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 + 4)
  75 #define lock_owner_id_maxsz     (1 + 4)
  76 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  77 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  78 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define op_encode_hdr_maxsz     (1)
  80 #define op_decode_hdr_maxsz     (2)
  81 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  82 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  84 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  86                                 (NFS4_FHSIZE >> 2))
  87 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  88 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  89 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  90 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  91 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  92                                 ((3+NFS4_FHSIZE) >> 2))
  93 #define nfs4_fattr_bitmap_maxsz 3
  94 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  95 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  96 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  97 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  98 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 /* This is based on getfattr, which uses the most attributes: */
 100 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 101                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 102 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 103                                 nfs4_fattr_value_maxsz)
 104 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 105 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 106                                  1 + 2 + 1 + \
 107                                 nfs4_owner_maxsz + \
 108                                 nfs4_group_maxsz + \
 109                                 4 + 4)
 110 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 111 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 112 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 113 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 114 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 115 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 11)
 116 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 117 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 118 #define encode_setclientid_maxsz \
 119                                 (op_encode_hdr_maxsz + \
 120                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 121                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 122                                 1 /* sc_prog */ + \
 123                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 124                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 125                                 1) /* sc_cb_ident */
 126 #define decode_setclientid_maxsz \
 127                                 (op_decode_hdr_maxsz + \
 128                                 2 + \
 129                                 1024) /* large value for CLID_INUSE */
 130 #define encode_setclientid_confirm_maxsz \
 131                                 (op_encode_hdr_maxsz + \
 132                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 133 #define decode_setclientid_confirm_maxsz \
 134                                 (op_decode_hdr_maxsz)
 135 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 136 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 137 #define encode_share_access_maxsz \
 138                                 (2)
 139 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 140 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 141 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 142 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 143                                 2 + encode_share_access_maxsz + 2 + \
 144                                 open_owner_id_maxsz + \
 145                                 encode_opentype_maxsz + \
 146                                 encode_claim_null_maxsz)
 147 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 148 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 149                                 decode_ace_maxsz)
 150 #define decode_change_info_maxsz        (5)
 151 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 152                                 decode_stateid_maxsz + \
 153                                 decode_change_info_maxsz + 1 + \
 154                                 nfs4_fattr_bitmap_maxsz + \
 155                                 decode_delegation_maxsz)
 156 #define encode_open_confirm_maxsz \
 157                                 (op_encode_hdr_maxsz + \
 158                                  encode_stateid_maxsz + 1)
 159 #define decode_open_confirm_maxsz \
 160                                 (op_decode_hdr_maxsz + \
 161                                  decode_stateid_maxsz)
 162 #define encode_open_downgrade_maxsz \
 163                                 (op_encode_hdr_maxsz + \
 164                                  encode_stateid_maxsz + 1 + \
 165                                  encode_share_access_maxsz)
 166 #define decode_open_downgrade_maxsz \
 167                                 (op_decode_hdr_maxsz + \
 168                                  decode_stateid_maxsz)
 169 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 170                                  1 + encode_stateid_maxsz)
 171 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 172                                  decode_stateid_maxsz)
 173 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 174                                  encode_stateid_maxsz + \
 175                                  encode_attrs_maxsz)
 176 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 177                                  nfs4_fattr_bitmap_maxsz)
 178 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 179                                  encode_stateid_maxsz + 3)
 180 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 181 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 182                                  2 + encode_verifier_maxsz + 5)
 183 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 184                                  decode_verifier_maxsz)
 185 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 186 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 187 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 188                                  encode_stateid_maxsz + 4)
 189 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 190                                  2 + decode_verifier_maxsz)
 191 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 192 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 193                                  decode_verifier_maxsz)
 194 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 195                                 nfs4_name_maxsz)
 196 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 197                                  decode_change_info_maxsz)
 198 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 199                                 2 * nfs4_name_maxsz)
 200 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 201                                  decode_change_info_maxsz + \
 202                                  decode_change_info_maxsz)
 203 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 204                                 nfs4_name_maxsz)
 205 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 206 #define encode_lockowner_maxsz  (7)
 207 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 208                                  7 + \
 209                                  1 + encode_stateid_maxsz + 1 + \
 210                                  encode_lockowner_maxsz)
 211 #define decode_lock_denied_maxsz \
 212                                 (8 + decode_lockowner_maxsz)
 213 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 214                                  decode_lock_denied_maxsz)
 215 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 216                                 encode_lockowner_maxsz)
 217 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 218                                  decode_lock_denied_maxsz)
 219 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 220                                  encode_stateid_maxsz + \
 221                                  4)
 222 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 223                                  decode_stateid_maxsz)
 224 #define encode_release_lockowner_maxsz \
 225                                 (op_encode_hdr_maxsz + \
 226                                  encode_lockowner_maxsz)
 227 #define decode_release_lockowner_maxsz \
 228                                 (op_decode_hdr_maxsz)
 229 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 230 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 231 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 232                                 1 + nfs4_name_maxsz + \
 233                                 1 + \
 234                                 nfs4_fattr_maxsz)
 235 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 236 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 237                                 1 + 2 + nfs4_name_maxsz + \
 238                                 encode_attrs_maxsz)
 239 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 240                                 decode_change_info_maxsz + \
 241                                 nfs4_fattr_bitmap_maxsz)
 242 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 243 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 244 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 245 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 246 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 247 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 248                                  nfs4_fattr_bitmap_maxsz + 1)
 249 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 250                                  encode_stateid_maxsz + 3)
 251 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 252 #define encode_fs_locations_maxsz \
 253                                 (encode_getattr_maxsz)
 254 #define decode_fs_locations_maxsz \
 255                                 (0)
 256
 257 #if defined(CONFIG_NFS_V4_1)
 258 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 259
 260 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 261                                 encode_verifier_maxsz + \
 262                                 1 /* co_ownerid.len */ + \
 263                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 264                                 1 /* flags */ + \
 265                                 1 /* spa_how */ + \
 266                                 0 /* SP4_NONE (for now) */ + \
 267                                 1 /* zero implemetation id array */)
 268 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 269                                 2 /* eir_clientid */ + \
 270                                 1 /* eir_sequenceid */ + \
 271                                 1 /* eir_flags */ + \
 272                                 1 /* spr_how */ + \
 273                                 0 /* SP4_NONE (for now) */ + \
 274                                 2 /* eir_server_owner.so_minor_id */ + \
 275                                 /* eir_server_owner.so_major_id<> */ \
 276                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 277                                 /* eir_server_scope<> */ \
 278                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 279                                 1 /* eir_server_impl_id array length */ + \
 280                                 0 /* ignored eir_server_impl_id contents */)
 281 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 282 #define decode_channel_attrs_maxsz  (6 + \
 283                                      1 /* ca_rdma_ird.len */ + \
 284                                      1 /* ca_rdma_ird */)
 285 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 286                                      2 /* csa_clientid */ + \
 287                                      1 /* csa_sequence */ + \
 288                                      1 /* csa_flags */ + \
 289                                      encode_channel_attrs_maxsz + \
 290                                      encode_channel_attrs_maxsz + \
 291                                      1 /* csa_cb_program */ + \
 292                                      1 /* csa_sec_parms.len (1) */ + \
 293                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 294                                      1 /* stamp */ + \
 295                                      1 /* machinename.len */ + \
 296                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 297                                      1 /* uid */ + \
 298                                      1 /* gid */ + \
 299                                      1 /* gids.len (0) */)
 300 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 301                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 302                                      1 /* csr_sequence */ + \
 303                                      1 /* csr_flags */ + \
 304                                      decode_channel_attrs_maxsz + \
 305                                      decode_channel_attrs_maxsz)
 306 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 307 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 308 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 309                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 310 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 311                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 312 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 313 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 314 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 315                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 316 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 317                                 1 /* layout type */ + \
 318                                 1 /* opaque devaddr4 length */ + \
 319                                   /* devaddr4 payload is read into page */ \
 320                                 1 /* notification bitmap length */ + \
 321                                 1 /* notification bitmap */)
 322 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 323                                 encode_stateid_maxsz)
 324 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 325                                 decode_stateid_maxsz + \
 326                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 327 #else /* CONFIG_NFS_V4_1 */
 328 #define encode_sequence_maxsz   0
 329 #define decode_sequence_maxsz   0
 330 #endif /* CONFIG_NFS_V4_1 */
 331
 332 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 333 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 334 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 335                                 encode_sequence_maxsz + \
 336                                 encode_putfh_maxsz + \
 337                                 encode_read_maxsz)
 338 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 339                                 decode_sequence_maxsz + \
 340                                 decode_putfh_maxsz + \
 341                                 decode_read_maxsz)
 342 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 343                                 encode_sequence_maxsz + \
 344                                 encode_putfh_maxsz + \
 345                                 encode_readlink_maxsz)
 346 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 347                                 decode_sequence_maxsz + \
 348                                 decode_putfh_maxsz + \
 349                                 decode_readlink_maxsz)
 350 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 351                                 encode_sequence_maxsz + \
 352                                 encode_putfh_maxsz + \
 353                                 encode_readdir_maxsz)
 354 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 355                                 decode_sequence_maxsz + \
 356                                 decode_putfh_maxsz + \
 357                                 decode_readdir_maxsz)
 358 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 359                                 encode_sequence_maxsz + \
 360                                 encode_putfh_maxsz + \
 361                                 encode_write_maxsz + \
 362                                 encode_getattr_maxsz)
 363 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 364                                 decode_sequence_maxsz + \
 365                                 decode_putfh_maxsz + \
 366                                 decode_write_maxsz + \
 367                                 decode_getattr_maxsz)
 368 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 369                                 encode_sequence_maxsz + \
 370                                 encode_putfh_maxsz + \
 371                                 encode_commit_maxsz + \
 372                                 encode_getattr_maxsz)
 373 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 374                                 decode_sequence_maxsz + \
 375                                 decode_putfh_maxsz + \
 376                                 decode_commit_maxsz + \
 377                                 decode_getattr_maxsz)
 378 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 379                                 encode_sequence_maxsz + \
 380                                 encode_putfh_maxsz + \
 381                                 encode_savefh_maxsz + \
 382                                 encode_open_maxsz + \
 383                                 encode_getfh_maxsz + \
 384                                 encode_getattr_maxsz + \
 385                                 encode_restorefh_maxsz + \
 386                                 encode_getattr_maxsz)
 387 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 388                                 decode_sequence_maxsz + \
 389                                 decode_putfh_maxsz + \
 390                                 decode_savefh_maxsz + \
 391                                 decode_open_maxsz + \
 392                                 decode_getfh_maxsz + \
 393                                 decode_getattr_maxsz + \
 394                                 decode_restorefh_maxsz + \
 395                                 decode_getattr_maxsz)
 396 #define NFS4_enc_open_confirm_sz \
 397                                 (compound_encode_hdr_maxsz + \
 398                                  encode_putfh_maxsz + \
 399                                  encode_open_confirm_maxsz)
 400 #define NFS4_dec_open_confirm_sz \
 401                                 (compound_decode_hdr_maxsz + \
 402                                  decode_putfh_maxsz + \
 403                                  decode_open_confirm_maxsz)
 404 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 405                                         encode_sequence_maxsz + \
 406                                         encode_putfh_maxsz + \
 407                                         encode_open_maxsz + \
 408                                         encode_getattr_maxsz)
 409 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 410                                         decode_sequence_maxsz + \
 411                                         decode_putfh_maxsz + \
 412                                         decode_open_maxsz + \
 413                                         decode_getattr_maxsz)
 414 #define NFS4_enc_open_downgrade_sz \
 415                                 (compound_encode_hdr_maxsz + \
 416                                  encode_sequence_maxsz + \
 417                                  encode_putfh_maxsz + \
 418                                  encode_open_downgrade_maxsz + \
 419                                  encode_getattr_maxsz)
 420 #define NFS4_dec_open_downgrade_sz \
 421                                 (compound_decode_hdr_maxsz + \
 422                                  decode_sequence_maxsz + \
 423                                  decode_putfh_maxsz + \
 424                                  decode_open_downgrade_maxsz + \
 425                                  decode_getattr_maxsz)
 426 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 427                                  encode_sequence_maxsz + \
 428                                  encode_putfh_maxsz + \
 429                                  encode_close_maxsz + \
 430                                  encode_getattr_maxsz)
 431 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 432                                  decode_sequence_maxsz + \
 433                                  decode_putfh_maxsz + \
 434                                  decode_close_maxsz + \
 435                                  decode_getattr_maxsz)
 436 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 437                                  encode_sequence_maxsz + \
 438                                  encode_putfh_maxsz + \
 439                                  encode_setattr_maxsz + \
 440                                  encode_getattr_maxsz)
 441 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 442                                  decode_sequence_maxsz + \
 443                                  decode_putfh_maxsz + \
 444                                  decode_setattr_maxsz + \
 445                                  decode_getattr_maxsz)
 446 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 447                                 encode_sequence_maxsz + \
 448                                 encode_putfh_maxsz + \
 449                                 encode_fsinfo_maxsz)
 450 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 451                                 decode_sequence_maxsz + \
 452                                 decode_putfh_maxsz + \
 453                                 decode_fsinfo_maxsz)
 454 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 455                                 encode_renew_maxsz)
 456 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 457                                 decode_renew_maxsz)
 458 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 459                                 encode_setclientid_maxsz)
 460 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 461                                 decode_setclientid_maxsz)
 462 #define NFS4_enc_setclientid_confirm_sz \
 463                                 (compound_encode_hdr_maxsz + \
 464                                 encode_setclientid_confirm_maxsz + \
 465                                 encode_putrootfh_maxsz + \
 466                                 encode_fsinfo_maxsz)
 467 #define NFS4_dec_setclientid_confirm_sz \
 468                                 (compound_decode_hdr_maxsz + \
 469                                 decode_setclientid_confirm_maxsz + \
 470                                 decode_putrootfh_maxsz + \
 471                                 decode_fsinfo_maxsz)
 472 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 473                                 encode_sequence_maxsz + \
 474                                 encode_putfh_maxsz + \
 475                                 encode_lock_maxsz)
 476 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 477                                 decode_sequence_maxsz + \
 478                                 decode_putfh_maxsz + \
 479                                 decode_lock_maxsz)
 480 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 481                                 encode_sequence_maxsz + \
 482                                 encode_putfh_maxsz + \
 483                                 encode_lockt_maxsz)
 484 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 485                                  decode_sequence_maxsz + \
 486                                  decode_putfh_maxsz + \
 487                                  decode_lockt_maxsz)
 488 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 489                                 encode_sequence_maxsz + \
 490                                 encode_putfh_maxsz + \
 491                                 encode_locku_maxsz)
 492 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 493                                 decode_sequence_maxsz + \
 494                                 decode_putfh_maxsz + \
 495                                 decode_locku_maxsz)
 496 #define NFS4_enc_release_lockowner_sz \
 497                                 (compound_encode_hdr_maxsz + \
 498                                  encode_lockowner_maxsz)
 499 #define NFS4_dec_release_lockowner_sz \
 500                                 (compound_decode_hdr_maxsz + \
 501                                  decode_lockowner_maxsz)
 502 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 503                                 encode_sequence_maxsz + \
 504                                 encode_putfh_maxsz + \
 505                                 encode_access_maxsz + \
 506                                 encode_getattr_maxsz)
 507 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putfh_maxsz + \
 510                                 decode_access_maxsz + \
 511                                 decode_getattr_maxsz)
 512 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 513                                 encode_sequence_maxsz + \
 514                                 encode_putfh_maxsz + \
 515                                 encode_getattr_maxsz)
 516 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 517                                 decode_sequence_maxsz + \
 518                                 decode_putfh_maxsz + \
 519                                 decode_getattr_maxsz)
 520 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 521                                 encode_sequence_maxsz + \
 522                                 encode_putfh_maxsz + \
 523                                 encode_lookup_maxsz + \
 524                                 encode_getattr_maxsz + \
 525                                 encode_getfh_maxsz)
 526 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 527                                 decode_sequence_maxsz + \
 528                                 decode_putfh_maxsz + \
 529                                 decode_lookup_maxsz + \
 530                                 decode_getattr_maxsz + \
 531                                 decode_getfh_maxsz)
 532 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 533                                 encode_sequence_maxsz + \
 534                                 encode_putrootfh_maxsz + \
 535                                 encode_getattr_maxsz + \
 536                                 encode_getfh_maxsz)
 537 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 538                                 decode_sequence_maxsz + \
 539                                 decode_putrootfh_maxsz + \
 540                                 decode_getattr_maxsz + \
 541                                 decode_getfh_maxsz)
 542 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 543                                 encode_sequence_maxsz + \
 544                                 encode_putfh_maxsz + \
 545                                 encode_remove_maxsz + \
 546                                 encode_getattr_maxsz)
 547 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 548                                 decode_sequence_maxsz + \
 549                                 decode_putfh_maxsz + \
 550                                 decode_remove_maxsz + \
 551                                 decode_getattr_maxsz)
 552 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 553                                 encode_sequence_maxsz + \
 554                                 encode_putfh_maxsz + \
 555                                 encode_savefh_maxsz + \
 556                                 encode_putfh_maxsz + \
 557                                 encode_rename_maxsz + \
 558                                 encode_getattr_maxsz + \
 559                                 encode_restorefh_maxsz + \
 560                                 encode_getattr_maxsz)
 561 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 562                                 decode_sequence_maxsz + \
 563                                 decode_putfh_maxsz + \
 564                                 decode_savefh_maxsz + \
 565                                 decode_putfh_maxsz + \
 566                                 decode_rename_maxsz + \
 567                                 decode_getattr_maxsz + \
 568                                 decode_restorefh_maxsz + \
 569                                 decode_getattr_maxsz)
 570 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 571                                 encode_sequence_maxsz + \
 572                                 encode_putfh_maxsz + \
 573                                 encode_savefh_maxsz + \
 574                                 encode_putfh_maxsz + \
 575                                 encode_link_maxsz + \
 576                                 decode_getattr_maxsz + \
 577                                 encode_restorefh_maxsz + \
 578                                 decode_getattr_maxsz)
 579 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 580                                 decode_sequence_maxsz + \
 581                                 decode_putfh_maxsz + \
 582                                 decode_savefh_maxsz + \
 583                                 decode_putfh_maxsz + \
 584                                 decode_link_maxsz + \
 585                                 decode_getattr_maxsz + \
 586                                 decode_restorefh_maxsz + \
 587                                 decode_getattr_maxsz)
 588 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 589                                 encode_sequence_maxsz + \
 590                                 encode_putfh_maxsz + \
 591                                 encode_symlink_maxsz + \
 592                                 encode_getattr_maxsz + \
 593                                 encode_getfh_maxsz)
 594 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_symlink_maxsz + \
 598                                 decode_getattr_maxsz + \
 599                                 decode_getfh_maxsz)
 600 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 601                                 encode_sequence_maxsz + \
 602                                 encode_putfh_maxsz + \
 603                                 encode_savefh_maxsz + \
 604                                 encode_create_maxsz + \
 605                                 encode_getfh_maxsz + \
 606                                 encode_getattr_maxsz + \
 607                                 encode_restorefh_maxsz + \
 608                                 encode_getattr_maxsz)
 609 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_savefh_maxsz + \
 613                                 decode_create_maxsz + \
 614                                 decode_getfh_maxsz + \
 615                                 decode_getattr_maxsz + \
 616                                 decode_restorefh_maxsz + \
 617                                 decode_getattr_maxsz)
 618 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 619                                 encode_sequence_maxsz + \
 620                                 encode_putfh_maxsz + \
 621                                 encode_getattr_maxsz)
 622 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 623                                 decode_sequence_maxsz + \
 624                                 decode_putfh_maxsz + \
 625                                 decode_getattr_maxsz)
 626 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 627                                 encode_sequence_maxsz + \
 628                                 encode_putfh_maxsz + \
 629                                 encode_statfs_maxsz)
 630 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 631                                 decode_sequence_maxsz + \
 632                                 decode_putfh_maxsz + \
 633                                 decode_statfs_maxsz)
 634 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 635                                 encode_sequence_maxsz + \
 636                                 encode_putfh_maxsz + \
 637                                 encode_getattr_maxsz)
 638 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 639                                 decode_sequence_maxsz + \
 640                                 decode_putfh_maxsz + \
 641                                 decode_getattr_maxsz)
 642 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 643                                 encode_sequence_maxsz + \
 644                                 encode_putfh_maxsz + \
 645                                 encode_delegreturn_maxsz + \
 646                                 encode_getattr_maxsz)
 647 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 648                                 decode_sequence_maxsz + \
 649                                 decode_delegreturn_maxsz + \
 650                                 decode_getattr_maxsz)
 651 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 652                                 encode_sequence_maxsz + \
 653                                 encode_putfh_maxsz + \
 654                                 encode_getacl_maxsz)
 655 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 656                                 decode_sequence_maxsz + \
 657                                 decode_putfh_maxsz + \
 658                                 decode_getacl_maxsz)
 659 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 660                                 encode_sequence_maxsz + \
 661                                 encode_putfh_maxsz + \
 662                                 encode_setacl_maxsz)
 663 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 664                                 decode_sequence_maxsz + \
 665                                 decode_putfh_maxsz + \
 666                                 decode_setacl_maxsz)
 667 #define NFS4_enc_fs_locations_sz \
 668                                 (compound_encode_hdr_maxsz + \
 669                                  encode_sequence_maxsz + \
 670                                  encode_putfh_maxsz + \
 671                                  encode_lookup_maxsz + \
 672                                  encode_fs_locations_maxsz)
 673 #define NFS4_dec_fs_locations_sz \
 674                                 (compound_decode_hdr_maxsz + \
 675                                  decode_sequence_maxsz + \
 676                                  decode_putfh_maxsz + \
 677                                  decode_lookup_maxsz + \
 678                                  decode_fs_locations_maxsz)
 679 #if defined(CONFIG_NFS_V4_1)
 680 #define NFS4_enc_exchange_id_sz \
 681                                 (compound_encode_hdr_maxsz + \
 682                                  encode_exchange_id_maxsz)
 683 #define NFS4_dec_exchange_id_sz \
 684                                 (compound_decode_hdr_maxsz + \
 685                                  decode_exchange_id_maxsz)
 686 #define NFS4_enc_create_session_sz \
 687                                 (compound_encode_hdr_maxsz + \
 688                                  encode_create_session_maxsz)
 689 #define NFS4_dec_create_session_sz \
 690                                 (compound_decode_hdr_maxsz + \
 691                                  decode_create_session_maxsz)
 692 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 693                                          encode_destroy_session_maxsz)
 694 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 695                                          decode_destroy_session_maxsz)
 696 #define NFS4_enc_sequence_sz \
 697                                 (compound_decode_hdr_maxsz + \
 698                                  encode_sequence_maxsz)
 699 #define NFS4_dec_sequence_sz \
 700                                 (compound_decode_hdr_maxsz + \
 701                                  decode_sequence_maxsz)
 702 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 703                                          encode_sequence_maxsz + \
 704                                          encode_putrootfh_maxsz + \
 705                                          encode_fsinfo_maxsz)
 706 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 707                                          decode_sequence_maxsz + \
 708                                          decode_putrootfh_maxsz + \
 709                                          decode_fsinfo_maxsz)
 710 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 711                                          encode_sequence_maxsz + \
 712                                          encode_reclaim_complete_maxsz)
 713 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 714                                          decode_sequence_maxsz + \
 715                                          decode_reclaim_complete_maxsz)
 716 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 717                                 encode_sequence_maxsz +\
 718                                 encode_getdeviceinfo_maxsz)
 719 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 720                                 decode_sequence_maxsz + \
 721                                 decode_getdeviceinfo_maxsz)
 722 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 723                                 encode_sequence_maxsz + \
 724                                 encode_putfh_maxsz +        \
 725                                 encode_layoutget_maxsz)
 726 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 727                                 decode_sequence_maxsz + \
 728                                 decode_putfh_maxsz +        \
 729                                 decode_layoutget_maxsz)
 730
 731 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 732                                       compound_encode_hdr_maxsz +
 733                                       encode_sequence_maxsz +
 734                                       encode_putfh_maxsz +
 735                                       encode_getattr_maxsz) *
 736                                      XDR_UNIT);
 737
 738 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 739                                      compound_decode_hdr_maxsz +
 740                                      decode_sequence_maxsz +
 741                                      decode_putfh_maxsz) *
 742                                     XDR_UNIT);
 743 #endif /* CONFIG_NFS_V4_1 */
 744
 745 static const umode_t nfs_type2fmt[] = {
 746         [NF4BAD] = 0,
 747         [NF4REG] = S_IFREG,
 748         [NF4DIR] = S_IFDIR,
 749         [NF4BLK] = S_IFBLK,
 750         [NF4CHR] = S_IFCHR,
 751         [NF4LNK] = S_IFLNK,
 752         [NF4SOCK] = S_IFSOCK,
 753         [NF4FIFO] = S_IFIFO,
 754         [NF4ATTRDIR] = 0,
 755         [NF4NAMEDATTR] = 0,
 756 };
 757
 758 struct compound_hdr {
 759         int32_t         status;
 760         uint32_t        nops;
 761         __be32 *        nops_p;
 762         uint32_t        taglen;
 763         char *          tag;
 764         uint32_t        replen;         /* expected reply words */
 765         u32             minorversion;
 766 };
 767
 768 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 769 {
 770         __be32 *p = xdr_reserve_space(xdr, nbytes);
 771         BUG_ON(!p);
 772         return p;
 773 }
 774
 775 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 776 {
 777         __be32 *p;
 778
 779         p = xdr_reserve_space(xdr, 4 + len);
 780         BUG_ON(p == NULL);
 781         xdr_encode_opaque(p, str, len);
 782 }
 783
 784 static void encode_compound_hdr(struct xdr_stream *xdr,
 785                                 struct rpc_rqst *req,
 786                                 struct compound_hdr *hdr)
 787 {
 788         __be32 *p;
 789         struct rpc_auth *auth = req->rq_cred->cr_auth;
 790
 791         /* initialize running count of expected bytes in reply.
 792          * NOTE: the replied tag SHOULD be the same is the one sent,
 793          * but this is not required as a MUST for the server to do so. */
 794         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 795
 796         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 797         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 798         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 799         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 800         *p++ = cpu_to_be32(hdr->minorversion);
 801         hdr->nops_p = p;
 802         *p = cpu_to_be32(hdr->nops);
 803 }
 804
 805 static void encode_nops(struct compound_hdr *hdr)
 806 {
 807         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 808         *hdr->nops_p = htonl(hdr->nops);
 809 }
 810
 811 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 812 {
 813         __be32 *p;
 814
 815         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 816         BUG_ON(p == NULL);
 817         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 818 }
 819
 820 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 821 {
 822         char owner_name[IDMAP_NAMESZ];
 823         char owner_group[IDMAP_NAMESZ];
 824         int owner_namelen = 0;
 825         int owner_grouplen = 0;
 826         __be32 *p;
 827         __be32 *q;
 828         int len;
 829         uint32_t bmval0 = 0;
 830         uint32_t bmval1 = 0;
 831
 832         /*
 833          * We reserve enough space to write the entire attribute buffer at once.
 834          * In the worst-case, this would be
 835          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 836          *          = 36 bytes, plus any contribution from variable-length fields
 837          *            such as owner/group.
 838          */
 839         len = 16;
 840
 841         /* Sigh */
 842         if (iap->ia_valid & ATTR_SIZE)
 843                 len += 8;
 844         if (iap->ia_valid & ATTR_MODE)
 845                 len += 4;
 846         if (iap->ia_valid & ATTR_UID) {
 847                 owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 848                 if (owner_namelen < 0) {
 849                         dprintk("nfs: couldn't resolve uid %d to string\n",
 850                                         iap->ia_uid);
 851                         /* XXX */
 852                         strcpy(owner_name, "nobody");
 853                         owner_namelen = sizeof("nobody") - 1;
 854                         /* goto out; */
 855                 }
 856                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 857         }
 858         if (iap->ia_valid & ATTR_GID) {
 859                 owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 860                 if (owner_grouplen < 0) {
 861                         dprintk("nfs: couldn't resolve gid %d to string\n",
 862                                         iap->ia_gid);
 863                         strcpy(owner_group, "nobody");
 864                         owner_grouplen = sizeof("nobody") - 1;
 865                         /* goto out; */
 866                 }
 867                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 868         }
 869         if (iap->ia_valid & ATTR_ATIME_SET)
 870                 len += 16;
 871         else if (iap->ia_valid & ATTR_ATIME)
 872                 len += 4;
 873         if (iap->ia_valid & ATTR_MTIME_SET)
 874                 len += 16;
 875         else if (iap->ia_valid & ATTR_MTIME)
 876                 len += 4;
 877         p = reserve_space(xdr, len);
 878
 879         /*
 880          * We write the bitmap length now, but leave the bitmap and the attribute
 881          * buffer length to be backfilled at the end of this routine.
 882          */
 883         *p++ = cpu_to_be32(2);
 884         q = p;
 885         p += 3;
 886
 887         if (iap->ia_valid & ATTR_SIZE) {
 888                 bmval0 |= FATTR4_WORD0_SIZE;
 889                 p = xdr_encode_hyper(p, iap->ia_size);
 890         }
 891         if (iap->ia_valid & ATTR_MODE) {
 892                 bmval1 |= FATTR4_WORD1_MODE;
 893                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 894         }
 895         if (iap->ia_valid & ATTR_UID) {
 896                 bmval1 |= FATTR4_WORD1_OWNER;
 897                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 898         }
 899         if (iap->ia_valid & ATTR_GID) {
 900                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 901                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 902         }
 903         if (iap->ia_valid & ATTR_ATIME_SET) {
 904                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 905                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 906                 *p++ = cpu_to_be32(0);
 907                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 908                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 909         }
 910         else if (iap->ia_valid & ATTR_ATIME) {
 911                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 912                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 913         }
 914         if (iap->ia_valid & ATTR_MTIME_SET) {
 915                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 916                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 917                 *p++ = cpu_to_be32(0);
 918                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 919                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 920         }
 921         else if (iap->ia_valid & ATTR_MTIME) {
 922                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 923                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 924         }
 925
 926         /*
 927          * Now we backfill the bitmap and the attribute buffer length.
 928          */
 929         if (len != ((char *)p - (char *)q) + 4) {
 930                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 931                                 len, ((char *)p - (char *)q) + 4);
 932                 BUG();
 933         }
 934         len = (char *)p - (char *)q - 12;
 935         *q++ = htonl(bmval0);
 936         *q++ = htonl(bmval1);
 937         *q = htonl(len);
 938
 939 /* out: */
 940 }
 941
 942 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 943 {
 944         __be32 *p;
 945
 946         p = reserve_space(xdr, 8);
 947         *p++ = cpu_to_be32(OP_ACCESS);
 948         *p = cpu_to_be32(access);
 949         hdr->nops++;
 950         hdr->replen += decode_access_maxsz;
 951 }
 952
 953 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 954 {
 955         __be32 *p;
 956
 957         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 958         *p++ = cpu_to_be32(OP_CLOSE);
 959         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 960         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 961         hdr->nops++;
 962         hdr->replen += decode_close_maxsz;
 963 }
 964
 965 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
 966 {
 967         __be32 *p;
 968
 969         p = reserve_space(xdr, 16);
 970         *p++ = cpu_to_be32(OP_COMMIT);
 971         p = xdr_encode_hyper(p, args->offset);
 972         *p = cpu_to_be32(args->count);
 973         hdr->nops++;
 974         hdr->replen += decode_commit_maxsz;
 975 }
 976
 977 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
 978 {
 979         __be32 *p;
 980
 981         p = reserve_space(xdr, 8);
 982         *p++ = cpu_to_be32(OP_CREATE);
 983         *p = cpu_to_be32(create->ftype);
 984
 985         switch (create->ftype) {
 986         case NF4LNK:
 987                 p = reserve_space(xdr, 4);
 988                 *p = cpu_to_be32(create->u.symlink.len);
 989                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
 990                 break;
 991
 992         case NF4BLK: case NF4CHR:
 993                 p = reserve_space(xdr, 8);
 994                 *p++ = cpu_to_be32(create->u.device.specdata1);
 995                 *p = cpu_to_be32(create->u.device.specdata2);
 996                 break;
 997
 998         default:
 999                 break;
1000         }
1001
1002         encode_string(xdr, create->name->len, create->name->name);
1003         hdr->nops++;
1004         hdr->replen += decode_create_maxsz;
1005
1006         encode_attrs(xdr, create->attrs, create->server);
1007 }
1008
1009 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1010 {
1011         __be32 *p;
1012
1013         p = reserve_space(xdr, 12);
1014         *p++ = cpu_to_be32(OP_GETATTR);
1015         *p++ = cpu_to_be32(1);
1016         *p = cpu_to_be32(bitmap);
1017         hdr->nops++;
1018         hdr->replen += decode_getattr_maxsz;
1019 }
1020
1021 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1022 {
1023         __be32 *p;
1024
1025         p = reserve_space(xdr, 16);
1026         *p++ = cpu_to_be32(OP_GETATTR);
1027         *p++ = cpu_to_be32(2);
1028         *p++ = cpu_to_be32(bm0);
1029         *p = cpu_to_be32(bm1);
1030         hdr->nops++;
1031         hdr->replen += decode_getattr_maxsz;
1032 }
1033
1034 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1035 {
1036         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1037                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1038 }
1039
1040 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1041 {
1042         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1043                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1044 }
1045
1046 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1047 {
1048         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1049                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1050 }
1051
1052 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1053 {
1054         __be32 *p;
1055
1056         p = reserve_space(xdr, 4);
1057         *p = cpu_to_be32(OP_GETFH);
1058         hdr->nops++;
1059         hdr->replen += decode_getfh_maxsz;
1060 }
1061
1062 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1063 {
1064         __be32 *p;
1065
1066         p = reserve_space(xdr, 8 + name->len);
1067         *p++ = cpu_to_be32(OP_LINK);
1068         xdr_encode_opaque(p, name->name, name->len);
1069         hdr->nops++;
1070         hdr->replen += decode_link_maxsz;
1071 }
1072
1073 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1074 {
1075         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1076                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1077         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1078 }
1079
1080 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1081 {
1082         if (fl->fl_end == OFFSET_MAX)
1083                 return ~(uint64_t)0;
1084         return fl->fl_end - fl->fl_start + 1;
1085 }
1086
1087 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1088 {
1089         __be32 *p;
1090
1091         p = reserve_space(xdr, 28);
1092         p = xdr_encode_hyper(p, lowner->clientid);
1093         *p++ = cpu_to_be32(16);
1094         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1095         xdr_encode_hyper(p, lowner->id);
1096 }
1097
1098 /*
1099  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1100  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1101  */
1102 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1103 {
1104         __be32 *p;
1105
1106         p = reserve_space(xdr, 32);
1107         *p++ = cpu_to_be32(OP_LOCK);
1108         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1109         *p++ = cpu_to_be32(args->reclaim);
1110         p = xdr_encode_hyper(p, args->fl->fl_start);
1111         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1112         *p = cpu_to_be32(args->new_lock_owner);
1113         if (args->new_lock_owner){
1114                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1115                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1116                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1117                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1118                 encode_lockowner(xdr, &args->lock_owner);
1119         }
1120         else {
1121                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1122                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1123                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1124         }
1125         hdr->nops++;
1126         hdr->replen += decode_lock_maxsz;
1127 }
1128
1129 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1130 {
1131         __be32 *p;
1132
1133         p = reserve_space(xdr, 24);
1134         *p++ = cpu_to_be32(OP_LOCKT);
1135         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1136         p = xdr_encode_hyper(p, args->fl->fl_start);
1137         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1138         encode_lockowner(xdr, &args->lock_owner);
1139         hdr->nops++;
1140         hdr->replen += decode_lockt_maxsz;
1141 }
1142
1143 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1144 {
1145         __be32 *p;
1146
1147         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1148         *p++ = cpu_to_be32(OP_LOCKU);
1149         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1150         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1151         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1152         p = xdr_encode_hyper(p, args->fl->fl_start);
1153         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1154         hdr->nops++;
1155         hdr->replen += decode_locku_maxsz;
1156 }
1157
1158 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1159 {
1160         __be32 *p;
1161
1162         p = reserve_space(xdr, 4);
1163         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1164         encode_lockowner(xdr, lowner);
1165         hdr->nops++;
1166         hdr->replen += decode_release_lockowner_maxsz;
1167 }
1168
1169 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1170 {
1171         int len = name->len;
1172         __be32 *p;
1173
1174         p = reserve_space(xdr, 8 + len);
1175         *p++ = cpu_to_be32(OP_LOOKUP);
1176         xdr_encode_opaque(p, name->name, len);
1177         hdr->nops++;
1178         hdr->replen += decode_lookup_maxsz;
1179 }
1180
1181 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1182 {
1183         __be32 *p;
1184
1185         p = reserve_space(xdr, 8);
1186         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1187         case FMODE_READ:
1188                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1189                 break;
1190         case FMODE_WRITE:
1191                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1192                 break;
1193         case FMODE_READ|FMODE_WRITE:
1194                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1195                 break;
1196         default:
1197                 *p++ = cpu_to_be32(0);
1198         }
1199         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1200 }
1201
1202 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1203 {
1204         __be32 *p;
1205  /*
1206  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1207  * owner 4 = 32
1208  */
1209         p = reserve_space(xdr, 8);
1210         *p++ = cpu_to_be32(OP_OPEN);
1211         *p = cpu_to_be32(arg->seqid->sequence->counter);
1212         encode_share_access(xdr, arg->fmode);
1213         p = reserve_space(xdr, 28);
1214         p = xdr_encode_hyper(p, arg->clientid);
1215         *p++ = cpu_to_be32(16);
1216         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1217         xdr_encode_hyper(p, arg->id);
1218 }
1219
1220 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1221 {
1222         __be32 *p;
1223         struct nfs_client *clp;
1224
1225         p = reserve_space(xdr, 4);
1226         switch(arg->open_flags & O_EXCL) {
1227         case 0:
1228                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1229                 encode_attrs(xdr, arg->u.attrs, arg->server);
1230                 break;
1231         default:
1232                 clp = arg->server->nfs_client;
1233                 if (clp->cl_mvops->minor_version > 0) {
1234                         if (nfs4_has_persistent_session(clp)) {
1235                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1236                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1237                         } else {
1238                                 struct iattr dummy;
1239
1240                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1241                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1242                                 dummy.ia_valid = 0;
1243                                 encode_attrs(xdr, &dummy, arg->server);
1244                         }
1245                 } else {
1246                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1247                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1248                 }
1249         }
1250 }
1251
1252 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1253 {
1254         __be32 *p;
1255
1256         p = reserve_space(xdr, 4);
1257         switch (arg->open_flags & O_CREAT) {
1258         case 0:
1259                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1260                 break;
1261         default:
1262                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1263                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1264                 encode_createmode(xdr, arg);
1265         }
1266 }
1267
1268 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1269 {
1270         __be32 *p;
1271
1272         p = reserve_space(xdr, 4);
1273         switch (delegation_type) {
1274         case 0:
1275                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1276                 break;
1277         case FMODE_READ:
1278                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1279                 break;
1280         case FMODE_WRITE|FMODE_READ:
1281                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1282                 break;
1283         default:
1284                 BUG();
1285         }
1286 }
1287
1288 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1289 {
1290         __be32 *p;
1291
1292         p = reserve_space(xdr, 4);
1293         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1294         encode_string(xdr, name->len, name->name);
1295 }
1296
1297 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1298 {
1299         __be32 *p;
1300
1301         p = reserve_space(xdr, 4);
1302         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1303         encode_delegation_type(xdr, type);
1304 }
1305
1306 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1307 {
1308         __be32 *p;
1309
1310         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1311         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1312         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1313         encode_string(xdr, name->len, name->name);
1314 }
1315
1316 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1317 {
1318         encode_openhdr(xdr, arg);
1319         encode_opentype(xdr, arg);
1320         switch (arg->claim) {
1321         case NFS4_OPEN_CLAIM_NULL:
1322                 encode_claim_null(xdr, arg->name);
1323                 break;
1324         case NFS4_OPEN_CLAIM_PREVIOUS:
1325                 encode_claim_previous(xdr, arg->u.delegation_type);
1326                 break;
1327         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1328                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1329                 break;
1330         default:
1331                 BUG();
1332         }
1333         hdr->nops++;
1334         hdr->replen += decode_open_maxsz;
1335 }
1336
1337 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1338 {
1339         __be32 *p;
1340
1341         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1342         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1343         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1344         *p = cpu_to_be32(arg->seqid->sequence->counter);
1345         hdr->nops++;
1346         hdr->replen += decode_open_confirm_maxsz;
1347 }
1348
1349 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1350 {
1351         __be32 *p;
1352
1353         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1354         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1355         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1356         *p = cpu_to_be32(arg->seqid->sequence->counter);
1357         encode_share_access(xdr, arg->fmode);
1358         hdr->nops++;
1359         hdr->replen += decode_open_downgrade_maxsz;
1360 }
1361
1362 static void
1363 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1364 {
1365         int len = fh->size;
1366         __be32 *p;
1367
1368         p = reserve_space(xdr, 8 + len);
1369         *p++ = cpu_to_be32(OP_PUTFH);
1370         xdr_encode_opaque(p, fh->data, len);
1371         hdr->nops++;
1372         hdr->replen += decode_putfh_maxsz;
1373 }
1374
1375 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1376 {
1377         __be32 *p;
1378
1379         p = reserve_space(xdr, 4);
1380         *p = cpu_to_be32(OP_PUTROOTFH);
1381         hdr->nops++;
1382         hdr->replen += decode_putrootfh_maxsz;
1383 }
1384
1385 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx)
1386 {
1387         nfs4_stateid stateid;
1388         __be32 *p;
1389
1390         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1391         if (ctx->state != NULL) {
1392                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1393                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1394         } else
1395                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1396 }
1397
1398 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1399 {
1400         __be32 *p;
1401
1402         p = reserve_space(xdr, 4);
1403         *p = cpu_to_be32(OP_READ);
1404
1405         encode_stateid(xdr, args->context, args->lock_context);
1406
1407         p = reserve_space(xdr, 12);
1408         p = xdr_encode_hyper(p, args->offset);
1409         *p = cpu_to_be32(args->count);
1410         hdr->nops++;
1411         hdr->replen += decode_read_maxsz;
1412 }
1413
1414 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1415 {
1416         uint32_t attrs[2] = {0, 0};
1417         uint32_t dircount = readdir->count >> 1;
1418         __be32 *p;
1419
1420         if (readdir->plus) {
1421                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1422                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1423                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1424                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1425                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1426                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1427                 dircount >>= 1;
1428         }
1429         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1430         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1431         /* Switch to mounted_on_fileid if the server supports it */
1432         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1433                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1434         else
1435                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1436
1437         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1438         *p++ = cpu_to_be32(OP_READDIR);
1439         p = xdr_encode_hyper(p, readdir->cookie);
1440         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1441         *p++ = cpu_to_be32(dircount);
1442         *p++ = cpu_to_be32(readdir->count);
1443         *p++ = cpu_to_be32(2);
1444
1445         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1446         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1447         hdr->nops++;
1448         hdr->replen += decode_readdir_maxsz;
1449         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1450                         __func__,
1451                         (unsigned long long)readdir->cookie,
1452                         ((u32 *)readdir->verifier.data)[0],
1453                         ((u32 *)readdir->verifier.data)[1],
1454                         attrs[0] & readdir->bitmask[0],
1455                         attrs[1] & readdir->bitmask[1]);
1456 }
1457
1458 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1459 {
1460         __be32 *p;
1461
1462         p = reserve_space(xdr, 4);
1463         *p = cpu_to_be32(OP_READLINK);
1464         hdr->nops++;
1465         hdr->replen += decode_readlink_maxsz;
1466 }
1467
1468 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1469 {
1470         __be32 *p;
1471
1472         p = reserve_space(xdr, 8 + name->len);
1473         *p++ = cpu_to_be32(OP_REMOVE);
1474         xdr_encode_opaque(p, name->name, name->len);
1475         hdr->nops++;
1476         hdr->replen += decode_remove_maxsz;
1477 }
1478
1479 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1480 {
1481         __be32 *p;
1482
1483         p = reserve_space(xdr, 4);
1484         *p = cpu_to_be32(OP_RENAME);
1485         encode_string(xdr, oldname->len, oldname->name);
1486         encode_string(xdr, newname->len, newname->name);
1487         hdr->nops++;
1488         hdr->replen += decode_rename_maxsz;
1489 }
1490
1491 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1492 {
1493         __be32 *p;
1494
1495         p = reserve_space(xdr, 12);
1496         *p++ = cpu_to_be32(OP_RENEW);
1497         xdr_encode_hyper(p, client_stateid->cl_clientid);
1498         hdr->nops++;
1499         hdr->replen += decode_renew_maxsz;
1500 }
1501
1502 static void
1503 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1504 {
1505         __be32 *p;
1506
1507         p = reserve_space(xdr, 4);
1508         *p = cpu_to_be32(OP_RESTOREFH);
1509         hdr->nops++;
1510         hdr->replen += decode_restorefh_maxsz;
1511 }
1512
1513 static void
1514 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1515 {
1516         __be32 *p;
1517
1518         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1519         *p++ = cpu_to_be32(OP_SETATTR);
1520         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1521         p = reserve_space(xdr, 2*4);
1522         *p++ = cpu_to_be32(1);
1523         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1524         BUG_ON(arg->acl_len % 4);
1525         p = reserve_space(xdr, 4);
1526         *p = cpu_to_be32(arg->acl_len);
1527         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1528         hdr->nops++;
1529         hdr->replen += decode_setacl_maxsz;
1530 }
1531
1532 static void
1533 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1534 {
1535         __be32 *p;
1536
1537         p = reserve_space(xdr, 4);
1538         *p = cpu_to_be32(OP_SAVEFH);
1539         hdr->nops++;
1540         hdr->replen += decode_savefh_maxsz;
1541 }
1542
1543 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1544 {
1545         __be32 *p;
1546
1547         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1548         *p++ = cpu_to_be32(OP_SETATTR);
1549         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1550         hdr->nops++;
1551         hdr->replen += decode_setattr_maxsz;
1552         encode_attrs(xdr, arg->iap, server);
1553 }
1554
1555 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1556 {
1557         __be32 *p;
1558
1559         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1560         *p++ = cpu_to_be32(OP_SETCLIENTID);
1561         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1562
1563         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1564         p = reserve_space(xdr, 4);
1565         *p = cpu_to_be32(setclientid->sc_prog);
1566         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1567         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1568         p = reserve_space(xdr, 4);
1569         *p = cpu_to_be32(setclientid->sc_cb_ident);
1570         hdr->nops++;
1571         hdr->replen += decode_setclientid_maxsz;
1572 }
1573
1574 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1575 {
1576         __be32 *p;
1577
1578         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1579         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1580         p = xdr_encode_hyper(p, arg->clientid);
1581         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1582         hdr->nops++;
1583         hdr->replen += decode_setclientid_confirm_maxsz;
1584 }
1585
1586 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1587 {
1588         __be32 *p;
1589
1590         p = reserve_space(xdr, 4);
1591         *p = cpu_to_be32(OP_WRITE);
1592
1593         encode_stateid(xdr, args->context, args->lock_context);
1594
1595         p = reserve_space(xdr, 16);
1596         p = xdr_encode_hyper(p, args->offset);
1597         *p++ = cpu_to_be32(args->stable);
1598         *p = cpu_to_be32(args->count);
1599
1600         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1601         hdr->nops++;
1602         hdr->replen += decode_write_maxsz;
1603 }
1604
1605 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1606 {
1607         __be32 *p;
1608
1609         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1610
1611         *p++ = cpu_to_be32(OP_DELEGRETURN);
1612         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1613         hdr->nops++;
1614         hdr->replen += decode_delegreturn_maxsz;
1615 }
1616
1617 #if defined(CONFIG_NFS_V4_1)
1618 /* NFSv4.1 operations */
1619 static void encode_exchange_id(struct xdr_stream *xdr,
1620                                struct nfs41_exchange_id_args *args,
1621                                struct compound_hdr *hdr)
1622 {
1623         __be32 *p;
1624
1625         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1626         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1627         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1628
1629         encode_string(xdr, args->id_len, args->id);
1630
1631         p = reserve_space(xdr, 12);
1632         *p++ = cpu_to_be32(args->flags);
1633         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1634         *p = cpu_to_be32(0);    /* zero length implementation id array */
1635         hdr->nops++;
1636         hdr->replen += decode_exchange_id_maxsz;
1637 }
1638
1639 static void encode_create_session(struct xdr_stream *xdr,
1640                                   struct nfs41_create_session_args *args,
1641                                   struct compound_hdr *hdr)
1642 {
1643         __be32 *p;
1644         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1645         uint32_t len;
1646         struct nfs_client *clp = args->client;
1647         u32 max_resp_sz_cached;
1648
1649         /*
1650          * Assumes OPEN is the biggest non-idempotent compound.
1651          * 2 is the verifier.
1652          */
1653         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1654                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1655
1656         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1657                         clp->cl_ipaddr);
1658
1659         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1660         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1661         p = xdr_encode_hyper(p, clp->cl_ex_clid);
1662         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1663         *p++ = cpu_to_be32(args->flags);                        /*flags */
1664
1665         /* Fore Channel */
1666         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1667         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1668         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1669         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1670         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1671         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1672         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1673
1674         /* Back Channel */
1675         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1676         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1677         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1678         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1679         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1680         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1681         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1682
1683         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1684         *p++ = cpu_to_be32(1);
1685         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1686
1687         /* authsys_parms rfc1831 */
1688         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1689         p = xdr_encode_opaque(p, machine_name, len);
1690         *p++ = cpu_to_be32(0);                          /* UID */
1691         *p++ = cpu_to_be32(0);                          /* GID */
1692         *p = cpu_to_be32(0);                            /* No more gids */
1693         hdr->nops++;
1694         hdr->replen += decode_create_session_maxsz;
1695 }
1696
1697 static void encode_destroy_session(struct xdr_stream *xdr,
1698                                    struct nfs4_session *session,
1699                                    struct compound_hdr *hdr)
1700 {
1701         __be32 *p;
1702         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1703         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1704         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1705         hdr->nops++;
1706         hdr->replen += decode_destroy_session_maxsz;
1707 }
1708
1709 static void encode_reclaim_complete(struct xdr_stream *xdr,
1710                                     struct nfs41_reclaim_complete_args *args,
1711                                     struct compound_hdr *hdr)
1712 {
1713         __be32 *p;
1714
1715         p = reserve_space(xdr, 8);
1716         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1717         *p++ = cpu_to_be32(args->one_fs);
1718         hdr->nops++;
1719         hdr->replen += decode_reclaim_complete_maxsz;
1720 }
1721 #endif /* CONFIG_NFS_V4_1 */
1722
1723 static void encode_sequence(struct xdr_stream *xdr,
1724                             const struct nfs4_sequence_args *args,
1725                             struct compound_hdr *hdr)
1726 {
1727 #if defined(CONFIG_NFS_V4_1)
1728         struct nfs4_session *session = args->sa_session;
1729         struct nfs4_slot_table *tp;
1730         struct nfs4_slot *slot;
1731         __be32 *p;
1732
1733         if (!session)
1734                 return;
1735
1736         tp = &session->fc_slot_table;
1737
1738         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1739         slot = tp->slots + args->sa_slotid;
1740
1741         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1742         *p++ = cpu_to_be32(OP_SEQUENCE);
1743
1744         /*
1745          * Sessionid + seqid + slotid + max slotid + cache_this
1746          */
1747         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1748                 "max_slotid=%d cache_this=%d\n",
1749                 __func__,
1750                 ((u32 *)session->sess_id.data)[0],
1751                 ((u32 *)session->sess_id.data)[1],
1752                 ((u32 *)session->sess_id.data)[2],
1753                 ((u32 *)session->sess_id.data)[3],
1754                 slot->seq_nr, args->sa_slotid,
1755                 tp->highest_used_slotid, args->sa_cache_this);
1756         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1757         *p++ = cpu_to_be32(slot->seq_nr);
1758         *p++ = cpu_to_be32(args->sa_slotid);
1759         *p++ = cpu_to_be32(tp->highest_used_slotid);
1760         *p = cpu_to_be32(args->sa_cache_this);
1761         hdr->nops++;
1762         hdr->replen += decode_sequence_maxsz;
1763 #endif /* CONFIG_NFS_V4_1 */
1764 }
1765
1766 #ifdef CONFIG_NFS_V4_1
1767 static void
1768 encode_getdeviceinfo(struct xdr_stream *xdr,
1769                      const struct nfs4_getdeviceinfo_args *args,
1770                      struct compound_hdr *hdr)
1771 {
1772         __be32 *p;
1773
1774         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1775         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1776         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1777                                     NFS4_DEVICEID4_SIZE);
1778         *p++ = cpu_to_be32(args->pdev->layout_type);
1779         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1780         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1781         hdr->nops++;
1782         hdr->replen += decode_getdeviceinfo_maxsz;
1783 }
1784
1785 static void
1786 encode_layoutget(struct xdr_stream *xdr,
1787                       const struct nfs4_layoutget_args *args,
1788                       struct compound_hdr *hdr)
1789 {
1790         nfs4_stateid stateid;
1791         __be32 *p;
1792
1793         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1794         *p++ = cpu_to_be32(OP_LAYOUTGET);
1795         *p++ = cpu_to_be32(0);     /* Signal layout available */
1796         *p++ = cpu_to_be32(args->type);
1797         *p++ = cpu_to_be32(args->range.iomode);
1798         p = xdr_encode_hyper(p, args->range.offset);
1799         p = xdr_encode_hyper(p, args->range.length);
1800         p = xdr_encode_hyper(p, args->minlength);
1801         pnfs_get_layout_stateid(&stateid, NFS_I(args->inode)->layout,
1802                                 args->ctx->state);
1803         p = xdr_encode_opaque_fixed(p, &stateid.data, NFS4_STATEID_SIZE);
1804         *p = cpu_to_be32(args->maxcount);
1805
1806         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1807                 __func__,
1808                 args->type,
1809                 args->range.iomode,
1810                 (unsigned long)args->range.offset,
1811                 (unsigned long)args->range.length,
1812                 args->maxcount);
1813         hdr->nops++;
1814         hdr->replen += decode_layoutget_maxsz;
1815 }
1816 #endif /* CONFIG_NFS_V4_1 */
1817
1818 /*
1819  * END OF "GENERIC" ENCODE ROUTINES.
1820  */
1821
1822 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1823 {
1824 #if defined(CONFIG_NFS_V4_1)
1825         if (args->sa_session)
1826                 return args->sa_session->clp->cl_mvops->minor_version;
1827 #endif /* CONFIG_NFS_V4_1 */
1828         return 0;
1829 }
1830
1831 /*
1832  * Encode an ACCESS request
1833  */
1834 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1835                                 const struct nfs4_accessargs *args)
1836 {
1837         struct compound_hdr hdr = {
1838                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1839         };
1840
1841         encode_compound_hdr(xdr, req, &hdr);
1842         encode_sequence(xdr, &args->seq_args, &hdr);
1843         encode_putfh(xdr, args->fh, &hdr);
1844         encode_access(xdr, args->access, &hdr);
1845         encode_getfattr(xdr, args->bitmask, &hdr);
1846         encode_nops(&hdr);
1847 }
1848
1849 /*
1850  * Encode LOOKUP request
1851  */
1852 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1853                                 const struct nfs4_lookup_arg *args)
1854 {
1855         struct compound_hdr hdr = {
1856                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1857         };
1858
1859         encode_compound_hdr(xdr, req, &hdr);
1860         encode_sequence(xdr, &args->seq_args, &hdr);
1861         encode_putfh(xdr, args->dir_fh, &hdr);
1862         encode_lookup(xdr, args->name, &hdr);
1863         encode_getfh(xdr, &hdr);
1864         encode_getfattr(xdr, args->bitmask, &hdr);
1865         encode_nops(&hdr);
1866 }
1867
1868 /*
1869  * Encode LOOKUP_ROOT request
1870  */
1871 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1872                                      struct xdr_stream *xdr,
1873                                      const struct nfs4_lookup_root_arg *args)
1874 {
1875         struct compound_hdr hdr = {
1876                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1877         };
1878
1879         encode_compound_hdr(xdr, req, &hdr);
1880         encode_sequence(xdr, &args->seq_args, &hdr);
1881         encode_putrootfh(xdr, &hdr);
1882         encode_getfh(xdr, &hdr);
1883         encode_getfattr(xdr, args->bitmask, &hdr);
1884         encode_nops(&hdr);
1885 }
1886
1887 /*
1888  * Encode REMOVE request
1889  */
1890 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1891                                 const struct nfs_removeargs *args)
1892 {
1893         struct compound_hdr hdr = {
1894                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1895         };
1896
1897         encode_compound_hdr(xdr, req, &hdr);
1898         encode_sequence(xdr, &args->seq_args, &hdr);
1899         encode_putfh(xdr, args->fh, &hdr);
1900         encode_remove(xdr, &args->name, &hdr);
1901         encode_getfattr(xdr, args->bitmask, &hdr);
1902         encode_nops(&hdr);
1903 }
1904
1905 /*
1906  * Encode RENAME request
1907  */
1908 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1909                                 const struct nfs_renameargs *args)
1910 {
1911         struct compound_hdr hdr = {
1912                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1913         };
1914
1915         encode_compound_hdr(xdr, req, &hdr);
1916         encode_sequence(xdr, &args->seq_args, &hdr);
1917         encode_putfh(xdr, args->old_dir, &hdr);
1918         encode_savefh(xdr, &hdr);
1919         encode_putfh(xdr, args->new_dir, &hdr);
1920         encode_rename(xdr, args->old_name, args->new_name, &hdr);
1921         encode_getfattr(xdr, args->bitmask, &hdr);
1922         encode_restorefh(xdr, &hdr);
1923         encode_getfattr(xdr, args->bitmask, &hdr);
1924         encode_nops(&hdr);
1925 }
1926
1927 /*
1928  * Encode LINK request
1929  */
1930 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
1931                              const struct nfs4_link_arg *args)
1932 {
1933         struct compound_hdr hdr = {
1934                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1935         };
1936
1937         encode_compound_hdr(xdr, req, &hdr);
1938         encode_sequence(xdr, &args->seq_args, &hdr);
1939         encode_putfh(xdr, args->fh, &hdr);
1940         encode_savefh(xdr, &hdr);
1941         encode_putfh(xdr, args->dir_fh, &hdr);
1942         encode_link(xdr, args->name, &hdr);
1943         encode_getfattr(xdr, args->bitmask, &hdr);
1944         encode_restorefh(xdr, &hdr);
1945         encode_getfattr(xdr, args->bitmask, &hdr);
1946         encode_nops(&hdr);
1947 }
1948
1949 /*
1950  * Encode CREATE request
1951  */
1952 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
1953                                 const struct nfs4_create_arg *args)
1954 {
1955         struct compound_hdr hdr = {
1956                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1957         };
1958
1959         encode_compound_hdr(xdr, req, &hdr);
1960         encode_sequence(xdr, &args->seq_args, &hdr);
1961         encode_putfh(xdr, args->dir_fh, &hdr);
1962         encode_savefh(xdr, &hdr);
1963         encode_create(xdr, args, &hdr);
1964         encode_getfh(xdr, &hdr);
1965         encode_getfattr(xdr, args->bitmask, &hdr);
1966         encode_restorefh(xdr, &hdr);
1967         encode_getfattr(xdr, args->bitmask, &hdr);
1968         encode_nops(&hdr);
1969 }
1970
1971 /*
1972  * Encode SYMLINK request
1973  */
1974 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
1975                                  const struct nfs4_create_arg *args)
1976 {
1977         nfs4_xdr_enc_create(req, xdr, args);
1978 }
1979
1980 /*
1981  * Encode GETATTR request
1982  */
1983 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
1984                                  const struct nfs4_getattr_arg *args)
1985 {
1986         struct compound_hdr hdr = {
1987                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1988         };
1989
1990         encode_compound_hdr(xdr, req, &hdr);
1991         encode_sequence(xdr, &args->seq_args, &hdr);
1992         encode_putfh(xdr, args->fh, &hdr);
1993         encode_getfattr(xdr, args->bitmask, &hdr);
1994         encode_nops(&hdr);
1995 }
1996
1997 /*
1998  * Encode a CLOSE request
1999  */
2000 static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
2001                                struct nfs_closeargs *args)
2002 {
2003         struct compound_hdr hdr = {
2004                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2005         };
2006
2007         encode_compound_hdr(xdr, req, &hdr);
2008         encode_sequence(xdr, &args->seq_args, &hdr);
2009         encode_putfh(xdr, args->fh, &hdr);
2010         encode_close(xdr, args, &hdr);
2011         encode_getfattr(xdr, args->bitmask, &hdr);
2012         encode_nops(&hdr);
2013 }
2014
2015 /*
2016  * Encode an OPEN request
2017  */
2018 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2019                               struct nfs_openargs *args)
2020 {
2021         struct compound_hdr hdr = {
2022                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2023         };
2024
2025         encode_compound_hdr(xdr, req, &hdr);
2026         encode_sequence(xdr, &args->seq_args, &hdr);
2027         encode_putfh(xdr, args->fh, &hdr);
2028         encode_savefh(xdr, &hdr);
2029         encode_open(xdr, args, &hdr);
2030         encode_getfh(xdr, &hdr);
2031         encode_getfattr(xdr, args->bitmask, &hdr);
2032         encode_restorefh(xdr, &hdr);
2033         encode_getfattr(xdr, args->bitmask, &hdr);
2034         encode_nops(&hdr);
2035 }
2036
2037 /*
2038  * Encode an OPEN_CONFIRM request
2039  */
2040 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2041                                       struct xdr_stream *xdr,
2042                                       struct nfs_open_confirmargs *args)
2043 {
2044         struct compound_hdr hdr = {
2045                 .nops   = 0,
2046         };
2047
2048         encode_compound_hdr(xdr, req, &hdr);
2049         encode_putfh(xdr, args->fh, &hdr);
2050         encode_open_confirm(xdr, args, &hdr);
2051         encode_nops(&hdr);
2052 }
2053
2054 /*
2055  * Encode an OPEN request with no attributes.
2056  */
2057 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2058                                      struct xdr_stream *xdr,
2059                                      struct nfs_openargs *args)
2060 {
2061         struct compound_hdr hdr = {
2062                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2063         };
2064
2065         encode_compound_hdr(xdr, req, &hdr);
2066         encode_sequence(xdr, &args->seq_args, &hdr);
2067         encode_putfh(xdr, args->fh, &hdr);
2068         encode_open(xdr, args, &hdr);
2069         encode_getfattr(xdr, args->bitmask, &hdr);
2070         encode_nops(&hdr);
2071 }
2072
2073 /*
2074  * Encode an OPEN_DOWNGRADE request
2075  */
2076 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2077                                         struct xdr_stream *xdr,
2078                                         struct nfs_closeargs *args)
2079 {
2080         struct compound_hdr hdr = {
2081                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2082         };
2083
2084         encode_compound_hdr(xdr, req, &hdr);
2085         encode_sequence(xdr, &args->seq_args, &hdr);
2086         encode_putfh(xdr, args->fh, &hdr);
2087         encode_open_downgrade(xdr, args, &hdr);
2088         encode_getfattr(xdr, args->bitmask, &hdr);
2089         encode_nops(&hdr);
2090 }
2091
2092 /*
2093  * Encode a LOCK request
2094  */
2095 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2096                               struct nfs_lock_args *args)
2097 {
2098         struct compound_hdr hdr = {
2099                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2100         };
2101
2102         encode_compound_hdr(xdr, req, &hdr);
2103         encode_sequence(xdr, &args->seq_args, &hdr);
2104         encode_putfh(xdr, args->fh, &hdr);
2105         encode_lock(xdr, args, &hdr);
2106         encode_nops(&hdr);
2107 }
2108
2109 /*
2110  * Encode a LOCKT request
2111  */
2112 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2113                                struct nfs_lockt_args *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_lockt(xdr, args, &hdr);
2123         encode_nops(&hdr);
2124 }
2125
2126 /*
2127  * Encode a LOCKU request
2128  */
2129 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2130                                struct nfs_locku_args *args)
2131 {
2132         struct compound_hdr hdr = {
2133                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2134         };
2135
2136         encode_compound_hdr(xdr, req, &hdr);
2137         encode_sequence(xdr, &args->seq_args, &hdr);
2138         encode_putfh(xdr, args->fh, &hdr);
2139         encode_locku(xdr, args, &hdr);
2140         encode_nops(&hdr);
2141 }
2142
2143 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2144                                            struct xdr_stream *xdr,
2145                                         struct nfs_release_lockowner_args *args)
2146 {
2147         struct compound_hdr hdr = {
2148                 .minorversion = 0,
2149         };
2150
2151         encode_compound_hdr(xdr, req, &hdr);
2152         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2153         encode_nops(&hdr);
2154 }
2155
2156 /*
2157  * Encode a READLINK request
2158  */
2159 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2160                                   const struct nfs4_readlink *args)
2161 {
2162         struct compound_hdr hdr = {
2163                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2164         };
2165
2166         encode_compound_hdr(xdr, req, &hdr);
2167         encode_sequence(xdr, &args->seq_args, &hdr);
2168         encode_putfh(xdr, args->fh, &hdr);
2169         encode_readlink(xdr, args, req, &hdr);
2170
2171         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2172                         args->pgbase, args->pglen);
2173         encode_nops(&hdr);
2174 }
2175
2176 /*
2177  * Encode a READDIR request
2178  */
2179 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2180                                  const struct nfs4_readdir_arg *args)
2181 {
2182         struct compound_hdr hdr = {
2183                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2184         };
2185
2186         encode_compound_hdr(xdr, req, &hdr);
2187         encode_sequence(xdr, &args->seq_args, &hdr);
2188         encode_putfh(xdr, args->fh, &hdr);
2189         encode_readdir(xdr, args, req, &hdr);
2190
2191         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2192                          args->pgbase, args->count);
2193         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2194                         __func__, hdr.replen << 2, args->pages,
2195                         args->pgbase, args->count);
2196         encode_nops(&hdr);
2197 }
2198
2199 /*
2200  * Encode a READ request
2201  */
2202 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2203                               struct nfs_readargs *args)
2204 {
2205         struct compound_hdr hdr = {
2206                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2207         };
2208
2209         encode_compound_hdr(xdr, req, &hdr);
2210         encode_sequence(xdr, &args->seq_args, &hdr);
2211         encode_putfh(xdr, args->fh, &hdr);
2212         encode_read(xdr, args, &hdr);
2213
2214         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2215                          args->pages, args->pgbase, args->count);
2216         req->rq_rcv_buf.flags |= XDRBUF_READ;
2217         encode_nops(&hdr);
2218 }
2219
2220 /*
2221  * Encode an SETATTR request
2222  */
2223 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2224                                  struct nfs_setattrargs *args)
2225 {
2226         struct compound_hdr hdr = {
2227                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2228         };
2229
2230         encode_compound_hdr(xdr, req, &hdr);
2231         encode_sequence(xdr, &args->seq_args, &hdr);
2232         encode_putfh(xdr, args->fh, &hdr);
2233         encode_setattr(xdr, args, args->server, &hdr);
2234         encode_getfattr(xdr, args->bitmask, &hdr);
2235         encode_nops(&hdr);
2236 }
2237
2238 /*
2239  * Encode a GETACL request
2240  */
2241 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2242                                 struct nfs_getaclargs *args)
2243 {
2244         struct compound_hdr hdr = {
2245                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2246         };
2247         uint32_t replen;
2248
2249         encode_compound_hdr(xdr, req, &hdr);
2250         encode_sequence(xdr, &args->seq_args, &hdr);
2251         encode_putfh(xdr, args->fh, &hdr);
2252         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2253         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2254
2255         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2256                 args->acl_pages, args->acl_pgbase, args->acl_len);
2257         encode_nops(&hdr);
2258 }
2259
2260 /*
2261  * Encode a WRITE request
2262  */
2263 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2264                                struct nfs_writeargs *args)
2265 {
2266         struct compound_hdr hdr = {
2267                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2268         };
2269
2270         encode_compound_hdr(xdr, req, &hdr);
2271         encode_sequence(xdr, &args->seq_args, &hdr);
2272         encode_putfh(xdr, args->fh, &hdr);
2273         encode_write(xdr, args, &hdr);
2274         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2275         encode_getfattr(xdr, args->bitmask, &hdr);
2276         encode_nops(&hdr);
2277 }
2278
2279 /*
2280  *  a COMMIT request
2281  */
2282 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2283                                 struct nfs_writeargs *args)
2284 {
2285         struct compound_hdr hdr = {
2286                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2287         };
2288
2289         encode_compound_hdr(xdr, req, &hdr);
2290         encode_sequence(xdr, &args->seq_args, &hdr);
2291         encode_putfh(xdr, args->fh, &hdr);
2292         encode_commit(xdr, args, &hdr);
2293         encode_getfattr(xdr, args->bitmask, &hdr);
2294         encode_nops(&hdr);
2295 }
2296
2297 /*
2298  * FSINFO request
2299  */
2300 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2301                                 struct nfs4_fsinfo_arg *args)
2302 {
2303         struct compound_hdr hdr = {
2304                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2305         };
2306
2307         encode_compound_hdr(xdr, req, &hdr);
2308         encode_sequence(xdr, &args->seq_args, &hdr);
2309         encode_putfh(xdr, args->fh, &hdr);
2310         encode_fsinfo(xdr, args->bitmask, &hdr);
2311         encode_nops(&hdr);
2312 }
2313
2314 /*
2315  * a PATHCONF request
2316  */
2317 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2318                                   const struct nfs4_pathconf_arg *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_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2328                            &hdr);
2329         encode_nops(&hdr);
2330 }
2331
2332 /*
2333  * a STATFS request
2334  */
2335 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2336                                 const struct nfs4_statfs_arg *args)
2337 {
2338         struct compound_hdr hdr = {
2339                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2340         };
2341
2342         encode_compound_hdr(xdr, req, &hdr);
2343         encode_sequence(xdr, &args->seq_args, &hdr);
2344         encode_putfh(xdr, args->fh, &hdr);
2345         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2346                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2347         encode_nops(&hdr);
2348 }
2349
2350 /*
2351  * GETATTR_BITMAP request
2352  */
2353 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2354                                      struct xdr_stream *xdr,
2355                                      struct nfs4_server_caps_arg *args)
2356 {
2357         struct compound_hdr hdr = {
2358                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2359         };
2360
2361         encode_compound_hdr(xdr, req, &hdr);
2362         encode_sequence(xdr, &args->seq_args, &hdr);
2363         encode_putfh(xdr, args->fhandle, &hdr);
2364         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2365                            FATTR4_WORD0_LINK_SUPPORT|
2366                            FATTR4_WORD0_SYMLINK_SUPPORT|
2367                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2368         encode_nops(&hdr);
2369 }
2370
2371 /*
2372  * a RENEW request
2373  */
2374 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2375                                struct nfs_client *clp)
2376 {
2377         struct compound_hdr hdr = {
2378                 .nops   = 0,
2379         };
2380
2381         encode_compound_hdr(xdr, req, &hdr);
2382         encode_renew(xdr, clp, &hdr);
2383         encode_nops(&hdr);
2384 }
2385
2386 /*
2387  * a SETCLIENTID request
2388  */
2389 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2390                                      struct xdr_stream *xdr,
2391                                      struct nfs4_setclientid *sc)
2392 {
2393         struct compound_hdr hdr = {
2394                 .nops   = 0,
2395         };
2396
2397         encode_compound_hdr(xdr, req, &hdr);
2398         encode_setclientid(xdr, sc, &hdr);
2399         encode_nops(&hdr);
2400 }
2401
2402 /*
2403  * a SETCLIENTID_CONFIRM request
2404  */
2405 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2406                                              struct xdr_stream *xdr,
2407                                              struct nfs4_setclientid_res *arg)
2408 {
2409         struct compound_hdr hdr = {
2410                 .nops   = 0,
2411         };
2412         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2413
2414         encode_compound_hdr(xdr, req, &hdr);
2415         encode_setclientid_confirm(xdr, arg, &hdr);
2416         encode_putrootfh(xdr, &hdr);
2417         encode_fsinfo(xdr, lease_bitmap, &hdr);
2418         encode_nops(&hdr);
2419 }
2420
2421 /*
2422  * DELEGRETURN request
2423  */
2424 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2425                                      struct xdr_stream *xdr,
2426                                      const struct nfs4_delegreturnargs *args)
2427 {
2428         struct compound_hdr hdr = {
2429                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2430         };
2431
2432         encode_compound_hdr(xdr, req, &hdr);
2433         encode_sequence(xdr, &args->seq_args, &hdr);
2434         encode_putfh(xdr, args->fhandle, &hdr);
2435         encode_delegreturn(xdr, args->stateid, &hdr);
2436         encode_getfattr(xdr, args->bitmask, &hdr);
2437         encode_nops(&hdr);
2438 }
2439
2440 /*
2441  * Encode FS_LOCATIONS request
2442  */
2443 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2444                                       struct xdr_stream *xdr,
2445                                       struct nfs4_fs_locations_arg *args)
2446 {
2447         struct compound_hdr hdr = {
2448                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2449         };
2450         uint32_t replen;
2451
2452         encode_compound_hdr(xdr, req, &hdr);
2453         encode_sequence(xdr, &args->seq_args, &hdr);
2454         encode_putfh(xdr, args->dir_fh, &hdr);
2455         encode_lookup(xdr, args->name, &hdr);
2456         replen = hdr.replen;    /* get the attribute into args->page */
2457         encode_fs_locations(xdr, args->bitmask, &hdr);
2458
2459         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2460                         0, PAGE_SIZE);
2461         encode_nops(&hdr);
2462 }
2463
2464 #if defined(CONFIG_NFS_V4_1)
2465 /*
2466  * EXCHANGE_ID request
2467  */
2468 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2469                                      struct xdr_stream *xdr,
2470                                      struct nfs41_exchange_id_args *args)
2471 {
2472         struct compound_hdr hdr = {
2473                 .minorversion = args->client->cl_mvops->minor_version,
2474         };
2475
2476         encode_compound_hdr(xdr, req, &hdr);
2477         encode_exchange_id(xdr, args, &hdr);
2478         encode_nops(&hdr);
2479 }
2480
2481 /*
2482  * a CREATE_SESSION request
2483  */
2484 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2485                                         struct xdr_stream *xdr,
2486                                         struct nfs41_create_session_args *args)
2487 {
2488         struct compound_hdr hdr = {
2489                 .minorversion = args->client->cl_mvops->minor_version,
2490         };
2491
2492         encode_compound_hdr(xdr, req, &hdr);
2493         encode_create_session(xdr, args, &hdr);
2494         encode_nops(&hdr);
2495 }
2496
2497 /*
2498  * a DESTROY_SESSION request
2499  */
2500 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2501                                          struct xdr_stream *xdr,
2502                                          struct nfs4_session *session)
2503 {
2504         struct compound_hdr hdr = {
2505                 .minorversion = session->clp->cl_mvops->minor_version,
2506         };
2507
2508         encode_compound_hdr(xdr, req, &hdr);
2509         encode_destroy_session(xdr, session, &hdr);
2510         encode_nops(&hdr);
2511 }
2512
2513 /*
2514  * a SEQUENCE request
2515  */
2516 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2517                                   struct nfs4_sequence_args *args)
2518 {
2519         struct compound_hdr hdr = {
2520                 .minorversion = nfs4_xdr_minorversion(args),
2521         };
2522
2523         encode_compound_hdr(xdr, req, &hdr);
2524         encode_sequence(xdr, args, &hdr);
2525         encode_nops(&hdr);
2526 }
2527
2528 /*
2529  * a GET_LEASE_TIME request
2530  */
2531 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2532                                         struct xdr_stream *xdr,
2533                                         struct nfs4_get_lease_time_args *args)
2534 {
2535         struct compound_hdr hdr = {
2536                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2537         };
2538         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2539
2540         encode_compound_hdr(xdr, req, &hdr);
2541         encode_sequence(xdr, &args->la_seq_args, &hdr);
2542         encode_putrootfh(xdr, &hdr);
2543         encode_fsinfo(xdr, lease_bitmap, &hdr);
2544         encode_nops(&hdr);
2545 }
2546
2547 /*
2548  * a RECLAIM_COMPLETE request
2549  */
2550 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2551                                           struct xdr_stream *xdr,
2552                                 struct nfs41_reclaim_complete_args *args)
2553 {
2554         struct compound_hdr hdr = {
2555                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2556         };
2557
2558         encode_compound_hdr(xdr, req, &hdr);
2559         encode_sequence(xdr, &args->seq_args, &hdr);
2560         encode_reclaim_complete(xdr, args, &hdr);
2561         encode_nops(&hdr);
2562 }
2563
2564 /*
2565  * Encode GETDEVICEINFO request
2566  */
2567 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2568                                        struct xdr_stream *xdr,
2569                                        struct nfs4_getdeviceinfo_args *args)
2570 {
2571         struct compound_hdr hdr = {
2572                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2573         };
2574
2575         encode_compound_hdr(xdr, req, &hdr);
2576         encode_sequence(xdr, &args->seq_args, &hdr);
2577         encode_getdeviceinfo(xdr, args, &hdr);
2578
2579         /* set up reply kvec. Subtract notification bitmap max size (2)
2580          * so that notification bitmap is put in xdr_buf tail */
2581         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2582                          args->pdev->pages, args->pdev->pgbase,
2583                          args->pdev->pglen);
2584
2585         encode_nops(&hdr);
2586 }
2587
2588 /*
2589  *  Encode LAYOUTGET request
2590  */
2591 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2592                                    struct xdr_stream *xdr,
2593                                    struct nfs4_layoutget_args *args)
2594 {
2595         struct compound_hdr hdr = {
2596                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2597         };
2598
2599         encode_compound_hdr(xdr, req, &hdr);
2600         encode_sequence(xdr, &args->seq_args, &hdr);
2601         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2602         encode_layoutget(xdr, args, &hdr);
2603         encode_nops(&hdr);
2604 }
2605 #endif /* CONFIG_NFS_V4_1 */
2606
2607 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2608 {
2609         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2610                 "Remaining buffer length is %tu words.\n",
2611                 func, xdr->end - xdr->p);
2612 }
2613
2614 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2615 {
2616         __be32 *p;
2617
2618         p = xdr_inline_decode(xdr, 4);
2619         if (unlikely(!p))
2620                 goto out_overflow;
2621         *len = be32_to_cpup(p);
2622         p = xdr_inline_decode(xdr, *len);
2623         if (unlikely(!p))
2624                 goto out_overflow;
2625         *string = (char *)p;
2626         return 0;
2627 out_overflow:
2628         print_overflow_msg(__func__, xdr);
2629         return -EIO;
2630 }
2631
2632 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2633 {
2634         __be32 *p;
2635
2636         p = xdr_inline_decode(xdr, 8);
2637         if (unlikely(!p))
2638                 goto out_overflow;
2639         hdr->status = be32_to_cpup(p++);
2640         hdr->taglen = be32_to_cpup(p);
2641
2642         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2643         if (unlikely(!p))
2644                 goto out_overflow;
2645         hdr->tag = (char *)p;
2646         p += XDR_QUADLEN(hdr->taglen);
2647         hdr->nops = be32_to_cpup(p);
2648         if (unlikely(hdr->nops < 1))
2649                 return nfs4_stat_to_errno(hdr->status);
2650         return 0;
2651 out_overflow:
2652         print_overflow_msg(__func__, xdr);
2653         return -EIO;
2654 }
2655
2656 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2657 {
2658         __be32 *p;
2659         uint32_t opnum;
2660         int32_t nfserr;
2661
2662         p = xdr_inline_decode(xdr, 8);
2663         if (unlikely(!p))
2664                 goto out_overflow;
2665         opnum = be32_to_cpup(p++);
2666         if (opnum != expected) {
2667                 dprintk("nfs: Server returned operation"
2668                         " %d but we issued a request for %d\n",
2669                                 opnum, expected);
2670                 return -EIO;
2671         }
2672         nfserr = be32_to_cpup(p);
2673         if (nfserr != NFS_OK)
2674                 return nfs4_stat_to_errno(nfserr);
2675         return 0;
2676 out_overflow:
2677         print_overflow_msg(__func__, xdr);
2678         return -EIO;
2679 }
2680
2681 /* Dummy routine */
2682 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2683 {
2684         __be32 *p;
2685         unsigned int strlen;
2686         char *str;
2687
2688         p = xdr_inline_decode(xdr, 12);
2689         if (likely(p))
2690                 return decode_opaque_inline(xdr, &strlen, &str);
2691         print_overflow_msg(__func__, xdr);
2692         return -EIO;
2693 }
2694
2695 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2696 {
2697         uint32_t bmlen;
2698         __be32 *p;
2699
2700         p = xdr_inline_decode(xdr, 4);
2701         if (unlikely(!p))
2702                 goto out_overflow;
2703         bmlen = be32_to_cpup(p);
2704
2705         bitmap[0] = bitmap[1] = 0;
2706         p = xdr_inline_decode(xdr, (bmlen << 2));
2707         if (unlikely(!p))
2708                 goto out_overflow;
2709         if (bmlen > 0) {
2710                 bitmap[0] = be32_to_cpup(p++);
2711                 if (bmlen > 1)
2712                         bitmap[1] = be32_to_cpup(p);
2713         }
2714         return 0;
2715 out_overflow:
2716         print_overflow_msg(__func__, xdr);
2717         return -EIO;
2718 }
2719
2720 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2721 {
2722         __be32 *p;
2723
2724         p = xdr_inline_decode(xdr, 4);
2725         if (unlikely(!p))
2726                 goto out_overflow;
2727         *attrlen = be32_to_cpup(p);
2728         *savep = xdr->p;
2729         return 0;
2730 out_overflow:
2731         print_overflow_msg(__func__, xdr);
2732         return -EIO;
2733 }
2734
2735 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2736 {
2737         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2738                 int ret;
2739                 ret = decode_attr_bitmap(xdr, bitmask);
2740                 if (unlikely(ret < 0))
2741                         return ret;
2742                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2743         } else
2744                 bitmask[0] = bitmask[1] = 0;
2745         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2746         return 0;
2747 }
2748
2749 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2750 {
2751         __be32 *p;
2752         int ret = 0;
2753
2754         *type = 0;
2755         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2756                 return -EIO;
2757         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2758                 p = xdr_inline_decode(xdr, 4);
2759                 if (unlikely(!p))
2760                         goto out_overflow;
2761                 *type = be32_to_cpup(p);
2762                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2763                         dprintk("%s: bad type %d\n", __func__, *type);
2764                         return -EIO;
2765                 }
2766                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2767                 ret = NFS_ATTR_FATTR_TYPE;
2768         }
2769         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2770         return ret;
2771 out_overflow:
2772         print_overflow_msg(__func__, xdr);
2773         return -EIO;
2774 }
2775
2776 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2777 {
2778         __be32 *p;
2779         int ret = 0;
2780
2781         *change = 0;
2782         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2783                 return -EIO;
2784         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2785                 p = xdr_inline_decode(xdr, 8);
2786                 if (unlikely(!p))
2787                         goto out_overflow;
2788                 xdr_decode_hyper(p, change);
2789                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2790                 ret = NFS_ATTR_FATTR_CHANGE;
2791         }
2792         dprintk("%s: change attribute=%Lu\n", __func__,
2793                         (unsigned long long)*change);
2794         return ret;
2795 out_overflow:
2796         print_overflow_msg(__func__, xdr);
2797         return -EIO;
2798 }
2799
2800 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2801 {
2802         __be32 *p;
2803         int ret = 0;
2804
2805         *size = 0;
2806         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2807                 return -EIO;
2808         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2809                 p = xdr_inline_decode(xdr, 8);
2810                 if (unlikely(!p))
2811                         goto out_overflow;
2812                 xdr_decode_hyper(p, size);
2813                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2814                 ret = NFS_ATTR_FATTR_SIZE;
2815         }
2816         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2817         return ret;
2818 out_overflow:
2819         print_overflow_msg(__func__, xdr);
2820         return -EIO;
2821 }
2822
2823 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2824 {
2825         __be32 *p;
2826
2827         *res = 0;
2828         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2829                 return -EIO;
2830         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2831                 p = xdr_inline_decode(xdr, 4);
2832                 if (unlikely(!p))
2833                         goto out_overflow;
2834                 *res = be32_to_cpup(p);
2835                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2836         }
2837         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2838         return 0;
2839 out_overflow:
2840         print_overflow_msg(__func__, xdr);
2841         return -EIO;
2842 }
2843
2844 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2845 {
2846         __be32 *p;
2847
2848         *res = 0;
2849         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2850                 return -EIO;
2851         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2852                 p = xdr_inline_decode(xdr, 4);
2853                 if (unlikely(!p))
2854                         goto out_overflow;
2855                 *res = be32_to_cpup(p);
2856                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2857         }
2858         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2859         return 0;
2860 out_overflow:
2861         print_overflow_msg(__func__, xdr);
2862         return -EIO;
2863 }
2864
2865 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2866 {
2867         __be32 *p;
2868         int ret = 0;
2869
2870         fsid->major = 0;
2871         fsid->minor = 0;
2872         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2873                 return -EIO;
2874         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2875                 p = xdr_inline_decode(xdr, 16);
2876                 if (unlikely(!p))
2877                         goto out_overflow;
2878                 p = xdr_decode_hyper(p, &fsid->major);
2879                 xdr_decode_hyper(p, &fsid->minor);
2880                 bitmap[0] &= ~FATTR4_WORD0_FSID;
2881                 ret = NFS_ATTR_FATTR_FSID;
2882         }
2883         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
2884                         (unsigned long long)fsid->major,
2885                         (unsigned long long)fsid->minor);
2886         return ret;
2887 out_overflow:
2888         print_overflow_msg(__func__, xdr);
2889         return -EIO;
2890 }
2891
2892 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2893 {
2894         __be32 *p;
2895
2896         *res = 60;
2897         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
2898                 return -EIO;
2899         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
2900                 p = xdr_inline_decode(xdr, 4);
2901                 if (unlikely(!p))
2902                         goto out_overflow;
2903                 *res = be32_to_cpup(p);
2904                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
2905         }
2906         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
2907         return 0;
2908 out_overflow:
2909         print_overflow_msg(__func__, xdr);
2910         return -EIO;
2911 }
2912
2913 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
2914 {
2915         __be32 *p;
2916
2917         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
2918                 return -EIO;
2919         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
2920                 p = xdr_inline_decode(xdr, 4);
2921                 if (unlikely(!p))
2922                         goto out_overflow;
2923                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
2924         }
2925         return 0;
2926 out_overflow:
2927         print_overflow_msg(__func__, xdr);
2928         return -EIO;
2929 }
2930
2931 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
2932 {
2933         __be32 *p;
2934         int len;
2935
2936         if (fh != NULL)
2937                 memset(fh, 0, sizeof(*fh));
2938
2939         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
2940                 return -EIO;
2941         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
2942                 p = xdr_inline_decode(xdr, 4);
2943                 if (unlikely(!p))
2944                         goto out_overflow;
2945                 len = be32_to_cpup(p);
2946                 if (len > NFS4_FHSIZE)
2947                         return -EIO;
2948                 p = xdr_inline_decode(xdr, len);
2949                 if (unlikely(!p))
2950                         goto out_overflow;
2951                 if (fh != NULL) {
2952                         memcpy(fh->data, p, len);
2953                         fh->size = len;
2954                 }
2955                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
2956         }
2957         return 0;
2958 out_overflow:
2959         print_overflow_msg(__func__, xdr);
2960         return -EIO;
2961 }
2962
2963 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2964 {
2965         __be32 *p;
2966
2967         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
2968         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
2969                 return -EIO;
2970         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
2971                 p = xdr_inline_decode(xdr, 4);
2972                 if (unlikely(!p))
2973                         goto out_overflow;
2974                 *res = be32_to_cpup(p);
2975                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
2976         }
2977         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
2978         return 0;
2979 out_overflow:
2980         print_overflow_msg(__func__, xdr);
2981         return -EIO;
2982 }
2983
2984 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
2985 {
2986         __be32 *p;
2987         int ret = 0;
2988
2989         *fileid = 0;
2990         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
2991                 return -EIO;
2992         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
2993                 p = xdr_inline_decode(xdr, 8);
2994                 if (unlikely(!p))
2995                         goto out_overflow;
2996                 xdr_decode_hyper(p, fileid);
2997                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
2998                 ret = NFS_ATTR_FATTR_FILEID;
2999         }
3000         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3001         return ret;
3002 out_overflow:
3003         print_overflow_msg(__func__, xdr);
3004         return -EIO;
3005 }
3006
3007 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3008 {
3009         __be32 *p;
3010         int ret = 0;
3011
3012         *fileid = 0;
3013         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3014                 return -EIO;
3015         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3016                 p = xdr_inline_decode(xdr, 8);
3017                 if (unlikely(!p))
3018                         goto out_overflow;
3019                 xdr_decode_hyper(p, fileid);
3020                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3021                 ret = NFS_ATTR_FATTR_FILEID;
3022         }
3023         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3024         return ret;
3025 out_overflow:
3026         print_overflow_msg(__func__, xdr);
3027         return -EIO;
3028 }
3029
3030 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3031 {
3032         __be32 *p;
3033         int status = 0;
3034
3035         *res = 0;
3036         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3037                 return -EIO;
3038         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3039                 p = xdr_inline_decode(xdr, 8);
3040                 if (unlikely(!p))
3041                         goto out_overflow;
3042                 xdr_decode_hyper(p, res);
3043                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3044         }
3045         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3046         return status;
3047 out_overflow:
3048         print_overflow_msg(__func__, xdr);
3049         return -EIO;
3050 }
3051
3052 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3053 {
3054         __be32 *p;
3055         int status = 0;
3056
3057         *res = 0;
3058         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3059                 return -EIO;
3060         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3061                 p = xdr_inline_decode(xdr, 8);
3062                 if (unlikely(!p))
3063                         goto out_overflow;
3064                 xdr_decode_hyper(p, res);
3065                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3066         }
3067         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3068         return status;
3069 out_overflow:
3070         print_overflow_msg(__func__, xdr);
3071         return -EIO;
3072 }
3073
3074 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3075 {
3076         __be32 *p;
3077         int status = 0;
3078
3079         *res = 0;
3080         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3081                 return -EIO;
3082         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3083                 p = xdr_inline_decode(xdr, 8);
3084                 if (unlikely(!p))
3085                         goto out_overflow;
3086                 xdr_decode_hyper(p, res);
3087                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3088         }
3089         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3090         return status;
3091 out_overflow:
3092         print_overflow_msg(__func__, xdr);
3093         return -EIO;
3094 }
3095
3096 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3097 {
3098         u32 n;
3099         __be32 *p;
3100         int status = 0;
3101
3102         p = xdr_inline_decode(xdr, 4);
3103         if (unlikely(!p))
3104                 goto out_overflow;
3105         n = be32_to_cpup(p);
3106         if (n == 0)
3107                 goto root_path;
3108         dprintk("path ");
3109         path->ncomponents = 0;
3110         while (path->ncomponents < n) {
3111                 struct nfs4_string *component = &path->components[path->ncomponents];
3112                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3113                 if (unlikely(status != 0))
3114                         goto out_eio;
3115                 if (path->ncomponents != n)
3116                         dprintk("/");
3117                 dprintk("%s", component->data);
3118                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3119                         path->ncomponents++;
3120                 else {
3121                         dprintk("cannot parse %d components in path\n", n);
3122                         goto out_eio;
3123                 }
3124         }
3125 out:
3126         dprintk("\n");
3127         return status;
3128 root_path:
3129 /* a root pathname is sent as a zero component4 */
3130         path->ncomponents = 1;
3131         path->components[0].len=0;
3132         path->components[0].data=NULL;
3133         dprintk("path /\n");
3134         goto out;
3135 out_eio:
3136         dprintk(" status %d", status);
3137         status = -EIO;
3138         goto out;
3139 out_overflow:
3140         print_overflow_msg(__func__, xdr);
3141         return -EIO;
3142 }
3143
3144 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3145 {
3146         int n;
3147         __be32 *p;
3148         int status = -EIO;
3149
3150         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3151                 goto out;
3152         status = 0;
3153         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3154                 goto out;
3155         dprintk("%s: fsroot ", __func__);
3156         status = decode_pathname(xdr, &res->fs_path);
3157         if (unlikely(status != 0))
3158                 goto out;
3159         p = xdr_inline_decode(xdr, 4);
3160         if (unlikely(!p))
3161                 goto out_overflow;
3162         n = be32_to_cpup(p);
3163         if (n <= 0)
3164                 goto out_eio;
3165         res->nlocations = 0;
3166         while (res->nlocations < n) {
3167                 u32 m;
3168                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3169
3170                 p = xdr_inline_decode(xdr, 4);
3171                 if (unlikely(!p))
3172                         goto out_overflow;
3173                 m = be32_to_cpup(p);
3174
3175                 loc->nservers = 0;
3176                 dprintk("%s: servers ", __func__);
3177                 while (loc->nservers < m) {
3178                         struct nfs4_string *server = &loc->servers[loc->nservers];
3179                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3180                         if (unlikely(status != 0))
3181                                 goto out_eio;
3182                         dprintk("%s ", server->data);
3183                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3184                                 loc->nservers++;
3185                         else {
3186                                 unsigned int i;
3187                                 dprintk("%s: using first %u of %u servers "
3188                                         "returned for location %u\n",
3189                                                 __func__,
3190                                                 NFS4_FS_LOCATION_MAXSERVERS,
3191                                                 m, res->nlocations);
3192                                 for (i = loc->nservers; i < m; i++) {
3193                                         unsigned int len;
3194                                         char *data;
3195                                         status = decode_opaque_inline(xdr, &len, &data);
3196                                         if (unlikely(status != 0))
3197                                                 goto out_eio;
3198                                 }
3199                         }
3200                 }
3201                 status = decode_pathname(xdr, &loc->rootpath);
3202                 if (unlikely(status != 0))
3203                         goto out_eio;
3204                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3205                         res->nlocations++;
3206         }
3207         if (res->nlocations != 0)
3208                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3209 out:
3210         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3211         return status;
3212 out_overflow:
3213         print_overflow_msg(__func__, xdr);
3214 out_eio:
3215         status = -EIO;
3216         goto out;
3217 }
3218
3219 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3220 {
3221         __be32 *p;
3222         int status = 0;
3223
3224         *res = 0;
3225         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3226                 return -EIO;
3227         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3228                 p = xdr_inline_decode(xdr, 8);
3229                 if (unlikely(!p))
3230                         goto out_overflow;
3231                 xdr_decode_hyper(p, res);
3232                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3233         }
3234         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3235         return status;
3236 out_overflow:
3237         print_overflow_msg(__func__, xdr);
3238         return -EIO;
3239 }
3240
3241 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3242 {
3243         __be32 *p;
3244         int status = 0;
3245
3246         *maxlink = 1;
3247         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3248                 return -EIO;
3249         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3250                 p = xdr_inline_decode(xdr, 4);
3251                 if (unlikely(!p))
3252                         goto out_overflow;
3253                 *maxlink = be32_to_cpup(p);
3254                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3255         }
3256         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3257         return status;
3258 out_overflow:
3259         print_overflow_msg(__func__, xdr);
3260         return -EIO;
3261 }
3262
3263 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3264 {
3265         __be32 *p;
3266         int status = 0;
3267
3268         *maxname = 1024;
3269         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3270                 return -EIO;
3271         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3272                 p = xdr_inline_decode(xdr, 4);
3273                 if (unlikely(!p))
3274                         goto out_overflow;
3275                 *maxname = be32_to_cpup(p);
3276                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3277         }
3278         dprintk("%s: maxname=%u\n", __func__, *maxname);
3279         return status;
3280 out_overflow:
3281         print_overflow_msg(__func__, xdr);
3282         return -EIO;
3283 }
3284
3285 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3286 {
3287         __be32 *p;
3288         int status = 0;
3289
3290         *res = 1024;
3291         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3292                 return -EIO;
3293         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3294                 uint64_t maxread;
3295                 p = xdr_inline_decode(xdr, 8);
3296                 if (unlikely(!p))
3297                         goto out_overflow;
3298                 xdr_decode_hyper(p, &maxread);
3299                 if (maxread > 0x7FFFFFFF)
3300                         maxread = 0x7FFFFFFF;
3301                 *res = (uint32_t)maxread;
3302                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3303         }
3304         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3305         return status;
3306 out_overflow:
3307         print_overflow_msg(__func__, xdr);
3308         return -EIO;
3309 }
3310
3311 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3312 {
3313         __be32 *p;
3314         int status = 0;
3315
3316         *res = 1024;
3317         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3318                 return -EIO;
3319         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3320                 uint64_t maxwrite;
3321                 p = xdr_inline_decode(xdr, 8);
3322                 if (unlikely(!p))
3323                         goto out_overflow;
3324                 xdr_decode_hyper(p, &maxwrite);
3325                 if (maxwrite > 0x7FFFFFFF)
3326                         maxwrite = 0x7FFFFFFF;
3327                 *res = (uint32_t)maxwrite;
3328                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3329         }
3330         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3331         return status;
3332 out_overflow:
3333         print_overflow_msg(__func__, xdr);
3334         return -EIO;
3335 }
3336
3337 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3338 {
3339         uint32_t tmp;
3340         __be32 *p;
3341         int ret = 0;
3342
3343         *mode = 0;
3344         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3345                 return -EIO;
3346         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3347                 p = xdr_inline_decode(xdr, 4);
3348                 if (unlikely(!p))
3349                         goto out_overflow;
3350                 tmp = be32_to_cpup(p);
3351                 *mode = tmp & ~S_IFMT;
3352                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3353                 ret = NFS_ATTR_FATTR_MODE;
3354         }
3355         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3356         return ret;
3357 out_overflow:
3358         print_overflow_msg(__func__, xdr);
3359         return -EIO;
3360 }
3361
3362 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3363 {
3364         __be32 *p;
3365         int ret = 0;
3366
3367         *nlink = 1;
3368         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3369                 return -EIO;
3370         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3371                 p = xdr_inline_decode(xdr, 4);
3372                 if (unlikely(!p))
3373                         goto out_overflow;
3374                 *nlink = be32_to_cpup(p);
3375                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3376                 ret = NFS_ATTR_FATTR_NLINK;
3377         }
3378         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3379         return ret;
3380 out_overflow:
3381         print_overflow_msg(__func__, xdr);
3382         return -EIO;
3383 }
3384
3385 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3386                 struct nfs_client *clp, uint32_t *uid, int may_sleep)
3387 {
3388         uint32_t len;
3389         __be32 *p;
3390         int ret = 0;
3391
3392         *uid = -2;
3393         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3394                 return -EIO;
3395         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3396                 p = xdr_inline_decode(xdr, 4);
3397                 if (unlikely(!p))
3398                         goto out_overflow;
3399                 len = be32_to_cpup(p);
3400                 p = xdr_inline_decode(xdr, len);
3401                 if (unlikely(!p))
3402                         goto out_overflow;
3403                 if (!may_sleep) {
3404                         /* do nothing */
3405                 } else if (len < XDR_MAX_NETOBJ) {
3406                         if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0)
3407                                 ret = NFS_ATTR_FATTR_OWNER;
3408                         else
3409                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3410                                                 __func__);
3411                 } else
3412                         dprintk("%s: name too long (%u)!\n",
3413                                         __func__, len);
3414                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3415         }
3416         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3417         return ret;
3418 out_overflow:
3419         print_overflow_msg(__func__, xdr);
3420         return -EIO;
3421 }
3422
3423 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3424                 struct nfs_client *clp, uint32_t *gid, int may_sleep)
3425 {
3426         uint32_t len;
3427         __be32 *p;
3428         int ret = 0;
3429
3430         *gid = -2;
3431         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3432                 return -EIO;
3433         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3434                 p = xdr_inline_decode(xdr, 4);
3435                 if (unlikely(!p))
3436                         goto out_overflow;
3437                 len = be32_to_cpup(p);
3438                 p = xdr_inline_decode(xdr, len);
3439                 if (unlikely(!p))
3440                         goto out_overflow;
3441                 if (!may_sleep) {
3442                         /* do nothing */
3443                 } else if (len < XDR_MAX_NETOBJ) {
3444                         if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0)
3445                                 ret = NFS_ATTR_FATTR_GROUP;
3446                         else
3447                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3448                                                 __func__);
3449                 } else
3450                         dprintk("%s: name too long (%u)!\n",
3451                                         __func__, len);
3452                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3453         }
3454         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3455         return ret;
3456 out_overflow:
3457         print_overflow_msg(__func__, xdr);
3458         return -EIO;
3459 }
3460
3461 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3462 {
3463         uint32_t major = 0, minor = 0;
3464         __be32 *p;
3465         int ret = 0;
3466
3467         *rdev = MKDEV(0,0);
3468         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3469                 return -EIO;
3470         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3471                 dev_t tmp;
3472
3473                 p = xdr_inline_decode(xdr, 8);
3474                 if (unlikely(!p))
3475                         goto out_overflow;
3476                 major = be32_to_cpup(p++);
3477                 minor = be32_to_cpup(p);
3478                 tmp = MKDEV(major, minor);
3479                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3480                         *rdev = tmp;
3481                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3482                 ret = NFS_ATTR_FATTR_RDEV;
3483         }
3484         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3485         return ret;
3486 out_overflow:
3487         print_overflow_msg(__func__, xdr);
3488         return -EIO;
3489 }
3490
3491 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3492 {
3493         __be32 *p;
3494         int status = 0;
3495
3496         *res = 0;
3497         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3498                 return -EIO;
3499         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3500                 p = xdr_inline_decode(xdr, 8);
3501                 if (unlikely(!p))
3502                         goto out_overflow;
3503                 xdr_decode_hyper(p, res);
3504                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3505         }
3506         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3507         return status;
3508 out_overflow:
3509         print_overflow_msg(__func__, xdr);
3510         return -EIO;
3511 }
3512
3513 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3514 {
3515         __be32 *p;
3516         int status = 0;
3517
3518         *res = 0;
3519         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3520                 return -EIO;
3521         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3522                 p = xdr_inline_decode(xdr, 8);
3523                 if (unlikely(!p))
3524                         goto out_overflow;
3525                 xdr_decode_hyper(p, res);
3526                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3527         }
3528         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3529         return status;
3530 out_overflow:
3531         print_overflow_msg(__func__, xdr);
3532         return -EIO;
3533 }
3534
3535 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3536 {
3537         __be32 *p;
3538         int status = 0;
3539
3540         *res = 0;
3541         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3542                 return -EIO;
3543         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3544                 p = xdr_inline_decode(xdr, 8);
3545                 if (unlikely(!p))
3546                         goto out_overflow;
3547                 xdr_decode_hyper(p, res);
3548                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3549         }
3550         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3551         return status;
3552 out_overflow:
3553         print_overflow_msg(__func__, xdr);
3554         return -EIO;
3555 }
3556
3557 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3558 {
3559         __be32 *p;
3560         int ret = 0;
3561
3562         *used = 0;
3563         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3564                 return -EIO;
3565         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3566                 p = xdr_inline_decode(xdr, 8);
3567                 if (unlikely(!p))
3568                         goto out_overflow;
3569                 xdr_decode_hyper(p, used);
3570                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3571                 ret = NFS_ATTR_FATTR_SPACE_USED;
3572         }
3573         dprintk("%s: space used=%Lu\n", __func__,
3574                         (unsigned long long)*used);
3575         return ret;
3576 out_overflow:
3577         print_overflow_msg(__func__, xdr);
3578         return -EIO;
3579 }
3580
3581 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3582 {
3583         __be32 *p;
3584         uint64_t sec;
3585         uint32_t nsec;
3586
3587         p = xdr_inline_decode(xdr, 12);
3588         if (unlikely(!p))
3589                 goto out_overflow;
3590         p = xdr_decode_hyper(p, &sec);
3591         nsec = be32_to_cpup(p);
3592         time->tv_sec = (time_t)sec;
3593         time->tv_nsec = (long)nsec;
3594         return 0;
3595 out_overflow:
3596         print_overflow_msg(__func__, xdr);
3597         return -EIO;
3598 }
3599
3600 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3601 {
3602         int status = 0;
3603
3604         time->tv_sec = 0;
3605         time->tv_nsec = 0;
3606         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3607                 return -EIO;
3608         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3609                 status = decode_attr_time(xdr, time);
3610                 if (status == 0)
3611                         status = NFS_ATTR_FATTR_ATIME;
3612                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3613         }
3614         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3615         return status;
3616 }
3617
3618 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3619 {
3620         int status = 0;
3621
3622         time->tv_sec = 0;
3623         time->tv_nsec = 0;
3624         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3625                 return -EIO;
3626         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3627                 status = decode_attr_time(xdr, time);
3628                 if (status == 0)
3629                         status = NFS_ATTR_FATTR_CTIME;
3630                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3631         }
3632         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3633         return status;
3634 }
3635
3636 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3637                                   struct timespec *time)
3638 {
3639         int status = 0;
3640
3641         time->tv_sec = 0;
3642         time->tv_nsec = 0;
3643         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3644                 return -EIO;
3645         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3646                 status = decode_attr_time(xdr, time);
3647                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3648         }
3649         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3650                 (long)time->tv_nsec);
3651         return status;
3652 }
3653
3654 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3655 {
3656         int status = 0;
3657
3658         time->tv_sec = 0;
3659         time->tv_nsec = 0;
3660         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3661                 return -EIO;
3662         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3663                 status = decode_attr_time(xdr, time);
3664                 if (status == 0)
3665                         status = NFS_ATTR_FATTR_MTIME;
3666                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3667         }
3668         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3669         return status;
3670 }
3671
3672 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3673 {
3674         unsigned int attrwords = XDR_QUADLEN(attrlen);
3675         unsigned int nwords = xdr->p - savep;
3676
3677         if (unlikely(attrwords != nwords)) {
3678                 dprintk("%s: server returned incorrect attribute length: "
3679                         "%u %c %u\n",
3680                                 __func__,
3681                                 attrwords << 2,
3682                                 (attrwords < nwords) ? '<' : '>',
3683                                 nwords << 2);
3684                 return -EIO;
3685         }
3686         return 0;
3687 }
3688
3689 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3690 {
3691         __be32 *p;
3692
3693         p = xdr_inline_decode(xdr, 20);
3694         if (unlikely(!p))
3695                 goto out_overflow;
3696         cinfo->atomic = be32_to_cpup(p++);
3697         p = xdr_decode_hyper(p, &cinfo->before);
3698         xdr_decode_hyper(p, &cinfo->after);
3699         return 0;
3700 out_overflow:
3701         print_overflow_msg(__func__, xdr);
3702         return -EIO;
3703 }
3704
3705 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3706 {
3707         __be32 *p;
3708         uint32_t supp, acc;
3709         int status;
3710
3711         status = decode_op_hdr(xdr, OP_ACCESS);
3712         if (status)
3713                 return status;
3714         p = xdr_inline_decode(xdr, 8);
3715         if (unlikely(!p))
3716                 goto out_overflow;
3717         supp = be32_to_cpup(p++);
3718         acc = be32_to_cpup(p);
3719         access->supported = supp;
3720         access->access = acc;
3721         return 0;
3722 out_overflow:
3723         print_overflow_msg(__func__, xdr);
3724         return -EIO;
3725 }
3726
3727 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3728 {
3729         __be32 *p;
3730
3731         p = xdr_inline_decode(xdr, len);
3732         if (likely(p)) {
3733                 memcpy(buf, p, len);
3734                 return 0;
3735         }
3736         print_overflow_msg(__func__, xdr);
3737         return -EIO;
3738 }
3739
3740 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3741 {
3742         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3743 }
3744
3745 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3746 {
3747         int status;
3748
3749         status = decode_op_hdr(xdr, OP_CLOSE);
3750         if (status != -EIO)
3751                 nfs_increment_open_seqid(status, res->seqid);
3752         if (!status)
3753                 status = decode_stateid(xdr, &res->stateid);
3754         return status;
3755 }
3756
3757 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3758 {
3759         return decode_opaque_fixed(xdr, verifier, 8);
3760 }
3761
3762 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3763 {
3764         int status;
3765
3766         status = decode_op_hdr(xdr, OP_COMMIT);
3767         if (!status)
3768                 status = decode_verifier(xdr, res->verf->verifier);
3769         return status;
3770 }
3771
3772 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3773 {
3774         __be32 *p;
3775         uint32_t bmlen;
3776         int status;
3777
3778         status = decode_op_hdr(xdr, OP_CREATE);
3779         if (status)
3780                 return status;
3781         if ((status = decode_change_info(xdr, cinfo)))
3782                 return status;
3783         p = xdr_inline_decode(xdr, 4);
3784         if (unlikely(!p))
3785                 goto out_overflow;
3786         bmlen = be32_to_cpup(p);
3787         p = xdr_inline_decode(xdr, bmlen << 2);
3788         if (likely(p))
3789                 return 0;
3790 out_overflow:
3791         print_overflow_msg(__func__, xdr);
3792         return -EIO;
3793 }
3794
3795 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3796 {
3797         __be32 *savep;
3798         uint32_t attrlen, bitmap[2] = {0};
3799         int status;
3800
3801         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3802                 goto xdr_error;
3803         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3804                 goto xdr_error;
3805         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3806                 goto xdr_error;
3807         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3808                 goto xdr_error;
3809         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3810                 goto xdr_error;
3811         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3812                 goto xdr_error;
3813         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3814                 goto xdr_error;
3815         status = verify_attr_len(xdr, savep, attrlen);
3816 xdr_error:
3817         dprintk("%s: xdr returned %d!\n", __func__, -status);
3818         return status;
3819 }
3820
3821 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3822 {
3823         __be32 *savep;
3824         uint32_t attrlen, bitmap[2] = {0};
3825         int status;
3826
3827         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3828                 goto xdr_error;
3829         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3830                 goto xdr_error;
3831         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3832                 goto xdr_error;
3833
3834         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3835                 goto xdr_error;
3836         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3837                 goto xdr_error;
3838         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3839                 goto xdr_error;
3840         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3841                 goto xdr_error;
3842         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3843                 goto xdr_error;
3844         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3845                 goto xdr_error;
3846
3847         status = verify_attr_len(xdr, savep, attrlen);
3848 xdr_error:
3849         dprintk("%s: xdr returned %d!\n", __func__, -status);
3850         return status;
3851 }
3852
3853 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3854 {
3855         __be32 *savep;
3856         uint32_t attrlen, bitmap[2] = {0};
3857         int status;
3858
3859         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3860                 goto xdr_error;
3861         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3862                 goto xdr_error;
3863         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3864                 goto xdr_error;
3865
3866         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3867                 goto xdr_error;
3868         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3869                 goto xdr_error;
3870
3871         status = verify_attr_len(xdr, savep, attrlen);
3872 xdr_error:
3873         dprintk("%s: xdr returned %d!\n", __func__, -status);
3874         return status;
3875 }
3876
3877 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
3878                 struct nfs_fattr *fattr, struct nfs_fh *fh,
3879                 const struct nfs_server *server, int may_sleep)
3880 {
3881         int status;
3882         umode_t fmode = 0;
3883         uint64_t fileid;
3884         uint32_t type;
3885
3886         status = decode_attr_type(xdr, bitmap, &type);
3887         if (status < 0)
3888                 goto xdr_error;
3889         fattr->mode = 0;
3890         if (status != 0) {
3891                 fattr->mode |= nfs_type2fmt[type];
3892                 fattr->valid |= status;
3893         }
3894
3895         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
3896         if (status < 0)
3897                 goto xdr_error;
3898         fattr->valid |= status;
3899
3900         status = decode_attr_size(xdr, bitmap, &fattr->size);
3901         if (status < 0)
3902                 goto xdr_error;
3903         fattr->valid |= status;
3904
3905         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
3906         if (status < 0)
3907                 goto xdr_error;
3908         fattr->valid |= status;
3909
3910         status = decode_attr_error(xdr, bitmap);
3911         if (status < 0)
3912                 goto xdr_error;
3913
3914         status = decode_attr_filehandle(xdr, bitmap, fh);
3915         if (status < 0)
3916                 goto xdr_error;
3917
3918         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
3919         if (status < 0)
3920                 goto xdr_error;
3921         fattr->valid |= status;
3922
3923         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
3924                                                 struct nfs4_fs_locations,
3925                                                 fattr));
3926         if (status < 0)
3927                 goto xdr_error;
3928         fattr->valid |= status;
3929
3930         status = decode_attr_mode(xdr, bitmap, &fmode);
3931         if (status < 0)
3932                 goto xdr_error;
3933         if (status != 0) {
3934                 fattr->mode |= fmode;
3935                 fattr->valid |= status;
3936         }
3937
3938         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
3939         if (status < 0)
3940                 goto xdr_error;
3941         fattr->valid |= status;
3942
3943         status = decode_attr_owner(xdr, bitmap, server->nfs_client,
3944                         &fattr->uid, may_sleep);
3945         if (status < 0)
3946                 goto xdr_error;
3947         fattr->valid |= status;
3948
3949         status = decode_attr_group(xdr, bitmap, server->nfs_client,
3950                         &fattr->gid, may_sleep);
3951         if (status < 0)
3952                 goto xdr_error;
3953         fattr->valid |= status;
3954
3955         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
3956         if (status < 0)
3957                 goto xdr_error;
3958         fattr->valid |= status;
3959
3960         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
3961         if (status < 0)
3962                 goto xdr_error;
3963         fattr->valid |= status;
3964
3965         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
3966         if (status < 0)
3967                 goto xdr_error;
3968         fattr->valid |= status;
3969
3970         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
3971         if (status < 0)
3972                 goto xdr_error;
3973         fattr->valid |= status;
3974
3975         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
3976         if (status < 0)
3977                 goto xdr_error;
3978         fattr->valid |= status;
3979
3980         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
3981         if (status < 0)
3982                 goto xdr_error;
3983         if (status != 0 && !(fattr->valid & status)) {
3984                 fattr->fileid = fileid;
3985                 fattr->valid |= status;
3986         }
3987
3988 xdr_error:
3989         dprintk("%s: xdr returned %d\n", __func__, -status);
3990         return status;
3991 }
3992
3993 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
3994                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
3995 {
3996         __be32 *savep;
3997         uint32_t attrlen,
3998                  bitmap[2] = {0};
3999         int status;
4000
4001         status = decode_op_hdr(xdr, OP_GETATTR);
4002         if (status < 0)
4003                 goto xdr_error;
4004
4005         status = decode_attr_bitmap(xdr, bitmap);
4006         if (status < 0)
4007                 goto xdr_error;
4008
4009         status = decode_attr_length(xdr, &attrlen, &savep);
4010         if (status < 0)
4011                 goto xdr_error;
4012
4013         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4014         if (status < 0)
4015                 goto xdr_error;
4016
4017         status = verify_attr_len(xdr, savep, attrlen);
4018 xdr_error:
4019         dprintk("%s: xdr returned %d\n", __func__, -status);
4020         return status;
4021 }
4022
4023 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4024                 const struct nfs_server *server, int may_sleep)
4025 {
4026         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4027 }
4028
4029 /*
4030  * Decode potentially multiple layout types. Currently we only support
4031  * one layout driver per file system.
4032  */
4033 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4034                                          uint32_t *layouttype)
4035 {
4036         uint32_t *p;
4037         int num;
4038
4039         p = xdr_inline_decode(xdr, 4);
4040         if (unlikely(!p))
4041                 goto out_overflow;
4042         num = be32_to_cpup(p);
4043
4044         /* pNFS is not supported by the underlying file system */
4045         if (num == 0) {
4046                 *layouttype = 0;
4047                 return 0;
4048         }
4049         if (num > 1)
4050                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4051                         "per filesystem not supported\n", __func__);
4052
4053         /* Decode and set first layout type, move xdr->p past unused types */
4054         p = xdr_inline_decode(xdr, num * 4);
4055         if (unlikely(!p))
4056                 goto out_overflow;
4057         *layouttype = be32_to_cpup(p);
4058         return 0;
4059 out_overflow:
4060         print_overflow_msg(__func__, xdr);
4061         return -EIO;
4062 }
4063
4064 /*
4065  * The type of file system exported.
4066  * Note we must ensure that layouttype is set in any non-error case.
4067  */
4068 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4069                                 uint32_t *layouttype)
4070 {
4071         int status = 0;
4072
4073         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4074         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4075                 return -EIO;
4076         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4077                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4078                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4079         } else
4080                 *layouttype = 0;
4081         return status;
4082 }
4083
4084 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4085 {
4086         __be32 *savep;
4087         uint32_t attrlen, bitmap[2];
4088         int status;
4089
4090         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4091                 goto xdr_error;
4092         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4093                 goto xdr_error;
4094         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4095                 goto xdr_error;
4096
4097         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4098
4099         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4100                 goto xdr_error;
4101         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4102                 goto xdr_error;
4103         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4104                 goto xdr_error;
4105         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4106         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4107                 goto xdr_error;
4108         fsinfo->wtpref = fsinfo->wtmax;
4109         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4110         if (status != 0)
4111                 goto xdr_error;
4112         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4113         if (status != 0)
4114                 goto xdr_error;
4115
4116         status = verify_attr_len(xdr, savep, attrlen);
4117 xdr_error:
4118         dprintk("%s: xdr returned %d!\n", __func__, -status);
4119         return status;
4120 }
4121
4122 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4123 {
4124         __be32 *p;
4125         uint32_t len;
4126         int status;
4127
4128         /* Zero handle first to allow comparisons */
4129         memset(fh, 0, sizeof(*fh));
4130
4131         status = decode_op_hdr(xdr, OP_GETFH);
4132         if (status)
4133                 return status;
4134
4135         p = xdr_inline_decode(xdr, 4);
4136         if (unlikely(!p))
4137                 goto out_overflow;
4138         len = be32_to_cpup(p);
4139         if (len > NFS4_FHSIZE)
4140                 return -EIO;
4141         fh->size = len;
4142         p = xdr_inline_decode(xdr, len);
4143         if (unlikely(!p))
4144                 goto out_overflow;
4145         memcpy(fh->data, p, len);
4146         return 0;
4147 out_overflow:
4148         print_overflow_msg(__func__, xdr);
4149         return -EIO;
4150 }
4151
4152 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4153 {
4154         int status;
4155
4156         status = decode_op_hdr(xdr, OP_LINK);
4157         if (status)
4158                 return status;
4159         return decode_change_info(xdr, cinfo);
4160 }
4161
4162 /*
4163  * We create the owner, so we know a proper owner.id length is 4.
4164  */
4165 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4166 {
4167         uint64_t offset, length, clientid;
4168         __be32 *p;
4169         uint32_t namelen, type;
4170
4171         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4172         if (unlikely(!p))
4173                 goto out_overflow;
4174         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4175         p = xdr_decode_hyper(p, &length);
4176         type = be32_to_cpup(p++); /* 4 byte read */
4177         if (fl != NULL) { /* manipulate file lock */
4178                 fl->fl_start = (loff_t)offset;
4179                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4180                 if (length == ~(uint64_t)0)
4181                         fl->fl_end = OFFSET_MAX;
4182                 fl->fl_type = F_WRLCK;
4183                 if (type & 1)
4184                         fl->fl_type = F_RDLCK;
4185                 fl->fl_pid = 0;
4186         }
4187         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4188         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4189         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4190         if (likely(p))
4191                 return -NFS4ERR_DENIED;
4192 out_overflow:
4193         print_overflow_msg(__func__, xdr);
4194         return -EIO;
4195 }
4196
4197 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4198 {
4199         int status;
4200
4201         status = decode_op_hdr(xdr, OP_LOCK);
4202         if (status == -EIO)
4203                 goto out;
4204         if (status == 0) {
4205                 status = decode_stateid(xdr, &res->stateid);
4206                 if (unlikely(status))
4207                         goto out;
4208         } else if (status == -NFS4ERR_DENIED)
4209                 status = decode_lock_denied(xdr, NULL);
4210         if (res->open_seqid != NULL)
4211                 nfs_increment_open_seqid(status, res->open_seqid);
4212         nfs_increment_lock_seqid(status, res->lock_seqid);
4213 out:
4214         return status;
4215 }
4216
4217 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4218 {
4219         int status;
4220         status = decode_op_hdr(xdr, OP_LOCKT);
4221         if (status == -NFS4ERR_DENIED)
4222                 return decode_lock_denied(xdr, res->denied);
4223         return status;
4224 }
4225
4226 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4227 {
4228         int status;
4229
4230         status = decode_op_hdr(xdr, OP_LOCKU);
4231         if (status != -EIO)
4232                 nfs_increment_lock_seqid(status, res->seqid);
4233         if (status == 0)
4234                 status = decode_stateid(xdr, &res->stateid);
4235         return status;
4236 }
4237
4238 static int decode_release_lockowner(struct xdr_stream *xdr)
4239 {
4240         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4241 }
4242
4243 static int decode_lookup(struct xdr_stream *xdr)
4244 {
4245         return decode_op_hdr(xdr, OP_LOOKUP);
4246 }
4247
4248 /* This is too sick! */
4249 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4250 {
4251         __be32 *p;
4252         uint32_t limit_type, nblocks, blocksize;
4253
4254         p = xdr_inline_decode(xdr, 12);
4255         if (unlikely(!p))
4256                 goto out_overflow;
4257         limit_type = be32_to_cpup(p++);
4258         switch (limit_type) {
4259         case 1:
4260                 xdr_decode_hyper(p, maxsize);
4261                 break;
4262         case 2:
4263                 nblocks = be32_to_cpup(p++);
4264                 blocksize = be32_to_cpup(p);
4265                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4266         }
4267         return 0;
4268 out_overflow:
4269         print_overflow_msg(__func__, xdr);
4270         return -EIO;
4271 }
4272
4273 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4274 {
4275         __be32 *p;
4276         uint32_t delegation_type;
4277         int status;
4278
4279         p = xdr_inline_decode(xdr, 4);
4280         if (unlikely(!p))
4281                 goto out_overflow;
4282         delegation_type = be32_to_cpup(p);
4283         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4284                 res->delegation_type = 0;
4285                 return 0;
4286         }
4287         status = decode_stateid(xdr, &res->delegation);
4288         if (unlikely(status))
4289                 return status;
4290         p = xdr_inline_decode(xdr, 4);
4291         if (unlikely(!p))
4292                 goto out_overflow;
4293         res->do_recall = be32_to_cpup(p);
4294
4295         switch (delegation_type) {
4296         case NFS4_OPEN_DELEGATE_READ:
4297                 res->delegation_type = FMODE_READ;
4298                 break;
4299         case NFS4_OPEN_DELEGATE_WRITE:
4300                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4301                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4302                                 return -EIO;
4303         }
4304         return decode_ace(xdr, NULL, res->server->nfs_client);
4305 out_overflow:
4306         print_overflow_msg(__func__, xdr);
4307         return -EIO;
4308 }
4309
4310 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4311 {
4312         __be32 *p;
4313         uint32_t savewords, bmlen, i;
4314         int status;
4315
4316         status = decode_op_hdr(xdr, OP_OPEN);
4317         if (status != -EIO)
4318                 nfs_increment_open_seqid(status, res->seqid);
4319         if (!status)
4320                 status = decode_stateid(xdr, &res->stateid);
4321         if (unlikely(status))
4322                 return status;
4323
4324         decode_change_info(xdr, &res->cinfo);
4325
4326         p = xdr_inline_decode(xdr, 8);
4327         if (unlikely(!p))
4328                 goto out_overflow;
4329         res->rflags = be32_to_cpup(p++);
4330         bmlen = be32_to_cpup(p);
4331         if (bmlen > 10)
4332                 goto xdr_error;
4333
4334         p = xdr_inline_decode(xdr, bmlen << 2);
4335         if (unlikely(!p))
4336                 goto out_overflow;
4337         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4338         for (i = 0; i < savewords; ++i)
4339                 res->attrset[i] = be32_to_cpup(p++);
4340         for (; i < NFS4_BITMAP_SIZE; i++)
4341                 res->attrset[i] = 0;
4342
4343         return decode_delegation(xdr, res);
4344 xdr_error:
4345         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4346         return -EIO;
4347 out_overflow:
4348         print_overflow_msg(__func__, xdr);
4349         return -EIO;
4350 }
4351
4352 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4353 {
4354         int status;
4355
4356         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4357         if (status != -EIO)
4358                 nfs_increment_open_seqid(status, res->seqid);
4359         if (!status)
4360                 status = decode_stateid(xdr, &res->stateid);
4361         return status;
4362 }
4363
4364 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4365 {
4366         int status;
4367
4368         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4369         if (status != -EIO)
4370                 nfs_increment_open_seqid(status, res->seqid);
4371         if (!status)
4372                 status = decode_stateid(xdr, &res->stateid);
4373         return status;
4374 }
4375
4376 static int decode_putfh(struct xdr_stream *xdr)
4377 {
4378         return decode_op_hdr(xdr, OP_PUTFH);
4379 }
4380
4381 static int decode_putrootfh(struct xdr_stream *xdr)
4382 {
4383         return decode_op_hdr(xdr, OP_PUTROOTFH);
4384 }
4385
4386 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4387 {
4388         struct kvec *iov = req->rq_rcv_buf.head;
4389         __be32 *p;
4390         uint32_t count, eof, recvd, hdrlen;
4391         int status;
4392
4393         status = decode_op_hdr(xdr, OP_READ);
4394         if (status)
4395                 return status;
4396         p = xdr_inline_decode(xdr, 8);
4397         if (unlikely(!p))
4398                 goto out_overflow;
4399         eof = be32_to_cpup(p++);
4400         count = be32_to_cpup(p);
4401         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4402         recvd = req->rq_rcv_buf.len - hdrlen;
4403         if (count > recvd) {
4404                 dprintk("NFS: server cheating in read reply: "
4405                                 "count %u > recvd %u\n", count, recvd);
4406                 count = recvd;
4407                 eof = 0;
4408         }
4409         xdr_read_pages(xdr, count);
4410         res->eof = eof;
4411         res->count = count;
4412         return 0;
4413 out_overflow:
4414         print_overflow_msg(__func__, xdr);
4415         return -EIO;
4416 }
4417
4418 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4419 {
4420         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4421         struct kvec     *iov = rcvbuf->head;
4422         size_t          hdrlen;
4423         u32             recvd, pglen = rcvbuf->page_len;
4424         int             status;
4425
4426         status = decode_op_hdr(xdr, OP_READDIR);
4427         if (!status)
4428                 status = decode_verifier(xdr, readdir->verifier.data);
4429         if (unlikely(status))
4430                 return status;
4431         dprintk("%s: verifier = %08x:%08x\n",
4432                         __func__,
4433                         ((u32 *)readdir->verifier.data)[0],
4434                         ((u32 *)readdir->verifier.data)[1]);
4435
4436
4437         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4438         recvd = rcvbuf->len - hdrlen;
4439         if (pglen > recvd)
4440                 pglen = recvd;
4441         xdr_read_pages(xdr, pglen);
4442
4443
4444         return pglen;
4445 }
4446
4447 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4448 {
4449         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4450         struct kvec *iov = rcvbuf->head;
4451         size_t hdrlen;
4452         u32 len, recvd;
4453         __be32 *p;
4454         int status;
4455
4456         status = decode_op_hdr(xdr, OP_READLINK);
4457         if (status)
4458                 return status;
4459
4460         /* Convert length of symlink */
4461         p = xdr_inline_decode(xdr, 4);
4462         if (unlikely(!p))
4463                 goto out_overflow;
4464         len = be32_to_cpup(p);
4465         if (len >= rcvbuf->page_len || len <= 0) {
4466                 dprintk("nfs: server returned giant symlink!\n");
4467                 return -ENAMETOOLONG;
4468         }
4469         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4470         recvd = req->rq_rcv_buf.len - hdrlen;
4471         if (recvd < len) {
4472                 dprintk("NFS: server cheating in readlink reply: "
4473                                 "count %u > recvd %u\n", len, recvd);
4474                 return -EIO;
4475         }
4476         xdr_read_pages(xdr, len);
4477         /*
4478          * The XDR encode routine has set things up so that
4479          * the link text will be copied directly into the
4480          * buffer.  We just have to do overflow-checking,
4481          * and and null-terminate the text (the VFS expects
4482          * null-termination).
4483          */
4484         xdr_terminate_string(rcvbuf, len);
4485         return 0;
4486 out_overflow:
4487         print_overflow_msg(__func__, xdr);
4488         return -EIO;
4489 }
4490
4491 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4492 {
4493         int status;
4494
4495         status = decode_op_hdr(xdr, OP_REMOVE);
4496         if (status)
4497                 goto out;
4498         status = decode_change_info(xdr, cinfo);
4499 out:
4500         return status;
4501 }
4502
4503 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4504               struct nfs4_change_info *new_cinfo)
4505 {
4506         int status;
4507
4508         status = decode_op_hdr(xdr, OP_RENAME);
4509         if (status)
4510                 goto out;
4511         if ((status = decode_change_info(xdr, old_cinfo)))
4512                 goto out;
4513         status = decode_change_info(xdr, new_cinfo);
4514 out:
4515         return status;
4516 }
4517
4518 static int decode_renew(struct xdr_stream *xdr)
4519 {
4520         return decode_op_hdr(xdr, OP_RENEW);
4521 }
4522
4523 static int
4524 decode_restorefh(struct xdr_stream *xdr)
4525 {
4526         return decode_op_hdr(xdr, OP_RESTOREFH);
4527 }
4528
4529 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4530                 size_t *acl_len)
4531 {
4532         __be32 *savep;
4533         uint32_t attrlen,
4534                  bitmap[2] = {0};
4535         struct kvec *iov = req->rq_rcv_buf.head;
4536         int status;
4537
4538         *acl_len = 0;
4539         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4540                 goto out;
4541         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4542                 goto out;
4543         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4544                 goto out;
4545
4546         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4547                 return -EIO;
4548         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4549                 size_t hdrlen;
4550                 u32 recvd;
4551
4552                 /* We ignore &savep and don't do consistency checks on
4553                  * the attr length.  Let userspace figure it out.... */
4554                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4555                 recvd = req->rq_rcv_buf.len - hdrlen;
4556                 if (attrlen > recvd) {
4557                         dprintk("NFS: server cheating in getattr"
4558                                         " acl reply: attrlen %u > recvd %u\n",
4559                                         attrlen, recvd);
4560                         return -EINVAL;
4561                 }
4562                 xdr_read_pages(xdr, attrlen);
4563                 *acl_len = attrlen;
4564         } else
4565                 status = -EOPNOTSUPP;
4566
4567 out:
4568         return status;
4569 }
4570
4571 static int
4572 decode_savefh(struct xdr_stream *xdr)
4573 {
4574         return decode_op_hdr(xdr, OP_SAVEFH);
4575 }
4576
4577 static int decode_setattr(struct xdr_stream *xdr)
4578 {
4579         __be32 *p;
4580         uint32_t bmlen;
4581         int status;
4582
4583         status = decode_op_hdr(xdr, OP_SETATTR);
4584         if (status)
4585                 return status;
4586         p = xdr_inline_decode(xdr, 4);
4587         if (unlikely(!p))
4588                 goto out_overflow;
4589         bmlen = be32_to_cpup(p);
4590         p = xdr_inline_decode(xdr, bmlen << 2);
4591         if (likely(p))
4592                 return 0;
4593 out_overflow:
4594         print_overflow_msg(__func__, xdr);
4595         return -EIO;
4596 }
4597
4598 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4599 {
4600         __be32 *p;
4601         uint32_t opnum;
4602         int32_t nfserr;
4603
4604         p = xdr_inline_decode(xdr, 8);
4605         if (unlikely(!p))
4606                 goto out_overflow;
4607         opnum = be32_to_cpup(p++);
4608         if (opnum != OP_SETCLIENTID) {
4609                 dprintk("nfs: decode_setclientid: Server returned operation"
4610                         " %d\n", opnum);
4611                 return -EIO;
4612         }
4613         nfserr = be32_to_cpup(p);
4614         if (nfserr == NFS_OK) {
4615                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4616                 if (unlikely(!p))
4617                         goto out_overflow;
4618                 p = xdr_decode_hyper(p, &res->clientid);
4619                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4620         } else if (nfserr == NFSERR_CLID_INUSE) {
4621                 uint32_t len;
4622
4623                 /* skip netid string */
4624                 p = xdr_inline_decode(xdr, 4);
4625                 if (unlikely(!p))
4626                         goto out_overflow;
4627                 len = be32_to_cpup(p);
4628                 p = xdr_inline_decode(xdr, len);
4629                 if (unlikely(!p))
4630                         goto out_overflow;
4631
4632                 /* skip uaddr string */
4633                 p = xdr_inline_decode(xdr, 4);
4634                 if (unlikely(!p))
4635                         goto out_overflow;
4636                 len = be32_to_cpup(p);
4637                 p = xdr_inline_decode(xdr, len);
4638                 if (unlikely(!p))
4639                         goto out_overflow;
4640                 return -NFSERR_CLID_INUSE;
4641         } else
4642                 return nfs4_stat_to_errno(nfserr);
4643
4644         return 0;
4645 out_overflow:
4646         print_overflow_msg(__func__, xdr);
4647         return -EIO;
4648 }
4649
4650 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4651 {
4652         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4653 }
4654
4655 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4656 {
4657         __be32 *p;
4658         int status;
4659
4660         status = decode_op_hdr(xdr, OP_WRITE);
4661         if (status)
4662                 return status;
4663
4664         p = xdr_inline_decode(xdr, 16);
4665         if (unlikely(!p))
4666                 goto out_overflow;
4667         res->count = be32_to_cpup(p++);
4668         res->verf->committed = be32_to_cpup(p++);
4669         memcpy(res->verf->verifier, p, 8);
4670         return 0;
4671 out_overflow:
4672         print_overflow_msg(__func__, xdr);
4673         return -EIO;
4674 }
4675
4676 static int decode_delegreturn(struct xdr_stream *xdr)
4677 {
4678         return decode_op_hdr(xdr, OP_DELEGRETURN);
4679 }
4680
4681 #if defined(CONFIG_NFS_V4_1)
4682 static int decode_exchange_id(struct xdr_stream *xdr,
4683                               struct nfs41_exchange_id_res *res)
4684 {
4685         __be32 *p;
4686         uint32_t dummy;
4687         char *dummy_str;
4688         int status;
4689         struct nfs_client *clp = res->client;
4690
4691         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4692         if (status)
4693                 return status;
4694
4695         p = xdr_inline_decode(xdr, 8);
4696         if (unlikely(!p))
4697                 goto out_overflow;
4698         xdr_decode_hyper(p, &clp->cl_ex_clid);
4699         p = xdr_inline_decode(xdr, 12);
4700         if (unlikely(!p))
4701                 goto out_overflow;
4702         clp->cl_seqid = be32_to_cpup(p++);
4703         clp->cl_exchange_flags = be32_to_cpup(p++);
4704
4705         /* We ask for SP4_NONE */
4706         dummy = be32_to_cpup(p);
4707         if (dummy != SP4_NONE)
4708                 return -EIO;
4709
4710         /* Throw away minor_id */
4711         p = xdr_inline_decode(xdr, 8);
4712         if (unlikely(!p))
4713                 goto out_overflow;
4714
4715         /* Throw away Major id */
4716         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4717         if (unlikely(status))
4718                 return status;
4719
4720         /* Throw away server_scope */
4721         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4722         if (unlikely(status))
4723                 return status;
4724
4725         /* Throw away Implementation id array */
4726         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4727         if (unlikely(status))
4728                 return status;
4729
4730         return 0;
4731 out_overflow:
4732         print_overflow_msg(__func__, xdr);
4733         return -EIO;
4734 }
4735
4736 static int decode_chan_attrs(struct xdr_stream *xdr,
4737                              struct nfs4_channel_attrs *attrs)
4738 {
4739         __be32 *p;
4740         u32 nr_attrs;
4741
4742         p = xdr_inline_decode(xdr, 28);
4743         if (unlikely(!p))
4744                 goto out_overflow;
4745         attrs->headerpadsz = be32_to_cpup(p++);
4746         attrs->max_rqst_sz = be32_to_cpup(p++);
4747         attrs->max_resp_sz = be32_to_cpup(p++);
4748         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4749         attrs->max_ops = be32_to_cpup(p++);
4750         attrs->max_reqs = be32_to_cpup(p++);
4751         nr_attrs = be32_to_cpup(p);
4752         if (unlikely(nr_attrs > 1)) {
4753                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4754                         __func__, nr_attrs);
4755                 return -EINVAL;
4756         }
4757         if (nr_attrs == 1) {
4758                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4759                 if (unlikely(!p))
4760                         goto out_overflow;
4761         }
4762         return 0;
4763 out_overflow:
4764         print_overflow_msg(__func__, xdr);
4765         return -EIO;
4766 }
4767
4768 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4769 {
4770         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4771 }
4772
4773 static int decode_create_session(struct xdr_stream *xdr,
4774                                  struct nfs41_create_session_res *res)
4775 {
4776         __be32 *p;
4777         int status;
4778         struct nfs_client *clp = res->client;
4779         struct nfs4_session *session = clp->cl_session;
4780
4781         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4782         if (!status)
4783                 status = decode_sessionid(xdr, &session->sess_id);
4784         if (unlikely(status))
4785                 return status;
4786
4787         /* seqid, flags */
4788         p = xdr_inline_decode(xdr, 8);
4789         if (unlikely(!p))
4790                 goto out_overflow;
4791         clp->cl_seqid = be32_to_cpup(p++);
4792         session->flags = be32_to_cpup(p);
4793
4794         /* Channel attributes */
4795         status = decode_chan_attrs(xdr, &session->fc_attrs);
4796         if (!status)
4797                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4798         return status;
4799 out_overflow:
4800         print_overflow_msg(__func__, xdr);
4801         return -EIO;
4802 }
4803
4804 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4805 {
4806         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4807 }
4808
4809 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
4810 {
4811         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
4812 }
4813 #endif /* CONFIG_NFS_V4_1 */
4814
4815 static int decode_sequence(struct xdr_stream *xdr,
4816                            struct nfs4_sequence_res *res,
4817                            struct rpc_rqst *rqstp)
4818 {
4819 #if defined(CONFIG_NFS_V4_1)
4820         struct nfs4_sessionid id;
4821         u32 dummy;
4822         int status;
4823         __be32 *p;
4824
4825         if (!res->sr_session)
4826                 return 0;
4827
4828         status = decode_op_hdr(xdr, OP_SEQUENCE);
4829         if (!status)
4830                 status = decode_sessionid(xdr, &id);
4831         if (unlikely(status))
4832                 goto out_err;
4833
4834         /*
4835          * If the server returns different values for sessionID, slotID or
4836          * sequence number, the server is looney tunes.
4837          */
4838         status = -EREMOTEIO;
4839
4840         if (memcmp(id.data, res->sr_session->sess_id.data,
4841                    NFS4_MAX_SESSIONID_LEN)) {
4842                 dprintk("%s Invalid session id\n", __func__);
4843                 goto out_err;
4844         }
4845
4846         p = xdr_inline_decode(xdr, 20);
4847         if (unlikely(!p))
4848                 goto out_overflow;
4849
4850         /* seqid */
4851         dummy = be32_to_cpup(p++);
4852         if (dummy != res->sr_slot->seq_nr) {
4853                 dprintk("%s Invalid sequence number\n", __func__);
4854                 goto out_err;
4855         }
4856         /* slot id */
4857         dummy = be32_to_cpup(p++);
4858         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
4859                 dprintk("%s Invalid slot id\n", __func__);
4860                 goto out_err;
4861         }
4862         /* highest slot id - currently not processed */
4863         dummy = be32_to_cpup(p++);
4864         /* target highest slot id - currently not processed */
4865         dummy = be32_to_cpup(p++);
4866         /* result flags */
4867         res->sr_status_flags = be32_to_cpup(p);
4868         status = 0;
4869 out_err:
4870         res->sr_status = status;
4871         return status;
4872 out_overflow:
4873         print_overflow_msg(__func__, xdr);
4874         status = -EIO;
4875         goto out_err;
4876 #else  /* CONFIG_NFS_V4_1 */
4877         return 0;
4878 #endif /* CONFIG_NFS_V4_1 */
4879 }
4880
4881 #if defined(CONFIG_NFS_V4_1)
4882
4883 static int decode_getdeviceinfo(struct xdr_stream *xdr,
4884                                 struct pnfs_device *pdev)
4885 {
4886         __be32 *p;
4887         uint32_t len, type;
4888         int status;
4889
4890         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
4891         if (status) {
4892                 if (status == -ETOOSMALL) {
4893                         p = xdr_inline_decode(xdr, 4);
4894                         if (unlikely(!p))
4895                                 goto out_overflow;
4896                         pdev->mincount = be32_to_cpup(p);
4897                         dprintk("%s: Min count too small. mincnt = %u\n",
4898                                 __func__, pdev->mincount);
4899                 }
4900                 return status;
4901         }
4902
4903         p = xdr_inline_decode(xdr, 8);
4904         if (unlikely(!p))
4905                 goto out_overflow;
4906         type = be32_to_cpup(p++);
4907         if (type != pdev->layout_type) {
4908                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
4909                         __func__, pdev->layout_type, type);
4910                 return -EINVAL;
4911         }
4912         /*
4913          * Get the length of the opaque device_addr4. xdr_read_pages places
4914          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
4915          * and places the remaining xdr data in xdr_buf->tail
4916          */
4917         pdev->mincount = be32_to_cpup(p);
4918         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
4919
4920         /* Parse notification bitmap, verifying that it is zero. */
4921         p = xdr_inline_decode(xdr, 4);
4922         if (unlikely(!p))
4923                 goto out_overflow;
4924         len = be32_to_cpup(p);
4925         if (len) {
4926                 uint32_t i;
4927
4928                 p = xdr_inline_decode(xdr, 4 * len);
4929                 if (unlikely(!p))
4930                         goto out_overflow;
4931                 for (i = 0; i < len; i++, p++) {
4932                         if (be32_to_cpup(p)) {
4933                                 dprintk("%s: notifications not supported\n",
4934                                         __func__);
4935                                 return -EIO;
4936                         }
4937                 }
4938         }
4939         return 0;
4940 out_overflow:
4941         print_overflow_msg(__func__, xdr);
4942         return -EIO;
4943 }
4944
4945 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
4946                             struct nfs4_layoutget_res *res)
4947 {
4948         __be32 *p;
4949         int status;
4950         u32 layout_count;
4951
4952         status = decode_op_hdr(xdr, OP_LAYOUTGET);
4953         if (status)
4954                 return status;
4955         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
4956         if (unlikely(!p))
4957                 goto out_overflow;
4958         res->return_on_close = be32_to_cpup(p++);
4959         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
4960         layout_count = be32_to_cpup(p);
4961         if (!layout_count) {
4962                 dprintk("%s: server responded with empty layout array\n",
4963                         __func__);
4964                 return -EINVAL;
4965         }
4966
4967         p = xdr_inline_decode(xdr, 24);
4968         if (unlikely(!p))
4969                 goto out_overflow;
4970         p = xdr_decode_hyper(p, &res->range.offset);
4971         p = xdr_decode_hyper(p, &res->range.length);
4972         res->range.iomode = be32_to_cpup(p++);
4973         res->type = be32_to_cpup(p++);
4974
4975         status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p);
4976         if (unlikely(status))
4977                 return status;
4978
4979         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
4980                 __func__,
4981                 (unsigned long)res->range.offset,
4982                 (unsigned long)res->range.length,
4983                 res->range.iomode,
4984                 res->type,
4985                 res->layout.len);
4986
4987         /* nfs4_proc_layoutget allocated a single page */
4988         if (res->layout.len > PAGE_SIZE)
4989                 return -ENOMEM;
4990         memcpy(res->layout.buf, p, res->layout.len);
4991
4992         if (layout_count > 1) {
4993                 /* We only handle a length one array at the moment.  Any
4994                  * further entries are just ignored.  Note that this means
4995                  * the client may see a response that is less than the
4996                  * minimum it requested.
4997                  */
4998                 dprintk("%s: server responded with %d layouts, dropping tail\n",
4999                         __func__, layout_count);
5000         }
5001
5002         return 0;
5003 out_overflow:
5004         print_overflow_msg(__func__, xdr);
5005         return -EIO;
5006 }
5007 #endif /* CONFIG_NFS_V4_1 */
5008
5009 /*
5010  * END OF "GENERIC" DECODE ROUTINES.
5011  */
5012
5013 /*
5014  * Decode OPEN_DOWNGRADE response
5015  */
5016 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5017                                        struct xdr_stream *xdr,
5018                                        struct nfs_closeres *res)
5019 {
5020         struct compound_hdr hdr;
5021         int status;
5022
5023         status = decode_compound_hdr(xdr, &hdr);
5024         if (status)
5025                 goto out;
5026         status = decode_sequence(xdr, &res->seq_res, rqstp);
5027         if (status)
5028                 goto out;
5029         status = decode_putfh(xdr);
5030         if (status)
5031                 goto out;
5032         status = decode_open_downgrade(xdr, res);
5033         if (status != 0)
5034                 goto out;
5035         decode_getfattr(xdr, res->fattr, res->server,
5036                         !RPC_IS_ASYNC(rqstp->rq_task));
5037 out:
5038         return status;
5039 }
5040
5041 /*
5042  * Decode ACCESS response
5043  */
5044 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5045                                struct nfs4_accessres *res)
5046 {
5047         struct compound_hdr hdr;
5048         int status;
5049
5050         status = decode_compound_hdr(xdr, &hdr);
5051         if (status)
5052                 goto out;
5053         status = decode_sequence(xdr, &res->seq_res, rqstp);
5054         if (status)
5055                 goto out;
5056         status = decode_putfh(xdr);
5057         if (status != 0)
5058                 goto out;
5059         status = decode_access(xdr, res);
5060         if (status != 0)
5061                 goto out;
5062         decode_getfattr(xdr, res->fattr, res->server,
5063                         !RPC_IS_ASYNC(rqstp->rq_task));
5064 out:
5065         return status;
5066 }
5067
5068 /*
5069  * Decode LOOKUP response
5070  */
5071 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5072                                struct nfs4_lookup_res *res)
5073 {
5074         struct compound_hdr hdr;
5075         int status;
5076
5077         status = decode_compound_hdr(xdr, &hdr);
5078         if (status)
5079                 goto out;
5080         status = decode_sequence(xdr, &res->seq_res, rqstp);
5081         if (status)
5082                 goto out;
5083         status = decode_putfh(xdr);
5084         if (status)
5085                 goto out;
5086         status = decode_lookup(xdr);
5087         if (status)
5088                 goto out;
5089         status = decode_getfh(xdr, res->fh);
5090         if (status)
5091                 goto out;
5092         status = decode_getfattr(xdr, res->fattr, res->server
5093                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5094 out:
5095         return status;
5096 }
5097
5098 /*
5099  * Decode LOOKUP_ROOT response
5100  */
5101 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5102                                     struct xdr_stream *xdr,
5103                                     struct nfs4_lookup_res *res)
5104 {
5105         struct compound_hdr hdr;
5106         int status;
5107
5108         status = decode_compound_hdr(xdr, &hdr);
5109         if (status)
5110                 goto out;
5111         status = decode_sequence(xdr, &res->seq_res, rqstp);
5112         if (status)
5113                 goto out;
5114         status = decode_putrootfh(xdr);
5115         if (status)
5116                 goto out;
5117         status = decode_getfh(xdr, res->fh);
5118         if (status == 0)
5119                 status = decode_getfattr(xdr, res->fattr, res->server,
5120                                 !RPC_IS_ASYNC(rqstp->rq_task));
5121 out:
5122         return status;
5123 }
5124
5125 /*
5126  * Decode REMOVE response
5127  */
5128 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5129                                struct nfs_removeres *res)
5130 {
5131         struct compound_hdr hdr;
5132         int status;
5133
5134         status = decode_compound_hdr(xdr, &hdr);
5135         if (status)
5136                 goto out;
5137         status = decode_sequence(xdr, &res->seq_res, rqstp);
5138         if (status)
5139                 goto out;
5140         status = decode_putfh(xdr);
5141         if (status)
5142                 goto out;
5143         status = decode_remove(xdr, &res->cinfo);
5144         if (status)
5145                 goto out;
5146         decode_getfattr(xdr, res->dir_attr, res->server,
5147                         !RPC_IS_ASYNC(rqstp->rq_task));
5148 out:
5149         return status;
5150 }
5151
5152 /*
5153  * Decode RENAME response
5154  */
5155 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5156                                struct nfs_renameres *res)
5157 {
5158         struct compound_hdr hdr;
5159         int status;
5160
5161         status = decode_compound_hdr(xdr, &hdr);
5162         if (status)
5163                 goto out;
5164         status = decode_sequence(xdr, &res->seq_res, rqstp);
5165         if (status)
5166                 goto out;
5167         status = decode_putfh(xdr);
5168         if (status)
5169                 goto out;
5170         status = decode_savefh(xdr);
5171         if (status)
5172                 goto out;
5173         status = decode_putfh(xdr);
5174         if (status)
5175                 goto out;
5176         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5177         if (status)
5178                 goto out;
5179         /* Current FH is target directory */
5180         if (decode_getfattr(xdr, res->new_fattr, res->server,
5181                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5182                 goto out;
5183         status = decode_restorefh(xdr);
5184         if (status)
5185                 goto out;
5186         decode_getfattr(xdr, res->old_fattr, res->server,
5187                         !RPC_IS_ASYNC(rqstp->rq_task));
5188 out:
5189         return status;
5190 }
5191
5192 /*
5193  * Decode LINK response
5194  */
5195 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5196                              struct nfs4_link_res *res)
5197 {
5198         struct compound_hdr hdr;
5199         int status;
5200
5201         status = decode_compound_hdr(xdr, &hdr);
5202         if (status)
5203                 goto out;
5204         status = decode_sequence(xdr, &res->seq_res, rqstp);
5205         if (status)
5206                 goto out;
5207         status = decode_putfh(xdr);
5208         if (status)
5209                 goto out;
5210         status = decode_savefh(xdr);
5211         if (status)
5212                 goto out;
5213         status = decode_putfh(xdr);
5214         if (status)
5215                 goto out;
5216         status = decode_link(xdr, &res->cinfo);
5217         if (status)
5218                 goto out;
5219         /*
5220          * Note order: OP_LINK leaves the directory as the current
5221          *             filehandle.
5222          */
5223         if (decode_getfattr(xdr, res->dir_attr, res->server,
5224                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5225                 goto out;
5226         status = decode_restorefh(xdr);
5227         if (status)
5228                 goto out;
5229         decode_getfattr(xdr, res->fattr, res->server,
5230                         !RPC_IS_ASYNC(rqstp->rq_task));
5231 out:
5232         return status;
5233 }
5234
5235 /*
5236  * Decode CREATE response
5237  */
5238 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5239                                struct nfs4_create_res *res)
5240 {
5241         struct compound_hdr hdr;
5242         int status;
5243
5244         status = decode_compound_hdr(xdr, &hdr);
5245         if (status)
5246                 goto out;
5247         status = decode_sequence(xdr, &res->seq_res, rqstp);
5248         if (status)
5249                 goto out;
5250         status = decode_putfh(xdr);
5251         if (status)
5252                 goto out;
5253         status = decode_savefh(xdr);
5254         if (status)
5255                 goto out;
5256         status = decode_create(xdr, &res->dir_cinfo);
5257         if (status)
5258                 goto out;
5259         status = decode_getfh(xdr, res->fh);
5260         if (status)
5261                 goto out;
5262         if (decode_getfattr(xdr, res->fattr, res->server,
5263                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5264                 goto out;
5265         status = decode_restorefh(xdr);
5266         if (status)
5267                 goto out;
5268         decode_getfattr(xdr, res->dir_fattr, res->server,
5269                         !RPC_IS_ASYNC(rqstp->rq_task));
5270 out:
5271         return status;
5272 }
5273
5274 /*
5275  * Decode SYMLINK response
5276  */
5277 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5278                                 struct nfs4_create_res *res)
5279 {
5280         return nfs4_xdr_dec_create(rqstp, xdr, res);
5281 }
5282
5283 /*
5284  * Decode GETATTR response
5285  */
5286 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5287                                 struct nfs4_getattr_res *res)
5288 {
5289         struct compound_hdr hdr;
5290         int status;
5291
5292         status = decode_compound_hdr(xdr, &hdr);
5293         if (status)
5294                 goto out;
5295         status = decode_sequence(xdr, &res->seq_res, rqstp);
5296         if (status)
5297                 goto out;
5298         status = decode_putfh(xdr);
5299         if (status)
5300                 goto out;
5301         status = decode_getfattr(xdr, res->fattr, res->server,
5302                         !RPC_IS_ASYNC(rqstp->rq_task));
5303 out:
5304         return status;
5305 }
5306
5307 /*
5308  * Encode an SETACL request
5309  */
5310 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5311                                 struct nfs_setaclargs *args)
5312 {
5313         struct compound_hdr hdr = {
5314                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5315         };
5316
5317         encode_compound_hdr(xdr, req, &hdr);
5318         encode_sequence(xdr, &args->seq_args, &hdr);
5319         encode_putfh(xdr, args->fh, &hdr);
5320         encode_setacl(xdr, args, &hdr);
5321         encode_nops(&hdr);
5322 }
5323
5324 /*
5325  * Decode SETACL response
5326  */
5327 static int
5328 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5329                     struct nfs_setaclres *res)
5330 {
5331         struct compound_hdr hdr;
5332         int status;
5333
5334         status = decode_compound_hdr(xdr, &hdr);
5335         if (status)
5336                 goto out;
5337         status = decode_sequence(xdr, &res->seq_res, rqstp);
5338         if (status)
5339                 goto out;
5340         status = decode_putfh(xdr);
5341         if (status)
5342                 goto out;
5343         status = decode_setattr(xdr);
5344 out:
5345         return status;
5346 }
5347
5348 /*
5349  * Decode GETACL response
5350  */
5351 static int
5352 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5353                     struct nfs_getaclres *res)
5354 {
5355         struct compound_hdr hdr;
5356         int status;
5357
5358         status = decode_compound_hdr(xdr, &hdr);
5359         if (status)
5360                 goto out;
5361         status = decode_sequence(xdr, &res->seq_res, rqstp);
5362         if (status)
5363                 goto out;
5364         status = decode_putfh(xdr);
5365         if (status)
5366                 goto out;
5367         status = decode_getacl(xdr, rqstp, &res->acl_len);
5368
5369 out:
5370         return status;
5371 }
5372
5373 /*
5374  * Decode CLOSE response
5375  */
5376 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5377                               struct nfs_closeres *res)
5378 {
5379         struct compound_hdr hdr;
5380         int status;
5381
5382         status = decode_compound_hdr(xdr, &hdr);
5383         if (status)
5384                 goto out;
5385         status = decode_sequence(xdr, &res->seq_res, rqstp);
5386         if (status)
5387                 goto out;
5388         status = decode_putfh(xdr);
5389         if (status)
5390                 goto out;
5391         status = decode_close(xdr, res);
5392         if (status != 0)
5393                 goto out;
5394         /*
5395          * Note: Server may do delete on close for this file
5396          *      in which case the getattr call will fail with
5397          *      an ESTALE error. Shouldn't be a problem,
5398          *      though, since fattr->valid will remain unset.
5399          */
5400         decode_getfattr(xdr, res->fattr, res->server,
5401                         !RPC_IS_ASYNC(rqstp->rq_task));
5402 out:
5403         return status;
5404 }
5405
5406 /*
5407  * Decode OPEN response
5408  */
5409 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5410                              struct nfs_openres *res)
5411 {
5412         struct compound_hdr hdr;
5413         int status;
5414
5415         status = decode_compound_hdr(xdr, &hdr);
5416         if (status)
5417                 goto out;
5418         status = decode_sequence(xdr, &res->seq_res, rqstp);
5419         if (status)
5420                 goto out;
5421         status = decode_putfh(xdr);
5422         if (status)
5423                 goto out;
5424         status = decode_savefh(xdr);
5425         if (status)
5426                 goto out;
5427         status = decode_open(xdr, res);
5428         if (status)
5429                 goto out;
5430         if (decode_getfh(xdr, &res->fh) != 0)
5431                 goto out;
5432         if (decode_getfattr(xdr, res->f_attr, res->server,
5433                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5434                 goto out;
5435         if (decode_restorefh(xdr) != 0)
5436                 goto out;
5437         decode_getfattr(xdr, res->dir_attr, res->server,
5438                         !RPC_IS_ASYNC(rqstp->rq_task));
5439 out:
5440         return status;
5441 }
5442
5443 /*
5444  * Decode OPEN_CONFIRM response
5445  */
5446 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5447                                      struct xdr_stream *xdr,
5448                                      struct nfs_open_confirmres *res)
5449 {
5450         struct compound_hdr hdr;
5451         int status;
5452
5453         status = decode_compound_hdr(xdr, &hdr);
5454         if (status)
5455                 goto out;
5456         status = decode_putfh(xdr);
5457         if (status)
5458                 goto out;
5459         status = decode_open_confirm(xdr, res);
5460 out:
5461         return status;
5462 }
5463
5464 /*
5465  * Decode OPEN response
5466  */
5467 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5468                                     struct xdr_stream *xdr,
5469                                     struct nfs_openres *res)
5470 {
5471         struct compound_hdr hdr;
5472         int status;
5473
5474         status = decode_compound_hdr(xdr, &hdr);
5475         if (status)
5476                 goto out;
5477         status = decode_sequence(xdr, &res->seq_res, rqstp);
5478         if (status)
5479                 goto out;
5480         status = decode_putfh(xdr);
5481         if (status)
5482                 goto out;
5483         status = decode_open(xdr, res);
5484         if (status)
5485                 goto out;
5486         decode_getfattr(xdr, res->f_attr, res->server,
5487                         !RPC_IS_ASYNC(rqstp->rq_task));
5488 out:
5489         return status;
5490 }
5491
5492 /*
5493  * Decode SETATTR response
5494  */
5495 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5496                                 struct xdr_stream *xdr,
5497                                 struct nfs_setattrres *res)
5498 {
5499         struct compound_hdr hdr;
5500         int status;
5501
5502         status = decode_compound_hdr(xdr, &hdr);
5503         if (status)
5504                 goto out;
5505         status = decode_sequence(xdr, &res->seq_res, rqstp);
5506         if (status)
5507                 goto out;
5508         status = decode_putfh(xdr);
5509         if (status)
5510                 goto out;
5511         status = decode_setattr(xdr);
5512         if (status)
5513                 goto out;
5514         decode_getfattr(xdr, res->fattr, res->server,
5515                         !RPC_IS_ASYNC(rqstp->rq_task));
5516 out:
5517         return status;
5518 }
5519
5520 /*
5521  * Decode LOCK response
5522  */
5523 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5524                              struct nfs_lock_res *res)
5525 {
5526         struct compound_hdr hdr;
5527         int status;
5528
5529         status = decode_compound_hdr(xdr, &hdr);
5530         if (status)
5531                 goto out;
5532         status = decode_sequence(xdr, &res->seq_res, rqstp);
5533         if (status)
5534                 goto out;
5535         status = decode_putfh(xdr);
5536         if (status)
5537                 goto out;
5538         status = decode_lock(xdr, res);
5539 out:
5540         return status;
5541 }
5542
5543 /*
5544  * Decode LOCKT response
5545  */
5546 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5547                               struct nfs_lockt_res *res)
5548 {
5549         struct compound_hdr hdr;
5550         int status;
5551
5552         status = decode_compound_hdr(xdr, &hdr);
5553         if (status)
5554                 goto out;
5555         status = decode_sequence(xdr, &res->seq_res, rqstp);
5556         if (status)
5557                 goto out;
5558         status = decode_putfh(xdr);
5559         if (status)
5560                 goto out;
5561         status = decode_lockt(xdr, res);
5562 out:
5563         return status;
5564 }
5565
5566 /*
5567  * Decode LOCKU response
5568  */
5569 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5570                               struct nfs_locku_res *res)
5571 {
5572         struct compound_hdr hdr;
5573         int status;
5574
5575         status = decode_compound_hdr(xdr, &hdr);
5576         if (status)
5577                 goto out;
5578         status = decode_sequence(xdr, &res->seq_res, rqstp);
5579         if (status)
5580                 goto out;
5581         status = decode_putfh(xdr);
5582         if (status)
5583                 goto out;
5584         status = decode_locku(xdr, res);
5585 out:
5586         return status;
5587 }
5588
5589 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5590                                           struct xdr_stream *xdr, void *dummy)
5591 {
5592         struct compound_hdr hdr;
5593         int status;
5594
5595         status = decode_compound_hdr(xdr, &hdr);
5596         if (!status)
5597                 status = decode_release_lockowner(xdr);
5598         return status;
5599 }
5600
5601 /*
5602  * Decode READLINK response
5603  */
5604 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5605                                  struct xdr_stream *xdr,
5606                                  struct nfs4_readlink_res *res)
5607 {
5608         struct compound_hdr hdr;
5609         int status;
5610
5611         status = decode_compound_hdr(xdr, &hdr);
5612         if (status)
5613                 goto out;
5614         status = decode_sequence(xdr, &res->seq_res, rqstp);
5615         if (status)
5616                 goto out;
5617         status = decode_putfh(xdr);
5618         if (status)
5619                 goto out;
5620         status = decode_readlink(xdr, rqstp);
5621 out:
5622         return status;
5623 }
5624
5625 /*
5626  * Decode READDIR response
5627  */
5628 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5629                                 struct nfs4_readdir_res *res)
5630 {
5631         struct compound_hdr hdr;
5632         int status;
5633
5634         status = decode_compound_hdr(xdr, &hdr);
5635         if (status)
5636                 goto out;
5637         status = decode_sequence(xdr, &res->seq_res, rqstp);
5638         if (status)
5639                 goto out;
5640         status = decode_putfh(xdr);
5641         if (status)
5642                 goto out;
5643         status = decode_readdir(xdr, rqstp, res);
5644 out:
5645         return status;
5646 }
5647
5648 /*
5649  * Decode Read response
5650  */
5651 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5652                              struct nfs_readres *res)
5653 {
5654         struct compound_hdr hdr;
5655         int status;
5656
5657         status = decode_compound_hdr(xdr, &hdr);
5658         if (status)
5659                 goto out;
5660         status = decode_sequence(xdr, &res->seq_res, rqstp);
5661         if (status)
5662                 goto out;
5663         status = decode_putfh(xdr);
5664         if (status)
5665                 goto out;
5666         status = decode_read(xdr, rqstp, res);
5667         if (!status)
5668                 status = res->count;
5669 out:
5670         return status;
5671 }
5672
5673 /*
5674  * Decode WRITE response
5675  */
5676 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5677                               struct nfs_writeres *res)
5678 {
5679         struct compound_hdr hdr;
5680         int status;
5681
5682         status = decode_compound_hdr(xdr, &hdr);
5683         if (status)
5684                 goto out;
5685         status = decode_sequence(xdr, &res->seq_res, rqstp);
5686         if (status)
5687                 goto out;
5688         status = decode_putfh(xdr);
5689         if (status)
5690                 goto out;
5691         status = decode_write(xdr, res);
5692         if (status)
5693                 goto out;
5694         decode_getfattr(xdr, res->fattr, res->server,
5695                         !RPC_IS_ASYNC(rqstp->rq_task));
5696         if (!status)
5697                 status = res->count;
5698 out:
5699         return status;
5700 }
5701
5702 /*
5703  * Decode COMMIT response
5704  */
5705 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5706                                struct nfs_writeres *res)
5707 {
5708         struct compound_hdr hdr;
5709         int status;
5710
5711         status = decode_compound_hdr(xdr, &hdr);
5712         if (status)
5713                 goto out;
5714         status = decode_sequence(xdr, &res->seq_res, rqstp);
5715         if (status)
5716                 goto out;
5717         status = decode_putfh(xdr);
5718         if (status)
5719                 goto out;
5720         status = decode_commit(xdr, res);
5721         if (status)
5722                 goto out;
5723         decode_getfattr(xdr, res->fattr, res->server,
5724                         !RPC_IS_ASYNC(rqstp->rq_task));
5725 out:
5726         return status;
5727 }
5728
5729 /*
5730  * Decode FSINFO response
5731  */
5732 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5733                                struct nfs4_fsinfo_res *res)
5734 {
5735         struct compound_hdr hdr;
5736         int status;
5737
5738         status = decode_compound_hdr(xdr, &hdr);
5739         if (!status)
5740                 status = decode_sequence(xdr, &res->seq_res, req);
5741         if (!status)
5742                 status = decode_putfh(xdr);
5743         if (!status)
5744                 status = decode_fsinfo(xdr, res->fsinfo);
5745         return status;
5746 }
5747
5748 /*
5749  * Decode PATHCONF response
5750  */
5751 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5752                                  struct nfs4_pathconf_res *res)
5753 {
5754         struct compound_hdr hdr;
5755         int status;
5756
5757         status = decode_compound_hdr(xdr, &hdr);
5758         if (!status)
5759                 status = decode_sequence(xdr, &res->seq_res, req);
5760         if (!status)
5761                 status = decode_putfh(xdr);
5762         if (!status)
5763                 status = decode_pathconf(xdr, res->pathconf);
5764         return status;
5765 }
5766
5767 /*
5768  * Decode STATFS response
5769  */
5770 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5771                                struct nfs4_statfs_res *res)
5772 {
5773         struct compound_hdr hdr;
5774         int status;
5775
5776         status = decode_compound_hdr(xdr, &hdr);
5777         if (!status)
5778                 status = decode_sequence(xdr, &res->seq_res, req);
5779         if (!status)
5780                 status = decode_putfh(xdr);
5781         if (!status)
5782                 status = decode_statfs(xdr, res->fsstat);
5783         return status;
5784 }
5785
5786 /*
5787  * Decode GETATTR_BITMAP response
5788  */
5789 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
5790                                     struct xdr_stream *xdr,
5791                                     struct nfs4_server_caps_res *res)
5792 {
5793         struct compound_hdr hdr;
5794         int status;
5795
5796         status = decode_compound_hdr(xdr, &hdr);
5797         if (status)
5798                 goto out;
5799         status = decode_sequence(xdr, &res->seq_res, req);
5800         if (status)
5801                 goto out;
5802         status = decode_putfh(xdr);
5803         if (status)
5804                 goto out;
5805         status = decode_server_caps(xdr, res);
5806 out:
5807         return status;
5808 }
5809
5810 /*
5811  * Decode RENEW response
5812  */
5813 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5814                               void *__unused)
5815 {
5816         struct compound_hdr hdr;
5817         int status;
5818
5819         status = decode_compound_hdr(xdr, &hdr);
5820         if (!status)
5821                 status = decode_renew(xdr);
5822         return status;
5823 }
5824
5825 /*
5826  * Decode SETCLIENTID response
5827  */
5828 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
5829                                     struct xdr_stream *xdr,
5830                                     struct nfs4_setclientid_res *res)
5831 {
5832         struct compound_hdr hdr;
5833         int status;
5834
5835         status = decode_compound_hdr(xdr, &hdr);
5836         if (!status)
5837                 status = decode_setclientid(xdr, res);
5838         return status;
5839 }
5840
5841 /*
5842  * Decode SETCLIENTID_CONFIRM response
5843  */
5844 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
5845                                             struct xdr_stream *xdr,
5846                                             struct nfs_fsinfo *fsinfo)
5847 {
5848         struct compound_hdr hdr;
5849         int status;
5850
5851         status = decode_compound_hdr(xdr, &hdr);
5852         if (!status)
5853                 status = decode_setclientid_confirm(xdr);
5854         if (!status)
5855                 status = decode_putrootfh(xdr);
5856         if (!status)
5857                 status = decode_fsinfo(xdr, fsinfo);
5858         return status;
5859 }
5860
5861 /*
5862  * Decode DELEGRETURN response
5863  */
5864 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
5865                                     struct xdr_stream *xdr,
5866                                     struct nfs4_delegreturnres *res)
5867 {
5868         struct compound_hdr hdr;
5869         int status;
5870
5871         status = decode_compound_hdr(xdr, &hdr);
5872         if (status)
5873                 goto out;
5874         status = decode_sequence(xdr, &res->seq_res, rqstp);
5875         if (status)
5876                 goto out;
5877         status = decode_putfh(xdr);
5878         if (status != 0)
5879                 goto out;
5880         status = decode_delegreturn(xdr);
5881         if (status != 0)
5882                 goto out;
5883         decode_getfattr(xdr, res->fattr, res->server,
5884                         !RPC_IS_ASYNC(rqstp->rq_task));
5885 out:
5886         return status;
5887 }
5888
5889 /*
5890  * Decode FS_LOCATIONS response
5891  */
5892 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
5893                                      struct xdr_stream *xdr,
5894                                      struct nfs4_fs_locations_res *res)
5895 {
5896         struct compound_hdr hdr;
5897         int status;
5898
5899         status = decode_compound_hdr(xdr, &hdr);
5900         if (status)
5901                 goto out;
5902         status = decode_sequence(xdr, &res->seq_res, req);
5903         if (status)
5904                 goto out;
5905         status = decode_putfh(xdr);
5906         if (status)
5907                 goto out;
5908         status = decode_lookup(xdr);
5909         if (status)
5910                 goto out;
5911         xdr_enter_page(xdr, PAGE_SIZE);
5912         status = decode_getfattr(xdr, &res->fs_locations->fattr,
5913                                  res->fs_locations->server,
5914                                  !RPC_IS_ASYNC(req->rq_task));
5915 out:
5916         return status;
5917 }
5918
5919 #if defined(CONFIG_NFS_V4_1)
5920 /*
5921  * Decode EXCHANGE_ID response
5922  */
5923 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
5924                                     struct xdr_stream *xdr,
5925                                     void *res)
5926 {
5927         struct compound_hdr hdr;
5928         int status;
5929
5930         status = decode_compound_hdr(xdr, &hdr);
5931         if (!status)
5932                 status = decode_exchange_id(xdr, res);
5933         return status;
5934 }
5935
5936 /*
5937  * Decode CREATE_SESSION response
5938  */
5939 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
5940                                        struct xdr_stream *xdr,
5941                                        struct nfs41_create_session_res *res)
5942 {
5943         struct compound_hdr hdr;
5944         int status;
5945
5946         status = decode_compound_hdr(xdr, &hdr);
5947         if (!status)
5948                 status = decode_create_session(xdr, res);
5949         return status;
5950 }
5951
5952 /*
5953  * Decode DESTROY_SESSION response
5954  */
5955 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
5956                                         struct xdr_stream *xdr,
5957                                         void *res)
5958 {
5959         struct compound_hdr hdr;
5960         int status;
5961
5962         status = decode_compound_hdr(xdr, &hdr);
5963         if (!status)
5964                 status = decode_destroy_session(xdr, res);
5965         return status;
5966 }
5967
5968 /*
5969  * Decode SEQUENCE response
5970  */
5971 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
5972                                  struct xdr_stream *xdr,
5973                                  struct nfs4_sequence_res *res)
5974 {
5975         struct compound_hdr hdr;
5976         int status;
5977
5978         status = decode_compound_hdr(xdr, &hdr);
5979         if (!status)
5980                 status = decode_sequence(xdr, res, rqstp);
5981         return status;
5982 }
5983
5984 /*
5985  * Decode GET_LEASE_TIME response
5986  */
5987 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
5988                                        struct xdr_stream *xdr,
5989                                        struct nfs4_get_lease_time_res *res)
5990 {
5991         struct compound_hdr hdr;
5992         int status;
5993
5994         status = decode_compound_hdr(xdr, &hdr);
5995         if (!status)
5996                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
5997         if (!status)
5998                 status = decode_putrootfh(xdr);
5999         if (!status)
6000                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6001         return status;
6002 }
6003
6004 /*
6005  * Decode RECLAIM_COMPLETE response
6006  */
6007 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6008                                          struct xdr_stream *xdr,
6009                                          struct nfs41_reclaim_complete_res *res)
6010 {
6011         struct compound_hdr hdr;
6012         int status;
6013
6014         status = decode_compound_hdr(xdr, &hdr);
6015         if (!status)
6016                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6017         if (!status)
6018                 status = decode_reclaim_complete(xdr, (void *)NULL);
6019         return status;
6020 }
6021
6022 /*
6023  * Decode GETDEVINFO response
6024  */
6025 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6026                                       struct xdr_stream *xdr,
6027                                       struct nfs4_getdeviceinfo_res *res)
6028 {
6029         struct compound_hdr hdr;
6030         int status;
6031
6032         status = decode_compound_hdr(xdr, &hdr);
6033         if (status != 0)
6034                 goto out;
6035         status = decode_sequence(xdr, &res->seq_res, rqstp);
6036         if (status != 0)
6037                 goto out;
6038         status = decode_getdeviceinfo(xdr, res->pdev);
6039 out:
6040         return status;
6041 }
6042
6043 /*
6044  * Decode LAYOUTGET response
6045  */
6046 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6047                                   struct xdr_stream *xdr,
6048                                   struct nfs4_layoutget_res *res)
6049 {
6050         struct compound_hdr hdr;
6051         int status;
6052
6053         status = decode_compound_hdr(xdr, &hdr);
6054         if (status)
6055                 goto out;
6056         status = decode_sequence(xdr, &res->seq_res, rqstp);
6057         if (status)
6058                 goto out;
6059         status = decode_putfh(xdr);
6060         if (status)
6061                 goto out;
6062         status = decode_layoutget(xdr, rqstp, res);
6063 out:
6064         return status;
6065 }
6066 #endif /* CONFIG_NFS_V4_1 */
6067
6068 /**
6069  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6070  *                      the local page cache.
6071  * @xdr: XDR stream where entry resides
6072  * @entry: buffer to fill in with entry data
6073  * @plus: boolean indicating whether this should be a readdirplus entry
6074  *
6075  * Returns zero if successful, otherwise a negative errno value is
6076  * returned.
6077  *
6078  * This function is not invoked during READDIR reply decoding, but
6079  * rather whenever an application invokes the getdents(2) system call
6080  * on a directory already in our cache.
6081  */
6082 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6083                        int plus)
6084 {
6085         uint32_t bitmap[2] = {0};
6086         uint32_t len;
6087         __be32 *p = xdr_inline_decode(xdr, 4);
6088         if (unlikely(!p))
6089                 goto out_overflow;
6090         if (!ntohl(*p++)) {
6091                 p = xdr_inline_decode(xdr, 4);
6092                 if (unlikely(!p))
6093                         goto out_overflow;
6094                 if (!ntohl(*p++))
6095                         return -EAGAIN;
6096                 entry->eof = 1;
6097                 return -EBADCOOKIE;
6098         }
6099
6100         p = xdr_inline_decode(xdr, 12);
6101         if (unlikely(!p))
6102                 goto out_overflow;
6103         entry->prev_cookie = entry->cookie;
6104         p = xdr_decode_hyper(p, &entry->cookie);
6105         entry->len = ntohl(*p++);
6106
6107         p = xdr_inline_decode(xdr, entry->len);
6108         if (unlikely(!p))
6109                 goto out_overflow;
6110         entry->name = (const char *) p;
6111
6112         /*
6113          * In case the server doesn't return an inode number,
6114          * we fake one here.  (We don't use inode number 0,
6115          * since glibc seems to choke on it...)
6116          */
6117         entry->ino = 1;
6118         entry->fattr->valid = 0;
6119
6120         if (decode_attr_bitmap(xdr, bitmap) < 0)
6121                 goto out_overflow;
6122
6123         if (decode_attr_length(xdr, &len, &p) < 0)
6124                 goto out_overflow;
6125
6126         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6127                                         entry->server, 1) < 0)
6128                 goto out_overflow;
6129         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6130                 entry->ino = entry->fattr->fileid;
6131
6132         entry->d_type = DT_UNKNOWN;
6133         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6134                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6135
6136         if (verify_attr_len(xdr, p, len) < 0)
6137                 goto out_overflow;
6138
6139         p = xdr_inline_peek(xdr, 8);
6140         if (p != NULL)
6141                 entry->eof = !p[0] && p[1];
6142         else
6143                 entry->eof = 0;
6144
6145         return 0;
6146
6147 out_overflow:
6148         print_overflow_msg(__func__, xdr);
6149         return -EAGAIN;
6150 }
6151
6152 /*
6153  * We need to translate between nfs status return values and
6154  * the local errno values which may not be the same.
6155  */
6156 static struct {
6157         int stat;
6158         int errno;
6159 } nfs_errtbl[] = {
6160         { NFS4_OK,              0               },
6161         { NFS4ERR_PERM,         -EPERM          },
6162         { NFS4ERR_NOENT,        -ENOENT         },
6163         { NFS4ERR_IO,           -errno_NFSERR_IO},
6164         { NFS4ERR_NXIO,         -ENXIO          },
6165         { NFS4ERR_ACCESS,       -EACCES         },
6166         { NFS4ERR_EXIST,        -EEXIST         },
6167         { NFS4ERR_XDEV,         -EXDEV          },
6168         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6169         { NFS4ERR_ISDIR,        -EISDIR         },
6170         { NFS4ERR_INVAL,        -EINVAL         },
6171         { NFS4ERR_FBIG,         -EFBIG          },
6172         { NFS4ERR_NOSPC,        -ENOSPC         },
6173         { NFS4ERR_ROFS,         -EROFS          },
6174         { NFS4ERR_MLINK,        -EMLINK         },
6175         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6176         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6177         { NFS4ERR_DQUOT,        -EDQUOT         },
6178         { NFS4ERR_STALE,        -ESTALE         },
6179         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6180         { NFS4ERR_BADOWNER,     -EINVAL         },
6181         { NFS4ERR_BADNAME,      -EINVAL         },
6182         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6183         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6184         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6185         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6186         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6187         { NFS4ERR_LOCKED,       -EAGAIN         },
6188         { NFS4ERR_SYMLINK,      -ELOOP          },
6189         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6190         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6191         { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
6192                                                     * to be handled by a
6193                                                     * middle-layer.
6194                                                     */
6195         { -1,                   -EIO            }
6196 };
6197
6198 /*
6199  * Convert an NFS error code to a local one.
6200  * This one is used jointly by NFSv2 and NFSv3.
6201  */
6202 static int
6203 nfs4_stat_to_errno(int stat)
6204 {
6205         int i;
6206         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6207                 if (nfs_errtbl[i].stat == stat)
6208                         return nfs_errtbl[i].errno;
6209         }
6210         if (stat <= 10000 || stat > 10100) {
6211                 /* The server is looney tunes. */
6212                 return -EREMOTEIO;
6213         }
6214         /* If we cannot translate the error, the recovery routines should
6215          * handle it.
6216          * Note: remaining NFSv4 error codes have values > 10000, so should
6217          * not conflict with native Linux error codes.
6218          */
6219         return -stat;
6220 }
6221
6222 #define PROC(proc, argtype, restype)                            \
6223 [NFSPROC4_CLNT_##proc] = {                                      \
6224         .p_proc   = NFSPROC4_COMPOUND,                          \
6225         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6226         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6227         .p_arglen = NFS4_##argtype##_sz,                        \
6228         .p_replen = NFS4_##restype##_sz,                        \
6229         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6230         .p_name   = #proc,                                      \
6231 }
6232
6233 struct rpc_procinfo     nfs4_procedures[] = {
6234         PROC(READ,              enc_read,               dec_read),
6235         PROC(WRITE,             enc_write,              dec_write),
6236         PROC(COMMIT,            enc_commit,             dec_commit),
6237         PROC(OPEN,              enc_open,               dec_open),
6238         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6239         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6240         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6241         PROC(CLOSE,             enc_close,              dec_close),
6242         PROC(SETATTR,           enc_setattr,            dec_setattr),
6243         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6244         PROC(RENEW,             enc_renew,              dec_renew),
6245         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6246         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6247         PROC(LOCK,              enc_lock,               dec_lock),
6248         PROC(LOCKT,             enc_lockt,              dec_lockt),
6249         PROC(LOCKU,             enc_locku,              dec_locku),
6250         PROC(ACCESS,            enc_access,             dec_access),
6251         PROC(GETATTR,           enc_getattr,            dec_getattr),
6252         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6253         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6254         PROC(REMOVE,            enc_remove,             dec_remove),
6255         PROC(RENAME,            enc_rename,             dec_rename),
6256         PROC(LINK,              enc_link,               dec_link),
6257         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6258         PROC(CREATE,            enc_create,             dec_create),
6259         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6260         PROC(STATFS,            enc_statfs,             dec_statfs),
6261         PROC(READLINK,          enc_readlink,           dec_readlink),
6262         PROC(READDIR,           enc_readdir,            dec_readdir),
6263         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6264         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6265         PROC(GETACL,            enc_getacl,             dec_getacl),
6266         PROC(SETACL,            enc_setacl,             dec_setacl),
6267         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6268         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6269 #if defined(CONFIG_NFS_V4_1)
6270         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6271         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6272         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6273         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6274         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6275         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6276         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6277         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6278 #endif /* CONFIG_NFS_V4_1 */
6279 };
6280
6281 struct rpc_version              nfs_version4 = {
6282         .number                 = 4,
6283         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6284         .procs                  = nfs4_procedures
6285 };
6286
6287 /*
6288  * Local variables:
6289  *  c-basic-offset: 8
6290  * End:
6291  */