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         encode_nops(&hdr);
2660 }
2661
2662 /*
2663  *  Encode LAYOUTCOMMIT request
2664  */
2665 static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2666                                      struct xdr_stream *xdr,
2667                                      struct nfs4_layoutcommit_args *args)
2668 {
2669         struct compound_hdr hdr = {
2670                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2671         };
2672
2673         encode_compound_hdr(xdr, req, &hdr);
2674         encode_sequence(xdr, &args->seq_args, &hdr);
2675         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2676         encode_layoutcommit(xdr, args, &hdr);
2677         encode_getfattr(xdr, args->bitmask, &hdr);
2678         encode_nops(&hdr);
2679         return 0;
2680 }
2681 #endif /* CONFIG_NFS_V4_1 */
2682
2683 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2684 {
2685         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2686                 "Remaining buffer length is %tu words.\n",
2687                 func, xdr->end - xdr->p);
2688 }
2689
2690 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2691 {
2692         __be32 *p;
2693
2694         p = xdr_inline_decode(xdr, 4);
2695         if (unlikely(!p))
2696                 goto out_overflow;
2697         *len = be32_to_cpup(p);
2698         p = xdr_inline_decode(xdr, *len);
2699         if (unlikely(!p))
2700                 goto out_overflow;
2701         *string = (char *)p;
2702         return 0;
2703 out_overflow:
2704         print_overflow_msg(__func__, xdr);
2705         return -EIO;
2706 }
2707
2708 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2709 {
2710         __be32 *p;
2711
2712         p = xdr_inline_decode(xdr, 8);
2713         if (unlikely(!p))
2714                 goto out_overflow;
2715         hdr->status = be32_to_cpup(p++);
2716         hdr->taglen = be32_to_cpup(p);
2717
2718         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2719         if (unlikely(!p))
2720                 goto out_overflow;
2721         hdr->tag = (char *)p;
2722         p += XDR_QUADLEN(hdr->taglen);
2723         hdr->nops = be32_to_cpup(p);
2724         if (unlikely(hdr->nops < 1))
2725                 return nfs4_stat_to_errno(hdr->status);
2726         return 0;
2727 out_overflow:
2728         print_overflow_msg(__func__, xdr);
2729         return -EIO;
2730 }
2731
2732 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2733 {
2734         __be32 *p;
2735         uint32_t opnum;
2736         int32_t nfserr;
2737
2738         p = xdr_inline_decode(xdr, 8);
2739         if (unlikely(!p))
2740                 goto out_overflow;
2741         opnum = be32_to_cpup(p++);
2742         if (opnum != expected) {
2743                 dprintk("nfs: Server returned operation"
2744                         " %d but we issued a request for %d\n",
2745                                 opnum, expected);
2746                 return -EIO;
2747         }
2748         nfserr = be32_to_cpup(p);
2749         if (nfserr != NFS_OK)
2750                 return nfs4_stat_to_errno(nfserr);
2751         return 0;
2752 out_overflow:
2753         print_overflow_msg(__func__, xdr);
2754         return -EIO;
2755 }
2756
2757 /* Dummy routine */
2758 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2759 {
2760         __be32 *p;
2761         unsigned int strlen;
2762         char *str;
2763
2764         p = xdr_inline_decode(xdr, 12);
2765         if (likely(p))
2766                 return decode_opaque_inline(xdr, &strlen, &str);
2767         print_overflow_msg(__func__, xdr);
2768         return -EIO;
2769 }
2770
2771 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2772 {
2773         uint32_t bmlen;
2774         __be32 *p;
2775
2776         p = xdr_inline_decode(xdr, 4);
2777         if (unlikely(!p))
2778                 goto out_overflow;
2779         bmlen = be32_to_cpup(p);
2780
2781         bitmap[0] = bitmap[1] = 0;
2782         p = xdr_inline_decode(xdr, (bmlen << 2));
2783         if (unlikely(!p))
2784                 goto out_overflow;
2785         if (bmlen > 0) {
2786                 bitmap[0] = be32_to_cpup(p++);
2787                 if (bmlen > 1)
2788                         bitmap[1] = be32_to_cpup(p);
2789         }
2790         return 0;
2791 out_overflow:
2792         print_overflow_msg(__func__, xdr);
2793         return -EIO;
2794 }
2795
2796 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2797 {
2798         __be32 *p;
2799
2800         p = xdr_inline_decode(xdr, 4);
2801         if (unlikely(!p))
2802                 goto out_overflow;
2803         *attrlen = be32_to_cpup(p);
2804         *savep = xdr->p;
2805         return 0;
2806 out_overflow:
2807         print_overflow_msg(__func__, xdr);
2808         return -EIO;
2809 }
2810
2811 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2812 {
2813         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2814                 int ret;
2815                 ret = decode_attr_bitmap(xdr, bitmask);
2816                 if (unlikely(ret < 0))
2817                         return ret;
2818                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2819         } else
2820                 bitmask[0] = bitmask[1] = 0;
2821         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2822         return 0;
2823 }
2824
2825 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2826 {
2827         __be32 *p;
2828         int ret = 0;
2829
2830         *type = 0;
2831         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2832                 return -EIO;
2833         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2834                 p = xdr_inline_decode(xdr, 4);
2835                 if (unlikely(!p))
2836                         goto out_overflow;
2837                 *type = be32_to_cpup(p);
2838                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2839                         dprintk("%s: bad type %d\n", __func__, *type);
2840                         return -EIO;
2841                 }
2842                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2843                 ret = NFS_ATTR_FATTR_TYPE;
2844         }
2845         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2846         return ret;
2847 out_overflow:
2848         print_overflow_msg(__func__, xdr);
2849         return -EIO;
2850 }
2851
2852 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2853 {
2854         __be32 *p;
2855         int ret = 0;
2856
2857         *change = 0;
2858         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2859                 return -EIO;
2860         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2861                 p = xdr_inline_decode(xdr, 8);
2862                 if (unlikely(!p))
2863                         goto out_overflow;
2864                 xdr_decode_hyper(p, change);
2865                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2866                 ret = NFS_ATTR_FATTR_CHANGE;
2867         }
2868         dprintk("%s: change attribute=%Lu\n", __func__,
2869                         (unsigned long long)*change);
2870         return ret;
2871 out_overflow:
2872         print_overflow_msg(__func__, xdr);
2873         return -EIO;
2874 }
2875
2876 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2877 {
2878         __be32 *p;
2879         int ret = 0;
2880
2881         *size = 0;
2882         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2883                 return -EIO;
2884         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2885                 p = xdr_inline_decode(xdr, 8);
2886                 if (unlikely(!p))
2887                         goto out_overflow;
2888                 xdr_decode_hyper(p, size);
2889                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2890                 ret = NFS_ATTR_FATTR_SIZE;
2891         }
2892         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2893         return ret;
2894 out_overflow:
2895         print_overflow_msg(__func__, xdr);
2896         return -EIO;
2897 }
2898
2899 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2900 {
2901         __be32 *p;
2902
2903         *res = 0;
2904         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2905                 return -EIO;
2906         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2907                 p = xdr_inline_decode(xdr, 4);
2908                 if (unlikely(!p))
2909                         goto out_overflow;
2910                 *res = be32_to_cpup(p);
2911                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2912         }
2913         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2914         return 0;
2915 out_overflow:
2916         print_overflow_msg(__func__, xdr);
2917         return -EIO;
2918 }
2919
2920 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2921 {
2922         __be32 *p;
2923
2924         *res = 0;
2925         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2926                 return -EIO;
2927         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2928                 p = xdr_inline_decode(xdr, 4);
2929                 if (unlikely(!p))
2930                         goto out_overflow;
2931                 *res = be32_to_cpup(p);
2932                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2933         }
2934         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2935         return 0;
2936 out_overflow:
2937         print_overflow_msg(__func__, xdr);
2938         return -EIO;
2939 }
2940
2941 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2942 {
2943         __be32 *p;
2944         int ret = 0;
2945
2946         fsid->major = 0;
2947         fsid->minor = 0;
2948         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2949                 return -EIO;
2950         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2951                 p = xdr_inline_decode(xdr, 16);
2952                 if (unlikely(!p))
2953                         goto out_overflow;
2954                 p = xdr_decode_hyper(p, &fsid->major);
2955                 xdr_decode_hyper(p, &fsid->minor);
2956                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2957                 ret = NFS_ATTR_FATTR_FSID;
2958         }
2959         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2960                         (unsigned long long)fsid->major,
2961                         (unsigned long long)fsid->minor);
2962         return ret;
2963 out_overflow:
2964         print_overflow_msg(__func__, xdr);
2965         return -EIO;
2966 }
2967
2968 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2969 {
2970         __be32 *p;
2971
2972         *res = 60;
2973         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2974                 return -EIO;
2975         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2976                 p = xdr_inline_decode(xdr, 4);
2977                 if (unlikely(!p))
2978                         goto out_overflow;
2979                 *res = be32_to_cpup(p);
2980                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2981         }
2982         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2983         return 0;
2984 out_overflow:
2985         print_overflow_msg(__func__, xdr);
2986         return -EIO;
2987 }
2988
2989 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2990 {
2991         __be32 *p;
2992
2993         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2994                 return -EIO;
2995         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2996                 p = xdr_inline_decode(xdr, 4);
2997                 if (unlikely(!p))
2998                         goto out_overflow;
2999                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3000         }
3001         return 0;
3002 out_overflow:
3003         print_overflow_msg(__func__, xdr);
3004         return -EIO;
3005 }
3006
3007 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3008 {
3009         __be32 *p;
3010         int len;
3011
3012         if (fh != NULL)
3013                 memset(fh, 0, sizeof(*fh));
3014
3015         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3016                 return -EIO;
3017         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3018                 p = xdr_inline_decode(xdr, 4);
3019                 if (unlikely(!p))
3020                         goto out_overflow;
3021                 len = be32_to_cpup(p);
3022                 if (len > NFS4_FHSIZE)
3023                         return -EIO;
3024                 p = xdr_inline_decode(xdr, len);
3025                 if (unlikely(!p))
3026                         goto out_overflow;
3027                 if (fh != NULL) {
3028                         memcpy(fh->data, p, len);
3029                         fh->size = len;
3030                 }
3031                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3032         }
3033         return 0;
3034 out_overflow:
3035         print_overflow_msg(__func__, xdr);
3036         return -EIO;
3037 }
3038
3039 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3040 {
3041         __be32 *p;
3042
3043         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3044         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3045                 return -EIO;
3046         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3047                 p = xdr_inline_decode(xdr, 4);
3048                 if (unlikely(!p))
3049                         goto out_overflow;
3050                 *res = be32_to_cpup(p);
3051                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3052         }
3053         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3054         return 0;
3055 out_overflow:
3056         print_overflow_msg(__func__, xdr);
3057         return -EIO;
3058 }
3059
3060 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3061 {
3062         __be32 *p;
3063         int ret = 0;
3064
3065         *fileid = 0;
3066         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3067                 return -EIO;
3068         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3069                 p = xdr_inline_decode(xdr, 8);
3070                 if (unlikely(!p))
3071                         goto out_overflow;
3072                 xdr_decode_hyper(p, fileid);
3073                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3074                 ret = NFS_ATTR_FATTR_FILEID;
3075         }
3076         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3077         return ret;
3078 out_overflow:
3079         print_overflow_msg(__func__, xdr);
3080         return -EIO;
3081 }
3082
3083 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3084 {
3085         __be32 *p;
3086         int ret = 0;
3087
3088         *fileid = 0;
3089         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3090                 return -EIO;
3091         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3092                 p = xdr_inline_decode(xdr, 8);
3093                 if (unlikely(!p))
3094                         goto out_overflow;
3095                 xdr_decode_hyper(p, fileid);
3096                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3097                 ret = NFS_ATTR_FATTR_FILEID;
3098         }
3099         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3100         return ret;
3101 out_overflow:
3102         print_overflow_msg(__func__, xdr);
3103         return -EIO;
3104 }
3105
3106 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3107 {
3108         __be32 *p;
3109         int status = 0;
3110
3111         *res = 0;
3112         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3113                 return -EIO;
3114         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3115                 p = xdr_inline_decode(xdr, 8);
3116                 if (unlikely(!p))
3117                         goto out_overflow;
3118                 xdr_decode_hyper(p, res);
3119                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3120         }
3121         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3122         return status;
3123 out_overflow:
3124         print_overflow_msg(__func__, xdr);
3125         return -EIO;
3126 }
3127
3128 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3129 {
3130         __be32 *p;
3131         int status = 0;
3132
3133         *res = 0;
3134         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3135                 return -EIO;
3136         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3137                 p = xdr_inline_decode(xdr, 8);
3138                 if (unlikely(!p))
3139                         goto out_overflow;
3140                 xdr_decode_hyper(p, res);
3141                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3142         }
3143         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3144         return status;
3145 out_overflow:
3146         print_overflow_msg(__func__, xdr);
3147         return -EIO;
3148 }
3149
3150 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3151 {
3152         __be32 *p;
3153         int status = 0;
3154
3155         *res = 0;
3156         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3157                 return -EIO;
3158         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3159                 p = xdr_inline_decode(xdr, 8);
3160                 if (unlikely(!p))
3161                         goto out_overflow;
3162                 xdr_decode_hyper(p, res);
3163                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3164         }
3165         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3166         return status;
3167 out_overflow:
3168         print_overflow_msg(__func__, xdr);
3169         return -EIO;
3170 }
3171
3172 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3173 {
3174         u32 n;
3175         __be32 *p;
3176         int status = 0;
3177
3178         p = xdr_inline_decode(xdr, 4);
3179         if (unlikely(!p))
3180                 goto out_overflow;
3181         n = be32_to_cpup(p);
3182         if (n == 0)
3183                 goto root_path;
3184         dprintk("path ");
3185         path->ncomponents = 0;
3186         while (path->ncomponents < n) {
3187                 struct nfs4_string *component = &path->components[path->ncomponents];
3188                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3189                 if (unlikely(status != 0))
3190                         goto out_eio;
3191                 if (path->ncomponents != n)
3192                         dprintk("/");
3193                 dprintk("%s", component->data);
3194                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3195                         path->ncomponents++;
3196                 else {
3197                         dprintk("cannot parse %d components in path\n", n);
3198                         goto out_eio;
3199                 }
3200         }
3201 out:
3202         dprintk("\n");
3203         return status;
3204 root_path:
3205 /* a root pathname is sent as a zero component4 */
3206         path->ncomponents = 1;
3207         path->components[0].len=0;
3208         path->components[0].data=NULL;
3209         dprintk("path /\n");
3210         goto out;
3211 out_eio:
3212         dprintk(" status %d", status);
3213         status = -EIO;
3214         goto out;
3215 out_overflow:
3216         print_overflow_msg(__func__, xdr);
3217         return -EIO;
3218 }
3219
3220 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3221 {
3222         int n;
3223         __be32 *p;
3224         int status = -EIO;
3225
3226         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3227                 goto out;
3228         status = 0;
3229         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3230                 goto out;
3231         dprintk("%s: fsroot ", __func__);
3232         status = decode_pathname(xdr, &res->fs_path);
3233         if (unlikely(status != 0))
3234                 goto out;
3235         p = xdr_inline_decode(xdr, 4);
3236         if (unlikely(!p))
3237                 goto out_overflow;
3238         n = be32_to_cpup(p);
3239         if (n <= 0)
3240                 goto out_eio;
3241         res->nlocations = 0;
3242         while (res->nlocations < n) {
3243                 u32 m;
3244                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3245
3246                 p = xdr_inline_decode(xdr, 4);
3247                 if (unlikely(!p))
3248                         goto out_overflow;
3249                 m = be32_to_cpup(p);
3250
3251                 loc->nservers = 0;
3252                 dprintk("%s: servers ", __func__);
3253                 while (loc->nservers < m) {
3254                         struct nfs4_string *server = &loc->servers[loc->nservers];
3255                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3256                         if (unlikely(status != 0))
3257                                 goto out_eio;
3258                         dprintk("%s ", server->data);
3259                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3260                                 loc->nservers++;
3261                         else {
3262                                 unsigned int i;
3263                                 dprintk("%s: using first %u of %u servers "
3264                                         "returned for location %u\n",
3265                                                 __func__,
3266                                                 NFS4_FS_LOCATION_MAXSERVERS,
3267                                                 m, res->nlocations);
3268                                 for (i = loc->nservers; i < m; i++) {
3269                                         unsigned int len;
3270                                         char *data;
3271                                         status = decode_opaque_inline(xdr, &len, &data);
3272                                         if (unlikely(status != 0))
3273                                                 goto out_eio;
3274                                 }
3275                         }
3276                 }
3277                 status = decode_pathname(xdr, &loc->rootpath);
3278                 if (unlikely(status != 0))
3279                         goto out_eio;
3280                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3281                         res->nlocations++;
3282         }
3283         if (res->nlocations != 0)
3284                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3285 out:
3286         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3287         return status;
3288 out_overflow:
3289         print_overflow_msg(__func__, xdr);
3290 out_eio:
3291         status = -EIO;
3292         goto out;
3293 }
3294
3295 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3296 {
3297         __be32 *p;
3298         int status = 0;
3299
3300         *res = 0;
3301         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3302                 return -EIO;
3303         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3304                 p = xdr_inline_decode(xdr, 8);
3305                 if (unlikely(!p))
3306                         goto out_overflow;
3307                 xdr_decode_hyper(p, res);
3308                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3309         }
3310         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3311         return status;
3312 out_overflow:
3313         print_overflow_msg(__func__, xdr);
3314         return -EIO;
3315 }
3316
3317 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3318 {
3319         __be32 *p;
3320         int status = 0;
3321
3322         *maxlink = 1;
3323         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3324                 return -EIO;
3325         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3326                 p = xdr_inline_decode(xdr, 4);
3327                 if (unlikely(!p))
3328                         goto out_overflow;
3329                 *maxlink = be32_to_cpup(p);
3330                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3331         }
3332         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3333         return status;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336         return -EIO;
3337 }
3338
3339 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3340 {
3341         __be32 *p;
3342         int status = 0;
3343
3344         *maxname = 1024;
3345         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3346                 return -EIO;
3347         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3348                 p = xdr_inline_decode(xdr, 4);
3349                 if (unlikely(!p))
3350                         goto out_overflow;
3351                 *maxname = be32_to_cpup(p);
3352                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3353         }
3354         dprintk("%s: maxname=%u\n", __func__, *maxname);
3355         return status;
3356 out_overflow:
3357         print_overflow_msg(__func__, xdr);
3358         return -EIO;
3359 }
3360
3361 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3362 {
3363         __be32 *p;
3364         int status = 0;
3365
3366         *res = 1024;
3367         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3368                 return -EIO;
3369         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3370                 uint64_t maxread;
3371                 p = xdr_inline_decode(xdr, 8);
3372                 if (unlikely(!p))
3373                         goto out_overflow;
3374                 xdr_decode_hyper(p, &maxread);
3375                 if (maxread > 0x7FFFFFFF)
3376                         maxread = 0x7FFFFFFF;
3377                 *res = (uint32_t)maxread;
3378                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3379         }
3380         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3381         return status;
3382 out_overflow:
3383         print_overflow_msg(__func__, xdr);
3384         return -EIO;
3385 }
3386
3387 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3388 {
3389         __be32 *p;
3390         int status = 0;
3391
3392         *res = 1024;
3393         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3394                 return -EIO;
3395         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3396                 uint64_t maxwrite;
3397                 p = xdr_inline_decode(xdr, 8);
3398                 if (unlikely(!p))
3399                         goto out_overflow;
3400                 xdr_decode_hyper(p, &maxwrite);
3401                 if (maxwrite > 0x7FFFFFFF)
3402                         maxwrite = 0x7FFFFFFF;
3403                 *res = (uint32_t)maxwrite;
3404                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3405         }
3406         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3407         return status;
3408 out_overflow:
3409         print_overflow_msg(__func__, xdr);
3410         return -EIO;
3411 }
3412
3413 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3414 {
3415         uint32_t tmp;
3416         __be32 *p;
3417         int ret = 0;
3418
3419         *mode = 0;
3420         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3421                 return -EIO;
3422         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3423                 p = xdr_inline_decode(xdr, 4);
3424                 if (unlikely(!p))
3425                         goto out_overflow;
3426                 tmp = be32_to_cpup(p);
3427                 *mode = tmp & ~S_IFMT;
3428                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3429                 ret = NFS_ATTR_FATTR_MODE;
3430         }
3431         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3432         return ret;
3433 out_overflow:
3434         print_overflow_msg(__func__, xdr);
3435         return -EIO;
3436 }
3437
3438 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3439 {
3440         __be32 *p;
3441         int ret = 0;
3442
3443         *nlink = 1;
3444         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3445                 return -EIO;
3446         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3447                 p = xdr_inline_decode(xdr, 4);
3448                 if (unlikely(!p))
3449                         goto out_overflow;
3450                 *nlink = be32_to_cpup(p);
3451                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3452                 ret = NFS_ATTR_FATTR_NLINK;
3453         }
3454         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3455         return ret;
3456 out_overflow:
3457         print_overflow_msg(__func__, xdr);
3458         return -EIO;
3459 }
3460
3461 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3462                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3463 {
3464         uint32_t len;
3465         __be32 *p;
3466         int ret = 0;
3467
3468         *uid = -2;
3469         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3470                 return -EIO;
3471         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3472                 p = xdr_inline_decode(xdr, 4);
3473                 if (unlikely(!p))
3474                         goto out_overflow;
3475                 len = be32_to_cpup(p);
3476                 p = xdr_inline_decode(xdr, len);
3477                 if (unlikely(!p))
3478                         goto out_overflow;
3479                 if (!may_sleep) {
3480                         /* do nothing */
3481                 } else if (len < XDR_MAX_NETOBJ) {
3482                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3483                                 ret = NFS_ATTR_FATTR_OWNER;
3484                         else
3485                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3486                                                 __func__);
3487                 } else
3488                         dprintk("%s: name too long (%u)!\n",
3489                                         __func__, len);
3490                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3491         }
3492         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3493         return ret;
3494 out_overflow:
3495         print_overflow_msg(__func__, xdr);
3496         return -EIO;
3497 }
3498
3499 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3500                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3501 {
3502         uint32_t len;
3503         __be32 *p;
3504         int ret = 0;
3505
3506         *gid = -2;
3507         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3508                 return -EIO;
3509         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3510                 p = xdr_inline_decode(xdr, 4);
3511                 if (unlikely(!p))
3512                         goto out_overflow;
3513                 len = be32_to_cpup(p);
3514                 p = xdr_inline_decode(xdr, len);
3515                 if (unlikely(!p))
3516                         goto out_overflow;
3517                 if (!may_sleep) {
3518                         /* do nothing */
3519                 } else if (len < XDR_MAX_NETOBJ) {
3520                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3521                                 ret = NFS_ATTR_FATTR_GROUP;
3522                         else
3523                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3524                                                 __func__);
3525                 } else
3526                         dprintk("%s: name too long (%u)!\n",
3527                                         __func__, len);
3528                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3529         }
3530         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3531         return ret;
3532 out_overflow:
3533         print_overflow_msg(__func__, xdr);
3534         return -EIO;
3535 }
3536
3537 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3538 {
3539         uint32_t major = 0, minor = 0;
3540         __be32 *p;
3541         int ret = 0;
3542
3543         *rdev = MKDEV(0,0);
3544         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3545                 return -EIO;
3546         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3547                 dev_t tmp;
3548
3549                 p = xdr_inline_decode(xdr, 8);
3550                 if (unlikely(!p))
3551                         goto out_overflow;
3552                 major = be32_to_cpup(p++);
3553                 minor = be32_to_cpup(p);
3554                 tmp = MKDEV(major, minor);
3555                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3556                         *rdev = tmp;
3557                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3558                 ret = NFS_ATTR_FATTR_RDEV;
3559         }
3560         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3561         return ret;
3562 out_overflow:
3563         print_overflow_msg(__func__, xdr);
3564         return -EIO;
3565 }
3566
3567 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3568 {
3569         __be32 *p;
3570         int status = 0;
3571
3572         *res = 0;
3573         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3574                 return -EIO;
3575         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3576                 p = xdr_inline_decode(xdr, 8);
3577                 if (unlikely(!p))
3578                         goto out_overflow;
3579                 xdr_decode_hyper(p, res);
3580                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3581         }
3582         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3583         return status;
3584 out_overflow:
3585         print_overflow_msg(__func__, xdr);
3586         return -EIO;
3587 }
3588
3589 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3590 {
3591         __be32 *p;
3592         int status = 0;
3593
3594         *res = 0;
3595         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3596                 return -EIO;
3597         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3598                 p = xdr_inline_decode(xdr, 8);
3599                 if (unlikely(!p))
3600                         goto out_overflow;
3601                 xdr_decode_hyper(p, res);
3602                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3603         }
3604         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3605         return status;
3606 out_overflow:
3607         print_overflow_msg(__func__, xdr);
3608         return -EIO;
3609 }
3610
3611 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3612 {
3613         __be32 *p;
3614         int status = 0;
3615
3616         *res = 0;
3617         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3618                 return -EIO;
3619         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3620                 p = xdr_inline_decode(xdr, 8);
3621                 if (unlikely(!p))
3622                         goto out_overflow;
3623                 xdr_decode_hyper(p, res);
3624                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3625         }
3626         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3627         return status;
3628 out_overflow:
3629         print_overflow_msg(__func__, xdr);
3630         return -EIO;
3631 }
3632
3633 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3634 {
3635         __be32 *p;
3636         int ret = 0;
3637
3638         *used = 0;
3639         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3640                 return -EIO;
3641         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3642                 p = xdr_inline_decode(xdr, 8);
3643                 if (unlikely(!p))
3644                         goto out_overflow;
3645                 xdr_decode_hyper(p, used);
3646                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3647                 ret = NFS_ATTR_FATTR_SPACE_USED;
3648         }
3649         dprintk("%s: space used=%Lu\n", __func__,
3650                         (unsigned long long)*used);
3651         return ret;
3652 out_overflow:
3653         print_overflow_msg(__func__, xdr);
3654         return -EIO;
3655 }
3656
3657 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3658 {
3659         __be32 *p;
3660         uint64_t sec;
3661         uint32_t nsec;
3662
3663         p = xdr_inline_decode(xdr, 12);
3664         if (unlikely(!p))
3665                 goto out_overflow;
3666         p = xdr_decode_hyper(p, &sec);
3667         nsec = be32_to_cpup(p);
3668         time->tv_sec = (time_t)sec;
3669         time->tv_nsec = (long)nsec;
3670         return 0;
3671 out_overflow:
3672         print_overflow_msg(__func__, xdr);
3673         return -EIO;
3674 }
3675
3676 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3677 {
3678         int status = 0;
3679
3680         time->tv_sec = 0;
3681         time->tv_nsec = 0;
3682         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3683                 return -EIO;
3684         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3685                 status = decode_attr_time(xdr, time);
3686                 if (status == 0)
3687                         status = NFS_ATTR_FATTR_ATIME;
3688                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3689         }
3690         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3691         return status;
3692 }
3693
3694 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3695 {
3696         int status = 0;
3697
3698         time->tv_sec = 0;
3699         time->tv_nsec = 0;
3700         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3701                 return -EIO;
3702         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3703                 status = decode_attr_time(xdr, time);
3704                 if (status == 0)
3705                         status = NFS_ATTR_FATTR_CTIME;
3706                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3707         }
3708         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3709         return status;
3710 }
3711
3712 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3713                                   struct timespec *time)
3714 {
3715         int status = 0;
3716
3717         time->tv_sec = 0;
3718         time->tv_nsec = 0;
3719         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3720                 return -EIO;
3721         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3722                 status = decode_attr_time(xdr, time);
3723                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3724         }
3725         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3726                 (long)time->tv_nsec);
3727         return status;
3728 }
3729
3730 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3731 {
3732         int status = 0;
3733
3734         time->tv_sec = 0;
3735         time->tv_nsec = 0;
3736         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3737                 return -EIO;
3738         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3739                 status = decode_attr_time(xdr, time);
3740                 if (status == 0)
3741                         status = NFS_ATTR_FATTR_MTIME;
3742                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3743         }
3744         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3745         return status;
3746 }
3747
3748 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3749 {
3750         unsigned int attrwords = XDR_QUADLEN(attrlen);
3751         unsigned int nwords = xdr->p - savep;
3752
3753         if (unlikely(attrwords != nwords)) {
3754                 dprintk("%s: server returned incorrect attribute length: "
3755                         "%u %c %u\n",
3756                                 __func__,
3757                                 attrwords << 2,
3758                                 (attrwords < nwords) ? '<' : '>',
3759                                 nwords << 2);
3760                 return -EIO;
3761         }
3762         return 0;
3763 }
3764
3765 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3766 {
3767         __be32 *p;
3768
3769         p = xdr_inline_decode(xdr, 20);
3770         if (unlikely(!p))
3771                 goto out_overflow;
3772         cinfo->atomic = be32_to_cpup(p++);
3773         p = xdr_decode_hyper(p, &cinfo->before);
3774         xdr_decode_hyper(p, &cinfo->after);
3775         return 0;
3776 out_overflow:
3777         print_overflow_msg(__func__, xdr);
3778         return -EIO;
3779 }
3780
3781 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3782 {
3783         __be32 *p;
3784         uint32_t supp, acc;
3785         int status;
3786
3787         status = decode_op_hdr(xdr, OP_ACCESS);
3788         if (status)
3789                 return status;
3790         p = xdr_inline_decode(xdr, 8);
3791         if (unlikely(!p))
3792                 goto out_overflow;
3793         supp = be32_to_cpup(p++);
3794         acc = be32_to_cpup(p);
3795         access->supported = supp;
3796         access->access = acc;
3797         return 0;
3798 out_overflow:
3799         print_overflow_msg(__func__, xdr);
3800         return -EIO;
3801 }
3802
3803 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3804 {
3805         __be32 *p;
3806
3807         p = xdr_inline_decode(xdr, len);
3808         if (likely(p)) {
3809                 memcpy(buf, p, len);
3810                 return 0;
3811         }
3812         print_overflow_msg(__func__, xdr);
3813         return -EIO;
3814 }
3815
3816 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3817 {
3818         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3819 }
3820
3821 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3822 {
3823         int status;
3824
3825         status = decode_op_hdr(xdr, OP_CLOSE);
3826         if (status != -EIO)
3827                 nfs_increment_open_seqid(status, res->seqid);
3828         if (!status)
3829                 status = decode_stateid(xdr, &res->stateid);
3830         return status;
3831 }
3832
3833 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3834 {
3835         return decode_opaque_fixed(xdr, verifier, 8);
3836 }
3837
3838 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3839 {
3840         int status;
3841
3842         status = decode_op_hdr(xdr, OP_COMMIT);
3843         if (!status)
3844                 status = decode_verifier(xdr, res->verf->verifier);
3845         return status;
3846 }
3847
3848 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3849 {
3850         __be32 *p;
3851         uint32_t bmlen;
3852         int status;
3853
3854         status = decode_op_hdr(xdr, OP_CREATE);
3855         if (status)
3856                 return status;
3857         if ((status = decode_change_info(xdr, cinfo)))
3858                 return status;
3859         p = xdr_inline_decode(xdr, 4);
3860         if (unlikely(!p))
3861                 goto out_overflow;
3862         bmlen = be32_to_cpup(p);
3863         p = xdr_inline_decode(xdr, bmlen << 2);
3864         if (likely(p))
3865                 return 0;
3866 out_overflow:
3867         print_overflow_msg(__func__, xdr);
3868         return -EIO;
3869 }
3870
3871 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3872 {
3873         __be32 *savep;
3874         uint32_t attrlen, bitmap[2] = {0};
3875         int status;
3876
3877         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3878                 goto xdr_error;
3879         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3880                 goto xdr_error;
3881         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3882                 goto xdr_error;
3883         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3884                 goto xdr_error;
3885         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3886                 goto xdr_error;
3887         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3888                 goto xdr_error;
3889         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3890                 goto xdr_error;
3891         status = verify_attr_len(xdr, savep, attrlen);
3892 xdr_error:
3893         dprintk("%s: xdr returned %d!\n", __func__, -status);
3894         return status;
3895 }
3896
3897 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3898 {
3899         __be32 *savep;
3900         uint32_t attrlen, bitmap[2] = {0};
3901         int status;
3902
3903         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3904                 goto xdr_error;
3905         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3906                 goto xdr_error;
3907         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3908                 goto xdr_error;
3909
3910         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3911                 goto xdr_error;
3912         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3913                 goto xdr_error;
3914         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3915                 goto xdr_error;
3916         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3917                 goto xdr_error;
3918         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3919                 goto xdr_error;
3920         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3921                 goto xdr_error;
3922
3923         status = verify_attr_len(xdr, savep, attrlen);
3924 xdr_error:
3925         dprintk("%s: xdr returned %d!\n", __func__, -status);
3926         return status;
3927 }
3928
3929 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3930 {
3931         __be32 *savep;
3932         uint32_t attrlen, bitmap[2] = {0};
3933         int status;
3934
3935         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3936                 goto xdr_error;
3937         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3938                 goto xdr_error;
3939         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3940                 goto xdr_error;
3941
3942         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3943                 goto xdr_error;
3944         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3945                 goto xdr_error;
3946
3947         status = verify_attr_len(xdr, savep, attrlen);
3948 xdr_error:
3949         dprintk("%s: xdr returned %d!\n", __func__, -status);
3950         return status;
3951 }
3952
3953 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3954                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3955                 const struct nfs_server *server, int may_sleep)
3956 {
3957         int status;
3958         umode_t fmode = 0;
3959         uint64_t fileid;
3960         uint32_t type;
3961
3962         status = decode_attr_type(xdr, bitmap, &type);
3963         if (status < 0)
3964                 goto xdr_error;
3965         fattr->mode = 0;
3966         if (status != 0) {
3967                 fattr->mode |= nfs_type2fmt[type];
3968                 fattr->valid |= status;
3969         }
3970
3971         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3972         if (status < 0)
3973                 goto xdr_error;
3974         fattr->valid |= status;
3975
3976         status = decode_attr_size(xdr, bitmap, &fattr->size);
3977         if (status < 0)
3978                 goto xdr_error;
3979         fattr->valid |= status;
3980
3981         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3982         if (status < 0)
3983                 goto xdr_error;
3984         fattr->valid |= status;
3985
3986         status = decode_attr_error(xdr, bitmap);
3987         if (status < 0)
3988                 goto xdr_error;
3989
3990         status = decode_attr_filehandle(xdr, bitmap, fh);
3991         if (status < 0)
3992                 goto xdr_error;
3993
3994         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3995         if (status < 0)
3996                 goto xdr_error;
3997         fattr->valid |= status;
3998
3999         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4000                                                 struct nfs4_fs_locations,
4001                                                 fattr));
4002         if (status < 0)
4003                 goto xdr_error;
4004         fattr->valid |= status;
4005
4006         status = decode_attr_mode(xdr, bitmap, &fmode);
4007         if (status < 0)
4008                 goto xdr_error;
4009         if (status != 0) {
4010                 fattr->mode |= fmode;
4011                 fattr->valid |= status;
4012         }
4013
4014         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4015         if (status < 0)
4016                 goto xdr_error;
4017         fattr->valid |= status;
4018
4019         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4020         if (status < 0)
4021                 goto xdr_error;
4022         fattr->valid |= status;
4023
4024         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4025         if (status < 0)
4026                 goto xdr_error;
4027         fattr->valid |= status;
4028
4029         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4030         if (status < 0)
4031                 goto xdr_error;
4032         fattr->valid |= status;
4033
4034         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4035         if (status < 0)
4036                 goto xdr_error;
4037         fattr->valid |= status;
4038
4039         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4040         if (status < 0)
4041                 goto xdr_error;
4042         fattr->valid |= status;
4043
4044         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4045         if (status < 0)
4046                 goto xdr_error;
4047         fattr->valid |= status;
4048
4049         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4050         if (status < 0)
4051                 goto xdr_error;
4052         fattr->valid |= status;
4053
4054         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
4055         if (status < 0)
4056                 goto xdr_error;
4057         if (status != 0 && !(fattr->valid & status)) {
4058                 fattr->fileid = fileid;
4059                 fattr->valid |= status;
4060         }
4061
4062 xdr_error:
4063         dprintk("%s: xdr returned %d\n", __func__, -status);
4064         return status;
4065 }
4066
4067 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4068                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4069 {
4070         __be32 *savep;
4071         uint32_t attrlen,
4072                  bitmap[2] = {0};
4073         int status;
4074
4075         status = decode_op_hdr(xdr, OP_GETATTR);
4076         if (status < 0)
4077                 goto xdr_error;
4078
4079         status = decode_attr_bitmap(xdr, bitmap);
4080         if (status < 0)
4081                 goto xdr_error;
4082
4083         status = decode_attr_length(xdr, &attrlen, &savep);
4084         if (status < 0)
4085                 goto xdr_error;
4086
4087         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4088         if (status < 0)
4089                 goto xdr_error;
4090
4091         status = verify_attr_len(xdr, savep, attrlen);
4092 xdr_error:
4093         dprintk("%s: xdr returned %d\n", __func__, -status);
4094         return status;
4095 }
4096
4097 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4098                 const struct nfs_server *server, int may_sleep)
4099 {
4100         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4101 }
4102
4103 /*
4104  * Decode potentially multiple layout types. Currently we only support
4105  * one layout driver per file system.
4106  */
4107 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4108                                          uint32_t *layouttype)
4109 {
4110         uint32_t *p;
4111         int num;
4112
4113         p = xdr_inline_decode(xdr, 4);
4114         if (unlikely(!p))
4115                 goto out_overflow;
4116         num = be32_to_cpup(p);
4117
4118         /* pNFS is not supported by the underlying file system */
4119         if (num == 0) {
4120                 *layouttype = 0;
4121                 return 0;
4122         }
4123         if (num > 1)
4124                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4125                         "per filesystem not supported\n", __func__);
4126
4127         /* Decode and set first layout type, move xdr->p past unused types */
4128         p = xdr_inline_decode(xdr, num * 4);
4129         if (unlikely(!p))
4130                 goto out_overflow;
4131         *layouttype = be32_to_cpup(p);
4132         return 0;
4133 out_overflow:
4134         print_overflow_msg(__func__, xdr);
4135         return -EIO;
4136 }
4137
4138 /*
4139  * The type of file system exported.
4140  * Note we must ensure that layouttype is set in any non-error case.
4141  */
4142 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4143                                 uint32_t *layouttype)
4144 {
4145         int status = 0;
4146
4147         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4148         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4149                 return -EIO;
4150         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4151                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4152                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4153         } else
4154                 *layouttype = 0;
4155         return status;
4156 }
4157
4158 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4159 {
4160         __be32 *savep;
4161         uint32_t attrlen, bitmap[2];
4162         int status;
4163
4164         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4165                 goto xdr_error;
4166         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4167                 goto xdr_error;
4168         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4169                 goto xdr_error;
4170
4171         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4172
4173         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4174                 goto xdr_error;
4175         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4176                 goto xdr_error;
4177         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4178                 goto xdr_error;
4179         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4180         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4181                 goto xdr_error;
4182         fsinfo->wtpref = fsinfo->wtmax;
4183         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4184         if (status != 0)
4185                 goto xdr_error;
4186         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4187         if (status != 0)
4188                 goto xdr_error;
4189
4190         status = verify_attr_len(xdr, savep, attrlen);
4191 xdr_error:
4192         dprintk("%s: xdr returned %d!\n", __func__, -status);
4193         return status;
4194 }
4195
4196 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4197 {
4198         __be32 *p;
4199         uint32_t len;
4200         int status;
4201
4202         /* Zero handle first to allow comparisons */
4203         memset(fh, 0, sizeof(*fh));
4204
4205         status = decode_op_hdr(xdr, OP_GETFH);
4206         if (status)
4207                 return status;
4208
4209         p = xdr_inline_decode(xdr, 4);
4210         if (unlikely(!p))
4211                 goto out_overflow;
4212         len = be32_to_cpup(p);
4213         if (len > NFS4_FHSIZE)
4214                 return -EIO;
4215         fh->size = len;
4216         p = xdr_inline_decode(xdr, len);
4217         if (unlikely(!p))
4218                 goto out_overflow;
4219         memcpy(fh->data, p, len);
4220         return 0;
4221 out_overflow:
4222         print_overflow_msg(__func__, xdr);
4223         return -EIO;
4224 }
4225
4226 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4227 {
4228         int status;
4229
4230         status = decode_op_hdr(xdr, OP_LINK);
4231         if (status)
4232                 return status;
4233         return decode_change_info(xdr, cinfo);
4234 }
4235
4236 /*
4237  * We create the owner, so we know a proper owner.id length is 4.
4238  */
4239 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4240 {
4241         uint64_t offset, length, clientid;
4242         __be32 *p;
4243         uint32_t namelen, type;
4244
4245         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4246         if (unlikely(!p))
4247                 goto out_overflow;
4248         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4249         p = xdr_decode_hyper(p, &length);
4250         type = be32_to_cpup(p++); /* 4 byte read */
4251         if (fl != NULL) { /* manipulate file lock */
4252                 fl->fl_start = (loff_t)offset;
4253                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4254                 if (length == ~(uint64_t)0)
4255                         fl->fl_end = OFFSET_MAX;
4256                 fl->fl_type = F_WRLCK;
4257                 if (type & 1)
4258                         fl->fl_type = F_RDLCK;
4259                 fl->fl_pid = 0;
4260         }
4261         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4262         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4263         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4264         if (likely(p))
4265                 return -NFS4ERR_DENIED;
4266 out_overflow:
4267         print_overflow_msg(__func__, xdr);
4268         return -EIO;
4269 }
4270
4271 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4272 {
4273         int status;
4274
4275         status = decode_op_hdr(xdr, OP_LOCK);
4276         if (status == -EIO)
4277                 goto out;
4278         if (status == 0) {
4279                 status = decode_stateid(xdr, &res->stateid);
4280                 if (unlikely(status))
4281                         goto out;
4282         } else if (status == -NFS4ERR_DENIED)
4283                 status = decode_lock_denied(xdr, NULL);
4284         if (res->open_seqid != NULL)
4285                 nfs_increment_open_seqid(status, res->open_seqid);
4286         nfs_increment_lock_seqid(status, res->lock_seqid);
4287 out:
4288         return status;
4289 }
4290
4291 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4292 {
4293         int status;
4294         status = decode_op_hdr(xdr, OP_LOCKT);
4295         if (status == -NFS4ERR_DENIED)
4296                 return decode_lock_denied(xdr, res->denied);
4297         return status;
4298 }
4299
4300 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4301 {
4302         int status;
4303
4304         status = decode_op_hdr(xdr, OP_LOCKU);
4305         if (status != -EIO)
4306                 nfs_increment_lock_seqid(status, res->seqid);
4307         if (status == 0)
4308                 status = decode_stateid(xdr, &res->stateid);
4309         return status;
4310 }
4311
4312 static int decode_release_lockowner(struct xdr_stream *xdr)
4313 {
4314         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4315 }
4316
4317 static int decode_lookup(struct xdr_stream *xdr)
4318 {
4319         return decode_op_hdr(xdr, OP_LOOKUP);
4320 }
4321
4322 /* This is too sick! */
4323 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4324 {
4325         __be32 *p;
4326         uint32_t limit_type, nblocks, blocksize;
4327
4328         p = xdr_inline_decode(xdr, 12);
4329         if (unlikely(!p))
4330                 goto out_overflow;
4331         limit_type = be32_to_cpup(p++);
4332         switch (limit_type) {
4333         case 1:
4334                 xdr_decode_hyper(p, maxsize);
4335                 break;
4336         case 2:
4337                 nblocks = be32_to_cpup(p++);
4338                 blocksize = be32_to_cpup(p);
4339                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4340         }
4341         return 0;
4342 out_overflow:
4343         print_overflow_msg(__func__, xdr);
4344         return -EIO;
4345 }
4346
4347 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4348 {
4349         __be32 *p;
4350         uint32_t delegation_type;
4351         int status;
4352
4353         p = xdr_inline_decode(xdr, 4);
4354         if (unlikely(!p))
4355                 goto out_overflow;
4356         delegation_type = be32_to_cpup(p);
4357         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4358                 res->delegation_type = 0;
4359                 return 0;
4360         }
4361         status = decode_stateid(xdr, &res->delegation);
4362         if (unlikely(status))
4363                 return status;
4364         p = xdr_inline_decode(xdr, 4);
4365         if (unlikely(!p))
4366                 goto out_overflow;
4367         res->do_recall = be32_to_cpup(p);
4368
4369         switch (delegation_type) {
4370         case NFS4_OPEN_DELEGATE_READ:
4371                 res->delegation_type = FMODE_READ;
4372                 break;
4373         case NFS4_OPEN_DELEGATE_WRITE:
4374                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4375                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4376                                 return -EIO;
4377         }
4378         return decode_ace(xdr, NULL, res->server->nfs_client);
4379 out_overflow:
4380         print_overflow_msg(__func__, xdr);
4381         return -EIO;
4382 }
4383
4384 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4385 {
4386         __be32 *p;
4387         uint32_t savewords, bmlen, i;
4388         int status;
4389
4390         status = decode_op_hdr(xdr, OP_OPEN);
4391         if (status != -EIO)
4392                 nfs_increment_open_seqid(status, res->seqid);
4393         if (!status)
4394                 status = decode_stateid(xdr, &res->stateid);
4395         if (unlikely(status))
4396                 return status;
4397
4398         decode_change_info(xdr, &res->cinfo);
4399
4400         p = xdr_inline_decode(xdr, 8);
4401         if (unlikely(!p))
4402                 goto out_overflow;
4403         res->rflags = be32_to_cpup(p++);
4404         bmlen = be32_to_cpup(p);
4405         if (bmlen > 10)
4406                 goto xdr_error;
4407
4408         p = xdr_inline_decode(xdr, bmlen << 2);
4409         if (unlikely(!p))
4410                 goto out_overflow;
4411         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4412         for (i = 0; i < savewords; ++i)
4413                 res->attrset[i] = be32_to_cpup(p++);
4414         for (; i < NFS4_BITMAP_SIZE; i++)
4415                 res->attrset[i] = 0;
4416
4417         return decode_delegation(xdr, res);
4418 xdr_error:
4419         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4420         return -EIO;
4421 out_overflow:
4422         print_overflow_msg(__func__, xdr);
4423         return -EIO;
4424 }
4425
4426 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4427 {
4428         int status;
4429
4430         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4431         if (status != -EIO)
4432                 nfs_increment_open_seqid(status, res->seqid);
4433         if (!status)
4434                 status = decode_stateid(xdr, &res->stateid);
4435         return status;
4436 }
4437
4438 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4439 {
4440         int status;
4441
4442         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4443         if (status != -EIO)
4444                 nfs_increment_open_seqid(status, res->seqid);
4445         if (!status)
4446                 status = decode_stateid(xdr, &res->stateid);
4447         return status;
4448 }
4449
4450 static int decode_putfh(struct xdr_stream *xdr)
4451 {
4452         return decode_op_hdr(xdr, OP_PUTFH);
4453 }
4454
4455 static int decode_putrootfh(struct xdr_stream *xdr)
4456 {
4457         return decode_op_hdr(xdr, OP_PUTROOTFH);
4458 }
4459
4460 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4461 {
4462         struct kvec *iov = req->rq_rcv_buf.head;
4463         __be32 *p;
4464         uint32_t count, eof, recvd, hdrlen;
4465         int status;
4466
4467         status = decode_op_hdr(xdr, OP_READ);
4468         if (status)
4469                 return status;
4470         p = xdr_inline_decode(xdr, 8);
4471         if (unlikely(!p))
4472                 goto out_overflow;
4473         eof = be32_to_cpup(p++);
4474         count = be32_to_cpup(p);
4475         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4476         recvd = req->rq_rcv_buf.len - hdrlen;
4477         if (count > recvd) {
4478                 dprintk("NFS: server cheating in read reply: "
4479                                 "count %u > recvd %u\n", count, recvd);
4480                 count = recvd;
4481                 eof = 0;
4482         }
4483         xdr_read_pages(xdr, count);
4484         res->eof = eof;
4485         res->count = count;
4486         return 0;
4487 out_overflow:
4488         print_overflow_msg(__func__, xdr);
4489         return -EIO;
4490 }
4491
4492 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4493 {
4494         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4495         struct kvec     *iov = rcvbuf->head;
4496         size_t          hdrlen;
4497         u32             recvd, pglen = rcvbuf->page_len;
4498         int             status;
4499
4500         status = decode_op_hdr(xdr, OP_READDIR);
4501         if (!status)
4502                 status = decode_verifier(xdr, readdir->verifier.data);
4503         if (unlikely(status))
4504                 return status;
4505         dprintk("%s: verifier = %08x:%08x\n",
4506                         __func__,
4507                         ((u32 *)readdir->verifier.data)[0],
4508                         ((u32 *)readdir->verifier.data)[1]);
4509
4510
4511         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4512         recvd = rcvbuf->len - hdrlen;
4513         if (pglen > recvd)
4514                 pglen = recvd;
4515         xdr_read_pages(xdr, pglen);
4516
4517
4518         return pglen;
4519 }
4520
4521 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4522 {
4523         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4524         struct kvec *iov = rcvbuf->head;
4525         size_t hdrlen;
4526         u32 len, recvd;
4527         __be32 *p;
4528         int status;
4529
4530         status = decode_op_hdr(xdr, OP_READLINK);
4531         if (status)
4532                 return status;
4533
4534         /* Convert length of symlink */
4535         p = xdr_inline_decode(xdr, 4);
4536         if (unlikely(!p))
4537                 goto out_overflow;
4538         len = be32_to_cpup(p);
4539         if (len >= rcvbuf->page_len || len <= 0) {
4540                 dprintk("nfs: server returned giant symlink!\n");
4541                 return -ENAMETOOLONG;
4542         }
4543         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4544         recvd = req->rq_rcv_buf.len - hdrlen;
4545         if (recvd < len) {
4546                 dprintk("NFS: server cheating in readlink reply: "
4547                                 "count %u > recvd %u\n", len, recvd);
4548                 return -EIO;
4549         }
4550         xdr_read_pages(xdr, len);
4551         /*
4552          * The XDR encode routine has set things up so that
4553          * the link text will be copied directly into the
4554          * buffer.  We just have to do overflow-checking,
4555          * and and null-terminate the text (the VFS expects
4556          * null-termination).
4557          */
4558         xdr_terminate_string(rcvbuf, len);
4559         return 0;
4560 out_overflow:
4561         print_overflow_msg(__func__, xdr);
4562         return -EIO;
4563 }
4564
4565 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4566 {
4567         int status;
4568
4569         status = decode_op_hdr(xdr, OP_REMOVE);
4570         if (status)
4571                 goto out;
4572         status = decode_change_info(xdr, cinfo);
4573 out:
4574         return status;
4575 }
4576
4577 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4578               struct nfs4_change_info *new_cinfo)
4579 {
4580         int status;
4581
4582         status = decode_op_hdr(xdr, OP_RENAME);
4583         if (status)
4584                 goto out;
4585         if ((status = decode_change_info(xdr, old_cinfo)))
4586                 goto out;
4587         status = decode_change_info(xdr, new_cinfo);
4588 out:
4589         return status;
4590 }
4591
4592 static int decode_renew(struct xdr_stream *xdr)
4593 {
4594         return decode_op_hdr(xdr, OP_RENEW);
4595 }
4596
4597 static int
4598 decode_restorefh(struct xdr_stream *xdr)
4599 {
4600         return decode_op_hdr(xdr, OP_RESTOREFH);
4601 }
4602
4603 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4604                 size_t *acl_len)
4605 {
4606         __be32 *savep;
4607         uint32_t attrlen,
4608                  bitmap[2] = {0};
4609         struct kvec *iov = req->rq_rcv_buf.head;
4610         int status;
4611
4612         *acl_len = 0;
4613         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4614                 goto out;
4615         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4616                 goto out;
4617         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4618                 goto out;
4619
4620         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4621                 return -EIO;
4622         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4623                 size_t hdrlen;
4624                 u32 recvd;
4625
4626                 /* We ignore &savep and don't do consistency checks on
4627                  * the attr length.  Let userspace figure it out.... */
4628                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4629                 recvd = req->rq_rcv_buf.len - hdrlen;
4630                 if (attrlen > recvd) {
4631                         dprintk("NFS: server cheating in getattr"
4632                                         " acl reply: attrlen %u > recvd %u\n",
4633                                         attrlen, recvd);
4634                         return -EINVAL;
4635                 }
4636                 xdr_read_pages(xdr, attrlen);
4637                 *acl_len = attrlen;
4638         } else
4639                 status = -EOPNOTSUPP;
4640
4641 out:
4642         return status;
4643 }
4644
4645 static int
4646 decode_savefh(struct xdr_stream *xdr)
4647 {
4648         return decode_op_hdr(xdr, OP_SAVEFH);
4649 }
4650
4651 static int decode_setattr(struct xdr_stream *xdr)
4652 {
4653         __be32 *p;
4654         uint32_t bmlen;
4655         int status;
4656
4657         status = decode_op_hdr(xdr, OP_SETATTR);
4658         if (status)
4659                 return status;
4660         p = xdr_inline_decode(xdr, 4);
4661         if (unlikely(!p))
4662                 goto out_overflow;
4663         bmlen = be32_to_cpup(p);
4664         p = xdr_inline_decode(xdr, bmlen << 2);
4665         if (likely(p))
4666                 return 0;
4667 out_overflow:
4668         print_overflow_msg(__func__, xdr);
4669         return -EIO;
4670 }
4671
4672 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4673 {
4674         __be32 *p;
4675         uint32_t opnum;
4676         int32_t nfserr;
4677
4678         p = xdr_inline_decode(xdr, 8);
4679         if (unlikely(!p))
4680                 goto out_overflow;
4681         opnum = be32_to_cpup(p++);
4682         if (opnum != OP_SETCLIENTID) {
4683                 dprintk("nfs: decode_setclientid: Server returned operation"
4684                         " %d\n", opnum);
4685                 return -EIO;
4686         }
4687         nfserr = be32_to_cpup(p);
4688         if (nfserr == NFS_OK) {
4689                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4690                 if (unlikely(!p))
4691                         goto out_overflow;
4692                 p = xdr_decode_hyper(p, &res->clientid);
4693                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4694         } else if (nfserr == NFSERR_CLID_INUSE) {
4695                 uint32_t len;
4696
4697                 /* skip netid string */
4698                 p = xdr_inline_decode(xdr, 4);
4699                 if (unlikely(!p))
4700                         goto out_overflow;
4701                 len = be32_to_cpup(p);
4702                 p = xdr_inline_decode(xdr, len);
4703                 if (unlikely(!p))
4704                         goto out_overflow;
4705
4706                 /* skip uaddr string */
4707                 p = xdr_inline_decode(xdr, 4);
4708                 if (unlikely(!p))
4709                         goto out_overflow;
4710                 len = be32_to_cpup(p);
4711                 p = xdr_inline_decode(xdr, len);
4712                 if (unlikely(!p))
4713                         goto out_overflow;
4714                 return -NFSERR_CLID_INUSE;
4715         } else
4716                 return nfs4_stat_to_errno(nfserr);
4717
4718         return 0;
4719 out_overflow:
4720         print_overflow_msg(__func__, xdr);
4721         return -EIO;
4722 }
4723
4724 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4725 {
4726         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4727 }
4728
4729 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4730 {
4731         __be32 *p;
4732         int status;
4733
4734         status = decode_op_hdr(xdr, OP_WRITE);
4735         if (status)
4736                 return status;
4737
4738         p = xdr_inline_decode(xdr, 16);
4739         if (unlikely(!p))
4740                 goto out_overflow;
4741         res->count = be32_to_cpup(p++);
4742         res->verf->committed = be32_to_cpup(p++);
4743         memcpy(res->verf->verifier, p, 8);
4744         return 0;
4745 out_overflow:
4746         print_overflow_msg(__func__, xdr);
4747         return -EIO;
4748 }
4749
4750 static int decode_delegreturn(struct xdr_stream *xdr)
4751 {
4752         return decode_op_hdr(xdr, OP_DELEGRETURN);
4753 }
4754
4755 #if defined(CONFIG_NFS_V4_1)
4756 static int decode_exchange_id(struct xdr_stream *xdr,
4757                               struct nfs41_exchange_id_res *res)
4758 {
4759         __be32 *p;
4760         uint32_t dummy;
4761         char *dummy_str;
4762         int status;
4763         struct nfs_client *clp = res->client;
4764
4765         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4766         if (status)
4767                 return status;
4768
4769         p = xdr_inline_decode(xdr, 8);
4770         if (unlikely(!p))
4771                 goto out_overflow;
4772         xdr_decode_hyper(p, &clp->cl_clientid);
4773         p = xdr_inline_decode(xdr, 12);
4774         if (unlikely(!p))
4775                 goto out_overflow;
4776         clp->cl_seqid = be32_to_cpup(p++);
4777         clp->cl_exchange_flags = be32_to_cpup(p++);
4778
4779         /* We ask for SP4_NONE */
4780         dummy = be32_to_cpup(p);
4781         if (dummy != SP4_NONE)
4782                 return -EIO;
4783
4784         /* Throw away minor_id */
4785         p = xdr_inline_decode(xdr, 8);
4786         if (unlikely(!p))
4787                 goto out_overflow;
4788
4789         /* Throw away Major id */
4790         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4791         if (unlikely(status))
4792                 return status;
4793
4794         /* Throw away server_scope */
4795         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4796         if (unlikely(status))
4797                 return status;
4798
4799         /* Throw away Implementation id array */
4800         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4801         if (unlikely(status))
4802                 return status;
4803
4804         return 0;
4805 out_overflow:
4806         print_overflow_msg(__func__, xdr);
4807         return -EIO;
4808 }
4809
4810 static int decode_chan_attrs(struct xdr_stream *xdr,
4811                              struct nfs4_channel_attrs *attrs)
4812 {
4813         __be32 *p;
4814         u32 nr_attrs;
4815
4816         p = xdr_inline_decode(xdr, 28);
4817         if (unlikely(!p))
4818                 goto out_overflow;
4819         attrs->headerpadsz = be32_to_cpup(p++);
4820         attrs->max_rqst_sz = be32_to_cpup(p++);
4821         attrs->max_resp_sz = be32_to_cpup(p++);
4822         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4823         attrs->max_ops = be32_to_cpup(p++);
4824         attrs->max_reqs = be32_to_cpup(p++);
4825         nr_attrs = be32_to_cpup(p);
4826         if (unlikely(nr_attrs > 1)) {
4827                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4828                         __func__, nr_attrs);
4829                 return -EINVAL;
4830         }
4831         if (nr_attrs == 1) {
4832                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4833                 if (unlikely(!p))
4834                         goto out_overflow;
4835         }
4836         return 0;
4837 out_overflow:
4838         print_overflow_msg(__func__, xdr);
4839         return -EIO;
4840 }
4841
4842 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4843 {
4844         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4845 }
4846
4847 static int decode_create_session(struct xdr_stream *xdr,
4848                                  struct nfs41_create_session_res *res)
4849 {
4850         __be32 *p;
4851         int status;
4852         struct nfs_client *clp = res->client;
4853         struct nfs4_session *session = clp->cl_session;
4854
4855         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4856         if (!status)
4857                 status = decode_sessionid(xdr, &session->sess_id);
4858         if (unlikely(status))
4859                 return status;
4860
4861         /* seqid, flags */
4862         p = xdr_inline_decode(xdr, 8);
4863         if (unlikely(!p))
4864                 goto out_overflow;
4865         clp->cl_seqid = be32_to_cpup(p++);
4866         session->flags = be32_to_cpup(p);
4867
4868         /* Channel attributes */
4869         status = decode_chan_attrs(xdr, &session->fc_attrs);
4870         if (!status)
4871                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4872         return status;
4873 out_overflow:
4874         print_overflow_msg(__func__, xdr);
4875         return -EIO;
4876 }
4877
4878 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4879 {
4880         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4881 }
4882
4883 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4884 {
4885         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4886 }
4887 #endif /* CONFIG_NFS_V4_1 */
4888
4889 static int decode_sequence(struct xdr_stream *xdr,
4890                            struct nfs4_sequence_res *res,
4891                            struct rpc_rqst *rqstp)
4892 {
4893 #if defined(CONFIG_NFS_V4_1)
4894         struct nfs4_sessionid id;
4895         u32 dummy;
4896         int status;
4897         __be32 *p;
4898
4899         if (!res->sr_session)
4900                 return 0;
4901
4902         status = decode_op_hdr(xdr, OP_SEQUENCE);
4903         if (!status)
4904                 status = decode_sessionid(xdr, &id);
4905         if (unlikely(status))
4906                 goto out_err;
4907
4908         /*
4909          * If the server returns different values for sessionID, slotID or
4910          * sequence number, the server is looney tunes.
4911          */
4912         status = -EREMOTEIO;
4913
4914         if (memcmp(id.data, res->sr_session->sess_id.data,
4915                    NFS4_MAX_SESSIONID_LEN)) {
4916                 dprintk("%s Invalid session id\n", __func__);
4917                 goto out_err;
4918         }
4919
4920         p = xdr_inline_decode(xdr, 20);
4921         if (unlikely(!p))
4922                 goto out_overflow;
4923
4924         /* seqid */
4925         dummy = be32_to_cpup(p++);
4926         if (dummy != res->sr_slot->seq_nr) {
4927                 dprintk("%s Invalid sequence number\n", __func__);
4928                 goto out_err;
4929         }
4930         /* slot id */
4931         dummy = be32_to_cpup(p++);
4932         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4933                 dprintk("%s Invalid slot id\n", __func__);
4934                 goto out_err;
4935         }
4936         /* highest slot id - currently not processed */
4937         dummy = be32_to_cpup(p++);
4938         /* target highest slot id - currently not processed */
4939         dummy = be32_to_cpup(p++);
4940         /* result flags */
4941         res->sr_status_flags = be32_to_cpup(p);
4942         status = 0;
4943 out_err:
4944         res->sr_status = status;
4945         return status;
4946 out_overflow:
4947         print_overflow_msg(__func__, xdr);
4948         status = -EIO;
4949         goto out_err;
4950 #else  /* CONFIG_NFS_V4_1 */
4951         return 0;
4952 #endif /* CONFIG_NFS_V4_1 */
4953 }
4954
4955 #if defined(CONFIG_NFS_V4_1)
4956
4957 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4958                                 struct pnfs_device *pdev)
4959 {
4960         __be32 *p;
4961         uint32_t len, type;
4962         int status;
4963
4964         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4965         if (status) {
4966                 if (status == -ETOOSMALL) {
4967                         p = xdr_inline_decode(xdr, 4);
4968                         if (unlikely(!p))
4969                                 goto out_overflow;
4970                         pdev->mincount = be32_to_cpup(p);
4971                         dprintk("%s: Min count too small. mincnt = %u\n",
4972                                 __func__, pdev->mincount);
4973                 }
4974                 return status;
4975         }
4976
4977         p = xdr_inline_decode(xdr, 8);
4978         if (unlikely(!p))
4979                 goto out_overflow;
4980         type = be32_to_cpup(p++);
4981         if (type != pdev->layout_type) {
4982                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4983                         __func__, pdev->layout_type, type);
4984                 return -EINVAL;
4985         }
4986         /*
4987          * Get the length of the opaque device_addr4. xdr_read_pages places
4988          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4989          * and places the remaining xdr data in xdr_buf->tail
4990          */
4991         pdev->mincount = be32_to_cpup(p);
4992         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4993
4994         /* Parse notification bitmap, verifying that it is zero. */
4995         p = xdr_inline_decode(xdr, 4);
4996         if (unlikely(!p))
4997                 goto out_overflow;
4998         len = be32_to_cpup(p);
4999         if (len) {
5000                 uint32_t i;
5001
5002                 p = xdr_inline_decode(xdr, 4 * len);
5003                 if (unlikely(!p))
5004                         goto out_overflow;
5005                 for (i = 0; i < len; i++, p++) {
5006                         if (be32_to_cpup(p)) {
5007                                 dprintk("%s: notifications not supported\n",
5008                                         __func__);
5009                                 return -EIO;
5010                         }
5011                 }
5012         }
5013         return 0;
5014 out_overflow:
5015         print_overflow_msg(__func__, xdr);
5016         return -EIO;
5017 }
5018
5019 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5020                             struct nfs4_layoutget_res *res)
5021 {
5022         __be32 *p;
5023         int status;
5024         u32 layout_count;
5025
5026         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5027         if (status)
5028                 return status;
5029         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5030         if (unlikely(!p))
5031                 goto out_overflow;
5032         res->return_on_close = be32_to_cpup(p++);
5033         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5034         layout_count = be32_to_cpup(p);
5035         if (!layout_count) {
5036                 dprintk("%s: server responded with empty layout array\n",
5037                         __func__);
5038                 return -EINVAL;
5039         }
5040
5041         p = xdr_inline_decode(xdr, 24);
5042         if (unlikely(!p))
5043                 goto out_overflow;
5044         p = xdr_decode_hyper(p, &res->range.offset);
5045         p = xdr_decode_hyper(p, &res->range.length);
5046         res->range.iomode = be32_to_cpup(p++);
5047         res->type = be32_to_cpup(p++);
5048
5049         status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
5050         if (unlikely(status))
5051                 return status;
5052
5053         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5054                 __func__,
5055                 (unsigned long)res->range.offset,
5056                 (unsigned long)res->range.length,
5057                 res->range.iomode,
5058                 res->type,
5059                 res->layout.len);
5060
5061         /* nfs4_proc_layoutget allocated a single page */
5062         if (res->layout.len > PAGE_SIZE)
5063                 return -ENOMEM;
5064         memcpy(res->layout.buf, p, res->layout.len);
5065
5066         if (layout_count > 1) {
5067                 /* We only handle a length one array at the moment.  Any
5068                  * further entries are just ignored.  Note that this means
5069                  * the client may see a response that is less than the
5070                  * minimum it requested.
5071                  */
5072                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5073                         __func__, layout_count);
5074         }
5075
5076         return 0;
5077 out_overflow:
5078         print_overflow_msg(__func__, xdr);
5079         return -EIO;
5080 }
5081
5082 static int decode_layoutcommit(struct xdr_stream *xdr,
5083                                struct rpc_rqst *req,
5084                                struct nfs4_layoutcommit_res *res)
5085 {
5086         __be32 *p;
5087         __u32 sizechanged;
5088         int status;
5089
5090         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5091         if (status)
5092                 return status;
5093
5094         p = xdr_inline_decode(xdr, 4);
5095         if (unlikely(!p))
5096                 goto out_overflow;
5097         sizechanged = be32_to_cpup(p);
5098
5099         if (sizechanged) {
5100                 /* throw away new size */
5101                 p = xdr_inline_decode(xdr, 8);
5102                 if (unlikely(!p))
5103                         goto out_overflow;
5104         }
5105         return 0;
5106 out_overflow:
5107         print_overflow_msg(__func__, xdr);
5108         return -EIO;
5109 }
5110 #endif /* CONFIG_NFS_V4_1 */
5111
5112 /*
5113  * END OF "GENERIC" DECODE ROUTINES.
5114  */
5115
5116 /*
5117  * Decode OPEN_DOWNGRADE response
5118  */
5119 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5120                                        struct xdr_stream *xdr,
5121                                        struct nfs_closeres *res)
5122 {
5123         struct compound_hdr hdr;
5124         int status;
5125
5126         status = decode_compound_hdr(xdr, &hdr);
5127         if (status)
5128                 goto out;
5129         status = decode_sequence(xdr, &res->seq_res, rqstp);
5130         if (status)
5131                 goto out;
5132         status = decode_putfh(xdr);
5133         if (status)
5134                 goto out;
5135         status = decode_open_downgrade(xdr, res);
5136         if (status != 0)
5137                 goto out;
5138         decode_getfattr(xdr, res->fattr, res->server,
5139                         !RPC_IS_ASYNC(rqstp->rq_task));
5140 out:
5141         return status;
5142 }
5143
5144 /*
5145  * Decode ACCESS response
5146  */
5147 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5148                                struct nfs4_accessres *res)
5149 {
5150         struct compound_hdr hdr;
5151         int status;
5152
5153         status = decode_compound_hdr(xdr, &hdr);
5154         if (status)
5155                 goto out;
5156         status = decode_sequence(xdr, &res->seq_res, rqstp);
5157         if (status)
5158                 goto out;
5159         status = decode_putfh(xdr);
5160         if (status != 0)
5161                 goto out;
5162         status = decode_access(xdr, res);
5163         if (status != 0)
5164                 goto out;
5165         decode_getfattr(xdr, res->fattr, res->server,
5166                         !RPC_IS_ASYNC(rqstp->rq_task));
5167 out:
5168         return status;
5169 }
5170
5171 /*
5172  * Decode LOOKUP response
5173  */
5174 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5175                                struct nfs4_lookup_res *res)
5176 {
5177         struct compound_hdr hdr;
5178         int status;
5179
5180         status = decode_compound_hdr(xdr, &hdr);
5181         if (status)
5182                 goto out;
5183         status = decode_sequence(xdr, &res->seq_res, rqstp);
5184         if (status)
5185                 goto out;
5186         status = decode_putfh(xdr);
5187         if (status)
5188                 goto out;
5189         status = decode_lookup(xdr);
5190         if (status)
5191                 goto out;
5192         status = decode_getfh(xdr, res->fh);
5193         if (status)
5194                 goto out;
5195         status = decode_getfattr(xdr, res->fattr, res->server
5196                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5197 out:
5198         return status;
5199 }
5200
5201 /*
5202  * Decode LOOKUP_ROOT response
5203  */
5204 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5205                                     struct xdr_stream *xdr,
5206                                     struct nfs4_lookup_res *res)
5207 {
5208         struct compound_hdr hdr;
5209         int status;
5210
5211         status = decode_compound_hdr(xdr, &hdr);
5212         if (status)
5213                 goto out;
5214         status = decode_sequence(xdr, &res->seq_res, rqstp);
5215         if (status)
5216                 goto out;
5217         status = decode_putrootfh(xdr);
5218         if (status)
5219                 goto out;
5220         status = decode_getfh(xdr, res->fh);
5221         if (status == 0)
5222                 status = decode_getfattr(xdr, res->fattr, res->server,
5223                                 !RPC_IS_ASYNC(rqstp->rq_task));
5224 out:
5225         return status;
5226 }
5227
5228 /*
5229  * Decode REMOVE response
5230  */
5231 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5232                                struct nfs_removeres *res)
5233 {
5234         struct compound_hdr hdr;
5235         int status;
5236
5237         status = decode_compound_hdr(xdr, &hdr);
5238         if (status)
5239                 goto out;
5240         status = decode_sequence(xdr, &res->seq_res, rqstp);
5241         if (status)
5242                 goto out;
5243         status = decode_putfh(xdr);
5244         if (status)
5245                 goto out;
5246         status = decode_remove(xdr, &res->cinfo);
5247         if (status)
5248                 goto out;
5249         decode_getfattr(xdr, res->dir_attr, res->server,
5250                         !RPC_IS_ASYNC(rqstp->rq_task));
5251 out:
5252         return status;
5253 }
5254
5255 /*
5256  * Decode RENAME response
5257  */
5258 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5259                                struct nfs_renameres *res)
5260 {
5261         struct compound_hdr hdr;
5262         int status;
5263
5264         status = decode_compound_hdr(xdr, &hdr);
5265         if (status)
5266                 goto out;
5267         status = decode_sequence(xdr, &res->seq_res, rqstp);
5268         if (status)
5269                 goto out;
5270         status = decode_putfh(xdr);
5271         if (status)
5272                 goto out;
5273         status = decode_savefh(xdr);
5274         if (status)
5275                 goto out;
5276         status = decode_putfh(xdr);
5277         if (status)
5278                 goto out;
5279         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5280         if (status)
5281                 goto out;
5282         /* Current FH is target directory */
5283         if (decode_getfattr(xdr, res->new_fattr, res->server,
5284                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5285                 goto out;
5286         status = decode_restorefh(xdr);
5287         if (status)
5288                 goto out;
5289         decode_getfattr(xdr, res->old_fattr, res->server,
5290                         !RPC_IS_ASYNC(rqstp->rq_task));
5291 out:
5292         return status;
5293 }
5294
5295 /*
5296  * Decode LINK response
5297  */
5298 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5299                              struct nfs4_link_res *res)
5300 {
5301         struct compound_hdr hdr;
5302         int status;
5303
5304         status = decode_compound_hdr(xdr, &hdr);
5305         if (status)
5306                 goto out;
5307         status = decode_sequence(xdr, &res->seq_res, rqstp);
5308         if (status)
5309                 goto out;
5310         status = decode_putfh(xdr);
5311         if (status)
5312                 goto out;
5313         status = decode_savefh(xdr);
5314         if (status)
5315                 goto out;
5316         status = decode_putfh(xdr);
5317         if (status)
5318                 goto out;
5319         status = decode_link(xdr, &res->cinfo);
5320         if (status)
5321                 goto out;
5322         /*
5323          * Note order: OP_LINK leaves the directory as the current
5324          *             filehandle.
5325          */
5326         if (decode_getfattr(xdr, res->dir_attr, res->server,
5327                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5328                 goto out;
5329         status = decode_restorefh(xdr);
5330         if (status)
5331                 goto out;
5332         decode_getfattr(xdr, res->fattr, res->server,
5333                         !RPC_IS_ASYNC(rqstp->rq_task));
5334 out:
5335         return status;
5336 }
5337
5338 /*
5339  * Decode CREATE response
5340  */
5341 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5342                                struct nfs4_create_res *res)
5343 {
5344         struct compound_hdr hdr;
5345         int status;
5346
5347         status = decode_compound_hdr(xdr, &hdr);
5348         if (status)
5349                 goto out;
5350         status = decode_sequence(xdr, &res->seq_res, rqstp);
5351         if (status)
5352                 goto out;
5353         status = decode_putfh(xdr);
5354         if (status)
5355                 goto out;
5356         status = decode_savefh(xdr);
5357         if (status)
5358                 goto out;
5359         status = decode_create(xdr, &res->dir_cinfo);
5360         if (status)
5361                 goto out;
5362         status = decode_getfh(xdr, res->fh);
5363         if (status)
5364                 goto out;
5365         if (decode_getfattr(xdr, res->fattr, res->server,
5366                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5367                 goto out;
5368         status = decode_restorefh(xdr);
5369         if (status)
5370                 goto out;
5371         decode_getfattr(xdr, res->dir_fattr, res->server,
5372                         !RPC_IS_ASYNC(rqstp->rq_task));
5373 out:
5374         return status;
5375 }
5376
5377 /*
5378  * Decode SYMLINK response
5379  */
5380 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5381                                 struct nfs4_create_res *res)
5382 {
5383         return nfs4_xdr_dec_create(rqstp, xdr, res);
5384 }
5385
5386 /*
5387  * Decode GETATTR response
5388  */
5389 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5390                                 struct nfs4_getattr_res *res)
5391 {
5392         struct compound_hdr hdr;
5393         int status;
5394
5395         status = decode_compound_hdr(xdr, &hdr);
5396         if (status)
5397                 goto out;
5398         status = decode_sequence(xdr, &res->seq_res, rqstp);
5399         if (status)
5400                 goto out;
5401         status = decode_putfh(xdr);
5402         if (status)
5403                 goto out;
5404         status = decode_getfattr(xdr, res->fattr, res->server,
5405                         !RPC_IS_ASYNC(rqstp->rq_task));
5406 out:
5407         return status;
5408 }
5409
5410 /*
5411  * Encode an SETACL request
5412  */
5413 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5414                                 struct nfs_setaclargs *args)
5415 {
5416         struct compound_hdr hdr = {
5417                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5418         };
5419
5420         encode_compound_hdr(xdr, req, &hdr);
5421         encode_sequence(xdr, &args->seq_args, &hdr);
5422         encode_putfh(xdr, args->fh, &hdr);
5423         encode_setacl(xdr, args, &hdr);
5424         encode_nops(&hdr);
5425 }
5426
5427 /*
5428  * Decode SETACL response
5429  */
5430 static int
5431 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5432                     struct nfs_setaclres *res)
5433 {
5434         struct compound_hdr hdr;
5435         int status;
5436
5437         status = decode_compound_hdr(xdr, &hdr);
5438         if (status)
5439                 goto out;
5440         status = decode_sequence(xdr, &res->seq_res, rqstp);
5441         if (status)
5442                 goto out;
5443         status = decode_putfh(xdr);
5444         if (status)
5445                 goto out;
5446         status = decode_setattr(xdr);
5447 out:
5448         return status;
5449 }
5450
5451 /*
5452  * Decode GETACL response
5453  */
5454 static int
5455 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5456                     struct nfs_getaclres *res)
5457 {
5458         struct compound_hdr hdr;
5459         int status;
5460
5461         status = decode_compound_hdr(xdr, &hdr);
5462         if (status)
5463                 goto out;
5464         status = decode_sequence(xdr, &res->seq_res, rqstp);
5465         if (status)
5466                 goto out;
5467         status = decode_putfh(xdr);
5468         if (status)
5469                 goto out;
5470         status = decode_getacl(xdr, rqstp, &res->acl_len);
5471
5472 out:
5473         return status;
5474 }
5475
5476 /*
5477  * Decode CLOSE response
5478  */
5479 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5480                               struct nfs_closeres *res)
5481 {
5482         struct compound_hdr hdr;
5483         int status;
5484
5485         status = decode_compound_hdr(xdr, &hdr);
5486         if (status)
5487                 goto out;
5488         status = decode_sequence(xdr, &res->seq_res, rqstp);
5489         if (status)
5490                 goto out;
5491         status = decode_putfh(xdr);
5492         if (status)
5493                 goto out;
5494         status = decode_close(xdr, res);
5495         if (status != 0)
5496                 goto out;
5497         /*
5498          * Note: Server may do delete on close for this file
5499          *      in which case the getattr call will fail with
5500          *      an ESTALE error. Shouldn't be a problem,
5501          *      though, since fattr->valid will remain unset.
5502          */
5503         decode_getfattr(xdr, res->fattr, res->server,
5504                         !RPC_IS_ASYNC(rqstp->rq_task));
5505 out:
5506         return status;
5507 }
5508
5509 /*
5510  * Decode OPEN response
5511  */
5512 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5513                              struct nfs_openres *res)
5514 {
5515         struct compound_hdr hdr;
5516         int status;
5517
5518         status = decode_compound_hdr(xdr, &hdr);
5519         if (status)
5520                 goto out;
5521         status = decode_sequence(xdr, &res->seq_res, rqstp);
5522         if (status)
5523                 goto out;
5524         status = decode_putfh(xdr);
5525         if (status)
5526                 goto out;
5527         status = decode_savefh(xdr);
5528         if (status)
5529                 goto out;
5530         status = decode_open(xdr, res);
5531         if (status)
5532                 goto out;
5533         if (decode_getfh(xdr, &res->fh) != 0)
5534                 goto out;
5535         if (decode_getfattr(xdr, res->f_attr, res->server,
5536                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5537                 goto out;
5538         if (decode_restorefh(xdr) != 0)
5539                 goto out;
5540         decode_getfattr(xdr, res->dir_attr, res->server,
5541                         !RPC_IS_ASYNC(rqstp->rq_task));
5542 out:
5543         return status;
5544 }
5545
5546 /*
5547  * Decode OPEN_CONFIRM response
5548  */
5549 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5550                                      struct xdr_stream *xdr,
5551                                      struct nfs_open_confirmres *res)
5552 {
5553         struct compound_hdr hdr;
5554         int status;
5555
5556         status = decode_compound_hdr(xdr, &hdr);
5557         if (status)
5558                 goto out;
5559         status = decode_putfh(xdr);
5560         if (status)
5561                 goto out;
5562         status = decode_open_confirm(xdr, res);
5563 out:
5564         return status;
5565 }
5566
5567 /*
5568  * Decode OPEN response
5569  */
5570 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5571                                     struct xdr_stream *xdr,
5572                                     struct nfs_openres *res)
5573 {
5574         struct compound_hdr hdr;
5575         int status;
5576
5577         status = decode_compound_hdr(xdr, &hdr);
5578         if (status)
5579                 goto out;
5580         status = decode_sequence(xdr, &res->seq_res, rqstp);
5581         if (status)
5582                 goto out;
5583         status = decode_putfh(xdr);
5584         if (status)
5585                 goto out;
5586         status = decode_open(xdr, res);
5587         if (status)
5588                 goto out;
5589         decode_getfattr(xdr, res->f_attr, res->server,
5590                         !RPC_IS_ASYNC(rqstp->rq_task));
5591 out:
5592         return status;
5593 }
5594
5595 /*
5596  * Decode SETATTR response
5597  */
5598 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5599                                 struct xdr_stream *xdr,
5600                                 struct nfs_setattrres *res)
5601 {
5602         struct compound_hdr hdr;
5603         int status;
5604
5605         status = decode_compound_hdr(xdr, &hdr);
5606         if (status)
5607                 goto out;
5608         status = decode_sequence(xdr, &res->seq_res, rqstp);
5609         if (status)
5610                 goto out;
5611         status = decode_putfh(xdr);
5612         if (status)
5613                 goto out;
5614         status = decode_setattr(xdr);
5615         if (status)
5616                 goto out;
5617         decode_getfattr(xdr, res->fattr, res->server,
5618                         !RPC_IS_ASYNC(rqstp->rq_task));
5619 out:
5620         return status;
5621 }
5622
5623 /*
5624  * Decode LOCK response
5625  */
5626 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5627                              struct nfs_lock_res *res)
5628 {
5629         struct compound_hdr hdr;
5630         int status;
5631
5632         status = decode_compound_hdr(xdr, &hdr);
5633         if (status)
5634                 goto out;
5635         status = decode_sequence(xdr, &res->seq_res, rqstp);
5636         if (status)
5637                 goto out;
5638         status = decode_putfh(xdr);
5639         if (status)
5640                 goto out;
5641         status = decode_lock(xdr, res);
5642 out:
5643         return status;
5644 }
5645
5646 /*
5647  * Decode LOCKT response
5648  */
5649 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5650                               struct nfs_lockt_res *res)
5651 {
5652         struct compound_hdr hdr;
5653         int status;
5654
5655         status = decode_compound_hdr(xdr, &hdr);
5656         if (status)
5657                 goto out;
5658         status = decode_sequence(xdr, &res->seq_res, rqstp);
5659         if (status)
5660                 goto out;
5661         status = decode_putfh(xdr);
5662         if (status)
5663                 goto out;
5664         status = decode_lockt(xdr, res);
5665 out:
5666         return status;
5667 }
5668
5669 /*
5670  * Decode LOCKU response
5671  */
5672 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5673                               struct nfs_locku_res *res)
5674 {
5675         struct compound_hdr hdr;
5676         int status;
5677
5678         status = decode_compound_hdr(xdr, &hdr);
5679         if (status)
5680                 goto out;
5681         status = decode_sequence(xdr, &res->seq_res, rqstp);
5682         if (status)
5683                 goto out;
5684         status = decode_putfh(xdr);
5685         if (status)
5686                 goto out;
5687         status = decode_locku(xdr, res);
5688 out:
5689         return status;
5690 }
5691
5692 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5693                                           struct xdr_stream *xdr, void *dummy)
5694 {
5695         struct compound_hdr hdr;
5696         int status;
5697
5698         status = decode_compound_hdr(xdr, &hdr);
5699         if (!status)
5700                 status = decode_release_lockowner(xdr);
5701         return status;
5702 }
5703
5704 /*
5705  * Decode READLINK response
5706  */
5707 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5708                                  struct xdr_stream *xdr,
5709                                  struct nfs4_readlink_res *res)
5710 {
5711         struct compound_hdr hdr;
5712         int status;
5713
5714         status = decode_compound_hdr(xdr, &hdr);
5715         if (status)
5716                 goto out;
5717         status = decode_sequence(xdr, &res->seq_res, rqstp);
5718         if (status)
5719                 goto out;
5720         status = decode_putfh(xdr);
5721         if (status)
5722                 goto out;
5723         status = decode_readlink(xdr, rqstp);
5724 out:
5725         return status;
5726 }
5727
5728 /*
5729  * Decode READDIR response
5730  */
5731 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5732                                 struct nfs4_readdir_res *res)
5733 {
5734         struct compound_hdr hdr;
5735         int status;
5736
5737         status = decode_compound_hdr(xdr, &hdr);
5738         if (status)
5739                 goto out;
5740         status = decode_sequence(xdr, &res->seq_res, rqstp);
5741         if (status)
5742                 goto out;
5743         status = decode_putfh(xdr);
5744         if (status)
5745                 goto out;
5746         status = decode_readdir(xdr, rqstp, res);
5747 out:
5748         return status;
5749 }
5750
5751 /*
5752  * Decode Read response
5753  */
5754 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5755                              struct nfs_readres *res)
5756 {
5757         struct compound_hdr hdr;
5758         int status;
5759
5760         status = decode_compound_hdr(xdr, &hdr);
5761         if (status)
5762                 goto out;
5763         status = decode_sequence(xdr, &res->seq_res, rqstp);
5764         if (status)
5765                 goto out;
5766         status = decode_putfh(xdr);
5767         if (status)
5768                 goto out;
5769         status = decode_read(xdr, rqstp, res);
5770         if (!status)
5771                 status = res->count;
5772 out:
5773         return status;
5774 }
5775
5776 /*
5777  * Decode WRITE response
5778  */
5779 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5780                               struct nfs_writeres *res)
5781 {
5782         struct compound_hdr hdr;
5783         int status;
5784
5785         status = decode_compound_hdr(xdr, &hdr);
5786         if (status)
5787                 goto out;
5788         status = decode_sequence(xdr, &res->seq_res, rqstp);
5789         if (status)
5790                 goto out;
5791         status = decode_putfh(xdr);
5792         if (status)
5793                 goto out;
5794         status = decode_write(xdr, res);
5795         if (status)
5796                 goto out;
5797         if (res->fattr)
5798                 decode_getfattr(xdr, res->fattr, res->server,
5799                                 !RPC_IS_ASYNC(rqstp->rq_task));
5800         if (!status)
5801                 status = res->count;
5802 out:
5803         return status;
5804 }
5805
5806 /*
5807  * Decode COMMIT response
5808  */
5809 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5810                                struct nfs_writeres *res)
5811 {
5812         struct compound_hdr hdr;
5813         int status;
5814
5815         status = decode_compound_hdr(xdr, &hdr);
5816         if (status)
5817                 goto out;
5818         status = decode_sequence(xdr, &res->seq_res, rqstp);
5819         if (status)
5820                 goto out;
5821         status = decode_putfh(xdr);
5822         if (status)
5823                 goto out;
5824         status = decode_commit(xdr, res);
5825         if (status)
5826                 goto out;
5827         if (res->fattr)
5828                 decode_getfattr(xdr, res->fattr, res->server,
5829                                 !RPC_IS_ASYNC(rqstp->rq_task));
5830 out:
5831         return status;
5832 }
5833
5834 /*
5835  * Decode FSINFO response
5836  */
5837 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5838                                struct nfs4_fsinfo_res *res)
5839 {
5840         struct compound_hdr hdr;
5841         int status;
5842
5843         status = decode_compound_hdr(xdr, &hdr);
5844         if (!status)
5845                 status = decode_sequence(xdr, &res->seq_res, req);
5846         if (!status)
5847                 status = decode_putfh(xdr);
5848         if (!status)
5849                 status = decode_fsinfo(xdr, res->fsinfo);
5850         return status;
5851 }
5852
5853 /*
5854  * Decode PATHCONF response
5855  */
5856 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5857                                  struct nfs4_pathconf_res *res)
5858 {
5859         struct compound_hdr hdr;
5860         int status;
5861
5862         status = decode_compound_hdr(xdr, &hdr);
5863         if (!status)
5864                 status = decode_sequence(xdr, &res->seq_res, req);
5865         if (!status)
5866                 status = decode_putfh(xdr);
5867         if (!status)
5868                 status = decode_pathconf(xdr, res->pathconf);
5869         return status;
5870 }
5871
5872 /*
5873  * Decode STATFS response
5874  */
5875 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5876                                struct nfs4_statfs_res *res)
5877 {
5878         struct compound_hdr hdr;
5879         int status;
5880
5881         status = decode_compound_hdr(xdr, &hdr);
5882         if (!status)
5883                 status = decode_sequence(xdr, &res->seq_res, req);
5884         if (!status)
5885                 status = decode_putfh(xdr);
5886         if (!status)
5887                 status = decode_statfs(xdr, res->fsstat);
5888         return status;
5889 }
5890
5891 /*
5892  * Decode GETATTR_BITMAP response
5893  */
5894 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5895                                     struct xdr_stream *xdr,
5896                                     struct nfs4_server_caps_res *res)
5897 {
5898         struct compound_hdr hdr;
5899         int status;
5900
5901         status = decode_compound_hdr(xdr, &hdr);
5902         if (status)
5903                 goto out;
5904         status = decode_sequence(xdr, &res->seq_res, req);
5905         if (status)
5906                 goto out;
5907         status = decode_putfh(xdr);
5908         if (status)
5909                 goto out;
5910         status = decode_server_caps(xdr, res);
5911 out:
5912         return status;
5913 }
5914
5915 /*
5916  * Decode RENEW response
5917  */
5918 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5919                               void *__unused)
5920 {
5921         struct compound_hdr hdr;
5922         int status;
5923
5924         status = decode_compound_hdr(xdr, &hdr);
5925         if (!status)
5926                 status = decode_renew(xdr);
5927         return status;
5928 }
5929
5930 /*
5931  * Decode SETCLIENTID response
5932  */
5933 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5934                                     struct xdr_stream *xdr,
5935                                     struct nfs4_setclientid_res *res)
5936 {
5937         struct compound_hdr hdr;
5938         int status;
5939
5940         status = decode_compound_hdr(xdr, &hdr);
5941         if (!status)
5942                 status = decode_setclientid(xdr, res);
5943         return status;
5944 }
5945
5946 /*
5947  * Decode SETCLIENTID_CONFIRM response
5948  */
5949 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5950                                             struct xdr_stream *xdr,
5951                                             struct nfs_fsinfo *fsinfo)
5952 {
5953         struct compound_hdr hdr;
5954         int status;
5955
5956         status = decode_compound_hdr(xdr, &hdr);
5957         if (!status)
5958                 status = decode_setclientid_confirm(xdr);
5959         if (!status)
5960                 status = decode_putrootfh(xdr);
5961         if (!status)
5962                 status = decode_fsinfo(xdr, fsinfo);
5963         return status;
5964 }
5965
5966 /*
5967  * Decode DELEGRETURN response
5968  */
5969 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5970                                     struct xdr_stream *xdr,
5971                                     struct nfs4_delegreturnres *res)
5972 {
5973         struct compound_hdr hdr;
5974         int status;
5975
5976         status = decode_compound_hdr(xdr, &hdr);
5977         if (status)
5978                 goto out;
5979         status = decode_sequence(xdr, &res->seq_res, rqstp);
5980         if (status)
5981                 goto out;
5982         status = decode_putfh(xdr);
5983         if (status != 0)
5984                 goto out;
5985         status = decode_delegreturn(xdr);
5986         if (status != 0)
5987                 goto out;
5988         decode_getfattr(xdr, res->fattr, res->server,
5989                         !RPC_IS_ASYNC(rqstp->rq_task));
5990 out:
5991         return status;
5992 }
5993
5994 /*
5995  * Decode FS_LOCATIONS response
5996  */
5997 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
5998                                      struct xdr_stream *xdr,
5999                                      struct nfs4_fs_locations_res *res)
6000 {
6001         struct compound_hdr hdr;
6002         int status;
6003
6004         status = decode_compound_hdr(xdr, &hdr);
6005         if (status)
6006                 goto out;
6007         status = decode_sequence(xdr, &res->seq_res, req);
6008         if (status)
6009                 goto out;
6010         status = decode_putfh(xdr);
6011         if (status)
6012                 goto out;
6013         status = decode_lookup(xdr);
6014         if (status)
6015                 goto out;
6016         xdr_enter_page(xdr, PAGE_SIZE);
6017         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6018                                  res->fs_locations->server,
6019                                  !RPC_IS_ASYNC(req->rq_task));
6020 out:
6021         return status;
6022 }
6023
6024 #if defined(CONFIG_NFS_V4_1)
6025 /*
6026  * Decode EXCHANGE_ID response
6027  */
6028 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6029                                     struct xdr_stream *xdr,
6030                                     void *res)
6031 {
6032         struct compound_hdr hdr;
6033         int status;
6034
6035         status = decode_compound_hdr(xdr, &hdr);
6036         if (!status)
6037                 status = decode_exchange_id(xdr, res);
6038         return status;
6039 }
6040
6041 /*
6042  * Decode CREATE_SESSION response
6043  */
6044 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6045                                        struct xdr_stream *xdr,
6046                                        struct nfs41_create_session_res *res)
6047 {
6048         struct compound_hdr hdr;
6049         int status;
6050
6051         status = decode_compound_hdr(xdr, &hdr);
6052         if (!status)
6053                 status = decode_create_session(xdr, res);
6054         return status;
6055 }
6056
6057 /*
6058  * Decode DESTROY_SESSION response
6059  */
6060 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6061                                         struct xdr_stream *xdr,
6062                                         void *res)
6063 {
6064         struct compound_hdr hdr;
6065         int status;
6066
6067         status = decode_compound_hdr(xdr, &hdr);
6068         if (!status)
6069                 status = decode_destroy_session(xdr, res);
6070         return status;
6071 }
6072
6073 /*
6074  * Decode SEQUENCE response
6075  */
6076 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6077                                  struct xdr_stream *xdr,
6078                                  struct nfs4_sequence_res *res)
6079 {
6080         struct compound_hdr hdr;
6081         int status;
6082
6083         status = decode_compound_hdr(xdr, &hdr);
6084         if (!status)
6085                 status = decode_sequence(xdr, res, rqstp);
6086         return status;
6087 }
6088
6089 /*
6090  * Decode GET_LEASE_TIME response
6091  */
6092 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6093                                        struct xdr_stream *xdr,
6094                                        struct nfs4_get_lease_time_res *res)
6095 {
6096         struct compound_hdr hdr;
6097         int status;
6098
6099         status = decode_compound_hdr(xdr, &hdr);
6100         if (!status)
6101                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6102         if (!status)
6103                 status = decode_putrootfh(xdr);
6104         if (!status)
6105                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6106         return status;
6107 }
6108
6109 /*
6110  * Decode RECLAIM_COMPLETE response
6111  */
6112 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6113                                          struct xdr_stream *xdr,
6114                                          struct nfs41_reclaim_complete_res *res)
6115 {
6116         struct compound_hdr hdr;
6117         int status;
6118
6119         status = decode_compound_hdr(xdr, &hdr);
6120         if (!status)
6121                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6122         if (!status)
6123                 status = decode_reclaim_complete(xdr, (void *)NULL);
6124         return status;
6125 }
6126
6127 /*
6128  * Decode GETDEVINFO response
6129  */
6130 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6131                                       struct xdr_stream *xdr,
6132                                       struct nfs4_getdeviceinfo_res *res)
6133 {
6134         struct compound_hdr hdr;
6135         int status;
6136
6137         status = decode_compound_hdr(xdr, &hdr);
6138         if (status != 0)
6139                 goto out;
6140         status = decode_sequence(xdr, &res->seq_res, rqstp);
6141         if (status != 0)
6142                 goto out;
6143         status = decode_getdeviceinfo(xdr, res->pdev);
6144 out:
6145         return status;
6146 }
6147
6148 /*
6149  * Decode LAYOUTGET response
6150  */
6151 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6152                                   struct xdr_stream *xdr,
6153                                   struct nfs4_layoutget_res *res)
6154 {
6155         struct compound_hdr hdr;
6156         int status;
6157
6158         status = decode_compound_hdr(xdr, &hdr);
6159         if (status)
6160                 goto out;
6161         status = decode_sequence(xdr, &res->seq_res, rqstp);
6162         if (status)
6163                 goto out;
6164         status = decode_putfh(xdr);
6165         if (status)
6166                 goto out;
6167         status = decode_layoutget(xdr, rqstp, res);
6168 out:
6169         return status;
6170 }
6171
6172 /*
6173  * Decode LAYOUTCOMMIT response
6174  */
6175 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6176                                      struct xdr_stream *xdr,
6177                                      struct nfs4_layoutcommit_res *res)
6178 {
6179         struct compound_hdr hdr;
6180         int status;
6181
6182         status = decode_compound_hdr(xdr, &hdr);
6183         if (status)
6184                 goto out;
6185         status = decode_sequence(xdr, &res->seq_res, rqstp);
6186         if (status)
6187                 goto out;
6188         status = decode_putfh(xdr);
6189         if (status)
6190                 goto out;
6191         status = decode_layoutcommit(xdr, rqstp, res);
6192         if (status)
6193                 goto out;
6194         decode_getfattr(xdr, res->fattr, res->server,
6195                         !RPC_IS_ASYNC(rqstp->rq_task));
6196 out:
6197         return status;
6198 }
6199 #endif /* CONFIG_NFS_V4_1 */
6200
6201 /**
6202  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6203  *                      the local page cache.
6204  * @xdr: XDR stream where entry resides
6205  * @entry: buffer to fill in with entry data
6206  * @plus: boolean indicating whether this should be a readdirplus entry
6207  *
6208  * Returns zero if successful, otherwise a negative errno value is
6209  * returned.
6210  *
6211  * This function is not invoked during READDIR reply decoding, but
6212  * rather whenever an application invokes the getdents(2) system call
6213  * on a directory already in our cache.
6214  */
6215 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6216                        int plus)
6217 {
6218         uint32_t bitmap[2] = {0};
6219         uint32_t len;
6220         __be32 *p = xdr_inline_decode(xdr, 4);
6221         if (unlikely(!p))
6222                 goto out_overflow;
6223         if (*p == xdr_zero) {
6224                 p = xdr_inline_decode(xdr, 4);
6225                 if (unlikely(!p))
6226                         goto out_overflow;
6227                 if (*p == xdr_zero)
6228                         return -EAGAIN;
6229                 entry->eof = 1;
6230                 return -EBADCOOKIE;
6231         }
6232
6233         p = xdr_inline_decode(xdr, 12);
6234         if (unlikely(!p))
6235                 goto out_overflow;
6236         entry->prev_cookie = entry->cookie;
6237         p = xdr_decode_hyper(p, &entry->cookie);
6238         entry->len = be32_to_cpup(p);
6239
6240         p = xdr_inline_decode(xdr, entry->len);
6241         if (unlikely(!p))
6242                 goto out_overflow;
6243         entry->name = (const char *) p;
6244
6245         /*
6246          * In case the server doesn't return an inode number,
6247          * we fake one here.  (We don't use inode number 0,
6248          * since glibc seems to choke on it...)
6249          */
6250         entry->ino = 1;
6251         entry->fattr->valid = 0;
6252
6253         if (decode_attr_bitmap(xdr, bitmap) < 0)
6254                 goto out_overflow;
6255
6256         if (decode_attr_length(xdr, &len, &p) < 0)
6257                 goto out_overflow;
6258
6259         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6260                                         entry->server, 1) < 0)
6261                 goto out_overflow;
6262         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6263                 entry->ino = entry->fattr->fileid;
6264
6265         entry->d_type = DT_UNKNOWN;
6266         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6267                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6268
6269         return 0;
6270
6271 out_overflow:
6272         print_overflow_msg(__func__, xdr);
6273         return -EAGAIN;
6274 }
6275
6276 /*
6277  * We need to translate between nfs status return values and
6278  * the local errno values which may not be the same.
6279  */
6280 static struct {
6281         int stat;
6282         int errno;
6283 } nfs_errtbl[] = {
6284         { NFS4_OK,              0               },
6285         { NFS4ERR_PERM,         -EPERM          },
6286         { NFS4ERR_NOENT,        -ENOENT         },
6287         { NFS4ERR_IO,           -errno_NFSERR_IO},
6288         { NFS4ERR_NXIO,         -ENXIO          },
6289         { NFS4ERR_ACCESS,       -EACCES         },
6290         { NFS4ERR_EXIST,        -EEXIST         },
6291         { NFS4ERR_XDEV,         -EXDEV          },
6292         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6293         { NFS4ERR_ISDIR,        -EISDIR         },
6294         { NFS4ERR_INVAL,        -EINVAL         },
6295         { NFS4ERR_FBIG,         -EFBIG          },
6296         { NFS4ERR_NOSPC,        -ENOSPC         },
6297         { NFS4ERR_ROFS,         -EROFS          },
6298         { NFS4ERR_MLINK,        -EMLINK         },
6299         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6300         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6301         { NFS4ERR_DQUOT,        -EDQUOT         },
6302         { NFS4ERR_STALE,        -ESTALE         },
6303         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6304         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6305         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6306         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6307         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6308         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6309         { NFS4ERR_LOCKED,       -EAGAIN         },
6310         { NFS4ERR_SYMLINK,      -ELOOP          },
6311         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6312         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6313         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
6314                                                     * to be handled by a
6315                                                     * middle-layer.
6316                                                     */
6317         { -1,                   -EIO            }
6318 };
6319
6320 /*
6321  * Convert an NFS error code to a local one.
6322  * This one is used jointly by NFSv2 and NFSv3.
6323  */
6324 static int
6325 nfs4_stat_to_errno(int stat)
6326 {
6327         int i;
6328         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6329                 if (nfs_errtbl[i].stat == stat)
6330                         return nfs_errtbl[i].errno;
6331         }
6332         if (stat <= 10000 || stat > 10100) {
6333                 /* The server is looney tunes. */
6334                 return -EREMOTEIO;
6335         }
6336         /* If we cannot translate the error, the recovery routines should
6337          * handle it.
6338          * Note: remaining NFSv4 error codes have values > 10000, so should
6339          * not conflict with native Linux error codes.
6340          */
6341         return -stat;
6342 }
6343
6344 #define PROC(proc, argtype, restype)                            \
6345 [NFSPROC4_CLNT_##proc] = {                                      \
6346         .p_proc   = NFSPROC4_COMPOUND,                          \
6347         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6348         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6349         .p_arglen = NFS4_##argtype##_sz,                        \
6350         .p_replen = NFS4_##restype##_sz,                        \
6351         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6352         .p_name   = #proc,                                      \
6353 }
6354
6355 struct rpc_procinfo     nfs4_procedures[] = {
6356         PROC(READ,              enc_read,               dec_read),
6357         PROC(WRITE,             enc_write,              dec_write),
6358         PROC(COMMIT,            enc_commit,             dec_commit),
6359         PROC(OPEN,              enc_open,               dec_open),
6360         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6361         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6362         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6363         PROC(CLOSE,             enc_close,              dec_close),
6364         PROC(SETATTR,           enc_setattr,            dec_setattr),
6365         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6366         PROC(RENEW,             enc_renew,              dec_renew),
6367         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6368         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6369         PROC(LOCK,              enc_lock,               dec_lock),
6370         PROC(LOCKT,             enc_lockt,              dec_lockt),
6371         PROC(LOCKU,             enc_locku,              dec_locku),
6372         PROC(ACCESS,            enc_access,             dec_access),
6373         PROC(GETATTR,           enc_getattr,            dec_getattr),
6374         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6375         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6376         PROC(REMOVE,            enc_remove,             dec_remove),
6377         PROC(RENAME,            enc_rename,             dec_rename),
6378         PROC(LINK,              enc_link,               dec_link),
6379         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6380         PROC(CREATE,            enc_create,             dec_create),
6381         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6382         PROC(STATFS,            enc_statfs,             dec_statfs),
6383         PROC(READLINK,          enc_readlink,           dec_readlink),
6384         PROC(READDIR,           enc_readdir,            dec_readdir),
6385         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6386         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6387         PROC(GETACL,            enc_getacl,             dec_getacl),
6388         PROC(SETACL,            enc_setacl,             dec_setacl),
6389         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6390         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6391 #if defined(CONFIG_NFS_V4_1)
6392         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6393         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6394         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6395         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6396         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6397         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6398         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6399         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6400         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
6401 #endif /* CONFIG_NFS_V4_1 */
6402 };
6403
6404 struct rpc_version              nfs_version4 = {
6405         .number                 = 4,
6406         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6407         .procs                  = nfs4_procedures
6408 };
6409
6410 /*
6411  * Local variables:
6412  *  c-basic-offset: 8
6413  * End:
6414  */