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 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 328                                 2 /* offset */ + \
 329                                 2 /* length */ + \
 330                                 1 /* reclaim */ + \
 331                                 encode_stateid_maxsz + \
 332                                 1 /* new offset (true) */ + \
 333                                 2 /* last byte written */ + \
 334                                 1 /* nt_timechanged (false) */ + \
 335                                 1 /* layoutupdate4 layout type */ + \
 336                                 1 /* NULL filelayout layoutupdate4 payload */)
 337 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 338
 339 #else /* CONFIG_NFS_V4_1 */
 340 #define encode_sequence_maxsz   0
 341 #define decode_sequence_maxsz   0
 342 #endif /* CONFIG_NFS_V4_1 */
 343
 344 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 345 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 346 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 347                                 encode_sequence_maxsz + \
 348                                 encode_putfh_maxsz + \
 349                                 encode_read_maxsz)
 350 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 351                                 decode_sequence_maxsz + \
 352                                 decode_putfh_maxsz + \
 353                                 decode_read_maxsz)
 354 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 355                                 encode_sequence_maxsz + \
 356                                 encode_putfh_maxsz + \
 357                                 encode_readlink_maxsz)
 358 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 359                                 decode_sequence_maxsz + \
 360                                 decode_putfh_maxsz + \
 361                                 decode_readlink_maxsz)
 362 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 363                                 encode_sequence_maxsz + \
 364                                 encode_putfh_maxsz + \
 365                                 encode_readdir_maxsz)
 366 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 367                                 decode_sequence_maxsz + \
 368                                 decode_putfh_maxsz + \
 369                                 decode_readdir_maxsz)
 370 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 371                                 encode_sequence_maxsz + \
 372                                 encode_putfh_maxsz + \
 373                                 encode_write_maxsz + \
 374                                 encode_getattr_maxsz)
 375 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 376                                 decode_sequence_maxsz + \
 377                                 decode_putfh_maxsz + \
 378                                 decode_write_maxsz + \
 379                                 decode_getattr_maxsz)
 380 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 381                                 encode_sequence_maxsz + \
 382                                 encode_putfh_maxsz + \
 383                                 encode_commit_maxsz + \
 384                                 encode_getattr_maxsz)
 385 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 386                                 decode_sequence_maxsz + \
 387                                 decode_putfh_maxsz + \
 388                                 decode_commit_maxsz + \
 389                                 decode_getattr_maxsz)
 390 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 391                                 encode_sequence_maxsz + \
 392                                 encode_putfh_maxsz + \
 393                                 encode_savefh_maxsz + \
 394                                 encode_open_maxsz + \
 395                                 encode_getfh_maxsz + \
 396                                 encode_getattr_maxsz + \
 397                                 encode_restorefh_maxsz + \
 398                                 encode_getattr_maxsz)
 399 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 400                                 decode_sequence_maxsz + \
 401                                 decode_putfh_maxsz + \
 402                                 decode_savefh_maxsz + \
 403                                 decode_open_maxsz + \
 404                                 decode_getfh_maxsz + \
 405                                 decode_getattr_maxsz + \
 406                                 decode_restorefh_maxsz + \
 407                                 decode_getattr_maxsz)
 408 #define NFS4_enc_open_confirm_sz \
 409                                 (compound_encode_hdr_maxsz + \
 410                                  encode_putfh_maxsz + \
 411                                  encode_open_confirm_maxsz)
 412 #define NFS4_dec_open_confirm_sz \
 413                                 (compound_decode_hdr_maxsz + \
 414                                  decode_putfh_maxsz + \
 415                                  decode_open_confirm_maxsz)
 416 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 417                                         encode_sequence_maxsz + \
 418                                         encode_putfh_maxsz + \
 419                                         encode_open_maxsz + \
 420                                         encode_getattr_maxsz)
 421 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 422                                         decode_sequence_maxsz + \
 423                                         decode_putfh_maxsz + \
 424                                         decode_open_maxsz + \
 425                                         decode_getattr_maxsz)
 426 #define NFS4_enc_open_downgrade_sz \
 427                                 (compound_encode_hdr_maxsz + \
 428                                  encode_sequence_maxsz + \
 429                                  encode_putfh_maxsz + \
 430                                  encode_open_downgrade_maxsz + \
 431                                  encode_getattr_maxsz)
 432 #define NFS4_dec_open_downgrade_sz \
 433                                 (compound_decode_hdr_maxsz + \
 434                                  decode_sequence_maxsz + \
 435                                  decode_putfh_maxsz + \
 436                                  decode_open_downgrade_maxsz + \
 437                                  decode_getattr_maxsz)
 438 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 439                                  encode_sequence_maxsz + \
 440                                  encode_putfh_maxsz + \
 441                                  encode_close_maxsz + \
 442                                  encode_getattr_maxsz)
 443 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 444                                  decode_sequence_maxsz + \
 445                                  decode_putfh_maxsz + \
 446                                  decode_close_maxsz + \
 447                                  decode_getattr_maxsz)
 448 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 449                                  encode_sequence_maxsz + \
 450                                  encode_putfh_maxsz + \
 451                                  encode_setattr_maxsz + \
 452                                  encode_getattr_maxsz)
 453 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 454                                  decode_sequence_maxsz + \
 455                                  decode_putfh_maxsz + \
 456                                  decode_setattr_maxsz + \
 457                                  decode_getattr_maxsz)
 458 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 459                                 encode_sequence_maxsz + \
 460                                 encode_putfh_maxsz + \
 461                                 encode_fsinfo_maxsz)
 462 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 463                                 decode_sequence_maxsz + \
 464                                 decode_putfh_maxsz + \
 465                                 decode_fsinfo_maxsz)
 466 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 467                                 encode_renew_maxsz)
 468 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 469                                 decode_renew_maxsz)
 470 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 471                                 encode_setclientid_maxsz)
 472 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 473                                 decode_setclientid_maxsz)
 474 #define NFS4_enc_setclientid_confirm_sz \
 475                                 (compound_encode_hdr_maxsz + \
 476                                 encode_setclientid_confirm_maxsz + \
 477                                 encode_putrootfh_maxsz + \
 478                                 encode_fsinfo_maxsz)
 479 #define NFS4_dec_setclientid_confirm_sz \
 480                                 (compound_decode_hdr_maxsz + \
 481                                 decode_setclientid_confirm_maxsz + \
 482                                 decode_putrootfh_maxsz + \
 483                                 decode_fsinfo_maxsz)
 484 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 485                                 encode_sequence_maxsz + \
 486                                 encode_putfh_maxsz + \
 487                                 encode_lock_maxsz)
 488 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 489                                 decode_sequence_maxsz + \
 490                                 decode_putfh_maxsz + \
 491                                 decode_lock_maxsz)
 492 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 493                                 encode_sequence_maxsz + \
 494                                 encode_putfh_maxsz + \
 495                                 encode_lockt_maxsz)
 496 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 497                                  decode_sequence_maxsz + \
 498                                  decode_putfh_maxsz + \
 499                                  decode_lockt_maxsz)
 500 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 501                                 encode_sequence_maxsz + \
 502                                 encode_putfh_maxsz + \
 503                                 encode_locku_maxsz)
 504 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 505                                 decode_sequence_maxsz + \
 506                                 decode_putfh_maxsz + \
 507                                 decode_locku_maxsz)
 508 #define NFS4_enc_release_lockowner_sz \
 509                                 (compound_encode_hdr_maxsz + \
 510                                  encode_lockowner_maxsz)
 511 #define NFS4_dec_release_lockowner_sz \
 512                                 (compound_decode_hdr_maxsz + \
 513                                  decode_lockowner_maxsz)
 514 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 515                                 encode_sequence_maxsz + \
 516                                 encode_putfh_maxsz + \
 517                                 encode_access_maxsz + \
 518                                 encode_getattr_maxsz)
 519 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 520                                 decode_sequence_maxsz + \
 521                                 decode_putfh_maxsz + \
 522                                 decode_access_maxsz + \
 523                                 decode_getattr_maxsz)
 524 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 525                                 encode_sequence_maxsz + \
 526                                 encode_putfh_maxsz + \
 527                                 encode_getattr_maxsz)
 528 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 529                                 decode_sequence_maxsz + \
 530                                 decode_putfh_maxsz + \
 531                                 decode_getattr_maxsz)
 532 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 533                                 encode_sequence_maxsz + \
 534                                 encode_putfh_maxsz + \
 535                                 encode_lookup_maxsz + \
 536                                 encode_getattr_maxsz + \
 537                                 encode_getfh_maxsz)
 538 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 539                                 decode_sequence_maxsz + \
 540                                 decode_putfh_maxsz + \
 541                                 decode_lookup_maxsz + \
 542                                 decode_getattr_maxsz + \
 543                                 decode_getfh_maxsz)
 544 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 545                                 encode_sequence_maxsz + \
 546                                 encode_putrootfh_maxsz + \
 547                                 encode_getattr_maxsz + \
 548                                 encode_getfh_maxsz)
 549 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 550                                 decode_sequence_maxsz + \
 551                                 decode_putrootfh_maxsz + \
 552                                 decode_getattr_maxsz + \
 553                                 decode_getfh_maxsz)
 554 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 555                                 encode_sequence_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_remove_maxsz + \
 558                                 encode_getattr_maxsz)
 559 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 560                                 decode_sequence_maxsz + \
 561                                 decode_putfh_maxsz + \
 562                                 decode_remove_maxsz + \
 563                                 decode_getattr_maxsz)
 564 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 565                                 encode_sequence_maxsz + \
 566                                 encode_putfh_maxsz + \
 567                                 encode_savefh_maxsz + \
 568                                 encode_putfh_maxsz + \
 569                                 encode_rename_maxsz + \
 570                                 encode_getattr_maxsz + \
 571                                 encode_restorefh_maxsz + \
 572                                 encode_getattr_maxsz)
 573 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 574                                 decode_sequence_maxsz + \
 575                                 decode_putfh_maxsz + \
 576                                 decode_savefh_maxsz + \
 577                                 decode_putfh_maxsz + \
 578                                 decode_rename_maxsz + \
 579                                 decode_getattr_maxsz + \
 580                                 decode_restorefh_maxsz + \
 581                                 decode_getattr_maxsz)
 582 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 583                                 encode_sequence_maxsz + \
 584                                 encode_putfh_maxsz + \
 585                                 encode_savefh_maxsz + \
 586                                 encode_putfh_maxsz + \
 587                                 encode_link_maxsz + \
 588                                 decode_getattr_maxsz + \
 589                                 encode_restorefh_maxsz + \
 590                                 decode_getattr_maxsz)
 591 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 592                                 decode_sequence_maxsz + \
 593                                 decode_putfh_maxsz + \
 594                                 decode_savefh_maxsz + \
 595                                 decode_putfh_maxsz + \
 596                                 decode_link_maxsz + \
 597                                 decode_getattr_maxsz + \
 598                                 decode_restorefh_maxsz + \
 599                                 decode_getattr_maxsz)
 600 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 601                                 encode_sequence_maxsz + \
 602                                 encode_putfh_maxsz + \
 603                                 encode_symlink_maxsz + \
 604                                 encode_getattr_maxsz + \
 605                                 encode_getfh_maxsz)
 606 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 607                                 decode_sequence_maxsz + \
 608                                 decode_putfh_maxsz + \
 609                                 decode_symlink_maxsz + \
 610                                 decode_getattr_maxsz + \
 611                                 decode_getfh_maxsz)
 612 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 613                                 encode_sequence_maxsz + \
 614                                 encode_putfh_maxsz + \
 615                                 encode_savefh_maxsz + \
 616                                 encode_create_maxsz + \
 617                                 encode_getfh_maxsz + \
 618                                 encode_getattr_maxsz + \
 619                                 encode_restorefh_maxsz + \
 620                                 encode_getattr_maxsz)
 621 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 622                                 decode_sequence_maxsz + \
 623                                 decode_putfh_maxsz + \
 624                                 decode_savefh_maxsz + \
 625                                 decode_create_maxsz + \
 626                                 decode_getfh_maxsz + \
 627                                 decode_getattr_maxsz + \
 628                                 decode_restorefh_maxsz + \
 629                                 decode_getattr_maxsz)
 630 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 631                                 encode_sequence_maxsz + \
 632                                 encode_putfh_maxsz + \
 633                                 encode_getattr_maxsz)
 634 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 635                                 decode_sequence_maxsz + \
 636                                 decode_putfh_maxsz + \
 637                                 decode_getattr_maxsz)
 638 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 639                                 encode_sequence_maxsz + \
 640                                 encode_putfh_maxsz + \
 641                                 encode_statfs_maxsz)
 642 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 643                                 decode_sequence_maxsz + \
 644                                 decode_putfh_maxsz + \
 645                                 decode_statfs_maxsz)
 646 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 647                                 encode_sequence_maxsz + \
 648                                 encode_putfh_maxsz + \
 649                                 encode_getattr_maxsz)
 650 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 651                                 decode_sequence_maxsz + \
 652                                 decode_putfh_maxsz + \
 653                                 decode_getattr_maxsz)
 654 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 655                                 encode_sequence_maxsz + \
 656                                 encode_putfh_maxsz + \
 657                                 encode_delegreturn_maxsz + \
 658                                 encode_getattr_maxsz)
 659 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 660                                 decode_sequence_maxsz + \
 661                                 decode_delegreturn_maxsz + \
 662                                 decode_getattr_maxsz)
 663 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 664                                 encode_sequence_maxsz + \
 665                                 encode_putfh_maxsz + \
 666                                 encode_getacl_maxsz)
 667 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 668                                 decode_sequence_maxsz + \
 669                                 decode_putfh_maxsz + \
 670                                 decode_getacl_maxsz)
 671 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 672                                 encode_sequence_maxsz + \
 673                                 encode_putfh_maxsz + \
 674                                 encode_setacl_maxsz)
 675 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 676                                 decode_sequence_maxsz + \
 677                                 decode_putfh_maxsz + \
 678                                 decode_setacl_maxsz)
 679 #define NFS4_enc_fs_locations_sz \
 680                                 (compound_encode_hdr_maxsz + \
 681                                  encode_sequence_maxsz + \
 682                                  encode_putfh_maxsz + \
 683                                  encode_lookup_maxsz + \
 684                                  encode_fs_locations_maxsz)
 685 #define NFS4_dec_fs_locations_sz \
 686                                 (compound_decode_hdr_maxsz + \
 687                                  decode_sequence_maxsz + \
 688                                  decode_putfh_maxsz + \
 689                                  decode_lookup_maxsz + \
 690                                  decode_fs_locations_maxsz)
 691 #if defined(CONFIG_NFS_V4_1)
 692 #define NFS4_enc_exchange_id_sz \
 693                                 (compound_encode_hdr_maxsz + \
 694                                  encode_exchange_id_maxsz)
 695 #define NFS4_dec_exchange_id_sz \
 696                                 (compound_decode_hdr_maxsz + \
 697                                  decode_exchange_id_maxsz)
 698 #define NFS4_enc_create_session_sz \
 699                                 (compound_encode_hdr_maxsz + \
 700                                  encode_create_session_maxsz)
 701 #define NFS4_dec_create_session_sz \
 702                                 (compound_decode_hdr_maxsz + \
 703                                  decode_create_session_maxsz)
 704 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 705                                          encode_destroy_session_maxsz)
 706 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 707                                          decode_destroy_session_maxsz)
 708 #define NFS4_enc_sequence_sz \
 709                                 (compound_decode_hdr_maxsz + \
 710                                  encode_sequence_maxsz)
 711 #define NFS4_dec_sequence_sz \
 712                                 (compound_decode_hdr_maxsz + \
 713                                  decode_sequence_maxsz)
 714 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 715                                          encode_sequence_maxsz + \
 716                                          encode_putrootfh_maxsz + \
 717                                          encode_fsinfo_maxsz)
 718 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 719                                          decode_sequence_maxsz + \
 720                                          decode_putrootfh_maxsz + \
 721                                          decode_fsinfo_maxsz)
 722 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 723                                          encode_sequence_maxsz + \
 724                                          encode_reclaim_complete_maxsz)
 725 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 726                                          decode_sequence_maxsz + \
 727                                          decode_reclaim_complete_maxsz)
 728 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 729                                 encode_sequence_maxsz +\
 730                                 encode_getdeviceinfo_maxsz)
 731 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 732                                 decode_sequence_maxsz + \
 733                                 decode_getdeviceinfo_maxsz)
 734 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 735                                 encode_sequence_maxsz + \
 736                                 encode_putfh_maxsz +        \
 737                                 encode_layoutget_maxsz)
 738 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 739                                 decode_sequence_maxsz + \
 740                                 decode_putfh_maxsz +        \
 741                                 decode_layoutget_maxsz)
 742 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 743                                 encode_sequence_maxsz +\
 744                                 encode_putfh_maxsz + \
 745                                 encode_layoutcommit_maxsz + \
 746                                 encode_getattr_maxsz)
 747 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 748                                 decode_sequence_maxsz + \
 749                                 decode_putfh_maxsz + \
 750                                 decode_layoutcommit_maxsz + \
 751                                 decode_getattr_maxsz)
 752
 753
 754 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 755                                       compound_encode_hdr_maxsz +
 756                                       encode_sequence_maxsz +
 757                                       encode_putfh_maxsz +
 758                                       encode_getattr_maxsz) *
 759                                      XDR_UNIT);
 760
 761 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 762                                      compound_decode_hdr_maxsz +
 763                                      decode_sequence_maxsz +
 764                                      decode_putfh_maxsz) *
 765                                     XDR_UNIT);
 766 #endif /* CONFIG_NFS_V4_1 */
 767
 768 static const umode_t nfs_type2fmt[] = {
 769         [NF4BAD] = 0,
 770         [NF4REG] = S_IFREG,
 771         [NF4DIR] = S_IFDIR,
 772         [NF4BLK] = S_IFBLK,
 773         [NF4CHR] = S_IFCHR,
 774         [NF4LNK] = S_IFLNK,
 775         [NF4SOCK] = S_IFSOCK,
 776         [NF4FIFO] = S_IFIFO,
 777         [NF4ATTRDIR] = 0,
 778         [NF4NAMEDATTR] = 0,
 779 };
 780
 781 struct compound_hdr {
 782         int32_t         status;
 783         uint32_t        nops;
 784         __be32 *        nops_p;
 785         uint32_t        taglen;
 786         char *          tag;
 787         uint32_t        replen;         /* expected reply words */
 788         u32             minorversion;
 789 };
 790
 791 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 792 {
 793         __be32 *p = xdr_reserve_space(xdr, nbytes);
 794         BUG_ON(!p);
 795         return p;
 796 }
 797
 798 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 799 {
 800         __be32 *p;
 801
 802         p = xdr_reserve_space(xdr, 4 + len);
 803         BUG_ON(p == NULL);
 804         xdr_encode_opaque(p, str, len);
 805 }
 806
 807 static void encode_compound_hdr(struct xdr_stream *xdr,
 808                                 struct rpc_rqst *req,
 809                                 struct compound_hdr *hdr)
 810 {
 811         __be32 *p;
 812         struct rpc_auth *auth = req->rq_cred->cr_auth;
 813
 814         /* initialize running count of expected bytes in reply.
 815          * NOTE: the replied tag SHOULD be the same is the one sent,
 816          * but this is not required as a MUST for the server to do so. */
 817         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 818
 819         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 820         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 821         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 822         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 823         *p++ = cpu_to_be32(hdr->minorversion);
 824         hdr->nops_p = p;
 825         *p = cpu_to_be32(hdr->nops);
 826 }
 827
 828 static void encode_nops(struct compound_hdr *hdr)
 829 {
 830         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 831         *hdr->nops_p = htonl(hdr->nops);
 832 }
 833
 834 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 835 {
 836         __be32 *p;
 837
 838         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 839         BUG_ON(p == NULL);
 840         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 841 }
 842
 843 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 844 {
 845         char owner_name[IDMAP_NAMESZ];
 846         char owner_group[IDMAP_NAMESZ];
 847         int owner_namelen = 0;
 848         int owner_grouplen = 0;
 849         __be32 *p;
 850         __be32 *q;
 851         int len;
 852         uint32_t bmval0 = 0;
 853         uint32_t bmval1 = 0;
 854
 855         /*
 856          * We reserve enough space to write the entire attribute buffer at once.
 857          * In the worst-case, this would be
 858          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 859          *          = 36 bytes, plus any contribution from variable-length fields
 860          *            such as owner/group.
 861          */
 862         len = 16;
 863
 864         /* Sigh */
 865         if (iap->ia_valid & ATTR_SIZE)
 866                 len += 8;
 867         if (iap->ia_valid & ATTR_MODE)
 868                 len += 4;
 869         if (iap->ia_valid & ATTR_UID) {
 870                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 871                 if (owner_namelen < 0) {
 872                         dprintk("nfs: couldn't resolve uid %d to string\n",
 873                                         iap->ia_uid);
 874                         /* XXX */
 875                         strcpy(owner_name, "nobody");
 876                         owner_namelen = sizeof("nobody") - 1;
 877                         /* goto out; */
 878                 }
 879                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 880         }
 881         if (iap->ia_valid & ATTR_GID) {
 882                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 883                 if (owner_grouplen < 0) {
 884                         dprintk("nfs: couldn't resolve gid %d to string\n",
 885                                         iap->ia_gid);
 886                         strcpy(owner_group, "nobody");
 887                         owner_grouplen = sizeof("nobody") - 1;
 888                         /* goto out; */
 889                 }
 890                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 891         }
 892         if (iap->ia_valid & ATTR_ATIME_SET)
 893                 len += 16;
 894         else if (iap->ia_valid & ATTR_ATIME)
 895                 len += 4;
 896         if (iap->ia_valid & ATTR_MTIME_SET)
 897                 len += 16;
 898         else if (iap->ia_valid & ATTR_MTIME)
 899                 len += 4;
 900         p = reserve_space(xdr, len);
 901
 902         /*
 903          * We write the bitmap length now, but leave the bitmap and the attribute
 904          * buffer length to be backfilled at the end of this routine.
 905          */
 906         *p++ = cpu_to_be32(2);
 907         q = p;
 908         p += 3;
 909
 910         if (iap->ia_valid & ATTR_SIZE) {
 911                 bmval0 |= FATTR4_WORD0_SIZE;
 912                 p = xdr_encode_hyper(p, iap->ia_size);
 913         }
 914         if (iap->ia_valid & ATTR_MODE) {
 915                 bmval1 |= FATTR4_WORD1_MODE;
 916                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 917         }
 918         if (iap->ia_valid & ATTR_UID) {
 919                 bmval1 |= FATTR4_WORD1_OWNER;
 920                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 921         }
 922         if (iap->ia_valid & ATTR_GID) {
 923                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 924                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 925         }
 926         if (iap->ia_valid & ATTR_ATIME_SET) {
 927                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 928                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 929                 *p++ = cpu_to_be32(0);
 930                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 931                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 932         }
 933         else if (iap->ia_valid & ATTR_ATIME) {
 934                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 935                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 936         }
 937         if (iap->ia_valid & ATTR_MTIME_SET) {
 938                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 939                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 940                 *p++ = cpu_to_be32(0);
 941                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 942                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 943         }
 944         else if (iap->ia_valid & ATTR_MTIME) {
 945                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 946                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 947         }
 948
 949         /*
 950          * Now we backfill the bitmap and the attribute buffer length.
 951          */
 952         if (len != ((char *)p - (char *)q) + 4) {
 953                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 954                                 len, ((char *)p - (char *)q) + 4);
 955                 BUG();
 956         }
 957         len = (char *)p - (char *)q - 12;
 958         *q++ = htonl(bmval0);
 959         *q++ = htonl(bmval1);
 960         *q = htonl(len);
 961
 962 /* out: */
 963 }
 964
 965 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 966 {
 967         __be32 *p;
 968
 969         p = reserve_space(xdr, 8);
 970         *p++ = cpu_to_be32(OP_ACCESS);
 971         *p = cpu_to_be32(access);
 972         hdr->nops++;
 973         hdr->replen += decode_access_maxsz;
 974 }
 975
 976 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 977 {
 978         __be32 *p;
 979
 980         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 981         *p++ = cpu_to_be32(OP_CLOSE);
 982         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 983         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 984         hdr->nops++;
 985         hdr->replen += decode_close_maxsz;
 986 }
 987
 988 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 989 {
 990         __be32 *p;
 991
 992         p = reserve_space(xdr, 16);
 993         *p++ = cpu_to_be32(OP_COMMIT);
 994         p = xdr_encode_hyper(p, args->offset);
 995         *p = cpu_to_be32(args->count);
 996         hdr->nops++;
 997         hdr->replen += decode_commit_maxsz;
 998 }
 999
1000 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1001 {
1002         __be32 *p;
1003
1004         p = reserve_space(xdr, 8);
1005         *p++ = cpu_to_be32(OP_CREATE);
1006         *p = cpu_to_be32(create->ftype);
1007
1008         switch (create->ftype) {
1009         case NF4LNK:
1010                 p = reserve_space(xdr, 4);
1011                 *p = cpu_to_be32(create->u.symlink.len);
1012                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1013                 break;
1014
1015         case NF4BLK: case NF4CHR:
1016                 p = reserve_space(xdr, 8);
1017                 *p++ = cpu_to_be32(create->u.device.specdata1);
1018                 *p = cpu_to_be32(create->u.device.specdata2);
1019                 break;
1020
1021         default:
1022                 break;
1023         }
1024
1025         encode_string(xdr, create->name->len, create->name->name);
1026         hdr->nops++;
1027         hdr->replen += decode_create_maxsz;
1028
1029         encode_attrs(xdr, create->attrs, create->server);
1030 }
1031
1032 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1033 {
1034         __be32 *p;
1035
1036         p = reserve_space(xdr, 12);
1037         *p++ = cpu_to_be32(OP_GETATTR);
1038         *p++ = cpu_to_be32(1);
1039         *p = cpu_to_be32(bitmap);
1040         hdr->nops++;
1041         hdr->replen += decode_getattr_maxsz;
1042 }
1043
1044 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1045 {
1046         __be32 *p;
1047
1048         p = reserve_space(xdr, 16);
1049         *p++ = cpu_to_be32(OP_GETATTR);
1050         *p++ = cpu_to_be32(2);
1051         *p++ = cpu_to_be32(bm0);
1052         *p = cpu_to_be32(bm1);
1053         hdr->nops++;
1054         hdr->replen += decode_getattr_maxsz;
1055 }
1056
1057 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1058 {
1059         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1060                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1061 }
1062
1063 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1064 {
1065         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1066                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1067 }
1068
1069 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1070 {
1071         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1072                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1073 }
1074
1075 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1076 {
1077         __be32 *p;
1078
1079         p = reserve_space(xdr, 4);
1080         *p = cpu_to_be32(OP_GETFH);
1081         hdr->nops++;
1082         hdr->replen += decode_getfh_maxsz;
1083 }
1084
1085 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1086 {
1087         __be32 *p;
1088
1089         p = reserve_space(xdr, 8 + name->len);
1090         *p++ = cpu_to_be32(OP_LINK);
1091         xdr_encode_opaque(p, name->name, name->len);
1092         hdr->nops++;
1093         hdr->replen += decode_link_maxsz;
1094 }
1095
1096 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1097 {
1098         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1099                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1100         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1101 }
1102
1103 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1104 {
1105         if (fl->fl_end == OFFSET_MAX)
1106                 return ~(uint64_t)0;
1107         return fl->fl_end - fl->fl_start + 1;
1108 }
1109
1110 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1111 {
1112         __be32 *p;
1113
1114         p = reserve_space(xdr, 32);
1115         p = xdr_encode_hyper(p, lowner->clientid);
1116         *p++ = cpu_to_be32(20);
1117         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1118         *p++ = cpu_to_be32(lowner->s_dev);
1119         xdr_encode_hyper(p, lowner->id);
1120 }
1121
1122 /*
1123  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1124  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1125  */
1126 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1127 {
1128         __be32 *p;
1129
1130         p = reserve_space(xdr, 32);
1131         *p++ = cpu_to_be32(OP_LOCK);
1132         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1133         *p++ = cpu_to_be32(args->reclaim);
1134         p = xdr_encode_hyper(p, args->fl->fl_start);
1135         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1136         *p = cpu_to_be32(args->new_lock_owner);
1137         if (args->new_lock_owner){
1138                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1139                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1140                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1141                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1142                 encode_lockowner(xdr, &args->lock_owner);
1143         }
1144         else {
1145                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1146                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1147                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1148         }
1149         hdr->nops++;
1150         hdr->replen += decode_lock_maxsz;
1151 }
1152
1153 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1154 {
1155         __be32 *p;
1156
1157         p = reserve_space(xdr, 24);
1158         *p++ = cpu_to_be32(OP_LOCKT);
1159         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1160         p = xdr_encode_hyper(p, args->fl->fl_start);
1161         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1162         encode_lockowner(xdr, &args->lock_owner);
1163         hdr->nops++;
1164         hdr->replen += decode_lockt_maxsz;
1165 }
1166
1167 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1168 {
1169         __be32 *p;
1170
1171         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1172         *p++ = cpu_to_be32(OP_LOCKU);
1173         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1174         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1175         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1176         p = xdr_encode_hyper(p, args->fl->fl_start);
1177         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1178         hdr->nops++;
1179         hdr->replen += decode_locku_maxsz;
1180 }
1181
1182 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1183 {
1184         __be32 *p;
1185
1186         p = reserve_space(xdr, 4);
1187         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1188         encode_lockowner(xdr, lowner);
1189         hdr->nops++;
1190         hdr->replen += decode_release_lockowner_maxsz;
1191 }
1192
1193 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1194 {
1195         int len = name->len;
1196         __be32 *p;
1197
1198         p = reserve_space(xdr, 8 + len);
1199         *p++ = cpu_to_be32(OP_LOOKUP);
1200         xdr_encode_opaque(p, name->name, len);
1201         hdr->nops++;
1202         hdr->replen += decode_lookup_maxsz;
1203 }
1204
1205 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1206 {
1207         __be32 *p;
1208
1209         p = reserve_space(xdr, 8);
1210         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1211         case FMODE_READ:
1212                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1213                 break;
1214         case FMODE_WRITE:
1215                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1216                 break;
1217         case FMODE_READ|FMODE_WRITE:
1218                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1219                 break;
1220         default:
1221                 *p++ = cpu_to_be32(0);
1222         }
1223         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1224 }
1225
1226 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1227 {
1228         __be32 *p;
1229  /*
1230  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1231  * owner 4 = 32
1232  */
1233         p = reserve_space(xdr, 8);
1234         *p++ = cpu_to_be32(OP_OPEN);
1235         *p = cpu_to_be32(arg->seqid->sequence->counter);
1236         encode_share_access(xdr, arg->fmode);
1237         p = reserve_space(xdr, 32);
1238         p = xdr_encode_hyper(p, arg->clientid);
1239         *p++ = cpu_to_be32(20);
1240         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1241         *p++ = cpu_to_be32(arg->server->s_dev);
1242         xdr_encode_hyper(p, arg->id);
1243 }
1244
1245 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1246 {
1247         __be32 *p;
1248         struct nfs_client *clp;
1249
1250         p = reserve_space(xdr, 4);
1251         switch(arg->open_flags & O_EXCL) {
1252         case 0:
1253                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1254                 encode_attrs(xdr, arg->u.attrs, arg->server);
1255                 break;
1256         default:
1257                 clp = arg->server->nfs_client;
1258                 if (clp->cl_mvops->minor_version > 0) {
1259                         if (nfs4_has_persistent_session(clp)) {
1260                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1261                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1262                         } else {
1263                                 struct iattr dummy;
1264
1265                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1266                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1267                                 dummy.ia_valid = 0;
1268                                 encode_attrs(xdr, &dummy, arg->server);
1269                         }
1270                 } else {
1271                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1272                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1273                 }
1274         }
1275 }
1276
1277 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1278 {
1279         __be32 *p;
1280
1281         p = reserve_space(xdr, 4);
1282         switch (arg->open_flags & O_CREAT) {
1283         case 0:
1284                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1285                 break;
1286         default:
1287                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1288                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1289                 encode_createmode(xdr, arg);
1290         }
1291 }
1292
1293 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1294 {
1295         __be32 *p;
1296
1297         p = reserve_space(xdr, 4);
1298         switch (delegation_type) {
1299         case 0:
1300                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1301                 break;
1302         case FMODE_READ:
1303                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1304                 break;
1305         case FMODE_WRITE|FMODE_READ:
1306                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1307                 break;
1308         default:
1309                 BUG();
1310         }
1311 }
1312
1313 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1314 {
1315         __be32 *p;
1316
1317         p = reserve_space(xdr, 4);
1318         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1319         encode_string(xdr, name->len, name->name);
1320 }
1321
1322 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1323 {
1324         __be32 *p;
1325
1326         p = reserve_space(xdr, 4);
1327         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1328         encode_delegation_type(xdr, type);
1329 }
1330
1331 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1332 {
1333         __be32 *p;
1334
1335         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1336         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1337         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1338         encode_string(xdr, name->len, name->name);
1339 }
1340
1341 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1342 {
1343         encode_openhdr(xdr, arg);
1344         encode_opentype(xdr, arg);
1345         switch (arg->claim) {
1346         case NFS4_OPEN_CLAIM_NULL:
1347                 encode_claim_null(xdr, arg->name);
1348                 break;
1349         case NFS4_OPEN_CLAIM_PREVIOUS:
1350                 encode_claim_previous(xdr, arg->u.delegation_type);
1351                 break;
1352         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1353                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1354                 break;
1355         default:
1356                 BUG();
1357         }
1358         hdr->nops++;
1359         hdr->replen += decode_open_maxsz;
1360 }
1361
1362 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1363 {
1364         __be32 *p;
1365
1366         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1367         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1368         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1369         *p = cpu_to_be32(arg->seqid->sequence->counter);
1370         hdr->nops++;
1371         hdr->replen += decode_open_confirm_maxsz;
1372 }
1373
1374 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1375 {
1376         __be32 *p;
1377
1378         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1379         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1380         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1381         *p = cpu_to_be32(arg->seqid->sequence->counter);
1382         encode_share_access(xdr, arg->fmode);
1383         hdr->nops++;
1384         hdr->replen += decode_open_downgrade_maxsz;
1385 }
1386
1387 static void
1388 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1389 {
1390         int len = fh->size;
1391         __be32 *p;
1392
1393         p = reserve_space(xdr, 8 + len);
1394         *p++ = cpu_to_be32(OP_PUTFH);
1395         xdr_encode_opaque(p, fh->data, len);
1396         hdr->nops++;
1397         hdr->replen += decode_putfh_maxsz;
1398 }
1399
1400 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1401 {
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 4);
1405         *p = cpu_to_be32(OP_PUTROOTFH);
1406         hdr->nops++;
1407         hdr->replen += decode_putrootfh_maxsz;
1408 }
1409
1410 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1411 {
1412         nfs4_stateid stateid;
1413         __be32 *p;
1414
1415         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1416         if (ctx->state != NULL) {
1417                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1418                 if (zero_seqid)
1419                         stateid.stateid.seqid = 0;
1420                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1421         } else
1422                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1423 }
1424
1425 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1426 {
1427         __be32 *p;
1428
1429         p = reserve_space(xdr, 4);
1430         *p = cpu_to_be32(OP_READ);
1431
1432         encode_stateid(xdr, args->context, args->lock_context,
1433                        hdr->minorversion);
1434
1435         p = reserve_space(xdr, 12);
1436         p = xdr_encode_hyper(p, args->offset);
1437         *p = cpu_to_be32(args->count);
1438         hdr->nops++;
1439         hdr->replen += decode_read_maxsz;
1440 }
1441
1442 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1443 {
1444         uint32_t attrs[2] = {0, 0};
1445         uint32_t dircount = readdir->count >> 1;
1446         __be32 *p;
1447
1448         if (readdir->plus) {
1449                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1450                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1451                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1452                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1453                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1454                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1455                 dircount >>= 1;
1456         }
1457         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1458         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1459         /* Switch to mounted_on_fileid if the server supports it */
1460         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1461                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1462         else
1463                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1464
1465         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1466         *p++ = cpu_to_be32(OP_READDIR);
1467         p = xdr_encode_hyper(p, readdir->cookie);
1468         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1469         *p++ = cpu_to_be32(dircount);
1470         *p++ = cpu_to_be32(readdir->count);
1471         *p++ = cpu_to_be32(2);
1472
1473         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1474         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1475         hdr->nops++;
1476         hdr->replen += decode_readdir_maxsz;
1477         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1478                         __func__,
1479                         (unsigned long long)readdir->cookie,
1480                         ((u32 *)readdir->verifier.data)[0],
1481                         ((u32 *)readdir->verifier.data)[1],
1482                         attrs[0] & readdir->bitmask[0],
1483                         attrs[1] & readdir->bitmask[1]);
1484 }
1485
1486 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1487 {
1488         __be32 *p;
1489
1490         p = reserve_space(xdr, 4);
1491         *p = cpu_to_be32(OP_READLINK);
1492         hdr->nops++;
1493         hdr->replen += decode_readlink_maxsz;
1494 }
1495
1496 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1497 {
1498         __be32 *p;
1499
1500         p = reserve_space(xdr, 8 + name->len);
1501         *p++ = cpu_to_be32(OP_REMOVE);
1502         xdr_encode_opaque(p, name->name, name->len);
1503         hdr->nops++;
1504         hdr->replen += decode_remove_maxsz;
1505 }
1506
1507 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 4);
1512         *p = cpu_to_be32(OP_RENAME);
1513         encode_string(xdr, oldname->len, oldname->name);
1514         encode_string(xdr, newname->len, newname->name);
1515         hdr->nops++;
1516         hdr->replen += decode_rename_maxsz;
1517 }
1518
1519 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1520 {
1521         __be32 *p;
1522
1523         p = reserve_space(xdr, 12);
1524         *p++ = cpu_to_be32(OP_RENEW);
1525         xdr_encode_hyper(p, client_stateid->cl_clientid);
1526         hdr->nops++;
1527         hdr->replen += decode_renew_maxsz;
1528 }
1529
1530 static void
1531 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1532 {
1533         __be32 *p;
1534
1535         p = reserve_space(xdr, 4);
1536         *p = cpu_to_be32(OP_RESTOREFH);
1537         hdr->nops++;
1538         hdr->replen += decode_restorefh_maxsz;
1539 }
1540
1541 static void
1542 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1543 {
1544         __be32 *p;
1545
1546         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1547         *p++ = cpu_to_be32(OP_SETATTR);
1548         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1549         p = reserve_space(xdr, 2*4);
1550         *p++ = cpu_to_be32(1);
1551         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1552         BUG_ON(arg->acl_len % 4);
1553         p = reserve_space(xdr, 4);
1554         *p = cpu_to_be32(arg->acl_len);
1555         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1556         hdr->nops++;
1557         hdr->replen += decode_setacl_maxsz;
1558 }
1559
1560 static void
1561 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1562 {
1563         __be32 *p;
1564
1565         p = reserve_space(xdr, 4);
1566         *p = cpu_to_be32(OP_SAVEFH);
1567         hdr->nops++;
1568         hdr->replen += decode_savefh_maxsz;
1569 }
1570
1571 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1572 {
1573         __be32 *p;
1574
1575         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1576         *p++ = cpu_to_be32(OP_SETATTR);
1577         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1578         hdr->nops++;
1579         hdr->replen += decode_setattr_maxsz;
1580         encode_attrs(xdr, arg->iap, server);
1581 }
1582
1583 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1584 {
1585         __be32 *p;
1586
1587         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1588         *p++ = cpu_to_be32(OP_SETCLIENTID);
1589         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1590
1591         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1592         p = reserve_space(xdr, 4);
1593         *p = cpu_to_be32(setclientid->sc_prog);
1594         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1595         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1596         p = reserve_space(xdr, 4);
1597         *p = cpu_to_be32(setclientid->sc_cb_ident);
1598         hdr->nops++;
1599         hdr->replen += decode_setclientid_maxsz;
1600 }
1601
1602 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1603 {
1604         __be32 *p;
1605
1606         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1607         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1608         p = xdr_encode_hyper(p, arg->clientid);
1609         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1610         hdr->nops++;
1611         hdr->replen += decode_setclientid_confirm_maxsz;
1612 }
1613
1614 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1615 {
1616         __be32 *p;
1617
1618         p = reserve_space(xdr, 4);
1619         *p = cpu_to_be32(OP_WRITE);
1620
1621         encode_stateid(xdr, args->context, args->lock_context,
1622                        hdr->minorversion);
1623
1624         p = reserve_space(xdr, 16);
1625         p = xdr_encode_hyper(p, args->offset);
1626         *p++ = cpu_to_be32(args->stable);
1627         *p = cpu_to_be32(args->count);
1628
1629         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1630         hdr->nops++;
1631         hdr->replen += decode_write_maxsz;
1632 }
1633
1634 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1635 {
1636         __be32 *p;
1637
1638         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1639
1640         *p++ = cpu_to_be32(OP_DELEGRETURN);
1641         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1642         hdr->nops++;
1643         hdr->replen += decode_delegreturn_maxsz;
1644 }
1645
1646 #if defined(CONFIG_NFS_V4_1)
1647 /* NFSv4.1 operations */
1648 static void encode_exchange_id(struct xdr_stream *xdr,
1649                                struct nfs41_exchange_id_args *args,
1650                                struct compound_hdr *hdr)
1651 {
1652         __be32 *p;
1653
1654         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1655         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1656         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1657
1658         encode_string(xdr, args->id_len, args->id);
1659
1660         p = reserve_space(xdr, 12);
1661         *p++ = cpu_to_be32(args->flags);
1662         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1663         *p = cpu_to_be32(0);    /* zero length implementation id array */
1664         hdr->nops++;
1665         hdr->replen += decode_exchange_id_maxsz;
1666 }
1667
1668 static void encode_create_session(struct xdr_stream *xdr,
1669                                   struct nfs41_create_session_args *args,
1670                                   struct compound_hdr *hdr)
1671 {
1672         __be32 *p;
1673         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1674         uint32_t len;
1675         struct nfs_client *clp = args->client;
1676         u32 max_resp_sz_cached;
1677
1678         /*
1679          * Assumes OPEN is the biggest non-idempotent compound.
1680          * 2 is the verifier.
1681          */
1682         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1683                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1684
1685         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1686                         clp->cl_ipaddr);
1687
1688         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1689         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1690         p = xdr_encode_hyper(p, clp->cl_clientid);
1691         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1692         *p++ = cpu_to_be32(args->flags);                        /*flags */
1693
1694         /* Fore Channel */
1695         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1696         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1697         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1698         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1699         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1700         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1701         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1702
1703         /* Back Channel */
1704         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1705         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1706         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1707         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1708         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1709         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1710         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1711
1712         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1713         *p++ = cpu_to_be32(1);
1714         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1715
1716         /* authsys_parms rfc1831 */
1717         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1718         p = xdr_encode_opaque(p, machine_name, len);
1719         *p++ = cpu_to_be32(0);                          /* UID */
1720         *p++ = cpu_to_be32(0);                          /* GID */
1721         *p = cpu_to_be32(0);                            /* No more gids */
1722         hdr->nops++;
1723         hdr->replen += decode_create_session_maxsz;
1724 }
1725
1726 static void encode_destroy_session(struct xdr_stream *xdr,
1727                                    struct nfs4_session *session,
1728                                    struct compound_hdr *hdr)
1729 {
1730         __be32 *p;
1731         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1732         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1733         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1734         hdr->nops++;
1735         hdr->replen += decode_destroy_session_maxsz;
1736 }
1737
1738 static void encode_reclaim_complete(struct xdr_stream *xdr,
1739                                     struct nfs41_reclaim_complete_args *args,
1740                                     struct compound_hdr *hdr)
1741 {
1742         __be32 *p;
1743
1744         p = reserve_space(xdr, 8);
1745         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1746         *p++ = cpu_to_be32(args->one_fs);
1747         hdr->nops++;
1748         hdr->replen += decode_reclaim_complete_maxsz;
1749 }
1750 #endif /* CONFIG_NFS_V4_1 */
1751
1752 static void encode_sequence(struct xdr_stream *xdr,
1753                             const struct nfs4_sequence_args *args,
1754                             struct compound_hdr *hdr)
1755 {
1756 #if defined(CONFIG_NFS_V4_1)
1757         struct nfs4_session *session = args->sa_session;
1758         struct nfs4_slot_table *tp;
1759         struct nfs4_slot *slot;
1760         __be32 *p;
1761
1762         if (!session)
1763                 return;
1764
1765         tp = &session->fc_slot_table;
1766
1767         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1768         slot = tp->slots + args->sa_slotid;
1769
1770         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1771         *p++ = cpu_to_be32(OP_SEQUENCE);
1772
1773         /*
1774          * Sessionid + seqid + slotid + max slotid + cache_this
1775          */
1776         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1777                 "max_slotid=%d cache_this=%d\n",
1778                 __func__,
1779                 ((u32 *)session->sess_id.data)[0],
1780                 ((u32 *)session->sess_id.data)[1],
1781                 ((u32 *)session->sess_id.data)[2],
1782                 ((u32 *)session->sess_id.data)[3],
1783                 slot->seq_nr, args->sa_slotid,
1784                 tp->highest_used_slotid, args->sa_cache_this);
1785         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1786         *p++ = cpu_to_be32(slot->seq_nr);
1787         *p++ = cpu_to_be32(args->sa_slotid);
1788         *p++ = cpu_to_be32(tp->highest_used_slotid);
1789         *p = cpu_to_be32(args->sa_cache_this);
1790         hdr->nops++;
1791         hdr->replen += decode_sequence_maxsz;
1792 #endif /* CONFIG_NFS_V4_1 */
1793 }
1794
1795 #ifdef CONFIG_NFS_V4_1
1796 static void
1797 encode_getdeviceinfo(struct xdr_stream *xdr,
1798                      const struct nfs4_getdeviceinfo_args *args,
1799                      struct compound_hdr *hdr)
1800 {
1801         __be32 *p;
1802
1803         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1804         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1805         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1806                                     NFS4_DEVICEID4_SIZE);
1807         *p++ = cpu_to_be32(args->pdev->layout_type);
1808         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1809         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1810         hdr->nops++;
1811         hdr->replen += decode_getdeviceinfo_maxsz;
1812 }
1813
1814 static void
1815 encode_layoutget(struct xdr_stream *xdr,
1816                       const struct nfs4_layoutget_args *args,
1817                       struct compound_hdr *hdr)
1818 {
1819         __be32 *p;
1820
1821         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1822         *p++ = cpu_to_be32(OP_LAYOUTGET);
1823         *p++ = cpu_to_be32(0);     /* Signal layout available */
1824         *p++ = cpu_to_be32(args->type);
1825         *p++ = cpu_to_be32(args->range.iomode);
1826         p = xdr_encode_hyper(p, args->range.offset);
1827         p = xdr_encode_hyper(p, args->range.length);
1828         p = xdr_encode_hyper(p, args->minlength);
1829         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1830         *p = cpu_to_be32(args->maxcount);
1831
1832         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1833                 __func__,
1834                 args->type,
1835                 args->range.iomode,
1836                 (unsigned long)args->range.offset,
1837                 (unsigned long)args->range.length,
1838                 args->maxcount);
1839         hdr->nops++;
1840         hdr->replen += decode_layoutget_maxsz;
1841 }
1842
1843 static int
1844 encode_layoutcommit(struct xdr_stream *xdr,
1845                     const struct nfs4_layoutcommit_args *args,
1846                     struct compound_hdr *hdr)
1847 {
1848         __be32 *p;
1849
1850         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1851                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1852
1853         p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
1854         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1855         /* Only whole file layouts */
1856         p = xdr_encode_hyper(p, 0); /* offset */
1857         p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
1858         *p++ = cpu_to_be32(0); /* reclaim */
1859         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1860         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1861         p = xdr_encode_hyper(p, args->lastbytewritten);
1862         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1863         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1864         *p++ = cpu_to_be32(0); /* no file layout payload */
1865
1866         hdr->nops++;
1867         hdr->replen += decode_layoutcommit_maxsz;
1868         return 0;
1869 }
1870 #endif /* CONFIG_NFS_V4_1 */
1871
1872 /*
1873  * END OF "GENERIC" ENCODE ROUTINES.
1874  */
1875
1876 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1877 {
1878 #if defined(CONFIG_NFS_V4_1)
1879         if (args->sa_session)
1880                 return args->sa_session->clp->cl_mvops->minor_version;
1881 #endif /* CONFIG_NFS_V4_1 */
1882         return 0;
1883 }
1884
1885 /*
1886  * Encode an ACCESS request
1887  */
1888 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1889                                 const struct nfs4_accessargs *args)
1890 {
1891         struct compound_hdr hdr = {
1892                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1893         };
1894
1895         encode_compound_hdr(xdr, req, &hdr);
1896         encode_sequence(xdr, &args->seq_args, &hdr);
1897         encode_putfh(xdr, args->fh, &hdr);
1898         encode_access(xdr, args->access, &hdr);
1899         encode_getfattr(xdr, args->bitmask, &hdr);
1900         encode_nops(&hdr);
1901 }
1902
1903 /*
1904  * Encode LOOKUP request
1905  */
1906 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1907                                 const struct nfs4_lookup_arg *args)
1908 {
1909         struct compound_hdr hdr = {
1910                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1911         };
1912
1913         encode_compound_hdr(xdr, req, &hdr);
1914         encode_sequence(xdr, &args->seq_args, &hdr);
1915         encode_putfh(xdr, args->dir_fh, &hdr);
1916         encode_lookup(xdr, args->name, &hdr);
1917         encode_getfh(xdr, &hdr);
1918         encode_getfattr(xdr, args->bitmask, &hdr);
1919         encode_nops(&hdr);
1920 }
1921
1922 /*
1923  * Encode LOOKUP_ROOT request
1924  */
1925 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1926                                      struct xdr_stream *xdr,
1927                                      const struct nfs4_lookup_root_arg *args)
1928 {
1929         struct compound_hdr hdr = {
1930                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1931         };
1932
1933         encode_compound_hdr(xdr, req, &hdr);
1934         encode_sequence(xdr, &args->seq_args, &hdr);
1935         encode_putrootfh(xdr, &hdr);
1936         encode_getfh(xdr, &hdr);
1937         encode_getfattr(xdr, args->bitmask, &hdr);
1938         encode_nops(&hdr);
1939 }
1940
1941 /*
1942  * Encode REMOVE request
1943  */
1944 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1945                                 const struct nfs_removeargs *args)
1946 {
1947         struct compound_hdr hdr = {
1948                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1949         };
1950
1951         encode_compound_hdr(xdr, req, &hdr);
1952         encode_sequence(xdr, &args->seq_args, &hdr);
1953         encode_putfh(xdr, args->fh, &hdr);
1954         encode_remove(xdr, &args->name, &hdr);
1955         encode_getfattr(xdr, args->bitmask, &hdr);
1956         encode_nops(&hdr);
1957 }
1958
1959 /*
1960  * Encode RENAME request
1961  */
1962 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1963                                 const struct nfs_renameargs *args)
1964 {
1965         struct compound_hdr hdr = {
1966                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1967         };
1968
1969         encode_compound_hdr(xdr, req, &hdr);
1970         encode_sequence(xdr, &args->seq_args, &hdr);
1971         encode_putfh(xdr, args->old_dir, &hdr);
1972         encode_savefh(xdr, &hdr);
1973         encode_putfh(xdr, args->new_dir, &hdr);
1974         encode_rename(xdr, args->old_name, args->new_name, &hdr);
1975         encode_getfattr(xdr, args->bitmask, &hdr);
1976         encode_restorefh(xdr, &hdr);
1977         encode_getfattr(xdr, args->bitmask, &hdr);
1978         encode_nops(&hdr);
1979 }
1980
1981 /*
1982  * Encode LINK request
1983  */
1984 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
1985                              const struct nfs4_link_arg *args)
1986 {
1987         struct compound_hdr hdr = {
1988                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1989         };
1990
1991         encode_compound_hdr(xdr, req, &hdr);
1992         encode_sequence(xdr, &args->seq_args, &hdr);
1993         encode_putfh(xdr, args->fh, &hdr);
1994         encode_savefh(xdr, &hdr);
1995         encode_putfh(xdr, args->dir_fh, &hdr);
1996         encode_link(xdr, args->name, &hdr);
1997         encode_getfattr(xdr, args->bitmask, &hdr);
1998         encode_restorefh(xdr, &hdr);
1999         encode_getfattr(xdr, args->bitmask, &hdr);
2000         encode_nops(&hdr);
2001 }
2002
2003 /*
2004  * Encode CREATE request
2005  */
2006 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2007                                 const struct nfs4_create_arg *args)
2008 {
2009         struct compound_hdr hdr = {
2010                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2011         };
2012
2013         encode_compound_hdr(xdr, req, &hdr);
2014         encode_sequence(xdr, &args->seq_args, &hdr);
2015         encode_putfh(xdr, args->dir_fh, &hdr);
2016         encode_savefh(xdr, &hdr);
2017         encode_create(xdr, args, &hdr);
2018         encode_getfh(xdr, &hdr);
2019         encode_getfattr(xdr, args->bitmask, &hdr);
2020         encode_restorefh(xdr, &hdr);
2021         encode_getfattr(xdr, args->bitmask, &hdr);
2022         encode_nops(&hdr);
2023 }
2024
2025 /*
2026  * Encode SYMLINK request
2027  */
2028 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2029                                  const struct nfs4_create_arg *args)
2030 {
2031         nfs4_xdr_enc_create(req, xdr, args);
2032 }
2033
2034 /*
2035  * Encode GETATTR request
2036  */
2037 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2038                                  const struct nfs4_getattr_arg *args)
2039 {
2040         struct compound_hdr hdr = {
2041                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2042         };
2043
2044         encode_compound_hdr(xdr, req, &hdr);
2045         encode_sequence(xdr, &args->seq_args, &hdr);
2046         encode_putfh(xdr, args->fh, &hdr);
2047         encode_getfattr(xdr, args->bitmask, &hdr);
2048         encode_nops(&hdr);
2049 }
2050
2051 /*
2052  * Encode a CLOSE request
2053  */
2054 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2055                                struct nfs_closeargs *args)
2056 {
2057         struct compound_hdr hdr = {
2058                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2059         };
2060
2061         encode_compound_hdr(xdr, req, &hdr);
2062         encode_sequence(xdr, &args->seq_args, &hdr);
2063         encode_putfh(xdr, args->fh, &hdr);
2064         encode_close(xdr, args, &hdr);
2065         encode_getfattr(xdr, args->bitmask, &hdr);
2066         encode_nops(&hdr);
2067 }
2068
2069 /*
2070  * Encode an OPEN request
2071  */
2072 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2073                               struct nfs_openargs *args)
2074 {
2075         struct compound_hdr hdr = {
2076                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2077         };
2078
2079         encode_compound_hdr(xdr, req, &hdr);
2080         encode_sequence(xdr, &args->seq_args, &hdr);
2081         encode_putfh(xdr, args->fh, &hdr);
2082         encode_savefh(xdr, &hdr);
2083         encode_open(xdr, args, &hdr);
2084         encode_getfh(xdr, &hdr);
2085         encode_getfattr(xdr, args->bitmask, &hdr);
2086         encode_restorefh(xdr, &hdr);
2087         encode_getfattr(xdr, args->bitmask, &hdr);
2088         encode_nops(&hdr);
2089 }
2090
2091 /*
2092  * Encode an OPEN_CONFIRM request
2093  */
2094 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2095                                       struct xdr_stream *xdr,
2096                                       struct nfs_open_confirmargs *args)
2097 {
2098         struct compound_hdr hdr = {
2099                 .nops   = 0,
2100         };
2101
2102         encode_compound_hdr(xdr, req, &hdr);
2103         encode_putfh(xdr, args->fh, &hdr);
2104         encode_open_confirm(xdr, args, &hdr);
2105         encode_nops(&hdr);
2106 }
2107
2108 /*
2109  * Encode an OPEN request with no attributes.
2110  */
2111 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2112                                      struct xdr_stream *xdr,
2113                                      struct nfs_openargs *args)
2114 {
2115         struct compound_hdr hdr = {
2116                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2117         };
2118
2119         encode_compound_hdr(xdr, req, &hdr);
2120         encode_sequence(xdr, &args->seq_args, &hdr);
2121         encode_putfh(xdr, args->fh, &hdr);
2122         encode_open(xdr, args, &hdr);
2123         encode_getfattr(xdr, args->bitmask, &hdr);
2124         encode_nops(&hdr);
2125 }
2126
2127 /*
2128  * Encode an OPEN_DOWNGRADE request
2129  */
2130 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2131                                         struct xdr_stream *xdr,
2132                                         struct nfs_closeargs *args)
2133 {
2134         struct compound_hdr hdr = {
2135                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2136         };
2137
2138         encode_compound_hdr(xdr, req, &hdr);
2139         encode_sequence(xdr, &args->seq_args, &hdr);
2140         encode_putfh(xdr, args->fh, &hdr);
2141         encode_open_downgrade(xdr, args, &hdr);
2142         encode_getfattr(xdr, args->bitmask, &hdr);
2143         encode_nops(&hdr);
2144 }
2145
2146 /*
2147  * Encode a LOCK request
2148  */
2149 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2150                               struct nfs_lock_args *args)
2151 {
2152         struct compound_hdr hdr = {
2153                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2154         };
2155
2156         encode_compound_hdr(xdr, req, &hdr);
2157         encode_sequence(xdr, &args->seq_args, &hdr);
2158         encode_putfh(xdr, args->fh, &hdr);
2159         encode_lock(xdr, args, &hdr);
2160         encode_nops(&hdr);
2161 }
2162
2163 /*
2164  * Encode a LOCKT request
2165  */
2166 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2167                                struct nfs_lockt_args *args)
2168 {
2169         struct compound_hdr hdr = {
2170                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2171         };
2172
2173         encode_compound_hdr(xdr, req, &hdr);
2174         encode_sequence(xdr, &args->seq_args, &hdr);
2175         encode_putfh(xdr, args->fh, &hdr);
2176         encode_lockt(xdr, args, &hdr);
2177         encode_nops(&hdr);
2178 }
2179
2180 /*
2181  * Encode a LOCKU request
2182  */
2183 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2184                                struct nfs_locku_args *args)
2185 {
2186         struct compound_hdr hdr = {
2187                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2188         };
2189
2190         encode_compound_hdr(xdr, req, &hdr);
2191         encode_sequence(xdr, &args->seq_args, &hdr);
2192         encode_putfh(xdr, args->fh, &hdr);
2193         encode_locku(xdr, args, &hdr);
2194         encode_nops(&hdr);
2195 }
2196
2197 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2198                                            struct xdr_stream *xdr,
2199                                         struct nfs_release_lockowner_args *args)
2200 {
2201         struct compound_hdr hdr = {
2202                 .minorversion = 0,
2203         };
2204
2205         encode_compound_hdr(xdr, req, &hdr);
2206         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2207         encode_nops(&hdr);
2208 }
2209
2210 /*
2211  * Encode a READLINK request
2212  */
2213 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2214                                   const struct nfs4_readlink *args)
2215 {
2216         struct compound_hdr hdr = {
2217                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2218         };
2219
2220         encode_compound_hdr(xdr, req, &hdr);
2221         encode_sequence(xdr, &args->seq_args, &hdr);
2222         encode_putfh(xdr, args->fh, &hdr);
2223         encode_readlink(xdr, args, req, &hdr);
2224
2225         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2226                         args->pgbase, args->pglen);
2227         encode_nops(&hdr);
2228 }
2229
2230 /*
2231  * Encode a READDIR request
2232  */
2233 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2234                                  const struct nfs4_readdir_arg *args)
2235 {
2236         struct compound_hdr hdr = {
2237                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2238         };
2239
2240         encode_compound_hdr(xdr, req, &hdr);
2241         encode_sequence(xdr, &args->seq_args, &hdr);
2242         encode_putfh(xdr, args->fh, &hdr);
2243         encode_readdir(xdr, args, req, &hdr);
2244
2245         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2246                          args->pgbase, args->count);
2247         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2248                         __func__, hdr.replen << 2, args->pages,
2249                         args->pgbase, args->count);
2250         encode_nops(&hdr);
2251 }
2252
2253 /*
2254  * Encode a READ request
2255  */
2256 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2257                               struct nfs_readargs *args)
2258 {
2259         struct compound_hdr hdr = {
2260                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261         };
2262
2263         encode_compound_hdr(xdr, req, &hdr);
2264         encode_sequence(xdr, &args->seq_args, &hdr);
2265         encode_putfh(xdr, args->fh, &hdr);
2266         encode_read(xdr, args, &hdr);
2267
2268         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2269                          args->pages, args->pgbase, args->count);
2270         req->rq_rcv_buf.flags |= XDRBUF_READ;
2271         encode_nops(&hdr);
2272 }
2273
2274 /*
2275  * Encode an SETATTR request
2276  */
2277 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2278                                  struct nfs_setattrargs *args)
2279 {
2280         struct compound_hdr hdr = {
2281                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2282         };
2283
2284         encode_compound_hdr(xdr, req, &hdr);
2285         encode_sequence(xdr, &args->seq_args, &hdr);
2286         encode_putfh(xdr, args->fh, &hdr);
2287         encode_setattr(xdr, args, args->server, &hdr);
2288         encode_getfattr(xdr, args->bitmask, &hdr);
2289         encode_nops(&hdr);
2290 }
2291
2292 /*
2293  * Encode a GETACL request
2294  */
2295 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2296                                 struct nfs_getaclargs *args)
2297 {
2298         struct compound_hdr hdr = {
2299                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2300         };
2301         uint32_t replen;
2302
2303         encode_compound_hdr(xdr, req, &hdr);
2304         encode_sequence(xdr, &args->seq_args, &hdr);
2305         encode_putfh(xdr, args->fh, &hdr);
2306         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2307         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2308
2309         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2310                 args->acl_pages, args->acl_pgbase, args->acl_len);
2311         encode_nops(&hdr);
2312 }
2313
2314 /*
2315  * Encode a WRITE request
2316  */
2317 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2318                                struct nfs_writeargs *args)
2319 {
2320         struct compound_hdr hdr = {
2321                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2322         };
2323
2324         encode_compound_hdr(xdr, req, &hdr);
2325         encode_sequence(xdr, &args->seq_args, &hdr);
2326         encode_putfh(xdr, args->fh, &hdr);
2327         encode_write(xdr, args, &hdr);
2328         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2329         if (args->bitmask)
2330                 encode_getfattr(xdr, args->bitmask, &hdr);
2331         encode_nops(&hdr);
2332 }
2333
2334 /*
2335  *  a COMMIT request
2336  */
2337 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2338                                 struct nfs_writeargs *args)
2339 {
2340         struct compound_hdr hdr = {
2341                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2342         };
2343
2344         encode_compound_hdr(xdr, req, &hdr);
2345         encode_sequence(xdr, &args->seq_args, &hdr);
2346         encode_putfh(xdr, args->fh, &hdr);
2347         encode_commit(xdr, args, &hdr);
2348         if (args->bitmask)
2349                 encode_getfattr(xdr, args->bitmask, &hdr);
2350         encode_nops(&hdr);
2351 }
2352
2353 /*
2354  * FSINFO request
2355  */
2356 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2357                                 struct nfs4_fsinfo_arg *args)
2358 {
2359         struct compound_hdr hdr = {
2360                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2361         };
2362
2363         encode_compound_hdr(xdr, req, &hdr);
2364         encode_sequence(xdr, &args->seq_args, &hdr);
2365         encode_putfh(xdr, args->fh, &hdr);
2366         encode_fsinfo(xdr, args->bitmask, &hdr);
2367         encode_nops(&hdr);
2368 }
2369
2370 /*
2371  * a PATHCONF request
2372  */
2373 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2374                                   const struct nfs4_pathconf_arg *args)
2375 {
2376         struct compound_hdr hdr = {
2377                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2378         };
2379
2380         encode_compound_hdr(xdr, req, &hdr);
2381         encode_sequence(xdr, &args->seq_args, &hdr);
2382         encode_putfh(xdr, args->fh, &hdr);
2383         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2384                            &hdr);
2385         encode_nops(&hdr);
2386 }
2387
2388 /*
2389  * a STATFS request
2390  */
2391 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2392                                 const struct nfs4_statfs_arg *args)
2393 {
2394         struct compound_hdr hdr = {
2395                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2396         };
2397
2398         encode_compound_hdr(xdr, req, &hdr);
2399         encode_sequence(xdr, &args->seq_args, &hdr);
2400         encode_putfh(xdr, args->fh, &hdr);
2401         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2402                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2403         encode_nops(&hdr);
2404 }
2405
2406 /*
2407  * GETATTR_BITMAP request
2408  */
2409 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2410                                      struct xdr_stream *xdr,
2411                                      struct nfs4_server_caps_arg *args)
2412 {
2413         struct compound_hdr hdr = {
2414                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2415         };
2416
2417         encode_compound_hdr(xdr, req, &hdr);
2418         encode_sequence(xdr, &args->seq_args, &hdr);
2419         encode_putfh(xdr, args->fhandle, &hdr);
2420         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2421                            FATTR4_WORD0_LINK_SUPPORT|
2422                            FATTR4_WORD0_SYMLINK_SUPPORT|
2423                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2424         encode_nops(&hdr);
2425 }
2426
2427 /*
2428  * a RENEW request
2429  */
2430 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2431                                struct nfs_client *clp)
2432 {
2433         struct compound_hdr hdr = {
2434                 .nops   = 0,
2435         };
2436
2437         encode_compound_hdr(xdr, req, &hdr);
2438         encode_renew(xdr, clp, &hdr);
2439         encode_nops(&hdr);
2440 }
2441
2442 /*
2443  * a SETCLIENTID request
2444  */
2445 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2446                                      struct xdr_stream *xdr,
2447                                      struct nfs4_setclientid *sc)
2448 {
2449         struct compound_hdr hdr = {
2450                 .nops   = 0,
2451         };
2452
2453         encode_compound_hdr(xdr, req, &hdr);
2454         encode_setclientid(xdr, sc, &hdr);
2455         encode_nops(&hdr);
2456 }
2457
2458 /*
2459  * a SETCLIENTID_CONFIRM request
2460  */
2461 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2462                                              struct xdr_stream *xdr,
2463                                              struct nfs4_setclientid_res *arg)
2464 {
2465         struct compound_hdr hdr = {
2466                 .nops   = 0,
2467         };
2468         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2469
2470         encode_compound_hdr(xdr, req, &hdr);
2471         encode_setclientid_confirm(xdr, arg, &hdr);
2472         encode_putrootfh(xdr, &hdr);
2473         encode_fsinfo(xdr, lease_bitmap, &hdr);
2474         encode_nops(&hdr);
2475 }
2476
2477 /*
2478  * DELEGRETURN request
2479  */
2480 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2481                                      struct xdr_stream *xdr,
2482                                      const struct nfs4_delegreturnargs *args)
2483 {
2484         struct compound_hdr hdr = {
2485                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2486         };
2487
2488         encode_compound_hdr(xdr, req, &hdr);
2489         encode_sequence(xdr, &args->seq_args, &hdr);
2490         encode_putfh(xdr, args->fhandle, &hdr);
2491         encode_delegreturn(xdr, args->stateid, &hdr);
2492         encode_getfattr(xdr, args->bitmask, &hdr);
2493         encode_nops(&hdr);
2494 }
2495
2496 /*
2497  * Encode FS_LOCATIONS request
2498  */
2499 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2500                                       struct xdr_stream *xdr,
2501                                       struct nfs4_fs_locations_arg *args)
2502 {
2503         struct compound_hdr hdr = {
2504                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2505         };
2506         uint32_t replen;
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_sequence(xdr, &args->seq_args, &hdr);
2510         encode_putfh(xdr, args->dir_fh, &hdr);
2511         encode_lookup(xdr, args->name, &hdr);
2512         replen = hdr.replen;    /* get the attribute into args->page */
2513         encode_fs_locations(xdr, args->bitmask, &hdr);
2514
2515         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2516                         0, PAGE_SIZE);
2517         encode_nops(&hdr);
2518 }
2519
2520 #if defined(CONFIG_NFS_V4_1)
2521 /*
2522  * EXCHANGE_ID request
2523  */
2524 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2525                                      struct xdr_stream *xdr,
2526                                      struct nfs41_exchange_id_args *args)
2527 {
2528         struct compound_hdr hdr = {
2529                 .minorversion = args->client->cl_mvops->minor_version,
2530         };
2531
2532         encode_compound_hdr(xdr, req, &hdr);
2533         encode_exchange_id(xdr, args, &hdr);
2534         encode_nops(&hdr);
2535 }
2536
2537 /*
2538  * a CREATE_SESSION request
2539  */
2540 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2541                                         struct xdr_stream *xdr,
2542                                         struct nfs41_create_session_args *args)
2543 {
2544         struct compound_hdr hdr = {
2545                 .minorversion = args->client->cl_mvops->minor_version,
2546         };
2547
2548         encode_compound_hdr(xdr, req, &hdr);
2549         encode_create_session(xdr, args, &hdr);
2550         encode_nops(&hdr);
2551 }
2552
2553 /*
2554  * a DESTROY_SESSION request
2555  */
2556 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2557                                          struct xdr_stream *xdr,
2558                                          struct nfs4_session *session)
2559 {
2560         struct compound_hdr hdr = {
2561                 .minorversion = session->clp->cl_mvops->minor_version,
2562         };
2563
2564         encode_compound_hdr(xdr, req, &hdr);
2565         encode_destroy_session(xdr, session, &hdr);
2566         encode_nops(&hdr);
2567 }
2568
2569 /*
2570  * a SEQUENCE request
2571  */
2572 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2573                                   struct nfs4_sequence_args *args)
2574 {
2575         struct compound_hdr hdr = {
2576                 .minorversion = nfs4_xdr_minorversion(args),
2577         };
2578
2579         encode_compound_hdr(xdr, req, &hdr);
2580         encode_sequence(xdr, args, &hdr);
2581         encode_nops(&hdr);
2582 }
2583
2584 /*
2585  * a GET_LEASE_TIME request
2586  */
2587 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2588                                         struct xdr_stream *xdr,
2589                                         struct nfs4_get_lease_time_args *args)
2590 {
2591         struct compound_hdr hdr = {
2592                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2593         };
2594         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2595
2596         encode_compound_hdr(xdr, req, &hdr);
2597         encode_sequence(xdr, &args->la_seq_args, &hdr);
2598         encode_putrootfh(xdr, &hdr);
2599         encode_fsinfo(xdr, lease_bitmap, &hdr);
2600         encode_nops(&hdr);
2601 }
2602
2603 /*
2604  * a RECLAIM_COMPLETE request
2605  */
2606 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2607                                           struct xdr_stream *xdr,
2608                                 struct nfs41_reclaim_complete_args *args)
2609 {
2610         struct compound_hdr hdr = {
2611                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2612         };
2613
2614         encode_compound_hdr(xdr, req, &hdr);
2615         encode_sequence(xdr, &args->seq_args, &hdr);
2616         encode_reclaim_complete(xdr, args, &hdr);
2617         encode_nops(&hdr);
2618 }
2619
2620 /*
2621  * Encode GETDEVICEINFO request
2622  */
2623 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2624                                        struct xdr_stream *xdr,
2625                                        struct nfs4_getdeviceinfo_args *args)
2626 {
2627         struct compound_hdr hdr = {
2628                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2629         };
2630
2631         encode_compound_hdr(xdr, req, &hdr);
2632         encode_sequence(xdr, &args->seq_args, &hdr);
2633         encode_getdeviceinfo(xdr, args, &hdr);
2634
2635         /* set up reply kvec. Subtract notification bitmap max size (2)
2636          * so that notification bitmap is put in xdr_buf tail */
2637         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2638                          args->pdev->pages, args->pdev->pgbase,
2639                          args->pdev->pglen);
2640
2641         encode_nops(&hdr);
2642 }
2643
2644 /*
2645  *  Encode LAYOUTGET request
2646  */
2647 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2648                                    struct xdr_stream *xdr,
2649                                    struct nfs4_layoutget_args *args)
2650 {
2651         struct compound_hdr hdr = {
2652                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_sequence(xdr, &args->seq_args, &hdr);
2657         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2658         encode_layoutget(xdr, args, &hdr);
2659
2660         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2661             args->layout.pages, 0, args->layout.pglen);
2662
2663         encode_nops(&hdr);
2664 }
2665
2666 /*
2667  *  Encode LAYOUTCOMMIT request
2668  */
2669 static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2670                                      struct xdr_stream *xdr,
2671                                      struct nfs4_layoutcommit_args *args)
2672 {
2673         struct compound_hdr hdr = {
2674                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2675         };
2676
2677         encode_compound_hdr(xdr, req, &hdr);
2678         encode_sequence(xdr, &args->seq_args, &hdr);
2679         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2680         encode_layoutcommit(xdr, args, &hdr);
2681         encode_getfattr(xdr, args->bitmask, &hdr);
2682         encode_nops(&hdr);
2683         return 0;
2684 }
2685 #endif /* CONFIG_NFS_V4_1 */
2686
2687 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2688 {
2689         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2690                 "Remaining buffer length is %tu words.\n",
2691                 func, xdr->end - xdr->p);
2692 }
2693
2694 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2695 {
2696         __be32 *p;
2697
2698         p = xdr_inline_decode(xdr, 4);
2699         if (unlikely(!p))
2700                 goto out_overflow;
2701         *len = be32_to_cpup(p);
2702         p = xdr_inline_decode(xdr, *len);
2703         if (unlikely(!p))
2704                 goto out_overflow;
2705         *string = (char *)p;
2706         return 0;
2707 out_overflow:
2708         print_overflow_msg(__func__, xdr);
2709         return -EIO;
2710 }
2711
2712 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2713 {
2714         __be32 *p;
2715
2716         p = xdr_inline_decode(xdr, 8);
2717         if (unlikely(!p))
2718                 goto out_overflow;
2719         hdr->status = be32_to_cpup(p++);
2720         hdr->taglen = be32_to_cpup(p);
2721
2722         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2723         if (unlikely(!p))
2724                 goto out_overflow;
2725         hdr->tag = (char *)p;
2726         p += XDR_QUADLEN(hdr->taglen);
2727         hdr->nops = be32_to_cpup(p);
2728         if (unlikely(hdr->nops < 1))
2729                 return nfs4_stat_to_errno(hdr->status);
2730         return 0;
2731 out_overflow:
2732         print_overflow_msg(__func__, xdr);
2733         return -EIO;
2734 }
2735
2736 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2737 {
2738         __be32 *p;
2739         uint32_t opnum;
2740         int32_t nfserr;
2741
2742         p = xdr_inline_decode(xdr, 8);
2743         if (unlikely(!p))
2744                 goto out_overflow;
2745         opnum = be32_to_cpup(p++);
2746         if (opnum != expected) {
2747                 dprintk("nfs: Server returned operation"
2748                         " %d but we issued a request for %d\n",
2749                                 opnum, expected);
2750                 return -EIO;
2751         }
2752         nfserr = be32_to_cpup(p);
2753         if (nfserr != NFS_OK)
2754                 return nfs4_stat_to_errno(nfserr);
2755         return 0;
2756 out_overflow:
2757         print_overflow_msg(__func__, xdr);
2758         return -EIO;
2759 }
2760
2761 /* Dummy routine */
2762 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2763 {
2764         __be32 *p;
2765         unsigned int strlen;
2766         char *str;
2767
2768         p = xdr_inline_decode(xdr, 12);
2769         if (likely(p))
2770                 return decode_opaque_inline(xdr, &strlen, &str);
2771         print_overflow_msg(__func__, xdr);
2772         return -EIO;
2773 }
2774
2775 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2776 {
2777         uint32_t bmlen;
2778         __be32 *p;
2779
2780         p = xdr_inline_decode(xdr, 4);
2781         if (unlikely(!p))
2782                 goto out_overflow;
2783         bmlen = be32_to_cpup(p);
2784
2785         bitmap[0] = bitmap[1] = 0;
2786         p = xdr_inline_decode(xdr, (bmlen << 2));
2787         if (unlikely(!p))
2788                 goto out_overflow;
2789         if (bmlen > 0) {
2790                 bitmap[0] = be32_to_cpup(p++);
2791                 if (bmlen > 1)
2792                         bitmap[1] = be32_to_cpup(p);
2793         }
2794         return 0;
2795 out_overflow:
2796         print_overflow_msg(__func__, xdr);
2797         return -EIO;
2798 }
2799
2800 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2801 {
2802         __be32 *p;
2803
2804         p = xdr_inline_decode(xdr, 4);
2805         if (unlikely(!p))
2806                 goto out_overflow;
2807         *attrlen = be32_to_cpup(p);
2808         *savep = xdr->p;
2809         return 0;
2810 out_overflow:
2811         print_overflow_msg(__func__, xdr);
2812         return -EIO;
2813 }
2814
2815 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2816 {
2817         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2818                 int ret;
2819                 ret = decode_attr_bitmap(xdr, bitmask);
2820                 if (unlikely(ret < 0))
2821                         return ret;
2822                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2823         } else
2824                 bitmask[0] = bitmask[1] = 0;
2825         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2826         return 0;
2827 }
2828
2829 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2830 {
2831         __be32 *p;
2832         int ret = 0;
2833
2834         *type = 0;
2835         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2836                 return -EIO;
2837         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2838                 p = xdr_inline_decode(xdr, 4);
2839                 if (unlikely(!p))
2840                         goto out_overflow;
2841                 *type = be32_to_cpup(p);
2842                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2843                         dprintk("%s: bad type %d\n", __func__, *type);
2844                         return -EIO;
2845                 }
2846                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2847                 ret = NFS_ATTR_FATTR_TYPE;
2848         }
2849         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2850         return ret;
2851 out_overflow:
2852         print_overflow_msg(__func__, xdr);
2853         return -EIO;
2854 }
2855
2856 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2857 {
2858         __be32 *p;
2859         int ret = 0;
2860
2861         *change = 0;
2862         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2863                 return -EIO;
2864         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2865                 p = xdr_inline_decode(xdr, 8);
2866                 if (unlikely(!p))
2867                         goto out_overflow;
2868                 xdr_decode_hyper(p, change);
2869                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2870                 ret = NFS_ATTR_FATTR_CHANGE;
2871         }
2872         dprintk("%s: change attribute=%Lu\n", __func__,
2873                         (unsigned long long)*change);
2874         return ret;
2875 out_overflow:
2876         print_overflow_msg(__func__, xdr);
2877         return -EIO;
2878 }
2879
2880 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2881 {
2882         __be32 *p;
2883         int ret = 0;
2884
2885         *size = 0;
2886         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2887                 return -EIO;
2888         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2889                 p = xdr_inline_decode(xdr, 8);
2890                 if (unlikely(!p))
2891                         goto out_overflow;
2892                 xdr_decode_hyper(p, size);
2893                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2894                 ret = NFS_ATTR_FATTR_SIZE;
2895         }
2896         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2897         return ret;
2898 out_overflow:
2899         print_overflow_msg(__func__, xdr);
2900         return -EIO;
2901 }
2902
2903 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2904 {
2905         __be32 *p;
2906
2907         *res = 0;
2908         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2909                 return -EIO;
2910         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2911                 p = xdr_inline_decode(xdr, 4);
2912                 if (unlikely(!p))
2913                         goto out_overflow;
2914                 *res = be32_to_cpup(p);
2915                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2916         }
2917         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2918         return 0;
2919 out_overflow:
2920         print_overflow_msg(__func__, xdr);
2921         return -EIO;
2922 }
2923
2924 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2925 {
2926         __be32 *p;
2927
2928         *res = 0;
2929         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2930                 return -EIO;
2931         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2932                 p = xdr_inline_decode(xdr, 4);
2933                 if (unlikely(!p))
2934                         goto out_overflow;
2935                 *res = be32_to_cpup(p);
2936                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2937         }
2938         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2939         return 0;
2940 out_overflow:
2941         print_overflow_msg(__func__, xdr);
2942         return -EIO;
2943 }
2944
2945 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2946 {
2947         __be32 *p;
2948         int ret = 0;
2949
2950         fsid->major = 0;
2951         fsid->minor = 0;
2952         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2953                 return -EIO;
2954         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2955                 p = xdr_inline_decode(xdr, 16);
2956                 if (unlikely(!p))
2957                         goto out_overflow;
2958                 p = xdr_decode_hyper(p, &fsid->major);
2959                 xdr_decode_hyper(p, &fsid->minor);
2960                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2961                 ret = NFS_ATTR_FATTR_FSID;
2962         }
2963         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2964                         (unsigned long long)fsid->major,
2965                         (unsigned long long)fsid->minor);
2966         return ret;
2967 out_overflow:
2968         print_overflow_msg(__func__, xdr);
2969         return -EIO;
2970 }
2971
2972 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2973 {
2974         __be32 *p;
2975
2976         *res = 60;
2977         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2978                 return -EIO;
2979         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2980                 p = xdr_inline_decode(xdr, 4);
2981                 if (unlikely(!p))
2982                         goto out_overflow;
2983                 *res = be32_to_cpup(p);
2984                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2985         }
2986         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2987         return 0;
2988 out_overflow:
2989         print_overflow_msg(__func__, xdr);
2990         return -EIO;
2991 }
2992
2993 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2994 {
2995         __be32 *p;
2996
2997         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2998                 return -EIO;
2999         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3000                 p = xdr_inline_decode(xdr, 4);
3001                 if (unlikely(!p))
3002                         goto out_overflow;
3003                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3004         }
3005         return 0;
3006 out_overflow:
3007         print_overflow_msg(__func__, xdr);
3008         return -EIO;
3009 }
3010
3011 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3012 {
3013         __be32 *p;
3014         int len;
3015
3016         if (fh != NULL)
3017                 memset(fh, 0, sizeof(*fh));
3018
3019         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3020                 return -EIO;
3021         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3022                 p = xdr_inline_decode(xdr, 4);
3023                 if (unlikely(!p))
3024                         goto out_overflow;
3025                 len = be32_to_cpup(p);
3026                 if (len > NFS4_FHSIZE)
3027                         return -EIO;
3028                 p = xdr_inline_decode(xdr, len);
3029                 if (unlikely(!p))
3030                         goto out_overflow;
3031                 if (fh != NULL) {
3032                         memcpy(fh->data, p, len);
3033                         fh->size = len;
3034                 }
3035                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3036         }
3037         return 0;
3038 out_overflow:
3039         print_overflow_msg(__func__, xdr);
3040         return -EIO;
3041 }
3042
3043 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3044 {
3045         __be32 *p;
3046
3047         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3048         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3049                 return -EIO;
3050         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3051                 p = xdr_inline_decode(xdr, 4);
3052                 if (unlikely(!p))
3053                         goto out_overflow;
3054                 *res = be32_to_cpup(p);
3055                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3056         }
3057         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3058         return 0;
3059 out_overflow:
3060         print_overflow_msg(__func__, xdr);
3061         return -EIO;
3062 }
3063
3064 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3065 {
3066         __be32 *p;
3067         int ret = 0;
3068
3069         *fileid = 0;
3070         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3071                 return -EIO;
3072         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3073                 p = xdr_inline_decode(xdr, 8);
3074                 if (unlikely(!p))
3075                         goto out_overflow;
3076                 xdr_decode_hyper(p, fileid);
3077                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3078                 ret = NFS_ATTR_FATTR_FILEID;
3079         }
3080         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3081         return ret;
3082 out_overflow:
3083         print_overflow_msg(__func__, xdr);
3084         return -EIO;
3085 }
3086
3087 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3088 {
3089         __be32 *p;
3090         int ret = 0;
3091
3092         *fileid = 0;
3093         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3094                 return -EIO;
3095         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3096                 p = xdr_inline_decode(xdr, 8);
3097                 if (unlikely(!p))
3098                         goto out_overflow;
3099                 xdr_decode_hyper(p, fileid);
3100                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3101                 ret = NFS_ATTR_FATTR_FILEID;
3102         }
3103         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3104         return ret;
3105 out_overflow:
3106         print_overflow_msg(__func__, xdr);
3107         return -EIO;
3108 }
3109
3110 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3111 {
3112         __be32 *p;
3113         int status = 0;
3114
3115         *res = 0;
3116         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3117                 return -EIO;
3118         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3119                 p = xdr_inline_decode(xdr, 8);
3120                 if (unlikely(!p))
3121                         goto out_overflow;
3122                 xdr_decode_hyper(p, res);
3123                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3124         }
3125         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3126         return status;
3127 out_overflow:
3128         print_overflow_msg(__func__, xdr);
3129         return -EIO;
3130 }
3131
3132 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3133 {
3134         __be32 *p;
3135         int status = 0;
3136
3137         *res = 0;
3138         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3139                 return -EIO;
3140         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3141                 p = xdr_inline_decode(xdr, 8);
3142                 if (unlikely(!p))
3143                         goto out_overflow;
3144                 xdr_decode_hyper(p, res);
3145                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3146         }
3147         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3148         return status;
3149 out_overflow:
3150         print_overflow_msg(__func__, xdr);
3151         return -EIO;
3152 }
3153
3154 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3155 {
3156         __be32 *p;
3157         int status = 0;
3158
3159         *res = 0;
3160         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3161                 return -EIO;
3162         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3163                 p = xdr_inline_decode(xdr, 8);
3164                 if (unlikely(!p))
3165                         goto out_overflow;
3166                 xdr_decode_hyper(p, res);
3167                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3168         }
3169         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3170         return status;
3171 out_overflow:
3172         print_overflow_msg(__func__, xdr);
3173         return -EIO;
3174 }
3175
3176 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3177 {
3178         u32 n;
3179         __be32 *p;
3180         int status = 0;
3181
3182         p = xdr_inline_decode(xdr, 4);
3183         if (unlikely(!p))
3184                 goto out_overflow;
3185         n = be32_to_cpup(p);
3186         if (n == 0)
3187                 goto root_path;
3188         dprintk("path ");
3189         path->ncomponents = 0;
3190         while (path->ncomponents < n) {
3191                 struct nfs4_string *component = &path->components[path->ncomponents];
3192                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3193                 if (unlikely(status != 0))
3194                         goto out_eio;
3195                 if (path->ncomponents != n)
3196                         dprintk("/");
3197                 dprintk("%s", component->data);
3198                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3199                         path->ncomponents++;
3200                 else {
3201                         dprintk("cannot parse %d components in path\n", n);
3202                         goto out_eio;
3203                 }
3204         }
3205 out:
3206         dprintk("\n");
3207         return status;
3208 root_path:
3209 /* a root pathname is sent as a zero component4 */
3210         path->ncomponents = 1;
3211         path->components[0].len=0;
3212         path->components[0].data=NULL;
3213         dprintk("path /\n");
3214         goto out;
3215 out_eio:
3216         dprintk(" status %d", status);
3217         status = -EIO;
3218         goto out;
3219 out_overflow:
3220         print_overflow_msg(__func__, xdr);
3221         return -EIO;
3222 }
3223
3224 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3225 {
3226         int n;
3227         __be32 *p;
3228         int status = -EIO;
3229
3230         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3231                 goto out;
3232         status = 0;
3233         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3234                 goto out;
3235         dprintk("%s: fsroot ", __func__);
3236         status = decode_pathname(xdr, &res->fs_path);
3237         if (unlikely(status != 0))
3238                 goto out;
3239         p = xdr_inline_decode(xdr, 4);
3240         if (unlikely(!p))
3241                 goto out_overflow;
3242         n = be32_to_cpup(p);
3243         if (n <= 0)
3244                 goto out_eio;
3245         res->nlocations = 0;
3246         while (res->nlocations < n) {
3247                 u32 m;
3248                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3249
3250                 p = xdr_inline_decode(xdr, 4);
3251                 if (unlikely(!p))
3252                         goto out_overflow;
3253                 m = be32_to_cpup(p);
3254
3255                 loc->nservers = 0;
3256                 dprintk("%s: servers ", __func__);
3257                 while (loc->nservers < m) {
3258                         struct nfs4_string *server = &loc->servers[loc->nservers];
3259                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3260                         if (unlikely(status != 0))
3261                                 goto out_eio;
3262                         dprintk("%s ", server->data);
3263                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3264                                 loc->nservers++;
3265                         else {
3266                                 unsigned int i;
3267                                 dprintk("%s: using first %u of %u servers "
3268                                         "returned for location %u\n",
3269                                                 __func__,
3270                                                 NFS4_FS_LOCATION_MAXSERVERS,
3271                                                 m, res->nlocations);
3272                                 for (i = loc->nservers; i < m; i++) {
3273                                         unsigned int len;
3274                                         char *data;
3275                                         status = decode_opaque_inline(xdr, &len, &data);
3276                                         if (unlikely(status != 0))
3277                                                 goto out_eio;
3278                                 }
3279                         }
3280                 }
3281                 status = decode_pathname(xdr, &loc->rootpath);
3282                 if (unlikely(status != 0))
3283                         goto out_eio;
3284                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3285                         res->nlocations++;
3286         }
3287         if (res->nlocations != 0)
3288                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3289 out:
3290         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3291         return status;
3292 out_overflow:
3293         print_overflow_msg(__func__, xdr);
3294 out_eio:
3295         status = -EIO;
3296         goto out;
3297 }
3298
3299 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3300 {
3301         __be32 *p;
3302         int status = 0;
3303
3304         *res = 0;
3305         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3306                 return -EIO;
3307         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3308                 p = xdr_inline_decode(xdr, 8);
3309                 if (unlikely(!p))
3310                         goto out_overflow;
3311                 xdr_decode_hyper(p, res);
3312                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3313         }
3314         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3315         return status;
3316 out_overflow:
3317         print_overflow_msg(__func__, xdr);
3318         return -EIO;
3319 }
3320
3321 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3322 {
3323         __be32 *p;
3324         int status = 0;
3325
3326         *maxlink = 1;
3327         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3328                 return -EIO;
3329         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3330                 p = xdr_inline_decode(xdr, 4);
3331                 if (unlikely(!p))
3332                         goto out_overflow;
3333                 *maxlink = be32_to_cpup(p);
3334                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3335         }
3336         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3337         return status;
3338 out_overflow:
3339         print_overflow_msg(__func__, xdr);
3340         return -EIO;
3341 }
3342
3343 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3344 {
3345         __be32 *p;
3346         int status = 0;
3347
3348         *maxname = 1024;
3349         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3350                 return -EIO;
3351         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3352                 p = xdr_inline_decode(xdr, 4);
3353                 if (unlikely(!p))
3354                         goto out_overflow;
3355                 *maxname = be32_to_cpup(p);
3356                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3357         }
3358         dprintk("%s: maxname=%u\n", __func__, *maxname);
3359         return status;
3360 out_overflow:
3361         print_overflow_msg(__func__, xdr);
3362         return -EIO;
3363 }
3364
3365 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3366 {
3367         __be32 *p;
3368         int status = 0;
3369
3370         *res = 1024;
3371         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3372                 return -EIO;
3373         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3374                 uint64_t maxread;
3375                 p = xdr_inline_decode(xdr, 8);
3376                 if (unlikely(!p))
3377                         goto out_overflow;
3378                 xdr_decode_hyper(p, &maxread);
3379                 if (maxread > 0x7FFFFFFF)
3380                         maxread = 0x7FFFFFFF;
3381                 *res = (uint32_t)maxread;
3382                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3383         }
3384         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3385         return status;
3386 out_overflow:
3387         print_overflow_msg(__func__, xdr);
3388         return -EIO;
3389 }
3390
3391 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3392 {
3393         __be32 *p;
3394         int status = 0;
3395
3396         *res = 1024;
3397         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3398                 return -EIO;
3399         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3400                 uint64_t maxwrite;
3401                 p = xdr_inline_decode(xdr, 8);
3402                 if (unlikely(!p))
3403                         goto out_overflow;
3404                 xdr_decode_hyper(p, &maxwrite);
3405                 if (maxwrite > 0x7FFFFFFF)
3406                         maxwrite = 0x7FFFFFFF;
3407                 *res = (uint32_t)maxwrite;
3408                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3409         }
3410         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3411         return status;
3412 out_overflow:
3413         print_overflow_msg(__func__, xdr);
3414         return -EIO;
3415 }
3416
3417 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3418 {
3419         uint32_t tmp;
3420         __be32 *p;
3421         int ret = 0;
3422
3423         *mode = 0;
3424         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3425                 return -EIO;
3426         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3427                 p = xdr_inline_decode(xdr, 4);
3428                 if (unlikely(!p))
3429                         goto out_overflow;
3430                 tmp = be32_to_cpup(p);
3431                 *mode = tmp & ~S_IFMT;
3432                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3433                 ret = NFS_ATTR_FATTR_MODE;
3434         }
3435         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3436         return ret;
3437 out_overflow:
3438         print_overflow_msg(__func__, xdr);
3439         return -EIO;
3440 }
3441
3442 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3443 {
3444         __be32 *p;
3445         int ret = 0;
3446
3447         *nlink = 1;
3448         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3449                 return -EIO;
3450         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3451                 p = xdr_inline_decode(xdr, 4);
3452                 if (unlikely(!p))
3453                         goto out_overflow;
3454                 *nlink = be32_to_cpup(p);
3455                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3456                 ret = NFS_ATTR_FATTR_NLINK;
3457         }
3458         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3459         return ret;
3460 out_overflow:
3461         print_overflow_msg(__func__, xdr);
3462         return -EIO;
3463 }
3464
3465 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3466                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3467 {
3468         uint32_t len;
3469         __be32 *p;
3470         int ret = 0;
3471
3472         *uid = -2;
3473         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3474                 return -EIO;
3475         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3476                 p = xdr_inline_decode(xdr, 4);
3477                 if (unlikely(!p))
3478                         goto out_overflow;
3479                 len = be32_to_cpup(p);
3480                 p = xdr_inline_decode(xdr, len);
3481                 if (unlikely(!p))
3482                         goto out_overflow;
3483                 if (!may_sleep) {
3484                         /* do nothing */
3485                 } else if (len < XDR_MAX_NETOBJ) {
3486                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3487                                 ret = NFS_ATTR_FATTR_OWNER;
3488                         else
3489                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3490                                                 __func__);
3491                 } else
3492                         dprintk("%s: name too long (%u)!\n",
3493                                         __func__, len);
3494                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3495         }
3496         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3497         return ret;
3498 out_overflow:
3499         print_overflow_msg(__func__, xdr);
3500         return -EIO;
3501 }
3502
3503 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3504                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3505 {
3506         uint32_t len;
3507         __be32 *p;
3508         int ret = 0;
3509
3510         *gid = -2;
3511         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3512                 return -EIO;
3513         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3514                 p = xdr_inline_decode(xdr, 4);
3515                 if (unlikely(!p))
3516                         goto out_overflow;
3517                 len = be32_to_cpup(p);
3518                 p = xdr_inline_decode(xdr, len);
3519                 if (unlikely(!p))
3520                         goto out_overflow;
3521                 if (!may_sleep) {
3522                         /* do nothing */
3523                 } else if (len < XDR_MAX_NETOBJ) {
3524                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3525                                 ret = NFS_ATTR_FATTR_GROUP;
3526                         else
3527                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3528                                                 __func__);
3529                 } else
3530                         dprintk("%s: name too long (%u)!\n",
3531                                         __func__, len);
3532                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3533         }
3534         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3535         return ret;
3536 out_overflow:
3537         print_overflow_msg(__func__, xdr);
3538         return -EIO;
3539 }
3540
3541 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3542 {
3543         uint32_t major = 0, minor = 0;
3544         __be32 *p;
3545         int ret = 0;
3546
3547         *rdev = MKDEV(0,0);
3548         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3549                 return -EIO;
3550         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3551                 dev_t tmp;
3552
3553                 p = xdr_inline_decode(xdr, 8);
3554                 if (unlikely(!p))
3555                         goto out_overflow;
3556                 major = be32_to_cpup(p++);
3557                 minor = be32_to_cpup(p);
3558                 tmp = MKDEV(major, minor);
3559                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3560                         *rdev = tmp;
3561                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3562                 ret = NFS_ATTR_FATTR_RDEV;
3563         }
3564         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3565         return ret;
3566 out_overflow:
3567         print_overflow_msg(__func__, xdr);
3568         return -EIO;
3569 }
3570
3571 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3572 {
3573         __be32 *p;
3574         int status = 0;
3575
3576         *res = 0;
3577         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3578                 return -EIO;
3579         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3580                 p = xdr_inline_decode(xdr, 8);
3581                 if (unlikely(!p))
3582                         goto out_overflow;
3583                 xdr_decode_hyper(p, res);
3584                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3585         }
3586         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3587         return status;
3588 out_overflow:
3589         print_overflow_msg(__func__, xdr);
3590         return -EIO;
3591 }
3592
3593 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3594 {
3595         __be32 *p;
3596         int status = 0;
3597
3598         *res = 0;
3599         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3600                 return -EIO;
3601         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3602                 p = xdr_inline_decode(xdr, 8);
3603                 if (unlikely(!p))
3604                         goto out_overflow;
3605                 xdr_decode_hyper(p, res);
3606                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3607         }
3608         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3609         return status;
3610 out_overflow:
3611         print_overflow_msg(__func__, xdr);
3612         return -EIO;
3613 }
3614
3615 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3616 {
3617         __be32 *p;
3618         int status = 0;
3619
3620         *res = 0;
3621         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3622                 return -EIO;
3623         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3624                 p = xdr_inline_decode(xdr, 8);
3625                 if (unlikely(!p))
3626                         goto out_overflow;
3627                 xdr_decode_hyper(p, res);
3628                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3629         }
3630         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3631         return status;
3632 out_overflow:
3633         print_overflow_msg(__func__, xdr);
3634         return -EIO;
3635 }
3636
3637 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3638 {
3639         __be32 *p;
3640         int ret = 0;
3641
3642         *used = 0;
3643         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3646                 p = xdr_inline_decode(xdr, 8);
3647                 if (unlikely(!p))
3648                         goto out_overflow;
3649                 xdr_decode_hyper(p, used);
3650                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3651                 ret = NFS_ATTR_FATTR_SPACE_USED;
3652         }
3653         dprintk("%s: space used=%Lu\n", __func__,
3654                         (unsigned long long)*used);
3655         return ret;
3656 out_overflow:
3657         print_overflow_msg(__func__, xdr);
3658         return -EIO;
3659 }
3660
3661 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3662 {
3663         __be32 *p;
3664         uint64_t sec;
3665         uint32_t nsec;
3666
3667         p = xdr_inline_decode(xdr, 12);
3668         if (unlikely(!p))
3669                 goto out_overflow;
3670         p = xdr_decode_hyper(p, &sec);
3671         nsec = be32_to_cpup(p);
3672         time->tv_sec = (time_t)sec;
3673         time->tv_nsec = (long)nsec;
3674         return 0;
3675 out_overflow:
3676         print_overflow_msg(__func__, xdr);
3677         return -EIO;
3678 }
3679
3680 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3681 {
3682         int status = 0;
3683
3684         time->tv_sec = 0;
3685         time->tv_nsec = 0;
3686         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3687                 return -EIO;
3688         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3689                 status = decode_attr_time(xdr, time);
3690                 if (status == 0)
3691                         status = NFS_ATTR_FATTR_ATIME;
3692                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3693         }
3694         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3695         return status;
3696 }
3697
3698 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3699 {
3700         int status = 0;
3701
3702         time->tv_sec = 0;
3703         time->tv_nsec = 0;
3704         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3705                 return -EIO;
3706         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3707                 status = decode_attr_time(xdr, time);
3708                 if (status == 0)
3709                         status = NFS_ATTR_FATTR_CTIME;
3710                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3711         }
3712         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3713         return status;
3714 }
3715
3716 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3717                                   struct timespec *time)
3718 {
3719         int status = 0;
3720
3721         time->tv_sec = 0;
3722         time->tv_nsec = 0;
3723         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3724                 return -EIO;
3725         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3726                 status = decode_attr_time(xdr, time);
3727                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3728         }
3729         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3730                 (long)time->tv_nsec);
3731         return status;
3732 }
3733
3734 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3735 {
3736         int status = 0;
3737
3738         time->tv_sec = 0;
3739         time->tv_nsec = 0;
3740         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3741                 return -EIO;
3742         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3743                 status = decode_attr_time(xdr, time);
3744                 if (status == 0)
3745                         status = NFS_ATTR_FATTR_MTIME;
3746                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3747         }
3748         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3749         return status;
3750 }
3751
3752 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3753 {
3754         unsigned int attrwords = XDR_QUADLEN(attrlen);
3755         unsigned int nwords = xdr->p - savep;
3756
3757         if (unlikely(attrwords != nwords)) {
3758                 dprintk("%s: server returned incorrect attribute length: "
3759                         "%u %c %u\n",
3760                                 __func__,
3761                                 attrwords << 2,
3762                                 (attrwords < nwords) ? '<' : '>',
3763                                 nwords << 2);
3764                 return -EIO;
3765         }
3766         return 0;
3767 }
3768
3769 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3770 {
3771         __be32 *p;
3772
3773         p = xdr_inline_decode(xdr, 20);
3774         if (unlikely(!p))
3775                 goto out_overflow;
3776         cinfo->atomic = be32_to_cpup(p++);
3777         p = xdr_decode_hyper(p, &cinfo->before);
3778         xdr_decode_hyper(p, &cinfo->after);
3779         return 0;
3780 out_overflow:
3781         print_overflow_msg(__func__, xdr);
3782         return -EIO;
3783 }
3784
3785 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3786 {
3787         __be32 *p;
3788         uint32_t supp, acc;
3789         int status;
3790
3791         status = decode_op_hdr(xdr, OP_ACCESS);
3792         if (status)
3793                 return status;
3794         p = xdr_inline_decode(xdr, 8);
3795         if (unlikely(!p))
3796                 goto out_overflow;
3797         supp = be32_to_cpup(p++);
3798         acc = be32_to_cpup(p);
3799         access->supported = supp;
3800         access->access = acc;
3801         return 0;
3802 out_overflow:
3803         print_overflow_msg(__func__, xdr);
3804         return -EIO;
3805 }
3806
3807 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3808 {
3809         __be32 *p;
3810
3811         p = xdr_inline_decode(xdr, len);
3812         if (likely(p)) {
3813                 memcpy(buf, p, len);
3814                 return 0;
3815         }
3816         print_overflow_msg(__func__, xdr);
3817         return -EIO;
3818 }
3819
3820 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3821 {
3822         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3823 }
3824
3825 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3826 {
3827         int status;
3828
3829         status = decode_op_hdr(xdr, OP_CLOSE);
3830         if (status != -EIO)
3831                 nfs_increment_open_seqid(status, res->seqid);
3832         if (!status)
3833                 status = decode_stateid(xdr, &res->stateid);
3834         return status;
3835 }
3836
3837 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3838 {
3839         return decode_opaque_fixed(xdr, verifier, 8);
3840 }
3841
3842 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3843 {
3844         int status;
3845
3846         status = decode_op_hdr(xdr, OP_COMMIT);
3847         if (!status)
3848                 status = decode_verifier(xdr, res->verf->verifier);
3849         return status;
3850 }
3851
3852 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3853 {
3854         __be32 *p;
3855         uint32_t bmlen;
3856         int status;
3857
3858         status = decode_op_hdr(xdr, OP_CREATE);
3859         if (status)
3860                 return status;
3861         if ((status = decode_change_info(xdr, cinfo)))
3862                 return status;
3863         p = xdr_inline_decode(xdr, 4);
3864         if (unlikely(!p))
3865                 goto out_overflow;
3866         bmlen = be32_to_cpup(p);
3867         p = xdr_inline_decode(xdr, bmlen << 2);
3868         if (likely(p))
3869                 return 0;
3870 out_overflow:
3871         print_overflow_msg(__func__, xdr);
3872         return -EIO;
3873 }
3874
3875 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3876 {
3877         __be32 *savep;
3878         uint32_t attrlen, bitmap[2] = {0};
3879         int status;
3880
3881         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3882                 goto xdr_error;
3883         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3884                 goto xdr_error;
3885         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3886                 goto xdr_error;
3887         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3888                 goto xdr_error;
3889         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3890                 goto xdr_error;
3891         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3892                 goto xdr_error;
3893         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3894                 goto xdr_error;
3895         status = verify_attr_len(xdr, savep, attrlen);
3896 xdr_error:
3897         dprintk("%s: xdr returned %d!\n", __func__, -status);
3898         return status;
3899 }
3900
3901 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3902 {
3903         __be32 *savep;
3904         uint32_t attrlen, bitmap[2] = {0};
3905         int status;
3906
3907         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3908                 goto xdr_error;
3909         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3910                 goto xdr_error;
3911         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3912                 goto xdr_error;
3913
3914         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3915                 goto xdr_error;
3916         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3917                 goto xdr_error;
3918         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3919                 goto xdr_error;
3920         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3921                 goto xdr_error;
3922         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3923                 goto xdr_error;
3924         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3925                 goto xdr_error;
3926
3927         status = verify_attr_len(xdr, savep, attrlen);
3928 xdr_error:
3929         dprintk("%s: xdr returned %d!\n", __func__, -status);
3930         return status;
3931 }
3932
3933 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3934 {
3935         __be32 *savep;
3936         uint32_t attrlen, bitmap[2] = {0};
3937         int status;
3938
3939         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3940                 goto xdr_error;
3941         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3942                 goto xdr_error;
3943         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3944                 goto xdr_error;
3945
3946         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3947                 goto xdr_error;
3948         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3949                 goto xdr_error;
3950
3951         status = verify_attr_len(xdr, savep, attrlen);
3952 xdr_error:
3953         dprintk("%s: xdr returned %d!\n", __func__, -status);
3954         return status;
3955 }
3956
3957 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3958                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3959                 const struct nfs_server *server, int may_sleep)
3960 {
3961         int status;
3962         umode_t fmode = 0;
3963         uint64_t fileid;
3964         uint32_t type;
3965
3966         status = decode_attr_type(xdr, bitmap, &type);
3967         if (status < 0)
3968                 goto xdr_error;
3969         fattr->mode = 0;
3970         if (status != 0) {
3971                 fattr->mode |= nfs_type2fmt[type];
3972                 fattr->valid |= status;
3973         }
3974
3975         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3976         if (status < 0)
3977                 goto xdr_error;
3978         fattr->valid |= status;
3979
3980         status = decode_attr_size(xdr, bitmap, &fattr->size);
3981         if (status < 0)
3982                 goto xdr_error;
3983         fattr->valid |= status;
3984
3985         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3986         if (status < 0)
3987                 goto xdr_error;
3988         fattr->valid |= status;
3989
3990         status = decode_attr_error(xdr, bitmap);
3991         if (status < 0)
3992                 goto xdr_error;
3993
3994         status = decode_attr_filehandle(xdr, bitmap, fh);
3995         if (status < 0)
3996                 goto xdr_error;
3997
3998         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3999         if (status < 0)
4000                 goto xdr_error;
4001         fattr->valid |= status;
4002
4003         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4004                                                 struct nfs4_fs_locations,
4005                                                 fattr));
4006         if (status < 0)
4007                 goto xdr_error;
4008         fattr->valid |= status;
4009
4010         status = decode_attr_mode(xdr, bitmap, &fmode);
4011         if (status < 0)
4012                 goto xdr_error;
4013         if (status != 0) {
4014                 fattr->mode |= fmode;
4015                 fattr->valid |= status;
4016         }
4017
4018         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4019         if (status < 0)
4020                 goto xdr_error;
4021         fattr->valid |= status;
4022
4023         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4024         if (status < 0)
4025                 goto xdr_error;
4026         fattr->valid |= status;
4027
4028         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4029         if (status < 0)
4030                 goto xdr_error;
4031         fattr->valid |= status;
4032
4033         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4034         if (status < 0)
4035                 goto xdr_error;
4036         fattr->valid |= status;
4037
4038         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4039         if (status < 0)
4040                 goto xdr_error;
4041         fattr->valid |= status;
4042
4043         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4044         if (status < 0)
4045                 goto xdr_error;
4046         fattr->valid |= status;
4047
4048         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4049         if (status < 0)
4050                 goto xdr_error;
4051         fattr->valid |= status;
4052
4053         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4054         if (status < 0)
4055                 goto xdr_error;
4056         fattr->valid |= status;
4057
4058         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
4059         if (status < 0)
4060                 goto xdr_error;
4061         if (status != 0 && !(fattr->valid & status)) {
4062                 fattr->fileid = fileid;
4063                 fattr->valid |= status;
4064         }
4065
4066 xdr_error:
4067         dprintk("%s: xdr returned %d\n", __func__, -status);
4068         return status;
4069 }
4070
4071 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4072                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4073 {
4074         __be32 *savep;
4075         uint32_t attrlen,
4076                  bitmap[2] = {0};
4077         int status;
4078
4079         status = decode_op_hdr(xdr, OP_GETATTR);
4080         if (status < 0)
4081                 goto xdr_error;
4082
4083         status = decode_attr_bitmap(xdr, bitmap);
4084         if (status < 0)
4085                 goto xdr_error;
4086
4087         status = decode_attr_length(xdr, &attrlen, &savep);
4088         if (status < 0)
4089                 goto xdr_error;
4090
4091         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4092         if (status < 0)
4093                 goto xdr_error;
4094
4095         status = verify_attr_len(xdr, savep, attrlen);
4096 xdr_error:
4097         dprintk("%s: xdr returned %d\n", __func__, -status);
4098         return status;
4099 }
4100
4101 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4102                 const struct nfs_server *server, int may_sleep)
4103 {
4104         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4105 }
4106
4107 /*
4108  * Decode potentially multiple layout types. Currently we only support
4109  * one layout driver per file system.
4110  */
4111 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4112                                          uint32_t *layouttype)
4113 {
4114         uint32_t *p;
4115         int num;
4116
4117         p = xdr_inline_decode(xdr, 4);
4118         if (unlikely(!p))
4119                 goto out_overflow;
4120         num = be32_to_cpup(p);
4121
4122         /* pNFS is not supported by the underlying file system */
4123         if (num == 0) {
4124                 *layouttype = 0;
4125                 return 0;
4126         }
4127         if (num > 1)
4128                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4129                         "per filesystem not supported\n", __func__);
4130
4131         /* Decode and set first layout type, move xdr->p past unused types */
4132         p = xdr_inline_decode(xdr, num * 4);
4133         if (unlikely(!p))
4134                 goto out_overflow;
4135         *layouttype = be32_to_cpup(p);
4136         return 0;
4137 out_overflow:
4138         print_overflow_msg(__func__, xdr);
4139         return -EIO;
4140 }
4141
4142 /*
4143  * The type of file system exported.
4144  * Note we must ensure that layouttype is set in any non-error case.
4145  */
4146 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4147                                 uint32_t *layouttype)
4148 {
4149         int status = 0;
4150
4151         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4152         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4153                 return -EIO;
4154         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4155                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4156                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4157         } else
4158                 *layouttype = 0;
4159         return status;
4160 }
4161
4162 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4163 {
4164         __be32 *savep;
4165         uint32_t attrlen, bitmap[2];
4166         int status;
4167
4168         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4169                 goto xdr_error;
4170         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4171                 goto xdr_error;
4172         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4173                 goto xdr_error;
4174
4175         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4176
4177         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4178                 goto xdr_error;
4179         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4180                 goto xdr_error;
4181         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4182                 goto xdr_error;
4183         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4184         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4185                 goto xdr_error;
4186         fsinfo->wtpref = fsinfo->wtmax;
4187         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4188         if (status != 0)
4189                 goto xdr_error;
4190         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4191         if (status != 0)
4192                 goto xdr_error;
4193
4194         status = verify_attr_len(xdr, savep, attrlen);
4195 xdr_error:
4196         dprintk("%s: xdr returned %d!\n", __func__, -status);
4197         return status;
4198 }
4199
4200 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4201 {
4202         __be32 *p;
4203         uint32_t len;
4204         int status;
4205
4206         /* Zero handle first to allow comparisons */
4207         memset(fh, 0, sizeof(*fh));
4208
4209         status = decode_op_hdr(xdr, OP_GETFH);
4210         if (status)
4211                 return status;
4212
4213         p = xdr_inline_decode(xdr, 4);
4214         if (unlikely(!p))
4215                 goto out_overflow;
4216         len = be32_to_cpup(p);
4217         if (len > NFS4_FHSIZE)
4218                 return -EIO;
4219         fh->size = len;
4220         p = xdr_inline_decode(xdr, len);
4221         if (unlikely(!p))
4222                 goto out_overflow;
4223         memcpy(fh->data, p, len);
4224         return 0;
4225 out_overflow:
4226         print_overflow_msg(__func__, xdr);
4227         return -EIO;
4228 }
4229
4230 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4231 {
4232         int status;
4233
4234         status = decode_op_hdr(xdr, OP_LINK);
4235         if (status)
4236                 return status;
4237         return decode_change_info(xdr, cinfo);
4238 }
4239
4240 /*
4241  * We create the owner, so we know a proper owner.id length is 4.
4242  */
4243 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4244 {
4245         uint64_t offset, length, clientid;
4246         __be32 *p;
4247         uint32_t namelen, type;
4248
4249         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4250         if (unlikely(!p))
4251                 goto out_overflow;
4252         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4253         p = xdr_decode_hyper(p, &length);
4254         type = be32_to_cpup(p++); /* 4 byte read */
4255         if (fl != NULL) { /* manipulate file lock */
4256                 fl->fl_start = (loff_t)offset;
4257                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4258                 if (length == ~(uint64_t)0)
4259                         fl->fl_end = OFFSET_MAX;
4260                 fl->fl_type = F_WRLCK;
4261                 if (type & 1)
4262                         fl->fl_type = F_RDLCK;
4263                 fl->fl_pid = 0;
4264         }
4265         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4266         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4267         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4268         if (likely(p))
4269                 return -NFS4ERR_DENIED;
4270 out_overflow:
4271         print_overflow_msg(__func__, xdr);
4272         return -EIO;
4273 }
4274
4275 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4276 {
4277         int status;
4278
4279         status = decode_op_hdr(xdr, OP_LOCK);
4280         if (status == -EIO)
4281                 goto out;
4282         if (status == 0) {
4283                 status = decode_stateid(xdr, &res->stateid);
4284                 if (unlikely(status))
4285                         goto out;
4286         } else if (status == -NFS4ERR_DENIED)
4287                 status = decode_lock_denied(xdr, NULL);
4288         if (res->open_seqid != NULL)
4289                 nfs_increment_open_seqid(status, res->open_seqid);
4290         nfs_increment_lock_seqid(status, res->lock_seqid);
4291 out:
4292         return status;
4293 }
4294
4295 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4296 {
4297         int status;
4298         status = decode_op_hdr(xdr, OP_LOCKT);
4299         if (status == -NFS4ERR_DENIED)
4300                 return decode_lock_denied(xdr, res->denied);
4301         return status;
4302 }
4303
4304 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4305 {
4306         int status;
4307
4308         status = decode_op_hdr(xdr, OP_LOCKU);
4309         if (status != -EIO)
4310                 nfs_increment_lock_seqid(status, res->seqid);
4311         if (status == 0)
4312                 status = decode_stateid(xdr, &res->stateid);
4313         return status;
4314 }
4315
4316 static int decode_release_lockowner(struct xdr_stream *xdr)
4317 {
4318         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4319 }
4320
4321 static int decode_lookup(struct xdr_stream *xdr)
4322 {
4323         return decode_op_hdr(xdr, OP_LOOKUP);
4324 }
4325
4326 /* This is too sick! */
4327 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4328 {
4329         __be32 *p;
4330         uint32_t limit_type, nblocks, blocksize;
4331
4332         p = xdr_inline_decode(xdr, 12);
4333         if (unlikely(!p))
4334                 goto out_overflow;
4335         limit_type = be32_to_cpup(p++);
4336         switch (limit_type) {
4337         case 1:
4338                 xdr_decode_hyper(p, maxsize);
4339                 break;
4340         case 2:
4341                 nblocks = be32_to_cpup(p++);
4342                 blocksize = be32_to_cpup(p);
4343                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4344         }
4345         return 0;
4346 out_overflow:
4347         print_overflow_msg(__func__, xdr);
4348         return -EIO;
4349 }
4350
4351 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4352 {
4353         __be32 *p;
4354         uint32_t delegation_type;
4355         int status;
4356
4357         p = xdr_inline_decode(xdr, 4);
4358         if (unlikely(!p))
4359                 goto out_overflow;
4360         delegation_type = be32_to_cpup(p);
4361         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4362                 res->delegation_type = 0;
4363                 return 0;
4364         }
4365         status = decode_stateid(xdr, &res->delegation);
4366         if (unlikely(status))
4367                 return status;
4368         p = xdr_inline_decode(xdr, 4);
4369         if (unlikely(!p))
4370                 goto out_overflow;
4371         res->do_recall = be32_to_cpup(p);
4372
4373         switch (delegation_type) {
4374         case NFS4_OPEN_DELEGATE_READ:
4375                 res->delegation_type = FMODE_READ;
4376                 break;
4377         case NFS4_OPEN_DELEGATE_WRITE:
4378                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4379                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4380                                 return -EIO;
4381         }
4382         return decode_ace(xdr, NULL, res->server->nfs_client);
4383 out_overflow:
4384         print_overflow_msg(__func__, xdr);
4385         return -EIO;
4386 }
4387
4388 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4389 {
4390         __be32 *p;
4391         uint32_t savewords, bmlen, i;
4392         int status;
4393
4394         status = decode_op_hdr(xdr, OP_OPEN);
4395         if (status != -EIO)
4396                 nfs_increment_open_seqid(status, res->seqid);
4397         if (!status)
4398                 status = decode_stateid(xdr, &res->stateid);
4399         if (unlikely(status))
4400                 return status;
4401
4402         decode_change_info(xdr, &res->cinfo);
4403
4404         p = xdr_inline_decode(xdr, 8);
4405         if (unlikely(!p))
4406                 goto out_overflow;
4407         res->rflags = be32_to_cpup(p++);
4408         bmlen = be32_to_cpup(p);
4409         if (bmlen > 10)
4410                 goto xdr_error;
4411
4412         p = xdr_inline_decode(xdr, bmlen << 2);
4413         if (unlikely(!p))
4414                 goto out_overflow;
4415         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4416         for (i = 0; i < savewords; ++i)
4417                 res->attrset[i] = be32_to_cpup(p++);
4418         for (; i < NFS4_BITMAP_SIZE; i++)
4419                 res->attrset[i] = 0;
4420
4421         return decode_delegation(xdr, res);
4422 xdr_error:
4423         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4424         return -EIO;
4425 out_overflow:
4426         print_overflow_msg(__func__, xdr);
4427         return -EIO;
4428 }
4429
4430 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4431 {
4432         int status;
4433
4434         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4435         if (status != -EIO)
4436                 nfs_increment_open_seqid(status, res->seqid);
4437         if (!status)
4438                 status = decode_stateid(xdr, &res->stateid);
4439         return status;
4440 }
4441
4442 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4443 {
4444         int status;
4445
4446         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4447         if (status != -EIO)
4448                 nfs_increment_open_seqid(status, res->seqid);
4449         if (!status)
4450                 status = decode_stateid(xdr, &res->stateid);
4451         return status;
4452 }
4453
4454 static int decode_putfh(struct xdr_stream *xdr)
4455 {
4456         return decode_op_hdr(xdr, OP_PUTFH);
4457 }
4458
4459 static int decode_putrootfh(struct xdr_stream *xdr)
4460 {
4461         return decode_op_hdr(xdr, OP_PUTROOTFH);
4462 }
4463
4464 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4465 {
4466         struct kvec *iov = req->rq_rcv_buf.head;
4467         __be32 *p;
4468         uint32_t count, eof, recvd, hdrlen;
4469         int status;
4470
4471         status = decode_op_hdr(xdr, OP_READ);
4472         if (status)
4473                 return status;
4474         p = xdr_inline_decode(xdr, 8);
4475         if (unlikely(!p))
4476                 goto out_overflow;
4477         eof = be32_to_cpup(p++);
4478         count = be32_to_cpup(p);
4479         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4480         recvd = req->rq_rcv_buf.len - hdrlen;
4481         if (count > recvd) {
4482                 dprintk("NFS: server cheating in read reply: "
4483                                 "count %u > recvd %u\n", count, recvd);
4484                 count = recvd;
4485                 eof = 0;
4486         }
4487         xdr_read_pages(xdr, count);
4488         res->eof = eof;
4489         res->count = count;
4490         return 0;
4491 out_overflow:
4492         print_overflow_msg(__func__, xdr);
4493         return -EIO;
4494 }
4495
4496 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4497 {
4498         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4499         struct kvec     *iov = rcvbuf->head;
4500         size_t          hdrlen;
4501         u32             recvd, pglen = rcvbuf->page_len;
4502         int             status;
4503
4504         status = decode_op_hdr(xdr, OP_READDIR);
4505         if (!status)
4506                 status = decode_verifier(xdr, readdir->verifier.data);
4507         if (unlikely(status))
4508                 return status;
4509         dprintk("%s: verifier = %08x:%08x\n",
4510                         __func__,
4511                         ((u32 *)readdir->verifier.data)[0],
4512                         ((u32 *)readdir->verifier.data)[1]);
4513
4514
4515         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4516         recvd = rcvbuf->len - hdrlen;
4517         if (pglen > recvd)
4518                 pglen = recvd;
4519         xdr_read_pages(xdr, pglen);
4520
4521
4522         return pglen;
4523 }
4524
4525 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4526 {
4527         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4528         struct kvec *iov = rcvbuf->head;
4529         size_t hdrlen;
4530         u32 len, recvd;
4531         __be32 *p;
4532         int status;
4533
4534         status = decode_op_hdr(xdr, OP_READLINK);
4535         if (status)
4536                 return status;
4537
4538         /* Convert length of symlink */
4539         p = xdr_inline_decode(xdr, 4);
4540         if (unlikely(!p))
4541                 goto out_overflow;
4542         len = be32_to_cpup(p);
4543         if (len >= rcvbuf->page_len || len <= 0) {
4544                 dprintk("nfs: server returned giant symlink!\n");
4545                 return -ENAMETOOLONG;
4546         }
4547         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4548         recvd = req->rq_rcv_buf.len - hdrlen;
4549         if (recvd < len) {
4550                 dprintk("NFS: server cheating in readlink reply: "
4551                                 "count %u > recvd %u\n", len, recvd);
4552                 return -EIO;
4553         }
4554         xdr_read_pages(xdr, len);
4555         /*
4556          * The XDR encode routine has set things up so that
4557          * the link text will be copied directly into the
4558          * buffer.  We just have to do overflow-checking,
4559          * and and null-terminate the text (the VFS expects
4560          * null-termination).
4561          */
4562         xdr_terminate_string(rcvbuf, len);
4563         return 0;
4564 out_overflow:
4565         print_overflow_msg(__func__, xdr);
4566         return -EIO;
4567 }
4568
4569 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4570 {
4571         int status;
4572
4573         status = decode_op_hdr(xdr, OP_REMOVE);
4574         if (status)
4575                 goto out;
4576         status = decode_change_info(xdr, cinfo);
4577 out:
4578         return status;
4579 }
4580
4581 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4582               struct nfs4_change_info *new_cinfo)
4583 {
4584         int status;
4585
4586         status = decode_op_hdr(xdr, OP_RENAME);
4587         if (status)
4588                 goto out;
4589         if ((status = decode_change_info(xdr, old_cinfo)))
4590                 goto out;
4591         status = decode_change_info(xdr, new_cinfo);
4592 out:
4593         return status;
4594 }
4595
4596 static int decode_renew(struct xdr_stream *xdr)
4597 {
4598         return decode_op_hdr(xdr, OP_RENEW);
4599 }
4600
4601 static int
4602 decode_restorefh(struct xdr_stream *xdr)
4603 {
4604         return decode_op_hdr(xdr, OP_RESTOREFH);
4605 }
4606
4607 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4608                 size_t *acl_len)
4609 {
4610         __be32 *savep;
4611         uint32_t attrlen,
4612                  bitmap[2] = {0};
4613         struct kvec *iov = req->rq_rcv_buf.head;
4614         int status;
4615
4616         *acl_len = 0;
4617         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4618                 goto out;
4619         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4620                 goto out;
4621         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4622                 goto out;
4623
4624         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4625                 return -EIO;
4626         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4627                 size_t hdrlen;
4628                 u32 recvd;
4629
4630                 /* We ignore &savep and don't do consistency checks on
4631                  * the attr length.  Let userspace figure it out.... */
4632                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4633                 recvd = req->rq_rcv_buf.len - hdrlen;
4634                 if (attrlen > recvd) {
4635                         dprintk("NFS: server cheating in getattr"
4636                                         " acl reply: attrlen %u > recvd %u\n",
4637                                         attrlen, recvd);
4638                         return -EINVAL;
4639                 }
4640                 xdr_read_pages(xdr, attrlen);
4641                 *acl_len = attrlen;
4642         } else
4643                 status = -EOPNOTSUPP;
4644
4645 out:
4646         return status;
4647 }
4648
4649 static int
4650 decode_savefh(struct xdr_stream *xdr)
4651 {
4652         return decode_op_hdr(xdr, OP_SAVEFH);
4653 }
4654
4655 static int decode_setattr(struct xdr_stream *xdr)
4656 {
4657         __be32 *p;
4658         uint32_t bmlen;
4659         int status;
4660
4661         status = decode_op_hdr(xdr, OP_SETATTR);
4662         if (status)
4663                 return status;
4664         p = xdr_inline_decode(xdr, 4);
4665         if (unlikely(!p))
4666                 goto out_overflow;
4667         bmlen = be32_to_cpup(p);
4668         p = xdr_inline_decode(xdr, bmlen << 2);
4669         if (likely(p))
4670                 return 0;
4671 out_overflow:
4672         print_overflow_msg(__func__, xdr);
4673         return -EIO;
4674 }
4675
4676 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4677 {
4678         __be32 *p;
4679         uint32_t opnum;
4680         int32_t nfserr;
4681
4682         p = xdr_inline_decode(xdr, 8);
4683         if (unlikely(!p))
4684                 goto out_overflow;
4685         opnum = be32_to_cpup(p++);
4686         if (opnum != OP_SETCLIENTID) {
4687                 dprintk("nfs: decode_setclientid: Server returned operation"
4688                         " %d\n", opnum);
4689                 return -EIO;
4690         }
4691         nfserr = be32_to_cpup(p);
4692         if (nfserr == NFS_OK) {
4693                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4694                 if (unlikely(!p))
4695                         goto out_overflow;
4696                 p = xdr_decode_hyper(p, &res->clientid);
4697                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4698         } else if (nfserr == NFSERR_CLID_INUSE) {
4699                 uint32_t len;
4700
4701                 /* skip netid string */
4702                 p = xdr_inline_decode(xdr, 4);
4703                 if (unlikely(!p))
4704                         goto out_overflow;
4705                 len = be32_to_cpup(p);
4706                 p = xdr_inline_decode(xdr, len);
4707                 if (unlikely(!p))
4708                         goto out_overflow;
4709
4710                 /* skip uaddr string */
4711                 p = xdr_inline_decode(xdr, 4);
4712                 if (unlikely(!p))
4713                         goto out_overflow;
4714                 len = be32_to_cpup(p);
4715                 p = xdr_inline_decode(xdr, len);
4716                 if (unlikely(!p))
4717                         goto out_overflow;
4718                 return -NFSERR_CLID_INUSE;
4719         } else
4720                 return nfs4_stat_to_errno(nfserr);
4721
4722         return 0;
4723 out_overflow:
4724         print_overflow_msg(__func__, xdr);
4725         return -EIO;
4726 }
4727
4728 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4729 {
4730         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4731 }
4732
4733 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4734 {
4735         __be32 *p;
4736         int status;
4737
4738         status = decode_op_hdr(xdr, OP_WRITE);
4739         if (status)
4740                 return status;
4741
4742         p = xdr_inline_decode(xdr, 16);
4743         if (unlikely(!p))
4744                 goto out_overflow;
4745         res->count = be32_to_cpup(p++);
4746         res->verf->committed = be32_to_cpup(p++);
4747         memcpy(res->verf->verifier, p, 8);
4748         return 0;
4749 out_overflow:
4750         print_overflow_msg(__func__, xdr);
4751         return -EIO;
4752 }
4753
4754 static int decode_delegreturn(struct xdr_stream *xdr)
4755 {
4756         return decode_op_hdr(xdr, OP_DELEGRETURN);
4757 }
4758
4759 #if defined(CONFIG_NFS_V4_1)
4760 static int decode_exchange_id(struct xdr_stream *xdr,
4761                               struct nfs41_exchange_id_res *res)
4762 {
4763         __be32 *p;
4764         uint32_t dummy;
4765         char *dummy_str;
4766         int status;
4767         struct nfs_client *clp = res->client;
4768
4769         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4770         if (status)
4771                 return status;
4772
4773         p = xdr_inline_decode(xdr, 8);
4774         if (unlikely(!p))
4775                 goto out_overflow;
4776         xdr_decode_hyper(p, &clp->cl_clientid);
4777         p = xdr_inline_decode(xdr, 12);
4778         if (unlikely(!p))
4779                 goto out_overflow;
4780         clp->cl_seqid = be32_to_cpup(p++);
4781         clp->cl_exchange_flags = be32_to_cpup(p++);
4782
4783         /* We ask for SP4_NONE */
4784         dummy = be32_to_cpup(p);
4785         if (dummy != SP4_NONE)
4786                 return -EIO;
4787
4788         /* Throw away minor_id */
4789         p = xdr_inline_decode(xdr, 8);
4790         if (unlikely(!p))
4791                 goto out_overflow;
4792
4793         /* Throw away Major id */
4794         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4795         if (unlikely(status))
4796                 return status;
4797
4798         /* Throw away server_scope */
4799         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4800         if (unlikely(status))
4801                 return status;
4802
4803         /* Throw away Implementation id array */
4804         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4805         if (unlikely(status))
4806                 return status;
4807
4808         return 0;
4809 out_overflow:
4810         print_overflow_msg(__func__, xdr);
4811         return -EIO;
4812 }
4813
4814 static int decode_chan_attrs(struct xdr_stream *xdr,
4815                              struct nfs4_channel_attrs *attrs)
4816 {
4817         __be32 *p;
4818         u32 nr_attrs;
4819
4820         p = xdr_inline_decode(xdr, 28);
4821         if (unlikely(!p))
4822                 goto out_overflow;
4823         attrs->headerpadsz = be32_to_cpup(p++);
4824         attrs->max_rqst_sz = be32_to_cpup(p++);
4825         attrs->max_resp_sz = be32_to_cpup(p++);
4826         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4827         attrs->max_ops = be32_to_cpup(p++);
4828         attrs->max_reqs = be32_to_cpup(p++);
4829         nr_attrs = be32_to_cpup(p);
4830         if (unlikely(nr_attrs > 1)) {
4831                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4832                         __func__, nr_attrs);
4833                 return -EINVAL;
4834         }
4835         if (nr_attrs == 1) {
4836                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4837                 if (unlikely(!p))
4838                         goto out_overflow;
4839         }
4840         return 0;
4841 out_overflow:
4842         print_overflow_msg(__func__, xdr);
4843         return -EIO;
4844 }
4845
4846 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4847 {
4848         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4849 }
4850
4851 static int decode_create_session(struct xdr_stream *xdr,
4852                                  struct nfs41_create_session_res *res)
4853 {
4854         __be32 *p;
4855         int status;
4856         struct nfs_client *clp = res->client;
4857         struct nfs4_session *session = clp->cl_session;
4858
4859         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4860         if (!status)
4861                 status = decode_sessionid(xdr, &session->sess_id);
4862         if (unlikely(status))
4863                 return status;
4864
4865         /* seqid, flags */
4866         p = xdr_inline_decode(xdr, 8);
4867         if (unlikely(!p))
4868                 goto out_overflow;
4869         clp->cl_seqid = be32_to_cpup(p++);
4870         session->flags = be32_to_cpup(p);
4871
4872         /* Channel attributes */
4873         status = decode_chan_attrs(xdr, &session->fc_attrs);
4874         if (!status)
4875                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4876         return status;
4877 out_overflow:
4878         print_overflow_msg(__func__, xdr);
4879         return -EIO;
4880 }
4881
4882 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4883 {
4884         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4885 }
4886
4887 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4888 {
4889         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4890 }
4891 #endif /* CONFIG_NFS_V4_1 */
4892
4893 static int decode_sequence(struct xdr_stream *xdr,
4894                            struct nfs4_sequence_res *res,
4895                            struct rpc_rqst *rqstp)
4896 {
4897 #if defined(CONFIG_NFS_V4_1)
4898         struct nfs4_sessionid id;
4899         u32 dummy;
4900         int status;
4901         __be32 *p;
4902
4903         if (!res->sr_session)
4904                 return 0;
4905
4906         status = decode_op_hdr(xdr, OP_SEQUENCE);
4907         if (!status)
4908                 status = decode_sessionid(xdr, &id);
4909         if (unlikely(status))
4910                 goto out_err;
4911
4912         /*
4913          * If the server returns different values for sessionID, slotID or
4914          * sequence number, the server is looney tunes.
4915          */
4916         status = -EREMOTEIO;
4917
4918         if (memcmp(id.data, res->sr_session->sess_id.data,
4919                    NFS4_MAX_SESSIONID_LEN)) {
4920                 dprintk("%s Invalid session id\n", __func__);
4921                 goto out_err;
4922         }
4923
4924         p = xdr_inline_decode(xdr, 20);
4925         if (unlikely(!p))
4926                 goto out_overflow;
4927
4928         /* seqid */
4929         dummy = be32_to_cpup(p++);
4930         if (dummy != res->sr_slot->seq_nr) {
4931                 dprintk("%s Invalid sequence number\n", __func__);
4932                 goto out_err;
4933         }
4934         /* slot id */
4935         dummy = be32_to_cpup(p++);
4936         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4937                 dprintk("%s Invalid slot id\n", __func__);
4938                 goto out_err;
4939         }
4940         /* highest slot id - currently not processed */
4941         dummy = be32_to_cpup(p++);
4942         /* target highest slot id - currently not processed */
4943         dummy = be32_to_cpup(p++);
4944         /* result flags */
4945         res->sr_status_flags = be32_to_cpup(p);
4946         status = 0;
4947 out_err:
4948         res->sr_status = status;
4949         return status;
4950 out_overflow:
4951         print_overflow_msg(__func__, xdr);
4952         status = -EIO;
4953         goto out_err;
4954 #else  /* CONFIG_NFS_V4_1 */
4955         return 0;
4956 #endif /* CONFIG_NFS_V4_1 */
4957 }
4958
4959 #if defined(CONFIG_NFS_V4_1)
4960
4961 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4962                                 struct pnfs_device *pdev)
4963 {
4964         __be32 *p;
4965         uint32_t len, type;
4966         int status;
4967
4968         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4969         if (status) {
4970                 if (status == -ETOOSMALL) {
4971                         p = xdr_inline_decode(xdr, 4);
4972                         if (unlikely(!p))
4973                                 goto out_overflow;
4974                         pdev->mincount = be32_to_cpup(p);
4975                         dprintk("%s: Min count too small. mincnt = %u\n",
4976                                 __func__, pdev->mincount);
4977                 }
4978                 return status;
4979         }
4980
4981         p = xdr_inline_decode(xdr, 8);
4982         if (unlikely(!p))
4983                 goto out_overflow;
4984         type = be32_to_cpup(p++);
4985         if (type != pdev->layout_type) {
4986                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4987                         __func__, pdev->layout_type, type);
4988                 return -EINVAL;
4989         }
4990         /*
4991          * Get the length of the opaque device_addr4. xdr_read_pages places
4992          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4993          * and places the remaining xdr data in xdr_buf->tail
4994          */
4995         pdev->mincount = be32_to_cpup(p);
4996         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4997
4998         /* Parse notification bitmap, verifying that it is zero. */
4999         p = xdr_inline_decode(xdr, 4);
5000         if (unlikely(!p))
5001                 goto out_overflow;
5002         len = be32_to_cpup(p);
5003         if (len) {
5004                 uint32_t i;
5005
5006                 p = xdr_inline_decode(xdr, 4 * len);
5007                 if (unlikely(!p))
5008                         goto out_overflow;
5009                 for (i = 0; i < len; i++, p++) {
5010                         if (be32_to_cpup(p)) {
5011                                 dprintk("%s: notifications not supported\n",
5012                                         __func__);
5013                                 return -EIO;
5014                         }
5015                 }
5016         }
5017         return 0;
5018 out_overflow:
5019         print_overflow_msg(__func__, xdr);
5020         return -EIO;
5021 }
5022
5023 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5024                             struct nfs4_layoutget_res *res)
5025 {
5026         __be32 *p;
5027         int status;
5028         u32 layout_count;
5029         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5030         struct kvec *iov = rcvbuf->head;
5031         u32 hdrlen, recvd;
5032
5033         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5034         if (status)
5035                 return status;
5036         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5037         if (unlikely(!p))
5038                 goto out_overflow;
5039         res->return_on_close = be32_to_cpup(p++);
5040         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5041         layout_count = be32_to_cpup(p);
5042         if (!layout_count) {
5043                 dprintk("%s: server responded with empty layout array\n",
5044                         __func__);
5045                 return -EINVAL;
5046         }
5047
5048         p = xdr_inline_decode(xdr, 28);
5049         if (unlikely(!p))
5050                 goto out_overflow;
5051         p = xdr_decode_hyper(p, &res->range.offset);
5052         p = xdr_decode_hyper(p, &res->range.length);
5053         res->range.iomode = be32_to_cpup(p++);
5054         res->type = be32_to_cpup(p++);
5055         res->layoutp->len = be32_to_cpup(p);
5056
5057         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5058                 __func__,
5059                 (unsigned long)res->range.offset,
5060                 (unsigned long)res->range.length,
5061                 res->range.iomode,
5062                 res->type,
5063                 res->layoutp->len);
5064
5065         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5066         recvd = req->rq_rcv_buf.len - hdrlen;
5067         if (res->layoutp->len > recvd) {
5068                 dprintk("NFS: server cheating in layoutget reply: "
5069                                 "layout len %u > recvd %u\n",
5070                                 res->layoutp->len, recvd);
5071                 return -EINVAL;
5072         }
5073
5074         xdr_read_pages(xdr, res->layoutp->len);
5075
5076         if (layout_count > 1) {
5077                 /* We only handle a length one array at the moment.  Any
5078                  * further entries are just ignored.  Note that this means
5079                  * the client may see a response that is less than the
5080                  * minimum it requested.
5081                  */
5082                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5083                         __func__, layout_count);
5084         }
5085
5086         return 0;
5087 out_overflow:
5088         print_overflow_msg(__func__, xdr);
5089         return -EIO;
5090 }
5091
5092 static int decode_layoutcommit(struct xdr_stream *xdr,
5093                                struct rpc_rqst *req,
5094                                struct nfs4_layoutcommit_res *res)
5095 {
5096         __be32 *p;
5097         __u32 sizechanged;
5098         int status;
5099
5100         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5101         if (status)
5102                 return status;
5103
5104         p = xdr_inline_decode(xdr, 4);
5105         if (unlikely(!p))
5106                 goto out_overflow;
5107         sizechanged = be32_to_cpup(p);
5108
5109         if (sizechanged) {
5110                 /* throw away new size */
5111                 p = xdr_inline_decode(xdr, 8);
5112                 if (unlikely(!p))
5113                         goto out_overflow;
5114         }
5115         return 0;
5116 out_overflow:
5117         print_overflow_msg(__func__, xdr);
5118         return -EIO;
5119 }
5120 #endif /* CONFIG_NFS_V4_1 */
5121
5122 /*
5123  * END OF "GENERIC" DECODE ROUTINES.
5124  */
5125
5126 /*
5127  * Decode OPEN_DOWNGRADE response
5128  */
5129 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5130                                        struct xdr_stream *xdr,
5131                                        struct nfs_closeres *res)
5132 {
5133         struct compound_hdr hdr;
5134         int status;
5135
5136         status = decode_compound_hdr(xdr, &hdr);
5137         if (status)
5138                 goto out;
5139         status = decode_sequence(xdr, &res->seq_res, rqstp);
5140         if (status)
5141                 goto out;
5142         status = decode_putfh(xdr);
5143         if (status)
5144                 goto out;
5145         status = decode_open_downgrade(xdr, res);
5146         if (status != 0)
5147                 goto out;
5148         decode_getfattr(xdr, res->fattr, res->server,
5149                         !RPC_IS_ASYNC(rqstp->rq_task));
5150 out:
5151         return status;
5152 }
5153
5154 /*
5155  * Decode ACCESS response
5156  */
5157 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5158                                struct nfs4_accessres *res)
5159 {
5160         struct compound_hdr hdr;
5161         int status;
5162
5163         status = decode_compound_hdr(xdr, &hdr);
5164         if (status)
5165                 goto out;
5166         status = decode_sequence(xdr, &res->seq_res, rqstp);
5167         if (status)
5168                 goto out;
5169         status = decode_putfh(xdr);
5170         if (status != 0)
5171                 goto out;
5172         status = decode_access(xdr, res);
5173         if (status != 0)
5174                 goto out;
5175         decode_getfattr(xdr, res->fattr, res->server,
5176                         !RPC_IS_ASYNC(rqstp->rq_task));
5177 out:
5178         return status;
5179 }
5180
5181 /*
5182  * Decode LOOKUP response
5183  */
5184 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5185                                struct nfs4_lookup_res *res)
5186 {
5187         struct compound_hdr hdr;
5188         int status;
5189
5190         status = decode_compound_hdr(xdr, &hdr);
5191         if (status)
5192                 goto out;
5193         status = decode_sequence(xdr, &res->seq_res, rqstp);
5194         if (status)
5195                 goto out;
5196         status = decode_putfh(xdr);
5197         if (status)
5198                 goto out;
5199         status = decode_lookup(xdr);
5200         if (status)
5201                 goto out;
5202         status = decode_getfh(xdr, res->fh);
5203         if (status)
5204                 goto out;
5205         status = decode_getfattr(xdr, res->fattr, res->server
5206                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5207 out:
5208         return status;
5209 }
5210
5211 /*
5212  * Decode LOOKUP_ROOT response
5213  */
5214 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5215                                     struct xdr_stream *xdr,
5216                                     struct nfs4_lookup_res *res)
5217 {
5218         struct compound_hdr hdr;
5219         int status;
5220
5221         status = decode_compound_hdr(xdr, &hdr);
5222         if (status)
5223                 goto out;
5224         status = decode_sequence(xdr, &res->seq_res, rqstp);
5225         if (status)
5226                 goto out;
5227         status = decode_putrootfh(xdr);
5228         if (status)
5229                 goto out;
5230         status = decode_getfh(xdr, res->fh);
5231         if (status == 0)
5232                 status = decode_getfattr(xdr, res->fattr, res->server,
5233                                 !RPC_IS_ASYNC(rqstp->rq_task));
5234 out:
5235         return status;
5236 }
5237
5238 /*
5239  * Decode REMOVE response
5240  */
5241 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5242                                struct nfs_removeres *res)
5243 {
5244         struct compound_hdr hdr;
5245         int status;
5246
5247         status = decode_compound_hdr(xdr, &hdr);
5248         if (status)
5249                 goto out;
5250         status = decode_sequence(xdr, &res->seq_res, rqstp);
5251         if (status)
5252                 goto out;
5253         status = decode_putfh(xdr);
5254         if (status)
5255                 goto out;
5256         status = decode_remove(xdr, &res->cinfo);
5257         if (status)
5258                 goto out;
5259         decode_getfattr(xdr, res->dir_attr, res->server,
5260                         !RPC_IS_ASYNC(rqstp->rq_task));
5261 out:
5262         return status;
5263 }
5264
5265 /*
5266  * Decode RENAME response
5267  */
5268 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5269                                struct nfs_renameres *res)
5270 {
5271         struct compound_hdr hdr;
5272         int status;
5273
5274         status = decode_compound_hdr(xdr, &hdr);
5275         if (status)
5276                 goto out;
5277         status = decode_sequence(xdr, &res->seq_res, rqstp);
5278         if (status)
5279                 goto out;
5280         status = decode_putfh(xdr);
5281         if (status)
5282                 goto out;
5283         status = decode_savefh(xdr);
5284         if (status)
5285                 goto out;
5286         status = decode_putfh(xdr);
5287         if (status)
5288                 goto out;
5289         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5290         if (status)
5291                 goto out;
5292         /* Current FH is target directory */
5293         if (decode_getfattr(xdr, res->new_fattr, res->server,
5294                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5295                 goto out;
5296         status = decode_restorefh(xdr);
5297         if (status)
5298                 goto out;
5299         decode_getfattr(xdr, res->old_fattr, res->server,
5300                         !RPC_IS_ASYNC(rqstp->rq_task));
5301 out:
5302         return status;
5303 }
5304
5305 /*
5306  * Decode LINK response
5307  */
5308 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5309                              struct nfs4_link_res *res)
5310 {
5311         struct compound_hdr hdr;
5312         int status;
5313
5314         status = decode_compound_hdr(xdr, &hdr);
5315         if (status)
5316                 goto out;
5317         status = decode_sequence(xdr, &res->seq_res, rqstp);
5318         if (status)
5319                 goto out;
5320         status = decode_putfh(xdr);
5321         if (status)
5322                 goto out;
5323         status = decode_savefh(xdr);
5324         if (status)
5325                 goto out;
5326         status = decode_putfh(xdr);
5327         if (status)
5328                 goto out;
5329         status = decode_link(xdr, &res->cinfo);
5330         if (status)
5331                 goto out;
5332         /*
5333          * Note order: OP_LINK leaves the directory as the current
5334          *             filehandle.
5335          */
5336         if (decode_getfattr(xdr, res->dir_attr, res->server,
5337                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5338                 goto out;
5339         status = decode_restorefh(xdr);
5340         if (status)
5341                 goto out;
5342         decode_getfattr(xdr, res->fattr, res->server,
5343                         !RPC_IS_ASYNC(rqstp->rq_task));
5344 out:
5345         return status;
5346 }
5347
5348 /*
5349  * Decode CREATE response
5350  */
5351 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5352                                struct nfs4_create_res *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_savefh(xdr);
5367         if (status)
5368                 goto out;
5369         status = decode_create(xdr, &res->dir_cinfo);
5370         if (status)
5371                 goto out;
5372         status = decode_getfh(xdr, res->fh);
5373         if (status)
5374                 goto out;
5375         if (decode_getfattr(xdr, res->fattr, res->server,
5376                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5377                 goto out;
5378         status = decode_restorefh(xdr);
5379         if (status)
5380                 goto out;
5381         decode_getfattr(xdr, res->dir_fattr, res->server,
5382                         !RPC_IS_ASYNC(rqstp->rq_task));
5383 out:
5384         return status;
5385 }
5386
5387 /*
5388  * Decode SYMLINK response
5389  */
5390 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5391                                 struct nfs4_create_res *res)
5392 {
5393         return nfs4_xdr_dec_create(rqstp, xdr, res);
5394 }
5395
5396 /*
5397  * Decode GETATTR response
5398  */
5399 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5400                                 struct nfs4_getattr_res *res)
5401 {
5402         struct compound_hdr hdr;
5403         int status;
5404
5405         status = decode_compound_hdr(xdr, &hdr);
5406         if (status)
5407                 goto out;
5408         status = decode_sequence(xdr, &res->seq_res, rqstp);
5409         if (status)
5410                 goto out;
5411         status = decode_putfh(xdr);
5412         if (status)
5413                 goto out;
5414         status = decode_getfattr(xdr, res->fattr, res->server,
5415                         !RPC_IS_ASYNC(rqstp->rq_task));
5416 out:
5417         return status;
5418 }
5419
5420 /*
5421  * Encode an SETACL request
5422  */
5423 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5424                                 struct nfs_setaclargs *args)
5425 {
5426         struct compound_hdr hdr = {
5427                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5428         };
5429
5430         encode_compound_hdr(xdr, req, &hdr);
5431         encode_sequence(xdr, &args->seq_args, &hdr);
5432         encode_putfh(xdr, args->fh, &hdr);
5433         encode_setacl(xdr, args, &hdr);
5434         encode_nops(&hdr);
5435 }
5436
5437 /*
5438  * Decode SETACL response
5439  */
5440 static int
5441 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5442                     struct nfs_setaclres *res)
5443 {
5444         struct compound_hdr hdr;
5445         int status;
5446
5447         status = decode_compound_hdr(xdr, &hdr);
5448         if (status)
5449                 goto out;
5450         status = decode_sequence(xdr, &res->seq_res, rqstp);
5451         if (status)
5452                 goto out;
5453         status = decode_putfh(xdr);
5454         if (status)
5455                 goto out;
5456         status = decode_setattr(xdr);
5457 out:
5458         return status;
5459 }
5460
5461 /*
5462  * Decode GETACL response
5463  */
5464 static int
5465 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5466                     struct nfs_getaclres *res)
5467 {
5468         struct compound_hdr hdr;
5469         int status;
5470
5471         status = decode_compound_hdr(xdr, &hdr);
5472         if (status)
5473                 goto out;
5474         status = decode_sequence(xdr, &res->seq_res, rqstp);
5475         if (status)
5476                 goto out;
5477         status = decode_putfh(xdr);
5478         if (status)
5479                 goto out;
5480         status = decode_getacl(xdr, rqstp, &res->acl_len);
5481
5482 out:
5483         return status;
5484 }
5485
5486 /*
5487  * Decode CLOSE response
5488  */
5489 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5490                               struct nfs_closeres *res)
5491 {
5492         struct compound_hdr hdr;
5493         int status;
5494
5495         status = decode_compound_hdr(xdr, &hdr);
5496         if (status)
5497                 goto out;
5498         status = decode_sequence(xdr, &res->seq_res, rqstp);
5499         if (status)
5500                 goto out;
5501         status = decode_putfh(xdr);
5502         if (status)
5503                 goto out;
5504         status = decode_close(xdr, res);
5505         if (status != 0)
5506                 goto out;
5507         /*
5508          * Note: Server may do delete on close for this file
5509          *      in which case the getattr call will fail with
5510          *      an ESTALE error. Shouldn't be a problem,
5511          *      though, since fattr->valid will remain unset.
5512          */
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 OPEN response
5521  */
5522 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5523                              struct nfs_openres *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_savefh(xdr);
5538         if (status)
5539                 goto out;
5540         status = decode_open(xdr, res);
5541         if (status)
5542                 goto out;
5543         if (decode_getfh(xdr, &res->fh) != 0)
5544                 goto out;
5545         if (decode_getfattr(xdr, res->f_attr, res->server,
5546                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5547                 goto out;
5548         if (decode_restorefh(xdr) != 0)
5549                 goto out;
5550         decode_getfattr(xdr, res->dir_attr, res->server,
5551                         !RPC_IS_ASYNC(rqstp->rq_task));
5552 out:
5553         return status;
5554 }
5555
5556 /*
5557  * Decode OPEN_CONFIRM response
5558  */
5559 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5560                                      struct xdr_stream *xdr,
5561                                      struct nfs_open_confirmres *res)
5562 {
5563         struct compound_hdr hdr;
5564         int status;
5565
5566         status = decode_compound_hdr(xdr, &hdr);
5567         if (status)
5568                 goto out;
5569         status = decode_putfh(xdr);
5570         if (status)
5571                 goto out;
5572         status = decode_open_confirm(xdr, res);
5573 out:
5574         return status;
5575 }
5576
5577 /*
5578  * Decode OPEN response
5579  */
5580 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5581                                     struct xdr_stream *xdr,
5582                                     struct nfs_openres *res)
5583 {
5584         struct compound_hdr hdr;
5585         int status;
5586
5587         status = decode_compound_hdr(xdr, &hdr);
5588         if (status)
5589                 goto out;
5590         status = decode_sequence(xdr, &res->seq_res, rqstp);
5591         if (status)
5592                 goto out;
5593         status = decode_putfh(xdr);
5594         if (status)
5595                 goto out;
5596         status = decode_open(xdr, res);
5597         if (status)
5598                 goto out;
5599         decode_getfattr(xdr, res->f_attr, res->server,
5600                         !RPC_IS_ASYNC(rqstp->rq_task));
5601 out:
5602         return status;
5603 }
5604
5605 /*
5606  * Decode SETATTR response
5607  */
5608 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5609                                 struct xdr_stream *xdr,
5610                                 struct nfs_setattrres *res)
5611 {
5612         struct compound_hdr hdr;
5613         int status;
5614
5615         status = decode_compound_hdr(xdr, &hdr);
5616         if (status)
5617                 goto out;
5618         status = decode_sequence(xdr, &res->seq_res, rqstp);
5619         if (status)
5620                 goto out;
5621         status = decode_putfh(xdr);
5622         if (status)
5623                 goto out;
5624         status = decode_setattr(xdr);
5625         if (status)
5626                 goto out;
5627         decode_getfattr(xdr, res->fattr, res->server,
5628                         !RPC_IS_ASYNC(rqstp->rq_task));
5629 out:
5630         return status;
5631 }
5632
5633 /*
5634  * Decode LOCK response
5635  */
5636 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5637                              struct nfs_lock_res *res)
5638 {
5639         struct compound_hdr hdr;
5640         int status;
5641
5642         status = decode_compound_hdr(xdr, &hdr);
5643         if (status)
5644                 goto out;
5645         status = decode_sequence(xdr, &res->seq_res, rqstp);
5646         if (status)
5647                 goto out;
5648         status = decode_putfh(xdr);
5649         if (status)
5650                 goto out;
5651         status = decode_lock(xdr, res);
5652 out:
5653         return status;
5654 }
5655
5656 /*
5657  * Decode LOCKT response
5658  */
5659 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5660                               struct nfs_lockt_res *res)
5661 {
5662         struct compound_hdr hdr;
5663         int status;
5664
5665         status = decode_compound_hdr(xdr, &hdr);
5666         if (status)
5667                 goto out;
5668         status = decode_sequence(xdr, &res->seq_res, rqstp);
5669         if (status)
5670                 goto out;
5671         status = decode_putfh(xdr);
5672         if (status)
5673                 goto out;
5674         status = decode_lockt(xdr, res);
5675 out:
5676         return status;
5677 }
5678
5679 /*
5680  * Decode LOCKU response
5681  */
5682 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5683                               struct nfs_locku_res *res)
5684 {
5685         struct compound_hdr hdr;
5686         int status;
5687
5688         status = decode_compound_hdr(xdr, &hdr);
5689         if (status)
5690                 goto out;
5691         status = decode_sequence(xdr, &res->seq_res, rqstp);
5692         if (status)
5693                 goto out;
5694         status = decode_putfh(xdr);
5695         if (status)
5696                 goto out;
5697         status = decode_locku(xdr, res);
5698 out:
5699         return status;
5700 }
5701
5702 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5703                                           struct xdr_stream *xdr, void *dummy)
5704 {
5705         struct compound_hdr hdr;
5706         int status;
5707
5708         status = decode_compound_hdr(xdr, &hdr);
5709         if (!status)
5710                 status = decode_release_lockowner(xdr);
5711         return status;
5712 }
5713
5714 /*
5715  * Decode READLINK response
5716  */
5717 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5718                                  struct xdr_stream *xdr,
5719                                  struct nfs4_readlink_res *res)
5720 {
5721         struct compound_hdr hdr;
5722         int status;
5723
5724         status = decode_compound_hdr(xdr, &hdr);
5725         if (status)
5726                 goto out;
5727         status = decode_sequence(xdr, &res->seq_res, rqstp);
5728         if (status)
5729                 goto out;
5730         status = decode_putfh(xdr);
5731         if (status)
5732                 goto out;
5733         status = decode_readlink(xdr, rqstp);
5734 out:
5735         return status;
5736 }
5737
5738 /*
5739  * Decode READDIR response
5740  */
5741 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5742                                 struct nfs4_readdir_res *res)
5743 {
5744         struct compound_hdr hdr;
5745         int status;
5746
5747         status = decode_compound_hdr(xdr, &hdr);
5748         if (status)
5749                 goto out;
5750         status = decode_sequence(xdr, &res->seq_res, rqstp);
5751         if (status)
5752                 goto out;
5753         status = decode_putfh(xdr);
5754         if (status)
5755                 goto out;
5756         status = decode_readdir(xdr, rqstp, res);
5757 out:
5758         return status;
5759 }
5760
5761 /*
5762  * Decode Read response
5763  */
5764 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5765                              struct nfs_readres *res)
5766 {
5767         struct compound_hdr hdr;
5768         int status;
5769
5770         status = decode_compound_hdr(xdr, &hdr);
5771         if (status)
5772                 goto out;
5773         status = decode_sequence(xdr, &res->seq_res, rqstp);
5774         if (status)
5775                 goto out;
5776         status = decode_putfh(xdr);
5777         if (status)
5778                 goto out;
5779         status = decode_read(xdr, rqstp, res);
5780         if (!status)
5781                 status = res->count;
5782 out:
5783         return status;
5784 }
5785
5786 /*
5787  * Decode WRITE response
5788  */
5789 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5790                               struct nfs_writeres *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, rqstp);
5799         if (status)
5800                 goto out;
5801         status = decode_putfh(xdr);
5802         if (status)
5803                 goto out;
5804         status = decode_write(xdr, res);
5805         if (status)
5806                 goto out;
5807         if (res->fattr)
5808                 decode_getfattr(xdr, res->fattr, res->server,
5809                                 !RPC_IS_ASYNC(rqstp->rq_task));
5810         if (!status)
5811                 status = res->count;
5812 out:
5813         return status;
5814 }
5815
5816 /*
5817  * Decode COMMIT response
5818  */
5819 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5820                                struct nfs_writeres *res)
5821 {
5822         struct compound_hdr hdr;
5823         int status;
5824
5825         status = decode_compound_hdr(xdr, &hdr);
5826         if (status)
5827                 goto out;
5828         status = decode_sequence(xdr, &res->seq_res, rqstp);
5829         if (status)
5830                 goto out;
5831         status = decode_putfh(xdr);
5832         if (status)
5833                 goto out;
5834         status = decode_commit(xdr, res);
5835         if (status)
5836                 goto out;
5837         if (res->fattr)
5838                 decode_getfattr(xdr, res->fattr, res->server,
5839                                 !RPC_IS_ASYNC(rqstp->rq_task));
5840 out:
5841         return status;
5842 }
5843
5844 /*
5845  * Decode FSINFO response
5846  */
5847 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5848                                struct nfs4_fsinfo_res *res)
5849 {
5850         struct compound_hdr hdr;
5851         int status;
5852
5853         status = decode_compound_hdr(xdr, &hdr);
5854         if (!status)
5855                 status = decode_sequence(xdr, &res->seq_res, req);
5856         if (!status)
5857                 status = decode_putfh(xdr);
5858         if (!status)
5859                 status = decode_fsinfo(xdr, res->fsinfo);
5860         return status;
5861 }
5862
5863 /*
5864  * Decode PATHCONF response
5865  */
5866 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5867                                  struct nfs4_pathconf_res *res)
5868 {
5869         struct compound_hdr hdr;
5870         int status;
5871
5872         status = decode_compound_hdr(xdr, &hdr);
5873         if (!status)
5874                 status = decode_sequence(xdr, &res->seq_res, req);
5875         if (!status)
5876                 status = decode_putfh(xdr);
5877         if (!status)
5878                 status = decode_pathconf(xdr, res->pathconf);
5879         return status;
5880 }
5881
5882 /*
5883  * Decode STATFS response
5884  */
5885 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5886                                struct nfs4_statfs_res *res)
5887 {
5888         struct compound_hdr hdr;
5889         int status;
5890
5891         status = decode_compound_hdr(xdr, &hdr);
5892         if (!status)
5893                 status = decode_sequence(xdr, &res->seq_res, req);
5894         if (!status)
5895                 status = decode_putfh(xdr);
5896         if (!status)
5897                 status = decode_statfs(xdr, res->fsstat);
5898         return status;
5899 }
5900
5901 /*
5902  * Decode GETATTR_BITMAP response
5903  */
5904 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5905                                     struct xdr_stream *xdr,
5906                                     struct nfs4_server_caps_res *res)
5907 {
5908         struct compound_hdr hdr;
5909         int status;
5910
5911         status = decode_compound_hdr(xdr, &hdr);
5912         if (status)
5913                 goto out;
5914         status = decode_sequence(xdr, &res->seq_res, req);
5915         if (status)
5916                 goto out;
5917         status = decode_putfh(xdr);
5918         if (status)
5919                 goto out;
5920         status = decode_server_caps(xdr, res);
5921 out:
5922         return status;
5923 }
5924
5925 /*
5926  * Decode RENEW response
5927  */
5928 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5929                               void *__unused)
5930 {
5931         struct compound_hdr hdr;
5932         int status;
5933
5934         status = decode_compound_hdr(xdr, &hdr);
5935         if (!status)
5936                 status = decode_renew(xdr);
5937         return status;
5938 }
5939
5940 /*
5941  * Decode SETCLIENTID response
5942  */
5943 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5944                                     struct xdr_stream *xdr,
5945                                     struct nfs4_setclientid_res *res)
5946 {
5947         struct compound_hdr hdr;
5948         int status;
5949
5950         status = decode_compound_hdr(xdr, &hdr);
5951         if (!status)
5952                 status = decode_setclientid(xdr, res);
5953         return status;
5954 }
5955
5956 /*
5957  * Decode SETCLIENTID_CONFIRM response
5958  */
5959 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5960                                             struct xdr_stream *xdr,
5961                                             struct nfs_fsinfo *fsinfo)
5962 {
5963         struct compound_hdr hdr;
5964         int status;
5965
5966         status = decode_compound_hdr(xdr, &hdr);
5967         if (!status)
5968                 status = decode_setclientid_confirm(xdr);
5969         if (!status)
5970                 status = decode_putrootfh(xdr);
5971         if (!status)
5972                 status = decode_fsinfo(xdr, fsinfo);
5973         return status;
5974 }
5975
5976 /*
5977  * Decode DELEGRETURN response
5978  */
5979 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5980                                     struct xdr_stream *xdr,
5981                                     struct nfs4_delegreturnres *res)
5982 {
5983         struct compound_hdr hdr;
5984         int status;
5985
5986         status = decode_compound_hdr(xdr, &hdr);
5987         if (status)
5988                 goto out;
5989         status = decode_sequence(xdr, &res->seq_res, rqstp);
5990         if (status)
5991                 goto out;
5992         status = decode_putfh(xdr);
5993         if (status != 0)
5994                 goto out;
5995         status = decode_delegreturn(xdr);
5996         if (status != 0)
5997                 goto out;
5998         decode_getfattr(xdr, res->fattr, res->server,
5999                         !RPC_IS_ASYNC(rqstp->rq_task));
6000 out:
6001         return status;
6002 }
6003
6004 /*
6005  * Decode FS_LOCATIONS response
6006  */
6007 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6008                                      struct xdr_stream *xdr,
6009                                      struct nfs4_fs_locations_res *res)
6010 {
6011         struct compound_hdr hdr;
6012         int status;
6013
6014         status = decode_compound_hdr(xdr, &hdr);
6015         if (status)
6016                 goto out;
6017         status = decode_sequence(xdr, &res->seq_res, req);
6018         if (status)
6019                 goto out;
6020         status = decode_putfh(xdr);
6021         if (status)
6022                 goto out;
6023         status = decode_lookup(xdr);
6024         if (status)
6025                 goto out;
6026         xdr_enter_page(xdr, PAGE_SIZE);
6027         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6028                                  res->fs_locations->server,
6029                                  !RPC_IS_ASYNC(req->rq_task));
6030 out:
6031         return status;
6032 }
6033
6034 #if defined(CONFIG_NFS_V4_1)
6035 /*
6036  * Decode EXCHANGE_ID response
6037  */
6038 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6039                                     struct xdr_stream *xdr,
6040                                     void *res)
6041 {
6042         struct compound_hdr hdr;
6043         int status;
6044
6045         status = decode_compound_hdr(xdr, &hdr);
6046         if (!status)
6047                 status = decode_exchange_id(xdr, res);
6048         return status;
6049 }
6050
6051 /*
6052  * Decode CREATE_SESSION response
6053  */
6054 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6055                                        struct xdr_stream *xdr,
6056                                        struct nfs41_create_session_res *res)
6057 {
6058         struct compound_hdr hdr;
6059         int status;
6060
6061         status = decode_compound_hdr(xdr, &hdr);
6062         if (!status)
6063                 status = decode_create_session(xdr, res);
6064         return status;
6065 }
6066
6067 /*
6068  * Decode DESTROY_SESSION response
6069  */
6070 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6071                                         struct xdr_stream *xdr,
6072                                         void *res)
6073 {
6074         struct compound_hdr hdr;
6075         int status;
6076
6077         status = decode_compound_hdr(xdr, &hdr);
6078         if (!status)
6079                 status = decode_destroy_session(xdr, res);
6080         return status;
6081 }
6082
6083 /*
6084  * Decode SEQUENCE response
6085  */
6086 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6087                                  struct xdr_stream *xdr,
6088                                  struct nfs4_sequence_res *res)
6089 {
6090         struct compound_hdr hdr;
6091         int status;
6092
6093         status = decode_compound_hdr(xdr, &hdr);
6094         if (!status)
6095                 status = decode_sequence(xdr, res, rqstp);
6096         return status;
6097 }
6098
6099 /*
6100  * Decode GET_LEASE_TIME response
6101  */
6102 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6103                                        struct xdr_stream *xdr,
6104                                        struct nfs4_get_lease_time_res *res)
6105 {
6106         struct compound_hdr hdr;
6107         int status;
6108
6109         status = decode_compound_hdr(xdr, &hdr);
6110         if (!status)
6111                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6112         if (!status)
6113                 status = decode_putrootfh(xdr);
6114         if (!status)
6115                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6116         return status;
6117 }
6118
6119 /*
6120  * Decode RECLAIM_COMPLETE response
6121  */
6122 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6123                                          struct xdr_stream *xdr,
6124                                          struct nfs41_reclaim_complete_res *res)
6125 {
6126         struct compound_hdr hdr;
6127         int status;
6128
6129         status = decode_compound_hdr(xdr, &hdr);
6130         if (!status)
6131                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6132         if (!status)
6133                 status = decode_reclaim_complete(xdr, (void *)NULL);
6134         return status;
6135 }
6136
6137 /*
6138  * Decode GETDEVINFO response
6139  */
6140 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6141                                       struct xdr_stream *xdr,
6142                                       struct nfs4_getdeviceinfo_res *res)
6143 {
6144         struct compound_hdr hdr;
6145         int status;
6146
6147         status = decode_compound_hdr(xdr, &hdr);
6148         if (status != 0)
6149                 goto out;
6150         status = decode_sequence(xdr, &res->seq_res, rqstp);
6151         if (status != 0)
6152                 goto out;
6153         status = decode_getdeviceinfo(xdr, res->pdev);
6154 out:
6155         return status;
6156 }
6157
6158 /*
6159  * Decode LAYOUTGET response
6160  */
6161 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6162                                   struct xdr_stream *xdr,
6163                                   struct nfs4_layoutget_res *res)
6164 {
6165         struct compound_hdr hdr;
6166         int status;
6167
6168         status = decode_compound_hdr(xdr, &hdr);
6169         if (status)
6170                 goto out;
6171         status = decode_sequence(xdr, &res->seq_res, rqstp);
6172         if (status)
6173                 goto out;
6174         status = decode_putfh(xdr);
6175         if (status)
6176                 goto out;
6177         status = decode_layoutget(xdr, rqstp, res);
6178 out:
6179         return status;
6180 }
6181
6182 /*
6183  * Decode LAYOUTCOMMIT response
6184  */
6185 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6186                                      struct xdr_stream *xdr,
6187                                      struct nfs4_layoutcommit_res *res)
6188 {
6189         struct compound_hdr hdr;
6190         int status;
6191
6192         status = decode_compound_hdr(xdr, &hdr);
6193         if (status)
6194                 goto out;
6195         status = decode_sequence(xdr, &res->seq_res, rqstp);
6196         if (status)
6197                 goto out;
6198         status = decode_putfh(xdr);
6199         if (status)
6200                 goto out;
6201         status = decode_layoutcommit(xdr, rqstp, res);
6202         if (status)
6203                 goto out;
6204         decode_getfattr(xdr, res->fattr, res->server,
6205                         !RPC_IS_ASYNC(rqstp->rq_task));
6206 out:
6207         return status;
6208 }
6209 #endif /* CONFIG_NFS_V4_1 */
6210
6211 /**
6212  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6213  *                      the local page cache.
6214  * @xdr: XDR stream where entry resides
6215  * @entry: buffer to fill in with entry data
6216  * @plus: boolean indicating whether this should be a readdirplus entry
6217  *
6218  * Returns zero if successful, otherwise a negative errno value is
6219  * returned.
6220  *
6221  * This function is not invoked during READDIR reply decoding, but
6222  * rather whenever an application invokes the getdents(2) system call
6223  * on a directory already in our cache.
6224  */
6225 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6226                        int plus)
6227 {
6228         uint32_t bitmap[2] = {0};
6229         uint32_t len;
6230         __be32 *p = xdr_inline_decode(xdr, 4);
6231         if (unlikely(!p))
6232                 goto out_overflow;
6233         if (*p == xdr_zero) {
6234                 p = xdr_inline_decode(xdr, 4);
6235                 if (unlikely(!p))
6236                         goto out_overflow;
6237                 if (*p == xdr_zero)
6238                         return -EAGAIN;
6239                 entry->eof = 1;
6240                 return -EBADCOOKIE;
6241         }
6242
6243         p = xdr_inline_decode(xdr, 12);
6244         if (unlikely(!p))
6245                 goto out_overflow;
6246         entry->prev_cookie = entry->cookie;
6247         p = xdr_decode_hyper(p, &entry->cookie);
6248         entry->len = be32_to_cpup(p);
6249
6250         p = xdr_inline_decode(xdr, entry->len);
6251         if (unlikely(!p))
6252                 goto out_overflow;
6253         entry->name = (const char *) p;
6254
6255         /*
6256          * In case the server doesn't return an inode number,
6257          * we fake one here.  (We don't use inode number 0,
6258          * since glibc seems to choke on it...)
6259          */
6260         entry->ino = 1;
6261         entry->fattr->valid = 0;
6262
6263         if (decode_attr_bitmap(xdr, bitmap) < 0)
6264                 goto out_overflow;
6265
6266         if (decode_attr_length(xdr, &len, &p) < 0)
6267                 goto out_overflow;
6268
6269         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6270                                         entry->server, 1) < 0)
6271                 goto out_overflow;
6272         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6273                 entry->ino = entry->fattr->fileid;
6274
6275         entry->d_type = DT_UNKNOWN;
6276         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6277                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6278
6279         return 0;
6280
6281 out_overflow:
6282         print_overflow_msg(__func__, xdr);
6283         return -EAGAIN;
6284 }
6285
6286 /*
6287  * We need to translate between nfs status return values and
6288  * the local errno values which may not be the same.
6289  */
6290 static struct {
6291         int stat;
6292         int errno;
6293 } nfs_errtbl[] = {
6294         { NFS4_OK,              0               },
6295         { NFS4ERR_PERM,         -EPERM          },
6296         { NFS4ERR_NOENT,        -ENOENT         },
6297         { NFS4ERR_IO,           -errno_NFSERR_IO},
6298         { NFS4ERR_NXIO,         -ENXIO          },
6299         { NFS4ERR_ACCESS,       -EACCES         },
6300         { NFS4ERR_EXIST,        -EEXIST         },
6301         { NFS4ERR_XDEV,         -EXDEV          },
6302         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6303         { NFS4ERR_ISDIR,        -EISDIR         },
6304         { NFS4ERR_INVAL,        -EINVAL         },
6305         { NFS4ERR_FBIG,         -EFBIG          },
6306         { NFS4ERR_NOSPC,        -ENOSPC         },
6307         { NFS4ERR_ROFS,         -EROFS          },
6308         { NFS4ERR_MLINK,        -EMLINK         },
6309         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6310         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6311         { NFS4ERR_DQUOT,        -EDQUOT         },
6312         { NFS4ERR_STALE,        -ESTALE         },
6313         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6314         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6315         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6316         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6317         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6318         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6319         { NFS4ERR_LOCKED,       -EAGAIN         },
6320         { NFS4ERR_SYMLINK,      -ELOOP          },
6321         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6322         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6323         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
6324                                                     * to be handled by a
6325                                                     * middle-layer.
6326                                                     */
6327         { -1,                   -EIO            }
6328 };
6329
6330 /*
6331  * Convert an NFS error code to a local one.
6332  * This one is used jointly by NFSv2 and NFSv3.
6333  */
6334 static int
6335 nfs4_stat_to_errno(int stat)
6336 {
6337         int i;
6338         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6339                 if (nfs_errtbl[i].stat == stat)
6340                         return nfs_errtbl[i].errno;
6341         }
6342         if (stat <= 10000 || stat > 10100) {
6343                 /* The server is looney tunes. */
6344                 return -EREMOTEIO;
6345         }
6346         /* If we cannot translate the error, the recovery routines should
6347          * handle it.
6348          * Note: remaining NFSv4 error codes have values > 10000, so should
6349          * not conflict with native Linux error codes.
6350          */
6351         return -stat;
6352 }
6353
6354 #define PROC(proc, argtype, restype)                            \
6355 [NFSPROC4_CLNT_##proc] = {                                      \
6356         .p_proc   = NFSPROC4_COMPOUND,                          \
6357         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6358         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6359         .p_arglen = NFS4_##argtype##_sz,                        \
6360         .p_replen = NFS4_##restype##_sz,                        \
6361         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6362         .p_name   = #proc,                                      \
6363 }
6364
6365 struct rpc_procinfo     nfs4_procedures[] = {
6366         PROC(READ,              enc_read,               dec_read),
6367         PROC(WRITE,             enc_write,              dec_write),
6368         PROC(COMMIT,            enc_commit,             dec_commit),
6369         PROC(OPEN,              enc_open,               dec_open),
6370         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6371         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6372         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6373         PROC(CLOSE,             enc_close,              dec_close),
6374         PROC(SETATTR,           enc_setattr,            dec_setattr),
6375         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6376         PROC(RENEW,             enc_renew,              dec_renew),
6377         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6378         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6379         PROC(LOCK,              enc_lock,               dec_lock),
6380         PROC(LOCKT,             enc_lockt,              dec_lockt),
6381         PROC(LOCKU,             enc_locku,              dec_locku),
6382         PROC(ACCESS,            enc_access,             dec_access),
6383         PROC(GETATTR,           enc_getattr,            dec_getattr),
6384         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6385         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6386         PROC(REMOVE,            enc_remove,             dec_remove),
6387         PROC(RENAME,            enc_rename,             dec_rename),
6388         PROC(LINK,              enc_link,               dec_link),
6389         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6390         PROC(CREATE,            enc_create,             dec_create),
6391         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6392         PROC(STATFS,            enc_statfs,             dec_statfs),
6393         PROC(READLINK,          enc_readlink,           dec_readlink),
6394         PROC(READDIR,           enc_readdir,            dec_readdir),
6395         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6396         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6397         PROC(GETACL,            enc_getacl,             dec_getacl),
6398         PROC(SETACL,            enc_setacl,             dec_setacl),
6399         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6400         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6401 #if defined(CONFIG_NFS_V4_1)
6402         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6403         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6404         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6405         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6406         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6407         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6408         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6409         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6410         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
6411 #endif /* CONFIG_NFS_V4_1 */
6412 };
6413
6414 struct rpc_version              nfs_version4 = {
6415         .number                 = 4,
6416         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6417         .procs                  = nfs4_procedures
6418 };
6419
6420 /*
6421  * Local variables:
6422  *  c-basic-offset: 8
6423  * End:
6424  */