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/sunrpc/gss_api.h>
  50 #include <linux/nfs.h>
  51 #include <linux/nfs4.h>
  52 #include <linux/nfs_fs.h>
  53 #include <linux/nfs_idmap.h>
  54 #include "nfs4_fs.h"
  55 #include "internal.h"
  56 #include "pnfs.h"
  57
  58 #define NFSDBG_FACILITY         NFSDBG_XDR
  59
  60 /* Mapping from NFS error code to "errno" error code. */
  61 #define errno_NFSERR_IO         EIO
  62
  63 static int nfs4_stat_to_errno(int);
  64
  65 /* NFSv4 COMPOUND tags are only wanted for debugging purposes */
  66 #ifdef DEBUG
  67 #define NFS4_MAXTAGLEN          20
  68 #else
  69 #define NFS4_MAXTAGLEN          0
  70 #endif
  71
  72 /* lock,open owner id:
  73  * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  74  */
  75 #define open_owner_id_maxsz     (1 + 1 + 4)
  76 #define lock_owner_id_maxsz     (1 + 1 + 4)
  77 #define decode_lockowner_maxsz  (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  78 #define compound_encode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  79 #define compound_decode_hdr_maxsz       (3 + (NFS4_MAXTAGLEN >> 2))
  80 #define op_encode_hdr_maxsz     (1)
  81 #define op_decode_hdr_maxsz     (2)
  82 #define encode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  83 #define decode_stateid_maxsz    (XDR_QUADLEN(NFS4_STATEID_SIZE))
  84 #define encode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  85 #define decode_verifier_maxsz   (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
  86 #define encode_putfh_maxsz      (op_encode_hdr_maxsz + 1 + \
  87                                 (NFS4_FHSIZE >> 2))
  88 #define decode_putfh_maxsz      (op_decode_hdr_maxsz)
  89 #define encode_putrootfh_maxsz  (op_encode_hdr_maxsz)
  90 #define decode_putrootfh_maxsz  (op_decode_hdr_maxsz)
  91 #define encode_getfh_maxsz      (op_encode_hdr_maxsz)
  92 #define decode_getfh_maxsz      (op_decode_hdr_maxsz + 1 + \
  93                                 ((3+NFS4_FHSIZE) >> 2))
  94 #define nfs4_fattr_bitmap_maxsz 3
  95 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
  96 #define nfs4_name_maxsz         (1 + ((3 + NFS4_MAXNAMLEN) >> 2))
  97 #define nfs4_path_maxsz         (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
  98 #define nfs4_owner_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
  99 #define nfs4_group_maxsz        (1 + XDR_QUADLEN(IDMAP_NAMESZ))
 100 /* This is based on getfattr, which uses the most attributes: */
 101 #define nfs4_fattr_value_maxsz  (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
 102                                 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 103 #define nfs4_fattr_maxsz        (nfs4_fattr_bitmap_maxsz + \
 104                                 nfs4_fattr_value_maxsz)
 105 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
 106 #define encode_attrs_maxsz      (nfs4_fattr_bitmap_maxsz + \
 107                                  1 + 2 + 1 + \
 108                                 nfs4_owner_maxsz + \
 109                                 nfs4_group_maxsz + \
 110                                 4 + 4)
 111 #define encode_savefh_maxsz     (op_encode_hdr_maxsz)
 112 #define decode_savefh_maxsz     (op_decode_hdr_maxsz)
 113 #define encode_restorefh_maxsz  (op_encode_hdr_maxsz)
 114 #define decode_restorefh_maxsz  (op_decode_hdr_maxsz)
 115 #define encode_fsinfo_maxsz     (encode_getattr_maxsz)
 116 #define decode_fsinfo_maxsz     (op_decode_hdr_maxsz + 15)
 117 #define encode_renew_maxsz      (op_encode_hdr_maxsz + 3)
 118 #define decode_renew_maxsz      (op_decode_hdr_maxsz)
 119 #define encode_setclientid_maxsz \
 120                                 (op_encode_hdr_maxsz + \
 121                                 XDR_QUADLEN(NFS4_VERIFIER_SIZE) + \
 122                                 XDR_QUADLEN(NFS4_SETCLIENTID_NAMELEN) + \
 123                                 1 /* sc_prog */ + \
 124                                 XDR_QUADLEN(RPCBIND_MAXNETIDLEN) + \
 125                                 XDR_QUADLEN(RPCBIND_MAXUADDRLEN) + \
 126                                 1) /* sc_cb_ident */
 127 #define decode_setclientid_maxsz \
 128                                 (op_decode_hdr_maxsz + \
 129                                 2 + \
 130                                 1024) /* large value for CLID_INUSE */
 131 #define encode_setclientid_confirm_maxsz \
 132                                 (op_encode_hdr_maxsz + \
 133                                 3 + (NFS4_VERIFIER_SIZE >> 2))
 134 #define decode_setclientid_confirm_maxsz \
 135                                 (op_decode_hdr_maxsz)
 136 #define encode_lookup_maxsz     (op_encode_hdr_maxsz + nfs4_name_maxsz)
 137 #define decode_lookup_maxsz     (op_decode_hdr_maxsz)
 138 #define encode_share_access_maxsz \
 139                                 (2)
 140 #define encode_createmode_maxsz (1 + encode_attrs_maxsz + encode_verifier_maxsz)
 141 #define encode_opentype_maxsz   (1 + encode_createmode_maxsz)
 142 #define encode_claim_null_maxsz (1 + nfs4_name_maxsz)
 143 #define encode_open_maxsz       (op_encode_hdr_maxsz + \
 144                                 2 + encode_share_access_maxsz + 2 + \
 145                                 open_owner_id_maxsz + \
 146                                 encode_opentype_maxsz + \
 147                                 encode_claim_null_maxsz)
 148 #define decode_ace_maxsz        (3 + nfs4_owner_maxsz)
 149 #define decode_delegation_maxsz (1 + decode_stateid_maxsz + 1 + \
 150                                 decode_ace_maxsz)
 151 #define decode_change_info_maxsz        (5)
 152 #define decode_open_maxsz       (op_decode_hdr_maxsz + \
 153                                 decode_stateid_maxsz + \
 154                                 decode_change_info_maxsz + 1 + \
 155                                 nfs4_fattr_bitmap_maxsz + \
 156                                 decode_delegation_maxsz)
 157 #define encode_open_confirm_maxsz \
 158                                 (op_encode_hdr_maxsz + \
 159                                  encode_stateid_maxsz + 1)
 160 #define decode_open_confirm_maxsz \
 161                                 (op_decode_hdr_maxsz + \
 162                                  decode_stateid_maxsz)
 163 #define encode_open_downgrade_maxsz \
 164                                 (op_encode_hdr_maxsz + \
 165                                  encode_stateid_maxsz + 1 + \
 166                                  encode_share_access_maxsz)
 167 #define decode_open_downgrade_maxsz \
 168                                 (op_decode_hdr_maxsz + \
 169                                  decode_stateid_maxsz)
 170 #define encode_close_maxsz      (op_encode_hdr_maxsz + \
 171                                  1 + encode_stateid_maxsz)
 172 #define decode_close_maxsz      (op_decode_hdr_maxsz + \
 173                                  decode_stateid_maxsz)
 174 #define encode_setattr_maxsz    (op_encode_hdr_maxsz + \
 175                                  encode_stateid_maxsz + \
 176                                  encode_attrs_maxsz)
 177 #define decode_setattr_maxsz    (op_decode_hdr_maxsz + \
 178                                  nfs4_fattr_bitmap_maxsz)
 179 #define encode_read_maxsz       (op_encode_hdr_maxsz + \
 180                                  encode_stateid_maxsz + 3)
 181 #define decode_read_maxsz       (op_decode_hdr_maxsz + 2)
 182 #define encode_readdir_maxsz    (op_encode_hdr_maxsz + \
 183                                  2 + encode_verifier_maxsz + 5)
 184 #define decode_readdir_maxsz    (op_decode_hdr_maxsz + \
 185                                  decode_verifier_maxsz)
 186 #define encode_readlink_maxsz   (op_encode_hdr_maxsz)
 187 #define decode_readlink_maxsz   (op_decode_hdr_maxsz + 1)
 188 #define encode_write_maxsz      (op_encode_hdr_maxsz + \
 189                                  encode_stateid_maxsz + 4)
 190 #define decode_write_maxsz      (op_decode_hdr_maxsz + \
 191                                  2 + decode_verifier_maxsz)
 192 #define encode_commit_maxsz     (op_encode_hdr_maxsz + 3)
 193 #define decode_commit_maxsz     (op_decode_hdr_maxsz + \
 194                                  decode_verifier_maxsz)
 195 #define encode_remove_maxsz     (op_encode_hdr_maxsz + \
 196                                 nfs4_name_maxsz)
 197 #define decode_remove_maxsz     (op_decode_hdr_maxsz + \
 198                                  decode_change_info_maxsz)
 199 #define encode_rename_maxsz     (op_encode_hdr_maxsz + \
 200                                 2 * nfs4_name_maxsz)
 201 #define decode_rename_maxsz     (op_decode_hdr_maxsz + \
 202                                  decode_change_info_maxsz + \
 203                                  decode_change_info_maxsz)
 204 #define encode_link_maxsz       (op_encode_hdr_maxsz + \
 205                                 nfs4_name_maxsz)
 206 #define decode_link_maxsz       (op_decode_hdr_maxsz + decode_change_info_maxsz)
 207 #define encode_lockowner_maxsz  (7)
 208 #define encode_lock_maxsz       (op_encode_hdr_maxsz + \
 209                                  7 + \
 210                                  1 + encode_stateid_maxsz + 1 + \
 211                                  encode_lockowner_maxsz)
 212 #define decode_lock_denied_maxsz \
 213                                 (8 + decode_lockowner_maxsz)
 214 #define decode_lock_maxsz       (op_decode_hdr_maxsz + \
 215                                  decode_lock_denied_maxsz)
 216 #define encode_lockt_maxsz      (op_encode_hdr_maxsz + 5 + \
 217                                 encode_lockowner_maxsz)
 218 #define decode_lockt_maxsz      (op_decode_hdr_maxsz + \
 219                                  decode_lock_denied_maxsz)
 220 #define encode_locku_maxsz      (op_encode_hdr_maxsz + 3 + \
 221                                  encode_stateid_maxsz + \
 222                                  4)
 223 #define decode_locku_maxsz      (op_decode_hdr_maxsz + \
 224                                  decode_stateid_maxsz)
 225 #define encode_release_lockowner_maxsz \
 226                                 (op_encode_hdr_maxsz + \
 227                                  encode_lockowner_maxsz)
 228 #define decode_release_lockowner_maxsz \
 229                                 (op_decode_hdr_maxsz)
 230 #define encode_access_maxsz     (op_encode_hdr_maxsz + 1)
 231 #define decode_access_maxsz     (op_decode_hdr_maxsz + 2)
 232 #define encode_symlink_maxsz    (op_encode_hdr_maxsz + \
 233                                 1 + nfs4_name_maxsz + \
 234                                 1 + \
 235                                 nfs4_fattr_maxsz)
 236 #define decode_symlink_maxsz    (op_decode_hdr_maxsz + 8)
 237 #define encode_create_maxsz     (op_encode_hdr_maxsz + \
 238                                 1 + 2 + nfs4_name_maxsz + \
 239                                 encode_attrs_maxsz)
 240 #define decode_create_maxsz     (op_decode_hdr_maxsz + \
 241                                 decode_change_info_maxsz + \
 242                                 nfs4_fattr_bitmap_maxsz)
 243 #define encode_statfs_maxsz     (encode_getattr_maxsz)
 244 #define decode_statfs_maxsz     (decode_getattr_maxsz)
 245 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 246 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 247 #define encode_getacl_maxsz     (encode_getattr_maxsz)
 248 #define decode_getacl_maxsz     (op_decode_hdr_maxsz + \
 249                                  nfs4_fattr_bitmap_maxsz + 1)
 250 #define encode_setacl_maxsz     (op_encode_hdr_maxsz + \
 251                                  encode_stateid_maxsz + 3)
 252 #define decode_setacl_maxsz     (decode_setattr_maxsz)
 253 #define encode_fs_locations_maxsz \
 254                                 (encode_getattr_maxsz)
 255 #define decode_fs_locations_maxsz \
 256                                 (0)
 257 #define encode_secinfo_maxsz    (op_encode_hdr_maxsz + nfs4_name_maxsz)
 258 #define decode_secinfo_maxsz    (op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))
 259
 260 #if defined(CONFIG_NFS_V4_1)
 261 #define NFS4_MAX_MACHINE_NAME_LEN (64)
 262
 263 #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \
 264                                 encode_verifier_maxsz + \
 265                                 1 /* co_ownerid.len */ + \
 266                                 XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \
 267                                 1 /* flags */ + \
 268                                 1 /* spa_how */ + \
 269                                 0 /* SP4_NONE (for now) */ + \
 270                                 1 /* zero implemetation id array */)
 271 #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \
 272                                 2 /* eir_clientid */ + \
 273                                 1 /* eir_sequenceid */ + \
 274                                 1 /* eir_flags */ + \
 275                                 1 /* spr_how */ + \
 276                                 0 /* SP4_NONE (for now) */ + \
 277                                 2 /* eir_server_owner.so_minor_id */ + \
 278                                 /* eir_server_owner.so_major_id<> */ \
 279                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 280                                 /* eir_server_scope<> */ \
 281                                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
 282                                 1 /* eir_server_impl_id array length */ + \
 283                                 0 /* ignored eir_server_impl_id contents */)
 284 #define encode_channel_attrs_maxsz  (6 + 1 /* ca_rdma_ird.len (0) */)
 285 #define decode_channel_attrs_maxsz  (6 + \
 286                                      1 /* ca_rdma_ird.len */ + \
 287                                      1 /* ca_rdma_ird */)
 288 #define encode_create_session_maxsz  (op_encode_hdr_maxsz + \
 289                                      2 /* csa_clientid */ + \
 290                                      1 /* csa_sequence */ + \
 291                                      1 /* csa_flags */ + \
 292                                      encode_channel_attrs_maxsz + \
 293                                      encode_channel_attrs_maxsz + \
 294                                      1 /* csa_cb_program */ + \
 295                                      1 /* csa_sec_parms.len (1) */ + \
 296                                      1 /* cb_secflavor (AUTH_SYS) */ + \
 297                                      1 /* stamp */ + \
 298                                      1 /* machinename.len */ + \
 299                                      XDR_QUADLEN(NFS4_MAX_MACHINE_NAME_LEN) + \
 300                                      1 /* uid */ + \
 301                                      1 /* gid */ + \
 302                                      1 /* gids.len (0) */)
 303 #define decode_create_session_maxsz  (op_decode_hdr_maxsz +     \
 304                                      XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
 305                                      1 /* csr_sequence */ + \
 306                                      1 /* csr_flags */ + \
 307                                      decode_channel_attrs_maxsz + \
 308                                      decode_channel_attrs_maxsz)
 309 #define encode_destroy_session_maxsz    (op_encode_hdr_maxsz + 4)
 310 #define decode_destroy_session_maxsz    (op_decode_hdr_maxsz)
 311 #define encode_sequence_maxsz   (op_encode_hdr_maxsz + \
 312                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4)
 313 #define decode_sequence_maxsz   (op_decode_hdr_maxsz + \
 314                                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5)
 315 #define encode_reclaim_complete_maxsz   (op_encode_hdr_maxsz + 4)
 316 #define decode_reclaim_complete_maxsz   (op_decode_hdr_maxsz + 4)
 317 #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \
 318                                 XDR_QUADLEN(NFS4_DEVICEID4_SIZE))
 319 #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \
 320                                 1 /* layout type */ + \
 321                                 1 /* opaque devaddr4 length */ + \
 322                                   /* devaddr4 payload is read into page */ \
 323                                 1 /* notification bitmap length */ + \
 324                                 1 /* notification bitmap */)
 325 #define encode_layoutget_maxsz  (op_encode_hdr_maxsz + 10 + \
 326                                 encode_stateid_maxsz)
 327 #define decode_layoutget_maxsz  (op_decode_hdr_maxsz + 8 + \
 328                                 decode_stateid_maxsz + \
 329                                 XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
 330 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 331                                 2 /* offset */ + \
 332                                 2 /* length */ + \
 333                                 1 /* reclaim */ + \
 334                                 encode_stateid_maxsz + \
 335                                 1 /* new offset (true) */ + \
 336                                 2 /* last byte written */ + \
 337                                 1 /* nt_timechanged (false) */ + \
 338                                 1 /* layoutupdate4 layout type */ + \
 339                                 1 /* NULL filelayout layoutupdate4 payload */)
 340 #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
 341
 342 #else /* CONFIG_NFS_V4_1 */
 343 #define encode_sequence_maxsz   0
 344 #define decode_sequence_maxsz   0
 345 #endif /* CONFIG_NFS_V4_1 */
 346
 347 #define NFS4_enc_compound_sz    (1024)  /* XXX: large enough? */
 348 #define NFS4_dec_compound_sz    (1024)  /* XXX: large enough? */
 349 #define NFS4_enc_read_sz        (compound_encode_hdr_maxsz + \
 350                                 encode_sequence_maxsz + \
 351                                 encode_putfh_maxsz + \
 352                                 encode_read_maxsz)
 353 #define NFS4_dec_read_sz        (compound_decode_hdr_maxsz + \
 354                                 decode_sequence_maxsz + \
 355                                 decode_putfh_maxsz + \
 356                                 decode_read_maxsz)
 357 #define NFS4_enc_readlink_sz    (compound_encode_hdr_maxsz + \
 358                                 encode_sequence_maxsz + \
 359                                 encode_putfh_maxsz + \
 360                                 encode_readlink_maxsz)
 361 #define NFS4_dec_readlink_sz    (compound_decode_hdr_maxsz + \
 362                                 decode_sequence_maxsz + \
 363                                 decode_putfh_maxsz + \
 364                                 decode_readlink_maxsz)
 365 #define NFS4_enc_readdir_sz     (compound_encode_hdr_maxsz + \
 366                                 encode_sequence_maxsz + \
 367                                 encode_putfh_maxsz + \
 368                                 encode_readdir_maxsz)
 369 #define NFS4_dec_readdir_sz     (compound_decode_hdr_maxsz + \
 370                                 decode_sequence_maxsz + \
 371                                 decode_putfh_maxsz + \
 372                                 decode_readdir_maxsz)
 373 #define NFS4_enc_write_sz       (compound_encode_hdr_maxsz + \
 374                                 encode_sequence_maxsz + \
 375                                 encode_putfh_maxsz + \
 376                                 encode_write_maxsz + \
 377                                 encode_getattr_maxsz)
 378 #define NFS4_dec_write_sz       (compound_decode_hdr_maxsz + \
 379                                 decode_sequence_maxsz + \
 380                                 decode_putfh_maxsz + \
 381                                 decode_write_maxsz + \
 382                                 decode_getattr_maxsz)
 383 #define NFS4_enc_commit_sz      (compound_encode_hdr_maxsz + \
 384                                 encode_sequence_maxsz + \
 385                                 encode_putfh_maxsz + \
 386                                 encode_commit_maxsz + \
 387                                 encode_getattr_maxsz)
 388 #define NFS4_dec_commit_sz      (compound_decode_hdr_maxsz + \
 389                                 decode_sequence_maxsz + \
 390                                 decode_putfh_maxsz + \
 391                                 decode_commit_maxsz + \
 392                                 decode_getattr_maxsz)
 393 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
 394                                 encode_sequence_maxsz + \
 395                                 encode_putfh_maxsz + \
 396                                 encode_savefh_maxsz + \
 397                                 encode_open_maxsz + \
 398                                 encode_getfh_maxsz + \
 399                                 encode_getattr_maxsz + \
 400                                 encode_restorefh_maxsz + \
 401                                 encode_getattr_maxsz)
 402 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
 403                                 decode_sequence_maxsz + \
 404                                 decode_putfh_maxsz + \
 405                                 decode_savefh_maxsz + \
 406                                 decode_open_maxsz + \
 407                                 decode_getfh_maxsz + \
 408                                 decode_getattr_maxsz + \
 409                                 decode_restorefh_maxsz + \
 410                                 decode_getattr_maxsz)
 411 #define NFS4_enc_open_confirm_sz \
 412                                 (compound_encode_hdr_maxsz + \
 413                                  encode_putfh_maxsz + \
 414                                  encode_open_confirm_maxsz)
 415 #define NFS4_dec_open_confirm_sz \
 416                                 (compound_decode_hdr_maxsz + \
 417                                  decode_putfh_maxsz + \
 418                                  decode_open_confirm_maxsz)
 419 #define NFS4_enc_open_noattr_sz (compound_encode_hdr_maxsz + \
 420                                         encode_sequence_maxsz + \
 421                                         encode_putfh_maxsz + \
 422                                         encode_open_maxsz + \
 423                                         encode_getattr_maxsz)
 424 #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \
 425                                         decode_sequence_maxsz + \
 426                                         decode_putfh_maxsz + \
 427                                         decode_open_maxsz + \
 428                                         decode_getattr_maxsz)
 429 #define NFS4_enc_open_downgrade_sz \
 430                                 (compound_encode_hdr_maxsz + \
 431                                  encode_sequence_maxsz + \
 432                                  encode_putfh_maxsz + \
 433                                  encode_open_downgrade_maxsz + \
 434                                  encode_getattr_maxsz)
 435 #define NFS4_dec_open_downgrade_sz \
 436                                 (compound_decode_hdr_maxsz + \
 437                                  decode_sequence_maxsz + \
 438                                  decode_putfh_maxsz + \
 439                                  decode_open_downgrade_maxsz + \
 440                                  decode_getattr_maxsz)
 441 #define NFS4_enc_close_sz       (compound_encode_hdr_maxsz + \
 442                                  encode_sequence_maxsz + \
 443                                  encode_putfh_maxsz + \
 444                                  encode_close_maxsz + \
 445                                  encode_getattr_maxsz)
 446 #define NFS4_dec_close_sz       (compound_decode_hdr_maxsz + \
 447                                  decode_sequence_maxsz + \
 448                                  decode_putfh_maxsz + \
 449                                  decode_close_maxsz + \
 450                                  decode_getattr_maxsz)
 451 #define NFS4_enc_setattr_sz     (compound_encode_hdr_maxsz + \
 452                                  encode_sequence_maxsz + \
 453                                  encode_putfh_maxsz + \
 454                                  encode_setattr_maxsz + \
 455                                  encode_getattr_maxsz)
 456 #define NFS4_dec_setattr_sz     (compound_decode_hdr_maxsz + \
 457                                  decode_sequence_maxsz + \
 458                                  decode_putfh_maxsz + \
 459                                  decode_setattr_maxsz + \
 460                                  decode_getattr_maxsz)
 461 #define NFS4_enc_fsinfo_sz      (compound_encode_hdr_maxsz + \
 462                                 encode_sequence_maxsz + \
 463                                 encode_putfh_maxsz + \
 464                                 encode_fsinfo_maxsz)
 465 #define NFS4_dec_fsinfo_sz      (compound_decode_hdr_maxsz + \
 466                                 decode_sequence_maxsz + \
 467                                 decode_putfh_maxsz + \
 468                                 decode_fsinfo_maxsz)
 469 #define NFS4_enc_renew_sz       (compound_encode_hdr_maxsz + \
 470                                 encode_renew_maxsz)
 471 #define NFS4_dec_renew_sz       (compound_decode_hdr_maxsz + \
 472                                 decode_renew_maxsz)
 473 #define NFS4_enc_setclientid_sz (compound_encode_hdr_maxsz + \
 474                                 encode_setclientid_maxsz)
 475 #define NFS4_dec_setclientid_sz (compound_decode_hdr_maxsz + \
 476                                 decode_setclientid_maxsz)
 477 #define NFS4_enc_setclientid_confirm_sz \
 478                                 (compound_encode_hdr_maxsz + \
 479                                 encode_setclientid_confirm_maxsz + \
 480                                 encode_putrootfh_maxsz + \
 481                                 encode_fsinfo_maxsz)
 482 #define NFS4_dec_setclientid_confirm_sz \
 483                                 (compound_decode_hdr_maxsz + \
 484                                 decode_setclientid_confirm_maxsz + \
 485                                 decode_putrootfh_maxsz + \
 486                                 decode_fsinfo_maxsz)
 487 #define NFS4_enc_lock_sz        (compound_encode_hdr_maxsz + \
 488                                 encode_sequence_maxsz + \
 489                                 encode_putfh_maxsz + \
 490                                 encode_lock_maxsz)
 491 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 492                                 decode_sequence_maxsz + \
 493                                 decode_putfh_maxsz + \
 494                                 decode_lock_maxsz)
 495 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 496                                 encode_sequence_maxsz + \
 497                                 encode_putfh_maxsz + \
 498                                 encode_lockt_maxsz)
 499 #define NFS4_dec_lockt_sz       (compound_decode_hdr_maxsz + \
 500                                  decode_sequence_maxsz + \
 501                                  decode_putfh_maxsz + \
 502                                  decode_lockt_maxsz)
 503 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 504                                 encode_sequence_maxsz + \
 505                                 encode_putfh_maxsz + \
 506                                 encode_locku_maxsz)
 507 #define NFS4_dec_locku_sz       (compound_decode_hdr_maxsz + \
 508                                 decode_sequence_maxsz + \
 509                                 decode_putfh_maxsz + \
 510                                 decode_locku_maxsz)
 511 #define NFS4_enc_release_lockowner_sz \
 512                                 (compound_encode_hdr_maxsz + \
 513                                  encode_lockowner_maxsz)
 514 #define NFS4_dec_release_lockowner_sz \
 515                                 (compound_decode_hdr_maxsz + \
 516                                  decode_lockowner_maxsz)
 517 #define NFS4_enc_access_sz      (compound_encode_hdr_maxsz + \
 518                                 encode_sequence_maxsz + \
 519                                 encode_putfh_maxsz + \
 520                                 encode_access_maxsz + \
 521                                 encode_getattr_maxsz)
 522 #define NFS4_dec_access_sz      (compound_decode_hdr_maxsz + \
 523                                 decode_sequence_maxsz + \
 524                                 decode_putfh_maxsz + \
 525                                 decode_access_maxsz + \
 526                                 decode_getattr_maxsz)
 527 #define NFS4_enc_getattr_sz     (compound_encode_hdr_maxsz + \
 528                                 encode_sequence_maxsz + \
 529                                 encode_putfh_maxsz + \
 530                                 encode_getattr_maxsz)
 531 #define NFS4_dec_getattr_sz     (compound_decode_hdr_maxsz + \
 532                                 decode_sequence_maxsz + \
 533                                 decode_putfh_maxsz + \
 534                                 decode_getattr_maxsz)
 535 #define NFS4_enc_lookup_sz      (compound_encode_hdr_maxsz + \
 536                                 encode_sequence_maxsz + \
 537                                 encode_putfh_maxsz + \
 538                                 encode_lookup_maxsz + \
 539                                 encode_getattr_maxsz + \
 540                                 encode_getfh_maxsz)
 541 #define NFS4_dec_lookup_sz      (compound_decode_hdr_maxsz + \
 542                                 decode_sequence_maxsz + \
 543                                 decode_putfh_maxsz + \
 544                                 decode_lookup_maxsz + \
 545                                 decode_getattr_maxsz + \
 546                                 decode_getfh_maxsz)
 547 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
 548                                 encode_sequence_maxsz + \
 549                                 encode_putrootfh_maxsz + \
 550                                 encode_getattr_maxsz + \
 551                                 encode_getfh_maxsz)
 552 #define NFS4_dec_lookup_root_sz (compound_decode_hdr_maxsz + \
 553                                 decode_sequence_maxsz + \
 554                                 decode_putrootfh_maxsz + \
 555                                 decode_getattr_maxsz + \
 556                                 decode_getfh_maxsz)
 557 #define NFS4_enc_remove_sz      (compound_encode_hdr_maxsz + \
 558                                 encode_sequence_maxsz + \
 559                                 encode_putfh_maxsz + \
 560                                 encode_remove_maxsz + \
 561                                 encode_getattr_maxsz)
 562 #define NFS4_dec_remove_sz      (compound_decode_hdr_maxsz + \
 563                                 decode_sequence_maxsz + \
 564                                 decode_putfh_maxsz + \
 565                                 decode_remove_maxsz + \
 566                                 decode_getattr_maxsz)
 567 #define NFS4_enc_rename_sz      (compound_encode_hdr_maxsz + \
 568                                 encode_sequence_maxsz + \
 569                                 encode_putfh_maxsz + \
 570                                 encode_savefh_maxsz + \
 571                                 encode_putfh_maxsz + \
 572                                 encode_rename_maxsz + \
 573                                 encode_getattr_maxsz + \
 574                                 encode_restorefh_maxsz + \
 575                                 encode_getattr_maxsz)
 576 #define NFS4_dec_rename_sz      (compound_decode_hdr_maxsz + \
 577                                 decode_sequence_maxsz + \
 578                                 decode_putfh_maxsz + \
 579                                 decode_savefh_maxsz + \
 580                                 decode_putfh_maxsz + \
 581                                 decode_rename_maxsz + \
 582                                 decode_getattr_maxsz + \
 583                                 decode_restorefh_maxsz + \
 584                                 decode_getattr_maxsz)
 585 #define NFS4_enc_link_sz        (compound_encode_hdr_maxsz + \
 586                                 encode_sequence_maxsz + \
 587                                 encode_putfh_maxsz + \
 588                                 encode_savefh_maxsz + \
 589                                 encode_putfh_maxsz + \
 590                                 encode_link_maxsz + \
 591                                 decode_getattr_maxsz + \
 592                                 encode_restorefh_maxsz + \
 593                                 decode_getattr_maxsz)
 594 #define NFS4_dec_link_sz        (compound_decode_hdr_maxsz + \
 595                                 decode_sequence_maxsz + \
 596                                 decode_putfh_maxsz + \
 597                                 decode_savefh_maxsz + \
 598                                 decode_putfh_maxsz + \
 599                                 decode_link_maxsz + \
 600                                 decode_getattr_maxsz + \
 601                                 decode_restorefh_maxsz + \
 602                                 decode_getattr_maxsz)
 603 #define NFS4_enc_symlink_sz     (compound_encode_hdr_maxsz + \
 604                                 encode_sequence_maxsz + \
 605                                 encode_putfh_maxsz + \
 606                                 encode_symlink_maxsz + \
 607                                 encode_getattr_maxsz + \
 608                                 encode_getfh_maxsz)
 609 #define NFS4_dec_symlink_sz     (compound_decode_hdr_maxsz + \
 610                                 decode_sequence_maxsz + \
 611                                 decode_putfh_maxsz + \
 612                                 decode_symlink_maxsz + \
 613                                 decode_getattr_maxsz + \
 614                                 decode_getfh_maxsz)
 615 #define NFS4_enc_create_sz      (compound_encode_hdr_maxsz + \
 616                                 encode_sequence_maxsz + \
 617                                 encode_putfh_maxsz + \
 618                                 encode_savefh_maxsz + \
 619                                 encode_create_maxsz + \
 620                                 encode_getfh_maxsz + \
 621                                 encode_getattr_maxsz + \
 622                                 encode_restorefh_maxsz + \
 623                                 encode_getattr_maxsz)
 624 #define NFS4_dec_create_sz      (compound_decode_hdr_maxsz + \
 625                                 decode_sequence_maxsz + \
 626                                 decode_putfh_maxsz + \
 627                                 decode_savefh_maxsz + \
 628                                 decode_create_maxsz + \
 629                                 decode_getfh_maxsz + \
 630                                 decode_getattr_maxsz + \
 631                                 decode_restorefh_maxsz + \
 632                                 decode_getattr_maxsz)
 633 #define NFS4_enc_pathconf_sz    (compound_encode_hdr_maxsz + \
 634                                 encode_sequence_maxsz + \
 635                                 encode_putfh_maxsz + \
 636                                 encode_getattr_maxsz)
 637 #define NFS4_dec_pathconf_sz    (compound_decode_hdr_maxsz + \
 638                                 decode_sequence_maxsz + \
 639                                 decode_putfh_maxsz + \
 640                                 decode_getattr_maxsz)
 641 #define NFS4_enc_statfs_sz      (compound_encode_hdr_maxsz + \
 642                                 encode_sequence_maxsz + \
 643                                 encode_putfh_maxsz + \
 644                                 encode_statfs_maxsz)
 645 #define NFS4_dec_statfs_sz      (compound_decode_hdr_maxsz + \
 646                                 decode_sequence_maxsz + \
 647                                 decode_putfh_maxsz + \
 648                                 decode_statfs_maxsz)
 649 #define NFS4_enc_server_caps_sz (compound_encode_hdr_maxsz + \
 650                                 encode_sequence_maxsz + \
 651                                 encode_putfh_maxsz + \
 652                                 encode_getattr_maxsz)
 653 #define NFS4_dec_server_caps_sz (compound_decode_hdr_maxsz + \
 654                                 decode_sequence_maxsz + \
 655                                 decode_putfh_maxsz + \
 656                                 decode_getattr_maxsz)
 657 #define NFS4_enc_delegreturn_sz (compound_encode_hdr_maxsz + \
 658                                 encode_sequence_maxsz + \
 659                                 encode_putfh_maxsz + \
 660                                 encode_delegreturn_maxsz + \
 661                                 encode_getattr_maxsz)
 662 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
 663                                 decode_sequence_maxsz + \
 664                                 decode_delegreturn_maxsz + \
 665                                 decode_getattr_maxsz)
 666 #define NFS4_enc_getacl_sz      (compound_encode_hdr_maxsz + \
 667                                 encode_sequence_maxsz + \
 668                                 encode_putfh_maxsz + \
 669                                 encode_getacl_maxsz)
 670 #define NFS4_dec_getacl_sz      (compound_decode_hdr_maxsz + \
 671                                 decode_sequence_maxsz + \
 672                                 decode_putfh_maxsz + \
 673                                 decode_getacl_maxsz)
 674 #define NFS4_enc_setacl_sz      (compound_encode_hdr_maxsz + \
 675                                 encode_sequence_maxsz + \
 676                                 encode_putfh_maxsz + \
 677                                 encode_setacl_maxsz)
 678 #define NFS4_dec_setacl_sz      (compound_decode_hdr_maxsz + \
 679                                 decode_sequence_maxsz + \
 680                                 decode_putfh_maxsz + \
 681                                 decode_setacl_maxsz)
 682 #define NFS4_enc_fs_locations_sz \
 683                                 (compound_encode_hdr_maxsz + \
 684                                  encode_sequence_maxsz + \
 685                                  encode_putfh_maxsz + \
 686                                  encode_lookup_maxsz + \
 687                                  encode_fs_locations_maxsz)
 688 #define NFS4_dec_fs_locations_sz \
 689                                 (compound_decode_hdr_maxsz + \
 690                                  decode_sequence_maxsz + \
 691                                  decode_putfh_maxsz + \
 692                                  decode_lookup_maxsz + \
 693                                  decode_fs_locations_maxsz)
 694 #define NFS4_enc_secinfo_sz     (compound_encode_hdr_maxsz + \
 695                                 encode_sequence_maxsz + \
 696                                 encode_putfh_maxsz + \
 697                                 encode_secinfo_maxsz)
 698 #define NFS4_dec_secinfo_sz     (compound_decode_hdr_maxsz + \
 699                                 decode_sequence_maxsz + \
 700                                 decode_putfh_maxsz + \
 701                                 decode_secinfo_maxsz)
 702 #if defined(CONFIG_NFS_V4_1)
 703 #define NFS4_enc_exchange_id_sz \
 704                                 (compound_encode_hdr_maxsz + \
 705                                  encode_exchange_id_maxsz)
 706 #define NFS4_dec_exchange_id_sz \
 707                                 (compound_decode_hdr_maxsz + \
 708                                  decode_exchange_id_maxsz)
 709 #define NFS4_enc_create_session_sz \
 710                                 (compound_encode_hdr_maxsz + \
 711                                  encode_create_session_maxsz)
 712 #define NFS4_dec_create_session_sz \
 713                                 (compound_decode_hdr_maxsz + \
 714                                  decode_create_session_maxsz)
 715 #define NFS4_enc_destroy_session_sz     (compound_encode_hdr_maxsz + \
 716                                          encode_destroy_session_maxsz)
 717 #define NFS4_dec_destroy_session_sz     (compound_decode_hdr_maxsz + \
 718                                          decode_destroy_session_maxsz)
 719 #define NFS4_enc_sequence_sz \
 720                                 (compound_decode_hdr_maxsz + \
 721                                  encode_sequence_maxsz)
 722 #define NFS4_dec_sequence_sz \
 723                                 (compound_decode_hdr_maxsz + \
 724                                  decode_sequence_maxsz)
 725 #define NFS4_enc_get_lease_time_sz      (compound_encode_hdr_maxsz + \
 726                                          encode_sequence_maxsz + \
 727                                          encode_putrootfh_maxsz + \
 728                                          encode_fsinfo_maxsz)
 729 #define NFS4_dec_get_lease_time_sz      (compound_decode_hdr_maxsz + \
 730                                          decode_sequence_maxsz + \
 731                                          decode_putrootfh_maxsz + \
 732                                          decode_fsinfo_maxsz)
 733 #define NFS4_enc_reclaim_complete_sz    (compound_encode_hdr_maxsz + \
 734                                          encode_sequence_maxsz + \
 735                                          encode_reclaim_complete_maxsz)
 736 #define NFS4_dec_reclaim_complete_sz    (compound_decode_hdr_maxsz + \
 737                                          decode_sequence_maxsz + \
 738                                          decode_reclaim_complete_maxsz)
 739 #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz +    \
 740                                 encode_sequence_maxsz +\
 741                                 encode_getdeviceinfo_maxsz)
 742 #define NFS4_dec_getdeviceinfo_sz (compound_decode_hdr_maxsz +    \
 743                                 decode_sequence_maxsz + \
 744                                 decode_getdeviceinfo_maxsz)
 745 #define NFS4_enc_layoutget_sz   (compound_encode_hdr_maxsz + \
 746                                 encode_sequence_maxsz + \
 747                                 encode_putfh_maxsz +        \
 748                                 encode_layoutget_maxsz)
 749 #define NFS4_dec_layoutget_sz   (compound_decode_hdr_maxsz + \
 750                                 decode_sequence_maxsz + \
 751                                 decode_putfh_maxsz +        \
 752                                 decode_layoutget_maxsz)
 753 #define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
 754                                 encode_sequence_maxsz +\
 755                                 encode_putfh_maxsz + \
 756                                 encode_layoutcommit_maxsz + \
 757                                 encode_getattr_maxsz)
 758 #define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
 759                                 decode_sequence_maxsz + \
 760                                 decode_putfh_maxsz + \
 761                                 decode_layoutcommit_maxsz + \
 762                                 decode_getattr_maxsz)
 763
 764
 765 const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 766                                       compound_encode_hdr_maxsz +
 767                                       encode_sequence_maxsz +
 768                                       encode_putfh_maxsz +
 769                                       encode_getattr_maxsz) *
 770                                      XDR_UNIT);
 771
 772 const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
 773                                      compound_decode_hdr_maxsz +
 774                                      decode_sequence_maxsz +
 775                                      decode_putfh_maxsz) *
 776                                     XDR_UNIT);
 777 #endif /* CONFIG_NFS_V4_1 */
 778
 779 static const umode_t nfs_type2fmt[] = {
 780         [NF4BAD] = 0,
 781         [NF4REG] = S_IFREG,
 782         [NF4DIR] = S_IFDIR,
 783         [NF4BLK] = S_IFBLK,
 784         [NF4CHR] = S_IFCHR,
 785         [NF4LNK] = S_IFLNK,
 786         [NF4SOCK] = S_IFSOCK,
 787         [NF4FIFO] = S_IFIFO,
 788         [NF4ATTRDIR] = 0,
 789         [NF4NAMEDATTR] = 0,
 790 };
 791
 792 struct compound_hdr {
 793         int32_t         status;
 794         uint32_t        nops;
 795         __be32 *        nops_p;
 796         uint32_t        taglen;
 797         char *          tag;
 798         uint32_t        replen;         /* expected reply words */
 799         u32             minorversion;
 800 };
 801
 802 static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes)
 803 {
 804         __be32 *p = xdr_reserve_space(xdr, nbytes);
 805         BUG_ON(!p);
 806         return p;
 807 }
 808
 809 static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
 810 {
 811         __be32 *p;
 812
 813         p = xdr_reserve_space(xdr, 4 + len);
 814         BUG_ON(p == NULL);
 815         xdr_encode_opaque(p, str, len);
 816 }
 817
 818 static void encode_compound_hdr(struct xdr_stream *xdr,
 819                                 struct rpc_rqst *req,
 820                                 struct compound_hdr *hdr)
 821 {
 822         __be32 *p;
 823         struct rpc_auth *auth = req->rq_cred->cr_auth;
 824
 825         /* initialize running count of expected bytes in reply.
 826          * NOTE: the replied tag SHOULD be the same is the one sent,
 827          * but this is not required as a MUST for the server to do so. */
 828         hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
 829
 830         dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag);
 831         BUG_ON(hdr->taglen > NFS4_MAXTAGLEN);
 832         p = reserve_space(xdr, 4 + hdr->taglen + 8);
 833         p = xdr_encode_opaque(p, hdr->tag, hdr->taglen);
 834         *p++ = cpu_to_be32(hdr->minorversion);
 835         hdr->nops_p = p;
 836         *p = cpu_to_be32(hdr->nops);
 837 }
 838
 839 static void encode_nops(struct compound_hdr *hdr)
 840 {
 841         BUG_ON(hdr->nops > NFS4_MAX_OPS);
 842         *hdr->nops_p = htonl(hdr->nops);
 843 }
 844
 845 static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf)
 846 {
 847         __be32 *p;
 848
 849         p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
 850         BUG_ON(p == NULL);
 851         xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE);
 852 }
 853
 854 static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
 855 {
 856         char owner_name[IDMAP_NAMESZ];
 857         char owner_group[IDMAP_NAMESZ];
 858         int owner_namelen = 0;
 859         int owner_grouplen = 0;
 860         __be32 *p;
 861         __be32 *q;
 862         int len;
 863         uint32_t bmval0 = 0;
 864         uint32_t bmval1 = 0;
 865
 866         /*
 867          * We reserve enough space to write the entire attribute buffer at once.
 868          * In the worst-case, this would be
 869          *   12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime)
 870          *          = 36 bytes, plus any contribution from variable-length fields
 871          *            such as owner/group.
 872          */
 873         len = 16;
 874
 875         /* Sigh */
 876         if (iap->ia_valid & ATTR_SIZE)
 877                 len += 8;
 878         if (iap->ia_valid & ATTR_MODE)
 879                 len += 4;
 880         if (iap->ia_valid & ATTR_UID) {
 881                 owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ);
 882                 if (owner_namelen < 0) {
 883                         dprintk("nfs: couldn't resolve uid %d to string\n",
 884                                         iap->ia_uid);
 885                         /* XXX */
 886                         strcpy(owner_name, "nobody");
 887                         owner_namelen = sizeof("nobody") - 1;
 888                         /* goto out; */
 889                 }
 890                 len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
 891         }
 892         if (iap->ia_valid & ATTR_GID) {
 893                 owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ);
 894                 if (owner_grouplen < 0) {
 895                         dprintk("nfs: couldn't resolve gid %d to string\n",
 896                                         iap->ia_gid);
 897                         strcpy(owner_group, "nobody");
 898                         owner_grouplen = sizeof("nobody") - 1;
 899                         /* goto out; */
 900                 }
 901                 len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
 902         }
 903         if (iap->ia_valid & ATTR_ATIME_SET)
 904                 len += 16;
 905         else if (iap->ia_valid & ATTR_ATIME)
 906                 len += 4;
 907         if (iap->ia_valid & ATTR_MTIME_SET)
 908                 len += 16;
 909         else if (iap->ia_valid & ATTR_MTIME)
 910                 len += 4;
 911         p = reserve_space(xdr, len);
 912
 913         /*
 914          * We write the bitmap length now, but leave the bitmap and the attribute
 915          * buffer length to be backfilled at the end of this routine.
 916          */
 917         *p++ = cpu_to_be32(2);
 918         q = p;
 919         p += 3;
 920
 921         if (iap->ia_valid & ATTR_SIZE) {
 922                 bmval0 |= FATTR4_WORD0_SIZE;
 923                 p = xdr_encode_hyper(p, iap->ia_size);
 924         }
 925         if (iap->ia_valid & ATTR_MODE) {
 926                 bmval1 |= FATTR4_WORD1_MODE;
 927                 *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO);
 928         }
 929         if (iap->ia_valid & ATTR_UID) {
 930                 bmval1 |= FATTR4_WORD1_OWNER;
 931                 p = xdr_encode_opaque(p, owner_name, owner_namelen);
 932         }
 933         if (iap->ia_valid & ATTR_GID) {
 934                 bmval1 |= FATTR4_WORD1_OWNER_GROUP;
 935                 p = xdr_encode_opaque(p, owner_group, owner_grouplen);
 936         }
 937         if (iap->ia_valid & ATTR_ATIME_SET) {
 938                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 939                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 940                 *p++ = cpu_to_be32(0);
 941                 *p++ = cpu_to_be32(iap->ia_atime.tv_sec);
 942                 *p++ = cpu_to_be32(iap->ia_atime.tv_nsec);
 943         }
 944         else if (iap->ia_valid & ATTR_ATIME) {
 945                 bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET;
 946                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 947         }
 948         if (iap->ia_valid & ATTR_MTIME_SET) {
 949                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 950                 *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME);
 951                 *p++ = cpu_to_be32(0);
 952                 *p++ = cpu_to_be32(iap->ia_mtime.tv_sec);
 953                 *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec);
 954         }
 955         else if (iap->ia_valid & ATTR_MTIME) {
 956                 bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
 957                 *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
 958         }
 959
 960         /*
 961          * Now we backfill the bitmap and the attribute buffer length.
 962          */
 963         if (len != ((char *)p - (char *)q) + 4) {
 964                 printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n",
 965                                 len, ((char *)p - (char *)q) + 4);
 966                 BUG();
 967         }
 968         len = (char *)p - (char *)q - 12;
 969         *q++ = htonl(bmval0);
 970         *q++ = htonl(bmval1);
 971         *q = htonl(len);
 972
 973 /* out: */
 974 }
 975
 976 static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr)
 977 {
 978         __be32 *p;
 979
 980         p = reserve_space(xdr, 8);
 981         *p++ = cpu_to_be32(OP_ACCESS);
 982         *p = cpu_to_be32(access);
 983         hdr->nops++;
 984         hdr->replen += decode_access_maxsz;
 985 }
 986
 987 static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
 988 {
 989         __be32 *p;
 990
 991         p = reserve_space(xdr, 8+NFS4_STATEID_SIZE);
 992         *p++ = cpu_to_be32(OP_CLOSE);
 993         *p++ = cpu_to_be32(arg->seqid->sequence->counter);
 994         xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
 995         hdr->nops++;
 996         hdr->replen += decode_close_maxsz;
 997 }
 998
 999 static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1000 {
1001         __be32 *p;
1002
1003         p = reserve_space(xdr, 16);
1004         *p++ = cpu_to_be32(OP_COMMIT);
1005         p = xdr_encode_hyper(p, args->offset);
1006         *p = cpu_to_be32(args->count);
1007         hdr->nops++;
1008         hdr->replen += decode_commit_maxsz;
1009 }
1010
1011 static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr)
1012 {
1013         __be32 *p;
1014
1015         p = reserve_space(xdr, 8);
1016         *p++ = cpu_to_be32(OP_CREATE);
1017         *p = cpu_to_be32(create->ftype);
1018
1019         switch (create->ftype) {
1020         case NF4LNK:
1021                 p = reserve_space(xdr, 4);
1022                 *p = cpu_to_be32(create->u.symlink.len);
1023                 xdr_write_pages(xdr, create->u.symlink.pages, 0, create->u.symlink.len);
1024                 break;
1025
1026         case NF4BLK: case NF4CHR:
1027                 p = reserve_space(xdr, 8);
1028                 *p++ = cpu_to_be32(create->u.device.specdata1);
1029                 *p = cpu_to_be32(create->u.device.specdata2);
1030                 break;
1031
1032         default:
1033                 break;
1034         }
1035
1036         encode_string(xdr, create->name->len, create->name->name);
1037         hdr->nops++;
1038         hdr->replen += decode_create_maxsz;
1039
1040         encode_attrs(xdr, create->attrs, create->server);
1041 }
1042
1043 static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
1044 {
1045         __be32 *p;
1046
1047         p = reserve_space(xdr, 12);
1048         *p++ = cpu_to_be32(OP_GETATTR);
1049         *p++ = cpu_to_be32(1);
1050         *p = cpu_to_be32(bitmap);
1051         hdr->nops++;
1052         hdr->replen += decode_getattr_maxsz;
1053 }
1054
1055 static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr)
1056 {
1057         __be32 *p;
1058
1059         p = reserve_space(xdr, 16);
1060         *p++ = cpu_to_be32(OP_GETATTR);
1061         *p++ = cpu_to_be32(2);
1062         *p++ = cpu_to_be32(bm0);
1063         *p = cpu_to_be32(bm1);
1064         hdr->nops++;
1065         hdr->replen += decode_getattr_maxsz;
1066 }
1067
1068 static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1069 {
1070         encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0],
1071                            bitmask[1] & nfs4_fattr_bitmap[1], hdr);
1072 }
1073
1074 static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1075 {
1076         encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0],
1077                            bitmask[1] & nfs4_fsinfo_bitmap[1], hdr);
1078 }
1079
1080 static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr)
1081 {
1082         encode_getattr_two(xdr, bitmask[0] & nfs4_fs_locations_bitmap[0],
1083                            bitmask[1] & nfs4_fs_locations_bitmap[1], hdr);
1084 }
1085
1086 static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1087 {
1088         __be32 *p;
1089
1090         p = reserve_space(xdr, 4);
1091         *p = cpu_to_be32(OP_GETFH);
1092         hdr->nops++;
1093         hdr->replen += decode_getfh_maxsz;
1094 }
1095
1096 static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1097 {
1098         __be32 *p;
1099
1100         p = reserve_space(xdr, 8 + name->len);
1101         *p++ = cpu_to_be32(OP_LINK);
1102         xdr_encode_opaque(p, name->name, name->len);
1103         hdr->nops++;
1104         hdr->replen += decode_link_maxsz;
1105 }
1106
1107 static inline int nfs4_lock_type(struct file_lock *fl, int block)
1108 {
1109         if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
1110                 return block ? NFS4_READW_LT : NFS4_READ_LT;
1111         return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
1112 }
1113
1114 static inline uint64_t nfs4_lock_length(struct file_lock *fl)
1115 {
1116         if (fl->fl_end == OFFSET_MAX)
1117                 return ~(uint64_t)0;
1118         return fl->fl_end - fl->fl_start + 1;
1119 }
1120
1121 static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner)
1122 {
1123         __be32 *p;
1124
1125         p = reserve_space(xdr, 32);
1126         p = xdr_encode_hyper(p, lowner->clientid);
1127         *p++ = cpu_to_be32(20);
1128         p = xdr_encode_opaque_fixed(p, "lock id:", 8);
1129         *p++ = cpu_to_be32(lowner->s_dev);
1130         xdr_encode_hyper(p, lowner->id);
1131 }
1132
1133 /*
1134  * opcode,type,reclaim,offset,length,new_lock_owner = 32
1135  * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
1136  */
1137 static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
1138 {
1139         __be32 *p;
1140
1141         p = reserve_space(xdr, 32);
1142         *p++ = cpu_to_be32(OP_LOCK);
1143         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
1144         *p++ = cpu_to_be32(args->reclaim);
1145         p = xdr_encode_hyper(p, args->fl->fl_start);
1146         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1147         *p = cpu_to_be32(args->new_lock_owner);
1148         if (args->new_lock_owner){
1149                 p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1150                 *p++ = cpu_to_be32(args->open_seqid->sequence->counter);
1151                 p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
1152                 *p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
1153                 encode_lockowner(xdr, &args->lock_owner);
1154         }
1155         else {
1156                 p = reserve_space(xdr, NFS4_STATEID_SIZE+4);
1157                 p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
1158                 *p = cpu_to_be32(args->lock_seqid->sequence->counter);
1159         }
1160         hdr->nops++;
1161         hdr->replen += decode_lock_maxsz;
1162 }
1163
1164 static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
1165 {
1166         __be32 *p;
1167
1168         p = reserve_space(xdr, 24);
1169         *p++ = cpu_to_be32(OP_LOCKT);
1170         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1171         p = xdr_encode_hyper(p, args->fl->fl_start);
1172         p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1173         encode_lockowner(xdr, &args->lock_owner);
1174         hdr->nops++;
1175         hdr->replen += decode_lockt_maxsz;
1176 }
1177
1178 static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
1179 {
1180         __be32 *p;
1181
1182         p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16);
1183         *p++ = cpu_to_be32(OP_LOCKU);
1184         *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
1185         *p++ = cpu_to_be32(args->seqid->sequence->counter);
1186         p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
1187         p = xdr_encode_hyper(p, args->fl->fl_start);
1188         xdr_encode_hyper(p, nfs4_lock_length(args->fl));
1189         hdr->nops++;
1190         hdr->replen += decode_locku_maxsz;
1191 }
1192
1193 static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr)
1194 {
1195         __be32 *p;
1196
1197         p = reserve_space(xdr, 4);
1198         *p = cpu_to_be32(OP_RELEASE_LOCKOWNER);
1199         encode_lockowner(xdr, lowner);
1200         hdr->nops++;
1201         hdr->replen += decode_release_lockowner_maxsz;
1202 }
1203
1204 static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1205 {
1206         int len = name->len;
1207         __be32 *p;
1208
1209         p = reserve_space(xdr, 8 + len);
1210         *p++ = cpu_to_be32(OP_LOOKUP);
1211         xdr_encode_opaque(p, name->name, len);
1212         hdr->nops++;
1213         hdr->replen += decode_lookup_maxsz;
1214 }
1215
1216 static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
1217 {
1218         __be32 *p;
1219
1220         p = reserve_space(xdr, 8);
1221         switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1222         case FMODE_READ:
1223                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
1224                 break;
1225         case FMODE_WRITE:
1226                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
1227                 break;
1228         case FMODE_READ|FMODE_WRITE:
1229                 *p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
1230                 break;
1231         default:
1232                 *p++ = cpu_to_be32(0);
1233         }
1234         *p = cpu_to_be32(0);            /* for linux, share_deny = 0 always */
1235 }
1236
1237 static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1238 {
1239         __be32 *p;
1240  /*
1241  * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
1242  * owner 4 = 32
1243  */
1244         p = reserve_space(xdr, 8);
1245         *p++ = cpu_to_be32(OP_OPEN);
1246         *p = cpu_to_be32(arg->seqid->sequence->counter);
1247         encode_share_access(xdr, arg->fmode);
1248         p = reserve_space(xdr, 32);
1249         p = xdr_encode_hyper(p, arg->clientid);
1250         *p++ = cpu_to_be32(20);
1251         p = xdr_encode_opaque_fixed(p, "open id:", 8);
1252         *p++ = cpu_to_be32(arg->server->s_dev);
1253         xdr_encode_hyper(p, arg->id);
1254 }
1255
1256 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1257 {
1258         __be32 *p;
1259         struct nfs_client *clp;
1260
1261         p = reserve_space(xdr, 4);
1262         switch(arg->open_flags & O_EXCL) {
1263         case 0:
1264                 *p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
1265                 encode_attrs(xdr, arg->u.attrs, arg->server);
1266                 break;
1267         default:
1268                 clp = arg->server->nfs_client;
1269                 if (clp->cl_mvops->minor_version > 0) {
1270                         if (nfs4_has_persistent_session(clp)) {
1271                                 *p = cpu_to_be32(NFS4_CREATE_GUARDED);
1272                                 encode_attrs(xdr, arg->u.attrs, arg->server);
1273                         } else {
1274                                 struct iattr dummy;
1275
1276                                 *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
1277                                 encode_nfs4_verifier(xdr, &arg->u.verifier);
1278                                 dummy.ia_valid = 0;
1279                                 encode_attrs(xdr, &dummy, arg->server);
1280                         }
1281                 } else {
1282                         *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
1283                         encode_nfs4_verifier(xdr, &arg->u.verifier);
1284                 }
1285         }
1286 }
1287
1288 static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
1289 {
1290         __be32 *p;
1291
1292         p = reserve_space(xdr, 4);
1293         switch (arg->open_flags & O_CREAT) {
1294         case 0:
1295                 *p = cpu_to_be32(NFS4_OPEN_NOCREATE);
1296                 break;
1297         default:
1298                 BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
1299                 *p = cpu_to_be32(NFS4_OPEN_CREATE);
1300                 encode_createmode(xdr, arg);
1301         }
1302 }
1303
1304 static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
1305 {
1306         __be32 *p;
1307
1308         p = reserve_space(xdr, 4);
1309         switch (delegation_type) {
1310         case 0:
1311                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
1312                 break;
1313         case FMODE_READ:
1314                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
1315                 break;
1316         case FMODE_WRITE|FMODE_READ:
1317                 *p = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
1318                 break;
1319         default:
1320                 BUG();
1321         }
1322 }
1323
1324 static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
1325 {
1326         __be32 *p;
1327
1328         p = reserve_space(xdr, 4);
1329         *p = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
1330         encode_string(xdr, name->len, name->name);
1331 }
1332
1333 static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
1334 {
1335         __be32 *p;
1336
1337         p = reserve_space(xdr, 4);
1338         *p = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
1339         encode_delegation_type(xdr, type);
1340 }
1341
1342 static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
1343 {
1344         __be32 *p;
1345
1346         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1347         *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
1348         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1349         encode_string(xdr, name->len, name->name);
1350 }
1351
1352 static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
1353 {
1354         encode_openhdr(xdr, arg);
1355         encode_opentype(xdr, arg);
1356         switch (arg->claim) {
1357         case NFS4_OPEN_CLAIM_NULL:
1358                 encode_claim_null(xdr, arg->name);
1359                 break;
1360         case NFS4_OPEN_CLAIM_PREVIOUS:
1361                 encode_claim_previous(xdr, arg->u.delegation_type);
1362                 break;
1363         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1364                 encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
1365                 break;
1366         default:
1367                 BUG();
1368         }
1369         hdr->nops++;
1370         hdr->replen += decode_open_maxsz;
1371 }
1372
1373 static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
1374 {
1375         __be32 *p;
1376
1377         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1378         *p++ = cpu_to_be32(OP_OPEN_CONFIRM);
1379         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1380         *p = cpu_to_be32(arg->seqid->sequence->counter);
1381         hdr->nops++;
1382         hdr->replen += decode_open_confirm_maxsz;
1383 }
1384
1385 static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
1386 {
1387         __be32 *p;
1388
1389         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4);
1390         *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
1391         p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
1392         *p = cpu_to_be32(arg->seqid->sequence->counter);
1393         encode_share_access(xdr, arg->fmode);
1394         hdr->nops++;
1395         hdr->replen += decode_open_downgrade_maxsz;
1396 }
1397
1398 static void
1399 encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
1400 {
1401         int len = fh->size;
1402         __be32 *p;
1403
1404         p = reserve_space(xdr, 8 + len);
1405         *p++ = cpu_to_be32(OP_PUTFH);
1406         xdr_encode_opaque(p, fh->data, len);
1407         hdr->nops++;
1408         hdr->replen += decode_putfh_maxsz;
1409 }
1410
1411 static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1412 {
1413         __be32 *p;
1414
1415         p = reserve_space(xdr, 4);
1416         *p = cpu_to_be32(OP_PUTROOTFH);
1417         hdr->nops++;
1418         hdr->replen += decode_putrootfh_maxsz;
1419 }
1420
1421 static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx, int zero_seqid)
1422 {
1423         nfs4_stateid stateid;
1424         __be32 *p;
1425
1426         p = reserve_space(xdr, NFS4_STATEID_SIZE);
1427         if (ctx->state != NULL) {
1428                 nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid);
1429                 if (zero_seqid)
1430                         stateid.stateid.seqid = 0;
1431                 xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
1432         } else
1433                 xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1434 }
1435
1436 static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
1437 {
1438         __be32 *p;
1439
1440         p = reserve_space(xdr, 4);
1441         *p = cpu_to_be32(OP_READ);
1442
1443         encode_stateid(xdr, args->context, args->lock_context,
1444                        hdr->minorversion);
1445
1446         p = reserve_space(xdr, 12);
1447         p = xdr_encode_hyper(p, args->offset);
1448         *p = cpu_to_be32(args->count);
1449         hdr->nops++;
1450         hdr->replen += decode_read_maxsz;
1451 }
1452
1453 static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
1454 {
1455         uint32_t attrs[2] = {0, 0};
1456         uint32_t dircount = readdir->count >> 1;
1457         __be32 *p;
1458
1459         if (readdir->plus) {
1460                 attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
1461                         FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
1462                 attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
1463                         FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
1464                         FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
1465                         FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1466                 dircount >>= 1;
1467         }
1468         attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
1469         attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
1470         /* Switch to mounted_on_fileid if the server supports it */
1471         if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
1472                 attrs[0] &= ~FATTR4_WORD0_FILEID;
1473         else
1474                 attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
1475
1476         p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
1477         *p++ = cpu_to_be32(OP_READDIR);
1478         p = xdr_encode_hyper(p, readdir->cookie);
1479         p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
1480         *p++ = cpu_to_be32(dircount);
1481         *p++ = cpu_to_be32(readdir->count);
1482         *p++ = cpu_to_be32(2);
1483
1484         *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
1485         *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
1486         hdr->nops++;
1487         hdr->replen += decode_readdir_maxsz;
1488         dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
1489                         __func__,
1490                         (unsigned long long)readdir->cookie,
1491                         ((u32 *)readdir->verifier.data)[0],
1492                         ((u32 *)readdir->verifier.data)[1],
1493                         attrs[0] & readdir->bitmask[0],
1494                         attrs[1] & readdir->bitmask[1]);
1495 }
1496
1497 static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
1498 {
1499         __be32 *p;
1500
1501         p = reserve_space(xdr, 4);
1502         *p = cpu_to_be32(OP_READLINK);
1503         hdr->nops++;
1504         hdr->replen += decode_readlink_maxsz;
1505 }
1506
1507 static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1508 {
1509         __be32 *p;
1510
1511         p = reserve_space(xdr, 8 + name->len);
1512         *p++ = cpu_to_be32(OP_REMOVE);
1513         xdr_encode_opaque(p, name->name, name->len);
1514         hdr->nops++;
1515         hdr->replen += decode_remove_maxsz;
1516 }
1517
1518 static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
1519 {
1520         __be32 *p;
1521
1522         p = reserve_space(xdr, 4);
1523         *p = cpu_to_be32(OP_RENAME);
1524         encode_string(xdr, oldname->len, oldname->name);
1525         encode_string(xdr, newname->len, newname->name);
1526         hdr->nops++;
1527         hdr->replen += decode_rename_maxsz;
1528 }
1529
1530 static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
1531 {
1532         __be32 *p;
1533
1534         p = reserve_space(xdr, 12);
1535         *p++ = cpu_to_be32(OP_RENEW);
1536         xdr_encode_hyper(p, client_stateid->cl_clientid);
1537         hdr->nops++;
1538         hdr->replen += decode_renew_maxsz;
1539 }
1540
1541 static void
1542 encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1543 {
1544         __be32 *p;
1545
1546         p = reserve_space(xdr, 4);
1547         *p = cpu_to_be32(OP_RESTOREFH);
1548         hdr->nops++;
1549         hdr->replen += decode_restorefh_maxsz;
1550 }
1551
1552 static void
1553 encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
1554 {
1555         __be32 *p;
1556
1557         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1558         *p++ = cpu_to_be32(OP_SETATTR);
1559         xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
1560         p = reserve_space(xdr, 2*4);
1561         *p++ = cpu_to_be32(1);
1562         *p = cpu_to_be32(FATTR4_WORD0_ACL);
1563         BUG_ON(arg->acl_len % 4);
1564         p = reserve_space(xdr, 4);
1565         *p = cpu_to_be32(arg->acl_len);
1566         xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
1567         hdr->nops++;
1568         hdr->replen += decode_setacl_maxsz;
1569 }
1570
1571 static void
1572 encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
1573 {
1574         __be32 *p;
1575
1576         p = reserve_space(xdr, 4);
1577         *p = cpu_to_be32(OP_SAVEFH);
1578         hdr->nops++;
1579         hdr->replen += decode_savefh_maxsz;
1580 }
1581
1582 static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
1583 {
1584         __be32 *p;
1585
1586         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1587         *p++ = cpu_to_be32(OP_SETATTR);
1588         xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
1589         hdr->nops++;
1590         hdr->replen += decode_setattr_maxsz;
1591         encode_attrs(xdr, arg->iap, server);
1592 }
1593
1594 static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
1595 {
1596         __be32 *p;
1597
1598         p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE);
1599         *p++ = cpu_to_be32(OP_SETCLIENTID);
1600         xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);
1601
1602         encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
1603         p = reserve_space(xdr, 4);
1604         *p = cpu_to_be32(setclientid->sc_prog);
1605         encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
1606         encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
1607         p = reserve_space(xdr, 4);
1608         *p = cpu_to_be32(setclientid->sc_cb_ident);
1609         hdr->nops++;
1610         hdr->replen += decode_setclientid_maxsz;
1611 }
1612
1613 static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr)
1614 {
1615         __be32 *p;
1616
1617         p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE);
1618         *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
1619         p = xdr_encode_hyper(p, arg->clientid);
1620         xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE);
1621         hdr->nops++;
1622         hdr->replen += decode_setclientid_confirm_maxsz;
1623 }
1624
1625 static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
1626 {
1627         __be32 *p;
1628
1629         p = reserve_space(xdr, 4);
1630         *p = cpu_to_be32(OP_WRITE);
1631
1632         encode_stateid(xdr, args->context, args->lock_context,
1633                        hdr->minorversion);
1634
1635         p = reserve_space(xdr, 16);
1636         p = xdr_encode_hyper(p, args->offset);
1637         *p++ = cpu_to_be32(args->stable);
1638         *p = cpu_to_be32(args->count);
1639
1640         xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1641         hdr->nops++;
1642         hdr->replen += decode_write_maxsz;
1643 }
1644
1645 static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
1646 {
1647         __be32 *p;
1648
1649         p = reserve_space(xdr, 4+NFS4_STATEID_SIZE);
1650
1651         *p++ = cpu_to_be32(OP_DELEGRETURN);
1652         xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
1653         hdr->nops++;
1654         hdr->replen += decode_delegreturn_maxsz;
1655 }
1656
1657 static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
1658 {
1659         int len = name->len;
1660         __be32 *p;
1661
1662         p = reserve_space(xdr, 8 + len);
1663         *p++ = cpu_to_be32(OP_SECINFO);
1664         xdr_encode_opaque(p, name->name, len);
1665         hdr->nops++;
1666         hdr->replen += decode_secinfo_maxsz;
1667 }
1668
1669 #if defined(CONFIG_NFS_V4_1)
1670 /* NFSv4.1 operations */
1671 static void encode_exchange_id(struct xdr_stream *xdr,
1672                                struct nfs41_exchange_id_args *args,
1673                                struct compound_hdr *hdr)
1674 {
1675         __be32 *p;
1676
1677         p = reserve_space(xdr, 4 + sizeof(args->verifier->data));
1678         *p++ = cpu_to_be32(OP_EXCHANGE_ID);
1679         xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));
1680
1681         encode_string(xdr, args->id_len, args->id);
1682
1683         p = reserve_space(xdr, 12);
1684         *p++ = cpu_to_be32(args->flags);
1685         *p++ = cpu_to_be32(0);  /* zero length state_protect4_a */
1686         *p = cpu_to_be32(0);    /* zero length implementation id array */
1687         hdr->nops++;
1688         hdr->replen += decode_exchange_id_maxsz;
1689 }
1690
1691 static void encode_create_session(struct xdr_stream *xdr,
1692                                   struct nfs41_create_session_args *args,
1693                                   struct compound_hdr *hdr)
1694 {
1695         __be32 *p;
1696         char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
1697         uint32_t len;
1698         struct nfs_client *clp = args->client;
1699         u32 max_resp_sz_cached;
1700
1701         /*
1702          * Assumes OPEN is the biggest non-idempotent compound.
1703          * 2 is the verifier.
1704          */
1705         max_resp_sz_cached = (NFS4_dec_open_sz + RPC_REPHDRSIZE +
1706                               RPC_MAX_AUTH_SIZE + 2) * XDR_UNIT;
1707
1708         len = scnprintf(machine_name, sizeof(machine_name), "%s",
1709                         clp->cl_ipaddr);
1710
1711         p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12);
1712         *p++ = cpu_to_be32(OP_CREATE_SESSION);
1713         p = xdr_encode_hyper(p, clp->cl_clientid);
1714         *p++ = cpu_to_be32(clp->cl_seqid);                      /*Sequence id */
1715         *p++ = cpu_to_be32(args->flags);                        /*flags */
1716
1717         /* Fore Channel */
1718         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1719         *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */
1720         *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */
1721         *p++ = cpu_to_be32(max_resp_sz_cached);         /* Max resp sz cached */
1722         *p++ = cpu_to_be32(args->fc_attrs.max_ops);     /* max operations */
1723         *p++ = cpu_to_be32(args->fc_attrs.max_reqs);    /* max requests */
1724         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1725
1726         /* Back Channel */
1727         *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
1728         *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */
1729         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */
1730         *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);  /* Max resp sz cached */
1731         *p++ = cpu_to_be32(args->bc_attrs.max_ops);     /* max operations */
1732         *p++ = cpu_to_be32(args->bc_attrs.max_reqs);    /* max requests */
1733         *p++ = cpu_to_be32(0);                          /* rdmachannel_attrs */
1734
1735         *p++ = cpu_to_be32(args->cb_program);           /* cb_program */
1736         *p++ = cpu_to_be32(1);
1737         *p++ = cpu_to_be32(RPC_AUTH_UNIX);                      /* auth_sys */
1738
1739         /* authsys_parms rfc1831 */
1740         *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);     /* stamp */
1741         p = xdr_encode_opaque(p, machine_name, len);
1742         *p++ = cpu_to_be32(0);                          /* UID */
1743         *p++ = cpu_to_be32(0);                          /* GID */
1744         *p = cpu_to_be32(0);                            /* No more gids */
1745         hdr->nops++;
1746         hdr->replen += decode_create_session_maxsz;
1747 }
1748
1749 static void encode_destroy_session(struct xdr_stream *xdr,
1750                                    struct nfs4_session *session,
1751                                    struct compound_hdr *hdr)
1752 {
1753         __be32 *p;
1754         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN);
1755         *p++ = cpu_to_be32(OP_DESTROY_SESSION);
1756         xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1757         hdr->nops++;
1758         hdr->replen += decode_destroy_session_maxsz;
1759 }
1760
1761 static void encode_reclaim_complete(struct xdr_stream *xdr,
1762                                     struct nfs41_reclaim_complete_args *args,
1763                                     struct compound_hdr *hdr)
1764 {
1765         __be32 *p;
1766
1767         p = reserve_space(xdr, 8);
1768         *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE);
1769         *p++ = cpu_to_be32(args->one_fs);
1770         hdr->nops++;
1771         hdr->replen += decode_reclaim_complete_maxsz;
1772 }
1773 #endif /* CONFIG_NFS_V4_1 */
1774
1775 static void encode_sequence(struct xdr_stream *xdr,
1776                             const struct nfs4_sequence_args *args,
1777                             struct compound_hdr *hdr)
1778 {
1779 #if defined(CONFIG_NFS_V4_1)
1780         struct nfs4_session *session = args->sa_session;
1781         struct nfs4_slot_table *tp;
1782         struct nfs4_slot *slot;
1783         __be32 *p;
1784
1785         if (!session)
1786                 return;
1787
1788         tp = &session->fc_slot_table;
1789
1790         WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
1791         slot = tp->slots + args->sa_slotid;
1792
1793         p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16);
1794         *p++ = cpu_to_be32(OP_SEQUENCE);
1795
1796         /*
1797          * Sessionid + seqid + slotid + max slotid + cache_this
1798          */
1799         dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
1800                 "max_slotid=%d cache_this=%d\n",
1801                 __func__,
1802                 ((u32 *)session->sess_id.data)[0],
1803                 ((u32 *)session->sess_id.data)[1],
1804                 ((u32 *)session->sess_id.data)[2],
1805                 ((u32 *)session->sess_id.data)[3],
1806                 slot->seq_nr, args->sa_slotid,
1807                 tp->highest_used_slotid, args->sa_cache_this);
1808         p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
1809         *p++ = cpu_to_be32(slot->seq_nr);
1810         *p++ = cpu_to_be32(args->sa_slotid);
1811         *p++ = cpu_to_be32(tp->highest_used_slotid);
1812         *p = cpu_to_be32(args->sa_cache_this);
1813         hdr->nops++;
1814         hdr->replen += decode_sequence_maxsz;
1815 #endif /* CONFIG_NFS_V4_1 */
1816 }
1817
1818 #ifdef CONFIG_NFS_V4_1
1819 static void
1820 encode_getdeviceinfo(struct xdr_stream *xdr,
1821                      const struct nfs4_getdeviceinfo_args *args,
1822                      struct compound_hdr *hdr)
1823 {
1824         __be32 *p;
1825
1826         p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE);
1827         *p++ = cpu_to_be32(OP_GETDEVICEINFO);
1828         p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data,
1829                                     NFS4_DEVICEID4_SIZE);
1830         *p++ = cpu_to_be32(args->pdev->layout_type);
1831         *p++ = cpu_to_be32(args->pdev->pglen);          /* gdia_maxcount */
1832         *p++ = cpu_to_be32(0);                          /* bitmap length 0 */
1833         hdr->nops++;
1834         hdr->replen += decode_getdeviceinfo_maxsz;
1835 }
1836
1837 static void
1838 encode_layoutget(struct xdr_stream *xdr,
1839                       const struct nfs4_layoutget_args *args,
1840                       struct compound_hdr *hdr)
1841 {
1842         __be32 *p;
1843
1844         p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
1845         *p++ = cpu_to_be32(OP_LAYOUTGET);
1846         *p++ = cpu_to_be32(0);     /* Signal layout available */
1847         *p++ = cpu_to_be32(args->type);
1848         *p++ = cpu_to_be32(args->range.iomode);
1849         p = xdr_encode_hyper(p, args->range.offset);
1850         p = xdr_encode_hyper(p, args->range.length);
1851         p = xdr_encode_hyper(p, args->minlength);
1852         p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
1853         *p = cpu_to_be32(args->maxcount);
1854
1855         dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n",
1856                 __func__,
1857                 args->type,
1858                 args->range.iomode,
1859                 (unsigned long)args->range.offset,
1860                 (unsigned long)args->range.length,
1861                 args->maxcount);
1862         hdr->nops++;
1863         hdr->replen += decode_layoutget_maxsz;
1864 }
1865
1866 static int
1867 encode_layoutcommit(struct xdr_stream *xdr,
1868                     const struct nfs4_layoutcommit_args *args,
1869                     struct compound_hdr *hdr)
1870 {
1871         __be32 *p;
1872
1873         dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
1874                 NFS_SERVER(args->inode)->pnfs_curr_ld->id);
1875
1876         p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
1877         *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
1878         /* Only whole file layouts */
1879         p = xdr_encode_hyper(p, 0); /* offset */
1880         p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
1881         *p++ = cpu_to_be32(0); /* reclaim */
1882         p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
1883         *p++ = cpu_to_be32(1); /* newoffset = TRUE */
1884         p = xdr_encode_hyper(p, args->lastbytewritten);
1885         *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
1886         *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
1887         *p++ = cpu_to_be32(0); /* no file layout payload */
1888
1889         hdr->nops++;
1890         hdr->replen += decode_layoutcommit_maxsz;
1891         return 0;
1892 }
1893 #endif /* CONFIG_NFS_V4_1 */
1894
1895 /*
1896  * END OF "GENERIC" ENCODE ROUTINES.
1897  */
1898
1899 static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
1900 {
1901 #if defined(CONFIG_NFS_V4_1)
1902         if (args->sa_session)
1903                 return args->sa_session->clp->cl_mvops->minor_version;
1904 #endif /* CONFIG_NFS_V4_1 */
1905         return 0;
1906 }
1907
1908 /*
1909  * Encode an ACCESS request
1910  */
1911 static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr,
1912                                 const struct nfs4_accessargs *args)
1913 {
1914         struct compound_hdr hdr = {
1915                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1916         };
1917
1918         encode_compound_hdr(xdr, req, &hdr);
1919         encode_sequence(xdr, &args->seq_args, &hdr);
1920         encode_putfh(xdr, args->fh, &hdr);
1921         encode_access(xdr, args->access, &hdr);
1922         encode_getfattr(xdr, args->bitmask, &hdr);
1923         encode_nops(&hdr);
1924 }
1925
1926 /*
1927  * Encode LOOKUP request
1928  */
1929 static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr,
1930                                 const struct nfs4_lookup_arg *args)
1931 {
1932         struct compound_hdr hdr = {
1933                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1934         };
1935
1936         encode_compound_hdr(xdr, req, &hdr);
1937         encode_sequence(xdr, &args->seq_args, &hdr);
1938         encode_putfh(xdr, args->dir_fh, &hdr);
1939         encode_lookup(xdr, args->name, &hdr);
1940         encode_getfh(xdr, &hdr);
1941         encode_getfattr(xdr, args->bitmask, &hdr);
1942         encode_nops(&hdr);
1943 }
1944
1945 /*
1946  * Encode LOOKUP_ROOT request
1947  */
1948 static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req,
1949                                      struct xdr_stream *xdr,
1950                                      const struct nfs4_lookup_root_arg *args)
1951 {
1952         struct compound_hdr hdr = {
1953                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1954         };
1955
1956         encode_compound_hdr(xdr, req, &hdr);
1957         encode_sequence(xdr, &args->seq_args, &hdr);
1958         encode_putrootfh(xdr, &hdr);
1959         encode_getfh(xdr, &hdr);
1960         encode_getfattr(xdr, args->bitmask, &hdr);
1961         encode_nops(&hdr);
1962 }
1963
1964 /*
1965  * Encode REMOVE request
1966  */
1967 static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr,
1968                                 const struct nfs_removeargs *args)
1969 {
1970         struct compound_hdr hdr = {
1971                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1972         };
1973
1974         encode_compound_hdr(xdr, req, &hdr);
1975         encode_sequence(xdr, &args->seq_args, &hdr);
1976         encode_putfh(xdr, args->fh, &hdr);
1977         encode_remove(xdr, &args->name, &hdr);
1978         encode_getfattr(xdr, args->bitmask, &hdr);
1979         encode_nops(&hdr);
1980 }
1981
1982 /*
1983  * Encode RENAME request
1984  */
1985 static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr,
1986                                 const struct nfs_renameargs *args)
1987 {
1988         struct compound_hdr hdr = {
1989                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
1990         };
1991
1992         encode_compound_hdr(xdr, req, &hdr);
1993         encode_sequence(xdr, &args->seq_args, &hdr);
1994         encode_putfh(xdr, args->old_dir, &hdr);
1995         encode_savefh(xdr, &hdr);
1996         encode_putfh(xdr, args->new_dir, &hdr);
1997         encode_rename(xdr, args->old_name, args->new_name, &hdr);
1998         encode_getfattr(xdr, args->bitmask, &hdr);
1999         encode_restorefh(xdr, &hdr);
2000         encode_getfattr(xdr, args->bitmask, &hdr);
2001         encode_nops(&hdr);
2002 }
2003
2004 /*
2005  * Encode LINK request
2006  */
2007 static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr,
2008                              const struct nfs4_link_arg *args)
2009 {
2010         struct compound_hdr hdr = {
2011                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2012         };
2013
2014         encode_compound_hdr(xdr, req, &hdr);
2015         encode_sequence(xdr, &args->seq_args, &hdr);
2016         encode_putfh(xdr, args->fh, &hdr);
2017         encode_savefh(xdr, &hdr);
2018         encode_putfh(xdr, args->dir_fh, &hdr);
2019         encode_link(xdr, args->name, &hdr);
2020         encode_getfattr(xdr, args->bitmask, &hdr);
2021         encode_restorefh(xdr, &hdr);
2022         encode_getfattr(xdr, args->bitmask, &hdr);
2023         encode_nops(&hdr);
2024 }
2025
2026 /*
2027  * Encode CREATE request
2028  */
2029 static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr,
2030                                 const struct nfs4_create_arg *args)
2031 {
2032         struct compound_hdr hdr = {
2033                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2034         };
2035
2036         encode_compound_hdr(xdr, req, &hdr);
2037         encode_sequence(xdr, &args->seq_args, &hdr);
2038         encode_putfh(xdr, args->dir_fh, &hdr);
2039         encode_savefh(xdr, &hdr);
2040         encode_create(xdr, args, &hdr);
2041         encode_getfh(xdr, &hdr);
2042         encode_getfattr(xdr, args->bitmask, &hdr);
2043         encode_restorefh(xdr, &hdr);
2044         encode_getfattr(xdr, args->bitmask, &hdr);
2045         encode_nops(&hdr);
2046 }
2047
2048 /*
2049  * Encode SYMLINK request
2050  */
2051 static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2052                                  const struct nfs4_create_arg *args)
2053 {
2054         nfs4_xdr_enc_create(req, xdr, args);
2055 }
2056
2057 /*
2058  * Encode GETATTR request
2059  */
2060 static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2061                                  const struct nfs4_getattr_arg *args)
2062 {
2063         struct compound_hdr hdr = {
2064                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2065         };
2066
2067         encode_compound_hdr(xdr, req, &hdr);
2068         encode_sequence(xdr, &args->seq_args, &hdr);
2069         encode_putfh(xdr, args->fh, &hdr);
2070         encode_getfattr(xdr, args->bitmask, &hdr);
2071         encode_nops(&hdr);
2072 }
2073
2074 /*
2075  * Encode a CLOSE request
2076  */
2077 static void nfs4_xdr_enc_close(struct rpc_rqst *req, 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_close(xdr, args, &hdr);
2088         encode_getfattr(xdr, args->bitmask, &hdr);
2089         encode_nops(&hdr);
2090 }
2091
2092 /*
2093  * Encode an OPEN request
2094  */
2095 static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
2096                               struct nfs_openargs *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_savefh(xdr, &hdr);
2106         encode_open(xdr, args, &hdr);
2107         encode_getfh(xdr, &hdr);
2108         encode_getfattr(xdr, args->bitmask, &hdr);
2109         encode_restorefh(xdr, &hdr);
2110         encode_getfattr(xdr, args->bitmask, &hdr);
2111         encode_nops(&hdr);
2112 }
2113
2114 /*
2115  * Encode an OPEN_CONFIRM request
2116  */
2117 static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req,
2118                                       struct xdr_stream *xdr,
2119                                       struct nfs_open_confirmargs *args)
2120 {
2121         struct compound_hdr hdr = {
2122                 .nops   = 0,
2123         };
2124
2125         encode_compound_hdr(xdr, req, &hdr);
2126         encode_putfh(xdr, args->fh, &hdr);
2127         encode_open_confirm(xdr, args, &hdr);
2128         encode_nops(&hdr);
2129 }
2130
2131 /*
2132  * Encode an OPEN request with no attributes.
2133  */
2134 static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
2135                                      struct xdr_stream *xdr,
2136                                      struct nfs_openargs *args)
2137 {
2138         struct compound_hdr hdr = {
2139                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2140         };
2141
2142         encode_compound_hdr(xdr, req, &hdr);
2143         encode_sequence(xdr, &args->seq_args, &hdr);
2144         encode_putfh(xdr, args->fh, &hdr);
2145         encode_open(xdr, args, &hdr);
2146         encode_getfattr(xdr, args->bitmask, &hdr);
2147         encode_nops(&hdr);
2148 }
2149
2150 /*
2151  * Encode an OPEN_DOWNGRADE request
2152  */
2153 static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
2154                                         struct xdr_stream *xdr,
2155                                         struct nfs_closeargs *args)
2156 {
2157         struct compound_hdr hdr = {
2158                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2159         };
2160
2161         encode_compound_hdr(xdr, req, &hdr);
2162         encode_sequence(xdr, &args->seq_args, &hdr);
2163         encode_putfh(xdr, args->fh, &hdr);
2164         encode_open_downgrade(xdr, args, &hdr);
2165         encode_getfattr(xdr, args->bitmask, &hdr);
2166         encode_nops(&hdr);
2167 }
2168
2169 /*
2170  * Encode a LOCK request
2171  */
2172 static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr,
2173                               struct nfs_lock_args *args)
2174 {
2175         struct compound_hdr hdr = {
2176                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2177         };
2178
2179         encode_compound_hdr(xdr, req, &hdr);
2180         encode_sequence(xdr, &args->seq_args, &hdr);
2181         encode_putfh(xdr, args->fh, &hdr);
2182         encode_lock(xdr, args, &hdr);
2183         encode_nops(&hdr);
2184 }
2185
2186 /*
2187  * Encode a LOCKT request
2188  */
2189 static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr,
2190                                struct nfs_lockt_args *args)
2191 {
2192         struct compound_hdr hdr = {
2193                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2194         };
2195
2196         encode_compound_hdr(xdr, req, &hdr);
2197         encode_sequence(xdr, &args->seq_args, &hdr);
2198         encode_putfh(xdr, args->fh, &hdr);
2199         encode_lockt(xdr, args, &hdr);
2200         encode_nops(&hdr);
2201 }
2202
2203 /*
2204  * Encode a LOCKU request
2205  */
2206 static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr,
2207                                struct nfs_locku_args *args)
2208 {
2209         struct compound_hdr hdr = {
2210                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2211         };
2212
2213         encode_compound_hdr(xdr, req, &hdr);
2214         encode_sequence(xdr, &args->seq_args, &hdr);
2215         encode_putfh(xdr, args->fh, &hdr);
2216         encode_locku(xdr, args, &hdr);
2217         encode_nops(&hdr);
2218 }
2219
2220 static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req,
2221                                            struct xdr_stream *xdr,
2222                                         struct nfs_release_lockowner_args *args)
2223 {
2224         struct compound_hdr hdr = {
2225                 .minorversion = 0,
2226         };
2227
2228         encode_compound_hdr(xdr, req, &hdr);
2229         encode_release_lockowner(xdr, &args->lock_owner, &hdr);
2230         encode_nops(&hdr);
2231 }
2232
2233 /*
2234  * Encode a READLINK request
2235  */
2236 static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
2237                                   const struct nfs4_readlink *args)
2238 {
2239         struct compound_hdr hdr = {
2240                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2241         };
2242
2243         encode_compound_hdr(xdr, req, &hdr);
2244         encode_sequence(xdr, &args->seq_args, &hdr);
2245         encode_putfh(xdr, args->fh, &hdr);
2246         encode_readlink(xdr, args, req, &hdr);
2247
2248         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2249                         args->pgbase, args->pglen);
2250         encode_nops(&hdr);
2251 }
2252
2253 /*
2254  * Encode a READDIR request
2255  */
2256 static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
2257                                  const struct nfs4_readdir_arg *args)
2258 {
2259         struct compound_hdr hdr = {
2260                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2261         };
2262
2263         encode_compound_hdr(xdr, req, &hdr);
2264         encode_sequence(xdr, &args->seq_args, &hdr);
2265         encode_putfh(xdr, args->fh, &hdr);
2266         encode_readdir(xdr, args, req, &hdr);
2267
2268         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
2269                          args->pgbase, args->count);
2270         dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
2271                         __func__, hdr.replen << 2, args->pages,
2272                         args->pgbase, args->count);
2273         encode_nops(&hdr);
2274 }
2275
2276 /*
2277  * Encode a READ request
2278  */
2279 static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
2280                               struct nfs_readargs *args)
2281 {
2282         struct compound_hdr hdr = {
2283                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2284         };
2285
2286         encode_compound_hdr(xdr, req, &hdr);
2287         encode_sequence(xdr, &args->seq_args, &hdr);
2288         encode_putfh(xdr, args->fh, &hdr);
2289         encode_read(xdr, args, &hdr);
2290
2291         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2292                          args->pages, args->pgbase, args->count);
2293         req->rq_rcv_buf.flags |= XDRBUF_READ;
2294         encode_nops(&hdr);
2295 }
2296
2297 /*
2298  * Encode an SETATTR request
2299  */
2300 static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr,
2301                                  struct nfs_setattrargs *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_setattr(xdr, args, args->server, &hdr);
2311         encode_getfattr(xdr, args->bitmask, &hdr);
2312         encode_nops(&hdr);
2313 }
2314
2315 /*
2316  * Encode a GETACL request
2317  */
2318 static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
2319                                 struct nfs_getaclargs *args)
2320 {
2321         struct compound_hdr hdr = {
2322                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2323         };
2324         uint32_t replen;
2325
2326         encode_compound_hdr(xdr, req, &hdr);
2327         encode_sequence(xdr, &args->seq_args, &hdr);
2328         encode_putfh(xdr, args->fh, &hdr);
2329         replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1;
2330         encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr);
2331
2332         xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
2333                 args->acl_pages, args->acl_pgbase, args->acl_len);
2334         encode_nops(&hdr);
2335 }
2336
2337 /*
2338  * Encode a WRITE request
2339  */
2340 static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr,
2341                                struct nfs_writeargs *args)
2342 {
2343         struct compound_hdr hdr = {
2344                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2345         };
2346
2347         encode_compound_hdr(xdr, req, &hdr);
2348         encode_sequence(xdr, &args->seq_args, &hdr);
2349         encode_putfh(xdr, args->fh, &hdr);
2350         encode_write(xdr, args, &hdr);
2351         req->rq_snd_buf.flags |= XDRBUF_WRITE;
2352         if (args->bitmask)
2353                 encode_getfattr(xdr, args->bitmask, &hdr);
2354         encode_nops(&hdr);
2355 }
2356
2357 /*
2358  *  a COMMIT request
2359  */
2360 static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
2361                                 struct nfs_writeargs *args)
2362 {
2363         struct compound_hdr hdr = {
2364                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2365         };
2366
2367         encode_compound_hdr(xdr, req, &hdr);
2368         encode_sequence(xdr, &args->seq_args, &hdr);
2369         encode_putfh(xdr, args->fh, &hdr);
2370         encode_commit(xdr, args, &hdr);
2371         if (args->bitmask)
2372                 encode_getfattr(xdr, args->bitmask, &hdr);
2373         encode_nops(&hdr);
2374 }
2375
2376 /*
2377  * FSINFO request
2378  */
2379 static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
2380                                 struct nfs4_fsinfo_arg *args)
2381 {
2382         struct compound_hdr hdr = {
2383                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2384         };
2385
2386         encode_compound_hdr(xdr, req, &hdr);
2387         encode_sequence(xdr, &args->seq_args, &hdr);
2388         encode_putfh(xdr, args->fh, &hdr);
2389         encode_fsinfo(xdr, args->bitmask, &hdr);
2390         encode_nops(&hdr);
2391 }
2392
2393 /*
2394  * a PATHCONF request
2395  */
2396 static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
2397                                   const struct nfs4_pathconf_arg *args)
2398 {
2399         struct compound_hdr hdr = {
2400                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2401         };
2402
2403         encode_compound_hdr(xdr, req, &hdr);
2404         encode_sequence(xdr, &args->seq_args, &hdr);
2405         encode_putfh(xdr, args->fh, &hdr);
2406         encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0],
2407                            &hdr);
2408         encode_nops(&hdr);
2409 }
2410
2411 /*
2412  * a STATFS request
2413  */
2414 static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
2415                                 const struct nfs4_statfs_arg *args)
2416 {
2417         struct compound_hdr hdr = {
2418                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2419         };
2420
2421         encode_compound_hdr(xdr, req, &hdr);
2422         encode_sequence(xdr, &args->seq_args, &hdr);
2423         encode_putfh(xdr, args->fh, &hdr);
2424         encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0],
2425                            args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr);
2426         encode_nops(&hdr);
2427 }
2428
2429 /*
2430  * GETATTR_BITMAP request
2431  */
2432 static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req,
2433                                      struct xdr_stream *xdr,
2434                                      struct nfs4_server_caps_arg *args)
2435 {
2436         struct compound_hdr hdr = {
2437                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2438         };
2439
2440         encode_compound_hdr(xdr, req, &hdr);
2441         encode_sequence(xdr, &args->seq_args, &hdr);
2442         encode_putfh(xdr, args->fhandle, &hdr);
2443         encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS|
2444                            FATTR4_WORD0_LINK_SUPPORT|
2445                            FATTR4_WORD0_SYMLINK_SUPPORT|
2446                            FATTR4_WORD0_ACLSUPPORT, &hdr);
2447         encode_nops(&hdr);
2448 }
2449
2450 /*
2451  * a RENEW request
2452  */
2453 static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr,
2454                                struct nfs_client *clp)
2455 {
2456         struct compound_hdr hdr = {
2457                 .nops   = 0,
2458         };
2459
2460         encode_compound_hdr(xdr, req, &hdr);
2461         encode_renew(xdr, clp, &hdr);
2462         encode_nops(&hdr);
2463 }
2464
2465 /*
2466  * a SETCLIENTID request
2467  */
2468 static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req,
2469                                      struct xdr_stream *xdr,
2470                                      struct nfs4_setclientid *sc)
2471 {
2472         struct compound_hdr hdr = {
2473                 .nops   = 0,
2474         };
2475
2476         encode_compound_hdr(xdr, req, &hdr);
2477         encode_setclientid(xdr, sc, &hdr);
2478         encode_nops(&hdr);
2479 }
2480
2481 /*
2482  * a SETCLIENTID_CONFIRM request
2483  */
2484 static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req,
2485                                              struct xdr_stream *xdr,
2486                                              struct nfs4_setclientid_res *arg)
2487 {
2488         struct compound_hdr hdr = {
2489                 .nops   = 0,
2490         };
2491         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2492
2493         encode_compound_hdr(xdr, req, &hdr);
2494         encode_setclientid_confirm(xdr, arg, &hdr);
2495         encode_putrootfh(xdr, &hdr);
2496         encode_fsinfo(xdr, lease_bitmap, &hdr);
2497         encode_nops(&hdr);
2498 }
2499
2500 /*
2501  * DELEGRETURN request
2502  */
2503 static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
2504                                      struct xdr_stream *xdr,
2505                                      const struct nfs4_delegreturnargs *args)
2506 {
2507         struct compound_hdr hdr = {
2508                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2509         };
2510
2511         encode_compound_hdr(xdr, req, &hdr);
2512         encode_sequence(xdr, &args->seq_args, &hdr);
2513         encode_putfh(xdr, args->fhandle, &hdr);
2514         encode_delegreturn(xdr, args->stateid, &hdr);
2515         encode_getfattr(xdr, args->bitmask, &hdr);
2516         encode_nops(&hdr);
2517 }
2518
2519 /*
2520  * Encode FS_LOCATIONS request
2521  */
2522 static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
2523                                       struct xdr_stream *xdr,
2524                                       struct nfs4_fs_locations_arg *args)
2525 {
2526         struct compound_hdr hdr = {
2527                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2528         };
2529         uint32_t replen;
2530
2531         encode_compound_hdr(xdr, req, &hdr);
2532         encode_sequence(xdr, &args->seq_args, &hdr);
2533         encode_putfh(xdr, args->dir_fh, &hdr);
2534         encode_lookup(xdr, args->name, &hdr);
2535         replen = hdr.replen;    /* get the attribute into args->page */
2536         encode_fs_locations(xdr, args->bitmask, &hdr);
2537
2538         xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
2539                         0, PAGE_SIZE);
2540         encode_nops(&hdr);
2541 }
2542
2543 /*
2544  * Encode SECINFO request
2545  */
2546 static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
2547                                 struct xdr_stream *xdr,
2548                                 struct nfs4_secinfo_arg *args)
2549 {
2550         struct compound_hdr hdr = {
2551                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2552         };
2553
2554         encode_compound_hdr(xdr, req, &hdr);
2555         encode_sequence(xdr, &args->seq_args, &hdr);
2556         encode_putfh(xdr, args->dir_fh, &hdr);
2557         encode_secinfo(xdr, args->name, &hdr);
2558         encode_nops(&hdr);
2559 }
2560
2561 #if defined(CONFIG_NFS_V4_1)
2562 /*
2563  * EXCHANGE_ID request
2564  */
2565 static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req,
2566                                      struct xdr_stream *xdr,
2567                                      struct nfs41_exchange_id_args *args)
2568 {
2569         struct compound_hdr hdr = {
2570                 .minorversion = args->client->cl_mvops->minor_version,
2571         };
2572
2573         encode_compound_hdr(xdr, req, &hdr);
2574         encode_exchange_id(xdr, args, &hdr);
2575         encode_nops(&hdr);
2576 }
2577
2578 /*
2579  * a CREATE_SESSION request
2580  */
2581 static void nfs4_xdr_enc_create_session(struct rpc_rqst *req,
2582                                         struct xdr_stream *xdr,
2583                                         struct nfs41_create_session_args *args)
2584 {
2585         struct compound_hdr hdr = {
2586                 .minorversion = args->client->cl_mvops->minor_version,
2587         };
2588
2589         encode_compound_hdr(xdr, req, &hdr);
2590         encode_create_session(xdr, args, &hdr);
2591         encode_nops(&hdr);
2592 }
2593
2594 /*
2595  * a DESTROY_SESSION request
2596  */
2597 static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req,
2598                                          struct xdr_stream *xdr,
2599                                          struct nfs4_session *session)
2600 {
2601         struct compound_hdr hdr = {
2602                 .minorversion = session->clp->cl_mvops->minor_version,
2603         };
2604
2605         encode_compound_hdr(xdr, req, &hdr);
2606         encode_destroy_session(xdr, session, &hdr);
2607         encode_nops(&hdr);
2608 }
2609
2610 /*
2611  * a SEQUENCE request
2612  */
2613 static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr,
2614                                   struct nfs4_sequence_args *args)
2615 {
2616         struct compound_hdr hdr = {
2617                 .minorversion = nfs4_xdr_minorversion(args),
2618         };
2619
2620         encode_compound_hdr(xdr, req, &hdr);
2621         encode_sequence(xdr, args, &hdr);
2622         encode_nops(&hdr);
2623 }
2624
2625 /*
2626  * a GET_LEASE_TIME request
2627  */
2628 static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
2629                                         struct xdr_stream *xdr,
2630                                         struct nfs4_get_lease_time_args *args)
2631 {
2632         struct compound_hdr hdr = {
2633                 .minorversion = nfs4_xdr_minorversion(&args->la_seq_args),
2634         };
2635         const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 };
2636
2637         encode_compound_hdr(xdr, req, &hdr);
2638         encode_sequence(xdr, &args->la_seq_args, &hdr);
2639         encode_putrootfh(xdr, &hdr);
2640         encode_fsinfo(xdr, lease_bitmap, &hdr);
2641         encode_nops(&hdr);
2642 }
2643
2644 /*
2645  * a RECLAIM_COMPLETE request
2646  */
2647 static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req,
2648                                           struct xdr_stream *xdr,
2649                                 struct nfs41_reclaim_complete_args *args)
2650 {
2651         struct compound_hdr hdr = {
2652                 .minorversion = nfs4_xdr_minorversion(&args->seq_args)
2653         };
2654
2655         encode_compound_hdr(xdr, req, &hdr);
2656         encode_sequence(xdr, &args->seq_args, &hdr);
2657         encode_reclaim_complete(xdr, args, &hdr);
2658         encode_nops(&hdr);
2659 }
2660
2661 /*
2662  * Encode GETDEVICEINFO request
2663  */
2664 static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
2665                                        struct xdr_stream *xdr,
2666                                        struct nfs4_getdeviceinfo_args *args)
2667 {
2668         struct compound_hdr hdr = {
2669                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2670         };
2671
2672         encode_compound_hdr(xdr, req, &hdr);
2673         encode_sequence(xdr, &args->seq_args, &hdr);
2674         encode_getdeviceinfo(xdr, args, &hdr);
2675
2676         /* set up reply kvec. Subtract notification bitmap max size (2)
2677          * so that notification bitmap is put in xdr_buf tail */
2678         xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
2679                          args->pdev->pages, args->pdev->pgbase,
2680                          args->pdev->pglen);
2681
2682         encode_nops(&hdr);
2683 }
2684
2685 /*
2686  *  Encode LAYOUTGET request
2687  */
2688 static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
2689                                    struct xdr_stream *xdr,
2690                                    struct nfs4_layoutget_args *args)
2691 {
2692         struct compound_hdr hdr = {
2693                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2694         };
2695
2696         encode_compound_hdr(xdr, req, &hdr);
2697         encode_sequence(xdr, &args->seq_args, &hdr);
2698         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2699         encode_layoutget(xdr, args, &hdr);
2700
2701         xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
2702             args->layout.pages, 0, args->layout.pglen);
2703
2704         encode_nops(&hdr);
2705 }
2706
2707 /*
2708  *  Encode LAYOUTCOMMIT request
2709  */
2710 static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
2711                                      struct xdr_stream *xdr,
2712                                      struct nfs4_layoutcommit_args *args)
2713 {
2714         struct compound_hdr hdr = {
2715                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
2716         };
2717
2718         encode_compound_hdr(xdr, req, &hdr);
2719         encode_sequence(xdr, &args->seq_args, &hdr);
2720         encode_putfh(xdr, NFS_FH(args->inode), &hdr);
2721         encode_layoutcommit(xdr, args, &hdr);
2722         encode_getfattr(xdr, args->bitmask, &hdr);
2723         encode_nops(&hdr);
2724         return 0;
2725 }
2726 #endif /* CONFIG_NFS_V4_1 */
2727
2728 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
2729 {
2730         dprintk("nfs: %s: prematurely hit end of receive buffer. "
2731                 "Remaining buffer length is %tu words.\n",
2732                 func, xdr->end - xdr->p);
2733 }
2734
2735 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
2736 {
2737         __be32 *p;
2738
2739         p = xdr_inline_decode(xdr, 4);
2740         if (unlikely(!p))
2741                 goto out_overflow;
2742         *len = be32_to_cpup(p);
2743         p = xdr_inline_decode(xdr, *len);
2744         if (unlikely(!p))
2745                 goto out_overflow;
2746         *string = (char *)p;
2747         return 0;
2748 out_overflow:
2749         print_overflow_msg(__func__, xdr);
2750         return -EIO;
2751 }
2752
2753 static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
2754 {
2755         __be32 *p;
2756
2757         p = xdr_inline_decode(xdr, 8);
2758         if (unlikely(!p))
2759                 goto out_overflow;
2760         hdr->status = be32_to_cpup(p++);
2761         hdr->taglen = be32_to_cpup(p);
2762
2763         p = xdr_inline_decode(xdr, hdr->taglen + 4);
2764         if (unlikely(!p))
2765                 goto out_overflow;
2766         hdr->tag = (char *)p;
2767         p += XDR_QUADLEN(hdr->taglen);
2768         hdr->nops = be32_to_cpup(p);
2769         if (unlikely(hdr->nops < 1))
2770                 return nfs4_stat_to_errno(hdr->status);
2771         return 0;
2772 out_overflow:
2773         print_overflow_msg(__func__, xdr);
2774         return -EIO;
2775 }
2776
2777 static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
2778 {
2779         __be32 *p;
2780         uint32_t opnum;
2781         int32_t nfserr;
2782
2783         p = xdr_inline_decode(xdr, 8);
2784         if (unlikely(!p))
2785                 goto out_overflow;
2786         opnum = be32_to_cpup(p++);
2787         if (opnum != expected) {
2788                 dprintk("nfs: Server returned operation"
2789                         " %d but we issued a request for %d\n",
2790                                 opnum, expected);
2791                 return -EIO;
2792         }
2793         nfserr = be32_to_cpup(p);
2794         if (nfserr != NFS_OK)
2795                 return nfs4_stat_to_errno(nfserr);
2796         return 0;
2797 out_overflow:
2798         print_overflow_msg(__func__, xdr);
2799         return -EIO;
2800 }
2801
2802 /* Dummy routine */
2803 static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
2804 {
2805         __be32 *p;
2806         unsigned int strlen;
2807         char *str;
2808
2809         p = xdr_inline_decode(xdr, 12);
2810         if (likely(p))
2811                 return decode_opaque_inline(xdr, &strlen, &str);
2812         print_overflow_msg(__func__, xdr);
2813         return -EIO;
2814 }
2815
2816 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
2817 {
2818         uint32_t bmlen;
2819         __be32 *p;
2820
2821         p = xdr_inline_decode(xdr, 4);
2822         if (unlikely(!p))
2823                 goto out_overflow;
2824         bmlen = be32_to_cpup(p);
2825
2826         bitmap[0] = bitmap[1] = 0;
2827         p = xdr_inline_decode(xdr, (bmlen << 2));
2828         if (unlikely(!p))
2829                 goto out_overflow;
2830         if (bmlen > 0) {
2831                 bitmap[0] = be32_to_cpup(p++);
2832                 if (bmlen > 1)
2833                         bitmap[1] = be32_to_cpup(p);
2834         }
2835         return 0;
2836 out_overflow:
2837         print_overflow_msg(__func__, xdr);
2838         return -EIO;
2839 }
2840
2841 static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep)
2842 {
2843         __be32 *p;
2844
2845         p = xdr_inline_decode(xdr, 4);
2846         if (unlikely(!p))
2847                 goto out_overflow;
2848         *attrlen = be32_to_cpup(p);
2849         *savep = xdr->p;
2850         return 0;
2851 out_overflow:
2852         print_overflow_msg(__func__, xdr);
2853         return -EIO;
2854 }
2855
2856 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
2857 {
2858         if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
2859                 int ret;
2860                 ret = decode_attr_bitmap(xdr, bitmask);
2861                 if (unlikely(ret < 0))
2862                         return ret;
2863                 bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
2864         } else
2865                 bitmask[0] = bitmask[1] = 0;
2866         dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]);
2867         return 0;
2868 }
2869
2870 static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *type)
2871 {
2872         __be32 *p;
2873         int ret = 0;
2874
2875         *type = 0;
2876         if (unlikely(bitmap[0] & (FATTR4_WORD0_TYPE - 1U)))
2877                 return -EIO;
2878         if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
2879                 p = xdr_inline_decode(xdr, 4);
2880                 if (unlikely(!p))
2881                         goto out_overflow;
2882                 *type = be32_to_cpup(p);
2883                 if (*type < NF4REG || *type > NF4NAMEDATTR) {
2884                         dprintk("%s: bad type %d\n", __func__, *type);
2885                         return -EIO;
2886                 }
2887                 bitmap[0] &= ~FATTR4_WORD0_TYPE;
2888                 ret = NFS_ATTR_FATTR_TYPE;
2889         }
2890         dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
2891         return ret;
2892 out_overflow:
2893         print_overflow_msg(__func__, xdr);
2894         return -EIO;
2895 }
2896
2897 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
2898 {
2899         __be32 *p;
2900         int ret = 0;
2901
2902         *change = 0;
2903         if (unlikely(bitmap[0] & (FATTR4_WORD0_CHANGE - 1U)))
2904                 return -EIO;
2905         if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
2906                 p = xdr_inline_decode(xdr, 8);
2907                 if (unlikely(!p))
2908                         goto out_overflow;
2909                 xdr_decode_hyper(p, change);
2910                 bitmap[0] &= ~FATTR4_WORD0_CHANGE;
2911                 ret = NFS_ATTR_FATTR_CHANGE;
2912         }
2913         dprintk("%s: change attribute=%Lu\n", __func__,
2914                         (unsigned long long)*change);
2915         return ret;
2916 out_overflow:
2917         print_overflow_msg(__func__, xdr);
2918         return -EIO;
2919 }
2920
2921 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
2922 {
2923         __be32 *p;
2924         int ret = 0;
2925
2926         *size = 0;
2927         if (unlikely(bitmap[0] & (FATTR4_WORD0_SIZE - 1U)))
2928                 return -EIO;
2929         if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
2930                 p = xdr_inline_decode(xdr, 8);
2931                 if (unlikely(!p))
2932                         goto out_overflow;
2933                 xdr_decode_hyper(p, size);
2934                 bitmap[0] &= ~FATTR4_WORD0_SIZE;
2935                 ret = NFS_ATTR_FATTR_SIZE;
2936         }
2937         dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
2938         return ret;
2939 out_overflow:
2940         print_overflow_msg(__func__, xdr);
2941         return -EIO;
2942 }
2943
2944 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2945 {
2946         __be32 *p;
2947
2948         *res = 0;
2949         if (unlikely(bitmap[0] & (FATTR4_WORD0_LINK_SUPPORT - 1U)))
2950                 return -EIO;
2951         if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
2952                 p = xdr_inline_decode(xdr, 4);
2953                 if (unlikely(!p))
2954                         goto out_overflow;
2955                 *res = be32_to_cpup(p);
2956                 bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
2957         }
2958         dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
2959         return 0;
2960 out_overflow:
2961         print_overflow_msg(__func__, xdr);
2962         return -EIO;
2963 }
2964
2965 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
2966 {
2967         __be32 *p;
2968
2969         *res = 0;
2970         if (unlikely(bitmap[0] & (FATTR4_WORD0_SYMLINK_SUPPORT - 1U)))
2971                 return -EIO;
2972         if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
2973                 p = xdr_inline_decode(xdr, 4);
2974                 if (unlikely(!p))
2975                         goto out_overflow;
2976                 *res = be32_to_cpup(p);
2977                 bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
2978         }
2979         dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
2980         return 0;
2981 out_overflow:
2982         print_overflow_msg(__func__, xdr);
2983         return -EIO;
2984 }
2985
2986 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
2987 {
2988         __be32 *p;
2989         int ret = 0;
2990
2991         fsid->major = 0;
2992         fsid->minor = 0;
2993         if (unlikely(bitmap[0] & (FATTR4_WORD0_FSID - 1U)))
2994                 return -EIO;
2995         if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
2996                 p = xdr_inline_decode(xdr, 16);
2997                 if (unlikely(!p))
2998                         goto out_overflow;
2999                 p = xdr_decode_hyper(p, &fsid->major);
3000                 xdr_decode_hyper(p, &fsid->minor);
3001                 bitmap[0] &= ~FATTR4_WORD0_FSID;
3002                 ret = NFS_ATTR_FATTR_FSID;
3003         }
3004         dprintk("%s: fsid=(0x%Lx/0x%Lx)\n", __func__,
3005                         (unsigned long long)fsid->major,
3006                         (unsigned long long)fsid->minor);
3007         return ret;
3008 out_overflow:
3009         print_overflow_msg(__func__, xdr);
3010         return -EIO;
3011 }
3012
3013 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3014 {
3015         __be32 *p;
3016
3017         *res = 60;
3018         if (unlikely(bitmap[0] & (FATTR4_WORD0_LEASE_TIME - 1U)))
3019                 return -EIO;
3020         if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
3021                 p = xdr_inline_decode(xdr, 4);
3022                 if (unlikely(!p))
3023                         goto out_overflow;
3024                 *res = be32_to_cpup(p);
3025                 bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
3026         }
3027         dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
3028         return 0;
3029 out_overflow:
3030         print_overflow_msg(__func__, xdr);
3031         return -EIO;
3032 }
3033
3034 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
3035 {
3036         __be32 *p;
3037
3038         if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
3039                 return -EIO;
3040         if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
3041                 p = xdr_inline_decode(xdr, 4);
3042                 if (unlikely(!p))
3043                         goto out_overflow;
3044                 bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
3045                 return -be32_to_cpup(p);
3046         }
3047         return 0;
3048 out_overflow:
3049         print_overflow_msg(__func__, xdr);
3050         return -EIO;
3051 }
3052
3053 static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
3054 {
3055         __be32 *p;
3056         int len;
3057
3058         if (fh != NULL)
3059                 memset(fh, 0, sizeof(*fh));
3060
3061         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
3062                 return -EIO;
3063         if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
3064                 p = xdr_inline_decode(xdr, 4);
3065                 if (unlikely(!p))
3066                         goto out_overflow;
3067                 len = be32_to_cpup(p);
3068                 if (len > NFS4_FHSIZE)
3069                         return -EIO;
3070                 p = xdr_inline_decode(xdr, len);
3071                 if (unlikely(!p))
3072                         goto out_overflow;
3073                 if (fh != NULL) {
3074                         memcpy(fh->data, p, len);
3075                         fh->size = len;
3076                 }
3077                 bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
3078         }
3079         return 0;
3080 out_overflow:
3081         print_overflow_msg(__func__, xdr);
3082         return -EIO;
3083 }
3084
3085 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3086 {
3087         __be32 *p;
3088
3089         *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL;
3090         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U)))
3091                 return -EIO;
3092         if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
3093                 p = xdr_inline_decode(xdr, 4);
3094                 if (unlikely(!p))
3095                         goto out_overflow;
3096                 *res = be32_to_cpup(p);
3097                 bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
3098         }
3099         dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
3100         return 0;
3101 out_overflow:
3102         print_overflow_msg(__func__, xdr);
3103         return -EIO;
3104 }
3105
3106 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3107 {
3108         __be32 *p;
3109         int ret = 0;
3110
3111         *fileid = 0;
3112         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEID - 1U)))
3113                 return -EIO;
3114         if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
3115                 p = xdr_inline_decode(xdr, 8);
3116                 if (unlikely(!p))
3117                         goto out_overflow;
3118                 xdr_decode_hyper(p, fileid);
3119                 bitmap[0] &= ~FATTR4_WORD0_FILEID;
3120                 ret = NFS_ATTR_FATTR_FILEID;
3121         }
3122         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3123         return ret;
3124 out_overflow:
3125         print_overflow_msg(__func__, xdr);
3126         return -EIO;
3127 }
3128
3129 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
3130 {
3131         __be32 *p;
3132         int ret = 0;
3133
3134         *fileid = 0;
3135         if (unlikely(bitmap[1] & (FATTR4_WORD1_MOUNTED_ON_FILEID - 1U)))
3136                 return -EIO;
3137         if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
3138                 p = xdr_inline_decode(xdr, 8);
3139                 if (unlikely(!p))
3140                         goto out_overflow;
3141                 xdr_decode_hyper(p, fileid);
3142                 bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
3143                 ret = NFS_ATTR_FATTR_FILEID;
3144         }
3145         dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
3146         return ret;
3147 out_overflow:
3148         print_overflow_msg(__func__, xdr);
3149         return -EIO;
3150 }
3151
3152 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3153 {
3154         __be32 *p;
3155         int status = 0;
3156
3157         *res = 0;
3158         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_AVAIL - 1U)))
3159                 return -EIO;
3160         if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
3161                 p = xdr_inline_decode(xdr, 8);
3162                 if (unlikely(!p))
3163                         goto out_overflow;
3164                 xdr_decode_hyper(p, res);
3165                 bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
3166         }
3167         dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
3168         return status;
3169 out_overflow:
3170         print_overflow_msg(__func__, xdr);
3171         return -EIO;
3172 }
3173
3174 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3175 {
3176         __be32 *p;
3177         int status = 0;
3178
3179         *res = 0;
3180         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_FREE - 1U)))
3181                 return -EIO;
3182         if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
3183                 p = xdr_inline_decode(xdr, 8);
3184                 if (unlikely(!p))
3185                         goto out_overflow;
3186                 xdr_decode_hyper(p, res);
3187                 bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
3188         }
3189         dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
3190         return status;
3191 out_overflow:
3192         print_overflow_msg(__func__, xdr);
3193         return -EIO;
3194 }
3195
3196 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3197 {
3198         __be32 *p;
3199         int status = 0;
3200
3201         *res = 0;
3202         if (unlikely(bitmap[0] & (FATTR4_WORD0_FILES_TOTAL - 1U)))
3203                 return -EIO;
3204         if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
3205                 p = xdr_inline_decode(xdr, 8);
3206                 if (unlikely(!p))
3207                         goto out_overflow;
3208                 xdr_decode_hyper(p, res);
3209                 bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
3210         }
3211         dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
3212         return status;
3213 out_overflow:
3214         print_overflow_msg(__func__, xdr);
3215         return -EIO;
3216 }
3217
3218 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
3219 {
3220         u32 n;
3221         __be32 *p;
3222         int status = 0;
3223
3224         p = xdr_inline_decode(xdr, 4);
3225         if (unlikely(!p))
3226                 goto out_overflow;
3227         n = be32_to_cpup(p);
3228         if (n == 0)
3229                 goto root_path;
3230         dprintk("path ");
3231         path->ncomponents = 0;
3232         while (path->ncomponents < n) {
3233                 struct nfs4_string *component = &path->components[path->ncomponents];
3234                 status = decode_opaque_inline(xdr, &component->len, &component->data);
3235                 if (unlikely(status != 0))
3236                         goto out_eio;
3237                 if (path->ncomponents != n)
3238                         dprintk("/");
3239                 dprintk("%s", component->data);
3240                 if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
3241                         path->ncomponents++;
3242                 else {
3243                         dprintk("cannot parse %d components in path\n", n);
3244                         goto out_eio;
3245                 }
3246         }
3247 out:
3248         dprintk("\n");
3249         return status;
3250 root_path:
3251 /* a root pathname is sent as a zero component4 */
3252         path->ncomponents = 1;
3253         path->components[0].len=0;
3254         path->components[0].data=NULL;
3255         dprintk("path /\n");
3256         goto out;
3257 out_eio:
3258         dprintk(" status %d", status);
3259         status = -EIO;
3260         goto out;
3261 out_overflow:
3262         print_overflow_msg(__func__, xdr);
3263         return -EIO;
3264 }
3265
3266 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
3267 {
3268         int n;
3269         __be32 *p;
3270         int status = -EIO;
3271
3272         if (unlikely(bitmap[0] & (FATTR4_WORD0_FS_LOCATIONS -1U)))
3273                 goto out;
3274         status = 0;
3275         if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
3276                 goto out;
3277         dprintk("%s: fsroot ", __func__);
3278         status = decode_pathname(xdr, &res->fs_path);
3279         if (unlikely(status != 0))
3280                 goto out;
3281         p = xdr_inline_decode(xdr, 4);
3282         if (unlikely(!p))
3283                 goto out_overflow;
3284         n = be32_to_cpup(p);
3285         if (n <= 0)
3286                 goto out_eio;
3287         res->nlocations = 0;
3288         while (res->nlocations < n) {
3289                 u32 m;
3290                 struct nfs4_fs_location *loc = &res->locations[res->nlocations];
3291
3292                 p = xdr_inline_decode(xdr, 4);
3293                 if (unlikely(!p))
3294                         goto out_overflow;
3295                 m = be32_to_cpup(p);
3296
3297                 loc->nservers = 0;
3298                 dprintk("%s: servers ", __func__);
3299                 while (loc->nservers < m) {
3300                         struct nfs4_string *server = &loc->servers[loc->nservers];
3301                         status = decode_opaque_inline(xdr, &server->len, &server->data);
3302                         if (unlikely(status != 0))
3303                                 goto out_eio;
3304                         dprintk("%s ", server->data);
3305                         if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
3306                                 loc->nservers++;
3307                         else {
3308                                 unsigned int i;
3309                                 dprintk("%s: using first %u of %u servers "
3310                                         "returned for location %u\n",
3311                                                 __func__,
3312                                                 NFS4_FS_LOCATION_MAXSERVERS,
3313                                                 m, res->nlocations);
3314                                 for (i = loc->nservers; i < m; i++) {
3315                                         unsigned int len;
3316                                         char *data;
3317                                         status = decode_opaque_inline(xdr, &len, &data);
3318                                         if (unlikely(status != 0))
3319                                                 goto out_eio;
3320                                 }
3321                         }
3322                 }
3323                 status = decode_pathname(xdr, &loc->rootpath);
3324                 if (unlikely(status != 0))
3325                         goto out_eio;
3326                 if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
3327                         res->nlocations++;
3328         }
3329         if (res->nlocations != 0)
3330                 status = NFS_ATTR_FATTR_V4_REFERRAL;
3331 out:
3332         dprintk("%s: fs_locations done, error = %d\n", __func__, status);
3333         return status;
3334 out_overflow:
3335         print_overflow_msg(__func__, xdr);
3336 out_eio:
3337         status = -EIO;
3338         goto out;
3339 }
3340
3341 static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3342 {
3343         __be32 *p;
3344         int status = 0;
3345
3346         *res = 0;
3347         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXFILESIZE - 1U)))
3348                 return -EIO;
3349         if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
3350                 p = xdr_inline_decode(xdr, 8);
3351                 if (unlikely(!p))
3352                         goto out_overflow;
3353                 xdr_decode_hyper(p, res);
3354                 bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
3355         }
3356         dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
3357         return status;
3358 out_overflow:
3359         print_overflow_msg(__func__, xdr);
3360         return -EIO;
3361 }
3362
3363 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
3364 {
3365         __be32 *p;
3366         int status = 0;
3367
3368         *maxlink = 1;
3369         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXLINK - 1U)))
3370                 return -EIO;
3371         if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
3372                 p = xdr_inline_decode(xdr, 4);
3373                 if (unlikely(!p))
3374                         goto out_overflow;
3375                 *maxlink = be32_to_cpup(p);
3376                 bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
3377         }
3378         dprintk("%s: maxlink=%u\n", __func__, *maxlink);
3379         return status;
3380 out_overflow:
3381         print_overflow_msg(__func__, xdr);
3382         return -EIO;
3383 }
3384
3385 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
3386 {
3387         __be32 *p;
3388         int status = 0;
3389
3390         *maxname = 1024;
3391         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXNAME - 1U)))
3392                 return -EIO;
3393         if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
3394                 p = xdr_inline_decode(xdr, 4);
3395                 if (unlikely(!p))
3396                         goto out_overflow;
3397                 *maxname = be32_to_cpup(p);
3398                 bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
3399         }
3400         dprintk("%s: maxname=%u\n", __func__, *maxname);
3401         return status;
3402 out_overflow:
3403         print_overflow_msg(__func__, xdr);
3404         return -EIO;
3405 }
3406
3407 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3408 {
3409         __be32 *p;
3410         int status = 0;
3411
3412         *res = 1024;
3413         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXREAD - 1U)))
3414                 return -EIO;
3415         if (likely(bitmap[0] & FATTR4_WORD0_MAXREAD)) {
3416                 uint64_t maxread;
3417                 p = xdr_inline_decode(xdr, 8);
3418                 if (unlikely(!p))
3419                         goto out_overflow;
3420                 xdr_decode_hyper(p, &maxread);
3421                 if (maxread > 0x7FFFFFFF)
3422                         maxread = 0x7FFFFFFF;
3423                 *res = (uint32_t)maxread;
3424                 bitmap[0] &= ~FATTR4_WORD0_MAXREAD;
3425         }
3426         dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
3427         return status;
3428 out_overflow:
3429         print_overflow_msg(__func__, xdr);
3430         return -EIO;
3431 }
3432
3433 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
3434 {
3435         __be32 *p;
3436         int status = 0;
3437
3438         *res = 1024;
3439         if (unlikely(bitmap[0] & (FATTR4_WORD0_MAXWRITE - 1U)))
3440                 return -EIO;
3441         if (likely(bitmap[0] & FATTR4_WORD0_MAXWRITE)) {
3442                 uint64_t maxwrite;
3443                 p = xdr_inline_decode(xdr, 8);
3444                 if (unlikely(!p))
3445                         goto out_overflow;
3446                 xdr_decode_hyper(p, &maxwrite);
3447                 if (maxwrite > 0x7FFFFFFF)
3448                         maxwrite = 0x7FFFFFFF;
3449                 *res = (uint32_t)maxwrite;
3450                 bitmap[0] &= ~FATTR4_WORD0_MAXWRITE;
3451         }
3452         dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
3453         return status;
3454 out_overflow:
3455         print_overflow_msg(__func__, xdr);
3456         return -EIO;
3457 }
3458
3459 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
3460 {
3461         uint32_t tmp;
3462         __be32 *p;
3463         int ret = 0;
3464
3465         *mode = 0;
3466         if (unlikely(bitmap[1] & (FATTR4_WORD1_MODE - 1U)))
3467                 return -EIO;
3468         if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
3469                 p = xdr_inline_decode(xdr, 4);
3470                 if (unlikely(!p))
3471                         goto out_overflow;
3472                 tmp = be32_to_cpup(p);
3473                 *mode = tmp & ~S_IFMT;
3474                 bitmap[1] &= ~FATTR4_WORD1_MODE;
3475                 ret = NFS_ATTR_FATTR_MODE;
3476         }
3477         dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
3478         return ret;
3479 out_overflow:
3480         print_overflow_msg(__func__, xdr);
3481         return -EIO;
3482 }
3483
3484 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
3485 {
3486         __be32 *p;
3487         int ret = 0;
3488
3489         *nlink = 1;
3490         if (unlikely(bitmap[1] & (FATTR4_WORD1_NUMLINKS - 1U)))
3491                 return -EIO;
3492         if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
3493                 p = xdr_inline_decode(xdr, 4);
3494                 if (unlikely(!p))
3495                         goto out_overflow;
3496                 *nlink = be32_to_cpup(p);
3497                 bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
3498                 ret = NFS_ATTR_FATTR_NLINK;
3499         }
3500         dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
3501         return ret;
3502 out_overflow:
3503         print_overflow_msg(__func__, xdr);
3504         return -EIO;
3505 }
3506
3507 static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
3508                 const struct nfs_server *server, uint32_t *uid, int may_sleep)
3509 {
3510         uint32_t len;
3511         __be32 *p;
3512         int ret = 0;
3513
3514         *uid = -2;
3515         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U)))
3516                 return -EIO;
3517         if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) {
3518                 p = xdr_inline_decode(xdr, 4);
3519                 if (unlikely(!p))
3520                         goto out_overflow;
3521                 len = be32_to_cpup(p);
3522                 p = xdr_inline_decode(xdr, len);
3523                 if (unlikely(!p))
3524                         goto out_overflow;
3525                 if (!may_sleep) {
3526                         /* do nothing */
3527                 } else if (len < XDR_MAX_NETOBJ) {
3528                         if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0)
3529                                 ret = NFS_ATTR_FATTR_OWNER;
3530                         else
3531                                 dprintk("%s: nfs_map_name_to_uid failed!\n",
3532                                                 __func__);
3533                 } else
3534                         dprintk("%s: name too long (%u)!\n",
3535                                         __func__, len);
3536                 bitmap[1] &= ~FATTR4_WORD1_OWNER;
3537         }
3538         dprintk("%s: uid=%d\n", __func__, (int)*uid);
3539         return ret;
3540 out_overflow:
3541         print_overflow_msg(__func__, xdr);
3542         return -EIO;
3543 }
3544
3545 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
3546                 const struct nfs_server *server, uint32_t *gid, int may_sleep)
3547 {
3548         uint32_t len;
3549         __be32 *p;
3550         int ret = 0;
3551
3552         *gid = -2;
3553         if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U)))
3554                 return -EIO;
3555         if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) {
3556                 p = xdr_inline_decode(xdr, 4);
3557                 if (unlikely(!p))
3558                         goto out_overflow;
3559                 len = be32_to_cpup(p);
3560                 p = xdr_inline_decode(xdr, len);
3561                 if (unlikely(!p))
3562                         goto out_overflow;
3563                 if (!may_sleep) {
3564                         /* do nothing */
3565                 } else if (len < XDR_MAX_NETOBJ) {
3566                         if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0)
3567                                 ret = NFS_ATTR_FATTR_GROUP;
3568                         else
3569                                 dprintk("%s: nfs_map_group_to_gid failed!\n",
3570                                                 __func__);
3571                 } else
3572                         dprintk("%s: name too long (%u)!\n",
3573                                         __func__, len);
3574                 bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP;
3575         }
3576         dprintk("%s: gid=%d\n", __func__, (int)*gid);
3577         return ret;
3578 out_overflow:
3579         print_overflow_msg(__func__, xdr);
3580         return -EIO;
3581 }
3582
3583 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
3584 {
3585         uint32_t major = 0, minor = 0;
3586         __be32 *p;
3587         int ret = 0;
3588
3589         *rdev = MKDEV(0,0);
3590         if (unlikely(bitmap[1] & (FATTR4_WORD1_RAWDEV - 1U)))
3591                 return -EIO;
3592         if (likely(bitmap[1] & FATTR4_WORD1_RAWDEV)) {
3593                 dev_t tmp;
3594
3595                 p = xdr_inline_decode(xdr, 8);
3596                 if (unlikely(!p))
3597                         goto out_overflow;
3598                 major = be32_to_cpup(p++);
3599                 minor = be32_to_cpup(p);
3600                 tmp = MKDEV(major, minor);
3601                 if (MAJOR(tmp) == major && MINOR(tmp) == minor)
3602                         *rdev = tmp;
3603                 bitmap[1] &= ~ FATTR4_WORD1_RAWDEV;
3604                 ret = NFS_ATTR_FATTR_RDEV;
3605         }
3606         dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
3607         return ret;
3608 out_overflow:
3609         print_overflow_msg(__func__, xdr);
3610         return -EIO;
3611 }
3612
3613 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3614 {
3615         __be32 *p;
3616         int status = 0;
3617
3618         *res = 0;
3619         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_AVAIL - 1U)))
3620                 return -EIO;
3621         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
3622                 p = xdr_inline_decode(xdr, 8);
3623                 if (unlikely(!p))
3624                         goto out_overflow;
3625                 xdr_decode_hyper(p, res);
3626                 bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
3627         }
3628         dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
3629         return status;
3630 out_overflow:
3631         print_overflow_msg(__func__, xdr);
3632         return -EIO;
3633 }
3634
3635 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3636 {
3637         __be32 *p;
3638         int status = 0;
3639
3640         *res = 0;
3641         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_FREE - 1U)))
3642                 return -EIO;
3643         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
3644                 p = xdr_inline_decode(xdr, 8);
3645                 if (unlikely(!p))
3646                         goto out_overflow;
3647                 xdr_decode_hyper(p, res);
3648                 bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
3649         }
3650         dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
3651         return status;
3652 out_overflow:
3653         print_overflow_msg(__func__, xdr);
3654         return -EIO;
3655 }
3656
3657 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
3658 {
3659         __be32 *p;
3660         int status = 0;
3661
3662         *res = 0;
3663         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_TOTAL - 1U)))
3664                 return -EIO;
3665         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
3666                 p = xdr_inline_decode(xdr, 8);
3667                 if (unlikely(!p))
3668                         goto out_overflow;
3669                 xdr_decode_hyper(p, res);
3670                 bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
3671         }
3672         dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
3673         return status;
3674 out_overflow:
3675         print_overflow_msg(__func__, xdr);
3676         return -EIO;
3677 }
3678
3679 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
3680 {
3681         __be32 *p;
3682         int ret = 0;
3683
3684         *used = 0;
3685         if (unlikely(bitmap[1] & (FATTR4_WORD1_SPACE_USED - 1U)))
3686                 return -EIO;
3687         if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
3688                 p = xdr_inline_decode(xdr, 8);
3689                 if (unlikely(!p))
3690                         goto out_overflow;
3691                 xdr_decode_hyper(p, used);
3692                 bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
3693                 ret = NFS_ATTR_FATTR_SPACE_USED;
3694         }
3695         dprintk("%s: space used=%Lu\n", __func__,
3696                         (unsigned long long)*used);
3697         return ret;
3698 out_overflow:
3699         print_overflow_msg(__func__, xdr);
3700         return -EIO;
3701 }
3702
3703 static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
3704 {
3705         __be32 *p;
3706         uint64_t sec;
3707         uint32_t nsec;
3708
3709         p = xdr_inline_decode(xdr, 12);
3710         if (unlikely(!p))
3711                 goto out_overflow;
3712         p = xdr_decode_hyper(p, &sec);
3713         nsec = be32_to_cpup(p);
3714         time->tv_sec = (time_t)sec;
3715         time->tv_nsec = (long)nsec;
3716         return 0;
3717 out_overflow:
3718         print_overflow_msg(__func__, xdr);
3719         return -EIO;
3720 }
3721
3722 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3723 {
3724         int status = 0;
3725
3726         time->tv_sec = 0;
3727         time->tv_nsec = 0;
3728         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_ACCESS - 1U)))
3729                 return -EIO;
3730         if (likely(bitmap[1] & FATTR4_WORD1_TIME_ACCESS)) {
3731                 status = decode_attr_time(xdr, time);
3732                 if (status == 0)
3733                         status = NFS_ATTR_FATTR_ATIME;
3734                 bitmap[1] &= ~FATTR4_WORD1_TIME_ACCESS;
3735         }
3736         dprintk("%s: atime=%ld\n", __func__, (long)time->tv_sec);
3737         return status;
3738 }
3739
3740 static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3741 {
3742         int status = 0;
3743
3744         time->tv_sec = 0;
3745         time->tv_nsec = 0;
3746         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_METADATA - 1U)))
3747                 return -EIO;
3748         if (likely(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) {
3749                 status = decode_attr_time(xdr, time);
3750                 if (status == 0)
3751                         status = NFS_ATTR_FATTR_CTIME;
3752                 bitmap[1] &= ~FATTR4_WORD1_TIME_METADATA;
3753         }
3754         dprintk("%s: ctime=%ld\n", __func__, (long)time->tv_sec);
3755         return status;
3756 }
3757
3758 static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
3759                                   struct timespec *time)
3760 {
3761         int status = 0;
3762
3763         time->tv_sec = 0;
3764         time->tv_nsec = 0;
3765         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
3766                 return -EIO;
3767         if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
3768                 status = decode_attr_time(xdr, time);
3769                 bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
3770         }
3771         dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
3772                 (long)time->tv_nsec);
3773         return status;
3774 }
3775
3776 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
3777 {
3778         int status = 0;
3779
3780         time->tv_sec = 0;
3781         time->tv_nsec = 0;
3782         if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_MODIFY - 1U)))
3783                 return -EIO;
3784         if (likely(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) {
3785                 status = decode_attr_time(xdr, time);
3786                 if (status == 0)
3787                         status = NFS_ATTR_FATTR_MTIME;
3788                 bitmap[1] &= ~FATTR4_WORD1_TIME_MODIFY;
3789         }
3790         dprintk("%s: mtime=%ld\n", __func__, (long)time->tv_sec);
3791         return status;
3792 }
3793
3794 static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen)
3795 {
3796         unsigned int attrwords = XDR_QUADLEN(attrlen);
3797         unsigned int nwords = xdr->p - savep;
3798
3799         if (unlikely(attrwords != nwords)) {
3800                 dprintk("%s: server returned incorrect attribute length: "
3801                         "%u %c %u\n",
3802                                 __func__,
3803                                 attrwords << 2,
3804                                 (attrwords < nwords) ? '<' : '>',
3805                                 nwords << 2);
3806                 return -EIO;
3807         }
3808         return 0;
3809 }
3810
3811 static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3812 {
3813         __be32 *p;
3814
3815         p = xdr_inline_decode(xdr, 20);
3816         if (unlikely(!p))
3817                 goto out_overflow;
3818         cinfo->atomic = be32_to_cpup(p++);
3819         p = xdr_decode_hyper(p, &cinfo->before);
3820         xdr_decode_hyper(p, &cinfo->after);
3821         return 0;
3822 out_overflow:
3823         print_overflow_msg(__func__, xdr);
3824         return -EIO;
3825 }
3826
3827 static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access)
3828 {
3829         __be32 *p;
3830         uint32_t supp, acc;
3831         int status;
3832
3833         status = decode_op_hdr(xdr, OP_ACCESS);
3834         if (status)
3835                 return status;
3836         p = xdr_inline_decode(xdr, 8);
3837         if (unlikely(!p))
3838                 goto out_overflow;
3839         supp = be32_to_cpup(p++);
3840         acc = be32_to_cpup(p);
3841         access->supported = supp;
3842         access->access = acc;
3843         return 0;
3844 out_overflow:
3845         print_overflow_msg(__func__, xdr);
3846         return -EIO;
3847 }
3848
3849 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
3850 {
3851         __be32 *p;
3852
3853         p = xdr_inline_decode(xdr, len);
3854         if (likely(p)) {
3855                 memcpy(buf, p, len);
3856                 return 0;
3857         }
3858         print_overflow_msg(__func__, xdr);
3859         return -EIO;
3860 }
3861
3862 static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
3863 {
3864         return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
3865 }
3866
3867 static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
3868 {
3869         int status;
3870
3871         status = decode_op_hdr(xdr, OP_CLOSE);
3872         if (status != -EIO)
3873                 nfs_increment_open_seqid(status, res->seqid);
3874         if (!status)
3875                 status = decode_stateid(xdr, &res->stateid);
3876         return status;
3877 }
3878
3879 static int decode_verifier(struct xdr_stream *xdr, void *verifier)
3880 {
3881         return decode_opaque_fixed(xdr, verifier, 8);
3882 }
3883
3884 static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res)
3885 {
3886         int status;
3887
3888         status = decode_op_hdr(xdr, OP_COMMIT);
3889         if (!status)
3890                 status = decode_verifier(xdr, res->verf->verifier);
3891         return status;
3892 }
3893
3894 static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
3895 {
3896         __be32 *p;
3897         uint32_t bmlen;
3898         int status;
3899
3900         status = decode_op_hdr(xdr, OP_CREATE);
3901         if (status)
3902                 return status;
3903         if ((status = decode_change_info(xdr, cinfo)))
3904                 return status;
3905         p = xdr_inline_decode(xdr, 4);
3906         if (unlikely(!p))
3907                 goto out_overflow;
3908         bmlen = be32_to_cpup(p);
3909         p = xdr_inline_decode(xdr, bmlen << 2);
3910         if (likely(p))
3911                 return 0;
3912 out_overflow:
3913         print_overflow_msg(__func__, xdr);
3914         return -EIO;
3915 }
3916
3917 static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res)
3918 {
3919         __be32 *savep;
3920         uint32_t attrlen, bitmap[2] = {0};
3921         int status;
3922
3923         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3924                 goto xdr_error;
3925         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3926                 goto xdr_error;
3927         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3928                 goto xdr_error;
3929         if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0)
3930                 goto xdr_error;
3931         if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0)
3932                 goto xdr_error;
3933         if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0)
3934                 goto xdr_error;
3935         if ((status = decode_attr_aclsupport(xdr, bitmap, &res->acl_bitmask)) != 0)
3936                 goto xdr_error;
3937         status = verify_attr_len(xdr, savep, attrlen);
3938 xdr_error:
3939         dprintk("%s: xdr returned %d!\n", __func__, -status);
3940         return status;
3941 }
3942
3943 static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat)
3944 {
3945         __be32 *savep;
3946         uint32_t attrlen, bitmap[2] = {0};
3947         int status;
3948
3949         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3950                 goto xdr_error;
3951         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3952                 goto xdr_error;
3953         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3954                 goto xdr_error;
3955
3956         if ((status = decode_attr_files_avail(xdr, bitmap, &fsstat->afiles)) != 0)
3957                 goto xdr_error;
3958         if ((status = decode_attr_files_free(xdr, bitmap, &fsstat->ffiles)) != 0)
3959                 goto xdr_error;
3960         if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0)
3961                 goto xdr_error;
3962         if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0)
3963                 goto xdr_error;
3964         if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0)
3965                 goto xdr_error;
3966         if ((status = decode_attr_space_total(xdr, bitmap, &fsstat->tbytes)) != 0)
3967                 goto xdr_error;
3968
3969         status = verify_attr_len(xdr, savep, attrlen);
3970 xdr_error:
3971         dprintk("%s: xdr returned %d!\n", __func__, -status);
3972         return status;
3973 }
3974
3975 static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf)
3976 {
3977         __be32 *savep;
3978         uint32_t attrlen, bitmap[2] = {0};
3979         int status;
3980
3981         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
3982                 goto xdr_error;
3983         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
3984                 goto xdr_error;
3985         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
3986                 goto xdr_error;
3987
3988         if ((status = decode_attr_maxlink(xdr, bitmap, &pathconf->max_link)) != 0)
3989                 goto xdr_error;
3990         if ((status = decode_attr_maxname(xdr, bitmap, &pathconf->max_namelen)) != 0)
3991                 goto xdr_error;
3992
3993         status = verify_attr_len(xdr, savep, attrlen);
3994 xdr_error:
3995         dprintk("%s: xdr returned %d!\n", __func__, -status);
3996         return status;
3997 }
3998
3999 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
4000                 struct nfs_fattr *fattr, struct nfs_fh *fh,
4001                 const struct nfs_server *server, int may_sleep)
4002 {
4003         int status;
4004         umode_t fmode = 0;
4005         uint64_t fileid;
4006         uint32_t type;
4007
4008         status = decode_attr_type(xdr, bitmap, &type);
4009         if (status < 0)
4010                 goto xdr_error;
4011         fattr->mode = 0;
4012         if (status != 0) {
4013                 fattr->mode |= nfs_type2fmt[type];
4014                 fattr->valid |= status;
4015         }
4016
4017         status = decode_attr_change(xdr, bitmap, &fattr->change_attr);
4018         if (status < 0)
4019                 goto xdr_error;
4020         fattr->valid |= status;
4021
4022         status = decode_attr_size(xdr, bitmap, &fattr->size);
4023         if (status < 0)
4024                 goto xdr_error;
4025         fattr->valid |= status;
4026
4027         status = decode_attr_fsid(xdr, bitmap, &fattr->fsid);
4028         if (status < 0)
4029                 goto xdr_error;
4030         fattr->valid |= status;
4031
4032         status = decode_attr_error(xdr, bitmap);
4033         if (status == -NFS4ERR_WRONGSEC) {
4034                 nfs_fixup_secinfo_attributes(fattr, fh);
4035                 status = 0;
4036         }
4037         if (status < 0)
4038                 goto xdr_error;
4039
4040         status = decode_attr_filehandle(xdr, bitmap, fh);
4041         if (status < 0)
4042                 goto xdr_error;
4043
4044         status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
4045         if (status < 0)
4046                 goto xdr_error;
4047         fattr->valid |= status;
4048
4049         status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
4050                                                 struct nfs4_fs_locations,
4051                                                 fattr));
4052         if (status < 0)
4053                 goto xdr_error;
4054         fattr->valid |= status;
4055
4056         status = decode_attr_mode(xdr, bitmap, &fmode);
4057         if (status < 0)
4058                 goto xdr_error;
4059         if (status != 0) {
4060                 fattr->mode |= fmode;
4061                 fattr->valid |= status;
4062         }
4063
4064         status = decode_attr_nlink(xdr, bitmap, &fattr->nlink);
4065         if (status < 0)
4066                 goto xdr_error;
4067         fattr->valid |= status;
4068
4069         status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, may_sleep);
4070         if (status < 0)
4071                 goto xdr_error;
4072         fattr->valid |= status;
4073
4074         status = decode_attr_group(xdr, bitmap, server, &fattr->gid, may_sleep);
4075         if (status < 0)
4076                 goto xdr_error;
4077         fattr->valid |= status;
4078
4079         status = decode_attr_rdev(xdr, bitmap, &fattr->rdev);
4080         if (status < 0)
4081                 goto xdr_error;
4082         fattr->valid |= status;
4083
4084         status = decode_attr_space_used(xdr, bitmap, &fattr->du.nfs3.used);
4085         if (status < 0)
4086                 goto xdr_error;
4087         fattr->valid |= status;
4088
4089         status = decode_attr_time_access(xdr, bitmap, &fattr->atime);
4090         if (status < 0)
4091                 goto xdr_error;
4092         fattr->valid |= status;
4093
4094         status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
4095         if (status < 0)
4096                 goto xdr_error;
4097         fattr->valid |= status;
4098
4099         status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime);
4100         if (status < 0)
4101                 goto xdr_error;
4102         fattr->valid |= status;
4103
4104         status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid);
4105         if (status < 0)
4106                 goto xdr_error;
4107         if (status != 0 && !(fattr->valid & status)) {
4108                 fattr->fileid = fileid;
4109                 fattr->valid |= status;
4110         }
4111
4112 xdr_error:
4113         dprintk("%s: xdr returned %d\n", __func__, -status);
4114         return status;
4115 }
4116
4117 static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4118                 struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
4119 {
4120         __be32 *savep;
4121         uint32_t attrlen,
4122                  bitmap[2] = {0};
4123         int status;
4124
4125         status = decode_op_hdr(xdr, OP_GETATTR);
4126         if (status < 0)
4127                 goto xdr_error;
4128
4129         status = decode_attr_bitmap(xdr, bitmap);
4130         if (status < 0)
4131                 goto xdr_error;
4132
4133         status = decode_attr_length(xdr, &attrlen, &savep);
4134         if (status < 0)
4135                 goto xdr_error;
4136
4137         status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
4138         if (status < 0)
4139                 goto xdr_error;
4140
4141         status = verify_attr_len(xdr, savep, attrlen);
4142 xdr_error:
4143         dprintk("%s: xdr returned %d\n", __func__, -status);
4144         return status;
4145 }
4146
4147 static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
4148                 const struct nfs_server *server, int may_sleep)
4149 {
4150         return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
4151 }
4152
4153 /*
4154  * Decode potentially multiple layout types. Currently we only support
4155  * one layout driver per file system.
4156  */
4157 static int decode_first_pnfs_layout_type(struct xdr_stream *xdr,
4158                                          uint32_t *layouttype)
4159 {
4160         uint32_t *p;
4161         int num;
4162
4163         p = xdr_inline_decode(xdr, 4);
4164         if (unlikely(!p))
4165                 goto out_overflow;
4166         num = be32_to_cpup(p);
4167
4168         /* pNFS is not supported by the underlying file system */
4169         if (num == 0) {
4170                 *layouttype = 0;
4171                 return 0;
4172         }
4173         if (num > 1)
4174                 printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers "
4175                         "per filesystem not supported\n", __func__);
4176
4177         /* Decode and set first layout type, move xdr->p past unused types */
4178         p = xdr_inline_decode(xdr, num * 4);
4179         if (unlikely(!p))
4180                 goto out_overflow;
4181         *layouttype = be32_to_cpup(p);
4182         return 0;
4183 out_overflow:
4184         print_overflow_msg(__func__, xdr);
4185         return -EIO;
4186 }
4187
4188 /*
4189  * The type of file system exported.
4190  * Note we must ensure that layouttype is set in any non-error case.
4191  */
4192 static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap,
4193                                 uint32_t *layouttype)
4194 {
4195         int status = 0;
4196
4197         dprintk("%s: bitmap is %x\n", __func__, bitmap[1]);
4198         if (unlikely(bitmap[1] & (FATTR4_WORD1_FS_LAYOUT_TYPES - 1U)))
4199                 return -EIO;
4200         if (bitmap[1] & FATTR4_WORD1_FS_LAYOUT_TYPES) {
4201                 status = decode_first_pnfs_layout_type(xdr, layouttype);
4202                 bitmap[1] &= ~FATTR4_WORD1_FS_LAYOUT_TYPES;
4203         } else
4204                 *layouttype = 0;
4205         return status;
4206 }
4207
4208 static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
4209 {
4210         __be32 *savep;
4211         uint32_t attrlen, bitmap[2];
4212         int status;
4213
4214         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4215                 goto xdr_error;
4216         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4217                 goto xdr_error;
4218         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4219                 goto xdr_error;
4220
4221         fsinfo->rtmult = fsinfo->wtmult = 512;  /* ??? */
4222
4223         if ((status = decode_attr_lease_time(xdr, bitmap, &fsinfo->lease_time)) != 0)
4224                 goto xdr_error;
4225         if ((status = decode_attr_maxfilesize(xdr, bitmap, &fsinfo->maxfilesize)) != 0)
4226                 goto xdr_error;
4227         if ((status = decode_attr_maxread(xdr, bitmap, &fsinfo->rtmax)) != 0)
4228                 goto xdr_error;
4229         fsinfo->rtpref = fsinfo->dtpref = fsinfo->rtmax;
4230         if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
4231                 goto xdr_error;
4232         fsinfo->wtpref = fsinfo->wtmax;
4233         status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
4234         if (status != 0)
4235                 goto xdr_error;
4236         status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype);
4237         if (status != 0)
4238                 goto xdr_error;
4239
4240         status = verify_attr_len(xdr, savep, attrlen);
4241 xdr_error:
4242         dprintk("%s: xdr returned %d!\n", __func__, -status);
4243         return status;
4244 }
4245
4246 static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
4247 {
4248         __be32 *p;
4249         uint32_t len;
4250         int status;
4251
4252         /* Zero handle first to allow comparisons */
4253         memset(fh, 0, sizeof(*fh));
4254
4255         status = decode_op_hdr(xdr, OP_GETFH);
4256         if (status)
4257                 return status;
4258
4259         p = xdr_inline_decode(xdr, 4);
4260         if (unlikely(!p))
4261                 goto out_overflow;
4262         len = be32_to_cpup(p);
4263         if (len > NFS4_FHSIZE)
4264                 return -EIO;
4265         fh->size = len;
4266         p = xdr_inline_decode(xdr, len);
4267         if (unlikely(!p))
4268                 goto out_overflow;
4269         memcpy(fh->data, p, len);
4270         return 0;
4271 out_overflow:
4272         print_overflow_msg(__func__, xdr);
4273         return -EIO;
4274 }
4275
4276 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4277 {
4278         int status;
4279
4280         status = decode_op_hdr(xdr, OP_LINK);
4281         if (status)
4282                 return status;
4283         return decode_change_info(xdr, cinfo);
4284 }
4285
4286 /*
4287  * We create the owner, so we know a proper owner.id length is 4.
4288  */
4289 static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
4290 {
4291         uint64_t offset, length, clientid;
4292         __be32 *p;
4293         uint32_t namelen, type;
4294
4295         p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
4296         if (unlikely(!p))
4297                 goto out_overflow;
4298         p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
4299         p = xdr_decode_hyper(p, &length);
4300         type = be32_to_cpup(p++); /* 4 byte read */
4301         if (fl != NULL) { /* manipulate file lock */
4302                 fl->fl_start = (loff_t)offset;
4303                 fl->fl_end = fl->fl_start + (loff_t)length - 1;
4304                 if (length == ~(uint64_t)0)
4305                         fl->fl_end = OFFSET_MAX;
4306                 fl->fl_type = F_WRLCK;
4307                 if (type & 1)
4308                         fl->fl_type = F_RDLCK;
4309                 fl->fl_pid = 0;
4310         }
4311         p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
4312         namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
4313         p = xdr_inline_decode(xdr, namelen); /* variable size field */
4314         if (likely(p))
4315                 return -NFS4ERR_DENIED;
4316 out_overflow:
4317         print_overflow_msg(__func__, xdr);
4318         return -EIO;
4319 }
4320
4321 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
4322 {
4323         int status;
4324
4325         status = decode_op_hdr(xdr, OP_LOCK);
4326         if (status == -EIO)
4327                 goto out;
4328         if (status == 0) {
4329                 status = decode_stateid(xdr, &res->stateid);
4330                 if (unlikely(status))
4331                         goto out;
4332         } else if (status == -NFS4ERR_DENIED)
4333                 status = decode_lock_denied(xdr, NULL);
4334         if (res->open_seqid != NULL)
4335                 nfs_increment_open_seqid(status, res->open_seqid);
4336         nfs_increment_lock_seqid(status, res->lock_seqid);
4337 out:
4338         return status;
4339 }
4340
4341 static int decode_lockt(struct xdr_stream *xdr, struct nfs_lockt_res *res)
4342 {
4343         int status;
4344         status = decode_op_hdr(xdr, OP_LOCKT);
4345         if (status == -NFS4ERR_DENIED)
4346                 return decode_lock_denied(xdr, res->denied);
4347         return status;
4348 }
4349
4350 static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
4351 {
4352         int status;
4353
4354         status = decode_op_hdr(xdr, OP_LOCKU);
4355         if (status != -EIO)
4356                 nfs_increment_lock_seqid(status, res->seqid);
4357         if (status == 0)
4358                 status = decode_stateid(xdr, &res->stateid);
4359         return status;
4360 }
4361
4362 static int decode_release_lockowner(struct xdr_stream *xdr)
4363 {
4364         return decode_op_hdr(xdr, OP_RELEASE_LOCKOWNER);
4365 }
4366
4367 static int decode_lookup(struct xdr_stream *xdr)
4368 {
4369         return decode_op_hdr(xdr, OP_LOOKUP);
4370 }
4371
4372 /* This is too sick! */
4373 static int decode_space_limit(struct xdr_stream *xdr, u64 *maxsize)
4374 {
4375         __be32 *p;
4376         uint32_t limit_type, nblocks, blocksize;
4377
4378         p = xdr_inline_decode(xdr, 12);
4379         if (unlikely(!p))
4380                 goto out_overflow;
4381         limit_type = be32_to_cpup(p++);
4382         switch (limit_type) {
4383         case 1:
4384                 xdr_decode_hyper(p, maxsize);
4385                 break;
4386         case 2:
4387                 nblocks = be32_to_cpup(p++);
4388                 blocksize = be32_to_cpup(p);
4389                 *maxsize = (uint64_t)nblocks * (uint64_t)blocksize;
4390         }
4391         return 0;
4392 out_overflow:
4393         print_overflow_msg(__func__, xdr);
4394         return -EIO;
4395 }
4396
4397 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
4398 {
4399         __be32 *p;
4400         uint32_t delegation_type;
4401         int status;
4402
4403         p = xdr_inline_decode(xdr, 4);
4404         if (unlikely(!p))
4405                 goto out_overflow;
4406         delegation_type = be32_to_cpup(p);
4407         if (delegation_type == NFS4_OPEN_DELEGATE_NONE) {
4408                 res->delegation_type = 0;
4409                 return 0;
4410         }
4411         status = decode_stateid(xdr, &res->delegation);
4412         if (unlikely(status))
4413                 return status;
4414         p = xdr_inline_decode(xdr, 4);
4415         if (unlikely(!p))
4416                 goto out_overflow;
4417         res->do_recall = be32_to_cpup(p);
4418
4419         switch (delegation_type) {
4420         case NFS4_OPEN_DELEGATE_READ:
4421                 res->delegation_type = FMODE_READ;
4422                 break;
4423         case NFS4_OPEN_DELEGATE_WRITE:
4424                 res->delegation_type = FMODE_WRITE|FMODE_READ;
4425                 if (decode_space_limit(xdr, &res->maxsize) < 0)
4426                                 return -EIO;
4427         }
4428         return decode_ace(xdr, NULL, res->server->nfs_client);
4429 out_overflow:
4430         print_overflow_msg(__func__, xdr);
4431         return -EIO;
4432 }
4433
4434 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
4435 {
4436         __be32 *p;
4437         uint32_t savewords, bmlen, i;
4438         int status;
4439
4440         status = decode_op_hdr(xdr, OP_OPEN);
4441         if (status != -EIO)
4442                 nfs_increment_open_seqid(status, res->seqid);
4443         if (!status)
4444                 status = decode_stateid(xdr, &res->stateid);
4445         if (unlikely(status))
4446                 return status;
4447
4448         decode_change_info(xdr, &res->cinfo);
4449
4450         p = xdr_inline_decode(xdr, 8);
4451         if (unlikely(!p))
4452                 goto out_overflow;
4453         res->rflags = be32_to_cpup(p++);
4454         bmlen = be32_to_cpup(p);
4455         if (bmlen > 10)
4456                 goto xdr_error;
4457
4458         p = xdr_inline_decode(xdr, bmlen << 2);
4459         if (unlikely(!p))
4460                 goto out_overflow;
4461         savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
4462         for (i = 0; i < savewords; ++i)
4463                 res->attrset[i] = be32_to_cpup(p++);
4464         for (; i < NFS4_BITMAP_SIZE; i++)
4465                 res->attrset[i] = 0;
4466
4467         return decode_delegation(xdr, res);
4468 xdr_error:
4469         dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
4470         return -EIO;
4471 out_overflow:
4472         print_overflow_msg(__func__, xdr);
4473         return -EIO;
4474 }
4475
4476 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
4477 {
4478         int status;
4479
4480         status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
4481         if (status != -EIO)
4482                 nfs_increment_open_seqid(status, res->seqid);
4483         if (!status)
4484                 status = decode_stateid(xdr, &res->stateid);
4485         return status;
4486 }
4487
4488 static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *res)
4489 {
4490         int status;
4491
4492         status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
4493         if (status != -EIO)
4494                 nfs_increment_open_seqid(status, res->seqid);
4495         if (!status)
4496                 status = decode_stateid(xdr, &res->stateid);
4497         return status;
4498 }
4499
4500 static int decode_putfh(struct xdr_stream *xdr)
4501 {
4502         return decode_op_hdr(xdr, OP_PUTFH);
4503 }
4504
4505 static int decode_putrootfh(struct xdr_stream *xdr)
4506 {
4507         return decode_op_hdr(xdr, OP_PUTROOTFH);
4508 }
4509
4510 static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res)
4511 {
4512         struct kvec *iov = req->rq_rcv_buf.head;
4513         __be32 *p;
4514         uint32_t count, eof, recvd, hdrlen;
4515         int status;
4516
4517         status = decode_op_hdr(xdr, OP_READ);
4518         if (status)
4519                 return status;
4520         p = xdr_inline_decode(xdr, 8);
4521         if (unlikely(!p))
4522                 goto out_overflow;
4523         eof = be32_to_cpup(p++);
4524         count = be32_to_cpup(p);
4525         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
4526         recvd = req->rq_rcv_buf.len - hdrlen;
4527         if (count > recvd) {
4528                 dprintk("NFS: server cheating in read reply: "
4529                                 "count %u > recvd %u\n", count, recvd);
4530                 count = recvd;
4531                 eof = 0;
4532         }
4533         xdr_read_pages(xdr, count);
4534         res->eof = eof;
4535         res->count = count;
4536         return 0;
4537 out_overflow:
4538         print_overflow_msg(__func__, xdr);
4539         return -EIO;
4540 }
4541
4542 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
4543 {
4544         struct xdr_buf  *rcvbuf = &req->rq_rcv_buf;
4545         struct kvec     *iov = rcvbuf->head;
4546         size_t          hdrlen;
4547         u32             recvd, pglen = rcvbuf->page_len;
4548         int             status;
4549
4550         status = decode_op_hdr(xdr, OP_READDIR);
4551         if (!status)
4552                 status = decode_verifier(xdr, readdir->verifier.data);
4553         if (unlikely(status))
4554                 return status;
4555         dprintk("%s: verifier = %08x:%08x\n",
4556                         __func__,
4557                         ((u32 *)readdir->verifier.data)[0],
4558                         ((u32 *)readdir->verifier.data)[1]);
4559
4560
4561         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4562         recvd = rcvbuf->len - hdrlen;
4563         if (pglen > recvd)
4564                 pglen = recvd;
4565         xdr_read_pages(xdr, pglen);
4566
4567
4568         return pglen;
4569 }
4570
4571 static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
4572 {
4573         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
4574         struct kvec *iov = rcvbuf->head;
4575         size_t hdrlen;
4576         u32 len, recvd;
4577         __be32 *p;
4578         int status;
4579
4580         status = decode_op_hdr(xdr, OP_READLINK);
4581         if (status)
4582                 return status;
4583
4584         /* Convert length of symlink */
4585         p = xdr_inline_decode(xdr, 4);
4586         if (unlikely(!p))
4587                 goto out_overflow;
4588         len = be32_to_cpup(p);
4589         if (len >= rcvbuf->page_len || len <= 0) {
4590                 dprintk("nfs: server returned giant symlink!\n");
4591                 return -ENAMETOOLONG;
4592         }
4593         hdrlen = (char *) xdr->p - (char *) iov->iov_base;
4594         recvd = req->rq_rcv_buf.len - hdrlen;
4595         if (recvd < len) {
4596                 dprintk("NFS: server cheating in readlink reply: "
4597                                 "count %u > recvd %u\n", len, recvd);
4598                 return -EIO;
4599         }
4600         xdr_read_pages(xdr, len);
4601         /*
4602          * The XDR encode routine has set things up so that
4603          * the link text will be copied directly into the
4604          * buffer.  We just have to do overflow-checking,
4605          * and and null-terminate the text (the VFS expects
4606          * null-termination).
4607          */
4608         xdr_terminate_string(rcvbuf, len);
4609         return 0;
4610 out_overflow:
4611         print_overflow_msg(__func__, xdr);
4612         return -EIO;
4613 }
4614
4615 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
4616 {
4617         int status;
4618
4619         status = decode_op_hdr(xdr, OP_REMOVE);
4620         if (status)
4621                 goto out;
4622         status = decode_change_info(xdr, cinfo);
4623 out:
4624         return status;
4625 }
4626
4627 static int decode_rename(struct xdr_stream *xdr, struct nfs4_change_info *old_cinfo,
4628               struct nfs4_change_info *new_cinfo)
4629 {
4630         int status;
4631
4632         status = decode_op_hdr(xdr, OP_RENAME);
4633         if (status)
4634                 goto out;
4635         if ((status = decode_change_info(xdr, old_cinfo)))
4636                 goto out;
4637         status = decode_change_info(xdr, new_cinfo);
4638 out:
4639         return status;
4640 }
4641
4642 static int decode_renew(struct xdr_stream *xdr)
4643 {
4644         return decode_op_hdr(xdr, OP_RENEW);
4645 }
4646
4647 static int
4648 decode_restorefh(struct xdr_stream *xdr)
4649 {
4650         return decode_op_hdr(xdr, OP_RESTOREFH);
4651 }
4652
4653 static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
4654                 size_t *acl_len)
4655 {
4656         __be32 *savep;
4657         uint32_t attrlen,
4658                  bitmap[2] = {0};
4659         struct kvec *iov = req->rq_rcv_buf.head;
4660         int status;
4661
4662         *acl_len = 0;
4663         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
4664                 goto out;
4665         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
4666                 goto out;
4667         if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0)
4668                 goto out;
4669
4670         if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U)))
4671                 return -EIO;
4672         if (likely(bitmap[0] & FATTR4_WORD0_ACL)) {
4673                 size_t hdrlen;
4674                 u32 recvd;
4675
4676                 /* We ignore &savep and don't do consistency checks on
4677                  * the attr length.  Let userspace figure it out.... */
4678                 hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base;
4679                 recvd = req->rq_rcv_buf.len - hdrlen;
4680                 if (attrlen > recvd) {
4681                         dprintk("NFS: server cheating in getattr"
4682                                         " acl reply: attrlen %u > recvd %u\n",
4683                                         attrlen, recvd);
4684                         return -EINVAL;
4685                 }
4686                 xdr_read_pages(xdr, attrlen);
4687                 *acl_len = attrlen;
4688         } else
4689                 status = -EOPNOTSUPP;
4690
4691 out:
4692         return status;
4693 }
4694
4695 static int
4696 decode_savefh(struct xdr_stream *xdr)
4697 {
4698         return decode_op_hdr(xdr, OP_SAVEFH);
4699 }
4700
4701 static int decode_setattr(struct xdr_stream *xdr)
4702 {
4703         __be32 *p;
4704         uint32_t bmlen;
4705         int status;
4706
4707         status = decode_op_hdr(xdr, OP_SETATTR);
4708         if (status)
4709                 return status;
4710         p = xdr_inline_decode(xdr, 4);
4711         if (unlikely(!p))
4712                 goto out_overflow;
4713         bmlen = be32_to_cpup(p);
4714         p = xdr_inline_decode(xdr, bmlen << 2);
4715         if (likely(p))
4716                 return 0;
4717 out_overflow:
4718         print_overflow_msg(__func__, xdr);
4719         return -EIO;
4720 }
4721
4722 static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_res *res)
4723 {
4724         __be32 *p;
4725         uint32_t opnum;
4726         int32_t nfserr;
4727
4728         p = xdr_inline_decode(xdr, 8);
4729         if (unlikely(!p))
4730                 goto out_overflow;
4731         opnum = be32_to_cpup(p++);
4732         if (opnum != OP_SETCLIENTID) {
4733                 dprintk("nfs: decode_setclientid: Server returned operation"
4734                         " %d\n", opnum);
4735                 return -EIO;
4736         }
4737         nfserr = be32_to_cpup(p);
4738         if (nfserr == NFS_OK) {
4739                 p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
4740                 if (unlikely(!p))
4741                         goto out_overflow;
4742                 p = xdr_decode_hyper(p, &res->clientid);
4743                 memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
4744         } else if (nfserr == NFSERR_CLID_INUSE) {
4745                 uint32_t len;
4746
4747                 /* skip netid string */
4748                 p = xdr_inline_decode(xdr, 4);
4749                 if (unlikely(!p))
4750                         goto out_overflow;
4751                 len = be32_to_cpup(p);
4752                 p = xdr_inline_decode(xdr, len);
4753                 if (unlikely(!p))
4754                         goto out_overflow;
4755
4756                 /* skip uaddr string */
4757                 p = xdr_inline_decode(xdr, 4);
4758                 if (unlikely(!p))
4759                         goto out_overflow;
4760                 len = be32_to_cpup(p);
4761                 p = xdr_inline_decode(xdr, len);
4762                 if (unlikely(!p))
4763                         goto out_overflow;
4764                 return -NFSERR_CLID_INUSE;
4765         } else
4766                 return nfs4_stat_to_errno(nfserr);
4767
4768         return 0;
4769 out_overflow:
4770         print_overflow_msg(__func__, xdr);
4771         return -EIO;
4772 }
4773
4774 static int decode_setclientid_confirm(struct xdr_stream *xdr)
4775 {
4776         return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM);
4777 }
4778
4779 static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res)
4780 {
4781         __be32 *p;
4782         int status;
4783
4784         status = decode_op_hdr(xdr, OP_WRITE);
4785         if (status)
4786                 return status;
4787
4788         p = xdr_inline_decode(xdr, 16);
4789         if (unlikely(!p))
4790                 goto out_overflow;
4791         res->count = be32_to_cpup(p++);
4792         res->verf->committed = be32_to_cpup(p++);
4793         memcpy(res->verf->verifier, p, 8);
4794         return 0;
4795 out_overflow:
4796         print_overflow_msg(__func__, xdr);
4797         return -EIO;
4798 }
4799
4800 static int decode_delegreturn(struct xdr_stream *xdr)
4801 {
4802         return decode_op_hdr(xdr, OP_DELEGRETURN);
4803 }
4804
4805 static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
4806 {
4807         __be32 *p;
4808
4809         p = xdr_inline_decode(xdr, 4);
4810         if (unlikely(!p))
4811                 goto out_overflow;
4812         flavor->gss.sec_oid4.len = be32_to_cpup(p);
4813         if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
4814                 goto out_err;
4815
4816         p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
4817         if (unlikely(!p))
4818                 goto out_overflow;
4819         memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
4820
4821         p = xdr_inline_decode(xdr, 8);
4822         if (unlikely(!p))
4823                 goto out_overflow;
4824         flavor->gss.qop4 = be32_to_cpup(p++);
4825         flavor->gss.service = be32_to_cpup(p);
4826
4827         return 0;
4828
4829 out_overflow:
4830         print_overflow_msg(__func__, xdr);
4831         return -EIO;
4832 out_err:
4833         return -EINVAL;
4834 }
4835
4836 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
4837 {
4838         struct nfs4_secinfo_flavor *sec_flavor;
4839         int status;
4840         __be32 *p;
4841         int i;
4842
4843         status = decode_op_hdr(xdr, OP_SECINFO);
4844         p = xdr_inline_decode(xdr, 4);
4845         if (unlikely(!p))
4846                 goto out_overflow;
4847         res->flavors->num_flavors = be32_to_cpup(p);
4848
4849         for (i = 0; i < res->flavors->num_flavors; i++) {
4850                 sec_flavor = &res->flavors->flavors[i];
4851                 if ((char *)&sec_flavor[1] - (char *)res > PAGE_SIZE)
4852                         break;
4853
4854                 p = xdr_inline_decode(xdr, 4);
4855                 if (unlikely(!p))
4856                         goto out_overflow;
4857                 sec_flavor->flavor = be32_to_cpup(p);
4858
4859                 if (sec_flavor->flavor == RPC_AUTH_GSS) {
4860                         if (decode_secinfo_gss(xdr, sec_flavor))
4861                                 break;
4862                 }
4863         }
4864
4865         return 0;
4866
4867 out_overflow:
4868         print_overflow_msg(__func__, xdr);
4869         return -EIO;
4870 }
4871
4872 #if defined(CONFIG_NFS_V4_1)
4873 static int decode_exchange_id(struct xdr_stream *xdr,
4874                               struct nfs41_exchange_id_res *res)
4875 {
4876         __be32 *p;
4877         uint32_t dummy;
4878         char *dummy_str;
4879         int status;
4880         struct nfs_client *clp = res->client;
4881
4882         status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
4883         if (status)
4884                 return status;
4885
4886         p = xdr_inline_decode(xdr, 8);
4887         if (unlikely(!p))
4888                 goto out_overflow;
4889         xdr_decode_hyper(p, &clp->cl_clientid);
4890         p = xdr_inline_decode(xdr, 12);
4891         if (unlikely(!p))
4892                 goto out_overflow;
4893         clp->cl_seqid = be32_to_cpup(p++);
4894         clp->cl_exchange_flags = be32_to_cpup(p++);
4895
4896         /* We ask for SP4_NONE */
4897         dummy = be32_to_cpup(p);
4898         if (dummy != SP4_NONE)
4899                 return -EIO;
4900
4901         /* Throw away minor_id */
4902         p = xdr_inline_decode(xdr, 8);
4903         if (unlikely(!p))
4904                 goto out_overflow;
4905
4906         /* Throw away Major id */
4907         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4908         if (unlikely(status))
4909                 return status;
4910
4911         /* Throw away server_scope */
4912         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4913         if (unlikely(status))
4914                 return status;
4915
4916         /* Throw away Implementation id array */
4917         status = decode_opaque_inline(xdr, &dummy, &dummy_str);
4918         if (unlikely(status))
4919                 return status;
4920
4921         return 0;
4922 out_overflow:
4923         print_overflow_msg(__func__, xdr);
4924         return -EIO;
4925 }
4926
4927 static int decode_chan_attrs(struct xdr_stream *xdr,
4928                              struct nfs4_channel_attrs *attrs)
4929 {
4930         __be32 *p;
4931         u32 nr_attrs;
4932
4933         p = xdr_inline_decode(xdr, 28);
4934         if (unlikely(!p))
4935                 goto out_overflow;
4936         attrs->headerpadsz = be32_to_cpup(p++);
4937         attrs->max_rqst_sz = be32_to_cpup(p++);
4938         attrs->max_resp_sz = be32_to_cpup(p++);
4939         attrs->max_resp_sz_cached = be32_to_cpup(p++);
4940         attrs->max_ops = be32_to_cpup(p++);
4941         attrs->max_reqs = be32_to_cpup(p++);
4942         nr_attrs = be32_to_cpup(p);
4943         if (unlikely(nr_attrs > 1)) {
4944                 printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n",
4945                         __func__, nr_attrs);
4946                 return -EINVAL;
4947         }
4948         if (nr_attrs == 1) {
4949                 p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
4950                 if (unlikely(!p))
4951                         goto out_overflow;
4952         }
4953         return 0;
4954 out_overflow:
4955         print_overflow_msg(__func__, xdr);
4956         return -EIO;
4957 }
4958
4959 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
4960 {
4961         return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN);
4962 }
4963
4964 static int decode_create_session(struct xdr_stream *xdr,
4965                                  struct nfs41_create_session_res *res)
4966 {
4967         __be32 *p;
4968         int status;
4969         struct nfs_client *clp = res->client;
4970         struct nfs4_session *session = clp->cl_session;
4971
4972         status = decode_op_hdr(xdr, OP_CREATE_SESSION);
4973         if (!status)
4974                 status = decode_sessionid(xdr, &session->sess_id);
4975         if (unlikely(status))
4976                 return status;
4977
4978         /* seqid, flags */
4979         p = xdr_inline_decode(xdr, 8);
4980         if (unlikely(!p))
4981                 goto out_overflow;
4982         clp->cl_seqid = be32_to_cpup(p++);
4983         session->flags = be32_to_cpup(p);
4984
4985         /* Channel attributes */
4986         status = decode_chan_attrs(xdr, &session->fc_attrs);
4987         if (!status)
4988                 status = decode_chan_attrs(xdr, &session->bc_attrs);
4989         return status;
4990 out_overflow:
4991         print_overflow_msg(__func__, xdr);
4992         return -EIO;
4993 }
4994
4995 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
4996 {
4997         return decode_op_hdr(xdr, OP_DESTROY_SESSION);
4998 }
4999
5000 static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy)
5001 {
5002         return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE);
5003 }
5004 #endif /* CONFIG_NFS_V4_1 */
5005
5006 static int decode_sequence(struct xdr_stream *xdr,
5007                            struct nfs4_sequence_res *res,
5008                            struct rpc_rqst *rqstp)
5009 {
5010 #if defined(CONFIG_NFS_V4_1)
5011         struct nfs4_sessionid id;
5012         u32 dummy;
5013         int status;
5014         __be32 *p;
5015
5016         if (!res->sr_session)
5017                 return 0;
5018
5019         status = decode_op_hdr(xdr, OP_SEQUENCE);
5020         if (!status)
5021                 status = decode_sessionid(xdr, &id);
5022         if (unlikely(status))
5023                 goto out_err;
5024
5025         /*
5026          * If the server returns different values for sessionID, slotID or
5027          * sequence number, the server is looney tunes.
5028          */
5029         status = -EREMOTEIO;
5030
5031         if (memcmp(id.data, res->sr_session->sess_id.data,
5032                    NFS4_MAX_SESSIONID_LEN)) {
5033                 dprintk("%s Invalid session id\n", __func__);
5034                 goto out_err;
5035         }
5036
5037         p = xdr_inline_decode(xdr, 20);
5038         if (unlikely(!p))
5039                 goto out_overflow;
5040
5041         /* seqid */
5042         dummy = be32_to_cpup(p++);
5043         if (dummy != res->sr_slot->seq_nr) {
5044                 dprintk("%s Invalid sequence number\n", __func__);
5045                 goto out_err;
5046         }
5047         /* slot id */
5048         dummy = be32_to_cpup(p++);
5049         if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
5050                 dprintk("%s Invalid slot id\n", __func__);
5051                 goto out_err;
5052         }
5053         /* highest slot id - currently not processed */
5054         dummy = be32_to_cpup(p++);
5055         /* target highest slot id - currently not processed */
5056         dummy = be32_to_cpup(p++);
5057         /* result flags */
5058         res->sr_status_flags = be32_to_cpup(p);
5059         status = 0;
5060 out_err:
5061         res->sr_status = status;
5062         return status;
5063 out_overflow:
5064         print_overflow_msg(__func__, xdr);
5065         status = -EIO;
5066         goto out_err;
5067 #else  /* CONFIG_NFS_V4_1 */
5068         return 0;
5069 #endif /* CONFIG_NFS_V4_1 */
5070 }
5071
5072 #if defined(CONFIG_NFS_V4_1)
5073
5074 static int decode_getdeviceinfo(struct xdr_stream *xdr,
5075                                 struct pnfs_device *pdev)
5076 {
5077         __be32 *p;
5078         uint32_t len, type;
5079         int status;
5080
5081         status = decode_op_hdr(xdr, OP_GETDEVICEINFO);
5082         if (status) {
5083                 if (status == -ETOOSMALL) {
5084                         p = xdr_inline_decode(xdr, 4);
5085                         if (unlikely(!p))
5086                                 goto out_overflow;
5087                         pdev->mincount = be32_to_cpup(p);
5088                         dprintk("%s: Min count too small. mincnt = %u\n",
5089                                 __func__, pdev->mincount);
5090                 }
5091                 return status;
5092         }
5093
5094         p = xdr_inline_decode(xdr, 8);
5095         if (unlikely(!p))
5096                 goto out_overflow;
5097         type = be32_to_cpup(p++);
5098         if (type != pdev->layout_type) {
5099                 dprintk("%s: layout mismatch req: %u pdev: %u\n",
5100                         __func__, pdev->layout_type, type);
5101                 return -EINVAL;
5102         }
5103         /*
5104          * Get the length of the opaque device_addr4. xdr_read_pages places
5105          * the opaque device_addr4 in the xdr_buf->pages (pnfs_device->pages)
5106          * and places the remaining xdr data in xdr_buf->tail
5107          */
5108         pdev->mincount = be32_to_cpup(p);
5109         xdr_read_pages(xdr, pdev->mincount); /* include space for the length */
5110
5111         /* Parse notification bitmap, verifying that it is zero. */
5112         p = xdr_inline_decode(xdr, 4);
5113         if (unlikely(!p))
5114                 goto out_overflow;
5115         len = be32_to_cpup(p);
5116         if (len) {
5117                 uint32_t i;
5118
5119                 p = xdr_inline_decode(xdr, 4 * len);
5120                 if (unlikely(!p))
5121                         goto out_overflow;
5122                 for (i = 0; i < len; i++, p++) {
5123                         if (be32_to_cpup(p)) {
5124                                 dprintk("%s: notifications not supported\n",
5125                                         __func__);
5126                                 return -EIO;
5127                         }
5128                 }
5129         }
5130         return 0;
5131 out_overflow:
5132         print_overflow_msg(__func__, xdr);
5133         return -EIO;
5134 }
5135
5136 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
5137                             struct nfs4_layoutget_res *res)
5138 {
5139         __be32 *p;
5140         int status;
5141         u32 layout_count;
5142         struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
5143         struct kvec *iov = rcvbuf->head;
5144         u32 hdrlen, recvd;
5145
5146         status = decode_op_hdr(xdr, OP_LAYOUTGET);
5147         if (status)
5148                 return status;
5149         p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE);
5150         if (unlikely(!p))
5151                 goto out_overflow;
5152         res->return_on_close = be32_to_cpup(p++);
5153         p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE);
5154         layout_count = be32_to_cpup(p);
5155         if (!layout_count) {
5156                 dprintk("%s: server responded with empty layout array\n",
5157                         __func__);
5158                 return -EINVAL;
5159         }
5160
5161         p = xdr_inline_decode(xdr, 28);
5162         if (unlikely(!p))
5163                 goto out_overflow;
5164         p = xdr_decode_hyper(p, &res->range.offset);
5165         p = xdr_decode_hyper(p, &res->range.length);
5166         res->range.iomode = be32_to_cpup(p++);
5167         res->type = be32_to_cpup(p++);
5168         res->layoutp->len = be32_to_cpup(p);
5169
5170         dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n",
5171                 __func__,
5172                 (unsigned long)res->range.offset,
5173                 (unsigned long)res->range.length,
5174                 res->range.iomode,
5175                 res->type,
5176                 res->layoutp->len);
5177
5178         hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base;
5179         recvd = req->rq_rcv_buf.len - hdrlen;
5180         if (res->layoutp->len > recvd) {
5181                 dprintk("NFS: server cheating in layoutget reply: "
5182                                 "layout len %u > recvd %u\n",
5183                                 res->layoutp->len, recvd);
5184                 return -EINVAL;
5185         }
5186
5187         xdr_read_pages(xdr, res->layoutp->len);
5188
5189         if (layout_count > 1) {
5190                 /* We only handle a length one array at the moment.  Any
5191                  * further entries are just ignored.  Note that this means
5192                  * the client may see a response that is less than the
5193                  * minimum it requested.
5194                  */
5195                 dprintk("%s: server responded with %d layouts, dropping tail\n",
5196                         __func__, layout_count);
5197         }
5198
5199         return 0;
5200 out_overflow:
5201         print_overflow_msg(__func__, xdr);
5202         return -EIO;
5203 }
5204
5205 static int decode_layoutcommit(struct xdr_stream *xdr,
5206                                struct rpc_rqst *req,
5207                                struct nfs4_layoutcommit_res *res)
5208 {
5209         __be32 *p;
5210         __u32 sizechanged;
5211         int status;
5212
5213         status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
5214         if (status)
5215                 return status;
5216
5217         p = xdr_inline_decode(xdr, 4);
5218         if (unlikely(!p))
5219                 goto out_overflow;
5220         sizechanged = be32_to_cpup(p);
5221
5222         if (sizechanged) {
5223                 /* throw away new size */
5224                 p = xdr_inline_decode(xdr, 8);
5225                 if (unlikely(!p))
5226                         goto out_overflow;
5227         }
5228         return 0;
5229 out_overflow:
5230         print_overflow_msg(__func__, xdr);
5231         return -EIO;
5232 }
5233 #endif /* CONFIG_NFS_V4_1 */
5234
5235 /*
5236  * END OF "GENERIC" DECODE ROUTINES.
5237  */
5238
5239 /*
5240  * Decode OPEN_DOWNGRADE response
5241  */
5242 static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
5243                                        struct xdr_stream *xdr,
5244                                        struct nfs_closeres *res)
5245 {
5246         struct compound_hdr hdr;
5247         int status;
5248
5249         status = decode_compound_hdr(xdr, &hdr);
5250         if (status)
5251                 goto out;
5252         status = decode_sequence(xdr, &res->seq_res, rqstp);
5253         if (status)
5254                 goto out;
5255         status = decode_putfh(xdr);
5256         if (status)
5257                 goto out;
5258         status = decode_open_downgrade(xdr, res);
5259         if (status != 0)
5260                 goto out;
5261         decode_getfattr(xdr, res->fattr, res->server,
5262                         !RPC_IS_ASYNC(rqstp->rq_task));
5263 out:
5264         return status;
5265 }
5266
5267 /*
5268  * Decode ACCESS response
5269  */
5270 static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5271                                struct nfs4_accessres *res)
5272 {
5273         struct compound_hdr hdr;
5274         int status;
5275
5276         status = decode_compound_hdr(xdr, &hdr);
5277         if (status)
5278                 goto out;
5279         status = decode_sequence(xdr, &res->seq_res, rqstp);
5280         if (status)
5281                 goto out;
5282         status = decode_putfh(xdr);
5283         if (status != 0)
5284                 goto out;
5285         status = decode_access(xdr, res);
5286         if (status != 0)
5287                 goto out;
5288         decode_getfattr(xdr, res->fattr, res->server,
5289                         !RPC_IS_ASYNC(rqstp->rq_task));
5290 out:
5291         return status;
5292 }
5293
5294 /*
5295  * Decode LOOKUP response
5296  */
5297 static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5298                                struct nfs4_lookup_res *res)
5299 {
5300         struct compound_hdr hdr;
5301         int status;
5302
5303         status = decode_compound_hdr(xdr, &hdr);
5304         if (status)
5305                 goto out;
5306         status = decode_sequence(xdr, &res->seq_res, rqstp);
5307         if (status)
5308                 goto out;
5309         status = decode_putfh(xdr);
5310         if (status)
5311                 goto out;
5312         status = decode_lookup(xdr);
5313         if (status)
5314                 goto out;
5315         status = decode_getfh(xdr, res->fh);
5316         if (status)
5317                 goto out;
5318         status = decode_getfattr(xdr, res->fattr, res->server
5319                         ,!RPC_IS_ASYNC(rqstp->rq_task));
5320 out:
5321         return status;
5322 }
5323
5324 /*
5325  * Decode LOOKUP_ROOT response
5326  */
5327 static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
5328                                     struct xdr_stream *xdr,
5329                                     struct nfs4_lookup_res *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_putrootfh(xdr);
5341         if (status)
5342                 goto out;
5343         status = decode_getfh(xdr, res->fh);
5344         if (status == 0)
5345                 status = decode_getfattr(xdr, res->fattr, res->server,
5346                                 !RPC_IS_ASYNC(rqstp->rq_task));
5347 out:
5348         return status;
5349 }
5350
5351 /*
5352  * Decode REMOVE response
5353  */
5354 static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5355                                struct nfs_removeres *res)
5356 {
5357         struct compound_hdr hdr;
5358         int status;
5359
5360         status = decode_compound_hdr(xdr, &hdr);
5361         if (status)
5362                 goto out;
5363         status = decode_sequence(xdr, &res->seq_res, rqstp);
5364         if (status)
5365                 goto out;
5366         status = decode_putfh(xdr);
5367         if (status)
5368                 goto out;
5369         status = decode_remove(xdr, &res->cinfo);
5370         if (status)
5371                 goto out;
5372         decode_getfattr(xdr, res->dir_attr, res->server,
5373                         !RPC_IS_ASYNC(rqstp->rq_task));
5374 out:
5375         return status;
5376 }
5377
5378 /*
5379  * Decode RENAME response
5380  */
5381 static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5382                                struct nfs_renameres *res)
5383 {
5384         struct compound_hdr hdr;
5385         int status;
5386
5387         status = decode_compound_hdr(xdr, &hdr);
5388         if (status)
5389                 goto out;
5390         status = decode_sequence(xdr, &res->seq_res, rqstp);
5391         if (status)
5392                 goto out;
5393         status = decode_putfh(xdr);
5394         if (status)
5395                 goto out;
5396         status = decode_savefh(xdr);
5397         if (status)
5398                 goto out;
5399         status = decode_putfh(xdr);
5400         if (status)
5401                 goto out;
5402         status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo);
5403         if (status)
5404                 goto out;
5405         /* Current FH is target directory */
5406         if (decode_getfattr(xdr, res->new_fattr, res->server,
5407                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5408                 goto out;
5409         status = decode_restorefh(xdr);
5410         if (status)
5411                 goto out;
5412         decode_getfattr(xdr, res->old_fattr, res->server,
5413                         !RPC_IS_ASYNC(rqstp->rq_task));
5414 out:
5415         return status;
5416 }
5417
5418 /*
5419  * Decode LINK response
5420  */
5421 static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5422                              struct nfs4_link_res *res)
5423 {
5424         struct compound_hdr hdr;
5425         int status;
5426
5427         status = decode_compound_hdr(xdr, &hdr);
5428         if (status)
5429                 goto out;
5430         status = decode_sequence(xdr, &res->seq_res, rqstp);
5431         if (status)
5432                 goto out;
5433         status = decode_putfh(xdr);
5434         if (status)
5435                 goto out;
5436         status = decode_savefh(xdr);
5437         if (status)
5438                 goto out;
5439         status = decode_putfh(xdr);
5440         if (status)
5441                 goto out;
5442         status = decode_link(xdr, &res->cinfo);
5443         if (status)
5444                 goto out;
5445         /*
5446          * Note order: OP_LINK leaves the directory as the current
5447          *             filehandle.
5448          */
5449         if (decode_getfattr(xdr, res->dir_attr, res->server,
5450                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5451                 goto out;
5452         status = decode_restorefh(xdr);
5453         if (status)
5454                 goto out;
5455         decode_getfattr(xdr, res->fattr, res->server,
5456                         !RPC_IS_ASYNC(rqstp->rq_task));
5457 out:
5458         return status;
5459 }
5460
5461 /*
5462  * Decode CREATE response
5463  */
5464 static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5465                                struct nfs4_create_res *res)
5466 {
5467         struct compound_hdr hdr;
5468         int status;
5469
5470         status = decode_compound_hdr(xdr, &hdr);
5471         if (status)
5472                 goto out;
5473         status = decode_sequence(xdr, &res->seq_res, rqstp);
5474         if (status)
5475                 goto out;
5476         status = decode_putfh(xdr);
5477         if (status)
5478                 goto out;
5479         status = decode_savefh(xdr);
5480         if (status)
5481                 goto out;
5482         status = decode_create(xdr, &res->dir_cinfo);
5483         if (status)
5484                 goto out;
5485         status = decode_getfh(xdr, res->fh);
5486         if (status)
5487                 goto out;
5488         if (decode_getfattr(xdr, res->fattr, res->server,
5489                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5490                 goto out;
5491         status = decode_restorefh(xdr);
5492         if (status)
5493                 goto out;
5494         decode_getfattr(xdr, res->dir_fattr, res->server,
5495                         !RPC_IS_ASYNC(rqstp->rq_task));
5496 out:
5497         return status;
5498 }
5499
5500 /*
5501  * Decode SYMLINK response
5502  */
5503 static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5504                                 struct nfs4_create_res *res)
5505 {
5506         return nfs4_xdr_dec_create(rqstp, xdr, res);
5507 }
5508
5509 /*
5510  * Decode GETATTR response
5511  */
5512 static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5513                                 struct nfs4_getattr_res *res)
5514 {
5515         struct compound_hdr hdr;
5516         int status;
5517
5518         status = decode_compound_hdr(xdr, &hdr);
5519         if (status)
5520                 goto out;
5521         status = decode_sequence(xdr, &res->seq_res, rqstp);
5522         if (status)
5523                 goto out;
5524         status = decode_putfh(xdr);
5525         if (status)
5526                 goto out;
5527         status = decode_getfattr(xdr, res->fattr, res->server,
5528                         !RPC_IS_ASYNC(rqstp->rq_task));
5529 out:
5530         return status;
5531 }
5532
5533 /*
5534  * Encode an SETACL request
5535  */
5536 static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr,
5537                                 struct nfs_setaclargs *args)
5538 {
5539         struct compound_hdr hdr = {
5540                 .minorversion = nfs4_xdr_minorversion(&args->seq_args),
5541         };
5542
5543         encode_compound_hdr(xdr, req, &hdr);
5544         encode_sequence(xdr, &args->seq_args, &hdr);
5545         encode_putfh(xdr, args->fh, &hdr);
5546         encode_setacl(xdr, args, &hdr);
5547         encode_nops(&hdr);
5548 }
5549
5550 /*
5551  * Decode SETACL response
5552  */
5553 static int
5554 nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5555                     struct nfs_setaclres *res)
5556 {
5557         struct compound_hdr hdr;
5558         int status;
5559
5560         status = decode_compound_hdr(xdr, &hdr);
5561         if (status)
5562                 goto out;
5563         status = decode_sequence(xdr, &res->seq_res, rqstp);
5564         if (status)
5565                 goto out;
5566         status = decode_putfh(xdr);
5567         if (status)
5568                 goto out;
5569         status = decode_setattr(xdr);
5570 out:
5571         return status;
5572 }
5573
5574 /*
5575  * Decode GETACL response
5576  */
5577 static int
5578 nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5579                     struct nfs_getaclres *res)
5580 {
5581         struct compound_hdr hdr;
5582         int status;
5583
5584         status = decode_compound_hdr(xdr, &hdr);
5585         if (status)
5586                 goto out;
5587         status = decode_sequence(xdr, &res->seq_res, rqstp);
5588         if (status)
5589                 goto out;
5590         status = decode_putfh(xdr);
5591         if (status)
5592                 goto out;
5593         status = decode_getacl(xdr, rqstp, &res->acl_len);
5594
5595 out:
5596         return status;
5597 }
5598
5599 /*
5600  * Decode CLOSE response
5601  */
5602 static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5603                               struct nfs_closeres *res)
5604 {
5605         struct compound_hdr hdr;
5606         int status;
5607
5608         status = decode_compound_hdr(xdr, &hdr);
5609         if (status)
5610                 goto out;
5611         status = decode_sequence(xdr, &res->seq_res, rqstp);
5612         if (status)
5613                 goto out;
5614         status = decode_putfh(xdr);
5615         if (status)
5616                 goto out;
5617         status = decode_close(xdr, res);
5618         if (status != 0)
5619                 goto out;
5620         /*
5621          * Note: Server may do delete on close for this file
5622          *      in which case the getattr call will fail with
5623          *      an ESTALE error. Shouldn't be a problem,
5624          *      though, since fattr->valid will remain unset.
5625          */
5626         decode_getfattr(xdr, res->fattr, res->server,
5627                         !RPC_IS_ASYNC(rqstp->rq_task));
5628 out:
5629         return status;
5630 }
5631
5632 /*
5633  * Decode OPEN response
5634  */
5635 static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5636                              struct nfs_openres *res)
5637 {
5638         struct compound_hdr hdr;
5639         int status;
5640
5641         status = decode_compound_hdr(xdr, &hdr);
5642         if (status)
5643                 goto out;
5644         status = decode_sequence(xdr, &res->seq_res, rqstp);
5645         if (status)
5646                 goto out;
5647         status = decode_putfh(xdr);
5648         if (status)
5649                 goto out;
5650         status = decode_savefh(xdr);
5651         if (status)
5652                 goto out;
5653         status = decode_open(xdr, res);
5654         if (status)
5655                 goto out;
5656         if (decode_getfh(xdr, &res->fh) != 0)
5657                 goto out;
5658         if (decode_getfattr(xdr, res->f_attr, res->server,
5659                                 !RPC_IS_ASYNC(rqstp->rq_task)) != 0)
5660                 goto out;
5661         if (decode_restorefh(xdr) != 0)
5662                 goto out;
5663         decode_getfattr(xdr, res->dir_attr, res->server,
5664                         !RPC_IS_ASYNC(rqstp->rq_task));
5665 out:
5666         return status;
5667 }
5668
5669 /*
5670  * Decode OPEN_CONFIRM response
5671  */
5672 static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp,
5673                                      struct xdr_stream *xdr,
5674                                      struct nfs_open_confirmres *res)
5675 {
5676         struct compound_hdr hdr;
5677         int status;
5678
5679         status = decode_compound_hdr(xdr, &hdr);
5680         if (status)
5681                 goto out;
5682         status = decode_putfh(xdr);
5683         if (status)
5684                 goto out;
5685         status = decode_open_confirm(xdr, res);
5686 out:
5687         return status;
5688 }
5689
5690 /*
5691  * Decode OPEN response
5692  */
5693 static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp,
5694                                     struct xdr_stream *xdr,
5695                                     struct nfs_openres *res)
5696 {
5697         struct compound_hdr hdr;
5698         int status;
5699
5700         status = decode_compound_hdr(xdr, &hdr);
5701         if (status)
5702                 goto out;
5703         status = decode_sequence(xdr, &res->seq_res, rqstp);
5704         if (status)
5705                 goto out;
5706         status = decode_putfh(xdr);
5707         if (status)
5708                 goto out;
5709         status = decode_open(xdr, res);
5710         if (status)
5711                 goto out;
5712         decode_getfattr(xdr, res->f_attr, res->server,
5713                         !RPC_IS_ASYNC(rqstp->rq_task));
5714 out:
5715         return status;
5716 }
5717
5718 /*
5719  * Decode SETATTR response
5720  */
5721 static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
5722                                 struct xdr_stream *xdr,
5723                                 struct nfs_setattrres *res)
5724 {
5725         struct compound_hdr hdr;
5726         int status;
5727
5728         status = decode_compound_hdr(xdr, &hdr);
5729         if (status)
5730                 goto out;
5731         status = decode_sequence(xdr, &res->seq_res, rqstp);
5732         if (status)
5733                 goto out;
5734         status = decode_putfh(xdr);
5735         if (status)
5736                 goto out;
5737         status = decode_setattr(xdr);
5738         if (status)
5739                 goto out;
5740         decode_getfattr(xdr, res->fattr, res->server,
5741                         !RPC_IS_ASYNC(rqstp->rq_task));
5742 out:
5743         return status;
5744 }
5745
5746 /*
5747  * Decode LOCK response
5748  */
5749 static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5750                              struct nfs_lock_res *res)
5751 {
5752         struct compound_hdr hdr;
5753         int status;
5754
5755         status = decode_compound_hdr(xdr, &hdr);
5756         if (status)
5757                 goto out;
5758         status = decode_sequence(xdr, &res->seq_res, rqstp);
5759         if (status)
5760                 goto out;
5761         status = decode_putfh(xdr);
5762         if (status)
5763                 goto out;
5764         status = decode_lock(xdr, res);
5765 out:
5766         return status;
5767 }
5768
5769 /*
5770  * Decode LOCKT response
5771  */
5772 static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5773                               struct nfs_lockt_res *res)
5774 {
5775         struct compound_hdr hdr;
5776         int status;
5777
5778         status = decode_compound_hdr(xdr, &hdr);
5779         if (status)
5780                 goto out;
5781         status = decode_sequence(xdr, &res->seq_res, rqstp);
5782         if (status)
5783                 goto out;
5784         status = decode_putfh(xdr);
5785         if (status)
5786                 goto out;
5787         status = decode_lockt(xdr, res);
5788 out:
5789         return status;
5790 }
5791
5792 /*
5793  * Decode LOCKU response
5794  */
5795 static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5796                               struct nfs_locku_res *res)
5797 {
5798         struct compound_hdr hdr;
5799         int status;
5800
5801         status = decode_compound_hdr(xdr, &hdr);
5802         if (status)
5803                 goto out;
5804         status = decode_sequence(xdr, &res->seq_res, rqstp);
5805         if (status)
5806                 goto out;
5807         status = decode_putfh(xdr);
5808         if (status)
5809                 goto out;
5810         status = decode_locku(xdr, res);
5811 out:
5812         return status;
5813 }
5814
5815 static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp,
5816                                           struct xdr_stream *xdr, void *dummy)
5817 {
5818         struct compound_hdr hdr;
5819         int status;
5820
5821         status = decode_compound_hdr(xdr, &hdr);
5822         if (!status)
5823                 status = decode_release_lockowner(xdr);
5824         return status;
5825 }
5826
5827 /*
5828  * Decode READLINK response
5829  */
5830 static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp,
5831                                  struct xdr_stream *xdr,
5832                                  struct nfs4_readlink_res *res)
5833 {
5834         struct compound_hdr hdr;
5835         int status;
5836
5837         status = decode_compound_hdr(xdr, &hdr);
5838         if (status)
5839                 goto out;
5840         status = decode_sequence(xdr, &res->seq_res, rqstp);
5841         if (status)
5842                 goto out;
5843         status = decode_putfh(xdr);
5844         if (status)
5845                 goto out;
5846         status = decode_readlink(xdr, rqstp);
5847 out:
5848         return status;
5849 }
5850
5851 /*
5852  * Decode READDIR response
5853  */
5854 static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5855                                 struct nfs4_readdir_res *res)
5856 {
5857         struct compound_hdr hdr;
5858         int status;
5859
5860         status = decode_compound_hdr(xdr, &hdr);
5861         if (status)
5862                 goto out;
5863         status = decode_sequence(xdr, &res->seq_res, rqstp);
5864         if (status)
5865                 goto out;
5866         status = decode_putfh(xdr);
5867         if (status)
5868                 goto out;
5869         status = decode_readdir(xdr, rqstp, res);
5870 out:
5871         return status;
5872 }
5873
5874 /*
5875  * Decode Read response
5876  */
5877 static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5878                              struct nfs_readres *res)
5879 {
5880         struct compound_hdr hdr;
5881         int status;
5882
5883         status = decode_compound_hdr(xdr, &hdr);
5884         if (status)
5885                 goto out;
5886         status = decode_sequence(xdr, &res->seq_res, rqstp);
5887         if (status)
5888                 goto out;
5889         status = decode_putfh(xdr);
5890         if (status)
5891                 goto out;
5892         status = decode_read(xdr, rqstp, res);
5893         if (!status)
5894                 status = res->count;
5895 out:
5896         return status;
5897 }
5898
5899 /*
5900  * Decode WRITE response
5901  */
5902 static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5903                               struct nfs_writeres *res)
5904 {
5905         struct compound_hdr hdr;
5906         int status;
5907
5908         status = decode_compound_hdr(xdr, &hdr);
5909         if (status)
5910                 goto out;
5911         status = decode_sequence(xdr, &res->seq_res, rqstp);
5912         if (status)
5913                 goto out;
5914         status = decode_putfh(xdr);
5915         if (status)
5916                 goto out;
5917         status = decode_write(xdr, res);
5918         if (status)
5919                 goto out;
5920         if (res->fattr)
5921                 decode_getfattr(xdr, res->fattr, res->server,
5922                                 !RPC_IS_ASYNC(rqstp->rq_task));
5923         if (!status)
5924                 status = res->count;
5925 out:
5926         return status;
5927 }
5928
5929 /*
5930  * Decode COMMIT response
5931  */
5932 static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
5933                                struct nfs_writeres *res)
5934 {
5935         struct compound_hdr hdr;
5936         int status;
5937
5938         status = decode_compound_hdr(xdr, &hdr);
5939         if (status)
5940                 goto out;
5941         status = decode_sequence(xdr, &res->seq_res, rqstp);
5942         if (status)
5943                 goto out;
5944         status = decode_putfh(xdr);
5945         if (status)
5946                 goto out;
5947         status = decode_commit(xdr, res);
5948         if (status)
5949                 goto out;
5950         if (res->fattr)
5951                 decode_getfattr(xdr, res->fattr, res->server,
5952                                 !RPC_IS_ASYNC(rqstp->rq_task));
5953 out:
5954         return status;
5955 }
5956
5957 /*
5958  * Decode FSINFO response
5959  */
5960 static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr,
5961                                struct nfs4_fsinfo_res *res)
5962 {
5963         struct compound_hdr hdr;
5964         int status;
5965
5966         status = decode_compound_hdr(xdr, &hdr);
5967         if (!status)
5968                 status = decode_sequence(xdr, &res->seq_res, req);
5969         if (!status)
5970                 status = decode_putfh(xdr);
5971         if (!status)
5972                 status = decode_fsinfo(xdr, res->fsinfo);
5973         return status;
5974 }
5975
5976 /*
5977  * Decode PATHCONF response
5978  */
5979 static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr,
5980                                  struct nfs4_pathconf_res *res)
5981 {
5982         struct compound_hdr hdr;
5983         int status;
5984
5985         status = decode_compound_hdr(xdr, &hdr);
5986         if (!status)
5987                 status = decode_sequence(xdr, &res->seq_res, req);
5988         if (!status)
5989                 status = decode_putfh(xdr);
5990         if (!status)
5991                 status = decode_pathconf(xdr, res->pathconf);
5992         return status;
5993 }
5994
5995 /*
5996  * Decode STATFS response
5997  */
5998 static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr,
5999                                struct nfs4_statfs_res *res)
6000 {
6001         struct compound_hdr hdr;
6002         int status;
6003
6004         status = decode_compound_hdr(xdr, &hdr);
6005         if (!status)
6006                 status = decode_sequence(xdr, &res->seq_res, req);
6007         if (!status)
6008                 status = decode_putfh(xdr);
6009         if (!status)
6010                 status = decode_statfs(xdr, res->fsstat);
6011         return status;
6012 }
6013
6014 /*
6015  * Decode GETATTR_BITMAP response
6016  */
6017 static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req,
6018                                     struct xdr_stream *xdr,
6019                                     struct nfs4_server_caps_res *res)
6020 {
6021         struct compound_hdr hdr;
6022         int status;
6023
6024         status = decode_compound_hdr(xdr, &hdr);
6025         if (status)
6026                 goto out;
6027         status = decode_sequence(xdr, &res->seq_res, req);
6028         if (status)
6029                 goto out;
6030         status = decode_putfh(xdr);
6031         if (status)
6032                 goto out;
6033         status = decode_server_caps(xdr, res);
6034 out:
6035         return status;
6036 }
6037
6038 /*
6039  * Decode RENEW response
6040  */
6041 static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
6042                               void *__unused)
6043 {
6044         struct compound_hdr hdr;
6045         int status;
6046
6047         status = decode_compound_hdr(xdr, &hdr);
6048         if (!status)
6049                 status = decode_renew(xdr);
6050         return status;
6051 }
6052
6053 /*
6054  * Decode SETCLIENTID response
6055  */
6056 static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req,
6057                                     struct xdr_stream *xdr,
6058                                     struct nfs4_setclientid_res *res)
6059 {
6060         struct compound_hdr hdr;
6061         int status;
6062
6063         status = decode_compound_hdr(xdr, &hdr);
6064         if (!status)
6065                 status = decode_setclientid(xdr, res);
6066         return status;
6067 }
6068
6069 /*
6070  * Decode SETCLIENTID_CONFIRM response
6071  */
6072 static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req,
6073                                             struct xdr_stream *xdr,
6074                                             struct nfs_fsinfo *fsinfo)
6075 {
6076         struct compound_hdr hdr;
6077         int status;
6078
6079         status = decode_compound_hdr(xdr, &hdr);
6080         if (!status)
6081                 status = decode_setclientid_confirm(xdr);
6082         if (!status)
6083                 status = decode_putrootfh(xdr);
6084         if (!status)
6085                 status = decode_fsinfo(xdr, fsinfo);
6086         return status;
6087 }
6088
6089 /*
6090  * Decode DELEGRETURN response
6091  */
6092 static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
6093                                     struct xdr_stream *xdr,
6094                                     struct nfs4_delegreturnres *res)
6095 {
6096         struct compound_hdr hdr;
6097         int status;
6098
6099         status = decode_compound_hdr(xdr, &hdr);
6100         if (status)
6101                 goto out;
6102         status = decode_sequence(xdr, &res->seq_res, rqstp);
6103         if (status)
6104                 goto out;
6105         status = decode_putfh(xdr);
6106         if (status != 0)
6107                 goto out;
6108         status = decode_delegreturn(xdr);
6109         if (status != 0)
6110                 goto out;
6111         decode_getfattr(xdr, res->fattr, res->server,
6112                         !RPC_IS_ASYNC(rqstp->rq_task));
6113 out:
6114         return status;
6115 }
6116
6117 /*
6118  * Decode FS_LOCATIONS response
6119  */
6120 static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
6121                                      struct xdr_stream *xdr,
6122                                      struct nfs4_fs_locations_res *res)
6123 {
6124         struct compound_hdr hdr;
6125         int status;
6126
6127         status = decode_compound_hdr(xdr, &hdr);
6128         if (status)
6129                 goto out;
6130         status = decode_sequence(xdr, &res->seq_res, req);
6131         if (status)
6132                 goto out;
6133         status = decode_putfh(xdr);
6134         if (status)
6135                 goto out;
6136         status = decode_lookup(xdr);
6137         if (status)
6138                 goto out;
6139         xdr_enter_page(xdr, PAGE_SIZE);
6140         status = decode_getfattr(xdr, &res->fs_locations->fattr,
6141                                  res->fs_locations->server,
6142                                  !RPC_IS_ASYNC(req->rq_task));
6143 out:
6144         return status;
6145 }
6146
6147 /*
6148  * Decode SECINFO response
6149  */
6150 static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
6151                                 struct xdr_stream *xdr,
6152                                 struct nfs4_secinfo_res *res)
6153 {
6154         struct compound_hdr hdr;
6155         int status;
6156
6157         status = decode_compound_hdr(xdr, &hdr);
6158         if (status)
6159                 goto out;
6160         status = decode_sequence(xdr, &res->seq_res, rqstp);
6161         if (status)
6162                 goto out;
6163         status = decode_putfh(xdr);
6164         if (status)
6165                 goto out;
6166         status = decode_secinfo(xdr, res);
6167         if (status)
6168                 goto out;
6169 out:
6170         return status;
6171 }
6172
6173 #if defined(CONFIG_NFS_V4_1)
6174 /*
6175  * Decode EXCHANGE_ID response
6176  */
6177 static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp,
6178                                     struct xdr_stream *xdr,
6179                                     void *res)
6180 {
6181         struct compound_hdr hdr;
6182         int status;
6183
6184         status = decode_compound_hdr(xdr, &hdr);
6185         if (!status)
6186                 status = decode_exchange_id(xdr, res);
6187         return status;
6188 }
6189
6190 /*
6191  * Decode CREATE_SESSION response
6192  */
6193 static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp,
6194                                        struct xdr_stream *xdr,
6195                                        struct nfs41_create_session_res *res)
6196 {
6197         struct compound_hdr hdr;
6198         int status;
6199
6200         status = decode_compound_hdr(xdr, &hdr);
6201         if (!status)
6202                 status = decode_create_session(xdr, res);
6203         return status;
6204 }
6205
6206 /*
6207  * Decode DESTROY_SESSION response
6208  */
6209 static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp,
6210                                         struct xdr_stream *xdr,
6211                                         void *res)
6212 {
6213         struct compound_hdr hdr;
6214         int status;
6215
6216         status = decode_compound_hdr(xdr, &hdr);
6217         if (!status)
6218                 status = decode_destroy_session(xdr, res);
6219         return status;
6220 }
6221
6222 /*
6223  * Decode SEQUENCE response
6224  */
6225 static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp,
6226                                  struct xdr_stream *xdr,
6227                                  struct nfs4_sequence_res *res)
6228 {
6229         struct compound_hdr hdr;
6230         int status;
6231
6232         status = decode_compound_hdr(xdr, &hdr);
6233         if (!status)
6234                 status = decode_sequence(xdr, res, rqstp);
6235         return status;
6236 }
6237
6238 /*
6239  * Decode GET_LEASE_TIME response
6240  */
6241 static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp,
6242                                        struct xdr_stream *xdr,
6243                                        struct nfs4_get_lease_time_res *res)
6244 {
6245         struct compound_hdr hdr;
6246         int status;
6247
6248         status = decode_compound_hdr(xdr, &hdr);
6249         if (!status)
6250                 status = decode_sequence(xdr, &res->lr_seq_res, rqstp);
6251         if (!status)
6252                 status = decode_putrootfh(xdr);
6253         if (!status)
6254                 status = decode_fsinfo(xdr, res->lr_fsinfo);
6255         return status;
6256 }
6257
6258 /*
6259  * Decode RECLAIM_COMPLETE response
6260  */
6261 static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp,
6262                                          struct xdr_stream *xdr,
6263                                          struct nfs41_reclaim_complete_res *res)
6264 {
6265         struct compound_hdr hdr;
6266         int status;
6267
6268         status = decode_compound_hdr(xdr, &hdr);
6269         if (!status)
6270                 status = decode_sequence(xdr, &res->seq_res, rqstp);
6271         if (!status)
6272                 status = decode_reclaim_complete(xdr, (void *)NULL);
6273         return status;
6274 }
6275
6276 /*
6277  * Decode GETDEVINFO response
6278  */
6279 static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp,
6280                                       struct xdr_stream *xdr,
6281                                       struct nfs4_getdeviceinfo_res *res)
6282 {
6283         struct compound_hdr hdr;
6284         int status;
6285
6286         status = decode_compound_hdr(xdr, &hdr);
6287         if (status != 0)
6288                 goto out;
6289         status = decode_sequence(xdr, &res->seq_res, rqstp);
6290         if (status != 0)
6291                 goto out;
6292         status = decode_getdeviceinfo(xdr, res->pdev);
6293 out:
6294         return status;
6295 }
6296
6297 /*
6298  * Decode LAYOUTGET response
6299  */
6300 static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
6301                                   struct xdr_stream *xdr,
6302                                   struct nfs4_layoutget_res *res)
6303 {
6304         struct compound_hdr hdr;
6305         int status;
6306
6307         status = decode_compound_hdr(xdr, &hdr);
6308         if (status)
6309                 goto out;
6310         status = decode_sequence(xdr, &res->seq_res, rqstp);
6311         if (status)
6312                 goto out;
6313         status = decode_putfh(xdr);
6314         if (status)
6315                 goto out;
6316         status = decode_layoutget(xdr, rqstp, res);
6317 out:
6318         return status;
6319 }
6320
6321 /*
6322  * Decode LAYOUTCOMMIT response
6323  */
6324 static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
6325                                      struct xdr_stream *xdr,
6326                                      struct nfs4_layoutcommit_res *res)
6327 {
6328         struct compound_hdr hdr;
6329         int status;
6330
6331         status = decode_compound_hdr(xdr, &hdr);
6332         if (status)
6333                 goto out;
6334         status = decode_sequence(xdr, &res->seq_res, rqstp);
6335         if (status)
6336                 goto out;
6337         status = decode_putfh(xdr);
6338         if (status)
6339                 goto out;
6340         status = decode_layoutcommit(xdr, rqstp, res);
6341         if (status)
6342                 goto out;
6343         decode_getfattr(xdr, res->fattr, res->server,
6344                         !RPC_IS_ASYNC(rqstp->rq_task));
6345 out:
6346         return status;
6347 }
6348 #endif /* CONFIG_NFS_V4_1 */
6349
6350 /**
6351  * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in
6352  *                      the local page cache.
6353  * @xdr: XDR stream where entry resides
6354  * @entry: buffer to fill in with entry data
6355  * @plus: boolean indicating whether this should be a readdirplus entry
6356  *
6357  * Returns zero if successful, otherwise a negative errno value is
6358  * returned.
6359  *
6360  * This function is not invoked during READDIR reply decoding, but
6361  * rather whenever an application invokes the getdents(2) system call
6362  * on a directory already in our cache.
6363  */
6364 int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
6365                        int plus)
6366 {
6367         uint32_t bitmap[2] = {0};
6368         uint32_t len;
6369         __be32 *p = xdr_inline_decode(xdr, 4);
6370         if (unlikely(!p))
6371                 goto out_overflow;
6372         if (*p == xdr_zero) {
6373                 p = xdr_inline_decode(xdr, 4);
6374                 if (unlikely(!p))
6375                         goto out_overflow;
6376                 if (*p == xdr_zero)
6377                         return -EAGAIN;
6378                 entry->eof = 1;
6379                 return -EBADCOOKIE;
6380         }
6381
6382         p = xdr_inline_decode(xdr, 12);
6383         if (unlikely(!p))
6384                 goto out_overflow;
6385         entry->prev_cookie = entry->cookie;
6386         p = xdr_decode_hyper(p, &entry->cookie);
6387         entry->len = be32_to_cpup(p);
6388
6389         p = xdr_inline_decode(xdr, entry->len);
6390         if (unlikely(!p))
6391                 goto out_overflow;
6392         entry->name = (const char *) p;
6393
6394         /*
6395          * In case the server doesn't return an inode number,
6396          * we fake one here.  (We don't use inode number 0,
6397          * since glibc seems to choke on it...)
6398          */
6399         entry->ino = 1;
6400         entry->fattr->valid = 0;
6401
6402         if (decode_attr_bitmap(xdr, bitmap) < 0)
6403                 goto out_overflow;
6404
6405         if (decode_attr_length(xdr, &len, &p) < 0)
6406                 goto out_overflow;
6407
6408         if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
6409                                         entry->server, 1) < 0)
6410                 goto out_overflow;
6411         if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
6412                 entry->ino = entry->fattr->fileid;
6413
6414         entry->d_type = DT_UNKNOWN;
6415         if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
6416                 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
6417
6418         return 0;
6419
6420 out_overflow:
6421         print_overflow_msg(__func__, xdr);
6422         return -EAGAIN;
6423 }
6424
6425 /*
6426  * We need to translate between nfs status return values and
6427  * the local errno values which may not be the same.
6428  */
6429 static struct {
6430         int stat;
6431         int errno;
6432 } nfs_errtbl[] = {
6433         { NFS4_OK,              0               },
6434         { NFS4ERR_PERM,         -EPERM          },
6435         { NFS4ERR_NOENT,        -ENOENT         },
6436         { NFS4ERR_IO,           -errno_NFSERR_IO},
6437         { NFS4ERR_NXIO,         -ENXIO          },
6438         { NFS4ERR_ACCESS,       -EACCES         },
6439         { NFS4ERR_EXIST,        -EEXIST         },
6440         { NFS4ERR_XDEV,         -EXDEV          },
6441         { NFS4ERR_NOTDIR,       -ENOTDIR        },
6442         { NFS4ERR_ISDIR,        -EISDIR         },
6443         { NFS4ERR_INVAL,        -EINVAL         },
6444         { NFS4ERR_FBIG,         -EFBIG          },
6445         { NFS4ERR_NOSPC,        -ENOSPC         },
6446         { NFS4ERR_ROFS,         -EROFS          },
6447         { NFS4ERR_MLINK,        -EMLINK         },
6448         { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
6449         { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
6450         { NFS4ERR_DQUOT,        -EDQUOT         },
6451         { NFS4ERR_STALE,        -ESTALE         },
6452         { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
6453         { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
6454         { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
6455         { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
6456         { NFS4ERR_SERVERFAULT,  -EREMOTEIO      },
6457         { NFS4ERR_BADTYPE,      -EBADTYPE       },
6458         { NFS4ERR_LOCKED,       -EAGAIN         },
6459         { NFS4ERR_SYMLINK,      -ELOOP          },
6460         { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
6461         { NFS4ERR_DEADLOCK,     -EDEADLK        },
6462         { -1,                   -EIO            }
6463 };
6464
6465 /*
6466  * Convert an NFS error code to a local one.
6467  * This one is used jointly by NFSv2 and NFSv3.
6468  */
6469 static int
6470 nfs4_stat_to_errno(int stat)
6471 {
6472         int i;
6473         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
6474                 if (nfs_errtbl[i].stat == stat)
6475                         return nfs_errtbl[i].errno;
6476         }
6477         if (stat <= 10000 || stat > 10100) {
6478                 /* The server is looney tunes. */
6479                 return -EREMOTEIO;
6480         }
6481         /* If we cannot translate the error, the recovery routines should
6482          * handle it.
6483          * Note: remaining NFSv4 error codes have values > 10000, so should
6484          * not conflict with native Linux error codes.
6485          */
6486         return -stat;
6487 }
6488
6489 #define PROC(proc, argtype, restype)                            \
6490 [NFSPROC4_CLNT_##proc] = {                                      \
6491         .p_proc   = NFSPROC4_COMPOUND,                          \
6492         .p_encode = (kxdreproc_t)nfs4_xdr_##argtype,            \
6493         .p_decode = (kxdrdproc_t)nfs4_xdr_##restype,            \
6494         .p_arglen = NFS4_##argtype##_sz,                        \
6495         .p_replen = NFS4_##restype##_sz,                        \
6496         .p_statidx = NFSPROC4_CLNT_##proc,                      \
6497         .p_name   = #proc,                                      \
6498 }
6499
6500 struct rpc_procinfo     nfs4_procedures[] = {
6501         PROC(READ,              enc_read,               dec_read),
6502         PROC(WRITE,             enc_write,              dec_write),
6503         PROC(COMMIT,            enc_commit,             dec_commit),
6504         PROC(OPEN,              enc_open,               dec_open),
6505         PROC(OPEN_CONFIRM,      enc_open_confirm,       dec_open_confirm),
6506         PROC(OPEN_NOATTR,       enc_open_noattr,        dec_open_noattr),
6507         PROC(OPEN_DOWNGRADE,    enc_open_downgrade,     dec_open_downgrade),
6508         PROC(CLOSE,             enc_close,              dec_close),
6509         PROC(SETATTR,           enc_setattr,            dec_setattr),
6510         PROC(FSINFO,            enc_fsinfo,             dec_fsinfo),
6511         PROC(RENEW,             enc_renew,              dec_renew),
6512         PROC(SETCLIENTID,       enc_setclientid,        dec_setclientid),
6513         PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm),
6514         PROC(LOCK,              enc_lock,               dec_lock),
6515         PROC(LOCKT,             enc_lockt,              dec_lockt),
6516         PROC(LOCKU,             enc_locku,              dec_locku),
6517         PROC(ACCESS,            enc_access,             dec_access),
6518         PROC(GETATTR,           enc_getattr,            dec_getattr),
6519         PROC(LOOKUP,            enc_lookup,             dec_lookup),
6520         PROC(LOOKUP_ROOT,       enc_lookup_root,        dec_lookup_root),
6521         PROC(REMOVE,            enc_remove,             dec_remove),
6522         PROC(RENAME,            enc_rename,             dec_rename),
6523         PROC(LINK,              enc_link,               dec_link),
6524         PROC(SYMLINK,           enc_symlink,            dec_symlink),
6525         PROC(CREATE,            enc_create,             dec_create),
6526         PROC(PATHCONF,          enc_pathconf,           dec_pathconf),
6527         PROC(STATFS,            enc_statfs,             dec_statfs),
6528         PROC(READLINK,          enc_readlink,           dec_readlink),
6529         PROC(READDIR,           enc_readdir,            dec_readdir),
6530         PROC(SERVER_CAPS,       enc_server_caps,        dec_server_caps),
6531         PROC(DELEGRETURN,       enc_delegreturn,        dec_delegreturn),
6532         PROC(GETACL,            enc_getacl,             dec_getacl),
6533         PROC(SETACL,            enc_setacl,             dec_setacl),
6534         PROC(FS_LOCATIONS,      enc_fs_locations,       dec_fs_locations),
6535         PROC(RELEASE_LOCKOWNER, enc_release_lockowner,  dec_release_lockowner),
6536         PROC(SECINFO,           enc_secinfo,            dec_secinfo),
6537 #if defined(CONFIG_NFS_V4_1)
6538         PROC(EXCHANGE_ID,       enc_exchange_id,        dec_exchange_id),
6539         PROC(CREATE_SESSION,    enc_create_session,     dec_create_session),
6540         PROC(DESTROY_SESSION,   enc_destroy_session,    dec_destroy_session),
6541         PROC(SEQUENCE,          enc_sequence,           dec_sequence),
6542         PROC(GET_LEASE_TIME,    enc_get_lease_time,     dec_get_lease_time),
6543         PROC(RECLAIM_COMPLETE,  enc_reclaim_complete,   dec_reclaim_complete),
6544         PROC(GETDEVICEINFO,     enc_getdeviceinfo,      dec_getdeviceinfo),
6545         PROC(LAYOUTGET,         enc_layoutget,          dec_layoutget),
6546         PROC(LAYOUTCOMMIT,      enc_layoutcommit,       dec_layoutcommit),
6547 #endif /* CONFIG_NFS_V4_1 */
6548 };
6549
6550 struct rpc_version              nfs_version4 = {
6551         .number                 = 4,
6552         .nrprocs                = ARRAY_SIZE(nfs4_procedures),
6553         .procs                  = nfs4_procedures
6554 };
6555
6556 /*
6557  * Local variables:
6558  *  c-basic-offset: 8
6559  * End:
6560  */