goto out;
5336         status = decode_sequence(xdr, &res->seq_res, rqstp);
5337         if (status)
5338                 goto out;
5339         status = decode_putfh(xdr);
5340         if (status)
5341                 goto out;
5342         status = decode_setattr(xdr);
5343 out:
5344         return status;
5345 }
5346
5347 /*
5348  * Decode GETACL response
5349  */
5350 static int
5351 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5352                     struct nfs_getaclres *res)
5353 {
5354         struct compound_hdr hdr;
5355         int status;
5356
5357         status = decode_compound_hdr(xdr, &hdr);
5358         if (status)
5359                 goto out;
5360         status = decode_sequence(xdr, &res->seq_res, rqstp);
5361         if (status)
5362                 goto out;
5363         status = decode_putfh(xdr);
5364         if (status)
5365                 goto out;
5366         status = decode_getacl(xdr, rqstp, &res->acl_len);
5367
5368 out:
5369         return status;
5370 }
5371
5372 /*
5373  * Decode CLOSE response
5374  */
5375 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5376                               struct nfs_closeres *res)
5377 {
5378         struct compound_hdr hdr;
5379         int status;
5380
5381         status = decode_compound_hdr(xdr, &hdr);
5382         if (status)
5383                 goto out;
5384         status = decode_sequence(xdr, &res->seq_res, rqstp);
5385         if (status)
5386                 goto out;
5387         status = decode_putfh(xdr);
5388         if (status)
5389                 goto out;
5390         status = decode_close(xdr, res);
5391         if (status != 0)
5392                 goto out;
5393         /*
5394          * Note: Server may do delete on close for this file
5395          *      in which case the getattr call will fail with
5396          *      an ESTALE error. Shouldn't be a problem,
5397          *      though, since fattr->valid will remain unset.
5398          */
5399         decode_getfattr(xdr, res->fattr, res->server,
5400                         !RPC_IS_ASYNC(rqstp->rq_task));
5401 out:
5402         return status;
5403 }
5404
5405 /*
5406  * Decode OPEN response
5407  */
5408 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5409                              struct nfs_openres *res)
5410 {
5411         struct compound_hdr hdr;
5412         int status;
5413
5414         status = decode_compound_hdr(xdr, &hdr);
5415         if (status)
5416                 goto out;
5417         status = decode_sequence(xdr, &res->seq_res, rqstp);
5418         if (status)
5419                 goto out;
5420         status = decode_putfh(xdr);
5421         if (status)
5422                 goto out;
5423         status = decode_savefh(xdr);
5424         if (status)
5425                 goto out;
5426         status = decode_open(xdr, res);
5427         if (status)
5428                 goto out;
5429         if (decode_getfh(xdr, &res->fh) != 0)
5430                 goto out;
5431         if (decode_getfattr(xdr, res->f_attr, res->server,
5432                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5433                 goto out;
5434         if (decode_restorefh(xdr) != 0)
5435                 goto out;
5436         decode_getfattr(xdr, res->dir_attr, res->server,
5437                         !RPC_IS_ASYNC(rqstp->rq_task));
5438 out:
5439         return status;
5440 }
5441
5442 /*
5443  * Decode OPEN_CONFIRM response
5444  */
5445 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5446                                      struct xdr_stream *xdr,
5447                                      struct nfs_open_confirmres *res)
5448 {
5449         struct compound_hdr hdr;
5450         int status;
5451
5452         status = decode_compound_hdr(xdr, &hdr);
5453         if (status)
5454                 goto out;
5455         status = decode_putfh(xdr);
5456         if (status)
5457                 goto out;
5458         status = decode_open_confirm(xdr, res);
5459 out:
5460         return status;
5461 }
5462
5463 /*
5464  * Decode OPEN response
5465  */
5466 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5467                                     struct xdr_stream *xdr,
5468                                     struct nfs_openres *res)
5469 {
5470         struct compound_hdr hdr;
5471         int status;
5472
5473         status = decode_compound_hdr(xdr, &hdr);
5474         if (status)
5475                 goto out;
5476         status = decode_sequence(xdr, &res->seq_res, rqstp);
5477         if (status)
5478                 goto out;
5479         status = decode_putfh(xdr);
5480         if (status)
5481                 goto out;
5482         status = decode_open(xdr, res);
5483         if (status)
5484                 goto out;
5485         decode_getfattr(xdr, res->f_attr, res->server,
5486                         !RPC_IS_ASYNC(rqstp->rq_task));
5487 out:
5488         return status;
5489 }
5490
5491 /*
5492  * Decode SETATTR response
5493  */
5494 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5495                                 struct xdr_stream *xdr,
5496                                 struct nfs_setattrres *res)
5497 {
5498         struct compound_hdr hdr;
5499         int status;
5500
5501         status = decode_compound_hdr(xdr, &hdr);
5502         if (status)
5503                 goto out;
5504         status = decode_sequence(xdr, &res->seq_res, rqstp);
5505         if (status)
5506                 goto out;
5507         status = decode_putfh(xdr);
5508         if (status)
5509                 goto out;
5510         status = decode_setattr(xdr);
5511         if (status)
5512                 goto out;
5513         decode_getfattr(xdr, res->fattr, res->server,
5514                         !RPC_IS_ASYNC(rqstp->rq_task));
5515 out:
5516         return status;
5517 }
5518
5519 /*
5520  * Decode LOCK response
5521  */
5522 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5523                              struct nfs_lock_res *res)
5524 {
5525         struct compound_hdr hdr;
5526         int status;
5527
5528         status = decode_compound_hdr(xdr, &hdr);
5529         if (status)
5530                 goto out;
5531         status = decode_sequence(xdr, &res->seq_res, rqstp);
5532         if (status)
5533                 goto out;
5534         status = decode_putfh(xdr);
5535         if (status)
5536                 goto out;
5537         status = decode_lock(xdr, res);
5538 out:
5539         return status;
5540 }
5541
5542 /*
5543  * Decode LOCKT response
5544  */
5545 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5546                               struct nfs_lockt_res *res)
5547 {
5548         struct compound_hdr hdr;
5549         int status;
5550
5551         status = decode_compound_hdr(xdr, &hdr);
5552         if (status)
5553                 goto out;
5554         status = decode_sequence(xdr, &res->seq_res, rqstp);
5555         if (status)
5556                 goto out;
5557         status = decode_putfh(xdr);
5558         if (status)
5559                 goto out;
5560         status = decode_lockt(xdr, res);
5561 out:
5562         return status;
5563 }
5564
5565 /*
5566  * Decode LOCKU response
5567  */
5568 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5569                               struct nfs_locku_res *res)
5570 {
5571         struct compound_hdr hdr;
5572         int status;
5573
5574         status = decode_compound_hdr(xdr, &hdr);
5575         if (status)
5576                 goto out;
5577         status = decode_sequence(xdr, &res->seq_res, rqstp);
5578         if (status)
5579                 goto out;
5580         status = decode_putfh(xdr);
5581         if (status)
5582                 goto out;
5583         status = decode_locku(xdr, res);
5584 out:
5585         return status;
5586 }
5587
5588 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5589                                           struct xdr_stream *xdr, void *dummy)
5590 {
5591         struct compound_hdr hdr;
5592         int status;
5593
5594         status = decode_compound_hdr(xdr, &hdr);
5595         if (!status)
5596                 status = decode_release_lockowner(xdr);
5597         return status;
5598 }
5599
5600 /*
5601  * Decode READLINK response
5602  */
5603 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5604                                  struct xdr_stream *xdr,
5605                                  struct nfs4_readlink_res *res)
5606 {
5607         struct compound_hdr hdr;
5608         int status;
5609
5610         status = decode_compound_hdr(xdr, &hdr);
5611         if (status)
5612                 goto out;
5613         status = decode_sequence(xdr, &res->seq_res, rqstp);
5614         if (status)
5615                 goto out;
5616         status = decode_putfh(xdr);
5617         if (status)
5618                 goto out;
5619         status = decode_readlink(xdr, rqstp);
5620 out:
5621         return status;
5622 }
5623
5624 /*
5625  * Decode READDIR response
5626  */
5627 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5628                                 struct nfs4_readdir_res *res)
5629 {
5630         struct compound_hdr hdr;
5631         int status;
5632
5633         status = decode_compound_hdr(xdr, &hdr);
5634         if (status)
5635                 goto out;
5636         status = decode_sequence(xdr, &res->seq_res, rqstp);
5637         if (status)
5638                 goto out;
5639         status = decode_putfh(xdr);
5640         if (status)
5641                 goto out;
5642         status = decode_readdir(xdr, rqstp, res);
5643 out:
5644         return status;
5645 }
5646
5647 /*
5648  * Decode Read response
5649  */
5650 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5651                              struct nfs_readres *res)
5652 {
5653         struct compound_hdr hdr;
5654         int status;
5655
5656         status = decode_compound_hdr(xdr, &hdr);
5657         if (status)
5658                 goto out;
5659         status = decode_sequence(xdr, &res->seq_res, rqstp);
5660         if (status)
5661                 goto out;
5662         status = decode_putfh(xdr);
5663         if (status)
5664                 goto out;
5665         status = decode_read(xdr, rqstp, res);
5666         if (!status)
5667                 status = res->count;
5668 out:
5669         return status;
5670 }
5671
5672 /*
5673  * Decode WRITE response
5674  */
5675 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5676                               struct nfs_writeres *res)
5677 {
5678         struct compound_hdr hdr;
5679         int status;
5680
5681         status = decode_compound_hdr(xdr, &hdr);
5682         if (status)
5683                 goto out;
5684         status = decode_sequence(xdr, &res->seq_res, rqstp);
5685         if (status)
5686                 goto out;
5687         status = decode_putfh(xdr);
5688         if (status)
5689                 goto out;
5690         status = decode_write(xdr, res);
5691         if (status)
5692                 goto out;
5693         decode_getfattr(xdr, res->fattr, res->server,
5694                         !RPC_IS_ASYNC(rqstp->rq_task));
5695         if (!status)
5696                 status = res->count;
5697 out:
5698         return status;
5699 }
5700
5701 /*
5702  * Decode COMMIT response
5703  */
5704 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5705                                struct nfs_writeres *res)
5706 {
5707         struct compound_hdr hdr;
5708         int status;
5709
5710         status = decode_compound_hdr(xdr, &hdr);
5711         if (status)
5712                 goto out;
5713         status = decode_sequence(xdr, &res->seq_res, rqstp);
5714         if (status)
5715                 goto out;
5716         status = decode_putfh(xdr);
5717         if (status)
5718                 goto out;
5719         status = decode_commit(xdr, res);
5720         if (status)
5721                 goto out;
5722         decode_getfattr(xdr, res->fattr, res->server,
5723                         !RPC_IS_ASYNC(rqstp->rq_task));
5724 out:
5725         return status;
5726 }
5727
5728 /*
5729  * Decode FSINFO response
5730  */
5731 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5732                                struct nfs4_fsinfo_res *res)
5733 {
5734         struct compound_hdr hdr;
5735         int status;
5736
5737         status = decode_compound_hdr(xdr, &hdr);
5738         if (!status)
5739                 status = decode_sequence(xdr, &res->seq_res, req);
5740         if (!status)
5741                 status = decode_putfh(xdr);
5742         if (!status)
5743                 status = decode_fsinfo(xdr, res->fsinfo);
5744         return status;
5745 }
5746
5747 /*
5748  * Decode PATHCONF response
5749  */
5750 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5751                                  struct nfs4_pathconf_res *res)
5752 {
5753         struct compound_hdr hdr;
5754         int status;
5755
5756         status = decode_compound_hdr(xdr, &hdr);
5757         if (!status)
5758                 status = decode_sequence(xdr, &res->seq_res, req);
5759         if (!status)
5760                 status = decode_putfh(xdr);
5761         if (!status)
5762                 status = decode_pathconf(xdr, res->pathconf);
5763         return status;
5764 }
5765
5766 /*
5767  * Decode STATFS response
5768  */
5769 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5770                                struct nfs4_statfs_res *res)
5771 {
5772         struct compound_hdr hdr;
5773         int status;
5774
5775         status = decode_compound_hdr(xdr, &hdr);
5776         if (!status)
5777                 status = decode_sequence(xdr, &res->seq_res, req);
5778         if (!status)
5779                 status = decode_putfh(xdr);
5780         if (!status)
5781                 status = decode_statfs(xdr, res->fsstat);
5782         return status;
5783 }
5784
5785 /*
5786  * Decode GETATTR_BITMAP response
5787  */
5788 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5789                                     struct xdr_stream *xdr,
5790                                     struct nfs4_server_caps_res *res)
5791 {
5792         struct compound_hdr hdr;
5793         int status;
5794
5795         status = decode_compound_hdr(xdr, &hdr);
5796         if (status)
5797                 goto out;
5798         status = decode_sequence(xdr, &res->seq_res, req);
5799         if (status)
5800                 goto out;
5801         status = decode_putfh(xdr);
5802         if (status)
5803                 goto out;
5804         status = decode_server_caps(xdr, res);
5805 out:
5806         return status;
5807 }
5808
5809 /*
5810  * Decode RENEW response
5811  */
5812 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5813                               void *__unused)
5814 {
5815         struct compound_hdr hdr;
5816         int status;
5817
5818         status = decode_compound_hdr(xdr, &hdr);
5819         if (!status)
5820                 status = decode_renew(xdr);
5821         return status;
5822 }
5823
5824 /*
5825  * Decode SETCLIENTID response
5826  */
5827 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5828                                     struct xdr_stream *xdr,
5829                                     struct nfs4_setclientid_res *res)
5830 {
5831         struct compound_hdr hdr;
5832         int status;
5833
5834         status = decode_compound_hdr(xdr, &hdr);
5835         if (!status)
5836                 status = decode_setclientid(xdr, res);
5837         return status;
5838 }
5839
5840 /*
5841  * Decode SETCLIENTID_CONFIRM response
5842  */
5843 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5844                                             struct xdr_stream *xdr,
5845                                             struct nfs_fsinfo *fsinfo)
5846 {
5847         struct compound_hdr hdr;
5848         int status;
5849
5850         status = decode_compound_hdr(xdr, &hdr);
5851         if (!status)
5852                 status = decode_setclientid_confirm(xdr);
5853         if (!status)
5854                 status = decode_putrootfh(xdr);
5855         if (!status)
5856                 status = decode_fsinfo(xdr, fsinfo);
5857         return status;
5858 }
5859
5860 /*
5861  * Decode DELEGRETURN response
5862  */
5863 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5864                                     struct xdr_stream *xdr,
5865                                     struct nfs4_delegreturnres *res)
5866 {
5867         struct compound_hdr hdr;
5868         int status;
5869
5870         status = decode_compound_hdr(xdr, &hdr);
5871         if (status)
5872                 goto out;
5873         status = decode_sequence(xdr, &res->seq_res, rqstp);
5874         if (status)
5875                 goto out;
5876         status = decode_putfh(xdr);
5877         if (status != 0)
5878                 goto out;
5879         status = decode_delegreturn(xdr);
5880         if (status != 0)
5881                 goto out;
5882         decode_getfattr(xdr, res->fattr, res->server,
5883                         !RPC_IS_ASYNC(rqstp->rq_task));
5884 out:
5885         return status;
5886 }
5887
5888 /*
5889  * Decode FS_LOCATIONS response
5890  */
5891 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
5892                                      struct xdr_stream *xdr,
5893                                      struct nfs4_fs_locations_res *res)
5894 {
5895         struct compound_hdr hdr;
5896         int status;
5897
5898         status = decode_compound_hdr(xdr, &hdr);
5899         if (status)
5900                 goto out;
5901         status = decode_sequence(xdr, &res->seq_res, req);
5902         if (status)
5903                 goto out;
5904         status = decode_putfh(xdr);
5905         if (status)
5906                 goto out;
5907         status = decode_lookup(xdr);
5908         if (status)
5909                 goto out;
5910         xdr_enter_page(xdr, PAGE_SIZE);
5911         status = decode_getfattr(xdr, &res->fs_locations->fattr,
5912                                  res->fs_locations->server,
5913                                  !RPC_IS_ASYNC(req->rq_task));
5914 out:
5915         return status;
5916 }
5917
5918 #if defined(CONFIG_NFS_V4_1)
5919 /*
5920  * Decode EXCHANGE_ID response
5921  */
5922 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
5923                                     struct xdr_stream *xdr,
5924                                     void *res)
5925 {
5926         struct compound_hdr hdr;
5927         int status;
5928
5929         status = decode_compound_hdr(xdr, &hdr);
5930         if (!status)
5931                 status = decode_exchange_id(xdr, res);
5932         return status;
5933 }
5934
5935 /*
5936  * Decode CREATE_SESSION response
5937  */
5938 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
5939                                        struct xdr_stream *xdr,
5940                                        struct nfs41_create_session_res *res)
5941 {
5942         struct compound_hdr hdr;
5943         int status;
5944
5945         status = decode_compound_hdr(xdr, &hdr);
5946         if (!status)
5947                 status = decode_create_session(xdr, res);
5948         return status;
5949 }
5950
5951 /*
5952  * Decode DESTROY_SESSION response
5953  */
5954 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
5955                                         struct xdr_stream *xdr,
5956                                         void *res)
5957 {
5958         struct compound_hdr hdr;
5959         int status;
5960
5961         status = decode_compound_hdr(xdr, &hdr);
5962         if (!status)
5963                 status = decode_destroy_session(xdr, res);
5964         return status;
5965 }
5966
5967 /*
5968  * Decode SEQUENCE response
5969  */
5970 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
5971                                  struct xdr_stream *xdr,
5972                                  struct nfs4_sequence_res *res)
5973 {
5974         struct compound_hdr hdr;
5975         int status;
5976
5977         status = decode_compound_hdr(xdr, &hdr);
5978         if (!status)
5979                 status = decode_sequence(xdr, res, rqstp);
5980         return status;
5981 }
5982
5983 /*
5984  * Decode GET_LEASE_TIME response
5985  */
5986 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
5987                                        struct xdr_stream *xdr,
5988                                        struct nfs4_get_lease_time_res *res)
5989 {
5990         struct compound_hdr hdr;
5991         int status;
5992
5993         status = decode_compound_hdr(xdr, &hdr);
5994         if (!status)
5995                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
5996         if (!status)
5997                 status = decode_putrootfh(xdr);
5998         if (!status)
5999                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6000         return status;
6001 }
6002
6003 /*
6004  * Decode RECLAIM_COMPLETE response
6005  */
6006 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6007                                          struct xdr_stream *xdr,
6008                                          struct nfs41_reclaim_complete_res *res)
6009 {
6010         struct compound_hdr hdr;
6011         int status;
6012
6013         status = decode_compound_hdr(xdr, &hdr);
6014         if (!status)
6015                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6016         if (!status)
6017                 status = decode_reclaim_complete(xdr, (void *)NULL);
6018         return status;
6019 }
6020
6021 /*
6022  * Decode GETDEVINFO response
6023  */
6024 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6025                                       struct xdr_stream *xdr,
6026                                       struct nfs4_getdeviceinfo_res *res)
6027 {
6028         struct compound_hdr hdr;
6029         int status;
6030
6031         status = decode_compound_hdr(xdr, &hdr);
6032         if (status != 0)
6033                 goto out;
6034         status = decode_sequence(xdr, &res->seq_res, rqstp);
6035         if (status != 0)
6036                 goto out;
6037         status = decode_getdeviceinfo(xdr, res->pdev);
6038 out:
6039         return status;
6040 }
6041
6042 /*
6043  * Decode LAYOUTGET response
6044  */
6045 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6046                                   struct xdr_stream *xdr,
6047                                   struct nfs4_layoutget_res *res)
6048 {
6049         struct compound_hdr hdr;
6050         int status;
6051
6052         status = decode_compound_hdr(xdr, &hdr);
6053         if (status)
6054                 goto out;
6055         status = decode_sequence(xdr, &res->seq_res, rqstp);
6056         if (status)
6057                 goto out;
6058         status = decode_putfh(xdr);
6059         if (status)
6060                 goto out;
6061         status = decode_layoutget(xdr, rqstp, res);
6062 out:
6063         return status;
6064 }
6065 #endif /* CONFIG_NFS_V4_1 */
6066
6067 /**
6068  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6069  *                      the local page cache.
6070  * @xdr: XDR stream where entry resides
6071  * @entry: buffer to fill in with entry data
6072  * @plus: boolean indicating whether this should be a readdirplus entry
6073  *
6074  * Returns zero if successful, otherwise a negative errno value is
6075  * returned.
6076  *
6077  * This function is not invoked during READDIR reply decoding, but
6078  * rather whenever an application invokes the getdents(2) system call
6079  * on a directory already in our cache.
6080  */
6081 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6082                        int plus)
6083 {
6084         uint32_t bitmap[2] = {0};
6085         uint32_t len;
6086         __be32 *p = xdr_inline_decode(xdr, 4);
6087         if (unlikely(!p))
6088                 goto out_overflow;
6089         if (*p == xdr_zero) {
6090                 p = xdr_inline_decode(xdr, 4);
6091                 if (unlikely(!p))
6092                         goto out_overflow;
6093                 if (*p == xdr_zero)
6094                         return -EAGAIN;
6095                 entry->eof = 1;
6096                 return -EBADCOOKIE;
6097         }
6098
6099         p = xdr_inline_decode(xdr, 12);
6100         if (unlikely(!p))
6101                 goto out_overflow;
6102         entry->prev_cookie = entry->cookie;
6103         p = xdr_decode_hyper(p, &entry->cookie);
6104         entry->len = be32_to_cpup(p);
6105
6106         p = xdr_inline_decode(xdr, entry->len);
6107         if (unlikely(!p))
6108                 goto out_overflow;
6109         entry->name = (const char *) p;
6110
6111         /*
6112          * In case the server doesn't return an inode number,
6113          * we fake one here.  (We don't use inode number 0,
6114          * since glibc seems to choke on it...)
6115          */
6116         entry->ino = 1;
6117         entry->fattr->valid = 0;
6118
6119         if (decode_attr_bitmap(xdr, bitmap) < 0)
6120                 goto out_overflow;
6121
6122         if (decode_attr_length(xdr, &len, &p) < 0)
6123                 goto out_overflow;
6124
6125         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6126                                         entry->server, 1) < 0)
6127                 goto out_overflow;
6128         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6129                 entry->ino = entry->fattr->fileid;
6130
6131         entry->d_type = DT_UNKNOWN;
6132         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6133                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6134
6135         return 0;
6136
6137 out_overflow:
6138         print_overflow_msg(__func__, xdr);
6139         return -EAGAIN;
6140 }
6141
6142 /*
6143  * We need to translate between nfs status return values and
6144  * the local errno values which may not be the same.
6145  */
6146 static struct {
6147         int stat;
6148         int errno;
6149 } nfs_errtbl[] = {
6150         { NFS4_OK,              0               },
6151         { NFS4ERR_PERM,         -EPERM          },
6152         { NFS4ERR_NOENT,        -ENOENT         },
6153         { NFS4ERR_IO,           -errno_NFSERR_IO},
6154         { NFS4ERR_NXIO,         -ENXIO          },
6155         { NFS4ERR_ACCESS,       -EACCES         },
6156         { NFS4ERR_EXIST,        -EEXIST         },
6157         { NFS4ERR_XDEV,         -EXDEV          },
6158         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6159         { NFS4ERR_ISDIR,        -EISDIR         },
6160         { NFS4ERR_INVAL,        -EINVAL         },
6161         { NFS4ERR_FBIG,         -EFBIG          },
6162         { NFS4ERR_NOSPC,        -ENOSPC         },
6163         { NFS4ERR_ROFS,         -EROFS          },
6164         { NFS4ERR_MLINK,        -EMLINK         },
6165         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6166         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6167         { NFS4ERR_DQUOT,        -EDQUOT         },
6168         { NFS4ERR_STALE,        -ESTALE         },
6169         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6170         { NFS4ERR_BADOWNER,     -EINVAL         },
6171         { NFS4ERR_BADNAME,      -EINVAL         },
6172         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6173         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6174         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6175         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6176         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6177         { NFS4ERR_LOCKED,       -EAGAIN         },
6178         { NFS4ERR_SYMLINK,      -ELOOP          },
6179         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6180         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6181         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
6182                                                     * to be handled by a
6183                                                     * middle-layer.
6184                                                     */
6185         { -1,                   -EIO            }
6186 };
6187
6188 /*
6189  * Convert an NFS error code to a local one.
6190  * This one is used jointly by NFSv2 and NFSv3.
6191  */
6192 static int
6193 nfs4_stat_to_errno(int stat)
6194 {
6195         int i;
6196         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6197                 if (nfs_errtbl[i].stat == stat)
6198                         return nfs_errtbl[i].errno;
6199         }
6200         if (stat <= 10000 || stat > 10100) {
6201                 /* The server is looney tunes. */
6202                 return -EREMOTEIO;
6203         }
6204         /* If we cannot translate the error, the recovery routines should
6205          * handle it.
6206          * Note: remaining NFSv4 error codes have values > 10000, so should
6207          * not conflict with native Linux error codes.
6208          */
6209         return -stat;
6210 }
6211
6212 #define PROC(proc, argtype, restype)                            \
6213 [NFSPROC4_CLNT_##proc] = {                                      \
6214         .p_proc   = NFSPROC4_COMPOUND,                          \
6215         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6216         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6217         .p_arglen = NFS4_##argtype##_sz,                        \
6218         .p_replen = NFS4_##restype##_sz,                        \
6219         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6220         .p_name   = #proc,                                      \
6221 }
6222
6223 struct rpc_procinfo     nfs4_procedures[] = {
6224         PROC(READ,              enc_read,               dec_read),
6225         PROC(WRITE,             enc_write,              dec_write),
6226         PROC(COMMIT,            enc_commit,             dec_commit),
6227         PROC(OPEN,              enc_open,               dec_open),
6228         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6229         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6230         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6231         PROC(CLOSE,             enc_close,              dec_close),
6232         PROC(SETATTR,           enc_setattr,            dec_setattr),
6233         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6234         PROC(RENEW,             enc_renew,              dec_renew),
6235         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6236         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6237         PROC(LOCK,              enc_lock,               dec_lock),
6238         PROC(LOCKT,             enc_lockt,              dec_lockt),
6239         PROC(LOCKU,             enc_locku,              dec_locku),
6240         PROC(ACCESS,            enc_access,             dec_access),
6241         PROC(GETATTR,           enc_getattr,            dec_getattr),
6242         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6243         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6244         PROC(REMOVE,            enc_remove,             dec_remove),
6245         PROC(RENAME,            enc_rename,             dec_rename),
6246         PROC(LINK,              enc_link,               dec_link),
6247         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6248         PROC(CREATE,            enc_create,             dec_create),
6249         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6250         PROC(STATFS,            enc_statfs,             dec_statfs),
6251         PROC(READLINK,          enc_readlink,           dec_readlink),
6252         PROC(READDIR,           enc_readdir,            dec_readdir),
6253         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6254         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6255         PROC(GETACL,            enc_getacl,             dec_getacl),
6256         PROC(SETACL,            enc_setacl,             dec_setacl),
6257         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6258         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6259 #if defined(CONFIG_NFS_V4_1)
6260         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6261         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6262         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6263         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6264         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6265         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6266         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6267         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6268 #endif /* CONFIG_NFS_V4_1 */
6269 };
6270
6271 struct rpc_version              nfs_version4 = {
6272         .number                 = 4,
6273         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6274         .procs                  = nfs4_procedures
6275 };
6276
6277 /*
6278  * Local variables:
6279  *  c-basic-offset: 8
6280  * End:
6281  */